US 12,229,373 B2
Liquid crystal handwriting panel, handwriting device, and method for controlling same
Xiaojuan Wu, Beijing (CN); Xiuliang Wang, Beijing (CN); Jian Wang, Beijing (CN); Yu Zhao, Beijing (CN); Yang Ge, Beijing (CN); Jiaxing Wang, Beijing (CN); Yao Bi, Beijing (CN); Jinshuai Duan, Beijing (CN); Hongliang Yuan, Beijing (CN); and Tianyang Han, Beijing (CN)
Assigned to Beijing BOE Optoelectronics Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/921,328
Filed by Beijing BOE Optoelectronics Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Oct. 28, 2021, PCT No. PCT/CN2021/127187
§ 371(c)(1), (2) Date Oct. 25, 2022,
PCT Pub. No. WO2023/070469, PCT Pub. Date May 4, 2023.
Prior Publication US 2024/0385718 A1, Nov. 21, 2024
Int. Cl. G06F 3/044 (2006.01); G02F 1/1333 (2006.01); G06F 3/041 (2006.01); G06T 11/20 (2006.01); G09G 3/36 (2006.01)
CPC G06F 3/0443 (2019.05) [G02F 1/13338 (2013.01); G06F 3/0412 (2013.01); G06F 3/0447 (2019.05); G06T 11/203 (2013.01); G09G 3/3648 (2013.01); G09G 2300/0486 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A liquid crystal handwriting panel, comprising: a first substrate and a second substrate that are opposite to each other, and a liquid crystal layer between the first substrate and the second substrate; wherein
the first substrate comprises: a first base substrate, a touch electrode layer on a side of the first base substrate, and a first drive electrode layer on a side of the first base substrate, wherein the first drive electrode layer is closer to the liquid crystal layer than the touch electrode layer to the liquid crystal layer; and
the second substrate comprises: a second base substrate, a second drive electrode layer on a side of the second base substrate, and a shielding layer on a side of the second base substrate;
wherein the first drive electrode layer comprises a plurality of pixel electrodes, and the second drive electrode layer comprises a common electrode,
wherein the touch electrode layer comprises: a plurality of touch electrode blocks, wherein an orthogonal projection of each of the plurality of touch electrode blocks on the first base substrate is overlapped with an orthogonal projection of at least one of the plurality of pixel electrodes on the first base substrate; and
the first substrate further comprises: a plurality of touch signal lines, wherein the plurality of touch signal lines are electrically connected to the plurality of touch electrode blocks in one-to-one correspondence,
wherein the first substrate further comprises: a second insulation layer between the first drive electrode layer and the touch electrode layer, wherein the touch electrode layer is closer to the first base substrate than the first drive electrode layer to the first base substrate, and
wherein the liquid crystal layer is a bistable liquid crystal molecule layer.