LED bare crystal transparent display screen

Abstract

The present invention relates to the technical field of LED display screens, and in particular to an LED bare crystal transparent display screen, comprising a transparent flexible substrate and a light-emitting protection layer, wherein the transparent flexible substrate comprises a transparent flexible base material layer, a first circuit layer and a second circuit layer, wherein the projection of the first circuit layer on the transparent flexible base material layer is perpendicular to the second circuit layer, and the first circuit layer and the second circuit layer are enclosed to form a light-transmitting portion, wherein a plurality of vias are arranged in an array on the transparent flexible base material layer, wherein the first circuit layer is passed through the vias and connected to the second circuit layer; wherein the light-emitting protection layer comprises an LED light-emitting unit and a transparent adhesive layer, wherein the LED light-emitting unit is connected to the light-transmitting portion and is located at an end surface facing the first circuit layer, wherein one end of the LED light-emitting unit is electrically connected to the first circuit layer, and the other end is passed through the vias and electrically connected to the second circuit layer, wherein the transparent adhesive layer is applied to both end surfaces of the transparent flexible substrate, and the transparent adhesive layer surrounds the LED light-emitting unit, the first circuit layer and the second circuit layer. The present invention aims to improve the light-transmitting effect of a transparent display screen.

Description

Technical Field

[0001] The invention relates to the technical field of LED display screens, and in particular to an LED bare crystal transparent display screen. Background Art

[0002] As a typical application of LED light-emitting devices, LED display screens have been widely used in various usage environments. In most existing LED display screen application scenarios, the LED display screen body is non-transparent, that is, the LED light-emitting devices therein can only display on one side, and the LED display screen will also be blocked when not displaying. In order to enable the LED display screen to display in both directions and to allow direct light transmission when not displaying, LED transparent display screens came into being.

[0003] In the LED transparent display screen, the substrate is transparent. After the LED light-emitting device is set, there is a gap between the chips. In this way, the light emitted by the LED light-emitting device can be emitted from both sides of the substrate, and the external light can also pass through the transparent substrate, thereby achieving both content display and perspective display effect. It is widely used in glass curtain walls, glass guardrails, glass windows, indoor and outdoor sliding glass doors, interior decoration, and vehicle-mounted displays.

[0004] In the related art, the display transmittance of the transparent display screen is mainly affected by the material of the transparent substrate itself and the circuit layer, and its light transmittance effect is often poor. Due to the limitations of the circuit design, conductive films are attached to the two end surfaces of the flexible transparent film, a soldering pad is set on the first conductive film, and an electronic branch is set on the second conductive film. The first conductive film and the second conductive film need to be correspondingly arranged and attached to the flexible transparent film. The position where each soldering pad is set needs to correspond to an electronic branch, and a via is also opened on the flexible transparent film, and an electrical connection part is provided in the via. By correspondingly arranging the soldering pad, the electrical connection part and the electronic branch, the constructed driving circuit can drive the LED chip to work normally.

[0005] However, in order to facilitate connection and avoid circuit problems, and to ensure the light transmittance of the transparent display, the conductive film needs to fit relatively tightly on the flexible transparent film, and the pads and electronic branches need to be accurately etched out corresponding to the via positions. Precise positioning and etching are required at all times, resulting in the inability to improve the production efficiency of the display. The light transmittance is directly related to the density of the driving branches. In order to ensure the display effect, the light transmittance is often poor. Summary of the invention

[0006] The main purpose of the present invention is to provide a LED bare crystal transparent display screen, aiming to improve the light transmission effect of the transparent display screen.

[0007] To achieve the above-mentioned purpose, the present invention provides a bare LED transparent display screen, comprising a transparent flexible substrate and a light-emitting protective layer:

[0008] The transparent flexible substrate comprises a transparent flexible substrate layer, a first circuit layer and a second circuit layer, the first circuit layer and the second circuit layer are relatively connected to two end surfaces of the transparent flexible substrate layer, the projection of the first circuit layer on the transparent flexible substrate layer is perpendicular to the second circuit layer, and the first circuit layer and the second circuit layer are enclosed to form a light-transmitting portion, a plurality of via holes are arranged in an array on the transparent flexible substrate layer, the first circuit layer is passed through the via holes and connected to the second circuit layer; and

[0009] The light-emitting protection layer includes an LED light-emitting unit and a transparent adhesive layer. The LED light-emitting unit is connected to the light-transmitting portion and is located at the end surface facing the first circuit layer. One end of the LED light-emitting unit is electrically connected to the first circuit layer, and the other end is penetrated through the via hole and electrically connected to the second circuit layer. The transparent adhesive layer is attached to the two end surfaces of the transparent flexible substrate, and the transparent adhesive layer surrounds the LED light-emitting unit, the first circuit layer and the second circuit layer.

[0010] In one embodiment of the present application, the light-transmitting portion includes a plurality of light-transmitting units, one end of the light-transmitting unit is connected to the first circuit layer, and the other end is connected to the second circuit layer, and the side width of the light-transmitting unit is much larger than the line width of the first circuit layer and the second circuit layer.

[0011] In one embodiment of the present application, the first circuit layer is wrapped around the LED light-emitting unit, and the LED light-emitting unit includes a solder pad and a light-emitting monomer. The solder pad is arranged on the end surface of the light-transmitting unit facing the first circuit layer, and the light-emitting monomer is electrically connected to the solder pad.

[0012] In one embodiment of the present application, the LED light-emitting units are provided in a plurality of groups, the plurality of groups of LED light-emitting units are arrayed in the light-transmitting portion, the light-emitting monomers are composed of bare crystal chips and / or CSP chips, and the transparent adhesive layer is sealed on the light-emitting monomers.

[0013] In one embodiment of the present application, the inner diameter of the via is larger than the line width of the first circuit layer and the second circuit layer, the inner wall of the via is covered with a conductive covering layer, the conductive covering layer is wrapped around the upper and lower end surfaces of the via, and the conductive covering layer is electrically connected to the first circuit layer and the second circuit layer.

[0014] In one embodiment of the present application, the first circuit layer includes a plurality of groups of longitudinal conductive wires evenly spaced apart, the plurality of groups of longitudinal conductive wires cover the transparent flexible substrate layer, the ends of the longitudinal conductive wires facing away from the transparent flexible substrate are provided with a first connecting section, the first connecting section penetrates the light-emitting protective layer, and is located at the outer edge of the transparent flexible substrate.

[0015] In one embodiment of the present application, the second circuit layer includes a plurality of groups of evenly spaced transverse conductive lines, the plurality of groups of transverse conductive lines cover the end surface of the transparent flexible substrate layer facing away from the longitudinal conductive lines, the transverse conductive lines are perpendicular to the longitudinal conductive lines, and a second connecting segment is provided at the end facing away from the transparent flexible substrate, the second connecting segment penetrates the light-emitting protection layer and is located at the outer edge of the transparent flexible substrate, and the first connecting segment and the second connecting segment together constitute a control connecting end.

[0016] In one embodiment of the present application, the outer edge of the light-emitting protection layer is covered with an insulating covering layer, the insulating covering layer is covered on the outer edge of the transparent flexible substrate, and the projection of the insulating covering layer on the transparent flexible substrate layer is covered on the first connecting end and the second connecting end.

[0017] In one embodiment of the present application, a signal adapter is further included, the bottom end of the light-emitting protection layer is penetrated through the signal adapter, and the first circuit layer and the second circuit layer are electrically connected to the signal adapter.

[0018] In one embodiment of the present application, the signal adapter includes a PCB driver board and a signal socket:

[0019] The PCB driving board is disposed through the light-emitting protection layer and is electrically connected to the control connection terminal; and

[0020] The signal seat is provided with a plug-in slot relative to the light-emitting protective layer, and the plug-in slot is provided with two sets of clamping parts facing the light-emitting protective layer. The light-emitting protective layer is passed through the plug-in slot and clamped on the two clamping parts. The PCB driving board is passed through the plug-in slot and is electrically connected to the signal seat.

[0021] The technical solution of the present invention adopts a method of functionally dividing the transparent display screen into two parts, a transparent flexible substrate and a light-emitting protective layer. The transparent flexible substrate further comprises a transparent flexible substrate layer, a first circuit layer and a second circuit layer. The first circuit layer and the second circuit layer are arranged opposite to each other and are respectively connected to one end surface of the transparent flexible substrate layer. The first circuit layer is composed of a plurality of groups of longitudinally arranged wires, and the second circuit layer is composed of a plurality of transversely arranged wires. At least the projection of the first circuit layer in the transparent flexible substrate layer on the transparent flexible substrate is perpendicular to the second circuit layer. The first circuit layer and the second circuit layer are arranged in a mesh structure on the substrate. In this way, as long as the line width of the circuit layer is much smaller than The interval between two adjacent wires is small, so the light-transmitting part enclosed by the first and second circuit layers can have good light transmittance. A plurality of vias are arranged in an array on the transparent flexible substrate layer. The first circuit layer is electrically connected to the second circuit layer through the vias. The vias do not need to be directly connected to the circuit layer. By additionally arranging extensions at both ends of the vias, the circuit layers can also have the same effect by connecting the extensions. In the related art, the vias must face the circuit layer because of the additional arrangement of the conductive film. Otherwise, the extensions may damage the conductive film. The circuit layer can be arranged on the substrate without repeated positioning, thereby forming a light-transmitting part, which can effectively improve production efficiency. The luminous protective layer also includes The LED light-emitting unit and the transparent adhesive layer are included. The LED light-emitting unit is connected to the end face of the light-transmitting part facing the first circuit layer. One side of the light-transmitting part is connected to the first circuit layer, and the other side is connected to the second circuit layer. Because the second circuit layer is on the opposite back side, the LED light-emitting unit is located between adjacent longitudinal wires. The projection of the LED light-emitting unit on the substrate layer can be connected to the second circuit layer. This structure is more efficient in terms of production. The LED light-emitting unit is located at the light-transmitting part, which can effectively improve the light transmission effect, so that both end faces of the transparent display screen can display the picture well, and good light transmittance can also be guaranteed when the display screen is in a non-working state. One end of the D light-emitting unit is connected to the first circuit layer, and the other end can be electrically connected to the second circuit layer through an extension part. Even if the circuit layer is slightly bent, it will not affect its normal operation, and can effectively guarantee the service life. The LED light-emitting unit of the present application is a bare crystal structure. By connecting the control chip through multiple first circuit layers and second circuit layers, a group of control chips can control multiple groups of LED light-emitting units, which can effectively facilitate later maintenance. The transparent adhesive layer is applied to the two end surfaces of the substrate and completely covers the circuit layer and the LED light-emitting unit. The transparent adhesive layer can protect the bare crystal, ensure the transmittance, and effectively save costs and improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 This is a schematic structural diagram of an embodiment of an LED bare crystal transparent display screen of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of an embodiment of an LED bare die transparent display screen of the present invention;

[0025] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 This is a schematic diagram of the circuit structure of an embodiment of an LED bare crystal transparent display screen of the present invention;

[0027] Figure 5 It is a cross-sectional view of an embodiment of an LED bare die transparent display screen of the present invention.

[0028] Description of Figure Numbers:

[0029] 1. Transparent flexible substrate; 11. Transparent flexible substrate layer; 12. First circuit layer; 121. Longitudinal conductor; 122. First connecting section; 13. Second circuit layer; 131. Horizontal conductor; 132. Second connecting section; 14. Control connecting terminal; 2. Via hole; 21. Conductive covering layer; 3. Transparent part; 31. Transparent unit; 4. Light-emitting protection layer; 5. LED light-emitting unit; 51. Solder pad; 52. Light-emitting monomer; 6. Transparent adhesive layer; 7. Insulating covering layer; 8. Signal adapter; 81. PCB driver board; 9. Signal seat; 91. Plug slot; 92. Card connection part.

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] Reference Figures 1 to 5In one embodiment of the present invention, a LED bare crystal transparent display screen is proposed, comprising a transparent flexible substrate 1 and a light-emitting protective layer 4, wherein the transparent flexible substrate 1 comprises a transparent flexible substrate layer 11, a first circuit layer 12 and a second circuit layer 13, wherein the first circuit layer 12 and the second circuit layer 13 are relatively connected to the two end surfaces of the transparent flexible substrate layer 11, wherein the projection of the first circuit layer 12 on the transparent flexible substrate layer 11 is perpendicular to the second circuit layer 13, and the first circuit layer 12 and the second circuit layer 13 are enclosed to form a light-transmitting portion 3, wherein a plurality of light-transmitting portions 3 are arranged in an array on the transparent flexible substrate layer 11 The first circuit layer 12 is provided through the via hole 2 and connected to the second circuit layer 13; the light-emitting protection layer 4 includes an LED light-emitting unit 5 and a transparent adhesive layer 6, the LED light-emitting unit 5 is connected to the light-transmitting portion 3 and is located at the end surface facing the first circuit layer 12, one end of the LED light-emitting unit 5 is electrically connected to the first circuit layer 12, and the other end is provided through the via hole 2 and electrically connected to the second circuit layer 13, the transparent adhesive layer 6 is applied to the two end surfaces of the transparent flexible substrate 1, and the transparent adhesive layer 6 is wrapped around the LED light-emitting unit 5, the first circuit layer 12 and the second circuit layer 13.

[0033] In an LED bare crystal transparent display screen of the present application, the transparent display screen is functionally divided into two parts: a transparent flexible substrate 1 and a light-emitting protective layer 4. The transparent flexible substrate 1 further includes a transparent flexible substrate layer 11, a first circuit layer 12 and a second circuit layer 13. The first circuit layer 12 and the second circuit layer 13 are arranged opposite to each other and are respectively connected to one end surface of the transparent flexible substrate layer 11. The first circuit layer 12 is composed of a plurality of groups of longitudinally arranged wires, and the second circuit layer 13 is composed of a plurality of transversely arranged wires. The projection of at least the first circuit layer 12 in the transparent flexible substrate layer 11 on the transparent flexible substrate 1 is perpendicular to the second circuit layer 13. The first circuit layer 12 and the second circuit layer 13 are arranged on the substrate in a mesh structure. In this case, as long as the line width of the circuit layer is much smaller than the interval between two adjacent wires, the light-transmitting portion 3 enclosed by the first and second circuit layers 13 can have good light transmittance. A plurality of vias 2 are arranged in an array on the transparent flexible substrate layer 11. The first circuit layer 12 is electrically connected to the second circuit layer 13 through the vias 2. The vias 2 do not need to be directly connected to the circuit layer. The same effect can be achieved by additionally arranging extensions at both ends of the vias 2 and connecting the circuit layers through the extensions. In the related art, the vias 2 must face the circuit layer because of the additional arrangement of the conductive film. Otherwise, the extension may damage the conductive film. The circuit layer can be arranged on the substrate without repeated positioning, thereby forming the light-transmitting portion 3, which can effectively improve production efficiency. The light-emitting protection layer 4 further includes an LED light-emitting unit 5 and a transparent adhesive layer 6. The LED light-emitting unit 5 is connected to the end face of the light-transmitting portion 3 facing the first circuit layer 12. One side of the light-transmitting portion 3 is connected to the first circuit layer 12, and the other side is connected to the second circuit layer 13. Because the second circuit layer 13 is on the opposite back side, the LED light-emitting unit 5 is located between adjacent longitudinal wires 121. The projection of the LED light-emitting unit 5 on the substrate layer can be connected to the second circuit layer 13. This structure is more efficient in terms of production. The LED light-emitting unit 5 is located at the light-transmitting portion 3, which can effectively improve the light transmission effect, so that both end faces of the transparent display screen can display the picture well, and it can also be guaranteed when the display screen is in a non-working state. Good light transmittance, one end of the LED light-emitting unit 5 is connected to the first circuit layer 12, and the other end can be electrically connected to the second circuit layer 13 through an extension part. Even if the circuit layer is slightly bent, it will not affect its normal operation, and can effectively guarantee the service life. The LED light-emitting unit 5 of the present application is a bare crystal structure. By connecting the control chip through multiple first circuit layers 12 and second circuit layers 13, a group of control chips can control multiple groups of LED light-emitting units 5, which can effectively facilitate later maintenance. The transparent adhesive layer 6 is applied to the two end surfaces of the substrate and completely covers the circuit layer and the LED light-emitting unit 5. The transparent adhesive layer 6 can protect the bare crystal, ensure the light transmittance, effectively save costs, and improve product quality.

[0034] Furthermore, the first circuit layer 12 includes a longitudinal wire 121 and a first connecting section 122. The first circuit layer 12 includes a plurality of longitudinal wires 121, which are evenly spaced and arranged on the front end surface of the transparent flexible substrate layer 11, and the first connecting section 122 is provided at both ends of the longitudinal wire 121. The first connecting section 122 needs to be provided at both upper and lower ends of the first circuit layer 12. In this embodiment, the first connecting section 122 is the outer edge of the longitudinal wire 121 at the transparent colloid, and the plurality of groups of longitudinal wires 121 are gathered together by bending, so that the longitudinal wires 121 are conveniently connected to the control chip. The intervals of the plurality of groups of longitudinal wires 121 in the first circuit layer 12 at the first connecting section 122 gradually decrease as they move away from the longitudinal wire 121 body, and finally achieve a gathering effect. Different sections of the plurality of groups of longitudinal wires 121 can be gathered at different positions and connected by providing a plurality of groups of PCB driver boards 81, so that the control system can make the LED bare crystal transparent display screen work after receiving a remote control command.

[0035] Furthermore, the second circuit layer 13 includes a transverse conductor 131 and a second connecting segment 132. The second circuit layer 13 is arranged transversely relative to the first circuit layer 12 and is located on the end face of the transparent flexible substrate layer 11 facing away from the first circuit layer 12. The structure of the second circuit layer 13 is similar to that of the first circuit layer 12. By setting multiple segments / one segment of the second connecting segment 132, the circuit layer can be connected to the chip for easy control. A group of first connecting segments 122 corresponds to a group of second connecting segments 132. The two connecting segments are combined to form a control connection terminal 14. Setting the PCB driver board 81 at this position can improve the operability of the screen.

[0036] Furthermore, the end face array of the transparent flexible substrate layer 11 has a plurality of vias 2, and the first circuit layer 12 and the second circuit layer 13 can be electrically connected by using the vias 2. The shape of the vias 2 can be arbitrary. In order to facilitate the processing of the screen and the layout of the circuit, the vias 2 are generally circular or elliptical. In this embodiment, the inner diameter of the vias 2 is greater than the line width of the circuit layer. Such a structure can facilitate the layout of the circuit, so that the corresponding circuits in the first circuit layer 12 and / or the second circuit layer 13 can pass through the position of the vias 2. Such a structure can reduce the design difficulty and processing difficulty of the circuit layer, effectively improve the yield rate, and in order to facilitate the effect of electrical connection, a conductive covering layer 21 can be provided at the inner wall of the via 2. The conductive covering layer 21 extends to the upper and lower end faces of the via 2, surrounds the upper and lower end face edges of the via 2, and the surrounding width is greater than or equal to the line width. Among them, the conductive covering layer 21 can be laid out together with the first circuit layer 12 and the second circuit layer 13, that is, the copper layer is covered in the via 2 by electroplating, etching and other processes. Moreover, in order to reduce the difficulty of circuit design and processing accuracy, the conductive covering layer 21 can extend to the two end faces of the via hole 2, and an extension portion with a full circle width greater than or equal to the line width is set around the edge of the hole position of the via hole 2, so that during the processing, even if part of the lines in the first circuit layer 12 and the second circuit layer 13 are offset and do not reach the center of the via hole 2 in the expected manner, they can be normally connected to the conductive covering layer 21, thereby achieving electrical connection. In some optional embodiments, in order to further reduce the difficulty of circuit design, each via hole 2 can be arranged in an array on the transparent substrate layer, and each via hole 2 is located on the same side of the adjacent LED light-emitting unit 5 components. In this way, regardless of whether the via hole 2 is set at the positive or negative pole of the LED light-emitting unit 5 component, its corresponding positive and negative wiring can be designed uniformly, thereby effectively reducing the difficulty of circuit design.

[0037] Furthermore, the projections of the longitudinal wires 121 and the transverse wires 131 on the transparent flexible substrate 1 enclose a mesh structure, and each group of meshes is a group of light-transmitting units 31. Because the interval between the wires is much larger than the line width, the spacing between the generally parallel lines is at least greater than 3.5 times the line width. The presence of the light-transmitting units 31 can weaken the presence of the line layer, making it impossible for the naked eye to detect the presence of the line, thereby achieving a transparent effect, so that both end surfaces of the display screen can display the picture, and when the lines in the first line layer 12 and the second line layer 13 are perpendicular to each other, uniformly distributed rectangular gaps will be formed between the first line layer 12 and the second line layer 13, and the greater the ratio of the lines perpendicular to each other in the first line layer 12 and the second line layer 13, the more uniform the distribution of the rectangular gaps, so that the transmittance of the light-transmitting flexible display panel is more uniform, which means that the light can evenly pass through the gaps between the line layers. Compared with the solution where the lines are crossed, the line layer has a lower influence on the transmittance of the light-transmitting flexible display panel, especially the uniformity of its light transmittance is well guaranteed. Moreover, such a structure can reduce the difficulty of circuit design and reduce the influence of the circuit layer on the transmittance of the light-transmitting flexible display panel.

[0038] Further, the light-emitting protection layer 4 includes an LED light-emitting unit 5 and a transparent adhesive layer 6, and the LED light-emitting unit 5 includes a solder pad 51 and a light-emitting monomer 52. Because the other side of the light-transmitting unit 31 is longer than the back of the LED light-emitting unit 5, the LED light-emitting unit 5 can be arranged between adjacent first circuit layers 12. The LED light-emitting unit 5 is connected to the light-transmitting portion 3, which can significantly improve the double-sided display effect of the display screen, and will not hinder the light-transmitting effect. There is no essential difference between the front and back sides of the transparent flexible substrate layer 11. The solder pad 51 is arranged on any end face, and the light-emitting monomer 52 is installed. The expected effect can be achieved, making the structural design of the display screen more reasonable, and the light transmittance and production rate of the display screen can be effectively improved. In this embodiment, the type of the light-emitting monomer 52 can specifically include at least one of a bare crystal chip and a CSP chip. The bare crystal chip refers to an LED chip that is not provided with components including packaging glue, a bracket, etc., while the CSP chip refers to an LED chip that is provided with packaging glue but does not have a bracket; wherein, in the structure of the bare crystal chip, it can achieve light emitting effects of different colors by arranging a corresponding quantum dot layer on the epitaxial layer. The CSP chip can be based on the LED bare crystal chip of the corresponding color light, and the corresponding fluorescent glue layer can be laid to achieve different colors of light emission effects. For example, a blue light bare crystal chip can display white light by laying a yellow fluorescent glue layer. These chips are different from the already packaged LED chips. In order to protect them, transparent glue layers 6 need to be coated on both end faces of the substrate layer. The transparent glue layer 6 can encapsulate the circuit layer and the LED light-emitting unit 5 inside, so that even the bare crystal will not be damaged. The bare crystal is simpler in structure than the finished LED chip, and the finished LED chip has a configured network address inside. If the LED chip is damaged, it will become very troublesome to replace the LED chip, but the bare crystal does not need to be additionally configured with a network address. Connecting the PCB driver board 81 through the circuit layer can make a group of PCB driver boards 81 connect to multiple groups of light-emitting monomers 52 at the same time. If the bare crystal is damaged, it can be directly replaced to work normally, which can effectively improve the maintenance efficiency.

[0039] Furthermore, an insulating covering layer 7 is provided at the outer edge of the substrate. The insulating covering layer 7 can be made of non-light-transmitting insulating materials, such as gum, plastic, etc. The general insulating covering layer 7 is a black material, which can be used for the side wall of the device display screen to avoid light leakage, and the circuit layer can be encapsulated in the insulating covering layer 7 to avoid damage to the circuit layer and affect the normal operation of the display screen. The projection of the insulating covering layer 7 on the base material layer covers the first connecting section 122 and the second connecting section 132, which can make the circuit structure more reasonable and improve the user experience.

[0040] Furthermore, the LED bare crystal transparent display screen also includes a signal adapter 8. The main structures of the signal adapter 8 include a PCB driver board 81 and a signal socket 9. The signal adapter 8 can have the effect of a support leg, which is used to support the display screen so that the display screen can be easily installed. The PCB driver board 81 can be provided with multiple groups, and each PCB driver board 81 is connected to a group of control connection terminals 14, which can facilitate the control of the display screen. The PCB driver board 81 is inserted into the signal socket 9 and electrically connected to the signal socket 9. The signal socket 9 can be equipped with a wireless connection module or an operation panel to cooperate with the PCB driver board 81 to control the display screen. A plug-in slot 91 is provided in the signal socket 9, and two groups of clamping parts 92 are relatively arranged in the plug-in slot 91. The display screen is inserted in the plug-in slot 91, and the display screen can be clamped by the clamping part 92, which can make the use of the display screen more convenient.

[0041] Combined with reference Figures 1 to 4 In one embodiment of the present application, the light-transmitting portion 3 includes a plurality of light-transmitting units 31 , one end of the light-transmitting unit 31 is connected to the first circuit layer 12 , and the other end is connected to the second circuit layer 13 , and the side width of the light-transmitting unit 31 is much larger than the line width of the first circuit layer 12 and the second circuit layer 13 .

[0042] In an LED bare crystal transparent display screen of the present application, the projections of the longitudinal wires 121 and the transverse wires 131 on the transparent flexible substrate 1 enclose a mesh structure, and each group of meshes is a group of light-transmitting units 31. Because the interval between the wires is much larger than the line width, the spacing between the lines generally arranged in parallel is at least greater than 3.5 times the line width. The presence of the light-transmitting units 31 can weaken the presence of the circuit layer, so that the naked eye cannot perceive the presence of the circuit, and achieve a transparent effect, so that both end surfaces of the display screen can display the picture, and when the lines in the first circuit layer 12 and the second circuit layer 13 are perpendicular to each other, uniformly distributed rectangular gaps will be formed between the first circuit layer 12 and the second circuit layer 13, and the greater the ratio of the lines perpendicular to each other in the first circuit layer 12 and the second circuit layer 13, the more uniform the distribution of the rectangular gaps, so that the transmittance of each part of the light-transmitting flexible display panel is more uniform, which means that the light can be uniformly transmitted through the gaps between the circuit layers. Compared with the solution where the lines are crossed, the circuit layer has a lower influence on the transmittance of the light-transmitting flexible display panel, especially the uniformity of its transmittance is well guaranteed. Moreover, such a structure can reduce the difficulty of circuit design and reduce the influence of the circuit layer on the transmittance of the light-transmitting flexible display panel.

[0043] Combined with reference Figure 3 to Figure 4In one embodiment of the present application, the first circuit layer 12 is wrapped around the LED light-emitting unit 5, and the LED light-emitting unit 5 includes a solder pad 51 and a light-emitting monomer 52. The solder pad 51 is arranged on the end surface of the light-transmitting unit 31 facing the first circuit layer 12, and the light-emitting monomer 52 is electrically connected to the solder pad 51.

[0044] In a bare crystal LED transparent display screen of the present application, the light-emitting protective layer 4 includes an LED light-emitting unit 5 and a transparent adhesive layer 6, and the LED light-emitting unit 5 includes a solder pad 51 and a light-emitting monomer 52. Because the other side of the light-transmitting unit 31 is longer than the back of the LED light-emitting unit 5, the LED light-emitting unit 5 can be arranged between adjacent first circuit layers 12. The LED light-emitting unit 5 is connected to the light-transmitting portion 3, which can significantly improve the double-sided display effect of the display screen, and will not hinder the light-transmitting effect. There is no essential difference between the front and back sides of the transparent flexible substrate layer 11. The solder pad 51 is arranged on any end face, and the light-emitting monomer 52 is installed. The expected effect can be achieved, making the structural design of the display screen more reasonable, and the light transmittance and production rate of the display screen can be effectively improved. In this embodiment, the type of the light-emitting monomer 52 can specifically include at least one of a bare crystal chip and a CSP chip. The bare crystal chip refers to an LED chip that is not provided with components including packaging glue, a bracket, etc., while the CSP chip refers to an LED chip that is provided with packaging glue but does not have a bracket; wherein, in the structure of the bare crystal chip, it can achieve light emitting effects of different colors by arranging a corresponding quantum dot layer on the epitaxial layer. The CSP chip can be based on the LED bare crystal chip of the corresponding color light, and the corresponding fluorescent glue layer can be laid to achieve different colors of light emission effects. For example, a blue light bare crystal chip can display white light by laying a yellow fluorescent glue layer. These chips are different from the already packaged LED chips. In order to protect them, transparent glue layers 6 need to be coated on both end faces of the substrate layer. The transparent glue layer 6 can encapsulate the circuit layer and the LED light-emitting unit 5 inside, so that even the bare crystal will not be damaged. The bare crystal is simpler in structure than the finished LED chip, and the finished LED chip has a configured network address inside. If the LED chip is damaged, it will become very troublesome to replace the LED chip, but the bare crystal does not need to be additionally configured with a network address. Connecting the PCB driver board 81 through the circuit layer can make a group of PCB driver boards 81 connect to multiple groups of light-emitting monomers 52 at the same time. If the bare crystal is damaged, it can be directly replaced to work normally, which can effectively improve the maintenance efficiency.

[0045] Combined with reference Figure 2 In one embodiment of the present application, a plurality of LED light-emitting units 5 are provided, and the plurality of LED light-emitting units 5 are arrayed in the light-transmitting portion 3 . The light-emitting monomer 52 is composed of a bare crystal chip and / or a CSP chip, and a transparent adhesive layer 6 is sealed on the light-emitting monomer 52 .

[0046] In a LED bare crystal transparent display screen of the present application, in this embodiment, the type of the light-emitting monomer 52 can specifically include at least one of a bare crystal chip and a CSP chip. The bare crystal chip refers to an LED chip that is not provided with components including packaging glue, a bracket, etc., while the CSP chip refers to an LED chip that is provided with packaging glue but does not have a bracket; wherein, in the structure of the bare crystal chip, it can achieve light emitting effects of different colors by setting a corresponding quantum dot layer on the epitaxial layer. The CSP chip can achieve light emitting effects of different colors based on the LED bare crystal chip of the corresponding color light and laying a corresponding fluorescent glue layer. For example, a blue light bare crystal chip can display white light by laying a yellow fluorescent glue layer. These chips are different from the packaged LED chips. In order to protect them, a transparent adhesive layer 6 needs to be coated on both end surfaces of the substrate layer. The transparent adhesive layer 6 can encapsulate the circuit layer and the LED light-emitting unit 5 inside, so that even the bare crystal will not be damaged. The bare crystal has a simpler structure than the finished LED chip, and the finished LED chip has a configured network address inside. If the LED chip is damaged, it will become very troublesome to replace the LED chip. However, the bare crystal does not need to be additionally configured with a network address. Connecting the PCB driver board 81 through the circuit layer can enable a group of PCB driver boards 81 to connect to multiple groups of light-emitting monomers 52 at the same time. If the bare crystal is damaged, it can be directly replaced to work normally, which can effectively improve the maintenance efficiency.

[0047] Combined with reference Figure 3 In one embodiment of the present application, the inner diameter of the via 2 is larger than the line width of the first circuit layer 12 and the second circuit layer 13, and the inner wall of the via 2 is covered with a conductive covering layer 21, which wraps around the upper and lower end surfaces of the via 2, and the conductive covering layer 21 is electrically connected to the first circuit layer 12 and the second circuit layer 13.

[0048] In an LED bare crystal transparent display screen of the present application, in this embodiment, the inner diameter of the via 2 is larger than the line width of the circuit layer. Such a structure can facilitate the layout of the circuit, so that the corresponding circuits in the first circuit layer 12 and / or the second circuit layer 13 can pass through the position of the via 2. Such a structure can reduce the design difficulty and processing difficulty of the circuit layer, effectively improve the yield rate, and in order to facilitate the effect of electrical connection, a conductive covering layer 21 can be set on the inner wall of the via 2, and the conductive covering layer 21 extends to the upper and lower end surfaces of the via 2, surrounds the upper and lower end surface edges of the via 2, and the surrounding width is greater than or equal to the line width.

[0049] Combined with reference Figure 3In one embodiment of the present application, the first circuit layer 12 includes a plurality of groups of longitudinal conductive wires 121 evenly spaced apart, the plurality of groups of longitudinal conductive wires 121 cover the transparent flexible substrate layer 11, and a first connecting segment 122 is provided at the end of the longitudinal conductive wire 121 away from the transparent flexible substrate 1. The first connecting segment 122 penetrates the light-emitting protection layer 4 and is located at the outer edge of the transparent flexible substrate 1.

[0050] In an LED bare crystal transparent display screen of the present application, the first circuit layer 12 includes a longitudinal wire 121 and a first connecting section 122. The first circuit layer 12 includes a plurality of longitudinal wires 121, and the plurality of longitudinal wires 121 are evenly spaced and arranged on the front end surface of the transparent flexible substrate layer 11, and the first connecting section 122 is provided at both ends of the longitudinal wire 121. The first connecting section 122 needs to be provided at both upper and lower ends of the first circuit layer 12. In this embodiment, the first connecting section 122 is the outer edge of the longitudinal wire 121 at the transparent colloid, and the plurality of groups of longitudinal wires 121 are gathered together by bending, so that the longitudinal wires 121 are conveniently connected to the control chip. The intervals of the plurality of groups of longitudinal wires 121 in the first circuit layer 12 at the first connecting section 122 gradually decrease as they move away from the longitudinal wire 121 body, and finally achieve a gathering effect. Different sections of the plurality of groups of longitudinal wires 121 can be gathered at different positions and connected by providing a plurality of groups of PCB drive boards 81, so that the control system can make the LED bare crystal transparent display screen work after receiving a remote control command.

[0051] Combined with reference Figure 3 to Figure 4 In one embodiment of the present application, the second circuit layer 13 includes a plurality of groups of evenly spaced transverse conductors 131, the plurality of groups of transverse conductors 131 cover the end surface of the transparent flexible substrate layer 11 away from the longitudinal conductors 121, the transverse conductors 131 are perpendicular to the longitudinal conductors 121, and a second connecting segment 132 is provided at the end away from the transparent flexible substrate 1, the second connecting segment 132 penetrates the light-emitting protection layer 4, and is located at the outer edge of the transparent flexible substrate 1, and the first connecting segment 122 and the second connecting segment 132 together constitute the control connection terminal 14.

[0052] In an LED bare crystal transparent display screen of the present application, the second circuit layer 13 includes a transverse wire 131 and a second connecting segment 132. The second circuit layer 13 is arranged transversely relative to the first circuit layer 12 and is located on the end face of the transparent flexible substrate layer 11 away from the first circuit layer 12. The structure of the second circuit layer 13 is similar to that of the first circuit layer 12. By setting multiple / one second connecting segment 132, the circuit layer can be connected to the chip for easy control. A group of first connecting segments 122 corresponds to a group of second connecting segments 132. The two connecting segments are combined to form a control connection terminal 14. Setting a PCB driver board 81 at this position can improve the operability of the screen.

[0053] Combined with reference Figures 1 to 5 In one embodiment of the present application, the outer edge of the luminous protection layer 4 is covered with an insulating covering layer 7, the insulating covering layer 7 is covered on the outer edge of the transparent flexible substrate 1, and the projection of the insulating covering layer 7 on the transparent flexible substrate layer 11 is covered on the first connecting end and the second connecting end.

[0054] In an LED bare crystal transparent display screen of the present application, an insulating covering layer 7 is provided at the outer edge of the substrate. The insulating covering layer 7 can be made of non-light-transmitting insulating materials, such as gum, plastic, etc. The general insulating covering layer 7 is a black material, which can be used to cover the side wall of the device display screen to avoid light leakage, and the circuit layer can be encapsulated in the insulating covering layer 7 to avoid damage to the circuit layer and affect the normal operation of the display screen. The projection of the insulating covering layer 7 on the substrate layer covers the first connecting section 122 and the second connecting section 132, which can make the circuit structure more reasonable and improve the user experience.

[0055] Combined with reference Figure 1 In one embodiment of the present application, a signal adapter 8 is further included, the bottom end of the light-emitting protection layer 4 is penetrated through the signal adapter 8, and the first circuit layer 12 and the second circuit layer 13 are electrically connected to the signal adapter 8.

[0056] In an LED bare crystal transparent display screen of the present application, the LED bare crystal transparent display screen also includes a signal adapter 8. The main structure of the signal adapter 8 includes a PCB driver board 81 and a signal seat 9. The signal adapter 8 can have the effect of a support leg, which is used to support the display screen so that the display screen can be easily installed. The PCB driver board 81 can be provided with multiple groups, and each PCB driver board 81 is connected to a group of control connection terminals 14, which can facilitate the control of the display screen. The PCB driver board 81 is inserted into the signal seat 9 and electrically connected to the signal seat 9. The signal seat 9 can be configured with a wireless connection module or an operation panel to cooperate with the PCB driver board 81 to control the display screen. A plug-in slot 91 is provided in the signal seat 9, and two groups of clamping parts 92 are relatively arranged in the plug-in slot 91. The display screen is inserted in the plug-in slot 91, and the display screen can be clamped by the clamping part 92, which can make the use of the display screen more convenient.

[0057] Combined with reference Figure 1 In one embodiment of the present application, the signal adapter 8 includes a PCB driving board 81 and a signal seat 9. The PCB driving board 81 is inserted into the light-emitting protective layer 4 and is electrically connected to the control connection terminal 14. The signal seat 9 is provided with a plug-in slot 91 relative to the light-emitting protective layer 4. The plug-in slot 91 is provided with two groups of clamping parts 92 facing the light-emitting protective layer 4. The light-emitting protective layer 4 is inserted into the plug-in slot 91 and is clamped into the two clamping parts 92. The PCB driving board 81 is inserted into the plug-in slot 91 and is electrically connected to the signal seat 9.

[0058] In an LED bare crystal transparent display screen of the present application, the signal adapter 8 mainly comprises a PCB driver board 81 and a signal seat 9. The signal adapter 8 can have the effect of a support leg for supporting the display screen so that the display screen can be easily installed. The PCB driver board 81 can be provided with multiple groups, and each PCB driver board 81 is connected with a group of control connection terminals 14, which can conveniently control the display screen. The PCB driver board 81 is inserted into the signal seat 9 and electrically connected to the signal seat 9. The signal seat 9 can be configured with a wireless connection module or an operation panel to cooperate with the PCB driver board 81 to control the display screen. A plug-in slot 91 is provided in the signal seat 9, and two groups of clamping parts 92 are relatively arranged in the plug-in slot 91. The display screen is inserted into the plug-in slot 91, and the display screen can be clamped by the clamping part 92, which can make the use of the display screen more convenient, and cooperate with the wiring method of the circuit layer of the display screen, so that the display screen has higher light transmittance when not in use. When in use, both end faces of the display screen can display the picture normally, which can improve the user experience.

[0059] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0060] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A LED bare crystal transparent display screen, characterized in that: include: A transparent flexible substrate, the transparent flexible substrate comprising a transparent flexible substrate layer, a first circuit layer and a second circuit layer, the first circuit layer and the second circuit layer are relatively connected to two end surfaces of the transparent flexible substrate layer, the projection of the first circuit layer on the transparent flexible substrate layer is perpendicular to the second circuit layer, and the first circuit layer and the second circuit layer are enclosed to form a light-transmitting portion, a plurality of via holes are arrayed on the transparent flexible substrate layer, the first circuit layer is passed through the via holes and connected to the second circuit layer; A light-emitting protection layer, the light-emitting protection layer comprising an LED light-emitting unit and a transparent adhesive layer, the LED light-emitting unit is connected to the light-transmitting portion and is located at an end surface facing the first circuit layer, one end of the LED light-emitting unit is electrically connected to the first circuit layer, and the other end is penetrated through the via hole and electrically connected to the second circuit layer, the transparent adhesive layer is attached to both end surfaces of the transparent flexible substrate, and the transparent adhesive layer surrounds the LED light-emitting unit, the first circuit layer and the second circuit layer; The inner diameter of the via hole is larger than the line width of the first circuit layer and the second circuit layer, the inner wall of the via hole is covered with a conductive covering layer, the conductive covering layer surrounds the upper and lower end surfaces of the via hole, and the conductive covering layer is electrically connected to the first circuit layer and the second circuit layer; The light-transmitting portion includes a plurality of light-transmitting units, one end of each light-transmitting unit is connected to the first circuit layer, and the other end is connected to the second circuit layer, and the side width of each light-transmitting unit is much larger than the line width of the first circuit layer and the second circuit layer; The first circuit layer is wrapped around the LED light-emitting unit, the LED light-emitting unit includes a solder pad and a light-emitting monomer, the solder pad is arranged on the end surface of the light-transmitting unit facing the first circuit layer, and the light-emitting monomer is electrically connected to the solder pad; The LED light-emitting units are provided in a plurality of groups, and the plurality of groups of LED light-emitting units are arrayed in the light-transmitting portion. The light-emitting monomers are composed of bare crystal chips and / or CSP chips, and the transparent adhesive layer is sealed on the light-emitting monomers.

2. The LED bare crystal transparent display screen according to claim 1, characterized in that: The first circuit layer includes a plurality of groups of longitudinal conductive wires evenly spaced apart, the plurality of groups of longitudinal conductive wires cover the transparent flexible substrate layer, the ends of the longitudinal conductive wires facing away from the transparent flexible substrate are provided with a first connecting section, the first connecting section penetrates the light-emitting protective layer and is located at the outer edge of the transparent flexible substrate.

3. The LED bare crystal transparent display screen according to claim 2, characterized in that: The second circuit layer includes a plurality of groups of evenly spaced transverse conductors, the plurality of groups of transverse conductors cover the end surface of the transparent flexible substrate layer away from the longitudinal conductors, the transverse conductors are perpendicular to the longitudinal conductors, and a second connecting segment is provided at the end away from the transparent flexible substrate, the second connecting segment penetrates the light-emitting protection layer and is located at the outer edge of the transparent flexible substrate, and the first connecting segment and the second connecting segment together constitute a control connecting end.

4. The LED bare crystal transparent display screen according to claim 3, characterized in that: The outer edge of the light-emitting protection layer is covered with an insulating covering layer, the insulating covering layer covers the outer edge of the transparent flexible substrate, and the projection of the insulating covering layer on the transparent flexible substrate layer covers the first connecting section and the second connecting section.

5. The LED bare crystal transparent display screen according to claim 3, characterized in that: It also includes a signal adapter, the bottom end of the light-emitting protection layer is penetrated through the signal adapter, and the first circuit layer and the second circuit layer are electrically connected to the signal adapter.

6. The LED bare crystal transparent display screen according to claim 5, characterized in that: The signal adapter comprises: A PCB driving board, the PCB driving board is disposed through the light-emitting protection layer and is electrically connected to the control connection end; and A signal socket, wherein the signal socket is provided with a plug-in slot relative to the luminous protective layer, the plug-in slot is provided with two sets of clamping parts facing the luminous protective layer, the luminous protective layer is passed through the plug-in slot and clamped on the two clamping parts, the PCB driving board is passed through the plug-in slot and electrically connected to the signal socket.

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