US 2026/0259449 A1Published application

Display device and method of manufacturing the same

AssigneesBeijing Boe Display Technology Co., Ltd., Boe Technology Group Co., Ltd., Beijing BOE Technology Development Co., Ltd.

InventorsTingxiu Hou, Xiuyun Chen, Peng Zhong, Jingjun Du, Yaxin Sun, Qianqian Hao, Ziyan Zhang, Weibo Li, Cunqing Guo, Yichi Zhang

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Abstract

A display device is provided, including: a base substrate; a reflective assembly including an upper surface with protruding portions, and a side tangent of the protruding portion has a first angle with the upper surface; a display assembly including a liquid crystal layer having a first refractive index; and a light emitting assembly including: a light guide plate having a second refractive index, where the light guide plate includes an upper surface and a peripheral surface, the light guide plate upper end surface is provided with first recessed portions recessed in a direction towards the base substrate, and an inclined side surface of the first recessed portion has a second angle with the upper surface of the light guide plate; and a light source configured to emit a light ray towards the peripheral surface, and the light ray has a third angle with peripheral surface.

Claims26

Dependent claims

A display device, comprising:

a base substrate;
a reflective assembly on a side of the base substrate, wherein the reflective assembly comprises a reflective assembly upper end surface away from the base substrate, the reflective assembly upper end surface is provided with a plurality of protruding portions, a side tangent of the protruding portion has a first angle θ1 with the reflective assembly upper end surface, and the side tangent is a tangent of a side edge between a lowest point and a highest point of the protruding portion at a midpoint position;
a display assembly on a side of the reflective assembly away from the base substrate, wherein the display assembly comprises a liquid crystal layer having a first refractive index n1;
and
a light emitting assembly on a side of the display assembly away from the base substrate, wherein the light emitting assembly comprises:
a light guide plate having a second refractive index n2, wherein the light guide plate comprises a light guide plate upper end surface away from the base substrate and a light guide plate peripheral side surface, the light guide plate upper end surface is provided with a plurality of first recessed portions recessed in a direction towards the base substrate, and an inclined side surface of the first recessed portion facing the light guide plate peripheral side surface has a second angle θ2 with the light guide plate upper end surface;
and
a light source opposite to the light guide plate peripheral side surface, wherein the light source is configured to emit a light ray towards the light guide plate peripheral side surface, and the light ray has a third angle θ3 with the light guide plate peripheral side surface,
wherein the second angle θ2 meets a relationship of:
⊖
2
=
90
o
-
1
2
[
arccos
⁡
(
1
n
2
×
sin
⁢
θ
3
)
+
arc
⁢
sin
⁢
(
n
1
n
2
×
sin
⁢
2
⊖
1
)
]
.

46 more elements

A method of manufacturing a display device, comprising:

providing a base substrate;
forming a reflective assembly on a side of the base substrate, wherein the reflective assembly comprises a reflective assembly upper end surface away from the base substrate, the reflective assembly upper end surface is provided with a plurality of protruding portions, a side tangent of the protruding portion has a first angle θ1 with the reflective assembly upper end surface, and the side tangent is a tangent of a side edge between a lowest point and a highest point of the protruding portion at a midpoint position;
forming a display assembly on a side of the reflective assembly away from the base substrate, wherein the display assembly comprises a liquid crystal layer having a first refractive index n1;
forming a light emitting assembly on a side of the display assembly away from the base substrate, wherein the forming a light emitting assembly comprises:
forming a light guide plate having a second refractive index n2, wherein the light guide plate comprises a light guide plate upper end surface away from the base substrate and a light guide plate peripheral side surface, the light guide plate upper end surface is provided with a plurality of first recessed portions recessed in a direction towards the base substrate, and an inclined side surface of the first recessed portion facing the light guide plate peripheral side surface has a second angle θ2 with the light guide plate upper end surface;
and
forming a light source at a position opposite to the light guide plate peripheral side surface, wherein the light source is configured to emit a light ray towards the light guide plate peripheral side surface, and the light ray has a third angle θ3 with the light guide plate peripheral side surface,
wherein the second angle θ2 meets a relationship of:
⊖
2
=
90
o
-
1
2
[
arccos
⁡
(
1
n
2
×
sin
⁢
θ
3
)
+
arc
⁢
sin
⁢
(
n
1
n
2
×
sin
⁢
2
⊖
1
)
]
.

45 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/995,815Filed 14 May 2024
Priority: CN 202310749147.X21 Jun 2023
Published: 3 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification25 codes

G02F 1/133553
Structural association of cells with optical devices, e.g. polarisers or reflectors: reflecting elements
G02B 6/00
Light guides
G02B 6/002
Provided on the surface of the light guide or in the bulk of it: by shaping at least a portion of the light guide, e.g. with collimating,…
G02B 6/0036
Provided on the surface of the light guide or in the bulk of it: 2-D arrangement of prisms, protrusions, indentations or roughened surfaces