CN202580970U

CN202580970U - Backlight module and display device

Info

Publication number: CN202580970U
Application number: CN2012202051396U
Authority: CN
Inventors: 郭东明; 柴岩峰
Original assignee: Shenzhen TCL New Technology Co Ltd
Current assignee: Shenzhen TCL New Technology Co Ltd
Priority date: 2012-05-09
Filing date: 2012-05-09
Publication date: 2012-12-05
Anticipated expiration: 2022-05-09

Abstract

The utility model discloses a backlight module and a display device, wherein the backlight module comprises a back plate, lamp strips are mounted on the back plate, each lamp strip is a rectangular sawtooth structure formed by protruding portions and hollowed portions, and the protruding portions and the hollowed portions are arranged at regular intervals. A light-emitting diode (LED) of each lamp strip is arranged on the protruding portions. The backlight module and the display device use a split joint structure mode of the lamp strips, the lamp strips are arranged into the rectangular sawtooth structure, and an effective heat dissipation of a printed circuit board (PCB) beside a lamp strip LED is increased. In addition, tin foil paper is adopted to wrap up and bond the bottom and two side edges of each lamp strip, so that the effective heat dissipation of LED is further enlarged. Moreover, the tin foil paper wrapped at the two side edges of each lamp strip is further tightly adhesive with a reflector piece arranged on the surface of each lamp strip, so that light emitting from the LED is leaked to the back plate through a lamp hole on the reflector piece, backlight brightness loss is reduced, and heat of the lamp strips can be conducted to the back plate and diffuses, a plastic back plate is adopted to replace a metal back plate, cost is reduced, and production efficiency can be improved.

Description

Module backlight and display device

Technical field

The utility model relates to technical field of electronic products, relates in particular to a kind of module backlight and has the display device of this module backlight.

Background technology

In the backlight liquid crystal display module, compare side entrance back, direct-type backlight is not owing to need LGP; Its single LEDs power is relatively large, uses less LED number just can obtain higher backlight illumination, therefore; Relative side entrance back, direct-type backlight has more cost advantage.

As shown in Figure 1, Fig. 1 is a down straight aphototropism mode set sketch map of the prior art.Direct-type backlight is because single LEDs power is bigger, and its radiator structure is normally at pencil-shape lamp bar 50 bottom coating silicone greases, the operation relative complex of its even coating silicone grease, and then pencil-shape lamp bar 50 is fixed on the metal backing 60 through screw.Because silicone grease has certain fluidity, in the process that pencil-shape lamp bar 50 is installed, silicone grease drops on the diaphragm backlight easily, and diaphragm backlight is polluted, and causes material deterioration inside; On the other hand; Because metal backing 60 areas are bigger, after punching press or machined, the surface planarity of metal backing 60 is good inadequately; Cause between pencil-shape lamp bar 50 and the metal backing 60 the applying degree not enough easily; Cause partial L ED heat radiation bad, after the long period, will produce harmful effect bright dark uniformity backlight.

The utility model content

The main purpose of the utility model is to provide a kind of module group backlight module backlight and display device, when the LED that is intended to guarantee module backlight has good heat radiating, reduces heat radiation cost backlight, enhances productivity.

In order to achieve the above object, the utility model proposes a kind of module backlight, comprises backboard; The lamp bar is installed on the said backboard, and said lamp bar is to be spaced the half round saw toothing that forms by lug boss and depressed part; The LED of said lamp bar is arranged on said lug boss.

Preferably, offer square grooving on the said backboard, said lamp bar is installed in the said square grooving.

Preferably, this module backlight also comprises masking foil, and said masking foil is arranged between said backboard and the said lamp bar, with the bottom and the dual-side parcel of said lamp bar.

Preferably, said masking foil and said lamp bar are bonding.

Preferably, this module backlight also comprises reflector plate, and said reflector plate is arranged on the upper surface of said lamp bar, said reflector plate be provided with said lamp bar on the corresponding lamp hole of LED.

Preferably, the masking foil that wraps up said lamp bar dual-side extends upward with said reflector plate bonding.

The utility model also proposes a kind of display device, comprises aforesaid module backlight.

Module a kind of backlight and display device that the utility model proposes; Utilize the splicing construction of lamp bar; The lamp bar is set to lug boss and depressed part is spaced the half round saw toothing that forms, and LED is arranged on lug boss, has increased the PCB efficiently radiates heat area on lamp bar LED next door; Adopt masking foil that the bottom and the dual-side parcel of lamp bar is bonding in addition, further strengthened the efficiently radiates heat area of LED; In addition; The masking foil of parcel lamp bar dual-side also clings with the reflector plate that is arranged on lamp bar surface; The light of having avoided LED to send leaks into backboard from the lamp hole on the reflector plate, reduce the backlight illumination loss, and masking foil can also conduct the heat of lamp bar to backboard; Backboard distributes heat through the mode of radiation and convection current, can effectively reduce the temperature of LED; Further, the radiator structure of the utility model substitutes the radiator structure that traditional lamp bar is thickeied big metal backing, significantly reduces cost backlight, simplifies the installation procedure of backing structure simultaneously, enhances productivity.

Description of drawings

Fig. 1 is a down straight aphototropism mode set sketch map of the prior art;

Fig. 2 is the structural representation of the utility model module preferred embodiment backlight;

Fig. 3 is an A place enlarged diagram among Fig. 2;

Fig. 4 is the structural representation of the utility model module preferred embodiment backlight dorsulum;

Fig. 5 is the structural representation of lamp bar in the utility model module preferred embodiment backlight;

Fig. 6 is the splicing construction sketch map of lamp bar shown in Figure 5;

Fig. 7 is the structural representation of reflector plate in the utility model module preferred embodiment backlight.

Clearer for the technical scheme that makes the utility model, clear, will combine accompanying drawing to do further to detail below.

The specific embodiment

Like Fig. 2 and shown in Figure 3, Fig. 2 is the structural representation of the utility model module preferred embodiment backlight; Fig. 3 is an A place enlarged diagram among Fig. 2.

The module a kind of backlight that present embodiment proposes is down straight aphototropism mode set, and it comprises back shroud 1, backboard 4, reflector plate 3, masking foil 5, wherein:

Backboard 4 adopts plastic cement material, and a side of backboard 4 is fixed on the back shroud 1, and lamp bar 2 is installed in the another side of backboard 4, and wherein, lamp bar 2 is for being equipped with the pcb board of LED23.

Masking foil 5 is arranged between lamp bar 2 and the backboard 4, and lamp bar 2 and backboard 4 are separated, and is beneficial to the heat radiation of lamp bar 2.

Reflector plate 3 is arranged on the upper surface of lamp bar 2, and promptly lamp bar 2 is away from the one side of backboard 4.

Particularly, in conjunction with shown in Figure 4, Fig. 4 is the structural representation of present embodiment dorsulum, and the surface of a side of lamp bar 2 being installed at backboard 4 offers square grooving 41, is used to install lamp bar 2.

As shown in Figure 5, Fig. 5 is the structural representation of lamp bar 2 in the present embodiment, and lamp bar 2 is to be spaced the half round saw toothing that forms by lug boss 21 and depressed part 22 in the present embodiment, that is to say, lug boss 21 is square with depressed part 22; The LED23 of lamp bar 2 is arranged in the above-mentioned square lug boss 21, and near lamp bar 2 one side in the bottom of said depressed part 22.

Can find out that by said structure the PCB near LED23 in the lamp bar 2 is large tracts of land square structure (being lug boss 21), and be small size square structure (being the square structure that lamp bar 2 is positioned at depressed part 22 bottoms) away from the PCB of LED23.This kind structural design mainly is to consider that the PCB in the lamp bar 2 is multilayer copper foil and FR4 integrated structure, and its heat conductivility is relatively poor relatively; And the PCB near LED23 is set to the large tracts of land square structure in the lamp bar 2, is set to the small size square structure away from the PCB of LED23, mainly is because higher near near the PCB temperature the LED23; Big with circumstance of temperature difference, radiating efficiency is higher relatively, and relatively low away from the pcb board radiating efficiency of LED23; Adopt the lamp bar 2 of above-mentioned half round saw toothing, can improve the radiating efficiency of PCB, compare prior art; Present embodiment has removed the metal backing structure simultaneously; Saved operation, improved production efficiency, reduced the proportion of goods damageds that polluted by silicone grease backlight at lamp bar 2 bottom coating silicone greases.

As shown in Figure 6; Processing for ease can Numerical control cutting go out cut section as shown in Figure 6 24 on the square PCB of a block length, thereby makes rectangular PCB be divided into two lamp bars 2 of splicing each other; Can find out the depressed part 22 and the lug boss 21 mutual interlocks of two lamp bars 2 by Fig. 6.Compare the lamp bar 2 that rectangle PCB processes in the prior art; Because present embodiment adopts square jagged lamp bar 2; Increased the PCB efficiently radiates heat area on lamp bar 2LED23 next door, in the radiating efficiency that improves PCB, the material cost that can also save PCB.

In the present embodiment, masking foil 5 is through wrapping up the bottom and the limit, the left and right sides of lamp bar 2 with lamp bar 2 bonding way, and the masking foil 5 that wraps up limit, lamp bar 2 left and right sides simultaneously also extends upward to bonding with the reflector plate 3 of lamp bar 2 upper surfaces.

In conjunction with shown in Figure 7, Fig. 7 is the structural representation of reflector plate 3 in the present embodiment.Reflector plate 3 is provided with lamp hole 31, and LED23 is exposed outside.

Because masking foil 5 has certain thermal conductivity, employing masking foil 5 wraps up lamp bars 2, has been equivalent to increase the efficiently radiates heat area of the PCB of lamp bar 2, and masking foil 5 relative heat-conducting silicone grease low prices, thereby has reduced the cost of the PCB of lamp bar 2.

On the other hand; Because the masking foil 5 of lamp bar 2 both sides is bonding with the reflector plate 3 above the lamp bar 2; Avoided LED light to leak into backboard 4, reduce the backlight illumination loss, and lamp bar 2 has conducted heat to backboard 4 through masking foil 5 from the lamp hole 31 on the reflector plate 3; Backboard 4 dissipates heat through radiation and convection current, thereby has improved the radiating effect of backing structure.

In addition, the utility model also proposes a kind of display device, and this display device comprises module backlight, and this module backlight can adopt the module backlight in the foregoing description, and its internal structure characteristics please with reference to the foregoing description, repeat no more at this.

Compare prior art, the display device that the utility model embodiment provides utilizes the splicing construction mode of lamp bar 2, has increased the PCB efficiently radiates heat area on lamp bar 2LED23 next door; And through adopting masking foil 5 bonding with the PCB of lamp bar 2; Further strengthen the efficiently radiates heat area of LED, masking foil 5 clings the reflector plate 3 above the lamp bar 2 on the one hand, has kept away LED light and has leaked into plastic back plate 4 from the lamp hole on the reflector plate 3; Reduce the backlight illumination loss; Heat with lamp bar 2 conducts to plastic back plate 4 on the other hand, and plastic back plate 4 distributes heat through the mode of radiation and convection current, effectively reduces the temperature of LED etc.; And the radiator structure of the utility model substitutes the radiator structure of the big metal backing 4 of traditional lamp bar 2 thickenings, significantly reduces cost backlight, simplifies installation procedure backlight simultaneously, enhances productivity.

The above is merely the preferred embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical field, all in like manner be included in the scope of patent protection of the utility model.

Claims

1. a module backlight comprises backboard; The lamp bar is installed on the said backboard, it is characterized in that, said lamp bar is to be spaced the half round saw toothing that forms by lug boss and depressed part; The LED of said lamp bar is arranged on said lug boss.

2. module backlight according to claim 1 is characterized in that, offers square grooving on the said backboard, and said lamp bar is installed in the said square grooving.

3. module backlight according to claim 2 is characterized in that, also comprises masking foil, and said masking foil is arranged between said backboard and the said lamp bar, with the bottom and the dual-side parcel of said lamp bar.

4. module backlight according to claim 3 is characterized in that, said masking foil and said lamp bar are bonding.

5. according to claim 3 or 4 described modules backlight, it is characterized in that also comprise reflector plate, said reflector plate is arranged on the upper surface of said lamp bar, said reflector plate be provided with said lamp bar on the corresponding lamp hole of LED.

6. module backlight according to claim 5 is characterized in that, the masking foil that wraps up said lamp bar dual-side extends upward with said reflector plate bonding.

7. a display device is characterized in that, comprises each described module backlight among the claim 1-6.