CN201130286Y

CN201130286Y - Back light module unit

Info

Publication number: CN201130286Y
Application number: CNU2007200760861U
Authority: CN
Inventors: 罗来兵
Original assignee: SVA Group Co Ltd
Current assignee: SVA Group Co Ltd
Priority date: 2007-11-13
Filing date: 2007-11-13
Publication date: 2008-10-08
Anticipated expiration: 2017-11-13

Abstract

The utility model discloses an LCD backlight module, which comprises a light guide plate and a metal backboard; wherein, four concave angles are arranged at four corners of the light guide plate; four stud bolts are fixed on the metal backboard and respectively corresponds to four concave angles on four corners of the light guide plate; the light guide plate is limited on the metal backboard. The LCD backlight module has the advantages of simply and easily assembling and shortening work hour for assembling backlight module. L type lamp and II type lamp can be affectively applied in backlight module.

Description

Module backlight

Technical field

The utility model relates to a kind of LCD backlight module, particularly a kind of LCD backlight module that adopts the light guide plate that non-light incidence side do not contain protuberance.

Background technology

Liquid crystal in the panel of LCD itself is not had a characteristics of luminescence, therefore for reaching display effect, needs to give the LCD panel provide a planar light source device with the realization Presentation Function, as module backlight.The function of module backlight is to provide the area source that brightness is abundant and be evenly distributed to the LCD panel.

Back light model setting technology mainly is made up of light source, light guide plate, blooming piece etc.Wherein, this light source is arranged at the incidence surface side of this light guide plate.The effect of light guide plate is the transmission direction of direct light line, and light is evenly penetrated by the exiting surface of light guide plate.The location of the light guide plate of prior art in entire module is that the mode that the side by its non-incidence surface grows protuberance is located.Fig. 1 is the light guide plate synoptic diagram of prior art, as shown in the figure, at two sides of the non-incidence surface of light guide plate 1 ear 2 of protrusion is arranged, and mainly realize by ear 2 location of light guide plate 1.Light guide plate 2 cooperates the barricade or the glue frame (not shown) of backboard bending effectively to be positioned in the module backlight by ear 2.Light guide plate 1 structure with ear 2 makes and the out-of-flatness that becomes of the non-light incidence side of light guide plate also makes the offside reflection sheet need divide several sections attachings.The assembling difficulty of module backlight and the man-hour of assembling have been increased.

And this kind light guide plate can only be used straight type cold cathode fluorescent lamp in its light inlet side.And cold cathode fluorescent lamp is as one of module critical component backlight, and along with the development of its processing procedure, different profile characteristics are also more and more.Main kind just has straight tube, U type pipe, L type fluorescent tube, ∏ type fluorescent tube etc.In the existing structure of module backlight, because ear 2 is adopted in light guide plate 1 location, with backboard barricade location or glue frame profile location, be difficult to satisfy L type fluorescent tube, ∏ type fluorescent tube lamp is applied to the demand of this module backlight.

Summary of the invention

For addressing the above problem, the utility model provides a kind of module backlight, can reduce the number of assembling steps of module, realizes that the module assembling oversimplifies running, and can be so that L type fluorescent tube, and ∏ type fluorescent tube lamp well is applied in the module backlight.

For achieving the above object, module backlight of the present utility model, comprise light guide plate and metal backing, four angles of described light guide plate are provided with re-entrant angle, on described metal backing, be fixed with four double-screw bolts, described four double-screw bolts are the re-entrant angle on four angles of corresponding light guide plate respectively, and with described light guide plate limiting on metal backing.

The outer ring of described double-screw bolt is provided with rubber bushing.

Re-entrant angle on four angles of described light guide plate is the angle shape, perhaps is circular shape, and is perhaps polygon-shaped for what do not seal.

The contour structures of the light guide plate of module backlight of the present utility model is simple, and the reflector plate attaching of a non-light incidence side every limit of need once attaches and gets final product, and has shortened module and has assembled man-hour.In addition, because light guide plate no longer contains ear's structure of traditional structure at its non-light incidence side, make L type fluorescent tube, ∏ type fluorescent tube can effectivelyly be applied in this module backlight.

Module backlight of the present utility model is simply easy when assembling, has shortened module backlight and has assembled man-hour, and improved production efficiency.

Description of drawings

Fig. 1 is the light guide plate synoptic diagram of existing prior art;

Fig. 2 is a light guide plate synoptic diagram of the present utility model;

Fig. 3 is the backboard synoptic diagram of module backlight of the present utility model;

Fig. 4 is the local enlarged diagram of the backboard among Fig. 3;

Fig. 5 is the synoptic diagram of module backlight of the present utility model;

Fig. 6 is the synoptic diagram that L type fluorescent tube is applied to module backlight of the present utility model.

Embodiment

Below in conjunction with accompanying drawing utility model is further described:

Fig. 2 is a light guide plate synoptic diagram of the present utility model, and light guide plate has compared to existing technology been removed the ear of prior art, makes the profile of light guide plate be quadrangle form, and cut into re-entrant angle 22 on four angles of quadrilateral light guide plate 21.

Fig. 3 is the backboard synoptic diagram of module backlight of the present utility model, light guide plate 21 is applied in the module backlight, need consider its orientation problem, the utility model provides a kind of practical localization method, on metal backing 23, be fixed with four double-screw bolts 24, locate light guide plate 21 by double-screw bolt 24, that is, the re-entrant angle 22 on four angles of four corresponding respectively light guide plate 21 of double-screw bolt is realized the location.

Fig. 4 is the local enlarged diagram of the backboard among Fig. 3, and there is rubber bushing 25 outer ring of double-screw bolt 24, can play the effect of protection double-screw bolt 24, can also prevent that in addition the direct rigidity of light guide plate 21 and double-screw bolt 24 from contacting, and increases the effect of buffering.

Fig. 5 is the synoptic diagram of module backlight of the present utility model, and as shown in the figure, module backlight comprises light guide plate 21 and metal backing 23, and plastic cement frame and some relevant optical are as blooming piece and cold cathode fluorescent lamp group.Re-entrant angle 22 on four angles of light guide plate 21 is corresponding with four double-screw bolts 24 on the metal backing 23 respectively.Light guide plate 21 cooperate at the Qi Sijiao place step down cut into re-entrant angle 22, profile cooperates double-screw bolt 24 that light guide plate 21 is limited on the metal backing 23.

The profile of the re-entrant angle 22 that four jiaos of places of light guide plate cut is along with the specific design demand, re-entrant angle 22 can the angle shape, angle can be the unspecified angle between 0 °～180 °, or circular shape, or do not seal polygon-shaped or the like, mainly be effect in order to cooperate double-screw bolt that light guide plate is positioned.The profile specification of double-screw bolt 24 can be selected according to the actual requirements, as long as can play the effect to the light guide plate location.

Module backlight of the present utility model can be provided with fluorescent tube 26 at the side of non-incidence surface, as shown in Figure 6, Fig. 6 is the synoptic diagram that L type fluorescent tube is applied to module backlight of the present utility model, and the embodiment among the figure has adopted double L-shaped fluorescent tube.The method and the L type fluorescent tube that are adopted as ∏ type fluorescent tube are similar, repeat no more herein.

Claims

1. module backlight, comprise light guide plate and metal backing, it is characterized in that, four angles of described light guide plate are provided with re-entrant angle, on described metal backing, be fixed with four double-screw bolts, described four double-screw bolts are the re-entrant angle on four angles of corresponding light guide plate respectively, and with described light guide plate limiting on metal backing.

2. module backlight as claimed in claim 1 is characterized in that the outer ring of described double-screw bolt is provided with rubber bushing.

3. module backlight as claimed in claim 1 is characterized in that, the re-entrant angle on four angles of described light guide plate is the angle shape, perhaps is circular shape, and is perhaps polygon-shaped for what do not seal.