Multi-primary Display Color Shift Correction via Blue Data Regulation
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Solution Overview
Problem
Multi-primary color displays using four colors (red, green, blue, and white) face a color shift issue due to reduced blue component brightness during color temperature compensation, affecting the maintenance of specified white color temperature.
Innovation Solution
A display apparatus and method that includes a data processing unit to regulate blue reference data based on blue component brightness corresponding to white reference data, using a numerical calculating unit to determine a backlight mapping ratio and transform data to produce reference data for red, green, and white sub-pixels, while adjusting blue data to mitigate color shift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If color temperature compensation is applied to multi-primary color display, then white color temperature can be maintained within specified range, but blue component brightness is reduced causing color shift
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the blue reference data based on the white reference data's blue component brightness. The data processing unit modifies the blue channel parameters according to the relationship between white and blue components, allowing the system to maintain color temperature while compensating for brightness reduction through calculated parameter adjustments rather than fixed values
Solution Approach 2:
The patent implements feedback by using the white reference data to regulate and adjust the blue reference data. The system continuously monitors the blue component brightness in the white reference and uses this information to feedback-adjust the blue channel, creating a closed-loop control mechanism that maintains color temperature while compensating for brightness changes
2Adaptability or versatility
If four colors (red, green, blue, white) are used to achieve color-mixing effect, then color gamut range is widened, but color shift issue occurs due to reduced blue component brightness
Solution Approach 1:
The patent uses parameter changes to maintain color accuracy in the four-color display system by dynamically adjusting blue reference data based on white reference data. This allows the system to preserve the expanded color gamut range while compensating for the color shift caused by blue component brightness reduction, thus maintaining reliability
Solution Approach 2:
The patent introduces an intermediary approach by using white reference data as a mediator between the original input data and the final blue output data. The white reference serves as an intermediate step that provides information about blue component brightness, which then mediates the adjustment of the blue channel to maintain color accuracy while preserving the benefits of four-color display
Data Source
AI summary
A display apparatus and a method for transforming color thereof are provided. The display apparatus includes a display panel having a red sub-pixel, a blue sub-pixel, a green sub-pixel and a white sub-pixel, a driver circuit for driving the red sub-pixel, the blue sub-pixel, the green sub-pixel and the white sub-pixel, and a data processing unit. The data processing unit receives a red original data, a blue original data and a green original data to produce a red reference data, a green reference data and a white reference data to the driver circuit as a red data, a green data and a white data, and regulate a produced blue reference data thereof according to a blue component brightness corresponding to the white reference data to provide the a blue data to the driver circuit.