Organic Light Emitting Display Touch Panel Thickness Reduction
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Solution Overview
Problem
The integration of a touch panel function into organic light emitting display devices increases their thickness due to the addition of a touch panel and polarizing plate, compromising their slim form factor.
Innovation Solution
Incorporating a touch panel with a polarizing function into the organic light emitting display device by using a layered structure with indium tin oxide (ITO) transparent conductive layers and a polarizing plate, which includes a retardation film, adhesive layer, and linear polarizer, to eliminate the need for additional polarizing films and reduce thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch panel and polarizing plate are added to an organic light emitting display device, then the touch panel function is achieved, but the device thickness increases
Solution Approach 1:
The patent combines the polarizing function and touch panel function into a single integrated structure. The touch panel includes a lower resistive layer formed by the first transparent conductive layer and sealing substrate, and an upper resistive layer formed by the second transparent conductive layer and polarizing plate. This merging eliminates the need for a separate polarizing plate, thereby achieving the touch panel function while preventing excessive thickness increase.
Solution Approach 2:
The touch panel structure serves multiple functions simultaneously: it provides touch input capability through the resistive layers, and it provides polarization function through the polarizing plate integrated into the second film. This multi-functionality allows the device to achieve both touch panel operation and light polarization without requiring separate components, thus controlling overall thickness.
2Adaptability or versatility
If a separate polarizing plate is added to achieve polarization, then polarization function is achieved, but device complexity and thickness increase
Solution Approach 1:
The polarizing function is merged into the touch panel structure itself. The second film includes both the polarizing plate and the second transparent conductive layer, which together form the upper resistive layer of the touch panel. This integration eliminates the need for a separate polarizing plate structure, thereby reducing device complexity while maintaining the polarization function.
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 configuration allows for a thinner organic light emitting display device with a built-in polarizing function, reducing overall thickness and enhancing user convenience without the need for extra polarizing films.
Implementation Method 1
a polarizing plate spaced from the first film and on the first resistive layer... configured for polarizing light
Implementation Method 2
The first transparent conductive layer and the second transparent conductive layer include indium tin oxide (ITO)
Implementation Method 3
an organic light emitting unit on the substrate... Organic light emitting display devices including a light emission layer formed of an organic material
Data Source
AI summary
An organic light emitting display device includes: a substrate; an organic light emitting unit on the substrate; a sealing substrate sealing the organic light emitting unit; and a touch panel on the sealing substrate, and configured for polarizing light, wherein the touch panel includes a first film on the sealing substrate and a second film spaced from the first film and on the first resistive layer.