Abstract:
Disclosed herein is a Complementary Metal-Oxide-Silicon (CMOS) image sensor. The image sensor includes a two-dimensional pixel array composed of unit pixels, each unit pixel having a photo diode and transistors, a row decoder located at an end of the pixel array to assign row addresses, and a column decoder located at another end of the pixel array, which is erpendicular to the row decoder, to assign column addresses to corresponding pixels in rows selected by the row decoder. The row decoder allows the integration time points of the unit pixels, which are included in the pixel array, to be identical. Accordingly, the distortion of images can be prevented.
Abstract:
A controlling method of an image sensor is disclosed. The method includes: measuring a first output voltage of a drive transistor, a gate of which is combined to a floating diffusion region, after a predetermined integration time; resetting the floating diffusion region by turning on a reset transistor connected between the floating diffusion region and a power supply group; measuring a reference voltage outputted from the drive transistor; transferring electric charges generated in a photo diode by sensing light inputted from the outside to the floating diffusion region by turning on a transfer transistor connected to the photo diode; and measuring a second output voltage of the drive transistor; wherein an image is generated by using a voltage difference between the first output voltage and the reference voltage, and a voltage difference between the second output voltage and the reference voltage.
Abstract:
Disclosed herein is a Complementary Metal-Oxide-Silicon (CMOS) image sensor The image sensor includes a two-dimensional pixel array composed of unit pixels, each unit pixel having a photo diode and transistors, a row decoder located at an end of the pixel array to assign row addresses, and a column decoder located at another end of the pixel array, which is erpendicular to the row decoder, to assign column addresses to corresponding pixels in rows selected by the row decoder The row decoder allows the integration time points of the unit pixels, which are included in the pixel array, to be identical. Accordingly, the distortion of images can be prevented.
Abstract:
A controlling method of an image sensor is disclosed. The method includes: measuring a first output voltage of a drive transistor, a gate of which is combined to a floating diffusion region, after a predetermined integration time; resetting the floating diffusion region by turning on a reset transistor connected between the floating diffusion region and a power supply group; measuring a reference voltage outputted from the drive transistor; transferring electric charges generated in a photo diode by sensing light inputted from the outside to the floating diffusion region by turning on a transfer transistor connected to the photo diode; and measuring a second output voltage of the drive transistor; wherein an image is generated by using a voltage difference between the first output voltage and the reference voltage, and a voltage difference between the second output voltage and the reference voltage.