Display Panel Carry-Line Layout for Narrow-Bezel Scan Driving
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Solution Overview
Problem
Existing display panels have a significant non-display region or bezel region that hinders the reduction of the overall display area, which is a market demand.
Innovation Solution
The display panel design includes a reduced non-display region by optimizing the arrangement of scan lines, carry lines, and stages, with specific configurations such as non-overlapping carry lines and staggered stages, and utilizing different phases of clock signals and scan signals in different modes to enhance efficiency and reduce the non-display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the non-display region is reduced to increase display area, then the display area is increased, but the routing of scan lines and carry lines becomes more complex and difficult to implement
Solution Approach 1:
The display panel is divided into a display region and a non-display region, with the non-display region further segmented into different functional zones (first non-display region for scan lines, second non-display region for carry lines). This segmentation allows independent optimization of line routing in each zone, reducing overall routing complexity while maximizing display area.
Solution Approach 2:
The patent utilizes multiple layers (first layer, second layer, third layer) to route carry lines, transforming a two-dimensional routing problem into a three-dimensional solution. By distributing carry lines across different layers and using vertical connections, the patent reduces horizontal routing complexity in the reduced non-display region.
2Area of stationary object
If the non-display region is reduced, then the display area is increased, but the number of transistors and lines in the non-display region must be minimized to maintain operational efficiency
Solution Approach 1:
The patent extracts and separates the routing of scan lines and carry lines into distinct regions and layers. Scan lines are confined to the first non-display region while carry lines are routed through the second non-display region and multiple layers, removing the constraint of having all lines compete for the same limited space and maintaining efficient signal transmission.
Solution Approach 2:
The patent implements different operating modes (first mode and second mode) that dynamically adjust the phase relationships of clock signals and scan signals. This dynamic signal phase management allows flexible control of pixel operations despite the reduced non-display region, maintaining operational efficiency through adaptive timing rather than increasing physical space.
Data Source
AI summary
A display panel includes: a plurality of pixels; a plurality of scan lines electrically connected to the plurality of pixels; a plurality of stages electrically connected to the plurality of scan lines and arranged along a first direction; and a plurality of carry lines connected to the plurality of stages, wherein: the plurality of stages include a first stage, a second stage, and a third stage; the plurality of carry lines include a first carry line connected to the first stage and the second stage, a second carry line connected to the first stage, the second stage, and the third stage, and a third carry line connected to the second stage and the third stage; and in a region in which the second stage is located, the first carry line and the third carry line do not overlap each other in a second direction intersecting the first direction.