Aperture Display Mode Switching Layer for Glare Reduction
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Solution Overview
Problem
Existing mirror displays with a half-mirror sheet in front of a display device suffer from low luminance due to the half-mirror's low transmittance, and reflective glare from the reflective film, making it difficult to achieve sufficient visibility.
Innovation Solution
A display unit with a pair of substrates, a display layer between them, and a display mode switching layer having apertures for each pixel, allowing switching between mirror and black display modes, which improves light utilization and suppresses glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a half-mirror sheet is arranged in the front side of a display device, then the mirror function is achieved, but the luminance is deteriorated due to low transmittance
Solution Approach 1:
The front surface is divided into multiple regions: transparent regions for light transmission and reflective regions for mirror function. The display mode switching layer is segmented into transparent portions and reflective portions that can be independently controlled, allowing simultaneous achievement of luminance and mirror function in different areas.
Solution Approach 2:
The display mode switching layer can dynamically change its optical properties between transparent and reflective states. By controlling the switching layer's state, the system can adapt between display mode (transparent) and mirror mode (reflective), optimizing performance for different operational requirements.
2Illumination intensity
If a reflective film is provided between the organic EL device and transparent substrate, then the luminance deterioration is improved, but a reflected glare is cast on the mirror surface making images less visible
Solution Approach 1:
The front surface is divided into transparent regions and reflective regions. The display mode switching layer is segmented into transparent portions and reflective portions that can be independently controlled, allowing simultaneous achievement of luminance and mirror function in different areas.
Solution Approach 2:
Different regions of the display device have different optical properties. The transparent regions provide high luminance for image display, while the reflective regions provide mirror function. The display mode switching layer enables local control of optical characteristics to match functional requirements of each region.
3Ease of manufacture
If a half-mirror sheet is used, then the mirror function is achieved, but the visibility is reduced due to reflected glare and luminance deterioration
Solution Approach 1:
The front surface is divided into transparent regions for high visibility display and reflective regions for mirror function. The display mode switching layer is segmented into transparent portions and reflective portions that can be independently controlled, allowing simultaneous achievement of luminance and mirror function in different areas.
Solution Approach 2:
The display mode switching layer can dynamically change its optical properties between transparent and reflective states. By controlling the switching layer's state, the system can adapt between display mode (transparent for high visibility) and mirror mode (reflective), optimizing performance for different operational requirements.
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 visibility by allowing high-definition image display with reduced glare and luminance deterioration, providing a display unit with high visibility in both mirror and display modes.
Implementation Method 1
a display mode switching layer having an aperture for each pixel, and provided between the display layer and the second substrate
Implementation Method 2
extract light that is emitted out of the display layer at the time of displaying images from the apertures
Data Source
AI summary
Provided is a display unit that includes: a pair of a first substrate and a second substrate that are arranged in opposition to each other; a display layer provided between the first substrate and the second substrate; and a display mode switching layer having an aperture for each pixel, and provided between the display layer and the second substrate.