Display Grayscale Driving for Critical Image Power Control
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Solution Overview
Problem
Current display devices consume significantly more power when displaying critical images compared to normal images, leading to increased design costs and limiting the application range of portable devices.
Innovation Solution
A driving method for display devices that adjusts sub-pixel grayscale values by calculating and comparing absolute differences between adjacent sub-pixels, and adjusting these values when the difference exceeds a threshold, thereby reducing the likelihood of displaying critical images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display device displays a critical image with high contrast between adjacent sub-pixels, then the image quality and visual effect are improved, but the power consumption increases significantly
Solution Approach 1:
The patent applies preliminary action by detecting critical image regions in advance and pre-adjusting the grayscale values of sub-pixels before the high power consumption occurs. The controller identifies areas with large grayscale differences between adjacent sub-pixels and modifies these values proactively, preventing the critical image condition from arising in the first place, thus avoiding the associated power consumption spike while maintaining acceptable image quality.
2Illumination intensity
If the display device displays a critical image, then the visual effect is improved, but the design cost of the power supply increases
Solution Approach 1:
The patent implements feedback by continuously monitoring the grayscale values of adjacent sub-pixels and comparing the absolute difference against a threshold. When a critical condition is detected (large grayscale difference), the system provides feedback to the controller, which then adjusts the grayscale values accordingly. This closed-loop feedback mechanism enables the display device to dynamically adapt to critical image conditions, reducing power consumption peaks and thereby lowering power supply design costs without compromising visual effect.
3Illumination intensity
If the display device displays a critical image, then the image quality is improved, but the application range of portable display devices is limited
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the grayscale values of sub-pixels based on the detected image content. When critical images are detected (large grayscale differences between adjacent sub-pixels), the system modifies the grayscale parameters to reduce the absolute difference, thereby transforming the image display characteristics in real-time. This parameter adjustment approach enables portable display devices to maintain acceptable image quality across diverse applications while significantly reducing power consumption, thus expanding their application range.
Data Source
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AI summary
A driving method for a display device, which has sub-pixels, scan lines and data lines, includes the steps of: receiving a frame data including multiple sub-pixel grayscale values corresponding to the sub-pixels; calculating an absolute difference value between a first sub-pixel grayscale value and a second sub-pixel grayscale value, wherein the first sub-pixel is electrically connected with a data line and one of two scan lines, the second sub-pixel is electrically connected with the data line and the other one of the two scan lines; and, when the absolute difference value is greater than or equal to a first threshold, adjusting at least one of the sub-pixel grayscale values of the first and second sub-pixels, wherein an absolute difference value between the adjusted sub-pixel grayscale values of the first and second sub-pixels is smaller than the absolute difference value between the first and second sub-pixel grayscale values.