COB bare chip flip transparent display screen

Abstract

The utility model discloses a COB bare crystal inverted transparent display screen, and relates to the technical field of LED display screen equipment. The LED display screen comprises a display screen outer frame and transparent lamp panels, a conductive fixing base is arranged in the middle of the display screen outer frame, the transparent lamp panels are symmetrically arranged on the two sides of the conductive fixing base, a plurality of lamp holes arranged in a matrix mode are formed in the transparent lamp panels, LED lamp beads are packaged in the lamp holes through the COB flip-chip technology, and printed circuits are arranged on the back faces of the transparent lamp panels. The printed circuit and the LED lamp beads are welded in an electrical performance conduction mode before packaging, a plurality of semicircular ventilation holes are formed in the upper end and the lower end of the transparent lamp panel 2, the transparent lamp panel serves as a lamp bead carrier, the lamp beads are packaged through the COB bare crystal inversion technology, the display angle is wider, damage is not prone to occurring, the ventilation holes are formed in the upper end and the lower end of the lamp panel, and the display effect is better. Ventilation and heat dissipation can be achieved, and the transparent display effect is further improved.

Description

Technical Field

[0001] This utility model relates to a COB bare-chip flip transparent display screen, and belongs to the field of LED display equipment technology. Background Technology

[0002] LED displays are the primary display devices in indoor or semi-outdoor display applications. With the diversification of display scenarios, the overall requirements for displays are also increasing, such as lightweight displays and wide-angle display effects. In order to better match the usage scenarios, transparent screens are also emerging.

[0003] Existing LED transparent displays mainly use SMD or DIP display packaging technology, soldering LED beads onto a driver circuit board for display. The overall process is relatively cumbersome, and the LED beads are easily damaged. Therefore, existing technologies also use COB packaging technology to manufacture transparent displays. For example, patent technology with announcement number CN212010183U discloses a highly protective, breathable, and light-transmitting COB integrated display panel, including a printed circuit board. The front of the printed circuit board is provided with 2 to 100,000 LED beads. Each LED bead includes one or more LED chips pasted on the printed circuit board and a light-transmitting adhesive curing glue covering the LED chip. The back of the printed circuit board is provided with a driver circuit and driver devices. The driver devices are electrically connected to the LED beads through vias. The printed circuit board between the LED beads is provided with cutout holes. This COB integrated display panel has good heat dissipation, a wide viewing angle, is waterproof and dustproof, has good stability, strong protection performance, and low manufacturing cost. It can be used both indoors and outdoors. However, the transparency effect of this solution is achieved by using a whole hollow strip, which results in excessively large gaps between the LED beads, affecting the display effect. Utility Model Content

[0004] The purpose of this utility model is to address the defects or deficiencies in the existing technology by providing a COB bare die flip-chip transparent display screen. By setting a transparent lamp board as the carrier of the lamp beads and using COB bare die flip-chip technology to encapsulate the lamp beads, the display angle is wider and the screen is not easily damaged. Ventilation holes are set at the top and bottom ends of the lamp board, which not only allows for ventilation and heat dissipation but also further improves the transparent display effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: it includes a display screen frame 1 and a transparent light panel 2. A conductive fixing seat 11 is provided in the middle of the display screen frame 1. The transparent light panel 2 is symmetrically arranged on both sides of the conductive fixing seat 11. The transparent light panel 2 is provided with a plurality of matrix-arranged lamp holes 25. LED beads are encapsulated in the lamp holes 25 by COB flip chip process. A printed circuit is provided on the back of the transparent light panel 2. The printed circuit and the LED beads are electrically connected and soldered before encapsulation. A plurality of semi-circular ventilation holes 26 are provided at the upper and lower ends of the transparent light panel 2.

[0006] Furthermore, the transparent light panel 2 includes a light panel body 21, a circuit connection plate 22, a middle fixing plate 23, and a side fixing plate 24. The circuit connection plate 22 is fixed on the conductive fixing base 11, and the side fixing plate 24 is fixed on the two side frames of the outer frame 1 of the display screen.

[0007] Furthermore, the circuit connection plate 22, the middle fixing plate 23, and the side fixing plate 24 are all provided with a number of fixing holes 27.

[0008] Furthermore, the outer frame 1 of the display screen is provided with fixing rods 12, which are symmetrically arranged on both sides of the conductive fixing base 11 and correspond to the middle fixing plate 23.

[0009] Furthermore, a connector pin header 28 is provided in the center of the back side of the circuit connection board 22.

[0010] Furthermore, the conductive fixing base 11 is provided with a pin slot 16 corresponding to the connecting pin 28.

[0011] Furthermore, a handle 13 is provided on the top of the back of the display screen frame 1, and several fixed handles 14 and limiting blocks 15 are also provided on the back of the display screen frame 1, with the fixed handles and limiting blocks 15 arranged opposite to each other.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are as follows: by setting a transparent lamp board as the carrier of the lamp beads and using COB bare die flip-chip technology to encapsulate the lamp beads, the display angle is wider and they are not easily damaged. Ventilation holes are set at the top and bottom ends of the lamp board, which can not only ventilate and dissipate heat, but also further improve the transparent display effect. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 1 Second angle view;

[0016] Figure 3 This is a schematic diagram of the front structure of the transparent light panel 2 in this utility model;

[0017] Figure 4 yes Figure 3The back view;

[0018] Figure 5 This is a diagram showing the position of the pin header slot 16 in this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Display screen outer frame; 2. Transparent light panel; 11. Conductive mounting base; 12. Fixing rod; 13. Handle; 14. Fixing handle; 15. Limiting block; 16. Pin header slot; 21. Light panel body; 22. Circuit connection plate; 23. Middle fixing plate; 24. Side fixing plate; 25. Light hole; 26. Ventilation hole; 27. Fixing hole; 28. Connecting pin header. Detailed Implementation

[0020] See Figures 1-5 As shown, the technical solution adopted in this specific embodiment is as follows: It includes a display screen outer frame 1 and a transparent light panel 2. A conductive fixing seat 11 is provided in the middle of the display screen outer frame 1, and the transparent light panel 2 is symmetrically arranged on both sides of the conductive fixing seat 11. The transparent light panel 2 is provided with a plurality of matrix-arranged lamp holes 25. LED lamp beads are encapsulated in the lamp holes 25 by COB flip chip process. A printed circuit is provided on the back of the transparent light panel 2. The printed circuit and the LED lamp beads are electrically conductively soldered before encapsulation. In this embodiment, the COB flip chip process is used to encapsulate the LED lamp beads in the lamp holes of the transparent light panel, which saves the cumbersome surface mount process. The chip and solder wire of each LED lamp bead are tightly covered by epoxy resin colloid, which can effectively prevent the LED lamp beads from being damaged, thereby extending the service life of the LED lamp beads. At the same time, the copper foil block provided on the transparent light panel can conduct the heat of the lamp core in time, improve the heat dissipation efficiency, and ensure the long-term stable operation of the screen.

[0021] In this embodiment, several transparent light panels are set inside the outer frame of the display screen to form a display screen unit, which facilitates the transportation and assembly of several display screen units. A conductive fixing seat is set in the middle of the outer frame of the display screen to provide power and signal output control for the transparent light panels, making it more convenient for the control center to uniformly control each display screen unit.

[0022] More specifically, the transparent light panel 2 is provided with a number of semi-circular ventilation holes 26 at its upper and lower ends. In this embodiment, every two transparent light panels are arranged in a row, and multiple rows of transparent light panels are arranged side by side. The ventilation holes between the upper and lower transparent light panels are arranged in a circular shape. The circular ventilation holes facilitate air circulation, thereby better heat dissipation. At the same time, the circular ventilation holes can further improve the transparent display effect.

[0023] More specifically, the transparent light panel 2 includes a light panel body 21, a circuit connection plate 22, a central fixing plate 23, and a side fixing plate 24. The light holes are set on the light panel body, and a printed circuit is set on the back of the light panel body. The circuit connection plate 22 is fixed to the conductive fixing base 11, and the side fixing plate 24 is fixed to the two side frames of the display screen outer frame 1. The circuit connection plate 22, the central fixing plate 23, and the side fixing plate 24 are all provided with a number of fixing holes 27. The display screen outer frame 1 is provided with fixing rods 12, which are symmetrically arranged on both sides of the conductive fixing base 11 and correspond to the central fixing plate 23. The transparent light panel is fixed to the display screen outer frame by screws passing through the fixing holes. The three fixing points can effectively improve the fixing effect and increase the overall stability of the display screen.

[0024] More specifically, the circuit connection board 22 has a connecting pin 28 in the middle of its back side, and the conductive mounting base 11 has a pin slot 16 corresponding to the connecting pin 28. By setting a printed circuit on the back side of the lamp board body, the connecting pin is electrically connected to the printed circuit. The connection between the conductive mounting base and the transparent lamp board is completed through the connection between the pin slot and the connecting pin, so that the control center can perform signal control on each transparent lamp board.

[0025] More specifically, a handle 13 is provided on the top of the back of the display screen frame 1, which facilitates the movement of the display screen. Several fixed handles 14 and limiting blocks 15 are also provided on the back of the display screen frame 1. The fixed handles and limiting blocks 15 are arranged opposite to each other. The fixed handles drive the torsion spring structure, which can automatically press the transparent light panel, while the limiting blocks directly limit the transparent light panel. The double limiting and fixing increases the stability of the transparent light panel installation and reduces the risk of falling off.

[0026] The working principle of this utility model is as follows: The outer frame 1 of the display screen provides power, signal transmission and control to the transparent light panel 2 through the conductive fixing seat 22. Several LED beads are arranged in a matrix on the transparent light panel 2. The conductivity and signal control of the entire transparent light panel 2 are achieved through the connection of the connecting pin 28 and the pin slot 16. All LED beads are electrically connected to the printed circuit on the back of the transparent light panel 2. The printed circuit is concentrated at the connecting pin 28. The LED bead driver chip is packaged together with the bead. After the bead is packaged, it forms a protruding semi-circular dot. The bead will not be damaged during transportation or use. Moreover, since it is a shallow spherical light source, the viewing angle is greater than 175 degrees, and the overall viewing angle is wider. When the display screen is working, the background can be displayed through the gaps between the LED beads, achieving a transparent display effect. Since ventilation holes 26 are set at the top and bottom ends of the transparent light panel 2, when two transparent light panels 2 are joined together, the semi-circular ventilation holes 26 are joined to form a circular hole, which can be used for ventilation and heat dissipation, while also achieving a transparent display effect.

[0027] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A COB bare-chip flip-chip transparent display, characterized in that: It includes a display screen frame (1) and a transparent light panel (2). A conductive fixing seat (11) is provided in the middle of the display screen frame (1). The transparent light panel (2) is symmetrically arranged on both sides of the conductive fixing seat (11). The transparent light panel (2) is provided with a number of matrix-arranged lamp holes (25). LED beads are packaged in the lamp holes (25) by COB flip chip process. A printed circuit is provided on the back of the transparent light panel (2). The printed circuit and the LED beads are electrically connected and soldered before packaging. A number of semi-circular ventilation holes (26) are provided at the top and bottom ends of the transparent light panel (2).

2. The COB bare-chip flip-chip transparent display screen according to claim 1, characterized in that: The transparent light panel (2) includes a light panel body (21), a circuit connection plate (22), a middle fixing plate (23), and a side fixing plate (24). The circuit connection plate (22) is fixed on the conductive fixing base (11), and the side fixing plate (24) is fixed on the two side frames of the outer frame (1) of the display screen.

3. A COB bare-chip flip-chip transparent display screen according to claim 2, characterized in that: The circuit connection plate (22), the middle fixing plate (23), and the side fixing plate (24) are all provided with a number of fixing holes (27).

4. A COB bare-chip flip-chip transparent display screen according to claim 1, characterized in that: The outer frame (1) of the display screen is provided with a fixing rod (12), which is symmetrically arranged on both sides of the conductive fixing base (11) and corresponds to the middle fixing plate (23).

5. A COB bare-chip flip-chip transparent display screen according to claim 2, characterized in that: The circuit connection board (22) has a connection pin header (28) in the middle of its back side.

6. A COB bare-chip flip-chip transparent display screen according to claim 1, characterized in that: The conductive fixing base (11) is provided with a pin slot (16) corresponding to the connecting pin (28).

7. A COB bare-chip flip-chip transparent display screen according to claim 1, characterized in that: The display screen frame (1) is provided with a handle (13) on the top of the back side. The display screen frame (1) is also provided with several fixed handles (14) and limiting blocks (15) on the back side. The fixed handles and limiting blocks (15) are arranged opposite to each other.

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