(19)
(11) EP 3 726 349 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
25.11.2020 Bulletin 2020/48

(43) Date of publication:
21.10.2020 Bulletin 2020/43

(21) Application number: 19856493.2

(22) Date of filing: 04.03.2019
(51) International Patent Classification (IPC): 
G06F 3/041(2006.01)
(86) International application number:
PCT/CN2019/076865
(87) International publication number:
WO 2020/177055 (10.09.2020 Gazette 2020/37)
(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
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(71) Applicant: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
Shenzhen, Guangdong 518045 (CN)

(72) Inventor:
  • CHENG, Deng
    Shenzhen, Guangdong 518045 (CN)

(74) Representative: Sticht, Andreas 
Kraus & Weisert Patentanwälte PartGmbB Thomas-Wimmer-Ring 15
80539 München
80539 München (DE)


(56) References cited: : 
   
       


    (54) METHODS AND DEVICES FOR SUSPENSION STATE DETERMINATION AND SUSPENSION COMPENSATION OF TOUCH SCREEN


    (57) Disclosed are floating state determination and floating compensation methods and apparatuses for a touch screen. The floating state determination method includes: performing two times of self-capacitance interlaced driving on the touch screen in each of a driving direction and a sensing direction (S1); calculating self-capacitance differences corresponding to the two times of self-capacitance interlaced driving in each of the driving direction and a sensing direction, and obtaining an interlaced differential value of each channel based on the self-capacitance differences (S2); and calculating a self-capacitance differential value of each channel, and determining a floating level of the channel based on the result of calculation (S3). The floating state determination method can determine a floating state of the touch screen, and then a floating compensation is performed based on the floating state, so that the capacitive screen can be operated normally under floating.