Display device

Patent metadata

Field	Value
Publication number	US-10962836-B2
Application number	US-201916594067-A
Country	US
Kind code	B2
Filing date	Oct 6, 2019
Priority date	Apr 9, 2019
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

A display device includes a first display panel, a second display panel, a quantum dot layer and a backlight module. The first display panel includes a first substrate, a second substrate, and a first display medium layer disposed between the second substrate and the first substrate. The second display panel includes a third substrate, a fourth substrate and a second display medium layer disposed between the third substrate and the fourth substrate. The quantum dot layer is disposed between the second substrate and the fourth substrate, and the quantum dot layer has multiple first quantum dot particles, multiple second quantum dot particles and multiple diffusing particles dispersed therein. The backlight module is located at a side of the second display panel.

First claim

What is claimed is:

1. A display device, comprising:
a first display panel, comprising a first substrate, a second substrate and a first display medium layer disposed between the second substrate and the first substrate;
a second display panel, comprising a third substrate, a fourth substrate and a second display medium layer disposed between the third substrate and the fourth substrate, the first display panel and the second display panel being mutually stacked in a manner that the second substrate and the fourth substrate are located between the first substrate and the third substrate;
a quantum dot layer, disposed between the second substrate and the fourth substrate, the quantum dot layer comprising multiple first quantum dot particles, multiple second quantum dot particles and multiple diffusing particles dispersed therein; and
a backlight module, located at a side of the second display panel away from the first display panel, wherein a light emitted by the backlight module passes through the second display panel and then the quantum dot layer for incidence to the first display panel.

2. The display device according to claim 1 , wherein the first display panel further comprises a first polarization layer and a second polarization layer, the second display panel further comprises a third polarization layer and a fourth polarization layer, the first display medium layer is located between the first polarization layer and the second polarization layer, the second display medium layer is located between the third polarization layer and the fourth polarization layer, the quantum dot layer is located between the second polarization layer and the fourth polarization layer, and both the first display panel and the second display panel are located between the first polarization layer and the third polarization layer.

3. The display device according to claim 2 , wherein the second polarization layer is disposed between the second substrate and the quantum dot layer.

4. The display device according to claim 2 , wherein the fourth polarization layer is disposed between the fourth substrate and the quantum dot layer.

5. The display device according to claim 2 , wherein the fourth polarization layer is disposed between the fourth substrate and the second display medium layer.

6. The display device according to claim 5 , wherein the fourth substrate is disposed between the fourth polarization layer and the quantum dot layer, and the quantum dot layer contacts with the fourth substrate.

7. The display device according to claim 1 , further comprising a first adhesive layer that adheres the quantum dot layer to one of the first display panel and the second display panel.

8. The display device according to claim 7 , further comprising a second adhesive layer that adheres the quantum dot layer to the other of the first display panel and the second display panel.

9. The display device according to claim 1 , wherein the backlight module is used for emitting initial light towards the second display panel, the initial light is converted to have a first wavelength range after passing through the first quantum dot particles and is converted to have a second wavelength range after passing through the second quantum dot particles, the initial light has a third wavelength range, and a third part of the initial light still has the third wavelength range after passing through the diffusing particles, the first wavelength range, the second wavelength range and the third wavelength range being different from one another.

10. The display device according to claim 1 , wherein the first display panel further comprises a first pixel array layer disposed between the second substrate and the first display medium layer, and the second display panel further comprises a second pixel array layer disposed between the third substrate and the second display medium layer.

11. The display device according to claim 10 , wherein a first pixel disposing density of the first pixel array layer is different from a second pixel disposing density of the second pixel array layer.

12. The display device according to claim 10 , wherein the quantum dot layer comprises multiple first quantum dot pixels, multiple second quantum dot pixels and multiple third quantum dot pixels, the first pixel array layer comprises multiple first pixel electrodes, and each of the first quantum dot pixels, the second quantum dot pixels and the third quantum dot pixels corresponds to one of the first pixel electrodes.

13. The display device according to claim 12 , wherein all the first quantum dot particles are distributed in the first quantum dot pixels, all the second quantum dot particles are distributed in the second quantum dot pixels, and the diffusing particles are distributed in the first quantum dot pixels, the second quantum dot pixels and the third quantum dot pixels.

14. The display device according to claim 12 , wherein the quantum dot layer further comprises multiple spacing members, and the spacing members are disposed between every adjacent two of the first quantum dot pixels, the second quantum dot pixels and the third quantum dot pixels respectively.

15. The display device according to claim 1 , wherein the first display panel further comprises a color filter layer, and the color filter layer is disposed between the first substrate and the first display medium layer or disposed between the second substrate and the first display medium layer.

16. A display device, comprising:
a first substrate;
a second substrate, opposite to the first substrate;
a first display medium layer, disposed between the first substrate and the second substrate;
a third substrate, the second substrate being located between the first substrate and the third substrate;
a second display medium layer, disposed between the second substrate and the third substrate;
a quantum dot layer, located between the first display medium layer and the second display medium layer, the quantum dot layer comprising multiple first quantum dot pixels, multiple second quantum dot pixels and multiple third quantum dot pixels, each of the first quantum dot pixels comprising multiple first quantum dot particles, each of the second quantum dot pixels comprising multiple second quantum dot particles, and each of the first quantum dot pixels, the second quantum dot pixels and the third quantum dot pixels comprising multiple diffusing particles;
a fourth substrate, the fourth substrate being located between the second display medium layer and the quantum dot layer; and
a backlight module, disposed at a side of the third substrate away from the second display medium layer, wherein a light emitted by the backlight module passes through the second display medium layer and then the quantum dot layer for incidence to the first display medium layer.

17. The display device according to claim 16 , further comprising a first pixel array layer, wherein the first pixel array layer is disposed between the second substrate and the first display medium layer, the first pixel array layer comprises multiple first pixel electrodes, and each of the first quantum dot pixels, the second quantum dot pixels and the third quantum dot pixels corresponds to one of the first pixel electrodes.

18. The display device according to claim 17 , further comprising a second pixel array layer, wherein the second pixel array layer is disposed between the third substrate and the second display medium layer, the second pixel array layer comprises multiple second pixel electrodes, and each of the first quantum d

Assignees

• Au Optronics Corp

Inventors

• Wang Hung-I
• Yu Ti-Kuei
• Wu Chia-Jung

Classifications

• G02F1/13362 Primary

  providing polarized light, e.g. by converting a polarisation component into another one · CPC title

• G02F1/136222

  Colour filters incorporated in the active matrix substrate · CPC title

• G02F1/133617 Primary

  Illumination with ultraviolet light; Luminescent elements or materials associated to the cell · CPC title

• G02F1/133614

  using photoluminescence, e.g. phosphors illuminated by UV or blue light · CPC title

• G02F1/133514

  Colour filters · CPC title