Display device and method for manufacturing the same
Provided is a display device, including a display screen, a transparent cover plate and a first light-shielding structure, wherein the display screen includes a display panel, a transparent bonding layer, a touch structure and a second light-shielding structure, and the display screen is provided with a through hole penetrating through the display panel, the transparent bonding layer and the touch structure. The first light-shielding structure is disposed on the transparent cover plate and surrounds the through hole, the second light-shielding structure is disposed on the touch structure and surrounds the through hole, and orthographic projections of both the first and second light-shielding structures onto the display panel are within the non-display region.
1. A display device, comprising:
a display screen comprising:
a display panel comprising a non-display region and a display region,
a transparent bonding layer,
a touch structure,
a second light-shielding structure, and
a through hole;
a transparent cover plate; and
a first light-shielding structure;
wherein:
the transparent bonding layer, the touch structure and the transparent cover plate are sequentially laminated on the display panel;
the through hole penetrates through the display panel, the transparent bonding layer, and the touch structure, and the non-display region surrounds the through hole and the display region surrounds the non-display region;
the first light-shielding structure is disposed on the transparent cover plate and surrounds the through hole, the second light-shielding structure is disposed on the touch structure and surrounds the through hole, an orthographic projection of the first light-shielding structure onto the display panel and an orthographic projection of the second light-shielding structure onto the display panel both are within the non-display region, wherein the second light-shielding structure is configured to shield light, emitted from the display panel and passing through the transparent bonding layer in the direction of the through hole; and the first light-shielding structure is configured to shield light, emitted from the display panel, passing through the through hole and being slantly incident on the transparent cover plate; and
the first light-shielding structure is ring-shaped, an inner diameter of the first light-shielding structure is less than a diameter of the through hole, and an outer diameter of the first light-shielding structure is greater than the diameter of the through hole.
2. The display device according to claim 1 , wherein the inner diameter of the first light-shielding structure satisfies the following relations:
D
1
≤
2
h
tan
α
-
D
0
,
and
sin
α
=
nd
a
,
wherein D 1 is the inner diameter of the first light-shielding structure, h is a vertical distance between the first light-shielding structure and the second light-shielding structure, D 0 is the diameter of the through hole, n is a refractive index of the transparent bonding layer, d is a thickness of the transparent bonding layer, and a is a minimum distance from a boundary between the non-display region and the display region to the through hole in a radial direction of the through hole.
3. The display device according to claim 1 , wherein the inner diameter of the first light-shielding structure satisfies the following relation:
D 1 ≤D 0 −2√{square root over ( m 1 2 +m 2 2 +m 3 2 )},
wherein D 1 is the inner diameter of the first light-shielding structure, D 0 is the diameter of the through hole, m 1 is a geometric tolerance of the through hole, m 2 is a fit tolerance between the transparent cover plate and the display panel, and m 3 is a geometric tolerance of the first light-shielding structure.
4. The display device according to claim 3 , wherein the inner diameter of the first light-shielding structure satisfies the following relations:
D
1
≤
min
{
2
h
tan
α
-
D
0
;
D
0
-
2
m
1
2
+
m
2
2
+
m
3
2
}
,
and
sin
α
=
nd
a
,
wherein h is a vertical distance between the first light-shielding structure and the second light-shielding structure, n is a refractive index of the transparent bonding layer, d is a thickness of the transparent bonding layer, and a is a minimum distance from a boundary between the non-display region and the display region to the through hole in a radial direction of the through hole.
5. The display device according to claim 1 , wherein the outer diameter of the first light-shielding structure satisfies the following relation:
D 1 ≤D 0 −2√{square root over ( m 1 2 +m 2 2 +m 3 2 )},
wherein D 2 is the outer diameter of the first light-shielding structure, D 0 is the diameter of the through hole, a is a minimum distance from a boundary between the non-display region and the display region to the through hole in a radial direction of the through hole, m 2 is a fit tolerance between the transparent cover plate and the display panel, and m 3 is a geometric tolerance of the first light-shielding structure.
6. The display device according to claim 1 , wherein the second light-shielding structure is ring-shaped; and an inner diameter of the second light-shielding structure is the same as a diameter of the through hole.
7. The display device according to claim 6 , wherein an outer diameter of the second light-shielding structure satisfies the following relation:
D 1 ≤D 0 −2√{square root over ( m 1 2 +m 2 2 +m 3 2 )},
wherein D 3 is the outer diameter of the second light-shielding structure, D 0 is the diameter of the through hole, a is a minimum distance from a boundary between the non-display region and the display region to the through hole in a radial direction of the through hole, m 4 is a fit tolerance between the touch structure and the display panel, and m 5 is a geometric tolerance of the second light-shielding structure.
8. The display device according to claim 1 , wherein the orthographic projection of the second light-shielding structure onto the display panel is within the orthographic projection of the first light-shielding structure onto the display panel.
9. The display device according to claim 1 , wherein the touch structure is provided with a first surface proximal to the display panel and a second surface proximal to the transparent cover plate; wherein
the second light-shielding structure is disposed on the first surface, or on the second surface, or between the first surface and the second surface.
10. The display device according to claim 9 , wherein the touch structure comprises a substrate layer, a plurality of touch electrodes, and an insulating layer; wherein
the plurality of touch electrodes are disposed on a surface of the substrate layer, the insulating layer covers the plurality of touch electrodes; and
the second light-shielding structure is disposed on the substrate layer or on the insulating layer.
11. The display device according to claim 1 , wherein a thickness of the first light-shielding structure ranges from 1 μm to 5 μm, and a thickness of the second light-shielding structure ranges from 1 μm to 5 μm.
12. The display device according to claim 1 , wherein each of the first light-shielding structure and the second light-shielding structure is made of an ink or an opaque photoresist.
13. The display device of claim 12 , wherein a photoresist layer comprises a black carbon particle.
14. A method for manufacturing a display device, the method comprising:
providing a display panel, a touch structure with a light-shielding pattern, and a transparent cover plate with a first light-shielding structure;
bonding the touch structure to the display panel by a transparent bonding layer;
forming a through hole penetrating through the display panel, the transparent bonding layer, the light-shielding pattern, and the touch structure to obtain a display screen with a second light-shielding structure, wherein the display panel is provided with a non-display region surrounding the through hole and a display region surrounding the non-display region, the second light-shielding structure comprises a remaining part of the light-shielding pattern after forming the through hole, and surrounds the through hole, and an orthographic projection of the second light-shielding structure onto the display panel is within the non-display region; and
disposing the transparent cover plate on the touch structure, such that the first light-shielding structure surrounds the through hole, wherein an orthographic projection of the first light-shielding structure onto the display panel is within the non-display region, the second light-shielding structure is configured to shield light, emitted from the display panel and passing through the transparent bonding layer in the direction of the through hole; and the first light-shielding structure is configured to shield light, emitted from the display panel, passing through the through hole and being slantly incident on the transparent cover plate;
wherein the first light-shielding structure is ring-shaped, an inner diameter of the first light-shielding structure is less than a diameter of the through hole, and an outer diameter of the first light-shielding structure is greater than the diameter of the through hole.
15. The method according to claim 14 , further comprising:
providing a substrate layer;
forming a plurality of touch electrodes on one surface of the substrate layer;
forming an insulating layer on the plurality of touch electrodes; and
forming the light-shielding pattern on at least one of the insulating layer and on the other surface of the substrate layer to obtain the touch structure.
16. The method according to claim 14 , further comprising:
providing a substrate layer;
forming a plurality of touch electrodes and the light-shielding pattern on a surface of the substrate layer; and
forming an insulating layer on the plurality of touch electrodes and the light-shielding pattern to obtain the touch structure.
17. The method according to claim 14 , wherein the second light-shielding structure is ring-shaped; and an inner diameter of the second light-shielding structure is the same as a diameter of the through hole.
18. The method according to claim 14 , wherein the orthographic projection of the second light-shielding structure onto the display panel is within the orthographic projection of the first light-shielding structure onto the display panel.