Integrated Anti-Reflection Layer for Touch Screen Displays
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Solution Overview
Problem
Existing display devices integrated with touch screen panels require separate polarizing plates for anti-reflection, increasing thickness and reducing visibility, and existing touch screen technologies often damage organic light emitting diodes with high-temperature processes or lack flexibility.
Innovation Solution
An anti-reflection layer with alternately laminated metal and dielectric layers, functioning as both an anti-reflection coating and touch screen sensing electrodes, is integrated directly onto the display device, eliminating the need for a separate polarizing plate and using low-temperature metal processes to prevent damage to organic light emitting diodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate polarizing plate is used for anti-reflection, then anti-reflection function is achieved, but device thickness increases
Solution Approach 1:
The patent combines the anti-reflection function and touch screen sensing function into a single integrated structure. The multi-layer film includes both anti-reflection layers (for reducing reflection) and sensing electrode layers (for touch detection) within the same stacked configuration, eliminating the need for a separate polarizing plate while maintaining both functions.
Solution Approach 2:
The multi-layer film structure serves multiple functions simultaneously: it provides anti-reflection properties through alternating high and low refractive index layers, enables touch screen sensing through conductive sensing electrode layers, and maintains optical transparency. This multi-functional integration resolves the contradiction by making one component perform multiple roles.
2Adaptability or versatility
If high-temperature processes are used for touch screen manufacturing, then touch screen functionality is achieved, but organic light emitting diodes are damaged
Solution Approach 1:
The patent changes the temperature parameter of the manufacturing process from high-temperature to low-temperature deposition. The sensing electrode layers and anti-reflection layers are formed using low-temperature vacuum deposition or atomic layer deposition techniques, ensuring that the organic light emitting diodes are not exposed to damaging high temperatures while still achieving functional touch screen capabilities.
3Ease of operation
If metal layers are used for sensing electrodes, then flexibility and image quality are improved, but light transmittance may be reduced
Solution Approach 1:
The patent transitions from planar sensing electrodes to a three-dimensional multi-layer stacked structure. The sensing electrode layers are alternately stacked with anti-reflection layers in the vertical dimension, creating a mesh-like pattern that reduces the blocking area for light while maintaining the conductive pathways needed for touch sensing. This dimensional reorganization allows metal layers to provide flexibility without significantly compromising light transmittance.
Solution Approach 2:
The sensing electrode layers are strategically positioned and patterned within the multi-layer structure to optimize local properties. The metal sensing electrodes are arranged in a mesh pattern with sufficient spacing to maintain light transmittance while providing adequate conductive pathways for touch detection. Different layers have different local densities and patterns to balance electrical functionality and optical transparency.
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 reduces the thickness of the display device, improves visibility by minimizing reflection, and enhances flexibility and image quality by using opaque metal sensing electrodes that do not overlap with pixels, while maintaining effective touch screen functionality.
Implementation Method 1
an anti-reflection layer including a plurality of metal layers and a plurality of dielectric layers, the plurality of metal layers and the plurality of dielectric layers being sequentially laminated on an upper surface of the display device
Implementation Method 2
One or more metal layers among the plurality of metal layers may be sensing electrodes of the touch screen panel
Data Source
AI summary
A display device integrated with a touch screen panel may include a display device and an anti-reflection layer. The display device may include a plurality pixels arranged therein. The anti-reflection layer may include a plurality of metal layers and a plurality of dielectric layers that are sequentially laminated on an upper surface of the display device. In the display device, one or more metal layers among the plurality of metal layers constituting the anti-reflection layer may be operated as sensing electrodes of the touch screen panel.