LED lamp
First Claim
1. An LED lamp mounted on a lighting fixture, comprising:
- an LED source portion including a plurality of LED chips;
an illuminance sensor detecting ambient illuminance; and
a controller controlling the LED source portion in response to the illuminance of ambient light other than light emitted by the LED source portion on the basis of an output signal received from the illuminance sensor when the LED source portion is in a lighting-up state, whereinthe controller includes;
a spontaneous light illuminance calculating means calculating spontaneous light illuminance contributed to the output signal of the illuminance sensor by the light emitted by the LED source portion on the basis of a driven state of the LED source portion; and
an on-off control means turning on the LED source portion when ambient light illuminance obtained by subtracting the spontaneous light illuminance from the output signal of the illuminance sensor is less than or equal to a prescribed threshold and turning off the LED source portion when the ambient light illuminance is in excess of the threshold.
2 Assignments
0 Petitions
Accused Products
Abstract
An LED lamp (1) is employed in a state mounted on a lighting fixture. The LED lamp (1) includes an LED source portion (2) including a plurality of LED chips, an illuminance sensor module (12) detecting ambient illuminance, and a controller controlling the LED source portion (2) in response to illuminance of ambient light other than light emitted by the LED source portion (2) on the basis of an output signal received from the illuminance sensor module (12) when the LED source portion (2) is in a lighting-up state. When the LED source portion (2) is in the lighting-up state, there is a possibility that the illuminance sensor module (12) detects not only the ambient light illuminance but also spontaneous light illuminance. The controller eliminates influence by the spontaneous light illuminance, and controls the LED source portion (2) in response to the illuminance of the ambient light.
20 Citations
19 Claims
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1. An LED lamp mounted on a lighting fixture, comprising:
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an LED source portion including a plurality of LED chips; an illuminance sensor detecting ambient illuminance; and a controller controlling the LED source portion in response to the illuminance of ambient light other than light emitted by the LED source portion on the basis of an output signal received from the illuminance sensor when the LED source portion is in a lighting-up state, wherein the controller includes; a spontaneous light illuminance calculating means calculating spontaneous light illuminance contributed to the output signal of the illuminance sensor by the light emitted by the LED source portion on the basis of a driven state of the LED source portion; and an on-off control means turning on the LED source portion when ambient light illuminance obtained by subtracting the spontaneous light illuminance from the output signal of the illuminance sensor is less than or equal to a prescribed threshold and turning off the LED source portion when the ambient light illuminance is in excess of the threshold. - View Dependent Claims (2, 3, 4)
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5. An LED lamp mounted on a lighting fixture, comprising:
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an LED source portion including a plurality of LED chips; an illuminance sensor detecting ambient illuminance; and a controller controlling the LED source portion in response to the illuminance of ambient light other than light emitted by the LED source portion on the basis of an output signal received from the illuminance sensor when the LED source portion is in a lighting-up state, wherein the controller includes; a storage means storing the output signal received from the illuminance sensor; a comparison means comparing the output signal of the illuminance sensor and the value stored in the storage means with each other; and an on-off control means turning on/off the LED source portion in response to the result of the comparison of the comparison means. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. An LED lamp mounted on a lighting fixture, comprising:
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an LED source portion including a plurality of LED chips; an illuminance sensor detecting ambient illuminance; and a controller controlling the LED source portion in response to the illuminance of ambient light other than light emitted by the LED source portion on the basis of an output signal received from the illuminance sensor when the LED source portion is in a lighting-up state, wherein the controller includes a PWM control means PWM-controlling the LED source portion, and a sampling means sampling the output signal of the illuminance sensor as ambient light illuminance in an OFF-period when power supply to the LED source portion is stopped in a PWM cycle when the PWM control means PWM-controls the LED source portion, and is formed to control the LED source portion in response to the ambient light illuminance sampled by the sampling means. - View Dependent Claims (13, 14)
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15. An LED lamp mounted on a lighting fixture, comprising:
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an LED source portion including a plurality of LED chips; an illuminance sensor detecting ambient illuminance; a controller controlling the LED source portion in response to the illuminance of ambient light other than light emitted by the LED source portion on the basis of an output signal received from the illuminance sensor when the LED source portion is in a lighting-up state; and a motion sensor having a predetermined sensitivity region, wherein the controller is formed to control the LED source portion in response to an output signal received from the motion sensor, wherein the motion sensor includes a pyroelectric infrared sensor, and the LED lamp further includes a shutter unit opening/closing an infrared incidence path to a photoreceiving surface of the pyroelectric infrared sensor. - View Dependent Claims (16, 17)
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18. An LED lamp mounted on a lighting fixture, comprising:
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an LED source portion including a plurality of LED chips; an illuminance sensor detecting ambient illuminance; a controller controlling the LED source portion in response to the illuminance of ambient light other than light emitted by the LED source portion on the basis of an output signal received from the illuminance sensor when the LED source portion is in a lighting-up state; a pyroelectric infrared sensor having a predetermined sensitivity region; and a shutter unit opening/closing an infrared incidence path to a photoreceiving surface of the pyroelectric infrared sensor, wherein the controller is formed to determine the presence or absence of a human being in the sensitivity region on the basis of an output signal received from the pyroelectric infrared sensor and to control the LED source portion in response to the result of the determination. - View Dependent Claims (19)
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Specification