MINI LED lamp panel and projector

Abstract

The utility model discloses a MINI LED lamp panel and a projector. The MINI LED lamp panel comprises a substrate, a boss on the substrate, a MINI LED chip attached to the boss, a conical reflection cup and a support structure for supporting and connecting the conical reflection cup and the substrate. Wherein the conical reflection cup is provided with a first port and a second port, and the first port is smaller than the second port; the inner diameter of the conical reflection cup is gradually increased from the first port to the second port; the boss is located in the first port, so that the MINI LED chip is located in the conical reflection cup; a gap is reserved between the first port and the substrate. A gap is reserved between the first port, close to the MINI LED lamp, of the conical reflection cup and the substrate, so that the conical reflection cup is prevented from being heated to deform; the boss is arranged on the substrate, so that the MINI LED chip is located in the conical reflection cup, and the light energy utilization rate of the MINI LED chip is improved.

Description

Technical Field

[0001] The utility model relates to the field of LED devices, in particular to a MINI LED lamp board and a projector. Background Art

[0002] LED lamps are widely used as lighting sources in various devices, especially in projectors and other devices. When LED lamps are used as lighting sources, higher performance requirements are placed on them. As the country pays more and more attention to lighting energy saving and environmental protection, and with the continuous improvement of LED technology, more attention is paid to the power saving of LED lamps, and higher requirements are placed on them. In addition, if the working power of an LED lamp is too high, it will cause the LED lamp to heat up severely, which will make it difficult for the heat dissipation system to dissipate heat, thus affecting the service life of the LED lamp. Therefore, when LED lamps are used as lighting sources in various devices, ensuring the working performance of LED lamps while limiting the working power of LED lamps is one of the key development trends of LED lamps. Utility Model Content

[0003] The purpose of the utility model is to provide a MINI LED light board and a projector, which can improve the light energy utilization rate of the MINI LED lamp while ensuring the good working performance of the MINI LED light board.

[0004] In order to solve the above technical problems, the utility model provides a MINI LED light board, including a substrate, a boss arranged on the substrate, a MINI LED chip fitted on the boss, a conical reflector cup, and a bracket structure supporting and connecting the conical reflector cup and the substrate;

[0005] The conical reflector has a first port and a second port, and the first port is smaller than the second port; the inner diameter of the conical reflector gradually increases from the first port to the second port; the boss is located in the first port so that the MINI LED chip is located inside the conical reflector; and a gap is left between the first port and the substrate.

[0006] In an optional embodiment of the present application, the surface on which the boss is fitted to set the MINI LED chip is a concave surface.

[0007] In an optional embodiment of the present application, the boss is a heat dissipation boss;

[0008] The boss includes a first structural layer and a second structural layer stacked on the substrate; wherein the first structural layer is located between the substrate and the second structural layer, and the area of ​​the first structural layer is larger than the area of ​​the first port; the area of ​​the second structural layer is equal to the area of ​​the MINI LED chip and smaller than the area of ​​the first port.

[0009] In an optional embodiment of the present application, a heat dissipation metal sheet is provided on a surface of the substrate facing away from the boss.

[0010] In an optional embodiment of the present application, the thickness of the center position of the boss is 0.1 mm to 1.5 mm.

[0011] In an optional embodiment of the present application, a difference between a diameter of the MINI LED chip and a diameter of the first port is not greater than a set difference.

[0012] In an optional embodiment of the present application, the side length of the MINI LED chip is 50um~200um.

[0013] In an optional embodiment of the present application, a reflective film layer is provided on the inner surface of the conical reflective cup.

[0014] In an optional embodiment of the present application, the support structure is a heat-resistant plastic part.

[0015] A projector comprises the MINI LED light board as described in any one of the above items.

[0016] The utility model provides a MINI LED light board and a projector, wherein the MINI LED light board comprises a substrate, a boss arranged on the substrate, a MINI LED chip fitted on the boss, a conical reflector cup, and a bracket structure supporting and connecting the conical reflector cup and the substrate; wherein the conical reflector cup has a first port and a second port, and the first port is smaller than the second port; the inner diameter of the conical reflector cup gradually increases from the first port to the second port; the boss is located in the first port so that the MINI LED chip is located inside the conical reflector cup; and a gap is left between the first port and the substrate.

[0017] In the MINI LED light board of the present application, in order to prevent the conical reflector cup from directly contacting the substrate, thereby causing the conical reflector cup to be heated and deformed, a gap is left between the first port of the conical reflector cup close to the MINI LED lamp and the substrate, thereby preventing the heat generated by the MINI LED chip from being transferred to the conical reflector cup, and also preventing the conical reflector cup from scratching the surface of the MINI LED chip, thereby causing the MINI LED chip to die; on this basis, in order to prevent the light output by the MINI LED chip from leaking from the gap between the conical reflector cup and the substrate, a boss is further provided on the substrate, and the height of the MINI LED chip on the substrate is raised by the boss, so that the MINI LED chip can enter the interior of the conical reflector cup, thereby making all the light output by the MINI LED chip basically incident on the inner wall of the conical reflector cup, thereby avoiding the problem of light leakage of the light output by the MINI LED chip, thereby improving the light energy utilization rate of the MINI LED chip to a certain extent, thereby making the MINI LED light board have a higher light intensity on the basis of consuming the same energy, thereby improving the lighting performance of the MINI LED light board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the cross-sectional structure of a MINI LED light board provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of a portion of the structure of a MINI LED light board provided in an embodiment of the present application;

[0021] In the accompanying drawings: 1 is a substrate, 2 is a boss, 21 is a first structural layer, 22 is a second structural layer, 3 is a MINI LED chip, 4 is a conical reflective cup, 41 is a first port, 42 is a second port, and 5 is a bracket structure. DETAILED DESCRIPTION

[0022] The core of the utility model is to provide a MINI LED light board and a projector, which improves the light energy utilization rate of the MINI LED lamp while preventing the conical reflector cup of the MINI LED light board from being deformed due to heat.

[0023] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 and Figure 2 As shown, Figure 1 A schematic diagram of the cross-sectional structure of a MINI LED light board provided in an embodiment of the present application; Figure 2 A schematic diagram of the partial structure of the MINI LED light board provided in an embodiment of the present application.

[0025] In an optional embodiment of the present application, the MINI LED light board may include:

[0026] A substrate 1, a boss 2 arranged on the substrate 1, a MINI LED chip 3 arranged on the boss 2, a conical reflector cup 4, and a support structure 5 supporting and connecting the conical reflector cup 4 and the substrate 1;

[0027] Among them, the conical reflector cup 4 has a first port 41 and a second port 42, and the first port 41 is smaller than the second port 42; the inner diameter of the conical reflector cup 4 gradually increases from the first port 41 to the second port 42; the boss 2 is located in the first port 41 so that the MINI LED chip 3 is located inside the conical reflector cup 4; a gap is left between the first port 41 and the substrate 1.

[0028] It should be noted that the MINI LED light board in this embodiment refers to a relatively small LED light board, and the MINI LED chip 3 in the MINI LED light board can be a rectangular or square chip, and its side length can be 50um~200um. Obviously, the MINI LED light board in this embodiment can be used in a micro projector or as a micro light source in other micro optical devices, and this application does not specifically limit this.

[0029] like Figure 1 and Figure 2As shown, the MINI LED light board in this embodiment mainly includes main structural components such as a substrate 1, a MINI LED chip 3 and a conical reflector cup 4; wherein the MINI LED chip 3 is arranged on the substrate 1, and the conical reflector cup 4 can be a conical structure, a square cone structure, etc.; the tip and the bottom of the conical reflector cup 4 both form an opening structure, namely a first port 41 and a second port 42 respectively; the first port 41 of the conical reflector cup 4 is also the port through which the light output by the MINI LED chip 3 enters the conical reflector cup 4, and the second port 42 is the port through which the light output by the MINI LED chip 3 is output from the conical reflector cup 4, and the aperture size of the first port 41 is larger than the aperture size of the second port 42. The main function of the conical reflective cup 4 is to reflect and shape the light output by the MINI LED chip 3 through its inner wall, thereby adjusting the shape of the cross-section of the light beam output by the MINI LED chip 3 to a certain extent; therefore, a reflective film layer can be further provided on the inner wall of the conical reflective cup 4 to improve the reflective performance of the inner wall of the conical reflective cup 4.

[0030] In practical applications, in the MINI LED light board of this embodiment, the first port 41 of the conical reflector 4 is arranged directly opposite to the MINI LED chip 3 on the substrate 1. Therefore, in practical applications, the light output by the MINI LED chip 3 arranged on the substrate 1 enters the conical reflector 4 through the first port 41, is reflected and shaped by the inner wall surface of the conical reflector 4, and is finally output from the second port 42.

[0031] Considering that the MINI LED chip 3 often generates a large amount of heat during the actual working process, and if the conical reflector cup 4 is heated for a long time, it will inevitably deform as the use time increases, thereby affecting the spot shape or uniformity of the spot brightness of the light beam output through the conical reflector cup 4, and also affecting the service life of the conical reflector cup 4 to a certain extent. For this reason, the first port 41 of the conical reflector cup 4 in this embodiment is not directly in contact with the substrate 1, but a certain gap is left between the first port 41 and the substrate 1; therefore, when the MINI LED chip 3 generates heat, the heat of the MINI LED chip 3 will not be transferred to the conical reflector cup 4 through the substrate 1 area near the MINI LED chip 3, thereby greatly reducing the possibility of the conical reflector cup 4 maintaining a high temperature state for a long time, thereby avoiding the problem of the conical reflector cup 4 being deformed due to heat; and leaving a certain gap between the MINI LED chip 3 and the substrate 1 can also avoid the conical reflector cup 4 scratching the surface of the MINI LED chip 3, resulting in the problem of the MINI LED chip 3 being dead. Figure 1As shown, in actual application, the conical reflector cup 4 can be connected to the substrate 1 through a support structure 5, wherein one end of the support structure 5 is connected to the edge of the second port 42 of the conical reflector cup 4, and the other end of the support structure 5 is connected to the edge of the substrate 1, thereby reducing the heat generated by the MINI LED chip 3 from being transferred to the conical reflector cup 4 to a certain extent.

[0032] In addition, the support structure 5 can be made of plastic parts with good heat resistance to ensure that the plastic parts can maintain good working performance even in the high temperature environment generated by the MINI LED chip 3 .

[0033] Based on the above discussion, since there is a gap between the first port 41 of the conical reflector 4 and the substrate 1, and the divergence angle of the light output by the MINI LED chip 3 is basically 180 degrees, if the MINI LED chip 3 is directly attached to the surface of the substrate 1, it is inevitable that part of the light leaks from the gap between the first port 41 of the conical reflector 4 and the substrate 1 and cannot enter the conical reflector 4; and it is obvious that for the light output by the MINI LED chip 3, only the light that enters the conical reflector 4 and is transmitted and output from the conical reflector 4 can play a lighting role; if the light of the MINI LED chip 3 leaks, there will inevitably be a certain amount of energy waste.

[0034] To this end, in this embodiment, a boss 2 is further provided on the substrate 1, and the MINI LED lamp is provided on the boss 2; thus, on the surface of the substrate 1, the MINI LED chip 3 is also raised by the boss 2, thereby increasing the distance between the MINI LED chip 3 and the substrate 1, and thus being closer to the first port 41 of the conical reflector cup 4; in order to ensure that the light output by the MINI LED chip 3 can completely enter the conical reflector cup 4, the thickness of the boss 2 should be sufficient to allow the boss 2 to extend into the first port 41 in a direction away from the substrate 1, thereby allowing the MINI LED chip 3 provided on the surface of the boss 2 away from the substrate 1 to be located in the conical reflector cup 4, thereby ensuring that the light output by the MINI LED chip 3 is largely prevented from leaking from the gap between the first port 41 and the substrate 1, so that the light output by the MINI LED chip 3 with the largest divergence angle can also be incident on the inner wall of the conical reflector cup 4, and after being reflected from the inner wall of the conical reflector cup 4, it is output from the second port 42 of the conical reflector cup 4. It can be seen that in this embodiment, the boss 2 is used to raise the MINI LED chip 3 on the substrate 1, so that the light output by the MINI LED chip 3 can be more fully utilized, so that the MINI LED chip 3 has better lighting brightness while achieving the same working power, which is beneficial to improving the energy utilization rate of the MINI LED light board.

[0035] Based on the above discussion, in order to more comprehensively prevent the light output by the MINI LED chip 3 from leaking from the first port 41 of the conical reflector cup 4, in another optional embodiment of the present application, the surface of the boss 2 on which the MINI LED chip 3 is arranged can be set to a concave surface, that is, the surface of the boss 2 has a certain convergence effect on the light output by the MINI LED chip 3, thereby preventing the light output by the MINI LED chip 3 from leaking from the first port 41.

[0036] In addition, the shape of the concave surface of the boss 2 in this embodiment can be set based on the shape of the conical reflective cup 4 and the area size of the MINI LED chip 3, so as to ultimately avoid light leakage of the light output by the MINI LED chip 3 and improve the uniformity of the light beam output by the MINI LED light board as much as possible. When actually preparing the MINI LED light board, the concave surface on the boss 2 can be machined and formed first, and then the MINI LED chip 3 can be directly formed on the concave surface; of course, after the boss 2 is machined to form a concave surface, a reflective film layer can be set on the concave surface, and then the MINI LED chip 3 can be directly set on the concave surface. Even if the MINI LED chip 3 and the concave surface are not completely fitted, it can be ensured that the MINI LED chip 3 can be completely reflected into the conical reflective cup 4. In actual applications, there can be other settings between the MINI LED chip 3 and the boss 2, which are not listed one by one in this embodiment.

[0037] Based on any of the above embodiments, in an optional embodiment of the present application, the boss 2 in the MINI LED light board may further include:

[0038] Boss 2 is a heat dissipation boss;

[0039] The boss 2 includes a first structure layer 21 and a second structure layer 22 stacked on the substrate 1; wherein the first structure layer 21 is located between the substrate 1 and the second structure layer 22, and the area of ​​the first structure layer 21 is greater than the area of ​​the first port 41; the area of ​​the second structure layer 22 is equal to the area of ​​the MINI LED chip 3 and is smaller than the area of ​​the first port 41.

[0040] It can be understood that the boss 2 in this embodiment can be made of a material with good heat dissipation performance to form a heat dissipation boss; on this basis, in order to improve the heat dissipation effect of the MINI LED chip 3, the boss 2 in this embodiment is further set to have two structural layers, namely, a first structural layer 21 and a second structural layer 22. The first structural layer 21 is a structural layer directly attached to the surface of the substrate 1, and the second structural layer 22 is a structural layer located on the first structural layer 21 and directly carrying the MINI LED chip 3. Among them, the first structural layer 21 covers a relatively large area on the substrate 1, so that the heat generated by the MINI LED chip 3 is easily dissipated from the first structural layer 21. On this basis, in addition to conducting the heat generated by the MINI LED chip 3 to the first structural layer 21, the second structural layer 22 mainly functions to raise the MINI LED chip 3 to be located in the conical reflector cup 4. Therefore, the second structural layer 22 can be completely the same as the MINI LED chip 3 in terms of area size and surface shape, and the port area of ​​the first port 41 of the conical reflector cup 4 should be slightly larger than the area of ​​the MINI LED chip 3, so as to ensure that the MINI LED chip 3 can be inserted into the interior of the conical reflector cup 4 through the first port 41; however, the port area corresponding to the first port 41 of the conical reflector cup 4 should not be too large compared to the area of ​​the MINI LED chip 3, thereby increasing the problem of light leakage from the first port 41 output by the MINI LED chip 3. Therefore, in practical applications, the difference between the diameter size of the MINI LED chip 3 and the diameter size of the first port 41 may not be greater than the set difference; the set difference may be determined through repeated experiments, as long as it is ensured that the MINI LED chip 3 does not leak light from the first port 41, and this is not specifically limited in the present application.

[0041] On this basis, in order to further improve the heat dissipation effect of the MINI LED light board, refer to Figure 1 In an optional implementation of this embodiment, a heat dissipation metal sheet is further provided on the surface of the substrate 1 away from the boss 2, and the heat dissipation metal sheet may be a metal copper sheet. The coverage area of ​​the metal copper sheet on the surface of the substrate 1 away from the boss 2 may be equivalent to the coverage area of ​​the first structural layer 21 of the boss 2.

[0042] In addition, as mentioned above, the thickness of the boss 2 in the present application should be satisfied to ensure that the MINI LED chip 3 can extend to the inside of the conical reflector cup 4, so the thickness of the center position of the boss 2 is 0.1mm~1.5mm. It can be understood that when the boss 2 includes the first structure layer 21 and the second structure layer 22, the thickness of the center position of the boss 2 is the sum of the thickness of the center position of the first structure layer 21 and the center position of the second structure layer 22; and in the embodiment where the surface of the boss 2 carrying the MINI LED chip 3 is a concave surface, the thickness of the center position of the boss 2 should correspond to the thickness of the thinnest position of the boss 2.

[0043] To summarize, in the MINI LED lamp board of the present application, in order to avoid direct contact between the conical reflector cup and the substrate, thereby causing the conical reflector cup to be heated and deformed, a gap is left between the first port of the conical reflector cup close to the MINI LED lamp and the substrate, thereby avoiding the heat generated by the MINI LED chip from being conducted to the conical reflector cup, and also avoiding the conical reflector cup from scratching the surface of the MINI LED chip, resulting in the dead light of the MINI LED chip; on this basis, in order to avoid the light output by the MINI LED chip from leaking from the gap between the conical reflector cup and the substrate, a boss is further provided on the substrate, and the height of the MINI LED chip on the substrate is raised by the boss, so that the MINI LED chip can enter the interior of the conical reflector cup, so that all the light output by the MINI LED chip can basically be incident on the inner wall of the conical reflector cup, thereby avoiding the problem of light leakage of the light output by the MINI LED chip, thereby improving the light energy utilization rate of the MINI LED chip to a certain extent, thereby making the MINI LED lamp board have a higher light intensity on the basis of consuming the same energy, thereby improving the lighting performance of the MINI LED lamp board.

[0044] The present application also provides an embodiment of a projector, which includes the MINI LED light board as described in any of the above items.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish an entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "includes", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements are inherent to the elements. In the absence of more restrictions, the elements limited by the sentence "comprising one..." do not exclude the presence of other identical elements in the process, method, article or equipment comprising the elements. In addition, the above-mentioned technical solution provided in the embodiment of the present application is consistent with the corresponding technical solution in the prior art in principle, and the part is not described in detail, so as to avoid too much redundancy.

[0046] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A MINI LED light board, characterized in that: It includes a substrate, a boss arranged on the substrate, a MINI LED chip attached to the boss, a conical reflector cup, and a bracket structure supporting and connecting the conical reflector cup and the substrate; The conical reflector has a first port and a second port, and the first port is smaller than the second port; the inner diameter of the conical reflector gradually increases from the first port to the second port; the boss is located in the first port so that the MINI LED chip is located inside the conical reflector; and a gap is left between the first port and the substrate.

2. The MINI LED light board according to claim 1, characterized in that: The surface on which the boss is fitted to set the MINI LED chip is a concave surface.

3. The MINI LED light board according to claim 1, characterized in that: The boss is a heat dissipation boss; The boss includes a first structural layer and a second structural layer stacked on the substrate; wherein the first structural layer is located between the substrate and the second structural layer, and the area of ​​the first structural layer is larger than the area of ​​the first port; the area of ​​the second structural layer is equal to the area of ​​the MINI LED chip and smaller than the area of ​​the first port.

4. The MINI LED light board as claimed in claim 3, characterized in that: A heat dissipation metal sheet is arranged on a surface of the substrate away from the boss.

5. The MINI LED light board as claimed in claim 3, characterized in that: The thickness of the center position of the boss is 0.1mm~1.5mm.

6. The MINI LED light board according to claim 1, characterized in that: The difference between the diameter of the MINI LED chip and the diameter of the first port is not greater than a set difference.

7. The MINI LED light board according to claim 1, characterized in that: The side length of the MINI LED chip is 50um~200um.

8. The MINI LED light board according to claim 1, characterized in that: The inner surface of the conical reflective cup is provided with a reflective film layer.

9. The MINI LED light board according to claim 1, characterized in that: The supporting structure is a heat-resistant plastic part.

10. A projector, characterized in that: Comprising the MINI LED light board as described in any one of claims 1 to 9.

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