Active Shutter Head Mounted Display Field of View
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current head-mounted display (HMD) systems provide a limited field of view due to the segregation of 2D images for each eye, which reduces the immersive experience and display resolution when attempting to create a 3D perception.
Innovation Solution
The HMD employs a single display that spans both eyes, with active shutters and lenses that alternately switch between modes to control the visibility of images, allowing both eyes to view the entire display without physical barriers, thereby enhancing the field of view and maintaining full display resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a single display spans both eyes, then the field of view is improved, but image quality deteriorates due to potential mixing of left and right eye images
Solution Approach 1:
The patent implements periodic action by rapidly alternating the visibility of the single display between left eye and right eye through active shutter control. The display shows left eye images during left eye viewing periods and right eye images during right eye viewing periods, creating time-separated visual streams that maintain image quality while expanding field of view when both eyes view simultaneously.
Solution Approach 2:
The system employs dynamic control of the active shutters to adjust which eye can view the display at any given moment. The shutters dynamically switch between transparent and opaque states in synchronization with the displayed content, enabling the single display to serve both eyes sequentially without cross-contamination of images, thus preserving image quality while maximizing field of view utilization.
2Adaptability or versatility
If active shutters are used to control visibility, then the immersive experience is improved, but device complexity increases
Solution Approach 1:
The active shutters serve multiple functions: they control which eye views the display, they enable 3D perception by separating left and right eye images temporally, and they can be synchronized with head tracking to enhance immersion. This multi-functionality justifies the added complexity by delivering superior immersive experience and 3D perception capabilities that simpler systems cannot achieve.
3Manufacturing precision
If images are segregated for each eye, then the 3D perception is maintained, but the field of view is limited
Solution Approach 1:
The patent transitions from spatial segregation of images (separate displays for each eye) to temporal segregation (single display alternating between eyes). By adding the time dimension to image delivery, the system maintains the 3D perception benefit of eye-specific images while eliminating the field of view limitation, allowing each eye to access the entire display area during its active viewing period.
Data Source
AI summary
A head mounted display (HMD) device may include a housing coupled to a frame, and a display disposed in the housing. A first lens and a first active shutter may be disposed along a first optical axis in the housing, and a second lens and a second active shutter may be disposed along a second optical axis in the housing. A controller may alternately switch the display, the first active shutter and the second active shutter between a first mode and a second mode. In the first mode the first active shutter may be activated and the second active shutter may be deactivated. In the second mode the first active shutter may be deactivated and the second active shutter may be activated.