Display Device Pixel Region Segmentation for Power Reduction
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Solution Overview
Problem
Current display devices face challenges in reducing power consumption, particularly in managing the updating of display data between still images and moving images, where existing methods either consume excessive power or are inefficient in controlling display data rewriting frequencies.
Innovation Solution
A method for driving a display device that includes a first pixel and a second pixel, with distinct states for updating and non-updating display data, utilizing a scan line and wirings to supply setting data to control the on/off state of transistors and capacitors, allowing for differential updating frequencies based on image type, thereby optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If display data is updated frequently for all pixels, then moving image visibility is maintained, but power consumption increases
Solution Approach 1:
The display device divides the pixel array into multiple regions (first region and second region) with different updating behaviors. The first region updates display data at a lower frequency while the second region updates at a higher frequency, allowing differential power management across different spatial zones of the display.
Solution Approach 2:
The display device dynamically adjusts the updating frequency of different pixel regions based on the type of image content being displayed. When a still image is detected, the first region updates less frequently to save power, while moving image regions maintain higher update rates, creating a dynamic adaptation to content requirements.
2Use of energy by moving object
If display data updating frequency is reduced for still images, then power consumption decreases, but image quality may deteriorate
Solution Approach 1:
Different regions of the display are assigned different quality levels based on their updating frequency. The first region operates with lower update frequency acceptable for still images, while the second region maintains higher update frequency for moving images, ensuring that each region receives appropriate quality treatment for its specific usage scenario.
Solution Approach 2:
The display device changes the updating frequency parameter dynamically based on image type detection. When still images are detected, the updating frequency parameter is reduced for the first region; when moving images are detected, the parameter is increased, allowing the system to adapt quality parameters to match content requirements and minimize power consumption.
3Device complexity
If a single updating frequency is used for all pixels, then control is simplified, but power consumption cannot be optimized for different image types
Solution Approach 1:
The pixel array is segmented into multiple regions with independent updating frequency control. This segmentation allows the display device to apply different updating strategies to different regions simultaneously, optimizing power consumption for still image regions while maintaining performance for moving image regions, without requiring complete redesign of the control architecture.
Data Source
AI summary
Display data of pixels is updated at different timings. A scan line is connected to a first pixel and a second pixel, a first wiring is connected to the first pixel, and a second wiring is connected to the second pixel. In a first period, a signal for selecting the first pixel and the second pixel is supplied to the scan line. Setting data for setting a state where the display data of the first pixel is updated is supplied to the first wiring, and setting data for setting a state where the display data of the second pixel is updated is supplied to the second wiring. In a second period, a signal for selecting the first pixel and the second pixel is supplied to the scan line. Setting data for setting a state where the display data of the first pixel is not updated is supplied to the first wiring, and the setting data for setting the state where the display data of the second pixel is updated is supplied to the second wiring. In a third period, the first pixel displays first display data, and the second pixel displays second display data.