Display Panel Gate-Line Layout for Border Light Leakage
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Solution Overview
Problem
Conventional display panels suffer from light leakage in the border region due to floating gate lines after segmentation, causing pixel transistors to remain slightly turned on and emit light even when not powered, which is not effectively addressed by existing technologies.
Innovation Solution
A display panel design that includes a power control unit with a power line connected to second gate lines in the border region, allowing for the transmission of a power supply voltage to control second sub-pixels to a non-luminating state, thereby preventing light leakage. This design features a first display region and a border region with specific pixel driving circuits and gate lines, along with a power control unit that includes a power line connected to second gate lines to ensure the sub-pixels in the border region remain off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display screen is segmented to create smaller screens for diverse applications, then adaptability to different scenarios is improved, but light leakage in the border region occurs due to floating gate lines
Solution Approach 1:
The gate lines are divided into two segments: first gate lines in the display region and second gate lines in the border region. This segmentation allows independent control of each region, enabling the border region to be turned off while the display region remains active, thus preventing light leakage in the border area.
Solution Approach 2:
Different regions of the display panel are assigned different functional qualities: the display region uses first gate lines connected to the gate driver for normal operation, while the border region uses second gate lines that can be independently controlled to a non-conductive state. This local differentiation allows the border region to prevent light leakage while maintaining display functionality in the main area.
2Ease of manufacture
If conventional display panel structure is used after segmentation, then manufacturing simplicity is maintained, but the structure does not support reducing light leakage in the border region
Solution Approach 1:
The gate line structure is segmented into first and second gate lines that can be formed using the existing gate line fabrication process. This segmentation approach maintains compatibility with conventional manufacturing techniques while enabling independent control of border region pixels to prevent light leakage.
Solution Approach 2:
The second gate lines serve multiple functions: they can be kept conductive during normal display operation and switched to a non-conductive state when border region light leakage needs to be prevented. This multi-functionality allows a single structural modification to address both normal operation and light leakage prevention requirements.
Data Source
AI summary
A display panel is provided, including sub-pixels arranged in a first display region, pixel driving circuits arranged in a first border region, gate lines, and a power control unit. The gate lines include first gate lines arranged in the first display region and at least one second gate line arranged in the first border region. Each first gate line is electrically connected between a gate driver and the corresponding pixel driving circuit. The at least one second gate line is electrically connected to the corresponding pixel driving circuit. A power line of the power control unit is electrically connected to the at least one second gate line.