High-Frame-Rate Active Display Multiplexing to Reduce Flicker
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for operating active displays in a time-sliced multiplexed manner result in noticeable flickering and increased black levels, particularly in darker areas, due to the interleaving of different sequences of image data, which affects the viewing experience of direct viewers and the recording of the scenery.
Innovation Solution
A method involving a high display frame rate (HDFR) and time-sliced multiplexed presentation of image data, where a first sequence intended for direct viewers is combined with complementary/inverse sequences, ensuring the time-integrated luminance of the first sequence is higher than the combined luminance of the hidden sequences, and luminance changes occur at frequencies greater than or equal to twice the standard frame rate, minimizing flickering and black level increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sequences of image data are interleaved in a time-sliced multiplexed manner, then the display can support additional image content (e.g., for camera synchronization), but this causes noticeable flickering and increased black levels in the primary image sequence
Solution Approach 1:
The patent applies periodic action by using a high display frame rate (HDFR) that operates periodically at frequencies significantly higher than the standard frame rate. The primary image sequence is displayed in a periodic manner with sufficient duty cycle to maintain stable luminance perception, while additional sequences are inserted in periodic intervals that do not interfere with the primary sequence's temporal stability. This periodic structure eliminates flickering by ensuring the primary sequence maintains consistent temporal characteristics.
Solution Approach 2:
The patent changes the temporal parameters of display operation by introducing a high display frame rate (HDFR) that is significantly higher than the standard frame rate. By adjusting the duty cycle to ensure the primary image sequence occupies sufficient display time, the luminance parameters remain stable. The additional image sequences are displayed during brief intervals that do not significantly alter the overall luminance integration, thus preventing black level increases while maintaining adaptability.
2Adaptability or versatility
If multiple sequences of image data are interleaved in a time-sliced multiplexed manner, then the display can support additional image content, but this increases the black level in darker areas of the primary sequence
Solution Approach 1:
The periodic display structure ensures that the primary image sequence is displayed with sufficient duty cycle at HDFR, maintaining stable time-integrated luminance. The periodic insertion of additional sequences occurs during intervals that do not significantly impact the overall luminance accumulation, particularly in darker areas where the human eye is most sensitive to black level changes.
Solution Approach 2:
By changing the display frame rate parameter to HDFR and carefully controlling the duty cycle allocation, the patent ensures that the time-integrated luminance of the primary sequence remains dominant. This parameter adjustment prevents the black level from increasing in darker areas, as the primary sequence receives sufficient display time to maintain its luminance characteristics.
3Object-affected harmful factors
If the display frame rate is increased to HDFR, then flickering is reduced, but the complexity of synchronizing multiple sequences increases
Solution Approach 1:
The periodic structure of HDFR provides a regular temporal framework that simplifies synchronization. All image sequences are aligned to the periodic HDFR cycles, with the primary sequence displayed in predetermined slots and additional sequences inserted in defined intervals. This periodic organization reduces synchronization complexity compared to arbitrary timing arrangements.
Solution Approach 2:
The patent segments the display time into distinct slots within each HDFR cycle, assigning specific roles to each slot (primary sequence display, additional sequence insertion, etc.). This segmentation of the temporal structure simplifies the coordination of multiple sequences by providing clear temporal boundaries and allocation rules, reducing overall synchronization complexity.
Data Source
AI summary
A method for operating a display comprising providing a first feed of a first sequence of image data and providing a second feed of a second sequence of image data, the second feed comprising a second sequence of image data and a second complementary sequence of image data. The display is operated at a high display frame rate (HDFR) comprising HDFR image slots/slices during a standard frame rate (SFR) time interval. The method includes displaying the first feed and the second feed in a time-sliced multiplexed manner in the HDFR image slots of each SFR time interval. The first feed and the second feed comprise gray images obtained from the combination of image data presented at equal luminance and being evenly distributed within the HDFR image slots so the luminance changes of the display occur at frequencies greater than or equal to twice the SFR.