Organic Light Emitting Display Light Transmission Adjusting Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Transparent organic light emitting display devices suffer from image distortion and degradation in brightness and color due to light scattering from the gaps between thin film transistors and wires, as well as external light interference.
Innovation Solution
The device incorporates a substrate with separate transmitting and pixel regions, thin film transistors, passivation films, pixel electrodes, an organic light emission layer, and a light transmission adjusting layer between electrodes, which includes an electrochromic device to control light transmission and minimize scattering and external light interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the device uses transparent thin film transistors and narrow gaps between patterns, then the device achieves transparency and reduced thickness, but light scattering occurs causing image distortion
Solution Approach 1:
The patent introduces a light transmission adjusting layer as an intermediary component between the substrate and the pixel electrodes. This layer actively modulates the light transmission properties to compensate for the scattering caused by the narrow gaps between transparent thin film transistor patterns, thereby maintaining both transparency and preventing image distortion simultaneously
2Illumination intensity
If the device allows external light to pass through for transparency, then the device achieves viewing capability, but external light interferes with displayed image quality
Solution Approach 1:
The light transmission adjusting layer serves as a mediator that selectively controls external light transmission. It allows sufficient light to pass through for transparency and viewing capability while filtering or modulating the external light to prevent interference with the displayed image's brightness and color coordinates
Solution Approach 2:
The patent employs parameter changes in the light transmission adjusting layer, which can dynamically modify its optical properties (such as transmission ratio, absorption characteristics) to adapt to different operating conditions, thereby maintaining image quality while preserving transparency
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 prevents image distortion and maintains brightness and color accuracy by reducing light scattering and external light interference, enabling a clear and undistorted external view while displaying images.
Implementation Method 1
a light transmission adjusting layer disposed between the first electrode and the second electrode
Data Source
AI summary
An organic light emitting display device that prevents distortion of the image by preventing the transmitting light from scattering, and by preventing the degradation of the brightness and color coordinates caused by external light transmitting through the organic light emitting display device. The device includes a transmitting region and separate pixel regions interposed within the transmitting region; thin film transistors, a passivation film covering each thin film transistor; a pixel electrode that is electrically connected to the corresponding thin film transistor; an opposite electrode that faces the pixel electrode and is able to transmit light; an organic light emission layer that is interposed between the pixel electrode and the opposite electrode; a first electrode formed on a second surface of the substrate; a second electrode facing the first electrode; and a light transmission adjusting layer disposed between the first electrode and the second electrode.