CN102141216A

CN102141216A - Laser backlight source for display of liquid crystal display panel

Info

Publication number: CN102141216A
Application number: CN2010101042198A
Authority: CN
Inventors: 蔡振家
Original assignee: SA Zhenjia; ZHENJIA SA
Current assignee: SA Zhenjia; ZHENJIA SA
Priority date: 2010-02-02
Filing date: 2010-02-02
Publication date: 2011-08-03

Abstract

The invention relates to a laser backlight source for the display of a liquid crystal display panel, which consists of a laser light source and a light guide pipe or a light guide plate. Three-primary-color laser, namely red light (R) with the wavelength of 635nm, green light (G) with the wavelength of 532nm and blue light (B) with the wavelength of 465nm which are emitted by a red/green/blue laser diode are output through an X prism after being subjected to beam expansion, shimming, decoherence and the like respectively and then are led onto the back surface of the liquid crystal display panel through the light guide pipe or the light guide plate. R/G/B three-primary-color light of the laser light source is driven by an R/G/B field signal corresponding to a television signal at a high speed respectively to display field orders. A display which uses high-degree-of-saturation high-spectral-brightness red/green/blue (R/G/B) three-primary-color laser as the backlight source of the liquid crystal display panel has the properties such as energy saving, environmental friendliness, color gamut representation space, color accuracy, brightness and the like which are far higher than those of the conventional display.

Description

A kind of liquid crystal display shows uses laser backlight

Technical field

The present invention relates to a kind of demonstration backlight, particularly a kind of liquid crystal display shows uses backlight, belongs to the laser display field.

Background technology

The flat panel TV TFT-LCD LCD TV of Xiao Shouing accounts for 75-80% in the market, has become the main flow in market, estimates in 5-7 from now on the still main flow in market.And the developing direction of television set is energy-saving and environmental protection, high image quality, and this had both met national energy-saving and environmental protection policy also is further to satisfy users to the TV demand.Because liquid crystal (LCD) itself is not luminous, leading indicators such as the brightness of LCD TV, contrast, color, energy-saving and environmental protection all depend on liquid crystal display backlight behind, so make the TFT-LCD LCD TV realize energy-saving and environmental protection, high image quality, backlight is crucial.

That traditional liquid crystal display is adopted is cold cathode fluorescent tube backlight (CCFL), but its energy consumption is big, the life-span is short relatively; Colour gamut is little, can only reach 72% of NTSC gamut standards; Owing to contain mercury in the fluorescent tube, so its not environmental protection.Light emitting diode (LED) backlight development at present is very fast, and it will substitute CCFL, and LED has the colour gamut of broad than CCFL, and the life-span is long, environmental protection, but it stablize not enough, brightness is not high, energy-conservation also limited, and LASER Light Source all is better than LED and CCFL in every respect.

Summary of the invention

The objective of the invention is to overcome the shortcoming of prior art, adopt LASER Light Source to show and use backlight, so that LCD TV is realized energy-saving and environmental protection, high image quality as liquid crystal display.

The present invention is achieved in that a kind of liquid crystal display shows the backlight of usefulness, is made up of LASER Light Source and light pipe or LGP two parts.That LASER Light Source adopts respectively is red/and red (R) wavelength that green/blue laser diode sends is that 635nm/ green (G) wavelength is that 532nm/ indigo plant (B) wavelength is the 465nm tricolor laser, the R/G/B tricolor laser is handled the back by the output of X prism through expanding bundle, shimming, eliminating coherence etc. respectively, the R/G/B light of output and through the light pipe or the LGP introducing liquid crystal display back side.Light pipe can be made various difformity combinations and be complementary to satisfy the needs of different size liquid crystal display structure layout with liquid crystal display.Can adopt the combination of a plurality of identical LASER Light Sources and light pipe or LGP to satisfy the needs of different size liquid crystal display brightness.The R/G/B three primary colours light of LASER Light Source is driven with the high speed sequential by the R/G/B field signal of TV signal correspondence respectively, realizes that a preface shows.

The beneficial effect that the present invention compared with prior art has is: red/green/blue (R/G/B) tricolor laser by using high saturation, high spectral luminance factor will be better than existing display as the display of liquid crystal screen backlight far away on performances such as energy-saving and environmental protection, colour gamut expressive space, color fidelity, brightness.

Description of drawings

Fig. 1 is the theory diagram of LASER Light Source light output of the present invention;

Fig. 2 (a/b/c) is the LASER Light Source and the light pipe combination schematic diagram of backlight of the present invention;

Fig. 3 is the LASER Light Source and the LGP combination schematic diagram of backlight of the present invention.

Wherein: 1. LASER Light Source; 2. liquid crystal display; 3. light pipe; 4. LGP.

The specific embodiment

The invention will be further described below in conjunction with drawings and Examples.

As Fig. 1, Fig. 2, shown in Figure 3: red/green/blue laser diode sends red (R)/green (G)/indigo plant (B) tricolor laser, and the R/G/B tricolor laser is handled the back and exported by the X prism through expanding bundle, shimming, eliminating coherence etc. respectively.Wherein: the wavelength of red laser diode is 635nm; The wavelength of green laser diode is 532nm; The wavelength of blue laser diode is 465nm.The R/G/B light of LASER Light Source 1 output is also introduced liquid crystal displays 2 back sides through light pipe 3 or LGP 4.Light pipe 3 can be made various difformity combinations and be complementary to satisfy the needs of different size liquid crystal display 2 structure layouts with liquid crystal display 2.Can adopt a plurality of identical LASER Light Sources 1 and light pipe 3 or LGP 4 combinations to satisfy the needs of different size liquid crystal display 2 brightness.The R/G/B three primary colours light of LASER Light Source 1 is driven with the high speed sequential by the R/G/B field signal of TV signal correspondence respectively, realizes that a preface shows.

Claims

1. a liquid crystal display shows the backlight of usefulness, it is characterized in that described backlight is made up of LASER Light Source (1) and light pipe (3) or LGP (4) two parts.

2. liquid crystal display according to claim 1 shows the backlight of usefulness, to it is characterized in that described LASER Light Source (1) adopts respectively red/and red (R) wavelength that green/blue laser diode sends is that 635nm/ green (G) wavelength is that 532nm/ indigo plant (B) wavelength is the 465nm tricolor laser, the R/G/B tricolor laser is handled the back by the output of X prism through expanding bundle, shimming, eliminating coherence etc. respectively, the R/G/B light of output and through the light pipe (3) or LGP (4) introducing liquid crystal display (2) back side.

3. liquid crystal display according to claim 1 shows the backlight of usefulness, it is characterized in that described light pipe (3) can make various difformities combinations and be complementary to satisfy the needs of different size liquid crystal display (2) structure layout with liquid crystal display (2).

4. liquid crystal display according to claim 1 shows the backlight of usefulness, it is characterized in that adopting the combination of a plurality of identical LASER Light Sources (1) and light pipe (3) or LGP (4) to satisfy the needs of different size liquid crystal display (2) brightness.

5. liquid crystal display according to claim 1 shows the backlight of usefulness, it is characterized in that the R/G/B three primary colours light of described LASER Light Source (1) is driven with the high speed sequential by the R/G/B field signal of TV signal correspondence respectively, realizes that a preface shows.