CN102269369A - Light emitting diode (LED) light source - Google Patents
Light emitting diode (LED) light source Download PDFInfo
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- CN102269369A CN102269369A CN2010101981815A CN201010198181A CN102269369A CN 102269369 A CN102269369 A CN 102269369A CN 2010101981815 A CN2010101981815 A CN 2010101981815A CN 201010198181 A CN201010198181 A CN 201010198181A CN 102269369 A CN102269369 A CN 102269369A
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Abstract
The invention relates to a light emitting diode (LED) light source used in a fixed track signal device and provided with a first LED array and a second LED array. The LED light source is constructed as current is supplied to the second LED array if a predetermined number of LEDs in the first LED array fail, so that at least one LED in the second LED array is switched on. When the at least one LED in the second LED array is switched on, visual indication of faults in the LED light source can be provided. The LED light source further comprises a plurality of lenses, the LEDs in the first LED array are aligned to the corresponding lenses with first size, and the LEDs in the second LED array are aligned to the corresponding lenses with second size, wherein the second size is different from the first size.
Description
Technical field
The present invention relates to led light source.Particularly, the present invention relates to the led light source that in fixedly alarm or index signal device (for example, trapped orbit signalling means), uses.
Background technology
The trapped orbit signalling means is used for information is passed to train driver, for example, and along whether advance safety or whether particular course has been set of a certain track.Usually information is passed to train driver with the form that difference " shows (aspects) ", described " demonstration " is the various combination and the layout of the lampion in the fixed signal device.
As used herein, term " fixed signal device " refers to its position signalling means fixing with respect to ground.Fixing sort signal device suitably, so that prevent signalling means with respect to ground motion, the especially aligning of signalling means or orientation.Therefore, for example, the trapped orbit signalling means can be installed on the pillar or gantry (gantries) that is attached to ground successively.Certainly, in the situation of track signal device, this is basic, so that security information is passed to train driver reliably.
The example of the type of the trapped orbit signalling means that relates to as the application, can discern the track signal device of two kinds of particular types: the position light signal device (also is called the ground location lamp, GPL) is usually located on the ground and in the zone such as by-track and maintenance area and uses; And lampion signalling means (CLS-also is called the multi-color cord signalling means) is located immediately on the main line usually or is positioned at main line top and is positioned at a side of main line.CLS is commonly used to control the traffic flow along one or more track of main line.
In Britain, all track signal devices that are used as CLS must meet trackage standard RT/E/S/10162 (current publication in August, 1,1999).This standard has been listed lowest term, especially reliability, color and observability.Also there is the standard that similarly is used for the track signal device in other country, for example China.
The many track signal devices that use all adopt osram lamp as light source at present.Yet, owing to have recognized that led light source has the various advantages that are better than osram lamp, so led light source (that is the light source that, comprises a plurality of LED) is used more and more.For example, it has been generally acknowledged that led light source is more more reliable than osram lamp.
Most of rail networks utilize condition monitoring system to monitor the state of the light source of trapped orbit signalling means.Typical condition monitoring system comprises condition monitoring device and is used for condition monitoring device is connected to many conducting wires of the light source of trapped orbit signalling means.Each light source comprises the telecommunication circuit that is used for the information about the light source state is passed to condition monitoring system, and for example, this information is the form of alarm signal when breaking down in the light source.Sometimes, this telecommunication circuit is called as " check " circuit.
In use, the telecommunication circuit of light source and the conducting wire of condition monitoring system couple, thereby the telecommunication circuit of light source can be passed to condition monitoring system with the information about the light source state.Therefore, if break down in the light source, this information can be passed to condition monitoring device, thereby can send the engineer to keep in repair light source.
Because the reliability of being recognized, the led light source that uses in the trapped orbit signalling means at present only comprises a led array usually.Make led light source produce two kinds of different colors if desired, then led light source can comprise a more than led array, a kind of color that each array is used to wish.
The inventor observes, and the led light source that uses on railway network at present is not designed to the inefficacy of each LED in the compensation LED light source.On the contrary, the led light source that seems to use on railway network at present is based on only there being a small amount of LED will lose efficacy (in this case, with light output that can not the appreciable impact led light source) hypothesis design, or design based on will the lose efficacy hypothesis of (light source need change) in this case, of whole LED light source.
The inventor also observes, that uses in led light source at present will be passed to the telecommunication circuit of condition monitoring system about the information of led light source state, in the light output of led light source, occur after obviously minimizing or whole the minimizing, promptly when led light source does not produce the light output of expection, only alarm signal is passed to external monitoring equipment with the fault in the indication LED light source.
Summary of the invention
The present invention designs according to above-mentioned consideration.
Usually, a first aspect of the present invention provides a kind of led light source with first led array and second led array, if this led light source is configured to have in first led array LED of predetermined quantity to lose efficacy, then supply electric current, so that connect at least one LED in second led array to second led array.By connecting at least one LED in second led array, this led light source can compensate any minimizing by the light that inefficacy the caused output of the LED in first led array at least in part.Therefore, this led light source is made more reliably.
Therefore, a first aspect of the present invention can provide a kind of led light source, and it has: first led array that comprises a plurality of LED; Second led array that comprises a plurality of LED, each LED in first and second led array relative to each other locatees, if so that each LED in first and second led array provides synthetic light output when connecting; Be used to control the control circuit of the electric current supply of first and second led array; Wherein, control circuit is constructed to control the electric current supply to first and second led array, thereby meets the following conditions when the operation led light source:
(i) before any LED in first led array lost efficacy, connect the LED in first led array and disconnect LED in second led array; And
If (ii) the LED of predetermined quantity lost efficacy in first led array, then connect at least one LED in second led array.
In the context of the present invention, when the output of the light of LED is zero substantially, even when cross-over connection one voltage on this LED (for example, break over voltage or connect voltage), this LED may " inefficacy ".This inefficacy may be unexpected or gradually.Though it is the catastrophic failure of LED is relatively more rare in some application scenarios, more common in fixedly alarm or index signal device (for example, trapped orbit signalling means), wherein, temperature can change between very cold (for example ,-40 ℃) and very hot (for example ,+70 ℃).
If the LED of predetermined quantity lost efficacy in first led array, then by connecting at least one LED in second led array, can compensate any minimizing at least in part by the light of first led array that inefficacy the caused output of the LED of predetermined quantity in first led array by the light of second led array output.Therefore, this led light source is made more reliably.
Preferably, connect at least one LED in second led array, make the LED of in first led array predetermined quantity equate substantially by the LED of predetermined quantity in (synthesize) light of led light source output and first led array (synthesizing) light exported by led light source before that lost efficacy after losing efficacy.Light by led light source output before the LED of predetermined quantity lost efficacy in first led array can be, for example, measured light is not exported when having LED to lose efficacy in first led array or when lack one LED inefficacy than predetermined quantity in first led array.
In the present context, " equal substantially " preferably represent less than by 50% of the variation of (synthesizing) light of led light source output, less than 40% of this variation, and less than 30% of this variation, less than 20% of this variation, or less than 10% of this variation.
For integrality, point out the output of available light meter (for example, 8 meters light platforms (light bench)) measuring light.Available for example candela and/or the measuring light output of lux unit.Can carry out the light output of light source and read, and be recorded in light source for example and be installed on wherein the fixed signal device.
For integrality, point out that the electric current supply can originate from any current source equally, it needs not to be constant-current source.
The fixed signal device that light source is installed on wherein can comprise the cover that is used for light source and ambient light shield.Light meter can be mounted to the cover of light source, so that the output of the light of measurement light source.Light meter can be used to monitor/any minimizing in the light output of measurement light source.
Preferably, the connection of at least one LED in second led array (preferably all LED see below) provides the fault in the led light source visual indication, and this fault refers to the inefficacy of the LED of the predetermined quantity in first led array.
Yet the inventor has been noted that this visual indication may be difficult to see in practice, if especially after breaking down by the light of led light source output with break down before the light exported by led light source equate substantially.
Therefore, preferably, this led light source comprises a plurality of lens, each LED in first led array is relevant with the respective lens with first size, more preferably aim at it, and each LED in second led array is relevant with the respective lens with second size, more preferably aims at it, and second size is preferably different with first size.Like this, the visual indication that is provided by the LED in second led array of connecting can be provided lens, and this is because when the lens alignment of LED in those arrays and different size, sees which array which LED belongs to easilier.
Preferably, led light source comprises telecommunication circuit, if connect at least one LED in second led array, this telecommunication circuit will be passed to condition monitoring system (for example, foregoing condition monitoring system) about the information of led light source state.This telecommunication circuit can alarm form transmit this information so that the fault in the indication LED light source (this fault refers to the inefficacy of the LED of the predetermined quantity in first led array).Advantageously because second led array can compensate the inefficacy of the LED in first led array, so telecommunication circuit can send this alarm, by the light of led light source output with break down before can marked change by the light of led light source output.
As noted above, the LED in first and second led array relative to each other locatees, if so that the LED in first and second led array provides synthetic light output when connecting.Preferably, this realizes that by the LED in first led array being positioned between the LED in second led array vice versa, to form synthetic led array.For example, synthetic led array can be installed on the single circuit board.
Preferably, if the LED of predetermined quantity lost efficacy in first led array, then all LED in second led array connect.Therefore, above-mentioned condition (ii) preferably becomes: if (ii) in first led array LED of predetermined quantity lost efficacy, then all LED in second led array connect.Like this, the light by the output of the LED in second led array can be evenly distributed in the synthetic light output of led light source.
Preferably, control circuit further is configured to, if lost efficacy more than the LED of predetermined quantity in first led array, then the quantity by the LED that had lost efficacy in the light of second led array output and first led array as one man increases.Therefore, control circuit preferably further is configured to control the electric current supply of first and second led array, thereby when following additional conditions are satisfied in operation during light source: if (iii) in first led array LED more than predetermined quantity lost efficacy, then the quantity by the LED that had lost efficacy in the light of second led array output and first led array as one man increases.Like this, second led array helps to compensate at least in part any further minimizing of the light output that the inefficacy by other LED in first led array causes.Light by the output of second led array can continue to increase to the many degree of being exported by first led array by the light ratio of second led array output of light.Light by the output of second led array can continue to increase to the maximum that no longer further increases.
If have LED to lose efficacy again in the LED of the predetermined quantity inefficacy and first led array in first led array, if all LED in second led array connect, then be supplied to the electric current of second led array by increase, by the light of second led array output preferably with first led array in the quantity of the LED that lost efficacy as one man increase.Like this, from being stably to transformation, that is, make the quality of synthetic light output of signalling means can obviously not reduce by the state of the more light of second led array output by the state of the more light of first led array output.This steady transformation can be described as " gradual change ".
Preferably, a plurality of LED in each led array are connected in series.More preferably, a plurality of LED in each led array are connected in series, and each LED in the led array is relevant with corresponding bypass elements, if LED lost efficacy, bypass elements allows to get around this LED.
Preferably, the breakdown voltage that has of each bypass elements is greater than the break over voltage of associated LED.Preferably, each bypass elements is Zener diode (preferably, being the reverse biased Zener diode).Thus, notice that the reverse biased Zener diode typically has 5 volts breakdown voltage, greater than the typical break over voltage (normally about 2 volts) of LED.
For fear of query, the voltage when " turnover " voltage finger of LED leads to LED (that is, beginning is luminous) on this LED.
In some preferred implementations, first led array and second led array are connected in parallel.More preferably, first led array and second led array are connected in parallel, and the quantity of the LED in first led array is less than the quantity of the LED in second led array.Have in first led array than more LED in second led array and have such advantage: it is lower than voltage that to connect LED in second led array required to connect the required voltage (if there is not LED to lose efficacy in first led array, then this voltage is the summation of the break over voltage of each LED in first led array) of LED in first led array.This simple-arranged helps to realize satisfying above-mentioned condition (i), (ii) and led light source (iii), below with reference to the specific embodiment of the present invention explanation reasons.
Control circuit can comprise one or more control resistors.
One or more control resistors can for example in series couple with the component that is formed by first and second led array that are connected in parallel.One or more control resistors can form the part of arbitrary led array.Use one or more this control resistors can help controlling voltage on first and second led array that are connected in parallel, and the electric current of two led array of flowing through can help to realize satisfying above-mentioned condition (i), (ii) and led light source (iii), below with reference to the specific embodiment of the present invention explanation reasons.
Preferably, this control circuit is constructed to cross-over connection one substantially invariable voltage on first and second led array that are connected in parallel.Preferably, this control circuit this substantially invariable voltage of cross-over connection on first and second led array that are connected in parallel and one or more control resistor.Therefore one or more control resistors can be controlled the voltage on first and second led array, can help to realize satisfying above-mentioned condition (i), (ii) and led light source (iii), below with reference to the specific embodiment of the present invention explanation reasons.
As explained above, for simply, it is favourable that first led array and second led array are connected in parallel, and the quantity of the LED in first led array is less than the quantity of the LED in second led array.Yet other layout is feasible equally.
For example, in some embodiments, control circuit can comprise the first control circuit of the electric current supply that is used to control first led array and be used to control the second control circuit of the electric current supply of second led array.This control circuit can further comprise and be used for the sensing element that sensing is supplied to the electric current of first led array, and second control circuit is constructed to based on the output control of the sensing element electric current supply to second led array.By this layout, if the LED of predetermined quantity lost efficacy in first led array, then the electric current supply by second control circuit being configured to control second led array can obtain to satisfy condition (i) to connect at least one LED (preferably, all LED) in second led array, (ii) and led light source (iii).Yet this arranges the more parts of describing in the above-mentioned preferred implementation of needs.
Usually, a second aspect of the present invention provides a kind of led light source with at least one led array, wherein, just provide visual indication if the LED in described at least one led array is arranged as to break down in the LED signalling means light source, after breaking down by the light of led light source output with break down before the light exported by led light source equate substantially.
Like this, the observer of led light source (for example, Maintenance Engineer) detects the fault in the led light source before can occur obviously reducing or reducing fully in the light output of led light source.
Therefore, a second aspect of the present invention can provide a kind of led light source, and it has: at least one led array that comprises a plurality of LED; Wherein, the visual indication of the fault that provides in the led light source is provided the LED in described at least one led array, after breaking down by the light of led light source output with break down before the light exported by led light source equate substantially.
In the present context, " equal substantially " preferably represent less than by 50% of the variation of the light of led light source output, less than 40% of this variation, and less than 30% of this variation, less than 20% of this variation, or less than 10% of this variation.
For integrality, point out that European patent application publication No. EP 1324641 and division EP 1874098 thereof disclose a kind of led light source, wherein, each LED is arranged as the visual indication that the fault in the LED signalling means light source is provided.Yet, the disclosed led light source of these patent applications only just provides visual indication when the led array control electronic component of led array (or be used for) is entirely ineffective, therefore, this visual indication only just provides when 50% depart from appears in the light of led light source output at least.
Led light source can comprise the control circuit that is used to control to the electric current supply of described at least one led array.Can this control circuit be discussed with reference to a first aspect of the present invention.
Preferably, this visual indication is such, only can see this visual indication from the distance of about about about 10 meters, 5 meters, about 4 meters, 3 meters, about 2 meters or about 1 meter.This has following advantage: this visual indication produces minimum influence to the use of led light source, but can see (for example, by the engineer) in short distance, just can not find fault thereby do not take out light source.
Preferably, led light source has first led array that comprises a plurality of LED and second led array that comprises a plurality of LED, each LED in first and second led array relative to each other locatees, if so that provide synthetic light output when connecting LED in first and second led array.
Here, fault may be the inefficacy of the LED of the predetermined quantity in first led array, and visual indication provides by at least one LED in second led array of connecting, as describing in conjunction with a second aspect of the present invention.
Preferably, led light source comprises a plurality of lens, each LED in first led array is relevant with the respective lens with first size, more preferably aim at it, and each LED in second led array is relevant with the respective lens with second size, more preferably aim at it, second size preferably is different from first size.Like this, the visual indication that is provided by the LED in second led array of connecting can be provided lens, and this is because when the lens alignment of LED in those arrays and different size, sees which array which LED belongs to easilier.
Led light source according to any aspect of the present invention can comprise housing.This housing can be used for holding the various elements of led light source, for example, and one or more led array, control circuit etc.
Led light source according to any aspect of the present invention can fixedly use in alarm or the index signal device (for example, trapped orbit signalling means).
Led light source according to any aspect of the present invention can have first led array and second led array, wherein, and the LED generation in first led array and the light of the LED same color in second led array.
Another aspect of the present invention can be provided for being mounted to fixed support structure so that the signal element of fixedly alarm or index signal device to be provided, and this signal element has: at least one aforesaid led light source; And be used for signal element is installed in erecting device on the fixed support structure.This signal element can comprise, for example, is used to be positioned at the corresponding lid of each led light source on the housing of signal element.
Another aspect of the present invention can provide a kind of fixed signal device, and it comprises the above-mentioned signal element that is mounted to fixed support structure.This fixed support structure can be, for example, and pillar or gantry.
The present invention also comprises any combination of described aspect and preferred feature, except this combination obviously unallowed or clearly to avoid.
Description of drawings
The embodiment that we propose is discussed with reference to the accompanying drawings, in the accompanying drawing:
Fig. 1 is the partial circuit figure of first embodiment of the led light source that uses in the trapped orbit signalling means.
Fig. 2 shows the diagrammatic sketch of the electric current of first led array of the led light source shown in Figure 1 of flowing through and second led array.
Fig. 3 shows the block diagram of second embodiment of the led light source that uses in the trapped orbit signalling means.
Fig. 4 is a circuit diagram of realizing led light source shown in Figure 3.
Fig. 5 a shows the lens arra that comprises a plurality of lens that uses with led light source.
Fig. 5 b is the cross section by the line G-G shown in Fig. 5 a.
Fig. 5 c is the cross section by the line H-H shown in Fig. 5 a.
The specific embodiment
Fig. 1 shows first embodiment of the led light source 101 that uses in the trapped orbit signalling means.
Led light source 101 comprises: first led array 110 and second led array 120 that comprises a plurality of LED that comprise a plurality of LED.First led array 110 and second led array 120 are connected in parallel.
Though not shown in Figure 1, each LED in first and second led array 110,120 relative to each other locatees, if so that each LED in first and second led array provides synthetic light output when connecting.
Led light source 101 also comprises control circuit, and this control circuit does not illustrate in Fig. 1 fully, but comprises first control resistor 108 and second control resistor 126.First control resistor 108 is connected in series with the component that is formed by first led array 110 that is connected in parallel and second led array 120.Second control resistor 126 forms the part of second led array.In this example, the voltage of control circuit not shown in Figure 1 one 100 volts of cross-over connections on first and second led array 110,120 that are connected in parallel and control resistor 108,126.In use, control resistor 108,126 help on control first and second led array 110,120 voltage and by their electric current, as below describing in more detail.
As shown in Figure 1, a plurality of LED in a plurality of LED in first led array 110 and second led array 120 are connected in series, each LED is relevant with the corresponding bypass elements of reverse biased Zener diode form, if LED lost efficacy, then described bypass elements allows to get around LED.
Though not shown in Figure 1, the quantity of the LED in first led array 110 preferably is less than the quantity of the LED in second led array 120.In this example, 30 LED are arranged in first led array 110, and 32 LED are arranged in second led array 120.Yet, will consider that as the technical staff LED of other quantity in arbitrary led array is feasible equally.
Suppose not have LED to lose efficacy, the required voltage of connecting in first led array 110 of LED is the summation of the break over voltage (breakovervoltage) of each LED in first led array 110.For typical LED, break over voltage is about 2 volts.Therefore, before any LED in first led array 110 lost efficacy, the required voltage of connecting in first led array 110 of 30 LED will be about 60 volts (30 * 2 volts).Similarly, the required voltage of connecting in second led array 120 of 32 LED will be about 64 volts (32 * 2 volts).
Therefore, before any LED in first led array 110 lost efficacy, connecting the required voltage ratio of LED in second led array, to connect the required voltage of LED in first led array big.
In use, before any LED in first led array 110 lost efficacy, control resistor 108,126 is configured to control voltage on first led array 110 and second led array 120, make voltage on the led array 110 of winning greater than the required voltage of connecting in first led array 110 of LED, and the voltage on second led array 120 is less than the required voltage of connecting in second led array 120 of LED.Therefore, before any LED in first led array 110 lost efficacy,, thereby connect each LED in first led array 110 and disconnect each LED in second led array 120 only to first led array, 110 supply electric currents.
If a LED in first led array 110 lost efficacy, then relevant with this LED reverse biased Zener diode will provide current bypass to this LED.Yet the voltage of a reverse biased Zener diode will remain the breakdown voltage of this Zener diode, normally about 5 volts.This has the effect that makes the required voltage of connecting in first led array of LED increase about 3 volts (5 volts-2 volts).Such result is that the electric current of first led array 110 of flowing through will reduce, so also will be reduced by the light of first led array, 110 outputs.This effect is shown in Figure 2, and Fig. 2 illustrates: after the LED in first led array 110 lost efficacy, the electric current of first led array 110 of flowing through reduced.
When other LED in first led array 110 lost efficacy, the required voltage of connecting in first led array 110 of LED (except the LED that lost efficacy) will continue to increase, and the electric current of first led array 110 of flowing through reduces continuing, light by 110 outputs of first led array also will continue to reduce thus, and reason was described.In this process, the voltage on first led array 110 and second led array 120 will increase.
Therefore, after the LED of the predetermined quantity in first led array 110 lost efficacy, the voltage on second led array 120 will increase to the degree of the voltage required above the LED in connection second led array 120.At this some place, electric current is supplied to second led array with beginning, so that connect all LED in second led array 120.This effect is shown in Figure 2, and Fig. 2 illustrates: for light source shown in Figure 1, if there are four LED to lose efficacy in first led array 110, just to second led array, 120 supply electric currents.
As skilled in the art will appreciate, the predetermined quantity of LED in first led array 110 that needs to lose efficacy before the LED in connecting second led array 120 will be determined by many factors, comprise: the size of constant voltage, first and second control resistors 108 and 126 resistance, the quantity of the LED in first led array 110, the quantity of the LED in second led array 120, the break over voltage of each LED in first and second led array 110 and 120 and the breakdown voltage of Zener diode.
If there is LED to lose efficacy in first led array 110 more than predetermined quantity, then consistent with the quantity of the LED that lost efficacy in first led array 110, the electric current that is supplied to second led array 120 will increase and will be increased by the light of second led array, 120 outputs thus, up to by the light ratio of second led array, 120 outputs by the degree more than the light of first led array, 110 outputs.This effect is shown in Figure 2, and Fig. 2 illustrates: have in first led array 110 after five LED inefficacies, the electric current that is supplied to second led array 120 surpasses the electric current that is supplied to first led array 110.
Finally, the electric current of second led array 120 of flowing through reaches maximum, even there is LED to lose efficacy in first led array 110 again, this value can not increase yet.This effect is shown in Figure 2, and Fig. 2 illustrates: when having six LED to lose efficacy in first led array 110, the electric current that is supplied to second led array 120 increases to maximum.At this some place, connect the required voltage of LED in first led array 110 greatly to no longer to the degree (see figure 2) of the supply of the LED in first led array electric current.
Therefore, in use, the control circuit of led light source 101 is configured to control electric current supply to first and second led array 110,120, thereby when the operation led light source, meets the following conditions:
(i) before any LED in first led array 110 lost efficacy, connect the LED in first led array 110 and disconnect LED in second led array 120;
If (ii) the LED of predetermined quantity lost efficacy in first led array 110, then connect at least one LED in second led array 120; And
If (iii) lost efficacy more than the LED of predetermined quantity in first led array 110, then the quantity by the LED that had lost efficacy in the light of second led array, 120 outputs and first led array as one man increases.
Preferably, connect the LED in second led array, make the LED of in first led array 110 predetermined quantity equate substantially by the LED of predetermined quantity in (synthesize) light of led light source 101 outputs and first led array (synthesizing) light exported by led light source before that lost efficacy after losing efficacy.In the present context, " equal substantially " preferably represent less than by 50% of the variation of (synthesizing) light of led light source output, less than 40% of this variation, and less than 30% of this variation, less than 20% of this variation, or less than 10% of this variation.
Because if the LED in second led array 120 is just connected in the LED of predetermined quantity inefficacy in first led array 110, so all LED that connect in second led array 120 provide the visual indication of fault in the led light source, this fault refers to the inefficacy of the LED of predetermined quantity in first led array.
Preferably, led light source 101 (for example comprises a plurality of lens, the lens arra of Fig. 5 a), each LED in first led array 110 is relevant with the respective lens with first size, more preferably aim at it, and each LED in second led array 120 is relevant with the respective lens of second size that is different from first size, more preferably aims at it.Like this, the visual indication that is provided by the LED in second led array of connecting 120 can be provided lens, and this is because when the lens alignment of LED in those arrays and different size, see which array which LED belongs to easilier.
Preferably, led light source 101 comprises the telecommunication circuit (not shown), if connect the LED in second led array 120, this telecommunication circuit will be passed to condition monitoring system (also not shown) about the information of led light source 101 states.This telecommunication circuit can alarm form transmit this information so that indicate the LED of existing predetermined quantity in first led array 110 to lose efficacy.Except above-mentioned visual indication, also preferably transmit this alarm.
Fig. 3 shows second embodiment of the led light source 201 that uses in the trapped orbit signalling means.
In led light source shown in Figure 3 201, control circuit comprises the first control circuit of the electric current supply that is used to control first led array 210 and is used to control the second control circuit of the electric current supply of second led array 220.
The same with led light source 101 shown in Figure 1, first led array 210 comprises a plurality of LED (for example, 32 LED), and each among an a plurality of LED all bypass elements with reverse biased Zener diode (not shown, but Fig. 4 as seen) form is relevant.Similarly, second led array 220 comprises a plurality of LED (for example, 37 LED), and each a LED bypass elements with reverse biased Zener diode (same, not shown, but Fig. 4 as seen) form is relevant.
First control circuit comprises voltage regulator 206a and control resistor 216a, 216b.Second control circuit comprises voltage regulator 206b and control resistor 226a, 226b.Provide the alternating current supply via input filter 202 and two voltage rectifier 204a, 204b to control circuit, so that provide the voltage of rectification in first and second control circuits each.
Arrange that sensing element 232 comes sensing to be supplied to the electric current of first led array 210.Second control circuit is constructed to based on the electric current supply of the output of sensing element 232 control to second led array 220, thereby meets the following conditions when operating led light source:
(i) before any LED in first led array 210 lost efficacy, connect the LED in first led array 210 and disconnect LED in second led array 220;
If (ii) the LED of predetermined quantity lost efficacy in first led array 210, then connect at least one LED in second led array 220; And
If (iii) lost efficacy more than the LED of predetermined quantity in first led array 210, then the quantity by the LED that had lost efficacy in the light of second led array, 220 outputs and first led array as one man increases.
As shown in Figure 3, output control 240, output switch 242 and output filter 244 combinations provide the state output of led light source 201.
Other feature similarities of other features of led light source 201 shown in Figure 3 and led light source 101 shown in Figure 1, and do not need to discuss in further detail.
Fig. 4 shows the circuit diagram of realizing led light source 201 shown in Figure 3.
Fig. 5 a shows the lens arra that comprises a plurality of lens 301 that uses with led light source, led light source 101 for example shown in Figure 1 or led light source 201 shown in Figure 3.
Shown in Fig. 5 a, lens arra 301 comprises the lens of two kinds of different sizes,, has the lens 302 of first size and the lens 304 with second size (in this case less than first size) that is different from first size that is.
When using with Fig. 1 or led light source shown in Figure 3, each LED in first led array preferably aims at the lens with first size, and each LED in second led array preferably aims at the lens with second size, for example, as mentioned above with reference to led light source 101 shown in Figure 1.Different lens sizes helps to strengthen the visual indication of fault that is provided by the LED in second led array of connecting, and is for example, as above described with reference to led light source 101 shown in Figure 1.
When using in this specification and claims, term " comprises " and " comprising " and modification thereof represent to comprise specific feature, step or integral body.Should be with feature, step or the whole existence of this terminological interpretation for getting rid of other.
In the foregoing description or in claims or disclosed in the accompanying drawings, express with its particular form, or according to the device that is used to carry out disclosed function, or be used to obtain disclosed result's the method or the feature of technology, suitably can distinguish or come to realize the present invention with its various forms with any combination of these features.
Though the present invention has been described in conjunction with above-mentioned exemplary embodiment,, when providing this disclosure, many equivalent modifications and modification will be conspicuous for a person skilled in the art, and can not deviate from disclosed generalized concept.Therefore, be intended that, only by the claims restriction, explain, and can't help embodiment restriction described herein as reference specification and accompanying drawing in the scope of the patent of this mandate.
Therefore, though for example understand the present invention with reference to the led light source that uses in the trapped orbit signalling means, identical principle can be used to make the led light source that is suitable for use in other environment (for example, highway transportation).
Claims (25)
1. led light source has:
First led array comprises a plurality of LED;
Second led array comprises a plurality of LED, and the LED in described first and second led array relative to each other locatees, if so that synthetic light output is provided when connecting LED in described first and second led array;
Control circuit is used to control the electric current supply to described first and second led array;
Wherein, described control circuit is constructed to control the electric current supply to described first and second led array, thereby meets the following conditions when the operation led light source:
(i) before any LED in described first led array lost efficacy, connect the LED in described first led array and disconnect LED in described second led array; And
If the LED of predetermined quantity lost efficacy in (ii) described first led array, then connect at least one LED in described second led array.
2. led light source according to claim 1, wherein, connect at least one LED in described second led array, the light that makes the LED of the predetermined quantity in described first led array be exported by led light source before being lost efficacy by the LED of the predetermined quantity in the light of led light source output and described first led array after losing efficacy equates substantially.
3. led light source according to claim 1 and 2, wherein, the connection of described at least one LED in described second led array provides the visual indication of the inefficacy of the LED of predetermined quantity in described first led array.
4. according to each described led light source in the aforementioned claim, comprise a plurality of lens, each LED in described first led array aims at the respective lens with first size, and each LED in described second led array aims at the respective lens with second size, and second size is different with first size.
5. according to each described led light source in the aforementioned claim, wherein, described led light source comprises telecommunication circuit, if connect at least one LED in described second led array, described telecommunication circuit is used for the information about the state of described led light source is passed to condition monitoring system.
6. according to each described led light source in the aforementioned claim, wherein,, then connect all LED in described second led array if the LED of predetermined quantity lost efficacy in described first led array.
7. according to each described led light source in the aforementioned claim, wherein, described control circuit further is configured to control the electric current supply to described first and second led array, thereby satisfies following additional conditions when the described led light source of operation:
If lost efficacy more than the LED of predetermined quantity in (iii) described first led array, then the quantity by the LED that had lost efficacy in the light of described second led array output and described first led array as one man increases.
8. according to each described led light source in the aforementioned claim, wherein, a plurality of LED in each led array are connected in series, and each LED in the led array is relevant with corresponding bypass elements, if LED lost efficacy, described bypass elements allows to get around this LED.
9. led light source according to claim 8, wherein, each bypass elements is the reverse biased Zener diode.
10. according to each described led light source in the aforementioned claim, wherein, described first led array and described second led array are connected in parallel, and the quantity of the LED in described first led array is less than the quantity of the LED in described second led array.
11. led light source according to claim 10, wherein, described control circuit comprises one or more control resistors, and described control resistor in series couples with the component that is formed by described first and second led array that are connected in parallel.
12. according to claim 10 or 11 described led light sources, wherein, described control circuit is constructed to cross-over connection one substantially invariable voltage on described first and second led array that are connected in parallel, and this substantially invariable voltage of cross-over connection on described first and second led array that are connected in parallel and one or more control resistor alternatively.
13. according to each described led light source in the aforementioned claim, wherein, described control circuit comprises the first control circuit and the second control circuit that is used to control to the electric current supply of described second led array that is used to control to the electric current supply of described first led array.
14. led light source according to claim 13, wherein, described control circuit comprises and is used for the sensing element that sensing is supplied to the electric current of described first led array, and described second control circuit is constructed to control electric current supply to described second led array based on the output of described sensing element.
15. a led light source has:
At least one led array comprises a plurality of LED;
Control circuit is used to control the electric current supply to described at least one led array;
Wherein, the LED in described at least one led array is arranged to provide the visual indication of the fault in the described led light source, after breaking down by the light of described led light source output with break down before the light exported by led light source equate substantially.
16. led light source according to claim 15, wherein, described visual indication only makes and can see from the distance of about about about 10 meters, 5 meters, about 4 meters, 3 meters, about 2 meters or about 1 meter.
17. according to claim 15 or 16 described led light sources, wherein, described led light source has first led array that comprises a plurality of LED and second led array that comprises a plurality of LED, LED in described first and second led array relative to each other locatees, if so that provide synthetic light output when connecting LED in described first and second led array.
18. led light source according to claim 17, wherein, described fault refers to the inefficacy of the LED of the predetermined quantity in described first led array, and described visual indication is provided by at least one LED in described second led array of connecting.
19. according to each described led light source in the claim 15 to 18, wherein, described led light source comprises a plurality of lens, each LED in described first led array aims at the respective lens with first size, and each LED in described second led array aims at the respective lens with second size, and second size is different with first size.
20., comprise the housing of the one or more led array that are used to hold described led light source according to each described led light source in the aforementioned claim.
21. according to each described led light source in the aforementioned claim, wherein, described led light source is fixedly using in alarm or the index signal device.
22. according to each described led light source in the aforementioned claim, wherein, described led light source has first led array and second led array, wherein, and the LED generation in described first led array and the light of the LED same color in described second led array.
23. one kind is used to be mounted to fixed support structure so that the signal element of fixedly alarm or index signal device to be provided, described signal element has:
At least one is according to each described led light source in the aforementioned claim; And
Erecting device is used for described signal element is installed in described fixed support structure.
24. a fixed signal device comprises the signal element that is mounted to fixed support structure according to claim 23.
25. fixed signal device according to claim 24, wherein, described fixed support structure is pillar or gantry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101981815A CN102269369A (en) | 2010-06-04 | 2010-06-04 | Light emitting diode (LED) light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101981815A CN102269369A (en) | 2010-06-04 | 2010-06-04 | Light emitting diode (LED) light source |
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| Publication Number | Publication Date |
|---|---|
| CN102269369A true CN102269369A (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101981815A Pending CN102269369A (en) | 2010-06-04 | 2010-06-04 | Light emitting diode (LED) light source |
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| CN (1) | CN102269369A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015002034A (en) * | 2013-06-14 | 2015-01-05 | フェニックス電機株式会社 | Led lamp |
| JP2018182049A (en) * | 2017-04-12 | 2018-11-15 | Ｚｉｇｅｎライティングソリューション株式会社 | Light-emitting device and illuminating device |
-
2010
- 2010-06-04 CN CN2010101981815A patent/CN102269369A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015002034A (en) * | 2013-06-14 | 2015-01-05 | フェニックス電機株式会社 | Led lamp |
| US9148926B2 (en) | 2013-06-14 | 2015-09-29 | Phoenix Electric Co., Ltd. | LED lamp |
| JP2018182049A (en) * | 2017-04-12 | 2018-11-15 | Ｚｉｇｅｎライティングソリューション株式会社 | Light-emitting device and illuminating device |
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Application publication date: 20111207 |