Lighting device

Abstract

This reduces malfunctions in the light-receiving section caused by infrared radiation contained in the light from the light source. [Solution] The lighting device comprises a light source, an optical sensor 71, a light receiving unit, and a case 8. The light source irradiates light into the lighting space. The optical sensor 71 has a sensor unit and a lens 712 positioned between the sensor unit and the lighting space. The light receiving unit receives infrared signals from an external device. The case 8 has a first opening 811 and a second opening 816 with a smaller opening area than the first opening 811. The case 8 houses the optical sensor 71 with the lens 712 exposed to the lighting space side through the first opening 811, and houses the light receiving unit facing the second opening. The light source, optical sensor 71, and light receiving unit are arranged in the order of light source, optical sensor 71, and light receiving unit along the first direction D1. The second opening 816 is located in the second direction D2 between the two outer edges 7123 and 7124 of the lens 712 in the second direction D2.

Claims

1. A light source that illuminates the space, An optical sensor having a sensor unit and a lens disposed between the sensor unit and the illumination space, A light receiving unit that receives infrared signals from an external device, The device comprises a case having a first opening and a second opening having a smaller opening area than the first opening, housing the optical sensor with the lens exposed to the illumination space side through the first opening, and housing the light receiving unit facing the second opening, The light source, the optical sensor, and the light receiving unit are arranged in the order of the light source, the optical sensor, and the light receiving unit along the first direction. The second aperture is located between the two outer edges of the lens in a second direction intersecting the first direction. Lighting device.

2. The light source and the illuminated space are further provided with a translucent cover. The edge of the second opening opposite to the light-receiving portion is located on the illumination space side of the surface of the cover opposite to the light source side. The lighting device according to claim 1.

3. A light source that illuminates the space, A translucent cover is placed between the light source and the illuminated space, An optical sensor having a sensor unit and a lens disposed between the sensor unit and the illumination space, A light receiving unit that receives infrared signals from an external device, The device comprises a case having a first opening and a second opening, housing the optical sensor with the lens exposed to the illumination space side through the first opening, and housing the light receiving unit facing the second opening, The edge of the second opening opposite to the light-receiving portion is located on the illumination space side of the surface of the cover opposite to the light source side. Lighting device.

4. The optical sensor and the light receiving unit are separated by a light-blocking wall that prevents light entering the case through the first opening from entering the light receiving unit. A lighting device according to any one of claims 1 to 3.

5. A light source that illuminates the space, An optical sensor having a sensor unit and a lens disposed between the sensor unit and the illumination space, A light receiving unit that receives infrared signals from an external device, A case having a first opening and a second opening, housing the optical sensor with the lens exposed to the illumination space side through the first opening, and housing the light receiving unit facing the second opening, The optical sensor and the light receiving unit are separated by a light-blocking wall that prevents light entering the case through the first opening from entering the light receiving unit. Lighting device.

6. The case has a bottom wall provided with the first opening and the second opening, The light-suppressing wall protrudes away from the bottom wall on the surface of the bottom wall opposite to the illuminated space side, The distance from the end of the light-receiving section on the bottom wall side to the surface of the bottom wall is shorter than the distance from the end of the light-suppressing wall on the opposite side to the bottom wall side to the surface of the bottom wall. The lighting device according to claim 4 or 5.

7. The light-suppressing wall is integrated with the case. A lighting device according to any one of claims 4 to 6.

8. The light-suppressing wall is cylindrical and surrounds the light-receiving part. The lighting device according to any one of claims 4 to 7.

9. The sensor unit detects a person present in the illuminated space. A lighting device according to any one of claims 1 to 8.

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