Double-Sided OLED Display with Semi-Transparent Electrode
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Solution Overview
Problem
Current double-sided OLED screens are thick and have poor touch sensitivity due to the direct lamination method used in their manufacturing, which affects user experience.
Innovation Solution
A double-sided display device is designed with an array substrate, an organic light-emitting functional layer, and a semi-transparent semi-reflective electrode, where light from the organic light-emitting layer penetrates through and is reflected to display on both sides, integrating organic electroluminescence and liquid crystal display technologies, with the organic light-emitting and liquid crystal units arranged on the same layer to reduce thickness and improve touch sense.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two display panels are directly laminated to achieve double-sided display, then double-sided display function is realized, but screen thickness increases and touch sense deteriorates
Solution Approach 1:
The patent merges organic electroluminescence display and liquid crystal display into a single integrated structure. The organic light-emitting layer and liquid crystal layer are disposed on the same side of the array substrate, sharing common electrodes and control circuits. This consolidation eliminates the need for separate display panels, thereby reducing overall screen thickness while maintaining double-sided display functionality.
Solution Approach 2:
The array substrate serves multiple functions: it supports both the organic light-emitting layer for one-sided display and the liquid crystal layer for the other side, and provides shared control circuits for both display modes. This multi-functionality reduces the need for duplicate components, thereby reducing thickness without compromising display capabilities.
2Adaptability or versatility
If two display panels are directly laminated to achieve double-sided display, then double-sided display function is realized, but touch sense deteriorates
Solution Approach 1:
By integrating both display technologies on a single substrate with shared control circuits and electrodes, the patent reduces the number of interfaces and layers that would otherwise interfere with touch sensitivity. The unified structure allows for better touch response compared to laminated separate panels.
3Length of stationary object
If organic light-emitting layer and liquid crystal layer are arranged on the same layer, then screen thickness is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent segments the display into distinct functional layers (organic light-emitting layer, liquid crystal layer, color film substrate) that can be manufactured and assembled in a systematic manner. Each layer has a specific function and can be processed independently to some extent, then integrated together, which manages manufacturing complexity while achieving thin profile.
4Device complexity
If a shared semi-transparent semi-reflective electrode is used for both displays, then device complexity is reduced, but control precision becomes more difficult
Solution Approach 1:
The patent applies local quality by having the semi-transparent semi-reflective electrode perform different functions in different regions or contexts. The electrode can be selectively controlled to serve the organic light-emitting layer or the liquid crystal layer based on local requirements, enabling precise control despite the shared component.
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 realizes a thinner screen with enhanced touch sensitivity by integrating organic electroluminescence and liquid crystal display technologies, eliminating the need for a backlight module and allowing simultaneous control of both displays using a shared electrode, thereby improving user experience.
Implementation Method 1
electrons and holes are injected into an organic light-emitting layer, and different organic light-emitting materials emit different colors of light under an excitation of excitons
Implementation Method 2
the other part of the light is reflected toward the liquid crystal unit by the semi-transparent semi-reflective electrode
Implementation Method 3
the second transparent electrode and the semi-transparent semi-reflective electrode are combined to control a deflection of liquid crystal molecules in the liquid crystal unit
Data Source
AI summary
The present invention provides a double-sided display device and a manufacturing method thereof. The double-sided display includes an array substrate, an organic light-emitting functional layer, and a semi-transparent semi-reflective electrode arranged in sequence, and a liquid crystal cell disposed on a side of the semi-transparent semi-reflective electrode close to the organic light-emitting functional layer. One part of light emitted by the organic light-emitting functional layer penetrates through the semi-transparent semi-reflective electrode to display on one side of the double-sided display device, and the other part of the light is reflected toward the liquid crystal unit by the semi-transparent semi-reflective electrode to display on the other side of the double-sided display.