OLED Display Viewing Angle Optics With Integrated Touch Layers
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Solution Overview
Problem
Existing display devices with viewing angle control elements and touch sensors are structurally complex, limiting thickness reduction and requiring separate manufacturing and lamination, and suffer from moisture and oxygen permeation issues leading to yellowing defects.
Innovation Solution
A display device with integrated viewing angle control elements and touch sensors, utilizing first and second optical members to selectively control viewing angles and minimize luminance differences, while suppressing moisture and oxygen permeation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If viewing angle control elements and touch sensors are manufactured on separate base members and laminated, then viewing angle control function is achieved, but device structure becomes complex and thickness reduction is limited
Solution Approach 1:
The patent combines the viewing angle control element and touch sensor unit into a single integrated structure where the touch sensor unit is formed directly on the display panel. The touch sensor unit includes touch electrodes and control circuits that are manufactured in-situ rather than as a separate component, eliminating the need for lamination and reducing structural complexity while maintaining both viewing angle control and touch sensing functions.
2Adaptability or versatility
If viewing angle control elements and touch sensors are manufactured on separate base members and laminated, then viewing angle control function is achieved, but thickness reduction is limited
Solution Approach 1:
The touch sensor unit is integrated directly onto the display panel in the same manufacturing process, eliminating separate lamination layers and reducing the overall thickness of the display device while maintaining full viewing angle control functionality.
3Productivity
If organic light emitting diodes are used for high luminous efficiency and fast response, then display performance is improved, but moisture and oxygen permeation causes yellowing defects
Solution Approach 1:
The patent employs a multi-layer encapsulation structure comprising inorganic and organic barrier layers that form a composite protective barrier. This composite encapsulation system effectively blocks moisture and oxygen permeation to the OLED, preventing yellowing defects while preserving the high luminous efficiency and fast response characteristics of the organic light emitting diodes.
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 enables selective viewing angle control, reduces safety risks by preventing unwanted content sharing, minimizes luminance differences, and prevents yellowing defects, enhancing display quality and reliability.
Implementation Method 1
a first optical member which is disposed so as to overlap an emission area of the first light emitting diode and provides a viewing angle with a first value; a plurality of second optical members which are disposed so as to overlap an emission area of the second light emitting diode and provides a viewing angle with a second value
Data Source
AI summary
A display device includes a substrate which includes a display area in which a plurality of pixels including a plurality of sub pixels representing different colors is disposed and a non-display area which encloses the display area, a first light emitting diode and a second light emitting diode disposed in each of the plurality of sub pixels, a first optical member which is disposed so as to overlap an emission area of the first light emitting diode and provides a viewing angle with a first value, a plurality of second optical members which are disposed so as to overlap an emission area of the second light emitting diode and provides a viewing angle with a second value which is lower than the first value, and a protective film disposed on the first optical member.