Light sensing method, physiological parameter computing method and light sensing system
AssigneePixart Imaging Inc.
InventorsRen-Hau Gu, Chih-Hsin Lin
Life of this patent
Estimating the term…
Abstract
A light sensing method applied to a light sensing system comprising a first light sensor and at least one light source. The first light sensor comprises a plurality of light sensing units. The light sensing method comprises: (a) respectively controlling an exposure condition for each of the light sensing units according distances between each one of the light sensing units and the light source; and (b) controlling the light sensing units to sense the light from the light source according to the exposure condition. The light sensing system can have a better SNR via adjusting the exposure condition for each one of the light sensing units. Such light sensing method can be applied to compute physiological parameters.
Claims18
A light sensing method, applied to a light sensing system comprising a first light sensor and at least one light source, wherein the first light sensor comprises a plurality of light sensing units, wherein the light sensing method comprises:
- (a) respectively controlling an exposure condition of each of the light sensing units according distances between each one of the light sensing units and the light source;
- and
- (b) controlling the light sensing units to sense the light from the light source according to the exposure condition;
- wherein the step (a) controls the exposure condition via adjusting at least one of:
- a light sensing time of the light sensing units, a light sensing frequency of the light sensing units and a gain value for light sensing signals read from the light sensing units.
Alight sensing system, comprising:
- a plurality of light sensing units;
- at least one light source;
- and
- a processing unit, configured to respectively control an exposure condition of each of the light sensing units according distances between each one of the light sensing units and the light source;
- wherein the light sensing units sense the light from the light source according to the exposure condition;
- wherein the processing unit controls the exposure condition via adjusting at least one of:
- a light sensing time of the light sensing units, a light sensing frequency of the light sensing units and a gain value for light sensing signals read from the light sensing units.
Dependencies are inferred from the claim text.