Scan Driving Circuit Masking for Mixed-Image Display Power Saving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a desire to reduce power consumption in display devices that display multiple images, as existing technologies do not efficiently manage the power usage when showing a combination of still and moving images.
Innovation Solution
The display device is divided into areas for still and moving images, with different driving frequencies applied to each area, and a masking signal is used to adjust the scan line frequencies, reducing power consumption without deteriorating display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the display device operates at a high driving frequency to display moving images, then the display quality and responsiveness are improved, but the power consumption increases
Solution Approach 1:
The display device divides the display area into first and second areas, applying different driving frequencies to each region. The first area displays moving images at a higher driving frequency while the second area displays still images at a lower driving frequency, thereby reducing overall power consumption while maintaining display quality for moving images
Solution Approach 2:
Different regions of the display are assigned different operational characteristics - the first area operates at high frequency for moving images while the second area operates at low frequency for still images. This local differentiation allows each region to operate optimally for its content type, reducing unnecessary power consumption in still image regions
2Use of energy by moving object
If the display device lowers the driving frequency to reduce power consumption, then the power consumption decreases, but the display quality and responsiveness deteriorate
Solution Approach 1:
The display device dynamically adjusts the driving frequency based on the content being displayed in different areas. The driving frequency is changed according to whether the content is a moving image or still image, allowing the system to optimize between power consumption and display quality in real-time
3Use of energy by moving object
If different driving frequencies are applied to different areas, then the power consumption is reduced, but the system complexity increases
Solution Approach 1:
The display device is segmented into distinct driving frequency zones with a frequency adjustment unit that manages multiple driving frequencies. This segmentation allows independent control of different areas, enabling power savings while maintaining a manageable system architecture through modular frequency management
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption by lowering the driving frequency in areas displaying still images, while maintaining display quality by using a masking signal to manage scan line frequencies effectively.
Implementation Method 1
an organic light emitting diode that generates light by recombination of electrons and holes
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Described is a scan driving circuit including: a driving circuit configured to output a scan signal to an output terminal in response to clock signals and a carry signal; and a masking circuit configured to stop the driving circuit from outputting the scan signal in response to a masking signal and a signal indicating an operating state of the driving circuit.