Pixel Circuit Storage Units for Display Power Reduction
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Solution Overview
Problem
Display devices, such as TFT-LCDs, experience increased power consumption when displaying multiple frames of images where parts or all of the image do not change consecutively, as they update the full screen image at a specific frequency, leading to unnecessary power usage.
Innovation Solution
A display panel with silicon substrate-based storage units corresponding to each display unit, where the storage units store and manage display data, allowing the system to differentiate between dynamic and static pixels, updating only dynamic pixels and maintaining static pixel data, thereby reducing the need for full-screen updates and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full-screen image updates are performed at a specific frequency (e.g., 60 Hz), then the display device can maintain consistent image quality and refresh rate, but power consumption increases when parts or all of the displayed image does not change in consecutive multi-frames
Solution Approach 1:
The display screen is divided into multiple independent pixel units, each with its own storage unit. The display data is segmented into individual pixel data that can be independently stored and updated. This allows the system to update only the necessary pixels rather than the entire screen, reducing power consumption while maintaining display refresh consistency.
Solution Approach 2:
Display data for all pixels is pre-loaded into respective storage units before the update cycle begins. The storage units hold the display data in advance, allowing the display device to quickly refresh only the changed pixels without needing to process and transmit entire frame data during the refresh cycle, thereby reducing power consumption.
2Productivity
If all display data is continuously updated at high frequency, then the display can show dynamic images accurately, but unnecessary updates of static pixels increase power consumption
Solution Approach 1:
The patent extracts and separates the storage function from the display update process by introducing dedicated storage units for each pixel. This allows the system to maintain a buffer of display data independently, enabling selective updating of only those pixels that have changed, thus maintaining high display update speed while reducing unnecessary power consumption from updating static pixels.
Solution Approach 2:
The system dynamically determines which pixels require updates by comparing current frame data with previously displayed data. Only pixels with changed values are selected for updating in each frame, making the update process adaptive and dynamic rather than static and uniform, thereby reducing power consumption while maintaining display productivity.
Data Source
AI summary
A pixel circuit, a display panel, a display device and a driving method thereof are provided. The display panel includes a silicon substrate and a plurality of display units and a plurality of storage units fabricated on the silicon substrate. The plurality of storage units correspond to the plurality of display units one to one, and the plurality of storage units are respectively configured to receive and store display data of the plurality of display units corresponding to the plurality of storage units.