CN218350858U - Touch display screen and display device - Google Patents

Abstract

The utility model relates to a show technical field, especially relate to a touch-control display screen and display device. The touch display screen includes: the driving back plate, the pixel units, the first shading insulating layer and the touch electrode layer are arranged on the driving back plate; the pixel unit array is arranged on the driving backboard, and the pixel unit comprises at least one sub-pixel; the first shading insulating layer is arranged on the driving back plate, hollow holes corresponding to the sub-pixels one by one are formed in the first shading insulating layer, and the sub-pixels are located in the hollow holes; the touch electrode layer is arranged on the first shading insulating layer and is electrically connected with the driving back plate. The utility model discloses a touch-control display screen and display device has realized that the touch-control electrode layer can change electric capacity and in order accurate pursuit touching point when receiving the touching, improves the user and uses experience.

Description

Touch display screen and display device

Technical Field

The utility model relates to a show technical field, especially relate to a touch-control display screen and display device.

Background

Micro-LEDs (Micro-LEDs) have the advantages of high brightness, wide dynamic range, long service life, stability, reliability, etc., and thus can be widely used in display devices.

With the rapid development of display technologies, various display technologies are developed, especially in the field of screen displays such as mobile phones and tablet computers, and besides requiring a higher resolution of the display device, the touch display screen also requires a touch function, which has become a mainstream mode.

However, when the user touches the corresponding position of the touch display screen, the touch display screen may not accurately find the touch point, which reduces the user experience.

Therefore, how to improve the user experience is an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing deficiencies of the prior art, an object of the present application is to provide a touch display screen and a display device, which aim to solve the problem of how to improve the user experience of the touch display screen.

A touch display screen, comprising:

driving the back plate;

the pixel units are arranged on the driving backboard in an array mode and comprise at least one sub-pixel;

the first shading insulating layer is arranged on the driving back plate, hollow holes corresponding to the sub-pixels one by one are formed in the first shading insulating layer, and the sub-pixels are located in the hollow holes;

and the touch electrode layer is arranged on the first shading insulating layer and is electrically connected with the driving backboard.

In the touch display screen, the touch electrode layer is arranged on the first shading insulating layer and is electrically connected with the driving back plate, so that a capacitor can be formed, and when the touch electrode layer is touched, the capacitor can be changed so as to accurately track a touch point. Based on this, each sub-pixel in the pixel unit is located the fretwork respectively and downthehole, and each sub-pixel separates through first shading insulating layer, avoids each sub-pixel colour mixture to appear, improves user's use and experiences.

Optionally, the touch electrode layer includes: a first electrode layer, a first insulating layer, and a second electrode layer which are stacked;

the first electrode layer is arranged on the first shading insulating layer, and the first electrode layer and the second electrode layer are respectively electrically connected with the driving backboard.

In the touch display screen, the first electrode layer and the second electrode layer are respectively connected with the driving back plate, when the touch display screen displays, the first electrode layer and the second electrode layer are both provided with voltage, the first insulating layer is arranged between the first electrode layer and the second electrode layer, a capacitor is formed by the first insulating layer, the capacitor is changed by touch, the touch point is tracked by the capacitor, and the touch function is realized.

Optionally, the driving back plate includes: a substrate, a third electrode layer, a second insulating layer, and a fourth electrode layer which are stacked;

the first light-shielding insulating layer and the pixel unit are disposed on the fourth electrode layer, and the third electrode layer and the fourth electrode layer are electrically connected to the first electrode layer and the second electrode layer, respectively.

In the touch display screen, when the back plate is driven to drive the sub-pixels to display, the power can be supplied to the touch electrode layer.

Optionally, a via hole is formed in the touch display screen, and a second shading insulating layer for blocking external water vapor is arranged in the via hole;

the via hole penetrates through the first shading insulating layer and the touch electrode layer; or the via hole penetrates through the driving backboard, the first shading insulating layer and the touch electrode layer.

In the touch display screen, the via holes are formed so as to facilitate wiring or connection of components located on different layers, the second shading insulating layer separates the via holes from regions where the pixel units are located, external water vapor can be prevented from entering the touch display screen through the via holes, and light in the touch display screen can be prevented from penetrating to cause bright lines at the positions of the via holes.

Optionally, the second light-shielding insulating layer is annularly disposed in the via hole, and the second electrode layer is located above the second light-shielding insulating layer and covers the second light-shielding insulating layer; the first electrode layer and the third electrode layer are connected through a first conductive part; the second electrode layer and the fourth electrode layer are connected through a second conductive part; one end of the second conductive part is connected with the second electrode layer, and the other end of the second conductive part is connected with the fourth electrode layer along the second shading insulating layer.

In the touch display screen, the first electrode layer and the second electrode layer are respectively in conductive connection with the third electrode layer and the fourth electrode layer through the first conductive part and the second conductive part, so that the driving back plate can provide stable voltage for the first electrode layer and the second electrode layer; the second conductive part is arranged in the through hole, so that production and processing are facilitated.

Optionally, the first light-shielding insulating layer and the second light-shielding insulating layer are black resin or black glue.

Optionally, the touch display screen further includes a protective layer covering the touch electrode layer.

Optionally, the via hole penetrates through the protective layer.

Optionally, a light emitting hole penetrating through the touch electrode layer and corresponding to the sub-pixel is disposed on the touch electrode layer.

In the touch display screen, the light outlet hole for avoiding the light emission of the sub-pixel is formed in the touch electrode layer, so that the interference on the light emission signal of the sub-pixel is reduced, and the tracking of a touch point is more accurate.

Based on the same concept, the application further provides a display device, which comprises the touch display screen in some embodiments. The technical effects that can be achieved by the touch display screen in some of the aforementioned embodiments can also be achieved by the display device, and are not described in detail herein.

Drawings

Fig. 1 is a cross-sectional view of a touch display screen according to an embodiment;

FIG. 2 is a top view of the touch electrode layer in FIG. 1;

fig. 3 is a cross-sectional view of a touch display screen according to another embodiment;

fig. 4 is a cross-sectional view of a touch display screen according to another embodiment;

fig. 5 is a schematic production flow diagram of a touch display screen according to an embodiment.

Description of reference numerals:

100-driving a back plate; 101-a substrate; 102-a third electrode layer; 103-a second insulating layer; 104-a fourth electrode layer; 200-a first light-shielding insulating layer; 201-hollow holes; 301-sub-pixel; 400-a touch electrode layer; 401 — a first electrode layer; 402-a first insulating layer; 403-a second electrode layer; 404-light outlet; 500-a second light-shielding insulating layer; 601-a first conductive portion; 602-a second conductive portion; 700-a bonding layer; 800-a protective layer; 900-via hole.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The Micro-LED has the advantages of high brightness, wide dynamic range, long service life, stability, reliability and the like, and can be widely applied to display devices.

With the rapid development of display technologies, various display technologies are in endless, and especially in the field of screen displays such as mobile phones and tablet computers, a display device is required to have a higher resolution and a touch function, so that a touch display screen has become a mainstream mode.

However, when the user touches the corresponding position of the touch display screen, the touch display screen may not accurately find the touch point, which reduces the user experience.

Based on this, the present application intends to provide a solution to the above technical problem, the details of which will be explained in the following embodiments.

Referring to fig. 1 and fig. 2, an embodiment of the present application provides a touch display screen, including: the display device comprises a driving backboard 100, a plurality of pixel units, a first shading insulating layer 200 and a touch electrode layer 400, wherein the pixel units are arranged in an array on the driving backboard.

The pixel unit includes at least one sub-pixel 301.

It will be appreciated that the sub-pixels 301 are for emitting light signals for conventional display, and that the sub-pixels 301 typically comprise light emitting devices. In some embodiments, the light emitting device may be an LED chip, such as a micro LED chip or a mini LED chip. In addition, the number and color of the sub-pixels 301 may be set as desired, for example, the pixel unit includes at least one red sub-pixel (R), green sub-pixel (G), and blue sub-pixel (B).

The first light-shielding insulating layer 200 is disposed on the driving backplane 100, and the first light-shielding insulating layer 200 is provided with hollow holes 201 corresponding to the sub-pixels 301 one to one, and the sub-pixels 301 are located in the hollow holes 201. In some embodiments, the structure of the first light-shielding insulating layer 200 may be set according to actual requirements, for example, the first light-shielding insulating layer 200 may adopt a mesh structure. The sub-pixel 301 is located in the hollow hole 201, and the size of the hollow hole for Rong Nazi pixel 301 on the first light-shielding insulating layer 200 is matched with the size of the sub-pixel located in the hollow hole. The height of the top of the sub-pixel 301 may be equal to the height of the top of the first light-shielding insulating layer 200, but is not limited to be equal, as long as the height difference between the sub-pixel 301 and the first light-shielding insulating layer 200 is small so as to avoid color mixing between the sub-pixels.

The touch electrode layer 400 is disposed on the first light-shielding insulating layer 200, and the touch electrode layer 400 is electrically connected to the driving back plate 100.

Referring to fig. 4, in an embodiment, the touch electrode layer 400 may be made of a transparent material, that is, the first electrode layer, the first insulating layer and the second electrode layer are made of a transparent material. The touch electrode layer 400 may be transparent; or the touch electrode layer 400 is transparent at the portion corresponding to the sub-pixel, so long as the touch electrode layer does not affect the light emitting signal of the sub-pixel.

Referring to fig. 1 and fig. 3, in some embodiments, a light exit hole 404 penetrating through the touch electrode layer 400 and corresponding to the sub-pixel 301 is disposed on the touch electrode layer 400, and the light exit hole 404 is disposed corresponding to the sub-pixel 301 so as to avoid the sub-pixel 301 and avoid affecting the light signal emitted by the sub-pixel 301, and the touch point tracking is more accurate; in addition, through setting up the light-emitting hole, the touch-control electrode layer can adopt transparent material to make, also can adopt non-transparent material to make, has reduced the restriction to touch-control electrode layer material.

Referring to fig. 1, in some embodiments, the touch electrode layer 400 includes: a first electrode layer 401, a first insulating layer 402, and a second electrode layer 403 are stacked. The first electrode layer 401 is disposed on the first light-shielding insulating layer 200, that is, the driving back plate 100, the first electrode layer 401, the first insulating layer 402, and the second electrode layer 403 are sequentially stacked, and the first electrode layer 401 and the second electrode layer 403 are electrically connected to the driving back plate 100, respectively.

It can be understood that the driving back plate 100 can supply power to the touch electrode layer 400, when displaying, the first electrode layer 401 and the second electrode layer 403 both have voltage, and the first electrode layer 401 and the second electrode layer 403 are separated by the first insulating layer 402, so as to form a capacitance, and the capacitance can be changed by touching, and thus the touch point can be tracked. In some embodiments, the first electrode layer 401 and the second electrode layer 403 may be made of a conductive metal material, such as indium tin oxide metal. The first insulating layer 402 may be made of an insulating material, such as silicon oxide or silicon nitride.

Referring to fig. 1, in some embodiments, the driving back plate 100 includes: a substrate 101, a third electrode layer 102, a second insulating layer 103, and a fourth electrode layer 104 are stacked. Here, the first light-shielding insulating layer 200 and the pixel unit are provided over the fourth electrode layer 104, and the third electrode layer 102 and the fourth electrode layer 104 are electrically connected to the first electrode layer 401 and the second electrode layer 403, respectively.

It will be appreciated that the driving backplane 100 may be used to drive the subpixel emitting optical signals for conventional display. In some embodiments, the substrate 101 may be a glass backplane. The third electrode layer 102 and the fourth electrode layer 104 may be made of a conductive metal material, such as indium tin oxide (ito) metal. The second insulating layer 103 may be made of an insulating material, and may be silicon oxide or silicon nitride, for example.

Referring to fig. 1, in some embodiments, the pixel unit and the driving backplane 100 may be connected by a bonding layer 700. Specifically, the bonding layer 700 may be disposed on the fourth electrode layer 104, and the sub-pixels may be transferred to the bonding layer for fixing by a bulk transfer method.

Referring to fig. 1, in some embodiments, a via hole 900 is formed on the touch display screen, and a second light-shielding insulating layer 500 for blocking external water vapor is disposed in the via hole 900.

Referring to fig. 1 and 5, in some embodiments, the via 900 may penetrate through a portion of the touch display screen. Specifically, the via hole 900 may penetrate through the first light-shielding insulating layer 200 and the touch electrode layer 400 but not through the driving backplane, and a through hole corresponding to the via hole on the driving backplane may be processed or not according to a requirement. When the via hole is arranged, the position of the via hole to be arranged can be vacated, for example, the position of the via hole can be vacated in a mask (also called mask) shielding mode.

Referring to fig. 1, in an embodiment, the via 900 may penetrate all of the touch display screen. Specifically, the via hole may penetrate through the driving backplane 100, the first light-shielding insulating layer 200, and the touch electrode layer 400.

Referring to fig. 1, in an embodiment, the second light-shielding insulating layer 500 is disposed around the via hole 900, the second light-shielding insulating layer 500 and the first light-shielding insulating layer 200 are located on the same side of the driving backplane 100, the second electrode layer 403 is located above the second light-shielding insulating layer 500, and the second electrode layer 403 covers the second light-shielding insulating layer 500.

It is understood that the first light-shielding insulating layer 200 is disposed around the sub-pixels to separate the adjacent sub-pixels 301, which can prevent color mixing; the second shading insulating layer 500 separates the via hole 900 from the sub-pixel 301, and can avoid the mixing of light and water vapor, that is, the second shading insulating layer 500 can block the light of the sub-pixel 301, so as to avoid the light signal emitted from the sub-pixel 301 from being transmitted to the via hole 900 and appearing a bright line, and the second shading insulating layer 500 can also effectively block the external water vapor from entering the touch display screen through the via hole 900, thereby avoiding the occurrence of reliability abnormality. In some embodiments, the first light-shielding insulating layer 200 and the second light-shielding insulating layer 500 may employ a light-shielding insulating material; for example, the first light-shielding insulating layer 200 may be a light-shielding insulating material such as black resin or black paste, and the second light-shielding insulating layer 500 may be a light-shielding insulating material such as black resin or black paste.

Referring to fig. 1, in some embodiments, the first light-shielding insulating layer 200 and the second light-shielding insulating layer 500 may have different heights. In the present embodiment, the height of the second light-shielding insulating layer 500 is higher than that of the first light-shielding insulating layer 200, so that the second light-shielding insulating layer 500 can sufficiently block light and moisture.

Referring to fig. 1, in some embodiments, the patterned first light-shielding insulating layer 200 and the patterned second light-shielding insulating layer 500 may be formed over the fourth electrode layer 104 by exposure and development, for example, a halftone (halftoning) process may be used for the exposure and development.

Referring to fig. 1, in some embodiments, the touch display panel further includes a protection layer 800 covering the touch electrode layer 400. The protection layer 800 is stacked on the second electrode layer 403, and the protection layer 800 covers the touch electrode layer 400 to perform a sealing protection function, so as to prevent foreign substances from entering the touch display screen. The protective layer 800 may be a transparent protective film, and for example, glass or PET resin (PET resin is abbreviated as polyethylene terephthalate resin) may be used.

Referring to fig. 1, in some embodiments, the via may penetrate the protection layer 800. In some embodiments, an image capturing unit, such as a camera, a CMOS or CCD or other type of image capturing unit, may be disposed in the via hole, which is not limited herein.

Referring to fig. 1, in some embodiments, the first electrode layer 401 is connected to the third electrode layer 102 through a first conductive portion 601; the second electrode layer 403 and the fourth electrode layer 104 are connected to each other through a second conductive portion 602.

It is understood that the first electrode layer 401 and the second electrode layer 403 are electrically connected to the third electrode layer 102 and the fourth electrode layer 104 through the first conductive part 601 and the second conductive part 602, respectively, so that the third electrode layer 102 and the fourth electrode layer 104 can supply power to the touch electrode layer 400. The first conductive portion 601 and the second conductive portion 602 may be made of a conductive material, for example, the first conductive portion 601 may be silver paste, and the second conductive portion 602 may be formed by sputtering a conductive metal.

Referring to fig. 1, in some embodiments, the second conductive portion 602 is located in the via 900, one end of the second conductive portion 602 is connected to the second electrode layer 403, and the other end is connected to the fourth electrode layer 104 along the second light-shielding insulating layer 500. Specifically, the second conductive portion 602 may be annularly disposed in the via hole 900 by sputtering, a sidewall of the second conductive portion 602 facing away from the via hole abuts against a sidewall of the second light-shielding insulating layer 500 facing the via hole, and two ends of the second conductive portion 602 are respectively connected to the second electrode layer 403 and the fourth electrode layer 104.

Referring to fig. 1 and 3, in some embodiments, the sub-pixels near the via 900 may be in direct contact with the second light-shielding insulating layer 500, or may be separated from the second light-shielding insulating layer by the first light-shielding insulating layer 200. Whether the first light-shielding insulating layer 200 is disposed between the sub-pixel adjacent to the via 900 and the second light-shielding insulating layer 500 may be rotated according to specific requirements.

The following describes a manufacturing process of the touch display screen according to an embodiment.

Referring to fig. 3 and 4, the manufacturing steps of the touch display panel include:

s1, forming a third electrode layer on a substrate; the substrate may be made of glass, and the third electrode layer may be provided on the substrate by sputtering.

S2, forming a second insulating layer above the third electrode layer; the second insulating layer may be provided on the third electrode layer by a sputtering film formation method.

S3, forming a fourth electrode layer above the second insulating layer; the fourth electrode layer may be provided on the second insulating layer by a sputtering film formation method.

S4, forming a bonding layer above the fourth electrode layer; the bonding layer transfers the current driving the back plate to the sub-pixels.

S5, forming a first shading insulating layer and a second shading insulating layer above the fourth electrode layer; the first light-shielding insulating layer and the second light-shielding insulating layer may be provided over the fourth electrode layer by a sputtering film formation method. The size of the hollow hole in the first shading insulating layer is matched with that of the sub-pixel, and the second shading insulating layer is located at the edge of the through hole to play a role in isolating water vapor and light.

S6, forming a second conductive part on the outer edge of the second shading insulating layer; the second conductive part may have a thickness of 200A, that is, 20 nm, and may be provided on a side wall of the second light shielding insulating layer facing the via hole side by sputtering.

S7, arranging a first electrode layer above the first shading insulating layer; the thickness of the first electrode layer may be 400A, that is, 40 nm, and the first electrode layer may be provided on the first light-shielding insulating layer by a sputtering film formation manner.

S8, arranging a first insulating layer above the first electrode layer; the thickness of the first insulating layer may be 3500A, i.e., 350 nm, and the first insulating layer may be provided on the first electrode layer by sputtering film formation.

S9, arranging a second electrode layer on the first insulating layer; the second electrode layer may have a thickness of 400A, i.e., 40 nm, and may be disposed on the first insulating layer by sputtering, and connect the second electrode layer to the second conductive portion at a position close to the via hole.

S10, transferring the sub-pixels to a fourth electrode layer of the driving back plate; the sub-pixels may be transferred to the bonding layer over the fourth electrode layer by bulk transfer.

S11, attaching a protective layer, and arranging a first conductive part to connect the first electrode layer with the third electrode layer; the protective layer may be a transparent protective film made of PET resin, the first conductive portion may be silver paste, and the first electrode layer is connected to the third electrode layer by a dispensing method.

S12, punching a hole; can use laser cutting to punch, when punching, aim at the via hole position of vacating for the via hole runs through protective layer, fourth electrode layer, second insulating layer and third electrode layer.

An embodiment of the present application further provides a display device, including the touch display screen in any of the foregoing embodiments. The technical effects that can be achieved by the touch display screen in some of the aforementioned embodiments can also be achieved by the display device, and are not described in detail herein.

It should be understood that the application of the present invention is not limited to the above examples, and that modifications or changes can be made by those skilled in the art based on the above description, and all such modifications and changes are intended to fall within the scope of the appended claims.

Claims (10)

1. A touch display screen, comprising:

driving the back plate;

the pixel units are arranged on the driving backboard in an array mode and comprise at least one sub-pixel;

the first shading insulating layer is arranged on the driving back plate, hollow holes corresponding to the sub-pixels one by one are formed in the first shading insulating layer, and the sub-pixels are located in the hollow holes;

and the touch electrode layer is arranged on the first shading insulating layer and is electrically connected with the driving back plate.

2. The touch display screen of claim 1, wherein the touch electrode layer comprises: a first electrode layer, a first insulating layer, and a second electrode layer which are stacked;

the first electrode layer is disposed on the first light-shielding insulating layer, and the first electrode layer and the second electrode layer are electrically connected to the driving backplane respectively.

3. The touch display screen of claim 2, wherein the driving backplane comprises: a substrate, a third electrode layer, a second insulating layer, and a fourth electrode layer which are stacked;

the first light-shielding insulating layer and the pixel unit are disposed on the fourth electrode layer, and the third electrode layer and the fourth electrode layer are electrically connected to the first electrode layer and the second electrode layer, respectively.

4. The touch display screen of claim 3, wherein a via hole is formed in the touch display screen, and a second light-shielding insulating layer for blocking outside water vapor is arranged in the via hole;

the via hole penetrates through the first shading insulating layer and the touch electrode layer; or the via hole penetrates through the driving backboard, the first shading insulating layer and the touch electrode layer.

5. The touch display screen of claim 4, wherein the second light-shielding insulating layer is disposed around the via hole, and the second electrode layer is disposed above the second light-shielding insulating layer and covers the second light-shielding insulating layer; the first electrode layer and the third electrode layer are connected through a first conductive part; the second electrode layer and the fourth electrode layer are connected through a second conductive part; one end of the second conductive part is connected with the second electrode layer, and the other end of the second conductive part is connected with the fourth electrode layer along the second shading insulating layer.

6. The touch display screen of claim 4, wherein the first light-shielding insulating layer and the second light-shielding insulating layer are black resin or black glue.

7. The touch display screen of any one of claims 4 to 6, further comprising a protective layer overlying the touch electrode layer.

8. The touch display screen of claim 7, wherein the via hole extends through the protective layer.

9. The touch display screen of claim 1, 2, 3, 4, 5, 6, or 8, wherein the touch electrode layer is provided with light holes penetrating through the touch electrode layer and corresponding to the sub-pixels.

10. A display device comprising the touch display screen according to any one of claims 1 to 9.

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