CN209876608U

CN209876608U - LED light source assembly and backlight assembly

Info

Publication number: CN209876608U
Application number: CN201920456961.1U
Authority: CN
Inventors: 游志; 裴小明
Original assignee: SHENZHEN RUIFENG OPTOELECTRONICS CO Ltd
Current assignee: SHENZHEN RUIFENG OPTOELECTRONICS CO Ltd; Shenzhen Refond Optoelectronics Co Ltd
Priority date: 2019-04-01
Filing date: 2019-04-01
Publication date: 2019-12-31
Anticipated expiration: 2029-04-01

Abstract

The utility model relates to a LED technical field discloses a LED light source subassembly and subassembly in a poor light. The LED light source assembly comprises a substrate and LED lamp beads, the LED lamp beads are obliquely fixed on the substrate, and the substrate can reflect light rays emitted by the LED lamp beads so as to increase the light emitting range; the LED lamp bead comprises an LED chip, a support bowl and pins, the LED chip is fixed on the support bowl, the pins comprise a first part and a second part, the first part is fixedly connected with the support bowl, the second part is attached to the substrate, the second part is fixed on the substrate, and the second part is bent relative to the first part; the backlight assembly comprises the LED light source assembly. The utility model provides a LED light source subassembly and backlight unit can enlarge the light-emitting scope, will reach the interval that same illumination scope can increase between the adjacent LED lamp pearl, reduce the LED lamp pearl quantity that needs the installation promptly, and need not to use secondary optical lens to enlarge the light-emitting angle, consequently, compact structure has reduced the thickness of whole product, has still saved the cost.

Description

LED light source assembly and backlight assembly

Technical Field

The utility model relates to a LED technical field especially relates to a LED light source subassembly and backlight unit.

Background

LEDs are a class of light emitting devices that can directly convert electrical energy into visible and radiant energy, and have the advantages of high efficiency, low power consumption, long lifetime, high light emission quality, pure light color, high reliability, low driving voltage, and robust construction. Pins of an existing LED product are generally parallel or vertical to a substrate, light rays are emitted from an LED chip and then are directly emitted, the area of a light spot formed by the light rays is small, the light emitting range is small, and the illumination intensity is uneven.

In order to increase the light emitting range, the LED products such as the panel light and the backlight source of the display are generally closely arranged by adopting low-power LED light sources emitting light from the front side, and the light scattering of the diffusion plate shows the surface light source effect of uniform light emission; or the high-power LED light source emitting light from the front side is combined with the secondary optical lens, so that the light emitting angle is enlarged, the light emitting range is enlarged, the using number of lamp beads on the whole surface light source is reduced, and the light scattering of the diffusion plate shows the surface light source effect of uniform light emission. However, when the LED light sources with low power and compact arrangement are used, because there is no secondary optical lens design, the overall uniform light emission can be realized only by designing the spacing between the LED light sources to be small, so the number of the required LED light sources is large, and the cost is high; when a high-power LED light source is combined with the secondary lens, the thickness of the whole LED product is larger due to the addition of the secondary optical lens, and the light and thin design of the product is not facilitated. Therefore, there is an urgent need for an LED light source module with a simple structure and capable of increasing the illumination range.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a LED light source subassembly and backlight assembly, this LED light source subassembly and backlight assembly can enlarge the light-emitting scope, will reach the interval that same illumination scope can increase between the adjacent LED lamp pearl, reduce the LED lamp pearl quantity that needs the installation promptly, and need not to use secondary optical lens to enlarge the light-emitting angle, consequently, compact structure has reduced the thickness of whole product, has still saved the cost.

The utility model provides a technical scheme that its technical problem adopted is:

the LED lamp bead is obliquely fixed on the substrate, and the substrate can reflect light rays emitted by the LED lamp bead to enlarge the light emitting range; the LED lamp bead comprises an LED chip, a support bowl cup and a pin, wherein the LED chip is fixed on the support bowl cup, the pin comprises a first part and a second part, the first part is fixedly connected with the support bowl cup, the second part is attached to the substrate, the second part is fixed on the substrate, and the second part is bent relative to the first part.

As a further improvement of the technical scheme, the LED lamp bead further comprises a packaging layer, wherein the packaging layer is positioned in the support bowl cup, and the packaging layer wraps the LED chip.

As a further improvement of the above technical solution, the LED chip is electrically connected to the pin through a wire.

As a further improvement of the technical scheme, the LED lamp bead comprises the LED chip which can emit light with at least two colors.

As a further improvement of the above technical solution, the substrate has a reflectivity of greater than 20% to light.

As a further improvement of the above technical solution, the substrate is made of metal.

As a further improvement of the technical scheme, the substrate is a BT plate or an FR-4 epoxy glass cloth laminated plate.

A backlight assembly is also provided, which comprises the LED light source assembly.

The utility model has the advantages that: the utility model provides a LED light source subassembly and backlight unit can enlarge the light-emitting scope, will reach the interval that same illumination scope can increase between the adjacent LED lamp pearl, reduce the LED lamp pearl quantity that needs the installation promptly, and need not to use secondary optical lens to enlarge the light-emitting angle, consequently, compact structure has reduced the thickness of whole product, has still saved the cost.

Drawings

The invention will be further described with reference to the following figures and examples:

FIG. 1 is a schematic diagram of a first prior art LED light source module;

FIG. 2 is a schematic diagram of a second prior art LED light source module;

fig. 3 is a schematic structural diagram of an LED light source assembly according to an embodiment of the present invention.

Detailed Description

The conception, specific structure and technical effects of the present invention will be described clearly and completely with reference to the accompanying drawings and embodiments, so as to fully understand the objects, aspects and effects of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the description of the upper, lower, left, right, front, rear, etc. used in the present invention is only relative to the mutual position relationship of the components of the present invention in the drawings.

Furthermore, 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. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any combination of one or more of the associated listed items.

Referring to fig. 1, a schematic diagram of a first prior art LED light source assembly is shown. The LED light source assembly comprises an LED lamp bead 11 and a substrate 12. The LED lamp bead 11 includes a support cup 111, a pin 112, a chip 113 and a package layer 114. The lead 112 is composed of three parts, wherein a first part 1121 of the lead is positioned in the holder cup 111, a third part 1123 of the lead is parallel to the first part 1121, the third part 1123 is fixed on the substrate 12, and the second part 1122 connects the first part 1121 with the third part 1123. In the LED light source assembly, the receiving surface 13 of the light is parallel to the substrate 12, the light emitted from the LED chip 113 directly exits to the receiving surface 13, the light spots are uneven, and the light exiting range is limited.

Referring to fig. 2, a schematic diagram of a second prior art LED light source assembly is shown. The LED light source component comprises an LED lamp bead 21 and a substrate 22. The LED lamp bead 21 includes a support bowl 211, a pin 212, a chip 213 and a package layer 214. Pin 212 is comprised of two parts, a first part 2121 of the pin being located within support cup 211, a second part 2122 of the pin being perpendicular to first part 2121, and second part 2122 being fixed to base 22. In the LED light source module, the receiving surface 23 of the light is perpendicular to the substrate 22, the light emitted from the LED chip 213 directly exits to the receiving surface 23, the light spot is not uniform, and the light exiting range is limited.

From the above, the receiving surface of the LED light source assembly in the prior art is parallel or perpendicular to the substrate, and all the LED light sources emit light directly without intermediate processes such as reflection, the range of the emitted light is usually small, the light is concentrated, and the illumination intensity is uneven.

Referring to fig. 3, a schematic structural diagram of an LED light source assembly in an embodiment of the present invention is shown. The LED light source assembly comprises an LED lamp bead 31 and a substrate 32. A plurality of LED beads 31 are tilted and fixed on the substrate 32. The included angle between the light-emitting surface 33 of each lamp bead 31 and the substrate 32 is alpha, and alpha is more than 0 degree and less than 90 degrees.

The LED lamp bead 31 includes a support cup 311, a pin 312, an LED chip 313 and a package layer 314. The LED chip 313 is fixed on the support cup 311 and electrically connected to the pins 312 through wires, and the encapsulation layer 314 is located in the support cup 311 and wraps the LED chip 313 therein. The pin 312 includes a first portion 3121 and a second portion 3122, wherein the first portion 3121 is fixedly connected to the support cup 311, and the second portion 3122 extends out of the support cup 311. The first portion 3121 and the second portion 3122 are bent to form an acute angle therebetween, and the bottom surface of the second portion 3122 is tightly attached to the surface of the substrate 32 and is welded on the substrate 32.

The encapsulation adhesive encapsulates the LED chip 313, and the encapsulation layer 314 is formed by a molding process. The LED chip 313 may be a single color chip or an RGB chip, and may be adjusted according to different requirements. When the LED chip 313 is packaged, a thermosetting material, such as silica gel or epoxy resin, is selected as a packaging adhesive, and fluorescent powder or diffusion powder is mixed into the packaging adhesive according to the application requirement of the LED light source assembly. The process parameters of the packaging process and the like can be obtained by referring to the prior art.

The substrate 32 may be a metal plate, a fiber plate, or the like, for example, an aluminum substrate, a BT plate, or an FR-4 epoxy glass cloth laminate. The substrate 32 is required to reflect light, and preferably, the substrate 32 has a light reflectivity of more than 20%.

Since the first portions 3121 and the second portions 3122 of the leads 312 are bent at an acute angle, after passing through the encapsulant 314, a part of the light emitted from the LED chip 313 directly exits to the receiving surface 34, and a part of the light reaches the surface of the substrate 32. Since the substrate 32 is made of a material that reflects light, the light that reaches the surface of the substrate 32 is reflected and reaches the receiving surface 34. Therefore, the LED light source assembly can emit light directly or after being reflected by the substrate 32.

Compared with the LED light source assembly of the two prior art, through increasing the reflection light-emitting through base plate 32, can increase the light-emitting scope, make light disperse more to the illumination intensity that will receive the face central point reduces, makes central point and peripheral illumination intensity comparatively close, and whole illumination intensity is more even. When the bending angle between the first portion 3121 and the second portion 3122 of the lead 312 is adjusted, the fixture α between the light emitting surface 33 of the LED chip 313 and the substrate 32 is changed accordingly, so as to adjust the light emitting range. Therefore, the light emitting range and the light emitting angle of the LED light source assembly can be designed according to the illumination requirements of different application scenarios, and the required bending angle between the first portion 3121 and the second portion 3122 of the pin 312 is determined by reverse extrapolation.

Because the utility model provides a LED light source subassembly can enlarge the light-emitting scope, consequently, compares with the LED product among the prior art, will reach same illumination scope, can increase the interval between the adjacent LED lamp pearl, reduces the quantity of the LED lamp pearl that needs the installation promptly, and need not to use secondary optical lens to enlarge the light-emitting angle, consequently, has reduced the thickness of whole product, has still saved the cost. The LED light source component can be applied to various backlight components, panel lamps and other products to enlarge the light emitting range and homogenize the light emitting intensity.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An LED light source assembly is characterized by comprising a substrate and LED lamp beads, wherein the LED lamp beads are obliquely fixed on the substrate, and the substrate can reflect light rays emitted by the LED lamp beads to enlarge the light emitting range; the LED lamp bead comprises an LED chip, a support bowl cup and a pin, wherein the LED chip is fixed on the support bowl cup, the pin comprises a first part and a second part, the first part is fixedly connected with the support bowl cup, the second part is attached to the substrate, the second part is fixed on the substrate, and the second part is bent relative to the first part.

2. The LED light source assembly of claim 1, wherein an included angle between the light-emitting surface of the LED bead and the substrate is α, and α is greater than 0 ° and less than 90 °.

3. The LED light source assembly of claim 1, wherein the LED bead further comprises an encapsulant layer, the encapsulant layer being disposed within the support bowl and encapsulating the LED chip.

4. The LED light source assembly of claim 1, wherein the LED chip is electrically connected to the leads by wires.

5. The LED light source module of claim 1, wherein the LED bead comprises at least two LED chips emitting light of different colors.

6. The LED light source assembly of claim 1, wherein the substrate has a reflectivity of greater than 20% for light.

7. The LED light source module as recited in claim 1, wherein the substrate is made of metal.

8. The LED light source assembly of claim 1, wherein the substrate is a BT board or an FR-4 epoxy glass cloth laminate.

9. A backlight assembly characterized by comprising the LED light source assembly of any one of claims 1 to 8.