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CN-122003652-A - Haptic feedback module, driving method thereof and haptic feedback device

CN122003652ACN 122003652 ACN122003652 ACN 122003652ACN-122003652-A

Abstract

A haptic feedback module, a driving method thereof and a haptic feedback device relate to the technical field of haptic feedback. The touch feedback module comprises a cover plate, a touch display panel and an actuator, wherein the touch display panel is arranged on one side of the cover plate, a display surface of the touch display panel is arranged close to the cover plate, the display surface comprises two curved edges which are oppositely arranged along a first direction, orthographic projection of the touch display panel on the cover plate is positioned in the range of the cover plate, the actuator and the touch display panel are arranged on the same side of the cover plate, the actuator comprises at least one first actuator and at least one second actuator, the first actuator and the second actuator are both arranged close to the curved edges, the first actuator and the second actuator are positioned on different sides of a first median line, the first median line is a straight line connecting midpoints of the two curved edges, and the actuator is used for driving the cover plate to vibrate in response to a driving signal so as to generate touch feedback on the surface of the cover plate, which is far away from the touch display panel.

Inventors

  • WANG YINGZI
  • Qi Dexing
  • XU JIAN
  • WANG SHUAI

Assignees

  • 京东方科技集团股份有限公司
  • 北京京东方技术开发有限公司

Dates

Publication Date
20260508
Application Date
20240903

Claims (20)

  1. A haptic feedback module, comprising: A cover plate; The touch display panel is arranged on one side of the cover plate, the display surface of the touch display panel is arranged close to the cover plate and comprises two curved edges which are oppositely arranged along a first direction, the orthographic projection of the touch display panel on the cover plate is positioned in the range of the cover plate, and The actuator is arranged on the same side of the cover plate with the touch display panel, the actuator comprises at least one first actuator and at least one second actuator, the first actuator and the second actuator are both close to the curved edge and arranged on different sides of a first median line, the first median line is a straight line connecting the midpoints of the two curved edges, and the actuator is used for responding to a driving signal to drive the cover plate to vibrate so as to generate tactile feedback on the surface of the cover plate, which is far away from the touch display panel.
  2. The haptic feedback module of claim 1 wherein the first actuator and the second actuator disposed proximate to the same curved edge are in a unitary structure that communicates with each other, the unitary structure being a bar-shaped structure extending along the curved edge.
  3. The haptic feedback module of claim 1, wherein the first actuator and the second actuator are disposed apart from each other and an orthographic projection of the first actuator and the second actuator on the display surface does not overlap the first median line.
  4. The haptic feedback module of claim 3 wherein a plurality of said first actuators and a plurality of said second actuators are arranged along a direction of extension of said curved edge, and In the extending direction of the curved edge, the distance between two adjacent first actuators and second actuators, and the distance between two adjacent second actuators are substantially equal and are all greater than zero.
  5. The haptic feedback module of claim 1 wherein the first actuator and the second actuator disposed proximate to the same curved edge are translationally symmetric along the direction of extension of the curved edge.
  6. The haptic feedback module of claim 1, wherein the display surface further comprises two straight edges disposed opposite each other along a second direction, the two curved edges comprising a first curved edge and a second curved edge, the first actuator disposed proximate the first curved edge being axisymmetric about a second median axis with the first actuator disposed proximate the second curved edge, the second actuator disposed proximate the first curved edge being axisymmetric about the second median axis with the second actuator disposed proximate the second curved edge, the second median line being a straight line connecting midpoints of the two straight edges.
  7. The haptic feedback module of claim 1, wherein the cover plate includes a first edge disposed proximate to the curved edge, the gap between the first edge and the curved edge including a first gap and a second gap in an orthographic projection on the cover plate, the first actuator disposed within the first gap, the second actuator disposed within the second gap, a width of the first gap in the first direction being greater than or equal to a width of the second gap in the first direction.
  8. The haptic feedback module of claim 7, wherein among the plurality of actuators disposed near the same curved edge, a plurality of first actuators are arrayed along an extending direction of the curved edge, and the plurality of first actuators are formed in a row, a plurality of second actuators are arrayed along the extending direction of the curved edge, and the plurality of second actuators are formed in a row.
  9. The haptic feedback module of claim 7 wherein a plurality of first actuators disposed proximate to a same curved edge are arranged in a matrix, the plurality of first actuators being divided into a plurality of first actuator columns along the first direction; A plurality of second actuator arrays disposed adjacent to the same curved edge, the plurality of second actuators being divided into at least one second actuator column along the first direction, and The number of first actuator columns disposed adjacent to the same curved edge is greater than or equal to the number of second actuator columns.
  10. The haptic feedback module of claim 7, wherein the two curved sides include a first curved side and a second curved side, the plurality of first actuators disposed proximate to the first curved side are arrayed along the direction of extension of the first curved side, and the plurality of first actuators are formed in a column, the plurality of second actuators disposed proximate to the second curved side are arrayed along the direction of extension of the second curved side, and the plurality of second actuators are formed in a column.
  11. The haptic feedback module of claim 7 wherein a plurality of first actuators disposed proximate to a same curved edge are arranged in a matrix, the plurality of first actuators being divided into a plurality of first actuator columns along the first direction; A plurality of second actuator arrays disposed adjacent to the same curved edge, the plurality of second actuators being divided into at least one second actuator column along the first direction, and The two curved edges comprise a first curved edge and a second curved edge, and the number of the first actuator columns arranged close to the first curved edge is greater than or equal to the number of the second actuator columns arranged close to the second curved edge.
  12. The haptic feedback module of any one of claims 1 to 11, wherein the display surface further includes two straight edges disposed opposite each other in a second direction, the actuator further includes at least one third actuator disposed adjacent to the straight edges, and The first actuator and the second actuator are configured to generate vibrations at a first frequency, and the third actuator is configured to generate vibrations at a second frequency, the first frequency being less than the second frequency.
  13. The haptic feedback module of claim 12 wherein said cover includes a second edge proximate said straight edge, said third actuator being disposed in a gap between said second edge and said straight edge in an orthographic projection on said cover, and The distance between the geometric center of the third actuator and the second edge is m times of a first half wavelength, the distance between the geometric center of the first actuator and the second edge is n times of the first half wavelength, the distance between the geometric center of the second actuator and the second edge is k times of the first half wavelength, m, n and k are positive integers which are larger than or equal to 1, m, n and k are different from each other, and the first half wavelength is half of a standing wave wavelength formed by the third actuator driving the cover plate to vibrate.
  14. The haptic feedback module of claim 12 wherein the number of third actuators disposed proximate to the same straight edge is one and the third actuators are bar-shaped structures extending along the straight edge.
  15. The haptic feedback module of claim 12, wherein a number of the third actuators disposed near the same straight edge is plural, and the plurality of the third actuators disposed near the same straight edge are arranged along an extending direction of the straight edge.
  16. The haptic feedback module of claim 15, wherein a distance between two of the third actuators disposed adjacently in the direction of extension of the straight edge is greater than zero and less than or equal to half a width of the third actuator in the direction of extension of the straight edge.
  17. The haptic feedback module of claim 12, wherein a width of the first actuator along the second direction, a width of the second actuator along the second direction, and a width of the third actuator along the second direction are all less than or equal to a first half wavelength, the first half wavelength being half a wavelength of a standing wave formed by the third actuator vibrating the cover plate.
  18. The haptic feedback module of any one of claims 1 to 11, wherein the curved edge has a curvature greater than or equal to R100, and/or The central angle corresponding to the curved edge is more than or equal to 90 degrees and/or The thickness of the cover plate is greater than or equal to 0.5mm and less than or equal to 2mm.
  19. The haptic feedback module of any of claims 1-11, wherein a ratio of a width of the cover perpendicular to the first direction to a width of the cover along the first direction is greater than or equal to 2/3 and less than or equal to 1.
  20. The haptic feedback module of any one of claims 1 to 11, wherein the two curved edges are parallel to each other or extension lines of the two curved edges intersect at an angle greater than 0 ° and less than 90 °.

Description

Haptic feedback module, driving method thereof and haptic feedback device Technical Field The disclosure relates to the technical field of haptic feedback, in particular to a haptic feedback module, a driving method thereof and a haptic feedback device. Background Haptic feedback is a leading edge technology in the field of virtual reality and man-machine interaction, and multimedia terminals such as smart phones, tablet computers and the like applying the haptic feedback technology have wide application prospects in the fields of education, entertainment, medical treatment and the like. With the vigorous development of new energy automobiles, vehicle-mounted display screens have become a trend, and more interactive components such as entity keys, knobs and the like are realized on touch display screens. SUMMARY The present disclosure provides a haptic feedback module, comprising: A cover plate; The touch display panel is arranged on one side of the cover plate, the display surface of the touch display panel is arranged close to the cover plate and comprises two curved edges which are oppositely arranged along a first direction, the orthographic projection of the touch display panel on the cover plate is positioned in the range of the cover plate, and The actuator is arranged on the same side of the cover plate with the touch display panel, the actuator comprises at least one first actuator and at least one second actuator, the first actuator and the second actuator are both close to the curved edge and arranged on different sides of a first median line, the first median line is a straight line connecting the midpoints of the two curved edges, and the actuator is used for responding to a driving signal to drive the cover plate to vibrate so as to generate tactile feedback on the surface of the cover plate, which is far away from the touch display panel. In some embodiments, the first actuator and the second actuator disposed adjacent to the same curved edge are in a unitary structure that communicates with each other, the unitary structure being a strip-shaped structure that extends along the curved edge. In some embodiments, the first actuator and the second actuator are disposed apart from each other, and an orthographic projection of the first actuator and the second actuator on the display surface does not overlap the first median line. In some embodiments, a plurality of the first actuators and a plurality of the second actuators are arranged along the extending direction of the curved edge, and In the extending direction of the curved edge, the distance between two adjacent first actuators and second actuators, and the distance between two adjacent second actuators are substantially equal and are all greater than zero. In some embodiments, the first actuator and the second actuator disposed proximate to the same curved edge are translationally symmetric along the direction of extension of the curved edge. In some embodiments, the display surface further includes two straight edges disposed opposite to each other along a second direction, the two curved edges include a first curved edge and a second curved edge, the first actuator disposed near the first curved edge and the first actuator disposed near the second curved edge are axisymmetric about a second median axis, the second actuator disposed near the first curved edge and the second actuator disposed near the second curved edge are axisymmetric about the second median axis, and the second median line is a straight line connecting midpoints of the two straight edges. In some embodiments, the cover plate includes a first edge disposed proximate to the curved edge, the gap between the first edge and the curved edge including a first gap within which the first actuator is disposed and a second gap within which the second actuator is disposed, the width of the first gap in the first direction being greater than or equal to the width of the second gap in the first direction in an orthographic projection on the cover plate. In some embodiments, among the plurality of actuators disposed near the same curved edge, the plurality of first actuators are arrayed along the extending direction of the curved edge, and the plurality of first actuators are formed in a row, the plurality of second actuators are arrayed along the extending direction of the curved edge, and the plurality of second actuators are formed in a row. In some embodiments, a plurality of first actuators disposed adjacent to the same curved edge are arranged in a matrix, the plurality of first actuators being divided into a plurality of first actuator columns along the first direction; A plurality of second actuator arrays disposed adjacent to the same curved edge, the plurality of second actuators being divided into at least one second actuator column along the first direction, and The number of first actuator columns disposed adjacent to the same curved edge is greater than or equal to the