Mirror Display System Depth Alignment
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Solution Overview
Problem
Conventional mirror displays cause uncomfortable feelings due to mismatched perceptions of mirror images and video images, as the focal point and convergence angle for viewing the mirror image differ significantly from those for viewing the video image, leading to an uncomfortable experience, especially in applications like virtual fitting of glasses or clothes.
Innovation Solution
A mirror display system incorporating a 3D display device and a half mirror plate, where the 3D display device displays a pair of video images with parallax, allowing the fused video image to be perceived on the back surface side behind the display surface, thereby aligning the mirror image and video image at the same depth, using a control unit to supply the necessary video signal for optimal parallax.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional 2D liquid crystal display device is used as a mirror display, then the device can function as both a mirror and a display, but the mirror image and video image are perceived at different depths causing uncomfortable feeling
Solution Approach 1:
The patent changes the optical parameters of the display system by introducing a 3D display device that can control the depth position of the video image. By adjusting the video image display position to match the mirror image depth, the system resolves the depth mismatch problem while maintaining dual mirror and display functionality
Solution Approach 2:
The patent uses a half mirror plate as an intermediary optical element that allows both the mirror reflection and the display output to coexist in the same space. This intermediary component enables the video image and mirror image to be superimposed at the same depth position, eliminating the uncomfortable feeling caused by depth disparity
2Ease of operation
If the viewer stands close to the mirror display to align the depths of mirror image and video image, then the depths can be matched, but this is impractical for applications like virtual fitting of glasses or clothes
Solution Approach 1:
Instead of changing the viewer's position, the patent changes the video image display parameters by using a 3D display device to adjust the video image depth to match the mirror image depth at the viewer's normal viewing distance. This allows depth alignment without requiring the viewer to stand close to the display
Solution Approach 2:
The patent transitions from 2D display to 3D display, adding the depth dimension control capability. This allows the video image to be positioned at the same depth as the mirror image, enabling practical applications like virtual fitting at comfortable viewing distances
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 simultaneous perception of the mirror image and video image without uncomfortable feelings, allowing viewers to comfortably use the system without needing to stand close, enhancing practicality in applications like virtual fitting.
Implementation Method 1
a mirror display includes a half mirror plate provided on the front surface of a display device so that the display device can function as a mirror. The mirror display provides video images owing to display light emitted from the display device and is also usable as a mirror by reflecting external light.
Implementation Method 2
the 3D display device displays, by the video signal, a video image for the left eye and a video image for the right eye that give a parallax on a display surface of the 3D display device, the parallax being set such that a fused video image of the video image for the left eye and the video image for the right eye is perceived on the back surface side behind the display surface
Data Source
AI summary
A mirror display system that enables simultaneous perception of a mirror image and a video image with suppressed uncomfortable feeling includes a half mirror plate including a half mirror layer; a 3D display device; and a control unit being configured to supply a video signal to the 3D display device. The 3D display device is disposed on the back surface side of the half mirror plate and is configured to display, by the video signal, a video image for the left eye and a video image for the right eye that give a parallax on a display surface of the 3D display device. The parallax is set such that a fused video image of the video image for the left eye and the video image for the right eye is perceived on the back surface side behind the display surface of the 3D display device.