公开(公告)号：US11050956B2

公开(公告)日：2021-06-29

申请号：US16368967

申请日：2019-03-29

Applicant: PIXART IMAGING INC.

Inventor： Wooi-Kip Lim

IPC: H04N5/357 ,  H04N5/355 ,  H01L27/146 ,  H04N5/369 ,  H04N5/351

Abstract: An image sensor includes a transistor, at least one storage capacitor and a voltage provider. The at least one storage capacitor is connected to the transistor. The voltage provider is electrically connected to the transistor and configured to provide an extra voltage for the at least one storage capacitor. The extra voltage is variable in response to images with different brightness. The image sensor includes the voltage provider to provide extra voltage to increase the charging capacity of the storage capacitor. The Signal-Noise-Ratio of the image sensor won't be affected and the fill factor is able to be maintained at a certain level.

公开(公告)号：US10359312B2

公开(公告)日：2019-07-23

申请号：US15687772

申请日：2017-08-28

Applicant: PIXART IMAGING INC.

Inventor： Wooi-Kip Lim ,  Han-Chi Liu

IPC: G06F3/0354 ,  G01J1/46 ,  G05F1/56 ,  G06F3/038 ,  H04N5/355 ,  H04N5/359 ,  H02M3/156

Abstract: A device, for pixel transfer rate boosting, is provided and includes an image sensing array having a plurality of pixel units, in which each of the plurality of pixel units is configured to generate a pixel signal when receiving an electromagnetic energy, a signal buffer circuit, electrically coupled with the image sensing array to receive the pixel signals, a switch circuit electrically coupled with the signal buffer circuit, a capacitor having a first terminal and a second terminal, in which the first terminal electrically couples with the switch circuit and the second terminal connects to a ground, a comparator, electrically coupled with the switch circuit, and a pull-down unit, electrically coupled with the first terminal of the capacitor and the switch circuit. After the switch circuit is turned on, the pull-down unit pulls the plurality of pixel output signals down.

公开(公告)号：US10268314B2

公开(公告)日：2019-04-23

申请号：US15470055

申请日：2017-03-27

Applicant: PIXART IMAGING INC.

Inventor： Wooi-Kip Lim

IPC: G06F3/041 ,  G06F3/044

Abstract: A signal processing circuit of a touch device including an operational amplifier, a feedback resistor and a step current circuit is provided. The feedback resistor connects between a negative input and an output terminal of the operational amplifier. The step current circuit is coupled to the negative input of the operational amplifier and configured to provide or draw a step current to reduce the current flowing through the feedback resistor so as to compensate the voltage offset of the operational amplifier.