US 12,342,084 B2Granted

Operation method of optical sensor

AssigneeSensortek Technology Corp.

InventorsSi-Yuan Chen, Cheng-Feng Liu

Life of this patent

Estimating the term…

Loading patent…

Abstract

An operation method of an optical sensor comprising receiving an ambient light by a light-sensing device. Record a signal generated by the light-sensing device after receiving the ambient light by a operation unit. A flicker frequency of the ambient light is determined by the operation unit. A signal operation parameter is set according to the flicker frequency, and the signal operation parameter comprises a sampling time difference, which is the starting time interval of two corresponding integration time periods of a plurality of integration time periods. Furthermore, the light-sensing device and the operation unit start the calculation of the intensity of the ambient light, so that the flicker component of an ambient light source may be eliminated from the light sensing result to produce a stable sensing result.

Claims8

Dependent claims

An operation method of optical sensor, comprising:

a light-sensing device receiving an ambient light and an operation unit recording a signal generated by said light-sensing device after receiving said ambient light;
said operation unit obtaining a flicker frequency of said ambient light according to said recorded signal;
setting signal operation parameters according to said flicker frequency, said operation parameters comprising a sampling-time difference, and said sampling-time difference being a time interval between the start times of two corresponding integration time segments among even integration time segments;
and
using said light-sensing device and said operation unit to start an intensity calculation of the ambient light;
wherein in the said even integration time segments, if n integration time segments of said even integration time segments is completed in a flicker cycle of said ambient light source, any two adjacent integration time segments among said n integration time segments has a phase difference 360°/n.

3 more elements

An operation method of optical sensor, comprising:

a light-sensing device receiving an ambient light and an operation unit recording a signal generated by said light-sensing device after receiving said ambient light;
said operation unit obtaining a flicker frequency of said ambient light according to said recorded signal;
setting signal operation parameters according to said flicker frequency, said operation parameters comprising a sampling-time difference, and said sampling-time difference being a time interval between the start times of two corresponding integration time segments among even integration time segments;
and
using said light-sensing device and said operation unit to start an intensity calculation of the ambient light;
wherein said sampling-time difference set according to said flicker frequency is expressed by:
st
=
1
f
×
(
N
+
1
2
)
where st is said sampling-time difference;
f is said flicker frequency;
and N is a natural number.

17 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/067,057Filed 16 Dec 2022 · us provisional application
Priority: 16 Dec 2021
Published: US 2023/0328391 A112 Oct 2023
Granted: 24 Jun 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04N 23/73
Circuitry for compensating brightness variation in the scene: by influencing the exposure time
H04N 23/745
Circuitry for compensating brightness variation in the scene: detection of flicker frequency or suppression of flicker wherein the flicker is…
G01J 1/18
Using electric radiation detectors: using comparison with a reference electric value
G01J 1/4204
Using electric radiation detectors: with determination of ambient light