LED device and display screen

Abstract

The application relates to an LED device and a display screen, the LED device comprising a support, a light-emitting chip fixed in the support, a lens glue body fixed on the light-emitting chip, a groove provided on the support at the periphery of the lens glue body, and reflective glue filled in the groove, so that the reflective glue surrounds the periphery of the lens glue body, and the lens glue body protrudes from the reflective glue. By arranging the lens glue body in the support, the brightness of the light-emitting chip can be improved, meanwhile, the reflective glue is filled in the groove, light is reflected by the reflective glue when passing through, and the left and right red and blue light is covered, so that the large-view-angle color deviation problem of the LED using the outward convex lens in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of LED display technology, specifically to an LED device and a display screen. Background Technology

[0002] LEDs have a series of characteristics such as low voltage, low power consumption, high luminous efficiency, short response time, pure light color, light weight, and small size. With the rapid development of science and technology, it is now possible to produce high-brightness, high-performance products with various colors across the entire visible spectrum. Many traditional lighting lamps have also begun to adopt LEDs as light-emitting units. However, with the continuous expansion of their application fields, higher requirements have been placed on the energy efficiency and performance of LEDs.

[0003] In related technologies, current LEDs generally incorporate convex lenses to enhance brightness. The lens adhesive height is directly proportional to brightness; that is, the higher the adhesive height, the better the brightening effect at the center point. However, the lens adhesive height is inversely proportional to the light emission angle; that is, the higher the adhesive height, the smaller the light emission angle. According to experimental data, taking a current LED bracket as an example, with a cup depth of 900μm and a cup diameter of 2.3mm, for every 0.0001ml increase in adhesive volume, the light emission angle decreases by approximately 3.5%. Changes in adhesive height affect both brightness and light emission angle, and brightness and light emission angle are inversely proportional. Figure 1 Adhesive data and Figure 2 The comparison chart of brightness ratio and light emission angle shows that when the brightness increases from 101% to 135.8%, the brightness increases by 34%, while the light emission angle decreases by about 30.7°.

[0004] Therefore, while using convex lenses on LEDs can increase brightness, significant color distortion will occur at wide viewing angles. As a result, LED lenses are currently only suitable for specific scenarios.

[0005] Therefore, it is necessary to design a new LED device to overcome the above problems. Summary of the Invention

[0006] This application provides an LED device and display screen that can solve the technical problem of color distortion when using convex lenses for LEDs at large viewing angles in related technologies.

[0007] In a first aspect, embodiments of this application provide an LED device, comprising: a bracket, a light-emitting chip fixedly disposed within the bracket, a lens colloid fixedly disposed on the light-emitting chip, a groove provided around the lens colloid on the bracket, the groove being filled with reflective adhesive, such that the reflective adhesive surrounds the lens colloid and the lens colloid protrudes beyond the reflective adhesive.

[0008] In conjunction with the first aspect, in one embodiment, the highest point A of the inner wall of the bracket in contact with the lens colloid is higher than the lowest point B of the groove.

[0009] In conjunction with the first aspect, in one embodiment, a diffuser powder colloid is disposed below the lens colloid, and the diffuser powder colloid surrounds the light-emitting chip.

[0010] In conjunction with the first aspect, in one embodiment, the inner wall of the support has a first inclined surface, and both the diffuser powder colloid and the lens colloid are filled in the cavity enclosed by the first inclined surface; The inner wall of the bracket also has a second inclined surface and a third inclined surface. The second inclined surface connects the first inclined surface and the third inclined surface. The second inclined surface and the third inclined surface have opposite inclination directions, and the second inclined surface and the third inclined surface form the groove. The third inclined surface has the same inclination direction as the first inclined surface.

[0011] In conjunction with the first aspect, in one embodiment, the third inclined surface is provided with serrations.

[0012] In conjunction with the first aspect, in one embodiment, the connection between the second inclined surface and the first inclined surface forms a sharp angle.

[0013] In conjunction with the first aspect, in one embodiment, the inner wall of the bracket has a first vertical surface, a horizontal surface, and a second vertical surface, the horizontal surface connecting the first vertical surface and the second vertical surface, and the first vertical surface, the horizontal surface, and the second vertical surface forming the groove.

[0014] In conjunction with the first aspect, in one embodiment, the bracket is fixed with six independent metal pads, each of the metal pads having pins; the bracket is fixed with three different colored light-emitting chips, the positive and negative terminals of each light-emitting chip being electrically connected to an independent metal pad respectively.

[0015] In conjunction with the first aspect, in one embodiment, the bracket is fixed with four independent metal pads, each of which has a pin, one of which is a common electrode pad and the rest are non-common electrode pads; the bracket is fixed with three different colored light-emitting chips, all of which are fixed to the common electrode pad.

[0016] Secondly, embodiments of this application provide a display screen, characterized in that it employs the aforementioned LED device.

[0017] The beneficial effects of the technical solutions provided in this application include: By placing a lens colloid inside the bracket, the brightness of the light-emitting chip can be improved. At the same time, by filling the groove with reflective adhesive, the light is reflected when it passes through, blocking the red and blue light on the left and right sides, thereby improving the color distortion problem at a large viewing angle and solving the technical problem of color distortion at a large viewing angle when using convex lenses for LEDs in related technologies. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram showing the ratio of lens adhesive height to brightness. Figure 2 This is a schematic diagram comparing the brightness ratio and the light emission angle. Figure 3 This is a schematic diagram of the structure of an LED device provided in an embodiment of this application; Figure 4 This is a schematic diagram of another LED device provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a trench provided in an embodiment of this application; Figure 6 This is a schematic diagram of another trench structure provided in an embodiment of this application; Figure 7 This is a schematic diagram of another type of trench provided in an embodiment of this application; Figure 8 A schematic diagram of a 6-pin structure provided in an embodiment of this application; Figure 9 This is a schematic diagram of a 4-pin structure provided in an embodiment of this application.

[0020] In the picture: 1. Support; 11. Groove; 12. First inclined plane; 13. Second inclined plane; 14. Third inclined plane; 15. Sawtooth; 16. First vertical plane; 17. Horizontal plane; 18. Second vertical plane; 2. Light-emitting chip; 3. Lens colloid; 4. Reflective adhesive; 5. Diffusing powder colloid; 6. Metal pads. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0022] This application provides an LED device and display screen that can solve the technical problem of color distortion when using convex lenses for LEDs at large viewing angles in related technologies.

[0023] See Figure 3 As shown, an LED device provided in an embodiment of this application includes: a bracket 1, a light-emitting chip 2 fixedly disposed in the bracket 1, a lens colloid 3 fixedly disposed on the light-emitting chip 2, a groove 11 provided on the bracket 1 around the lens colloid 3, the groove 11 being filled with reflective adhesive 4, such that the reflective adhesive 4 surrounds the lens colloid 3, and the lens colloid 3 protrudes from the reflective adhesive 4.

[0024] See Figure 3 As shown, in this embodiment, a packaging cavity is formed inside the support 1, and the light-emitting chip 2 is fixed inside the packaging cavity. The support 1 is also fixed with a metal pad 6, and the light-emitting chip 2 is electrically connected to the metal pad 6. The lens colloid 3 is encapsulated inside the packaging cavity and located above the light-emitting chip 2, forming a convex lens. The surface of the lens colloid 3 protrudes from the top surface of the support 1. The packaging cavity includes a groove 11 surrounding the lens colloid 3, and the reflective adhesive 4 in the groove 11 is also arranged around the lens colloid 3. The reflective adhesive 4 is preferably a high-reflectivity white adhesive.

[0025] In this embodiment, a lens colloid 3 is set inside the bracket 1. The lens colloid 3 can improve the brightness of the light-emitting chip 2. At the same time, the inner wall structure of the bracket 1 is changed, a groove 11 is set, and a reflective adhesive 4 is filled in the groove 11. When light passes through, it will be reflected by the reflective adhesive 4, blocking the red and blue light on the left and right sides, thereby improving the color distortion problem at a large viewing angle and solving the technical problem of color distortion at a large viewing angle when using convex lenses for LEDs in related technologies.

[0026] Furthermore, in one embodiment, the highest point A of the inner wall of the support 1 in contact with the lens colloid 3 is higher than the lowest point B of the groove 11. See also Figure 3As shown, in this embodiment, the lens colloid 3 is built into the bracket 1, and the lens colloid 3 is in contact with the inner wall of the bracket 1, and has the highest contact point A; at the same time, the groove 11 is recessed downward to form the lowest point B, and the highest point A is higher than the lowest point B of the groove 11, so that part of the reflective adhesive 4 will extend to the bottom of the lens colloid 3. This arrangement can not only form the lens colloid 3 in the bracket 1, but also increase the water vapor path between the colloids and improve the waterproofness.

[0027] In existing LED device structures, the vertex where the convex lens contacts the inner wall of the bracket is almost located on the top surface of the bracket. However, in this embodiment, by changing the cup-shaped structure of the bracket 1, the contact vertex between the inner wall of the bracket 1 and the lens colloid 3 is lowered from the top surface of the bracket 1 to point A inside the bracket 1, allowing the lens colloid 3 after dispensing to be embedded inside the bracket 1. The groove 11 can be filled with the corresponding glue according to different application scenarios.

[0028] See Figure 4 As shown, the height between the highest point of the lens protrusion and the contact point between the lens and the inner wall of the support 1 is denoted as the first height H1, and the height between the highest point of the lens protrusion and the surface of the light-emitting chip 2 is denoted as the second height H2 (see [reference]). Figure 3 (As shown). By comparing with existing LED device structures in related technologies, it can be seen that, under the same amount of adhesive or the same second protrusion height H2, the first height H1 of the built-in lens adhesive 3 in this embodiment has a higher degree of protrusion, resulting in a more significant increase in brightness and a better brightness effect; under the same brightness or the same first protrusion height H1, the built-in lens adhesive 3 in this embodiment requires less adhesive, saving more materials and reducing costs; under the same brightness or the same first protrusion height H1, the portion of the built-in lens adhesive 3 protruding from the top surface of the support 1 in this embodiment is smaller, and the groove 11 between the lens adhesive 3 and the support 1 is filled with reflective adhesive 4. By utilizing the reflectivity of the high-reflectivity adhesive 4, the problem of bright spots at large viewing angles can be improved.

[0029] Furthermore, in some embodiments, see Figure 3 As shown, a diffusing powder colloid 5 is disposed below the lens colloid 3, and the diffusing powder colloid 5 surrounds the light-emitting chip 2. In this embodiment, the diffusing powder colloid 5 disposed below the lens colloid 3 allows light to be diffused when it passes through, increasing the light emission angle. Thus, while the lens colloid 3 improves the overall brightness, the diffusing powder colloid 5 increases the light emission angle, greatly improving the problem of reduced light emission angle despite increased brightness.

[0030] Preferably, in this embodiment, the center position of the lens colloid 3 (i.e., the lens focusing position) is not covered by the diffuser powder colloid 5, so it will not affect the brightening effect.

[0031] Based on the above technical solution, in one embodiment, the inner wall of the support 1 has a first inclined surface 12, and the diffuser powder colloid 5 and the lens colloid 3 are both filled in the cavity enclosed by the first inclined surface 12; the inner wall of the support 1 also has a second inclined surface 13 and a third inclined surface 14, the second inclined surface 13 connecting the first inclined surface 12 and the third inclined surface 14, the second inclined surface 13 and the third inclined surface 14 having opposite inclination directions, and the second inclined surface 13 and the third inclined surface 14 forming the groove 11; the third inclined surface 14 has the same inclination direction as the first inclined surface 12. See also Figure 4 As shown, in this embodiment, the diffuser powder colloid 5 and the lens colloid 3 are filled on the first inclined surface 12 with the same tilt angle. The light emitted by the light-emitting chip 2 is diffused and illuminates the first inclined surface 12, and after being reflected by the first inclined surface 12, it directly enters the lens colloid 3. The first inclined surface 12 is directly connected to the second inclined surface 13 with the opposite tilt direction, and a sharp angle is formed at the connection between the first inclined surface 12 and the second inclined surface 13. The sharp angle formed here makes it easier for the lens to be shaped (in other embodiments, this can also be a rounded corner or other shaped corner). The second inclined surface 13 is directly connected to the third inclined surface 14 with the opposite tilt direction, so that a sharp angle is also formed at the connection between the second inclined surface 13 and the third inclined surface 14. Some of the light is diffused and can illuminate the third inclined surface 14, and after being reflected by the third inclined surface 14, it enters the reflective adhesive 4. Figure 5 (As shown).

[0032] Furthermore, in one embodiment, the third inclined surface 14 is provided with serrations 15. See also Figure 6 As shown, the third inclined surface 14 can be serrated 15 in shape to increase the contact area between the reflective adhesive 4 and the third inclined surface 14, improve the adhesion of the reflective adhesive 4, and increase the reliability of the lamp beads. At the same time, the serrated 15 shape can improve the reflective effect, form diffuse reflection, make the light output of the light filled with diffuser powder more uniform, and make the light from a wide viewing angle softer.

[0033] Further, see Figure 7 As shown, in one embodiment, the inner wall of the bracket 1 has a first vertical surface 16, a horizontal surface 17, and a second vertical surface 18. The horizontal surface 17 connects the first vertical surface 16 and the second vertical surface 18, and the first vertical surface 16, the horizontal surface 17, and the second vertical surface 18 form the groove 11. In this embodiment, the first vertical surface 16, the second vertical surface 18, and the horizontal surface 17 form a rectangular groove 11, which can reduce the outward expansion of the inner wall of the groove 11, making the light emission angle smaller and thus better reducing the risk of color distortion at large viewing angles. The first vertical surface 16 can also be provided with serrations 15.

[0034] Furthermore, in some embodiments, see Figure 8As shown, the bracket 1 is fixed with six independent metal pads 6, each of which has a pin; the bracket 1 is fixed with three different colored light-emitting chips 2, and the positive and negative terminals of each light-emitting chip 2 are electrically connected to an independent metal pad 6 respectively. This embodiment provides a 6-pin LED device.

[0035] Furthermore, in one embodiment, see... Figure 9 As shown, the bracket 1 is fixed with four independent metal pads 6, each metal pad 6 having a pin. One metal pad 6 is a common electrode pad, and the remaining metal pads 6 are non-common electrode pads. The bracket 1 is fixed with three different colored light-emitting chips 2, all of which are fixed to the common electrode pad. This embodiment provides a 4-pin LED device. All three light-emitting chips 2 are electrically connected to the common electrode pad, and each of the three light-emitting chips 2 is individually connected to a non-common electrode pad.

[0036] The LED device provided in this embodiment uses a built-in lens, which provides better brightness with the same amount of adhesive. Moreover, the built-in lens consumes less adhesive with the same brightness, saving materials. At the same time, with the same brightness, the built-in lens can improve problems such as large viewing angle deviation and light emission angle by adjusting the reflective adhesive 4.

[0037] This embodiment also provides a display screen that uses the LED device described above. The display screen in this embodiment can use the LED device provided in any of the above embodiments and achieve the corresponding functions, which will not be described in detail here.

[0038] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An LED device, characterized in that, It includes: A bracket (1) is provided with a light-emitting chip (2) fixed inside the bracket (1). A lens colloid (3) is fixed on the light-emitting chip (2). A groove (11) is provided on the periphery of the lens colloid (3) of the bracket (1). The groove (11) is filled with reflective adhesive (4) so ​​that the reflective adhesive (4) surrounds the periphery of the lens colloid (3) and the lens colloid (3) protrudes from the reflective adhesive (4).

2. The LED device as described in claim 1, characterized in that, The highest point A of the inner wall of the bracket (1) in contact with the lens colloid (3) is higher than the lowest point B of the groove (11).

3. The LED device as described in claim 1, characterized in that, A diffuser powder colloid (5) is disposed below the lens colloid (3), and the diffuser powder colloid (5) surrounds the light-emitting chip (2).

4. The LED device as described in claim 3, characterized in that, The inner wall of the support (1) has a first inclined surface (12), and the diffuser powder colloid (5) and the lens colloid (3) are both filled in the cavity enclosed by the first inclined surface (12); The inner wall of the bracket (1) also has a second inclined surface (13) and a third inclined surface (14). The second inclined surface (13) connects the first inclined surface (12) and the third inclined surface (14). The second inclined surface (13) and the third inclined surface (14) have opposite inclination directions, and the second inclined surface (13) and the third inclined surface (14) form the groove (11). The third inclined surface (14) has the same inclination direction as the first inclined surface (12).

5. The LED device as described in claim 4, characterized in that, The third inclined surface (14) is provided with serrations (15).

6. The LED device as described in claim 4, characterized in that, The second inclined plane (13) forms a sharp angle at the connection with the first inclined plane (12).

7. The LED device as described in claim 1, characterized in that, The inner wall of the bracket (1) has a first vertical surface (16), a horizontal surface (17), and a second vertical surface (18). The horizontal surface (17) connects the first vertical surface (16) and the second vertical surface (18), and the first vertical surface (16), the horizontal surface (17), and the second vertical surface (18) form the groove (11).

8. The LED device as described in claim 1, characterized in that, The bracket (1) is fixed with 6 independent metal pads (6), each of which has a pin; The bracket (1) is fixed with three different colored light-emitting chips (2), and the positive and negative terminals of each light-emitting chip (2) are electrically connected to an independent metal pad (6).

9. The LED device as described in claim 1, characterized in that, The bracket (1) is fixed with four independent metal pads (6), each of which has a pin, one of which is a common electrode pad and the rest are non-common electrode pads; The bracket (1) is fixed with three different colored light-emitting chips (2), and all the light-emitting chips (2) are fixed to the common electrode pad.

10. A display screen, characterized in that, It employs the LED device as described in claim 1.

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