See-Through HMD Structure With Side Openings for Cross Reality
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Solution Overview
Problem
Existing head-mounted displays (HMDs) face challenges in providing a cross reality experience without obstructing the user's view of the outside world, limiting viewpoint movement, and increasing size, weight, and cost due to additional display units.
Innovation Solution
A head-mounted display device with a body portion and end portions connected at upper and lower points, allowing an opening for viewing the outside world, cable terminals on end portions to manage external connections, and a design that supports easy handling and reduced size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the size of the display unit is decreased, then the size and weight of the HMD are reduced, but the region that can be visually recognized becomes small and the user feels a sense of blockage
Solution Approach 1:
The HMD is divided into a body portion and separate end portions (handles) that are connected at upper and lower connection portions. This segmentation allows the main body to be compact while the handles extend outward to provide handling functionality without increasing the core display unit size, thus maintaining a small visually recognizable region while reducing overall device weight.
Solution Approach 2:
The end portions are positioned on the right and left sides of the body portion, extending in the horizontal dimension rather than increasing the vertical or depth dimensions. This dimensional arrangement allows the handles to be integrated without significantly increasing the size of the display unit, thereby reducing weight while maintaining adequate visual recognition area.
2Ease of operation
If another display unit is provided on the front surface to display the user's eye image, then communication is improved, but the size, weight, and cost of the HMD increase
Solution Approach 1:
Instead of using a second display unit to show the user's eye image, the invention uses imaging units (cameras) to capture images of the user's eyes and transmits these images to an external device (such as a smartphone or PC) for display. This copying approach eliminates the need for an additional display unit on the HMD, thereby reducing weight, size, and cost while maintaining the communication function.
Solution Approach 2:
An external device serves as an intermediary between the HMD and the user's eyes. The imaging units on the HMD capture the eye images, which are then transmitted through a communication interface to the external device that displays and processes the images. This intermediary approach allows communication functionality without adding weight to the HMD.
3Stability of the object's composition
If the HMD is installed on a fixed stand, then stability is improved, but the change in viewpoint is limited
Solution Approach 1:
The HMD incorporates end portions (handles) that enable the user to hold and move the device freely in three-dimensional space. This dynamic positioning capability allows the user to change viewpoints adaptively while maintaining stability through active holding, replacing the static fixed stand arrangement with a mobile hand-held configuration.
4Ease of operation
If the HMD is used by being worn on the head using a band, then hands-free operation is achieved, but the complexity of mounting and removal increases
Solution Approach 1:
The HMD is designed with a compact body portion that can be easily held in the hand, eliminating the need for head-mounted bands and complex mounting procedures. The segmented design with handles allows simple hand-held operation, reducing mounting complexity while maintaining ease of use through direct manual control.
Data Source
AI summary
A display device according to the present disclosure is a display device used by being disposed in front of eyes of a user, the display device including a body portion in which a display that displays an image on a rear-surface side of the display device is provided, and an end portion positioned on a right side or a left side of the body portion, wherein the end portion is connected to the body portion at an upper connection portion and a lower connection portion so as to form an opening between the body portion and the end portion, and a cable terminal is provided on a side of the end portion opposite to a side of the end portion closer to the body portion.