CN201724080U

CN201724080U - Elastic Ejection Mechanism of Backlight Module and Liquid Crystal Display

Info

Publication number: CN201724080U
Application number: CN2010201178102U
Authority: CN
Inventors: 蔡佳升
Original assignee: Forhouse Corp
Current assignee: Da Yun Precision Industrial Stock Co Ltd
Priority date: 2010-02-11
Filing date: 2010-02-11
Publication date: 2011-01-26
Anticipated expiration: 2020-02-11

Abstract

The utility model discloses an elastic ejection mechanism of a backlight module and a liquid crystal display. The backlight module at least comprises: a light guide plate, a light source module and a plastic frame. The light guide plate is provided with a light entrance side and two side sides adjacent to the light entrance side, and the light source module is arranged at the light guide plate opposite to the light entrance side, wherein the plastic frame is provided with first, second, third and fourth side walls, and a containing space is defined between the four side walls. The light source module is arranged in the containing space and close to the first side wall, and the ejection mechanism is arranged on the third side wall opposite to the first side wall, and the ejection mechanism is provided with an elastic member and an ejection member, one end of the elastic member abuts against the third side wall, and the other end enables the ejection member to normally move toward the light source module. The design of the ejection mechanism can reduce the gap between the light guide plate and the light source, so as to improve the phenomenon of decreased optical brightness and uniformity of the module.

Description

The elasticity ejecting mechanism and the LCD of backlight module

Technical field

The utility model is improved at glue frame in the backlight module, aims to provide a kind of phenomenon of improving module optics briliancy and uniformity decline, guarantees the elasticity ejecting mechanism of display effect.

Background technology

The flat-panel screens industry was fast-developing in recent years, and in order more to promote display performance, industry all is devoted to the improvement and the design of each modular construction, and the backlight module in the LCD, especially towards providing high direction even, higher source luminance to improve.

Because liquid crystal itself can be not luminous, must add backlight (for example fluorescent tube or light emitting diode) at the display panels rear, after light source projects gone out, earlier through a Polarizer and then through liquid crystal, this moment, LCD changed the arrangement mode of liquid crystal molecule with regard to the variation that utilizes voltage, and and then changed the light angle that penetrates liquid crystal.Therefore, just can control the light intensity of last appearance as long as change the magnitude of voltage that can stimulate liquid crystal to change, and then the color combination of the different depths can on liquid crystal panel, occur.

According to the difference of light source position, backlight module generally can be divided into two kinds of side-light type (Edge Lighting) and straight-down negatives (Bottom Lighting).Side light type back light module generally is usually used in middle-size and small-size display, as mobile computer screen, PDA and mobile phone screen etc.; And wherein, LGP is the key part and component of side light type back light module, its main function be with light by the edge guiding direction of visual lines, the light that concentrates on the edge by LGP, is led whole sight line place in one's power equably.

The glue frame of known backlight modular structure is in order to fixed light source unit, blooming pieces such as LGP or printed circuit board (PCB); LGP 11 is embedded at module glue frame 12 central authorities, as shown in Figures 1 and 2, and light source 13 places a lateral location of glue frame 12, and when assembling light source 13 and LGP 11 between be easy to generate the gap, make the briliancy and the uniformity of integral module descend, thereby reduced display effect.

The utility model content

The technical problem that the utility model solved is promptly providing a kind of glue frame improvement of backlight module, and particularly a kind of phenomenon of improving module optics briliancy and uniformity decline is guaranteed the glue frame elastic construction of display effect.

The technical solution of the utility model is: a kind of elasticity ejecting mechanism of backlight module, and it includes at least: a LGP, this LGP are provided with a light inlet side and two avris adjacent with the light inlet side; One glue frame, this glue frame is provided with first, second, third, fourth sidewall, and defines an accommodation space between four sidewalls; One light source module, this light source module are located in the accommodation space and close this first side wall, and this light source module is located at the relative light inlet side of this LGP place; And at least one ejecting mechanism, this ejecting mechanism is located at three sidewall relative with the first side wall, and this ejecting mechanism is provided with elastic component and ejector, and this elastic component one end is resisted against on the 3rd sidewall, and end then makes the ejector normality move toward the light source module direction in addition.

Wherein, be provided with one in order to be connected the dividing plate of elastic component and ejector between this elastic component and ejector.

This ejecting mechanism is provided with unitary elasticity part and single ejector.

This ejecting mechanism is provided with plural elastic component and plural ejector.

This ejecting mechanism is provided with unitary elasticity part and plural ejector.

This ejecting mechanism is provided with plural elastic component and single ejector.

The length of this light inlet side is less than the length of avris.

A kind of LCD, it includes at least: a LGP, this LGP are provided with a light inlet side and two avris adjacent with the light inlet side; One light source module, this light source module are located at the relative light inlet side of this LGP place; One glue frame, this glue frame is provided with first, second, third, fourth sidewall, and defines an accommodation space between four sidewalls, and this light source module is located in the accommodation space and close this first side wall; At least one ejecting mechanism, this ejecting mechanism are located at three sidewall relative with the first side wall, and this ejecting mechanism is provided with elastic component and ejector, and this elastic component one end is resisted against on the 3rd sidewall, and end then makes the ejector normality move toward the light source module direction in addition; And a liquid crystal panel, this liquid crystal panel is located at this LGP top.

Wherein, also be provided with plural blooming piece between this LGP and liquid crystal panel.

This blooming piece is diffusion sheet or prismatic lens.

The beneficial effects of the utility model are: backlight module includes less: a LGP, one light source module and a glue frame, this LGP is provided with a light inlet side and two avris adjacent with the light inlet side, and this light source module is located at the relative light inlet side of this LGP place, wherein, this glue frame is provided with first, second, the 3rd, the 4th sidewall, and define an accommodation space between four sidewalls, this light source module is located in the accommodation space and close this first side wall, and this ejecting mechanism is located at three sidewall relative with the first side wall, and this ejecting mechanism is provided with elastic component and ejector, this elastic component one end is resisted against on the 3rd sidewall, end then makes the ejector normality move toward the light source module direction in addition, can reduce the gap of LGP and light source by the design of ejecting mechanism, to improve the phenomenon that module optics briliancy and uniformity descend, guarantee display effect.

Description of drawings

Fig. 1 is the STRUCTURE DECOMPOSITION figure that commonly uses backlight module;

Fig. 2 is a structural representation of commonly using glue frame and LGP;

Fig. 3 is the STRUCTURE DECOMPOSITION figure of backlight module in the utility model;

Fig. 4 is the structural perspective of ejecting mechanism and LGP in the utility model;

Fig. 5 is not positioned over structural representation in the glue frame for LGP in the utility model;

Fig. 6 is positioned over structural representation in the glue frame for LGP in the utility model;

Fig. 7 is the structural representation of ejecting mechanism second embodiment in the utility model;

Fig. 8 is the structural representation of ejecting mechanism the 3rd embodiment in the utility model.

[figure number explanation]

LGP 11 glue frames 12

Light source 13 gaps 14

LGP 20 light inlet sides 21

Avris 22,23 light emitting diodes 30

Glue frame 40 the first side walls 41

Second sidewall 42 the 3rd sidewall 43

Groove 431 the 4th sidewall 44

Accommodation space 45 ejecting mechanisms 50

Elastic component 51 ejectors 52

Dividing plate 53

The specific embodiment

The elasticity ejecting mechanism and the LCD of the utility model backlight module, its backlight modular structure as shown in Figures 3 and 4, it includes at least:

One LGP 20, this LGP 20 are provided with a light inlet side 21 and two avris 22,23 adjacent with light inlet side 21, and the length of this light inlet side 21 is less than the length of avris 22,23;

One light source module, this light source module 30 (can be plural light emitting diode) are located at this LGP 20 relative light inlet sides 21 places; And

One glue frame 40, this glue frame 40 are provided with first, second, third,

fourth sidewall

41,42,43,44, and four 41,42,43,44 of sidewalls define an accommodation space 45, and this light source module 30 is located in the accommodation space 45 and near this first side wall 41.

At least one ejecting mechanism 50, this ejecting mechanism 50 is located in the 3rd sidewall 43 default grooves 431 relative with the first side wall 41, and this ejecting mechanism 50 is provided with elastic component 51 (can be spring) and

ejector

52,52 of this elastic component 51 and ejectors are provided with a dividing plate 53, this dividing plate 53 is in order to connect elastic component 51 and ejector 52, these elastic component 51 1 ends are resisted against on the 3rd sidewall 43, end then makes ejector 52 normalities move toward light source module 30 directions in addition, as shown in Figure 5, this elastic component 51 and dividing plate 53 are arranged in this groove 431, and this ejector 52 exposes to groove 431.

So when LGP 20 was arranged in this accommodation space 45, this ejector 52 can be subjected to the drive of elastic component 51, LGP 20 can be pushed against towards light source module 30 directions, as shown in Figure 6, to reduce the gap of LGP 20 and light source module 30.

Moreover, this ejecting mechanism 50 can be shown in the embodiment of Fig. 4, be provided with unitary elasticity part 51 and single ejector 52, shown in second embodiment of Fig. 7, this ejecting mechanism 50 is provided with plural elastic component 51 and plural ejector 52, perhaps, shown in the 3rd embodiment of Fig. 8, this ejecting mechanism 50 is provided with plural elastic component 51 and single ejector 52, also or, this ejecting mechanism is provided with unitary elasticity part and plural ejector (figure does not show).

Backlight module of the present utility model also can form LCD further combined with liquid crystal panel is arranged, this liquid crystal panel is located at this LGP top, and also can be provided with plural blooming piece (for example diffusion sheet or prismatic lens) between this LGP and liquid crystal panel, to strengthen display effect.

It is worth mentioning that the utility model has compared to habit and has following advantages:

1, ejecting mechanism of the present utility model can reduce the gap of LGP and light source module, with briliancy and the uniformity decreases phenomenon of improving module, guarantees display effect.

2, when the Integral back optical module carries out environmental testing, the elastic component of this ejecting mechanism provides elasticity, can utilize this resilient characteristic can absorb the buckling deformation that LGP raises and produces because of temperature humidity.

Claims

1. A kind of elastic ejection mechanism of backlight module, it is characterized in that, it comprises at least:

A light guide plate, the light guide plate is provided with a light incident side and two sides adjacent to the light incident side;

A plastic frame, the plastic frame is provided with first, second, third, and fourth side walls, and an accommodating space is defined between the four side walls;

A light source module, the light source module is arranged in the accommodating space and close to the first side wall, and the light source module is arranged on the light incident side of the light guide plate; and

At least one ejection mechanism, the ejection mechanism is arranged on the third side wall opposite to the first side wall, and the ejection mechanism is provided with an elastic member and a pusher member, and one end of the elastic member leans against the third side wall , while the other end makes the ejector move normally towards the light source module.

2 . The elastic ejecting mechanism of the backlight module according to claim 1 , wherein a partition for connecting the elastic member and the ejecting member is provided between the elastic member and the ejecting member. 3 .

3. The elastic ejecting mechanism of the backlight module according to claim 1 or 2, wherein the ejecting mechanism is provided with a single elastic member and a single ejecting member.

4. The elastic ejecting mechanism of the backlight module according to claim 1 or 2, wherein the ejecting mechanism is provided with a plurality of elastic members and a plurality of ejecting members.

5. The elastic ejecting mechanism of the backlight module according to claim 1 or 2, wherein the ejecting mechanism is provided with a single elastic member and a plurality of ejecting members.

6. The elastic ejecting mechanism of the backlight module according to claim 1 or 2, wherein the ejecting mechanism is provided with a plurality of elastic elements and a single ejecting element.

7. The elastic ejecting mechanism of the backlight module according to claim 1 or 2, wherein the length of the light-incident side is smaller than the length of the side.

8. A liquid crystal display, characterized in that it at least includes:

a light source module, the light source module is arranged on the light incident side of the light guide plate;

A plastic frame, the plastic frame is provided with first, second, third, and fourth side walls, and an accommodating space is defined between the four side walls, and the light source module is arranged in the accommodating space and is close to the first side wall;

At least one ejection mechanism, the ejection mechanism is arranged on the third side wall opposite to the first side wall, and the ejection mechanism is provided with an elastic member and a pusher member, and one end of the elastic member leans against the third side wall , while the other end makes the ejector normally move towards the direction of the light source module; and

A liquid crystal panel is arranged above the light guide plate.

9. The liquid crystal display according to claim 8, wherein a plurality of optical films are also arranged between the light guide plate and the liquid crystal panel.

10. The liquid crystal display according to claim 8, wherein the optical film is a diffusion film or a prism film.