CN104597697B - Novel laser projector color wheel and color temperature matching method - Google Patents

Abstract

The invention relates to a novel laser projector color wheel and color temperature matching method. The method comprises the following steps of determining the corresponding angle and the corresponding output luminance of the fluorescent wheel of a laser light source; selecting green wave bands and red wave bands; selecting the angles of red pieces from yellow pieces, and ensuring R/W>=14%; according to CIE1931 (Commission Internationale Ed I'eclairage) chromaticity coordinates and the tristimulus-value X.Y.Z conversion formula, computing white coordinates; according to the CIE1931 chromaticity coordinates and the color temperature conversion formula, computing color temperature and enabling the color temperature to meet 6000-7000 K. The novel laser projector color wheel and color temperature matching method achieves high color wheel efficiency and good color display effects.

Description

A new color wheel and color temperature matching method for laser projectors

technical field

The invention relates to a color wheel and color temperature matching method of a projector, in particular to a laser projector color wheel and color temperature matching method.

Background technique

At present, the light source of most projectors is mercury lamp light source. The output of mercury lamp is continuous, and the color wheel is used for color separation. At a certain moment, only the spectral band corresponding to the color wheel will pass through, and the rest of the band All the energy is lost, and the efficiency will be very low, basically around 40%. A small number of projectors use laser light sources as the light source. For laser light sources, its output is segmented through the fluorescent wheel, which is discontinuous light. There is only one color output at a certain time, and the corresponding color wheel also needs to match the same color. , or other colors can be separated from this color, but there are problems such as unsatisfactory display effects.

Contents of the invention

Purpose of the invention: The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for matching the color wheel and color temperature of a new type of laser projector with high efficiency of the color wheel and good color display effect.

Technical solution: In order to solve the above technical problems, a novel laser projector color wheel and color temperature matching method according to the present invention comprises the following steps,

(1) First determine the angle corresponding to the fluorescent wheel of the laser light source and the brightness corresponding to the output, G-angle 114/brightness 2240, Y-angle 190/brightness 3763, B-angle 56/brightness 97;

(2) Select the wavelength band between 490-574nm from the wavelength band of 400-800nm, and its light efficiency is 73.97%;

(3) Select a wavelength band between 590-700nm from the 400-800nm band, and its light efficiency is 32.89%;

(4) Select the angle of the red film from the yellow film to ensure that R/W≥14%;

(5) Calculate the white color coordinates according to the conversion formula of CIE1931 chromaticity coordinates and tristimulus value X.Y.Z;

(6) The color temperature is calculated according to the conversion formula of CIE1931 chromaticity coordinates and color temperature, which satisfies 6500±500K.

The waveband between 490-574nm in the step (2) is the green waveband.

The waveband between 590-700nm in the step (3) is the red waveband.

The waveband between 590-700nm in the step (3) is the red waveband selected from the yellow waveband.

The design specifications of the color wheel should meet the following requirements

Taking a laser light source as an example, the basic parameters are as follows:

The angle parameters of the fluorescent wheel are Y190 degrees, G114 degrees, B56 degrees,

The output characteristics are as follows

color Brightness (lumens) x the y White 6100 0.31 0.38 green 2240 0.335 0.592 blue 97 0.158 0.018 yellow 3763 0.425 0.548

First, the red light is separated from the yellow light, and cut off as red light from 590nm onwards. From the data of the laser light source spectrograph, it can be concluded that the energy after 590nm accounts for the proportion of the entire yellow light energy Rratio=32.2%,

The green spectrum needs to be selected from 490-574, then the ratio of the green spectrum is Gratio=74%.

After adding the second color wheel, the color wheel parameter becomes R112G114B56Y78,

At this time, after the light source passes through the color wheel, the output characteristic parameter is

color Segment Size x the y L R 93 0.64 0.35 606 G 114 0.3 0.63 1660 B 56 0.158 0.018 97

Y 97 0.425 0.548 1921 C2 0 0 0 0 W 360 0.319731051 0.323059563 4284

R/w=14.15%, G/w=38.7%, B/w=2.27%, the color temperature values are basically close.

At this time, the parameter specification of the color wheel is

color Segment Size T50%(nm) R 93 590 G 114 490,574 B 56 490 Y 97 420

Beneficial effects: Compared with the prior art, the present invention has the remarkable advantage that the present invention makes the color wheel more efficient and the color display effect better through the adjustment of the color wheel and color temperature.

detailed description

The present invention will be further described below in conjunction with embodiment.

A novel laser projector color wheel and color temperature matching method according to the present invention comprises the following steps,

(1) First determine the angle corresponding to the fluorescent wheel of the laser light source and the brightness corresponding to the output, G-angle 114/brightness 2240, Y-angle 190/brightness 3763, B-angle 56/brightness 97;

(2) Select the wavelength band between 490-574nm from the wavelength band of 400-800nm, and its light efficiency is 73.97%;

(3) Select a wavelength band between 590-700nm from the 400-800nm band, and its light efficiency is 32.89%;

(4) Select the angle of the red film from the yellow film to ensure that R/W≥14%;

(5) Calculate the white color coordinates according to the conversion formula of CIE1931 chromaticity coordinates and tristimulus value X.Y.Z;

(6) The color temperature is calculated according to the conversion formula of CIE1931 chromaticity coordinates and color temperature, which satisfies 6500±500K.

The waveband between 490-574nm in the step (2) is the green waveband.

The waveband between 590-700nm in the step (3) is the red waveband.

The waveband between 590-700nm in the step (3) is the red waveband selected from the yellow waveband.

The invention makes the efficiency of the color wheel high and the color display effect good through the adjustment of the color wheel and the color temperature.

The present invention provides an inventive concept and a product manufacturing method. There are many methods and approaches for realizing the technical solution. The above description is only a preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, Under the premise of not departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention, and each component that is not specified in this embodiment can be realized by existing technologies .

Claims (4)

1. a kind of new pattern laser color wheel of projecting camera and colour temperature matching process it is characterised in that：It comprises the following steps,

(1) determine the corresponding angle of LASER Light Source fluorescent wheel first and export corresponding brightness, 114 degree/brightness of G- angle 2240 Lumen, 190 degree/brightness of Y- angle 3763 lumen, 56 degree/brightness of B- angle 97 lumen；

(2) choose wave band between 490-574nm for the wavelength from the wave band of 400-800nm, its light efficiency is 73.97%；

(3) choose wave band between 590-700nm for the wavelength from the wave band of 400-800nm, its light efficiency is 32.89%；

(4) choose the angle of red tab from erotic film it is ensured that R/W >=14%；

(5) white chromaticity coordinates is calculated according to the conversion formula of CIE1931 chromaticity coordinate and tristimulus values X.Y.Z；

(6) colour temperature is calculated according to the conversion formula of CIE1931 chromaticity coordinate and colour temperature, meet 6500 ± 500K.

2. new pattern laser color wheel of projecting camera according to claim 1 and colour temperature matching process it is characterised in that：Described step (2) in, the wave band between 490-574nm is green band.

3. new pattern laser color wheel of projecting camera according to claim 1 and colour temperature matching process it is characterised in that：Described step (3) in, the wave band between 590-700nm is red band.

4. new pattern laser color wheel of projecting camera according to claim 1 and colour temperature matching process it is characterised in that：Described step (3) in, the wave band between 590-700nm is the red band chosen from yellow band.