JPS6240492Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lighting device, and more particularly to a structure in which light from a light source is extracted as electrical energy by a photoelectric conversion element.

Generally, emergency lighting equipment is equipped with a storage battery as an emergency power source, but since the storage battery is naturally discharged, the battery must be constantly charged to compensate for the amount of natural discharge. For this reason, conventionally, as shown in FIG. 7, the main body 1 of the appliance includes a lighting circuit 3 for lighting a straight tube fluorescent lamp 2 such as a ballast, and a storage battery 4 for lighting the lamp 2 when the AC power is cut off.
A lighting unit 5 having a charging circuit connected to an AC power source is connected to the storage battery 4. This structure requires three AC power lines,
The circuit configuration and wiring are complicated, and the storage battery 4 is charged from an AC power source, which consumes a lot of power.
It also has the disadvantage that maintenance and inspection of the storage battery is time-consuming.

For this reason, a method of converting the light emitted from the lamp into electrical energy using a photoelectric conversion element and charging the storage battery with this electrical energy can be considered, but for example, as shown in Publication of Utility Model Publication No. 36-31576, In a structure in which a photoelectric conversion element such as a photovoltaic cell, a thermoelectric conversion element, etc. is attached to the reflector plate, the reflection efficiency decreases because the photoelectric conversion element is provided in the part of the reflector plate that effectively reflects the light from the lamp 2 in the irradiation direction. However, when considering the role of a lighting device, it has the disadvantage of being used in a way that puts the cart before the horse.

Furthermore, as shown in US Pat. No. 3,402,322, a structure in which a thermoelectric conversion element is embedded in the back side of a reflector is known, but in such a structure, the heat absorbed by the reflector is converted into thermoelectrics by thermal conduction. Thermal efficiency is low because it is conducted to the element.Moreover, if the reflectance of the reflective surface of the reflector plate is high, the heat will be reflected along with the light, resulting in insufficient thermoelectric conversion, and if the reflectance is low, the light reflection efficiency will decrease and the lighting It has the disadvantage of reducing the efficiency of the instrument.

The present invention has been developed in view of the above-mentioned drawbacks, but by arranging a photoelectric conversion element on the back side of the rod-shaped light source of the reflector and within a range of approximately the same width as the diameter of the straight pipe portion of this light source. To provide a lighting device capable of converting light into electrical energy and charging a storage battery without impairing the reflection efficiency of a reflector, thereby saving power.

Next, the structure of an embodiment of the present invention will be explained with reference to FIGS. 1 and 2.

10 is a rod-shaped light source, such as a straight tube fluorescent lamp;
Lamp sockets 12 provided at both ends of the reflector 11
is installed on. The reflecting plate 11 is formed into a box shape having an irradiation part 13 with an open lower surface having a trapezoidal cross section, and has a recessed part 14 in which the lamp 10 is housed.

Further, a plurality of photoelectric conversion elements 15 are provided on the back side of the lamp 10 on the opposite side of the irradiation part 13 of the reflection plate 11 and within a range of approximately the same width as the diameter of the straight pipe part of this lamp 10. .

Next, the operation of this embodiment will be explained.

The light from the lamp 10 is directly irradiated from the irradiation part 13 and is reflected by the reflection plate 11, and is reflected by the irradiation part 13.
irradiated from.

Further, the light irradiated onto the back side of the lamp 10 is received by the photoelectric conversion element 15 and converted into electrical energy.

In the above embodiment, a recessed open type lighting fixture has been described, but the present invention can also be applied to a wall lighting fixture that reflects light in one direction, as shown in FIG. This reflector 1
1 has a concave portion 14 that encloses the lamp 10 and has a circular cross section and an ellipsoidal cross section. A photoelectric conversion element 15 is provided along the lamp 10 on the back side of the lamp 10 with respect to the irradiation part 13 of the reflection plate 11.

Further, as shown in FIG. 4, a photoelectric conversion element 15 may be provided on the back side of the lamp 10 with respect to the irradiation part 13 of the reflection plate 11 in which a recess 14 containing the lamp 10 having a circular or arcuate cross section is formed.

Further, in a structure in which reflective plates 11 are arranged in parallel as shown in FIG. 4, each reflective plate 11 is provided with a photoelectric conversion element 15.

It can also be applied to an inverted Fuji-shaped lighting fixture as shown in FIG. The inverted triangular reflector 11 of this device
A photoelectric conversion element 15 is provided on the back side of the lamp 10 on both reflective surfaces.

Further, when each of the above-mentioned devices is used as an emergency lighting device, the socket 12 is connected to a lighting circuit 19 including a ballast connected to AC power sources 17 and 18 within the device body 16, as shown in FIG.

Further, a lighting circuit 20 including a charging circuit to which the photoelectric conversion element 15 is connected is provided in the main body 16, and this lighting circuit 20 is connected to a storage battery 21 provided in the main body 16, so that the electric energy generated in the photoelectric conversion element 15 is transferred to the storage battery 21. The lamp 10 is lit by the storage battery 21 when the alternating current power supply is cut off.

Furthermore, the electrical energy generated by the photoelectric conversion element 15 can also be charged to a storage battery of another appliance.

According to the present invention, the photoelectric conversion element is provided on the reflector plate on the back side of the rod-shaped light source and within a range of approximately the same width as the diameter of the straight tube part of the light source, so that the reflector has the highest reflection efficiency. Because the photoelectric conversion element is installed in the lower part, it is possible to save power without impairing the reflection efficiency of the reflector, and in particular, it is possible to charge the storage battery of emergency lighting equipment with the amount of electricity that has decreased due to natural discharge. Wiring can also be simplified.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view of a lighting device showing one embodiment of the present invention, FIG. 2 is a longitudinal front view of the same, and FIGS. 3, 4, and 5 are longitudinal side views showing other embodiments. , FIG. 6 is a circuit diagram showing an embodiment of the present invention, and FIG. 7 is a circuit diagram of a conventional lighting device. 10... Lamp as a rod-shaped light source, 11... Reflection plate, 15... Photoelectric conversion element.

Claims (1)

[Scope of utility model registration request] a rod-shaped light source; a reflecting plate operatively disposed on the rod-shaped light source; A lighting device characterized by comprising a photoelectric conversion element provided therein.