Gaze-Adaptive Sub-Display Refresh for Lower-Power Head-Mounted Displays
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Solution Overview
Problem
HMD-type electronic devices face challenges with high power consumption, increased size, and reduced drawing processing capacity due to high-resolution displays and integrated arithmetic circuits, which are exacerbated by the need for heat dissipation mechanisms.
Innovation Solution
The electronic device incorporates a display apparatus with divided sub-display portions, where the driving frequency is adjusted based on gaze detection, with a lower frequency applied to regions outside the user's gaze point, utilizing oxide semiconductors and organic EL elements, and separates arithmetic processing from control signals to reduce power consumption and circuit size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display apparatus has high resolution and reduced size, then the display quality and immersion are improved, but the power consumption increases
Solution Approach 1:
The display apparatus is divided into multiple sub-display portions, each driven by independent driver circuits. This segmentation allows different regions to be driven at different frequencies, enabling the high-resolution display to be maintained while reducing overall power consumption by lowering the refresh rate in non-critical regions.
Solution Approach 2:
Different driving frequencies are applied to different sub-display portions based on their importance. The region corresponding to the user's gaze point is driven at a higher frequency to maintain high quality, while other regions use lower frequencies to reduce power consumption, achieving local optimization of display quality versus energy consumption.
2Productivity
If the arithmetic circuit has high drawing processing capacity, then the response to user motion and gaze is improved, but the device size increases due to heat dissipation mechanisms
Solution Approach 1:
The arithmetic circuit is divided into multiple independent processing units, each capable of handling specific drawing tasks. This segmentation allows the system to achieve high overall processing capacity without requiring a single large, heat-generating processor, thereby reducing the need for extensive heat dissipation mechanisms.
Solution Approach 2:
The system dynamically adjusts the operating frequency of different sub-display portions based on real-time gaze detection and motion data. This dynamic adaptation allows the arithmetic circuit to process only the necessary data at high speed, reducing overall computational load and heat generation while maintaining high drawing processing capacity when needed.
3Measurement precision
If the functional circuit drives the high-resolution display, then the display quality is improved, but the drawing processing capacity becomes insufficient
Solution Approach 1:
The display is segmented into multiple sub-display portions with different driving requirements. The functional circuit can allocate more processing resources to critical regions (such as the gaze point area) while using simpler driving schemes for less critical regions, thereby maintaining high overall display resolution while preserving sufficient drawing processing capacity.
Solution Approach 2:
The system changes the driving frequency parameter of different sub-display portions based on their importance and the user's gaze position. By lowering the frequency in non-critical regions, the functional circuit can maintain high resolution where needed while reducing the overall processing burden, thus preserving drawing processing capacity for other tasks.
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 approach reduces power consumption, device size, and enhances drawing processing capacity while maintaining high resolution and immersion, offering a novel electronic device design.
Implementation Method 1
The display apparatus includes a plurality of pixel circuits and a plurality of light-emitting elements. The light-emitting elements include organic EL elements.
Data Source
AI summary
A novel electronic device is provided. The electronic device includes a display apparatus, an arithmetic portion, and a gaze detection portion, and the display apparatus includes a functional circuit and a display portion divided into a plurality of sub-display portions. The gaze detection portion has a function of detecting a user's gaze. The arithmetic portion has a function of dividing the plurality of sub-display portions between a first section and a second section using a detection result of the gaze detection portion. The first section includes a region overlapping with a user's gaze point. The functional circuit has a function of making a driving frequency of the second section lower than a driving frequency of the first section.