Color Conversion Unit Power Optimization in Display Devices
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Solution Overview
Problem
Existing display devices face challenges in reducing power consumption, especially in low-luminance states, as color conversion methods may increase overall power consumption due to high lighting of light emitters in image display units.
Innovation Solution
A display device with a color converting unit that performs color conversion only when it does not exceed the power consumption of not performing conversion, utilizing a matrix of pixels with sub-pixels and adjusting hue and saturation within permissible ranges to reduce power usage, and employing specific luminance setting thresholds to determine when to perform color conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If color conversion is performed to reduce power consumption in the image display unit, then power consumption in the image display unit is reduced, but total power consumption (image display unit + color converting unit) may exceed power consumption without color conversion
Solution Approach 1:
The system dynamically adjusts the color conversion strategy based on luminance settings. At high luminance levels, color conversion is performed to reduce image display unit power consumption. At low luminance levels, color conversion is skipped to avoid exceeding total power consumption targets. This dynamic adaptation resolves the contradiction by optimizing the balance between image display unit power savings and total system power consumption across different operating conditions.
Solution Approach 2:
The system changes the operational parameters of the color converting unit based on luminance thresholds. When luminance exceeds a first threshold, color conversion is enabled with specific conversion parameters. When luminance falls below the threshold, color conversion is disabled or parameters are adjusted. This parameter change approach allows the system to reduce image display unit power consumption when beneficial while avoiding total power consumption increases when detrimental.
2Use of energy by moving object
If color conversion is performed to reduce power consumption, then power consumption in the image display unit is reduced, but display quality may deteriorate due to hue and saturation changes
Solution Approach 1:
The color conversion process applies different conversion strategies to different color components and luminance ranges. Specifically, the system adjusts hue and saturation parameters locally based on the original color values and luminance levels, preserving display quality in critical regions while achieving power consumption reduction in less sensitive regions. This localized quality preservation resolves the contradiction between power savings and display quality maintenance.
Solution Approach 2:
The system accepts temporary, controlled deviations in display quality (hue and saturation changes) as a trade-off for power consumption reduction, similar to accepting temporary compromises. By limiting these changes to occur only when power consumption reduction benefits outweigh quality impacts (determined by luminance thresholds), the system resolves the contradiction between achieving power savings and maintaining acceptable display quality.
3Use of energy by moving object
If color conversion is performed in low-luminance states, then power consumption in the image display unit is reduced, but overall power consumption increases due to the color converting unit's operation
Solution Approach 1:
The system dynamically switches between two operational modes based on luminance detection: above the first luminance threshold, the color converting unit operates actively to reduce image display unit power consumption; below the threshold, the color converting unit is deactivated or its operation is minimized. This dynamic mode switching resolves the contradiction by adapting the color conversion operation to luminance conditions, ensuring power consumption reduction only when the image display unit's power consumption is sufficiently high to justify the color converting unit's operational cost.
Data Source
AI summary
According to an aspect, a display device includes an image display unit in which pixels each including a plurality of sub-pixels are arranged in a matrix, and a color converting unit that performs color conversion to reduce power consumption in the image display unit. The color converting unit does not perform the color conversion when total power consumption obtained by adding up the power consumption in the image display unit and power consumption in the color converting unit in a case where the color conversion is performed exceeds the power consumption in the image display unit in a case where the color conversion is not performed.