CN201007769Y

CN201007769Y - Structure improvement of backlight module

Info

Publication number: CN201007769Y
Application number: CNU2006201209693U
Authority: CN
Inventors: 蔡荣智
Original assignee: Taiwan Nano Electro Optical Technology Co Ltd
Current assignee: Fuxiang Industrial Co., Ltd.
Priority date: 2006-09-22
Filing date: 2006-09-22
Publication date: 2008-01-16
Anticipated expiration: 2016-09-22

Abstract

The utility model relates to a light guide plate of a backlight module for converting a straight light entered by a luminescent assembly into an assembly which is perpendicular to a plane ray. A lower panel and an upper panel of the light guide plate are respectively constructed with a first collecting light prism mechanism and a second collecting light prism mechanism which are of a continuous saw tooth groove shape, and the first collecting light prism mechanism and the second collecting light prism mechanism of the lower panel and the upper panel are respectively arranged at an X direction and a Y direction. A prism sheet is arranged on the upper portion of the light guide plate, the upper panel of the prism sheet is also constructed with a third collecting light prism mechanism which is of a continuous saw tooth groove shape. The second collecting light prism mechanism and the third collecting light prism mechanism are respectively arranged at a same or a different direction, thereby the luminance of the ray which is jetted by the luminescence assembly through the light guide plate and the prism sheet is high, the using of other optical diaphragms are capable of being reduced, and the thickness of the backlight module is effectively reduced.

Description

The structural improvement of backlight module

Technical field

The utility model aims to provide a kind of light briliancy that improves at the structural improvement of backlight module, and can reduce the use of other blooming piece, with the backlight modular structure improvement of effective reduction backlight module thickness.

Background technology

General LCD (Liquid Crystal Display, the basic structure of backlight module LCD) is formed as shown in Figure 1, by light guide plate (LGP) 11, be located at the luminescence component 12 (cold cathode fluorescent lamp for example: Cold Cathode Fluorescernt Lamp of light guide plate 11 plate edge positions, CCFL), be located at the reflection diaphragm 13 of light guide plate 11 belows, and the assemblies of being located between light guide plate 11 and the display panel 30 such as diffusion barrier sheet 14 constitute.

Wherein, the major function of light guide plate 11 is to convert the light that directly advances of luminescence component 12 incidents to vertical plane light by light principle at random, but in order to reach all effects of light of scattering, usually between diffusion barrier sheet 14 and display panel 40, can be equipped with two diaphragms 15 that add lustre to, and be provided with light harvesting prism mechanism 151 (light harvesting prism mechanism is continuous sawtooth channel form) in diaphragm 15 upper faces that respectively add lustre to, with the equal effect of light of scattering; Yet the use of the diaphragm that adds lustre to has in addition not only increased cost, and also increases the thickness of backlight module.

The utility model content

In view of this, the purpose of this utility model is: a kind of light briliancy that improves is provided, and can reduces the use of other blooming piece, with the backlight modular structure improvement of effective reduction backlight module thickness.

The technical scheme that the utility model adopted promptly to the upper and lower plate face of light guide plate respectively construction first and second light harvesting prism mechanism that is continuous sawtooth channel form is arranged, first and second light harvesting prism mechanism of this upper and lower plate face becomes X, Y direction to arrange respectively, and the light guide plate top is provided with a prismatic lens, the upper face of its prismatic lens also construction has the 3rd light harvesting prism mechanism that is continuous sawtooth channel form, and its second and third light harvesting prism mechanism becomes identical or different direction to arrange respectively.

The beneficial effects of the utility model are: make luminescence component higher via the light briliancy that light guide plate and prismatic lens penetrate, and can reduce the use of other blooming piece, with the thickness of effective reduction backlight module.

Description of drawings

Fig. 1 forms Organization Chart for commonly using the backlight liquid crystal display module;

Fig. 2 is the structural perspective of light guide plate in the utility model;

Fig. 3 is the structural representation of first angle in the utility model;

Fig. 4 is the structural representation of the utility model the 4th angle;

Fig. 5 is that the backlight liquid crystal display module is formed Organization Chart in the utility model;

Fig. 6 is another structural perspective of light guide plate in the utility model;

Fig. 7 is a structural perspective again of light guide plate in the utility model.

[figure number explanation]

11 light guide plate, 12 luminescence components

13 reflection diaphragms, 14 diffusion barrier sheets

The 15 diaphragm 151 light harvesting prism mechanism of adding lustre to

21 light guide plate, 211 first light harvesting prism mechanism

212 second light harvesting prisms mechanism, 213 first angles

22 prismatic lenses 221 the 3rd light harvesting prism mechanism

222 the 4th angles, 23 luminescence components

The optics mechanism of 24 reflection diaphragms, 25 atomizings

31 first hypotenuses, 311 first angles

32 second hypotenuses, 321 second angles

40 display panels, 50 diffusion sheets

Embodiment

The structural improvement of the utility model backlight module, the light guide plate of its backlight module is that luminescence component incident directly advanced the assembly that light converts vertical plane light to, as shown in Figure 2, in the specific implementation, light guide plate 21 can be by the manufacturing of acryl material, and directly following, the upper face construction has and is first of continuous sawtooth channel form, two light harvesting prism mechanism 211,212, it is located at light guide plate 21 times, first of upper face, two light harvesting prism mechanism 211,212 become X respectively, the Y direction is arranged, it is horizontal and have first angle for example to be located at 211 one-tenths of the first light harvesting prism mechanism of lower face, the second light harvesting prism mechanism 212 of upper face then forms homeotropic alignment and has second angle 213, please consult simultaneously shown in Figure 3, this second angle 213 between 80 the degree to 140 the degree between.

Wherein, these light guide plate 21 tops are provided with a prismatic lens 22, the upper face of its prismatic lens 22 also construction has the 3rd light harvesting prism mechanism 221 that is continuous sawtooth channel form, its the 3rd light harvesting prism mechanism 221 becomes equidirectional to arrange respectively with the second light harvesting prism mechanism 212 of light guide plate 21 upper faces, and the 3rd light harvesting prism mechanism 221 is perpendicular to luminescence component 23, in this figure embodiment, 212 one-tenth homeotropic alignments of its second light harvesting prism mechanism, so 221 of the 3rd light harvesting prism mechanism form homeotropic alignment and have the 4th angle 222, as shown in Figure 4, its 4th angle 222 is between 80 degree are spent to 100.

During concrete enforcement, this luminescence component 23 is located at the plate edge position of light guide plate 21, as shown in Figure 5, light guide plate 21 belows then are provided with reflection diaphragm 24, and be located at backlight modules that assembly constitutes such as prismatic lens 22 between light guide plate 21 and the display panel 40, the light that its luminescence component 23 penetrates will directly advance light via light guide plate 21 earlier and convert vertical plane light to, after entering prismatic lens 22 again, each light harvesting prism mechanism makes light at X, Y direction light harvesting is also adjusted the divergence of beam angle, and has optically focused, add lustre to and the equal effect of light of scattering, the light briliancy that is increased, and can reduce the use of other blooming piece, with the thickness of effective reduction backlight module; Certainly, also can diffusion sheet 50 be set, to increase the diffusion effect of light source in

prismatic lens

22 and 40 of display panels.

In addition, as shown in Figure 6, this light guide plate 21 imposes atomizing in its plate face zone near avris and handles, make the optics mechanism 25 that forms atomizing near the plate face of avris, the reverse refraction of optics mechanism 25 mitigations via atomizing enters the light source of light guide plate, use to solve and commonly use light guide plate forms bright dark inequality easily in the avris zone problem, make LCD have more uniform brightness expression effect.

Moreover, each light harvesting prism mechanism can have different forms, as shown in Figure 2,211 one-tenths of the first light harvesting prism of its lower face mechanism are horizontal and have an angle, the second light harvesting prism mechanism 212 of upper face then forms homeotropic alignment and has angle, and this first light harvesting prism mechanism 211 is one group for per three dentate grooves, and has and be spaced; In the middle of embodiment shown in Figure 6, the first light harvesting prism mechanism 211 of light guide plate 21 lower faces becomes horizontal equally and has angle, 212 of the second light harvesting prism mechanism of upper face form homeotropic alignment and have angle, difference is not have any interval between the dentate groove of the first light harvesting prism mechanism 211 of lower face, but extend the lower face of whole light guide plate 21 by next-door neighbour's dentate groove, please cooperate simultaneously with reference to shown in Figure 5, the first light harvesting prism mechanism 211 of whole light guide plate 21 has first, two hypotenuses 31,32 continuous sawtooth groove, it is first years old, two hypotenuses 31,32 form first of different angles with light guide plate 21, two angles 311,321.

In addition, the 3rd light harvesting prism mechanism 221 also can form X with the second light harvesting prism mechanism 212 of light guide plate 21 upper faces, the Y direction is arranged, as shown in Figure 7,211 one-tenth of the first light harvesting prism mechanism of its lower face are horizontal, 212 of the second light harvesting prism mechanism of upper face form homeotropic alignment, and 221 one-tenths of the 3rd light harvesting prism of prismatic lens 22 upper faces mechanism are horizontal, have optically focused equally, add lustre to and the equal effect of light of scattering.

As mentioned above, the utility model provides backlight illuminating unit 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 structural improvement of a backlight module comprises light guide plate in its backlight module; It is characterized in that:

The upper and lower plate face of this light guide plate construction respectively has first and second light harvesting prism mechanism that is continuous sawtooth channel form, first and second light harvesting prism mechanism of this upper and lower plate face becomes X, Y direction to arrange respectively, and the light guide plate top is provided with a prismatic lens, the upper face of its prismatic lens also construction has the 3rd light harvesting prism mechanism that is continuous sawtooth channel form, and its second and third light harvesting prism mechanism becomes identical respectively or X, Y direction arrange.

2. the structural improvement of backlight module according to claim 1 is characterized in that the 3rd light harvesting prism mechanism is perpendicular to luminescence component.

3. the structural improvement of backlight module according to claim 1 is characterized in that, this light guide plate is laid with the optics mechanism of atomizing at its plate face near avris.

4. the structural improvement of backlight module according to claim 1, it is characterized in that, the first light harvesting prism mechanism of this lower face is to become horizontal and have first angle, the second light harvesting prism mechanism of upper face then forms homeotropic alignment and has second angle, and this first light harvesting prism mechanism is one group for per three dentate grooves, and has and be spaced.

5. the structural improvement of backlight module according to claim 1, it is characterized in that, the first light harvesting prism mechanism of this lower face is to become horizontal and have first angle, the second light harvesting prism mechanism of upper face then forms homeotropic alignment, its first light harvesting prism mechanism has the continuous sawtooth groove of first and second hypotenuse, and its first and second hypotenuse and light guide plate form first and second angle.

6. the structural improvement of backlight module according to claim 1 is characterized in that the second light harvesting prism machine of this upper face is made homeotropic alignment and had second angle, its second angle between 80 degree between 140 degree.

7. the structural improvement of backlight module according to claim 1 is characterized in that the 3rd light harvesting prism machine of this prismatic lens upper face is made homeotropic alignment and had the 4th angle, its 4th angle between 80 degree between 100 degree.