公开(公告)号：US10057516B2

公开(公告)日：2018-08-21

申请号：US15152322

申请日：2016-05-11

Applicant: PIXART IMAGING INC.

Inventor： Mei-Chao Yeh

IPC: H04N5/353 ,  H04N5/374 ,  H04N5/235 ,  H04N5/3745

CPC classification number: H04N5/3532 ,  H04N5/2353 ,  H04N5/3745 ,  H04N5/378

Abstract: The present disclosure illustrates an image sensor. The image sensor includes an image sensing array and a voltage supply array. The image sensing array and the voltage supply array are coupled to an analog-to-digital converter array. The image sensing array captures image data. The image sensing array supports one of a rolling shutter mechanism and a global shutter mechanism according to setting. The voltage supply array includes a plurality of voltage supply circuits to supply dummy voltage. During an auto-zero period, the voltage supply array provides the dummy voltage to the analog-to-digital converter array. Pluralities of comparators of the analog-to-digital converter array execute an auto-zero function based on the dummy voltage. After finishing the auto-zero function, the image sensing array outputs the image data to the analog-to-digital converter array. The analog-to-digital converter array makes the image data be digital.

公开(公告)号：US09961338B2

公开(公告)日：2018-05-01

申请号：US15051678

申请日：2016-02-24

Applicant: PixArt Imaging Inc.

Inventor： Chien-Jung Chou ,  Mei-Chao Yeh ,  Wen-Cheng Yen

IPC: H04N5/217 ,  H04N17/00 ,  H04N5/365 ,  H04N5/3745

CPC classification number: H04N17/002 ,  H04N5/3655 ,  H04N5/3658 ,  H04N5/3745

Abstract: A method for reducing fixed pattern noise of an image sensor is provided. The method includes: accessing pixel data of at least one test frame in a test environment; and calculating/deriving average values of each column based on at least one portion of pixel data of the column in the at least one test frame, wherein the average values of columns are used as calibration values for calibrating image pixel data of columns when the image sensor operates in a normal light source environment.

公开(公告)号：US20170026596A1

公开(公告)日：2017-01-26

申请号：US15051678

申请日：2016-02-24

Applicant: PixArt Imaging Inc.

Inventor： Chien-Jung Chou ,  Mei-Chao Yeh ,  Wen-Cheng Yen

IPC: H04N5/365 ,  H04N17/00

CPC classification number: H04N17/002 ,  H04N5/3655 ,  H04N5/3658 ,  H04N5/3745

Abstract: A method for reducing fixed pattern noise of an image sensor is provided. The method includes: accessing pixel data of at least one test frame in a test environment; and calculating/deriving average values of each column based on at least one portion of pixel data of the column in the at least one test frame, wherein the average values of columns are used as calibration values for calibrating image pixel data of columns when the image sensor operates in a normal light source environment.

Abstract translation: 提供了一种用于降低图像传感器的固定图案噪声的方法。 该方法包括：在测试环境中访问至少一个测试帧的像素数据; 以及基于所述至少一个测试帧中的所述列的像素数据的至少一部分来计算/导出每列的平均值，其中，所述列的平均值用作校准所述列的图像像素数据的校准值 传感器在正常的光源环境中工作。