Display Panel Position Detection Line Layer Separation
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Solution Overview
Problem
In display devices with touch panel functionality using in-cell technology, the increased density of lines on the substrate for improved resolution reduces flexibility in layout design due to the likelihood of position detection lines contacting other lines, such as source and gate lines.
Innovation Solution
The display panel design includes position detection lines disposed in a layer lower than the switching components, with an insulating film crossing the boundary between the display and non-display areas, and a conductive film connecting these lines to terminals, reducing the likelihood of contact with other lines and minimizing the risk of conductive film breaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lines on the substrate is increased to improve display resolution, then the definition of the display panel is improved, but the flexibility in layout design of position detection lines decreases due to increased likelihood of contact with other lines
Solution Approach 1:
The patent applies dimensional separation by routing position detection lines in a different layer than source and gate lines. Specifically, position detection lines are disposed in a first layer while source and gate lines are disposed in a second layer above the first layer, preventing contact while maintaining high line density for improved resolution.
2Device complexity
If position detection lines are routed in the same layer as switching components, then the layout design is simpler, but the likelihood of contact with other lines increases
Solution Approach 1:
The patent separates position detection lines from source and gate lines by placing them in different layers. The position detection lines are in a first layer while source and gate lines are in a second layer, eliminating contact risk while maintaining routing simplicity.
3Device complexity
If an insulating film is not disposed between the terminal and substrate, then the structure is simpler, but the conductive film is more likely to have steps and break
Solution Approach 1:
The patent places an insulating film between the terminal and substrate beforehand to prevent potential conductive film breaks. This insulating film acts as a cushioning layer that eliminates steps, ensuring the conductive film connecting the position detection line to the terminal remains intact and reliable.
Data Source
AI summary
A display panel includes a substrate, pixel electrodes, switching components, an electrode, a line, a terminal, an insulating film, and a conductive film. The switching components are disposed in a layer lower than the pixel electrodes. The electrode is disposed in a layer different from a layer in which the pixel electrodes are disposed. The line includes sections disposed in a layer lower than the switching components in a display area. The terminal is disposed in a layer upper than the line in a non-display area. The insulating film includes a section disposed between the line and the switching components in the display area and a section disposed between the terminal and the substrate in the non-display area. The conductive film is disposed on the insulating film in a layer between the line and the terminal to connect the line to the terminal.