Display Device Dynamic Drive Pause Ratio for Power Quality Trade-off
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Solution Overview
Problem
Existing display devices face challenges in reducing power consumption while maintaining display quality, particularly for moving images, as longer pause periods can lead to poor image transition and lower quality, whereas still images can tolerate longer pause periods without quality deterioration.
Innovation Solution
A display device with a matrix pattern of pixels, a drive circuit, image identification means, drive/pause controlling means, and ratio setting means that adjust the drive and pause periods based on image type, allowing variable time ratios for still and moving images to optimize power consumption and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the pause period is extended to reduce power consumption, then electric power consumption is reduced, but the moving image display quality deteriorates due to poor image transition
Solution Approach 1:
The patent applies dynamics by making the pause period variable rather than fixed. The drive control section dynamically adjusts the pause period length based on image type detection: using a first (shorter) pause period for moving images to maintain display quality, and a second (longer) pause period for still images to maximize power savings. This dynamic adaptation resolves the contradiction between power consumption and display quality.
Solution Approach 2:
The patent changes the parameter of pause period duration based on the detected image type. By detecting whether the displayed image is a still image or moving image, the system adjusts the pause period parameter accordingly - shorter for moving images, longer for still images - thereby optimizing both power consumption and display quality for different scenarios.
2Use of energy by moving object
If the pause period is extended for still images, then power consumption is reduced without quality loss, but the system cannot simultaneously optimize for moving images
Solution Approach 1:
The system dynamically adapts the pause period based on real-time detection of image type. The drive control section switches between different pause period settings (first pause period for moving images, second pause period for still images) according to what is being displayed, enabling the system to optimize for both image types rather than being fixed to a single mode.
Solution Approach 2:
The patent applies local quality by applying different pause period settings to different image types. Instead of using a uniform pause period for all images, the system tailors the pause period length to the specific characteristics of the displayed content - shorter pauses for moving images where quality is paramount, longer pauses for still images where power savings are prioritized.
Data Source
AI summary
In an intermittent drive mode of a display device in which driving and pausing of the driving are repeated, an image identification section identifies an input image as a still image or a moving image. In a case where the moving image is identified, a drive/pause control section generates a drive/pause control signal with a period ratio in accordance with the moving image. A timing control section generates a driver control signal so that intermittent driving is carried out. Then, a source driver and a gate driver drives a display section so that the drive period and the pause period are repeated with a predetermined period ratio, so that the input image is displayed. The drive/pause control section sets a time ratio between the drive period and the pause period to be variable for each of the moving image and the still image.