公开(公告)号：US10721427B2

公开(公告)日：2020-07-21

申请号：US16018015

申请日：2018-06-25

Applicant: PrimeSensor Technology Inc.

Inventor： Shiue-Shin Liu

IPC: H04N5/378 ,  H04N5/369 ,  H03K4/08 ,  H03M1/56

Abstract: The present invention discloses an image sensor circuit and a ramp signal generator thereof. The image sensor circuit includes: an active pixel sensor (APS) array which includes plural pixel circuits arranged in an array of columns and rows; plural slope analog-to-digital converter (ADC), wherein each of the slope ADC is coupled to the corresponding column, and generates a digital sampling signal according to a ramp signal together with a pixel signal including a reset signal and a image signal which are generated by the pixel circuit located in the selected row and in the column corresponding to the slope ADC; and the ramp signal generator, which generates the ramp signal, wherein the ramp signal generator includes an active integrator, and the active integrator generates the ramp signal by charging an integration capacitor with a gain current.

公开(公告)号：US20200128190A1

公开(公告)日：2020-04-23

申请号：US16163525

申请日：2018-10-17

Applicant: PRIMESENSOR TECHNOLOGY INC.

Inventor： Wen-Han Yao ,  Chih-Huan Wu

IPC: H04N5/243 ,  H04N5/235

Abstract: An image sensing method, comprising: (a) controlling an image sensor to apply a first frame rate to sense a first frame during a first frame period; (b) determining exposure variation in the first frame period; and (c) during one of the first frame period and a second frame period following the first frame period, switching the image sensor to apply a second frame rate different from the first frame rate to sense at least one third frame, when the step (b) determines the exposure variation exceeds a threshold level. A related image sensing system is also disclosed. Via such image sensing method, the frame switch delay of a conventional frame switch can be reduced.