CN211264852U

CN211264852U - Display back plate, display equipment and splicing display equipment

Info

Publication number: CN211264852U
Application number: CN202020096804.7U
Authority: CN
Inventors: 王英琪; 陈柏辅; 曹江; 刘政明
Original assignee: Chongqing Kangjia Photoelectric Technology Research Institute Co Ltd
Current assignee: Chongqing Kangjia Photoelectric Technology Research Institute Co Ltd
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-08-14
Anticipated expiration: 2030-01-16

Abstract

The utility model provides a display back plate. The display back plate comprises a back plate, a plurality of micro light-emitting diodes, a plug-in circuit board and a plurality of signal wires. The signal wires are electrically connected with the plug circuit board. The back plate comprises a front surface and a back surface opposite to the front surface. The LED light source comprises a light emitting area, a first wiring area, a second wiring area and a third wiring area, wherein the light emitting area is provided with a plurality of micro LEDs and is positioned on the front surface, the first wiring area and the second wiring area are positioned on two opposite sides of the light emitting area, and the third wiring area is positioned on one side of the light emitting area and is positioned between two opposite sides. The plurality of signal wires comprise first signal wires and second signal wires, the first signal wires are wired from the first wiring area and the second wiring area and are electrically connected with the plug-in circuit board through the third wiring area, the second signal wires are wound on the third wiring area from the first wiring area and the second wiring area along the back surface, and are wired from the third wiring area and are electrically connected with the plug-in circuit board. The utility model also provides a display device and concatenation display device.

Description

Display back plate, display equipment and splicing display equipment

Technical Field

The utility model relates to a display technical field especially relates to a show backplate, display device and concatenation display device.

Background

In the prior art, a back plate of an LED display includes a plurality of pixel regions, and each pixel point in the pixel regions includes a red LED, a blue LED, and a green LED. The RGB pixel region is a display region, and both side regions outside the display region are border regions, and since the LED driving is a single current driving for each LED and the number of data lines is as many as thousands, the border region is wide, resulting in a large border of the display.

When the display screen is spliced, the splicing effect is influenced by the boundary of the display, so that the display effect is further influenced.

Disclosure of Invention

In view of the foregoing, there is a need for a display backplane, a display device and a tiled display device, which can reduce the boundary of the display device, so that the display effect of the display device is better.

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

in a first aspect, the present invention provides a display backplane. The display back plate comprises a back plate, a plurality of miniature light emitting diodes which are arranged on the back plate in a matrix manner, a plug-in circuit board positioned at one end of the back plate, and a plurality of signal wires which are electrically connected with the miniature light emitting diodes in a one-to-one correspondence manner, wherein the signal wires are electrically connected with the plug-in circuit board, and the back plate comprises a front surface and a back surface which is back to the front surface; the light emitting area is provided with the micro light emitting diodes and is positioned on the front surface; the first wiring area and the second wiring area are positioned on two opposite sides of the light emitting area, and the third wiring area is positioned on one side of the light emitting area and between the two opposite sides, and the third wiring area is positioned between the first wiring area and the second wiring area; the plurality of signal lines comprise first signal lines and second signal lines, the first signal lines are routed from the first routing area and the second routing area and electrically connected with the plug-in circuit board through the third routing area, the second signal lines are routed from the first routing area and the second routing area along the back surface of the third routing area, and are routed from the third routing area and electrically connected with the plug-in circuit board.

In a second aspect, the present invention provides a display device, the display device includes a housing and a display back plate disposed in the housing.

A third aspect, the utility model provides a tiled display device, tiled display device include the casing and set up in a plurality of above-mentioned display backplates in the casing, a plurality of display backplates splice together.

According to the display back plate, the display device and the splicing display device, the first signal wire is wired from the first wiring area and the second wiring area and is electrically connected with the splicing circuit board, and the second signal wire is wound on the third wiring area from the first wiring area and the second wiring area along the back surface.

Drawings

The above features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:

fig. 1 is a schematic view of a display backplane according to a first embodiment of the present invention.

Fig. 2 is a schematic diagram of a display back plate according to a second embodiment of the present invention.

Fig. 3 is a schematic diagram of a display backplane according to a third embodiment of the present invention.

Fig. 4 is a schematic diagram of a display back plate according to a fourth embodiment of the present invention.

Fig. 5 is a schematic diagram of a display back plate according to a fifth embodiment of the present invention.

Fig. 6 is a schematic view of a display back plate according to a sixth embodiment of the present invention.

Fig. 7 is a schematic view of a display device using the display back plate according to a first embodiment of the present invention.

Fig. 8 is a schematic view of a tiled display device applied to a display device according to a first embodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

In order to make the content of the present invention clearer and more accurate, the present invention will now be described in detail with reference to the accompanying drawings. Description of drawings the accompanying drawings illustrate examples of embodiments of the present invention, in which like reference numerals refer to like elements. It is to be understood that the drawings are not to scale as the actual practice of the invention, but are for illustrative purposes and are not drawn to scale.

Please refer to fig. 1, which is a schematic view of a display back plate 6 according to a first embodiment. The display back plate 6 includes a back plate 1, a plurality of micro light emitting diodes 111 disposed on the back plate 1, a plug circuit board 2 located at one end of the back plate 1, and a plurality of signal lines 3 electrically connected with the micro light emitting diodes 111 in a one-to-one correspondence manner. The back sheet 1 includes a front surface 88 and a back surface (not shown) opposite the front surface 88. The front surface 88 includes a light emitting region 11 for mounting a plurality of light emitting diodes, regions on two opposite sides of the light emitting region 11 are a first wiring region 12 and a second wiring region 13, respectively, and a region on one side of the light emitting region 11 and between two opposite sides is a third wiring region 14. Wherein the third routing area 14 is located between the first routing area 12 and the second routing area 13.

The micro light emitting diodes 111 are arranged in a matrix. The number of the micro light emitting diodes 111 can be determined according to the size of the micro light emitting diodes 111 and the size of the back plate 1.

For example, assume that the size of a single micro led 111 is 20 micrometers, the distance between two adjacent micro leds 111 is 20 micrometers, the length of the light emitting region 11 of the front surface 88 is 50 centimeters, the width is 32 centimeters, and the area of the light emitting region 11 is 1600 square centimeters. There are 4 million micro leds 111 in light emitting region 11. Each micro light emitting diode 111 is provided with two signal lines 3, and the number of the signal lines 3 is 8 million.

It is to be understood that the above description is intended to be illustrative, and not restrictive.

Optionally, the plug circuit board 2 is located at one end of the third wiring region 14 away from the light emitting region 11, and the plug circuit board 2 is electrically connected to the signal line 3 of the micro light emitting diode 111. The end of the plug circuit board 2 away from the light emitting region 11 is connected with a driving circuit board 100. The driving circuit board 100 is used to control the micro light emitting diodes 111.

Optionally, the plug circuit board 2 is a flexible circuit board for plugging the display backplane 6 and the driving circuit board 100 together.

The signal lines 3 comprise a first signal line 31 and a second signal line 32, and the first signal line 31 is routed from the first routing area 12 and the second routing area 13 and is electrically connected with the plug circuit board 2. The second signal line 32 is disposed around the third wiring region 14 along the back surface from the first wiring region 12 and the second wiring region 13, and is routed from the third wiring region 14 and electrically connected to the plug circuit board 2.

Alternatively, the number of signal lines is set according to actual requirements, and is not particularly limited herein.

Optionally, the areas of the first routing area 12 and the second routing area 13 are the same. For example, it is assumed that the first routing area 12 and the second routing area 13 have a length of 32 cm and a width of 2 cm. The area of the first routing area 12 and the area of the second routing area 13 are both 64 square centimeters.

It is to be understood that the above examples are illustrative only and not limiting.

Optionally, the first wiring area 12 includes a first sub-area 121 and a second sub-area 122, the first sub-area 121 is close to one side of the plug circuit board 2, the second sub-area 122 is far away from one side of the plug circuit board 2, and the first sub-area 121 is connected to the second sub-area 122. The second wiring area 13 includes a third sub-area 131 and a fourth sub-area 132, the third sub-area 131 is close to one side of the plug circuit board 2, the fourth sub-area 132 is far away from one side of the plug circuit board 2, and the third sub-area 131 is connected with the fourth sub-area 132. Specifically, the first signal lines 31 are distributed to the first and

third sub-regions

121 and 131. The second signal line 32 is disposed in the second sub-region 122 and the fourth sub-region 132, and is routed from the second sub-region 122 and the fourth sub-region 132 to the back surface.

The first contact 4 is disposed in each of the second sub-region 122 and the fourth sub-region 132, and the first contact 4 in the second sub-region 122 and the first contact 4 in the fourth sub-region 132 are respectively located on a side away from the light emitting region 11 of the second sub-region 122 and the fourth sub-region 132. The second signal line 32 is routed from the first contact 4 to the back side. The first sub-area 121 and the third sub-area 131 are both provided with a second contact 5, and the second contact 5 is close to one side of the plug circuit board 2. The second signal line 32 is wound around the front surface 88 from the rear side through the second contact 5.

In the present embodiment, the first contact 4 is the adhesive layer 41, the second signal lines 32 in the second sub-region 122 and the fourth sub-region 132 are made into gold fingers, and the gold fingers are connected to the adhesive layer 41. The second signal line 32 is inverted to the back surface by the adhesive layer 41 and attached to the back surface. The end of the second signal line 32, which is away from the second sub-region 122 and the fourth sub-region 132 from the first sub-region 121 and the third sub-region 131, is wound on the front surface 88, and is routed to the third routing region 14 to be electrically connected to the plug circuit board 2. The first signal line 31 is routed to the first sub-area 121 and the third sub-area 131, respectively. The first signal lines 31 of the first sub-area 121 and the third sub-area 131 are routed from the front surface 88 to the third routing area 14, and are electrically connected to the plug circuit board 2.

In this embodiment, the second signal lines 32 of the second sub-area 122 and the fourth sub-area 132 are wound on the back surface, so that the routing of the second sub-area 122 and the fourth sub-area 132 from the front surface 88 is reduced, and the widths of the first routing area 12 and the second routing area 13 can be set to be smaller. Furthermore, the frame of the display back plate can be reduced, so that the display effect is improved.

Alternatively, the gold finger may be, but not limited to, a material with copper as a main component, and in some possible embodiments, the gold finger may also be made of gold plating.

Please refer to fig. 2, which is a display back plate 61 of the second embodiment. The difference between the display backplane 6 of the second embodiment and the display backplane 6 of the first embodiment is that: the first conductive holes 42 of the second subregion 122 and all the signal lines 3 of the fourth subregion 132 correspond one to one. All the signal lines 3 of the second sub-region 122 and the fourth sub-region 132 pass through the second contact 5 and are disposed on the back surface, and the first contacts 4 are the second conductive holes 51 corresponding to the signal lines 3 on the back surface one to one. The signal line 3 on the back surface passes through the front surface 88 through the second conductive hole 51 and is connected to the third wiring area 14, and is electrically connected to the plug circuit board 2. All the signal lines 3 of the first sub-area 121 and the third sub-area 131 are routed only from the front surface 88 to the third routing area 14, and are electrically connected to the plug circuit board 2.

Optionally, the first conductive via 42 and the second conductive via 51 are both filled with a conductive material. The conductive material may be, but is not limited to, a material having a metal as a main component. In some possible embodiments, the conductive material may also be: metal elements, alloys (copper alloys, aluminum alloys, etc.), composite metals, and other conductive materials for special purposes that do not have a main function of conductivity. Commonly used conductive fillers include nickel-coated graphite powder, nickel-coated carbon fiber carbon black, metal powder, metal foils, metal fibers, carbon fibers and the like. The electrical properties of conductive materials are characterized primarily by resistivity. Factors that affect resistivity are temperature, impurity content, cold deformation, heat treatment, etc. The effect of temperature is often expressed as a temperature coefficient of resistivity of the conductive material. In addition to the approach to melting point and ultra-low temperature, the resistivity is linearly dependent on temperature change in a general temperature range.

Optionally, the first conductive via 42 and the second conductive via 51 may be, but are not limited to, conductive vias formed by etching or laser, and the first conductive via 42 and the second conductive via 51 are filled with a conductive material. Such that the front side 88 and the back side are conductively connected through the first conductive via 42 and the second conductive via 51.

Alternatively, the conductive material may be, but is not limited to, a metal-based material, and in some possible embodiments, the conductive material may also be an alloy material, a composite metal material, and a special function conductive material. The electrical properties of conductive materials are characterized primarily by resistivity. Factors that affect resistivity are temperature, impurity content, cold deformation, heat treatment, etc. The effect of temperature is often expressed as a temperature coefficient of resistivity of the conductive material. In addition to the approach to melting point and ultra-low temperature, the resistivity is linearly dependent on temperature change in a general temperature range.

Please refer to fig. 3, which is a schematic diagram of a display back plate according to a third embodiment. The display back plate 6 of the third embodiment differs from that of the first embodiment in that: the second contact 5 is close to one side of the plug circuit board 2. The first contact 4 is arranged in each of the second subregion 122 and the fourth subregion 132, and the first contact 4 in the second subregion 122 is located on the side far from the first subregion 121. The first contact 4 in the fourth subregion 132 is located on the side away from the third subregion 131, and the second signal line 32 is routed from the first contact 4 to the back surface. In this embodiment, the second signal lines 32 in the second sub-area 122 and the fourth sub-area 132 are wound on the back surface from the side far away from the plug circuit board 2, and there is no need to route the signal lines from the first sub-area 121 and the third sub-area 131, so that the widths of the first routing area 12 and the second routing area 13 can be set smaller. Furthermore, the frame of the display back plate can be reduced, so that the display effect is improved.

Please refer to fig. 4, which is a schematic view of a display back plate 63 according to a fourth embodiment. The fourth embodiment shows that the back plate 63 differs from the display back plate 6 of the first embodiment in that: the second signal line 32 in the second sub-region 122 and the fourth sub-region 132 is wound on the back surface, and is wound on the front surface 88 from one end of the first sub-region 121 and the third sub-region 131 far away from the second sub-region 122 and the fourth sub-region 132, and is routed to the third routing region 14 and electrically connected to the plug circuit board 2. The first signal lines 31 in the first sub-region 121 and the third sub-region 131 are routed from the front surface 88 to the third routing region 14, and are electrically connected to the plug circuit board 2.

Optionally, both the first contact 4 and the second contact 5 are provided as an adhesive layer 41.

It should be noted that other structures of the display back plate 63 in the fourth embodiment are the same as those in the first embodiment, and are not described herein again.

Please refer to fig. 5, which is a schematic view of a display back plate 64 of the fifth embodiment. In this embodiment, the difference between the display back plate 64 of the fifth embodiment and the display back plate 63 of the fourth embodiment is that the first contacts 4 are third conductive holes 43 corresponding to the back signal lines 3 one to one, and the third conductive holes 43 and the first conductive holes 42 are the same conductive holes, and other parts are the same as those in the fourth embodiment and are not described herein again.

Please refer to fig. 6, which is a schematic view of a display back plate 65 according to a sixth embodiment. The difference between the display back plate 65 of the sixth embodiment and the display back plate 63 of the fourth embodiment is: the second contacts 5 are fourth conductive holes 52 corresponding to the back signal lines 3 one to one. The fourth conductive via 52 is filled with a conductive material, and the conductive material in the fourth conductive via 52 is identical to the conductive material in the second conductive via 51. The signal line 3 on the back surface passes through the front surface 88 through the fourth conductive hole 52, and is routed to the third routing area 14 and electrically connected to the plug circuit board 2.

It should be noted that other structures of the display back plate 65 in the sixth embodiment are the same as those of the display back plate 63 in the fourth embodiment, and are not described herein again.

Optionally, the first sub-area 121, the second sub-area 122, the third sub-area 131, and the fourth sub-area 132 have the same size, and the number of signal lines arranged in the first sub-area 121, the second sub-area 122, the third sub-area 131, and the fourth sub-area 132 is the same.

In some possible embodiments, the number of signal lines routed in the second and

fourth sub-regions

122 and 132 may be greater relative to the number in the first and

second sub-regions

121 and 122. For example, the number of the second sub-region 122 and the fourth sub-region 132 is equal, and the signal lines of the second sub-region 122 and the fourth sub-region 132 occupy 2/3, 3/4, etc. of all the signal lines, which is not limited herein. In some possible embodiments, the widths of the first and

second sub-regions

121 and 122 are the same, and the widths of the third and

fourth sub-regions

131 and 132 are the same, but smaller than the widths of the first and

second sub-regions

121 and 122. The signal lines laid in the first subregion 121 and the third subregion 131 occupy 2/3, 3/4, and the like of all the signal lines. It is to be understood that the signal lines of each area may be arranged according to practical situations, and are not limited to the above examples.

Please refer to fig. 7, which is a schematic diagram of a display apparatus 7 applying the above display backplane of the first embodiment. The display device 7 includes a display back panel 6 (for example, the display back panel 6 may be a display back panel 61, a display back panel 62, a display back panel 63, a display back panel 64 and/or a display back panel 65) and a housing 61 for fixing the display back panel 6, and it is understood that the display device 7 has a display function. The display device 7 includes, but is not limited to, a display, a television, a computer, a notebook computer, a tablet computer, a wearable device, and the like. Above-mentioned display device 7 is owing to adopted above-mentioned demonstration backplate 6, owing to the line mode of walking in the demonstration backplate 6, improves backplate 1's utilization ratio for first region of walking about 12 and second region of walking about 13 reduce, and further, this display device 7's frame can be made littleer. And the display effect is not influenced.

Please refer to fig. 8, which is a schematic diagram of a tiled display device 8 applying the display device 7 according to the first embodiment. A plurality of display backplates 6 (e.g., display backplates 6 may be display backplates 61, display backplates 62, display backplates 63, display backplates 64, and/or display backplates 65) spliced display device 8. in the utility model discloses a display backplates 6 in spliced display device 8 may be two, three, four, etc., and are not limited herein. The larger the number of display backplanes 6, the larger the display area of the tiled display device 8. The splicing display device 8 adopts the display back plate 6, so that the boundary of the display device 7 can be reduced, and the display effect of the display device 7 is better.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, to the extent that such modifications and variations fall within the scope of the invention and the equivalent techniques thereof, it is intended that the present invention also encompass such modifications and variations.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined by the appended claims.

Claims

1. The utility model provides a display back plate, include the backplate, set up in the backplate just is a plurality of miniature emitting diode of matrix arrangement, is located the grafting circuit board of backplate one end, with a plurality of signal line of a plurality of miniature emitting diode one-to-one electric connection, a plurality of signal line electric connection in grafting circuit board, its characterized in that: the back plate comprises a front surface and a back surface opposite to the front surface; the light emitting area is provided with the micro light emitting diodes and is positioned on the front surface; the first wiring area and the second wiring area are positioned on two opposite sides of the light emitting area, and the third wiring area is positioned on one side of the light emitting area and between the two opposite sides, and the third wiring area is positioned between the first wiring area and the second wiring area; the plurality of signal lines comprise first signal lines and second signal lines, the first signal lines are routed from the first routing area and the second routing area and electrically connected with the plug-in circuit board through the third routing area, the second signal lines are routed from the first routing area and the second routing area along the back surface of the third routing area, and are routed from the third routing area and electrically connected with the plug-in circuit board.

2. The display backplane of claim 1, wherein: the first wiring area is divided into a first sub-area and a second sub-area, the first sub-area is located on one side, close to the plug circuit board, of the first wiring area, and the second sub-area is located on one side, far away from the plug circuit board, of the first wiring area; the second wiring area is divided into a third sub-area and a fourth sub-area, and the third sub-area is positioned on one side, close to the plug circuit board, of the second wiring area; the fourth sub-area is positioned on one side, away from the plug circuit board, of the second wiring area, and the second signal line is arranged in the second sub-area and the fourth sub-area and wound to the back face; the first signal wire is wired from the first sub-area and the third sub-area and is electrically connected with the plug circuit board through the third wiring area.

3. The display backplane of claim 2, wherein: the second sub-area and the fourth sub-area are both provided with first contacts, and the second signal line is transferred from the first contacts to the back surface.

4. The display backplane of claim 3, wherein: the first contact is an adhesive layer which is arranged on one side of the second sub-area and the fourth sub-area, which is far away from the light emitting area, and is used for turning over a signal line, and the second signal line is wound on the front surface from one end of the first sub-area and one end of the third sub-area, which is far away from the second sub-area and the fourth sub-area, and is routed to the third routing area.

5. The display backplane of claim 3, wherein: the first contact is a first conductive hole, conductive materials are filled in the first conductive hole, and the signal wires of the second sub-area and the fourth sub-area penetrate through the back surface through the first contact.

6. A display backplane according to claim 4 or 5, wherein: the first contact is positioned on the first side, far away from the light emitting area, of the second sub-area and the fourth sub-area and close to one edge of the display back plate.

7. A display backplane according to claim 4 or 5, wherein: the first contact is positioned on one side of the second sub-area and the fourth sub-area, which are far away from the first sub-area and the third sub-area respectively, and is close to the other edge of the back plate.

8. The display backplane of claim 2, wherein: and the first sub-area and the third sub-area are both provided with second contacts, and the second signal wire is wound on the front surface from the back surface and is transferred to the third wiring area through the second contacts.

9. A display device, comprising: a housing and a display backplane according to any one of claims 1 to 8 disposed within the housing.

10. A tiled display device, comprising: a housing and a plurality of display backplates as claimed in any one of claims 1 to 8 disposed within the housing, the plurality of display backplates being stitched together.