LED display screen

Abstract

The utility model discloses a light-emitting diode (LED) display screen which comprises an LED display panel, a first transparent panel and a second transparent panel, the first transparent panel and the second transparent panel are arranged on two faces of the LED display panel through optical adhesive films, and a plurality of hollow portions are evenly distributed on the LED display panel. The outer surface of the first transparent plate is provided with a one-way perspective layer with the reflective side back to the first transparent plate. According to the utility model, the one-way perspective of the LED display screen is realized, the normal display function of the LED display screen is ensured, and the LED display screen can be suitable for one-way perspective application occasions.

Description

Technical Field

[0001] This utility model relates to the field of LED display technology, and in particular to an LED display screen. Background Technology

[0002] A common transparent LED display screen includes a perforated LED light panel and two transparent plates / films attached to the front and back of the LED light panel using optical adhesive. While this type of transparent LED display screen has the advantage of high light transmittance, the high light transmittance also allows people to directly observe the scene behind the LED display screen, making it unsuitable for some occasions that require one-way visibility.

[0003] Therefore, it is necessary to improve the structure of existing LED displays. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an LED display screen that can be viewed from one direction, which not only ensures the normal display function of the LED display screen, but also makes the LED display screen suitable for applications with one-way perspective.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an LED display screen, which includes an LED display panel and a first transparent plate and a second transparent plate disposed on both sides of the LED display panel through an optical film. The LED display panel has a plurality of hollowed-out parts evenly distributed thereon. The outer surface of the first transparent plate is provided with a one-way transparent layer with a reflective side facing away from the first transparent plate.

[0006] Furthermore, the first transparent plate is disposed on the front side of the LED display panel through a first optical adhesive film, and the second transparent plate is disposed on the back side of the LED display panel through a second optical adhesive film.

[0007] Furthermore, the LED display panel includes a substrate, a conductive line formed on the substrate, and a plurality of LED beads soldered to the conductive line. The substrate includes a plurality of horizontally arranged horizontal strips and a plurality of vertically arranged vertical strips. The horizontal strips between two adjacent vertical strips have a structure in which the width gradually narrows from the middle to both ends. The vertical strips between two adjacent horizontal strips also have a structure in which the width gradually narrows from the middle to both ends.

[0008] Furthermore, the LED display screen also includes a plurality of LED driver chips soldered to the conductive lines, wherein the LED beads are disposed at the junction of the horizontal and vertical strips, and the LED driver chips are disposed at the middle of the horizontal strip segment or the middle of the vertical strip segment.

[0009] Furthermore, the first transparent plate is a glass plate, a PC transparent plate, or a PET film, and the second transparent plate is a glass plate, a PC transparent plate, or a PET film.

[0010] Furthermore, the optical film is an EVA film or a PVB film.

[0011] Furthermore, the LED display panel is sandwiched between the first transparent plate and the second transparent plate with its luminescent surface facing the first transparent plate.

[0012] Furthermore, the LED display panel is sandwiched between the first transparent plate and the second transparent plate with its luminescent surface facing the second transparent plate.

[0013] The beneficial technical effects of this utility model are as follows: The disclosed LED display screen includes an LED display panel and a first transparent plate and a second transparent plate respectively attached to both sides of the LED display panel by optical adhesive film. The LED display panel has multiple hollowed-out portions, and the outer surface of the first transparent plate has a one-way transparent layer with its reflective side facing away from the first transparent plate, thus making the first transparent plate a one-way light-transmitting plate. This achieves one-way transparency of the LED display screen, ensuring its normal display function and making it suitable for one-way transparent applications. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of an LED display screen.

[0015] Figure 2 This is a cross-sectional structural diagram of an LED display screen.

[0016] Figure 3 This is a structural diagram of an LED display panel.

[0017] Figure 4 This is a cross-sectional structural schematic diagram of an LED display screen according to another embodiment. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] The LED display screen disclosed in this utility model includes an LED display panel and a first transparent plate and a second transparent plate respectively attached to both sides of the LED display panel by optical adhesive film. The LED display panel has multiple cutouts, and the outer surface of the first transparent plate has a one-way transparent layer with its reflective side facing away from the first transparent plate (i.e., the reflective side of the one-way transparent layer faces outwards), thus making the first transparent plate a one-way light-transmitting plate. This achieves one-way transparency of the LED display screen, ensuring its normal display function and making it suitable for one-way transparent applications.

[0020] refer to Figures 1 to 3 In some embodiments, the LED display screen includes an LED display panel 10, a first transparent plate 30 disposed on the front side of the LED display panel 10 through a first optical film 20, and a second transparent plate 50 disposed on the back side of the LED display panel 10 through a second optical film 40. The LED display panel 10 is a grid-line LED display panel with a plurality of uniformly distributed cutouts 100. The outer surface of the first transparent plate 30 has a one-way transparent layer 60 with its reflective side facing away from the first transparent plate 30. Thus, when the LED display screen is not in operation, it exhibits a mirror effect when viewed from the front and a transparent effect when viewed from the back.

[0021] The LED display panel 10 can be an existing LED display panel with cutouts. In the embodiment shown in the figure, the LED display panel includes a substrate 11, a conductive line formed on the substrate 11 (not shown in the figure), and a plurality of LED beads 12 soldered to the conductive line, and a plurality of cutouts 100 are uniformly distributed on the substrate 11.

[0022] The substrate 11 can be made of phenolic paper substrate, metal substrate, glass fiber substrate, composite substrate (e.g., CEM-3), etc., and hollow portions 100 are formed on the LED substrate 11 by suitable processing methods such as drilling or laser drilling. The conductive lines are disposed in the non-hollow areas of the substrate 11. They can be formed by printing conductive pastes such as silver paste, solder paste, or copper paste onto the non-hollow areas of the substrate 11, or by cutting copper foil and placing it on the non-hollow areas of the substrate 11, or by directly etching copper foil onto the substrate 11. The LED bead 12 can be a surface-mount LED, and the LED bead 12 can be soldered to the conductive lines by existing soldering methods such as reflow soldering. In some embodiments, the LED driver chip 13 can also be soldered and fixed to the conductive lines at the same time. The arrangement of the conductive lines and their connection with the LED bead 12 and the LED driver chip 13 can be carried out using existing technology, and will not be described in detail here.

[0023] Referring to the accompanying drawings, in this embodiment, the substrate 11 includes a plurality of horizontally arranged horizontal strips 110 and a plurality of vertically arranged vertical strips 111. The horizontal strip segments 1100 between adjacent vertical strips 111 are designed with a width that gradually tapers from the middle to both ends. Similarly, the vertical strip segments 1110 between adjacent horizontal strips 110 are designed with a width that gradually tapers from the middle to both ends. This increases the area of ​​the cutout portion 100, thereby enabling the fabricated LED display screen to have higher transparency.

[0024] In the embodiment shown in the accompanying drawings, the LED bead 12 is disposed at the junction of the horizontal strip 110 and the vertical strip 111, while the LED driver chip 13 is disposed in the middle of the horizontal strip segment 1100 of the horizontal strip 110. Admittedly, in other embodiments, the LED driver chip 13 may also be disposed in the middle of the vertical strip segment 1110 of the vertical strip 111.

[0025] exist Figures 1 to 3 In the illustrated embodiment, the LED display panel 10 is sandwiched between the first transparent plate 30 and the second transparent plate 50 with its luminescent surface facing the first transparent plate 30. In other embodiments, such as Figure 4 As shown, the LED display panel 10 is sandwiched between the first transparent plate 30 and the second transparent plate 50 with its light-emitting surface facing the second transparent plate 50. Thus, when the LED display is not in operation, it presents a transparent effect when viewed from the front and a mirror effect when viewed from the back, thereby meeting different usage needs.

[0026] In the embodiment shown in the accompanying drawings, the first transparent plate 30, the LED display panel 10, and the second transparent plate 50 are bonded together using first / second optical adhesive films 20 and 40 on both sides of the LED display panel 10. Admittedly, in other embodiments, the first transparent plate 30, the LED display panel 10, and the second transparent plate 50 may be bonded together using optical adhesive films only on one side of the LED display panel 10.

[0027] Optical films can be selected from, but are not limited to, ethylene-vinyl acetate copolymer (EVA) films, polyvinyl butyral (PVB) films, and other existing transparent non-conductive optical adhesives available on the commercial market.

[0028] The first transparent plate 30 and the second transparent plate 50 can be made of transparent substrates such as glass, PC transparent plate, and PET film, but are not limited to these. For example, in some embodiments, ultra-white tempered glass plates with a thickness of 3mm to 6mm are selected as the first transparent plate 30 and the second transparent plate 50 for manufacturing the LED display screen; while in other embodiments, PET film can be selected as the first transparent plate 30 and the second transparent plate 50, so that the manufactured LED display screen has a certain degree of flexibility.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Those skilled in the art can make various equivalent changes and improvements based on the above embodiments. All equivalent changes or modifications made within the scope of the claims should fall within the protection scope of the present utility model.

Claims

1. An LED display screen, characterized in that: The LED display screen includes an LED display panel and a first transparent plate and a second transparent plate disposed on both sides of the LED display panel through an optical film. Multiple hollow parts are evenly distributed on the LED display panel, and a one-way transparent layer with a reflective side facing away from the first transparent plate is provided on the outer surface of the first transparent plate.

2. The LED display screen as described in claim 1, characterized in that: The first transparent plate is disposed on the front side of the LED display panel through a first optical adhesive film, and the second transparent plate is disposed on the back side of the LED display panel through a second optical adhesive film.

3. The LED display screen as described in claim 1, characterized in that: The LED display panel includes a substrate, a conductive line formed on the substrate, and a plurality of LED beads soldered to the conductive line. The substrate includes a plurality of horizontally arranged horizontal strips and a plurality of vertically arranged vertical strips. The horizontal strips between two adjacent vertical strips have a structure in which the width gradually narrows from the middle to both ends. The vertical strips between two adjacent horizontal strips also have a structure in which the width gradually narrows from the middle to both ends.

4. The LED display screen as described in claim 3, characterized in that: The LED display screen also includes a plurality of LED driver chips soldered to the conductive lines, wherein the LED beads are disposed at the junction of the horizontal and vertical strips, and the LED driver chips are disposed at the middle of the horizontal strip segment or the middle of the vertical strip segment.

5. The LED display screen as described in claim 1, characterized in that: The first transparent plate is a glass plate, a PC transparent plate, or a PET film, and the second transparent plate is a glass plate, a PC transparent plate, or a PET film.

6. The LED display screen as described in claim 1, characterized in that: The optical film is an EVA film or a PVB film.

7. The LED display screen as described in claim 1, characterized in that: The LED display panel is sandwiched between the first transparent plate and the second transparent plate with its luminescent surface facing the first transparent plate.

8. The LED display screen as described in claim 1, characterized in that: The LED display panel is sandwiched between the first and second transparent panels with its luminescent surface facing the second transparent panel.

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