Narrow Bezel Display Panel Circuit Structure
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Solution Overview
Problem
Conventional display panels have a large gap between the display portion and the bending portion due to the placement of the demultiplexing circuit, which hinders the achievement of a narrow bezel.
Innovation Solution
The demultiplexing circuit is positioned between the data driving circuit and the bending portion, with signal and power routing portions in separate film layers, allowing the bending portion to be closer to the display portion, reducing the gap and enabling a narrower bezel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the demultiplexing circuit is disposed at the side of the peripheral portion close to the display portion, then the circuit layout is simplified, but the gap between the display portion and bending portion increases
Solution Approach 1:
The patent applies dimensionality change by routing signals through multiple film layers (first film layer and second film layer) instead of placing all circuits in a single plane. The demultiplexing circuit is positioned in the peripheral portion while signal routing portions extend through different layers to connect the display portion to external devices, effectively utilizing the third dimension (vertical stacking) to reduce the horizontal gap between the display portion and bending portion.
Solution Approach 2:
The patent segments the signal transmission path into multiple portions distributed across different film layers. The signal routing portion is divided into first and second signal routing portions located in different layers, allowing the demultiplexing circuit to be positioned optimally in the peripheral portion while maintaining electrical connections through the layered structure, thus reducing the overall gap distance.
2Ease of manufacture
If the bending portion is positioned far from the display portion, then external devices can be accommodated at the back surface, but the bezel width increases
Solution Approach 1:
The patent moves the signal routing from a two-dimensional planar layout to a three-dimensional layered structure. By placing signal routing portions in both first and second film layers, the design accommodates external devices at the back surface while the vertical stacking of routing layers reduces the horizontal bezel width, as the signal paths utilize the vertical dimension rather than extending horizontally.
3Device complexity
If signal routing portions are placed in the same film layer, then the structure is simpler, but signal interference may occur
Solution Approach 1:
The patent eliminates signal interference by separating signal routing portions into different film layers (vertical separation) rather than placing them in the same horizontal plane. The first signal routing portion is in the first film layer and the second signal routing portion is in the second film layer, providing spatial isolation that prevents electromagnetic interference while maintaining a relatively simple overall structure.
Data Source
AI summary
A display panel is provided. The display panel includes a display portion and a peripheral portion, the peripheral portion is provided with a bending portion, a demultiplexing circuit, and a data driving circuit. The data driving circuit is located at a side of the peripheral portion that is away from the display portion, and the demultiplexing circuit is located between the data driving circuit and the bending portion. Thus, the bezel of the display panel can be narrowed.