Imaging Device Display Cycle Segmentation for Reduced Delay
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Solution Overview
Problem
Imaging devices face challenges in minimizing display delay when performing high-speed imaging operations, as existing configurations require excessive transmission bandwidth and power due to mismatched image sensor and display cycles, leading to difficulties in minimizing display delay despite preparation completion.
Innovation Solution
The imaging device incorporates an image sensor and a display with a second display scanning period shorter than the first display scanning period, allowing for efficient image data generation and display synchronization, minimizing display delay by adjusting the timing of display processes based on line progress information and using a margin period to absorb delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the display cycle is set to N times the sensor cycle to reduce bandwidth and power consumption, then power consumption and transmission bandwidth are reduced, but display delay increases due to the longer display cycle
Solution Approach 1:
The display cycle is segmented into a first display scanning period (for preparing display data) and a second display scanning period (for actually displaying the image). The second period is shorter than the first period by a margin period, allowing the system to prepare data during the longer first period and display during the shorter second period, thus reducing display delay while maintaining reduced power consumption benefits
Solution Approach 2:
Image data is prepared in advance during the first display scanning period before the actual display occurs in the second period. This preliminary preparation allows the display to start sooner in the second period, reducing the effective display delay while the system operates at the lower N-times sensor cycle rate
2Reliability
If a large margin is set for display delay to ensure preparation completion, then reliability of display timing is improved, but display delay cannot be minimized
Solution Approach 1:
The display timing is made dynamic by using two different scanning period lengths within one display cycle. The first display scanning period is longer to ensure reliable preparation completion, while the second display scanning period is shorter to minimize actual display delay. This dynamic timing structure allows the system to achieve both reliability and minimal delay
3Loss of time
If the display scanning period is shortened to reduce display delay, then display delay is reduced, but the margin for absorbing processing delays is reduced
Solution Approach 1:
The display cycle is divided into two scanning periods with different lengths. The first display scanning period is longer and serves as the preparation phase with built-in margin for absorbing processing delays. The second display scanning period is shorter and serves as the actual display phase, minimizing display delay. The segmentation allows each phase to be optimized for its specific function
Data Source
AI summary
An imaging device includes an image sensor that performs imaging operations at intervals of a predetermined sensor cycle, an image data generator that generates image data based on output data from the image sensor, and a display that displays an image represented by the image data within a second display scanning period whose length is shorter than a first display scanning period corresponding to a display cycle that is N times the sensor cycle (N being an integer larger than or equal to “2”) by a margin period.