Gaze-Driven Sub-Display Refresh for Low-Power HMD 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 compact designs, necessitating improved power management and heat dissipation.
Innovation Solution
The device incorporates a display apparatus with divided sub-display portions, where the driving frequency varies based on gaze detection, using a gaze detection portion to differentiate regions for optimized power consumption and processing capacity, and employs a layered structure with transistors including oxide semiconductors for reduced power and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display apparatus has high resolution and reduced size, then display quality is improved, but 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 consume less power by activating only necessary regions at high refresh rates while other regions operate at lower rates.
Solution Approach 2:
Different sub-display portions are driven at different frequencies based on local requirements. The first sub-display portion operates at a first driving frequency while the second sub-display portion operates at a second driving frequency, allowing optimization of power consumption according to the specific display needs of each region.
2Productivity
If the arithmetic circuit has high drawing processing capacity, then drawing performance is improved, but device size increases due to heat dissipation mechanism
Solution Approach 1:
The display apparatus is segmented into multiple sub-display portions with independent driver circuits, allowing distributed processing of display data. This reduces the instantaneous processing burden on the arithmetic circuit, enabling high drawing performance without requiring an oversized heat dissipation system.
Solution Approach 2:
Different sub-display portions are driven at different frequencies, with the second sub-display portion operating at a lower second driving frequency. This periodic variation in driving demands allows the arithmetic circuit to process data in manageable cycles, reducing peak heat generation and eliminating the need for large heat dissipation mechanisms.
3Measurement precision
If the display apparatus has high resolution and reduced size, then display quality is improved, but drawing processing capacity becomes insufficient
Solution Approach 1:
The high-resolution display is divided into multiple sub-display portions, each processed by independent driver circuits. This segmentation enables the arithmetic circuit to handle data for smaller regions simultaneously, effectively increasing total drawing processing capacity while maintaining high overall resolution.
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.