(19)
(11)EP 3 012 819 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
29.04.2020 Bulletin 2020/18

(21)Application number: 13854235.2

(22)Date of filing:  12.12.2013
(51)International Patent Classification (IPC): 
G09F 9/30(2006.01)
G06F 1/16(2006.01)
H04N 5/64(2006.01)
(86)International application number:
PCT/CN2013/089309
(87)International publication number:
WO 2014/201820 (24.12.2014 Gazette  2014/52)

(54)

DISPLAY DEVICE

ANZEIGEVORRICHTUNG

DISPOSITIF D'AFFICHAGE


(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: 17.06.2013 CN 201310239550

(43)Date of publication of application:
27.04.2016 Bulletin 2016/17

(73)Proprietors:
  • BOE Technology Group Co., Ltd.
    Beijing 100015 (CN)
  • Beijing Boe Vision-Electronic Technology Co., Ltd.
    Beijing 100176 (CN)

(72)Inventors:
  • HE, Jianmin
    Beijing 100176 (CN)
  • CHEN, Qin
    Beijing 100176 (CN)
  • NIU, Enmin
    Beijing 100176 (CN)

(74)Representative: Klunker IP Patentanwälte PartG mbB 
Destouchesstraße 68
80796 München
80796 München (DE)


(56)References cited: : 
EP-A2- 1 347 324
CN-U- 201 533 360
CN-U- 202 889 502
JP-A- H10 243 481
JP-A- 2003 304 206
JP-A- 2004 274 407
EP-A2- 2 584 578
CN-U- 202 889 502
JP-A- H10 243 481
JP-A- 2001 148 666
JP-A- 2003 304 206
JP-A- 2004 274 407
  
      
    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

    TECHNICAL FIELD



    [0001] The present invention relates to the technical field of a display device, and more particularly, relate to a display device.

    BACKGROUND



    [0002] Remote control technique is a technique commonly used in current household appliances. Among various remote control techniques, infrared control technology is a common one, for example, a remote controller used in a TV set is an infrared remote controller. An infrared control signal is one of optical signals and is directional. Thus, the infrared remote controller should be kept in a line with an infrared receiver when in use.

    [0003] JP 2004 274407 A discloses an infrared remote control signal light-receiving device for a TV set, which has a light guide member wedged into the frame of the TV set, a receiving end at a display side of the display screen and a light exiting surface.

    [0004] CN 202 889 502 U disclosed a hidden remote receiving structure for a flat panel TV set, which comprises a front case of the flat panel TV set, a rear case of the flat panel TV set, and a display panel disposed between the front case and the rear case, wherein a remote receiving device is positioned between the rear case and the display panel and disposed adjacent a side edge of the rear case, a light guide post is disposed at the side edge of the rear case and the display panel, one end of the light guide post passes through and is secured in the front case, the other end of the light guide post is bent toward to the remote receiving device by 45 degree and disposed in a same axis direction as a receiving module of the remote receiving device.

    [0005] JP 2003 304206 A discloses a light guide member with a hollow portion as a path for infrared light for suppressing attenuation of the infrared light due to absorption.

    [0006] Figs. 1 and 2 illustrate display dives of conventional techniques, wherein Fig. 1 is a schematic structural diagram of a display device of conventional techniques and Fig. 2 is a schematic structural diagram of the display device as illustrated in Fig. 1 taken in direction A. The display device comprises a display screen 01, an opaque frame 02 disposed around periphery of the display screen 01, a light guide member 03 disposed at the bottom of the opaque frame 02, the light guide member 03 having a thickness the same as the thickness of the opaque frame, and an infrared receiver 04 disposed corresponding to a incident face 031 of the light guide member 03. Of course, there is a display device with another structure wherein the light guide member 03 is disposed in the opaque frame, as illustrated in Fig. 3.

    [0007] For display device with such two structures, when in use, the infrared control signal transmitted by the infrared remote controller is transmitted to the infrared receiver 04 through the light guide member 03 such that the infrared receiver 04 can receive the infrared control signal transmitted by the infrared remote controller.

    [0008] The inventor of the present application found that, the display devices with such two structures have a projection at the bottom frame or have an excessively wide frame, which obstructs the frame of the display device to get slimmer.

    SUMMARY



    [0009] It is an object of the present invention to provide a display device, by which the display device does not need to have an excessively wide bottom frame.

    [0010] The object is solved by the features of independent claim 1. Further embodiments are defined in the dependent claims.

    [0011] In the display device provided by the present invention, the transmission direction of the infrared control signal is changed by disposing a light guide member such that the infrared receiver can also receive infrared remote control signal in the situation that position of the infrared receiver is shifted backwards (i.e., shifted towards the back of the display device). Furthermore, one person only see the narrower portion of the light guide member when viewing the display screen as the thickness of the receiving end in a direction perpendicular to the frame is narrower than the thickness of the light exiting surface of the light guide member in the direction. Thus, the display device provided by the present invention improves display effect of the narrower frame of the display device.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0012] In order to clearly illustrate the present invention, the drawings of the embodiments will be briefly described in the following; the described drawings are only related to some embodiments of the invention and thus are not limitative of the invention. In the following, "embodiments" are to be understood as falling under the scope of the claims, whilst "examples for better understanding the invention" are not falling under the scope of the claims.

    Fig. 1 is a schematic structure diagram of a display device provided by conventional technology;

    Fig. 2 is a schematic structure diagram of the display device illustrated in Fig. 1 and taken in direction A;

    Fig. 3 is a schematic structure diagram of another display device provided in conventional technology;

    Fig. 4 is a schematic structure diagram of a display device according to an embodiment of the present invention;

    Fig. 5 is a schematic structure diagram of another display device provided as example for better understanding the invention; and

    Fig. 6 is a diagram illustrating transmission path of light in the receiving end of a light guide member of the display device provided according to the embodiment of the present invention.


    DETAILED DESCRIPTION



    [0013] In order to make objects, technical details and advantages of the present invention apparent, an embodiment of the invention as well as an example for better understanding the invention will be described in a clearly and fully understandable way in connection with the drawings

    [0014] Please refer to Fig. 4, which is a schematic structure diagram of a display device provided by an embodiment of the present invention. The display device comprises a display screen 2 and a frame 1 disposed around periphery of the display screen 2, and also comprises an infrared receiver 3 and a light guide member 4.

    [0015] The light guide member has a securing surface 40, and is secured to the frame 1 by means of the securing surface 40. The light guide member 4 further has a receiving end 42 and a light exiting surface, the receiving end formed at the display side of the display screen, and a width of the receiving end in a direction perpendicular to the frame to which it is secured is narrower than a width of the light exiting surface in the direction.

    [0016] In practice, the light guide member is typically placed at the lower surface of the frame 1. However, the light guide member can also be disposed at other surface of the frame, for example, the top surface or the side surface. The lower surface of the frame 1 refers to the lower surface of the frame 1 when the display device is placed as illustrated in Fig. 4.

    [0017] The receiving end of the light guide member according to the embodiment comprises a first receiving surface and a second receiving surface, the first receiving surface intersects with the securing surface of the light guide member and being parallel to the display side of the display device, the second receiving surface intersecting with the first receiving surface and being opposite to the securing surface.

    [0018] It is explained that, when the receiving end 42 is placed at a position as illustrated in Fig. 4, a surface of the receiving end 42 facing human's eyes is the first receiving surface of the receiving end 42, the light guide member is secured to the frame through the securing surface, and a surface intersecting with the first receiving surface and opposite to the securing surface is the second receiving surface.

    [0019] In the display device provided by the embodiment, the first receiving surface and the second receiving surface of the receiving end 42 of the light guide member 4 receive infrared control signal and change its transmission direction, such that position of the infrared receiver 3 can be shifted backwards (i.e., towards the back side of the display device) in the situation that the infrared receiver 3 can receive the infrared control signal. As the width of the receiving end in the direction perpendicular to the frame to which the receiving end is secured is narrower than the width of the light exiting surface in the direction, only the narrower portion of the light guide member 4 (i.e., the first receiving surface of the receiving end 42) can be seen from the front side of the display screen.

    [0020] Therefore, the display device provided by the embodiment improves display effect of the narrow frame of a display device.

    [0021] Furthermore, in order to facilitate the infrared receiver 3 to receive signals, the receiving end 42 receives infrared control signals and is capable of changing the transmission direction of the infrared control signals so as to transmit them to the infrared receiver 3. And moreover, a distance between the second receiving surface of the receiving end 42 and the securing surface of the receiving end in a direction perpendicular to the frame to which the receiving end 42 is secured is continuously increased.

    [0022] There are various specific structures for the receiving end 42.

    [0023] Please refer to Fig. 4 again. In the embodiment, the second receiving surface of the receiving end 42 is an arc surface. Of course, the shape of the arc surface is not limited to the curved shape as illustrated in Fig. 4, as long as only the narrowest portion (i.e. the first receiving surface) of the light guide member 4 is seen by human's eyes and the receiving end 42 can transmit the received infrared control signals to the infrared receiver 3.

    [0024] Please refer to Fig. 5, which is a schematic structural diagram of another display device according to an example for better understanding the present invention. In the example, the second receiving surface of the receiving end 42 is a plane, and an included angle between the second receiving surface of the receiving end 42 and the securing surface of the receiving end 42 is in a range of 30° to 70°. For example, the included angle can be 30°, 40°, 50°, 60°, 70° and etc., and will not be elaborated herein.

    [0025] In order to facilitate to understand the transmission path of the light in the receiving end 42, the transmission path of the light in the receiving end 42 will be described hereinafter by taking a display device with the structure illustrated in Fig. 4 as an example and in connection with Fig. 6, which is a diagram illustrating transmission path of light in the receiving end of the light guide member of the first display device provided by embodiments of the present application. At the same time, for purpose of describing the optical path, terms "a first interface", "a second interface" and "a third interface" are introduced hereinafter, corresponding to the second receiving surface 421, the securing surface 422 and the light exiting surface 423, respectively.

    [0026] Please refer to Fig. 6. when infrared light transmitted by the remote controller incidents on the first receiving surface 420 perpendicularly, i.e., the first incident light b as illustrated in Fig. 6, the first incident light b enters the infrared receiver 3 linearly without any refraction or any reflection.

    [0027] When infrared light transmitted by the remote controller incidents on the second receiving surface 421 of the receiving end 42, i.e., a second incident light c as illustrated in Fig. 6, the second incident light c will incident on the second interface (i.e., the securing surface 422) after the first refraction at the first interface (the first receiving surface 421), and will incident on the first interface (i.e., the second receiving surface 421) again after the first reflection at the second interface, and then incident on the third interface (i.e., the light exiting surface 423) after the second reflection at the first interface (i.e., the second receiving surface 421), and finally incident on the infrared receiver 3 after a second refraction at the third interface (i.e., the light exiting surface 423).

    [0028] In order to improve the efficiency of the infrared light, it is desired that both the first reflection and the second reflection of the second incident light b at the second interface 422 and at the first interface 421 are total reflection so as to improve the efficiency of the infrared light.

    [0029] The total reflection refers to a phenomenon that, when light travels from an optically denser medium (i.e., refraction index of light in the medium is bigger) to an optically thinner medium (i.e., refraction index of light in the medium is smaller), all the light will be reflected to the preceding medium.

    [0030] When the infrared light transmitted by the remote controller is incident on a surface of external medium (such as a surface of the ground or a table and etc.) rather than entering the receiving end 42, that is to say, the light is the third incident light d as illustrated in Fig. 6, the third incident light d will be incident on the first interface (that is the second receiving surface 421) after a first reflection at the surface of the external medium, and then will be incident on the third interface (that is the light exiting surface 423) after a first refraction at the first interface, and finally, will be incident on the infrared receiver 3 after a second refraction at the third interface.

    [0031] Of course, the transmission paths of light are not limited to the three manners as described above as there are various angles of the incident light. However, the principle is that light will be incident on the infrared receiver after reflections and/or refractions in the receiving end (except the perpendicularly incident light). The three transmission paths of light listed here are representative. As for transmission direction of other light incident on the receiving end with other angles, it will not be elaborated here.

    [0032] The light guide member with such structures as described above are made of transparent material in order to facilitate the transmission of light in the member. Further, the transparent material can be glass, resin, polymethyl methacrylate, or plastic. Of course, the transparent material is not limited hereto, and will not be elaborated here. If the light guide member is made of polymethyl methacrylate, which has a refraction index of 1.49, then, light with an incident angle greater than 42.2° will be totally reflected.

    [0033] Optionally, the securing surface of the light guide member is adhered to the lower surface of the frame 1. Alternatively, the light guide member is fixed to the frame 1 by means of a bolt. Of course, the light guide member 4 can be fixed to the frame 1 by means of a fastener and a bayonet, wherein the bayonet is configured on a securing surface of the frame 1 and the fastener is configured on the light guide member 4, or the fastener is configured on a securing surface of the frame 1 and the bayonet is configured on the light guide member 4. The fixing manner between the light guide member 4 and the frame 1 will not be elaborated herein.

    [0034] Optionally, the infrared receiver 3 can be mounted in a groove 41 by means of a bolt. Otherwise, the infrared receiver can be adhered in the groove 41. Of course, the infrared receiver 3 and the groove 41 can also be connected to each other and fixed together by means of a fastener and a bayonet, wherein the bayonet is configured on the infrared receiver 3 and the fastener is configured on the groove 41, or the fastener is configured on the infrared receiver 3 and the bayonet is configured on the groove 41. The fixing manner between the infrared receiver 3 and the groove 41 will not be elaborated herein.

    [0035] The display device according embodiments of the present application can be a liquid crystal TV, and can also be other display device in which the infrared remote control is utilized. It will not be elaborated herein.


    Claims

    1. A display device comprising a display screen (2) and a frame (1) disposed around the display screen (2), the display device further comprising
    an infrared receiver (3); and
    a light guide member (4) having a securing surface (40), the light guide member (4) further comprising a receiving end (42) and a light exiting surface (423), the receiving end (42) formed at a display side of the display screen (2), wherein
    a width of the receiving surface (420) in a direction perpendicular to the frame (1) to which the light guide member (4) is fixed is narrower than a width of the light exiting surface (423) in the direction; and the receiving end (42) receives the infrared control signals and changes transmission direction thereof so as to transmit the signals to the infrared receiver (3), and a distance between the securing surface (40) of the light guide member (4) through which the light guide member (4) is secured to the frame (1) and a surface of the light guide member (4) opposite to the securing surface (40) is continuously increased in a direction from the receiving end (42) to the light exiting surface (423), characterised in that the light guide member (4) is secured to the frame (1) through the securing surface (40);
    the receiving end (42) has a first receiving surface (420) and a second receiving surface (421) for receiving infrared control signals, the first receiving surface (420) being parallel to the display side of the display screen (2), and the second receiving surface (421) intersecting with the first receiving surface (420) and opposite to the securing surface (40); and
    a lower surface of the receiving end (42) is an arc surface.
     
    2. The display device according to claim 1, wherein the light guide member (4) has a groove (41) for receiving an infrared receiver (3) which is mounted facing to the light exiting surface (423) of the light guide member (4).
     
    3. The display device according to any one of claims 1 to 2, wherein a lower surface of the receiving end (42) is a plane, and an included angle between the lower surface of the receiving end (42) and an upper surface of the receiving end (42) is in a range of 30° to 70°.
     
    4. The display device according to any one of claims 1 to 3, wherein the light guide member (4) is made of transparent material.
     
    5. The display device according to claim 4, wherein the transparent material is glass, resin, polymethyl methacrylate, or plastic.
     
    6. The display device according to any one of claims 1 to 5, wherein the securing surface (40) of the light guide member (4) is adhered to the frame (1).
     
    7. The display device according to any one of claims 1 to 5, wherein the light guide member (4) is fixed to the frame (1) by means of a bolt.
     
    8. The display device according to any one of claims 2 to 7, wherein the infrared receiver (3) is mounted in the groove (41) by means of a bolt.
     
    9. The display device according to any one of claims 2 to 7, wherein the infrared receiver (3) is adhered to the groove (41).
     


    Ansprüche

    1. Anzeigevorrichtung mit einem Anzeigeschirm (2) und einem Rahmen (1), der um den Anzeigeschirm (2) herum angeordnet ist, wobei die Anzeigevorrichtung weiter aufweist
    einen Infrarotempfänger (3); und
    ein Lichtleiterelement (4) mit einer Befestigungsfläche (40), wobei das Lichtleiterelement (4) weiter aufweist ein Empfangsende (42) und eine Lichtaustrittsfläche (423), wobei das Empfangsende (42) an einer Anzeigeseite des Anzeigeschirms (2) gebildet ist, wobei
    eine Breite der Empfangsfläche (420) in einer Richtung senkrecht zu dem Rahmen (1), an den das Lichtleiterelement (4) befestigt ist, schmaler ist als eine Breite der Lichtaustrittsfläche (423) in der Richtung; und wobei das Empfangsende (42) die Infrarotsteuersignale empfängt und die Übertragungsrichtung davon so ändert, dass die Signale zu dem Infrarotempfänger (3) übertragen werden, und ein Abstand zwischen der Befestigungsfläche (40) des Lichtleiterelements (4), durch das das Lichtleiterelement (4) an dem Rahmen (1) befestigt ist, und einer Fläche des Lichtleiterelements (4) gegenüber der Befestigungsfläche (40) kontinuierlich in einer Richtung von dem Empfangsende (42) zu der Lichtaustrittsfläche (423) vergrößert wird, dadurch gekennzeichnet, dass
    das Lichtleiterelement (4) an den Rahmen (1) durch die Befestigungsfläche (40) befestigt ist;
    das Empfangsende (42) eine erste Empfangsfläche (420) und eine zweite Empfangsfläche (421) zum Empfangen von Infrarotsteuersignalen hat, wobei die erste Empfangsfläche (420) parallel zu der Anzeigeseite des Anzeigeschirms (2) ist, und die zweite Empfangsfläche (421) die erste Empfangsfläche (420) schneidet und gegenüber der Befestigungsfläche (40) ist;
    eine untere Fläche des Empfangsendes (42) eine Bogenfläche ist.
     
    2. Anzeigevorrichtung gemäß Anspruch 1, wobei das Lichtleiterelement (4) eine Nut (41) zum Aufnehmen eines Infrarotempfängers (3) aufweist, der zu der Lichtaustrittsfläche (423) des Lichtleiterelements (4) hin befestigt ist.
     
    3. Anzeigevorrichtung gemäß einem der Ansprüche 1 bis 2, wobei eine untere Fläche des Empfangsendes (42) eine Ebene ist, und ein eingeschlossener Winkel zwischen der unteren Fläche des Empfangsendes (42) und einer oberen Fläche des Empfangsendes (42) in einem Bereich von 30° bis 70° ist.
     
    4. Anzeigevorrichtung gemäß einem der Ansprüche 1 bis 3, wobei das Lichtleiterelement. (4) aus einem transparenten Material hergestellt ist.
     
    5. Anzeigevorrichtung gemäß Anspruch 4, wobei das transparente Material Glas, Harz, Polymethylmethacrylat oder Plastik ist.
     
    6. Anzeigevorrichtung gemäß einem der Ansprüche 1 bis 5, wobei die Befestigungsfläche (40) des Lichtleiterelements (4) an dem Rahmen (1) geklebt ist.
     
    7. Anzeigevorrichtung gemäß einem der Ansprüche 1 bis 5, wobei das Lichtleiterelement (4) an den Rahmen (1) mittels eines Stifts befestigt ist.
     
    8. Anzeigevorrichtung gemäß einem der Ansprüche 2 bis 7, wobei der Infrarotempfänger (3) in die Nut (41) mittels eines Stifts montiert ist.
     
    9. Anzeigevorrichtung gemäß einem der Ansprüche 2 bis 7, wobei der Infrarotempfänger (3) in die Nut (41) geklebt ist.
     


    Revendications

    1. Dispositif d'affichage comprenant un écran d'affichage (2) et un cadre (1) qui est disposé sur le pourtour de l'écran d'affichage (2), le dispositif d'affichage comprenant en outre :

    un récepteur infrarouge (3) ; et

    un élément de guidage de lumière (4) qui comporte une surface de fixation (40), l'élément de guidage de lumière (4) comprenant en outre une extrémité de réception (42) et une surface de sortie de lumière (423), l'extrémité de réception (42) étant formée au niveau d'un côté d'affichage de l'écran d'affichage (2) ; dans lequel :
    une largeur de la surface de réception (420) dans une direction qui est perpendiculaire au cadre (1) auquel l'élément de guidage de lumière (4) est fixé est plus étroite qu'une largeur de la surface de sortie de lumière (423) dans la direction ; et l'extrémité de réception (42) reçoit les signaux de commande infrarouge et modifie leur direction de transmission de manière à transmettre les signaux au récepteur infrarouge (3), et une distance entre la surface de fixation (40) de l'élément de guidage de lumière (4) par l'intermédiaire de laquelle l'élément de guidage de lumière (4) est fixé au cadre (1) et une surface de l'élément de guidage de lumière (4) qui est opposée à la surface de fixation (40) est augmentée en continu dans une direction depuis l'extrémité de réception (42) jusqu'à la surface de sortie de lumière (423) ; caractérisé en ce que :

    l'élément de guidage de lumière (4) est fixé au cadre (1) par l'intermédiaire de la surface de fixation (40) ;

    l'extrémité de réception (42) comporte une première surface de réception (420) et une seconde surface de réception (421) pour recevoir des signaux de commande infrarouge, la première surface de réception (420) étant parallèle au côté d'affichage de l'écran d'affichage (2), et la seconde surface de réception (421) intersectant la première surface de réception (420) et étant opposée à la surface de fixation (40) ; et

    une surface inférieure de l'extrémité de réception (42) est une surface en forme d'arc.


     
    2. Dispositif d'affichage selon la revendication 1, dans lequel l'élément de guidage de lumière (4) comporte une gorge (41) pour recevoir un récepteur infrarouge (3) qui est monté de manière à ce qu'il fasse face à la surface de sortie de lumière (423) de l'élément de guidage de lumière (4).
     
    3. Dispositif d'affichage selon l'une quelconque des revendications 1 et 2, dans lequel une surface inférieure de l'extrémité de réception (42) est un plan, et un angle inclus entre la surface inférieure de l'extrémité de réception (42) et une surface supérieure de l'extrémité de réception (42) s'inscrit dans une plage qui va de 30° à 70°.
     
    4. Dispositif d'affichage selon l'une quelconque des revendications 1 à 3, dans lequel l'élément de guidage de lumière (4) est réalisé en un matériau transparent.
     
    5. Dispositif d'affichage selon la revendication 4, dans lequel le matériau transparent est du verre, une résine, du polyméthacrylate de méthyle ou une matière plastique.
     
    6. Dispositif d'affichage selon l'une quelconque des revendications 1 à 5, dans lequel la surface de fixation (40) de l'élément de guidage de lumière (4) est collée sur le cadre (1).
     
    7. Dispositif d'affichage selon l'une quelconque des revendications 1 à 5, dans lequel l'élément de guidage de lumière (4) est fixé sur le cadre (1) au moyen d'un boulon.
     
    8. Dispositif d'affichage selon l'une quelconque des revendications 2 à 7, dans lequel le récepteur infrarouge (3) est monté dans la gorge (41) au moyen d'un boulon.
     
    9. Dispositif d'affichage selon l'une quelconque des revendications 2 à 7, dans lequel le récepteur infrarouge (3) est collé sur la gorge (41).
     




    Drawing














    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description