Display Driver Layout With Equal-Length Lines for Uniform Settling
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Solution Overview
Problem
The increasing size of display panels necessitates more driving devices, leading to issues such as conductive line length variations causing delay and electrical short-circuits, which complicates high-speed and low-power consumption requirements.
Innovation Solution
A driving device layout is optimized with equal-length conductive lines in a zigzag or serpentine shape, minimizing line length and resistance/capacitance components, and reducing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display panel size is increased, then the display area is improved, but the conductive line length varies causing delay and electrical short-circuits
Solution Approach 1:
The patent introduces a dummy conductive line in a third dimension (vertically above the substrate) to equalize the total conductive line length. The dummy conductive line extends from the switching element to a terminal, with its projection on the substrate overlapping with the pixel area. This vertical dimension allows adding length without increasing the planar footprint, thus equalizing signal transmission paths without causing electrical short-circuits between adjacent conductive lines.
Solution Approach 2:
The dummy conductive line is positioned vertically above the substrate, with its projection overlapping the pixel area. This nesting approach allows the dummy conductive line to be embedded within the existing pixel structure without occupying additional lateral space, effectively adding conductive path length while maintaining compact layout and avoiding interference with adjacent conductive lines.
2Stability of the object's composition
If the conductive line length is equalized, then the voltage settling time is uniform, but the device complexity increases
Solution Approach 1:
The patent applies local quality by adding the dummy conductive line only in specific regions where length equalization is needed. The dummy conductive line is selectively positioned above certain pixels based on their specific conductive line length requirements, rather than uniformly applying the same structure across the entire display panel. This localized approach achieves voltage settling time uniformity while minimizing overall device complexity.
3Reliability
If the switching element is positioned farther from the side portion, then the electrical short-circuit risk is reduced, but the conductive line length increases causing delay
Solution Approach 1:
The patent resolves this contradiction by extending the conductive line into the vertical dimension. The dummy conductive line rises vertically above the substrate, allowing additional length to be added without increasing the horizontal distance from the side portion. This maintains the switching element's safe positioning while compensating for signal transmission delay through the vertical path extension.
Data Source
AI summary
A driving device and a display device are discussed. The driving device can include a first pad region having a plurality of terminals, a first switching region having a plurality of switches, and a first driving region having a plurality of driving circuits. The first switching region is located between the first pad region and the first driving region. Each switch of the plurality of switches is connected to each terminal of the plurality of terminals to provide a connection between a single switch and a single terminal.