Partial-Region Display Timing to Prevent Boundary Quality Loss
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Solution Overview
Problem
When a display panel is partitioned into regions and driven under different conditions, the boundary regions experience degradation in display quality.
Innovation Solution
A display device with a timing controller that masks pulses in light emission and scan clock signals to selectively drive partial regions, using different clock signals and common control voltages to maintain display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the display panel is partitioned into regions and driven under different conditions, then power consumption is reduced, but display quality is degraded in boundary regions
Solution Approach 1:
The patent applies local quality by providing different drive conditions to different regions of the display panel. Specifically, a first region is driven at a first frequency while a second region is driven at a second frequency, allowing each region to have optimized drive conditions suited to its specific requirements, thereby reducing overall power consumption while maintaining display quality through localized optimization rather than uniform driving
Solution Approach 2:
The display panel is segmented into multiple regions (first region and second region) that can be independently controlled and driven at different frequencies. This segmentation allows the system to partition the display into zones with different power consumption characteristics, enabling selective driving strategies that reduce total power usage while maintaining quality in each segment
2Use of energy by stationary object
If the display panel is driven at different frequencies in different regions, then power consumption is reduced, but display quality degradation occurs at boundaries
Solution Approach 1:
The patent introduces a boundary region between the first and second regions that serves as an intermediary zone. This boundary region receives drive signals from both regions and is controlled to prevent display quality degradation. The timing controller acts as a mediator that coordinates the drive signals across region boundaries, ensuring smooth transitions and preventing artifacts that would otherwise occur at the interfaces between differently-driven regions
3Use of energy by stationary object
If only some regions are driven, then power consumption is reduced, but the timing controller becomes more complex
Solution Approach 1:
The patent implements selective region driving by controlling the timing controller to activate specific regions during specific time periods. The first region is driven during a first time period while the second region is driven during a second time period, creating a periodic driving pattern. This temporal separation allows the timing controller to manage complex multi-region operation through structured periodic sequences rather than requiring simultaneous complex coordination of all regions
Data Source
AI summary
A display device includes a display including scan lines, data lines, light emission control lines, and pixels connected thereto, a scan driver configured to sequentially provide scan signals to the scan lines, a data driver configured to provide data signals to the data lines, a light emitting driver configured to provide light emission control signals to the light emission control lines based on a light emission clock signal having pulses, and a timing controller configured to provide the light emission clock signal to the light emitting driver, to output the pulses of the light emission clock signal during a frame in a first mode, to mask at least one pulse of the pulses during a first period of the frame in a second mode, and to output at least another pulse of the pulses during a second period after the first period.