Transparent Display Light Control Panel for Black-State Readability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing transparent organic light-emitting display devices face challenges in achieving high transmittance and implementing a completely black color, which affects readability and reduces the effectiveness of the display.
Innovation Solution
A display device incorporating a light control panel with a suspended particle layer and insulating polymer layer, where electrodes are formed of transparent conductive materials, and metal electrodes are patterned to control light transmittance through voltage application, allowing for both light blocking and transmission modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a fixed transparent part is used in the display device, then the user can visually recognize the background, but the readability of the image is reduced and it is difficult to implement a completely black color
Solution Approach 1:
The patent applies a suspended particle layer that can dynamically change its light transmittance properties based on applied voltage. The suspended particles can move between dispersed and aggregated states, allowing the transparent part to switch between high transmittance (for background visibility) and low transmittance (for black color and readability) states, thus resolving the contradiction between maintaining transparency and ensuring image readability
Solution Approach 2:
The patent changes the physical state parameters of the suspended particles by applying voltage. When voltage is applied, the particles aggregate to block light and create black color; when voltage is removed, the particles disperse to allow light transmission. This parameter change enables the same structure to provide both high transmittance for background visibility and low transmittance for image readability and black color implementation
2Illumination intensity
If the transparency of the display device is increased to allow background recognition, then the transmittance is improved, but the ability to implement completely black color is reduced
Solution Approach 1:
The suspended particle layer provides dynamic control over light blocking capability. By applying voltage, the particles aggregate to form light-blocking regions that create completely black colors in the display area, while the transparent part maintains high transmittance for background visibility. This dynamic switching capability allows the system to achieve both high transmittance and complete black color implementation at different times and locations
Solution Approach 2:
The patent segments the display device into distinct functional areas: a pixel area with light-emitting elements that can be controlled to emit light or appear black, and a transmissive area with high transparency for background visibility. The suspended particle layer is selectively positioned to provide light blocking in the pixel area while maintaining transparency in the transmissive area, allowing both functions to coexist without compromising manufacturing simplicity
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 solution enhances transmittance and readability by enabling a completely black color implementation, reduces manufacturing costs, and improves reliability and driving speed with low voltage operation.
Implementation Method 1
The suspended particles may be aggregated around the metal electrode by an electric field formed between the first electrode and the second electrode
Implementation Method 2
An organic light-emitting display device displays an image by using an organic light-emitting diode that generates light by recombination of electrons and holes
Data Source
AI summary
The present disclosure relates to a display device including a pixel portion in which sub-pixels are disposed and at least one transparent portion which is disposed around the pixel portion and transmits external light therethrough, wherein the pixel portion may include first to fourth extension parts which extend in different directions and include wirings, and may include first to fourth circuit parts which are disposed between the adjacent extension parts and include circuit elements of each of the sub-pixels.