CN114170904A

CN114170904A - Display module and display device

Info

Publication number: CN114170904A
Application number: CN202111475057.3A
Authority: CN
Inventors: 付相杰; 党鹏乐; 刘仁杰
Original assignee: Hefei Visionox Technology Co Ltd
Current assignee: Hefei Visionox Technology Co Ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-03-11

Abstract

The display module that this application embodiment provided includes the screen body and drive unit. The screen body includes a non-display area. The non-display area includes a plurality of first binding areas arranged at intervals along a first direction. The driving unit includes a substrate. The substrate comprises a plurality of second binding regions arranged at intervals. The first binding areas and the second binding areas are arranged in a one-to-one correspondence manner. The substrate is provided with a gap between at least two adjacent second binding regions. Therefore, when the drive unit is bound to the screen body through the plurality of first bound regions and the plurality of second bound regions, stress of expansion deformation generated when the substrate is crimped can be relieved by the notches. Therefore, the positioning accuracy of the second binding area and the first binding area can be ensured, and the yield of products is improved.

Description

Display module and display device

Technical Field

The application relates to the technical field of display, in particular to a display module and a display device.

Background

In the production process of the display device, in order to connect the external driving signal with the corresponding line inside the display panel, it is generally necessary to bind the driving unit with the screen body. Crimping is typically required during the binding process. The connecting part of the driving unit and the screen body is easy to deviate in the crimping process, so that the product yield is influenced.

Disclosure of Invention

Accordingly, it is desirable to provide a display module and a display device for solving the above problems.

The embodiment of the application provides a display module assembly, include:

the display screen comprises a screen body and a display screen, wherein the screen body comprises a non-display area, and the non-display area comprises a plurality of first binding areas which are arranged at intervals along a first direction;

the driving unit comprises a substrate, the substrate comprises a plurality of second binding areas arranged at intervals, the first binding areas and the second binding areas are arranged in a one-to-one correspondence mode, a gap is formed in the substrate between at least two adjacent second binding areas, and the driving unit is bound on the screen body through the first binding areas and the second binding areas.

In one embodiment, each of the second bonding regions has a plurality of terminals spaced along the first direction, and a ratio of a farthest distance between opposite ends of the terminals in the first direction to a farthest distance between opposite ends of the terminals in a second direction, which intersects the first direction, is 1/2 to 5/1.

In one embodiment, the terminals are rectangular in configuration.

In one embodiment, the terminals are triangular in configuration.

In one embodiment, the triangular structures include bases extending in the same direction as the first direction, the bases of two adjacent triangular structures are located at two opposite ends of the second direction, and projections of the bases of two adjacent triangular structures in the second direction have an overlapping portion.

In one embodiment, the triangular structure is an equilateral triangle.

In one embodiment, a ratio of a farthest distance between opposite ends of the terminals in the first direction to a farthest distance between the terminals in the second direction is 1.

In one embodiment, the plurality of second bonding regions and the notches are located at the same end of the substrate, the notches penetrate through the substrate along the thickness direction of the substrate and extend to the edge of the substrate along the second direction, and the cross-sectional area of the notches increases in a stepwise manner from the middle of the substrate to the edge of the substrate.

In one embodiment, the bottom of the notch is of an arc-shaped structure.

The embodiment of the application further provides a display device, and the display device comprises the display module in the embodiment.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a tiled structure of a display module according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a tiled structure of a display module according to the prior art;

fig. 3 is a schematic view of a tiled structure of a display module according to another embodiment of the present application.

Description of reference numerals:

the display module assembly 10, the screen body 100, the first bonding region 110, the pad 111, the display region 120, the non-display region 130, the first mark bit 112, the driving unit 200, the substrate 210, the second bonding region 220, the terminal 221, the gap 230, and the second mark bit 222

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention 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.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Spatially relative terms such as "upper" and "lower" are defined herein with reference to the drawings. Thus, it will be understood that "upper" and "lower" may be used interchangeably. It will be understood that when a layer is referred to as being "on" another layer, it can be formed directly on the other layer, or intervening layers may also be present. Thus, it will be understood that when a layer is referred to as being "directly on" another layer, there are no intervening layers interposed therebetween.

In the drawings, the size of layers and regions may be exaggerated for clarity. It will be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. In addition, it will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present. Like reference numerals refer to like elements throughout.

Hereinafter, although terms such as "first", "second", and the like may be used to describe various components, the components are not necessarily limited to the above terms. The above terms are only used to distinguish one component from another. It will also be understood that expressions used in the singular include expressions of the plural unless the singular has a distinctly different meaning in the context. Furthermore, in the following embodiments, it will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features or components, but do not preclude the presence or addition of one or more other features or components.

In the following embodiments, when layers, regions or elements are "connected", it may be interpreted that the layers, regions or elements are not only directly connected but also connected through other constituent elements interposed therebetween. For example, when layers, regions, elements, etc. are described as being connected or electrically connected, the layers, regions, elements, etc. may be connected or electrically connected not only directly or directly but also through another layer, region, element, etc. interposed therebetween.

As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. When a statement such as "at least one (or" an) of … … is placed after a list of elements (elements), the entire list of elements (elements) is modified rather than modifying individual elements (elements) in the list.

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 invention belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

The inventors have found that during the production of the display device, it is necessary to connect external driving signals to corresponding lines inside the display panel. The external drive signal is typically sent by a drive unit. The driving unit generally includes a driving chip and a flexible circuit board. The driving chip is arranged on the flexible circuit board. The driving unit is bound on the display panel through the flexible circuit board. In the process of binding the driving unit to the display panel, the flexible circuit board and the display panel need to be pressed together by using a material such as Anisotropic Conductive Film (ACF). However, the substrate of the flexible circuit board is generally a plastic-based material. It is easily expanded and deformed during the crimping process, particularly, the thermal compression bonding process. After the flexible circuit board expands and deforms, the terminals on the flexible circuit board and the bonding pads on the display panel cannot be aligned accurately. Thus affecting the transmission of the drive signal.

Referring to fig. 1, an embodiment of the present application provides a display module 10. The display module 10 includes a screen body 100 and a driving unit 200. The screen body 100 includes a non-display area 130. The non-display region 130 includes a plurality of first binding regions 110 arranged at intervals along a first direction. The driving unit 200 includes a substrate 210. The substrate 210 includes a plurality of second bonding regions 220 arranged at intervals. The first binding region 110 and the second binding region 220 are disposed in a one-to-one correspondence. Between at least two adjacent second bonding regions 220, the substrate 210 is provided with a gap 230. The driving unit 200 is bound to the panel body 100 through the plurality of first binding regions 110 and the plurality of second binding regions 220.

The screen body 100 may be an OLED (Organic Light-Emitting Diode) Display screen, a flexible Liquid Crystal Display (LCD), or other types of Display screens. The screen body 100 may also be a rigid or flexible display screen. The non-display area 130 may be a frame area of the screen body 100. The screen body 100 may also include a display area 120. The non-display area 130 may be disposed around the display area 120. In one embodiment, as shown in fig. 1, the non-display area 130 may be located at an upper edge of the display area 120.

The first direction may be a length or width direction of the screen body 100. The second bonding regions 220 may be arranged at intervals along the length direction or the width direction of the panel 100. Each of the second bonding regions 220 may be provided with a plurality of terminals 221. The first bonding region 110 may be provided with a plurality of pads 111. The plurality of pads 111 may be used to electrically connect with the driving unit 200. The plurality of pads 111 may be electrically connected to the plurality of terminals 221. The driving unit 200 may include a driving chip and the substrate 210. In one embodiment, the driving chip may include a driving controller, a gate driver, a gamma reference voltage generator, a data driver, an emission driver, and the like.

The substrate 210 may be a flexible circuit board (FPC) or a Chip On Film (COF). The substrate 210 may be a polyester-based material. The substrate 210 may be provided with a plurality of the terminals 221 in one-to-one correspondence with the plurality of pads 111. The plurality of first binding regions 110 and the plurality of second binding regions 220 are disposed in one-to-one correspondence. That is, the number of the first binding regions 110 and the number of the second binding regions 220 may be the same. The shape of the first binding region 110 and the shape of the second binding region 220 may also be the same. The intervals between the plurality of first binding regions 110 and the intervals between the plurality of second binding regions 220 are also the same. The plurality of second binding regions 220 may be arranged linearly. When the plurality of second binding regions 220 are bound to the plurality of first binding regions 110, the plurality of second binding regions 220 are also arranged along the first direction. A plurality of the second binding regions 220 may be located at the edge of the substrate 210 so that the second binding regions 220 are bound with the first binding regions 110.

In the substrate 210, the gap 230 may be opened between at least two adjacent second bonding regions 220. When the panel 100 and the driving unit 200 are crimped to bind the driving unit 200 to the panel 100, the notches 230 may function to release the expansion stress generated by the base 210 when crimped. The gap 230 can reduce or avoid the misalignment of the second binding area 220 with respect to the first binding area 110. In one embodiment, the gap 230 may be disposed between every two adjacent second binding regions 220. Therefore, the accuracy of binding alignment of the plurality of first binding regions 110 and the plurality of second binding regions 220 can be ensured.

The notch 230 may penetrate through the substrate 210 along the thickness direction of the substrate 210, or may penetrate through a portion of the substrate 210. The notch 230 may be disposed at the edge of the substrate 210, or may be disposed at the middle of the substrate 210, as long as the substrate 210 can play a role in releasing the expansion stress generated when the substrate 210 is crimped.

The display module 10 provided in the embodiment of the present application includes a screen body 100 and a driving unit 200. The screen body 100 includes a non-display area 130. The non-display region 130 includes a plurality of first binding regions 110 arranged at intervals along a first direction. The driving unit 200 includes a substrate 210. The substrate 210 includes a plurality of second bonding regions 220 arranged at intervals. The first binding region 110 and the second binding region 220 are disposed in a one-to-one correspondence. The substrate 210 defines a gap 230 between at least two adjacent second bonding regions 220. Accordingly, when the driving unit 200 is bound to the panel 100 through the plurality of first binding regions 110 and the plurality of second binding regions 220, stress of expansion deformation generated when the substrate 210 is crimped may be relieved by the notches 230. Therefore, by providing the gap 230 on the substrate 210, the positioning accuracy of the second bonding region 220 and the first bonding region 110 can be ensured, and the yield of the product can be improved.

In one embodiment, each of the second bonding regions 220 includes a plurality of terminals 221 spaced along the first direction. The ratio of the farthest distance between the opposite ends of the terminal 221 in the first direction to the farthest distance between the opposite ends of the terminal 221 in the second direction, which cross the first direction, is 1/2 to 5/1.

When the driving unit 200 is bound to the panel body 100, the plurality of terminals 221 are arranged along the first direction. The plurality of terminals 221 may have the same shape. The farthest distance between the opposite ends of the terminal 221 in the first direction may be the longest length of the terminal 221 in the first direction. The farthest distance between the opposite ends of the terminal 221 in the second direction may be the longest length of the terminal 221 in the second direction. The first direction and the second direction may be perpendicular to each other. The first direction may be a width direction of the panel 100 when the driving unit 200 is bound to the panel 100. The second direction may be a length direction of the screen body 100 when the driving unit 200 is bound to the screen body 100.

When the driving unit 200 is bonded to the panel body 100, it is generally required to ensure that the pad 111 and the terminal 221 have a certain contact area, so as to ensure that the contact position of the pad 111 and the terminal 221 has a small resistance. Referring to fig. 2, in the conventional technology, the terminal 221 is located at a frame of the screen body 100. That is, the terminals 221 are generally disposed at the edge of the screen body 100 in the second direction.

In one embodiment, the ratio of the first direction (width direction) to the second direction (length direction) of the terminal 221 is generally 1/50. That is, in the case where the contact area of the terminal 221 with the pad 111 is ensured to be constant, the length of the terminal 221 in the second direction is long. Correspondingly, the pad 111 also needs to occupy a larger area in the second direction of the non-display area 130. The length of the bezel of the screen body 100 in the second direction is increased. The length of the non-display area 130 of the screen body 100 in the second direction is increased, and thus the effect of a narrow bezel cannot be achieved.

By setting the ratio of the farthest distance between the opposite ends of the terminal 221 in the first direction to the farthest distance between the opposite ends of the terminal 221 in the second direction to 1/2 to 5/1, the length of the terminal 221 in the first direction increases and the length of the terminal 221 in the second direction decreases correspondingly under a condition that the contact area between the terminal 221 and the land 111 is constant. Accordingly, in the second direction, the length of the pad 111 in the first direction increases, and the length of the non-display region 130 also decreases accordingly. Therefore, in the second direction, the bezel of the screen body 100 may be further narrowed to achieve the effect of a narrow bezel. In the first direction, the non-display region 130 may have more regions not occupied by elements, and thus, in order to ensure a certain contact area between the terminal 221 and the pad 111, the length of the pad 111 in the first direction may be increased. In the first direction, an increase in the area occupied by the terminal 221 increases the width of the base 210, and thus increases the degree of expansion deformation of the base 210 at the time of crimping. However, since the gap 230 is provided between two adjacent terminals 221, the expansion deformation of the substrate 210 can be effectively eliminated.

In one embodiment, a ratio of a farthest distance between opposite ends of the terminal 221 in the first direction to a farthest distance between opposite ends of the terminal 221 in the second direction may be 2/3 to 2/1. In one embodiment, a ratio of a farthest distance between opposite ends of the terminal 221 in the first direction to a farthest distance between opposite ends of the terminal 221 in the second direction is 1. The terminals 221 may be square or circular in shape. Accordingly, the pad 111 may also be square or circular in shape.

In one embodiment, the terminals 221 have a rectangular structure, that is, the orthogonal projection of the terminals 221 on the substrate 210 is rectangular. The rectangular structure is easy to manufacture and simple in structure.

In one embodiment, the length of the substrate 210 may be 10 cm to 15 cm. 200 terminals 221 to 300 terminals 221 may be provided per the second bonding region 220. The distance between two adjacent second binding regions 220 may be 3 cm to 5 cm. Correspondingly, 200 pads 111 to 300 pads 111 may be disposed in each first bonding region 110. The distance between two adjacent first binding regions 110 may be 3 cm to 5 cm.

In one embodiment, a distance between two adjacent second bonding regions 220 may be a distance between two terminals 221 located near each other in the two adjacent second bonding regions 220. The distance between two adjacent first bonding regions 110 may be a distance between two pads 111 on the side where the two adjacent first bonding regions 110 are close to each other.

In one embodiment, the length of the terminal 221 in the first direction may be 70 micrometers. The length of the terminal 221 in the second direction may be 70 micrometers. The distance between two adjacent terminals 221 may be 10 micrometers.

Referring to fig. 3, in one embodiment, the terminals 221 have a triangular structure. That is, the orthogonal projection of the terminal 221 on the substrate 210 is triangular. Under the condition of ensuring a certain area, the triangular structure is more flexibly arranged, and the space of the non-display area 130 can be saved.

In one embodiment, the triangular structure includes a base extending in the same direction as the first direction. The bottom edges of two adjacent triangular structures respectively face to two ends opposite to the second direction. The projections of the bases of two adjacent triangular structures in the second direction have an overlapping part.

After the driving unit 200 is bound to the panel 100, each of the triangular structures may have a base parallel to the first direction. The bottom edges of two adjacent triangular structures are respectively located at two opposite ends in the second direction, that is, the bottom edges of two adjacent triangular structures are not located on the same straight line, but are arranged in parallel. Two adjacent triangular structures are in an inverted state. Therefore, the triangular structures are roughly in a tooth staggered arrangement form on the plane, so that the occupied area of the terminal 221 can be effectively reduced, the space is saved, and the frame of the screen body 100 is narrowed conveniently.

In one embodiment, the triangular structure is an equilateral triangle, so the arrangement is more regular and beautiful, and the design and the manufacture are convenient.

In one embodiment, the plurality of second bonding regions 220 and the gap 230 are located at the same end of the substrate 210. The notch 230 penetrates the substrate 210 and extends to the edge of the substrate 210 along the second direction. Specifically, in the second direction, one end of the notch 230 is located at the edge of the substrate 210, and the other end of the notch 230 may be located in the middle of the substrate 210 or other positions, and the length of the notch 230 may be adjusted according to the expansion characteristics of the material of the substrate 210 and the size of the terminal. The cross-sectional area of the notch 230 increases in steps from the middle of the substrate 210 to the edge of the substrate 210. The notches 230 may have a strip-like structure.

The gap 230 may be opened at one end of the substrate 210, and the second bonding region 220 and the gap 230 are disposed at the same end of the substrate 210, that is, the second bonding region 220 may also extend to the edge of the substrate 210. The notch 230 may be opened at the edge of the substrate 210. The gap 230 is disposed between two of the second binding regions 220. The second binding region 220 is directly crimped when the first binding region 110 and the second binding region 220 are crimped. The area in which the second bonded region 220 is located is expanded to the greatest extent. That is, the degree of expansion deformation of the substrate 210 is greater as the substrate 210 is closer to the edge of the substrate 210 where the second bonding region 220 is disposed. The direction from the bottom of the notch 230 to the opening of the notch 230 is also the second direction. From the bottom of the notch 230 to the opening of the notch 230, the cross-sectional area of the notch 230 is gradually increased, so that different deformation degrees of different positions of the substrate 210 can be effectively coped with, and the terminal 221 and the pad 111 are prevented from being dislocated.

In one embodiment, the bottom of the notch 230 is an arc-shaped structure. That is, the projection of the notch 230 on the substrate 210 is an arc. The arc-shaped structure is not easy to generate stress concentration, and the substrate 210 is prevented from cracking due to the notch 230.

In one embodiment, the non-display area 130 of the screen body 100 is provided with a first flag 112. The substrate 210 of the driving unit 200 is provided with a second mark 222. The first flag bit 112 and the second flag bit 222 may be used as flags for the alignment of the pad 111 and the terminal 221.

In one embodiment, the first marker bit 112 and the second marker bit 222 may be cross markers, respectively. In one embodiment, two first flag bits 112 are respectively disposed at two sides of the first binding regions 110. The number of the second flag bits 222 is two, and the two second flag bits are respectively disposed on two sides of the plurality of second flag bits 222.

The embodiment of the application also provides a display device. The display device comprises the display module 10. The display module 10 includes the driving unit 200 and the panel 100. The panel 100 further includes a polarizer and/or a touch layer set stacked on the display substrate. Specifically, the polarizer and the touch layer group are arranged on the first side of the display substrate in a laminating mode through the bonding layer. It should be noted that the lamination sequence of the polarizer and the touch layer set relative to the display substrate may be determined according to specific situations, and is not limited herein. For example, in some embodiments, the touch layer group 20 and the polarizer may be stacked on the display substrate in sequence through an adhesive layer, but the cover plate should be located at the outermost side of the display panel.

It is understood that the display device in the embodiments of the present application may be any product or component having a display function, such as an OLED display device, a QLED display device, electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a wearable device, and an internet of things device, and the embodiments disclosed in the present application are not limited thereto.

Although exemplary embodiments of a display device and a display device including a screen body have been particularly described herein, many modifications and variations will be apparent to those skilled in the art. It will thus be appreciated that display modules and display devices incorporating the same constructed in accordance with the principles of the present invention may be implemented other than as specifically described herein. The application is also defined in the claims and their equivalents.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A display module, comprising:

a screen body (100) including a non-display area (130), the non-display area (130) including a plurality of first bonding areas (110) arranged at intervals along a first direction;

the driving unit (200) comprises a substrate (210), the substrate (210) comprises a plurality of second binding regions (220) which are arranged at intervals, the first binding regions (110) and the second binding regions (220) are arranged in a one-to-one correspondence manner, a gap (230) is formed between at least two adjacent second binding regions (220), and the driving unit (200) is bound on the screen body (100) through the plurality of first binding regions (110) and the plurality of second binding regions (220).

2. The display module according to claim 1, wherein each of the second binding regions (220) is provided with a plurality of terminals (221) at intervals along the first direction, a ratio of a farthest distance between opposite ends of each of the terminals (221) in the first direction to a farthest distance between opposite ends of each of the terminals (221) in a second direction is 1/2 to 5/1, and the first direction and the second direction intersect.

3. The display module of claim 2, wherein the terminals (221) are rectangular in configuration.

4. The display module of claim 2, wherein the terminals (221) are triangular in configuration.

5. The display module according to claim 4, wherein the triangular structures include bases extending in the same direction as the first direction, the bases of two adjacent triangular structures are located at two opposite ends of the second direction, and projections of the bases of two adjacent triangular structures in the second direction have an overlapping portion.

6. The display module of claim 5, wherein the triangular structure is an equilateral triangle.

7. The display module of claim 2, wherein a ratio of a farthest distance between opposite ends of the terminals (221) in the first direction to a farthest distance between the terminals (221) in the second direction is 1.

8. The display module of claim 2, wherein the plurality of second bonding regions (220) and the notches (230) are located at a same end of the substrate (210), the notches (230) extend through the substrate (210) in a thickness direction of the substrate (210) and extend to an edge of the substrate (210) in the second direction, and a cross-sectional area of the notches (230) increases stepwise from a middle of the substrate (210) to the edge of the substrate (210).

9. The display module of claim 8, wherein the bottom of the notch (230) is an arc-shaped structure.

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