Light source structure, vehicle lamp and vehicle

Abstract

The utility model provides a light source structure, a vehicle lamp and a vehicle. The light source structure comprises a display unit which comprises a light emitting side and a backlight side; the scattering structure covers the surface of the light emitting side of the display unit; the scattering structure comprises a scattering layer and a high-arch protruding part, the scattering layer and the high-arch protruding part are sequentially arranged in the direction gradually away from the display unit, the middle area of the top surface of the high-arch protruding part protrudes, and the thickness H of the scattering layer ranges from 0.3 mm to 0.8 mm.

Description

Technical Field

[0001] The present application relates to the field of vehicle lighting technology, and in particular to a light source structure, a vehicle lamp and a vehicle. Background Art

[0002] With the technological advancement of automotive lighting, as an important part of safety and aesthetics, the technological development of automotive lighting has gone through multiple stages. Traditional lighting systems are usually designed based on a single light source and reflection system, but with the development of technology, more complex and efficient optical systems have emerged. In recent years, the integration of screen technology MDL (Micro display lighting) has provided new possibilities for lighting systems, especially in terms of light control and dynamic display.

[0003] Conventional screen systems only use conventional LEDs currently in mass production to display images with high clarity. However, the light source used by current technology has low lighting saturation and high contrast, and there are certain defects in the lighting effect. In addition, the human eye is very prone to fatigue when observing screen animations for a long time. Utility Model Content

[0004] In order to solve the above problems, the technical solutions adopted in the embodiments of the present application are as follows:

[0005] A light source structure, comprising:

[0006] A display unit, comprising a light emitting side and a backlight side;

[0007] A scattering structure is covered on the light-emitting side surface of the display unit; the scattering structure comprises a scattering layer and a high-arched protrusion, the scattering layer and the high-arched protrusion are arranged in sequence in a direction gradually away from the display unit, and the middle area of ​​the top surface of the high-arched protrusion is raised, and the thickness H of the scattering layer is 0.3mm-0.8mm.

[0008] As an optional implementation, in the embodiment of the utility model, the top surface of the high arch protrusion is a spherical surface.

[0009] As an optional implementation, in the embodiment of the utility model, the distance between the top surface of the high arch protrusion and the surface of the display unit is A, wherein the value range of A is 0.1 mm-0.3 mm.

[0010] As an optional implementation, in the embodiment of the utility model, the transmittance of the glue layer of the scattering layer is in the range of 10%-30%.

[0011] As an optional implementation, in an embodiment of the utility model, there are multiple light source structures, which are arranged in an array in the vertical and horizontal directions.

[0012] As an optional implementation, in the embodiment of the utility model, the display unit includes:

[0013] substrate;

[0014] A display chip is disposed on the surface of the substrate;

[0015] An isolation protector, covering the surface of the display chip to isolate the display chip from the outside world;

[0016] The peripheral support is arranged on the surface of the substrate and on the periphery of the isolation protection body.

[0017] As an optional implementation, in the embodiment of the utility model, the isolation protection body is epoxy resin or silica gel, which is mixed with one or more of scattering particles, red phosphor, yellow phosphor, and green phosphor.

[0018] As an optional implementation, in the embodiment of the utility model, the isolation protection body is integrally formed on the surface of the display chip, and can also be directly formed in the peripheral bracket.

[0019] A vehicle lamp comprises any one of the light source structures described.

[0020] The present application also discloses a vehicle, comprising the vehicle lamp described in the aforementioned embodiment.

[0021] In this embodiment, after the scattering layer is set, after the light is emitted from the display unit, it is diffusely scattered inside the scattering layer, which can improve the uniformity of the brightness displayed on the surface of the light source structure. The difference between the light intensity brightness perpendicular to the surface of the display chip and the light intensity brightness in other angle areas other than perpendicular to the surface of the display chip is significantly reduced. The surface display effect of the entire scattering structure is uniform and the central luminous bright spot is weakened, thereby improving the overall display fullness and reducing the contrast. The luminous lighting effect is better when applied to car lights, and the human eye feels softer after being applied to the screen to form a pattern.

[0022] The high-arched protrusion of the scattering structure is arranged on the side of the scattering layer away from the display unit, so that the optical path of the light in the central area of ​​the display unit is significantly longer, and the brightness of the light emitted from the top surface of the high-arched protrusion corresponding to the area directly above the display chip decreases, so that the lighting brightness of the area directly above the display chip is significantly reduced, reducing the difference in light intensity with other angle areas other than the angle perpendicular to the chip, further reducing the central luminous brightness, and completely eliminating the bright spots, so that the overall lighting fullness of the light emitting surface of the light source structure is higher, the light is more uniform, and the lighting effect is better when applied to car lights.

[0023] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A state diagram of lighting a light source used in the prior art;

[0026] Figure 2 The surface brightness distribution of the light source used in the prior art;

[0027] Figure 3 A cross-sectional view of a light source structure (excluding the high arched protrusion) provided in one embodiment of the present application;

[0028] Figure 4 for Figure 3 A lighting state diagram of the provided light source structure;

[0029] Figure 5 for Figure 3 The surface brightness distribution of the provided light source structure;

[0030] Figure 6 A cross-sectional view of a light source structure (including a high arched protrusion) provided in one embodiment of the present application;

[0031] Figure 7 for Figure 6 A lighting state diagram of the provided light source structure;

[0032] Figure 8 for Figure 6 The surface brightness distribution of the provided light source structure;

[0033] In the figure:

[0034] 10. display unit; 110. substrate; 120. display chip; 130. isolation protection body; 140. peripheral bracket; 150. bonding wire;

[0035] 20. Scattering structure; 210. Scattering layer; 220. High-arch protrusion. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0038] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0040] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0042] The present application provides a light source structure, comprising:

[0043] The display unit 10 includes a light emitting side and a backlight side;

[0044] The scattering structure 20 covers the light-emitting side surface of the display unit 10; the scattering structure 20 includes a scattering layer 210 and a high-arched protrusion 220, the scattering layer 210 and the high-arched protrusion 220 are arranged in sequence in a direction gradually away from the display unit 10, and the middle area of ​​the top surface of the high-arched protrusion 220 is raised, and the thickness H of the scattering layer 210 is 0.3mm-0.8mm.

[0045] When using traditional automotive-grade LEDs as the light source for car lights, Figure 1 As shown, there is an obvious bright spot in the center, which makes the highlight area of ​​a single display unit 10 too small and too concentrated when observed, and the brightness in the middle is too high (such as Figure 2 , the brightness value of the middle part of the light source can reach 5.5*10 6 cd / m 2 ), the brightness value of the peripheral area is extremely small, and the brightness difference with the central area is extremely large, and the diameter of the high-brightness area is about 0.2mm, the brightness is very concentrated, and the overall lighting effect is poor. The applicant found that the root cause is that the display chip 120 at the center of the light source is extremely small, and the light intensity of the display chip 120 at an angle perpendicular to the display chip 120 is the largest, so a bright spot is formed in the center of the display unit 10, and the light intensity at other angles is lower, causing the human eye to observe the central optical center while the surrounding chip edges are darker, the luminous fullness is very low, and the contrast is high. Therefore, the human eye is very easy to fatigue when observing screen animations for a long time, and the lighting effect is poor.

[0046] In this embodiment, reference Figure 3 After the scattering layer 210 is provided, after the light is emitted from the display unit 10, it is diffusely scattered inside the scattering layer 210, which can improve the uniformity of the light displayed on the surface of the light source structure (such as Figure 4 ), the difference between the light intensity brightness perpendicular to the surface of the display chip 120 and the light intensity brightness in other angle areas other than perpendicular to the surface of the display chip 120 is significantly reduced (e.g. Figure 5 , the brightness value of the middle part of the light source is reduced to 1.0*10 6 cd / m 2 ), the surface display effect of the entire scattering structure 20 is uniform, and the central luminous bright spot is weakened; and the diameter of the high-brightness area in the middle is increased to more than 0.3mm, and the area of ​​the high-brightness area is increased, thereby improving the lighting fullness of the overall display and reducing the contrast. When applied to car lights, the luminous lighting effect is better, and after being applied to the screen to form a pattern, the human eye feels softer.

[0047] In particular, the thickness of the scattering layer 210 has a great influence on the light path. If the thickness H is less than 0.3 mm, the diffusion and improvement of light efficiency will be poor and the expected effect cannot be achieved. If the thickness H is greater than 0.8 mm, the heat dissipation of the light source structure will be affected and the accumulated heat will not be easy to dissipate. Therefore, the thickness H of the scattering layer 210 is in the range of 0.3 mm-0.8 mm.

[0048] In this case, reference Figure 6 The scattering structure 20 further includes a high arch convex portion 220, which is arranged on the side of the scattering layer 210 away from the display unit 10. In order to optimize the lighting fullness, the high arch convex portion 220 is added on the top of the scattering layer 210. The high arch convex portion 220 has a convex shape on the top, which makes the optical path of the light in the central area of ​​the display unit 10 significantly longer. The brightness of the light emitted from the top surface of the high arch convex portion 220 corresponding to the area directly above the display chip 120 decreases, so that the lighting brightness of the area directly above the display chip 120 decreases significantly (such as Figure 7 ), reducing the difference in light intensity at angles other than perpendicular to the chip (such as Figure 8 , the brightness value of the middle part of the light source is reduced to less than 5.0*10 5 cd / m 2 ), further reducing the central luminous brightness and completely eliminating the bright spots; and the diameter of the central high-brightness area is more than 0.3mm, and the area of ​​the high-brightness area is increased; more beneficially, the brightness value of the outermost area is increased to 0.5*10 5 cd / m 2 , and compared to Figure 4-Figure 5 For the solution without high arch convex parts, the brightness curve from the middle to the outermost area is gentle, the brightness change rate is low, and the value changes gently. In addition, the parts between the middle and the edge have higher brightness values, which makes the overall lighting fullness of the light emitting surface of the light source structure higher and the light emission is more uniform, which has a better lighting effect when used in car lights.

[0049] refer to Figure 6 In some embodiments, the top surface of the high arch protrusion 220 is a spherical surface.

[0050] Specifically, the light emitted by the display chip 120 is scattered and reaches the top surface of the high arch protrusion 220 and is emitted. When the top surface is in a spherical form, the light emitted from the spherical top surface is more divergent, which can improve the brightness uniformity of the light-emitting surface and reduce the difference and contrast between the light intensity perpendicular to the surface of the display chip 120 and the light intensity in other angle areas other than perpendicular to the display chip 120.

[0051] refer to Figure 6In some embodiments, the distance between the top surface of the high arch protrusion 220 and the surface of the display unit 10 is A, wherein the value range of A is 0.1 mm-0.3 mm.

[0052] In the specific operation, the mixed colloid is dripped on the surface of the light source, and the dosage of the dripped colloid and the process mold are controlled so that the glue forms a convex shape after cooling, and is controlled within a certain tolerance, and finally formed into a scattering structure 20 with a high arch protrusion 220. That is, after the protrusion height of the high arch protrusion 220 is preset, the dosage of the colloid is determined by the dosage test, so as to obtain a light source structure with preset parameters. It has been verified that if the value of A is too low, the scattering effect is reduced. When this parameter range is used, the brightness and fullness of the light source structure are higher, the uniformity of the entire light-emitting surface is higher, and the light effect is better.

[0053] In some embodiments, the glue layer transmittance of the scattering layer 210 is in the range of 10%-30%. It has been verified that when the glue layer transmittance is lower than 10%, the average brightness of the overall luminescence is weak, and when the glue layer transmittance exceeds 30%, the scattering effect is difficult to achieve the expected, and the brightness of the luminous center is still strong and the contrast is large. Therefore, when the glue layer transmittance is in the range of 10%-30%, the expected luminous brightness can be achieved and the luminescence can be more uniform.

[0054] It is worth noting that the material of the scattering structure 20 is any one or more of acrylic resin, silicone resin or epoxy resin, and organic silicon light diffusion particles and inorganic light diffusion particles accounting for 0.1% to 3% of the total weight are added inside. Acrylic resin has good temperature resistance, good thermal stability and no yellowing during processing, and organic light diffusion particles and inorganic light diffusion particles accounting for 0.1% to 3% of the total weight are added inside. A small proportion of particles can increase transmittance and reduce brightness loss, while an excessively large proportion can reduce transmittance. The transmittance can be adjusted by changing the proportion of addition.

[0055] The organic light diffusion particles include particles of barium sulfate, silicon dioxide, titanium dioxide, calcium carbonate and / or aluminum hydroxide, with a particle size of 2-4 microns. The organic light diffusion particles include microspheres of cross-linked polystyrene or polymethacrylate, with a particle size of 2-4 microns.

[0056] refer to Figure 7 In some embodiments, there are multiple light source structures arranged in an array in the vertical and horizontal directions. Since the surface fullness of a single light source structure is improved and the contrast is reduced, when the array-arranged light source structures expand the display range, the pattern formed by the entire large display surface is evenly lit, the human eye feels soft, and it is not easy to get tired.

[0057] refer to Figure 6 In some embodiments, the display unit 10 includes:

[0058] substrate 110;

[0059] The display chip 120 is disposed on the surface of the substrate 110;

[0060] An isolation protection body 130, covering the surface of the display chip 120 to isolate the display chip 120 from the outside;

[0061] The peripheral support 140 is disposed on the surface of the substrate 110 and on the periphery of the isolation protection body 130 .

[0062] Specifically, the light emitted by the display chip 120 is scattered onto the surface of the peripheral bracket 140, and then reflected and scattered onto the isolation protective body 130 surrounded by the peripheral bracket 140 and emitted. The isolation protective body 130 makes the light uniform, which is beneficial to reduce the light intensity perpendicular to the chip surface and increase the light intensity in other angle areas other than perpendicular to the chip angle, thereby promoting the improvement of the fullness of the entire display unit 10 and the uniformity of the entire light-emitting surface.

[0063] The display chip 120 mentioned above can be a single-electrode or dual-electrode chip and is fixed on the surface of the substrate 110 . The display chip 120 is located at a specific position of the substrate 110 , which can prevent the position of the display chip 120 from being offset.

[0064] The above-mentioned display chip 120 contains positive and negative electrode pads, which are respectively connected to the corresponding positive and negative electrodes on the substrate 110 through bonding wires 150; the substrate 110 is externally connected to the PCB circuit board. When an external input voltage is connected between the positive and negative electrodes of the substrate 110, the display chip 120 is excited by current conduction and emits light of a specific color.

[0065] In some embodiments, the substrate 110 is a metal substrate 110. Specifically, the metal substrate 110 is a conductive part, which is divided into a positive electrode and a negative electrode. In the drawings, it is connected to the positive and negative electrodes of the display chip 120 through bonding wires 150, respectively, for providing current to the display chip 120.

[0066] In some embodiments, the peripheral bracket 140 is made of EMC material, PCT material or ceramic. The peripheral bracket 140 is used to protect and seal the display chip 120. It is non-conductive and can be made of EMC material, PCT material, ceramic, etc. The color is usually white or black. The peripheral bracket 140 presses the positive and negative electrodes of the substrate 110 from both sides to separate the positive and negative electrodes to prevent the positive and negative electrodes from being directly connected to cause a short circuit.

[0067] In some embodiments, the isolation protection body 130 is epoxy resin or silicone, which is mixed with one or more of scattering particles, red phosphor, yellow phosphor, and green phosphor, preferably organic silicone mixed with yellow phosphor and scattering particles. Of course, in other embodiments, other types of particles can be doped, which is not limited here. Epoxy resin has a mesh structure, good sealing, high strength and scratch resistance. After being doped with particles, the uniformity of light emission can be increased and the light emission looks softer.

[0068] In some embodiments, the isolation protection body 130 is integrally formed on the surface of the display chip 120, or directly formed in the peripheral bracket 140. During operation, after the display chip 120 is installed, the mixed colloid is dripped into the recess of the peripheral bracket 140, and the glue is cooled to form a convex shape and controlled within a certain tolerance, and finally formed into a display unit 10 with a specified convex shape.

[0069] The present application also discloses a vehicle lamp, comprising the light source structure described in any one of the embodiments.

[0070] The present application also discloses a vehicle, comprising the vehicle light in the aforementioned embodiment.

[0071] The above-mentioned means of transportation can be a car, a train, a high-speed rail or other means of transportation that requires headlights. By adopting the above-mentioned headlights, the central light brightness is low, there is no bright spot, the lighting is fuller, the contrast is low, the light is more uniform, the lighting effect is very good, and there is no fatigue when watching screen animations for a long time.

[0072] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0073] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A light source structure, characterized in that: include: A display unit, comprising a light emitting side and a backlight side; A scattering structure, covering the light-emitting side surface of the display unit; The scattering structure includes a scattering layer and a high arched protrusion; wherein the scattering layer and the high arched protrusion are arranged in sequence in a direction gradually away from the display unit, and the middle area of ​​the top surface of the high arched protrusion is raised, and the thickness H of the scattering layer is 0.3mm-0.8mm.

2. The light source structure according to claim 1, characterized in that: The top surface of the high arch protrusion is a spherical surface.

3. The light source structure according to claim 1, characterized in that: The distance between the top surface of the high arch protrusion and the surface of the display unit is A, wherein the value range of A is 0.1 mm-0.3 mm.

4. The light source structure according to claim 1, characterized in that: The transmittance of the adhesive layer of the scattering layer is in the range of 10%-30%.

5. The light source structure according to claim 1, characterized in that: There are multiple light source structures, which are arranged in an array in the vertical and horizontal directions.

6. The light source structure according to claim 1, characterized in that: The display unit comprises: substrate; A display chip is disposed on the surface of the substrate; An isolation protector, covering the surface of the display chip to isolate the display chip from the outside world; The peripheral support is arranged on the surface of the substrate and on the periphery of the isolation protection body.

7. The light source structure according to claim 6, characterized in that: The isolation protection body is epoxy resin or silica gel, which is mixed with one or more of scattering particles, red phosphor, yellow phosphor, and green phosphor.

8. The light source structure according to claim 6, characterized in that: The isolation protection body is integrally formed on the surface of the display chip, or directly formed in the peripheral support.

9. A vehicle lamp, characterized in that: The light source structure comprises the light source structure described in any one of claims 1 to 8.

10. A means of transport, characterized in that: The vehicle lamp comprising the vehicle lamp according to claim 9.

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