Organic Light Emitting Display Touch Sensing Electrodes
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Solution Overview
Problem
The manufacturing of organic light emitting display devices with both mirror and touch functions requires an additional process for forming an electrode layer with touch functionality, increasing the manufacturing cost.
Innovation Solution
An organic light emitting display device is designed with a substrate having both a light-emitting region and a reflection region, where a first sensing electrode with a specific reflectivity is disposed in the reflection region, and a second sensing electrode, overlapping with the first sensing electrode, is disposed in both the light-emitting and reflection regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional electrode layer is formed to provide touch function, then the touch sensing capability is improved, but the manufacturing cost increases
Solution Approach 1:
The patent applies multi-functionality by enabling the reflection member to serve dual purposes: providing mirror reflection in the reflection region and enabling touch sensing through integrated sensing electrodes. This eliminates the need for separate touch electrode layers, thereby reducing manufacturing complexity and cost while maintaining reliable touch sensing capability.
Solution Approach 2:
The patent merges the reflection member and touch sensing electrodes into a single integrated structure. The sensing electrodes are formed within or as part of the reflection member, combining the optical reflection function and touch sensing function into one component, thus avoiding additional manufacturing processes and reducing overall device complexity.
2Reliability
If a reflection member is added to provide mirror function, then the mirror function is improved, but the device complexity increases
Solution Approach 1:
The reflection member is designed to perform multiple functions simultaneously: optical reflection for mirror functionality and touch sensing through integrated electrodes. This multi-functional design avoids adding separate components for each function, thereby maintaining device simplicity while achieving both mirror and touch capabilities.
Solution Approach 2:
The patent combines the reflection member and touch sensing electrodes into a single integrated structure, merging two separate functional components into one. This integration reduces the total number of layers and components in the device, simplifying the overall device structure while providing both mirror and touch functions.
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 design allows for the integration of mirror and touch functions without the need for an additional electrode formation process, thereby reducing manufacturing costs and minimizing scattered reflection at the edges of the reflection member.
Implementation Method 1
a first sensing electrode which senses a touch position, is disposed in the reflection region, and comprises a material having a first reflectivity and a second sensing electrode which senses a touch position
Implementation Method 2
comprises a material having a first reflectivity and a second sensing electrode which senses a touch position, is disposed in the light-emitting region and the reflection region, and comprises a material having a second reflectivity
Data Source
AI summary
A organic light emitting display device includes a substrate comprising a light-emitting region and a reflection region, a first sensing electrode which senses a touch position is disposed in the reflection region, and comprises a material having a first reflectivity and a second sensing electrode which senses a touch position is disposed in the light-emitting region and the reflection region, and comprises a material having a second reflectivity, and overlapping a portion of the first sensing electrode.