Display Panel Gate-Drive Overlap for Scan-Line Charge Consistency
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Solution Overview
Problem
The large difference in charge capacity between the far end and the near end of scan lines in display panels due to long scan lines with many connected sub-pixels affects the overall display effect.
Innovation Solution
Implementing a display panel design with overlapping periods for scan signal transmission by first and second gate drive units, each connected to different scan lines, to extend the charging duration and improve charge capacity consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the scan line length is increased to connect more sub-pixels, then the display coverage is improved, but the charge capacity consistency between far end and near end deteriorates
Solution Approach 1:
The gate drive circuit is divided into multiple gate drive units (first gate drive unit, second gate drive unit, etc.) that operate independently. Each gate drive unit drives a portion of the scan lines, allowing the long scan line to be segmented into multiple shorter effective driving segments. This segmentation reduces the charge capacity difference between far end and near end while maintaining overall display coverage.
Solution Approach 2:
Multiple gate drive units transmit effective level signals in overlapping time periods. The first gate drive unit transmits signals during a first period, while the second gate drive unit transmits signals during a second period that overlaps with the first period. This preliminary overlapping action ensures that charge is delivered to different segments of the scan line simultaneously, compensating for the inherent charge capacity differences along the long scan line.
2Quantity of substance
If the scan line length is increased to connect more sub-pixels, then the number of connected sub-pixels is improved, but the voltage drop along the scan line increases
Solution Approach 1:
The scan line driving function is segmented across multiple gate drive units. Each gate drive unit drives a specific portion of the scan lines, effectively dividing the long scan line into multiple shorter driving segments. This reduces the cumulative voltage drop that would occur along a single long scan line while still connecting to the same large number of sub-pixels.
Solution Approach 2:
The overlapping transmission periods of multiple gate drive units create a continuous charging action along the scan lines. While the first gate drive unit is transmitting during its period, the second gate drive unit is also transmitting during the overlapping portion, ensuring continuous charge delivery to different segments of the scan line network, thereby maintaining voltage levels despite the large number of connected sub-pixels.
Data Source
AI summary
Provided are a display panel including multiple scan lines located in the display region and gate drive unit groups located in a non-display region. The gate drive unit groups include at least one first gate drive unit group and at least one second gate drive unit group. The first gate drive unit group includes multiple cascaded first gate drive units. The second gate drive unit group includes multiple cascaded second gate drive units. The first gate drive units and the second gate drive units are connected to different scan lines. A first period during which a first gate drive unit at the first stage transmits an effective level signal to a scan line and a second period during which a second gate drive unit at the first stage transmits an effective level signal to a scan line overlap, overlap duration is t, and t>0.