CN111221167A

CN111221167A - Display device

Info

Publication number: CN111221167A
Application number: CN202010069587.7A
Authority: CN
Inventors: 刘海燕
Original assignee: AU Optronics Kunshan Co Ltd
Current assignee: AU Optronics Kunshan Co Ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-06-02
Anticipated expiration: 2040-01-21
Also published as: CN111221167B

Abstract

The invention provides a display device, which comprises a first substrate, a second substrate and a third substrate, wherein the first substrate is provided with a first flat layer covering a display area and a peripheral area; the second substrate is provided with a shading layer, a color resistance layer and a second flat layer, the second flat layer covers the shading layer and the color resistance layer, the shading layer is provided with a plurality of openings in the display area, and the color resistance layer is accommodated in the plurality of openings respectively; the display molecule layer and the light sensing area are arranged between the first substrate and the second substrate, and the positions of the display molecule layer and the light sensing area correspond to the display area; the spacing region is arranged around the light sensing region, the spacing region is provided with a first spacing region, the second flat layer extends from the display region and is arranged in the first spacing region, the second flat layer has a first horizontal height in the display region, the second flat layer has a second horizontal height in the first spacing region, and the second horizontal height is larger than the first horizontal height.

Description

Display device

Technical Field

The present invention relates to a display device, and more particularly, to a display device having an optical sensor.

Background

With the development of technology, display devices are widely used in many electronic products, such as mobile phones, tablet computers, watches, and the like. Meanwhile, in order to meet more demands, most electronic products are provided with an element having an optical sensing function, such as a camera.

The conventional optical sensing elements are generally installed on the front and back surfaces of an electronic product, and when the optical sensing elements are installed on the front surface having a display panel, the following two methods are generally adopted: one is a through-hole mode, in which a through-hole is provided on the display panel so that the optical sensing element is directly placed under the filter glass layer. When the through hole mode is adopted, the periphery of the optical hole of the through hole is required to adopt a sealing structure so as to keep the through hole and the display area under the through hole processing completely isolated and have no liquid crystal leakage. However, the sealing structure is adhered to the upper and lower substrates by coating, and the coating process needs to consider the process precision and the diffusion width of the sealing material after pressing. Therefore, the isolation area around the through hole is large, the edge is wide, the area of the optical hole cannot be too small, and the screen occupation ratio and the use impression are affected. The other mode is a blind hole mode, a through hole is not arranged on the display panel, and the optical sensing element is directly placed below the display panel. When a blind hole mode is adopted, the central hole area is filled with liquid crystal, so that the transmittance of the central hole area is greatly lost, and the requirement of a high-configuration camera on shooting light cannot be met.

Therefore, how to make the central hole region in a vacuum state, without filling liquid crystal, and improve the transmittance of the central hole region is one of the problems to be solved.

Disclosure of Invention

The embodiment of the invention provides a display device, which can enable a central hole area to be in a vacuum state and not to be filled with liquid crystal, effectively improves the transmittance of the central hole area, and meets the requirement of a high-configuration camera on shooting light.

The display device of one embodiment of the invention comprises a first substrate, a second substrate and a third substrate, wherein the first substrate is provided with a display area and a peripheral area which are adjacent to each other, and a first flat layer covers the display area and the peripheral area; a second substrate having a light-shielding layer, a color-resisting layer and a second flat layer, wherein the color-resisting layer has a first color-resisting layer, a second color-resisting layer and a third color-resisting layer, the second flat layer covers the light-shielding layer and the color-resisting layer, the light-shielding layer has a plurality of openings in the display area, and the first color-resisting layer, the second color-resisting layer and the third color-resisting layer are respectively accommodated in the plurality of openings; the display molecular layer is arranged between the first substrate and the second substrate, and the position of the display molecular layer corresponds to the display area; a light sensing area disposed on the first substrate and the second substrate, wherein the light sensing area is located in the display area; the spacing region is arranged around the light sensing region and provided with a first spacing region, the second flat layer extends from the display region and is arranged in the first spacing region, the second flat layer has a first horizontal height in the display region, the second flat layer has a second horizontal height in the first spacing region, and the second horizontal height is larger than the first horizontal height.

In the display device, a first spacer is disposed in the first spacer region, and the first spacer is disposed on the second substrate and surrounds the photo-sensing region.

In the display device, the spacer region has a second spacer region, the first spacer region is disposed around the second spacer region, the second spacer region is disposed with a second spacer, and the second spacer is disposed around the photo-sensing region.

In the display device, the spacing region has a third spacing region, and the third spacing region is disposed between the first spacing region and the second spacing region.

In the display device, the first planarization layer extends from the display area to the first spacing area, a first opening is formed in the first planarization layer in the first spacing area, the first spacer has a first spacer and a first spacer, the first opening corresponds to the first spacer, and the first spacer is accommodated in the first opening.

In the display device, the first spacer has the first color-resisting layer, the second color-resisting layer and the third color-resisting layer which are stacked.

In the display device, the light-shielding layer is disposed in the display region and the spacing region, and the first spacer is disposed on the light-shielding layer.

In the display device, the first flat layer extends from the display area to the second spacing area, the second spacer has a second spacer and a second spacer pillar, the first flat layer in the second spacing area has a second opening, the second opening corresponds to the second spacer pillar, and the second spacer pillar is accommodated in the second opening.

In the display device, the first planarization layer has a third level in the display area, the first planarization layer has a fourth level in the second spacing area, and the fourth level is greater than or equal to the third level.

In the display device, the second spacer has the first color resist layer or the second color resist layer, which are stacked, the light shielding layer is disposed on the display area and the spacer region, and the second spacer is disposed on the light shielding layer.

In the display device, the second flat layer extends from the display area to the second spacing area, and the second flat layer in the second spacing area covers the second spacing pad and has a fifth horizontal height, where the fifth horizontal height is equal to the first horizontal height.

In the display device, the first flat layer extends from the display area to the third spacing area, and the first flat layer in the third spacing area has a sixth level between 0 and the third level.

In the display device, the second planarization layer extends from the display area to the third spacing area, and the second planarization layer in the third spacing area has a seventh level between 0 and the first level.

In the display device, the first planarization layer extends from the display area to the first spacing area, and the first planarization layer has an eighth level in the first spacing area, and the eighth level is greater than the third level.

The display device further includes an optical sensing device disposed below the second substrate, wherein a position of the optical sensing device corresponds to a position of the photosensitive region.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

Fig. 1A is a schematic structural diagram of a display device according to an embodiment of the invention.

FIG. 1B is a cross-sectional view of FIG. 1A taken along line a-a'.

Wherein, the reference numbers:

100: display device

101: first substrate

102: second substrate

103: light shielding layer

104: color resist layer

1041: first color resistance layer

1042: second color resist layer

1043: third color resist layer

105: display molecule layer

106: light sensing area

107: spacer region

1071: first spaced apart region

1072: second spacer region

1073: third spaced area

AA: display area

AD: active element array

OC 1: a first flat layer

OC 2: a second flat layer

PS 1: first spacer

PS 2: second spacer

BP 1: first spacer

BP 2: second spacer

BS 1: first spacer

BS 2: second spacer pillar

S1, S2: opening of the container

H1-H6, H8: first to sixth and eighth horizontal heights

Detailed Description

The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:

FIG. 1A is a schematic structural diagram of a display device according to an embodiment of the invention, and FIG. 1B is a sectional view taken along line a-a' of FIG. 1A. As shown in fig. 1A and 1B, the display device 100 includes a first substrate 101, a second substrate 102, and a display molecule layer 105 disposed between the first substrate 101 and the second substrate 102. In the embodiment, the first substrate 101 and the second substrate 102 are disposed opposite to each other, the first substrate 101 has a display area AA and a peripheral area (not shown) adjacent to each other, and the first substrate 101 is, for example, an active array substrate and has a multi-layer structure to form an active device array AD. In the embodiment, the first planarization layer OC1 is disposed on the first substrate 101, such that the first planarization layer OC1 covers the display area AA and the peripheral area, and in the display area AA, the first planarization layer OC1 has a third horizontal height H3, which is not described herein again. A light-shielding layer 103 is disposed on the second substrate 102 in a region corresponding to the display area AA, an opening is disposed in the light-shielding layer 103, and a color-resist layer 104 is formed in the opening of the light-shielding layer 103. The color-resist layer 104 may be composed of a first color-resist layer 1041 (e.g., color resist B), a second color-resist layer 1042 (e.g., color resist R), and a third color-resist layer 1043 (e.g., color resist G), and the first color-resist layer 1041, the second color-resist layer 1042, and the third color-resist layer 1043 are disposed in the second substrate 102 in a strip shape, so that the color-resist layer 104 may be accommodated in the opening of the light-shielding layer 103. In the embodiment shown in fig. 1B, the color resist layer 104 can be a color resist layer of three different colors, but the invention is not limited thereto, and in other embodiments, the color composition of the color resist layer can be adjusted according to different requirements, such as red, green, blue and white. Referring to fig. 1B, a second planarization layer OC2 is disposed on the second substrate 102, and the second planarization layer OC2 covers the light-shielding layer 103 and the color-resist layer 104.

With reference to fig. 1A and fig. 1B, in the present embodiment, the display device 100 further includes a photosensitive region 106 and a spacing region 107. Specifically, the photo-sensing area 106 is circular, and may be designed to be square, oval or other shapes as required, which is not limited by the invention. In the present embodiment, an optical sensing device (not shown), such as a camera, may be disposed at a position corresponding to the photosensitive region 106, and the optical sensing device is disposed below the first substrate 101 and the second substrate 102. The spacing area 107 is disposed around the photo-sensing area 106 such that the spacing area 107 is located between the display area AA and the photo-sensing area 106. For example, the photosensitive region 106 may be disposed within the display area AA, such that the periphery of the photosensitive region 106 is the display area AA. In addition, the spacing region 107 is disposed between the photosensitive region 106 and the display area AA, such that the spacing region 107 can serve as a transition region between the photosensitive region 106 and the display area AA.

Specifically, as shown in fig. 1B, the spacing region 107 is divided into a first spacing region 1071, a second spacing region 1072, and a third spacing region 1073. From the photo-sensing region 106, a second spacing region 1072, a third spacing region 1073 and a first spacing region 1071 are arranged in that order outward, i.e. the second spacing region 1072 surrounds the photo-sensing region 106, the third spacing region 1073 surrounds the second spacing region 1072 and the first spacing region 1071 surrounds the third spacing region 1073. The first spacing region 1071 may be provided separately in the spacing region 107, the first spacing region 1071 and the second spacing region 1072 may be provided, or the first spacing region 1071, the second spacing region 1072, and the third spacing region 1073 may be provided.

As shown in fig. 1B, in the first spacing region 1071, the light-shielding layer 103 and the second flat layer OC2 extend from the display area AA into the first spacing region 1071, and the second flat layer OC2 in the display area AA has a first horizontal height H1. In addition, a first spacer PS1 is further disposed in the first spacing region 1071, and a first spacer PS1 is disposed on the light-shielding layer 103 and surrounds the photosensitive region 106. Specifically, the first spacer PS1 is composed of a first spacer BP1 and a first spacer pillar BS1, the first spacer BP1 is composed of a first color resist layer 1041, a second color resist layer 1042 and a third color resist layer 1043 which are stacked, and the second planarization layer OC2 covers the first spacer BP 1. In the present embodiment, the second planarization layer OC2 has a second level H2 in the first spacing region 1071, and the first spacer pillars BS1 are disposed on the second planarization layer OC 2. In the first spacing region 1071, the second horizontal height H2 is greater than the first horizontal height H1 due to the first spacing pad BP1 formed by the stacked color resists being disposed under the second flat layer OC2, so that the second flat layer OC2 forms a height difference in different regions, and the display molecule layer 105 in the display region AA can be effectively prevented from flowing into the first spacing region 1071. In addition, in the first spacing area 1071, the first planarization layer OC1 extends from the display area AA into the first spacing area 1071. The first planarization layer OC1 has an eighth level H8 in the first spacer region 1071, and the eighth level H8 is greater than the third level, and similarly, the first planarization layer OC1 forms a height difference in different regions, thereby more effectively preventing the display molecule layer 105 in the display region AA from flowing into the first spacer region 1071. It should be noted that the sum of the second level H2 and the eighth level H8 is smaller than the distance between the first substrate 101 and the second substrate 102.

As shown in fig. 1B, a first opening S1 is further disposed in the first planar layer OC1 in the first spacing region 1071, the first spacing pillar BS1 corresponds to the position of the first opening S1, and the first spacing pillar BS1 extends upward to the first opening S1, so that the first spacing pillar BS1 is at least partially received in the first opening S1. Thereby, a nearly closed fitting structure is formed between the first planarization layer OC1 and the first spacer BS1, so that the display molecule layer 105 of the display area AA is difficult to flow into the first spacer region 1071. In the present embodiment, the number of the first spacers BS1 or the first openings S1 is two examples, and one or more spacers may be provided, which is not limited in the present invention. Thus, the first spacer region 1071 may block the photosensitive region 106 and the display region AA such that the display molecular layer 105 is only disposed in the display region AA, and the display molecular layer is not disposed in the photosensitive region 106, thereby improving the transmittance of the photosensitive region 106.

As shown in fig. 1B, in the second isolation region 1072, the first and second planarization layers OC1 and OC2 and the light-shielding layer 103 extend from the display region AA to the second isolation region 1072. A second spacer PS2 is further disposed in the second spacer region 1072, and a second spacer PS2 is disposed on the second substrate 102 and surrounds the photo-sensing region 106. Specifically, the second spacer PS2 is composed of a second spacer BP2 and a second spacer BS2, and the second spacer BP2 is composed of a first color resist layer 1041 and a second color resist layer 1042 which are stacked, or composed of two layers of the first color resist layer 1041, the second color resist layer 1042 and a third color resist layer 1043 which are stacked. The second planarization layer OC2 covers the second spacer BP2 and has a fifth horizontal height H5, and the second spacer pillars BS2 are disposed on the second planarization layer OC 2. In the second spaced area 1072, the first planarization layer OC1 has a fourth horizontal height H4, and a second opening S2 is disposed in the first planarization layer OC1, the second spacer pillar BS2 corresponds to the position of the second opening S2, and the first spacer pillar BS2 extends upward to the second opening S2, such that the second spacer pillar BS2 is at least partially received in the second opening S2. In the present embodiment, the fourth level H4 is greater than or equal to the third level H3, and the fifth level H5 is greater than the first level H1.

In addition, in the embodiment, the number of the second spacer pillars BS2 or the second openings S2 is two examples, and one or more second spacer pillars may be provided, which is not limited in the invention. It should be noted that the first opening S1 and the second opening S2 may be openings of the same structure, or may be openings of different structures as shown in fig. 1B, that is, the first opening S1 is an opening of a groove structure, and the second opening S2 is an opening of an approximately horn shape, which is not limited in the invention. Thus, the second spacing region 1072 and the first spacing region 1071 together further block the photosensitive region 106 and the display region AA, so that the display molecular layer 105 is only disposed in the display region AA, and the display molecular layer is not disposed in the photosensitive region 106, thereby improving the transmittance of the photosensitive region 106.

As further shown in fig. 1B, in the third interval area 1073, the first and second planarization layers OC1 and OC2 and the light-shielding layer 103 extend from the display area AA to the third interval area 1073. In the third spacing region 1073, the first planarization layer has a sixth level H6, and the second planarization layer OC2 has a seventh level H7 (not shown). When the display molecule layer 105 overflows from the display area AA into the first spacer region 1071, the third spacer region 1073 may provide a buffer space in order to prevent the display molecule layer 105 from further penetrating into the photo-sensing region 106, and in this case, the space of the third spacer region 1073 needs to be increased. In the present embodiment, in order to increase the space of the third spacing region 1073 as much as possible, the sixth level H6 is between 0 and the third level H3, and the seventh level H7 is between 0 and the first level H1.

In summary, according to the embodiments of the present invention, the first substrate and the second substrate are combined and simultaneously vacuumized, and the spacer is disposed in the spacer area, and the opening is disposed in the planarization layer in the spacer area, and the spacer and the opening cooperate with each other to isolate the photo-sensing area, so that the photo-sensing area forms a closed space, and no display molecule layer is disposed in the photo-sensing area, thereby improving the transmittance of the photo-sensing area and satisfying the requirement of the highly-configured camera for capturing light.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A display device, comprising:

the first substrate is provided with a display area and a peripheral area which are adjacent to each other, and a first flat layer covers the display area and the peripheral area;

a second substrate having a light-shielding layer, a color-resisting layer and a second flat layer, wherein the color-resisting layer has a first color-resisting layer, a second color-resisting layer and a third color-resisting layer, the second flat layer covers the light-shielding layer and the color-resisting layer, the light-shielding layer has a plurality of openings in the display area, and the first color-resisting layer, the second color-resisting layer and the third color-resisting layer are respectively accommodated in the plurality of openings;

the display molecular layer is arranged between the first substrate and the second substrate, and the position of the display molecular layer corresponds to the display area;

a light sensing area disposed on the first substrate and the second substrate, wherein the light sensing area is located in the display area;

a spacing region surrounding the photosensitive region, the spacing region having a first spacing region, the second flat layer extending from the display region and disposed in the first spacing region,

the second flat layer has a first level in the display area, and a second level in the first spacing area, wherein the second level is greater than the first level.

2. The display device according to claim 1, wherein a first spacer is disposed in the first spacer region, and the first spacer is disposed on the second substrate and surrounds the photo sensing region.

3. The display device according to claim 1, wherein the spacer region has a second spacer region, the first spacer region is disposed around the second spacer region, and the second spacer region is disposed with a second spacer, the second spacer is disposed around the photo sensing region.

4. The display device as claimed in claim 3, wherein the spacing region has a third spacing region disposed between the first spacing region and the second spacing region.

5. The display device according to claim 2, wherein the first planarization layer extends from the display region to be disposed in the first spacing region, a first opening is formed in the first planarization layer in the first spacing region, the first spacer has a first spacer and a first spacer pillar, the first opening corresponds to a position of the first spacer pillar, and the first spacer pillar is received in the first opening.

6. The display device of claim 5, wherein the first spacer has the first color-resist layer, the second color-resist layer, and the third color-resist layer disposed in a stack.

7. The display device according to claim 6, wherein the light-shielding layer is disposed in the display region and the spacing region, and the first spacer is disposed on the light-shielding layer.

8. The display device according to claim 3, wherein the first flat layer extends from the display region to the second spacing region, the second spacer has a second spacer and a second spacer pillar, the first flat layer in the second spacing region has a second opening, the second opening corresponds to the second spacer pillar, and the second spacer pillar is received in the second opening.

9. The display device according to claim 8, wherein the first planarization layer has a third level in the display area, and the first planarization layer has a fourth level in the second spacer area, and the fourth level is greater than or equal to the third level.

10. The display device according to claim 8, wherein the second spacer has the first color resist layer or the second color resist layer stacked, and wherein the light shielding layer is provided on the display region and the spacer region, and the second spacer is provided on the light shielding layer.

11. The display device as claimed in claim 10, wherein the second flat layer extends from the display region to the second spacing region, and the second flat layer in the second spacing region covers the second spacer and has a fifth horizontal height, and the fifth horizontal height is greater than the first horizontal height.

12. The display device according to claim 4, wherein the first planarization layer extends from the display area to the third spacing area, and the first planarization layer in the third spacing area has a sixth level between 0 and the third level.

13. The display device as claimed in claim 4, wherein the second planarization layer extends from the display region to the third spacing region, and the second planarization layer in the third spacing region has a seventh level between 0 and the first level.

14. The display device as claimed in claim 9, wherein the first planarization layer extends from the display region to the first spacing region, and the first planarization layer has an eighth level in the first spacing region, and the eighth level is greater than the third level.

15. The display device of claim 1, further comprising:

and the optical sensing device is arranged below the second substrate, and the position of the optical sensing device corresponds to the position of the light sensing area.