Virtual Image Display Device with Integrated Visibility Adjustment
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Solution Overview
Problem
Existing virtual image display devices that require visibility adjustment, such as glasses, increase in size and weight when used with head-mounted displays, limiting design flexibility and user comfort.
Innovation Solution
A virtual image display device with a signal-light modulating unit, scanning optical system, and visibility adjusting member, where the visibility adjusting member is positioned further outward than the virtual-image forming member, allowing parallel observation of image light and external light, and including a semitransparent film for see-through configuration, integrated design, and optional eye-width adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a device for forming a virtual image is used in addition to glasses for visibility adjustment, then visibility adjustment for observing external light is enabled, but the size of the device increases
Solution Approach 1:
The patent combines the virtual image display device and the visibility adjusting member (glasses) into a single integrated device. The visibility adjusting member is positioned to be located further on the outer side than the virtual-image forming member, allowing both functions to coexist in one compact unit rather than requiring separate devices to be worn simultaneously.
2Ease of operation
If a device for forming a virtual image is used in addition to glasses for visibility adjustment, then visibility adjustment for observing external light is enabled, but the weight of the device increases
Solution Approach 1:
The patent combines the virtual image display device and the visibility adjusting member (glasses) into a single integrated device. The visibility adjusting member is positioned to be located further on the outer side than the virtual-image forming member, allowing both functions to coexist in one compact unit rather than requiring separate devices to be worn simultaneously.
3Ease of operation
If a device for forming a virtual image is used in addition to glasses for visibility adjustment, then visibility adjustment for observing external light is enabled, but design freedom is limited
Solution Approach 1:
The patent combines the virtual image display device and the visibility adjusting member (glasses) into a single integrated device. The visibility adjusting member is positioned to be located further on the outer side than the virtual-image forming member, allowing both functions to coexist in one compact unit rather than requiring separate devices to be worn simultaneously.
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 visibility adjustment without increasing the device's size, reduces weight and bulk, and enhances design freedom, allowing users to observe virtual and external images in a clear, superimposed state without additional visibility correction devices.
Implementation Method 1
a semitransparent film configured to receive the scanning light emitted from the scanning optical system to form a virtual image, allow external light to pass, and enable observation of the virtual image by the scanning light and observation of the external light
Implementation Method 2
a scanning optical system configured to scan the signal light made incident from the signal-light modulating unit to thereby emit the signal light as scanning light
Data Source
AI summary
Image lights formed by a light emitting device and a virtual-image forming member and external light transmitted through a visibility adjusting member and the virtual-image forming member can be observed in parallel in a see-through manner. In the observation of the external light, the visibility adjusting member enables visibility adjustment corresponding to the eyesight of a wearer. Therefore, the wearer can observe the external light without wearing a device for visibility adjustment such as glasses. Therefore, it is possible to suppress an increase in the size of a virtual image display device.