Dual-Emission Display Substrate Using Segmented Pixel Structure
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Solution Overview
Problem
Current electroluminescent display apparatuses are limited in their ability to display different images on both surfaces of a single panel, requiring separate panels or inversion methods for dual display, which complicates the configuration and increases complexity.
Innovation Solution
A display apparatus with a single substrate featuring both top and bottom emission capabilities, utilizing thin film transistors and emission layers formed through a solution process, such as inkjet printing, to enable independent driving of sub-pixels for dual emission without additional panels, allowing for simultaneous display on both surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate panels are added to achieve dual display, then display capability in both directions is improved, but device complexity increases
Solution Approach 1:
The display panel is segmented into first sub-pixels configured for top emission and second sub-pixels configured for bottom emission. Each sub-pixel type has dedicated thin film transistors and emission parts, allowing independent control and display on opposite surfaces of the panel without requiring separate panels.
Solution Approach 2:
A single panel structure serves multiple functions by integrating both top-emission and bottom-emission capabilities. The panel can display images in both directions simultaneously or independently, eliminating the need for separate display panels and reducing overall system complexity.
2Adaptability or versatility
If transparent panel with left and right inversion is used, then dual display is achieved, but the ability to display different images on both surfaces is limited
Solution Approach 1:
The panel is divided into distinct first sub-pixels with top-emission emission parts and second sub-pixels with bottom-emission emission parts. This segmentation enables independent driving and control of each sub-pixel type, allowing different images to be displayed on top and bottom surfaces simultaneously without inversion.
Solution Approach 2:
Different regions of the panel have different emission characteristics. The first sub-pixels are optimized for top emission with specific thin film transistor connections, while the second sub-pixels are optimized for bottom emission. This local differentiation enables independent image display on each surface.
3Adaptability or versatility
If emission elements are formed multiple times to achieve dual emission, then display capability is improved, but manufacturing complexity increases
Solution Approach 1:
The formation processes for top-emission and bottom-emission elements are merged into a single integrated manufacturing process. Both emission parts are formed on the same substrate using coordinated thin film transistor fabrication steps, eliminating the need for separate manufacturing processes and reducing overall complexity.
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 simplifies the pixel structure, reduces complexity, and enables large-area printing, allowing for independent control of top and bottom emissions, thereby facilitating dual display on a single panel without the need for separate panels, enhancing display quality and flexibility.
Implementation Method 1
electroluminescent display apparatuses including organic light emitting diode display apparatuses and inorganic light emitting diode display apparatuses
Data Source
AI summary
A display apparatus may include a first substrate including a plurality of first sub-pixels and a plurality of second sub-pixels, a first thin film transistor and a second thin film transistor disposed in a first sub-pixel of the first sub-pixels of the first substrate, a first anode disposed in the first sub-pixel of the first substrate and connected to the first thin film transistor, a second anode disposed in a second sub-pixel of the second sub-pixels of the first substrate and connected to the second thin film transistor, a first emission part disposed on the first anode, a second emission part disposed on the second anode and a cathode disposed on the first emission part and the second emission part.