Pixel-Embedded Memory Display Circuit for Partial Data Writing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in managing power consumption and selectively controlling display pixels across various applications, requiring improved power management and precise data writing timing.
Innovation Solution
A pixel driving circuit with a data driving circuit, pixel-embedded memory, and signal distributor that allows for partial data writing modes, enabling selective control of display pixels based on operation modes and utilizing a reset controller to manage data updates, reducing unnecessary writing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If full data writing is performed for all display pixels, then data completeness is ensured, but power consumption increases
Solution Approach 1:
The patent implements partial data writing mode where only a subset of display pixels receive data updates during each refresh cycle. The data driver selectively writes data to specific pixel blocks based on whether their current displayed content matches the new frame content, performing partial rather than complete data writing across all pixels. This reduces power consumption while ensuring data completeness for pixels that actually need updates.
2Loss of energy
If selective data updates are implemented for subset of pixels, then power consumption is reduced, but data writing timing control becomes more complex
Solution Approach 1:
The patent divides the display pixel array into multiple selectable blocks or regions. The data driver can independently control data writing to different pixel blocks, enabling selective updates. This segmentation allows simplified timing control for each block while achieving overall power reduction through selective updating of only necessary pixel regions.
Solution Approach 2:
The system compares current frame data with previously displayed data to determine which pixels actually need updates. This feedback mechanism identifies pixels requiring data writing, enabling the data driver to selectively update only those pixels rather than all pixels, thus reducing power consumption while maintaining proper timing control.
3Loss of energy
If partial data writing mode is used, then power consumption is reduced, but data writing precision and timing accuracy may be compromised
Solution Approach 1:
The system performs preliminary comparison between current and previous frame data before initiating data writing operations. This preliminary action identifies which pixels require updates, allowing the data driver to prepare and execute precise timing-controlled data writing only to those specific pixels, thereby maintaining timing accuracy while reducing overall power consumption.
Data Source
AI summary
A pixel driving circuit for a display device includes a data driving circuit configured to output control signals indicating operation modes and a data signal indicating image data through a column line or a row line, and an array of a plurality of pixels, each pixel including a light-emitting element, and a pixel-embedded memory configured to receive the data signal from the column or row line via a first signal path, and configured to store the image data to drive the light-emitting element of a pixel, and a signal distributor configured to connect the first signal path to or disconnect the first signal path from the column or row line based on the operation modes.