LED Pixel Electrode Sub-Electrodes Light Barrier
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices using light-emitting diodes (LEDs) face limitations in achieving high gradation due to the inability to effectively control and separate light emission from individual sub-LEDs, leading to mixed colors and reduced contrast.
Innovation Solution
The display device incorporates a pixel electrode divided into sub-electrodes with a light-emitting diode (LED) positioned at the boundary of these sub-electrodes, using a light barrier to separate and control light emission from each sub-LED, allowing independent operation and adjustment of light amounts through thin film transistors (TFTs), and includes an optical waveguide layer and shutters for enhanced light extraction and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single LED is used per pixel, then the structure is simple, but the gradation control is insufficient
Solution Approach 1:
The pixel electrode is divided into multiple sub-electrodes (first to nth sub-electrodes) that are spatially separated. Each sub-electrode corresponds to a sub-LED region, enabling independent control of light emission from different parts of the LED structure. This segmentation allows for precise gradation control by selectively activating different sub-electrodes or controlling their individual current levels.
2Device complexity
If light emission from sub-LEDs is not separated, then the structure is simple, but color mixing occurs and contrast is reduced
Solution Approach 1:
The light barrier is positioned at specific locations corresponding to the boundaries between sub-LEDs. This creates localized light management where each sub-LED's emission is confined to its designated region. The light barrier selectively blocks or redirects light in specific local areas, preventing color mixing between adjacent sub-LEDs while maintaining overall structural 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
This configuration enables increased gradation and contrast by allowing precise control over light emission from each sub-LED, improving the overall display quality by allowing for easier adjustment of light amounts and reducing color mixing.
Implementation Method 1
The light barrier may reflect light emitted from the LED
Implementation Method 2
Light-emitting diodes (LEDs) use an electroluminescence phenomenon. An electroluminescence phenomenon is a phenomenon in which light is emitted from a material, such as a semiconductor due to an applied current or voltage
Data Source
AI summary
A display device includes pixels. Each of the plurality of pixels includes a pixel electrode, a light-emitting diode (LED), and an opposite electrode. The pixel electrode is divided into first to nth sub-electrodes. The LED is disposed on a boundary of the first to nth sub-electrodes. The opposite electrode is disposed opposite to the pixel electrode. The LED is disposed between the pixel electrode and the opposite electrode. n is an integer equal to or greater than 2.