Reflective Electrode Display Device with Segmented Pixel Electrodes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in achieving low power consumption and high display quality, particularly in environments with varying light conditions, as they often require trade-offs between reflective and transmissive display elements.
Innovation Solution
A display device comprising a first display element with a liquid crystal layer, a second display element with a light-emitting layer, and a reflective electrode, where the reflective electrode has an opening for light emission, and a color film positioned between the liquid crystal layer and the reflective electrode, optimized over a substrate with depressions and projections to vary thickness, allowing for efficient light management and improved color purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If a transmissive liquid crystal display device with a surface-emitting light source is used, then power consumption is reduced and display quality is improved, but the device cannot adapt to varying light conditions effectively
Solution Approach 1:
The pixel electrode is divided into a first pixel electrode and a second pixel electrode that are electrically independent. The first pixel electrode controls the liquid crystal layer for reflective display, while the second pixel electrode controls the light-emitting layer for transmissive display. This segmentation allows selective operation of reflective and transmissive modes to adapt to different lighting conditions while maintaining low power consumption.
Solution Approach 2:
Each pixel is equipped with both reflective (first display element) and transmissive (second display element) display elements, enabling the display device to function in multiple modes. The reflective element is used in bright environments to reduce power consumption, while the transmissive element is used in dark environments to ensure visibility, providing universal adaptability across varying light conditions.
2Ease of manufacture
If a color film with uniform thickness is used, then manufacturing is simplified, but color purity and light management efficiency are reduced
Solution Approach 1:
The color film is formed with varying thickness over depressions and projections on the substrate. Thinner regions of the color film are positioned over the second display element (light-emitting layer) to allow efficient light emission, while thicker regions are positioned over the first display element (liquid crystal layer) to enhance color purity. This local variation in film thickness optimizes both color performance and light management without requiring complex manufacturing processes.
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 enables a display device with low power consumption and high display quality by effectively utilizing reflective and transmissive elements, enhancing visibility and color accuracy across different lighting conditions.
Implementation Method 1
The first display element includes a first pixel electrode and a liquid crystal layer
Implementation Method 2
The second display element includes a second pixel electrode and a light-emitting layer
Implementation Method 3
The reflective electrode includes an opening through which light emitted from the light-emitting layer passes
Data Source
AI summary
A novel display device that is highly convenient or reliable. The display device includes a first display element, a second display element, a color film, and a reflective electrode. The first display element includes a first pixel electrode and a liquid crystal layer. The second display element includes a second pixel electrode and a light-emitting layer. The first pixel electrode is electrically connected to the reflective electrode. The reflective electrode includes an opening through which light emitted from the light-emitting layer passes. The color film faces the reflective electrode with the liquid crystal layer placed therebetween.