Method of reducing color breakup of reflection of ambient light in display panel, display panel, display apparatus, and method of fabricating display panel

Patent metadata

Field	Value
Publication number	US-11895867-B2
Application number	US-201917047925-A
Country	US
Kind code	B2
Filing date	Dec 17, 2019
Priority date	Dec 17, 2019
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A method of reducing color breakup of reflection of ambient light in a display panel having a color breakup-prevention structure is provided. The color breakup-prevention structure includes a high refractive index lens layer on a side of a plurality of light emitting elements away from a base substrate; a low refractive index modulation layer on a side of the high refractive index lens layer away from the base substrate; a first color filter layer in a plurality of subpixel regions, and spaced apart from the high refractive index lens layer by the low refractive index modulation layer; and a first black matrix layer in an inter-subpixel region, and spaced apart from the high refractive index lens layer by the low refractive index modulation layer. The high refractive index lens layer includes a plurality of lens portions spaced apart from each other and respectively in the plurality of subpixels.

First claim

What is claimed is:

1. A method of reducing color breakup of reflection of ambient light in a display panel;
wherein the display panel comprises:
a base substrate;
a plurality of light emitting elements on the base substrate and respectively in a plurality of subpixels; and
a color breakup-prevention structure configured to reduce color breakup of reflection of ambient light in the plurality of subpixels;
wherein the color breakup-prevention structure comprises:
a high refractive index lens layer on a side of the plurality of light emitting elements away from the base substrate;
a low refractive index modulation layer on a side of the high refractive index lens layer away from the base substrate;
a first color filter layer in a plurality of subpixel regions, and spaced apart from the high refractive index lens layer by the low refractive index modulation layer; and
a first black matrix layer in an inter-subpixel region, and spaced apart from the high refractive index lens layer by the low refractive index modulation layer;
wherein the high refractive index lens layer has a first refractive index;
the low refractive index modulation layer has a second refractive index smaller than the first refractive index;
the low refractive index modulation layer is substantially transparent and substantially free of a chromogenic material; and
the high refractive index lens layer comprises a plurality of lens portions spaced apart from each other and respectively in the plurality of subpixels;
wherein the method of reducing color breakup of reflection of ambient light comprises:
refracting a first incident ambient light beam at a first interface between a respective one of the plurality of lens portions and a first medium on a side of the respective one of the plurality of lens portions away from the respective one of the plurality of light emitting elements, to generate a first refracted light beam having a direction altered from a direction of a light beam in the first medium;
reflecting the first refracted light beam by a reflective structure in a respective one of the plurality of light emitting elements to generate a first reflected light beam to continue transmitting through at least the first medium, resulting in a first residual portion arriving at the first black matrix layer; and
at least partially absorbing the first residual portion of the first reflected light beam by the first black matrix layer;
wherein the method further comprises:
refracting a second incident ambient light beam at the first interface, to generate a second refracted light beam having a direction altered from the direction of the light beam in the first medium;
reflecting the second refracted light beam by the reflective structure in the respective one of the plurality of light emitting elements to generate a second reflected light beam to continue transmitting through at least the first medium, resulting in a second residual portion arriving at the first color filter layer in a first adjacent subpixel adjacent to a subpixel having the respective one of the plurality of light emitting elements; and
at least partially absorbing the second residual portion of the second reflected light beam by the first color filter layer in the first adjacent subpixel;
wherein the first color filter layer in the first adjacent subpixel has a color different from a color of the first color filter layer in the subpixel having the respective one of the plurality of light emitting elements;
wherein the color breakup-prevention structure comprises:
a second color filter layer in the plurality of subpixel regions, and spaced apart from the low refractive index modulation layer by the high refractive index lens layer; and
a second black matrix layer in the inter-subpixel region, and spaced apart from the low refractive index modulation layer by the high refractive index lens layer;
wherein the method further comprises:
refracting a third incident ambient light beam at an interface between the high refractive index lens layer and the first medium, to generate a third refracted light beam having a direction altered from the direction of the light beam in the first medium;
at least partially absorbing the third refracted light beam by the second color filter layer in the subpixel having the respective one of the plurality of light emitting elements;
reflecting the third refracted light beam by the reflective structure in the respective one of the plurality of light emitting elements to generate a third reflected light beam, the third reflected light beam transmitting along a direction toward a second adjacent subpixel adjacent to the subpixel having the respective one of the plurality of light emitting elements; and
at least partially absorbing the third reflected light beam by the second color filter layer in the subpixel having the respective one of the plurality of light emitting elements;
wherein the first color filter layer in the second adjacent subpixel has a color different from a color of the second color filter layer in the subpixel having the respective one of the plurality of light emitting elements.

2. The method of claim 1 , further comprising reflecting a fourth incident ambient light beam at the first interface to generate a fourth reflected light beam, the fourth reflected light beam transmitting along a direction toward the first black matrix layer; and
at least partially absorbing the fourth reflected light beam by the first black matrix layer.

3. The method of claim 2 , further comprising reflecting a fifth incident ambient light beam at the first interface to generate a fifth reflected light beam, the fifth reflected light beam transmitting along a direction toward the first color filter layer in a third adjacent subpixel adjacent to the subpixel having the respective one of the plurality of light emitting elements; and
at least partially absorbing the fifth reflected light beam by the first color filter layer in the third adjacent subpixel;
wherein the first color filter layer in the third adjacent subpixel has a color different from a color of the first color filter layer in the subpixel having the respective one of the plurality of light emitting elements.

4. The method of claim 1 , further comprising:
emitting a light beam from the respective one of the plurality of light emitting elements away from the base substrate and toward the color filter layer; and
converging the light beam by at least the respective one of the plurality of lens portions, thereby enhancing light extraction efficiency of the display panel.

5. The method of claim 1 , further comprising:
refracting a sixth incident ambient light beam at the first interface to generate a fourth refracted light beam, the fourth refracted light beam transmitting along a direction toward a pixel definition layer defining a plurality of subpixel apertures respectively in a plurality of subpixels; and
at least partially absorbing the fourth refracted light beam by the pixel definition layer;
wherein the pixel definition layer is made of a light absorbing material.

6. The method of claim 1 , prior to refracting the first incident ambient light beam at the first interface, further comprising refracting an incident ambient light beam at a second interface between a respective one of a plurality of cavity chambers and a second medium on a side of the respective one of the plurality of cavity chambers away from the respective one of the plurality of lens portions to generate the first incident ambient light beam;
wherein the plurality of cavity chambers are spaced apart from each other, and respectively cover the plurality of lens portions;
the respective one of the plurality of cavity chambers spaces apart the respective one of the plura

Assignees

• Boe Technology Group Co Ltd

Inventors

• Sui Kai
• Sun Zhongyuan
• Gao Yupeng
• Dong Chao
• Xu Chuanxiang

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K50/858 Primary

  comprising refractive means, e.g. lenses · CPC title

• H10K59/879 Primary

  comprising refractive means, e.g. lenses · CPC title

• H10K50/856

  comprising reflective means · CPC title