See-Through OLED Pixel Light Guide and Transparency
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Solution Overview
Problem
Existing organic EL display devices face challenges in maintaining display intensity while providing non-light-emission regions, as the inclusion of non-translucent electrodes in pixels can lead to reduced light emission.
Innovation Solution
The display device incorporates a pixel structure with both light-emission and non-light-emission regions, where the light-emission region includes effective light-emitting parts with a stacked configuration of electrodes and a light guide for enhanced light extraction, and the non-light-emission region allows for background transparency without compromising display intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If non-translucent electrodes are disposed in partial regions of pixels to create non-light-emission regions, then background transparency is achieved, but display intensity is lowered
Solution Approach 1:
The pixel is divided into light-emission regions and non-light-emission regions, with each region having distinct electrode configurations. The non-light-emission regions contain non-translucent electrodes for background transparency, while light-emission regions maintain translucent electrodes for light output, resolving the contradiction through spatial segmentation of functional regions.
Solution Approach 2:
Different electrode transparency properties are applied to different regions within the pixel. Non-translucent electrodes are used specifically in non-light-emission regions to achieve background transparency, while translucent electrodes are maintained in light-emission regions to preserve display intensity, implementing local quality differentiation.
2Adaptability or versatility
If non-light-emission regions are provided in pixels, then see-through display functionality is achieved, but the number of pixels must be reduced which decreases definition
Solution Approach 1:
The patent introduces a spatial dimension differentiation within each pixel by creating distinct light-emission and non-light-emission regions. This allows see-through functionality to be achieved within the existing pixel grid without reducing pixel count, maintaining definition while adding functional dimensionality through regional differentiation.
Solution Approach 2:
Each pixel is designed to serve multiple functions simultaneously: light-emission regions provide display output while non-light-emission regions provide background transparency. This multi-functionality allows the display to operate in both standard and see-through modes without sacrificing pixel density or definition.
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 maintains or enhances display intensity by guiding light from the light-emitting parts and providing background transparency, enabling a see-through display without reducing the number of pixels, thus avoiding decreased definition.
Implementation Method 1
a light guide provided on side of the one or more effective light-emitting parts on which light is extracted
Data Source
AI summary
A display device includes a pixel including a plurality of sub-pixels. Each of the plurality of sub-pixels includes: a light-emission region; and a non-light-emission region other than the light-emission region. The light-emission region includes one or more effective light-emitting parts in which a first electrode, a light emitting layer, and a second electrode are stacked in order, and a light guide provided on side of the one or more effective light-emitting parts on which light is extracted.