Integrated Touch Screen and OLED Display Thickness Reduction
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Solution Overview
Problem
The integration of a touch screen panel with an organic electroluminescence display apparatus results in increased thickness and degradation of transmittance and color quality due to separate fabrication and layering.
Innovation Solution
An organic electroluminescence display apparatus with an integrated touch screen panel and thin film sealing layer, where the touch screen panel is formed on the same substrate as the organic light emitting layer, and a polarizer is used to improve light propagation and reduce thickness, along with optical adhesives and resin layers for enhanced fabrication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch screen panel is attached to the front surface of an organic electroluminescence display apparatus, then the display can be controlled, but the entire thickness increases and transmittance and colors are degraded
Solution Approach 1:
The patent merges the touch screen panel with the organic electroluminescence display apparatus by forming both on the same substrate. The touch screen panel includes a touch sensor layer integrated with the display structure, eliminating the need for separate attachment and reducing overall thickness while maintaining touch control functionality.
Solution Approach 2:
The substrate serves multiple functions: it supports both the organic electroluminescence display apparatus and the touch screen panel simultaneously. This multi-functional use of the substrate integrates two separate systems into one unified structure, reducing thickness and improving light transmission.
2Ease of operation
If a touch screen panel is attached to the front surface of an organic electroluminescence display apparatus, then the display can be controlled, but transmittance and colors are degraded
Solution Approach 1:
By integrating the touch screen panel with the display apparatus on the same substrate, the patent eliminates additional layers and interfaces that would otherwise block light. This merged structure minimizes light transmission barriers, maintaining high transmittance and color quality while enabling touch control.
3Manufacturing precision
If separate fabrication is used for the organic electroluminescence display apparatus and touch screen panel, then each component can be optimized, but the entire thickness increases
Solution Approach 1:
The patent combines the fabrication processes of the organic electroluminescence display apparatus and touch screen panel into a single integrated manufacturing process. Both components are formed on the same substrate simultaneously, achieving component optimization while reducing overall thickness by eliminating separate assembly.
4Reliability
If a thin film sealing layer is used to seal the organic light emitting layer, then moisture permeation is prevented, but additional layers increase thickness
Solution Approach 1:
The patent employs a thin film sealing layer that provides effective moisture protection for the organic light emitting layer. This thin film structure delivers the necessary reliability and moisture barrier properties while minimizing thickness contribution compared to traditional sealing methods.
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 reduces the overall thickness of the display apparatus while improving visual display quality and fabrication efficiency by integrating the touch screen panel with the substrate and using a thin film sealing layer to prevent moisture permeation and enhance light transmission.
Implementation Method 1
electrons provided from the cathode are combined with holes provided from the anode in the organic light emitting layer to form excitons. The excitons transition from an excited state to a ground state to emit light.
Implementation Method 2
a thin film sealing layer on the organic light emitting layer, the thin film sealing layer being configured to seal the organic light emitting layer
Implementation Method 3
a polarizer disposed on the thin film sealing layer
Implementation Method 4
a first optical adhesive between the touch screen panel and the window layer
Data Source
AI summary
An organic electroluminescence display apparatus includes an organic light emitting layer disposed on a substrate, a thin film sealing layer on the organic light emitting layer, the thin film sealing layer being configured to seal the organic light emitting layer, a polarizer disposed on the thin film sealing layer, a touch screen panel disposed on the polarizer, and a window layer disposed on the touch screen panel.