CN208954526U - A kind of backlight module - Google Patents

Abstract

The utility model proposes a kind of backlight modules, and a circle foam is arranged including backboard, the light guide plate being placed in backboard, the optical diaphragm group being placed in above light guide plate and the metal plate center being placed in above backboard, in the gap between the metal plate center and optical diaphragm group.The utility model can be effectively prevented the microparticles object such as dust and enter between backlight unit and optical diaphragm, while can effectively mitigate backlight module side view angle light leakage phenomena by the way that a circle foam is arranged in the gap between metal plate center and optical diaphragm.

Description

A kind of backlight module

Technical field

The utility model relates to art of display device manufacture, concretely relate to a kind of backlight module.

Background technique

Vehicle-carrying display screen is a kind of display for using on automobile, in working environment the microparticles object such as dust compared with More, the reasons dust microparticle such as shaking because of Uneven road, vehicle vibration in traveling has probability to enter backlight unit and each Between diaphragm, backlight module display portion functional deficiency is caused.Fig. 1 is existing vehicle-mounted back light module unit structure schematic diagram, backlight Mould group includes backboard 1, the lamp bar 2 on the side wall for being placed in backboard 1, the light guide plate 3 being placed in backboard 1, is placed in 3 top of light guide plate Optical diaphragm group 4 and the metal plate center 5 for being placed in the top of backboard 1, there are gap between metal plate center 5 and optical diaphragm group 4, Tearing off the microparticles such as dust foreign matter during the protective film or panel sectional of optical diaphragm group 4 has probability to enter back by gap Light module internal.In addition, optical diaphragm group is fixed on the side that light guide plate has step using double-sided adhesive, optical diaphragm group and lead Tabula rasa only has side to be connected, and optical diaphragm group is easy to cause to tilt because of stress vibration apart from the farther away side of double-sided adhesive, dust etc. Microparticle has probability to enter between optical diaphragm, destroys surface of optical diaphragm particle etc..In addition, between metal plate center and optical diaphragm Gap also easily cause backlight module side leakage optical phenomenon.

Utility model content

The utility model proposes a kind of backlight modules, and can solving existing backlight module, there are the microparticles such as dust foreign matter to pass through The problem of gap entry of backlight mould group between metal plate center and optical diaphragm group.

The utility model provides a kind of backlight module, including backboard, the light guide plate being placed in backboard, is placed in above light guide plate Optical diaphragm group and the metal plate center that is placed in above backboard, set in the gap between the metal plate center and optical diaphragm group Set a circle foam.

Further, the backboard includes bottom plate and side wall, and the metal plate center is placed on the top of side wall.

Further, the foam is in a strip shape, and a foam is respectively provided with below the four edges of the metal plate center.

Further, four foam group quadrangularlies.

Further, the size with a thickness of the gap between metal plate center and optical diaphragm of the foam.

Further, several convex blocks are arranged in the light-guide edge, and the convex block is pressed on described in the x direction and the y direction In optical diaphragm group, the foam is pressed in optical diaphragm group in z-direction.

The utility model can effectively be prevented by the way that a circle foam is arranged in the gap between metal plate center and optical diaphragm Only the microparticles object such as dust enters between backlight unit and optical diaphragm, while can effectively mitigate backlight module side Visual angle light leakage phenomena.

Detailed description of the invention

Fig. 1 is existing vehicle-mounted back light module unit structure schematic diagram；

Fig. 2 is the utility model back light module unit structure cross-sectional view；

Fig. 3 is the utility model back light module unit structure perspective view.

Specific embodiment

In the following with reference to the drawings and specific embodiments, the utility model is furtherd elucidate, it should be understood that these embodiments are only used for Illustrate the utility model rather than limitation the scope of the utility model, after having read the utility model, art technology Personnel fall within the application range as defined in the appended claims to the modification of the various equivalent forms of the utility model.

The utility model proposes a kind of backlight modules, as shown in Fig. 2, including backboard 10, backboard 10 includes bottom plate 11 and side The side wall 12 of wall 12, backboard 10 is equipped with lamp bar 20, and metal plate center 30 is placed on the top of the side wall 12 of backboard 10, backboard 10 It is equipped with light guide plate 40 in the accommodating space that bottom plate 11 and side wall 12 surround, is equipped with optical diaphragm group 50, metal plate above light guide plate 40 One circle foam 60 of setting, foam 60 are close to the surrounding of optical diaphragm group 30 in gap between center 30 and optical diaphragm group 50, Optical diaphragm group 30 is facilitated the assembly of optical diaphragm group 30 and done over again without in addition being fixed using double-sided adhesive and light guide plate 40.

As shown in figure 3, foam 60 does not use " mouth " character form structure, and uses strip structure, metal plate center to save cost A foam 60 is respectively pasted in the lower section of 30 opening four edges, four foams, 60 groups of quadrangularlies, foam 60 with a thickness of in metal plate The size in the gap between frame 30 and optical diaphragm group 50, the color of foam 60 can be white, grey or black, according to attaching Foam, which samples the optics on four side of backlight module, to be influenced, and different colors is selected, and foam 60 has filled up optical diaphragm group 50 to metal plate The gap of golden center 30, can be effectively prevented the microparticles object such as dust enter backlight unit and each optical diaphragm it Between, cause surface of optical diaphragm particle to scratch and influence the function of backlight module, meanwhile, metal plate center and optical diaphragm group it Between there are when gap, when backlight module is watched at side view angle, be easy to happen side view angle light leakage phenomena, foam has filled up metal plate center Gap between optical diaphragm group can effectively mitigate backlight module side view angle light leakage phenomena.

In addition, being set on light guide plate both sides to be moved in the plane at place when preventing optical diaphragm group vibrated Several convex blocks 70 are set, the convex block 70 is pressed in the x direction and the y direction in the optical diaphragm group 50, and the foam 60 is in Z It is pressed on direction in optical diaphragm group 50, is subjected to displacement with limiting optical diaphragm group 50.

The utility model can effectively be prevented by the way that a circle foam is arranged in the gap between metal plate center and optical diaphragm Only the microparticles object such as dust enters between backlight unit and optical diaphragm, while can effectively mitigate backlight module side Visual angle light leakage phenomena.

Claims (6)

1. a kind of backlight module, including backboard, the light guide plate being placed in backboard, the optical diaphragm group being placed in above light guide plate and The metal plate center being placed in above backboard, it is characterised in that: one is arranged in the gap between the metal plate center and optical diaphragm group Enclose foam.

2. backlight module according to claim 1, it is characterised in that: the backboard includes bottom plate and side wall, the metal plate Center is placed on the top of side wall.

3. backlight module according to claim 1, it is characterised in that: the foam is in a strip shape, and the four of the metal plate center A foam is respectively provided with below side.

4. backlight module according to claim 3, it is characterised in that: four foam group quadrangularlies.

5. backlight module according to claim 1, it is characterised in that: the foam with a thickness of metal plate center and optical film The size in the gap between piece.

6. backlight module according to claim 1, it is characterised in that: several convex blocks, institute is arranged in the light-guide edge It states convex block to be pressed in the x direction and the y direction in the optical diaphragm group, the foam is pressed on optical diaphragm group in z-direction On.