CN103453398A - Backlight source module - Google Patents

Abstract

The invention discloses a backlight source module, which comprises light sources and a light guide component, wherein the light guide component comprises a light guide plate; light output by the light sources is input into the light guide plate; the light sources comprise one or more laser light sources. According to the backlight source module, the laser light sources are used as backlight sources or a part of the light sources, so that the color saturation of a liquid crystal display is effectively improved, and the picture quality of the liquid crystal display is improved; in addition, laser is guided into the light guide component through optical fibers, so that the radiation problems of lasers are solved, and the edge width of the liquid crystal display can be optimized.

Description

A kind of backlight module

Technical field

The present invention relates to lcd technology, particularly a kind of backlight module.

Background technology

Along with the development of Display Technique, liquid crystal display (Liquid Crystal Display is called for short LCD) is compact based on it, significantly saves the advantages such as placing space, becomes the display of main flow.Because LCD panel itself is not luminous, must on the LCD panel, add that a light emitting source just can make LCD carry out the image demonstration, so backlight is absolutely necessary for LCD.In general, according to the difference of backlight distributing position, backlight can be divided into side-light type back light and direct-light-type backlight, and side-light type back light is placed in the side of LCD display, and direct-light-type backlight is positioned at the below of LCD display.

The backlight of circulation has light emitting diode (LED) backlight and cold-cathode tube (CCFL) backlight on the market at present.The CCFL light source is more assorted, and colourity is impure, etc. shortcoming, by LED light source, is substituted gradually.LED light source has energy-conservation, and colourity is purer, the advantages such as environmental protection, but LED luminous be that the fluorescent material spectrum chroma is arranged.

In order to improve the color saturation of liquid crystal, we need to find light source that excitation is higher to improve the color saturation of current liquid crystal display.

Summary of the invention

The technical problem to be solved in the present invention is exactly the defect that overcomes prior art, proposes a kind of backlight module, to improve the color saturation of current liquid crystal display.

In order to address the above problem, the invention provides a kind of backlight module, comprising: light source and leaded light component, described leaded light component comprises LGP, the light of described light source output inputs in described LGP; Described light source comprises one or more LASER Light Sources.

Preferably, when described light source comprises a plurality of LASER Light Source, described a plurality of LASER Light Sources are exported the laser of identical or different color.

Preferably, described light source also comprises one or more LED light sources.

Preferably, described LASER Light Source comprises connected successively laser instrument, fiber coupler and optical fiber, and the laser of laser instrument output enters optical fiber through fiber coupler, from the bright dipping end of optical fiber, inputs to described LGP.

Preferably, the bright dipping end of described optical fiber is provided with lens.

Preferably, described LASER Light Source also comprises the laser coupled chamber, and the light inputting end of described laser instrument, fiber coupler and optical fiber is arranged in described laser coupled chamber.

Preferably, described LASER Light Source comprises one or more laser instruments; When described LASER Light Source comprises a plurality of laser instrument, described a plurality of laser instruments are exported the laser of identical or different color.

Preferably, described optical fiber is the point-like emitting optical fiber.

Preferably, described leaded light component also comprises reflector plate, prismatic lens and diffuser plate, and wherein, described reflector plate is positioned at described LGP one side, and described prismatic lens and diffuser plate are positioned at the opposite side of described LGP.

The present invention compares with the common LED backlight module, has following superiority:

1, laser instrument, as back light or part light source, has improved the color saturation of liquid crystal display effectively, has improved the picture quality of liquid crystal display;

2, laser instrument has improved the color saturation of liquid crystal display, but the laser instrument heat radiation is not fine solution, and the solution of heat radiation is by optical fiber, photoconduction to be arrived to the place needed, and has so effectively reduced the border width of liquid crystal display;

3, adopt laser instrument and optical fiber as optical system, effectively raise the optics utilization ratio.

The accompanying drawing explanation

The top view structure of the backlight module that Fig. 1 is the embodiment of the present invention (side-light type);

The light path schematic diagram of the LASER Light Source of the backlight module that Fig. 2 is the embodiment of the present invention.

The specific embodiment

Hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that do not conflict, the embodiment in the application and the feature in embodiment be any combination mutually.

For color saturation and the picture quality that improves liquid crystal display, in the present invention, improved light source backlight, with some or all of laser as back light.

The present invention is a kind of backlight that is applied to liquid crystal display, and liquid crystal display is comprised of liquid crystal panel and backlight module, and backlight module provides the optical light source of enough brightness and high uniformity for liquid crystal panel, guarantees the display quality of liquid crystal display.

As shown in Figure 1, the backlight module of the embodiment of the present invention comprises: light source and leaded light component, and wherein, leaded light component comprises LGP, also comprises reflector plate, prismatic lens and diffuser plate; Described reflector plate is positioned at described LGP one side, and described prismatic lens and diffuser plate are positioned at the opposite side of described LGP.The light of light source output inputs in described LGP.

In the present invention, light source comprises one or more LASER Light Sources.When comprising a plurality of LASER Light Source, the laser of the exportable identical or different color of described a plurality of LASER Light Sources.This light source can comprise one or more LED light sources, also can not comprise LED light source.Generally, light source is three, wherein comprises at least one LASER Light Source.

As shown in Figure 2, LASER Light Source comprises connected successively laser instrument, fiber coupler and optical fiber, and the laser of laser instrument output enters optical fiber through fiber coupler, from the bright dipping end of optical fiber, enters described LGP.

In addition, in order to improve the utilization ratio of laser, LASER Light Source also comprises the laser coupled chamber, and the light inputting end of described laser instrument, fiber coupler and optical fiber is arranged in described laser coupled chamber.

Each LASER Light Source comprises one or more laser instruments; When described LASER Light Source comprises a plurality of laser instrument, described a plurality of laser instruments are exported the laser of identical or different color.

Laser instrument can be by blue laser, green laser, red laser, or the white light laser through mixing.

According to the colour mixture scheme, LED and laser instrument can exist simultaneously or part exists, as light source, that is: LED can be used as a kind of of trichromatic a kind of or tertiary colour, laser instrument is as trichromatic a kind of or tertiary colour is a kind of, be finally according to trichromatic colour mixture scheme, be mixed into the color lump needed.

Optical fiber can be the point-like emitting optical fiber, and the bright dipping end of optical fiber can be provided with optical lens.

Below with concrete application example, further illustrate the present invention:

Application example one

The mixed light scheme of green light LED light source and red laser light source.Two green light LED and a red laser are respectively as three light sources, and wherein, green light LED is made by blue chip and green emitting phosphor.The laser that red laser sends, by fiber coupler, enters optical fiber, is directed into LGP.This optical fiber is the point-like emitting optical fiber, at optical fiber head, is provided with lens.

Application example two

The blue led light source, the mixed light scheme of green laser light source and red laser light source.The LED blue light is to be made by blue chip and transparent colloid.The laser that green laser and red laser send, by fiber coupler, enters optical fiber, is directed into LGP, and this optical fiber is the point-like emitting optical fiber, at optical fiber head, is provided with lens.

Application example three

Blue laser light source, green laser light source and red laser light source colour mixture scheme.Adopt the laser instrument Output of laser of three kinds of colors.Wherein, the laser instrument of every kind of color can be one or more.Blue laser, the laser that green laser and red laser send, by fiber coupler, enters optical fiber, is directed into LGP, and this optical fiber is the point-like emitting optical fiber, at optical fiber head, is provided with lens.

Application example four

Pass through again the optical fiber import plan after the first mixed white light of laser.Laser instrument elder generation mixed light in laser cavity goes out white light, according to the rule of RGB mixed light, reaches client's light mixing color block.The laser that three white light LASER Light Sources send, by fiber coupler, enters optical fiber, is directed into LGP, and this optical fiber is the point-like emitting optical fiber, at optical fiber head, is provided with lens.

In sum, the present invention adopts laser instrument as back light or part light source, has improved the color saturation of liquid crystal display; In addition, adopt the carrier of optical fiber as leaded light, effectively solved the laser instrument heat radiation and improved the narrow frame problem of liquid crystal display.The present invention can be widely used in field of liquid crystal display, such as LCD TV, liquid crystal display, notebook computer, mobile phone and flat lamp etc.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (9)

1. a backlight module comprises: light source and leaded light component, and described leaded light component comprises LGP, the light of described light source output inputs in described LGP; It is characterized in that, described light source comprises one or more LASER Light Sources.

2. backlight module as claimed in claim 1, is characterized in that,

When described light source comprises a plurality of LASER Light Source, described a plurality of LASER Light Sources are exported the laser of identical or different color.

3. backlight module as claimed in claim 1, is characterized in that,

Described light source also comprises one or more LED light sources.

4. as backlight module as described in any one in claim 1～3, it is characterized in that,

Described LASER Light Source comprises connected successively laser instrument, fiber coupler and optical fiber, and the laser of laser instrument output enters optical fiber through fiber coupler, from the bright dipping end of optical fiber, inputs to described LGP.

5. backlight module as claimed in claim 4, is characterized in that,

The bright dipping end of described optical fiber is provided with lens.

6. backlight module as claimed in claim 4, is characterized in that,

Described LASER Light Source also comprises the laser coupled chamber, and the light inputting end of described laser instrument, fiber coupler and optical fiber is arranged in described laser coupled chamber.

7. backlight module as claimed in claim 4, is characterized in that,

Described LASER Light Source comprises one or more laser instruments; When described LASER Light Source comprises a plurality of laser instrument, described a plurality of laser instruments are exported the laser of identical or different color.

8. backlight module as claimed in claim 4, is characterized in that,

Described optical fiber is the point-like emitting optical fiber.

9. as backlight module as described in any one in claim 1～3, it is characterized in that,

Described leaded light component also comprises reflector plate, prismatic lens and diffuser plate, and wherein, described reflector plate is positioned at described LGP one side, and described prismatic lens and diffuser plate are positioned at the opposite side of described LGP.

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