Dual-Layer Display Combining Reflective and Transmissive Elements
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Solution Overview
Problem
Display devices face challenges in maintaining visibility under strong outdoor light due to external light reflection, and they lack adequate visibility under low-intensity external light, necessitating a solution that combines reflective and transmissive display elements for optimal performance.
Innovation Solution
A display device comprising a first substrate with a reflective display element and a second substrate with a light-emitting display element, where the second substrate includes an anti-reflection layer and a driver circuit connected through a flexible printed circuit, allowing for efficient light management and power conservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transmissive liquid crystal element with backlight is used, then visibility under low-intensity external light is improved, but power consumption increases
Solution Approach 1:
The display system is segmented into two functional elements: a transmissive element for low-light visibility and a reflective element for power-saving operation. The transmissive element with backlight is activated only when ambient light is insufficient, while the reflective element handles normal lighting conditions, thereby reducing overall power consumption while maintaining visibility under low-intensity light when needed.
2Use of energy by moving object
If a reflective liquid crystal element is used, then power consumption is reduced, but visibility under strong external light deteriorates due to surface reflection
Solution Approach 1:
The display device uses a reflective display element optimized for power efficiency in strong light conditions, while a separate transmissive display element with backlight handles low-light conditions. This segmentation allows the system to maintain low power consumption during daytime operation while providing adequate visibility when ambient light is insufficient, resolving the trade-off between power consumption and visibility across different lighting environments.
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 provides high visibility under strong light conditions while reducing power consumption and enhancing visibility under low-intensity light, achieving a balance between reflective and transmissive display functionalities.
Implementation Method 1
A second surface of the second substrate opposite to the first surface of the second substrate is provided with an anti-reflection layer
Data Source
AI summary
A display device that has an excellent visibility even under strong light is provided. In the display device, a first display element that reflects visible light and a second display element that emits visible light are between a first substrate and a second substrate. The display device can display an image with high visibility by operating the first display element under strong light and operating the second display element under weak light. Furthermore, a first surface of the second substrate is provided with a touch sensor, and a second surface opposite to the first surface is provided with an anti-reflection layer. Such a structure can sufficiently reduce reflection of external light on the display surface under strong light, further increasing the visibility.