Integrated Common Electrode Touch Sensing for Display Devices
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Solution Overview
Problem
The manufacturing process of display devices with touch sensing functions requires multiple optical masks, increasing costs and complexity.
Innovation Solution
A display device design that reduces the number of optical masks by using a common electrode system with connected common electrode line groups, touch signal lines, and a touch signal processor to determine touch occurrences, allowing for reduced manufacturing costs and improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple optical masks are used in the manufacturing process to provide separate X-axis lines and Y-axis lines, then the touch sensing function can be properly implemented, but the manufacturing cost and process complexity increase
Solution Approach 1:
The patent combines the common electrode and touch sensing electrode into a single integrated structure. The common electrode is divided into multiple common electrode plates that are arranged in a matrix pattern, where each plate serves both as a common electrode for display and as a touch sensing element. This merging eliminates the need for separate touch sensing electrodes and reduces the number of optical masks required in manufacturing.
Solution Approach 2:
The common electrode plates perform multiple functions simultaneously: they serve as common electrodes for the display function and as touch sensing electrodes for touch detection. By making the common electrode multi-functional, the patent eliminates the need for dedicated touch sensing electrodes, thereby reducing manufacturing complexity and cost while maintaining reliable touch sensing capability.
2Reliability
If separate electrodes are provided for common voltage and touch signal transfer, then the touch sensing function can be properly implemented, but the device weight and complexity increase
Solution Approach 1:
The patent merges the common electrode and touch sensing electrode into a single integrated structure. The common electrode is divided into multiple common electrode plates that are arranged in a matrix pattern, where each plate serves both as a common electrode for display and as a touch sensing element. This merging eliminates the need for separate touch sensing electrodes and reduces the number of optical masks required in manufacturing.
Solution Approach 2:
The common electrode plates perform multiple functions simultaneously: they serve as common electrodes for the display function and as touch sensing electrodes for touch detection. By making the common electrode multi-functional, the patent eliminates the need for dedicated touch sensing electrodes, thereby reducing manufacturing complexity and cost while maintaining reliable touch sensing capability.
3Reliability
If multiple optical masks are used in the manufacturing process, then the touch sensing function can be properly implemented, but the device thickness increases
Solution Approach 1:
The patent combines the common electrode and touch sensing electrode into a single integrated structure. The common electrode is divided into multiple common electrode plates that are arranged in a matrix pattern, where each plate serves both as a common electrode for display and as a touch sensing element. This merging eliminates the need for separate touch sensing electrodes and reduces the number of optical masks required in manufacturing.
Solution Approach 2:
The common electrode plates perform multiple functions simultaneously: they serve as common electrodes for the display function and as touch sensing electrodes for touch detection. By making the common electrode multi-functional, the patent eliminates the need for dedicated touch sensing electrodes, thereby reducing manufacturing complexity and cost while maintaining reliable touch sensing capability.
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 results in a display device with reduced manufacturing costs, lighter weight, thinner thickness, lower power consumption, and effective touch sensing functionality without the need for separate electrodes for signal transfer.
Implementation Method 1
the electro-optical active layer converts the data signal to an optical signal to display an image
Implementation Method 2
The touch sensing function is to find touch information such as whether a touch by an object occurs a screen, a location of the touch, or the like by sensing changes in pressure, charges, light, or the like applied to a screen
Data Source
AI summary
A display device includes: a first substrate; a plurality of pixel electrodes disposed on the first substrate; a common electrode including a plurality of common electrode plates disposed on the first substrate, where the common electrode plates cover the pixel electrodes and are arranged substantially in a matrix form; and a plurality of common electrode line groups which applies a common voltage to the common electrode plates, in which laterally adjacent common electrode plates of the common electrode plates are connected to different common electrode line groups.