Display panel, manufacturing method thereof, and display device

Patent metadata

Field	Value
Publication number	US-10989953-B2
Application number	US-201715776392-A
Country	US
Kind code	B2
Filing date	Sep 21, 2017
Priority date	Jan 13, 2017
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

Embodiments of the present disclosure provide a display panel, a method for manufacturing the same, and a display device, relating to the field of display technology. The display panel includes a first substrate, a second substrate, a liquid crystal layer disposed between the first substrate and the second substrate, and a light splitting structure disposed on a side of the first substrate facing away from the liquid crystal layer. The light splitting structure is configured to perform spectroscopic processing on light incident on the light splitting structure to obtain light of at least one color, and project the light of the at least one color onto a pixel of a corresponding color in the display panel.

First claim

What is claimed is:

1. A display panel, comprising:
a first substrate, a second substrate, a liquid crystal layer disposed between the first substrate and the second substrate, a light splitting structure disposed on a side of the first substrate facing away from the liquid crystal layer, and a polarization structure disposed on the light splitting structure or on the first substrate;
wherein the light splitting structure is configured to perform spectroscopic processing on light incident on the light splitting structure to obtain light of at least one color, and project the light of the at least one color onto a pixel of a corresponding color in the display panel;
wherein the light splitting structure comprises a nanometer light splitting film, the nanometer light splitting film comprises a plurality of light splitting modules arranged in an array, and each of the plurality of light splitting modules comprises a multi-step grating element;
wherein the multi-step grating element comprises a plurality of steps with different heights and a same width; a period a, a step amount b, and a step width c of the multi-step grating element satisfy: b*c=a, and a step height is about 0˜10 μm,
wherein the polarization structure is configured to perform polarization processing on light incident on the polarization structure, the polarization structure comprises a wire grid polarizer, and wire grid polarizer comprises a plurality of wire grids, and the plurality of wire grids are arranged on the light splitting structure or on the first substrate in an array;
and wherein a width e of the wire grid and a step width c of the multi-step grating element satisfy: e*m=c, m is a positive integer, the width of the wire grid is about 10˜200 nm, and a duty ratio of the wire grid is about 50%.

2. The display panel according to claim 1 , further comprising: a diffusion film disposed on aside of the second substrate facing away from the liquid crystal layer.

3. The display panel according to claim 1 , wherein a step surface of the nanometer light splitting film faces the first substrate;
a wire grid polarizer is integrally disposed on a side of the nanometer light splitting film facing the first substrate, a refractive index of the nanometer light splitting film is different from a refractive index of the wire grid polarizer, and the refractive index of the nanometer light splitting film is greater than a refractive index of air; alternatively, the wire grid polarizer is integrally disposed on a side of the nanometer light splitting film facing away from the first substrate, and a refractive index of the nanometer light splitting film is greater than a refractive index of air.

4. The display panel according to claim 1 , further comprising: a collimated backlight disposed at a side of the light splitting structure facing away from the liquid crystal layer.

5. A display device comprising the display panel according to claim 1 .

6. The display device according to claim 5 , wherein a step surface of the nanometer light splitting film faces the first substrate;
a wire grid polarizer is integrally disposed on a side of the nanometer light splitting film facing the first substrate, a refractive index of the nanometer light splitting film is different from a refractive index of the wire grid polarizer, and the refractive index of the nanometer light splitting film is greater than a refractive index of air; alternatively, the wire grid polarizer is integrally disposed on a side of the nanometer light splitting film facing away from the first substrate, and a refractive index of the nanometer light splitting film is greater than a refractive index of air.

7. A method for manufacturing a display panel, comprising:
providing a first substrate and a second substrate, disposing a liquid crystal layer between the first substrate and the second substrate;
forming a light splitting structure on a side of the first substrate facing away from the liquid crystal layer; wherein the light splitting structure is configured to perform spectroscopic processing on light incident on the light splitting structure to obtain light of at least one color, and project the light of the at least one color onto a pixel of a corresponding color in the display panel; and
forming a polarization structure on the light splitting structure or on the first substrate;
wherein the light splitting structure comprises a nanometer light splitting film, the polarization structure comprises a wire grid polarizer, the nanometer light splitting film comprises a plurality of light splitting modules arranged in an array, and each of the splitting light modules comprises a multi-step grating element; the multi-step grating element comprises a plurality of steps with different heights and a same width; a step surface of the nanometer light splitting film faces the first substrate;
wherein the step of forming the polarization structure on the light splitting structure comprises:
forming the wire grid polarizer integrally on a side of the nanometer light splitting film facing the first substrate, a refractive index of the nanometer light splitting film being different from a refractive index of the wire grid polarizer, and the refractive index of the nanometer light splitting film being greater than a refractive index of air; alternatively, forming the wire grid polarizer integrally on a side of the nanometer light splitting film facing away from the first substrate, a refractive index of the nanometer light splitting film being greater than a refractive index of air.

8. The method according to claim 7 , further comprising: forming a polarization structure on the light splitting structure or on the first substrate.

9. A display panel, comprising: a first substrate, a second substrate, a liquid crystal layer disposed between the first substrate and the second substrate, and alight splitting structure disposed on a side of the first substrate facing away from the liquid crystal layer; wherein the light splitting structure is configured to perform spectroscopic processing on light incident on the light splitting structure to obtain light of at least one color, and project the light of the at least one color onto a pixel of a corresponding color in the display panel; wherein the light splitting structure comprises a nanometer light splitting film, the nanometer light splitting film comprises a plurality of light splitting modules arranged in an array, and each of the plurality of light splitting modules comprises a multi-step grating element; and wherein a distance between a surface of the nanometer light splitting film facing the first substrate and a surface of the second substrate facing the first substrate is about 50˜500 μm.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Yang Yafeng
• Wang Wei
• Chen Xiaochuan
• Dong Xue
• Tan Jifeng
• Gao Jian
• Meng Xiandong
• Meng Xianqin
• Zhao Wenqing
• Guan Feng
• Yu Lu
• Wei Congcong

Classifications

• G02B27/1006

  for splitting or combining different wavelengths (G02B27/1086, G02B27/141 take precedence) · CPC title

• G02F1/133528 Primary

  Polarisers · CPC title

• G02F1/133504 Primary

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

• G02B5/1866

  Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials (G02B5/1809, G02B5/1828, G02B5/1833, G02B5/1838 and G02B5/1847 take precedence) · CPC title

• G02F1/1333

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title