Pixel structure, display substrate and control method thereof, display device

Patent metadata

Field	Value
Publication number	US-10679573-B2
Application number	US-201815923245-A
Country	US
Kind code	B2
Filing date	Mar 16, 2018
Priority date	Sep 15, 2017
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

The present disclosure discloses a pixel structure, including a reflective layer, a reflective electrode, a flexible electrode and a bottom electrode sequentially disposed along a direction of incident light. An optical resonant cavity is formed between the reflective layer and the reflective electrode, the reflective layer and the flexible electrode are connected to each other; and a first voltage is loaded between the reflective electrode and the flexible electrode, and a second voltage is loaded between the flexible electrode and the bottom electrode; depending on at least one of changes of the first voltage and the second voltage, the flexible electrode deforms along the direction of incident light, and drives the reflective layer to move along the direction of incident light. The present disclosure also discloses a display substrate and a control method thereof and a display device.

First claim

What is claimed is:

1. A pixel structure, comprising a reflective layer, a reflective electrode, a flexible electrode and a bottom electrode sequentially disposed along a direction of incident light, wherein an optical resonant cavity is formed between the reflective layer and the reflective electrode, wherein the reflective layer and the flexible electrode are connected to each other; and
wherein a first voltage is loaded between the reflective electrode and the flexible electrode, and a second voltage is loaded between the flexible electrode and the bottom electrode; depending on at least one of changes of the first voltage and the second voltage, the flexible electrode deforms along the direction of incident light, and drives the reflective layer to move along the direction of incident light, such that a color of a light emitted from the optical resonant cavity is changeable, and
a through hole is provided at a center of the reflective electrode, the reflective layer and the flexible electrode are connected via a connecting pillar, and the connecting pillar passes through the through hole.

2. The pixel structure according to claim 1 , wherein the reflective layer is a resonant absorption layer.

3. The pixel structure according to claim 2 , wherein the resonant absorption layer is a transparent reflective material formed with a chrome metal film layer.

4. The pixel structure according to claim 1 , further comprising a first base substrate and a first supporting pillar, wherein the bottom electrode is disposed on the first base substrate, the first supporting pillar is disposed on the first base substrate and at the same side of the first base substrate as the bottom electrode, the reflective electrode is disposed on the top of the first supporting pillar, and the flexible electrode is disposed on and supported by the first supporting pillar between the bottom electrode and the reflective electrode.

5. The pixel structure according to claim 4 , further comprising a second base substrate and a second supporting pillar, wherein the reflective layer is made of an elastic material, and an edge of the reflective layer is secured on the base substrate via the second supporting pillar.

6. A display substrate, comprising at least one pixel unit, the pixel unit comprising three pixel structures, separated by a pixel defining layer, and each comprising: a reflective layer, a reflective electrode, a flexible electrode and a bottom electrode sequentially disposed along a direction of incident light, wherein an optical resonant cavity is formed between the reflective layer and the reflective electrode, the reflective layer and the flexible electrode are connected to each other; and
wherein a first voltage is loaded between the reflective electrode and the flexible electrode, and a second voltage is loaded between the flexible electrode and the bottom electrode; depending on at least one of changes of the first voltage and the second voltage, the flexible electrode deforms along the direction of incident light, and drives the reflective layer to move along the direction of incident light, such that a color of a light emitted from the optical resonant cavity is changeable, and
a through hole is provided at a center of the reflective electrode, the reflective layer and the flexible electrode are connected via a connecting pillar, and the connecting pillar passes through the through hole.

7. The display substrate according to claim 6 , further comprising a movable shielding layer, wherein the movable shielding layer is disposed on a side of an incident surface of the reflective layer and is movable horizontally in a direction perpendicular to the incident light, to change at least one of the transmittance of incident light and that of exiting light.

8. The display substrate according to claim 7 , wherein the movable shielding layer comprises three movable shielding sub-layers, and the three movable shielding sub-layers respectively block three of the pixel structures; and
the movable shielding sub-layer comprises a first shielding member and a second shielding member, a gap between the first shielding member and the second shielding member is configured to transmit at least one of incident light and exiting light, and at least one of the first shielding member and the second shielding member is movable.

9. The display substrate according to claim 8 , wherein at least one of projections of the first shielding member and the second shielding member on the reflective layer in the direction of incident light is corresponding to the position of the pixel defining layer.

10. The display substrate according to claim 8 , wherein at least one of cross-sectional shapes of the first shielding member and the second shielding member in a direction perpendicular to the incident light is at least one of rectangle, semicircle, semi-ellipse, triangle and zigzag.

11. A display device, comprising the display substrate according to claim 6 .

12. A control method applied to the display substrate according to claim 6 , comprising:
calculating a distance between the reflective layer and the reflective electrode of each of the three pixel structures according to exiting lights respectively required to be emitted by the three pixel structures of the pixel unit;
calculating at least one of a first voltage to be loaded between the reflective electrode and the flexible electrode and a second voltage to be loaded between the flexible electrode and the bottom electrode of each of the three pixel structures according to the distance between the reflective layer and the reflective electrode of each of the three pixel structures; and
loading at least one of the first voltage between the reflective electrode and the flexible electrode and the second voltage between the flexible electrode and the bottom electrode, such that the three pixel structures of the pixel unit respectively emit three different kinds of exiting lights, so as to be mixed to form a desired color for the pixel unit.

13. The method according to claim 12 , wherein the three pixel structures of the pixel unit emit red light, green light and blue light respectively.

14. The method according to claim 12 , further comprising:
calculating durations respectively for the three pixel structures emitting exiting lights in a cycle for displaying one frame of the pixel unit, according to intensities of exiting lights required to be emitted respectively from the three pixel structures of the pixel unit; and
respectively controlling the three pixel structures to emit light of the corresponding color according to the durations respectively for the three pixel structures emitting exiting lights.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Display Tech Co

Inventors

• Qu Lianjie
• Wang Zhidong
• Zhao Hebin
• Qiu Yun
• Tong Weiwei
• Jia Ning

Classifications

• G09G3/3607 Primary

  for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127) · CPC title

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• G09G2300/0478

  related to liquid crystal pixels · CPC title

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title