See-Through HMD Visibility Control for Outside Scene and Image Balance
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Solution Overview
Problem
Existing display devices struggle to simultaneously optimize the visibility of both an outside scene and an image displayed, particularly in environments affected by external light, without compromising recognition of the mobile body's position and operation.
Innovation Solution
A display device comprising a display section, a mobile-body-position acquiring section, an operation detecting section, and a display control section that adjusts the visibility of the image based on the mobile body's position and operation, allowing for improved recognition of the mobile body and displayed image by controlling luminance, color tone, and gamma correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display device transmits external light to enable visual recognition of the outside scene, then the visibility of the outside scene is improved, but the visibility of the displayed image deteriorates due to interference from external light
Solution Approach 1:
The patent applies dynamics by making the display control section adjustable and adaptive. The system dynamically changes display parameters (luminance, color tone, gamma correction) based on detected operation states and mobile body positions, allowing the display to adapt its characteristics to different viewing conditions and operational contexts, thereby balancing the visibility of both the outside scene and the displayed image
Solution Approach 2:
The patent directly applies parameter changes by modifying display parameters (luminance, color tone, gamma correction values) based on the mobile body's position and operation state. The control section adjusts these parameters to optimize the balance between outside scene visibility and displayed image visibility, ensuring that the displayed information remains distinguishable while allowing external light transmission
2Loss of information
If the display control section increases the visibility of the displayed image, then the visibility of the image is improved, but the visual recognition of the mobile body in the outside scene deteriorates
Solution Approach 1:
The system uses dynamics by making the display characteristics changeable based on operation detection. The display control section adjusts display parameters dynamically according to the detected operation state and mobile body position, allowing the system to optimize the balance between image visibility and mobile body recognition rather than using fixed display settings
Solution Approach 2:
The patent applies feedback by using the operation detecting section to monitor the operation state and mobile body position, then feeding this information back to the display control section which adjusts the display parameters accordingly. This closed-loop control ensures that the display adapts to maintain both image visibility and accurate mobile body recognition
Data Source
AI summary
An HMD includes an image display section configured to display an image to enable visual recognition of an outside scene by transmitting external light, a mobile-body-position acquiring section configured to acquire a position of a mobile machine, an operation detecting section configured to detect operation, and a display control section configured to cause the image display section to display the image. The display control section executes visibility control processing for controlling, on the basis of the position of the mobile machine acquired by the mobile-body-position acquiring section and the operation detected by the operation detecting section, visibility of the image displayed by the image display section with respect to the external light transmitted through the image display section.