Display Panel Sub-Pixel Grouping for Power Reduction
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Solution Overview
Problem
Existing flat panel display technologies face high power consumption due to frequent charging and discharging of sub-pixels, particularly at higher refresh rates, which has not been adequately addressed.
Innovation Solution
The display panel employs a scanning drive circuit that strategically drives first and second groups of sub-pixels to emit light at alternating frames, reducing the number of sub-pixels charged and discharged during each refresh cycle, while maintaining the overall refresh rate and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the refresh rate of the display panel is increased to improve display quality, then the display quality is improved, but the power consumption increases due to more frequent charging and discharging of sub-pixels
Solution Approach 1:
The sub-pixels are divided into first sub-pixels and second sub-pixels that are driven at different refresh rates. The first sub-pixels are refreshed at a higher frequency while the second sub-pixels are refreshed at a lower frequency, allowing the display to maintain overall quality while reducing total power consumption by segmenting the refresh burden across different pixel groups
Solution Approach 2:
The display panel implements periodic refresh cycles where different groups of sub-pixels are activated at different time intervals. By periodically refreshing only certain sub-pixel groups at high frequency while others refresh at lower frequency, the system maintains display quality through temporal multiplexing while reducing average power consumption
2Illumination intensity
If the refresh rate is adjusted to 60 Hz to improve display quality, then the display quality is improved, but the power consumption increases due to frequent sub-pixel charging and discharging
Solution Approach 1:
The sub-pixels are segmented into at least two groups: first sub-pixels that are refreshed at every frame and second sub-pixels that are refreshed at alternative frames. This segmentation allows the display to maintain 60 Hz overall refresh rate for quality while reducing the number of sub-pixels charged and discharged simultaneously, thereby reducing energy loss
Solution Approach 2:
Instead of refreshing all sub-pixels at every frame, the patent applies partial action by refreshing only a portion of the sub-pixels (either first or second group) at each frame. This partial refresh approach maintains perceptual display quality while significantly reducing the total charging and discharging operations, thus reducing energy loss
Data Source
AI summary
A display panel includes multiple scanning lines, sub-pixels and a scanning drive circuit. The sub-pixels include first sub-pixels, second sub-pixels and third sub-pixels. Each scanning line connects to sub-pixels of one same type of emission. The first sub-pixels include a first group and a second group, and the third sub-pixels include a first group and a second group. The scanning drive circuit is used for driving a fraction of the sub-pixels in one frame. In odd frames, only first group of the first sub-pixels, and the third sub-pixels, and the second sub-pixels are driven to emit light in odd frames. In even frames, only second group of the first sub-pixels and the third sub-pixels, and the second sub-pixels are driven to emit light. When the display screen is refreshed, the number of the sub-pixels driven to emit light is reduced, and power of charging and discharging of the sub-pixels is reduced.