CN214378487U

CN214378487U - Light-emitting device and module

Info

Publication number: CN214378487U
Application number: CN202023166624.0U
Authority: CN
Inventors: 姚述光; 万垂铭; 曾照明; 龙小凤; 肖国伟
Original assignee: APT Electronics Co Ltd
Current assignee: APT Electronics Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-10-08
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a light-emitting device and a module, wherein the light-emitting device comprises a substrate, a LED chip, a protection wall and a protection layer; the protective wall is connected with the substrate to form a concave part, and the concave surface of the concave part is a luminous surface; the LED chip is arranged on the substrate and positioned in the concave part; the protective layer is filled in the concave part and covers the light emitting surface and the LED chip, and a convex light emitting surface is formed outside the concave part by the protective layer; a convex retaining wall is arranged on the protective wall and along the light emergent surface; the appearance of the light-emitting surface in the overlooking direction is in a shape of a polygon or a round corner transition structure formed by two adjacent sides of the polygon. The utility model provides a light emitting device and module refracts light through the shape of protective layer, realizes increasing the effect of the luminous angle of LED chip.

Description

Light-emitting device and module

Technical Field

The utility model belongs to the technical field of the LED, concretely relates to illuminator and module.

Background

The dynamic dimming technology of the LED backlight source has high contrast and excellent display effect, and is gradually a new favorite in the market of related products of LCD. Dynamic dimming requires multiple zones to control multiple light sources, which leads to a sharp increase in cost in the solution, making the terminal extremely expensive. By increasing the angle of a single backlight, the number of lamps can be reduced so that the system cost can be greatly reduced. How to increase the light emitting angle of a single light source is a problem to be solved at present.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above disadvantages of the prior art, an object of the present invention is to provide a light emitting device, which can increase the light emitting angle of a single light source.

The utility model discloses a reach its purpose, the technical scheme who adopts as follows:

a light emitting device includes a substrate, an LED chip, a protective wall, and a protective layer;

the protective wall is connected with the substrate to form a concave part, and the concave surface of the concave part is a luminous surface;

the LED chip is arranged on the substrate and positioned in the concave part;

the protective layer is filled in the concave part and covers the light emitting surface and the LED chip, and a convex light emitting surface is formed outside the concave part by the protective layer;

a convex retaining wall is arranged on the protective wall and along the light emergent surface;

the appearance of the light-emitting surface in the overlooking direction is in a shape of a polygon or a round corner transition structure formed by two adjacent sides of the polygon.

Preferably, the substrate comprises a positive metal substrate layer and a negative metal substrate layer, and the protection wall is filled around the LED chip and between the positive metal substrate layer and the negative metal substrate layer.

Preferably, the protection wall is vertically disposed on the substrate, and an outermost portion of the protection layer is elliptical.

Preferably, the elliptical shape satisfies X²/a²+Y²/b²1(a > b > 0), a being 1/2 of the width of the protective layer and b being the height of the protective layer.

Preferably, the light emitting surface is in at least one elliptical shape facing the outer edge of the protection wall, and in the at least two elliptical shapes, the values a are different and the values b are the same.

Preferably, the ratio of b/a ranges from 0.4 to 0.8. Too high a ratio will have a light-gathering effect and too low a ratio will not serve the purpose of dispersing light.

Preferably, the height of the contact position between the edge of the protective layer and the protective wall is greater than or equal to the other positions of the protective wall.

Preferably, the material of the protective layer is composed of one or more of silicone resin, silicone rubber and epoxy resin, and the refractive index of the protective layer is preferably greater than 1.3.

Preferably, the protective layer further comprises filler particles made of SiO₂、TiO₂、ZrO₂The weight ratio of the one or more components to the protective layer and the diffusion particles is 0-10%.

Preferably, the protective wall is made of a thermosetting type material or a thermoplastic type material. Specific examples thereof include PCT (polyamide resin), PPA (polyphthalamide), EMC (Epoxy Molding Compound), and SMC (Silicone Molding Compound).

The utility model discloses still include a illuminator's module, including illuminator, PCB, IC drive, diffusion piece, white light conversion layer and brightness enhancement piece.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a light emitting device and module refracts light through the shape of protective layer, realizes increasing the effect of the luminous angle of LED chip. The appearance of the overlooking direction of the light-emitting surface is a polygon or the shape of a fillet transition structure of two adjacent sides of the polygon, so that light can be refracted to emit light along the directions of the sides and the fillets of the polygon, and the light emitting of the side surface of the LED chip is increased. The convex retaining wall is used for preventing the protective layer from being dispersed, and is beneficial to forming the convex light emitting surface.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a sectional view of a light-emitting device according to embodiment 1 of the present invention;

fig. 2 is a plan view of a light-emitting device according to embodiment 1 of the present invention;

fig. 3 is a side view of a light-emitting device according to embodiment 1 of the present invention;

fig. 4 is a top view of a module of the light emitting device of the present invention;

fig. 5 is a cross-sectional view of a module of the light emitting device of the present invention;

fig. 6 is a schematic diagram of a side view of the light refraction of the light emitting device of the present invention;

fig. 7 is a schematic view of the light refraction in the top view of the light emitting device of the present invention;

fig. 8 is a schematic view of the top view of the light emitting device of the present invention in various shapes.

Description of reference numerals:

1-a light-emitting device, 101-an LED chip, 102-a protective wall, 103-a protective layer, 104-a positive electrode metal substrate layer, 105-a negative electrode metal substrate layer, 2-PCB, 3-IC drive, 4-a diffusion sheet, 5-a white light conversion layer and 6-a brightness enhancement film.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and detailed description. In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, and the described embodiments are merely some embodiments, rather than all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1:

referring to fig. 1 to 3, the present invention discloses a light emitting device 1 including a substrate, an LED chip 101, a protective wall 102, and a protective layer 103;

the number of the LED chips 101 is at least one, and the LED chips are arranged on the substrate, and the substrate comprises two positive electrode metal substrate layers 104 and two negative electrode metal substrate layers 105 which are not connected with each other;

the protection wall 102 is made of SMC material, the protection wall 102 is filled around the LED chip 101 and between the positive metal substrate layer 104 and the negative metal substrate layer 105, and is connected to the substrate to form a concave portion, and the concave surface of the concave portion is a light emitting surface;

the outline of the light-emitting surface in the overlooking direction is octagonal;

the protection layer 103 covers the light emitting surface and the LED chip 101 to form a convex light emitting surface, the protection layer 103 is made of silicone resin, the refractive index is 1.5, in this embodiment, the protection layer 103 does not contain filler particles, the outermost portion of the protection layer 103 is in an elliptical shape, and the elliptical shape satisfies X²/a²+Y²/b²1(a > b > 0), a is 1/2 of the width of the protective layer 103, b is the height of the protective layer 103, in this embodiment, there are four ellipses as seen from the side, where two parallel ellipses are nearly the same, as in fig. 1 and 3, the light emitting device 1 has 4 sections as seen from the side, two parallel protective layers 103 as in fig. 1, b/a is 0.46, and two parallel convex protective layers 103 as in fig. 3, b/a is 0.57; the protective layer 103 in this embodiment is manufactured by a mold pressing method; the utility model provides a module of illuminator 1 is as shown in fig. 4, by the utility model discloses an illuminator 1, PCB2, IC drive 3, diffusion piece 4, white light conversion layer 5, brightness enhancement film 6 constitute. In this embodiment, the arrangement of the LED devices is square (see fig. 4 a). In this embodiment, the light (fig. 7) is emitted along the sides of the octagon, and the light intensity perpendicular to the side of each side near the center is stronger than the light intensity on both sides of the side.

Example 2:

this example 2 differs from example 1 in that: in embodiment 2 of the present invention, the protection wall 102 is made of PCT material, the protection layer 103 is made of epoxy resin, the refractive index is 1.4, the protection layer 103 in this embodiment contains filler particles, the filler particles are SiO₂SiO added₂The weight ratio of (A) to (B) is 5%; in the present exemplary embodiment, four ellipses are seen from the side, wherein two parallel ellipses are approximately identical, and a b/a value is present, which is 0.53; the passivation layer 103 in this embodiment is formed by dispensing. The light emitting surface of this embodiment is octagonal, and the retaining wall surrounds the light emitting surface (f of fig. 8). In this embodiment, the arrangement of the LED devices is prismatic (see fig. 4 b).

Example 3:

this example 3 differs from example 1 in that: the embodiment 3 of the utility model provides an in, protection wall 102 comprises EMC material, and protective layer 103 comprises silicon rubber, and the refracting index is 1.57, and protective layer 103 in this embodiment contains the packing particle and is ZrO₂Added ZrO₂The weight ratio of (A) to (B) is 10%; in the present exemplary embodiment, four ellipses are seen from the side, two of the ellipses that are parallel are approximately identical, two b/a values are present, one of which is 0.4 and the other is 0.8; the protective layer 103 in this embodiment is manufactured by a spray molding method. The light emitting surface of the present embodiment exhibits a dodecagon shape (a of fig. 8). In this embodiment the LED devices are arranged prismatic, while the position of the devices is rotated 90 ° with respect to the first embodiment (see fig. 4 b).

In the above embodiments, the convex protection layer of the light emitting device is manufactured by molding, injection molding, dispensing molding, and injection molding.

In summary, compared with the prior art, the method has the following advantages:

1. the utility model provides a light emitting device and module refracts light through the shape of protective layer, realizes increasing the effect of the luminous angle of LED chip. The appearance of the overlooking direction of the light-emitting surface is a polygon or the shape of a fillet transition structure of two adjacent sides of the polygon, so that light can be refracted to emit light along the directions of the sides and the fillets of the polygon, and the light emitting of the side surface of the LED chip is increased.

2. The utility model discloses a bellied barricade is used for blockking the dispersion of protective layer, does benefit to the shaping of the play plain noodles of convex.

3. The utility model discloses a LED illuminator luminous intensity is Lambert's distribution, assembles under the little mixed light distance, can present more obvious pointolite effect. The spatial distribution of the edge-modified LED light-emitting devices is beneficial to improving the uniformity of the module.

It should be noted that other contents of the light emitting device and the module disclosed in the present invention can be referred to in the prior art, and are not described herein again.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.

Claims

1. A light-emitting device is characterized by comprising a substrate, an LED chip, a protective wall and a protective layer;

the LED chip is arranged on the substrate and positioned in the concave part;

2. The light-emitting device according to claim 1, wherein the substrate includes a positive electrode metal substrate layer and a negative electrode metal substrate layer, and the protection wall is filled around the LED chip and between the positive electrode metal substrate layer and the negative electrode metal substrate layer.

3. The light-emitting device according to claim 1, wherein the protective wall is vertically provided on the substrate, and an outermost portion of the protective layer has an elliptical shape.

4. The light-emitting device according to claim 3, wherein the elliptical shape satisfies X²/a²+Y²/b²1(a > b > 0), a being 1/2 of the width of the protective layer and b being the height of the protective layer.

5. The light-emitting device according to claim 4, wherein the light-emitting surface has at least one elliptical shape along a direction toward the outside of the protection wall, and the two or more elliptical shapes have different values of a and the same value of b.

6. The lighting device according to claim 4, wherein the ratio b/a is in the range of 0.4-0.8.

7. The lighting device as claimed in claim 1, wherein the protective wall is made of a thermosetting type material or a thermoplastic type material.

8. A light emitting device module comprising the light emitting device of any one of claims 1 to 7, a PCB, an IC driver, a diffusion sheet, a white light conversion layer, and a brightness enhancement sheet.