OLED Pixel Structure with Reflection Layer for Light Recycling
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Solution Overview
Problem
In most AMOLED transparent display technologies, light is emitted on both sides, leading to inefficient utilization of the light source and a high percentage of unused light, and blank windows in the display panel reduce the effective utilization of the display panel.
Innovation Solution
An OLED pixel structure is introduced, featuring a thin film transistor with a driving electrode that extends to form a reflection layer, allowing light to be reflected back and improving source utilization, and a transmission region for displaying background images, reducing the area of blank windows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light is emitted in double-side manner in AMOLED transparent display, then transparent display effect is achieved, but light source utilization is reduced
Solution Approach 1:
The pixel structure is segmented into two distinct regions: a transmission region for transparent display and a reflection region for light recycling. This segmentation allows different portions of the pixel to serve different functions, enabling both transparent display effect and improved light source utilization simultaneously.
Solution Approach 2:
Instead of discarding the light emitted from the bottom side of the OLED device, the patent recovers this light by introducing a reflection layer that redirects the emitted light back through the OLED structure. This transforms wasted light into useful illumination, improving overall light source utilization while maintaining transparent display capabilities.
2Ease of manufacture
If blank windows are provided in OLED display panel, then transparent display is realized, but display panel utilization is reduced
Solution Approach 1:
Different regions of the pixel structure are assigned different optical properties: the transmission region maintains high transparency for background display, while the reflection region is designed with reflective characteristics for light recycling. This local differentiation allows each region to optimize its specific function while contributing to overall panel utilization.
Solution Approach 2:
The pixel structure achieves multi-functionality by combining both transmission and reflection capabilities within the same pixel. The transmission region provides transparent display function, while the reflection region simultaneously recycles light, allowing the display panel to serve multiple purposes and improve overall utilization without requiring separate blank windows.
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 OLED pixel structure enhances light source utilization and reduces blank windows, resulting in improved display panel efficiency and effective transparent display capabilities.
Implementation Method 1
the pattern of the metal electrode (the gate or the drain) of the thin film transistor for driving the OLED device is extended so as to serve as the reflection layer of the pixel structure, such that a part of light from the OLED device can be reflected back to the anode to be reused
Data Source
AI summary
The present invention belongs to the technical field of display, and specifically relates to an OLED pixel structure and an OLED display device. The OLED pixel structure comprises a thin film transistor and an OLED device, the thin film transistor being provided with a driving electrode for controlling whether the OLED device emits light or not, wherein the pixel structure comprises a transmission region and a reflection region in which a reflection layer formed by extending the driving electrode is provided. The beneficial advantages are that the OLED pixel structure can effectively improve the utilization of the light source and the utilization of the display panel.