IMAGE SENSOR AND OPERATING METHOD THEREOF

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IMAGE SENSOR AND OPERATING METHOD THEREOF - A simplified explanation of the abstract

This abstract first appeared for US patent application 18495020 titled 'IMAGE SENSOR AND OPERATING METHOD THEREOF

The abstract describes an image sensor with multiple photodiodes, storage capacitors, overflow transistors, and read circuits. The sensor can output various sub-output signals by converting electric charges generated by the photodiodes during exposure periods with different conversion gains.

The image sensor includes a pixel with first and second photodiodes, a storage capacitor, an overflow transistor, and a read circuit.
The pixel can output first and second sub-output signals obtained by converting electric charges generated by the first photodiode during an exposure period with different conversion gains.
It can also output reset signals corresponding to the sub-output signals, as well as sub-output signals obtained from the second photodiode with different conversion gains.
The sensor can convert electric charges stored in the storage capacitor during the exposure period with specific conversion gains to produce additional sub-output signals.

Potential Applications: - This technology can be used in digital cameras, smartphones, and other imaging devices to improve image quality and dynamic range. - It can also be applied in medical imaging equipment for enhanced diagnostic capabilities.

Problems Solved: - Enhances the performance of image sensors by providing multiple sub-output signals with different conversion gains. - Improves the overall image quality and dynamic range of captured images.

Benefits: - Increased flexibility in adjusting conversion gains for different types of scenes. - Enhanced image quality and dynamic range in various lighting conditions.

Commercial Applications: Title: Advanced Image Sensor Technology for Enhanced Image Quality This technology can be commercialized in the consumer electronics industry for digital cameras, smartphones, and other imaging devices. It can also find applications in the medical imaging sector for improved diagnostic imaging capabilities.

Questions about Image Sensor Technology: 1. How does the use of multiple photodiodes in the image sensor improve image quality? - The use of multiple photodiodes allows for capturing different levels of light and optimizing conversion gains for each, resulting in enhanced image quality. 2. What are the potential challenges in implementing this advanced image sensor technology in commercial products? - Some challenges may include cost-effectiveness, integration with existing systems, and ensuring compatibility with different imaging devices.

Original Abstract Submitted

An image sensor includes a pixel having first and second photodiodes, a storage capacitor, an overflow transistor, and a read circuit. The pixel is configured to output a first sub-output signal obtained by converting electric charge generated by the first photodiode during an exposure period with first conversion gain, output a second sub-output signal obtained by converting the electric charge generated by the first photodiode during the exposure period with second conversion gain, output a first reset signal corresponding to the first sub-output signal and a second reset signal corresponding to the second sub-output signal, output a third sub-output signal, which is obtained by converting a portion of electric charge generated by the second photodiode during the exposure period with third conversion gain, output a fourth sub-output signal, obtained by converting the electric charge generated by the second photodiode and stored in the storage capacitor during the exposure period, with fourth conversion gain, and output a third reset signal corresponding to the third sub-output signal and a fourth reset signal corresponding to the fourth sub-output signal.