CN201035175Y

CN201035175Y - Improvement of light conducting plate structure of thin type backlight module

Info

Publication number: CN201035175Y
Application number: CNU2007200011410U
Authority: CN
Inventors: 陈树盛; 张庆辉
Original assignee: Taiwan Nano Electro Optical Technology Co Ltd
Current assignee: Da Yun Precision Industrial stock Co., Ltd
Priority date: 2007-01-19
Filing date: 2007-01-19
Publication date: 2008-03-12
Anticipated expiration: 2017-01-19

Abstract

The utility model relates to a light guide plate, a protruding part is formed on the light guide plate of the utility model. All the light of each light source is emitted into the light guide plate from the prominent part, and emitted from the expected direction by the light guide plate. Wherein, an inclined plane is formed on the prominent part; the diffusion processing treatment is done on the prominent part to form various forms dimming structure which can destroy the marching path of the light to make the light emitted uniformly, therefore effectively improving the uneven distribution of light-dark of the backlight module.

Description

The light conducting plate structure improvement of thin type backlight module

Technical field

The utility model relates in the side light type back light module framework, aims to provide a kind of backlight module thickness that reduces and reaches the slimming demand, and improve and practise the light conducting plate structure improvement that the bright dark inequality of backlight module is arranged.

Background technology

Generally be applied in the LCD of massaging device, can be according to the demand of actual design, and select to utilize the backlight module framework of straight-down negative or side-light type; As shown in Figure 1, be the basic structure synoptic diagram of a side light type back light module framework, these light guide plate 30 plate ends are divided into incidence surface 31, its front portion is an exiting surface 32, and the light of light source 20 is able to inject from this incidence surface 31, exiting surface 32 by light guide plate 30 fronts penetrates again, to reach the effect that light source shows.

Yet, there is following defective in this backlight module, one: because light guide plate 30 is a thin plate, diameter with respect to light source 20, light guide plate 30 narrow incidence surfaces 31 only can make light source 20 towards entering than small part light that light guide plate 30 1 sides are directly sent, and it is lower to cause light guide plate 30 coupling light sources 20 to send the efficient of light, but if light guide plate light inlet area is increased, that is can increase the thickness of light guide plate, then do not meet light, thin, short, little demand.

Its two, the light angle difference that this light source 20 sends, the light that exceeds certain angle incident light guide plate 30 can penetrate from the exiting surface 32 of contiguous incidence surface 31, forms bright spot, and then causes the bright dark and luminance nonuniformity of this backlight module.

The utility model content

In view of this, the purpose of this utility model is, reduces backlight module thickness, reaches light, thin, short, little slimming demand, and more will improve to practise has the bright problem such as luminance nonuniformity that secretly reaches of backlight module.

The technical scheme of the light conducting plate structure improvement of the utility model thin type backlight module is: this light guide plate forms a teat, and the light of each light source is then injected by this teat, and by light guide plate the direction of light from expection is penetrated; Wherein, form an inclined-plane on this teat, spread processing and handle on this inclined-plane, this diffusion processing is handled and can form the various multi-form light modulation structure bodies that destroy the light travel path on the inclined-plane, so that the light that passes through evenly penetrates.

The beneficial effects of the utility model are: can obtain a kind of backlight module thickness that reduces and reach the slimming demand, and improve and practise the light conducting plate structure improvement that the bright dark inequality of backlight module is arranged.

Description of drawings

Fig. 1 is a structural representation of commonly using backlight module;

Fig. 2 is the structural representation of backlight module in the utility model;

Fig. 3 is the structural perspective of light guide plate first embodiment in the utility model;

Fig. 4 is the structural perspective of light guide plate second embodiment in the utility model;

Fig. 5 is the structural perspective of light guide plate the 3rd embodiment in the utility model;

Fig. 6 is the structural perspective of light guide plate the 4th embodiment in the utility model;

Fig. 7 is the structural representation of light guide plate the 5th embodiment in the utility model;

Fig. 8 is the structural representation of light guide plate the 5th embodiment in the utility model;

Fig. 9 is the structural perspective of light guide plate the 5th embodiment in the utility model.

[figure number explanation]

V1, V2 tangent plane 20 light sources

30 light guide plate, 31 incidence surfaces

32 exiting surfaces, 33 teats

34 inclined-planes, 341 light modulation structure bodies

Embodiment

The light conducting plate structure improvement of the utility model thin type backlight module, be primarily aimed at that light guide plate is improved in the side light type back light module framework, as shown in Figures 2 and 3, the light guide plate 30 plate ends of whole side light type back light module are divided into incidence surface 31, its front portion is an exiting surface 32, several light sources 20 then are arranged at this incidence surface 31, as shown in the figure, each light source 20 can be pointolite, as light emitting diode, to allow the light of light source 20 be able to inject from the incidence surface 31 at light guide plate 30 end places, the exiting surface 32 by light guide plate 30 fronts penetrates again, to reach the effect that light source shows.

Wherein, this light guide plate 30 forms a teat 33 in incidence surface 31 places, make the height H 1 of this teat 33 be higher than the height H 2 of light guide plate 30, and the height H 1 of this teat 33 is greater than the diameter of light source 20, the light of each light source 20 is then injected by this teat 33, make light source 20 whole light be able to enter light guide plate 30 by teat 33, and the direction of light being expected certainly by light guide plate 30 penetrates, light guide plate light inlet area is increased, also can not increase the thickness of light guide plate, can meet light, thin, short, little slimming demand.

And this teat 33 forms the inclined-plane 34 of certain angle inclination towards the exiting surface 32 of light guide plate, and on this inclined-plane 34, spread processing and handle, on inclined-plane 34, to form the various multi-form light modulation structure bodies 341 that destroy the light travel path, so that the light that passes through evenly penetrates, and effectively the problem that the bright dark inequality of backlight module is arranged is practised in improvement, for example: its light modulation structure body 341 can form multi-form concavo-convex groove in this inclined-plane 34, shown in the embodiment of Fig. 3 and Fig. 4, can be arranged on the inclined-plane 34 in horizontal or vertical mode for V-groove, wherein its angle of the V-groove of subregion can be irregular, discontinuous variation, as shown in Figure 5; The form of its V-groove also can be as shown in Figure 6, and its inclined-plane is made up of tangent plane V1, the V2 of an above Different Slope.

Certainly, this light modulation structure body 341 can also be for multi-form pattern lines, and shown in the embodiment of Fig. 7, its pattern lines can be the plain arch road, its arc lines and be that the center expands outwardly with the light source place; This light modulation structure body can also be several sites, and shown in the embodiment of Fig. 8, and this site can be the distribution density inequality, close light source place is comparatively intensive or volume is less, then comparatively sparse or volume is bigger away from the light source place, can break up by the light that the light source place is stronger, to form equal light effect; Moreover this light modulation structure body can be for several rhombus grooves, shown in the embodiment of Fig. 9, with by this rhombus groove guide lights travel path; Above-mentioned various forms of light modulation structure body all can make the light that passes through evenly penetrate, and effectively improve to practise the bright dark problem that reaches luminance nonuniformity of backlight module is arranged.

As mentioned above, the utility model provides the side light type back light module frame another preferable feasible light conducting plate structure, so offer the application of novel patent in accordance with the law; Yet, above implementation and graphic shown in, be 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., identical such as, all should belong to of the present utility model founding within purpose and the claim.

Claims

1. the light conducting plate structure of thin type backlight module improvement is characterized in that it forms a teat, forms an inclined-plane on this teat, and the light modulation structure body that can destroy the light travel path is set on this inclined-plane.

2. the light conducting plate structure of thin type backlight module improvement according to claim 1 is characterized in that this light modulation structure body is multi-form concavo-convex groove.

3. as the light conducting plate structure improvement of thin type backlight module as described in the claim 2, it is characterized in that this concavo-convex groove is a V-groove.

4. as the light conducting plate structure improvement of thin type backlight module as described in the claim 3, it is characterized in that its angle of this V-groove is irregular, discontinuous variation.

5. as the light conducting plate structure improvement of thin type backlight module as described in the claim 3, it is characterized in that the inclined-plane of this V-groove is made up of more than one tangent plane.

6. the light conducting plate structure of thin type backlight module improvement according to claim 1 is characterized in that this light modulation structure body is multi-form pattern lines, and this pattern lines is the arc lines, its arc lines and be that the center expands outwardly with the light source place.。

7. the light conducting plate structure of thin type backlight module improvement according to claim 1 is characterized in that this light modulation structure body is several rhombus grooves.

8. the light conducting plate structure of thin type backlight module improvement according to claim 1 is characterized in that this light modulation structure body is several sites, and this site is comparatively intensive near the light source place.

9. the light conducting plate structure of thin type backlight module improvement according to claim 1 is characterized in that each light source is a pointolite.

10. as the light conducting plate structure improvement of thin type backlight module as described in the claim 9, it is characterized in that this pointolite is a light emitting diode.