Display Driver Color Addition Circuitry for Accurate Grayscale
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Solution Overview
Problem
Display panels with additional subpixels for colors like yellow or cyan face challenges in maintaining image quality due to lack of grayscale values in RGB data, requiring effective color addition processing and correction to match intended color gamuts.
Innovation Solution
A display driver with storage and color addition processing circuitry that generates FRGB data by storing F subpixel data from color coordinates, allowing for proper grayscale value determination of additional colors, and performing color correction to maintain image quality and color gamut matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If color addition processing is performed on RGB data for display panels with additional subpixels, then image quality is improved, but grayscale values for additional colors are inaccurate without proper F subpixel data
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing F subpixel data (grayscale values for additional color subpixels) in storage circuitry before actual color addition processing occurs. This pre-computed data is derived from color coordinate information and is readily available when needed, eliminating the need for complex real-time calculations and ensuring accurate grayscale values for additional colors during display operation.
2Manufacturing precision
If F subpixel data is stored in storage circuitry for color addition processing, then color gamut matching is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by transforming color coordinate data into F subpixel grayscale values through pre-computation and storage. This changes the parameter representation from generic RGB values to specific FRGB values that include accurate grayscale information for additional color subpixels, enabling precise color gamut matching without requiring complex real-time transformation circuits.
3Measurement precision
If color correction processing is performed to match color gamuts, then image quality is improved, but processing time and complexity increase
Solution Approach 1:
The patent applies preliminary action by performing color correction calculations in advance and storing the corrected F subpixel data in storage circuitry. This pre-correction process eliminates the need for time-consuming real-time color correction during display operation, as the corrected grayscale values are readily available from storage, thus reducing processing time while maintaining color accuracy.
4Adaptability or versatility
If additional subpixels are added to display panels, then color representation is improved, but maintaining image quality becomes more difficult
Solution Approach 1:
The patent applies the intermediary principle by introducing F subpixel data as a mediator between the additional color subpixels and the standard RGB color space. This intermediary data structure provides the missing grayscale information for additional colors, enabling seamless integration of new subpixel types while maintaining consistent image quality and color accuracy across the display panel.
Data Source
AI summary
A display driver that drives a display panel comprises storage circuitry, color addition processing circuitry, and drive circuitry. The storage circuitry stores F subpixel data acquired from color coordinate data indicating color coordinates of a displayed color in a predetermined color space displayed on the display panel when an R subpixel, a G subpixel, and a B subpixel in each of a plurality of pixels of the display panel are driven with drive signals corresponding to a minimum grayscale value and an F subpixel in each of the plurality of pixels which displays an additional color other than a primary color R, a primary color G, and a primary color B is driven with a drive signal corresponding to a maximum grayscale value. The color addition processing circuitry generates output FRGB data from input RGB data, in response to the F subpixel data stored in the storage circuitry.