OLED Touch Display Laminated Package for Thinness and Readability
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Solution Overview
Problem
Conventional OLED touch displays face challenges with increased volume and weight due to the incorporation of touch sensor modules, which hinder their application in thin and lightweight electronic devices, especially under bright ambient light conditions where readability is poor.
Innovation Solution
The integration of a laminated package component comprising a quarter-wave plate, a liquid crystal polarizer, and two touch sensor layers in an OLED display device, which cooperatively detect touch events while reducing thickness and weight by eliminating the need for a conventional cover plate and touch sensor module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional touch sensor module is provided on the optical film unit, then touch sense function is provided, but volume and weight of the OLED display are severely increased
Solution Approach 1:
The patent merges the touch sensor function with the optical film unit by integrating the first touch sensor layer into the optical film unit and the second touch sensor layer into the cover plate, creating a unified structure that provides both optical and touch sensing functions without requiring a separate touch sensor module
Solution Approach 2:
The cover plate is designed to serve multiple functions: it acts as both the protective cover plate and the substrate for the second touch sensor layer, while the optical film unit serves as both the optical compensation layer and the substrate for the first touch sensor layer, achieving multi-functionality with reduced components
2Adaptability or versatility
If a conventional touch sensor module is provided on the optical film unit, then touch sense function is provided, but thickness of the OLED display is severely increased
Solution Approach 1:
The patent combines the touch sensing function with the existing optical film unit and cover plate structures, eliminating the need for a separate touch sensor module and thereby reducing the overall thickness of the display device
Solution Approach 2:
The patent uses thin film structures for the touch sensor layers, which are integrated into the optical film unit and cover plate, allowing for flexible and thin touch sensing components that do not significantly increase device thickness
3Illumination intensity
If a conventional polarizer with TAC films is used, then light polarizing function is achieved, but thickness and weight are increased
Solution Approach 1:
The patent changes the structural parameters of the polarizer by eliminating the outer TAC protective films and using only the PVA light polarizing body, which reduces the thickness from tens to hundreds of micrometers to a thinner structure while maintaining the light polarizing 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 enhances the OLED display's readability under bright conditions by absorbing external light and reduces the device's thickness and weight, allowing for more compact and lightweight designs.
Implementation Method 1
a liquid crystal polarizer... to absorb the incident light from the external environment
Implementation Method 2
an optical film unit (not shown) composed of a quarter-wave plate and a polarizer on the transparent cover plate 12 of the OLED display 1 to absorb the incident light
Data Source
AI summary
An OLED touch display device includes an OLED display and a laminated package component covering the OLED display and including a quarter-wave plate, a liquid crystal polarizer, a first touch sensor layer and a second touch sensor layer. The first touch sensor layer and the second touch sensor layer are configured to cooperatively detect touch events.