CN200997033Y - Light source use efficiency improvement device - Google Patents

Abstract

The backlight module of the utility model is provided with a dimming structure on the light path corresponding to the light source. The dimming structure can be a fully penetrating, fully reflective, or reflective and penetrating optical structure. The light source passes through the dimming structure, which improves the effective use efficiency of light and can more effectively distribute the light of the light source. It can also eliminate the dim bands between the light sources, effectively solving the problem of low overall light source use efficiency and dim and dark bands in conventional backlight modules with more active and positive means.

Description

Light source use efficiency improvement device

technical field

The utility model relates to a device for improving the use efficiency of a light source, in particular to a device for improving the use efficiency of a light source that can improve the use efficiency of an overall light source and effectively solve the obvious problem of dim and dark bands in conventional backlight modules.

Background technique

Liquid crystal displays generally used in information devices can choose to use direct-type or side-light backlight module architectures according to actual design requirements; as shown in Figure 1, it is a schematic diagram of the basic structure of the direct-type backlight module architecture. The structural composition of the overall backlight module is equipped with a reflector 11, several light sources 12, a diffuser plate 13, several optical films 14, and a liquid crystal panel 15 in sequence from the inside to the outside; wherein, each light source 12 can be a straight strip or U Type or other continuously bent lamp tubes are laid between the reflector 11 and the diffuser plate 13 at an appropriate distance; 3 pieces of diffusers, 0-2 pieces of light-enhancing sheets, 0-1 pieces of reflective polarizers, etc. are matched with each other. No light is produced, but a phenomenon of dim and dark bands are formed on the liquid crystal module.

In addition, since the function of the diffusion plate 13 is only to make the passing light diffuse evenly, it has a limited effect on improving the phenomenon of dim and dark bands in the liquid crystal module. Therefore, some backlight modules deliberately lengthen the gap between the light source 12 and the diffusion plate 13, It is expected to expand the range where each light source 12 enters the diffuser plate 13 to achieve the purpose of reducing the dark zone; however, such a structural design not only has a rather limited effect, but also increases the thickness of the backlight module, which is contrary to the original design intention of thinning the liquid crystal module. violated.

Utility model content

The purpose of the present utility model is to provide a light source use efficiency improving device which can improve the use efficiency of the overall light source and effectively solve the obvious dim and dark bands in the conventional backlight module.

Wherein, in the backlight module, a dimming structure is provided on the path of light corresponding to the light source, and the dimming structure can be a completely penetrating, completely reflecting, or reflective and penetrating optical structure so that the light source passes through the dimming structure, Improve the effective use efficiency of light, which can more effectively distribute the light of the light source. And it can eliminate the dark bands between the light sources, and effectively solve the problems of low efficiency of the overall light source and the appearance of dim and dark bands in conventional backlight modules with more active and active means.

The beneficial effect of the utility model is: the utility model light source utilization efficiency improvement device is aimed at improving the structure of the liquid crystal display to uniformly irradiate the light generated by the light source towards the liquid crystal panel, and the basic composition structure of the liquid crystal display is also passed through The optical film and the liquid crystal panel present the light source performance effect of the luminous body.

Description of drawings

FIG. 1 is a schematic structural diagram of a conventional backlight module;

Fig. 2 is the structure diagram of the first embodiment of the backlight module in the utility model;

3A and B are structural perspective views of the second embodiment of the backlight module in the present invention;

FIG. 4 is a schematic diagram of light traveling in the third embodiment of the backlight module in the present invention;

FIG. 5 is a schematic diagram of light traveling in the fourth embodiment of the backlight module of the present invention;

6A and B are structural schematic diagrams of the fifth embodiment of the backlight module in the present invention;

7A and B are structural schematic diagrams of the sixth embodiment of the backlight module in the present invention;

Fig. 8 is a structural schematic diagram of the seventh embodiment of the backlight module in the present invention;

FIG. 9 is a schematic structural diagram of the eighth embodiment of the backlight module in the present invention;

FIG. 10 is a schematic structural diagram of the ninth embodiment of the backlight module of the present invention.

【Description of figure number】

11 reflector 12 light source

13 diffuser plate 14 optical diaphragm

15 LCD panel 21 Light source

22 Reflector 23 Reflector

24 light guide plate 241 light output side

242 Side 3 Dimming structure

31 Optical structure 311 Optical structure

312 Optical structures 313 Optical structures

33 Dimming area 4 Optical film

Detailed ways

According to the utility model for improving the use efficiency of light sources, the backlight module is provided with a dimming structure corresponding to the path of the light rays of the light source. Transparent, fully reflective or reflective and penetrating optical structures, as shown in the first embodiment of Figure 2, the dimming structure 3 is arranged above the light source 21 to form a direct-lit backlight module, and the light source can be a light emitting diode Or a light tube, the dimming structure 3 can be in the form of a single optical structure and cover the top of each light source 21, or in the second embodiment shown in Figure 3A, the dimming structure 3 includes a number of corresponding light sources 21 The number of optical structures 31, as shown in the figure, each optical structure 31 can be arranged above each light source 21, also can be arranged between each light source, of course each optical structure 31 can also be divided into multiple layers, and can overlap or interlaced form, and can also be fully transparent, fully reflective, or reflective and transparent optical structures that can be matched with each other, as shown in Figure 3B, can be respectively arranged above each light source 21, and arranged between each light source 21 , and each light source 21 is also arranged in a reflector 22, and a reflection sheet 23 is arranged under each light source 21. The optical structure 31 can be in the form of complete penetration, complete reflection or reflective and penetrative, wherein the complete The penetrating optical structure can be a transparent sheet, while the reflective and penetrating optical structure contains a processed transparent sheet or composite material, and its processing can be sandblasting, etching, atomization, setting dots or setting The composite materials of polymer materials can also be processed to control the reflectivity and transmittance, and the ratio of reflectivity and transmittance can be adjusted according to the user's needs.

The light travel path of each light source 21 can be shown in the third embodiment of FIG. %, so after the light emitted by each light source 21 passes through the optical structure 311, 50% of the light passes through and emits upward, and 50% of the light is reflected to the reflection sheet 23 below the light source 21 and then emitted upward, so as to average The luminance of each light source 21 and between each light source 21 can improve the effective use efficiency of light, distribute the light of the light source more effectively, and effectively eliminate the dark zone between each light source.

As shown in Figure 5, it is the fourth embodiment of the present utility model, and it is provided with the optical structure body 312 that can fully reflect respectively above each light source 21, so the light that each light source 21 emits upwards after passing through the optical structure body 312, all The light is reflected to the reflective sheet 23 below the light source 21 and then emitted upward, so as to average the luminance between each light source 21 and each light source 21, improve the repeated and effective use efficiency of light, and effectively eliminate the dark zone between each light source .

As shown in FIG. 6A , it is the fifth embodiment of the present utility model, which is provided with a fully transparent optical structure 313 above each light source 21, and other optical films 4 can be supported on the optical structure 313. (such as a diffusion sheet or a prism sheet), not only can carry and support the optical film 4, but can further protect the light source 21 below and the optical film 4 above; The optical structure 31 , as shown in FIG. 6B , the optical structure 31 may be disposed above the corresponding light sources 21 .

In addition to the arrangement of the dimming structure as shown in Figure 2 and Figure 3, the sixth embodiment shown in Figure 7A and B, the dimming structure 3 is mainly composed of one or more transparent sheets 32 or composite materials. There are completely penetrating, fully reflective or reflective and penetrative dimming areas 33 formed on the surface, or completely penetrating, fully reflective or reflective and penetrating dimming areas are matched with each other, and the dimming areas 33 can be processed And formed above each light source 21 , or formed between each light source 21 .

As shown in Figure 8, it is the seventh embodiment of the present utility model, the dimming structure is arranged on the side of the light source, and the dimming structure 3 of the formed side-light backlight module can be in the form of a single optical structure 31 and set On the side of each light source 21 , in the embodiment shown in the figure, the light source 21 forms two-way incident light from both sides of the light guide plate 24 , and the optical structure 31 is disposed on the light output side 241 of the light guide plate 24 .

Or in the eighth embodiment shown in Figure 9, the dimming structure includes a number of optical structures 31 corresponding to the number of light sources 21, the light source 21 is formed by one side of the light guide plate 24 to enter light, and the optical structures 31 are set On the side 242 of the light guide plate 24; of course, the dimming structure can also be formed on one or more transparent sheets or composite materials through processing to form a dimming area that is completely penetrating, fully reflective, or reflective and penetrating , the dimming area can be formed on the side corresponding to each light source, or formed on the side corresponding to each light source.

Moreover, as shown in the ninth embodiment of FIG. 10, the optical structure 31 can also be arranged on the light-emitting side 241 and the side edge 242 of the light guide plate 24 at the same time; as shown in FIGS. The optical structure is applied to the side-lit backlight module, and is arranged on the light path of the light source. The dimming structure 3 can be a fully penetrating, fully reflective, or reflective and penetrating optical structure. The luminance between each light source can effectively eliminate the dark zone between each light source, and can also reduce the number of light sources used, and reduce the cost of optical films (such as diffusers, enhancement films or reflective polarizers) in the backlight module. Use, and can more effectively distribute the light of the light source, thereby improving the repeated and effective use efficiency of light.

As mentioned above, the utility model provides a better and feasible light source utilization efficiency improvement device for the backlight module, and an application for a utility model patent is submitted according to law; however, the above implementation description and drawings are the preferred implementation of the utility model For example, it is not intended to limit the present utility model, therefore, all those similar to and identical to the structure, device, and features of the present utility model should belong to the creation purpose of the present utility model and within the scope of the patent application.

Claims (11)

1, a kind of light source service efficiency lifting gear is characterized in that, this light travel path that corresponds to light source is provided with light modulation structure, and its light modulation structure is for penetrating, reflect fully the optical structure that maybe can reflect and penetrate fully.

2, light source service efficiency lifting gear according to claim 1 is characterized in that this light modulation structure comprises the optical structure of some corresponding quantity of light source.

3, light source service efficiency lifting gear according to claim 1 is characterized in that, this optical structure that penetrates fully top is provided with blooming piece or optical structure.

4, light source service efficiency lifting gear according to claim 1 is characterized in that this optical structure that penetrates fully is a slide.

5, light source service efficiency lifting gear according to claim 1 is characterized in that, this optical structure that can reflect and penetrate includes slide or the compound substance of handling once processing.

6, light source service efficiency lifting gear according to claim 1 is characterized in that, this light modulation structure penetrates by being formed with fully on one or above slide or the compound substance, the reflection light modulation zone that maybe can reflect and penetrate fully.

7, light source service efficiency lifting gear according to claim 1 is characterized in that this light modulation structure is located at direct type backlight module or side light type back light module.

8, light source service efficiency lifting gear according to claim 1 is characterized in that this light modulation structure is located in the side light type back light module, and this light source is located at a side or the dual side-edge of light guide plate.

9, as light source service efficiency lifting gear as described in the claim 8, it is characterized in that this light modulation structure is the form of single optical structure body and the bright dipping side of being located at light guide plate.

10, as light source service efficiency lifting gear as described in the claim 8, it is characterized in that this light modulation structure comprises the optical structure of some corresponding quantity of light source, and each optical structure is arranged at the side of light guide plate.

11, as light source service efficiency lifting gear as described in the claim 8, it is characterized in that, this light modulation structure is the form of single optical structure body and the bright dipping side of being located at light guide plate, and this light modulation structure also comprises the optical structure of some corresponding quantity of light source, and each optical structure is arranged at the side of light guide plate.

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