Display Device Demultiplexer Segmentation Power Reduction
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Solution Overview
Problem
Display devices face challenges in reducing power consumption while maintaining performance, particularly in efficiently connecting and driving multiple color pixels with existing data lines and demultiplexers.
Innovation Solution
The implementation of a display device with first to fourth pixel arrays and a demultiplexer that electrically connects data lines to data output lines, allowing for efficient alternation of data signals to color pixels, reducing power consumption by maintaining a constant voltage level during image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a conventional data driving circuit connects multiple color pixels to multiple data output lines, then all pixels can be driven simultaneously, but power consumption increases due to frequent voltage level changes
Solution Approach 1:
The pixel array is divided into first and second pixel arrays with different color pixel compositions. First pixel arrays contain first color pixels connected to first data output lines, while second pixel arrays contain second color pixels connected to second data output lines. This segmentation allows independent driving of different color pixel groups, reducing the frequency of voltage level changes on each data output line and thereby reducing power consumption.
Solution Approach 2:
The data driving circuit dynamically selects which data output lines to activate based on the image data requirements. When displaying images with certain color characteristics, the circuit can maintain constant voltage levels on specific data output lines for extended periods, reducing unnecessary voltage transitions and power consumption while still providing full functionality when needed.
2Ease of operation
If data lines are directly connected to data output lines without demultiplexer, then connection is simple, but efficient alternation of data signals to different color pixels cannot be achieved
Solution Approach 1:
A demultiplexer is introduced as an intermediary component between the data lines and data output lines. The demultiplexer receives data signals from the data lines and selectively routes them to appropriate data output lines based on control signals. This intermediary enables efficient alternation of data signals to different color pixel groups while maintaining a relatively simple overall circuit structure.
3Device complexity
If all color pixels are connected to the same data output line, then circuit complexity is reduced, but power consumption increases due to simultaneous voltage changes for all pixels
Solution Approach 1:
The display device segments the pixel array into first and second pixel arrays that are connected to different data output lines. First color pixels in the first pixel array are connected to first data output lines, while second color pixels in the second pixel array are connected to second data output lines. This segmentation allows independent voltage control of different color pixel groups, reducing simultaneous voltage changes and thereby reducing power consumption while maintaining manageable circuit complexity.
Data Source
AI summary
A display device includes four pixel arrays, a data driver, and a demultiplexer. The data driver is electrically connected to first and second data output lines. The demultiplexer electrically connects first and second data lines to the first data output line and electrically connects third and fourth data lines to the second data output line. The first to fourth pixel arrays are adjacent to the first to fourth data lines, respectively. Each of the first to fourth pixel arrays includes first and second color pixels. The first color pixels in the second pixel array are connected to the second data line, the second color pixels in the second pixel array are connected to the third data line, the second color pixels in the third pixel array are connected to the third data line, and the first color pixels in the third pixel array are connected to the second data line.