Pentile Pixel Layout With Time-Divided Driving for Lower Display Power
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Solution Overview
Problem
Display devices face increased power consumption due to the need to supply different color data signals to each data line during separate sub-frames, which is inefficient and consumes more power.
Innovation Solution
The display device employs a Pentile™ arrangement of pixels connected to scan and data lines, where pixels of the same color on different horizontal lines are driven in alternating sub-frames, and pixels of different colors on the same vertical line are connected to different data lines, using a data distributor with demultiplexers to time-divide data signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different color data signals are supplied to each data line during separate sub-frames, then all pixels can be driven correctly, but power consumption increases
Solution Approach 1:
The patent merges the driving of pixels of the same color across different horizontal lines into a single data line. For example, green pixels on both odd and even horizontal lines are driven through the same data line by alternating scan lines, rather than requiring separate data lines for each pixel. This consolidation reduces the number of active data lines and minimizes power consumption while maintaining correct pixel driving.
Solution Approach 2:
The patent implements periodic action by alternating between odd and even scan lines in different sub-frames. During the first sub-frame, odd scan lines are activated to drive pixels on odd horizontal lines, and during the second sub-frame, even scan lines are activated for even horizontal lines. This periodic activation pattern allows the same data line to serve multiple pixels at different times, reducing overall power consumption while ensuring all pixels receive correct data signals.
2Device complexity
If the number of output channels of the data driver is less than the number of pixels on one horizontal line, then device complexity is reduced, but power consumption increases
Solution Approach 1:
The patent segments the display into different horizontal line groups (odd lines and even lines) that are driven at different times through the same data lines. This temporal segmentation allows a reduced number of data driver output channels to suffice, as each data line serves different horizontal line segments alternately. The segmentation approach reduces device complexity by minimizing the number of required output channels while managing power consumption through time-multiplexed operation.
Solution Approach 2:
The patent employs periodic action by cycling through different horizontal line groups in alternating sub-frames. The data driver outputs data signals periodically to different scan line groups, allowing fewer output channels to drive more pixels over time. This periodic time-multiplexing reduces the instantaneous power consumption and device complexity compared to driving all pixels simultaneously with dedicated data lines.
Data Source
AI summary
A display device includes pixels arranged in the order of a first red pixel, a first green pixel, a first blue pixel, and a second green pixel on a first horizontal line; and pixels arranged in the order of a second blue pixel, a third green pixel, a second red pixel, and a fourth green pixel on a second horizontal line. The first red pixel and the second blue pixel located on the same vertical line are connected to different data lines, and the first green pixel and the second green pixel located on the first horizontal line are connected to different scan lines.