Touch Panel Third Conductive Film Parasitic Capacitance
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Solution Overview
Problem
Current touch panels face challenges in providing a balance between convenience and reliability, particularly in terms of reducing eye strain caused by changing display positions and managing parasitic capacitance in touch sensors.
Innovation Solution
A touch panel design incorporating a base with a light-transmitting property, a display element overlapping with the base, and a sensor element with conductive films and an insulating film, where the sensor element includes a liquid crystal layer and transistors with semiconductor films containing indium, gallium, and zinc, allowing for efficient positional data sensing and image data control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch sensor is added to a display device to enable touch input functionality, then the convenience of the device is improved, but parasitic capacitance increases which reduces reliability
Solution Approach 1:
The patent combines the touch sensor electrode and display electrode into a single conductive film structure. The third conductive film serves dual purposes as both the touch sensor electrode for detecting touch input and the display electrode for controlling liquid crystal alignment, thereby eliminating the need for separate electrodes and reducing parasitic capacitance.
Solution Approach 2:
The third conductive film is designed to perform multiple functions simultaneously: it acts as the touch sensor electrode for sensing user input, the display electrode for liquid crystal control, and provides electrical connection to the transistor. This multi-functionality reduces the overall number of components and minimizes parasitic capacitance in the system.
2Measurement precision
If the sensor element is positioned between the display element and base, then positional data sensing accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges the sensor element and display element into a single integrated structure where the third conductive film serves as both the touch sensor electrode and display electrode. This integration maintains accurate positional sensing while reducing structural complexity compared to separate sensor and display layers.
Solution Approach 2:
The third conductive film performs multiple functions within a single layer: it detects touch position accurately, controls liquid crystal alignment for display, and provides electrical connection. This multi-functionality achieves precise measurement without requiring additional complex layers or components.
3Measurement precision
If multiple conductive films are used in the sensor element for accurate sensing, then measurement precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines multiple electrode functions into a single third conductive film, eliminating the need for multiple separate conductive films. This simplification maintains sensing accuracy while significantly reducing manufacturing complexity and the number of fabrication steps required.
Solution Approach 2:
The third conductive film is designed to perform multiple sensing and display functions simultaneously, achieving accurate measurement with a single conductive layer rather than requiring multiple layers. This reduces the number of manufacturing steps and simplifies the production process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a novel touch panel with enhanced convenience and reliability by reducing eye strain through accurate positional data sensing and minimizing parasitic capacitance, resulting in an eye-friendly display experience.
Implementation Method 1
The sensor element is configured to sense an object which approaches or touches the base side... includes a first conductive film, a second conductive film between the first conductive film and the base
Implementation Method 2
The third conductive film is provided so that an electric field for controlling the alignment of the liquid crystal material contained in the layer can be applied between the first conductive film and the third conductive film
Data Source
AI summary
Provided is a novel touch panel that is highly convenience or reliable, a novel data processor that is highly convenient or reliable, a novel touch panel, a novel data processor, or a novel semiconductor device. The touch panel includes a sensor element and a display element. The sensor element includes a first conductive film and a second conductive film. The display element includes a layer containing a liquid crystal material and a third conductive film which is provided so that an electric field controlling the alignment of the liquid crystal material contained in the layer can be applied between the first conductive film and the third conductive film.