CN211702464U

CN211702464U - LED transparent display screen

Info

Publication number: CN211702464U
Application number: CN201922380096.XU
Authority: CN
Inventors: 陈剑卿; 周佩先
Original assignee: Hunan Chuangjin Technology Co ltd
Current assignee: Hunan Chuangjin Technology Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-10-16
Anticipated expiration: 2029-12-26

Abstract

An LED transparent display screen comprising: a transparent substrate for providing a carrier; the transparent optical laminating adhesive layer is arranged on the upper surface of the transparent substrate; the bonding pad is arranged on the upper surface of the transparent optical laminating adhesive layer, and an LED device is fixed on the bonding pad; the driving control electrode is arranged on the upper surface of the transparent optical laminating adhesive layer, the output end of the driving control electrode is connected with the bonding pad, and the input end of the driving control electrode is used for being connected with the flexible circuit board; the driving power grid is arranged on the upper surface of the transparent optical press-fit adhesive layer and used for connecting the bonding pad and the flexible circuit board; the bonding pad, the drive control electrode and the drive power grid are formed by etching the same metal foil; and the transparent front protective plate is arranged on the LED device and is bonded with the transparent substrate through the transparent non-conductive optical cement. The utility model discloses an adopt the structure of metal forming etching pad, drive control electrode and drive power supply net, very big improvement production efficiency, reduce the cost to effectual resistance that has reduced has improved luminous efficacy.

Description

LED transparent display screen

Technical Field

The utility model belongs to transparent display screen field, concretely relates to LED transparent display screen.

Background

In recent years, the LED display application industry has been steadily developed, and the overall scale has been promoted year by year, and has become an important component in the LED industry chain, and LED display application products represented by LED display screens have been widely used in various fields of society and economy. With the driving of application markets, the LED transparent display screen becomes a hot spot of current research, can enrich visual contents without blocking a sight, and is widely applied to places such as subways, airports, glass trestles, advertising media, chain stores, superstores, enterprise exhibition halls, museums, science and technology museums.

At present, the manufacturing mode of the LED transparent display screen is mainly carried out by coating a transparent conductive coating. However, the transparent display screen manufactured by the method has high cost and large sheet resistance (for example, the sheet resistance of the ITO glass adopted by the LED transparent display screen is about 3 to 5 omega), and the resistance of the formed drive control electrode and the power supply electrode is large, so that the LED device is easy to emit light unevenly, the power consumed on the power supply electrode is far greater than the light emitting power, the integral light emitting efficiency is less than 50 percent, the density of the LED device is small, the distance is difficult to achieve 30mm, and the width of a single LED transparent display screen is less than 1.2 meters.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a LED transparent display screen, LED transparent display screen's simple structure has solved the problem that manufacturing cost is high, resistance is big.

According to the utility model discloses LED transparent display screen, include: a transparent substrate for providing a carrier; the transparent optical laminating adhesive layer is arranged on the upper surface of the transparent substrate; the bonding pad is arranged on the upper surface of the transparent optical laminating adhesive layer, and an LED device is fixed on the bonding pad; the driving control electrode is arranged on the upper surface of the transparent optical laminating adhesive layer, the output end of the driving control electrode is connected with the bonding pad, and the input end of the driving control electrode is used for connecting the flexible circuit board; the driving power grid is arranged on the upper surface of the transparent optical laminating adhesive layer and used for connecting the bonding pad and the flexible circuit board; the bonding pad, the driving control electrode and the driving power grid are formed by etching the same metal foil; and the transparent front protective plate is arranged on the LED device and is bonded with the transparent substrate through transparent non-conductive optical cement.

According to the utility model discloses LED transparent display screen has following technological effect at least: by adopting the structure that the metal foil forms the bonding pad, the driving control electrode and the driving power grid at one time, the production efficiency is greatly improved, and the cost is reduced by about 30 percent. And the metal foil is used as the material of the driving control electrode and the driving power grid, so that the resistance is effectively reduced, the luminous efficiency is improved, and the luminous efficiency can reach more than 80%. In addition, the density of the LED devices can be improved due to the reduction of the resistance, the size of the transparent display screen can be further improved, the distance between the LED devices can be reduced to about 15mm, the size width of the transparent display screen can reach 1.8 meters when a single-side outgoing line mode is used, and the size width of the transparent display screen can reach 3.6 meters when a double-side outgoing line mode is used. Finally, due to the adoption of the metal foil structure, the formed bonding pad is very flat, the efficiency and the quality of subsequent tin paste coating can be ensured, and the production efficiency is further improved.

According to some embodiments of the present invention, the number of the pads, the driving control electrodes, and the LED devices is N; the output ends of the N drive control electrodes are correspondingly connected with the N bonding pads one by one; the input ends of the N drive control electrodes are connected with the flexible circuit board; and an LED device is fixed on each bonding pad.

According to some embodiments of the invention, each drive control electrode has a line width of 0.03mm to 0.1 mm.

According to some embodiments of the invention, the line width of each of the driving power grids is 0.03mm to 0.15 mm; the ratio of the line width of the driving power grid to the grid caliber is 1:10 to 1: 20.

According to some embodiments of the present invention, the flexible printed circuit board is distributed on two sides of the transparent substrate; the N drive control electrodes are connected with the flexible circuit board closest to the drive control electrodes.

According to some embodiments of the invention, the transparent substrate is a flexible substrate.

According to some embodiments of the invention, the LED device employs an RGB three-color LED.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is an enlarged view of a portion A of FIG. 1 (with the transparent front protective plate and LED devices removed);

fig. 4 is a schematic cross-sectional view of an embodiment of the invention.

Reference numerals:

a transparent substrate 100,

A transparent optical laminating adhesive layer 200,

Pad 310, drive control electrode 320, drive power grid 330, LED device 340,

A transparent front protective plate 400,

Transparent non-conductive optical cement 500.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, if there are first, second, third, fourth, etc. described, it is only for the purpose of distinguishing technical features, and it is not understood that relative importance is indicated or implied or that the number of indicated technical features is implicitly indicated or that the precedence of the indicated technical features is implicitly indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.

The following describes an LED transparent display according to an embodiment of the present invention with reference to fig. 1 to 4.

According to the utility model discloses LED transparent display screen, include: the transparent substrate 100, the transparent optical bonding glue layer 200, the bonding pad 310, the driving control electrode 320, the driving power grid 330, and the transparent front protective plate 400. A transparent substrate 100 for providing a carrier; a transparent optical laminating adhesive layer 200 disposed on the upper surface of the transparent substrate 100; a bonding pad 310 disposed on the upper surface of the transparent optical bonding adhesive layer 200, on which an LED device 340 is fixed; the driving control electrode 320 is arranged on the upper surface of the transparent optical laminating adhesive layer 200, the output end of the driving control electrode is connected with the bonding pad 310, and the input end of the driving control electrode is used for connecting a flexible circuit board; the driving power grid 330 is arranged on the upper surface of the transparent optical laminating adhesive layer 200 and used for connecting the bonding pad 310 and the flexible circuit board; the bonding pad 310, the driving control electrode 320 and the driving power grid 330 are formed by etching the same metal foil; the transparent front protective plate 400 is disposed on the LED device 340 and bonded to the transparent substrate 100 through the transparent non-conductive adhesive 500.

Referring to fig. 1 to 4, a transparent optical bonding layer 200 is disposed on the transparent substrate 100 for fixing a metal foil. The pads 310, drive control electrodes 320, and drive power grid 330 are patterned by a uniform metal foil etch. The drive control electrode 320, the drive power grid 330, press the pad 310 and the flexible circuit board together. The LED device 340 is fixed on the bonding pad 310, the LED device 340 is finally connected with the flexible circuit board through the bonding pad 310, the driving control electrode 320 and the driving power grid 330, and the flexible circuit board is connected with the driving control board, so that the control of the LED device 340 is finally realized. The LED device 340 is further provided with a transparent front protection plate 400, and the transparent front protection plate 400 and the transparent substrate 100 are bonded together by a transparent non-conductive adhesive 500 to realize final protection. Meanwhile, the pads 310 are formed by etching metal foil, and the flatness may be high, and when the number of the pads 310 is small, the advantage of the flatness may not be great, but when the number of the pads 310 is large, if the flatness is high, the solder paste may be applied by printing, and then the LED device 340 may be directly heated and cured in batch after being placed on the pads 310. If the conventional method is adopted, since the pads 310 cannot be formed in batch, the dispensing is performed one by one, and the production speed is slow. In addition, the power supply is in the form of the driving power grid 330, which has a greatly reduced resistance compared to the power supply lines, and thus a transparent display screen with a larger size and a higher pixel density can be manufactured. The metal foil is usually copper foil, and when an ultra-low impedance lead is required, silver foil or gold foil may be used, or when other requirements are required, foils made of other metal materials may be used.

According to the utility model discloses a LED transparent display screen, through adopting the structure that metal forming once only formed pad 310, drive control electrode 320, drive power grid 330, very big improvement the efficiency of production, the cost is reduced about 30%. And the metal foil is used as the material of the driving control electrode 320 and the driving power grid 330, so that the resistance is effectively reduced, the luminous efficiency is improved, and the luminous efficiency can reach more than 80%. In addition, the density of the LED devices 340 can be improved due to the reduction of the resistance, the size of the transparent display screen can be further improved, the distance between the LED devices 340 can be reduced to about 15mm, the size width of the transparent display screen can reach 1.8 meters when a single-side line outgoing mode is used, and the size width of the transparent display screen can reach 3.6 meters when a double-side line outgoing mode is used. Finally, because the metal foil structure is adopted, the formed bonding pad 310 is very flat, the efficiency and the quality of subsequent tin paste coating can be ensured, and the production efficiency is further improved.

According to the LED transparent display screen of the present invention, there are N pads 310, N driving control electrodes 320, and N LED devices 340; the output ends of the N driving control electrodes 320 are connected with the N pads 310 in a one-to-one correspondence; the input ends of the N drive control electrodes 320 are connected with the flexible circuit board; an LED device 340 is secured to each pad 310. Referring to fig. 1 to 3, the N LED devices can be individually controlled by the N driving control electrodes. In addition, the driving power grid can be connected with a plurality of bonding pads simultaneously, so that the number of the driving power grids can be smaller than that of the LED devices, and in a theoretical case, the power supply for the N LED devices can be realized by only adopting one driving power grid. When M driving power grids are adopted, the M driving power grids are commonly used for supplying power to the N LED devices. Under the general condition, one row of LED devices only need one drive power supply grid for power supply, and when the double-side outgoing line mode is adopted, one row of LED devices can supply power respectively from left to right through two drive power supply grids, so that the power supply effect is guaranteed, and the sight cannot be shielded.

In some embodiments of the present invention, the line width of each driving control electrode 320 is 0.03mm to 0.1 mm. The light-emitting diode display panel has the advantages that the increase of line resistance and the reduction of light-emitting efficiency caused by over-thinness are avoided, and the display effect is not influenced by over-coarseness.

In some embodiments of the present invention, the line width of each driving power grid 330 is 0.03mm to 0.15 mm; the ratio of the line width of the driving power grid 330 to the grid aperture is 1:10 to 1: 20. The line width within the range does not influence the display effect due to over-thickness, and meanwhile, the resistance value can be effectively reduced on the premise of ensuring that the display effect is not influenced by adopting the ratio of 1:10 to 1: 20.

In some embodiments of the present invention, the flexible circuit boards are distributed on two sides of the transparent substrate 100; the N drive control electrodes 320 are all connected to the closest flexible circuit board. When the size of the transparent LED display screen is large, if a single flexible printed circuit board is continuously used, the size of the single flexible printed circuit board is large, which is costly, and therefore, a combination of a plurality of flexible printed circuit boards is used for connection. Typically, a flex circuit board links in a row of LED devices 340. In addition, when a large transparent display panel is manufactured, a double-sided outgoing line is required facing the driving power grid 330 and the driving control electrode 320. At this time, a plurality of circuit boards are directly connected to both sides, so that the resistances of the driving control electrode 320 and the driving power grid 330 can be effectively reduced, and the light emitting efficiency can be improved.

In some embodiments of the present invention, the transparent substrate 100 is a flexible substrate. The flexible base material can effectively improve the toughness, the improvement of the toughness can increase the purposes of the product, and the resistance of the product to external damage can also be improved. The flexible base material can adopt flexible PET or flexible transparent glass, and can also directly adopt common glass in a scene without considering the use of flexible materials. When a flexible base material is not required, ordinary glass may be used as the transparent substrate 100. In addition, the flexible substrate is used for a curved LED transparent display screen.

In some embodiments of the present invention, the LED device 340 employs RGB three-color LEDs. Adopt RGB three-colour LED, can effectual improvement user experience. In some occasions where colored light is not needed, the single-color LED can be directly used to reduce the use cost.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and those skilled in the art can understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An LED transparent display screen, comprising:

a transparent substrate (100) for providing a carrier;

the transparent optical laminating adhesive layer (200) is arranged on the upper surface of the transparent substrate (100);

the bonding pad (310) is arranged on the upper surface of the transparent optical laminating adhesive layer (200), and an LED device (340) is fixed on the bonding pad;

the driving control electrode (320) is arranged on the upper surface of the transparent optical laminating adhesive layer (200), the output end of the driving control electrode is connected with the bonding pad (310), and the input end of the driving control electrode is used for being connected with a flexible circuit board;

the driving power grid (330) is arranged on the upper surface of the transparent optical laminating adhesive layer (200) and is used for connecting the bonding pad (310) and the flexible circuit board; the bonding pad (310), the driving control electrode (320) and the driving power grid (330) are formed by etching the same metal foil;

and the transparent front protection plate (400) is arranged on the LED device (340) and is bonded with the transparent substrate (100) through a transparent non-conductive optical cement (500).

2. The LED transparent display screen of claim 1, wherein the number of the bonding pads (310), the driving control electrodes (320) and the LED devices (340) is N; the output ends of the N drive control electrodes (320) are correspondingly connected with the N bonding pads (310) one by one; the input ends of the N drive control electrodes (320) are connected with the flexible circuit board; an LED device (340) is fixed on each bonding pad (310).

3. The LED transparent display screen of claim 2, wherein the line width of each drive control electrode (320) is 0.03mm to 0.1 mm.

4. The LED transparent display screen according to claim 2, wherein the line width of each driving power grid (330) is 0.03mm to 0.15 mm; the ratio of the line width of the driving power grid (330) to the grid caliber is 1:10 to 1: 20.

5. The LED transparent display screen according to claim 4, wherein the flexible circuit board is distributed on two sides of the transparent substrate (100); the N drive control electrodes (320) are all connected with the flexible circuit board closest to the drive control electrodes.

6. The LED transparent display screen according to claim 1, wherein the transparent substrate (100) is made of flexible base material.

7. The LED transparent display screen of claim 1, wherein the LED devices (340) are RGB tricolor LEDs.