Method and device of proximity sensing
A method of proximity sensing presets a first light emitting element and a light sensor which next to each other, and a second light emitting element which spaced from the light sensor for a predetermined distance. When the first light emitting element emits a first light signal, the light sensor se...
Saved in:
Main Authors | , |
---|---|
Format | Patent |
Language | Chinese English |
Published |
16.04.2014
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | A method of proximity sensing presets a first light emitting element and a light sensor which next to each other, and a second light emitting element which spaced from the light sensor for a predetermined distance. When the first light emitting element emits a first light signal, the light sensor senses a first reflect light signal of the first light signal, and when the method determines the strength of the first reflect light signal bigger than a first threshold, it determines an object is near, and continually determines if the strength of the first reflect light signal still bigger than a second threshold, if not, the second light emitting element emits a second light signal, and the light sensor senses a second reflect light signal of the second light signal, and the method determines if a ratio of the strength of the first reflect light signal and the strength of the second reflect light signal bigger than a third threshold, if yes, it determines an object is near. |
---|---|
Bibliography: | Application Number: TW20120137700 |