Color Correction Circuit With Reduced-Resolution Luminance Analysis
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Solution Overview
Problem
Existing display technologies face challenges in reducing the processing speed of local dimming processing to align with the processing speed of circuit devices as image resolution increases, without an effective method for reducing calculation speed in backlight emission intensity determination and display data generation units.
Innovation Solution
A circuit device that includes a luminance analysis circuit for resolution reduction, a dimmer circuit for determining light source luminance, and two color correction circuits for separate areas of a display panel, performing color correction based on light source luminance information to split image data, thereby reducing processing speed and maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image resolution is increased, then image quality is improved, but processing speed of local dimming processing becomes too fast for circuit device capabilities
Solution Approach 1:
The image data is divided into multiple areas (first area and second area) corresponding to different light source element groups. Color correction is performed separately for each area using dedicated circuits (first color correction circuit and second color correction circuit), allowing parallel processing while maintaining overall processing speed control
Solution Approach 2:
The processing speed is dynamically adjusted by controlling the calculation speed in the dimming processing unit through resolution reduction of luminance information, while maintaining high-quality color correction through dedicated parallel circuits for each area
2Speed
If calculation speed is reduced in backlight emission intensity determination, then processing speed aligns with circuit device capabilities, but image quality may deteriorate
Solution Approach 1:
The color correction process is segmented into area-specific operations (first color correction circuit for first area, second color correction circuit for second area), allowing parallel processing that maintains image quality while controlling overall processing speed
Solution Approach 2:
Luminance information serves as an intermediary between the dimming processing and color correction processes. By performing resolution reduction on luminance information specifically (rather than full image data), the system controls processing speed while preserving sufficient detail for quality color correction
Data Source
AI summary
A circuit device includes a luminance analysis circuit, a dimmer circuit, a first color correction circuit, and a second color correction circuit. The luminance analysis circuit performs luminance analysis and resolution reduction on image data of an input image to output luminance information having resolution lower than that of the input image. The dimmer circuit determines, according to the luminance information, light source luminance information indicating light-emission luminance at which each of light source elements emits light. The first color correction circuit performs color correction on first split image data corresponding to a first area of a display panel, based on the light source luminance information. The second color correction circuit performs color correction on second split image data corresponding to a second area of the display panel, based on the light source luminance information.