HMD Display Panel Segmentation for Luminance and Power
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Solution Overview
Problem
In head-mounted display systems, increasing the driving frequency and resolution to enhance display quality can lead to insufficient voltage charging in pixels, resulting in lower luminance and increased power consumption and heat generation.
Innovation Solution
A display apparatus with a multi-channel lens system that divides the display panel into multiple areas, applying different data voltages and controlling light emission in these areas to create a high-frequency visual image, even when the image is displayed at a low frequency on the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the driving frequency and resolution are increased to enhance display quality, then the display quality is improved, but the voltage charging to pixels becomes insufficient and luminance decreases
Solution Approach 1:
The display panel is divided into multiple display areas, each updated at different frame rates. Some areas are updated at high frequency while others at low frequency, allowing high display quality in critical areas without requiring high frequency across the entire panel, thus maintaining luminance while improving display quality where needed.
Solution Approach 2:
The update frequency of different display areas is dynamically adjusted based on the characteristics of the displayed content. Motion-intensive areas receive higher update frequencies while static areas use lower frequencies, optimizing both display quality and luminance performance.
2Measurement precision
If the driving frequency and resolution are increased, then the display quality is improved, but the power consumption and heat generation increase
Solution Approach 1:
The display panel is segmented into multiple areas with different update frequencies. By updating only certain areas at high frequency while maintaining lower frequency in other areas, the overall power consumption is reduced while still providing high display quality in areas where it is most needed.
Solution Approach 2:
The update frequency parameter is changed differently for different display areas based on content requirements. This allows optimization of power consumption by using lower frequencies for static or less critical areas while maintaining high frequencies for motion-intensive or important areas.
3Measurement precision
If the driving frequency is increased, then the display quality is improved, but the voltage charging time is insufficient
Solution Approach 1:
Different display areas are assigned different update frequencies, allowing sufficient voltage charging time in areas with lower update rates while providing high refresh rates in areas where display quality is prioritized. This segmentation enables flexible trade-off between charging time and display quality.
Solution Approach 2:
The display updates are performed periodically with different frequencies for different areas. By using periodic action with varying periods across areas, the system ensures adequate charging time in low-frequency areas while maintaining high display quality in high-frequency areas.
Data Source
AI summary
A display apparatus includes: a display panel; a data driver which applies a first data voltage to a first display area of the display panel during a first frame and applies a second data voltage to a second display area of the display panel during a second frame; and an emission driver which controls an emission of light on the first display area based on the first data voltage during the second frame and an emission of light on the second display area based on the second data voltage during a third frame. An area of a first visual image recognized to a user due to the emission of the light on the first display area is partially overlapped with an area of a second visual image recognized to the user due to the emission of the light on the second display area in a plan view.