CN2762178Y

CN2762178Y - Improved structure of light guiding of light conducting board

Info

Publication number: CN2762178Y
Application number: CN 200520001444
Authority: CN
Inventors: 曾文保
Original assignee: K Bridge Electronics Co Ltd
Current assignee: K Bridge Electronics Co Ltd
Priority date: 2005-01-24
Filing date: 2005-01-24
Publication date: 2006-03-01
Anticipated expiration: 2015-01-24

Abstract

The utility model relates to a light guiding board which is provided with a light-in surface which receives light source of a luminous body, a bottom surface which is connected with the light-in surface and a light-out surface which is opposite to the bottom surface and is used for outputting the light source of the luminous body. The luminous body is arranged on one side of the light-in surface of the light guiding board, wherein the light-in surface of the light guiding board is provided with a plurality of multi-angle conical body structures, and the light-in light source of the luminous body plays a role of increasing the diffusion function of the light source by the multi-angle conical body structures. Thus, the light source generated from the luminous body can uniformly emit towards the light-out surface of the light guiding board.

Description

The improvement of light guide plate light entrance structures thereof

Technical field

The utility model relates to the light guide plate light entrance structures thereof improvement of LCD, aims to provide a kind of effective diffusion effect that improves the light guide plate incidence surface.

Background technology

As shown in Figure 1, be to be the basic composition framework of general liquid crystal module and the light source projects organigram of being commonly used, it has generally included a luminophor (this luminophor is based on light-emittingdiode 10 among this figure embodiment), one light guide plate 20, one diffuser plate 30, one prismatic lens 40 and a liquid crystal panel 50, wherein diffuser plate 30 is arranged in this light guide plate 20 tops in regular turn with prismatic lens 40, this light guide plate 20 is made by polymeric resin material, shape roughly is wedge shape, it comprises an incidence surface 21, one exiting surface 22, one and angled bottom surfaces 23 relative with exiting surface 22, luminophor 10 is arranged at a side of light guide plate incidence surface 21, receive the light source of light-emittingdiode 10 by incidence surface 21, via bottom surface 23 light source is derived by exiting surface 22, again by diffuser plate 30, behind the prismatic lens 40, towards liquid crystal panel 50 irradiations.

Again, because the effect of diffuser plate 30 is only evenly spread 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 guide plate 20 and diffuser plate 30, the scope that the light that is shed by light guide plate 20 in the hope of expansion enters diffuser plate 30 reaches the purpose of dwindling dim zone; Yet so not only effect is quite limited for structural design, and the thickness of module backlight will be increased, and disagrees with the lightening design original intention of liquid crystal module.

The utility model content

The improvement of the utility model light guide plate light entrance structures thereof, promptly at LCD in order to light source that luminophor produced is evenly improved towards the structure of liquid crystal panel irradiation, the light guide plate of its LCD is to have the incidence surface of accepting the luminophor light source, the bottom surface that links to each other with above-mentioned incidence surface and relative to the bottom surface the exiting surface with the output of luminophor light source, luminophor then is arranged at a side of light guide plate incidence surface, and luminophor is the expression effect that presents light source through light guide plate, blooming piece, liquid crystal panel equally.

Wherein, the incidence surface of light guide plate has a plurality of multiple-angle pyramid structures, and the light incidence source of luminophor can increase the light source diffusion via the multiple-angle pyramid structure, makes the light source homogenising.

Description of drawings

Fig. 1 is the light source projects organigram for general liquid crystal module;

Fig. 2 is the light guide plate structure stereoscopic figure for the utility model first embodiment;

Fig. 3 is the light guide plate structure stereoscopic figure for the utility model second embodiment;

Fig. 4 is the light guide plate structure stereoscopic figure for the utility model the 3rd embodiment;

Fig. 5 is the light guide plate structure stereoscopic figure for the utility model the 4th embodiment;

Fig. 6 is the light guide plate structure stereoscopic figure for the utility model the 5th embodiment.

[figure number explanation]

10 light-emittingdiodes

10 ' fluorescent tube

20 light guide plate

21 incidence surfaces

22 exiting surfaces

23 bottom surfaces

24 multiple-angle pyramid structures

30 diffuser plates

40 prismatic lenses

50 liquid crystal panels

Embodiment

The clear structure of the present utility model of your auditor is formed, and the overall operation mode, cooperate graphic being described as follows now:

The improvement of the utility model light guide plate light entrance structures thereof, mainly be that incidence surface in light guide plate has a plurality of multiple-angle pyramid structures, by the light source generation diffusion of multiple-angle pyramid structure,, allow LCD obtain preferable display effect so as to evenly presenting the light source of each luminophor to luminophor.

When concrete enforcement, the structure of its module backlight equally as shown in Figure 1, by luminophor (this luminophor is based on light-emittingdiode 10 among this figure embodiment), one light guide plate 20, one diffuser plate 30, one prismatic lens 40 and a liquid crystal panel 50 constitute, wherein diffuser plate 30 is arranged in this light guide plate 20 tops in regular turn with prismatic lens 40, its light guide plate is by the integrated structure of polymer resin material, it has the incidence surface 21 of accepting light-emittingdiode 10 light sources, the bottom surface 23 that links to each other with above-mentioned incidence surface 21 and relative to the exiting surface 22 with the output of light-emittingdiode 10 light sources with bottom surface 23, light-emittingdiode 10 then is arranged at a side of light guide plate incidence surface.

Focusing on of this case:

The incidence surface 21 of this light guide plate 20 has a plurality of multiple-angle pyramid structures 24, it is evenly distributed that this multiple-angle pyramid structure 24 can form continuous regular, and the taper portion of its multiple-angle pyramid structure 24 can protrude the incidence surface mode and be provided with, as shown in Figure 2, perhaps (as shown in Figure 3) is set for recessed incidence surface mode, certainly, the arrangement mode of each a plurality of multiple-angle pyramid structure 24 also can form discontinuous regularly arranged, as Fig. 4 and shown in Figure 5, make the light source of incidence surface 21 receptions of light guide plate 20 from sidepiece light-emittingdiode 10, increase diffusingsurface by multiple-angle pyramid structure 24 and form scattering process, form the light source of evenly dispersing after the reflection by bottom surface 23 again, derive by exiting surface 22, again by diffuser plate 30, behind the prismatic lens 40, towards liquid crystal panel 50 irradiations.

In addition, this luminophor also can be shown in the embodiment of Fig. 6, be with fluorescent tube 10 ' constituted, because of the light source of fluorescent tube 10 ' two sides a little less than, so incidence surface 21 of this light guide plate 20, and the corresponding section near fluorescent tube 10 ' two sides has a plurality of multiple-angle pyramid structures 24, increases diffusingsurface by multiple-angle pyramid structure 24 and forms scattering process, to increase the even bright dipping of light source.

As mentioned above, the utility model provides module backlight another preferable feasible light guide plate light entrance structures thereof, so, offer the application of novel patent in accordance with the law; Yet, above implementation and graphic shown in, be one of the utility model preferred embodiment, be not to limit to the utility model with this, be with, approximate with structure of the present utility model, device, feature etc. such as, identical, all should belong within creation purpose of the present utility model and the claim.

Claims

1, a kind of light guide plate light entrance structures thereof improvement, its light guide plate is to have the incidence surface of accepting the luminophor light source, the bottom surface that links to each other with this incidence surface and relative to the bottom surface the exiting surface with the output of luminophor light source, and luminophor then is arranged at a side of light guide plate incidence surface; It is characterized in that: the incidence surface of this light guide plate has a plurality of multiple-angle pyramid structures.

2, light guide plate light entrance structures thereof improvement according to claim 1, it is characterized in that: each a plurality of multiple-angle pyramid structure is that continuous regular is evenly distributed.

3, light guide plate light entrance structures thereof improvement according to claim 1 is characterized in that: each a plurality of multiple-angle pyramid structure is that non-continuous regular is arranged.

4, light guide plate light entrance structures thereof improvement according to claim 1 is characterized in that: the taper portion of each a plurality of multiple-angle pyramid structure protrudes the incidence surface mode to be provided with.

5, light guide plate light entrance structures thereof improvement according to claim 1 is characterized in that: the taper portion of each a plurality of multiple-angle pyramid structure is that recessed incidence surface mode is provided with.

6, light guide plate light entrance structures thereof improvement according to claim 1, it is characterized in that: this luminophor can be fluorescent tube, the corresponding section of the incidence surface of this light guide plate and close fluorescent tube two sides has a plurality of multiple-angle pyramid structures.