Three-primary-color LED packaging structure for vehicle-mounted display

Abstract

The utility model relates to the technical field of vehicle-mounted display LED light emitting, in particular to a three-primary-color LED packaging structure for vehicle-mounted display, which comprises a PCB (printed circuit board), a plurality of LED chip components, a diffusion layer, a light emitting layer and a metal substrate, an installation groove is arranged on the PCB, each LED chip component comprises a red light LED chip, a green light LED chip and a blue light LED chip, and the metal substrate is arranged in the installation groove. The diffusion layer comprises a plurality of continuous arc-shaped diffusion surfaces, the light-emitting layer comprises a plurality of intensifying layers and light-transmitting layers, mixed light can be diffused through the diffusion layer firstly, the light-emitting range is increased, and part of the mixed light diffused by the diffusion layer is emitted through the light-transmitting layers along a normal light-emitting path; and one part of the light can be intensified and concentrated through the light intensifying layers in the gaps between the corresponding LED chip assemblies. Therefore, the problem that light emitted by the whole three-primary-color LED packaging structure for the vehicle-mounted display has shadows due to the gaps among the LED chip assemblies can be reduced, and the light emitting quality of the whole three-primary-color LED packaging structure for the vehicle-mounted display is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted display LED luminescence, in particular to a three-primary-color LED packaging structure for vehicle-mounted display. Background Art

[0002] The in-car display is a passive light-emitting element. The display itself does not emit light, but is illuminated by the backlight below it. The backlight of the liquid crystal display is composed of LED light source, reflector, and optical film.

[0003] An LED commonly used in car displays uses the three-primary color principle. By setting red, green, and blue chips and adjusting the light intensity ratio of the three chips, the color and intensity of the mixed light emitted by the three chips can be controlled. The most commonly used method is to mix the light emitted by the three chips into white light.

[0004] However, in order to increase the overall luminous efficiency, the existing three-primary-color LED packaging structure for vehicle displays usually has multiple groups of LED chip assemblies, each of which includes three types of chips. For heat dissipation considerations, there are gaps between each group of LED chip assemblies, which also results in gaps between the mixed light emitted by each group of LED chip assemblies. Ultimately, the light emitted by the entire three-primary-color LED packaging structure for vehicle displays has shadows. Utility Model Content

[0005] Based on the technical problems existing in the above-mentioned prior art, the utility model provides a three-primary-color LED packaging structure for vehicle-mounted display, which can reduce the problem of shadows in the light emitted by the entire three-primary-color LED packaging structure for vehicle-mounted display caused by the gaps between LED chip components, thereby improving the luminous quality of the entire three-primary-color LED packaging structure for vehicle-mounted display.

[0006] The utility model solves the technical problem by adopting the following technical solution: providing a three-primary-color LED packaging structure for vehicle-mounted display, comprising a PCB board, a plurality of LED chip assemblies, a diffusion layer and a light-emitting layer arranged above the LED chip assemblies, and a metal substrate connected to the PCB board, wherein the PCB board is provided with a mounting groove for accommodating the LED chip assemblies, each of the LED chip assemblies comprises a red LED chip, a green LED chip, and a blue LED chip, the red LED chip, the green LED chip, and the blue LED chip are all electrically connected to the metal substrate, the diffusion layer comprises a plurality of continuous arc-shaped diffusion surfaces, the light-emitting layer comprises a plurality of spaced-apart light-enhancing layers and a light-transmitting layer, the light-enhancing layers correspond to the gaps between adjacent LED chip assemblies, and the light-transmitting layers are arranged corresponding to the light-emitting surfaces of the LED chip assemblies, and light emitted by the red LED chip, the green LED chip, and the blue LED chip is mixed into white light, diffused by the diffusion layer, concentrated by the light-enhancing layer, and then emitted through the light-transmitting layer.

[0007] Furthermore, the curvature range of the diffusion surface is greater than or equal to the light-emitting range of the LED chip assembly.

[0008] Furthermore, the light-enhancing layer is a prism structure.

[0009] Furthermore, the top angle of the middle brightness enhancement layer is 60 degrees.

[0010] Furthermore, the red LED chip, the green LED chip and the blue LED chip are connected in a common cathode manner.

[0011] Furthermore, the red LED chip, the green LED chip and the blue LED chip are stacked in sequence, and the red LED chip, the green LED chip and the blue LED chip are bonded together by transparent curing adhesive.

[0012] Furthermore, the green LED chip is located between the red LED chip and the blue LED chip, and the red LED chip is closer to the metal substrate than the blue LED chip.

[0013] Furthermore, diffusion particles are provided in the diffusion layer.

[0014] Furthermore, the three-primary-color LED packaging structure for vehicle-mounted display further includes a packaging adhesive layer provided on the light-emitting layer.

[0015] Furthermore, a connecting hole communicating with the metal substrate is formed on the groove wall of the mounting groove, and the LED chip assembly is in contact with and connected to the metal substrate through the connecting hole.

[0016] The beneficial effects of the utility model are as follows: providing a three-primary-color LED packaging structure for vehicle-mounted display, comprising a PCB board, a plurality of LED chip assemblies, a diffusion layer and a light-emitting layer arranged above the LED chip assemblies, and a metal substrate connected to the PCB board, wherein the PCB board is provided with a mounting groove for placing the LED chip assemblies, each of the LED chip assemblies comprises a red LED chip, a green LED chip and a blue LED chip, the red LED chip, the green LED chip and the blue LED chip are all electrically connected to the metal substrate, the diffusion layer comprises a plurality of continuous arc-shaped diffusion surfaces, the The light-emitting layer includes several light-enhancing layers and light-transmitting layers arranged at intervals. The light-enhancing layers correspond to the gaps between adjacent LED chip assemblies, and the light-transmitting layers are arranged corresponding to the light-emitting surfaces of the LED chip assemblies. Light emitted by the red, green, and blue LED chips is mixed into white light, diffused through the diffusion layer, and then concentrated by the light-enhancing layer before being emitted or emitted through the light-transmitting layer. The mixed light is first diffused by the diffusion layer, increasing the luminous range. After diffusion by the diffusion layer, part of the mixed light is emitted through the light-transmitting layer along the normal luminous path, while part is concentrated by the light-enhancing layers corresponding to the gaps between the LED chip assemblies. This reduces the problem of dark shadows in the light emitted by the entire three-primary-color LED package structure for vehicle-mounted displays caused by the gaps between the LED chip assemblies, thereby improving the luminous quality of the entire three-primary-color LED package structure for vehicle-mounted displays. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] In the picture: Figure 1 This is an overall structural diagram of a three-primary-color LED packaging structure for vehicle-mounted display provided by the utility model;

[0019] Figure 2 for Figure 1 The optical path diagram of the three-primary-color LED package structure for vehicle-mounted display shown;

[0020] Figure 3 for Figure 1 The schematic diagram of the light-enhancing layer shown;

[0021] Figure 4 for Figure 1 The arrangement structure diagram of the red LED chip, green LED chip and blue LED chip in the LED chip assembly is shown.

[0022] Explanation of the accompanying reference numerals: 100, three-primary-color LED packaging structure for vehicle-mounted display; 10, PCB board; 11, mounting groove; 12, connecting hole; 20, LED chip assembly; 21, red LED chip; 22, green LED chip; 23, blue LED chip; 24, transparent curing adhesive; 30, diffusion layer; 31, diffusion surface; 40, light-emitting layer; 41, light-enhancing layer; 42, light-transmitting layer; 50, metal substrate; 60, packaging adhesive layer. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is now described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basics of the present invention in an illustrative manner, and therefore only shows the structures related to the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Please refer to Figure 1-4 A three-primary-color LED package structure 100 for an in-vehicle display includes a PCB 10, a plurality of LED chip assemblies 20, a diffusion layer 30 and a light-emitting layer 40 disposed above the LED chip assemblies 20, a metal substrate 50 connected to the PCB 10, and an encapsulation adhesive layer 60 disposed on the light-emitting layer 40. The PCB 10 and the metal substrate 50 are connected by injection molding.

[0025] The PCB board 10 is provided with a mounting groove 11 for placing the LED chip assembly 20 . The groove wall of the mounting groove 11 is provided with a connecting hole 12 connected to the metal substrate 50 . The LED chip assembly 20 is in contact with and connected to the metal substrate 50 through the connecting hole 12 .

[0026] Each LED chip assembly 20 includes a red LED chip 21, a green LED chip 22 and a blue LED chip 23. The red LED chip 21, the green LED chip 22 and the blue LED chip 23 are all electrically connected to the metal substrate 50. Specifically, in this embodiment, the red LED chip 21, the green LED chip 22 and the blue LED chip 23 are connected in common cathode.

[0027] Please refer to Figure 4Specifically, in this embodiment, the red LED chip 21, the green LED chip 22, and the blue LED chip 23 are stacked in sequence and bonded together by a transparent curing adhesive 24. The green LED chip 22 is located between the red LED chip 21 and the blue LED chip 23, and the red LED chip 21 is closer to the metal substrate 50 than the blue LED chip 23. The transparent curing adhesive 24 is made of an organic silicon polymer packaging material with repeated Si-O-Si bonds as the organic silicon backbone, and has excellent light transmittance. The connection structure between the red LED chip 21, the green LED chip 22, and the blue LED chip 23 and the metal substrate 50 is all prior art. The light intensity of the light emitted by the red LED chip 21, the green LED chip 22, and the blue LED chip 23 is controlled by PWM. The specific structure of the PWM control is prior art and will not be described in detail in this embodiment.

[0028] The diffusion layer 30 includes a plurality of continuous arc-shaped diffusion surfaces 31 , the arc range of the diffusion surface 31 being greater than or equal to the luminous range of the LED chip assembly 20 . Furthermore, in this embodiment, the arc range of the diffusion surface 31 is greater than the luminous range of a single LED chip assembly 20 .

[0029] The distance between the top of the LED chip assembly 20 and the bottom of the diffusion layer 30 is 10 mm to ensure that the light emitted by the red LED chip 21 , the green LED chip 22 and the blue LED chip 23 can be mixed into white light before reaching the diffusion layer 30 .

[0030] Diffusion layer 30 is provided with diffusion particles and is made of polyethylene terephthalate. Alternatively, the diffusion particles may be made of polystyrene microspheres, polymethyl methacrylate, or silicone microspheres. In this embodiment, the diffusion particles are made of polystyrene microspheres. Optionally, the distance between the diffusion particles is 1 to 5 microns.

[0031] The light-emitting layer 40 includes several light-enhancing layers 41 and light-transmitting layers 42 arranged at intervals. The light-enhancing layers 41 correspond to the gaps between adjacent LED chip assemblies 20, and the light-transmitting layers 42 are arranged corresponding to the light-emitting surfaces of the LED chip assemblies 20. The light emitted by the red LED chip 21, the green LED chip 22 and the blue LED chip 23 is mixed into white light and diffused through the diffusion layer 30. It is then concentrated through the light-enhancing layer 41 and emitted or emitted through the light-transmitting layer 42.

[0032] Brightness-enhancing layer 41 has a prism structure. Upon entering this layer, light is focused by the prism, which focuses the originally wide-angle divergent light within a specific angle range, thereby increasing brightness within a fixed range. Specifically, in this embodiment, the vertex angle of brightness-enhancing layer 41 is 60 degrees. Brightness-enhancing layer 41 is made of a composite of highly transparent polyethylene terephthalate plastic and acrylic resin. Light-transmitting layer 42 is made of polymethyl methacrylate.

[0033] In some embodiments, optionally, the size of the light-transmitting layer 42 is greater than or equal to the size of the luminous pixel area of the LED light-emitting layer in the LED chip assembly 20, that is, the size of the light-transmitting layer 42 is not less than the size of the luminous pixel area of the LED light-emitting layer in the LED chip assembly 20. Specifically, the size of the light-transmitting layer 42 is 0.05nm-0.1nm larger than the size of the luminous pixel area of the LED light-emitting layer in the LED chip assembly 20, that is, the size of the light-transmitting layer 42 is 0.025nm-0.05nm larger on one side than the size of the luminous pixel area of the LED light-emitting layer in the LED chip assembly 20.

[0034] The beneficial effect of the present invention is that the light emitted by the red LED chip 21, the green LED chip 22, and the blue LED chip 23 is mixed into white light, diffused by the diffusion layer 30, and then concentrated by the light-enhancing layer 41 before being emitted or emitted through the light-transmitting layer 42. The mixed light is first diffused by the diffusion layer 30, increasing the luminous range. After diffusion by the diffusion layer 30, part of the mixed light is emitted along the normal luminous path through the light-transmitting layer 42, and part is enhanced and concentrated by the light-enhancing layer 41 corresponding to the gaps between the LED chip assemblies 20. This can reduce the problem of shadows in the light emitted by the entire three-primary-color LED package structure 100 for vehicle-mounted display caused by the gaps between the LED chip assemblies 20, thereby improving the luminous quality of the entire three-primary-color LED package structure 100 for vehicle-mounted display.

[0035] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal communication between two components or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to 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.

[0037] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the scope of the present invention. The technical scope of this utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A three-primary-color LED package structure for vehicle-mounted display, characterized in that: The invention comprises a PCB board, a plurality of LED chip assemblies, a diffusion layer and a light-emitting layer arranged above the LED chip assemblies, and a metal base plate connected to the PCB board. The PCB board is provided with a mounting groove for placing the LED chip assemblies. Each of the LED chip assemblies comprises a red LED chip, a green LED chip, and a blue LED chip. The red LED chip, the green LED chip, and the blue LED chip are all electrically connected to the metal base plate. The diffusion layer comprises a plurality of continuous arc-shaped diffusion surfaces. The light-emitting layer comprises a plurality of spaced-apart light-enhancing layers and a light-transmitting layer. The light-enhancing layers correspond to the gaps between adjacent LED chip assemblies. The light-transmitting layers are arranged corresponding to the light-emitting surfaces of the LED chip assemblies. Light emitted by the red LED chip, the green LED chip, and the blue LED chip is mixed into white light, diffused through the diffusion layer, concentrated through the light-enhancing layer, and then emitted through the light-transmitting layer.

2. The three-primary-color LED package structure for vehicle-mounted display according to claim 1, characterized in that: The curvature range of the diffusion surface is greater than or equal to the light emitting range of the LED chip assembly.

3. The three-primary-color LED package structure for vehicle-mounted display according to claim 2, characterized in that: The light-enhancing layer is a triangular prism structure.

4. The three-primary-color LED package structure for vehicle-mounted display according to claim 3, characterized in that: The top angle of the light-enhancing layer is 60 degrees.

5. The three-primary-color LED package structure for vehicle-mounted display according to claim 4, characterized in that: The red LED chip, the green LED chip and the blue LED chip are connected in a common cathode manner.

6. The three-primary-color LED package structure for vehicle-mounted display according to claim 5, characterized in that: The red LED chip, the green LED chip and the blue LED chip are stacked in sequence, and the red LED chip, the green LED chip and the blue LED chip are bonded together by transparent curing adhesive.

7. The three-primary-color LED package structure for vehicle-mounted display according to claim 6, characterized in that: The green LED chip is located between the red LED chip and the blue LED chip, and the red LED chip is closer to the metal substrate than the blue LED chip.

8. The three-primary-color LED package structure for vehicle-mounted display according to claim 7, characterized in that: Diffusion particles are arranged in the diffusion layer.

9. The three-primary-color LED package structure for vehicle-mounted display according to claim 8, characterized in that: The three-primary-color LED packaging structure for vehicle-mounted display further includes a packaging adhesive layer disposed on the light-emitting layer.

10. The three-primary-color LED package structure for vehicle-mounted display according to claim 9, characterized in that: A connecting hole communicating with the metal substrate is formed on the groove wall of the mounting groove, and the LED chip assembly contacts and is connected to the metal substrate through the connecting hole.

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