Touch Panel Destructive Interference Anti-Reflection
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Solution Overview
Problem
Touch panel display devices face challenges with ambient light reflection, which limits their thickness and visibility, especially in outdoor environments, due to the need for circularly polarizing plates that add thickness and complexity.
Innovation Solution
A touch panel incorporating a destructive interference (DI) unit with alternately deposited dielectric and metal layers, along with a transparent conductive layer, which reduces ambient light reflection by causing destructive interference, eliminating the need for a circularly polarizing plate and allowing for a thinner design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a circularly polarizing plate is attached to reduce ambient light reflection, then visibility is improved, but device thickness increases
Solution Approach 1:
The patent extracts and eliminates the circularly polarizing plate from the display device structure by replacing it with a touch panel that has built-in anti-reflection functionality through destructive interference layers, thereby reducing device thickness while maintaining visibility
Solution Approach 2:
The touch panel is designed to perform multiple functions simultaneously: it serves as both the input device and the anti-reflection component through its destructive interference structure, eliminating the need for separate circularly polarizing plates
2Illumination intensity
If a circularly polarizing plate is used to prevent ambient light reflection, then image visibility is improved, but device complexity increases
Solution Approach 1:
The patent merges the anti-reflection function with the touch panel structure by integrating destructive interference layers into the touch panel's existing多层 structure, thereby reducing device complexity by eliminating separate circularly polarizing plate components
Solution Approach 2:
The touch panel serves dual purposes as both the input device and the anti-reflection component through its destructive interference structure, simplifying the overall device structure by eliminating separate components
3Length of stationary object
If the minimum thickness of touch panel and circularly polarizing plate is considered, then device thickness is limited, but portability is reduced
Solution Approach 1:
The patent removes the circularly polarizing plate from the device structure and integrates its anti-reflection function into the touch panel, thereby reducing overall device thickness and improving portability
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 solution effectively reduces ambient light reflection, enabling thinner and more visible display devices without the need for additional polarizing plates, thereby improving image visibility and simplifying the device structure.
Implementation Method 1
a destructive interference (DI) unit configured to include a plurality of dielectric layers and a plurality of metal layers that are alternately deposited
Data Source
AI summary
A touch panel and a display device including the same are disclosed. In one aspect, the touch panel includes a destructive interference (DI) unit including a plurality of dielectric layers and a plurality of metal layers that are alternately stacked and a transparent conductive layer formed over the DI unit. The transparent conductive layer includes a plurality of first sensing patterns and one of the metal layers includes a plurality of second sensing patterns and a plurality of non-sensing metal patterns adjacent to and alternately arranged with the second sensing patterns.