Invention Grant
- Patent Title: Avalanche diode based object detection device
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Application No.: US16129804Application Date: 2018-09-13
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Publication No.: US11353563B2Publication Date: 2022-06-07
- Inventor: Tso-Sheng Tsai
- Applicant: PixArt Imaging Inc.
- Applicant Address: TW Hsin-Chu County
- Assignee: PixArt Imaging Inc.
- Current Assignee: PixArt Imaging Inc.
- Current Assignee Address: TW Hsin-Chu County
- Agency: Hauptman Ham, LLP
- Main IPC: G01S7/487
- IPC: G01S7/487 ; G01S7/4865 ; G01S17/04

Abstract:
There is provided an object detection device including a light source, an avalanche diode, a first counter, a second counter and a processor. The light source emits light within a first interval, and is turned off within a second interval, a third interval and a fourth interval. The avalanche diode detects photons corresponding to the first interval, second, third and fourth intervals to trigger avalanche events. The first counter performs up-counting on the avalanche events in the first interval and performs down-counting on the avalanche events in the third interval to generate a first count value. The second counter performs up-counting on the avalanche events in the second interval and performs down-counting on the avalanche events in the fourth interval to generate a second count value. The processor calculates a time-of-flight according to the first count value and the second count value.
Public/Granted literature
- US20200088843A1 AVALANCHE DIODE BASED OBJECT DETECTION DEVICE Public/Granted day:2020-03-19
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