CN1881026A

CN1881026A - Light source equalizing structure for backlight module assembly

Info

Publication number: CN1881026A
Application number: CN 200510075362
Authority: CN
Inventors: 曾文保
Original assignee: K Bridge Electronics Co Ltd
Current assignee: K Bridge Electronics Co Ltd
Priority date: 2005-06-16
Filing date: 2005-06-16
Publication date: 2006-12-20

Abstract

The invention discloses a light source homogenizing structure of aphototropism module between LCD light source and relative optical diaphragm, which is composed of optical board bulk and plural light conductive parts on two sides of optical diaphragm corresponding to light source, wherein the light conductive part is composed of different dense, angle or depth structure to extend in or project the optical board surface, which makes ray be distributed effectively through light source homogenizing structure diffused by at least two light conductive parts.

Description

The light source equalizing structure of module backlight

Technical field

The present invention relates to the light source equalizing structure of module backlight, particularly a kind of light source equalizing structure that is applied to down straight aphototropism mode set.

Background technology

Pressing, generally be applied in the LCD of information device, is can be according to the demand of actual design, and selects to utilize the module framework backlight of straight-down negative or side-light type; As shown in Figure 1, be the basic structure synoptic diagram of a direct-type backlight module framework, it is to be equipped with a reflection shield 10, some light sources 20, diffuser plate 30, several pieces of blooming pieces 40 from inside to outside in regular turn that the structure of whole module backlight is formed, and liquid crystal panel 50; Wherein, each light source 20 can be the fluorescent tube of vertical bar shape or U type or other continuous bending shapes and is laid between reflection shield 10 and the diffuser plate 30 with suitable spacing; And several blooming pieces 40 of 50 of also common on the market this diffuser plate 30 and liquid crystal panels can by 1-3 sheet diffusion sheet, 0～2 brightening piece, 0～1 reflecting polarized wafer etc. mutually collocation form, its effect is to make the light that passes through form diffusion, use improvement and produce because of dull thread at the position at interval, and on liquid crystal module, form phenomenon bright, the blanking bar district over against each light source 20.

Again, because the effect of diffuser plate 30 only evenly sheds at the light that order is passed through, liquid crystal module is bright for improving, the effect of blanking bar district phenomenon is limited, therefore be the gap that some module backlight painstakingly elongates light source 20 and diffuser plate 30, in the hope of enlarging the scope that each light source 20 enters diffuser plate 30, reach the purpose of dwindling dim zone; Only, so not only effect is quite limited and the thickness of module backlight will be increased for structural design, and disagrees with the lightening design original intention of liquid crystal module.

Summary of the invention

The present invention's " light source equalizing structure of module backlight " promptly at LCD in order to light that light source produced is evenly improved towards the structure of liquid crystal panel irradiation, the basic composition framework of its LCD is the light source expression effect that presents luminophor through blooming piece, liquid crystal panel equally.

Wherein, be provided with a light source equalizing structure between the light source of LCD and the relevant blooming piece, it is mainly by an optics plate body, and this optics plate body corresponds to the set a plurality of light guide in each light source and blooming piece both sides and forms, this light guide is for stretching into or protrude in the different densities of this optics plate body plate face, the structure of the angle or the degree of depth constitutes, before making the light of light source inject blooming piece, be able to by this light source equalizing structure, the light that passed through of order is at least through the diffusion of twice light guide, use the dim zone of eliminating between each light source, with more active, positive means, effectively solving the known backlit module obviously presents bright, the problem in blanking bar district can more effectively be distributed the light of light source.

Description of drawings

Fig. 1 is the structural representation of known backlit module;

Fig. 2 is the structural perspective of light guide first embodiment of the present invention;

Fig. 3 (A), (B) are the structural perspective for second and third embodiment of light guide of the present invention;

Fig. 4 is the structural representation of down straight aphototropism mode set among the present invention;

Fig. 5 (A), (B) are the light configuration schematic diagram of down straight aphototropism mode set among the present invention;

Fig. 6 is the structural representation of down straight aphototropism mode set among the present invention;

Fig. 7 is the structural perspective of light source of the present invention and optics plate body.

[figure number explanation]

10 reflection shields

20 light sources.

30 blooming pieces

50 liquid crystal panels

60 optics plate bodys

61 light guides

62 refraction part

Embodiment

For making your auditor know composition of the present invention, and embodiment, cooperate graphic being described as follows now:

The present invention's " light source equalizing structure of module backlight ", mainly be between the light source of LCD and relevant blooming piece, to be provided with a light source equalizing structure, it is mainly by an optics plate body, and this optics plate body corresponds to the set a plurality of light guide in each light source and blooming piece both sides and forms, this light guide is for stretching into or protrude in the different densities of this optics plate body plate face, the structure of the angle or the degree of depth constitutes, before making the light of light source inject blooming piece, be able to by this light source equalizing structure, the light that order is passed through can more effectively distribute the light of light source at least through the diffusion of twice light guide.

When concrete enforcement, as shown in Figure 2, each light guide 61 of light source equalizing structure can be by several structures outstanding or the pit multiple-angle pyramid as shown in the figure, and in the present embodiment, the spacing of each light guide is to be less than or equal to 1mm, and each light guide stretches into or protrudes in the degree of depth of this optics plate body plate face or highly be to be less than or equal to 0.5mm, each light guide 61 also can be constituted by structure outstanding by several or the pit groove, its groove is made up of two refraction part 62 that stretch into or protrude in these optics plate body 60 plate faces, this two refraction part 62 can form the configuration of different angles mutually, shown in Fig. 3 (A) or shown in Fig. 3 (B), can form the configuration mode of different depth, can be with should outstanding structure or the pit structure is designed to the structural form that one extends whole optics plate body 60, and all can be to the light formation diffusion of being passed through, moreover, the material of this optics plate body 60 can be transparent rectangular structure or adds diffusant, [for example silicon dioxide (SiO2) or titania (TiO2) etc.] made white vaporific rectangular structure by the clear plastic material as: PC (polycarbonate) or PMMA (polymethylmethacrylate).

In the embodiment shown in fig. 4, the basic composition framework of LCD, the inside of one reflection shield 10 on average is laid with light source 20, and be covered with optics plate body 60 (can be the material of general diffuser plate) in regular turn and by the blooming piece 30 that forms of collocation mutually such as the diffusion sheet of 1-3 sheet, 0～2 brightening piece, 0～1 reflecting polarized wafer at the opening part of reflection shield 10, and liquid crystal panel 50, in order to seeing through the light source expression effect that presents light source 20 by blooming piece 30 and liquid crystal panel 40; Wherein each light source 20 can be the fluorescent tube of vertical bar shape or U type or other continuous bending shapes and is laid between reflection shield 10 and the blooming piece 30 with suitable spacing, or is arranged between reflection shield 10 and the diffuser plate 30 with suitable spacing by light-emittingdiode.

Therefore, each light guide 61 can see through optics plate body 60, and to be erected at the mode of reflection shield 10 opening parts corresponding with each light source 20, again blooming piece 30 and liquid crystal panel 50 are stacked in optics plate body upper strata in regular turn, wherein shown in the embodiment of Fig. 5 (A), before making the light of light source 20 inject blooming piece 30, be able to by this light source equalizing structure, the light that passed through of order is at least through the diffusion of twice light guide 61, use the dim zone of eliminating between each light source 20, with more active, positive means, effectively solving the known backlit module obviously presents bright, the problem in blanking bar district can more effectively be distributed the light of light source; And the arrangement of each light guide 61 can be depicted as continuity as the embodiment as Fig. 5 (A), perhaps can be noncontinuity, shown in Fig. 5 (B).

In addition, as Figure 6 and Figure 7 is another basic composition framework of LCD, optics plate body 60 be with each light source 20 over against the position be provided with an incidence surface 61, and be provided with an exiting surface 62 in blooming piece 30 positions of module backlight, its blooming piece 30 can be by light guide plate, 1～3 diffusion sheet, 0～2 brightening piece, collocation such as 0～1 reflecting polarized wafers etc. mutually form, in this embodiment, the position, plate end that module backlight is provided in a side of blooming piece 30 is provided with reflection shield 10, each light source 20 then is provided in blooming piece 30 medial region, and its light is penetrated towards blooming piece 30 plate faces towards the direction projection back of blooming piece 30.

The exiting surface of aforementioned optics plate body 60 promptly is right against the plate end position of blooming piece 30, so be about to each light source 20 injects optics plate body 60 from incidence surface 61 light and enter the light source expression effect that blooming piece 30 and liquid crystal panel 50 present light source 20, to allow whole module backlight produce the brightness expression effect of expection via exiting surface 62.

As mentioned above, the invention provides module one preferable feasible light source equalizing structure backlight, so offer the application of patent of invention in accordance with the law; Yet, shown in the above implementation and stationary, be preferred embodiment person of the present invention, be not to limit to the present invention with this, be with, approximate with structure of the present utility model, device, feature etc. such as, identical, all should belong to creation purpose of the present utility model and claim in.

Claims

1, a kind of light source equalizing structure of module backlight includes the light source and relevant blooming piece of LCD, it is characterized in that:

Between the light source of LCD and relevant blooming piece, be provided with a light source equalizing structure, this light source equalizing structure is mainly by an optics plate body, and this optics plate body corresponds to the set a plurality of light guide in each light source and blooming piece both sides and forms, this light guide is the different densities that stretches into or protrude in this optics plate body plate face, the structure of the angle or the degree of depth constitutes, before making the light of light source inject blooming piece, be able to by this light source equalizing structure, the light that order is passed through is through the diffusion of at least twice light guide, the light that is more effectively distributed light source is to obtain the module backlight of a light source equalizing.

2, the light source equalizing structure of module backlight according to claim 1, wherein, each light source of this LCD is to be laid in the reflection shield, this light source equalizing structure promptly is erected at the opening part of this reflection shield, and this blooming piece and a liquid crystal panel then are stacked in the upper strata of this light source equalizing structure in regular turn.

3, the light source equalizing structure of module backlight according to claim 1, wherein, each light source of this LCD is to be laid in the reflection shield, this light source equalizing structure promptly is erected at the opening part of this reflection shield, the optics plate body of this light source equalizing structure with light source over against the position be provided with an incidence surface, and being provided with an exiting surface at plate end position over against blooming piece, each light guide promptly is arranged on the position of incidence surface and exiting surface.

4, the light source equalizing structure of module backlight according to claim 1, wherein, this optics plate body is a diffuser plate, the blooming piece on it then by 1～3 diffusion sheet, 0～2 brightening piece, 0～1 reflecting polarized wafer etc. mutually collocation form.

5, the light source equalizing structure of module backlight according to claim 1, wherein, this blooming piece then by diffuser plate, 1～3 diffusion sheet, 0～2 brightening piece, 0～1 reflecting polarized wafer etc. mutually collocation form.

6, the light source equalizing structure of module backlight according to claim 1, wherein, this each light source is the fluorescent tube of vertical bar shape or U type or other continuous bending shapes or is light-emittingdiode, and is laid between reflection shield and the diffuser plate with suitable spacing.

7, the light source equalizing structure of module backlight according to claim 1, wherein, each light guide is made of outstanding or pit multiple-angle pyramid or the groove that one extends this position.

8, the light source equalizing structure of module backlight according to claim 1, wherein, this optics plate body is transparent rectangular structure or the vaporific rectangular structure of white.

9, the light source equalizing structure of module backlight according to claim 1, wherein, it is comparatively intensive that this light guide is arranged at the density that corresponds between each light source.

10, the light source equalizing structure of module backlight according to claim 1, wherein, the spacing between each light guide is less than or equal to 1mm.

11, the light source equalizing structure of module backlight according to claim 1, wherein, the degree of depth that each light guide protrudes in the height of this optics plate body plate face and/or stretches into this optics plate body plate face is less than or equal to 0.5mm.