CN217822854U - light emitting device - Google Patents

Abstract

The utility model provides a light emitting device. The light emitting device includes a substrate, a control element, a light reflection layer and a light emitting element. The control element is arranged on the substrate and has an upper surface, a lower surface and four side surfaces, wherein the lower surface faces the substrate, the upper surface is opposite to the lower surface, and the side surfaces connect the upper surface and the lower surface. The light reflection layer covers the control element and contacts the upper surface and the side surface. The light emitting element is arranged on the substrate.

Description

light emitting device

technical field

The utility model relates to a light emitting device. More specifically, the present invention relates to a lighting device with a control element.

Background technique

With the advancement of science and technology, people's requirements for light-emitting devices are increasing day by day, not only requiring high luminous efficacy, but also requiring low power consumption. Therefore, light-emitting diode (LED) technology has attracted more and more attention. The advantages of light-emitting diodes are high luminous efficiency, fast response time, long service life and no mercury. In addition, light-emitting diodes also have the advantages of resistance to mechanical shock, small size, and wide color gamut. Therefore, light-emitting diodes are gradually replacing traditional light-emitting devices. With the rapid development of light-emitting diodes in recent years, the application fields of light-emitting diodes have been greatly expanded, and they have become a new type of light source in the 21st century. As far as the application of the light source is concerned, the luminous efficiency is a key product specification, so many researchers are devoted to improving the luminous efficiency of LEDs.

However, according to the miniaturization requirements of the light-emitting device, the light-emitting diode and the chip controlling the light-emitting diode are often adjacent to each other, which will cause a dark area in the light-emitting device, and the light provided by the light-emitting diode may also be absorbed by the chip, resulting in a decrease in luminous efficiency. Therefore, how to solve the foregoing problems becomes an important issue.

Utility model content

The purpose of the present utility model is to provide a light emitting device to solve at least one of the above problems.

In order to solve the above known problems, the utility model provides a light emitting device, which includes a substrate, a control element, a light reflection layer and a light emitting element. The control element is arranged on the substrate and has an upper surface, a lower surface and four side surfaces, wherein the lower surface faces the substrate, the upper surface is opposite to the lower surface, and the side surfaces connect the upper surface and the lower surface. The light reflection layer covers the control element and contacts the upper surface and the side surface. The light emitting element is arranged on the substrate.

In some embodiments of the present invention, the light-emitting device further includes a light-transmitting layer disposed on the substrate and covering the light-reflecting layer and the light-emitting element. A gap is formed between the light reflection layer and a top surface of the light transmission layer.

In some embodiments of the present invention, the aforementioned side surface includes a first side surface and a second side surface, and the light reflection layer includes a first side edge, a second side edge and a top side edge. The first side surface, the second side surface and the upper surface face the first side edge, the second side edge and the top side edge, respectively. The distance between the first side surface and the first side edge is approximately the same as the distance between the second side surface and the second side edge. The distance between the upper surface and the top side edge is greater than or equal to the distance between the first side surface and the first side edge. In some embodiments, the distance between the top surface and the top side edge is smaller than the distance between the first side surface and the first side edge.

In some embodiments of the present invention, the aforementioned light reflection layer includes a covering portion, and the covering portion generally has a cuboid structure.

In some embodiments of the present invention, the aforementioned light reflection layer further includes an extension portion connected to and surrounding the covering portion, wherein the thickness of the extension portion is smaller than the thickness of the covering portion.

In some embodiments of the present invention, the aforementioned light reflection layer generally has a spherical segment structure, and the diameter of the spherical segment structure is approximately 1 mm to 3 mm.

In some embodiments of the present invention, the thickness of the aforementioned light reflection layer is approximately between 150 microns and 200 microns.

In some embodiments of the present invention, the aforementioned light reflection layer is more in contact with the lower surface of the control element.

In some embodiments of the present invention, the aforementioned light reflection layer includes semi-hardened stage (B-stage) colloid, silicon, resin or acrylic.

In some embodiments of the present invention, the aforementioned control element includes a chip and a coating layer, the coating layer covers the chip, and the light reflection layer covers the coating layer, wherein the coating layer can include titanium dioxide, boron oxide or silicon. In some embodiments, the control element includes a chip, and the reflective layer directly contacts the chip. In some embodiments, the control element includes a chip and a glass substrate, the chip is disposed on the glass substrate, and the light reflection layer covers the chip and the glass substrate.

The utility model also provides a light emitting device, which includes a substrate, a control element, a light reflection layer and a plurality of light emitting elements. The control element is arranged on the substrate. The light reflective layer covers the control element. The light emitting element is arranged on the substrate. Wherein, at least part of the light-emitting elements are arranged in a range, the control element is adjacent to the range, and the control element is electrically connected with the light-emitting elements in the range.

In some embodiments of the present invention, the aforementioned light-emitting element further includes another control element and another light reflection layer. Another control element is disposed on the substrate, and another light reflection layer covers the other control element. At least part of the light-emitting element is arranged in another range, another control element is adjacent to the other range, and the other control element is electrically connected to the light-emitting element in the other range. Wherein, the light reflection layer roughly has a cuboid structure, and the other light reflection layer roughly has a spherical structure.

Description of drawings

Embodiments of the present utility model can be better understood according to the following detailed description and accompanying drawings. It should be noted that, in accordance with the standard practice in the industry, various features in the drawings have not necessarily been drawn to scale. In fact, the dimensions of the various features may be arbitrarily expanded or reduced for clarity of illustration.

FIG. 1 is a schematic diagram of a light emitting device according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view along A-A direction in Fig. 1 .

FIG. 3 is a schematic diagram of a control element and a light reflection layer in an embodiment of the present invention.

Fig. 4 is a cross-sectional view along B-B direction in Fig. 1 .

FIG. 5 is a schematic diagram of a light emitting device in another embodiment of the present invention.

FIG. 6 is a schematic diagram of a light emitting device in another embodiment of the present invention.

FIG. 7 is a schematic diagram of a light emitting device in another embodiment of the present invention.

Figure 8A is a schematic diagram of a control element and a light reflective layer in some embodiments of the present invention.

Figure 8B is a schematic diagram of the control element and the light reflective layer in some embodiments of the present invention.

FIG. 8C is a schematic diagram of control elements and light reflective layers in some embodiments of the present invention.

The reference signs are as follows:

100: Substrate

200: control element

201: upper surface

202: lower surface

203: side surface

203A: first side surface

203B: second side surface

203C: third side surface

203D: fourth side surface

210: chip

220: cladding layer

230: glass substrate

300: light emitting element

400: light reflection layer

401: First side edge

402: Second side edge

403: third side edge

404: Fourth side edge

405: top side edge

410: cladding department

420: Extension

500: light penetrating layer

501: top surface

600: Optical film

700: fluorescent glue

A1,A2,A3,A4,B1,B2: range

D1,D2,D3,D4,D5: distance

E: light emitting device

G: Gap

T1, T2: Thickness

Detailed ways

The fixing mechanism of the present invention will be described below. It should be readily appreciated, however, that the present invention provides many suitable inventive concepts that can be implemented in a wide variety of specific contexts. The disclosed specific embodiments are only used to illustrate the use of the utility model in a specific way, and are not intended to limit the scope of the utility model.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It can be understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the background or context of the related technology and the present utility model, and should not be interpreted in an idealized or over-formal means of interpretation, unless otherwise defined herein.

The following disclosure in this specification is a specific example describing each component and its arrangement, in order to simplify the description of the utility model. Of course, these specific examples are not intended to limit the present invention. For example, if the following disclosure in this specification describes that a first feature is formed on or above a second feature, it means that it includes the embodiment in which the above-mentioned first feature and the above-mentioned second feature are formed in direct contact , also includes an embodiment in which additional features may be formed between the above-mentioned first feature and the above-mentioned second feature, so that the above-mentioned first feature and the above-mentioned second feature may not be in direct contact. Furthermore, to facilitate describing the relationship of one feature to another in the drawings, spatially relative terms such as "below", "under", "under", "above", "over" and similar terms may be used. Wait. Spatially relative terms encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise positioned (rotated 90 degrees or at other orientations) as well, and the spatially relative descriptions used herein should be read accordingly.

1 to 4 are schematic diagrams of a light emitting device E according to an embodiment of the present invention. The aforementioned light-emitting device E can be used in various electronic devices with display functions, such as public information display (public information display, PID), television (television), monitor (monitor), tablet computer (tablet computer), smart phone ( smart phone), smart watch (smart watch) or car display, etc., but not limited thereto.

Fig. 2 is a sectional view along the direction A-A in Fig. 1 . As shown in Figures 1 and 2, the light emitting device E mainly includes a substrate 100, a plurality of control elements 200, a plurality of light emitting elements 300, a plurality of light reflection layers 400, a light transmission layer 500, a plurality of optical films 600 and A plurality of fluorescent glue 700.

The control element 200 is disposed on the substrate 100 . For example, the control element 200 may be an integrated circuit (IC), which may include a fan out structure, and may have at least one metal contact. The control element 200 may have an upper surface 201, a lower surface 202 and four side surfaces 203, wherein the lower surface 202 faces the substrate 100 and is in contact with the substrate 100, the upper surface 201 is opposite to the lower surface 202, and the side surfaces 203 are connected to the upper surface 201 and lower surface 202 . In this embodiment, the control element 200 has a substantially cuboid structure, so the upper surface 201 and the lower surface 202 are substantially perpendicular to the four side surfaces 203 , and the four side surfaces 203 are also perpendicular to each other.

The light emitting element 300 is also disposed on the substrate 100 . For example, the light-emitting element 300 can be a light-emitting diode (light-emitting diode, LED), including an inorganic light-emitting diode, an organic light-emitting diode (Organic Light-Emitting Diode, OLED), a submillimeter light-emitting diode (mini LED), a micro light-emitting diode (micro LED), Quantum Dots Light-Emitting Diode (Quantum Dots Light-Emitting Diode, QLED or QD-LED), other suitable light-emitting diodes or combinations thereof, but not limited thereto. The light emitting element 300 may be located in a plurality of different ranges separated from each other. In this embodiment, the light-emitting elements 300 can be respectively located in the ranges A1, A2, A3, A4, B1, and B2, and one of the aforementioned control elements 200 can be disposed adjacent to the ranges A1, A2, A3, and A4, and The light-emitting elements 300 in the ranges A1 , A2 , A3 , and A4 can be electrically connected through the circuits on the substrate 100 . The control element 200 can control the light emitting elements 300 in the ranges A1, A2, A3, A4 to make the light emitting elements 300 in the ranges A1, A2, A3, A4 emit light or stop emitting light.

Please refer to FIG. 2 and FIG. 3 together. The light reflective layer 400 is disposed on the substrate 100 and covers the control element 200 . Specifically, the light reflective layer 400 can contact the upper surface 201, the four side surfaces 203 and part of the substrate 100 of the control element 200, therefore, the control element 200 will be completely covered by the light reflective layer 400 and will not be reflected from light. Layer 400 is revealed. The light reflection layer 400 may include, for example, B-stage colloid, silicon, resin or acrylic. Since the light reflective layer 400 is generally white, it can avoid the dark area at the position of the control element 200 when the light emitting device E is in operation, thereby improving the luminous efficiency and brightness.

In this embodiment, the light reflection layer 400 roughly has a cuboid structure, and includes a first side edge 401, a second side edge 402, a third side edge 403, a fourth side edge 404 and A top side edge 405. The side surfaces 203 of the control element 200 facing the first side edge 401 , the second side edge 402 , the third side edge 403 and the fourth side edge 404 may be defined as a first side surface 203A, a second side surface 203A, and a side surface 203A, respectively. surface 203B, third side surface 203C, and fourth side surface 203D. The distance D1 between the first side edge 401 and the first side surface 203A may be substantially the same as the distance D2 between the second side edge 402 and the second side surface 203B, the third side edge 403 and the third side surface The distance D3 between 203C and the distance D4 between the fourth side edge 404 and the fourth side surface 203D, so that the light emitting device E can produce uniform brightness. The distance D5 between the top side edge 405 and the upper surface 201 may be greater than or equal to the distance D1 between the first side edge 401 and the first side surface 203A to enhance the effect of reducing dark areas. In some embodiments, the distance D5 between the top side edge 405 and the upper surface 201 may be smaller than the distance D1 between the first side edge 401 and the first side surface 203A, so as to reduce the thickness of the light emitting device E to facilitate light emission Miniaturization/thin design of device E.

In this embodiment, the light emitting element 300 can emit white light, and the fluorescent glue 700 can cover the light emitting element 300 . In this way, the light provided by the light emitting element 300 can be converted into light of a desired color (such as blue light, red light or green light) after passing through the fluorescent glue 700 .

The light-transmitting layer 500 is disposed on the substrate 100 and covers the light-reflecting layer 400 and the fluorescent glue 700 . The optical film 600 is disposed on the top surface 501 of the light-transmitting layer 500 such that the light-transmitting layer 500 is located between the optical film 600 and the substrate 100 . In particular, a gap G is formed between the light reflection layer 400 and the top surface 501 of the light transmission layer 500 , so part of the light from the light emitting element 300 can be mixed in the gap G, thereby improving the light emitting effect of the light emitting device E. In this embodiment, the thickness of the light-transmitting layer 500 is about 25 mm, and the thickness of the light-reflecting layer 400 can be between 150 micrometers and 200 micrometers, so as to improve the light mixing efficiency.

The aforementioned optical film 600 may include, for example, a diffusion film, a brightness enhancement film and/or a polarizing film, but is not limited thereto.

Fig. 4 is a cross-sectional view along B-B direction in Fig. 1 . As shown in FIGS. 1 and 4 , in this embodiment, another control element 200 can be disposed adjacent to the range B1, B2, and can communicate with the light emitting element 300 in the range B1, B2 through the circuit on the substrate 100. electrical connection. The control element 200 can control the light emitting elements 300 within the ranges B1 and B2 to make the light emitting elements 300 within the ranges B1 and B2 emit light or stop emitting light. The light reflective layer 400 covering the control element 200 may roughly have a spherical segment structure, and its diameter is approximately between 1 mm to 3 mm, so the gap G between the light reflective layer 400 and the top surface 501 of the light penetrating layer 500 is also Can produce good mixed light effect. In addition, the fluorescent glue 700 covering the light-emitting elements 300 within the ranges B1 and B2 may also have a corresponding spherical structure.

Please refer to FIG. 5 , in some embodiments, the light emitting element 300 can directly emit light of a desired color (such as blue light, red light or green light), so the fluorescent glue 700 can be omitted. In addition, the optical film 600 can also be omitted or added as required.

Please refer to FIG. 6 , in some embodiments, the metal contacts of the control element 200 protrude from the lower surface 202 of the control element 200, and the light reflective layer 400 can contact the lower surface 202 of the control element 200 to enhance the effect of reducing dark areas. .

Please refer to FIG. 7 , in some embodiments, the light reflection layer 400 includes a covering portion 410 and an extending portion 420, wherein the covering portion 410 covers the control element 200 and generally has a rectangular parallelepiped structure, and the extending portion 420 connects and It surrounds the aforementioned cladding portion 410 and is in contact with the substrate 100 . The thickness T1 of the covering part 410 is greater than the thickness T2 of the extension part 420 . Through the aforementioned structure, the light emitting effect of the light emitting device E can be further improved.

The control elements 200 in the foregoing embodiments can use different control elements 200 according to requirements. For example, as shown in FIG. 8A , in some embodiments, the control element 200 may include a chip 210 and a cladding layer 220 . The cladding layer 220 covers the chip 210 , and the light reflection layer 400 covers the cladding layer 220 . The cladding layer 220 may include, for example, titanium dioxide (TiO ₂ ), boron oxide (BN) or silicon dioxide (SiO ₂ ), but is not limited thereto.

As shown in FIG. 8B , in some embodiments, the control element 200 may only include a chip 210 , and the light reflective layer 400 may cover and directly contact the chip 210 . As shown in FIG. 8C , in some embodiments, the control element 200 may include a chip 210 and a glass substrate 230, the chip 210 may be disposed on the glass substrate 230, and the light reflective layer 400 may cover and directly contact the chip 210 and the glass substrate 230. glass substrate 230 .

As long as the features of the aforementioned embodiments do not violate the spirit of the invention or conflict with each other, they can be mixed and matched arbitrarily.

To sum up, the present invention provides a light emitting device, which includes a substrate, a control element, a light reflection layer and a light emitting element. The control element is arranged on the substrate and has an upper surface, a lower surface and four side surfaces, wherein the lower surface faces the substrate, the upper surface is opposite to the lower surface, and the side surfaces connect the upper surface and the lower surface. The light reflection layer covers the control element and contacts the upper surface and the side surface. The light emitting element is arranged on the substrate.

The utility model also provides a light emitting device, which includes a substrate, a control element, a light reflection layer and a plurality of light emitting elements. The control element is arranged on the substrate. The light reflective layer covers the control element. The light emitting element is arranged on the substrate. Wherein, at least part of the light-emitting elements are arranged in a range, the control element is adjacent to the range, and the control element is electrically connected with the light-emitting elements in the range.

Although the embodiments of the present invention and their advantages have been disclosed above, it should be understood that those skilled in the art may make changes, substitutions and modifications without departing from the spirit and scope of the present invention. In addition, the protection scope of the present utility model is not limited to the process, machine, manufacture, material composition, device, method and steps in the specific embodiments described in the description, any person skilled in the art can learn from the disclosure of the utility model It is understood that the current or future developed processes, machines, manufactures, material compositions, devices, methods and steps can be used according to the present invention as long as they can perform roughly the same functions or obtain roughly the same results in the embodiments described here . Therefore, the protection scope of the present utility model includes the above-mentioned process, machine, manufacture, composition of matter, device, method and steps. In addition, each claim constitutes an individual embodiment, and the protection scope of the present invention also includes the combination of each claim and the embodiment.

Although the present invention is disclosed above with the aforementioned several preferred embodiments, they are not intended to limit the present invention. Those skilled in the technical field to which the utility model belongs may make some changes and modifications without departing from the spirit and scope of the utility model. Therefore, the scope of protection of the present utility model should be defined by the appended claims. In addition, each claim constitutes an independent embodiment, and combinations of various claims and embodiments fall within the scope of the present invention.

Claims (19)

1. A light-emitting device, comprising:

a substrate;

a control element disposed on the substrate and having an upper surface, a lower surface and four side surfaces, wherein the lower surface faces the substrate, the upper surface is opposite to the lower surface, and the side surfaces connect the upper surface and the lower surface;

a light reflecting layer, which covers the control element and contacts the upper surface and the plurality of side surfaces; and

a light emitting element disposed on the substrate.

2. The light-emitting device according to claim 1, further comprising a light-transmissive layer disposed on the substrate and covering the light-reflective layer and the light-emitting element.

3. The light-emitting device according to claim 2, wherein a gap is formed between the light-reflecting layer and a top surface of the light-transmitting layer.

4. The light-emitting device according to claim 1, wherein the plurality of side surfaces includes a first side surface and a second side surface, and the light-reflecting layer includes a first side edge and a second side edge, wherein the first side surface and the second side surface face the first side edge and the second side edge, respectively, and a distance between the first side surface and the first side edge is the same as a distance between the second side surface and the second side edge.

5. The light-emitting device according to claim 1, wherein the plurality of side surfaces includes a first side surface, and the light-reflecting layer includes a first side edge and a top edge, wherein the first side surface and the top surface face the first side edge and the top edge, respectively, and a distance between the top surface and the top edge is greater than or equal to a distance between the first side surface and the first side edge.

6. The light-emitting device according to claim 1, wherein the plurality of side surfaces includes a first side surface, and the light-reflecting layer includes a first side edge and a top side edge, wherein the first side surface and the top surface face the first side edge and the top side edge, respectively, and a distance between the top surface and the top side edge is smaller than a distance between the first side surface and the first side edge.

7. The light-emitting device according to claim 1, wherein the light-reflecting layer includes a cladding portion, and the cladding portion has a rectangular parallelepiped structure.

8. The light-emitting device according to claim 7, wherein the reflector layer further comprises an extension portion connected to and surrounding the cladding portion, wherein the extension portion has a thickness smaller than that of the cladding portion.

9. The light-emitting device according to claim 1, wherein the reflector layer has a spherical segment structure.

10. The light-emitting device according to claim 9, wherein the diameter of the segment structure is between 1 mm and 3 mm.

11. The light-emitting device according to claim 1, wherein the light-reflecting layer has a thickness of 150 to 200 μm.

12. The light-emitting device according to claim 1, wherein the reflector layer further contacts the bottom surface of the control element.

13. The light-emitting device according to claim 1, wherein the light-reflecting layer comprises semi-cured stage glue, silicon, resin or acryl.

14. The light-emitting device according to claim 1, wherein the control element comprises a chip and a cladding layer, the cladding layer covers the chip, and the light-reflecting layer covers the cladding layer.

15. The light-emitting device according to claim 14, wherein the clad layer comprises titanium dioxide, boron oxide, or silicon dioxide.

16. The light-emitting device according to claim 1, wherein the control element comprises a chip, and the reflector layer directly contacts the chip.

17. The light-emitting device according to claim 1, wherein the control element comprises a chip and a glass substrate, the chip is disposed on the glass substrate, and the light-reflecting layer covers the chip and the glass substrate.

18. A light-emitting device, comprising:

a substrate;

a control element disposed on the substrate;

a light reflection layer for coating the control element; and

the light-emitting elements are arranged on the substrate, at least part of the light-emitting elements are arranged in a range, the control element is adjacent to the range, and the control element is electrically connected with the light-emitting elements in the range.

19. The light-emitting device according to claim 18, wherein the light-emitting element further comprises:

another control element disposed on the substrate; and

and the other light reflecting layer coats the other control element, wherein at least part of the light emitting elements are arranged in another range, the other control element is adjacent to the another range, and the other control element is electrically connected with the light emitting elements in the another range, wherein the light reflecting layer has a cuboid structure, and the other light reflecting layer has a spherical segment structure.

Images