CN2696005Y

CN2696005Y - Structure of reflected light element

Info

Publication number: CN2696005Y
Application number: CN 200420001648
Authority: CN
Inventors: 曾文保
Original assignee: K Bridge Electronics Co Ltd
Current assignee: K Bridge Electronics Co Ltd
Priority date: 2004-02-17
Filing date: 2004-02-17
Publication date: 2005-04-27
Anticipated expiration: 2014-02-17

Abstract

The utility model relates to a structure of a conducting light element of an LCD panel, which primarily provides a back light assembly which can not form light and dark band regions. The utility model is provided with a light conducting element between a light source and a lower diffusion sheet; the light source makes use of light rays of the light conducting element to form proper refraction; after refraction, the refraction light ray is uniformly spread by the lower diffusion sheet; the dark band regions can not be formed among the light sources. The utility model effectively solves the known problem that the LCD panel presents obvious light and the dark band regions.

Description

The structure of light-guide device

Technical field

The utility model relates to the structure of the light-guide device of liquid crystal panel, mainly provides one and is unlikely and forms module backlight bright, the blanking bar district.

Background technology

As shown in Figure 1, be the general known back light module unit structure cut-open view of liquid crystal panel, it is to be equipped with a reflection shield 10, some light sources 20, diffuser plate 30, following diffusion sheet 40, prismatic lens 50 from inside to outside in regular turn that the structure of whole module backlight is formed; Reflecting polarized wafer or last diffusion sheet 60, and liquid crystal panel 70; 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 the display effect of its liquid crystal panel promptly is made of the light that each light source 20 sheds; Therefore, the effect of its diffuser plate 30 is to make the light that passes through form diffusion, produces because of dull thread at the position at interval so as to improving over against each light source 20, and form phenomenon bright, the blanking bar district on liquid crystal panel.

Again, because the effect of diffuser plate 30 is only evenly spread at the light that order is passed through, liquid crystal panel 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; 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 panel.

Moreover the surface that some module backlight is selected at diffuser plate imposes the delustring processing, and it is to print at diffuser plate to contain silicon dioxide (SiO ₂) or titania (TiO ₂) ink so that the surface of diffuser plate forms delustring (astigmatism) function, so as to reaching the purpose of dwindling dim zone; Yet, so the practice not only increases the manufacturing cost of diffuser plate, and make manufacture process be tending towards loaded down with trivial details, and it is to produce photoextinction in irradiate light behind the diffuser plate surface, it obviously presents bright, comparatively passiveness, passive of blanking bar district means in order to solve known liquid crystal panel, still has the space of further improvement.

The utility model content

The technical solution of the utility model is:

A kind of structure of light-guide device, its module backlight are to be equipped with a reflection shield, some light sources, number light piece diaphragm from inside to outside in regular turn, and liquid crystal panel; Wherein, each light source is to be laid between reflection shield and the following diffusion sheet for the fluorescent tube of vertical bar shape or U type or other continuous bending shapes and with suitable spacing;

This module backlight is provided with at least one light-guide device between light source and diffuser plate, this light-guide device is provided with the groove that stretches into for each light source.

This light-guide device is the structural feature that is en plaque.

This light-guide device is being laid with concavo-convex rag on the one side at least.

This light-guide device is towards on the plate face of following diffusion sheet or on the groove edge face of light-guide device, or local or all lay concavo-convex rag on the edge face of this light-guide device away from diffusion sheet down.

This concavo-convex rag is the groove of V ditch, U ditch, C ditch, more than one straight line or curve or both matched combined.

Various sags and crests (as circular point, rectangular dots, Diamond spot, multiangular point) is handled or set up to local or whole do atomizings, ink printing at least one face of this light-guide device.

This light-guide device is a transparent panel chip architecture body or for white sheet structure body or for vaporific sheet structure body

This light-guide device is by plastic material PC (polycarbonate) or PMMA (polymethylmethacrylate) or made transparent rectangular structure or the white rectangular structure of PET (polyethylene terephthalate).

This light-guide device is to add the made white vaporific rectangular structure of diffusant by clear plastic material PC (polycarbonate) or PMMA (polymethylmethacrylate).

The structure of the utility model light-guide device, mainly be between light source and following diffusion sheet, a light-guide device to be set, after making the light of light source by light-guide device form suitable refraction and reflection, shed uniformly by following diffusion sheet again, between each light source, form dim zone and be unlikely, with more initiatively, positive means, effectively solve known liquid crystal panel and obviously present problem bright, the blanking bar district, more replace diffuser plate by light-guide device, and can reduce between light source and the following diffusion sheet, further reduce the thickness of module backlight, to reach the effect of slimming.

Description of drawings

Fig. 1 is the structure cut-open view of known backlit module;

Fig. 2 is the back light module unit structure cut-open view of the utility model first embodiment;

Fig. 3 lays concavo-convex rag structure cut-open view for the utility model light-guide device towards the plate face of following diffusion sheet;

Fig. 4 is that the utility model light-guide device is laid concavo-convex rag structure cut-open view on the groove edge face at light source place;

Fig. 5 is that the utility model light-guide device is away from laying concavo-convex rag structure cut-open view on the edge face of following diffusion sheet.

[figure number explanation]

10, reflection shield

20, light source

40, following diffusion sheet

50, prismatic lens

60, reflecting polarized wafer or upward diffusion sheet

70, liquid crystal panel

80, light-guide device

81, groove

82, concavo-convex rag

Embodiment

For 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 structure of the utility model light-guide device, the basic structure of its whole module backlight is formed as shown in Figure 2, be to be equipped with a reflection shield 10, some light sources 20, following diffusion sheet 40, prismatic lens 50, reflecting polarized wafer from inside to outside in regular turn or to go up diffusion sheet 60 equally, and liquid crystal panel 70; 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 following diffusion sheet 40 with suitable spacing, and the display effect of its liquid crystal panel promptly is made of the light that each light source 20 sheds.

It focuses on: whole module backlight is provided with at least one light-guide device 80 in addition between each light source 20 and following diffusion sheet 40, its light-guide device 80 is the structural feature that are en plaque, and be provided with the groove 81 that stretches into for each light source 20, make the light of each light source 20 pass through light-guide device 80, produce suitable refraction and reflex, shed uniformly by following diffusion sheet 40 again, and be able to more initiatively, positive means are eliminated the dim zone that forms between each light source, can replace diffuser plate by light-guide device 80, and can reduce the spacing of light source 20 and following diffusion sheet 40, further reduce the thickness of module backlight, to reach the effect of slimming.

In addition, light-guide device 80 can include but not limited to PC (polycarbonate) or PMMA (polymethylmethacrylate) or PET made transparent or white rectangular structures such as (polyethylene terephthalates) by plastic material; Or be to add diffusant (silicon dioxide (SiO for example as: PC (polycarbonate) or PMMA (polymethylmethacrylate) by the clear plastic material ₂) or titania (TiO ₂) etc.) made white vaporific rectangular structure; Obtain the different light-guide device of refraction effect 80, light source 20 spacings of being complied with module reality backlight are selected the light-guide device 80 of suitable translucent effect, have practicality and applicability really.

Moreover, as shown in Figure 3, more can be further on light-guide device 80 at least one surfaces (present embodiment is towards the panel of diffusion sheet 40 down in light-guide device 80) local or all lay concavo-convex rag 82, or as shown in Figure 4, its light-guide device 80 is on the groove 81 edge faces at light source 20 places, also can be local or all lay concavo-convex rag 82, or as shown in Figure 5, its light-guide device 80 is away from also can be local on the edge face of following diffusion sheet 40 or all lay concavo-convex rag 82, this rag can be the V ditch, the U ditch, the C ditch, the groove of more than one straight line or curve or both multiple matched combined, convex surface effect by concavo-convex rag 82 produces spotlight effect, distributed the uniformly again convex surface of each concavo-convex rag 82 of the light of light source 20 is shed, more can effectively solve known liquid crystal panel and obviously present bright, the problem in blanking bar district; Certainly, also can be at least one face of light-guide device 80 local or all make atomizing, printing ink or printing treatment or lay sags and crests (as circle, rectangular dots, Diamond spot, polygonal form point etc.) also has identical effect.

As mentioned above, the utility model provides liquid crystal panel another preferable feasible back light module unit structure, can reduce the spacing of light source and diffuser plate, further reduces the thickness of module backlight, to reach the effect of slimming, so offer the application of utility model patent in accordance with the law; Yet; above implementation and graphic shown in; it is one of the utility model preferred embodiment; be not to limit to the utility model with this; therefore; all all and the utility model structure, device, feature etc. are approximate, identical, all should belong within the protection domain of founding purpose and applying for a patent of the present utility model.

Claims

1, a kind of structure of light-guide device, its module backlight are to be equipped with a reflection shield, some light sources, several pieces of blooming pieces from inside to outside in regular turn, and liquid crystal panel; Wherein, each light source is to be laid between reflection shield and the following diffusion sheet for the fluorescent tube of vertical bar shape or U type or other continuous bending shapes and with suitable spacing; It is characterized in that:

2, the structure of light-guide device as claimed in claim 1 is characterized in that: this light-guide device is the structural feature that is en plaque.

3, the structure of light-guide device as claimed in claim 1 is characterized in that: this light-guide device is being laid with concavo-convex rag on the one side at least.

4, the structure of light-guide device as claimed in claim 1 is characterized in that: this light-guide device is towards on the plate face of following diffusion sheet or on the groove edge face of light-guide device, or local or all lay concavo-convex rag on the edge face of this light-guide device away from diffusion sheet down.

5, as the structure of claim 3 or 4 described light-guide devices, it is characterized in that: this concavo-convex rag is the groove of V ditch, U ditch, C ditch, more than one straight line or curve or both matched combined.

6, the structure of light-guide device as claimed in claim 1 is characterized in that: various sags and crests is handled or set up to local or whole do atomizings, ink printing at least one face of this light-guide device.

7, the structure of light-guide device as claimed in claim 1 is characterized in that: this light-guide device is a transparent panel chip architecture body or for white sheet structure body or for vaporific sheet structure body

8, the structure of light-guide device as claimed in claim 1 is characterized in that: this light-guide device is by plastic material polycarbonate or polymetylmethacrylate or made transparent rectangular structure or the white rectangular structure of polyethylene terephtalate.

9, the structure of light-guide device as claimed in claim 1 is characterized in that: this light-guide device is to add the made white vaporific rectangular structure of diffusant by clear plastic material polycarbonate or polymetylmethacrylate.