OLED Display Touch Sensor Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing flexible OLED display devices with add-on type touch sensors increase thickness, weight, and manufacturing cost due to their separate structure, which is not integrated with the display device components.
Innovation Solution
A flexible OLED display device with a touch sensor that integrates touch sensing elements into the display device components, using a base layer that serves as a barrier, anti-scratch, or polarization film, and includes inorganic layers and routing wires connected via holes and connectors to reduce thickness and weight, while sharing touch sensing functionality with the display device components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an add-on type touch sensor is used in a flexible OLED display device, then touch sensing functionality is added, but the thickness, weight, and manufacturing cost increase
Solution Approach 1:
The patent combines the touch sensor base layer with existing display device components (barrier layer, anti-scratch layer, or circular polarization layer) into a single integrated structure. This merging eliminates the need for separate touch sensor and display components, reducing overall weight while maintaining touch sensing functionality.
Solution Approach 2:
The base layer serves multiple functions simultaneously: it acts as both the touch sensor substrate and as a barrier/anti-scratch/polarization layer for the display device. This multi-functionality reduces the number of separate components needed, thereby reducing weight without compromising touch sensing capability.
2Adaptability or versatility
If an add-on type touch sensor is used in a flexible OLED display device, then touch sensing functionality is added, but the thickness increases
Solution Approach 1:
The touch sensor base layer is merged with existing display layers (barrier layer, anti-scratch layer, or circular polarization layer), eliminating the need for additional thickness from separate components. The integrated structure maintains touch sensing functionality while minimizing thickness increase.
Solution Approach 2:
The patent uses a thin film structure for the base layer that provides both touch sensing capability and protective functions. This thin film approach enables touch sensing functionality to be added with minimal thickness increase compared to traditional add-on touch sensors.
3Adaptability or versatility
If an add-on type touch sensor is used in a flexible OLED display device, then touch sensing functionality is added, but the manufacturing cost increases
Solution Approach 1:
The patent merges the touch sensor base layer with existing display device layers, allowing both components to be manufactured together in a single production process. This eliminates the need for separate manufacturing and assembly steps, reducing overall manufacturing cost while adding touch sensing functionality.
Solution Approach 2:
The base layer performs multiple functions (touch sensing, barrier protection, anti-scratch, or polarization), eliminating the need to manufacture separate components for each function. This multi-functionality reduces material costs and manufacturing complexity, thereby reducing overall manufacturing cost.
4Reliability
If separate protection films are used to prevent moisture and oxygen permeation, then OLED protection is improved, but device complexity increases
Solution Approach 1:
The base layer simultaneously provides touch sensing functionality and protection against moisture and oxygen (when configured as a barrier layer). This multi-functionality reduces the number of separate layers needed, thereby reducing device complexity while maintaining protection effectiveness.
Solution Approach 2:
The patent combines the touch sensor base layer with the barrier layer function, merging two separate protective functions into a single integrated structure. This reduces the total number of layers from separate protection films, simplifying the overall device structure while maintaining protection against moisture and oxygen.
Data Source
AI summary
An OLED display device having a touch sensor is provided. The touch sensor includes a base layer; a plurality of first touch electrodes arranged in a first direction on a first surface of the base layer; a plurality of second touch electrodes arranged in a second direction crossing the first direction on a second surface of the base layer; a plurality of first routing wires connected to the first touch electrodes on the first surface of the base layer, respectively; a plurality of second routing wires separated from the plurality of first routing wires and formed on the first surface of the base layer; and a plurality of third routing wires connected to the second routing wires respectively via holes, and formed on the second surface of the base layer. The base layer is one of a barrier layer, an anti-scratch layer, and a circular polarization layer.