Display Touch Electrode Slit Color Overlap
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Solution Overview
Problem
Existing display devices with touch detecting functions face challenges in reducing the visual recognition of slits in dummy electrodes made of conductive materials, which affects the inconspicuousness of the touch detection electrodes.
Innovation Solution
The display device incorporates a substrate with a display area of pixels arranged in a matrix, a touch detection electrode with a first conductive thin wire, a dummy electrode with second conductive thin wires divided by slits, a drive electrode, and a display functional layer. The second conductive thin wires are arranged to have different colors overlap with the slits, reducing visual recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive material such as metal material is used to lower the resistance of the touch detection electrode, then the resistance is reduced, but the light transmittance decreases and the pattern of the touch detection electrode becomes visually recognizable
Solution Approach 1:
The dummy electrode pattern is divided by slits into multiple segments. This segmentation reduces the continuous conductive area while maintaining electrical functionality, thereby reducing light shielding and improving transmittance while keeping the touch detection electrode pattern less visually recognizable
Solution Approach 2:
Different regions of the electrode structure are given different properties: the touch detection electrode uses conductive material for low resistance, while the dummy electrode is slit-divided to provide both electrical function and optical transparency. This local differentiation resolves the contradiction between conductivity and transmittance
2Illumination intensity
If a dummy electrode pattern is arranged between touch detection electrode patterns to reduce visual recognition, then the inconspicuousness is improved, but the device complexity increases due to the need for additional patterns and slit divisions
Solution Approach 1:
The dummy electrode pattern is merged with the touch detection electrode pattern structure, sharing the same base material and manufacturing process. This integration reduces overall device complexity while maintaining the visual recognition reduction benefit
Solution Approach 2:
The dummy electrode serves multiple functions: it provides electrical shielding, maintains capacitance uniformity, and reduces visual recognition of the touch detection electrode pattern. This multi-functionality justifies the added complexity by delivering multiple benefits from a single structural element
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
This configuration effectively reduces the visual recognition of the slits in the dummy electrode, enhancing the inconspicuousness of the touch detection electrodes and improving the overall appearance of the display device.
Implementation Method 1
a touch detection electrode including a first conductive thin wire extending in a first direction on a plane parallel to the surface of the substrate... capable of detecting an external proximity object based on a change in capacitance
Data Source
AI summary
According to an aspect, a display device with a touch detecting function includes: a display area in which pixels each composed of a plurality of color areas are arranged in a matrix; a touch detection electrode including a first conductive thin wire extending in a first direction; and a dummy electrode including a plurality of second conductive thin wires; a drive electrode having capacitance for the touch detection electrode. Each of the second conductive thin wires includes a plurality of thin wire pieces extending in a direction different from the first direction and is divided by a slit between the thin wire pieces. A color area in the display area with which the slit overlaps has a different color from a color area in the display area with which a slit closest to the slit in a second direction orthogonal to the first direction overlaps.