CN114694518B

CN114694518B - Spliced display screen

Info

Publication number: CN114694518B
Application number: CN202210418789.7A
Authority: CN
Inventors: 魏屈平; 鲜于文旭
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2023-07-25
Anticipated expiration: 2042-04-20
Also published as: CN114694518A

Abstract

The application discloses splice display screen, splice display screen include first base plate, two at least second base plates and extinction functional layer. The two second substrates are arranged on the first substrate at intervals, and a gap exists between the two adjacent second substrates. The extinction functional layer is arranged on one surface of the first substrate, which is far away from the second substrate, and the extinction functional layer shields the gap. Because there is the gap when two adjacent second base plates splice for the splice display screen is under the screen state of calming the anger, and the gap is clear visible, consequently, this application embodiment sets up extinction functional layer in the one side that the second base plate was kept away from to first base plate, because extinction functional layer has the characteristic of light-tight, consequently, can be used to reduce the colour difference of the display area and the gap department of splice display screen under the screen state of calming the anger, realizes "integrative black" display effect.

Description

Spliced display screen

Technical Field

The application relates to the technical field of display, in particular to a spliced display screen.

Background

With the continuous expansion of display screen applications in the commercial field, the demand for various oversized display screens is increasing. Usually, the oversized display screen is formed by splicing small-size display screens into large-size display screens through a splicing technology. Although the gap of the current spliced screen is almost invisible in the bright screen state, the gap at the spliced position is still clearly visible in the screen-extinguishing state, so that the product can generate a cracking sense, and the splicing taste of the spliced display screen is affected.

Disclosure of Invention

The embodiment of the application provides a spliced display screen, which is used for reducing the color difference of the display area and the gap of the spliced display screen in a screen-extinguishing state and realizing the display effect of 'integral black'.

The embodiment of the application provides a spliced display screen, which comprises:

a first substrate;

at least two second substrates, wherein the two second substrates are arranged on the first substrate at intervals, and a gap exists between two adjacent second substrates;

the extinction functional layer is arranged on one surface of the first substrate, which is far away from the second substrate, and the extinction functional layer shields the gap;

the first optical film layer covers one surface of the two second substrates far away from the first substrate and shields the gap, wherein the reflectivity of the light of the first optical film layer is less than or equal to 5%;

the second optical film layer is arranged on one surface of the first optical film layer, which is close to the second substrate;

the polaroid is arranged on one surface of the second optical film layer, which is close to the second substrate; the polaroid comprises at least two sub-polaroids, and one sub-polaroid is arranged corresponding to one second substrate;

the third optical film layer is arranged on one surface, close to the polaroid, of the second optical film layer, the third optical film layer shields the gap, and the reflectivity of light of the third optical film layer is less than or equal to 5%.

Optionally, in some embodiments provided herein, the polarizer blocks the slit.

Optionally, in some embodiments provided herein, at least two second substrates share a first substrate, where the first substrate includes a display area and a frame area located at one side of the display area, and the first substrate includes:

a substrate;

the driving circuit layer is arranged on one surface of the substrate far away from the extinction functional layer;

the conductive pad is arranged on one surface of the driving circuit layer, which is far away from the substrate, and corresponds to the display area;

the conductive part is arranged on one surface of the conductive pad, which is far away from the driving circuit layer;

the driving chip is arranged on the driving circuit layer and corresponds to the frame area.

Optionally, in some embodiments provided herein, the second substrate includes a light emitting structure and a connection pad, where the connection pad is disposed on a surface of the light emitting structure near the first substrate and is connected to the first substrate.

Optionally, in some embodiments provided herein, the first substrate includes a plurality of first sub-substrates that are arranged in a spliced manner, one of the second substrates is arranged on one of the first sub-substrates, one of the first sub-substrates drives the corresponding one of the second substrates to emit light, and two adjacent first sub-substrates that are arranged in a spliced manner have the gap.

Optionally, in some embodiments provided herein, the first substrate includes a plurality of first sub-substrates that are spliced and disposed, one of the second substrates is disposed on the first sub-substrate, and two adjacent first sub-substrates that are spliced and disposed have the gap, the first sub-substrate is a driving substrate, the second substrate is a color film substrate, and the spliced display screen further includes a liquid crystal layer, where the liquid crystal layer is disposed between the first sub-substrate and the second substrate.

The embodiment of the application provides a spliced display screen, which comprises a first substrate, at least two second substrates and a extinction functional layer. The two second substrates are arranged on the first substrate at intervals, and a gap exists between the two adjacent second substrates. The extinction functional layer is arranged on one surface of the first substrate, which is far away from the second substrate, and the extinction functional layer shields the gap.

Because there is the gap when two adjacent second base plates splice for the splice display screen is under the screen state of calming the anger, and the gap is clear visible, consequently, this application embodiment sets up extinction functional layer in the one side that the second base plate was kept away from to first base plate, because extinction functional layer has the characteristic of light-tight, consequently, can be used to reduce the colour difference of the display area and the gap department of splice display screen under the screen state of calming the anger, realizes "integrative black" display effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic plan view of a tiled display screen according to a comparative embodiment of the present application;

fig. 2 is a schematic plan view of a tiled display screen according to an embodiment of the present application;

fig. 3 is a schematic cross-sectional view of a first exemplary embodiment of a tiled display screen;

fig. 4 is a schematic structural diagram of a first substrate according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram of a second structure of a tiled display screen according to an embodiment of the present application;

fig. 6 is a schematic diagram of a third structure of a tiled display screen according to an embodiment of the present application;

fig. 7 is a schematic diagram of a fourth structure of a tiled display screen according to an embodiment of the present application.

Detailed Description

For a better understanding of the objects, technical solutions and advantages of the present application, reference should be made to the following detailed description of the present application with reference to the drawings, wherein like reference numerals refer to like elements throughout, and the following description is based on the embodiments of the present application shown, which should not be construed as limiting other embodiments not described herein. The word "embodiment" is used in this specification to mean an example, instance, or illustration.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The embodiment of the application provides a spliced display screen. The following will describe in detail. The following description of the embodiments is not intended to limit the preferred embodiments.

The spliced display screen provided by the application is described in detail below through specific embodiments.

Referring to fig. 1, fig. 1 is a schematic plan view of a tiled display screen according to a comparative embodiment of the present application. As shown in fig. 1, there is an obvious gap S in the display screen when the display screen is spliced in the off-screen state. The gap S can not be completely combined together and is reserved when the display panel is spliced, and the gap S can disappear due to strong light effect when the display panel is in bright screen display because the gap of the current spliced screen can be 0.8mm, but the gap S is still clearly visible when the display panel is in bright screen display, so that the spliced display screen can generate a split feeling, and the attractiveness of the spliced display screen is influenced.

Referring to fig. 2 and fig. 3, fig. 2 is a schematic plan view of a tiled display screen according to an embodiment of the present application. Fig. 3 is a schematic cross-sectional view of a first exemplary embodiment of a tiled display screen according to the present disclosure. The embodiment of the application provides a tiled display screen 100, wherein the tiled display screen 100 comprises a first substrate 10, at least two second substrates 20 and a extinction functional layer 30. Wherein, two second substrates 20 are arranged on the first substrate 10 at intervals, and a gap S exists between two adjacent second substrates 10. The extinction functional layer 30 is disposed on a surface of the first substrate 10 away from the second substrate 20, and the extinction functional layer 30 shields the slit S.

Because there is a gap S when two adjacent second substrates 20 are spliced, the spliced display screen 100 is in a screen-off state, and the gap S is clearly visible, therefore, in the embodiment of the application, the extinction functional layer 30 is arranged on the surface, far away from the second substrates 20, of the first substrate 10, and because the extinction functional layer 30 has the characteristic of light-tightness, the color difference between the display area of the spliced display screen 100 and the gap S can be reduced in the screen-off state.

It should be noted that, the screen-off state of the tiled display screen 100 refers to a mode of a mobile phone, a tablet computer, a computer or a large-sized display screen, and when the display screen is in a locked state, a partial area of the screen remains bright to display information such as time and notification. The user can see the current time, electricity, date and other information without activating the homepage.

It should be understood that the display area in the embodiment of the present application is an area corresponding to the second substrate 20, but when the gap S is small enough and the tiled display screen 100 is in the display state, the area corresponding to the gap S can also be displayed.

Referring to fig. 3 and fig. 4, fig. 4 is a schematic structural diagram of a first substrate according to an embodiment of the present application. In the embodiment of the present application, at least two second substrates 20 share a first substrate 10. The first substrate 10 includes a display region and a frame region at one side of the display region, and the first substrate 10 includes a base 101, a driving circuit layer 102, a conductive pad 103, a conductive portion 104, and a driving chip 105. The driving circuit layer 102 is disposed on a side of the substrate 101 remote from the extinction-function layer 30. The conductive pad 103 is disposed on a surface of the driving circuit layer 102 away from the substrate 101, and the conductive pad 103 corresponds to the AA display area. The conductive portion 104 is disposed on a side of the conductive pad 103 away from the driving circuit layer 102. The driving chip 105 is disposed on the driving circuit layer 102 and corresponds to the frame area NA.

In the embodiment of the application, the first substrate 10 and the at least two second substrates 20 are used for splicing, so that the splicing efficiency is improved, and dislocation during splicing can be prevented.

The driving circuit layer 102 is mainly a driving integrated circuit, and mainly includes a thin film transistor and an insulating layer for insulating each conductor or semiconductor.

The conductive pad 103 is an electrical signal bridge, and can transmit an electrical signal of the first substrate 10 to the second substrate 20, so as to drive the tiled display screen 100 to display. In some embodiments, the conductive pad 103 may be a protruding or recessed form of a pad, but is not limited thereto.

In some embodiments, the conductive portion 104 may be one or more of an Anisotropic Conductive Adhesive (ACA), an anisotropic conductive adhesive, a metal solder, a solder paste, a liquid metal, etc., but is not limited thereto. Among them, the anisotropic conductive paste (ACA) includes an Anisotropic Conductive Film (ACF) and an Anisotropic Conductive Paste (ACP). The conductivity of the anisotropic conductive paste is determined by the weight percentage of the conductive filler or the number of conductive particles per unit area. In conventional anisotropic conductive adhesives, conductive particles are randomly distributed in a gel matrix. The anisotropic conductive adhesive generally includes an adhesive matrix and a plurality of conductive particles within the adhesive matrix. Advantages of anisotropic conductive adhesives include the ability to provide electrical conduction in the z-axis or vertical direction (i.e., the middle pad) while providing substantial electrical insulation in the horizontal direction (i.e., insulating adjacent pads of the substrate). The current density through the interconnect may be defined by the loading or density of particles in a given volume of adhesive film, and the surface area of the interface coupling the contacts. Increasing the number of conductive particles results in an increase in current density.

Wherein the driving chip 105 is assembled on the driving circuit layer 102 through Bonding (Bonding). In the embodiment of the present application, the driving Chip 105 is disposed On the first substrate 10, that is, a Chip On Glass (COG) packaging technology is adopted. The driving IC is directly packaged on the liquid crystal glass through anisotropic conductive Adhesive (ACF), so that the driving IC conductive bumps and the ITO transparent conductive pads on the liquid crystal glass are interconnected and packaged together, and the screen is lightened. For designers of industrial displays, vehicle-mounted displays, and portable devices, COG packaging technology has many advantages over conventional packaging in that the display module is thinner, more reliable, flexible design is provided for the customer, and more cost-effective.

In some embodiments, the driving chip 105 is disposed on a flexible circuit board (not shown in the figures), and the driving chip 105 is bent to a side of the first substrate 10 away from the second substrate 20 along a side of the first substrate 10 along with the flexible circuit board. That is, the driving Chip 105 and the flexible circuit board constitute a Chip On Flex (or Chip On Film, COF) structure. The flip chip film is a die-to-die packaging technology for fixing an Integrated Circuit (IC) on a flexible circuit board, and combines a chip with a flexible substrate circuit by using a flexible additional circuit board as a package chip carrier, or a flexible additional circuit board of a single-finger unpackaged chip, including tape-in-package (TAB substrate, its manufacturing process is called TCP), a flexible board-connected chip assembly, and a flexible IC carrier package. The bonding is realized by using the flip chip film technology, the frame of the spliced display screen 100 is reduced, and the narrow frame design of the spliced display screen 100 is realized.

The second substrate 20 includes a light emitting structure 201 and a connection pad 202. The connection pad 202 is disposed on a surface of the light emitting structure 201 near the first substrate 10, and is connected to the first substrate 10. The light emitting structure 201 is electrically connected with the conductive pad 103 through the connection pad 202, and the conductive pad 103 can transmit the electrical signal of the first substrate 10 to the light emitting structure 201, so as to drive the tiled display screen 100 to display.

In some embodiments, the Light Emitting structure 201 may be a quantum dot Light Emitting Diode (Quantum Dot Light Emitting Diode, QLED) Light Emitting structure, an Organic Light-Emitting Diode (OLED) Light Emitting structure, a quantum dot Organic Light Emitting Diode (QD-OLED) Light Emitting structure, a Micro Light-Emitting Diode (Micro LED) Light Emitting structure, a sub-millimeter Light Emitting Diode (Mini LED) Light Emitting structure.

The extinction functional layer 30 is disposed on a side of the first substrate 10 remote from the second substrate 20. The extinction-function layer 30 has a light-impermeable characteristic. In some embodiments, the light transmittance of the extinction-function layer 30 is less than 0%, and in some embodiments, the chromaticity value of the extinction-function layer 30 is near zero. It should be understood that the lower the chromaticity value, the smaller the light transmittance of the extinction-function layer 30, and the better the extinction effect.

In some embodiments, the extinction functional layer 30 may cover the entire surface of the first substrate 10 away from the second substrate 20. Alternatively, in another embodiment, the matting functional layer 30 only shields the slit S, and its width is larger than that of the matting functional layer 30.

In some embodiments, the material of the matting functional layer 30 may be selected from one or any combination of Polyimide (Polyimide, PI), cyclic olefin polymer (Cyclic Olefin Polymers, COP), triallyl cyanurate (Triallyl Cyanurate, TAC), polymethyl methacrylate (Polymethyl Methacrylate, PMMA), polycarbonate (PC), ultra-Thin Glass (UTG), transparent Polyimide film (Transparent Polyimide Film, CPI), polyethylene terephthalate (Polyethylene Terephthalate, PET), etc., or the material of the matting functional layer 30 may also be selected from black matting paint, for example, black ink or black metal oxide, etc.

In some embodiments, the tiled display screen 100 further includes a substrate 70, the substrate 70 being disposed on a side of the extinction-function layer 30 remote from the first substrate 10. The substrate 70 is used for protecting the extinction function layer 30, and preventing the extinction function layer 30 from being damaged when the tiled display screen 100 is impacted, thereby affecting the extinction performance of the extinction function layer 30. The substrate 70 is made of a wear-resistant polymer material such as Phenolic Resin (PF).

With continued reference to fig. 3, the tiled display screen 100 further includes a first optical film layer 401. The reflectance of light of the first optical film layer 401 is less than or equal to 5%.

The first optical film 401 has lower reflectivity of light, and when external light is incident to the spliced display screen 100 from the first optical film 401, only a small amount of light is reflected to human eyes, so that the first optical film 401 is matched with the extinction functional layer 30, color difference between a display area and a gap S in a screen-extinguishing state is further reduced, and a better integral black display effect is achieved.

In some embodiments, the light reflectivity of the first optical film layer 401 may be any one of 0%, 0.5%, 1%, 1.5%, 2%, 3%, 4.5%, or 5. Preferably, the reflectivity of the light of the first optical film layer 401 is less than or equal to 2%. It should be understood that, when the reflectivity of the light of the first optical film 401 is lower, the light reflected by the first optical film 401 to the human eye is less, and in the off-screen state, the color difference between the display area and the slit S is smaller, and the "integral black" effect is better.

In some embodiments, the material of the first optical film layer 401 may be selected from one of Polyimide (PI), cyclic olefin polymer (Cyclic Olefin Polymers, COP), triallyl cyanurate (Triallyl Cyanurate, TAC), polymethyl methacrylate (Polymethyl Methacrylate, PMMA), polycarbonate (PC), ultra-Thin Glass (UTG), transparent Polyimide film (Transparent Polyimide Film, CPI), and the like, or any combination thereof.

Optionally, the tiled display screen 100 further includes a second optical film 402 and a polarizer 403. The second optical film 402 is disposed on a surface of the first optical film 401 near the second substrate 20. The polarizer 403 is disposed on a surface of the second optical film 402 near the second substrate 20. Wherein the second optical film 402 has a high light transmittance, and in some embodiments, the light transmittance of the second optical film 402 is greater than or equal to 90%. The polarizer 403 has a low reflectance of light and has an "integral black" display effect. In some embodiments, the reflectance of light from polarizer 403 is less than or equal to 5%. The reflectance of light of the polarizer 403 refers to the reflectance of external light passing through the polarizer 403.

In the embodiment of the present application, the polarizer 403 is disposed on the whole surface, that is, the polarizer 403 is disposed on the second substrate 20 and blocks the seam S.

The tiled display screen 100 may further include an adhesive layer 50, where the adhesive layer 50 is used to tightly adhere the first substrate 10 and the second substrate 20 together, and completely wrap the conductive pad 103, the connection pad 202, and the conductive portion 104, so that the first substrate 10 and the second substrate 20 are tightly adhered, the adhesion reliability between the first substrate 10 and the second substrate 20 is enhanced, and a protective layer is formed between the conductive portion 104 and the pad, so as to prevent the conductive portion 104 and the pad from being damaged by water and oxygen. The adhesive layer 50 is a conventional silicone gel, acrylic gel, epoxy gel, polyurethane, or the like.

Referring to fig. 5, fig. 5 is a schematic diagram of a second structure of a tiled display screen according to an embodiment of the present application. The difference between the tiled display screen 100 provided in the embodiment of the present application and the tiled display screen 100 provided in fig. 3 is that the polarizer 403 includes at least two sub-polarizers 4031, and one sub-polarizer 4031 is disposed corresponding to one second substrate 20. The tiled display screen 100 also includes a third optical film layer 404. The third optical film 404 is disposed on a surface of the second optical film 402 near the polarizer 403, and the third optical film 404 blocks the slit S. The reflectance of light of the third optical film layer 404 is less than or equal to 5%.

In the embodiment of the present application, since one sub-polarizer 4031 corresponds to a second substrate 20, a gap S is also formed between two adjacent sub-polarizers 4031, so as to further reduce the color difference between the display area and the gap S, and achieve a better "integral black" display effect, in the embodiment of the present application, a third optical film layer 404 is disposed on one side of the second optical film layer 402, which is close to the polarizer 403, and the third optical film layer 404 shields the gap S. The first optical film 401 and the third optical film 404 are matched with the extinction functional layer 30, so that the color difference between the display area and the gap S in the screen-off state is further reduced or even eliminated, and a better integral black display effect is realized.

In some embodiments, the light reflectivity of the third optical film layer 404 may be any of 0%, 0.5%, 1%, 1.5%, 2%, 3%, 4.5%, or 5. Preferably, the reflectance of light of the third optical film layer 404 is less than or equal to 2%. It should be appreciated that when the reflectivity of the light of the third optical film layer 404 is lower, the less light is reflected to the human eye by the third optical film layer 404, and in the off-screen state, the smaller the color difference between the display area and the slit S, the better the "integral black" effect.

In some embodiments, the material of the third optical film layer 404 may be selected from one of Polyimide (PI), cyclic olefin polymer (Cyclic Olefin Polymers, COP), triallyl cyanurate (Triallyl Cyanurate, TAC), polymethyl methacrylate (Polymethyl Methacrylate, PMMA), polycarbonate (PC), ultra-Thin Glass (UTG), transparent Polyimide film (Transparent Polyimide Film, CPI), and the like, or any combination thereof. The material of the third optical film layer 404 and the material of the first optical film layer 401 may be the same or different.

Referring to fig. 6, fig. 6 is a schematic diagram of a third structure of a tiled display screen according to an embodiment of the present application. The difference between the tiled display screen 100 provided in the embodiment of the present application and the tiled display screen provided in fig. 5 is that the first substrate 10 includes a plurality of first sub-substrates 10a disposed at intervals, and a second substrate 20 is disposed on a first sub-substrate 10a. A first sub-substrate 10a drives a corresponding second substrate 20 to emit light, and a gap S exists between two adjacent first sub-substrates 10a which are arranged in a spliced manner. In the embodiment of the present application, the tiled display screen 100 is formed by stitching a plurality of display panels that emit light independently. Providing a variety of options for the customer.

Referring to fig. 7, fig. 7 is a schematic diagram of a fourth structure of a tiled display screen according to an embodiment of the present application. The difference between the tiled display screen provided in this embodiment and the tiled display screen 100 provided in fig. 6 is that the first sub-substrate 10a is a driving substrate, and the second substrate 20 is a color film substrate. The tiled display screen 100 further includes a liquid crystal layer 60, the liquid crystal layer 60 being disposed between the first sub-substrate 10a and the second substrate 20. In the embodiment of the present application, the tiled display screen 100 is formed by stitching a plurality of lcd panels that emit light independently, and provides a plurality of choices for customers.

In this application embodiment, the luminous subassembly simple structure does not need complicated son-mother board concatenation, just can splice into super large size concatenation screen through the luminous subassembly directly.

In summary, although the present application has been described with reference to the preferred embodiments, the preferred embodiments are not intended to limit the application, and those skilled in the art can make various modifications and adaptations without departing from the spirit and scope of the application, and the scope of the application is therefore defined by the claims.

Claims

1. A tiled display screen, comprising:

a first substrate;

2. The tiled display screen according to claim 1, wherein the polarizer obscures the slit.

3. The tiled display screen of claim 1, wherein at least two of the second substrates share a first substrate, the first substrate including a display area and a bezel area on one side of the display area, the first substrate comprising:

a substrate;

4. The tiled display screen of claim 1, wherein the second substrate includes a light emitting structure and a connection pad disposed on a side of the light emitting structure proximate to the first substrate and connected to the first substrate.

5. The tiled display screen according to claim 1, wherein the first substrate includes a plurality of first sub-substrates arranged in a tiled manner, one of the second substrates is arranged on one of the first sub-substrates, one of the first sub-substrates drives the corresponding one of the second substrates to emit light, and the gaps exist between the adjacent two of the first sub-substrates arranged in a tiled manner.

6. The tiled display screen according to claim 1, wherein the first substrate comprises a plurality of first sub-substrates arranged in a tiled manner, one of the second substrates is arranged on one of the first sub-substrates, the first sub-substrates arranged in a tiled manner are provided with gaps, the first sub-substrates are driving substrates, the second substrates are color film substrates, and the tiled display screen further comprises a liquid crystal layer arranged between the first sub-substrates and the second substrates.