Display Backlight Luminance Control Using Low-Resolution Image Data
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Solution Overview
Problem
The increased resolution of display panels leads to a heavy computational load in determining light source emission intensities based on input image data, particularly in recent years.
Innovation Solution
A circuit apparatus that includes a resolution reduction circuit to generate low-resolution image data and a light source luminance determination circuit to determine light source luminance information using low-resolution image data, reducing the computational load by adjusting light emission based on this data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light emission intensity is determined based on tone value of each pixel of input image data, then accurate image display is achieved, but calculation load becomes heavy
Solution Approach 1:
The patent extracts only the necessary information (luminance components) from the full input image data to determine light emission intensity. By using low-resolution image data generated through resolution reduction, the system extracts sufficient luminance information while discarding unnecessary detail, thereby reducing calculation load while maintaining display accuracy.
Solution Approach 2:
The patent changes the resolution parameter of the image data from full resolution to low resolution. This parameter change allows the system to maintain luminance information needed for accurate display while significantly reducing the computational complexity and load associated with processing high-resolution data.
2Measurement precision
If resolution of display panel increases, then display quality improves, but calculation load for determining light emission intensity increases
Solution Approach 1:
The patent creates a copy of the input image data at lower resolution. This low-resolution copy contains sufficient luminance information to determine light emission intensity, allowing the system to work with a simplified version of the original high-resolution data, thereby reducing calculation load while maintaining display quality.
Solution Approach 2:
The patent segments the image data processing by separating the resolution reduction step from the light emission intensity determination step. This segmentation allows the system to process image data in stages, first reducing resolution and then determining luminance, which reduces overall computational complexity while maintaining display quality.
Data Source
AI summary
A circuit apparatus controls a display apparatus including a plurality of light source elements and a display panel. The circuit apparatus includes a resolution reduction circuit and a light source luminance determination circuit. The resolution reduction circuit generates, from input image data, low-resolution image data having a lower resolution than the input image data. The light source luminance determination circuit receives the low-resolution image data. The light source luminance determination circuit determines, by light adjustment processing based on the low-resolution image data, light source luminance information indicating luminance of light emitted by each light source element of the plurality of light source elements.