Touch Sensor Electrode Resistance Reduction via Auxiliary Layers
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Solution Overview
Problem
Touch control panels experience increased power consumption due to high electrical resistance in the touch control electrodes, which affects the efficiency of the touch control chip.
Innovation Solution
A touch control layer structure comprising multiple conductive layers with auxiliary electrodes and bridge parts, connected through insulating layers with through-holes, reduces the electrical resistance of the touch control electrodes by increasing the contact area and thickness, thereby lowering power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the touch control driving electrode and touch control sensing electrode are designed with relatively great electrical resistance to increase the number of signals, then the touch sensor can detect more signals, but the power consumption of the touch control chip increases
Solution Approach 1:
The patent introduces a multi-layer conductive structure with first conductive layer, second conductive layer, and third conductive layer arranged in different spatial dimensions. This three-dimensional arrangement allows the electrodes to maintain high electrical resistance in the plane (increasing signal differentiation) while reducing overall resistance through vertical stacking and parallel connection paths, thus resolving the contradiction between signal quality and power consumption.
Solution Approach 2:
The patent merges multiple conductive layers (first, second, and third conductive layers) to form a composite electrode structure. By combining these layers with parallel connection relationships, the overall electrical resistance is reduced while maintaining the signal differentiation capability, thereby decreasing power consumption without sacrificing the number of detectable signals.
2Use of energy by moving object
If auxiliary electrodes are added to reduce electrical resistance, then power consumption decreases, but the structure becomes more complex
Solution Approach 1:
The auxiliary electrodes serve multiple functions simultaneously: they reduce electrical resistance of the touch control electrodes, provide additional signal pathways, and maintain electrical isolation between different electrode types. This multi-functionality reduces the need for separate components, thereby limiting the increase in structural complexity while achieving power consumption reduction.
Solution Approach 2:
The auxiliary electrodes are arranged in a third dimension (vertical stacking with first, second, and third conductive layers) rather than only in the planar dimension. This spatial arrangement allows the structure to remain relatively compact and organized, reducing the perceived complexity despite adding functional elements for resistance reduction.
Data Source
AI summary
A touch control sensor, a display panel, and an electronic device are disclosed. The display panel includes a first conductive layer, a plurality of first auxiliary electrodes, a plurality of bridge parts, and a second conductive layer. The second conductive layer is disposed on a side of the first conductive layer and includes a plurality of first touch control electrodes and a plurality of second touch control electrodes. Each of the first touch control electrodes includes a plurality of first touch control units. Each of the bridge parts is connected between two adjacent first touch control units. Each of the first auxiliary electrodes is parallelly connected to the corresponding first touch control electrode or the corresponding second touch control electrode.