CN114694518A

CN114694518A - Spliced display screen

Info

Publication number: CN114694518A
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: 2022-07-01
Anticipated expiration: 2042-04-20
Also published as: CN114694518B

Abstract

The application discloses tiled display screen, tiled 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 every two adjacent second substrates. The extinction functional layer is arranged on one surface, far away from the second substrate, of the first substrate, and the extinction functional layer shields the gap. Because there is the gap when two adjacent second base plates splice for the tiled display screen is in the breath screen state, the gap is clear and visible, consequently, this application embodiment sets up the extinction functional layer in the one side that the second base plate was kept away from to first base plate, because the extinction functional layer has the lighttight characteristic, consequently, can be used for reducing the colour difference of the display area of tiled display screen and gap department under the breath screen state, realizes the display effect of "integrative black".

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 the application of display screens in the commercial field, the demand of various super-large-sized display screens is increasing. Generally, the oversized display screen is formed by splicing a small-size display screen into a large-size display screen through a splicing technology. Although the splicing seam is hardly visible when the seam of the current spliced screen is in a bright screen state, the seam at the splicing position is still clearly visible in a screen-saving state, so that the product has a splitting feeling and the splicing taste of the spliced display screen is influenced.

Disclosure of Invention

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

The embodiment of the application provides a tiled display screen, includes:

a first substrate;

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

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

Optionally, in some embodiments provided herein, the tiled display screen further includes a first optical film layer, where the first optical film layer covers two surfaces of the second substrates, which are far away from the first substrate, and blocks the gap, and a light reflectivity of the first optical film layer is less than or equal to 5%.

Optionally, in some embodiments provided in the present application, the tiled display screen further includes:

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

and the polaroid is arranged on one surface of the second optical film layer close to the second substrate.

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

Optionally, in some embodiments provided herein, the polarizer includes at least two sub-polarizers, and one of the sub-polarizers is disposed corresponding to one of the second substrates.

Optionally, in some embodiments provided by the present application, the tiled display screen further includes a third optical film layer, the third optical film layer is disposed on a surface of the second optical film layer close to the polarizer, the third optical film layer blocks the gap, and a reflectivity of light of the third optical film layer is less than or equal to 5%.

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

a substrate;

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

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

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

and 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, and the connection pad is disposed on a side of the light emitting structure close to the first substrate and connected to the first substrate.

Optionally, in some embodiments provided herein, the first substrate includes a plurality of first sub-substrates arranged in a splicing 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 first sub-substrates of two adjacent splicing arrangements have the gap.

Optionally, in some embodiments provided in the application, the first substrate includes a plurality of first sub-substrates arranged in a splicing manner, one of the second substrates is arranged on one of the first sub-substrates, and the first sub-substrates arranged in two adjacent splicing manners have the gap, the first sub-substrate is a driving substrate, the second substrate is a color filter substrate, and the splicing display screen further includes a liquid crystal layer, where the liquid crystal layer is arranged between the first sub-substrate and the second substrate.

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

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

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic plan view of a tiled display screen provided in a comparative example of the present application;

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

fig. 3 is a schematic cross-sectional view of a first tiled display screen provided in an embodiment of the present application;

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

fig. 5 is a schematic structural diagram of a second tiled display screen provided in the embodiment of the present application;

fig. 6 is a schematic structural diagram of a third tiled display screen provided in the embodiment of the present application;

fig. 7 is a fourth schematic structural diagram of a tiled display screen provided in the embodiment of the present application.

Detailed Description

For purposes of clarity, technical solutions and advantages of the present application, the present application will be described in further detail with reference to the accompanying drawings, wherein like reference numerals represent like elements throughout the several views, and the following description is based on the illustrated embodiments of the present application and should not be construed as limiting the other embodiments of the present application which are not detailed herein. The word "embodiment" as used herein means an example, instance, or illustration.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The embodiment of the application provides a spliced display screen. The following are detailed descriptions. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.

The tiled display screen provided by the present application is explained in detail by specific embodiments below.

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, the tiled display screen has a significant gap S in the screen-off state. The gap S can not be completely combined together at the edge when the display panel is spliced and the gap is reserved, and the gap of the current spliced screen can be 0.8mm, so that the gap S disappears due to the highlight effect when the bright screen displays, but is still clearly visible when the screen is turned off, so that the spliced display screen has a splitting 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 spliced display screen according to an embodiment of the present disclosure. The embodiment of the present application provides a tiled display screen 100, where the tiled display screen 100 includes a first substrate 10, at least two second substrates 20, and a light extinction functional layer 30. Two second substrates 20 are disposed on the first substrate 10 at intervals, and a gap S exists between two adjacent second substrates 10. The extinction function layer 30 is disposed on a surface of the first substrate 10 away from the second substrate 20, and the extinction function layer 30 blocks the gap S.

Because a gap S exists when two adjacent second substrates 20 are spliced, and the gap S is clearly visible when the spliced display screen 100 is in the breath screen state, in the embodiment of the present application, the extinction functional layer 30 is disposed on the side of the first substrate 10 away from the second substrate 20, and because the extinction functional layer 30 has a light-tight characteristic, the extinction functional layer can be used for reducing the color difference between the display area of the spliced display screen 100 and the gap S in the breath screen state.

It should be noted that the information screen 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 tiled display screen is in the locked state, a partial area of the screen is kept on for a long time to display information such as time and notification. The user can see the current time, power, date, etc. without activating the homepage.

It should be understood that the display area in the embodiment of the present application is the area corresponding to the second substrate 20, however, 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 4, fig. 4 is a schematic view illustrating a first structure of a first substrate according to an embodiment of the present disclosure. In the embodiment of the present application, at least two second substrates 20 share one first substrate 10. The first substrate 10 includes a display region and a frame region located at one side of the display region, and the first substrate 10 includes a substrate 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 away from the extinction functional layer 30. The conductive pad 103 is disposed on a side of the driving circuit layer 102 away from the substrate 101, and the conductive pad 103 corresponds to the AA display region. The conductive portion 104 is disposed on a surface of the conductive pad 103 away from the driver 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 present 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 the 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 pads 103 are electrical signal bridges, and can transmit electrical signals 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 pad with a protruding or recessed shape, 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, and the like, but is not limited thereto. 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 pastes, the conductive particles are randomly distributed in the glue matrix. Anisotropic conductive adhesives typically include an adhesive matrix and a plurality of conductive particles within the adhesive matrix. Advantages of anisotropic conductive adhesives include the ability to provide electrical conductivity in the z-axis or vertical direction (i.e., the middle pad) while providing substantial electrical isolation in the horizontal direction (i.e., insulating adjacent pads of the substrate). The current density through the interconnect can be defined by the loading or density of the particles in a given volume of adhesive film and the surface area of the interface of the coupling contact. Increasing the number of conductive particles results in an increase in current density.

The driver chip 105 is assembled on the driver circuit layer 102 by 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 drive IC is directly packaged on the liquid crystal glass through anisotropic conductive Adhesive (ACF), so that the conductive bumps of the drive IC 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 display, vehicle-mounted display and portable equipment, compared with the traditional packaging, the liquid crystal screen of the COG packaging technology has the advantages of thinner display module, higher reliability, flexible design for customers and more cost-effective.

In some embodiments, the driving chip 105 is disposed on a flexible circuit board (not shown), and the driving chip 105 is bent along the side of the first substrate 10 to a side of the first substrate 10 away from the second substrate 20 along the flexible circuit board. That is, the driving Chip 105 and the flexible circuit board form a Chip On Flex (or Chip On Film, COF) structure. The flip chip is a soft Chip On Film (COF) packaging technique for fixing an Integrated Circuit (IC) on a flexible circuit board, and combines a chip with a flexible substrate circuit by using a soft additional circuit board as a packaging chip carrier, or a soft additional circuit board without packaging the chip is composed of tape-on-tape packaging production (TAB substrate, the manufacturing process is called TCP), a soft board connection chip assembly and a soft IC carrier package. The embodiment of the application realizes binding by using the chip on film technology, reduces the frame of the spliced display screen 100, and realizes the narrow frame design of the spliced display screen 100.

The second substrate 20 includes a light emitting structure 201 and a connection pad 202. The connection pad 202 is disposed on a side of the light emitting structure 201 close to the first substrate 10 and connected to the first substrate 10. The light emitting structure 201 is electrically connected to the conductive pad 103 through the connection pad 202, and the conductive pad 103 can transmit an 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 (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, or a Mini Light-Emitting Diode (Mini LED) Light Emitting structure.

The extinction function layer 30 is disposed on a surface of the first substrate 10 away from the second substrate 20. The light extinction functional layer 30 has a property of being opaque to light. In some embodiments, the light transmittance of the matte functional layer 30 is less than 0% hi some embodiments, the chroma value of the matte functional layer 30 is close to zero. It is understood that the lower the chroma value, the lower the light transmittance of the matte functional layer 30, and the better the matte effect.

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

In some embodiments, the material of the light extinction functional layer 30 may be selected from one or any combination of Polyimide (PI), Cyclic Olefin Polymer (COP), Triallyl Cyanurate (TAC), Polymethyl Methacrylate (PMMA), Polycarbonate (PC), Ultra-Thin Glass (UTG), Transparent Polyimide Film (CPI), Polyethylene Terephthalate (PET), or the like, or the material of the light extinction functional layer 30 may be selected from a black light extinction paint, such as black ink or black metal oxide, or the like.

In some embodiments, the tiled display screen 100 further includes a substrate 70, the substrate 70 being disposed on a side of the matte functional layer 30 remote from the first substrate 10. The substrate 70 is used to protect the extinction function layer 30 and prevent 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 a low light reflectivity, and when external light is incident to the tiled display screen 100 from the first optical film 401, only a small amount of light is reflected to human eyes, so that the color difference between a display area and a gap S under a screen state is further reduced by using the first optical film 401 in combination with the extinction functional layer 30, and a better 'black-in-one' display effect is realized.

In some embodiments, the light reflectance 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 reflectance of 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 the chromatic aberration at the display area and the slit S is smaller in the breath-hold state, 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 (COP), Triallyl Cyanurate (TAC), Polymethyl Methacrylate (PMMA), Polycarbonate (PC), Ultra-Thin Glass (UTG), Transparent Polyimide Film (CPI), and the like, or any combination thereof.

Optionally, the tiled display screen 100 further includes a second optical film layer 402 and a polarizer 403. The second optical film layer 402 is disposed on a side of the first optical film layer 401 adjacent to the second substrate 20. The polarizer 403 is disposed on a side of the second optical film 402 close to the second substrate 20. Wherein the second optical film layer 402 has a high light transmittance, and in some embodiments, the light transmittance of the second optical film layer 402 is greater than or equal to 90%. The polarizer 403 has a low light reflectance and has a "black-in-one" display effect. In some embodiments, the light of polarizer 403 has a reflectance of 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 entire 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 adhere the first substrate 10 and the second substrate 20 together, and at the same time, completely wrap the conductive pad 103, the connection pad 202, and the conductive portion 104, which both ensure that the first substrate 10 and the second substrate 20 are adhered together, enhance the adhesion reliability between the first substrate 10 and the second substrate 20, and at the same time, form a protective layer between the conductive portion 104 and the pad to block water and oxygen from invading the conductive portion 104 and the pad. The adhesive layer 50 is a conventional silicone glue, acrylic glue, epoxy glue, polyurethane, or the like.

Referring to fig. 5, fig. 5 is a schematic view illustrating a second structure of a tiled display screen according to an embodiment of the present application. The spliced display screen 100 provided in the embodiment of the present application is different from the spliced display screen 100 provided in fig. 3 in that the polarizer 403 includes at least two sub-polarizers 4031, and one sub-polarizer 4031 is disposed corresponding to one second substrate 20. 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 close to the polarizer 403, and the third optical film 404 blocks the slit S. The light reflectivity of the third optical film layer 404 is less than or equal to 5%.

In the embodiment of the present disclosure, since one sub-polarizer 4031 corresponds to one second substrate 20, a gap S also exists between two adjacent sub-polarizers 4031, and in order to further reduce chromatic aberration between a display area and the gap S and achieve a better "black-in-one" display effect, in the embodiment of the present disclosure, a third optical film 404 is disposed on one surface of the second optical film 402 close to the polarizer 403, and the third optical film 404 blocks the gap S. The first optical film layer 401 and the third optical film layer 404 are matched with the extinction function layer 30, so that chromatic aberration of a display area and a gap S in a breath screen 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 one of 0%, 0.5%, 1%, 1.5%, 2%, 3%, 4.5%, or 5. Preferably, the light reflectivity of the third optical film layer 404 is less than or equal to 2%. It should be understood that, when the reflectivity of the light of the third optical film 404 is lower, the light reflected by the third optical film 404 to the human eye is less, and the chromatic aberration at the display area and the slit S is smaller in the breath-screen state, and the "integral black" effect is better.

In some embodiments, the material of the third optical Film layer 404 may be selected from one of Polyimide (PI), Cyclic Olefin Polymer (COP), Triallyl Cyanurate (TAC), Polymethyl Methacrylate (PMMA), Polycarbonate (PC), Ultra-Thin Glass (UTG), 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 structural diagram of a tiled display screen according to an embodiment of the present application. The tiled display panel 100 provided in the embodiment of the present application is different from the tiled display panel provided in fig. 5 in that the first substrate 10 includes a plurality of first sub-substrates 10a arranged at intervals, and a second substrate 20 is arranged on one of the first sub-substrates 10 a. 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 arranged in a splicing manner. In the embodiment of the present application, the tiled display screen 100 is formed by a plurality of display panels that emit light independently. Providing the customer with a variety of options.

Referring to fig. 7, fig. 7 is a schematic diagram illustrating 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 the embodiment of the present application 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 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 a plurality of independently-illuminated liquid crystal display panels, so as to provide a variety of options for customers.

In this application embodiment, light-emitting component simple structure does not need the concatenation of complicated primary and secondary board, directly just can splice into super large-size concatenation screen through sending the subassembly.

In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.

Claims

1. A tiled display screen, comprising:

a first substrate;

2. The tiled display screen of claim 1 further comprising a first optical film layer covering the two second substrates on the side away from the first substrate and blocking the gap, wherein the reflectivity of the first optical film layer is less than or equal to 5%.

3. The tiled display screen of claim 2, further comprising:

4. The tiled display screen of claim 3, wherein the polarizer blocks the slit.

5. The tiled display screen of claim 3, wherein the polarizer comprises at least two sub-polarizers, one of the sub-polarizers being disposed in correspondence with one of the second substrates.

6. The spliced display screen of claim 5, further comprising a third optical film layer disposed on a side of the second optical film layer adjacent to the polarizer, wherein the third optical film layer blocks the gap, and the light reflectivity of the third optical film layer is less than or equal to 5%.

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

a substrate;

8. The tiled display screen of claim 1, wherein the second substrate comprises a light-emitting structure and a connection pad, and the connection pad is disposed on a side of the light-emitting structure close to the first substrate and connected to the first substrate.

9. The tiled display screen of claim 1, wherein the first substrate comprises a plurality of first sub-substrates arranged in a tiled arrangement, 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 first sub-substrates of two adjacent tiled arrangements have the gap.

10. The spliced display screen of claim 1, wherein the first substrate comprises a plurality of first sub-substrates arranged in a spliced manner, one second substrate is arranged on one first sub-substrate, the gap exists between every two adjacent first sub-substrates arranged in a spliced manner, the first sub-substrate is a driving substrate, the second substrate is a color film substrate, and the spliced display screen further comprises a liquid crystal layer arranged between the first sub-substrate and the second substrate.