Display Driving Frequency Control for Power and Quality
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Solution Overview
Problem
Image display devices face challenges in reducing power consumption while maintaining display quality, as fixed driving frequencies either result in motion blur or excessive power usage, and adaptive methods based on synchronizing signals consume unnecessary power regardless of data signals.
Innovation Solution
An image display device with a driving frequency selecting unit that adjusts the driving frequency based on data supplied from an external system, using a frame memory, counter, and determinator to generate a selecting signal for optimal frequency selection, reducing power consumption and improving display quality by dynamically adjusting the driving frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving frequency is fixed at a higher frequency (e.g., 120 Hz), then display quality is improved by reducing motion blur, but power consumption increases
Solution Approach 1:
The patent implements dynamic driving frequency adjustment by switching between first and second driving frequencies based on image type detection. The driving frequency is no longer fixed but adapts to the content being displayed, using a higher frequency for moving images to maintain quality and a lower frequency for still images to reduce power consumption.
Solution Approach 2:
The patent changes the driving frequency parameter based on the detected image type. By detecting whether the image is still or moving and adjusting the driving frequency accordingly, the system optimizes the balance between display quality and power consumption through parameter adaptation.
2Use of energy by moving object
If the driving frequency is fixed at a lower frequency (e.g., 60 Hz), then power consumption is reduced, but display quality deteriorates due to motion blur
Solution Approach 1:
The system dynamically adjusts the driving frequency based on the detected image type. When motion is detected in the input image, the driving frequency switches to a higher value to prevent motion blur, while maintaining lower frequency for still images to conserve power.
Solution Approach 2:
The driving frequency parameter is changed based on image content analysis. The system detects motion in the input image and adjusts the driving frequency parameter accordingly, ensuring display quality is maintained when needed while reducing power consumption when possible.
3Use of energy by moving object
If the driving frequency is adaptively adjusted using synchronizing signals, then power consumption is reduced for still images, but unnecessary power is consumed regardless of data signals
Solution Approach 1:
The patent performs preliminary detection of the image type (still or moving) before adjusting the driving frequency. By analyzing the input image data in advance and detecting motion characteristics, the system determines the appropriate driving frequency to use, ensuring power consumption is optimized based on actual content requirements.
Solution Approach 2:
The system uses feedback from image type detection to control driving frequency adjustment. By continuously monitoring the input image characteristics and using this feedback to adjust the driving frequency, the system optimizes power consumption while responding appropriately to actual data signal requirements.
Data Source
AI summary
Disclosed is an image display device capable of reducing power consumption and improving display quality. The image display device includes pixels disposed at portions at which scanning lines and data lines intersect with each other; a scanning driving unit driving the scanning lines; a data driving unit driving the data lines; a driving frequency selecting unit generating a selecting signal including information on a driving frequency using data supplied from an external system; and a timing controlling unit controlling the scanning driving unit and the data driving unit using the driving frequency included in the selecting signal.