DE102016201330A1 - Conversion lighting device and system - Google Patents

Abstract

There is proposed a lighting device comprising at least one semiconductor light element, comprising a first connection and a second connection, wherein the first connection and the second connection are adapted to be placed in a socket for a fluorescent tube, the first connection comprising two pins and the second connection comprises two pins, wherein the two pins of the first connection are coupled via at least one high-pass filter and / or wherein the first connection and the second connection are coupled via a high-pass filter.

Description

The invention relates to a lighting device comprising at least one semiconductor light element, wherein the lighting device can be used as a conversion lighting device instead of, for example, a fluorescent tube.

A lighting device may include a tube and an electronic ballast. It is known to use a retrofit LED tube instead of a fluorescent tube, for. B. a T8 fluorescent tube. The LED tube includes numerous semiconductor light elements, e.g. B. LEDs, which are arranged for example in series, also referred to as an LED chain. At least one LED chain can be arranged in the LED tube. The LED tube may include a plurality of LED strings, for. B. two mutually parallel LED chains, the cathodes of the first LED chain have in the opposite direction to the cathodes of the second LED chain.

The LED tube should work in conjunction with the electronic ballast previously used for the fluorescent tube. Thus, the LED tube can be used in place of the fluorescent tube to take advantage of the higher energy efficiency of the LEDs over the fluorescent lamp.

However, there is a disadvantage in that the electronic ballast can lead to a higher current in the event that the conversion LED tube is used, which may damage the ballast and / or the LED tube.

The problem to be solved is to overcome the drawback of the prior art and, in particular, to provide an efficient solution for electronic ballast co-operating conversion LED tubes.

This problem is solved according to the features of the independent claims. Further embodiments emerge from the dependent claims.

• – mindestens ein Halbleiterlichtelement umfasst,
• – eine erste Verbindung und eine zweite Verbindung umfasst,
• – wobei die erste Verbindung und die zweite Verbindung ausgelegt sind, um in einer Fassung für eine Leuchtstoffröhre platziert zu werden,
• – wobei die erste Verbindung zwei Stifte umfasst und die zweite Verbindung zwei Stifte umfasst,
• – wobei die beiden Stifte der ersten Verbindung über mindestens ein Hochpassfilter gekoppelt sind und/oder wobei die erste Verbindung und die zweite Verbindung über ein Hochpassfilter gekoppelt sind.

To overcome this problem, a lighting device is provided, wherein the lighting device

• Comprising at least one semiconductor light element,
• Comprising a first connection and a second connection,
• The first connection and the second connection being designed to be placed in a socket for a fluorescent tube,
• Wherein the first connection comprises two pins and the second connection comprises two pins,
• - Wherein the two pins of the first connection are coupled via at least one high-pass filter and / or wherein the first connection and the second connection are coupled via a high-pass filter.

It is noted that "coupled via a filter" means that the electrical connection may comprise such a filter; it may include other means and does not require that such coupling be direct and exclusive coupling.

The proposed solution has the advantage that the (eg magnetic) ballast and the conversion lamp are not damaged and no harmful increase in temperature experienced. The solution is more efficient compared to a solution that uses a relay. In addition, the solution provides a higher efficiency factor compared to previous solutions.

The device may in particular be a conversion lamp, z. B. a Umrüströhre, which comprises the at least one semiconductor light element (eg., Light emitting diode, LED), and which can be plugged into a socket for a fluorescent tube; the conversion lamp is designed so that it can be controlled by a ballast (also referred to as electronic ballast ECG - electronic control gear) of the fluorescent tube.

There may be at least one high pass filter, e.g. B. a capacitor arranged in parallel to a resistor, may be provided in the current path between two pins of one of the connections (or both connections) and / or between both connections. The two connections can be connected (with or without such a high-pass filter) to an input of a rectifier, wherein the output of the rectifier drives the at least one semiconductor light element (directly or indirectly).

It is noted that the at least one semiconductor light element may be arranged between the first connection and the second connection.

In one embodiment, the two pins of the first connection are coupled via two high-pass filters.

In one embodiment, the two pins of the second connection are coupled via two high-pass filters.

• – umfasst die Einrichtung weiterhin zwei erste Widerstände und zwei zweite Widerstände,
• – wobei die beiden Stifte der ersten Verbindung über die beiden ersten Widerstände geschaltet sind, wobei die beiden ersten Widerstände in Reihe angeordnet sind,
• – wobei die beiden Stifte der zweiten Verbindung über die beiden zweiten Widerstände geschaltet sind, wobei die beiden zweiten Widerstände in Reihe angeordnet sind,
• – wobei die Einrichtung weiterhin einen Gleichrichter umfasst, wobei ein erster Knoten zwischen den beiden ersten Widerständen und ein zweiter Knoten zwischen den beiden zweiten Widerständen mit einem Eingang des Gleichrichters verbunden sind,
• – wobei die Einrichtung weiterhin eine Einheit umfasst, die über einen Ausgang des Gleichrichters geschaltet ist, wobei die Einheit das mindestens eine Halbleiterlichtelement umfasst.

In one embodiment

• The device further comprises two first resistors and two second resistors,
• - The two pins of the first connection connected via the two first resistors are, wherein the two first resistors are arranged in series,
• - Wherein the two pins of the second connection are connected via the two second resistors, wherein the two second resistors are arranged in series,
• - wherein the device further comprises a rectifier, wherein a first node between the two first resistors and a second node between the two second resistors are connected to an input of the rectifier,
• - wherein the device further comprises a unit which is connected via an output of the rectifier, wherein the unit comprises the at least one semiconductor light element.

Each of the resistors mentioned here can be an ohmic resistor.

In one embodiment, a capacitor is connected in parallel with each of the first two resistors.

In one embodiment, a capacitor is arranged in parallel with each of the first two resistors and with each of the two second resistors.

In one embodiment, the first node between the two first resistors is connected to the input of the rectifier via the high-pass filter and the second node between the two second resistors.

In one embodiment, the device further comprises a DC-DC converter having an input and an output, wherein the unit is connected across the output of the DC-DC converter and the input of the DC-DC converter is connected via the output of the rectifier ,

In one embodiment, at least one resistor having a capacitor in parallel has fuse functionality.

In one embodiment, the fuse functionality is provided by the resistor being an SMD resistor.

The SMD resistor may have a predetermined electrical power that it can handle; exceeding this predefined electrical power will cause the SMD resistor to become faulty, i. H. high impedance (the resistance value of the faulty resistor is infinite). It is noted that other types of resistors may be used to provide such fuse functionality.

In one embodiment, the semiconductor light element comprises a light-emitting diode, in particular at least one chain of light-emitting diodes, which are arranged in series.

In one embodiment, the semiconductor light element comprises a first string of light emitting diodes and a second string of light emitting diodes, each string having an opposite orientation, the first string of light emitting diodes and the second string of light emitting diodes being arranged parallel to each other.

Thus, the cathodes of the LEDs of the first chain are arranged in one direction and the cathodes of the LEDs of the second chain are arranged in the opposite direction.

In one embodiment, the device is a lamp or lamp that includes at least one lamp.

In addition, a system is proposed that includes the illumination device as described herein and a ballast for driving the illumination device.

In particular, the system may be a luminaire comprising a socket for receiving the illumination device. Such a socket may be a socket for accommodating any of the following types of fluorescent tubes: T2, T4, T5, T8, T10, T12 or T9.

Embodiments will be shown and illustrated with reference to the drawings. The drawings serve to illustrate the basic principle so that only aspects necessary for understanding the basic principle are presented. The drawings are not to scale. In the drawings, the same reference numerals denote like features.

1 shows a schematic diagram of a conversion LED tube comprising a first connection with two pins and a second connection with two pins;

2 shows an alternative diagram of in 1 shown conversion LED tube;

3 shows yet another alternative diagram of the conversion LED tube of 1 ,

1 shows a schematic diagram of a conversion LED tube comprising a first connection with two pins 101 and 102 and a second connection with two pins 103 and 104 ,

The pencil 101 is via a resistor R1 to a node 105 coupled. A capacitor C1 is arranged in parallel to the resistor R1. The pencil 102 is via a resistor R2 to the node 105 coupled. A capacitor C2 is arranged in parallel to the resistor R2. The pencil 103 is via a resistor R3 to a node 106 coupled. The pencil 104 is via a resistor R4 to the node 106 coupled.

A rectifier comprises the diodes D1 to D4. The knot 105 is via the diode D1 to a node 109 coupled, wherein the cathode of the diode D1 to the node 109 has. The knot 105 is via the diode D4 to a node 108 coupled, wherein the cathode of the diode D4 to the node 105 has. The knot 106 is via the diode D2 to the node 109 coupled, wherein the cathode of the diode D2 to the node 109 has. The knot 106 is via the diode D3 to the node 108 coupled, wherein the cathode of the diode D3 to the node 106 has.

One unity 107 is between the nodes 108 and 109 connected. In this example, the unit comprises 107 several LEDs connected in series.

In the 1 shown LED tube can be operated with a conventional electronic ballast, the first connection and the second connection of the LED tube can be inserted into the socket of a fluorescent tube. The resistors R1 to R4 replace the coil filaments of the fluorescent tube. The resistors R3 and R4 may have (substantially) the same value; such a value can be chosen in the range between 0 ohms and 10 ohms.

On the basis of the values of the resistors R1 to R4, the electronic ballast can recognize that a tube (lamp) has been inserted into the socket. The electronic ballast can then supply the tube with an alternating current having a frequency (eg in the range between 10 kHz and 100 kHz, also referred to as the operating frequency). This alternating current is rectified by the diodes D1 to D4 and the rectified current (DC) is used to drive the unit 107 (ie the LEDs) to supply.

The resistor R1 is arranged in parallel to the capacitor C1, and the resistor R2 is arranged in parallel to the capacitor C2. The resistors R1 and R2 may have a value equal to a range between, for example, 100 ohms and 10 kohms, which is much larger than the values of the resistors R3 and R4. The capacitors C1 and C2 may each have a value in the range between 10 nF and 500 nF.

The supplied by the electronic ballast power is supplied mainly through the capacitors C1 and C2, which have a lower impedance compared to the impedance of the resistors R1 and R2 at the operating frequency of the ballast. This leads to a reduction of the power loss. The power flowing through the resistors R1 and R2 may be in the range of 10 mW to 200 mW; Depending on the electronic ballast part of the working current and a part of the heating current is supplied via these resistors R1 and R2.

When operated in conjunction with a magnetic ballast, the capacitors C1 and C2 provide a high impedance for the input voltage of the magnetic ballast, which is supplied at a frequency in the range of 50 Hz to 60 Hz. Thus, the current of the magnetic ballast flows across resistors R1 or R2, resulting in a high power loss in the range between 5W and 20W. Thus, resistors R1 and R2 serve as "fuse resistors": due to the high power delivered across resistors R1 and R2, at least one of them may become faulty, thereby providing a high impedance state. The resistors may be Surface Mounted Device (SMD) resistors of design size 0603, 0805 or 1206. Due to the high resistance error of the resistors R1 and R2, only a small amount of current may flow across the capacitors C1 or C2. Thus, the input power of the transfer tube can be limited to a power of, for example, less than 1W.

2 shows an alternative diagram of the conversion LED tube of 1 , In contrast to 1 a capacitor C3 is arranged in parallel to the resistor R3, and a capacitor C4 is arranged in parallel with the resistor R4. Furthermore, the unit 107 not directly connected to the rectifier, but instead to output terminals of a DC / DC converter 201 , The input terminals of the DC / DC converter 201 are connected to the output of the rectifier, ie to the node 108 and 109 ,

In the 2 embodiment shown leads to an additional increase in efficiency; each of the resistors R1 to R4 may have a value between 100 ohms and 10 k ohms. As an option, the values of resistors R1 to R4 may be (substantially) the same.

A further increase in effectiveness can be achieved on the (optional) DC / DC converter 201 based, one in 2 not shown additional capacitor for filtering out the alternating part may include the current supplied by the electronic ballast.

3 shows yet another alternative diagram of the conversion LED tube of 1 , In contrast to 1 eliminates the capacitors C1 and C2. The knot 105 between the resistors R1 and R2 is connected through a resistor R5 to a node 301 coupled. A capacitor C5 is arranged in parallel to the resistor R5.

The values of resistors R1 to R4 may be in the range of 0 ohms to 10 ohms; Optionally, the resistors R1 to R4 may have (substantially) the same value.

The value of the resistor R5 may be in the range between 100 ohms and 10 kohms (in accordance with the 1 described "fuse resistance").

The solution of 3 has the advantage that the electronic ballast determines the resistance value of the tube on the basis of the resistors R1 to R4, which simulate a more realistic resistance value of the bobbin threads of the fluorescent lamp for the electronic ballast.

The Electronic Control Gear (ECG) ballast is known for powering up and controlling the operation of the tube inserted into the socket. The LED tube may include numerous series-arranged semiconductor light elements, also referred to as an LED chain. At least one LED string may be disposed in a so-called LED tube which may be used as a conversion assembly instead of a fluorescent tube.

There is a significant difference between the fluorescent tube and the conversion LED tube: the fluorescent tube is in a non-conductive state before being ignited. However, this is not the case with the conversion LED tube: even in the case where the LEDs are not active (emit light) because the voltage applied to them is too low, so-called leakage current flows through the LEDs. Because of this difference between the retrofit LED tube and a fluorescent tube, existing ballasts may not reach their working conditions or they may have problems achieving such a working condition; they may get stuck in the start-up state, causing the conversion LED tube to not be activated. For the ballast, this leakage current appears as if the lamp is faulty, which is not actually the case for the conversion LED tube.

Thus, examples presented herein may improve the efficiency and utility of retrofit LED tubes rather than fluorescent tubes in combination with existing ballasts. The presented solution provides a high-pass characteristic, which reduces the impedance at high frequencies and increases the impedance at low frequencies (or in the case of a direct current). Thus, during normal operation, the ballast supplies a high frequency (higher frequency) current, resulting in a reduced amount of power loss through the conversion tube due to such a high pass characteristic. At start-up, an ohmic resistance (due to the low frequency of the current (or voltage) supplied by the ballast) is provided, indicating to the ballast that the lamp (here the conversion LED tube) is at its end of life (EOL) state. End of Life) has not reached; in other words, the high-pass characteristics conversion LED tube emulates a healthy fluorescent tube (with a higher impedance) during the start-up phase and a lower impedance (resulting in reduced losses) during operation.

While various embodiments of the invention have been disclosed, it will be understood by those skilled in the art that various changes and modifications can be made which will achieve some of the advantages of the invention without departing from the spirit and scope of the invention. It will be apparent to one of ordinary skill in the art that other components that perform the same functions may be suitably substituted. It should be noted that features explained with reference to a specific figure can be combined with features of other figures even in those cases in which this has not been explicitly mentioned. Furthermore, the methods of the invention may be achieved either only in software implementations, using the appropriate processor instructions, or in hybrid implementations that utilize a combination of hardware logic and software logic to achieve the same results. Such modifications to the inventive concept should be covered by the appended claims.

LIST OF REFERENCE NUMBERS

R1 to R5

resistance

D1 to D4

diode

C1 to C5

capacitor

101, 102

Pin of the first connection

103, 104

Pin of the second connection

105, 106, 108, 109, 301

node

107

A unit comprising at least one semiconductor light element

201

DC-DC converter

Claims (14)

Lighting device that Comprising at least one semiconductor light element, Comprising a first connection and a second connection, The first connection and the second connection being designed to be placed in a socket for a fluorescent tube, Wherein the first connection comprises two pins and the second connection comprises two pins, - Wherein the two pins of the first connection are coupled via at least one high-pass filter and / or wherein the first connection and the second connection are coupled via a high-pass filter. - comprising a rectifier, wherein the device further comprises a rectifier, wherein a first node between the two first resistors and a second node between the two second resistors are connected to an input of the rectifier, The device of claim 1, wherein the two pins of the first connection are coupled via two high-pass filters. The device of claim 2, wherein the two pins of the second connection are coupled via two high-pass filters. Device according to one of the preceding claims, Comprising two first resistors and two second resistors, - Wherein the two pins of the first connection are connected across the two first resistors, wherein the two first resistors are arranged in series, - Wherein the two pins of the second connection are connected across the two first resistors, wherein the two second resistors are arranged in series, Comprising a rectifier, wherein a first node between the two first resistors and a second node between the two second resistors are connected to an input of the rectifier, - comprising a unit which is connected via an output of the rectifier, wherein the unit comprises the at least one semiconductor light element. Device according to claim 4, wherein a capacitor is arranged parallel to each of the two first resistors. A device according to claim 4, wherein a capacitor is arranged in parallel with each of the two first resistors and with each of the two second resistors. Device according to one of claims 4 to 6, wherein the first node between the two first resistors via the high-pass filter and the second node between the two second resistors are connected to the input of the rectifier. Device according to one of claims 4 to 7, comprising a DC-DC converter having an input and an output, wherein the unit is connected via the output of the DC-DC converter and the input of the DC-DC converter via the output of Rectifier is switched. A device according to any one of claims 4 to 8, wherein at least one resistor on which a capacitor is arranged in parallel has a fuse functionality. The device of claim 9, wherein the fuse functionality is provided by the resistor being an SMD resistor. Device according to one of the preceding claims, wherein the semiconductor light element comprises a light emitting diode, in particular at least one chain of light emitting diodes, which are arranged in series. Device according to one of the preceding claims, wherein the semiconductor light element comprises a first chain of light emitting diodes and a second chain of light emitting diodes, each chain having an opposite orientation, wherein the first chain of light emitting diodes and the second chain of light emitting diodes are arranged parallel to each other. Device according to one of the preceding claims, wherein the device is a lamp or a lamp comprising at least one lamp. System comprising the illumination device according to one of the preceding claims and a ballast for driving the illumination device.

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