US 12,538,620 B2Granted

Light emitting substrate, method for manufacturing thereof, and display apparatus

AssigneesBOE MLED Technology Co., Ltd., Boe Technology Group Co., Ltd.

InventorsHonghao Yu, Yutao Hao, Donglei Li, Ying Chen, Jie Gao, Jiaxin Li, Pei Qin, Lili Jia

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Abstract

Provided are a light emitting substrate, a method for manufacturing same, and a display apparatus. The light emitting substrate includes a base substrate; a plurality of light emitting units located at a side of the base substrate; a plurality of protective structures located at a side of the plurality of light emitting units facing away from the base substrate; the plurality of protective structures each covers a respective one of the plurality of light emitting units; and a plurality of reflective patterns located at a side of the plurality of protective structures facing away from the plurality of light emitting units; orthographic projections of the plurality of reflective patterns on the base substrate fall within orthographic projections of the plurality of protective structures on the base substrate.

Claims13

Dependent claims

A light emitting substrate, comprising:

a base substrate;
a plurality of light emitting units located at a side of the base substrate;
a plurality of protective structures located at a side of the plurality of light emitting units facing away from the base substrate, wherein the plurality of protective structures each covers a respective one of the plurality of light emitting units;
and
a plurality of reflective patterns located at a side of the plurality of protective structures facing away from the plurality of light emitting units, wherein orthographic projections of the plurality of reflective patterns on the base substrate fall within orthographic projections of the plurality of protective structures on the base substrate respectively;
wherein surfaces of sides of the plurality of protective structures facing away from the base substrate are first curved surfaces;
the plurality of reflective patterns are in direct contact with the surfaces of the plurality of protective structures;
surfaces of sides of the plurality of reflective patterns facing away from the plurality of protective structures are second curved surfaces;
and
a shape of the second curved surface is the same as a shape of a partial region of the first curved surface;
wherein shapes of the orthographic projections of the plurality of protective structures on the base substrate are circles;
and
a contact surface between the reflective pattern and a corresponding protective structure intersects a plurality of planes perpendicular to the base substrate to form a plurality of arcs, and an arc length l of an arc having a maximum length in the plurality of arcs satisfies:
l
=
π
⁡
(
4
⁢
h
2
+
D
2
)
⁢
ar
⁢
cos
[
(
R
-
h
)
⁢
tan
2
⁢
θ
+
(
R
-
h
)
2
-
h
⁡
(
h
-
2
⁢
R
)
⁢
(
1
+
tan
2
⁢
θ
)
R
⁡
(
1
+
tan
2
⁢
θ
)
]
1
⁢
4
⁢
4
⁢
0
⁢
h
,
wherein h is a maximum size of the protective structure in a direction perpendicular to the base substrate, D is a diameter of the orthographic projection of the protective structure on the base substrate, R is a radius of a spherical surface where the surface of the side of the protective structure facing away from the base substrate is located, and θ is a half-power angle of the light emitting unit.

86 more elements

A method for manufacturing a light emitting substrate, wherein the method comprises:

arranging a plurality of light emitting units at a side of a base substrate;
forming a plurality of protective structures at a side of the plurality of light emitting units facing away from the base substrate, wherein the plurality of protective structures each covers a respective one of the plurality of light emitting units;
and
forming reflective patterns at a side of the plurality of protective structures facing away from the plurality of light emitting units, wherein orthographic projections of the plurality of reflective patterns on the base substrate fall within orthographic projections of the plurality of protective structures on the base substrate;
wherein surfaces of sides of the plurality of protective structures facing away from the base substrate are first curved surfaces;
the plurality of reflective patterns are in direct contact with the surfaces of the plurality of protective structures;
surfaces of sides of the plurality of reflective patterns facing away from the plurality of protective structures are second curved surfaces;
and
a shape of the second curved surface is the same as a shape of a partial region of the first curved surface;
wherein shapes of the orthographic projections of the plurality of protective structures on the base substrate are circles;
and
a contact surface between the reflective pattern and a corresponding protective structure intersects a plurality of planes perpendicular to the base substrate to form a plurality of arcs, and an arc length l of an arc having a maximum length in the plurality of arcs satisfies:
l
=
π
⁡
(
4
⁢
h
2
+
D
2
)
⁢
arcos
[
(
R
-
h
)
⁢
tan
2
⁢
θ
+
(
R
-
h
)
2
-
h
⁡
(
h
-
2
⁢
R
)
⁢
(
1
+
tan
2
⁢
θ
)
R
⁡
(
1
+
tan
2
⁢
θ
)
]
1
⁢
4
⁢
4
⁢
0
⁢
h
,
wherein h is a maximum size of the protective structure in a direction perpendicular to the base substrate, D is a diameter of the orthographic projection of the protective structure on the base substrate, R is a radius of a spherical surface where the surface of the side of the protective structure facing away from the base substrate is located, and θ is a half-power angle of the light emitting unit.

83 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/028,467Filed 27 May 2022
Published: US 2025/0081692 A16 Mar 2025
Granted: 27 Jan 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

H10H 20/856
Optical field-shaping means, e.g. lenses: reflecting means
H10H 29/856
Optical field-shaping means, e.g. lenses: reflecting means
G02F 1/1335
Constructional arrangements; Manufacturing methods: structural association of cells with optical devices, e.g. polarisers or reflectors
G02F 1/1336
Structural association of cells with optical devices, e.g. polarisers or reflectors: illuminating devices