US 12,345,989 B2
Array substrate, handwriting tablet, tablet eraser, handwriting tablet system and method for erasing pattern
Xiaojuan Wu, Beijing (CN); Xiuliang Wang, Beijing (CN); Jiaxing Wang, Beijing (CN); Yu Zhao, Beijing (CN); Jian Wang, Beijing (CN); Yao Bi, Beijing (CN); Jinshuai Duan, Beijing (CN); Yang Ge, Beijing (CN); Zhilong Duan, Beijing (CN); Zhiqiang Yu, Beijing (CN); Cuiyu Chen, Beijing (CN); Feng Liu, 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. 18/682,934
Filed by Beijing BOE Optoelectronics Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Nov. 30, 2021, PCT No. PCT/CN2021/134290
§ 371(c)(1), (2) Date Feb. 12, 2024,
PCT Pub. No. WO2023/097425, PCT Pub. Date Jun. 8, 2023.
Prior Publication US 2024/0353726 A1, Oct. 24, 2024
Int. Cl. G02F 1/137 (2006.01); G02F 1/133 (2006.01); G06F 3/042 (2006.01); G09G 3/36 (2006.01)
CPC G02F 1/137 (2013.01) [G02F 1/133 (2013.01); G06F 3/042 (2013.01); G09G 3/36 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An array substrate comprising a handwriting area and a peripheral area surrounding the handwriting area, wherein the array substrate comprises erasing electrodes arranged in an array and a driving circuit for driving the erasing electrodes, the driving circuit is configured to load erasing voltages onto the erasing electrodes in response to illumination of preset light, and the array substrate is further provided with a Near Field Communication (NFC) coil for emitting an NFC signal, with a sensing range of the NFC coil covering the handwriting area; and
wherein the array substrate comprises a base substrate, a driving layer, a sensing layer a base color layer and an anti-reflective layer, the base substrate and the driving layer are arranged in stacked manner, the sensing layer is located on a side of the driving layer close to the base substrate, the anti-reflective layer is located on a side of the sensing layer close to the driving layer, and the base color layer is located on a side of the sensing layer away from the driving layer.