Gaze-Tracked Sub-Display Driving for Low-Power VR Displays
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Solution Overview
Problem
Display apparatuses used for VR and AR applications face challenges in achieving high display performance with reduced power consumption, particularly when high driving frequencies and reduced sizes are required, and inserting black images between frames can lead to unnaturalness or recognition of black images.
Innovation Solution
The electronic device incorporates a display apparatus divided into sub-display portions, with gaze detection and an arithmetic portion to allocate these sections for different driving frequencies and luminance adjustments, using silicon and oxide semiconductors in transistors, and a luminance conversion circuit to convert image data for reduced luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If display is performed at a high driving frequency to achieve clear moving images, then display quality is improved, but power consumption increases
Solution Approach 1:
The display apparatus is divided into multiple sub-display portions, each capable of independent driving. This segmentation allows different regions to operate at different driving frequencies, enabling high-quality display in critical areas while reducing power consumption in less critical areas.
Solution Approach 2:
Different sub-display portions are assigned different driving frequencies based on their importance or usage patterns. Critical regions maintain high driving frequencies for clear moving images, while non-critical regions use lower frequencies to reduce power consumption, achieving local optimization of both quality and energy efficiency.
2Manufacturing precision
If black image data is inserted between frames to reduce motion blur, then moving image clarity is improved, but unnaturalness or recognition of black images occurs when driving frequency is reduced
Solution Approach 1:
The driving frequency and black image insertion strategy are dynamically adjusted for each sub-display portion based on its specific characteristics and usage. This dynamic adaptation ensures that black image insertion is applied appropriately to achieve motion blur reduction without causing unnaturalness or visible artifacts.
Solution Approach 2:
Different parameters such as driving frequency, black image insertion timing, and luminance conversion are adjusted for different sub-display portions. By changing these parameters locally, the system achieves motion blur reduction in critical areas while maintaining display naturalness in other areas where black image insertion might cause issues.
3Manufacturing precision
If resolution is increased and size is reduced to achieve high display performance, then display quality is improved, but power consumption of the arithmetic circuit increases
Solution Approach 1:
The high-resolution display is segmented into multiple sub-display portions, each processed independently. This segmentation allows the arithmetic circuit to process only the necessary portions at high resolution and detail, reducing overall computational load and power consumption while maintaining high display quality in critical areas.
Solution Approach 2:
Different sub-display portions are assigned different levels of processing quality and resolution based on their importance. Critical regions receive full high-resolution processing, while non-critical regions use lower processing levels, reducing the arithmetic circuit's power consumption while maintaining overall display quality.
Data Source
AI summary
An electronic device with a novel structure is provided. The electronic device includes a display apparatus, a gaze detection portion, and an arithmetic portion. The display apparatus includes a display portion divided into a plurality of sub-display portions and a functional circuit including a luminance conversion circuit. The gaze detection portion has a function of detecting the user's gaze. The arithmetic portion has a function of allocating the plurality of sub-display portions to a first section or a second section with the use of the detection result of the gaze detection portion. The functional circuit has a function of performing display on the sub-display portion included in the first section with a first driving frequency and performing display on the sub-display portion included in the second section with a second driving frequency lower than the first driving frequency. The luminance conversion circuit has a function of converting image data displayed on the second section to image data with reduced luminance to be displayed in the sub-display portion.