Capacitive Touch Display Panel Low Reflection Pattern Layer
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Solution Overview
Problem
Conventional capacitive touch panels with metal bridge lines suffer from visibility issues due to reflectivity, causing bright spots or lines that detract from the user experience and lower the display aperture ratio.
Innovation Solution
A capacitive touch panel design incorporating opaque bridge lines covered by a low reflection pattern layer, transparent electrodes, and an insulating pattern layer, which reduces light reflection without compromising the display aperture ratio, using materials like metal, black resin, or low reflective metal oxides for the bridge lines and electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal bridge lines are used in capacitive touch panels, then electrical conductivity and low impedance are achieved, but reflectivity increases causing bright spots or lines to be visible to users
Solution Approach 1:
An opaque pattern layer is introduced as an intermediary between the metal bridge line and the display surface. This opaque pattern layer serves as a mediator that blocks light reflection from the metal bridge line while allowing electrical signals to pass through, thus eliminating bright spots without compromising electrical conductivity.
Solution Approach 2:
The bridge line structure is divided into functionally distinct regions: the metal bridge line maintains high conductivity in its entirety, while the opaque pattern layer is positioned only in specific areas where light reflection occurs. This local differentiation allows the metal to maintain its electrical function while the opaque layer addresses the optical issue only where needed.
2Object-affected harmful factors
If opaque bridge lines are used to reduce reflectivity, then bright spots are minimized, but display aperture ratio is reduced
Solution Approach 1:
The opaque pattern layer is designed with specific geometric patterns that cover only the necessary areas to block light reflection from the metal bridge line. By localizing the opaque material to specific patterns rather than covering the entire bridge line area, the solution minimizes the impact on display aperture ratio while still effectively reducing reflectivity.
Solution Approach 2:
The opaque pattern layer is segmented into specific patterns corresponding to the metal bridge line configuration. This segmentation allows the opaque material to be positioned precisely where needed to block reflections, while leaving other areas transparent to maintain display aperture ratio.
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 effectively minimizes the visibility of bridge lines, enhancing the user's visual experience by reducing light reflection while maintaining the display's aperture ratio, thus addressing the issue of bright spots or lines caused by metal bridge lines.
Implementation Method 1
The at least one low reflection pattern layer is disposed on a side of the display panel that is opposite to the opaque bridge line... effectively minimizes the visibility of bridge lines, enhancing the user's visual experience by reducing light reflection
Data Source
AI summary
A capacitive touch display panel including a display panel and a capacitive touch device is provided. The capacitive touch device is disposed on a display surface of the display panel. The capacitive touch device includes at least one opaque bridge line and at least one low reflection pattern layer. The opaque bridge line has a first linewidth and two first main borders. The low reflection pattern layer is disposed on a side of the opaque bridge that is opposite to the display panel. The low reflection pattern layer has a second linewidth and two second main borders. The low reflection pattern layer overlaps the opaque bridge line in a vertical projection direction. The first line width is substantially equal to the second line width, and the first main borders are substantial aligned to the second main borders. A capacitive touch panel and a manufacturing method thereof are provided, too.