LED lamp

• US 9,488,355 B2
• Filed: 06/04/2015
• Issued: 11/08/2016
• Est. Priority Date: 04/22/2011
• Status: Active Grant

• Current Assignee: IRIS Ohyama Incorporated (Oyama KK)
• Original Assignee: ROHM Co., Ltd.
• Inventors: Igaki, Masaru, Tanaka, Masahide
• Primary Examiner(s): Owens, Douglas W
• Assistant Examiner(s): CHO, JAMES HYONCHOL
• Application Number:
  US14/730,941
• Publication Number:
  US 20150285479A1
• Time in Patent Office: 523 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: F21K 9/278 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21V 23/0464 the sensor sensing the level of ambient illumination, e.g. dawn or dusk sensors
• CPC Class Codes: F21V 23/0471 the sensor detecting the proximity, the presence or the movement of an object or a person
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2103/30 curved
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/12 using optical feedback
• CPC Class Codes: H05B 45/325 Pulse-width modulation [PWM]
• CPC Class Codes: H05B 47/11 by determining the brightness or colour temperature of ambient light
• CPC Class Codes: H05B 47/115 by determining the presence or movement of objects or living beings
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

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.

Claims

1. A straight LED lamp, comprising:

a substrate including two opposed first sides and a second side as an end portion of the first side, wherein the second side is shorter than the first side;

an LED chip group including a plurality of LED chips disposed on a front surface of the substrate at least along an extension direction of the first side;

a case covering the substrate and the LED chip group and being able to transmit light emitted from the LED chip group;

a cap holding the substrate and the case;

a base electrically connected to the LED chip group and a socket of a lighting fixture, and connected to the cap; and

a connector disposed on a side of the front surface of the substrate so as to be apart from a center of the first side with respect to the extension direction, to which a living body recognition sensor for recognizing a living body'"'"'s presence is mounted, wherein

the LED chip group emits the light with an illumination axis extending toward a direction perpendicular to the front surface of the substrate, and

the living body recognition sensor is mounted to the connector so that a sensitivity axis of the living body recognition sensor and the illumination axis intersect with each other.

2. The straight LED lamp according to claim 1, wherein

the substrate is held by the cap at the end portion of each of the first sides,

the connector is held by the cap.

3. The straight LED lamp according to claim 1, wherein

an opening is formed on a part of the case, and

the living body recognition sensor is connected to the connector via the opening.

4. The straight LED lamp according to claim 1, wherein

a detecting portion of the living body recognition sensor protrudes from a surface of the straight LED lamp on the front surface side of the substrate.

5. The straight LED lamp according to claim 1, wherein

at least two connectors are provided so as to sandwich the center of the first side with respect to the extension direction.

6. The straight LED lamp according to claim 1, further comprising a controller that changes brightness of the light emitted from the LED chip group on a basis of recognition of a living body'"'"'s presence by the living body recognition sensor.

7. The straight LED lamp according to claim 6, wherein

the controller has a first mode where

the LED chip group is changed into a lighted state to emit the light, in case the living body recognition sensor has recognized a living body'"'"'s presence in a recognition state and

the LED chip group is changed into an unlighted state where light emission is stopped, in case the living body recognition sensor does not recognize a living body'"'"'s presence in an unrecognition state.

8. The straight LED lamp according to claim 6, wherein

the controller has a second mode where

the LED chip group is changed into a lighted state to emit the light, in case the living body recognition sensor has recognized a living body'"'"'s presence in a recognition state and

the LED chip group is changed into a semi-lighted state where brightness of the light emitted from the LED chip group is reduced so as to be smaller than brightness in the lighted state, in case the living body recognition sensor does not recognize a living body'"'"'s presence in an unrecognition state.

9. The straight LED lamp according to claim 6, wherein

the controller has a first mode where

the LED chip group is changed into a lighted state to emit the light, in case the living body recognition sensor has recognized a living body'"'"'s presence in a recognition state and

the LED chip group is changed into an unlighted state where light emission is stopped, in case the living body recognition sensor does not recognize a living body'"'"'s presence in an unrecognition state,

the controller further has a second mode where

the LED chip group is changed into the lighted state to emit the light, in case the living body recognition sensor has recognized a living body'"'"'s presence in the recognition state and

the LED chip group is changed into a semi-lighted state where brightness of the light emitted from the LED chip group is reduced so as to be smaller than brightness in the lighted state, in case the living body recognition sensor does not recognize a living body'"'"'s presence in the unrecognition state.

10. The straight LED lamp according to claim 1, further comprising a living body recognition sensor holding mechanism that holds the living body recognition sensor so as to change a direction of the sensitivity axis of the living body recognition sensor.

11. A straight LED lamp, comprising:

a substrate;

an LED chip group including a plurality of LED chips each of which emits light and being disposed on a front surface of the substrate;

a connector disposed on the front surface side of the substrate so as to be apart from an illumination axis extending toward a direction perpendicular to the front surface of the substrate from a center of a light-emitting area of the light emitted by the LED chip group, to which a living body recognition sensor for recognizing a living body'"'"'s presence is mounted; and

a case covering the substrate and the LED chip group, being able to transmit light emitted from the LED chip group, and being formed with an opening at a part of the case on the front surface side of the substrate,

wherein

the living body recognition sensor is mounted to the connector so that a sensitivity axis of the living body recognition sensor and the illumination axis intersect with each other, and

the living body recognition sensor is connected to the connector via the opening.

12. The straight LED lamp according to claim 11, wherein

a detecting portion of the living body recognition sensor protrudes from a surface of the straight LED lamp on the front surface side of the substrate.

13. The straight LED lamp according to claim 11, further comprising a controller that changes brightness of the light emitted from the LED chip group on a basis of recognition of a living body'"'"'s presence by the living body recognition sensor.

14. The straight LED lamp according to claim 11, further comprising a living body recognition sensor holding mechanism that holds the living body recognition sensor so as to change a direction of the sensitivity axis of the living body recognition sensor.

15. A straight LED lamp, comprising:

a substrate;

an LED chip group including a plurality of LED chips each of which emits light and being disposed on a front surface of the substrate; and

a connector disposed on the front surface side of the substrate so as to be apart from an illumination axis extending toward a direction perpendicular to the front surface of the substrate from a center of a light-emitting area of the light emitted by the LED chip group, to which a living body recognition sensor for recognizing a living body'"'"'s presence is mounted,

wherein

the living body recognition sensor is mounted to the connector so that a sensitivity axis of the living body recognition sensor and the illumination axis intersect with each other, and

at least two connectors are provided so as to sandwich the illumination axis.