CN214540303U

CN214540303U - COB area light source, concatenation formula backlight unit and display device

Info

Publication number: CN214540303U
Application number: CN202022720191.2U
Authority: CN
Inventors: 周波; 何至年; 唐其勇; 朱弼章
Original assignee: Jiangxi Zhaochi Guangyuan Technology Co ltd
Current assignee: Jiangxi Zhaochi Guangyuan Technology Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-10-29
Anticipated expiration: 2030-11-20

Abstract

The utility model provides a COB area source, concatenation formula backlight unit and display device, wherein, the COB area source includes the COB base plate and lays in the printed circuit on COB substrate surface to and arrange in a plurality of LED light sources on the COB base plate, the LED light source with the printed circuit welding. The utility model provides a COB area source directly welds the LED light source on the COB base plate, reduces lamp strip circuit board structure, when saving lamp strip cost, can effectively subtract the heat dissipation route of short LED light source, improves heat dispersion to promote life, and can also reduce whole thickness, make the display device who adopts this COB area source can realize frivolous design.

Description

COB area light source, concatenation formula backlight unit and display device

Technical Field

The utility model relates to a LED shows technical field, especially relates to a COB area source, adopts the concatenation formula backlight unit and the display device of COB area source.

Background

At present, a direct type backlight module is generally used for a liquid crystal display to ensure better color gamut and more natural image effect. However, the conventional direct type backlight module generally comprises a heat dissipation carrier plate and a plurality of light bars arranged on the heat dissipation carrier plate, and the light bars include a light bar circuit board and a plurality of LED light sources arranged on the light bar circuit board, so that heat emitted by the LED light sources needs to pass through the light bar circuit board and then be transferred to the heat dissipation carrier plate, and the heat transfer path is long, thereby increasing thermal resistance, reducing heat dissipation performance of the backlight module, and easily causing problems of large light attenuation, short service life and the like of the backlight module.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a first purpose aims at providing a COB area light source that heat dispersion is good.

The utility model discloses a another purpose aims at providing an adopt concatenation formula backlight unit of above-mentioned COB area source.

Still another object of the utility model is to provide an adopt display device of above-mentioned COB area light source.

In order to achieve the above object, the present invention provides the following technical solutions:

as a first aspect, the utility model relates to a COB area light source, include the COB base plate and lay in the printed circuit on COB base plate surface to and arrange in a plurality of LED light sources on the COB base plate, the LED light source with the printed circuit welding.

Preferably, both the top and side surfaces of the LED light source can emit light.

Preferably, the LED light source includes a support, an LED chip disposed on the support, and a packaging adhesive covering the LED chip, wherein the LED chip protrudes from a top surface of the support.

Preferably, the LED light source further comprises a reflective layer disposed on the top surface of the support, and the LED chip is disposed on the reflective layer.

Preferably, a plurality of the LED light sources are arranged in a rectangular array on the COB substrate.

Furthermore, the printed circuit is provided with a welding spot for coating solder, and the LED light source is welded with the printed circuit through the welding spot.

Preferably, the welding spot is a groove structure formed on the COB substrate.

As the second aspect, the utility model discloses still relate to a concatenation formula backlight unit, including two at least above-mentioned COB area light sources, at least two the COB area light source splices each other along same horizontal plane.

As the third aspect, the utility model discloses still relate to a display device, include display panel and locate display panel's rear is used for doing display panel provides the back module in a poor light, back module includes above-mentioned COB area light source.

Preferably, the COB area light source is equipped with two at least COB area light source, at least two the COB area light source splices each other along same horizontal plane.

Compared with the prior art, the utility model discloses a scheme has following advantage:

1. the utility model provides a COB area source directly welds the LED light source on the COB base plate, reduces lamp strip circuit board structure, when saving lamp strip cost, can effectively subtract the heat dissipation route of short LED light source, improves heat dispersion to promote life, and can also reduce whole thickness, make the display device who adopts this COB area source can realize frivolous design.

2. The utility model provides an among the COB area source, the top surface and the side of LED light source all can give out light, need not additionally to set up lens alright realization on the LED light source the big light-emitting angle of LED light source can save the lens cost and simplify overall structure, reduces the product assembly degree of difficulty, promotes production efficiency.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic front view of a COB surface light source according to an embodiment of the present invention;

fig. 2 is a schematic side view of the COB surface light source shown in fig. 1;

fig. 3 is a schematic structural diagram of an LED light source in the COB surface light source shown in fig. 1;

fig. 4 is a schematic front structural view of the splicing type backlight module provided by the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

It will be understood by those within the art that, unless expressly stated otherwise, the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

Please refer to fig. 1 and 2, an embodiment of the present invention provides a COB area light source 1, the COB area light source includes COB substrate 11 and a plurality of LED light sources 12, the surface of COB substrate 11 is equipped with printed circuit (not shown, the same time down), a plurality of LED light sources 12 are arranged on COB substrate 11 according to predetermined position, every LED light source 12 all independently with printed circuit welds the back relatively COB substrate 11 is fixed.

Firstly, because LED light source 12 direct welding is in on COB base plate 11, compare the backlight unit who sets up the lamp strip structure, when can save lamp strip cost, still can reduce lamp strip circuit board structure to effectively reduce LED light source 12's heat dissipation route improves its heat dispersion, and then promotes life. Secondly, compare traditional lamp strip light source, can also hang down overall thickness, make the display device who adopts this COB area light source 1 can realize frivolous design.

Preferably, both the top surface and the side surface of the LED light source 12 can emit light, and a large light-emitting angle of the LED light source 12 can be realized without additionally arranging a lens on the LED light source 12, so that the cost of the lens is saved, the overall structure is simplified, the assembly difficulty of the product is reduced, and the production efficiency is improved.

As shown in fig. 3, the LED light source 12 includes a support 121, an LED chip 122 and a packaging adhesive 123, wherein the LED chip 122 protrudes from the top surface of the support 121 and is disposed on the support 121, and the packaging adhesive 123 is disposed on the LED chip. Compare conventional bowl form supporting structure, support 121 does not set up erect in the fender arm of LED chip 122 side effectively promotes LED chip 122's light-emitting angle, and makes COB area light source 1's whole light-emitting surface is more even unanimous, can eliminate bright dark light circle, and display effect is better.

Preferably, the LED light source 12 further includes a reflective layer (not shown, the same applies below) disposed on the top surface of the support 121, the LED chip 122 is disposed on the reflective layer, and the reflective layer is used for reflecting and converging the light emitted from the LED chip 122, so as to improve the illumination effect of the LED light source 12. Optionally, the reflecting layer is a silver coating layer, so that the cost is low and the reflecting layer has good light reflecting performance.

Further, the LED light source 12 further includes a conductive pillar 124 penetrating the support 121 and communicating with the upper end and the lower end of the support 121, one end of the conductive pillar 124 is connected to the LED chip 122, the other end is soldered to the printed circuit, and the LED chip 122 is electrically connected to the printed circuit through the conductive pillar 124.

As shown in fig. 1, preferably, a plurality of LED light sources 12 are arranged on the COB substrate 11 in a rectangular array to ensure uniformity, luminance and macroscopic effect of the whole light emission of the COB surface light source 1.

Furthermore, the printed circuit is provided with a solder joint for coating solder, and the LED light source 12 is soldered with the printed circuit through the solder joint.

Preferably, the solder joint is for seting up in groove structure on the COB base plate 11, COB base plate 11 passes through groove structure accepts the solder, can effectively avoid the solder flows and forms irregular structure to guarantee the solder with the contact surface parallel and level of LED light source 12 avoids the slope takes place in the installation of LED light source 12, ensures the installation intensity and the luminous effect of LED light source 12 to further reduce whole thickness.

As shown in fig. 4, as a second aspect, the embodiment of the present invention further relates to a splicing type backlight module 1000, including at least two above-mentioned COB area light sources 1, at least two COB area light sources 1 splice each other along same horizontal plane to form a large size area light source. Because COB area source 1's simple structure, thickness are thin and the light-emitting is even, through a plurality of the concatenation formula backlight unit 1000 that COB area source 1 concatenation formed also can reduce complete machine thickness when guaranteeing that the light-emitting is even to through disposing different quantity COB area source 1, make concatenation formula backlight unit 1000's size and shape all can be adjusted in a flexible way, and the suitability is strong.

As a third aspect, the present invention further relates to a display device (not shown, the same below), including the display panel and locating the rear of the display panel is used for providing the back module that is shaded for the display panel, the back module includes above-mentioned COB area light source 1.

The display device comprises but is not limited to a computer display, a liquid crystal television and the like, and the COB surface light source 1 is configured to enable the display device to be lower in cost, thinner in thickness, better in macroscopic effect and more uniform in brightness.

Preferably, COB area light source 1 is equipped with at least two, at least two COB area light source 1 forms concatenation formula backlight unit 1000 along same horizontal plane mutual concatenation, through the configuration concatenation formula backlight unit 1000 makes display device can adopt bigger size's display panel.

The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A COB area light source is characterized by comprising a COB substrate, a printed circuit and a plurality of LED light sources, wherein the printed circuit is arranged on the surface of the COB substrate, the LED light sources are arranged on the COB substrate, and the LED light sources are welded with the printed circuit; the LED light source comprises a support, an LED chip arranged on the support and packaging adhesive covered on the LED chip, and the LED chip protrudes out of the top surface of the support; the LED light source further comprises a reflecting layer arranged on the top surface of the support, and the LED chip is arranged on the reflecting layer.

2. The COB surface light source of claim 1, characterized in that the top surface and the side of LED light source can both emit light.

3. The COB surface light source of claim 1, characterized in that a plurality of the LED light sources are arranged in a rectangular array on the COB substrate.

4. The COB surface light source of claim 1, wherein the printed circuit is provided with a solder joint for coating solder, and the LED light source is soldered to the printed circuit through the solder joint.

5. The COB area light source of claim 4, wherein the solder joints are groove structures formed on the COB substrate.

6. A spliced backlight module, comprising at least two COB (chip on board) surface light sources as claimed in any one of claims 1 to 5, wherein the at least two COB surface light sources are spliced together along the same horizontal plane.

7. A display device, comprising a display panel and a back module disposed behind the display panel and used for providing backlight for the display panel, wherein the back module comprises the COB surface light source as claimed in any one of claims 1 to 5.

8. The display device according to claim 7, wherein the COB area light source is provided with at least two COB area light sources, and at least two COB area light sources are spliced with each other along the same horizontal plane.