公开(公告)号：US10165650B1

公开(公告)日：2018-12-25

申请号：US15681941

申请日：2017-08-21

Applicant: Cree, Inc.

Inventor： Paul Fini ,  Ronald W. Bessems

IPC: H05B37/02

Abstract: A lighting fixture has a communication interface; a light source configured to provide light output for general illumination; an image sensor configured to capture image information associated of with a field of view; and control circuitry, which is configured to provide a drive signal to the light source to control the light output. In one embodiment, the control circuitry is further configured to, for each object in the field of view, determine if an object in the field of view is an occupant based on the image information; if the object is an occupant, track movement of the occupant within the field of view; and determine a number of occupants in the field of view. The control circuitry may also be configured to provide occupancy information bearing on the number of occupants in the field of view to a remote entity via the communication interface.

公开(公告)号：US20180225834A1

公开(公告)日：2018-08-09

申请号：US15887096

申请日：2018-02-02

Applicant: Cree, Inc.

Inventor： Sten Heikman ,  Yuvaraj Dora ,  Ronald W. Bessems ,  John Roberts ,  Robert D. Underwood

IPC: G06T7/246

CPC classification number: G06T7/248 ,  G06K9/00771 ,  G06K9/2036 ,  G06K9/4628 ,  G06K9/6274 ,  G06T7/254 ,  G06T2207/20021 ,  H05B37/0227

Abstract: A method includes the steps of obtaining a frame from an image sensor, the frame comprising a number of pixel values, detecting a change in a first subset of the pixel values, detecting a change in the second subset of the pixel values near the first subset of the pixel values, and determining an occupancy state based on a relationship between the change in the first subset of the pixel values and the second subset of the pixel values. The occupancy state may be determined to be occupied when the change in the first subset of the pixel values is in a first direction and the change in the second subset of the pixel values is in a second direction opposite the first direction.

公开(公告)号：US20200065572A1

公开(公告)日：2020-02-27

申请号：US16108975

申请日：2018-08-22

Applicant: Cree, Inc.

Inventor： John Roberts ,  Ronald W. Bessems ,  Robert Bowser

IPC: G06K9/00 ,  H04N5/345

Abstract: An image sensor includes an active pixel array including a number of pixels and image sensor control circuitry configured to perform a read operation only on a subset of the pixels of the active pixel array such that pixels not in the subset remain inactive. By reading out only the subset of pixels in the active pixel array and keeping the remaining pixels inactive, the temperature of the active pixel array may be reduced compared to a conventional read out process, thereby reducing thermal noise in the resulting pixel data.