A white balance adjustment device and method suitable for dlp projectors

A technology for adjusting devices and projectors, which is applied in the direction of image reproducers, projection devices, instruments, etc. of projection devices, can solve the problems of complicated processes and high requirements on the stability of driving circuits, and achieves short adjustment time, reduced production costs, and reduced production costs. The effect of small loss of brightness

Active Publication Date: 2017-01-11
NANJING WANLIDA TECH
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AI Technical Summary

Problems solved by technology

The process of this kind of adjustment method is relatively complicated, and at the same time, the stability requirements of the driving circuit of the LED light source are relatively high.

Method used

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  • A white balance adjustment device and method suitable for dlp projectors
  • A white balance adjustment device and method suitable for dlp projectors
  • A white balance adjustment device and method suitable for dlp projectors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] See figure 1 As shown, a white balance adjustment device suitable for DLP projectors, including:

[0042] PC 1, used to process the input chromaticity coordinates and illuminance obtained from the red, green and blue images, and calculate and obtain the sequence file of the rotation duty cycle of the red, green and blue lights;

[0043] DLP projector 2, used to project red, green and blue images, and adjust the rotation duty cycle of the red, green and blue lights according to the sequence file;

[0044] The illuminance meter 3 is used to measure the chromaticity coordinates and illuminance of the projected image;

[0045] Among them, the PC 1 is connected with the DLP projector 2, and the PC 1 first controls the DLP projector 2 to project red, green, and blue images in sequence, and at the same time controls the illuminance meter 3 to obtain the corresponding red, green, and blue images. The degree coordinates and illuminance are sent back to PC 1, and then the rotatio...

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Abstract

The invention discloses a white balance adjustment device and method suitable for a DLP projector. A PC is connected with the DLP projector, so that the DLP projector sequentially projects out red, green and blue images. The DLP projector corresponds to an illumination meter, and the illumination meter obtains the red, green and blue images projected out by the projector in real time and measures chromaticity coordinates and illuminations of the red, green and blue images respectively. The PC calculates sequence files of rotation duty ratios of a red lamp, a green lamp and a blue lamp and then leads the sequence files into the DLP projector. The DLP projector sets the rotation duty ratios of the red lamp, the green lamp and the blue lamp according to the sequence files, namely achieves the purpose of changing the light proportion of the red lamp, the green lamp and the blue lamp, and further adjusts colorific white balance. The white balance adjustment device is high in calibration accuracy and low in brightness loss. In addition, the whole operating process is simple and convenient, adjustment time is short, production efficiency is greatly improved, and production cost is reduced.

Description

technical field [0001] The invention relates to a projector white balance adjustment device and method, in particular to a DLP projector white balance adjustment device and method which realizes white balance adjustment by adjusting the rotation duty cycle of red, green and blue lights. Background technique [0002] DLP projector, namely Digital Light Processing (Digital Light Processing) projector, is a kind of projection technology based on DMD chip as an imaging device, which is irradiated on the imaging device by a high-power light source, and projects an image with reflected light. DMD chip, Digital Micromirror Device (Digital Micromirror Device), is a CMOS silicon substrate composed of a microlens array. Each microlens represents a pixel, and the electrical signal drives the microlens to rotate to control the gray value of each pixel. The microlens is driven by the electrical signal to form an image, and then reflects the light source and then projects a picture throug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/14G03B21/20H04N9/31
CPCG03B21/208
Inventor 刘福权黄艺聪杨婷婷曾灯海赖桢文
Owner NANJING WANLIDA TECH
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