Imaging Apparatus Rolling Readout Display Timing
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Solution Overview
Problem
In imaging systems using the global shutter method, there is a delay in displaying captured images, which can result in the subject being lost before it is visible on the display surface, especially when the subject is not at the top of the image, increasing the risk of missing the desired image.
Innovation Solution
An imaging apparatus and method that employs a rolling readout drive to sequentially read out pixel signals from the imaging surface, with a display controller initiating a drawing update process before the rolling readout drive starts, ensuring that the image is displayed rapidly by updating the image from one end of the display surface to the other, allowing for immediate confirmation of the subject's presence on the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a global shutter drive is used to simultaneously expose all pixels, then imaging quality for moving subjects is improved, but display delay increases causing the subject to be lost before it is visible on the display surface
Solution Approach 1:
The display controller initiates the drawing update process before the rolling readout drive completes reading all pixel signals. By starting the display update in advance (preliminary action), the system overlaps the display preparation with the ongoing readout process, thereby reducing the perceived display delay while maintaining global shutter imaging quality
Solution Approach 2:
The patent segments the image display process by updating display pixel rows in sequence from one end of the display surface to the other, rather than waiting for complete image readout. This segmentation allows partial image data to be displayed progressively, reducing the overall display delay
2Ease of manufacture
If pixel signals are read out sequentially from the top of the imaging surface, then the display process is simplified, but subjects not located at the top of the image are delayed in appearing on the display
Solution Approach 1:
The display controller performs preliminary actions by initiating the drawing update process before the rolling readout drive finishes. This timing adjustment ensures that the display process starts in advance, compensating for the sequential readout delay and allowing subjects to appear sooner on the display surface
Solution Approach 2:
The system dynamically adjusts the timing relationship between the rolling readout drive and the drawing update process. By making the display update timing flexible and initiating it at an optimal moment before readout completion, the system optimizes subject visibility timing while maintaining the simplicity of sequential readout
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables rapid display of essential image portions, reducing the risk of losing the subject by ensuring that the main subject can be instantly confirmed on the display surface after imaging, even if it is not initially at the top of the image.
Implementation Method 1
a plurality of pixels including a photoelectric conversion element and an electric charge holder which holds an electric charge transferred from the photoelectric conversion element
Data Source
AI summary
An imaging apparatus includes: an imager as defined herein; an imaging controller as defined herein; and a display controller as defined herein, the imaging controller performs, as the rolling readout drive, a first rolling readout drive as defined herein, the display controller performs a start instruction of the drawing update process to the display device, prior to a start timing of the first rolling readout drive based on the start timing, and a drawing update timing, at which the start instruction is performed, is a timing that the update timing of the image drawn in the display pixel row corresponding to the specific one of the pixel rows in the drawing update process started by the start instruction becomes a timing after a predetermined time from the start timing of the first rolling readout drive is elapsed.