Haptic panel and display apparatus

1 . A haptic panel, comprising:

a display module;

a cover plate on a light exiting side of the display module, wherein a size of the cover plate is larger than a size of the display module;

a plurality of piezoelectric devices, arranged on a same side of the cover plate as the display module, and at least arranged on an opposite side of the display module;

a supporting layer, arranged on a same side of the cover plate as the plurality of piezoelectric devices and at least arranged on a side of the display module, wherein an orthographic projection of the supporting layer on the cover plate and orthographic projections of the plurality of piezoelectric devices on the cover plate do not overlap, and at least part of the supporting layer has a plurality of openings that disconnect the supporting layer; and

a back frame, having an accommodation space for bearing the display module, and fixedly connected to the supporting layer.

2 . The haptic panel according to claim 1 , wherein the supporting layer is arranged surrounding the display module, and at least a region of the supporting layer adjacent to the plurality of piezoelectric devices has the plurality of openings.

3 . The haptic panel according to claim 2 , wherein the cover plate has a pair of long edges which are arranged opposite to each other and a pair of short edges connected with the pair of long edges; and

the plurality of piezoelectric devices are arranged on sides close to the pair of long edges of the cover plate.

4 . The haptic panel according to claim 2 , wherein the cover plate has a pair of long edges which are arranged opposite to each other and a pair of short edges connected with the pair of long edges; and

the plurality of piezoelectric devices are arranged on sides close to the pair of short edges of the cover plate;

wherein the plurality of piezoelectric devices are arranged on a periphery of the cover plate.

5 . The haptic panel according to claim 2 , wherein the plurality of openings are arranged in one-to-one correspondence to the plurality of piezoelectric devices;

a length of each opening in an arrangement direction of the piezoelectric devices is larger than or equal to a length of the piezoelectric device in the arrangement direction of the piezoelectric devices; and

the piezoelectric device is arranged in at least part of a space of the opening.

6 . The haptic panel according to claim 5 , wherein a center of the piezoelectric device coincides with a center of a corresponding opening.

7 . The haptic panel according to claim 5 , wherein an orthographic projection of the piezoelectric device on the cover plate and an orthographic projection of a corresponding opening on the cover plate have an overlapping region; and

a center of the piezoelectric device does not coincide with a center of the corresponding opening.

8 . The haptic panel according to claim 5 , further comprising a protective layer on a side of the plurality of piezoelectric devices facing away from the cover plate;

wherein the protective layer covers a surface of the piezoelectric device facing away from the cover plate and covers a side surface of the piezoelectric device not in contact with the supporting layer; and

the protective layer is in contact with the cover plate.

9 . The haptic panel according to claim 8 , wherein a thickness of the supporting layer is larger than a maximum thickness of the protective layer.

10 . The haptic panel according to claim 2 , wherein all side edges of the supporting layer have a plurality of openings that disconnect the supporting layer; and

the plurality of piezoelectric devices are arranged between the supporting layer and the display module;

wherein a quantity of the openings in each of the side edges of the supporting layer is smaller than a quantity of the piezoelectric devices.

11 . The haptic panel according to claim 10 , further comprising a protective layer on a side of the plurality of piezoelectric devices facing away from the cover plate;

wherein the protective layer covers a surface of the piezoelectric device facing away from the cover plate and covers a side surface of the piezoelectric device; and

the protective layer is a closed annulus surrounding the display module.

12 . The haptic panel according to claim 8 , wherein a material of the protective layer comprises green oil or tri-proof paint.

13 . The haptic panel according to claim 1 , wherein the piezoelectric devices are arranged at positions of a wave crest and/or a wave trough of a mechanical wave that drives the cover plate to vibrate.

14 . The haptic panel according to claim 1 , wherein a material of the supporting layer comprises at least one of rubber, foam, sponge, or polydimethylsiloxane.

15 . The haptic panel according to claim 1 , wherein the display module comprises a display panel and back light which are laminated on a side of the cover plate facing the back frame.

16 . The haptic panel according to claim 1 , wherein each of the plurality of piezoelectric devices comprises a first electrode, a piezoelectric layer and a second electrode which are laminated;

wherein first electrodes of all the piezoelectric devices are grounded;

second electrodes of the piezoelectric devices located on a same side of the display module are electrically connected with a same driving voltage end; and

second electrodes of the piezoelectric devices located on different sides of the display module are electrically connected with different driving voltage ends.

17 . The haptic panel according to claim 1 , further comprising:

a flexible printed board arranged within the back frame and electrically connected with the display module; and

a printed circuit board on an outer side of the back frame;

wherein the first electrode and second electrode of the piezoelectric device are electrically connected with the flexible printed board respectively, and the flexible printed board is electrically connected with the printed circuit board through the opening.

18 . The haptic panel according to claim 1 , wherein a structure of each of the plurality of piezoelectric devices is a piezoelectric thin film or a piezoelectric ceramic block.

19 . The haptic panel according to claim 1 , wherein the cover plate comprises a cover plate on a surface of a display module of a notebook computer, a cover plate on a surface of a vehicle-mounted display module, or a cover plate on a surface of a display module of a mobile terminal.

20 . A display apparatus, comprising the haptic panel according to claim 1 .