Touch-Sensing Liquid Crystal Panel Corner Pad Routing
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Solution Overview
Problem
In current liquid crystal panels, the flexible printed circuit board of the driving circuit overlaps with that of the touch-sensing circuit, affecting the sensing efficacy of the touch-sensing circuit.
Innovation Solution
The touch-sensing liquid crystal panel addresses this by rearranging the positions of contact pads or the conductive patterns in the sensing array to prevent overlap between the driving circuit and touch-sensing circuit flexible printed circuit boards, allowing for alternative placement of contact pads and conductive patterns to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible printed circuit board of the driving circuit is placed in the conventional position, then the connection to the glass substrate is achieved, but the flexible printed circuit board overlaps with that of the touch-sensing circuit, affecting sensing efficacy
Solution Approach 1:
The patent applies dimensionality change by moving the touch-sensing circuit contact pads from the conventional edge region to the corner region of the glass substrate. This spatial reconfiguration in a different dimensional location (corner vs. edge) allows the flexible printed circuit board of the touch-sensing circuit to be routed separately from the driving circuit board, eliminating overlap while maintaining all necessary electrical connections. The corner placement provides an additional spatial dimension for independent routing paths.
2Reliability
If contact pads are rearranged to prevent overlap, then sensing efficacy is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies local quality by concentrating the touch-sensing circuit contact pads specifically in the corner region of the glass substrate, while maintaining conventional edge region placement for other circuits. This localized reconfiguration affects only a specific area (the corner) rather than requiring a complete redesign of all contact pad arrangements. The sensing array conductive patterns are accordingly adjusted locally to connect to these corner-placed contact pads, minimizing the scope of manufacturing changes while achieving the goal of preventing circuit board overlap.
Data Source
AI summary
A touch-sensing liquid crystal panel is provided and includes a color filter substrate and a transistor substrate. The color filter substrate includes a first substrate, a sensing array, touch-sensing circuit contact pads, and color filters. The transistor substrate includes a second substrate and pixel units. In one embodiment, the first substrate has a first edge region and a second edge region having the same width. In another embodiment, the touch-sensing circuit contact pads are disposed at the first edge region and the second edge region of the first substrate, and each conductive pattern in the sensing array is connected to the touch-sensing circuit contact pads of the first edge region and the second edge region. In another embodiment, each conductive pattern of the sensing array includes two first conductive patterns and conductive pattern rows disposed between the first conductive patterns.