Light source device

A light source device, light source technology, applied in the direction of light source, electric light source, lighting device, etc., can solve the problems of color drift, high cost, high color rendering index, and achieve the effect of simplifying optical design and easy heat dissipation

Inactive Publication Date: 2008-11-19
BEX TECH JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

White light can also be obtained by exciting blue, green, and red phosphors with ultraviolet or blue-violet LEDs. This device also packages LED chips and phosphors together to form an independent unit device. This white light has a relatively high color rendering index, but the efficiency is low.
Another method is to combine red, green and blue (RGB) LED cores with three different luminous colors to obtain white light. The advantage is good color rendering, but the disadvantage is that different colors of LEDs have inconsistent attenuation and color drift. And low luminous efficiency, high cost

Method used

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Experimental program
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Effect test

Embodiment 1

[0070] The light source device in this embodiment can adopt figure 1 Or any structure shown in 2, a blue CCFL or LED light source 310 is used, and a photoluminescent film 316 is provided.

[0071] The green luminescent material is selected as coumarin (C6) or dimethylquinacridine (dimethyquinacrodone) (MDQD) series derivatives, or a mixture of two or more luminescent materials, and the film-forming material is acrylic acid or polycarbonate Resin-like. The weight ratio of coumarin (C6) to acrylic resin (solid content) is 0.1-30%.

[0072] The red luminescent material is selected as DCM2 (4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran) or DPP (diphenylpentacence), and green luminescent material such as coumarin (C6) can also be added Or dimethylquinacridine (dimethylquinacrodone) (MDQD) series derivatives, yellow light-emitting materials, etc. to improve the blue-red light conversion efficiency. The film-forming material is acrylic or polycarbonate resin. T...

Embodiment 2

[0076] The light source device in this embodiment can adopt figure 1 Or any of the structures shown in 2, a blue CCFL or LED light source 310 is used, and a photoluminescence film 316 is provided.

[0077] For the preparation of green polymer luminescent materials, P-PPV, PF8T or their derivatives, or a mixture of two or more luminescent materials are selected, and the film-forming material is acrylic or polycarbonate resin. The weight ratio of resin (solid content) is 1-99%.

[0078] The red polymer luminescent material is selected from MEH or CN-PPV, or PFT (copolyfluorene of polythiophene and polyfluorene) and its derivatives, and yellow luminescent materials such as PPV can also be used to improve the conversion efficiency of blue light to red light. The film-forming material is acrylic or polycarbonate resin. The weight ratio of luminescent material to resin (solid content) is 1-99%.

Embodiment 3

[0080] The device structure of this embodiment is as figure 1 Or 2, and principle is identical with embodiment one, two, difference is:

[0081] To prepare the green luminescent material, choose ZnS / Cu or SrGa2O4 / Eu inorganic luminescent material, or a mixture of two or more luminescent materials, and the weight ratio is 1-99% (to the solid content of the acrylic resin).

[0082] The red luminescent material is prepared from Y2O2S / Eu or SrS / Eu inorganic luminescent material, or a mixture of two or more luminescent materials, and the weight ratio is 1-99% (to the resin solid content).

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PUM

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Abstract

The invention discloses a light source device, comprising a luminescent device, a reflected light part, a light guide part, a diffusion part, photoluminescence parts and a fixed mechanism and so on. The luminescent device is arranged on one side of a reflector panel, the wavelength range of light emitted by the luminescent device is between 350 and 560 nm, the front of the luminescent device is provided with one or more than one photoluminescence part; red, green, blue, an intermediate color between the green and red and the intermediate color between the green and the blue are emitted by the photoluminescence parts under optical excitation of the luminescent device to be synthetized to white light. The light source of the photoluminescence parts adopts the luminescent device with monocolor or multicolor to obtain white light source having different color temperature and color-rendering indexes. Because the luminescent device with monocolor is configured and the electro-optical property is basically identical, thereby simplifying an electric control system and also avoiding the influence on illumination property due to different aging progresses generated by using the luminescent device with different colors.

Description

technical field [0001] The invention relates to a light source device for display and illumination and a manufacturing method. Background technique [0002] A common planar light source device includes optical and fixing mechanisms such as light-emitting devices, reflectors, light guide plates, diffusion plates, and light-concentrating films. The light emitting device adopts cold cathode fluorescent lamp (CCFL) or hot cathode fluorescent lamp (HCFL), electrodeless fluorescent lamp, organic light emitting diode, inorganic light emitting diode (LED), electroluminescent device, field emission device, etc. [0003] Common white LEDs are obtained by exciting yellow phosphors with blue LEDs. The device is usually packaged together with blue LED chips and yellow phosphor powder to form an independent unit device. White light obtained by exciting yellow phosphors with blue LEDs is also called pseudo-white light, which has high efficiency but low color rendering index. White light...

Claims

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Application Information

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IPC IPC(8): F21S2/00F21V9/10F21V13/00F21Y101/02F21Y105/00F21K9/20F21V9/40F21Y115/10
Inventor 孙润光
Owner BEX TECH JIANGSU
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