(19)
(11)EP 3 211 478 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
03.06.2020 Bulletin 2020/23

(21)Application number: 15832675.1

(22)Date of filing:  20.10.2015
(51)International Patent Classification (IPC): 
G02F 1/1343(2006.01)
G02F 1/1335(2006.01)
G02F 1/1333(2006.01)
(86)International application number:
PCT/CN2015/092257
(87)International publication number:
WO 2016/062235 (28.04.2016 Gazette  2016/17)

(54)

DISPLAY PANEL AND MANUFACTURING METHOD THEREFOR

ANZEIGETAFEL UND HERSTELLUNGSVERFAHREN DAFÜR

PANNEAU D'AFFICHAGE ET SON PROCÉDÉ DE FABRICATION


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 24.10.2014 CN 201410575707

(43)Date of publication of application:
30.08.2017 Bulletin 2017/35

(73)Proprietors:
  • BOE Technology Group Co., Ltd.
    Beijing 100015 (CN)
  • Beijing BOE Display Technology Co., Ltd.
    Beijing 100176 (CN)

(72)Inventors:
  • LIU, Sha
    Beijing 100176 (CN)
  • ZHAO, Feng
    Beijing 100176 (CN)

(74)Representative: Cohausz & Florack 
Patent- & Rechtsanwälte Partnerschaftsgesellschaft mbB Bleichstraße 14
40211 Düsseldorf
40211 Düsseldorf (DE)


(56)References cited: : 
EP-A1- 1 584 972
CN-A- 103 197 478
CN-A- 104 280 953
US-A1- 2007 152 932
US-A1- 2013 050 625
CN-A- 102 707 528
CN-A- 103 487 986
CN-A- 104 808 844
US-A1- 2012 188 476
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Field of the Invention



    [0001] The present invention relates to the field of display technology, in particular to a liquid crystal display panel and a method for fabricating the same.

    Background of the Invention



    [0002] ADS (Advanced Super Dimension Switch) display panel is a display panel having an ADS display mode, which has advantages such as wide viewing angle, small color bias and high transmittance.

    [0003] Specifically, ADS display panel causes the liquid crystal molecules within the ADS display panel to deflect by the electric field produced by edges of the pixel electrodes in a same plane and the multidimensional field formed by the electric field produced between the pixel electrodes and the common electrode. The ADS display panel comprises a display area and a non-display area surrounding the display area. The ADS display mode is a kind of normally black mode, wherein the liquid crystal molecules in the non-display area do not rotate when the ADS display panel is in a non-closed state (including a dark state and a display state), thereby no light can transmit through the non-display area and the non-display area renders a dark state.

    [0004] A patent application publication US 2007/152932A1 provides a liquid crystal panel that limits a viewing angle. The liquid crystal panel includes a plurality of color pixels and a plurality of interference sub-pixels. Each of the color pixels includes red (R), green (G) and blue (B) sub-pixels. The interference sub-pixels are included in each of the color pixels and disposed on the same plane as the color pixels to control light that penetrates the liquid crystal panel and travels in side directions of the liquid crystal panel, except the front direction thereof. The viewing angle can be controlled by the interference sub-pixels. Since the interference sub-pixels and the color sub-pixels are disposed on the same plane, the thickness and weight of the liquid crystal panel do not increase. Further, it is possible to prevent the decrease of the light quantity and the degradation of the brightness.

    [0005] Patent application publication CN101211047 discloses a display panel comprising a central area and a peripheral area surrounding the central area, wherein the display mode of the central area is a display mode controlled by a vertical electric field and the display mode of the peripheral area is a display mode controlled by a vertical electric field. The focus of the document is in reducing light leakage in the peripheral area of a display operated in a display mode controlled by a vertical electric field.

    [0006] The inventors found that, when the ADS display panel in a non-closed state is compressed by external forces, the liquid crystal molecules in the non-display area of the ADS display panel will be deflected to some extent, resulting in light leakage of the ADS display panel.

    Summary of the Invention



    [0007] An object of the present invention is to provide a liquid crystal display panel and a method for fabricating the same which can prevent light leakage of the display panel.

    [0008] To solve the above technical problems, according to the embodiments of the present invention, there is provided a liquid crystal display panel as defined in independent claim 1 and a method for fabricating a liquid crystal display panel as defined in independent claim 9. Further embodiments of the invention are recited in the dependent claims.

    [0009] An embodiment of the present invention provides a display panel including the central area and the peripheral area, the display mode of the central area is a display mode controlled by a horizontal electric field or multi-dimensional electric field, the display mode of the peripheral area is a display mode controlled by a vertical electric field, thus the dark state of the peripheral area is controlled by electric field and will not be influenced by external forces, thereby the display panel can be prevented from light leakage.

    [0010] Embodiments of the present invention provide a method for fabricating a display panel, comprising:
    forming an array substrate, wherein the central area of the array substrate is provided with the first pixel electrodes and the first common electrode, the first pixel electrodes and/or the first common electrode are slit electrodes, the peripheral area of the array substrate is provided with the second pixel electrodes; and forming a color filter substrate, wherein the peripheral area of the color filter substrate is provided with a second common electrode, the second pixel electrodes and/or the first common electrode are plate-shaped electrodes, so that the formed display panel has a dark state of the peripheral area which is controlled by electric field and will not be influenced by external forces, thereby the display panel can be prevented from light leakage.

    Brief Description of the Drawings



    [0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of prior art, the accompanying drawings to which description of the embodiments refers will be briefly described. Apparently, the accompanying drawings to be described below is only a part of the embodiments of the present invention, those skilled in the art can obtain other drawings based on these accompanying drawings without creative efforts.

    Figure 1 is a schematic view showing the display panel in a display state according to the first embodiment of the present invention;

    Figure 2 is a schematic view showing the display panel in a closed state according to the first embodiment of the present invention;

    Figure 3 is a schematic view showing the display panel in a dark state according to the first embodiment of the present invention;

    Figure 4 is a flowchart illustrating the fabricating method of the display panel according to an embodiment of the present invention.


    Reference numerals:



    [0012] 

    a- central area; b- peripheral area; 1- array substrate;

    11- first pixel electrode; 12- first common electrode; 13- second pixel electrode;

    14- thin film transistor; 2- color filter substrate; 21- second common electrode;

    22- black matrix; 23- color filter layer; 3- liquid crystal molecules layer;

    4- first alignment film; 5- third alignment film; 6- second alignment film;

    7- fourth alignment film; 8- lower polarizer; 9- upper polarizer.


    Detailed Description of the Embodiments



    [0013] A clear and complete description of the embodiments of the present invention will now be made in conjunction with the accompanying drawings. Apparently, the described embodiments are part of rather than all of the embodiments of the present invention. In view of the embodiments of the present invention, other embodiments can be obtained by those skilled in the art without creative efforts, and these embodiments also fall within the protective scope of present invention.

    First Embodiment



    [0014] An embodiment of the invention provides a display panel, the display panel can be prevented from light leakage.

    [0015] Specifically, as shown in Figure 1, Figure 2 and Figure 3, the display panel is divided into a central area a and a peripheral area b, wherein the display mode of the central area a is a display mode controlled by a horizontal electric field or multi-dimensional electric field, the display mode of the peripheral area b is a display mode controlled by a vertical electric field. In an example, the display mode of the central area a is ADS mode, the display mode of the peripheral area b is a TN mode. The central area a is located within or corresponds to the display area of the display panel. Specifically, the specific size relationship between the display area and the central area a can be designed based on the specific position of the frame and common light leakage ranges in the prior art solutions.

    [0016] An embodiment of the present invention provides a display panel including the central area and the peripheral area, the display mode of the central area is a display mode controlled by a horizontal electric field or multi-dimensional electric field, the display mode of the peripheral area is a display mode controlled by a vertical electric field, thus the dark state of the peripheral area is controlled by electric field and will not be influenced by external forces, thereby the display panel can be prevented from light leakage.

    [0017] Specifically, as shown in Figure 1, Figure 2 and Figure 3, the display panel includes an array substrate 1 and a color filter substrate 2 disposed opposite to each other, the central area of the array substrate 1 is provided with first pixel electrodes 11 and a first common electrode 12, the first pixel electrodes 11 and/or the first common electrode 12 are slit electrodes; the peripheral area of the array substrate 1 is provided with second pixel electrodes 13, the peripheral area of the color filter substrate 2 is provided with a second common electrode 21, the second pixel electrodes 13 and the second common electrode 21 are plate-shaped electrodes, thereby the display mode of the central area a is a display mode controlled by a horizontal electric field or multi-dimensional electric field, the display mode of the peripheral area b is a display mode controlled by a vertical electric field.

    [0018] The display panel further includes a liquid crystal molecule layer 3 located between the array substrate 1 and the color filter substrate 2, the liquid crystal molecules in the liquid crystal molecule layer 3 have certain initial alignment direction, wherein as shown in Fig. 2, the liquid crystal molecules at the central area of the liquid crystal molecule layer 3 have a horizontal initial alignment direction, and the liquid crystal molecules at the peripheral area of the liquid crystal molecule layer 3 have an initial alignment direction which is progressively twisted and has an angle difference less than 90°.

    [0019] According to an embodiment of the present invention, as shown in Fig.2, the first alignment film 4 and the third alignment film 5 provide the horizontal initial alignment direction for the liquid crystal molecules at the central area of the liquid crystal molecule layer 3; the second alignment film 6 and the fourth alignment film 7 provide the initial alignment direction which is progressively twisted and has an angle difference less than 90° for the liquid crystal molecules at the peripheral area of the liquid crystal molecule layer 3. As an example, the first alignment film 4 is located at the central area of the array substrate 1, the third alignment film 5 is located at the central area of the color filter substrate 2, the first alignment film 4 and the third alignment film 5 provide horizontal initial alignment direction for the liquid crystal molecules, the second alignment film 6 is located at the peripheral area of the array substrate 1, the fourth alignment film 7 is located at the peripheral area of the color filter substrate 2, the alignment angle difference between the second alignment film 6 and the fourth alignment film 7 is 90°.

    [0020] According to the embodiment of the present invention, the alignment films are provided in two ways to be described below, so that the liquid crystal molecules at the central area of the liquid crystal molecule layer 3 have a horizontal initial alignment direction, and the liquid crystal molecules at the peripheral area of the liquid crystal molecule layer 3 have an initial alignment direction which is progressively twisted and has an angle difference less than 90°.

    [0021] In the first way, the first alignment film 4, the second alignment film 6, the third alignment film 5 and the fourth alignment film 7 are subjected to a rubbing alignment process to provide predetermined initial alignment direction for the liquid crystal molecules of the liquid crystal molecule layer 3. The rubbing directions of the first alignment film 4, the second alignment film 6, the third alignment film 5 and the fourth alignment film 7 may be the same or form certain angle therebetween, as long as the liquid crystal molecules at the central area of the liquid crystal molecule layer 3 have a horizontal initial alignment direction, and the liquid crystal molecules at the peripheral area of the liquid crystal molecule layer 3 have an initial alignment direction which is progressively twisted and has an angle difference less than 90°. The rubbing direction is not limited in the embodiment of the present invention.

    [0022] In the second way, the first alignment film 4, the second alignment film 6, the third alignment film 5 and the fourth alignment film 7 are subjected to a photo-alignment process to provide predetermined initial alignment direction for the liquid crystal molecules of the liquid crystal molecule layer 3. Specifically, the liquid crystal molecule layer 3 comprises liquid crystal molecules and photosensitive groups. When forming the liquid crystal molecule layer 3, the liquid crystal molecules and photosensitive groups are dripped onto the array substrate 1 or the color film substrate 2 and exposed to ultraviolet ray, the acting force between the alignment film and photosensitive groups causes the photosensitive groups to be aligned along certain direction, thereby the liquid crystal molecules are also aligned along the same direction by the acting force between the liquid crystal molecules and the photosensitive groups.

    [0023] The expression of "an initial alignment direction which is progressively twisted and has an angle difference less than 90° for the liquid crystal molecules at the peripheral area" refers to that, the liquid crystal molecules at the peripheral area have an initial alignment direction on the side of the array substrate and another initial alignment direction differed by 90° on the side of the color film substrate, the liquid crystal molecules between the two sides are progressively twisted, in other words, the initial alignment direction of the liquid crystal molecules is changed progressively/gradually from one side to the other side, with an angle difference less than 90°.

    [0024] In order to facilitate understanding of the skilled person, a specific display panel as shown in Figures 1-3 is provided in an embodiment of the present invention. The display panel comprises in turn a lower polarizer 8, the array substrate 1, the first alignment film 4, the second alignment film 6, the liquid crystal molecule layer 3, the third alignment film 5, the fourth alignment film 7, the color filter substrate 2 and the upper polarizer 9.

    [0025] The direction of the transmission axis of the lower polarizer 8 is perpendicular to that of the upper polarizer 9.

    [0026] The central area a of the array substrate 1 is provided with thin film transistors 14, the first pixel electrodes 11 and the first common electrode 12, the first pixel electrodes 11 and/or the first common electrode 12 are slit electrodes. The peripheral area of the array substrate 1 is provided with thin film transistors 14 and the plate-shaped second pixel electrodes 13. The thin film transistors 14 on the array substrate 1 may be of bottom gate type or top gate type, which is not limited in the present invention. The array substrate 1 further comprises gate lines and data lines intersected with each other.

    [0027] The central area of the color film substrate 2 is provided with a black matrix 22 and a color filter layer 23, the peripheral area of the color film substrate 2 is provided with the black matrix 22, the color filter layer 23 and a plate-shaped second common electrode 21.

    [0028] The first alignment film 4 and the third alignment film 5 are respectively located at the central area of the array substrate 1 and the central area of the color film substrate 2. The first alignment film 4 and the third alignment film 5 have recesses formed by rubbing alignment, the extending direction (i.e. the direction of rubbing alignment) of the recesses on the first alignment film 4 and the third alignment film 5 is parallel to the transmission axis direction of the lower polarizer 8, so that the liquid crystal molecules at the central area of the liquid crystal molecule layer 3 are arranged with their long axis parallel to the transmission axis direction of the lower polarizer 8, thereby a horizontal initial alignment direction is achieved. The second alignment film 6 and the fourth alignment film 7 are respectively located at the peripheral area of the array substrate 1 and the peripheral area of the color film substrate 2. The second alignment film 6 and the fourth alignment film 7 also have recesses formed by rubbing alignment, the extending direction of the recess on the second alignment film 6 is parallel to the transmission axis direction of the lower polarizer 8, the extending direction of the recess on the fourth alignment film 7 is parallel to the transmission axis direction of the upper polarizer 9. The second alignment film 6 causes the liquid crystal molecules close to the second alignment film 6 to be arranged with their long axis parallel to the transmission axis direction of the lower polarizer 8, the fourth alignment film 7 causes the liquid crystal molecules close to the fourth alignment film 7 to be arranged with their long axis parallel to the transmission axis direction of the upper polarizer 9, so that the liquid crystal molecules at the peripheral area of the liquid crystal molecule layer 3 have an initial alignment direction which is progressively twisted and has an angle difference less than 90°.

    [0029] For the central area a of the display panel having the above structure, after the light passes through the lower polarizer 8, since the first alignment film 4 and the third alignment film 5 cause the liquid crystal molecules at the central area of the liquid crystal molecule layer 3 to be arranged with their long axis parallel to the transmission axis direction of the lower polarizer 8, while the transmission axis direction of the lower polarizer 8 is perpendicular to that of the upper polarizer 9. Therefore, as shown in Figs. 2-3, when no electric field is applied between the first pixel electrodes 11 and the first common electrode 12, light cannot pass through the upper polarizer 9, so that the central area a of the display panel is normally black. Also, as shown in Fig. 1, when an electric field is applied between the first pixel electrodes 11 and the first common electrode 12, the liquid crystal molecules are deflected progressively from the lower polarizer 8 to the upper polarizer 9 to have their long axis parallel to the transmission axis direction of the upper polarizer 9, therefore light can pass through the upper polarizer 9.

    [0030] For the peripheral area b of the display panel having the above structure, after the light passes through the lower polarizer 8, since the second alignment film 6 causes the liquid crystal molecules close to the second alignment film 6 to be arranged with their long axis parallel to the transmission axis direction of the lower polarizer 8, the fourth alignment film 7 causes the liquid crystal molecules close to the fourth alignment film 7 to be arranged with their long axis parallel to the transmission axis direction of the upper polarizer 9, and the transmission axis direction of the lower polarizer 8 is perpendicular to that of the upper polarizer 9. Therefore, as shown in Fig. 2, when no electric field is applied between the second pixel electrodes 13 and the second common electrode 21, light can pass through the upper polarizer 9, and the peripheral area b of the display panel is normally white.

    [0031] As shown in Figs. 1 and 3, when an electric field is applied between the second pixel electrodes 13 and the second common electrode 21, the liquid crystal molecules at the peripheral area of the liquid crystal molecule layer 3 will be arranged with their long axis parallel to the direction of the electric field, that is, arranged along a direction perpendicular to the array substrate 1 and the color filter substrate 2, therefore light cannot pass through the upper polarizer 9, and the peripheral area b of the display panel is in a dark state.

    [0032] From above, the dark state of the peripheral area b of the display panel having above structure is controlled by electric field and will not be influenced by external forces, thereby the display panel can be prevented from light leakage.

    [0033] Note that the central area a and the peripheral area b of the display panel may be controlled by a single drive circuit, or by two drive circuits respectively. As an example, when the central area a and the peripheral area b of the display panel are controlled by a single drive circuit, a connection point may be provided in the display panel for connecting the first common electrode 12 on the array substrate 1 and the second common electrode 21 on the color film substrate 2, thereby a same voltage is applied to both the first common electrode 12 and the second common electrode 21.

    Second Embodiment



    [0034] An embodiment of the present invention provides a method for fabricating a display panel comprising the steps shown in Fig. 4:

    step S401, forming an array substrate, wherein the central area of the array substrate is provided with the first pixel electrodes and the first common electrode, the first pixel electrodes and/or the first common electrode are slit electrodes, the peripheral area of the array substrate is provided with the second pixel electrodes;

    step S402, forming a color filter substrate, wherein the peripheral area of the color filter substrate is provided with a second common electrode, the second pixel electrodes and the second common electrode are plate-shaped electrodes.



    [0035] Note that the sequence of forming the structures at the central area of the array substrate and the structures at the peripheral area of the array substrate is not limited in the fabricating method. Persons skilled in the art may make their choice depending on practical requirement.

    [0036] Embodiments of the present invention provides a method for fabricating a display panel, the method comprises forming an array substrate, wherein the central area of the array substrate is provided with the first pixel electrodes and the first common electrode, the first pixel electrodes and/or the first common electrode are slit electrodes, the peripheral area of the array substrate is provided with the second pixel electrodes; and forming a color filter substrate, wherein the peripheral area of the color filter substrate is provided with a second common electrode, the second pixel electrodes and/or the second common electrode are plate-shaped electrodes, so that the formed display panel has a dark state of the peripheral area which is controlled by electric field and will not be influenced by external forces, thereby the display panel can be prevented from light leakage.

    [0037] In order to provide certain initial alignment direction for the liquid crystal molecules in the liquid crystal molecule layer 3, the fabricating method of the display panel also comprises: forming a first alignment film 4 on the central area of the array substrate 1; forming a second alignment film 6 on the peripheral area of the array substrate 1; forming a third alignment film 5 on the central area of the color film substrate 2; forming a fourth alignment film 7 on the peripheral area of the color film substrate 2; wherein the first alignment film 4 and the third alignment film 5 provide the horizontal initial alignment direction for the liquid crystal molecules at the central area of the liquid crystal molecule layer 3; the alignment angle difference between the second alignment film 6 and the fourth alignment film 7 is 90°.

    [0038] Also note that, the sequence for forming the respective alignment films is not limited in the fabricating method. Persons skilled in the art may make their choice depending on practical requirement.

    [0039] Further, according to an embodiment of the present invention, the alignment films are fabricated in two ways to be described below, so that the liquid crystal molecules at the central area of the liquid crystal molecule layer 3 are caused to have a horizontal initial alignment direction by the first alignment film 4 and the third alignment film 5, and the liquid crystal molecules at the peripheral area of the liquid crystal molecule layer 3 are caused to have an initial alignment direction which is progressively twisted and has an angle difference less than 90° by the second alignment film 6 and the fourth alignment film 7.

    [0040] In the first way, the first alignment film 4 and the third alignment film 5 are formed on the central area of the array substrate 1, the second alignment film 6 and the fourth alignment film 7 are formed on the peripheral area of the array substrate 1, then the alignment films are subjected to a rubbing alignment process. The rubbing directions of the first alignment film 4, the second alignment film 6, the third alignment film 5 and the fourth alignment film 7 may be the same or form certain angle therebetween, as long as the liquid crystal molecules at the central area of the liquid crystal molecule layer 3 have a horizontal initial alignment direction, and the liquid crystal molecules at the peripheral area of the liquid crystal molecule layer 3 have an initial alignment direction which is progressively twisted and has an angle difference less than 90°. The rubbing direction is not specific limited in the embodiment of the present invention.

    [0041] In the second way, photosensitive groups and the liquid crystal molecules are dripped onto the central area of the array substrate 1 or the central area of the color film substrate 2 and exposed to ultraviolet ray, so as to provide horizontal initial alignment direction for the liquid crystal molecules at the central area of the liquid crystal molecule layer 3;
    photosensitive groups and the liquid crystal molecules are dripped onto the peripheral area of the array substrate 1 or the peripheral area of the color film substrate 2 and exposed to ultraviolet ray, so as to provide an initial alignment direction which is progressively twisted and has an angle difference less than 90° for the liquid crystal molecules at the peripheral area.

    [0042] The foregoing embodiments are only specific embodiments of the present invention, the protective scope of the present invention is not limited thereto. The scope of the present invention is defined by the claims.


    Claims

    1. A liquid crystal display panel comprising a central area (a) and a peripheral area (b) surrounding the central area (a), wherein the display mode of the central area (a) is a display mode controlled by a horizontal electric field or multi-dimensional electric field, the display mode of the peripheral area (b) is a display mode controlled by a vertical electric field, wherein the peripheral area is in a dark state under the application of the vertical electric field.
     
    2. The display panel according to claim 1, wherein the display panel includes an array substrate (1) and a color filter substrate disposed opposite to each other, the central area (a) of the array substrate (1) is provided with first pixel electrodes (11) and a first common electrode (12), the first pixel electrodes (11) and/or the first common electrode (12) are slit electrodes; the peripheral area (b) of the array substrate (1) is provided with second pixel electrodes (13), the peripheral area (b) of the color filter substrate is provided with a second common electrode (21), the second pixel electrodes (13) and the second common electrode (21) are plate-shaped electrodes.
     
    3. The display panel according to claim 2, further comprises a liquid crystal molecule layer located between the array substrate (1) and the color filter substrate (2), wherein the liquid crystal molecules at the central area (a) have a horizontal initial alignment direction, and the liquid crystal molecules at the peripheral area (b) have an initial alignment direction which is progressively twisted and has an angle difference less than 90°.
     
    4. The display panel according to claim 3, wherein a first alignment film (4) and a third alignment film (5) provide the horizontal initial alignment direction for the liquid crystal molecules at the central area (a); the alignment angle difference between a second and a fourth alignment films (6 ,7) is 90°.
     
    5. The display panel according to claim 4, wherein the first alignment film (4) is located at the central area (a) of the array substrate, the third alignment film (5) is located at the central area (a) of the color filter substrate (2), the first alignment film (4) and the third alignment film (5) provide horizontal initial alignment direction for the liquid crystal molecules, the second alignment film (6) is located at the peripheral area (b) of the array substrate (1), the fourth alignment film (7) is located at the peripheral area (b) of the color filter substrate (2), the second alignment film (6) and the fourth alignment film (7) provide the initial alignment direction which is progressively twisted and has an angle difference less than 90° for the liquid crystal molecules.
     
    6. The display panel according to claim 5, wherein the first alignment film (4), the second alignment film (6), the third alignment film (5) and the fourth alignment film (7) are formed by rubbing alignment process to achieve predetermined initial alignment direction.
     
    7. The display panel according to claim 5, wherein the first alignment film (4), the second alignment film (6), the third alignment film (5) and the fourth alignment film (7) are formed by photo-alignment process to achieve predetermined initial orientation.
     
    8. The display panel according to claim 1, wherein the central area (a) is located within or corresponds to the display area of the display panel.
     
    9. A method for fabricating a liquid crystal display panel, comprising:

    forming an array substrate (1), wherein the central area (a) of the array substrate (1) is provided with first pixel electrodes (11) and a first common electrode (12), the first pixel electrodes (11) and/or the first common electrode (12) are slit electrodes, the peripheral area (b) of the array substrate (1) is provided with the second pixel electrodes (13);

    forming a color filter substrate (2), wherein the peripheral area (b) of the color filter substrate (2) is provided with a second common electrode (21), the second pixel electrodes (13) and the second common electrode (21) are plate-shaped electrodes;

    wherein the display mode of the central area (a) is a display mode controlled by a horizontal electric field or multi-dimensional electric field applied by the first pixel electrodes (11) and the first common electrode (12), the display mode of the peripheral area (b) is a display mode controlled by a vertical electric field applied by the second pixel electrodes (13) and the second common electrode (21), wherein the peripheral area is in a dark state under the application of the vertical electric field.


     
    10. The method according to claim 9, further comprises:

    forming a first alignment film (4) on the central area (a) of the array substrate (1);

    forming a second alignment film (6) on the peripheral area (b) of the array substrate (1);

    forming a third alignment film (5) on the central area (a) of the color film substrate (2);

    forming a fourth alignment film (7) on the peripheral area (b) of the color film substrate (2);

    wherein the first alignment film (4) and the third alignment film (5) provide the horizontal initial alignment direction for the liquid crystal molecules at the central area; the alignment angle difference between the second and the fourth alignment films (6,7) is 90°.


     
    11. The method according to claim 10, wherein the steps of forming the first alignment film (4), the second alignment film (6), the third alignment film (5) and the fourth alignment film (7) comprise rubbing alignment process for alignment.
     
    12. The method according to claim 10, further comprises:

    dripping photosensitive groups and the liquid crystal molecules onto the central area (a) of the array substrate (1) or the central area (a) of the color film substrate (2), exposing to ultraviolet ray, so as to provide horizontal initial alignment direction for the liquid crystal molecules at the central area;

    dripping photosensitive groups and the liquid crystal molecules onto the peripheral area (b) of the array substrate (1) or the peripheral area (b) of the color film substrate (2), exposing to ultraviolet ray, so as to provide an initial alignment direction which is progressively twisted and has an angle difference less than 90° for the liquid crystal molecules at the peripheral area.


     


    Ansprüche

    1. Flüssigkristallanzeigetafel mit einem zentralen Bereich (a) und einem peripheren Bereich (b), der den zentralen Bereich (a) umgibt, wobei der Anzeigemodus des zentralen Bereichs (a) ein Anzeigemodus ist, der durch ein horizontales elektrisches Feld oder ein mehrdimensionales elektrisches Feld gesteuert wird, wobei der Anzeigemodus des peripheren Bereichs (b) ein Anzeigemodus ist, der durch ein vertikales elektrisches Feld gesteuert wird, wobei sich der periphere Bereich unter dem Anlegen des vertikalen elektrischen Feldes in einem dunklen Zustand befindet.
     
    2. Anzeigetafel nach Anspruch 1, wobei die Anzeigetafel ein Array-Substrat (1) und ein Farbfiltersubstrat enthält, die einander gegenüberliegend angeordnet sind, der zentrale Bereich (a) des Array-Substrats (1) mit ersten Pixelelektroden (11) und einer ersten gemeinsamen Elektrode (12) versehen ist, die ersten Pixelelektroden (11) und/oder die erste gemeinsame Elektrode (12) Schlitzelektroden sind; der periphere Bereich (b) des Array-Substrats (1) mit zweiten Pixelelektroden (13) versehen ist, der periphere Bereich (b) des Farbfiltersubstrats mit einer zweiten gemeinsamen Elektrode (21) versehen ist, die zweiten Pixelelektroden (13) und die zweite gemeinsame Elektrode (21) plattenförmige Elektroden sind.
     
    3. Anzeigetafel nach Anspruch 2 ferner mit einer Flüssigkristallmolekülschicht, die zwischen dem Array-Substrat (1) und dem Farbfiltersubstrat (2) angeordnet ist, wobei die Flüssigkristallmoleküle in dem zentralen Bereich (a) eine horizontale Anfangsausrichtungsrichtung haben und die Flüssigkristallmoleküle in dem peripheren Bereich (b) eine Anfangsausrichtungsrichtung haben, die zunehmend verdreht ist und eine Winkeldifferenz von weniger als 90° aufweist.
     
    4. Anzeigetafel nach Anspruch 3, wobei ein erster Ausrichtungsfilm (4) und ein dritter Ausrichtungsfilm (5) die horizontale Anfangsausrichtungsrichtung für die Flüssigkristallmoleküle in dem zentralen Bereich (a) vorsehen; die Ausrichtungswinkeldifferenz zwischen einem zweiten und einem vierten Ausrichtungsfilm (6, 7) 90° beträgt.
     
    5. Anzeigetafel nach Anspruch 4, wobei der erste Ausrichtungsfilm (4) in dem zentralen Bereich (a) des Array-Substrats angeordnet ist, der dritte Ausrichtungsfilm (5) in dem zentralen Bereich (a) des Farbfiltersubstrats (2) angeordnet ist, der erste Ausrichtungsfilm (4) und der dritte Ausrichtungsfilm (5) die horizontale Anfangsausrichtungsrichtung für die Flüssigkristallmoleküle vorsehen, der zweite Ausrichtungsfilm (6) an dem peripheren Bereich (b) des Array-Substrats (1) angeordnet ist, der vierte Ausrichtungsfilm (7) an dem peripheren Bereich (b) des Farbfiltersubstrats (2) angeordnet ist, der zweite Ausrichtungsfilm (6) und der vierte Ausrichtungsfilm (7) die Anfangsausrichtungsrichtung vorsehen, die zunehmend verdreht ist und eine Winkeldifferenz von weniger als 90° für die Flüssigkristallmoleküle aufweist.
     
    6. Anzeigetafel nach Anspruch 5, wobei der erste Ausrichtungsfilm (4), der zweite Ausrichtungsfilm (6), der dritte Ausrichtungsfilm (5) und der vierte Ausrichtungsfilm (7) durch einen Reibungsausrichtungsvorgang gebildet werden, um eine vorbestimmte Anfangsausrichtungsrichtung zu erreichen.
     
    7. Anzeigetafel nach Anspruch 5, wobei der erste Ausrichtungsfilm (4), der zweite Ausrichtungsfilm (6), der dritte Ausrichtungsfilm (5) und der vierte Ausrichtungsfilm (7) durch einen Photoausrichtungsvorgang gebildet werden, um eine vorbestimmte Anfangsausrichtung zu erreichen.
     
    8. Anzeigetafel nach Anspruch 1, wobei sich der zentrale Bereich (a) innerhalb des Anzeigebereichs der Anzeigetafel befindet oder diesem entspricht.
     
    9. Verfahren zur Herstellung einer Flüssigkristallanzeigetafel, umfassend:

    Bilden eines Array-Substrats (1), wobei der zentrale Bereich (a) des Array-Substrats (1) mit ersten Pixelelektroden (11) und einer ersten gemeinsamen Elektrode (12) versehen ist, die ersten Pixelelektroden (11) und/oder die erste gemeinsame Elektrode (12) Schlitzelektroden sind, der periphere Bereich (b) des Array-Substrats (1) mit den zweiten Pixelelektroden (13) versehen ist;

    Bilden eines Farbfiltersubstrats (2), wobei der periphere Bereich (b) des Farbfiltersubstrats (2) mit einer zweiten gemeinsamen Elektrode (21) versehen ist, die zweiten Pixelelektroden (13) und die zweite gemeinsame Elektrode (21) plattenförmige Elektroden sind;

    wobei der Anzeigemodus des zentralen Bereichs (a) ein Anzeigemodus ist, der durch ein horizontales elektrisches Feld oder ein mehrdimensionales elektrisches Feld gesteuert wird, das durch die ersten Pixelelektroden (11) und die erste gemeinsame Elektrode (12) angelegt wird, der Anzeigemodus des peripheren Bereichs (b) ein Anzeigemodus ist, der durch ein vertikales elektrisches Feld gesteuert wird, das durch die zweiten Pixelelektroden (13) und die zweite gemeinsame Elektrode (21) angelegt wird, wobei sich der periphere Bereich unter dem Anlegen des vertikalen elektrischen Feldes in einem dunklen Zustand befindet.


     
    10. Verfahren nach Anspruch 9, ferner umfassend:

    Bilden eines ersten Ausrichtungsfilms (4) auf dem zentralen Bereich (a) des Array-Substrats (1);

    Bilden eines zweiten Ausrichtungsfilms (6) auf dem peripheren Bereich (b) des Array-Substrats (1);

    Bilden eines dritten Ausrichtungsfilms (5) auf dem zentralen Bereich (a) des Farbfilmsubstrats (2);

    Bilden eines vierten Ausrichtungsfilms (7) auf dem peripheren Bereich (b) des Farbfilmsubstrats (2);

    wobei der erste Ausrichtungsfilm (4) und der dritte Ausrichtungsfilm (5) die horizontale Anfangsausrichtungsrichtung für die Flüssigkristallmoleküle in dem zentralen Bereich vorsehen; die Ausrichtungswinkeldifferenz zwischen dem zweiten und dem vierten Ausrichtungsfilm (6, 7) 90° beträgt.


     
    11. Verfahren nach Anspruch 10, wobei die Schritte des Bildens des ersten Ausrichtungsfilms (4), des zweiten Ausrichtungsfilms (6), des dritten Ausrichtungsfilms (5) und des vierten Ausrichtungsfilms (7) einen Reibungsausrichtungsvorgang zur Ausrichtung umfassen.
     
    12. Verfahren nach Anspruch 10, ferner umfassend:

    Auftropfen von lichtempfindlichen Gruppen und den Flüssigkristallmolekülen auf den zentralen Bereich (a) des Array-Substrats (1) oder den zentralen Bereich (a) des Farbfilmsubstrats (2), Belichten mit ultravioletter Strahlung, um eine horizontale Anfangsausrichtungsrichtung der Flüssigkristallmoleküle in dem zentralen Bereich vorzusehen;

    Auftropfen von lichtempfindlichen Gruppen und der Flüssigkristallmoleküle auf den peripheren Bereich (b) des Array-Substrats (1) oder den peripheren Bereich (b) des Farbfilmsubstrats (2), Belichten mit ultravioletter Strahlung, um so eine Anfangsausrichtungsrichtung vorzusehen, die zunehmend verdreht ist und einer Winkeldifferenz von weniger als 90° für die Flüssigkristallmoleküle in dem peripheren Bereich aufweist.


     


    Revendications

    1. Panneau d'affichage à cristaux liquides comprenant une zone centrale (a) et une zone périphérique (b) entourant la zone centrale (a), dans lequel le mode d'affichage de la zone centrale (a) est un mode d'affichage contrôlé par un champ électrique horizontal ou un champ électrique multidimensionnel, le mode d'affichage de la zone périphérique (b) est un mode d'affichage commandé par un champ électrique vertical, dans lequel la zone périphérique est dans un état sombre sous l'application du champ électrique vertical.
     
    2. Panneau d'affichage selon la revendication 1, dans lequel le panneau d'affichage comprend un substrat de matrice (1) et un substrat de filtre de couleur disposés en face l'un de l'autre, la zone centrale (a) du substrat de matrice (1) est pourvue de premières électrodes de pixel (11) et une première électrode commune (12), les premières électrodes de pixel (11) et/ou la première électrode commune (12) sont des électrodes à fente ; la zone périphérique (b) du substrat de matrice (1) est pourvue de deuxièmes électrodes de pixel (13), la zone périphérique (b) du substrat de filtre de couleur est pourvue d'une deuxième électrode commune (21), les deuxièmes électrodes de pixel (13) et la deuxième électrode commune (21) sont des électrodes en forme de plaque.
     
    3. Panneau d'affichage selon la revendication 2, comprenant en outre une couche de molécules de cristaux liquides située entre le substrat de matrice (1) et le substrat de filtre de couleur (2), dans lequel les molécules de cristaux liquides au niveau de la zone centrale (a) ont une direction d'alignement initiale horizontale, et les molécules de cristaux liquides au niveau de la zone périphérique (b) ont une direction d'alignement initiale qui est progressivement tordue et a une différence d'angle inférieure à 90°.
     
    4. Panneau d'affichage selon la revendication 3, dans lequel un premier film d'alignement (4) et un troisième film d'alignement (5) fournissent la direction d'alignement initiale horizontale pour les molécules de cristaux liquides au niveau de la zone centrale (a) ; la différence d'angle d'alignement entre un deuxième et un quatrième film d'alignement (6, 7) est de 90°.
     
    5. Panneau d'affichage selon la revendication 4, dans lequel le premier film d'alignement (4) est situé au niveau de la zone centrale (a) du substrat de matrice, le troisième film d'alignement (5) est situé au niveau de la zone centrale (a) du substrat de filtre de couleur (2), le premier film d'alignement (4) et le troisième film d'alignement (5) fournissent une direction d'alignement initiale horizontale pour les molécules de cristaux liquides, le deuxième film d'alignement (6) est situé au niveau de la zone périphérique (b) du substrat de matrice (1), le quatrième film d'alignement (7) est situé au niveau de la zone périphérique (b) du substrat de filtre de couleur (2), le deuxième film d'alignement (6) et le quatrième film d'alignement (7) fournissent la direction d'alignement initiale qui est progressivement tordue et présente une différence d'angle inférieure à 90° pour les molécules de cristaux liquides.
     
    6. Panneau d'affichage selon la revendication 5, dans lequel le premier film d'alignement (4), le deuxième film d'alignement (6), le troisième film d'alignement (5) et le quatrième film d'alignement (7) sont formés par un processus d'alignement par frottement pour atteindre une direction d'alignement initiale prédéterminée.
     
    7. Panneau d'affichage selon la revendication 5, dans lequel le premier film d'alignement (4), le deuxième film d'alignement (6), le troisième film d'alignement (5) et le quatrième film d'alignement (7) sont formés par un processus de photo-alignement pour atteindre une orientation initiale prédéterminée.
     
    8. Panneau d'affichage selon la revendication 1, dans lequel la zone centrale (a) est située à l'intérieur ou correspond à la zone d'affichage du panneau d'affichage.
     
    9. Procédé de fabrication d'un panneau d'affichage à cristaux liquides, comprenant les étapes consistant à :

    former un substrat de réseau (1), dans lequel la zone centrale (a) du substrat de réseau (1) est pourvue de premières électrodes de pixel (11) et d'une première électrode commune (12), les premières électrodes de pixel (11) et/ou la première électrode commune (12) sont des électrodes à fente, la zone périphérique (b) du substrat de réseau (1) est pourvue des deuxièmes électrodes de pixel (13) ;

    former un substrat de filtre de couleur (2), dans lequel la zone périphérique (b) du substrat de filtre de couleur (2) est pourvue d'une deuxième électrode commune (21), les deuxièmes électrodes de pixel (13) et la deuxième électrode commune (21) sont des électrodes en forme de plaque ;

    dans lequel le mode d'affichage de la zone centrale (a) est un mode d'affichage commandé par un champ électrique horizontal ou un champ électrique multidimensionnel appliqué par les premières électrodes de pixel (11) et la première électrode commune (12), le mode d'affichage de la zone périphérique (b) est un mode d'affichage commandé par un champ électrique vertical appliqué par les deuxièmes électrodes de pixel (13) et la deuxième électrode commune (21), dans lequel la zone périphérique est dans un état sombre sous l'application du champ électrique vertical.


     
    10. Procédé selon la revendication 9, comprenant en outre les étapes consistant à :

    former un premier film d'alignement (4) sur la zone centrale (a) du substrat de réseau (1) ;

    former un deuxième film d'alignement (6) sur la zone périphérique (b) du substrat de réseau (1) ;

    former un troisième film d'alignement (5) sur la zone centrale (a) du substrat de film de couleur (2) ;

    former un quatrième film d'alignement (7) sur la zone périphérique (b) du substrat de film de couleur (2) ;

    dans lequel le premier film d'alignement (4) et le troisième film d'alignement (5) fournissent la direction d'alignement initiale horizontale pour les molécules de cristaux liquides au niveau de la zone centrale ; la différence d'angle d'alignement entre les deuxième et quatrième films d'alignement (6,7) est de 90°.


     
    11. Procédé selon la revendication 10, dans lequel les étapes de formation du premier film d'alignement (4), du deuxième film d'alignement (6), du troisième film d'alignement (5) et du quatrième film d'alignement (7) comprennent un processus d'alignement par frottement pour l'alignement.
     
    12. Procédé selon la revendication 10, comprenant en outre les étapes consistant à :

    égoutter des groupes photosensibles et des molécules de cristaux liquides sur la zone centrale (a) du substrat de matrice (1) ou la zone centrale (a) du substrat de film de couleur (2), exposant aux rayons ultraviolets, de manière à fournir une direction d'alignement initiale horizontale des molécules de cristaux liquides au niveau de la zone centrale ;

    égoutter des groupes photosensibles et des molécules de cristaux liquides sur la zone périphérique (b) du substrat de réseau (1) ou la zone périphérique (b) du substrat de film de couleur (2), exposant aux rayons ultraviolets, de manière à fournir une direction alignement initiale qui est progressivement tordue et présente une différence d'angle inférieure à 90° pour les molécules de cristaux liquides au niveau de la zone périphérique.


     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description