Method and system for automatically correcting color wheel of projecting camera

Abstract

The invention relates to a method and a system for automatically correcting color wheel of a projecting camera. In the method for automatically correcting the color wheel of the projecting camera, the color wheel comprises three essential colors and at least one non-essential color; the method comprises the following steps: (A) making the projecting camera project the non-essential colors of the color wheel, and measuring first optical physical quantities Xr, Yr and Zr of the projecting camera; (B) making the projecting camera project the three essential colors of the color wheel in mixing rations Rn, Gn and Bn, and measuring the second optical physical quantities Xn, Ynr and Zn of the projecting camera; (C) according to the differences delta X, delta Y and delta Z between the first optical physical quantities Xr, Yr and Zr and the second optical physical quantities Xn, Ynr and Zn, adjusting the mixing ratios Rn, Gn and Bn; and (D) repeating the steps of (B) and (C) until the differences delta X, delta Y and delta Z approach to zero, namely the mixing ratio of the three essential colors corresponding to the non-essential color is found. By the method, the mixing ratios of the three essential colors corresponding to all non-essential colors can be automatically found, so the operation time is shortened, and the correction precision is improved.

Description

technical field [0001] The invention relates to a method and system for calibrating a projector, in particular to a method and system for automatically calibrating the color wheel of a projector that can reduce working time and improve calibration accuracy. Background technique [0002] DLP (Digital Light Processing) projectors using a single DMD (Digital Micromirror Device) chip are currently the most commonly used projectors on the market. This kind of DLP projector needs to use a color wheel to separate the colors, and then use the DMD chip to separate each pixel. The desired color is reflected onto the display screen. However, due to the use of a single DMD chip projector, the color wheel can only process one color at a time, which will cause some loss of brightness. In addition, because the spectral wavelength characteristics of different colors of light are different, different color reproduction will occur, especially red is often not bright enough in the color of th...

AI Technical Summary

Problems solved by technology

[0005] However, this kind of artificial visual method to find out the mixing ratio of the three main colors corresponding to each non-main color sub-color block is not only time-consuming, but also easy to lose its accuracy.

[0006] It can be seen that the above-mentioned existing method and system for calibrating the color wheel of a projector obviously still have inconvenience and defects in the method, system structure and use, and need to be further improved urgently.

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable method and system for calibrating the color wheel of projectors. The system can solve the above problems, which is obviously a problem that the relevant industry is eager to solve

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