CN217134399U

CN217134399U - LED light-emitting device

Info

Publication number: CN217134399U
Application number: CN202123382245.XU
Authority: CN
Inventors: 吴冬梅
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-08-05
Anticipated expiration: 2031-12-30

Abstract

The application provides a LED light emitting device, includes: base plate, LED granule and lens, LED granule paste and adorn on the base plate, the lower surface of LED granule and the last fixed surface of base plate, LED granule encapsulation in the lens, its characterized in that, do not have the clearance between lens and the LED granule, promptly lens only has this optical surface of upper surface, the lower surface of lens and the last fixed surface of base plate, the upper surface of lens comprises middle part and side, and the middle part is concave arc or class toper, and the upper surface of lens is refracting surface or the middle part of upper surface is the plane of reflection, the side is for going out the plain noodles.

Description

LED light-emitting device

Technical Field

The utility model relates to a display device technical field, more specifically relates to a LED luminescent device.

Background

The backlight module of the television or the computer display device is divided into an edge type backlight module and a direct type backlight module, and the edge type backlight module is the biggest difference between the edge type backlight module and the direct type backlight module; meanwhile, the direct type backlight module adopts an LED backlight source to make an intensive dot matrix, is placed behind a screen, directly irradiates the screen, and forms a uniform luminous surface light source after light is homogenized by an optical film, so that the direct type backlight module is clear in image quality and good in picture effect, and is widely applied.

Direct type backlight module, generally from the bottom up includes: backplate, LED backlight, diffuser plate, other optics diaphragms, LED backlight includes a plurality of LED luminescent device, adopts LED luminescent device to make intensive dot matrix, and LED luminescent device includes: the direct type backlight module adopts the light emitted by the LED backlight source to directly irradiate a screen, namely the light is directly scattered, so that the required light mixing height is higher, the thickness of the direct type backlight module is larger than that of the side type backlight module, and the thinning is always difficult. The LED light-emitting device generally comprises a substrate and LED particles, and in order to pursue the slimness of the direct type backlight module, the LED light-emitting device can be pasted with a lens above the LED particles, however, the traditional process for pasting the lens adopts an SMT (surface mount technology) pasting mode to paste the lens above the LED particles, so that the process requirement is high, the output in unit time is too little, the production efficiency is low, and the cost is high; and the light is not very even, and the light right above the LED particles is strong, forming light spots.

In view of this, the utility model provides a LED luminescent device, production efficiency is high, and is with low costs to the light that sends is even.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a LED luminescent device, production efficiency is high, and is with low costs to the light that sends is even.

An LED light emitting device comprising: the LED light source comprises a substrate 1, LED particles 2 and a lens 3, wherein the LED particles 2 are attached to the substrate, the lower surfaces of the LED particles 2 are fixed with the upper surface of the substrate 1, and the LED particles 2 are packaged in the lens 3. the LED light source is characterized in that no gap exists between the lens 3 and the LED particles 2, namely, the lens 3 only has an optical surface of an upper surface 31, the lower surface of the lens 3 is fixed with the upper surface of the substrate 1, the upper surface 31 of the lens 3 consists of a middle part 311 and a side surface 312, the middle part 311 is in a concave arc shape or a cone shape, the upper surface 31 of the lens 3 is a refraction surface or the middle part 311 of the upper surface 31 is a reflection surface, and the side surface 312 is a light-emitting surface.

In some embodiments, the upper surface 31 of the lens 3 is a refractive surface, the middle portion 311 of the upper surface 31 is a concave arc, the side surface 312 is an arc, an included angle a between a light ray refracted from the upper surface 31 of the lens 3 by a central light ray emitted by the LED particle 2 and a vertical line of the LED particle 2 is a, the included angle a < 60 ° is the middle portion 311 of the upper surface 31, and the slope of a tangent line passing through a point on the curve of the upper surface 31 is greater than 0; the included angle a is more than or equal to 60 degrees, the side surface 312 of the upper surface, the slope of the tangent line of the point of the side surface 312 passing through the curve is less than 0, the slope is less than 0, and the slope is more than 0.

Further preferably, the slope of the tangent to the side 312 through a point on the curve is < 0.

Further, the central portion 311 takes the vertical line of the LED particle 2 as the center line, and the included angle a of the light refracted by the central portion 311 gradually increases, that is, the slope of the curve of the central portion 311 along one direction gradually decreases as a whole, or the slope of the fine portion is adjusted slightly in a fluctuating manner.

Further, the larger the distance between the middle portion 311 and the midpoint of the LED particle 2, the larger the thickness of the middle portion 311.

Further, the included angle a of the light refracted by the side surface 312 gradually increases, and after the slope of the curve of the side surface 312 gradually becomes a negative number, the absolute value of the slope gradually increases.

In some embodiments, the middle portion 311 of the upper surface 31 is a reflective surface, the side surface 312 is a light-emitting surface, the middle portion 311 is a cone-like shape, and the side surface 312 is a linear or multi-segment curve, the middle portion 311 totally reflects the central light emitted from the LED particle 2 and then emits the central light from the side surface 312, the multi-segment curve of the side surface 312 is matched to adjust the direction and angle of the emitted light, and the slope of all portions of the 312 broken line is kept to be less than or equal to 0.

The light is totally reflected by the reflecting surface of the middle portion 311 and then emitted from the side surface 312, so that the brightness right above the LED particles can be reduced, and light spots scattered right above the LED particles can be reduced.

In some embodiments, the lens 3 is directly molded by a curing adhesive, the curing adhesive is a thermal curing adhesive or a UV curing adhesive, and the curing adhesive is a transparent adhesive made of one or more of pure silica gel, silicone resin and epoxy resin.

In some embodiments, the substrate 1 is a composite of one or more of a PCB substrate, an FPC substrate, a glass substrate, a polyimide substrate, a transparent polyimide substrate, and a polyester resin substrate.

Further preferably, the substrate 1 is a PCB substrate 11 or an FPC substrate 12, when the substrate 1 is the PCB substrate 11, the lower surface of the LED particle 2 is fixed to the upper surface of the PCB substrate 11, when the substrate 1 is the FPC substrate 12, the lower surface of the FPC substrate 12 is fixed to the rear panel 4, the lower surface of the LED particle 2 is fixed to the upper surface of the FPC substrate 12, the FPC substrate 12 has a through hole for accommodating an edge portion of the lens 3, the middle portion of the lower surface of the lens 3 is fixed to the upper surface of the FPC substrate 12, and the edge portion of the lower surface of the lens 3 is fixed to the upper surface of the rear panel 4.

Further, the substrate 1 is provided with a plurality of LED particles 2 and lenses 3, and the number of the LED particles 2 and the number of the lenses 3 are the same.

Further, the LED particle 2 is an LED chip or an LED package, the LED chip is one or a group of LED chips, and the LED chip includes: the LED chip comprises a blue LED chip, a red LED chip, a green LED chip, a blue-green LED chip, a yellow LED chip, an orange LED chip, an amber LED chip, or a chip with surface coated with fluorescent powder, or is a white LED particle.

Drawings

Fig. 1 is a schematic structural view of an LED light-emitting device according to embodiment 1 of the present application.

Fig. 2 is a schematic view of an optical path of the LED light-emitting device according to embodiment 1 of the present application.

Fig. 3 is a schematic structural view of an LED light-emitting device according to embodiment 2 of the present application.

Fig. 4 is a schematic view of an optical path of an LED light-emitting device according to embodiment 2 of the present application.

Description of main component symbols:

substrate 1, LED granule 2, lens 3, backplate 4, upper surface 31, middle part 311, side 312, PCB base plate 11, FPC base plate 12.

Detailed Description

The following examples are described to aid in the understanding of the present application and are not, and should not be construed to, limit the scope of the present application in any way.

In the following description, those skilled in the art will recognize that components may be described throughout this discussion as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including being integrated within a single system or component).

Also, connections between components or systems are not intended to be limited to direct connections. Rather, data between these components may be modified, reformatted, or otherwise changed by the intermediate components. Additionally, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" and "fixed" are understood to encompass direct connections, indirect connections, or fixed through one or more intermediaries. In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "side", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are commonly known or used in the product of the application, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Example 1:

an LED light emitting device, as shown in fig. 1-2, comprising: the LED light source comprises a substrate 1, LED particles 2 and a lens 3, wherein the LED particles 2 are attached to the substrate, the lower surfaces of the LED particles 2 are fixed to the upper surface of the substrate 1, and the LED particles 2 are packaged in the lens 3. the LED light source is characterized in that no gap exists between the lens 3 and the LED particles 2, namely, the lens 3 only has an optical surface of an upper surface 31, the lower surface of the lens 3 is fixed to the upper surface of the substrate 1, the upper surface 31 of the lens 3 consists of a middle portion 311 and a side surface 312, the middle portion 311 is in a concave arc shape, and the upper surface 31 of the lens 3 is a refraction surface.

The upper surface 31 of the lens 3 is a refraction surface, the middle part 311 of the upper surface 31 is a concave arc, the side surface 312 is an arc, an included angle a between a light ray refracted by the central light ray emitted by the LED particle 2 from the upper surface 31 of the lens 3 and a vertical line of the LED particle 2 is a, the included angle a is less than 60 degrees, the middle part 311 of the upper surface 31 is defined, and the slope of a tangent line of the upper surface 31 passing through a point on the curve is more than 0; the included angle a is more than or equal to 60 degrees, the side surface 312 of the upper surface, the slope of the tangent line of the point of the side surface 312 passing through the curve is less than 0, the slope is less than 0, and the slope is more than 0. The middle part 311 takes the vertical line of the LED particle 2 as the center line, and the included angle a of the light refracted by the middle part 311 gradually increases, that is, the slope of the curve of the middle part 311 along one direction gradually decreases as a whole, or the slope at a fine position is adjusted slightly in a fluctuating manner. The larger the distance between the concave arc-shaped middle portion 311 and the midpoint of the LED particle 2, the larger the thickness of the middle portion 311. The included angle a of the light refracted by the side surface 312 gradually increases, and after the slope of the curve of the side surface 312 gradually becomes a negative number, the absolute value of the slope gradually increases.

The lens 3 is directly molded through curing glue, the curing glue is thermosetting glue, the curing glue is transparent glue made of pure silica gel and epoxy resin, the substrate 1 is an FPC substrate 12, the lower surface of the FPC substrate 12 is fixed with the back plate 4, the lower surface of the LED particles 2 is fixed with the upper surface of the FPC substrate 12, the FPC substrate 12 is provided with a through hole for accommodating the edge of the lens 3, the middle part of the lower surface of the lens 3 is fixed with the upper surface of the FPC substrate 12, and the edge of the lower surface of the lens 3 is fixed with the upper surface of the back plate 4. The substrate 1 is provided with a plurality of LED particles 2 and lenses 3, and the number of the LED particles 2 and the number of the lenses 3 are the same. The LED particles 2 comprise LED chips and a support, the LED chips are in a group, and the LED chips comprise blue LED chips, red LED chips and green LED chips.

Example 2:

an LED light emitting device, as shown in fig. 3-4, comprising: the LED light source comprises a substrate 1, LED particles 2 and a lens 3, wherein the LED particles 2 are attached to the substrate, the lower surfaces of the LED particles 2 are fixed with the upper surface of the substrate 1, and the LED particles 2 are packaged in the lens 3, and the LED light source is characterized in that no gap exists between the lens 3 and the LED particles 2, namely the lens 3 only has an optical surface of an upper surface 31, the lower surface of the lens 3 is fixed with the upper surface of the substrate 1, the upper surface 31 of the lens 3 consists of a middle part 311 and a side surface 312, the middle part 311 is conical, the middle part 311 of the upper surface 31 is a reflecting surface, and the side surface 312 is a light-emitting surface.

The middle part 311 of the upper surface 31 is a reflecting surface, the side surface 312 is a light-emitting surface, the middle part 311 is a cone-like shape, the side surface 312 is a linear or multi-segment curve, the middle part 311 totally reflects the central light emitted by the LED particles 2 and then emits the central light from the side surface 312, the multi-segment line of the side surface 312 is matched to adjust the direction and angle of the emitted light, and the slope of all parts of the 312 multi-segment line is kept to be less than or equal to 0. The light is totally reflected by the reflecting surface of the middle portion 311 and then emitted from the side surface 312, so that the brightness right above the LED particles can be reduced, and light spots scattered right above the LED particles can be reduced. The larger the distance between the conical middle portion 311 and the midpoint of the LED particle 2, the larger the thickness of the middle portion 311.

The lens 3 is directly molded by curing adhesive through compression molding, and the curing adhesive is UV curing adhesive. The substrate 1 is a PCB substrate 11, and the lower surface of the LED particles 2 is fixed with the upper surface of the PCB substrate 11. The substrate 1 is provided with a plurality of LED particles 2 and lenses 3, and the number of the LED particles 2 and the number of the lenses 3 are the same. The LED particles 2 comprise LED chips and a support, the LED chips are in a group, and the LED chips are blue LED chips, red LED chips and green LED chips.

While various aspects and embodiments have been disclosed herein, it will be apparent to those skilled in the art that other aspects and embodiments can be made without departing from the spirit of the disclosure, and that several modifications and improvements can be made without departing from the spirit of the disclosure. The various aspects and embodiments disclosed herein are presented by way of example only and are not intended to limit the present disclosure, which is to be controlled in the spirit and scope of the appended claims.

Claims

1. An LED light emitting device comprising: the LED light source comprises a substrate (1), LED particles (2) and a lens (3), wherein the LED particles (2) are attached to the substrate, the lower surface of the LED particles (2) is fixed to the upper surface of the substrate (1), and the LED particles (2) are packaged in the lens (3), and the LED light source is characterized in that no gap exists between the lens (3) and the LED particles (2), namely the lens (3) only has an optical surface of an upper surface (31), the lower surface of the lens (3) is fixed to the upper surface of the substrate (1), the upper surface (31) of the lens (3) consists of a middle part (311) and a side surface (312), the middle part (311) is in a concave arc shape or a cone shape, and the upper surface (31) of the lens (3) is a refraction surface or the middle part (311) of the upper surface (31) is a reflection surface, and the side surface (312) is a light-emitting surface.

2. The LED light emitting device according to claim 1, wherein the upper surface (31) of the lens (3) is a refractive surface, the middle portion (311) of the upper surface (31) is a concave arc, the side surface (312) is an arc, the angle between the light refracted from the upper surface (31) of the lens (3) by the central light emitted from the LED particle (2) and the vertical line of the LED particle (2) is a, the angle a < 60 ° is the middle portion (311) of the upper surface (31), and the slope of the tangent line to the point on the curve of the upper surface (31) is > 0; the included angle a is more than or equal to 60 degrees and is a side surface (312) of the upper surface, the slope of a tangent line of a point of the side surface (312) passing through a curve is less than 0, the slope is less than 0, and the slope is more than 0.

3. The LED light emitting device of claim 2, wherein the central portion (311) is centered on the vertical line of the LED particle (2), and the angle a of the light refracted by the central portion (311) gradually increases, i.e., the slope of the curve of the central portion (311) in one direction gradually decreases as a whole, or the slope at a fine point is adjusted to be slightly fluctuated.

4. A LED lighting device according to claim 3, characterized in that the larger the distance between the central portion (311) and the midpoint of the LED particle (2), the larger the thickness of the central portion (311); the included angle a of the light refracted by the side surface (312) is gradually increased, and after the slope of the curve of the side surface (312) becomes a negative number, the absolute value of the slope is gradually increased.

5. The LED light-emitting device according to claim 1, wherein the middle portion (311) of the upper surface (31) is a reflective surface, the side surface (312) is a light-emitting surface, the middle portion (311) is cone-like, the side surface (312) is linear or multi-segment curve, the middle portion (311) totally reflects the central light emitted from the LED particles (2) and then emits the central light from the side surface (312), the multi-segment curve of the side surface (312) is matched to adjust the direction and angle of the emitted light, and the slope of all parts of the 312 broken line is kept to be less than or equal to 0.

6. An LED lighting device as claimed in claim 5, characterized in that the larger the distance between the central portion (311) and the midpoint of the LED particle (2), the larger the thickness of the central portion (311).

7. The LED light emitting device according to claim 1, wherein the substrate (1) is a composite of one or more substrates of a PCB substrate, an FPC substrate, a glass substrate, a polyimide substrate, a transparent polyimide substrate, a polyester resin substrate.

8. The LED light emitting device of claim 1, wherein the substrate (1) has a plurality of LED particles (2) and lenses (3), and the number of LED particles (2) and lenses (3) is the same.

9. The LED light emitting device of claim 8, wherein the LED particles (2) are LED chips or a LED package, the LED chips being one or a group of LED chips, the LED chips comprising: the LED chip comprises a blue LED chip, a red LED chip, a green LED chip, a blue-green LED chip, a yellow LED chip, an orange LED chip, an amber LED chip, or a chip with surface coated with fluorescent powder, or is a white LED particle.