Multi-light-area surface light source and car light module

Abstract

The present invention relates to a multi-light-emitting area surface light source and a vehicle light module, wherein the multi-light-emitting area surface light source comprises a circuit board; an LED lamp, which is arranged on the circuit board; a reflector grille, which is arranged on the circuit board, and the reflector grille comprises a plurality of phase-separated areas, wherein an LED lamp is arranged at the center of each area, each LED lamp is independently controlled, and the optical center distance L between two adjacent LED lamps and the height H of the reflector grille satisfy the formula: L / H=tan(δ / 2), wherein δ is the light output angle of the LED lamp after passing through a diffusion film; the diffusion film is arranged on the reflector grille and covers the LED lamp. The multi-light-emitting area surface light source provided in the present application can realize the conversion from a point light source to a surface light source with the least number of LED lamps, and the lighting and extinguishing of the LED lamp in each light-emitting area can be independently controlled, thus realizing the pixelated surface light source effect very economically; a thin diffusion film is adopted, and no additional diffusant or an internal light distribution mirror mixed with a diffusant material is required, so that a better light uniformity effect can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile engineering, and in particular to a multi-light-emitting area surface light source and a vehicle lamp module. Background Art

[0002] As the preferred light source for car signal lights, LEDs have been widely and maturely used in car signal lights with various functions. However, when LEDs are used as point light sources in signal lights with a certain function in car rear lights, multiple LEDs are generally required to achieve one function. The lighting effect of multiple LEDs is difficult to achieve good lighting uniformity without a good optical reflection system and the use of a light distribution mirror.

[0003] On the other hand, with the popularization of LED light sources in car lamp applications and the increasingly miniaturized design of LED light sources, people have also put forward higher requirements for the visual effects of car lamps, such as designing car lamps into a "projection screen". Through the compact array arrangement of these miniaturized LED particles, LED lamps can be designed into a screen with imaging function, hoping to achieve diversified display effects through this screen, including: basic symbol display, text display, dynamic effects, etc.

[0004] With the deepening of intelligent driving and in-car entertainment, people have also put forward higher requirements for the interactivity of car lights. With the progress of the times, car lights have posed greater challenges to aesthetics and functionality. On the one hand, people are no longer satisfied with the traditional LED car lights with LED point light sources, and hope to replace the original point light source with a softer surface light source; on the other hand, with the rapid development of information technology and the development direction of the new four modernizations of "electrification, networking, intelligence, and sharing", new requirements for "information display and intelligent interactivity" have been put forward for car lights. Car lights are no longer limited to the original lighting function, but provide people with a more interactive way of information. Summary of the invention

[0005] Based on this, it is necessary to provide a multi-light-emitting area surface light source to solve the problem of how to use point light source LED particles to achieve the surface light source effect of car lights while also having the function of displaying different information interactions.

[0006] A multi-light-emitting area surface light source comprises a circuit board; an LED lamp, the LED lamp is arranged on the circuit board; a reflector grid, the reflector grid is arranged on the circuit board, the reflector grid comprises a plurality of separated areas, an LED lamp is arranged at the center of each area, each LED lamp is independently controlled, and the optical center distance L between two adjacent LED lamps and the height H of the reflector grid satisfy the formula: L / H=tan(δ / 2), wherein δ is the light output angle of the LED lamp after passing through a diffusion film; the diffusion film is arranged on the reflector grid and covers the LED lamp.

[0007] Furthermore, the diffusion film angle α of the diffusion film, the light source angle β of the LED lamp, and the light output angle δ of the LED lamp satisfy the formula: α 2 +β 2 =δ 2 .

[0008] Furthermore, a shielding texture is provided on the surface of the diffusion film, and the shielding texture is used to shield the contour line of the reflector grid.

[0009] Furthermore, the masking texture includes printing a corresponding contour shape according to the cross-sectional shape of the reflector grid, and filling the contour shape with a solid color, wherein the contour shape has the same color as the circuit board.

[0010] Furthermore, the diffusion film and the reflector grid are connected by laser welding.

[0011] Furthermore, a metal coating is provided inside a plurality of regions of the reflector grid, and the end surface of the reflector grid combined with the diffusion film and the circuit board maintains the raw material color of the reflector grid.

[0012] Furthermore, it also includes a shell, the shell is connected to the circuit board, and the diffusion film is pressed onto the reflector grid through the shell.

[0013] Furthermore, the circuit board is staggered with protrusions and grooves along each edge, and the shell is staggered with card joints and card grooves on a side opposite to the circuit board, the protrusions are matched with the card grooves, and the grooves are matched with the card joints.

[0014] Furthermore, the plurality of LED lamps are connected in a common anode or common cathode manner.

[0015] Furthermore, the size of the LED lamp is less than 2 mm×2 mm, and the light intensity of the LED lamp is strong at the periphery and weak at the center.

[0016] The multi-light-emitting area surface light source provided by the present application includes a circuit board, an LED lamp, a reflector grille and a diffusion film, wherein the LED lamp is welded on the circuit board, the reflector grille is arranged on the circuit board, and a plurality of phase-separated areas are arranged on the circuit board, an LED lamp is arranged in the center of each area, each LED lamp is independently controlled, and a single LED lamp is isolated by the reflector grille, and the light reflection in a single area can be enhanced; in addition, in order to ensure that each LED lamp has a good surface light source luminous effect, it is determined through repeated experiments that different LED lamps need to be configured with reflector grilles with different heights, and the height is related to the spacing between two adjacent LED lamps and the light output angle of the LED lamp; finally, a diffusion film is laid on the side of the reflector grille away from the circuit board, and an optical pattern is arranged on the diffusion film, and the light of the LED lamp is scattered on the optical pattern, and combined with the reflection effect of the reflector grille, the light emitted by the multi-light-emitting area surface light source provided by the present application is uniform and soft. The present application solves how to use traditional LED point light sources to economically and simply achieve beautiful surface light source effects, while enabling the surface light source to perform multi-region pixelated light-emitting area segmentation and independent control of each light-emitting area, so that it meets the interactive needs of users.

[0017] Furthermore, the present application provides a vehicle light module, which is composed of the multi-light-emitting area surface light source described above, the LED lamp is welded to the circuit board, and the reflector grille is riveted to the circuit board.

[0018] The vehicle light module provided by the present application is composed of the multi-light-emitting area surface light source provided by the present application, wherein the multi-light-emitting area surface light source has different appearance structures, and the vehicle light module can also be spliced ​​by multiple multi-light-emitting area surface light sources with different structures, thereby forming various vehicle lights with different structural forms. Each light-emitting area on the multi-light-emitting area surface light source can be defined as a pixel, and multiple light-emitting areas can be defined as multiple pixels, and each pixel can be controlled independently. The vehicle light module composed of the multi-light-emitting area surface light source can realize pixel element display, dynamic, character and other applications, so that the vehicle light module has the function of interactively displaying information, and can be used in the automotive vehicle light industry with personalized needs, especially in the field of signal lights, to meet the interactive needs of future smart vehicle lights. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a multi-light-emitting area surface light source according to an embodiment of the present application;

[0020] Figure 2 An exploded diagram of a multi-light-emitting area surface light source according to an embodiment of the present application;

[0021] Figure 3 A light intensity distribution diagram of the LED lamp selected for the multi-light-emitting area surface light source of an embodiment of the present application;

[0022] Figure 4 A cross-sectional view of a multi-light-emitting area surface light source according to an embodiment of the present application;

[0023] Figure 5 A schematic diagram showing the relationship between light emission angles of a multi-light emitting area surface light source according to an embodiment of the present application;

[0024] Figure 6 A common cathode circuit connection diagram of each LED lamp in a multi-light-emitting area surface light source according to an embodiment of the present application;

[0025] Figure 7 A common anode circuit connection diagram of each LED lamp in a multi-light-emitting area surface light source according to an embodiment of the present application;

[0026] Figure 8 A three-dimensional diagram of a reflector grid of a multi-light-emitting area surface light source according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0033] Figure 1 A front view of a multi-light-emitting area surface light source according to an embodiment of the present application is shown. Figure 2 An exploded diagram of a multi-light-emitting area surface light source according to an embodiment of the present application is shown. Figure 1 , Figure 2As shown, the multi-light-emitting area surface light source provided by the present application includes an LED lamp 1, a reflector grille 2, a diffusion film 3, a shell 4, a circuit board 5 and a flexible board connector 6, wherein the LED lamp 1 and the flexible board connector 6 are fixedly mounted on the circuit board 5, and the circuit board 5 is connected to the external power supply through the flexible board connector 6. The reflector grille 2 is arranged on the circuit board 5, and includes a plurality of areas 21 thereon, and the plurality of areas 21 are separated from each other. Preferably, an LED lamp 1 is correspondingly installed at the geometric center of each area 21, and each LED lamp is independently controlled. The diffusion film 3 is installed on the reflector grille 2 and covers the LED lamp 1, so that the light emitted by the LED lamp 1 is reflected by the reflector grille 2 and scattered by the diffusion film 3 to become a more uniform light. The shell 4 is connected to the circuit board 5, so as to encapsulate the LED lamp 1, the reflector grille 2 and the diffusion film 3, and at the same time enable the diffusion film 3 to be tightly pressed on the reflector grille 2 to enhance its scattering effect on light. When choosing the model of LED lamp, it is necessary to choose a type with strong light intensity around and weak light intensity in the center, and its light intensity distribution needs to refer to Figure 3 The light intensity distribution diagram of the selected LED lamp of the multi-light-emitting area surface light source of one embodiment of the present application is shown. In addition, the selection of the size of the LED lamp is preferably less than or equal to 2mm×2mm LED lamp beads to minimize the size of a single pixel of the surface light source, making the display pixel smaller and more refined.

[0034] Furthermore, a plurality of positioning holes 52 are provided on the circuit board 5. The positioning holes 52 are small mechanical holes without electrical polarity. The positioning holes 52 are used to position and install the reflector grille 2. A plurality of support columns 22 are provided on the side where the reflector grille 2 is combined with the circuit board 5. The support columns 22 are perpendicular to the plane where the circuit board 5 is located, and the length of the support columns 22 is greater than the thickness of the circuit board 5 by 1mm-2mm. The plurality of support columns 22 are aligned with the positioning holes 52 on the circuit board 5 and inserted into the positioning holes 52. After the support columns 22 pass through the circuit board 5, the ends of the support columns 22 extend out of the circuit board 5 by a certain length. The ends of the support columns 22 are riveted and fixed to the circuit board 5 by hot stamping.

[0035] Further, the circuit board 5 is provided with a plurality of connection parts circumferentially along the plane where the circuit board 5 is located, and the connection parts are used to be matched and connected with the housing 4. Preferably, the connection parts are protrusions 511 and grooves 512 staggeredly arranged along each edge of the circuit board 5, and correspondingly, the housing 4 is provided with a clamping joint 411 and a clamping groove 412 staggeredly arranged along each edge of the circumferential side opposite to the circuit board 5, the protrusion 511 on the circuit board 5 is matched and connected with the clamping groove 412 on the housing 4, and the groove 512 on the circuit board 5 is matched and connected with the clamping joint 411 on the housing 4, so that the LED lamp 1 is confined in the assembly composed of the housing 1 and the circuit board 5. Preferably, the height of the housing 4 is designed to be the sum of the heights of the diffusion film 3 and the reflector grille 2, so that the top surface of the housing 4 is zero-fit with the diffusion film 3 and the reflector grille 2.

[0036] It should be noted that the assembly of the housing 4 and the circuit board 5 is completed by the protrusion 511 on the circuit board 5 and the card slot 412 on the housing 4, and the groove 512 on the circuit board 5 and the card joint 411 on the housing 4. This is only a preferred embodiment of the present application. This method can tightly confine the diffusion film 3 between the reflector grid 2 and the housing 4 to achieve the purpose of tight fixation. However, other types of connection methods are allowed by the present application as long as they can realize the assembly of various components of the multi-light-emitting area surface light source and make the diffusion film 3 fit tightly on the reflector grid 2.

[0037] Figure 4 This is a cross-sectional view of a multi-light-emitting area surface light source according to an embodiment of the present application, combined with Figure 1 , Figure 2 As shown, the reflector grid 2 divides the entire outer frame into multiple areas 21 with equal areas according to a certain special pixel shape. Each area 21 is independent of each other. The independent area 21 contains an LED lamp 1. Preferably, the optical center of the LED lamp 1 coincides with the geometric center of the bottom surface shape of the independent area 21. The size of the area 21 needs to be larger than the size of the LED lamp 1 and leave enough wiring margin. The LED lamp 1 in each area 21 can be controlled independently. Figure 4 As shown, the optical center distance between two adjacent LED lamps 1 is L, the angle of the light emitted by the LED lamp 1 after passing through the diffusion film 3 is defined as the light output angle δ, and the height H of the reflector grille 2 and the distance L satisfy the following formula relationship: L / H=tan(δ / 2), thereby ensuring that the light emitted by the LED lamp 1 forms a better and uniform surface light source after being reflected by the reflector grille 2 and scattered by the diffusion film 3.

[0038] Preferably, the thickness of the diffusion film 3 is between 0.1 mm and 1 mm, and its constituent materials include but are not limited to PC (polycarbonate), PET (polybutadiene glycol ester) and PE (polyethylene plastic). The diffusion film 3 is welded to the upper surface of the reflector grid 2 by laser welding to achieve the effect of zero adhesion and zero fixation between the diffusion film 3 and the upper surface of the reflector grid 2. Preferably, the transmittance of the diffusion film 3 is between 85% and 96%. The diffusion film 3 is designed with extremely small optical patterns to diffuse the light emitted by the LED lamp 1 to achieve the effect of uniform light. It should be noted that a hard thin plastic sheet made of PC (polycarbonate) or PMMA (polymethyl methacrylate) material mixed with a scattering agent (diffuser) can also replace the role of the diffusion film with an optical pattern. After passing through the diffusion film 3, the light will pass through the medium with different refractive indices, causing many refractions, reflections and scattering phenomena of the light, thereby correcting the light into a uniform surface light source to achieve the effect of optical diffusion.

[0039] Further, Figure 5The schematic diagram shows the relationship between the light-emitting angles of the multi-light-emitting area surface light source of an embodiment of the present application. Assume that the chamfer of the tiny pattern on the surface of the diffusion film 3 is defined as the diffusion film angle α, the light-emitting angle of the LED lamp 1 itself is defined as the light source angle β, and the angle of the light emitted by the LED lamp 1 after passing through the diffusion film 3 is defined as the light-emitting angle δ. The above three angles satisfy the following relationship: α 2 +β 2 =δ 2 In order to make the reflector grille 2 have better grille concealment when the LED lamp 1 is not turned on, that is, the outline of the reflector grille 2 cannot be seen by naked eyes, a shielding texture for shielding the outline of the reflector grille 2 can be provided on the surface of the diffusion film 3. The shielding texture includes printing the corresponding outline shape according to the cross-sectional shape of the reflector grille 2 with ink, and filling the outline shape with solid color. The color of the outline shape is the same as the color of the circuit board 5, so as to provide better shielding for the reflector grille 2.

[0040] The diffusion film provided in the present application adopts a thin and light micro-patterned diffusion film, which realizes light diffusion through micro-patterns. It does not require additional diffusers or internal light distribution mirrors mixed with diffuser materials, and can achieve better light uniformity effect. The transmittance of the diffusion film is much higher than that of the internal light distribution mirrors mixed with diffuser materials, and it makes more efficient use of light energy, saves energy and reduces emissions. Diffusion films designed with different patterns can achieve different light diffusion angles, which are suitable for different application scenarios.

[0041] Figure 6 The figure shows a common cathode circuit connection diagram of each LED lamp in a multi-light-emitting area surface light source according to an embodiment of the present application. Figure 7 The common anode circuit connection diagram of each LED lamp in a multi-light-emitting area surface light source according to an embodiment of the present application is shown. Figure 6 , Figure 7 As shown, the circuit board 5 is provided with a soldering pad of the LED lamp 1 and a soldering pad of the soft board connector 6, and the LED lamp 1 and the soft board connector 6 are soldered on the circuit board 5. The anode and cathode of a single LED lamp 1 in each small light-emitting area 21 are respectively led out to each PIN of the soft board connector 6 through the routing designed on the circuit board 5. The electrical connection structure of n LED lamps 1 in n light-emitting areas can be adopted Figure 5 The common cathode circuit connection method shown is that all cathodes of n LED lamps are connected in parallel; you can also use Figure 6 The common anode circuit connection method shown is that all anodes of n LED lamps are connected in parallel, so as to realize independent control of each LED lamp. Further, the material of the circuit board 5 includes but is not limited to an aluminum substrate, an FR4 board (epoxy glass cloth laminate), and the color can be white, red, black, yellow, etc., designed according to actual needs.

[0042] Preferably, the wall thickness of the shell 4 is between 1 mm and 5 mm, and its constituent materials include but are not limited to PC (polycarbonate) or PMMA (polymethyl methacrylate). At the same time, according to the needs of its actual application scenario, the shell 4 of different colors can be selected, so that the lamp housing composed of the shell 4 has different colors, such as the tail lamp can be made of red, light pink, yellow or white transparent material, and the front lamp can be made of white or yellow transparent material.

[0043] Figure 8 A stereoscopic diagram of a reflector grid of a multi-light-emitting area surface light source according to an embodiment of the present application is shown, combined with Figure 1-Figure 8 As shown, preferably, the reflector grid 2 evenly divides the entire surface light source area into n small light-emitting areas 21 of equal area, named S1, S2, S3, ..., Sn, and an LED lamp 1 is placed on the circuit board 5 at the bottom of each small light-emitting area 21, and the optical center position of the LED lamp 1 coincides with the geometric center of the shape of the area 21. It should be noted that the reflector grid 2 provided in the present application is preferably a regular hexagonal structure, and the multiple areas 21 distributed thereon are equilateral triangle structures, but it does not mean that the reflector grid 2 and the multiple areas 21 distributed thereon are limited to this structure. Other types of structures, such as triangles, squares, parallelograms, regular hexagons, etc., are all allowed by the present application, and technicians can set the appropriate reflector grid 2 and area 21 structure according to the actual effect required.

[0044] Preferably, the reflector grille 2 can be made of red, white, or black opaque PC material, and its side is covered with a metal coating. It should be noted that the end surface of the reflector grille 2 combined with the diffusion film 3 and the circuit board 5 is prohibited from being covered with a metal coating to maintain the raw material color of the reflector grille 2. On the one hand, it can prevent short circuits between the traces on the bottom circuit board 5; on the other hand, it cooperates with the diffusion film 3 to make the dividing line of the multiple light-emitting areas 21 unclear when the LED lamp 1 is not lit. Preferably, the metal coating is an aluminum layer, and the reflector grille 2 can be fully or partially aluminum-plated to enhance the reflection of the light of the LED lamp 1 in a single small light-emitting area 21. The inner sidewalls of each small light-emitting area 21 are all aluminum-plated, which helps to improve the reflection of the light of the LED lamp 1 in the area 21, enhance the brightness, and form a high contrast between the light-emitting area and the dark area of ​​the grid outline that is not lit.

[0045] The multi-light-emitting area surface light source provided by the present application includes a circuit board, an LED lamp, a reflector grille and a diffusion film, wherein the LED lamp is welded on the circuit board, the reflector grille is arranged on the circuit board, and a plurality of phase-separated areas are arranged on the circuit board, an LED lamp is arranged in the center of each area, each LED lamp is independently controlled, and a single LED lamp is isolated by the reflector grille, and the light reflection in a single area can be enhanced; in addition, in order to ensure that each LED lamp has a good surface light source luminous effect, it is determined through repeated experiments that different LED lamps need to be configured with reflector grilles with different heights, and the height is related to the spacing between two adjacent LED lamps and the light output angle of the LED lamp; finally, a diffusion film is laid on the side of the reflector grille away from the circuit board, and an optical pattern is arranged on the diffusion film, and the light of the LED lamp is scattered on the optical pattern, and combined with the reflection effect of the reflector grille, the light emitted by the multi-light-emitting area surface light source provided by the present application is uniform and soft. The present application solves how to use traditional LED point light sources to economically and simply achieve beautiful surface light source effects, while enabling the surface light source to perform multi-region pixelated light-emitting area segmentation and independent control of each light-emitting area, so that it meets the interactive needs of users.

[0046] Furthermore, the present application provides a vehicle lamp module, which is composed of the above-mentioned multi-light-emitting area surface light source, the LED lamp is welded to the circuit board, and the reflector grille is riveted to the circuit board. The vehicle lamp module can be composed of one or more Figure 1 The multi-light-emitting area surface light source shown is composed of, preferably, each multi-light-emitting area surface is a regular hexagon, on which 96 independently controllable LED lights are evenly distributed, which can realize the conversion of point light source to surface light source with a minimum of LED lights, and only one LED lamp is required in each independent light-emitting area to achieve a very uniform surface light source effect, and the lighting and extinguishing of the LED lights in each small light-emitting area can be independently controlled, thereby facilitating the improvement of the interactive effect of the car lights and reducing the production cost of the smart car lights.

[0047] The headlight provided by the present application is composed of the multi-light-emitting area surface light source provided by the present application, wherein the multi-light-emitting area surface light source has different appearance structures, and the headlight module can also be spliced ​​by multiple multi-light-emitting area surface light sources with different structures, so as to form various headlights with different structural forms. Each light-emitting area on the multi-light-emitting area surface light source can be defined as a pixel, and multiple light-emitting areas can be defined as multiple pixels, and each pixel can be controlled independently. The headlight module composed of the multi-light-emitting area surface light source can realize pixel element display, dynamic, character and other applications, so that the headlight module has the function of interactively displaying information, which can be used in the automotive headlight industry with personalized needs, especially in the field of signal lights, to meet the interactive needs of future smart headlights.

[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A multi-light-emitting area surface light source, characterized in that: include: Circuit boards; An LED lamp, wherein the LED lamp is arranged on the circuit board; A reflector grid, wherein the reflector grid is arranged on the circuit board, the reflector grid comprises a plurality of phase-separated regions, an LED lamp is arranged at the center of each region, each LED lamp is independently controlled, and the optical center distance L between two adjacent LED lamps and the height H of the reflector grid satisfy the formula: L / H=tan(δ / 2), wherein δ is the light output angle of the LED lamp after passing through the diffusion film; The diffusion film is arranged on the reflector grid and covers the LED lamp; The chamfer of the tiny pattern on the surface of the diffusion film is the diffusion film angle α, and the light-emitting angle of the LED lamp itself is the light source angle β; The diffusion film angle α of the diffusion film, the light source angle β of the LED lamp, and the light output angle δ of the LED lamp satisfy the formula: α 2 +β 2 =δ 2 ; The plurality of LED lamps are connected in a common anode or common cathode manner.

2. The multi-light emitting area surface light source according to claim 1, characterized in that: The surface of the diffusion film is provided with a shielding texture, and the shielding texture is used to shield the outline of the reflector grid.

3. The multi-light emitting area surface light source according to claim 2, characterized in that: The masking texture includes printing a corresponding contour shape according to the cross-sectional shape of the reflector grid and filling the contour shape with a solid color, wherein the contour shape has the same color as the circuit board.

4. The multi-light-emitting area surface light source according to claim 1, characterized in that: The diffusion film is connected to the reflector grid by laser welding.

5. The multi-light emitting area surface light source according to claim 1, characterized in that: A metal coating is disposed inside a plurality of regions of the reflector grid, and an end surface of the reflector grid combined with the diffusion film and the circuit board maintains the raw material color of the reflector grid.

6. The multi-light-emitting area surface light source according to any one of claims 1 to 5, characterized in that: It also includes a shell, which is connected to the circuit board, and the diffusion film is pressed onto the reflector grid through the shell.

7. The multi-light-emitting area surface light source according to claim 6, characterized in that: The circuit board is staggered with protrusions and grooves along each edge, and the shell is staggered with card joints and card grooves on a side opposite to the circuit board, the protrusions are matched with the card grooves, and the grooves are matched with the card joints.

8. The multi-light emitting area surface light source according to claim 1, characterized in that: The size of the LED lamp is less than 2 mm×2 mm, and the light intensity of the LED lamp is strong at the periphery and weak at the center.

9. A vehicle light module, characterized in that: The vehicle light module is composed of the multi-light-emitting area surface light source according to any one of claims 1 to 8, the LED lamp is welded to the circuit board, and the reflector grille is riveted to the circuit board.

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