White balance correction method, device and system for projection device

Abstract

The present invention relates to the technical field of white balance, in particular to a method, device and system for correcting white balance of a projection device. This application sends a pattern projection command to the projection device to be corrected, sends a color coordinate acquisition command to the color measurement device, and compares the obtained current color coordinate with the target color coordinate range. If the current color coordinate is not within the target color coordinate range, according to The pre-stored blue light current and color coordinate linear relationship formula, red light current and color coordinate linear relationship formula, and green light current and color coordinate linear relationship formula adjust the blue light current, red light current and green light current of the projection device to be corrected. One, two or three. The purpose of correcting the white balance is achieved by adjusting the driving current by adopting an algorithm calculation method, and the white balance standard can be achieved in a short time while ensuring the brightness, thereby improving the product quality of the projection device.

Description

technical field [0001] The present invention relates to the technical field of white balance, in particular to a method, device and system for correcting white balance of a projection device. Background technique [0002] The existing method for performing white balance correction on the projector system is to replace the Duty (duty ratio) sequence file. The idea of ​​using the Duty method is: before the optical machine leaves the factory, the white balance calibration of the optical machine unit is performed. The general operation method is to project red, green, blue, and white patterns by light and machine, and use color detection instruments such as illuminance meters to measure the color coordinate information of different monochromatic images. For the required Duty, obtain the sequence file in the sequence file library of the PC, use the optical machine firmware burning tool, and download it to the optical machine Flash. The entire calibration process takes a long ti...

AI Technical Summary

Problems solved by technology

The entire calibration process takes a long time and requires the use of PCs, optical-mechanical fixtures, and programming tools, etc.

[0003] Using the Duty method to calibrate the white balance of the optical machine alone can only ensure that the color coordinates of the optical machine use the jig to meet the white balance requirements during the calibration process, but in the process of assembling the optical machine into a complete machine Due to the difference in heat dissipation, temperature, current, etc. of the whole machine, the color point will inevitably shift, which cannot meet the requirements of white balance.

And using the Duty method to perform white balance correction requires burning the firmware of the optical device, and it takes a long time

If the power is cut off during the burning process, it will inevitably lead to the problem that the optical machine cannot be lit again

In actual production, it will directly lead to an increase in production costs

[0004] At present, some people have mentioned the idea of ​​adjusting the color coordinates by means of current, but in actual adjustment, there is no plan for how to adjust the current to achieve the white balance standard in a shorter time

In addition, adjusting the driving current will affect the brightness at the same time. If the adjustment is not proper, the brightness will inevitably be lost. The existing technology cannot meet the white balance standard while ensuring the brightness of the product.

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