Imaging Device High-Speed Readout Cycle Control
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Solution Overview
Problem
Recent imaging devices, such as CMOS sensors, face limitations in utilizing high-speed readout within a period shorter than the output cycle of an image, hindering the implementation of new functions.
Innovation Solution
An imaging device with a pixel array unit and a control unit that performs image readout twice or more within a cycle of outputting one image, allowing for improved functionality through high-speed readout, including feature detection and signal processing across multiple images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If image readout is performed only once per output cycle, then the device structure remains simple, but the functionality and image quality improvement opportunities are lost
Solution Approach 1:
The patent divides the image readout process into multiple segments within a single output cycle. Specifically, it performs a first image readout using a first exposure condition and a second image readout using a second exposure condition, then combines these segmented readings to generate the final output image. This segmentation enables multiple functions (standard imaging plus additional image quality enhancements) without requiring completely separate hardware systems.
2Measurement precision
If high-speed readout is performed multiple times within one output cycle, then image quality and functionality improve, but the readout process becomes more complex
Solution Approach 1:
The patent implements dynamic control of the readout process by allowing flexible adjustment of exposure conditions between the first and second readouts. The control unit can dynamically select different exposure conditions based on imaging requirements, and the system can adaptively determine whether to perform one or both readouts within an output cycle. This dynamic approach enables high-speed multiple readouts while maintaining manageable complexity through software-controlled flexibility rather than fixed complex hardware.
3Adaptability or versatility
If multiple image readouts are performed within one output cycle, then new functions become available, but the processing load increases
Solution Approach 1:
The patent performs preliminary actions by completing both the first and second image readouts within the output cycle before final image generation. By preparing multiple image data sets in advance during the readout phase, the system enables various post-processing functions (such as image quality enhancement, noise reduction, and multi-exposure blending) without adding real-time processing complexity during critical output operations. The preliminary readout actions store multiple image versions that can be processed according to different functional requirements.
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
Enables the enhancement of imaging device functions by enabling high-speed readout within a shorter cycle, allowing for the detection and processing of features and generation of output images that cannot be achieved with single-image readout, thereby improving image quality and functionality.
Implementation Method 1
a pixel array unit in which pixels are arranged in a matrix
Data Source
AI summary
The present technology relates to an imaging device, a method of driving the same, and an electronic instrument capable of improving functions by using high-speed readout in a period shorter than the output cycle of an image. An imaging device includes a pixel array unit in which pixels are arranged in a matrix, and a control unit that controls image readout by the pixel array unit. The control unit causes the pixel array unit to perform image readout twice or more within a cycle of outputting one image to the outside. The present technology can be applied to an imaging device or the like including a memory area, for example.