DE202011110097U1 - LED bulbs - Google Patents

Abstract

LED illuminant for use in a base (1, 2) provided with an electronic ballast (6) for a conventional fluorescent tube (3), with a tubular, at least partially transparent housing (8), at both ends (E1, E2) each two adjacent pins (4, 5) are provided, which correspond in their arrangement and design to the pins (4, 5) of the conventional fluorescent tube (3), wherein at least one in the housing (8) recorded LED (9) with a in the housing (8) recorded circuit (S) is connected, wherein the circuit (S) is formed so that at least from a switch-on with respect to the electronic ballast (6) the current and / or voltage curve during normal operation of the conventional fluorescent tube ( 3) simulated over time, so that the monitoring circuit is not responsive and by means of the electronic ballast (6) for Betr a suitable operating voltage is provided to a conventional fluorescent tube (3), and wherein the circuit (S) is further configured so as to reduce the operating voltage of the circuit.

Description

The invention relates to an LED light source. It also relates to an LED lamp and an aircraft cabin.

The DE 20 2011 003 879 U1 discloses an adapter for inserting an LED tube into a lamp body having sockets for double capped straight fluorescent tubes. The adapter has an outer part with two standardized contact pins for contacting a lamp body frame and an inner part arranged in the outer part for receiving pins on one side of the LED tube. The inner part is arranged rotatably relative to the outer part, and the outer part has an insertion slot for inserting the pins of the LED tube.

The DE 20 2011 050 150 U1 relates to a luminous means in which one or more light-emitting diodes are accommodated in a luminous body made of an at least partially translucent material. The light-emitting means has contact elements which are connected to the at least one light-emitting diode and via which an electrical voltage can be applied to the light-emitting means. In order to use and operate the light source in a socket of a conventional fluorescent tube, a two-way rectifier is inserted into the electrical connection between the contact elements and the at least one light emitting diode.

In the cabin of a passenger aircraft, conventional fluorescent tubes with a tubular, at least partially translucent housing are currently used as lighting means, at the two ends of each two adjacent pins are provided. To accommodate such fluorescent tubes conventional sockets are provided in which an electrical contact is made to an electronic ballast. The electronic ballast serves to generate an ignition voltage and to monitor the ignition process. Furthermore, thus z. B. a breakage of a filament and / or aging of the fluorescent tube detected and interrupted in such a case, the power supply of the respective base.

Conventional fluorescent tubes are relatively inexpensive, but have no particularly long shelf life. Their replacement causes the adherence to appropriately dimensioned maintenance intervals. Any maintenance causes costs and time. In that regard, an improvement of conventional bulbs would be desirable. - In particular, in the field of civil aviation, however, technical changes are subject to strict approval regulations. H. technical changes cause a high cost and time.

The object of the invention is to eliminate the disadvantages of the prior art. In particular, a particularly long-lasting light source is to be specified, which can be replaced while maintaining a conventional base against a conventional fluorescent tube.

This object is solved by the features of claims 1, 10 and 11. Advantageous embodiments of the invention are represented by the features of claims 2 to 9.

According to the invention, a lamp is proposed for use in a provided with an electronic ballast with monitoring circuit socket for a conventional fluorescent tube with a tubular, at least partially translucent housing, at both ends of each two adjacent pins are provided, which in their arrangement and Training to correspond to the pins of the conventional fluorescent tube, wherein at least one recorded in the housing LED is connected to a recorded in the housing circuit, wherein the circuit is designed so that they at least from a switch-on with respect to the electronic ballast the current and / or voltage curve in proper Operation of the conventional fluorescent tube simulated over time, so that the monitoring circuit is not responsive and by means of the electronic ballast for operating a conventional light suitable supply voltage is provided, and wherein the circuit is further configured so that so that the operating voltage is converted into a suitable for operating the LED supply voltage.

The proposed lamp is suitable directly for the replacement of a conventional fluorescent tube. It can be easily used in the base of the conventional fluorescent tube. By means of the circuit provided according to the invention, the electrical behavior of a conventional fluorescent tube, in particular during its ignition process, is simulated. As a result, even the conventionally provided electronic ballast can be used in spite of the monitoring circuit provided therein for supplying the light source with power. - The bulb is particularly durable. In particular, when used in the field of civil aviation maintenance intervals can be extended, thereby improving the efficiency of the operation of a civilian aircraft.

According to a preferred embodiment, the circuit has at least one rectifier for converting the operating voltage present as AC voltage into a supply voltage designed as a DC voltage. As a result, the operating voltage provided by the electronic ballast can be used as the supply voltage for the lighting means.

According to another particularly preferred embodiment, the two adjacent pins are each short-circuited. If the monitoring circuit of the electronic ballast is equipped to monitor the breakage of a heating wire in a conventional fluorescent tube, can be simulated by the proposed short-circuiting of the adjacent pins in a simple manner that the heating wire is OK.

According to the prior art, electronic ballasts are known which operate according to the series resonant converter method or according to the parallel converter method. In the parallel converter method, both the heating and the burning voltage are generated in a transformer. Advantageously, the two adjacent pins can be connected to one rectifier each. Thus, the proposed lamp can also be used together with electronic ballasts according to the parallel converter method.

The circuit may further comprise an LED current control for regulating an LED current for operating the LED as a function of the temperature. This makes it possible to compensate for a change in the brightness of the LED as a function of the temperature. It can be ensured over a wide temperature range across a substantially constant constant brightness of the LED. Furthermore, the circuit may comprise an age compensation circuit for compensating an age-related decrease in brightness of the LED.

The circuit expediently comprises a dimming circuit for selectively setting a brightness of the LED. This allows an adaptation of the brightness generated by the light source to the ambient brightness.

The above-mentioned age compensation circuit and / or the dimming circuit are conventional circuits which are well known to those skilled in the art in connection with the operation of LED lamps.

In a preferred embodiment, the circuit includes a microcontroller for simulating the proper operation of the conventional fluorescent tube over time. The microcontroller may integrate at least one of the following functions: dimming circuit, LED current regulation, aging compensation circuit.

According to the invention, an LED lamp is also proposed, comprising a socket provided with an electronic ballast with a monitoring circuit and an accommodated in the base LED lighting device according to the invention. According to another aspect of the invention, an aircraft cabin for a passenger aircraft with at least one LED lamp according to the invention is proposed.

An embodiment of the invention will be explained in more detail with reference to the drawings. Show it:

1 a schematic representation of a first conventional lighting device with fluorescent tube,

2 a schematic representation of the lighting device according to 1 with a first illuminant according to the invention,

3 a schematic diagram of a circuit according to the invention,

4 a schematic representation of a second conventional lighting device with fluorescent tube and

5 a schematic representation of the second illumination device according to 4 with a second illuminant according to the invention.

1 shows a first lighting arrangement. In a conventional base with oppositely arranged first 1 and second socket members 2 is a straight fluorescent tube 3 added. The fluorescent tube 3 has at its two opposite first E1 and second ends E2 each two adjacent first 4 and second pins 5 on. One of the first 4 and one of the second pins 5 comes with a first electronic ballast 6 connected. The electronic ballast 6 works here after the series resonant converter method. The other pins 4 . 5 are with a capacity 7 connected.

2 shows the in 1 described first illumination arrangement, wherein the fluorescent tube 3 replaced by an LED bulb. In an at least partially translucent, preferably straight, tubular housing 8th , is at least one LED 9 , but preferably a plurality of LEDs 9 , added. The one connection of the LED 9 is connected to my rectifier D, the other connection is grounded. The rectifier D is over the two first shorted pins 4 both with the electronic ballast 6 as well as with the capacity 7 connected. The rectifier D is also over the two second shorted pins 5 both with the electronic ballast 6 as well as with the capacity 7 connected.

3 shows an embodiment of a circuit according to the invention S. The circuit S comprises four rectifiers D1, D2, D3, D4. The rectifiers D1 and D3 are with the first shorted pins 4 , and the rectifiers D2 and D4 with the second shorted pins 5 connected. Reference numeral D10 denotes a TSV diode which is connected to the rectifiers D1 to D4. A threshold voltage of the TSV diode D10 is dimensioned so that the electronic ballast 6 - as in the case of using a conventional fluorescent tube 3 - detected an "ignition".

The reference number 10 denotes a circuit breaker, which via an ignition detector 11 the TSV diode D10 is connected downstream. With the reference number 12 Finally, an LED card is labeled on which a variety of LEDs 9 are mounted.

The function of the circuit S is as follows:
When the operating voltage is applied, the electronic ballast builds 6 about the first one 4 and second pins 5 a high ignition voltage. The ignition voltage passes through the rectifier D1 to D4 to the TSV diode D10. As a result of the threshold voltage of the TSV diode D10 detects the electronic ballast 6 now an "ignition". Here is the circuit breaker 10 open, leaving the LED card 12 not powered. Otherwise, would be through the LEDs 9 produces an unpleasant bright flash of light.

The electronic ballast 6 continues to provide an operating voltage due to the detected "ignition". If the electronic ballast 6 would detect no "ignition", it would no longer provide operating voltage.

During the "ignition" is via a resistor R, the ignition detector 11 driven. With the ignition detector 11 after a predetermined time delay, the circuit breaker 10 closed. As a result, the LEDs become 9 now via the rectifier D1 to D4 and the circuit breaker 10 directly from the electronic ballast 6 controlled and the LEDs 9 start to shine.

The in the 2 and 5 shown shorted pins 4 . 5 make sure that one in the electronic ballast 6 possibly contained circuit S is not responsive to the detection of the breakage of a heating wire and thus the operation is not interrupted. Through the shorted pins 4 . 5 becomes an "intact heating wire" of a fluorescent tube 3 simulated.

4 shows a schematic representation of a second conventional lighting device with fluorescent tube 3 , Here, the electronic ballast works 6 according to the parallel converter method. In this case, both the heating and the burning voltage is generated in a transformer T.

5 shows a schematic representation of the second illumination device according to 4 with a second illuminant according to the invention. It is with the first pins 4 a first rectifier DA and with the second pins 5 a second rectifier DB connected. The rectifiers DA, DB serve to supply the LEDs 9 with supply voltage. With the proposed provision of two rectifiers DA and DB optimum energy utilization is achieved.

This in 5 shown bulbs can - although it is in 5 not shown - even with the in 3 be shown circuit S be provided. Also in 2 Although not shown, the light source shown is provided with a circuit similar to that shown in FIG 3 shown circuit S is configured. It is only a different configuration of the rectifier DA, DB required.

LIST OF REFERENCE NUMBERS

1

first base element

2

second base element

3

Fluorescent tube

4

first pins

5

second pins

6

electronic ballast

7

capacity

8th

casing

9

LED

10

breakers

11

ignition detector

12

LED Card

D, DA, DB, D1, D2, D3, D4

rectifier

D10

TSV diode

E1

first end

E2

second end

R

resistance

S

circuit

T

transformer

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202011003879 U1 [0002]
• DE 202011050150 U1 [0003]

Claims (11)

LED illuminant for use in one with an electronic ballast ( 6 ) provided with monitoring circuit socket ( 1 . 2 ) for a conventional fluorescent tube ( 3 ), with a tubular, at least partially translucent housing ( 8th ), at the two ends (E1, E2) in each case two adjacent pins ( 4 . 5 ) are provided, which in their arrangement and design of the pins ( 4 . 5 ) of the conventional fluorescent tube ( 3 ), wherein at least one in the housing ( 8th ) recorded LED ( 9 ) with one in the housing ( 8th ) (S) is connected, wherein the circuit (S) is formed so that at least from a switch-on with respect to the electronic ballast ( 6 ) the current and / or voltage curve during proper operation of the conventional fluorescent tube ( 3 ) is simulated over time so that the monitoring circuit does not respond and by means of the electronic ballast ( 6 ) one for operating a conventional fluorescent tube ( 3 ) is provided, and wherein the circuit (S) is further configured so that so that the operating voltage in one for the operation of the LED ( 9 ) suitable supply voltage is converted. LED lighting device according to claim 1, wherein the circuit (S) has at least one rectifier (D, DA, DB, D1, D2, D3, D4) for converting the operating voltage present as AC voltage into a supply voltage designed as a DC voltage. LED lamp according to one of the preceding claims, wherein the two adjacent pins ( 4 . 5 ) are each short-circuited. LED lamp according to one of the preceding claims, wherein the two adjacent pins ( 4 . 5 ) are each connected to a rectifier (D, DA, DB, D1, D2, D3, D4). LED lighting device according to one of the preceding claims, wherein the circuit (S) is an LED current control for regulating an LED current for operating the LED ( 9 ) depending on the temperature. LED lighting device according to one of the preceding claims, wherein the circuit (S) comprises a dimming circuit for selectively setting a brightness of the LED ( 9 ). The LED illuminant of any one of the preceding claims, wherein the circuit (S) comprises a microcontroller for simulating the proper operation of the conventional fluorescent tube over time. LED lighting device according to one of the preceding claims, wherein the circuit (S) comprises an age compensation circuit for compensating an aging-related decrease in brightness of the LED ( 9 ). LED lighting device according to one of the preceding claims, wherein the microcontroller integrated at least one of the following circuits: dimming circuit, LED current control, aging compensation circuit. LED lamp comprising one with an electronic ballast ( 6 ) provided with monitoring circuit socket ( 1 . 2 ) and one in the base ( 1 . 2 ) received LED lamp according to one of the preceding claims. Aircraft cabin for a passenger aircraft with at least one LED lamp according to claim.

Images