Display Panel Sub-Pixel Alternation to Reduce Power and Heat
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices using inorganic light-emitting elements face high power consumption and heating issues due to continuous supply of pixel data, scan signals, and light emission signals, which reduces their lifespan and efficiency.
Innovation Solution
A display device with a display panel that alternately drives sub-pixels of different colors at intervals of at least one frame period, synchronizing data and scan signals for still images or low driving frequencies, and turning off light emission signals during still images or low frequencies to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel data, scan signals, and light emission signals are continuously supplied to drive the pixel circuit, then the display device can maintain continuous operation and display moving images, but power consumption increases and heating issues occur
Solution Approach 1:
The patent applies periodic action by alternately driving different sets of sub-pixels (first and second sub-pixels) in different frame periods. During odd frame periods, first sub-pixels are driven while second sub-pixels remain inactive, and during even frame periods, the roles are reversed. This periodic switching reduces the duty cycle of signal supply, thereby lowering power consumption while maintaining continuous display operation through frame interleaving.
Solution Approach 2:
The patent segments the pixel array into multiple independent sub-pixel groups (first sub-pixels and second sub-pixels) that can be driven independently. Each sub-pixel group has its own pixel circuit that can be selectively activated. This segmentation allows the display to divide the driving workload across multiple groups, reducing the simultaneous power demand of any single group while maintaining overall display functionality.
2Reliability
If pixel data, scan signals, and light emission signals are continuously supplied to drive the pixel circuit, then the display device can maintain continuous operation, but heating issues occur that reduce device lifespan
Solution Approach 1:
By implementing periodic driving of sub-pixel groups with alternating active and inactive periods, the patent reduces the continuous power dissipation that causes heating. The inactive sub-pixel groups do not consume power and generate minimal heat, allowing thermal management while maintaining display continuity through frame interleaving of active groups.
3Productivity
If all sub-pixels are driven simultaneously at high frequency, then the display can show moving images with high refresh rate, but power consumption and response power requirements increase
Solution Approach 1:
The patent achieves high refresh rate display of moving images by interleaving the driving of first and second sub-pixel groups across alternating frame periods. Each group is driven at full refresh rate during its active periods, but they operate in a time-division multiplexed manner. This maintains the perceived refresh rate through persistence of vision while reducing instantaneous power consumption compared to simultaneous driving of all sub-pixels.
Solution Approach 2:
The patent implements dynamic driving where the activation state of sub-pixel groups changes over time based on frame period parity. The system dynamically switches which sub-pixel group is active during odd versus even frame periods, optimizing power usage while maintaining continuous display output. This dynamic time-division approach adapts the driving pattern to reduce power demands during operation.
Data Source
AI summary
A display device can include a display panel including a plurality of data lines, a plurality of gate lines, and a plurality of pixels, at least one of the plurality of pixels including a main group of sub-pixels having a first-first sub-pixel, a second-first subpixel and a third-first subpixel, and a redundancy group of sub-pixels having first-second sub-pixel, a second-second subpixel and a third-second subpixel, and a controller configured to drive the main group of sub-pixels and the redundancy group of sub-pixels in an alternating manner to display images. Also, the first-first sub-pixel and the first-second sub-pixel are configured to emit a same first color of light, the second-first sub-pixel and the second-second sub-pixel are configured to emit a same second color of light, and the third-first sub-pixel and the third-second sub-pixel are configured to emit a same third color of light.