US 12,175,856 B2
Haptic rendering device, method, display device and controller
Yongchun Tao, Beijing (CN); Yuju Chen, Beijing (CN); Xiaofeng Yin, 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. 17/795,762
Filed by BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Sep. 26, 2021, PCT No. PCT/CN2021/120569
§ 371(c)(1), (2) Date Jul. 27, 2022,
PCT Pub. No. WO2023/044841, PCT Pub. Date Mar. 30, 2023.
Prior Publication US 2024/0185693 A1, Jun. 6, 2024
Int. Cl. G08B 6/00 (2006.01)
CPC G08B 6/00 (2013.01) 17 Claims
OG exemplary drawing
 
1. A haptic rendering device, comprising:
a substrate;
a first driver arranged on the substrate and configured to vibrate and drive the substrate to vibrate after receiving a first driving signal;
a vibration sensor arranged on the substrate and configured to generate a first detection voltage signal according to an amplitude or a frequency at which the first driver vibrates together with the substrate in a case where the substrate vibrates; and
a controller configured to output the first driving signal to the first driver, receive the first detection voltage signal, and adjust the first driving signal according to the first detection voltage signal;
wherein the vibration sensor comprises an accelerometer, the accelerometer comprises a piezoelectric accelerometer, and the piezoelectric accelerometer comprises:
a first bottom electrode on the substrate;
a first portion of the substrate below the first bottom electrode, wherein the first portion comprises a recess on a side away from the first bottom electrode and a mass block surrounded by the recess, wherein a thickness of part of the first portion at a bottom of the recess in a direction perpendicular to the substrate is less than a thickness of the mass block in the direction perpendicular to the substrate;
a first piezoelectric thin film layer on a side of the first bottom electrode away from the substrate; and
a first top electrode on a side of the first piezoelectric thin film layer away from the substrate;
wherein the first bottom electrode and the first top electrode are electrically connected to the controller, and an orthographic projection of the recess on the substrate at least partially overlaps with an orthographic projection of the first piezoelectric thin film layer on the substrate.