Infrared sensor module
First Claim
1. An infrared sensor module comprising:
- a first infrared sensor that includes a first light emitting unit configured to emit infrared light to an object and a first light receiving unit configured to detect an amount of an infrared light reflected from the object;
a second infrared sensor that includes a second light emitting unit configured to emit infrared light to the object and a second light receiving unit configured to detect an amount of the infrared light reflected from the object; and
a controller to measure reflectivity of the object using a peak output voltage of the first light receiving unit, and to measure a distance to the object using not only the measured object reflectivity but also an output voltage of the second light receiving unit.
1 Assignment
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Accused Products
Abstract
An infrared sensor module includes a first infrared sensor that includes a first light emitting unit configured to emit infrared light to an object and a first light receiving unit configured to detect an amount of infrared light reflected from the object, a second infrared sensor that includes a second light emitting unit configured to emit infrared light to the object and a second light receiving unit configured to detect an amount of the infrared light reflected from the object, and a controller to measure reflectivity of the object using a peak output voltage of the first light receiving unit, and to measure a distance to the object using not only the measured object reflectivity but also an output voltage of the second light receiving unit. As a result, the distance from the infrared sensor to the object can be correctly measured irrespective of the reflectivity of the object.
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Citations
20 Claims
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1. An infrared sensor module comprising:
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a first infrared sensor that includes a first light emitting unit configured to emit infrared light to an object and a first light receiving unit configured to detect an amount of an infrared light reflected from the object; a second infrared sensor that includes a second light emitting unit configured to emit infrared light to the object and a second light receiving unit configured to detect an amount of the infrared light reflected from the object; and a controller to measure reflectivity of the object using a peak output voltage of the first light receiving unit, and to measure a distance to the object using not only the measured object reflectivity but also an output voltage of the second light receiving unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An infrared sensor module comprising:
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a first infrared sensor that includes a first light emitting unit configured to emit infrared light to an object and first and second light receiving units configured to detect an amount of the infrared light reflected from the object; and a controller to measure reflectivity of the object using a peak output voltage of the first light receiving unit, and to measure the distance to the object using the measured object reflectivity and an output voltage of the second light receiving unit. - View Dependent Claims (13, 14, 15)
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16. An infrared sensor module comprising:
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an infrared sensor that includes first and second light emitting units configured to emit infrared light to an object and a first light receiving unit configured to detect an amount of the infrared light reflected from the object; and a controller to measure reflectivity of the object using a peak output voltage of the first light receiving unit in association with infrared light emission of the first light emitting unit, and to measure the distance to the object using the measured object reflectivity and an output voltage of the first light receiving unit in association with infrared light emission of the second light emitting unit. - View Dependent Claims (17, 18, 19, 20)
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Specification