# US 11,112,871 B2 · Display panel, display device and deformation unit with haptic feedback > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,112,871 B2 - Document ID: US11112871B2 - Status: Granted - Kind: B2 - Application number: 16/910,681 - Filed: 2020-06-24 - Published: 2021-01-21 - Granted: 2021-09-07 - Earliest claimed: 2019-07-17 - Assignees: Boe Technology Group Co., Ltd. - Applicants: BOE Technology Group Co., Ltd. - Inventors: Jiabin Wang; Xiaoliang Ding; Yangbing Li - Web page: https://patentgrep.com/patent/US11112871B2 ## CPC - G06F 3/016: {Input arrangements with force or tactile feedback as computer generated output to the user} - B06B 1/0603: {using a piezoelectric bender, e.g. bimorph} - G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - B06B: METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, {e.g.} FOR PERFORMING MECHANICAL WORK IN GENERAL (for particular applications, see the relevant subclasses, e.g. B07B1/40, B23Q17/12, B24B31/06; measurement of mechanical vibrations G01H; in direction finding, locating, distance or velocity measuring G01S; {generating seismic energy G01V1/02}; control of mechanical vibrations in general G05D; sound-producing devices, e.g. bells, sirens, whistles G10K, {e.g. methods or devices for transmitting, conducting, or directing sound in general G10K11/00}; generation of electrical oscillations H03B; electromechanical resonators in general H03H; electromechanical transducers {for communication techniques, e.g. microphones, speakers} H04R) ## Abstract A display panel is disclosed. The display panel includes a back plate, a plurality of pixel units formed on the back plate, and a plurality of deformation units for providing haptic feedback. Each deformation unit is on one or more corresponding pixel units of the plurality of pixel units, and when being applied a drive voltage, undergoes a deformation corresponding to a haptic feature of a visual object displayed by the corresponding pixel units. Thereby, there is provided a display panel with haptic feedback, which is simple in structure and easy to implement. ## Claims ### Claim 1 A display panel, comprising: a back plate, a plurality of pixel units on the back plate, and a plurality of deformation units configured to provide haptic feedback, wherein a respective deformation unit of the plurality of deformation units is on one or more corresponding pixel units of the plurality of pixel units, and is configured to undergo a deformation corresponding to a haptic feature of a visual object displayed by the one or more corresponding pixel units responsive to application of a drive voltage; wherein the respective deformation unit further comprises a deformation drive circuit on the back plate, the deformation drive circuit comprises a drive unit configured to receive a deformation data signal and output the drive voltage based on the deformation data signal; wherein the drive unit is further configured to receive a row scanning signal, and is configured to output the drive voltage based on the deformation data signal responsive to an active state of the row scanning signal, and wherein a magnitude of the drive voltage varies with the deformation data signal. ### Claim 2 (depends on 1) The display panel according to claim 1, wherein the respective deformation unit comprises: a substrate; a deformable assembly comprising a piezoelectric material on the substrate; and a drive electrode configured to receive the drive voltage, wherein the deformable assembly comprises a free terminal and a fixed terminal, wherein the fixed terminal is attached to the substrate and connected to the drive electrode, and wherein the free terminal is configured to undergo the deformation with a predetermined strength in response to a change in the drive voltage. ### Claim 3 (depends on 2) The display panel according to claim 2, wherein the deformation drive circuit further comprises: a maintain unit configured to receive the drive voltage from the drive unit, and supply the drive voltage to the drive electrode during display via the one or more corresponding pixel units of the respective deformation unit, such that the respective deformation unit undergoes the deformation and maintains the deformation; and a reset unit configured to receive a reset signal, and reset the maintain unit in response to the reset signal, such that the maintain unit stops supplying the drive voltage to cause the deformable assembly to restore to an original state. ### Claim 4 (depends on 3) The display panel according to claim 3, wherein the deformation data signal is a display data signal configured to drive the one or more corresponding pixel units, and the drive unit is configured to output the drive voltage responsive to an active level of the display data signal. ### Claim 5 (depends on 4) The display panel according to claim 4, wherein the drive unit comprises: a deformation drive transistor, comprising a gate configured to receive the display data signal, a first electrode configured to be connected to a power supply voltage, and a second electrode connected to the drive electrode of the respective deformation unit; and a first storage capacitor comprising a first terminal connected to the second electrode of the deformation drive transistor and the drive electrode, and a second terminal that is configured to be grounded. ### Claim 6 (depends on 5) The display panel according to claim 5, wherein the reset unit comprises: a reset transistor, wherein the reset transistor comprises a gate configured to receive a reset signal, a first electrode connected to the first terminal of the first storage capacitor, and a second electrode that is configured to be grounded. ### Claim 7 (depends on 5) The display panel according to claim 5, wherein the drive unit further comprises: an isolation diode which comprises a first terminal configured to receive the display data signal and a second terminal connected to the gate of the deformation drive transistor. ### Claim 8 (depends on 2) The display panel according to claim 2, further comprising: a top plate on the plurality of pixel units, wherein the top plate comprises the substrate of the respective deformation unit. ### Claim 9 (depends on 2) The display panel according to claim 2, wherein the piezoelectric material is a graphene material. ### Claim 10 (depends on 1) The display panel according to claim 1, wherein the drive unit comprises: a deformation drive transistor, which comprises a gate configured to receive the row scanning signal, a first electrode configured to receive the deformation data signal, and a second electrode connected to the drive electrode of the respective deformation unit; and a first storage capacitor comprising a first terminal connected to the second electrode of the deformation drive transistor and the drive electrode, and a second terminal that is configured to be grounded. ### Claim 11 (depends on 10) The display panel according to claim 10, wherein the reset unit comprises: a reset transistor comprising a gate configured to receive a reset signal, a first electrode connected to a first terminal of the first storage capacitor, and a second electrode that is configured to be grounded. ### Claim 12 (depends on 1) A display device comprising the display panel according to claim 1. ### Claim 13 (depends on 12) The display device according to claim 12, wherein the respective deformation unit comprises: a substrate; a deformable assembly attached to the substrate and comprising a piezoelectric material; and a drive electrode configured to receive the drive voltage, wherein the deformable assembly comprises a fixed terminal and a free terminal, wherein the fixed terminal is attached to the substrate and connected to the drive electrode, and wherein the free terminal is configured to undergo the deformation with a predetermined strength in response to a change in the drive voltage. ### Claim 14 (depends on 13) The display device according to claim 13, wherein the deformation drive circuit further comprises: a maintain unit configured to receive the drive voltage from the drive unit, and supply the drive voltage to the drive electrode during display via the one or more corresponding pixel units of the respective deformation unit, such that the respective deformation unit undergoes the deformation and maintains the deformation; and a reset unit configured to receive a reset signal, and reset the maintain unit in response to the reset signal, such that the maintain unit stops supplying the drive voltage to cause the deformable assembly to restore an original state. ### Claim 15 (depends on 14) The display device according to claim 14, wherein the deformation data signal is a display data signal configured to drive the one or more corresponding pixel units, and the drive unit is configured to output the drive voltage responsive to an active level of the display data signal. ### Claim 16 A deformation unit for providing haptic feedback in a display panel, the display panel comprising a back plate and a plurality of pixel units on the back plate, the deformation unit being on one or more corresponding pixel units of the plurality of pixel units and comprising: a substrate; a deformable assembly attached to the substrate and comprising a piezoelectric material, the deformable assembly comprising a free terminal and a fixed terminal attached to the substrate; and a drive electrode configured to receive a drive voltage, wherein the fixed terminal is connected to the drive electrode, and the free terminal is configured to undergo a deformation with a predetermined strength in response to a change in the drive voltage so as to undergo the deformation corresponding to a haptic feature of a visual object displayed by the one or more corresponding pixel units; wherein the deformation unit further comprises a deformation drive circuit on the back plate, the deformation drive circuit comprises a drive unit configured to receive a deformation data signal and output the drive voltage based on the deformation data signal; wherein the drive unit is further configured to receive a row scanning signal, and is configured to output the drive voltage based on the deformation data signal responsive to an active state of the row scanning signal, and wherein a magnitude of the drive voltage varies with the deformation data signal. ### Claim 17 (depends on 16) The deformation unit according to claim 16, wherein the piezoelectric material is a graphene material. ### Claim 18 (depends on 16) The deformation unit according to claim 16, wherein the deformable assembly is a deformable strip.