OLED Display Light Control Unit for Selective Transmission
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Solution Overview
Problem
Existing organic light emitting diode (OLED) displays lack the ability to selectively control light transmission, making them either fully transparent or opaque, which limits their functionality in environments with varying light conditions.
Innovation Solution
The integration of a light control unit, comprising a liquid crystal layer and a transparent electrode, positioned on the substrate to control light transmission through the light transmitting area, allowing the OLED display to switch between transparent and opaque modes based on the liquid crystal's tilt in response to an electric field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a light control unit is added to enable selective light transmission, then the functionality and adaptability of the OLED display are improved, but the device complexity increases
Solution Approach 1:
The light control unit is integrated into the OLED display structure, allowing the same component to serve dual functions: controlling light transmission and maintaining display functionality. This multi-functionality approach enables the display to operate in both transparent and opaque modes without requiring entirely separate systems.
Solution Approach 2:
The light control unit is nested within the layered structure of the OLED display, with components such as the liquid crystal layer and transparent electrode integrated between existing layers (substrate, OLED, encapsulation). This nesting approach minimizes additional complexity by utilizing the existing structural framework.
2Illumination intensity
If the display operates in opaque mode to improve visibility, then the image visibility is enhanced, but the light transmission capability is reduced
Solution Approach 1:
The light control unit dynamically adjusts its state between transparent and opaque modes based on environmental conditions and user needs. The liquid crystal layer can be electrically controlled to tilt and block light when visibility is needed, or return to a flat state to allow light transmission, providing adaptive control rather than a fixed state.
Solution Approach 2:
The optical properties of the display are changed by altering the state of the liquid crystal layer through electrical control. By changing the tilt angle of the liquid crystal molecules, the display transitions between different light transmission states, effectively controlling visibility without permanent structural changes.
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
Enables the OLED display to selectively transmit light, enhancing visibility of the image by interrupting or allowing light transmission depending on external conditions, thus serving as both a transparent and opaque display as needed.
Implementation Method 1
a liquid crystal layer on the passivation layer; and a transparent electrode adjacent the liquid crystal layer and configured to tilt a liquid crystal of the liquid crystal layer
Data Source
AI summary
An organic light emitting diode display includes a substrate including a light transmitting area which is at a display area for displaying an image, and an emission area which is adjacent the light transmitting area, an organic light emitting diode on the substrate at a location corresponding to the emission area; and a light control unit on the substrate at a location corresponding to the light transmitting area and configured to control transmission of light.