Scan Line Timing Layout for Overlap-Free Display Driving
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Solution Overview
Problem
Existing display devices face challenges in achieving improved display quality, particularly in the arrangement and timing of scan signals to pixels, which can lead to inefficiencies and reduced image performance.
Innovation Solution
The display device incorporates a unique scan line configuration with branch lines and a scan driver that outputs scan signals with specific timing patterns, including dummy stages and alternating signal phases, to enhance pixel driving efficiency and reduce signal overlap, thereby improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If scan signals are applied to adjacent scan lines simultaneously, then pixel driving speed is improved, but signal interference and display quality deteriorate
Solution Approach 1:
The patent applies periodic action by dividing scan lines into odd-numbered and even-numbered groups that are driven alternately in different time periods. Adjacent scan lines receive scan signals at mutually exclusive times, creating a periodic pattern that prevents signal interference while maintaining efficient pixel driving through systematic time-division multiplexing.
2Manufacturing precision
If the number of scan lines is increased to improve resolution, then display quality is improved, but signal timing complexity and device complexity increase
Solution Approach 1:
The patent segments the scan lines into distinct odd-numbered and even-numbered groups, with each group driven by separate scan signal sequences. This segmentation allows independent timing control of each group, simplifying the overall signal timing complexity while enabling support for a larger total number of scan lines and improved display resolution.
Solution Approach 2:
The patent introduces a time dimension to the scan line addressing by applying scan signals to odd and even scan lines at different time periods. This temporal dimensionality change allows the system to manage increased numbers of scan lines without proportionally increasing timing complexity, as the two groups can be driven in parallel during their respective time slots.
3Reliability
If scan signal pulse width is increased to improve pixel activation reliability, then reliability is improved, but signal overlap between adjacent scan lines increases
Solution Approach 1:
By implementing periodic action with alternating odd and even scan line groups driven in different time periods, the patent enables each scan line to receive a sufficient pulse width for reliable pixel activation without causing signal overlap. The periodic separation in time ensures that when one scan line receives a wide pulse, adjacent scan lines are inactive, eliminating interference while maintaining activation reliability.
Data Source
AI summary
Disclosed is a display device including a display panel including a plurality of pixels, a plurality of scan lines, and a scan driver. The plurality of pixels includes a first pixel, a second pixel, a third pixel, and a fourth pixel. The plurality of scan lines includes a first scan line, a second scan line, a third scan line, and a fourth scan line. The scan driver includes a plurality of stages that are respectively connected to the plurality of scan lines and outputs a plurality of scan signals. Active periods of scan signals of scan lines adjacent to each other among a plurality of scan lines do not overlap each other.