CN217112955U

CN217112955U - Curved surface screen

Info

Publication number: CN217112955U
Application number: CN202220392817.8U
Authority: CN
Inventors: 廖亿彬; 万志强
Original assignee: Truly Semiconductors Ltd
Current assignee: Truly Semiconductors Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-08-02
Anticipated expiration: 2032-02-25

Abstract

The utility model discloses a curved surface screen, include: an upper substrate on which a VCOM layer is provided, the upper substrate being a rigid base material; the display area of the lower substrate is sequentially provided with a TFT layer and a CF layer, the lower substrate is a flexible base material, and the lower substrate and the upper substrate are bent towards one side of the lower substrate; a liquid crystal sandwiched between the lower substrate and the upper substrate. The utility model discloses in, the backup pad of infrabasal plate can be regarded as to the upper substrate, supports the infrabasal plate by the upper substrate for the risk that the infrabasal plate warp can reduce greatly, and CF layer and TFT layer preparation simultaneously are on the infrabasal plate in addition, and the pixel that can reduce the curved surface greatly screen has the problem of dislocation, improves the display effect of curved surface screen, improves user experience.

Description

Curved surface screen

Technical Field

The utility model relates to a show technical field, especially relate to a curved surface screen.

Background

Curved display devices, i.e. display devices whose screen is not flat, have a certain curvature. In recent years, curved display devices have been developed more and more rapidly, and are applied to large-size display devices such as smart televisions and cinema screens, or small-size display devices such as smart phones. Curved display devices can provide better viewing and can be made larger in size with the same width as flat display devices.

At present, flexible substrates such as plastic or metal sheets are generally used as substrates of curved panels in curved display devices. In other words, in the curved panel, the upper substrate and the lower substrate disposed on both sides of the liquid crystal are made of a flexible base material such as plastic or metal foil. However, in the curved panel using the flexible substrate, the flexible substrate is easily deformed, and the curved panel is likely to have a problem of pixel misalignment after bending, that is, a problem of misalignment between color pixel dots and TFTs constituting the CF layer.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a curved surface screen for among the solution prior art, curved surface screen exists the problem of crooked back pixel dislocation easily.

In order to solve the above problem, the utility model adopts the following technical scheme:

providing a curved screen comprising:

the upper substrate is provided with a VCOM layer and is a rigid base material;

the display panel comprises a lower substrate, a TFT layer and a CF layer are sequentially arranged in a display area of the lower substrate, the lower substrate is a flexible base material, and the lower substrate and the upper substrate are bent towards one side of the lower substrate;

a liquid crystal sandwiched between the lower substrate and the upper substrate.

Optionally, the lower substrate is a plastic substrate.

Optionally, the upper substrate is a tempered glass substrate.

Optionally, the lower substrate is attached to the pre-bent upper substrate.

Optionally, the thickness of the upper substrate is smaller than that of the lower substrate.

Optionally, the lower substrate is further provided with a lower alignment film and a lower PS stacked outside the CF layer, and the upper substrate is provided with an upper alignment film and an upper PS stacked outside the VCOM layer.

Optionally, the lower alignment film and the upper alignment film are both PI films.

Optionally, three of the sides of the lower substrate are flush with the corresponding sides of the upper substrate, the other side of the lower substrate protrudes from the upper substrate, and a driving IC is disposed on one side of the lower substrate protruding from the upper substrate.

Optionally, the bending degree of the portion of the lower substrate protruding from the upper substrate is less than the bending degree of the other portion of the lower substrate.

The utility model discloses a technical scheme can reach following beneficial effect:

the upper substrate may serve as a support plate for the lower substrate, which is supported by the upper substrate. The upper substrate is a rigid substrate, and compared with the flexible substrate, the rigid substrate has small deformation risk, so that the deformation risk of the lower substrate is greatly reduced. And the lower substrate has a lower risk of deformation than the upper substrate with respect to the upper substrate. And the CF layer and the TFT layer are simultaneously manufactured on the lower substrate. Therefore, the problem that pixels of the curved screen are staggered can be greatly reduced, the display effect of the curved screen is improved, and the user experience is improved.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below to form a part of the present invention, and the exemplary embodiments and the description thereof of the present invention explain the present invention and do not form an improper limitation to the present invention. In the drawings:

fig. 1 is a schematic structural diagram of a curved screen disclosed in an embodiment of the present invention;

fig. 2 is a schematic diagram of a film structure of a curved screen in an assumed unfolded state according to an embodiment of the present invention;

fig. 3 is a manufacturing flow chart of the curved screen disclosed in the embodiment of the present invention.

Wherein the following reference numerals are specifically included in figures 1-3:

an upper substrate-1; a lower substrate-2; frame glue-3; VCOM layer-11; upper PS-12; TFT layer-21; CF layer-22; and a driver IC-23.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and 2, the curved panel of the present invention includes an upper substrate 1, a lower substrate 2 and liquid crystal. The upper substrate 1 and the lower substrate 2 are arranged at intervals up and down, and the liquid crystal is sandwiched between the upper substrate 1 and the lower substrate 2.

The upper substrate 1 is provided with a VCOM layer 11 on the side facing the liquid crystal. VCOM, the common voltage, and the pixel voltage cooperate to develop the TFT-driven liquid crystal.

The lower substrate 2 is provided with a TFT layer 21 and a CF layer 22 in this order on the side facing the liquid crystal. A TFT, i.e., Thin Film Transistor, is an abbreviation of a Thin Film Transistor, and is used for driving liquid crystal. CF, Color filter, is an abbreviation of Color filter, and mainly includes a Black Matrix (BM), a Color Layer (including three colors of R (red), green (G), and blue (B)), a protective Layer (Over Coat, O/C), and the like. The main function of the CF layer 22 is to block light and provide color. At this time, the light passing through the lower substrate 2 forms color light, and the color light is sequentially displayed through the liquid crystal and the upper substrate 1.

Also, the hardness of the upper substrate 1 is greater than that of the lower substrate 2, and the upper substrate 1 may be a rigid base material and the lower substrate 2 may be a flexible base material. The upper and

lower substrates

1 and 2 are bent toward the lower substrate 2 side, that is, the middle portions of the upper and

lower substrates

1 and 2 are protruded toward the upper substrate 1 side, and both ends of the upper and

lower substrates

1 and 2 are protruded toward the lower substrate 2 side.

After the curved screen is manufactured, the upper substrate 1 can be used as a support plate for the lower substrate 2, and the lower substrate 2 is supported by the upper substrate 1. The upper substrate 1 is a rigid substrate, and compared with a flexible substrate, the rigid substrate has a small risk of deformation, so that the risk of deformation of the lower substrate 2 is greatly reduced. And the risk of deformation of the lower substrate 2 is less than the risk of deformation of the upper substrate 1 with respect to the upper substrate 1. And the CF layer 22 is formed on the lower substrate 2 simultaneously with the TFT layer 21. Therefore, the problem that pixels of the curved screen are staggered can be greatly reduced, the display effect of the curved screen is improved, and the user experience is improved.

The material of the upper substrate 1 and the lower substrate 2 may be specifically set according to the requirement. In one example, the upper substrate 1 is a tempered glass substrate. The lower substrate 2 is a plastic substrate. The curved surface screen that toughened glass base plate and plastic substrate combine can enough reach better shape effect of preapring for an unfavorable turn of events, can realize the crooked demand of curved surface screen again. Therefore, the problem of pixel dislocation can be well solved on the premise of ensuring the bending requirement of the curved screen, the cost is low, and the processing and manufacturing are convenient.

Further, the thickness of the upper substrate 1 is smaller than that of the lower substrate 2. In one example, the thickness of the upper substrate 1 is 2/3-3/4 of the thickness of the lower substrate 2. With this arrangement, on the basis of reducing the risk of deformation of the upper substrate 1 and the lower substrate 2, the color display effect is improved as much as possible, and the color display effect can reach the color display effect of the conventional CF layer 22 disposed on the upper substrate 1.

The width of the upper substrate 1 is approximately the same as the width of the lower substrate 2, and the length of the upper substrate 1 is slightly smaller than the length of the lower substrate 2. After the upper substrate 1 and the lower substrate 2 are bonded, the side edges of three sides of the lower substrate 2 are approximately flush with the corresponding side edges of the upper substrate 1, and the side edges of the other side of the lower substrate 2 protrude out of the upper substrate 1. A drive IC23 is provided on the lower substrate 2 at a portion protruding from the upper substrate 1. Moreover, the portion of the lower substrate 2 protruding from the upper substrate 1 is bent to a lesser extent than other portions of the lower substrate 2 (i.e., the portion overlapping with the upper substrate 1) so as to reduce the risk of deformation of the portion of the lower substrate 2 protruding from the upper substrate 1, thereby further reducing the risk of deformation of the lower substrate 2 as a whole.

In addition, an upper alignment film and an upper PS12 stacked outside the VCOM layer 11 are also provided on the upper substrate 1. The upper alignment film may be a PI (Polyimide) film. The alignment film can arrange liquid crystal molecules according to a certain pretilt angle, so that the light passing direction is controlled, and the display purpose is achieved through proper driving voltage. By providing a PS (photospacer), the mechanical strength can be appropriately enhanced, the contrast can be improved, and the uniformity can be increased.

The CF layer 22 of the lower substrate 2 may be directly plated outside the TFT layer 21, i.e., no insulating layer is provided between the CF layer 22 and the TFT layer 21. The layout of the CF layer 22 is the same as the layout of the CF layer 22 disposed on the upper substrate 1, and details thereof are not repeated herein. Meanwhile, a lower alignment film and a lower PS outside the CF layer 22 are also provided on the lower substrate 2. The lower alignment film is matched with the upper alignment film. The lower PS cooperates with the upper PS.

When the curved screen is manufactured, the lower substrate 2 may be manufactured first, or the upper substrate 1 may be manufactured first. As shown in fig. 3, the step of manufacturing the lower substrate 2 includes manufacturing the planar lower substrate 2, and then sequentially manufacturing the TFT layer 21, the CF layer 22, the lower alignment film, and the lower PS on the planar lower substrate 2. The step of fabricating the upper substrate 1 includes fabricating the planar upper substrate 1, then sequentially fabricating the VCOM layer 11, the upper alignment film and the upper PS12 on the planar upper substrate 1, and then thermally bending the upper substrate 1 to a desired curvature.

After the lower substrate 2 and the upper substrate 1 are manufactured, the lower substrate 2 is attached to the bent upper substrate 1 through the frame rubber 3, and then the frame rubber 3 is subjected to thermosetting, so that the frame rubber 3 fixedly adheres the upper substrate 1 and the lower substrate 2 together. And finally, filling liquid crystal in vacuum and sealing, namely filling liquid crystal in a cavity surrounded by the frame glue 3 in vacuum and sealing to form a curved screen, namely a curved display panel.

The curved screen manufactured by the method has the advantages of simple structure, convenience in processing and manufacturing and reduction of risk of pixel dislocation.

Note that the upper substrate 1 and the lower substrate 2 have the same degree of curvature at the overlapping portion, so that the lower substrate 2 is supported by the upper substrate 1.

Of course, in another manufacturing method, after the planar upper substrate 1 and the planar lower substrate 2 are manufactured, the planar upper substrate 1 and the planar lower substrate 2 may be bonded together, and then the bend filling may be performed.

The above description is for illustrative purposes only and is not intended to be limiting, and the present invention is not limited to the above embodiments, and many modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

Claims

1. A curved screen, comprising:

the upper substrate is provided with a VCOM layer and is a rigid base material;

2. The curved screen of claim 1, wherein the lower substrate is a plastic substrate.

3. A curved screen according to claim 2, wherein the upper substrate is a toughened glass substrate.

4. The curved screen of claim 3, wherein the lower substrate is attached to the pre-curved upper substrate.

5. The curved screen of claim 3, wherein the upper substrate has a thickness less than a thickness of the lower substrate.

6. The curved panel according to any one of claims 1-5, wherein the lower substrate is further provided with a lower alignment film and a lower PS stacked outside the CF layer, and the upper substrate is provided with an upper alignment film and an upper PS stacked outside the VCOM layer.

7. The curved screen of claim 6, wherein the lower alignment film and the upper alignment film are both PI films.

8. The curved screen of any one of claims 1-5, wherein three sides of the lower substrate are flush with corresponding sides of the upper substrate, another side of the lower substrate protrudes from the upper substrate, and a side of the lower substrate protruding from the upper substrate is provided with a driving IC.

9. The curved screen of claim 8, wherein the portion of the lower substrate protruding from the upper substrate is bent to a lesser degree than other portions of the lower substrate.