Head-Mounted Display Subtitle Reliability via Local Data Storage
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Solution Overview
Problem
Existing head-mounted type display units face issues with displaying subtitles reliably, particularly when signal reception fails, and struggle to adjust image size and language according to the observer's needs, leading to imbalances and suboptimal viewing angles.
Innovation Solution
The method involves a head-mounted type display unit with a frame, an image display apparatus, and control means that store data groups with identification codes, allowing for the selection and display of appropriate data based on designation codes and distance from the observer, enabling reliable image display in various languages and optimal convergence angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If subtitle information is transmitted from a single signal transmission section to multiple head-mounted display units, then bandwidth efficiency is improved, but reliability deteriorates because signal reception may fail for some units
Solution Approach 1:
The system performs preliminary actions by storing multiple sets of subtitle data (including Japanese and English subtitles) locally in the head-mounted display units before transmission. When a signal is transmitted, the receiving units can select and display the appropriate subtitle language based on their pre-stored data, ensuring reliable display even if transmission to some units fails.
Solution Approach 2:
The system changes the parameter of data configuration by organizing subtitle data with identification codes that indicate different languages (Japanese and English). This allows receiving units to select appropriate subtitle languages based on their needs, transforming a single transmission channel into a multi-language support system that improves both reliability and adaptability.
2Adaptability or versatility
If multiple head-mounted display units receive subtitle information simultaneously, then system versatility is improved, but synchronization difficulty increases leading to display timing mismatches
Solution Approach 1:
The system implements feedback mechanisms where each head-mounted display unit transmits its reception status back to the transmission section. This allows the transmission section to monitor which units have successfully received signals and adjust subsequent transmissions accordingly, ensuring synchronized display across multiple units.
Solution Approach 2:
Subtitle data for multiple languages are preliminarily stored in each head-mounted display unit before transmission. This preliminary preparation allows units to independently select and display the appropriate language without requiring complex real-time coordination, thereby maintaining synchronization while supporting multiple languages.
3Device complexity
If image size is fixed in the display apparatus, then device complexity is reduced, but adaptability deteriorates because it cannot adjust to different observation distances
Solution Approach 1:
The display apparatus implements dynamic image size adjustment capability where the image size can be changed based on the observation distance. The system detects the distance between the display unit and the observer's eye, then automatically adjusts the image size to optimize viewing comfort, transforming a static display system into an adaptive one without excessive complexity.
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 solution ensures consistent subtitle display even with failed signal reception, adjusts image size for balanced observation, and provides language-specific content, ensuring a natural viewing experience by optimizing convergence angles based on observer distance.
Implementation Method 1
an optical apparatus or a light guide section 120 to which the parallel light from the collimate optical system 112 is inputted and by and from which the parallel light is guided and outputted. The optical apparatus 120 includes a light guide plate 121 in which light inputted thereto propagates by total reflection until it is outputted therefrom
Implementation Method 2
a collimate optical system 112 for converting light outputted from the pixels of the image forming apparatus 111 into parallel light
Data Source
AI summary
Disclosed herein is an image displaying method for a head-mounted type display unit which includes a frame of the glasses type for being mounted on the head of an observer, an image display apparatus attached to the frame, and a control section for controlling image display of the image display apparatus. The image display apparatus includes an image forming apparatus, and an optical apparatus. The image displaying method includes the steps of: storing a data group configured from a plurality of data in a storage section; adding a data identification code to each of the data; sending a designation identification code and display time information at predetermined intervals of time; and reading out the data whose data identification code coincides with the received designation identification code from the storage section and controlling the image forming apparatus to display an image based on the read out data.