US 12,411,550 B2
Tactile feedback device, display apparatus, and tactile feedback method
Yongchun Tao, Beijing (CN); Yuju Chen, Beijing (CN); and Yingzi Wang, Beijing (CN)
Assigned to BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/787,404
Filed by Beijing BOE Technology Development Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Aug. 30, 2021, PCT No. PCT/CN2021/115325
§ 371(c)(1), (2) Date Jun. 20, 2022,
PCT Pub. No. WO2023/028756, PCT Pub. Date Mar. 9, 2023.
Prior Publication US 2024/0184365 A1, Jun. 6, 2024
Int. Cl. G06F 3/01 (2006.01); B06B 1/02 (2006.01); B06B 1/06 (2006.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/016 (2013.01) [B06B 1/0253 (2013.01); B06B 1/0622 (2013.01); G06F 3/04164 (2019.05); G06F 3/0446 (2019.05)] 18 Claims
OG exemplary drawing
 
1. A tactile feedback device, having a sensing area and a feedback area surrounding the sensing area, comprising: a base substrate, and a touch element, a piezoelectric element and a tactile feedback driving component on the base substrate, the touch element being in the sensing area, and the piezoelectric element being in the feedback area, wherein
the tactile feedback driving component is configured to:
determine a touch position in response to a touch data acquired by the touch element;
determine a corresponding driving signal according to at least a touch area where the touch position is located; and
input the driving signal to the piezoelectric element to drive the piezoelectric element to generate a tactile feedback, wherein
the piezoelectric element comprises: a first electrode, a piezoelectric film, and a second electrode sequentially stacked along a direction away from the base substrate,
the touch element comprises a plurality of touch electrodes, a plurality of sensing electrodes and an interlayer insulating layer between a layer in which the plurality of touch electrodes are located and a layer in which the plurality of sensing electrodes are located; orthographic projections of the plurality of touch electrodes and the plurality of sensing electrodes on the base substrate intersect with each other; and
a lower surface of the plurality of touch electrodes and an upper surface of the first electrode are at a first vertical level relative to the base substrate, and a lower surface of the plurality of sensing electrodes and an upper surface of the second electrode are at a second vertical level relative to the base substrate, and the first vertical level is different from the second vertical level.