JPH0645208U - Energy recovery device for vehicle lighting - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a device capable of recovering and reproducing light energy of a part of a light flux emitted from a light source bulb 3 of a vehicle lamp, which cannot be effectively used conventionally. A light path of a light flux emitted from a light source bulb 3 and reflected by an effective reflection surface 1a and passing through a front lens 2, and a light flux emitted from a light source bulb 3 and directly incident on and passed through the front lens 2 are not obstructed. Solar cell 4
Is arranged, and the energy of light that has hitherto been incident on the ineffective reflection surface 1b is recovered as electrical energy.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention converts the light energy of the light flux emitted from the light source bulb of the vehicle lamp other than the portion effectively used to form a desired light distribution pattern into electric energy and recovers it. The present invention relates to a created energy recovery device.

[0002]

[Prior art]

 3A and 3B show a conventional vehicle lamp, FIG. 3A is a front view, and FIG. A front lens 2 is attached to cover the front opening of the lamp housing 1. The back surface of the lamp housing 1 is formed into a paraboloid of revolution, and the inner surface thereof constitutes a reflecting surface 1a '. The standing wall portion 1b 'other than the reflecting surface 1a' is an ineffective reflection surface 1b. The light emitted from the light source bulb 3 as shown by the arrows a and b and reflected by the rotating parabolic reflection surface 1a 'becomes a light beam parallel to the optical axis Z as shown by the arrows c and d, and is reflected by the prism 2a of the front lens. And is effectively used to form a desired light distribution pattern. However, the light flux emitted toward the standing wall portion 1b 'as shown by the arrow e is not effectively used even if reflected by this portion, and becomes stray light.

[0003]

[Problems to be solved by the device]

 In the vehicle lamp of the conventional example, as described with reference to FIG. 3B, a part or most of the luminous flux emitted from the light source bulb is effectively used, and the effective utilization rate of the luminous flux is set to 100%. I couldn't. The main reason for this is that the optical characteristics of vehicular lamps are legally regulated, so that light that cannot be used to form a light distribution pattern that conforms to the regulations is invalid.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an apparatus capable of recovering and reusing the energy of light, which has been conventionally used as an ineffective light flux.

[0005]

[Means for Solving the Problems]

 In order to achieve the above purpose (energy recovery of ineffective light), the energy recovery device for a vehicular lamp according to the present invention blocks an effective luminous flux in a space surrounded by a lamp housing and a lens of the vehicular lamp. It is characterized in that it is positioned so that it does not exist and a solar cell is installed.

[0006]

[Action]

 According to the above configuration, the installed solar cell does not block the effective luminous flux, so the original light distribution pattern of the lamp is not changed, and the previously invalid luminous flux is converted into electrical energy and collected. Therefore, the energy efficiency of the lamp is improved.

[0007]

【Example】

 1 and 2 show one embodiment of the present invention, and FIG. 1 is an explanatory view in which wiring symbols are added to a sectional view of a vehicle lamp improved by applying the present invention to the conventional example of FIG. 3 (B). FIG. 2 is a wiring diagram in which the electrical components of the above embodiment are extracted and represented by symbol marks. (See FIG. 1) The solar cell 4 is arranged in a space (lamp chamber) surrounded by the lamp housing 1 and the front lens 2 so as not to block an effective luminous flux. In this example, the effective luminous flux is a. A light beam emitted from the light source bulb 3, reflected by the effective reflection surface 1a and passing through the front lens 2, and b. The light flux is a direct luminous flux emitted from the light source bulb 3 and passing through the front lens 2. Thus, the solar cell 4 of the present example is attached to the ineffective reflection surface 1b which is the standing wall portion of the lamp housing 1 so as not to block the effective luminous fluxes of A and B. The above-mentioned ineffective reflection surface means "a surface where the reflected light is not effectively utilized even if the incident light flux is reflected", and it does not matter whether or not the reflection action is actually performed. The solar cell 4 of this example is an amorphous silicon solar cell (outdoor 2448 mm), and two solar cells are connected in series. The effective average distance between the solar cell 4 and the filament of the light source bulb 3 is 50 mm. (See FIG. 1 and FIG. 2) As described above, the electrical output of the two solar cells 4 connected in series is supplied to the vehicle-mounted battery 6 via the backflow prevention diode 5 to charge it. In this example, an output voltage of 12 V and an output current of 1.7 mA were obtained. When the present invention is implemented, the method of installing the solar cell 4 does not necessarily need to be in close contact with the standing wall portion, and can be set appropriately so as not to block the effective luminous flux. Further, the electrical output of the solar battery 4 may be used for charging the battery as in this example, or may be used for other purposes (for example, lighting of a pilot lamp).

[0008]

[Effect of device]

 According to the present invention, it is possible to recover the light energy of the light flux, which was invalidated in the prior art, as electrical energy, which greatly contributes to the improvement of the energy efficiency of the vehicular lamp.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an energy recovery device according to the present invention, in which wiring symbols are added to a cross section of a vehicular lamp.

FIG. 2 is a wiring diagram showing an electrical component of the energy recovery device for a vehicle lamp shown in FIG.

FIG. 3 shows a conventional vehicle lamp, (A) is a front view,
(B) is the BB sectional arrow line view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lamp housing, 1a ... Effective reflection surface, 1b ... Invalid reflection surface, 2 ... Front lens, 2a ... Prism, 3 ... Light source bulb, 4 ... Solar cell, 5 ... Backflow prevention diode, 6 ... Vehicle-mounted battery.

Claims (1)

[Scope of utility model registration request] 1. An energy source for a vehicular lamp, wherein a solar cell is arranged in a space surrounded by a lamp housing and a lens of the vehicular lamp so as not to block an effective luminous flux. Recovery device.