Reflective type display device

Patent metadata

Field	Value
Publication number	US-9835901-B2
Application number	US-201514785587-A
Country	US
Kind code	B2
Filing date	Apr 27, 2015
Priority date	Sep 23, 2014
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

An embodiment of the present invention discloses a reflective type display device, relating to the technical field of display. The liquid crystal display device is relatively thin and light, with low energy consumption. The reflective type display device comprises a polarizer, a transparent first substrate, a liquid crystal molecular layer and a second substrate arranged in sequence; wherein the reflective type display device further comprises: a selective reflecting layer located between the liquid crystal molecular layer and the second substrate; the selective reflecting layer reflects light with wavelength within a specific wavelength range.

First claim

The invention claimed is:

1. A reflective type display device comprising:
a polarizer;
a transparent first substrate;
a liquid crystal molecular layer;
a second substrate; and
a selective reflecting layer;
wherein the polarizer, the transparent first substrate, the liquid crystal molecular layer, and the second substrate are arranged in sequence;
wherein the selective reflecting layer is located between the liquid crystal molecular layer and the second substrate;
wherein the selective reflecting layer reflects light with wavelength within a specific wavelength range;
wherein the selective reflecting layer comprises: a first portion, wherein the first portion reflects light with wavelength within red wavelength range; a second portion, wherein the second portion reflects light with wavelength within green wavelength range; and a third portion, wherein the third portion reflects light with wavelength within blue wavelength range; and
wherein the first portion of the selective reflecting layer, the second portion of the selective reflecting layer, and the third portion of the selective reflecting layer transmit light with wavelength within a wavelength range not reflected; and wherein the first portion of the selective reflecting layer, the second portion of the selective reflecting layer, and the third portion of the selective reflecting layer are electrically conductive.

2. The reflective type display device of claim 1 wherein the first portion of the selective reflecting layer is made of silver nanoparticle coated with silver coating;
wherein the second portion of the selective reflecting layer is made of titanium dioxide nanoparticle coated with silver coating;
wherein the third portion of the selective reflecting layer is made of silicon nanoparticle coated with silver coating.

3. The reflective type display device of claim 1 further comprising:
a quarter-wave plate located between the polarizer and the first substrate;
an insulating layer;
a thin film transistor wherein the thin film transistor comprises a drain;
a passivation layer; and
a pixel electrode;
wherein the insulating layer, the thin film transistor, the passivation layer, and the pixel electrode are arranged on the selective reflecting layer in sequence;
wherein the selective reflecting layer is located on the second substrate;
wherein the pixel electrode is connected with the drain of the thin film transistor through a via hole on the passivation layer.

4. The reflective type display device of claim 2 further comprising:
a quarter-wave plate located between the polarizer and the first substrate;
an insulating layer;
a thin film transistor wherein the thin film transistor comprises a drain;
a passivation layer; and
a pixel electrode;
wherein the insulating layer, the thin film transistor, the passivation layer, and the pixel electrode are arranged on the selective reflecting layer in sequence;
wherein the selective reflecting layer is located on the second substrate;
wherein the pixel electrode is connected with the drain of the thin film transistor through a via hole on the passivation layer.

5. The reflective type display device of claim 1 further comprising:
a quarter-wave plate located between the polarizer and the first substrate;
a thin film transistor wherein the thin film transistor comprises a drain; and
a passivation layer:
wherein the thin film layer and the passivation layer are arranged on the second substrate;
wherein the selective reflecting layer is located on the passivation layer;
wherein the selective reflecting layer is connected with the drain of the thin film transistor through a via on the passivation layer.

6. The reflective type display device of claim 1 further comprising:
an insulating layer;
a thin film transistor wherein the thin film transistor comprises a drain;
a common electrode;
a passivation layer; and
a pixel electrode;
wherein the elective reflecting layer is located on the second substrate;
wherein the insulating layer is arranged on the selective reflecting layer;
wherein the thin film transistor, the common electrode, the passivation layer, and the pixel electrode are arranged on the insulating layer;
wherein the pixel electrode is connected with the drain of the thin film transistor through a via hole on the passivation layer;
wherein at least one of the common electrode and the pixel electrode comprises slits.

7. The reflective type display device of claim 2 further comprising:
an insulating layer;
a thin film transistor wherein the thin film transistor comprises a drain;
a common electrode;
a passivation layer; and
a pixel electrode;
wherein the elective reflecting layer is located on the second substrate;
wherein the insulating layer is arranged on the selective reflecting layer;
wherein the thin film transistor, the common electrode, the passivation layer, and the pixel electrode are arranged on the insulating layer;
wherein the pixel electrode is connected with the drain of the thin film transistor through a via hole on the passivation layer;
wherein at least one of the common electrode and the pixel electrode comprises slits.

8. The reflective type device of claim 1 further comprising:
a common electrode;
a thin film transistor wherein the thin film transistor comprises a drain; and
a passivation layer;
wherein the common electrode, the thin film transistor, and the passivation layer are arranged on the second substrate;
wherein the selective reflecting layer is located on the passivation layer;
wherein the selective reflecting layer is connected with the drain of the thin film transistor through a via hole on the passivation layer;
wherein at least one of the selective reflecting layer and the common electrode comprises slits.

9. The reflective type display device of claim 1 further comprising:
a thin film transistor wherein the thin film transistor comprises a drain;
a passivation layer; and
a pixel electrode;
wherein the thin film transistor, the passivation layer, and the pixel electrode are arranged on the second substrate;
wherein the pixel electrode is connected with the drain of the thin film transistor though a via hole on the passivation layer;
wherein at least one of the selective reflecting layer and the pixel electrode comprises slits.

10. The reflective type display device of claim 2 further comprising:
a thin film transistor wherein the thin film transistor comprises a drain;
a passivation layer; and
a pixel electrode;
wherein the thin film transistor, the passivation layer, and the pixel electrode are arranged on the second substrate;
wherein the pixel electrode is connected with the drain of the thin film transistor though a via hole on the passivation layer;
wherein at least one of the selective reflecting layer and the pixel electrode comprises slits.

11. The reflective type display device of claim 1 wherein a black matrix with a grid shape is arranged on a surface of the first substrate close to the liquid crystal molecular layer;
wherein the black matrix covers positions where the first portion of the selective reflecting layer, the second portion of the selective reflecting layer, and the third portion of the selective reflecting layer neighbor each other.

12. The reflective type display device of claim 1 wherein the second substrate is one of transparent or opaque;
wherein an absorption layer is arranged on a surface of the second substrate apart from the liquid crystal molecular layer when the second substrate is transparent to absorb light penetrating the selective reflecting layer and the second substrat

Assignees

• Boe Technology Group Co Ltd
• Chengdu Boe Optoelect Tech Co

Inventors

• Zuo Xiongcan
• Zhang Junrui

Classifications

• G02F1/133345

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title

• G02F2203/055

  wavelength filtering · CPC title

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F2413/05

  Single plate on one side of the LC cell · CPC title

• G02F1/133555 Primary

  Transflectors · CPC title