CN210835509U

CN210835509U - Backlight assembly and television

Info

Publication number: CN210835509U
Application number: CN201921186379.4U
Authority: CN
Inventors: 黄晓程; 王代青; 范兴国; 陈泰成; 孙海云; 刘金龙; 钮海峰
Original assignee: Shenzhen TCL Digital Technology Co Ltd
Current assignee: Shenzhen TCL Digital Technology Co Ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-06-23
Anticipated expiration: 2029-07-25
Also published as: WO2021013161A1

Abstract

The utility model provides a pair of backlight assembly and TV set, backlight assembly includes the PCB board, the front of PCB board is provided with the light source, the back of PCB board is provided with drive element, the light source with the electricity is connected between the drive element. The utility model discloses technical scheme's backlight unit is owing to adopted the PCB board as the light source board, and the drive element and the light source setting of light source need not to set up extra drive plate on same PCB board, can effectually save TV set backshell inner space, the utility model discloses a backlight unit is applied to the TV set, can be very big the thickness that reduces the TV set.

Description

Backlight assembly and television

Technical Field

The utility model relates to a liquid crystal display technology field especially relates to a backlight assembly and TV set.

Background

In the existing backlight assembly of a television, driving elements of an LED light source are usually separately disposed on a driving board, and then connected to a light source board through the driving board, and a heat sink is added on the driving board to dissipate heat. The driving board occupies a certain space inside the rear shell of the television, which is not beneficial to the thinning of the television, and how to further make the backlight component of the television thinner becomes a problem to be solved urgently by each television manufacturer.

Accordingly, the prior art is yet to be improved and developed.

SUMMERY OF THE UTILITY MODEL

In view of the not enough of above-mentioned prior art, the utility model aims at providing a backlight unit and TV set aims at solving current backlight unit drive plate and sets up alone, and it is big to occupy the backshell inner space, and the TV set can't be thin technical problem.

The technical scheme of the utility model as follows:

the backlight assembly comprises a PCB, wherein a light source is arranged on the front surface of the PCB, a driving element is arranged on the back surface of the PCB, and the light source is electrically connected with the driving element.

The backlight assembly further comprises a back plate, wherein the back surface of the PCB is coated with a heat-conducting adhesive layer, and the PCB is attached to the back plate through the heat-conducting adhesive layer.

The backlight assembly is characterized in that a driving element mounting area is arranged on the PCB, the driving element is arranged in the driving element mounting area, and a convex hull used for accommodating the driving element is arranged on the back plate.

In the backlight assembly, the driving element is provided with a heat conducting block, and the heat conducting block is in contact with the back plate.

The backlight assembly, wherein the back plate is a metal back plate.

The backlight assembly, wherein the convex hull position of the back plate is covered with a heat dissipation plate.

The backlight assembly, wherein, the convex hull position of backplate is provided with the stiffening rib.

The backlight assembly is characterized in that a through hole is formed in the PCB, bare copper is arranged on the edge of the through hole, a nut is welded on the through hole through soldering tin, and the back plate is fixedly connected with the nut on the PCB through a bolt.

The backlight assembly is characterized in that a wiring terminal electrically connected with the driving element is arranged in the driving element mounting area, and an opening facilitating wiring of the wiring terminal is arranged at the convex hull position of the back plate.

A television set comprising a backlight assembly as claimed in any one of the preceding claims.

Has the advantages that: the utility model provides a backlight assembly and TV set, wherein, backlight assembly includes the PCB board, the front of PCB board is provided with the light source, the back of PCB board is provided with drive element, the light source with the electricity is connected between the drive element. The utility model discloses technical scheme's backlight unit is owing to adopted the PCB board as the light source board, and the drive element and the light source setting of light source need not to set up extra drive plate on same PCB board, can effectually save TV set backshell inner space, the utility model discloses a backlight unit is applied to the TV set, can be very big the thickness that reduces the TV set.

Drawings

Fig. 1 is a schematic back structure view of a PCB of the present invention;

fig. 2 is a schematic front structural view of a PCB of the present invention;

fig. 3 is an exploded view of a preferred backlight module according to the present invention;

fig. 4 is a schematic view of the cross-sectional structure of the convex hull of the backlight assembly according to the present invention.

Detailed Description

The utility model provides a backlight assembly and TV set, for making the utility model discloses a purpose, technical scheme and effect are clearer, more clear and definite, following right the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and 2, the present invention provides a backlight assembly, which includes a PCB 10, a light source 20 is disposed on the front surface of the PCB, a driving element 30 is disposed on the back surface of the PCB, and the light source is electrically connected to the driving element.

The LED light source setting of current backlight unit is on a circuit board, and drive element sets up on another circuit board, connects through the connecting wire between two circuit boards, during the installation, owing to have two circuit boards, it is more to lead to occuping the inside space of TV set backshell, and the thickness of TV set also consequently increases, the utility model discloses technical scheme's main aim at solves traditional TV set drive plate and separately sets up with LED light source board, leads to the TV set complete machine to be thicker, and the drive plate separately sets up with LED light source board simultaneously, and the inside line of walking of TV set is comparatively complicated. The utility model discloses technical scheme makes integral structure (drive element and light source (preferred LED light source)) with drive plate component and light source board and sets up on a PCB board, and the positive and negative of PCB board all is provided with printed circuit, can link to each other through connecting terminal between the printed circuit on PCB board positive and negative two sides and switch on, reduces light source board and drive plate and occupies the inside space of TV set backshell, has greatly reduced the thickness of TV set complete machine.

Referring to fig. 3, in a preferred embodiment, the backlight assembly further includes a back plate 40, a back surface of the PCB is coated with a thermal conductive adhesive layer 50, and the PCB is attached to the back plate through the thermal conductive adhesive layer. On the TV set backplate of PCB board direct mount among this technical scheme, specifically adhere on the backplate through heat-conducting adhesive layer, heat-conducting adhesive layer among this technical scheme can be formed by the solidification of heat-conducting silica gel, heat-conducting silica gel has fine heat conduction, electric insulating property, heat-conducting silica gel before the solidification has better viscidity, can make PCB board adhesion on the backplate, and the PCB board can firmly the adhesion not take place to drop on the backplate after the heat-conducting silica gel solidification, the installation of the mode PCB board of installing through the adhesion is more convenient, heat-conducting silica gel layer can assist the PCB board again to dispel the heat simultaneously, greatly improve the life of PCB board.

Referring to fig. 3, in a preferred embodiment, the PCB board is provided with a driving element mounting area 60, the driving element 30 is disposed in the driving element mounting area, and the back plate is provided with a convex hull 70 for accommodating the driving element. The drive element among this technical scheme sets up the back at the PCB board, because drive element self has certain thickness, so correspond the position on the backplate and need set up corresponding convex closure and hold drive element, and for the ease of processing out corresponding convex closure on the backplate, set up drive element in the unified drive element installing zone of predetermineeing on the PCB board with drive element, preferred, this drive element installing zone is rectangular shape, and corresponding convex closure also sets up long strip.

Referring to fig. 4, in a preferred embodiment, a heat conducting block 80 is provided on the driving element and is in contact with the back plate. Wherein, the heat conduction piece can be graphite alkene piece or heat conduction silica gel piece, preferably heat conduction silica gel piece, and heat conduction silica gel piece has very good heat-conduction performance, and coefficient of heat conductivity is high, can strengthen driving element's heat-sinking capability remarkably, and wherein, heat conduction silica gel piece and backplate contact can also play fixed driving element and carry out the effect of buffering to driving element, prevent that driving element pine from taking off the damage.

In a preferred embodiment, the backing plate is a metal backing plate. Preferably, the metal back plate is an aluminum alloy back plate, the aluminum alloy back plate is light in weight, has certain strength and is easy to machine and form, and not only can assist in heat dissipation, but also can effectively reduce the overall weight of the television.

Referring to fig. 4, in a preferred embodiment, the convex hull position of the back plate is covered with a heat sink plate 90. Preferably, the heat dissipation plate is a metal plate or a graphene plate, and the shape and the size of the heat dissipation plate are matched with those of the convex hull, preferably in a strip shape.

Referring to fig. 4, in a preferred embodiment, the raised hull of the back plate is provided with a bead 100. The utility model discloses further evagination in both sides at convex closure top among the technical scheme forms the strengthening rib for improve the structural strength of backplate epirelief position, the middle indent of the auxiliary heating panel that corresponds sets up so that the shape adaptation of convex closure.

Referring to fig. 4, in a preferred embodiment, a via hole is formed in the PCB, bare copper 110 is arranged on the edge of the via hole, a nut 120 is welded to the via hole through soldering, and the backplane is fixedly connected to the nut on the PCB through a bolt. In order to further improve the joint strength between backplate and the PCB board, prevent that the backplate from droing, the utility model discloses still can fix through bolt and nut between technical scheme's backplate and the PCB board, preferred nut setting is in drive element's installing zone, and is located the position of convex closure non-strengthening rib, and the trompil that the screw passed and set up on the convex closure is connected with the nut on the PCB board to realize fixing between backplate and the PCB board.

Referring to fig. 1 and 3, in a preferred embodiment, the driving element mounting area is provided with a terminal 130 electrically connected to the driving element, and referring to fig. 3, the convex hull of the back plate is provided with an opening 140 for facilitating the wiring of the terminal. The wiring terminal is used for being connected with a core board in the rear shell, and the control chip on the core board controls the driving element to drive the LED light source.

In an optimized embodiment, the utility model discloses PCB board among the backlight unit still can be formed by a plurality of sub-PCB board amalgamations, driving element sets up in one side of sub-PCB board, a plurality of sub-PCB boards splice each other through the one side that is provided with driving element, driving element after the concatenation forms rectangular shape and distributes, so that process out the convex closure that is used for holding the driving element rectangular shape on the backplate, PCB board among this technical scheme is formed by a plurality of sub-PCB board amalgamations, when a sub-PCB board wherein damages, need not to change the monoblock PCB board, only need replace the sub-PCB board of corresponding damage can, can be very big save cost of maintenance.

In addition, the invention also provides a television, which comprises the backlight assembly.

To sum up, the utility model provides a pair of subassembly and TV set are shaded, the subassembly is shaded includes the PCB board, the front of PCB board is provided with the light source, the back of PCB board is provided with drive element, the light source with the electricity is connected between the drive element. The utility model discloses technical scheme's backlight unit is owing to adopted the PCB board as the light source board, and the drive element and the light source setting of light source need not to set up extra drive plate on same PCB board, can effectually save TV set backshell inner space, the utility model discloses a backlight unit is applied to the TV set, can be very big the thickness that reduces the TV set.

It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. The backlight assembly is characterized by comprising a PCB and a back plate, wherein a light source is arranged on the front surface of the PCB, a driving element is arranged on the back surface of the PCB, and the light source is electrically connected with the driving element; the driving element is provided with a heat conduction block, and the heat conduction block is in contact with the back plate.

2. The backlight assembly of claim 1, wherein the back surface of the PCB is coated with a thermal conductive adhesive layer, and the PCB is attached to the back plate through the thermal conductive adhesive layer.

3. The backlight assembly of claim 2, wherein the PCB board is provided with a driving element mounting region, the driving element is disposed in the driving element mounting region, and the back plate is provided with a convex hull for accommodating the driving element.

4. The backlight assembly of claim 1, wherein the backplane is a metal backplane.

5. The backlight assembly of claim 1 or 4, wherein the convex hull position of the back plate is covered with a heat dissipation plate.

6. The backlight assembly of claim 3, wherein the convex hull of the back plate is provided with a stiffener.

7. The backlight assembly of claim 2, wherein the PCB is provided with a via hole, the edge of the via hole is provided with bare copper, the via hole is welded with a nut through soldering tin, and the back plate is fixedly connected with the nut on the PCB through a bolt.

8. The backlight assembly of claim 2, wherein the driving element mounting region is provided with a connecting terminal electrically connected to the driving element, and the convex hull of the back plate is provided with an opening at a position of the convex hull for facilitating the connection of the connecting terminal.

9. A television set comprising the backlight assembly of any one of claims 1 to 8.