Abstract:
The invention relates to a lamp for vehicles which is integrated in the surface of a vehicle part and which is removable. The lamp is switched on and off via a radio signal and/or a light beam of an infrared diode received by a sensor. The fluorescent plastic material of the lamp body, the solar cell, the sensor, the storage elements and the LED (OLED and/or PLED) form a unit of the lamp and this unit can be mounted and removed a such.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention refers to a lamp for vehicles, which is integrated in the surface of a vehicle part, which is removable and which is designed with at least one solar module, one energy storage, an illumination device as well as a plug connection in order to supply a consumer with stored energy and/or to feed the energy storage of the vehicle. 
     2. Description of the Relevant Prior Art 
     DE 198 55 258 C1 and DE 100 42 100 A1 refer to lamps (flashlights) which are designed with at least one collector, solar module, energy storage, illuminating body and one plug connection arranged in a frame as one unit, which can be removed from a sun visor of a vehicle in order to be utilized outside the vehicle. 
     SUMMARY OF THE INVENTION 
     It is an object of the invention to further develop such a lamp, which in addition to being supplied with energy from solar modules, should be useable with a wireless remote control, for switching it on and off, or used as remote control itself. 
     To solve this object, a sensor device is installed within the lamp and/or external thereto which is remote-controlled in order to trigger a switching process. Further advantageous developments are described in the following. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     In the drawing: 
     FIG. 1 shows a sectional view of a lamp body with a thin-film solar module layer attached peripherally; 
     FIG. 2 shows a sectional view of a lamp body with lamellar solar cells attached peripherally; 
     FIG. 3 is a schematic diagram of a lamp with energy supplement via a fuel cell. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The lamp installed in a sun shield, or installed at the vehicle ceiling or at the back of the vehicle seats can be of an oval type. However, a box type form or a symmetric or non-symmetric form is possible also as well as a concave or convex embodiment. The lamp body  1  consists of a fluorescent material which can be blow-molded. In this way, a production of the system “lamp” in a flat form is possible. However, other types of production especially considering the location of utilization or considering the requirement of being able to easily exchange the lamp parts within the lamp body  1  are possible. The separation of a lamp body  1  in two parts  1   a ,  1   a  can be provided. They are connectable with another to form a unit by means of a ring-shaped spring lock  1   c , e.g. via a localized spring lock with a respectively arranged film hinge. This makes it possible—aside from a reflecting aluminum layer  1   d -to further arrange replaceable solar cells  4  to be illuminated and at least one illumination device (of a light saving design)  5 . 
     The lamp body  1  can be equipped with a light-transmitting coating  3   a  on its visible exterior or periphery  1 ′, which protects the lamp body from damages and contamination, on the one hand, while the coating can be colored to match the color of the surroundings, on the other hand. The light transmittance will be ensured by selecting a respective material or by providing openings such a holes or slots  3   a′.    
     Since the entire lamp body  1  preferably consist of luminesce material as a light collector, solar cells  4 , 4 ′ can be provided on the periphery of the lamp body as well as in its interior. The arrangement of the solar cells as a layer  4  or lamellas  4 ′ depends on the provision of a reflecting aluminum layer  1   d  in the interior of the lamp body  1  and the type of light transfer, known in the art, from the lamp body  1  onto each individual solar cell  4 ,  4 ′. The utilization of translucent solar cells  4 , 4 ′ appears favorable since, in this way, the light is able to reach adjacent solar cells thereby increasing their energy generation. 
     To arrange the solar cells  4 —especially the thin-film solar cells—as a layer on the periphery of the lamp body  1 , a polyimide (capton) foil (not shown) can be used onto which flexible solar cells  4  are welded, soldered or glued. LEDs can be applied on the polyimide foil, especially thin, flexible and lamellar type organic LEDs (OLEDs) and/or polymeric LEDs (PLEDs) as an illumination device  5  as a circuit diagram as well in the interior of the lamp body  1 , for instance, around its notch  3  in order to increase the illumination power of the (flashlight) light. A sensor device in the form of a capton-sensor  6  embodied as a thin-film can also be applied. Other suitable sensors are, for instance, capacitive, optoelectronic, piezoelectronic, inductive and infrared sensors. The sensors are designed by known semiconductor technology, e.g. on the basis of silicon or gallium-arsenic. 
     The installation of solar cells  4 ′ of lamellar type perpendicular on the periphery  1 ′ of the lamp body  1  as well as in its interior as a glass cover in a construction known in the art, result in a best possible transmission of the luminescence light onto these solar cells with respective energy generation. However, it also results in an increased constructional expenditure so that the cost/benefit factor compared with, for instance, a usage of several simple lamps with solar cells fixed onto the surface of the lamp body according to the invention could play a decisive roll. 
     The lamp body  1  shows—for instance on a side opposite the side on which the light impinges from the exterior—a notch  3 . The notch enables the light—which is enhanced by the aluminum foil  1   d —to emerge from the interior of the lamp body  1 . This notch  3  can be closed, if necessary, with a translucent and/or slidable or hinged solar cell  4   a.    
     The lamp according to the invention is provided with a sensor device having at least one sensor  6  (indicated in FIG. 3) for reception and one sensor  6 ′ for transmission of signals. The sensors are placed within the lamp body  1  or externally on the lamp body  1 —in general so as to be visible. For encoding and/or decoding of radio waves or rays (e.g., infrared rays) which impinge upon the sensor  6 , at least one chip  7  is installed in the lamp body  1 . In this way, the sensor  6  of the lamp can be used, for instance, not only for wireless on and off switching of the lamp but can also be used as a sender  6 ′ for turning on the brake light via an installed transmitter sensor  6  when actuating the brake pedal. The low energy consuming sensors  6  and  6 ′ as well as chips  7  can be operated by the energy of the energy storage  8  of the lamp supplied by the energy generated by the solar cells  4 ,  4 ′. The energy storage  8  is preferably in the form of a thin-film power condenser (see U.S. Pat. No. 6,104,597), and takes up little space. 
     When the inventive lamps are installed, for instance, in vehicle door handles, they can be activated via a RF-radio signal or optically by an infrared signal via the ignition key by means of a reception sensor  6  and can thus illuminate the area in front the door. With such an arrangement, no wiring is necessary anymore for switching on the lamp in the vehicle when opening the vehicle door. This wireless door contact could also correspond with an electronic car key or even with the heat radiation of a person; however, this would be a questionable solution in regard to safety consideration and enablement of theft. 
     By installing a printed circuit board with an auxiliary circuit in the lamp body  1  and an auxiliary illumination body  5 ′, especially an organic light-emitting diode (OLED) and/or a polymeric light-emitting diode (PLED), at least one auxiliary illumination body  5 ′ can be switched on automatically in case of failure of the diode(s) of the illumination device  5  which is installed in or on the lamp body. 
     Depending on the vehicle type—passenger car, truck and the like, train, boat, airplane etc.—lamps are required in various sizes and emitted light intensity (lux). For this reason the luminous intensity of a “flashlight” is often insufficient. In general, it is possible to bundle the energy generated in the solar cells  4 , 4 ′ and the batteries, e.g. power condensers  8 , for supplying one or more larger lamps with the assistance of plug connections  9  installed at the lamp bodies  1  and, if necessary, supplement it with energy from the vehicle battery. Additional energy may come from at least one lamellar membrane fuel cell  12  with the assistance of hydrogen cartridges  10  as shown in the circuit diagram according to FIG.  3 . 
     In the circuit diagram of FIG. 3 a “piezo-sensor”  6   a  is shown which controls the operation of light-emitting diodes  5 , 5 ′ and, in the case of one diode  5  failing, switches on a near-by auxiliary diode  5 ′ automatically. This is important especially when the installation of a display (not shown) comprised of OLED foil and/or PLED foil is provided at the lamp. 
     While specific embodiments of the invention have been shown and described in detail to illustrate the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.