US 12,487,680 B2
Haptic feedback panel, haptic feedback method therefor, and haptic feedback device therefor
Yuju Chen, Beijing (CN); Xiaotong Liu, Beijing (CN); and Zhiming Yang, Beijing (CN)
Assigned to Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 18/691,406
Filed by Beijing BOE Technology Development Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Nov. 29, 2021, PCT No. PCT/CN2021/133907
§ 371(c)(1), (2) Date Mar. 12, 2024,
PCT Pub. No. WO2023/092540, PCT Pub. Date Jun. 1, 2023.
Prior Publication US 2024/0377890 A1, Nov. 14, 2024
Int. Cl. G06F 3/041 (2006.01); G06F 3/01 (2006.01)
CPC G06F 3/016 (2013.01) [G06F 3/041 (2013.01); G06F 2203/04107 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A haptic feedback panel, comprising:
a touch substrate; and
at least one piezoelectric device on a side of the touch substrate, the piezoelectric device being configured to vibrate under action of alternating electric fields with different resonant frequencies, and drive the touch substrate to vibrate and emit a vibration sound;
wherein the piezoelectric device comprises a first electrode, a piezoelectric layer and a second electrode sequentially stacked; wherein the first electrode is close to the touch substrate, the first electrode is grounded, and the second electrode is electrically connected with an input end of a driving voltage;
the first electrode and the second electrode are configured to form the alternating electric fields, and the piezoelectric layer is configured to vibrate under the action of the alternating electric fields, and drive the touch substrate to vibrate and emit the vibration sound;
wherein:
the driving voltage for driving the touch substrate to emit the vibration sound of a periodic vibration sense satisfies a following relationship:

OG Complex Work Unit Math
wherein Y is the driving voltage, fc is a carrier frequency, fe is an envelope frequency, and t is vibration time;
or
the driving voltage input by the input end of the driving voltage for driving the touch substrate to emit the vibration sound of a tapping vibration sense satisfies a following relationship:

OG Complex Work Unit Math
wherein Y is the driving voltage, B is an inverse attenuation coefficient, fc is a carrier frequency, and t is vibration time.