Transparent display screen with high transparent display effect and preparation method thereof

Abstract

The invention discloses a transparent display screen with a high transparent display effect and a preparation method thereof, and belongs to the technical field of transparent display screens. The transparent display screen with the high-transparency display effect comprises a transparent substrate, a plurality of light-emitting units are arranged on the upper surface of the substrate, circuits connected with the light-emitting units are arranged on the substrate, the light-emitting units are covered with a transparent thin film, and the thin film comprises a structural area corresponding to the circuits and a plane area corresponding to the light-emitting units. And the structural region invisifies the circuit. By the adoption of the transparent display screen with the high transparent display effect and the preparation method of the transparent display screen, the problems that an existing transparent display screen is poor in light transmitting effect and high in cost can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of transparent display screens, and in particular to a transparent display screen with high transparency display effect and a preparation method thereof. Background Art

[0002] LED transparent display screens provide a direction for the development of LED display screen technology and have a wide range of applications in a variety of environments. Most of the existing LED display screen substrates are non-transparent, that is, in the working state, the image displayed on the display screen can only be seen from one side of the display screen; when not in the working state, the scene on the other side of the display screen cannot be seen through the display screen. Therefore, in order to achieve transparent display of the display screen and be able to directly observe the scene on the other side through the display screen when not in the working state, LED transparent display screens have been developed.

[0003] The substrate in the LED transparent display is transparent, so the LED transparent display can achieve a perspective effect while displaying the content, and can be applied to vending machines, glass windows, and car displays. The light transmittance and integrity of the LED transparent display will be affected by the circuit layer. The circuit layer is mainly composed of two layers, and these two layers of circuits form a loop to drive the LED chip to work. The wire is usually a copper-nickel alloy, which will affect the light transmittance of the display and the integrity of the picture in the transparent display, thus affecting the effect of the transparent display. In the current scheme, the main method is to set a light-transmitting area and a non-light-transmitting area on the transparent display to hide the circuit, but the non-light-transmitting area will also affect the light transmittance of the display. Alternatively, a transparent conductive film is used instead of a metal wire, but this technology is not yet mature, and its materials and manufacturing process are expensive, and there is still room for improvement in terms of stability and conductivity. Summary of the invention

[0004] The purpose of the present invention is to provide a transparent display screen with high transparency display effect and a preparation method thereof, so as to solve the problems of poor light transmission effect and high cost of the existing transparent display screen.

[0005] To achieve the above-mentioned purpose, the present invention provides a transparent display screen with a high transparency display effect, comprising a transparent substrate, a plurality of light-emitting units are arranged on the upper surface of the substrate, circuits connected to the light-emitting units are arranged on the substrate, and the light-emitting units are covered with a transparent film, the film comprises a structural area corresponding to the circuit and a plane area corresponding to the light-emitting unit, and the structural area makes the circuit invisible.

[0006] Preferably, the circuit is embedded inside a side of the substrate close to the light-emitting unit, and the circuit includes a trunk line, which is distributed inside the substrate in a longitudinal linear array, and branches are arranged on the trunk line, which are perpendicular to the trunk line and connected to the light-emitting unit.

[0007] Preferably, the light-emitting unit includes an LED light-emitting monomer and a solder pad, the LED light-emitting monomer is fixed to the substrate via the solder pad, the LED light-emitting monomer is distributed in a linear array on the substrate, and the LED light-emitting monomer is connected to the branch via the solder pad.

[0008] Preferably, the structural area includes a plurality of parallel lenses arranged on the upper surface of the film, the lenses are parallel to the circuits, the lenses are located outside the light-emitting angle of the light-emitting unit, and the distance between the circuits and the lenses is greater than twice the focal length of the lenses.

[0009] Preferably, a transparent insulating partition is provided between the light-emitting unit and the film.

[0010] Preferably, the focal length of the lens is less than half the thickness of the spacer.

[0011] Preferably, the lens is a semi-cylindrical structure, and the material of the film is PMMA.

[0012] Preferably, the width of the line is 0.15 mm, the radius of the lens is 0.025 mm, the number of lenses is 10, and the distance between the lens and the line is 0.2 mm.

[0013] Preferably, the lens is a cylindrical, arc-shaped or elliptical structure.

[0014] The method for preparing the transparent display screen with high transparency display effect comprises the following steps: S1. Embed the circuit inside the glass substrate, weld the LED light-emitting monomer on the upper surface of the substrate, and connect the LED light-emitting monomer to the branch of the circuit through the welding pad; S2. Lay a transparent insulating partition above the light-emitting unit; S3. Lay a film on top of the partition material, and the projection of the structural area of ​​the film on the substrate coincides with the circuit.

[0015] The advantages and positive effects of the transparent display screen with high transparency display effect and the preparation method thereof of the present invention are: 1. Several lenses on the film compress the main line into a thinner line, weakening the presence of the line, making it impossible for the naked eye to detect the existence of the line, achieving a transparent effect, improving the light transmittance of the display, and it helps to reduce the difficulty of circuit design. There is no need to design the line specially, and the existing line materials can be used, which reduces the cost.

[0016] 2. Set the distance between the circuit and the lens to more than twice the focal length of the lens, and the distance between the light-emitting unit and the lens to about one times the focal length of the lens, so that the film can reduce the imaging of the circuit without affecting the normal display of the LED light-emitting monomer, which is beneficial to improve the transmittance of the display screen.

[0017] 3. The transparent display screen of the present invention can achieve the purpose of blanking circuits by arranging a thin film on the outer surface, which is simple, easy to operate and low in cost.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partially enlarged schematic diagram of the cross-sectional structure of a display screen according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a top view of a display screen according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the film structure of an embodiment of the present invention; Figure 4 It is a schematic diagram of the cylindrical film structure of the present invention; Figure 5 This is a schematic diagram of the elliptical film structure of the present invention; Figure 6 This is a schematic diagram of the arc-shaped film structure of the present invention; Figure 7 This is a diagram of illumination simulation results of an embodiment of the present invention.

[0020] Reference numerals 1. Circuit; 2. Light-emitting unit; 3. Substrate; 4. Film; 5. Structural area; 6. Partition material; 7. Plane area. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In this application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application. In the event of any inconsistency, the meaning described in this specification or the meaning derived from the contents recorded in this specification shall prevail. In addition, the terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit this application. In order to accurately describe the technical content in this application and to accurately understand the present invention, the following explanations or definitions are given to the terms used in this specification before describing the specific embodiments: The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1 A transparent display screen with high transparency display effect includes a transparent substrate 3, which is made of glass. A plurality of light-emitting units 2 are fixedly arranged on the upper surface of the substrate 3, and a circuit 1 connected to the light-emitting unit 2 is arranged on the substrate 3, and the circuit 1 provides power to the light-emitting unit 2. A transparent film 4 is covered above the light-emitting unit 2, and the film 4 is used to hide the circuit 1.

[0024] like Figure 2 As shown. Circuit 1 is embedded inside one side of substrate 3 close to light-emitting unit 2. Circuit 1 includes a trunk, which is distributed inside substrate 3 in a longitudinal linear array. Branches are arranged on the trunk, which are perpendicular to the trunk. The branches correspond to light-emitting unit 2 one by one and are connected to light-emitting unit 2. The trunk is connected to light-emitting unit 2 through the branch. The width of the trunk is relatively large, and the width of the branch is relatively small, so the branch does not affect the transparent effect of the display screen.

[0025] The light-emitting unit 2 includes an LED light-emitting monomer and a solder pad, and the LED light-emitting monomer is soldered and fixed to the substrate 3 through the solder pad. The LED light-emitting monomer is distributed in a linear array on the substrate 3, and the LED light-emitting monomer is connected to the branch through the solder pad. The LED light-emitting monomer is located between two main circuits.

[0026] like Figure 3 As shown. The film 4 includes a structural area 5 corresponding to the circuit 1 and a plane area 7 corresponding to the light-emitting unit 2, and the structural area 5 makes the circuit 1 invisible. The structural area 5 includes a plurality of parallel lenses arranged on the upper surface of the film 4, and the lenses are parallel to the circuit 1. The lenses are convex lenses. The lenses are located outside the light-emitting angle of the light-emitting unit 2 to prevent the lenses from affecting the transmission of the light of the light-emitting unit 2, causing image distortion and uneven brightness.

[0027] The distance between circuit 1 and the lens is greater than twice the focal length of the lens, and the distance between the LED light-emitting monomer and film 4 is near one focal length of the lens. This allows film 4 to reduce the imaging of circuit 1 without affecting the normal display of the LED light-emitting monomer, which is beneficial to improving the transmittance of the display screen.

[0028] A transparent insulating partition 6 is provided between the light emitting unit 2 and the film 4. The partition 6 is an existing PMMA film, PET film or CPI film, etc. The partition 6 separates the light emitting unit 2 from the film 4, so that there is a certain distance between the LED light emitting monomer and the film 4.

[0029] The focal length of the lens is designed according to the thickness of the spacer 6, so that the focal length of the lens is less than half the thickness of the spacer 6. The focal length of the lens can be controlled by controlling the radius of the lens.

[0030] The lens is a semi-cylindrical structure, and the material of the film 4 is PMMA. Several semi-cylindrical lenses decompose the main line image of the line 1 into multiple fine lines, reducing the width of the lines to a size below that which can be distinguished by the human eye, thereby achieving the purpose of hiding the line 1.

[0031] The semi-cylindrical lens film 4 compresses the main line of line 1 into a thinner line 1, weakening the presence of line 1, making it impossible for the naked eye to detect the presence of line 1, thereby achieving a transparent effect and not affecting the luminous effect and display effect of the LED light-emitting unit 2. Light can pass through the transparent PMMA film 4 without affecting its uniformity of light transmission. The setting of the lens improves the light transmittance of the display screen, and it helps to reduce the difficulty of circuit design.

[0032] The transparent display screen of the present invention can achieve the purpose of blanking the circuit 1 by arranging a film 4 on the outer surface, which is simple, easy to operate and low in cost.

[0033] like Figure 4 , Figure 5 , Figure 6 In addition to being designed as a semi-cylinder, the lens can also be configured as a convex lens structure in other shapes such as a cylinder, an arc or an ellipse.

[0034] The method for preparing the transparent display screen with high transparency display effect comprises the following steps: S1. Embed the circuit 1 inside the glass substrate 3, solder the LED light-emitting monomer on the upper surface of the substrate 3, and connect the LED light-emitting monomer to the branch of the circuit 1 through the soldering pad.

[0035] S2. Lay a transparent insulating spacer 6 on the top of the light-emitting unit 2. The insulating spacer 6 can be combined with the substrate 3 by gluing or hot pressing.

[0036] S3, laying the film 4 on the spacer 6, and compounding the film 4 with the spacer 6 by gluing or electrostatic adsorption. The projection of the structure area 5 of the film 4 on the substrate 3 overlaps with the circuit 1.

[0037] The display screen of the present invention is simulated using optical simulation software. The width of line 1 is 0.15 mm, the radius of the lens is 0.025 mm, the number of lenses is 10, and the distance between the lens and line 1 is 0.2 mm. At a distance of 5 mm from the line, the illumination of the light reflected by line 1 is collected and measured using a plane of 10 mm in the x direction and 5 mm in the y direction to determine the invisible effect of the cylindrical lens film 4 on the scattered light of line 1.

[0038] The illumination simulation results are as follows: Figure 7 As shown in the figure, it can be seen that the illumination is reduced by about 30%, and the spot width is reduced by about 75%, which effectively makes the line 1 invisible and improves the transparent display effect.

[0039] Therefore, the transparent display screen with high transparency display effect and the preparation method thereof described in the present invention can solve the problems of poor light transmittance and high cost of the existing transparent display screen.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A transparent display screen with high transparency display effect, characterized in that: It includes a transparent substrate, a plurality of light-emitting units are arranged on the upper surface of the substrate, circuits connected to the light-emitting units are arranged on the substrate, and a transparent film is covered above the light-emitting units. The film includes a structural area corresponding to the circuit and a plane area corresponding to the light-emitting units, and the structural area makes the circuit invisible.

2. The transparent display screen with high transparency display effect according to claim 1, characterized in that: The circuit is embedded inside one side of the substrate close to the light-emitting unit. The circuit includes a trunk line, which is distributed inside the substrate in a longitudinal linear array. Branch lines are arranged on the trunk line, which are perpendicular to the trunk line and connected to the light-emitting unit.

3. The transparent display screen with high transparency display effect according to claim 2, characterized in that: The light-emitting unit comprises an LED light-emitting monomer and a soldering pad. The LED light-emitting monomer is fixed to the substrate via the soldering pad. The LED light-emitting monomer is distributed in a linear array on the substrate. The LED light-emitting monomer is connected to the branch via the soldering pad.

4. The transparent display screen with high transparency display effect according to claim 1, characterized in that: The structural area includes a plurality of parallel lenses arranged on the upper surface of the film, the lenses are parallel to the circuits, the lenses are located outside the light-emitting angle of the light-emitting unit, and the distance between the circuits and the lenses is greater than twice the focal length of the lenses.

5. The transparent display screen with high transparency display effect according to claim 4, characterized in that: A transparent insulating partition is arranged between the light emitting unit and the film.

6. The transparent display screen with high transparency display effect according to claim 5, characterized in that: The focal length of the lens is less than half of the thickness of the spacer.

7. The transparent display screen with high transparency display effect according to claim 6, characterized in that: The lens is a semi-cylindrical structure, and the material of the film is PMMA.

8. The transparent display screen with high transparency display effect according to claim 7, characterized in that: The width of the line is 0.15 mm, the radius of the lens is 0.025 mm, the number of lenses is 10, and the distance between the lens and the line is 0.2 mm.

9. The transparent display screen with high transparency display effect according to claim 6, characterized in that: The lens is cylindrical, arc-shaped or elliptical in structure.

10. A method for preparing a transparent display screen with high transparency display effect according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Embed the circuit inside the glass substrate, weld the LED light-emitting monomer on the upper surface of the substrate, and connect the LED light-emitting monomer to the branch of the circuit through the welding pad; S2. Lay a transparent insulating partition above the light-emitting unit; S3. Lay a film on top of the partition material, and the projection of the structural area of ​​the film on the substrate coincides with the circuit.

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