Pixel Array Substrate Scan Line Pitch and Timing
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Solution Overview
Problem
In frameless display panels, coupling induction between adjacent signal lines causes signal fluctuations, affecting display quality due to the close proximity of scan lines.
Innovation Solution
A pixel array substrate design where first and second scan lines are alternately disposed with a specific distance, allowing different time durations for activation, and a gate drive circuit is used to manage signal enablement, reducing coupling induction by maintaining a third to half pitch distance between adjacent scan lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If scan lines are disposed close together to increase display area, then the frameless display panel achieves larger image display area, but coupling induction between adjacent scan lines causes signal fluctuations
Solution Approach 1:
The scan lines are divided into two separate groups: first scan lines and second scan lines, which are disposed alternately. This segmentation allows for independent control and timing of different scan line groups, reducing mutual interference while maintaining high density arrangement for large display area
Solution Approach 2:
The first scan lines and second scan lines are enabled for different time durations in a periodic manner. By controlling the timing sequences differently for the two groups, the patent reduces coupling induction effects while maintaining continuous scanning coverage for the entire display area
2Quantity of substance
If the distance between adjacent scan lines is reduced to increase pixel density, then more pixels can be accommodated, but coupling induction causes signal fluctuation disturbance
Solution Approach 1:
Different regions of the display panel use different scan line configurations. First scan lines and second scan lines are disposed alternately with specific distance relationships, allowing local optimization of signal integrity while maintaining overall high pixel density across the entire display area
Solution Approach 2:
The patent introduces a temporal dimension to the scan line arrangement by enabling first and second scan lines for different time durations. This time-based differentiation allows adjacent scan lines to be placed closer together spatially while avoiding simultaneous activation that would cause coupling induction
Data Source
AI summary
A pixel array substrate includes a substrate, first and second scan lines, data lines, and pixel structures. The first and second scan lines are disposed alternately and are enabled for different time durations in the same frame time. The data lines intersect with the first and second scan lines. Each of the pixel structures includes first and second active devices, and a pixel electrode. The first and second active devices are turned on and off by the first and second scan lines, respectively. The pixel electrode is connected to the first active device which is connected to one of the data lines by being connected to the second active device. A distance between the first and second scan lines adjacent to each other is a third to a half of a pitch of the pixel structures.