Display module, display device and working method thereof

Patent metadata

Field	Value
Publication number	US-11064186-B2
Application number	US-201916649577-A
Country	US
Kind code	B2
Filing date	Mar 22, 2019
Priority date	Jun 12, 2018
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

A display module, a display device and a working method are provided. The display module includes a display panel; a grating structure, arranged on the light-emitting side of the display panel; a deformation unit, located between the display panel and the grating structure; a control circuit, configured to control the deformation unit to adjust a thickness of the deformation unit in a direction from the display panel to the grating structure to change a distance between the display panel and the grating structure.

First claim

What is claimed is:

1. A display module, comprising:
a display panel;
a grating structure on a light-emitting side of the display panel;
a deformation unit between the display panel and the grating structure; and
a control circuit, configured to control the deformation unit to adjust a thickness of the deformation unit in a direction from the display panel to the grating structure, to change a distance between the display panel and the grating structure;
wherein the deformation unit comprises an electro-deformation unit;
a thickness of the electro-deformation unit in the direction from the display panel to the grating structure changes under an action of an electric field, to change the distance between the display panel and the grating structure.

2. The display module according to claim 1 , wherein the electro-deformation unit comprises:
a first electrode and a second electrode opposite to each other;
an electroactive polymer material between the first electrode and the second electrode;
wherein an electrical signal is applied to the first electrode and the second electrode, to control a change in a thickness of the electroactive polymer material in the direction from the display panel to the grating structure.

3. The display module according to claim 2 , wherein the first electrode and the second electrode are made of a transparent conductive material; the electroactive polymer material is an electronic electroactive polymer material and/or an ionic electroactive polymer material.

4. The display module according to claim 3 , wherein the electroactive polymer material is an all-organic composite material or a composite material of a metal-organic complex Copper Phthalocyanine and P (VDF-TrFE) with a dielectric constant greater than a preset threshold.

5. The display module according to claim 1 , wherein an orthographic projection of the deformation unit onto the display panel is within a non-display area of the display panel.

6. The display module according to claim 5 , wherein the orthographic projection of the deformation unit onto the display panel surrounds a display area of the display panel.

7. The display module according to claim 6 , wherein the deformation unit is of a rectangular frame-like shape.

8. The display module according to claim 5 , wherein the deformation unit has a stripe-like shape and is disposed on opposite sides of the display area; or
the deformation unit is of a block-like shape and is evenly distributed in the non-display area.

9. The display module according to claim 1 , wherein the deformation unit is sandwiched between the display panel and the grating structure.

10. The display module according to claim 9 , wherein the deformation unit is in direct contact with the display panel; the deformation unit is in direct contact with the grating structure.

11. A display device, comprising a display module, wherein the display module comprises:
a display panel;
a grating structure on a light-emitting side of the display panel;
a deformation unit between the display panel and the grating structure; and
a control circuit, configured to control the deformation unit to adjust a thickness of the deformation unit in a direction from the display panel to the grating structure, to change a distance between the display panel and the grating structure;
wherein the display device further comprises:
a processing circuit, configured to control, based on the detected distance, the thickness of the deformation unit in the direction from the display panel of the display module to the grating structure of the display module;
wherein the deformation unit is a magneto-deformation unit, the magneto-deformation unit comprises two electrodes opposite to each other and a magnetostrictive material between the two electrodes;
the processing circuit comprises:
a calculation circuit, configured to calculate a distance h from the display panel to the grating structure according to a formula h/L=p/T, wherein L is a distance from the viewer to the grating structure, p is a pixel width of the display panel, and T is a pupillary distance of the viewer;
a control circuit, configured to control a magnitude of an alternating current signal applied to the two electrodes of the magneto-deformation unit to control an intensity of a magnetic field between the two electrodes, to control the magnetostrictive material to adjust the thickness of the magnetostrictive material in the direction from the display panel to the grating structure, to make the distance between the display panel and the grating structure to be h.

12. The display device according to claim 11 , further comprising:
a detecting circuit, configured to detect a distance between a viewer and the display module.

13. The display device according to claim 12 , wherein the detecting module is an infrared sensor on the grating structure of the display module.

14. A working method of a display device, applying to the display device, wherein the display device comprises a display module;
wherein the display module comprises:
a display panel;
a grating structure on a light-emitting side of the display panel;
a deformation unit between the display panel and the grating structure; and
a control circuit, configured to control the deformation unit to adjust a thickness of the deformation unit in a direction from the display panel to the grating structure, to change a distance between the display panel and the grating structure;
the working method comprises:
detecting a distance between a viewer and the display module in the display device;
controlling a thickness of the deformation unit in the display device according to the detected distance;
wherein the deformation unit is an electro-deformation unit, the controlling the thickness of the deformation unit in the display device according to the detected distance comprises:
calculating a distance h from the display panel to the grating structure according to a formula h/L=p/T, wherein L is a distance from the viewer to the grating structure, p is a pixel width of the display panel, and T is a pupillary distance of the viewer;
controlling an electric field applied to the electro-deformation unit, to make the distance between the display panel and the grating structure to be h;
or,
the deformation unit in the display device is a magneto-deformation unit, the magneto-deformation unit comprises two electrodes opposite to each other and a magnetostrictive material between the two electrodes;
the controlling the thickness of the deformation unit according to the detected distance comprises:
calculating a distance h from the display panel to the grating structure according to a formula h/L=p/T, wherein L is a distance from the viewer to the grating structure, p is a pixel width of the display panel, and T is a pupillary distance of the viewer;
controlling a magnitude of an alternating current signal applied to the two electrodes of the magneto-deformation unit to control an intensity of a magnetic field between the two electrodes, to control the magnetostrictive material to adjust the thickness of the magnetostrictive material in the direction from the display panel to the grating structure, to make the distance between the display panel and the grating structure to be h.

Assignees

• Fuzhou Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Hu Guiguang
• Lu Junxiang
• Sun Shaojun
• Ye Xuefang
• Li Tan
• Liu Chengjun
• Yin Junyao
• Lin Xiangdong
• Chi Yanfei
• Chen Xia

Classifications

• G02B27/4227 Primary

  in image scanning systems · CPC title

• G02B30/31

  involving active parallax barriers (involving directional light or back-light sources G02B30/33) · CPC title

• G02F1/133504

  Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606) · CPC title

• H04N13/373

  for tracking forward-backward translational head movements, i.e. longitudinal movements · CPC title

• H04N2213/001

  Constructional or mechanical details · CPC title