公开(公告)号：US20060187328A1

公开(公告)日：2006-08-24

申请号：US11360729

申请日：2006-02-23

Applicant: Su-hun Lim

Inventor： Su-hun Lim

IPC: H04N5/335

CPC classification number: H04N5/347 ,  H01L27/14621 ,  H01L27/14643

Abstract: Provided are a CMOS image sensor (CIS) type image sensing device for averaging and sub-sampling analog image signals at a variable sub-sampling rate and a method of driving the same. The image sensing device includes: a two-dimensional active pixel sensor (APS) array including pixels arranged in rows and columns; an averaging unit averages reset signals and image signals alternately generated from each of pixels corresponding to odd- numbered and even-numbered rows and columns in based on a predetermined sub-sampling rate in a sub-sampling mode by repeating a method of accumulating, averaging, (and dumping) the reset signals and the image signals, and generating a comparison signal corresponding to a difference between the average of the reset signals and the average of the image signals; and a conventional digital signal output circuit that generates digital signals corresponding to the sub-sampled (averaged) image signals generated from the pixels represented by the comparison signal. The CIS type image sensing device can analog-average image signals output from pixels at a variable sub-sampling rate and carry out a sub-sampling operations for moving pictures, without increasing chip size.

公开(公告)号：US20060170803A1

公开(公告)日：2006-08-03

申请号：US11328591

申请日：2006-01-10

Applicant: Su-Hun Lim

Inventor： Su-Hun Lim

IPC: H04N5/335

CPC classification number: H04N5/335 ,  H04N5/243 ,  H04N5/3598 ,  H04N5/378

Abstract: A column analog-to-digital (ADC) circuit for preventing a sun black effect in a CMOS image sensor (CIS) is provided. The ADC circuit includes: a comparator having a signal voltage input port and a reference voltage input port, comparing a reset voltage output from one of a plurality of CIS pixels with a reference voltage in a reset sampling period, and outputting an overflow sensing signal when the reset voltage is lower than the reference voltage; and a digital converter converting the output of the comparator into digital data, wherein the digital converter comprises a first latch storing the overflow sensing signal and outputting a flag signal indicating an overflow in response to the overflow sensing signal in a signal sampling period, when the overflow sensing signal is output from the comparator in a first portion of the reset sampling period.

Abstract translation: 提供了一种用于防止CMOS图像传感器（CIS）中的日光黑影响的列模数（ADC）电路。 该ADC电路包括：具有信号电压输入端口和参考电压输入端口的比较器，将来自多个CIS像素中的一个输出的复位电压与复位采样周期中的参考电压进行比较，并且当输出溢出检测信号时， 复位电压低于参考电压; 以及将所述比较器的输出转换为数字数据的数字转换器，其中所述数字转换器包括存储所述溢出检测信号的第一锁存器，并且在所述信号采样周期中响应于所述溢出检测信号输出指示溢出的标志信号， 溢出检测信号在复位采样周期的第一部分从比较器输出。

公开(公告)号：US20050280730A1

公开(公告)日：2005-12-22

申请号：US11157461

申请日：2005-06-21

Applicant: Su-hun Lim ,  Tetsuo Asaba

Inventor： Su-hun Lim ,  Tetsuo Asaba

IPC: H04N3/14 ,  H04N5/21 ,  H04N5/335 ,  H04N5/341 ,  H04N5/353 ,  H04N5/357 ,  H04N5/363 ,  H04N5/374 ,  H04N5/378 ,  H04N9/07 ,  H04N5/217

CPC classification number: H04N5/347

Abstract: Provided are an improved solid-state image-sensing device for averaging sub-sampled analog signals and a method for driving the same. The solid-state image-sensing device receives a video signal from each pixel column and converts the video signal into a digital signal while a switch for averaging is turned off when the solid-state image-sensing device captures a still image. When the solid-state image-sensing device photographs a moving picture, one of two CDS circuits receives a signal corresponding to an average of video signals of columns having the same color pixel and converts the signal into a digital signal using the switch turned on.

Abstract translation: 提供了用于平均次采样模拟信号的改进的固态图像感测装置及其驱动方法。 固态图像感测装置从固体摄像装置捕获静止图像时，从每个像素列接收视频信号，并将该视频信号转换为数字信号，同时关闭平均开关。 当固态图像感测装置拍摄运动图像时，两个CDS电路中的一个接收与具有相同颜色像素的列的视频信号的平均值相对应的信号，并且使用打开的开关将该信号转换为数字信号。