CN201297576Y

CN201297576Y - Embedded light guide device

Info

Publication number: CN201297576Y
Application number: CNU2008201398317U
Authority: CN
Inventors: 洪惠泰; 蔡怀方; 张永朋
Original assignee: GUANGQUN LASER SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: GUANGQUN LASER SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2008-10-16
Filing date: 2008-10-16
Publication date: 2009-08-26
Anticipated expiration: 2018-10-16

Abstract

The utility model provides an embedded light guide device, which comprises a reflecting plate, and a light guide plate with a first surface and a second surface, wherein the first surface is provided with a plurality of grooves and is arranged on the reflecting plate, and at least one light source is arranged on each groove; the light source is emitted on the second surface through the light guide plate and the reflecting plate, so as to provide the better light source for the liquid crystal display devices.

Description

Embedded guiding device

[technical field]

The relevant a kind of guiding device (light guide apparatus) that is applied to the display panels field of the utility model system is particularly about a kind of adjustable lay the grain direction of travel and in conjunction with the embedded guiding device of backlight.

[background technology]

The application of liquid crystal indicator is quite extensive, wait for such as TV, computer screen, mobile phone or other electronic installations, yet, because the liquid crystal of liquid crystal indicator itself is not luminous, need to use a module backlight to provide light source to come the irradiating liquid crystal molecule, make it produce light and shade and change.And module backlight mainly can be divided into two kinds according to the position is set, and a kind of is the side-light type module backlight that is applied to the miniature dimensions screen, and is another kind of then be the down straight aphototropism mode set that is applied to medium-and-large-sized size screen.

Wherein, down straight aphototropism mode set system as shown in Figure 1, backlight 20, for example cold cathode fluorescent lamp pipe (CCFL) or light-emittingdiode (LED) module, system is set directly under the entire module, up penetrating light and light can go out to shoot out through diffuser plate 22 and little diffusion sheet 24, and the fluorescent tube number of down straight aphototropism mode set or light-emittingdiode number can be more, so that big brightness to be provided, generally be to be applied on the middle large scale liquid crystal display unit, only, diffuser plate 22 is a kind of milky white polymer, includes light material at random, so can absorb the part luminous energy that backlight 20 is sent, and the thickness of diffuser plate 22 accounts for volume greatly and again, so the light source accommodation space must increase, light is penetrated to diffuser plate, diffusion effect behind little diffusion sheet is brought into play.With commercially available 32 o'clock LCD TVs was example, and the distance h that diffuser plate 22 and cold cathode fluorescent tube are 20 can reach 23 centimetres, so the integral thickness of traditional down straight aphototropism mode set or volume are to account for sizable ratio is arranged in the entire liquid crystal display device.

Therefore, in liquid crystal indicator, how to reduce the thickness of down straight aphototropism mode set and keep the important topic really of good briliancy.In view of this, the utility model proposes and a kind ofly improve above-mentioned shortcoming in conjunction with embedded guiding device group backlight.

[summary of the invention]

Main purpose of the present utility model provides a kind of embedded guiding device, it is that module backlight and diffusion structure are directly combined, make it have less thickness, and then make the liquid crystal indicator after the assembling more frivolous, and use in conjunction with side direction light inlet and LGP, can have the light uniformization effect simultaneously.

According to the embedded guiding device that the utility model disclosed, comprise a reflecting plate, one has the LGP of a first surface and a second surface, wherein first surface is established the V-shaped groove of plural number, and the first surface position of LGP is on reflecting plate, make groove be subjected to the reflecting plate closure, and at least one side luminous light source is set in each groove, light source can make light toward the second surface outgoing by LGP and reflecting plate.

Moreover, on second surface, a diffusion sheet can be set, or second surface has the surface texture through particular design, can make light more even from second surface bright dipping ground.

The purpose of this utility model or other purposes know for the knowledgeable usually for this skill, and it is apparent and easy to know reading after the detailed content of following examples.

Previous general introduction and ensuing being described in detail all are examples, so that can further explain claim item of the present utility model.

[description of drawings]

Fig. 1 is the schematic cross-section of known down straight aphototropism mode set.

Fig. 2 (A) is the stereogram of embedded guiding device of the present utility model.

Fig. 2 (B) is the three-dimensional exploded view of embedded guiding device of the present utility model.

Fig. 2 (C) is an embedded guiding device schematic cross-section of the present utility model.

Fig. 3 is the LGP three-dimensional structure diagram of embedded guiding device of the present utility model.

Fig. 4 is the schematic cross-section of another embodiment of the present utility model.

Fig. 5 is the schematic cross-section of another embodiment of the present utility model.

The liquid crystal indicator schematic diagram that Fig. 6 uses for the utility model.

Fig. 7 is the schematic cross-section of another embedded guiding device of the present utility model.

Fig. 8 is the schematic cross-section of another embedded guiding device of the present utility model.

Fig. 9 is the schematic cross-section of another embedded guiding device of the present utility model.

The liquid crystal indicator schematic diagram that Figure 10 uses for the utility model.

Figure 11 is the schematic diagram that LGP of the present utility model is made up of plural light element.

Among the figure:

20 backlights, 22 diffuser plates

24 little diffusion sheets

30 guiding devices, 32 LGPs

321 first surfaces, 322 second surfaces

34 light sources, 36 reflecting plates

38 grooves, 40 diffusion sheets

41,42 lateral reflection plates

50 liquid crystal indicators, 521,522 Polarizers

54 display panels, 56 LGPs

561 first surfaces, 562 second surfaces

58 grooves

60 guiding devices, 62 light-emittingdiodes

64 reflecting plates, 66 diffusion sheets

67 lateral reflection plates, 68 lateral reflection plates

70 liquid crystal indicators

721,722 Polarizers, 74 display panels

80 guiding devices

82 light elements, 84 holograms

86 reflecting plates, 88 grooves

90 light-emittingdiodes

[specific embodiment]

The utility model is to disclose a kind of embedded guiding device, is equivalent to a kind of in conjunction with sidelight and straight-down negative design.

Please refer to Fig. 2 (A) and Fig. 2 (B), be respectively stereogram and the three-dimensional exploded view in conjunction with guiding device backlight of the present utility model, and, be the sectional view of embedded guiding device of the present utility model together with reference Fig. 2 (C).Embedded guiding device 30 of the present utility model is to comprise a LGP 32, plural side luminous light source 34 and a reflecting plate 36.LGP 32 is to have a first surface 321 and a second surface 322, is provided with a plurality of V-shaped grooves 38 at first surface 321, and these grooves 38 cording to each other have spacing and extension width, and the cross section angle system of groove 38 is greater than 0 and smaller or equal to 60 degree; The first surface position of LGP 32 makes reflecting plate 36 closed recess 38 on reflecting plate 36, and in each groove 38, settles a light source 34., be the schematic perspective view of LGP please together with reference Fig. 3.Wherein, the material of LGP 32 system is selected from optical grade acryl, high molecular polymer, macromolecule carbonization thing, glass or quartz.Light source 34 is to be example with the cold cathode fluorescent lamp pipe in the drawings, and the material of reflecting plate 36 is the high reflectance material.

Therefore, the light that light source 34 is sent can see through LGP 32 toward second surface 322 outgoing, and via reflecting plate 36 reflection and pass LGP to second surface 322 outgoing and go out, and in order to make the light bright dipping more even, second surface 322 can be the surface texture that has through particular design, or as shown in Figure 4, on second surface 322, increase by a diffusion sheet 40, all can help the more even of light bright dipping.And, as shown in Figure 5, the

lateral reflection plate

41,42 of tool high reflectance can be set respectively in four sides of LGP 32 again, to reduce light leak.

So the utility model is used on the liquid crystal indicator, just can provide better, better image quality, the liquid crystal indicator 50 that the utility model is as shown in Figure 6 used, comprise two Polarizers 521 parallel to each other, 522,54 of one display panels are at two Polarizers 521, between 522, be used for the display color picture, make display panels liquid crystal layer the liquid crystal anglec of rotation and produce light and shade and change, embedded guiding device of the present utility model 30 in place below display panels 54 and Polarizer 522 to provide a uniform light to display panels 54, make its normally show image.

With reference to Fig. 7, be the utility model use above-mentioned LGP 56 in conjunction with guiding device sectional view backlight.Guiding device 60 is to comprise a LGP 56, a luminous light-emittingdiode 62 and the reflecting plate 64 of plural side, 561 of the first surfaces of LGP 56 are on reflecting plate 64, make reflecting plate 64 closed recess 58, and in each groove 58, arrangement one or a plurality of light-emittingdiode 62.Therefore, the light that light-emittingdiode 62 is sent can see through LGP 32 toward second surface 322 outgoing, and via reflecting plate 64 reflection and pass LGP 32 to second surface 562 outgoing and go out, and in order to make the more even of light bright dipping, second surface 562 can be the surface texture that has through particular design, or as shown in Figure 8, on second surface 562, increase by a diffusion sheet 66, all can help the more even of light bright dipping.In like manner, as shown in Figure 9,, the

lateral reflection plate

67,68 of tool high reflectance can be set respectively again, to reduce light leak in four sides of LGP 56.

So the utility model is used on the liquid crystal indicator, just can provide better, better image quality, liquid crystal indicator of the present utility model 70 as shown in figure 10, comprise two Polarizers 721 parallel to each other, 722,74 of one display panels are at two Polarizers 721, between 722, be used for the display color picture, make display panels liquid crystal layer the liquid crystal anglec of rotation and produce light and shade and change, of the present utility model in conjunction with guiding device backlight 60 in place below display panels 74 and Polarizer 722 to provide a uniform light to display panels 74, make its normally show image.

Moreover the employed light conducting plate structure of the utility model more can be finished by assembling mode, is beneficial to the panel of various sizes.As shown in figure 11, this LGP 80 is made up of the light element 82 of a plurality of parallel arranged, each light element 82 lower surface respectively is provided with hologram 84, and all holograms 84 are to be arranged on reflecting plate 86 surfaces, and these light elements 82 and corresponding hologram 84 thereof neatly are arranged on the reflecting plate 86; Two sides of each light element 82 respectively are provided with one first inclination surface and second inclination surface, between every adjacent two these light elements 82 and first inclination surface and second inclination surface that adjoin each other form V-type groove 88 respectively, and be positioned at each accommodation space 40 and be respectively arranged with the luminous light-emittingdiode of a side 90, also can be the cold cathode fluorescent lamp pipe.Wherein, the angular range of the cross section angle of first inclination surface of each light element 321 and second inclination surface is 0＜θ ≦ 60 degree.This embodiment is the LGP that a plurality of light elements are formed, and all the other structures are then identical with previous embodiment, therefore repeats no more.

In sum, the guiding device in conjunction with backlight that the utility model disclosed is to integrate known module backlight and diffusion structure, the lighting area of groove structure design can the increasing light of LGP, improve the light effective utilization, and the utility model need not be traditional diffuser plate, so not only can save material, cost, more can make integral body have thin thickness, with 32 o'clock LCD TVs was example, and light guide plate of the present utility model approximately only needs 6～8mm.Therefore, the utility model not only can provide liquid crystal indicator good briliancy, can make liquid crystal indicator more frivolous again.

Above-described embodiment only is explanation technological thought of the present utility model and characteristics, its purpose makes the personage who has the knack of this skill can understand content of the present utility model and is implementing according to this, can not limit claim of the present utility model with this, promptly the equalization of doing according to the content that the utility model disclosed generally changes or modifies, and must be encompassed in the claim of the present utility model.

Claims

1. an embedded guiding device is characterized in that, comprising:

One reflecting plate;

One LGP, its tool one first surface and a second surface and this first surface are established the V-shaped groove in plural cross section, this first surface position of this LGP makes closed these grooves of this reflecting plate on this reflecting plate, and the cross section angle system of this groove is greater than 0 and smaller or equal to 60 degree; And

At least one light source, position are in each this groove, and the light that this light source sent is by this LGP and past this second surface outgoing of this reflecting plate.

2. according to 1 described embedded guiding device of claim the, it is characterized in that wherein having spacing and extension width between these grooves.

3. according to 1 described embedded guiding device of claim the, it is characterized in that wherein this light source is cold cathode fluorescent lamp pipe or light-emittingdiode.

4. according to 1 described embedded guiding device of claim the, it is characterized in that, comprise that more a diffusion sheet position is on this second surface.

5. according to 1 described embedded guiding device of claim the, it is characterized in that wherein this second surface tool one surface texture evenly spreads out to help light.

6. according to 1 described embedded guiding device of claim the, it is characterized in that wherein this groove system is selected from conical socket or triangle groove.

7. according to 1 described embedded guiding device of claim the, it is characterized in that wherein the material of this LGP system is selected from optical grade acryl, high molecular polymer, macromolecule carbonization thing, glass or quartz.

8. according to 1 described embedded guiding device of claim the, it is characterized in that wherein this first surface is relative with the position of this second surface.

9. according to 1 described embedded guiding device of claim the, it is characterized in that, more comprise four lateral reflection plates four sides respectively at this LGP.

10. according to 1 described embedded guiding device of claim the, it is characterized in that, wherein this LGP more comprises a plurality of light elements arranged side by side and is positioned on this reflecting plate, two sides of each this light element respectively are provided with one first inclination surface and second inclination surface, this first inclination surface between every adjacent two these light elements and this second inclination surface are adjoined each other and form this groove respectively.