CN101592702A - The caution system of light emitting diode and method - Google Patents
The caution system of light emitting diode and method Download PDFInfo
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- CN101592702A CN101592702A CN 200810098718 CN200810098718A CN101592702A CN 101592702 A CN101592702 A CN 101592702A CN 200810098718 CN200810098718 CN 200810098718 CN 200810098718 A CN200810098718 A CN 200810098718A CN 101592702 A CN101592702 A CN 101592702A
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Abstract
The invention provides a kind of caution system of light emitting diode, comprise luminescence unit, pick-up unit and alarming device.Described luminescence unit is made up of a plurality of micrinite.Described pick-up unit is in order to detecting described luminescence unit, and the output testing result.Described alarming device shows the damaged condition of the micrinite in the described luminescence unit according to described testing result.
Description
Technical field
The present invention relates to the caution system and the method for light emitting diode, particularly have the caution system and the method for the light emitting diode of light emitting diode useful life detection.
Background technology
Light emitting diode (Light Emitting Diode, LED), because it is long to have high vibration strength (shockresistance), life-span, power consumption is few simultaneously, the heating degree is little, so its range of application spreads all over the every articles for use in the daily life, as the pilot lamp of tame electrical article and various instrument or light source etc.In recent years, along with white light type light emitting diode (White Light-Emitting Diode, WLED) appearance, LED is broken away from over can only be used in occasions such as indication cresset, rainbow lamp decoration, beginning strides forward toward the electrical lighting field, comprise the direction auxiliary lamp of automobile, the flashlamp of digital camera etc., more can replace incandescent lamp and fluorescent light future, throw light on as the principal home front yard.
General traditional LED sees through a P/N interface (junction) to come luminously, if on the P/N interface defective takes place, then causes current concentration easily and burns LED.But, LED in use for some time, therefore the brightness meeting reduces gradually, need strengthen current drives, make the luminosity of LED can keep necessarily, but this increases the probability of burning LED again.In addition, LED only can replace when damaging at present, can not learn the damaged condition of LED in advance, in order to as considering of replacing in advance, concerning the user, is that inconvenience and increase are dangerous.For instance, the assembly of all securities of vehicle, as oil mass and water temperature and air bag, pilot lamp is nearly all arranged on instrument panel, though car light also has open circuit caution cresset, but all be to show just that when light source complete failure just the user may experience the period that the light requirement source does not but have light source.If occur on red signal lamp used by rail workers and the railway signal lamp, it is dangerous just higher, in existing LED and the conventional light source, especially LED is because semiconductor material characteristic, light output all is to descend gradually in use, and according to serviceability temperature difference and ambient condition, the real life-span of each LEDs all is accurately to estimate with going out light state, general complete failure all takes place in use, though be used for some inconvenience of general illumination, still can accept, if be used for the light source of safety or signal great danger just be arranged, as car light and red signal lamp used by rail workers and railway signal lamp.
Summary of the invention
Of the present inventionly provide a kind of caution system and method with light emitting diode that light emitting diode useful life detects.
The system that the present invention also can provide a kind of led light source useful life to detect, that is to say led light source brightness do not descend with complete failure before, the Presentation Function of the effective number percent signal of early warning pilot lamp or crystal grain is provided.
The present invention also can provide a kind of caution system of light emitting diode, comprises luminescence unit, pick-up unit and alarming device.Described luminescence unit is made up of a plurality of micrinite.Described pick-up unit is in order to detecting described luminescence unit, and the output testing result.Described alarming device shows the damaged condition of the micrinite in the described luminescence unit according to described testing result.
Description of drawings
Fig. 1 is the structural representation of LED micrinite.
Fig. 2 A～2F is the micrinite number that lost efficacy in the AC LED and the V-I-W synoptic diagram of AC LED.
Fig. 3 is illustrated under the driving of deciding electrical voltage system, AC LED micrinite failure properties rate of change figure.
Fig. 4 is the calcspar according to an embodiment of the display system of light emitting diode of the present invention.
Fig. 5 is the calcspar according to another embodiment of the display system of light emitting diode of the present invention.
Fig. 6 is the calcspar according to an embodiment of the caution system of the light emitting diode with alarming device of the present invention.
Fig. 7 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.
Fig. 8 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.
Fig. 9 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.
Figure 10 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.
Figure 11 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.
Figure 12 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.
Figure 13 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.
Figure 14 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.
Each description of reference numerals in the accompanying drawing is as follows:
21～voltage, 81～LED unit
22～electric current, 82～the first voltage sources
23～power, 83～variable power detection device
31～single PN connects face LED failure curve 84～alarming device
32～power, 85～photo-coupler
33～luminous flux, 86～the second voltage sources
34～conversion ratio, 101～LED unit
41～voltage source, 102～voltage source
42～variable resistor, 103～amplifying circuit
43～LED unit, 104～controller
44～photodetector, 105～display device
51～controller, 111～LED unit
52～current source, 112～voltage source
53～LED unit, 113～controller
54～photodetector, 114～scrambler
61～LED unit, 115～code translator
62～voltage source, 116 monitoring units
63～pick-up unit, 117～alarming device
64～alarming device, 121～LED unit
71～LED unit, 122～voltage source
72～voltage source, 123～alarming device
73～variable power detection device, 131～LED unit
74～alarming device, 132～voltage source
75～current-limiting resistance, 133～inductance
76～display unit, 134～alarming device
135～current-limiting resistance, 142～voltage source
136～display unit, 143～variable power detection device
141～LED unit, 144～alarming device
Embodiment
Fig. 1 is the structural representation of LED micrinite.Led chip shown in Fig. 1 can be AC LED or high voltage direct current LED.On led chip, LED is divided into the dozens of micrinite earlier, electric connection forms again, therefore also is divided into the dozens of block fully on the chip defect feature, does not have chain effect in parallel.When having a micrinite to lose efficacy on the led chip, can't allow whole LED not luminous fully, therefore single micrinite failure effect degree can be that denominator calculates with total micrinite number.Therefore the micrinite number is cut apart manyly more, and single micrinite failure effect degree can be low more, the AC LED that becomes with 36 micrinite arrays and example, single micrinite failure effect degree only 2.7% and the scope that influences again most probably only for a certain half-wave at alternating current.
If the mode with high voltage designs, AC LED or high-voltage LED micrinite may be more than 100, and its each micrinite failure effect degree will reduce to 1%.Analysis estimates according to the AC LED failure properties, if discuss with present experimental data and failure criteria 30%, the AC LED of 100 micrinite, equal to have 30 micrinite to lose efficacy and just reach failure condition, this moment, light source output still was higher than original intensity, just efficient is relatively poor, and the LED life-span can be broken away from the defective effect and fully prolong.
Fig. 2 A is the micrinite number that lost efficacy in the AC LED and voltage-to-current-power ((V-I-W)) synoptic diagram of AC LED.In the 2nd figure, be the example explanation with the AC LED of a 0.06mm2 36/54pcs.Curve 21 expressions one are alternating voltage fixedly, and curve 22 is the received electric current of AC LED, and curve 23 is the power that AC LED consumed.Can be found that by Fig. 2 A to Fig. 2 F the micrinite number of inefficacy is many more, the received electric current of AC LED is high more, and this also makes the brightness of the light that AC LED sent also and then increase.Though it is relatively poor that the luminescence efficiency of AC LED can become, really the LED life-span effectively can be prolonged.Such feature also appears on the high voltage direct current LED that forms with micrinite.
Fig. 3 is illustrated under the driving of deciding voltage, AC LED micrinite failure properties rate of change figure.In Fig. 3, be the example explanation with the AC LED of 0.06mm2 36/54pcs.The existing LED inefficacy profile of curve 31 expressions.As long as because the PN of general LED connects face the generation defective is arranged, under the driving of deciding electrical voltage system, luminous flux and equivalent internal resistance can descend rapidly, and electric current can raise and burn LED formation open circuit moment.Power input when the micrinite of varying number lost efficacy in the curve 32 expression AC LEDs changes number percent.The light flux variations number percent of the AC LED the when micrinite of varying number lost efficacy in the curve 33 expression AC LEDs.The luminescence efficiency of the AC LED the when micrinite of varying number lost efficacy in the curve 34 expression AC LEDs changes number percent.By on the figure as can be known, micrinite inefficacy quantity is high more, the luminous flux that AC LED sent is many more.When the micrinite inefficacy quantity in the AC LED was 8, the power of input had increased by 159%, and the luminous flux of AC LED output has increased by 53%, and luminescence efficiency has then descended 41.5%.AC LED or high voltage direct current LED are deciding under the driven, when part micrinite inefficacy short circuit, have one section luminous flux first transition, and this phenomenon results from power input and electric current and rises, and proportional with the micrinite failure number.The inefficacy of AC LED at this moment only can reduce the luminescence efficiency of self, can't burn because of equivalent internal resistance descends rapidly as existing LED.If there is on the AC LED part micrinite to be open circuit, also might keep half-wave point amount (that is when the positive voltage of alternating voltage or negative voltage were interval, AC LED still can be luminous).
Because when AC LED that the present invention carried or high voltage direct current LED lost efficacy at the part micrinite, the luminous flux of output can increase progressively, therefore, if will keep the luminous flux of AC LED or high voltage direct current LED output fixes, in the time of then must increasing, reduce voltage or the electric current of input AC LED or high voltage direct current LED at the luminous flux of AC LED or high voltage direct current LED output.Must improve driving voltage or drive current to keep the feature of brightness of luminescence component just opposite with existing.
Fig. 4 is the calcspar according to an embodiment of the display system of light emitting diode of the present invention.LED unit 43 is made up of AC LED or high voltage direct current LED, and wherein AC LED or high voltage direct current LED all are made up of a plurality of micrinite as shown in Figure 1.Voltage source 41 sees through variable resistor 42 and couples with LED unit 43.The light flux variations that photodetector 44 is exported in order to detection LED unit 43, or 43 brightness of LED luminescence unit change.The resistance value of variable resistor 42 is adjusted in the brightness that photodetector 44 increases according to described LED luminescence unit 43, makes the electric current of input LED luminescence unit 43 reduce, to keep the fixing luminous flux of LED luminescence unit 43 outputs.Also can prolong the serviceable life of LED luminescence unit 43 like this.In the present embodiment, LED luminescence unit 43 can be single AC LED or high voltage direct current LED, or the module of being made up of a plurality of AC LEDs or high voltage direct current LED, as the car light or the traffic sign light fixture of automobile.
Fig. 5 is the calcspar according to another embodiment of the display system of light emitting diode of the present invention.LED unit 53 is made up of AC LED or high voltage direct current LED, and wherein AC LED or high voltage direct current LED all are made up of a plurality of micrinite as shown in Figure 1.Photodetector 54 is in order to detecting the luminous flux that LED unit 53 is exported, and sends detected result to controller 51.The brightness that controller 51 increases according to LED luminescence unit 53, the drive current of the described LED luminescence unit 53 of input is reduced in Control current source 52.In the present embodiment, if LED unit 53 is made up of high voltage direct current LED, then the drive current in order to driving LED unit 53 can be a pulse width modulation signal, is produced by a pulse width modulation circuit.And can control the brightness of LED luminescence unit 53 by the responsibility cycle of adjusting described pulse width modulation signal.
Fig. 6 is the calcspar according to an embodiment of the caution system of the light emitting diode with alarming device of the present invention.LED unit 61 is driven by voltage source 62.LED unit 61 is made up of the high voltage direct current LED of as shown in Figure 1 a plurality of micrinite.Light flux variations or brightness variation that pick-up unit 63 is exported in order to detect LED unit 61, and send detected result to voltage source 62, in order to adjust the driving voltage that voltage source 62 outputs to LED unit 61, the luminous flux that makes LED unit 43 be exported is kept necessarily.In another embodiment, pick-up unit 63 sends detected result to alarming device 64, and alarming device 64 is also judged the micrinite number that lost efficacy in the LED unit 61 according to detected result.When if the micrinite number that lost efficacy exceeds predetermined value, but LED unit 61 still normal operations this moment, but alarming device 64 output alarm signals, as the cresset of flicker, warning tones or taste remind the user to change.
In another embodiment, pick-up unit 63 detects the light flux variations that LED unit 61 is exported, or 61 brightness of LED luminescence unit change, and detected result is converted to the failure number of micrinite in the LED luminescence unit 61.If the failure number of micrinite is greater than a predetermined value in the LED luminescence unit 61, or the micrinite number that the lost efficacy number percent that accounts for whole micrinite numbers is during greater than certain predetermined percentage, pick-up unit 63 output control signals, make alarming device 64 output alarm signals, cresset as flicker, warning tones or taste remind the user to change.
In another embodiment, voltage source 62 is for deciding voltage source, and therefore fibrous root is not adjusted output voltage according to the testing result of pick-up unit 63.Pick-up unit 63 may be change in voltage testing circuit, electric current change detecting circuit or variable power testing circuit, and sends detected result to alarming device 64.If the failure number of micrinite is greater than a predetermined value in the LED luminescence unit 61, or the micrinite number that the lost efficacy number percent that accounts for whole micrinite numbers is during greater than certain predetermined percentage, and alarming device 64 output alarm signals are as the cresset of flicker, warning tones or taste remind the user to change.
Fig. 7 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.LED unit 71 is driven by voltage source 72.LED unit 71 can be made up of AC LED or high voltage direct current LED, and wherein AC LED or high voltage direct current LED all are made up of a plurality of micrinite as shown in Figure 1.In the present embodiment, pick-up unit is a variable power detection device 73, in order to judge the variable power of LED unit 71.In the present embodiment, LED unit 71 is high voltage direct current LED, and characteristic is example explanation with family curve shown in Figure 3, and voltage source 72 is for deciding voltage source.When the failure number of micrinite was 4, power had increased by 62%, because LED unit 71 is by the system drive of deciding voltage, so can learn that electric current has increased by 62%.Alarming device 74 comprises a current-limiting resistance 75 and display unit 76.In the present embodiment, variable power detection device 73 can be a resistance, and display unit 76 is for having the LED of 1.8V trigger voltage, and variable power detection device 73 is in parallel with alarming device 74.Suppose that under the situation that does not have micrinite to burn the electric current of the LED unit 71 of flowing through is 100mA, the resistance value of variable power detection device 73 is 12 Ω, so the voltage that variable power detection device 73 produces reduces to 1.2V, and deficiency is so that display unit 76 is luminous.When the failure number of micrinite was 4, the electric current of the LED unit 71 of flowing through was 162mA, and this moment, the voltage of variable power detection device 73 generations was reduced to 1.92V, just can make display unit 76 luminous.Profit just can be learnt in the LED unit 71 the micrinite number of inefficacy by alarming device 74 in such a way.In addition, also can in parallel or a plurality of alarming devices of connecting, and, make the micrinite number of different inefficacies that different display device is shown by circuit design, reach better alarm function.
Fig. 8 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.LED unit 81 is driven by first voltage source 82.LED unit 81 can be made up of AC LED or high voltage direct current LED, and wherein AC LED or high voltage direct current LED all are made up of a plurality of micrinite as shown in Figure 1.In the present embodiment, pick-up unit is a variable power detection device 83, and variable power detection device 83 comprises a resistance R 1, photo-coupler 85 and current-limiting resistance R2.Photo-coupler 85 comprises a LED 85a and a light-receiving module 85b, wherein when light-receiving module 85b receive the light time just can conducting.Resistance R 1 has first end and second end, and wherein said first end couples described LED unit 81, and described second end couples first voltage source 82.Current-limiting resistance R2 has first end and second end, and wherein said first end couples first end of resistance R 1.Photo-coupler 84 has first end, couples second end of described current-limiting resistance R2, and photo-coupler 84 also has second end, couples second end of described resistance R 1.Described photo-coupler couples described alarming device 84, when described photo-coupler 84 is enabled, makes that the caution light emitting diode 87 in the described alarming device 84 stops luminous.Alarming device 84 comprises second voltage source, resistance R 3 and R4, and caution light emitting diode 87.Resistance R 3 has first end, couples described second voltage source 86.Caution light emitting diode 87 has first end, couples second end of described resistance R 3, and second end, sees through resistance R 4 ground connection, and second end of wherein said caution light emitting diode 87 couples first end of described light-receiving module 85b.Voltage by the resistance value adjustment Vc that adjusts R3 and R4 makes that caution light emitting diode 87 can be luminous.In the present embodiment, the LED 85a in the photo-coupler 85 needs the 1.1V just can be luminous.
Suppose that under the situation that does not have micrinite to burn the electric current of the LED unit 81 of flowing through is 100mA, the resistance value of R1 is 7.5 Ω, so the voltage that R1 produces reduces to 0.75V, and deficiency is so that LED 85a is luminous.When the failure number of micrinite was 4, the electric current of the LED unit 81 of flowing through was 162mA, and the voltage that this moment, R1 produced is reduced to 1.21V, just can make LED 85a luminous, and light-receiving module 85b is switched on.When light-receiving module 85b conducting, voltage Vc is pulled to earth potential, makes that caution light emitting diode 87 can't be luminous, reaches alarm function.In addition, also can utilize a supervising device (not drawing on the figure), monitoring voltage Vc when voltage Vc becomes 0, represents that the inefficacy number of micrinite in the LED unit 81 this moment is 4 at any time.
Fig. 9 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.Compare with Fig. 8, difference is in the position of caution light emitting diode 87, and caution light emitting diode 87 is can be not luminous at the beginning, and during light-receiving module 85b conducting by the time, voltage Vc is pulled to earth potential, and caution light emitting diode 87 just meeting is luminous.LED unit 81 is driven by first voltage source 82.Variable power detection device 83 comprises a resistance R 1, photo-coupler 85 and current-limiting resistance R2.Photo-coupler 85 comprises a LED 85a and a light-receiving module 85b, wherein when light-receiving module 85b receive the light time just can conducting.Resistance R 1 has first end and second end, and wherein first end couples described LED unit 81, the second ends and couples first voltage source 82.Current-limiting resistance R2 has first end and second end, and wherein first end couples first end of resistance R 1.Photo-coupler 84 has first end, couples second end of described current-limiting resistance R2, and photo-coupler 84 has second end, couples second end of described resistance R 1.Described photo-coupler couples described alarming device 84, when described photo-coupler 84 is enabled, makes caution light emitting diode 87 conductings in the described alarming device 84.Alarming device 84 comprises second voltage source 86, resistance R 3 and R4, and caution light emitting diode 87.Voltage by the resistance value adjustment Vc that adjusts R3 and R4 makes that caution light emitting diode 87 is can be not luminous at the beginning.In the present embodiment, the LED85a in the photo-coupler 85 needs the 1.1V just can be luminous.
Suppose that under the situation that does not have micrinite to burn the electric current of the LED unit 81 of flowing through is 100mA, the resistance value of R1 is 7.5 Ω, so the voltage that R1 produces reduces to 0.75V, and deficiency is so that LED 85a is luminous.When the failure number of micrinite was 4, the electric current of the LED unit 81 of flowing through was 162mA, and the voltage that this moment, R1 produced is reduced to 1.21V, just can make LED 85a luminous, and light-receiving module 85b is switched on.When light-receiving module 85b conducting, voltage Vc is pulled to earth potential, makes to reach alarm function by caution light emitting diode 87 thereby luminous.In addition, also can utilize a supervising device (not drawing on the figure), monitoring voltage Vc when voltage Vc becomes 0, represents that the inefficacy number of micrinite in the LED unit 81 this moment is 4 at any time.
Figure 10 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.LED unit 101 is driven by voltage source 102.LED unit 101 can be made up of AC LED or high voltage direct current LED, wherein AC LED or high voltage direct current LED are all formed LED unit 101 by a plurality of micrinite as shown in Figure 1 and are coupled a pick-up unit, in the present embodiment, pick-up unit can be a variable power detection device, as the resistance R among the figure 1.In addition, pick-up unit also can comprise an amplifying circuit 103, in order to amplifying voltage V1, and sends the result to controller 104.In the present embodiment, can before or after amplifying circuit 103, couple an analog-digital converter (analog to digitalconverter), in order to voltage V1 is converted to a digital signal.Controller 104 can see through the family curve of the LED in the LED unit 101 by the variation of voltage V1, as shown in Figure 3, calculates the inefficacy number of the LED micrinite in the present LED unit 101.Controller 104 is again with transmission display device 105 demonstrations as a result.Controller 104 can show the inefficacy number of the LED micrinite in the LED unit 101 with literal or graphics mode transmission display device 105.
Figure 11 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.LED unit 111 is driven by voltage source 112.LED unit 111 can be made up of AC LED or high voltage direct current LED, and wherein AC LED or high voltage direct current LED all are made up of a plurality of micrinite as shown in Figure 1.LED unit 111 couples a pick-up unit, and in the present embodiment, pick-up unit can be a variable power detection device, as the resistance R among the figure 1.In addition, pick-up unit also can comprise a controller 113 and a scrambler 114, the variation of controller 113 monitoring voltage V1, and see through the family curve of the LED in the LED unit 111, as shown in Figure 3, calculate the inefficacy number of the LED micrinite in the present LED unit 111.Then, controller 113 is sent to the result after scrambler 114 encodes, and is sent to alarming device 117 again.Transmission between scrambler 114 and the alarming device 117 can see through the transmission mode of circuit, wired or wireless network, blue bud, infrared ray or the like and finish, and corresponding transmitter (transmitter) also is necessary with receiver (receiver).In the present embodiment, alarming device 117 is remote monitoring, in order to the use situation of monitoring LED unit 111.This can be applied in the monitoring of traffic sign, changes before traffic sign cresset complete failure.The data that code translator 115 receives scrambler 114 row decoding of going forward side by side sends the result after the decoding to monitoring unit 116.Monitoring unit 116 just can be learnt the inefficacy number of the LED micrinite in the LED unit 111 this moment.In another embodiment, alarming device 117 can be a remote server, and the transmission mode that sees through circuit, wired or wireless network, blue bud, infrared ray or the like receives and judge the data of scrambler 114 transmission.
Figure 12 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.In the present embodiment, light emitting diode 125 can be made up of AC LED or high voltage direct current LED, and wherein AC LED or high voltage direct current LED all are made up of a plurality of micrinite as shown in Figure 1.Light emitting diode 125 can cover brilliant substrate or crystalline substance of heap of stone is finished.Pick-up unit can be a variable power detection device, and as the resistance R among the figure 1, light emitting diode 125 can be encapsulated in the same light emitting diode 121 with resistance R 1.Alarming device 123 comprises current-limiting resistance R2 and display unit, and in the drawings, display unit is LED 124.The caution system of the light emitting diode of function mode Fig. 7 of light emitting diode 121, alarming device 123 and voltage source 122 is identical, does not give unnecessary details at this.Light emitting diode 125 has first electrode and second electrode, and wherein an end of second electrode and resistance R 1 couples, and an end of resistance R 1 then forms third electrode.Therefore light emitting diode 121 just has three electrodes, voltage source is connected with first electrode and second electrode just can make light emitting diode 125 luminous.And measure the change in voltage of second electrode and third electrode, see through again as the family curve of Fig. 3, just can learn the situation of micrinite inefficacies in the light emitting diode 125 this moment.
Figure 13 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.LED unit 131 can be made up of AC LED or high voltage direct current LED, and wherein AC LED or high voltage direct current LED all are made up of a plurality of micrinite as shown in Figure 1.Alarming device 134 comprises a current-limiting resistance 135 and display unit 136.Display unit 136 is for having the LED of 1.8V trigger voltage in the present embodiment.Pick-up unit is an inductance, and inductance 133 produces voltage drop according to the variation of electric current I.As if the trigger voltage of the voltage drop that is produced by inductance 133 greater than display unit 136, then display unit 136 just can be luminous.Present embodiment with inductance as the variable power detection device be in the AC LED if there is micrinite to lose efficacy, the application that electric current can changed features be done, inductance 133 also can be formed by an inductive coil.
Figure 14 is the calcspar according to another embodiment of the caution system of the light emitting diode with alarming device of the present invention.LED unit 141 is driven by voltage source 142.LED unit 141 can be made up of AC LED or high voltage direct current LED, and wherein AC LED or high voltage direct current LED all are made up of a plurality of micrinite as shown in Figure 1.Pick-up unit is a voltage detection device 143, by resistance R 1 connect with R2 form.Alarming device 144 has first light emitting diode 145 and second light emitting diode 146, and wherein first light emitting diode 145 couples end points N1 and N3, and second light emitting diode 146 couples end points N2 and N3.When the voltage difference of end points N1 and N3 during greater than the trigger voltage of first light emitting diode 145, first light emitting diode 145 is luminous.When the voltage difference of end points N2 and N3 during greater than the trigger voltage of second light emitting diode 146, second light emitting diode 146 is luminous.Profit just can be lighted different light emitting diodes according to the failure number of different micrinite in such a way.When if the trigger voltage of first light emitting diode 145 and second light emitting diode 146 is identical, first light emitting diode 145 is understood Zao more luminous than second light emitting diode 146.In another embodiment, first light emitting diode 145 has different colors and wavelength with second light emitting diode 146.
Though the present invention discloses as above with specific embodiment; so it is only in order to be easy to illustrate the present invention's technology contents; and be not with narrow sense of the present invention be defined in described embodiment; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion with the qualification of claims.
Claims (28)
1. the caution system of a light emitting diode comprises:
Luminescence unit is made up of a plurality of micrinite;
Pick-up unit, in order to detecting described luminescence unit, and the output testing result; And
Alarming device shows the damaged condition of the micrinite in the described luminescence unit according to described testing result.
2. the caution system of light emitting diode as claimed in claim 1, wherein said pick-up unit is a resistance, in order to producing voltage drop, when this voltage drop during greater than predetermined value, drives described alarming device.
3. the caution system of light emitting diode as claimed in claim 1, wherein said pick-up unit is an inductance, produces voltage drop according to the electric current of the described luminescence unit of flowing through, and when this voltage drop during greater than predetermined value, drives described alarming device.
4. the caution system of light emitting diode as claimed in claim 3, wherein said inductance comprises inductive coil.
5. the caution system of light emitting diode as claimed in claim 1, wherein said pick-up unit comprises at least one resistance, electric capacity or inductance, in order to voltage, electric current or the variable power that detects described light emitting diode.
6. the caution system of light emitting diode as claimed in claim 5, wherein said pick-up unit also comprises amplifying circuit, in order to detected testing result is amplified, is sent to described alarming device.
7. the caution system of light emitting diode as claimed in claim 5, wherein said pick-up unit also comprises coding circuit, in order to sending described alarming device to behind the detected testing result coding of described pick-up unit.
8. the caution system of light emitting diode as claimed in claim 1, wherein said alarming device comprises decoding scheme, in order to decipher the data that described pick-up unit sends.
9. the caution system of light emitting diode as claimed in claim 1, wherein said alarming device comprises display device, light emitting diode, flexible piezoelectric sound-generating devices or computing machine.
10. the caution system of light emitting diode as claimed in claim 1, wherein said alarming device is in order to produce a taste.
11. the caution system of light emitting diode as claimed in claim 1, wherein said alarming device are remote server, link up in order to see through circuit, cable network, wireless network, blue bud or infrared ray and described pick-up unit.
12. the caution system of light emitting diode as claimed in claim 1, wherein said alarming device comprises first display device and second display device, when the infringement of the micrinite in described luminescence unit quantity reaches first predetermined value, drive described first display device; When the infringement of the micrinite in described luminescence unit quantity reaches second predetermined value, drive described second display device.
13. the caution system of light emitting diode as claimed in claim 1, wherein said first display device is first light emitting diode, and described second display device is second light emitting diode.
14. the caution system of light emitting diode as claimed in claim 13, wherein said first light emitting diode has different wavelength with described second light emitting diode.
15. the caution system of light emitting diode as claimed in claim 1, wherein said luminescence unit comprises light emitting diode, and this light emitting diode is alternating-current light emitting diode or high voltage direct current light emitting diode.
16. the caution system of light emitting diode as claimed in claim 1, wherein said luminescence unit is made up of a plurality of alternating-current light emitting diode or high voltage direct current light emitting diodes with micrinite structure.
17. the caution system of light emitting diode as claimed in claim 1, wherein said light emitting diode and pick-up unit are encapsulated in the same cellular construction.
18. the caution system of light emitting diode as claimed in claim 17, wherein said light emitting diode also couples a resistance, described light emitting diode has first end and second end, described resistance has first end and second end, first end of described light emitting diode forms first electrode, first end of described light emitting diode and first end of described resistance form second electrode, and second end of described resistance forms third electrode.
19. the caution system of light emitting diode as claimed in claim 1 also comprises controller, the micrinite of trying to achieve and writing down in the described luminescence unit according to described testing result damages quantity.
20. the caution system of light emitting diode as claimed in claim 19, wherein said controller according to testing result adjustment import the drive current or the driving voltage of described light emitting diode.
21. the caution system of light emitting diode as claimed in claim 19 also comprises:
Current source, output driving current is described light emitting diode extremely, and is controlled by the size that described controller is adjusted described drive current.
22. the caution system of light emitting diode as claimed in claim 20, wherein said current source comprises current mirroring circuit.
23. the caution system of light emitting diode as claimed in claim 20, wherein said drive current is the pulse width modulation signal, described current source is the pulse width modulation circuit, described pulse width modulation circuit is controlled by described controller, in order to adjust the responsibility cycle of described pulse width modulation signal.
24. the caution system of light emitting diode as claimed in claim 19 also comprises:
Voltage source, outputting drive voltage is described light emitting diode extremely, and is controlled by the size that described controller is adjusted described driving voltage.
25. the caution system of light emitting diode as claimed in claim 19, wherein pick-up unit is an optical detecting unit, in order to detecting the brightness of described light emitting diode, and a testing result is sent to described controller.
26. the caution system of light emitting diode as claimed in claim 19, when the brightness of described light emitting diode increased, described controller reduced the drive current of the described light emitting diode of input.
27. the caution system of light emitting diode as claimed in claim 1, wherein said pick-up unit is the variable power detection device, comprise photo-coupler, couple described alarming device, when the electric current of the described luminescence unit of flowing through increases predetermined value, when described photo-coupler is enabled, make the caution light emitting diode conducting of one in the described alarming device or close.
28. the caution system of light emitting diode as claimed in claim 27, wherein said photo-coupler comprises:
Luminescence component; And
Light-receiving module couples described alarming device, and when the magnitude of current of the described luminescence unit of flowing through increased described predetermined value, described luminescence component was switched on and is luminous, makes described light-receiving module be switched on.
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| CN 200810098718 CN101592702B (en) | 2008-05-30 | 2008-05-30 | Alarm system and method of light emitting diodes |
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| CN 200810098718 CN101592702B (en) | 2008-05-30 | 2008-05-30 | Alarm system and method of light emitting diodes |
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| CN101592702B CN101592702B (en) | 2013-06-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305904A (en) * | 2011-08-18 | 2012-01-04 | 上海华碧检测技术有限公司 | Opto-coupler failure analysis method |
| CN105067986A (en) * | 2015-08-03 | 2015-11-18 | 江苏达伦电子股份有限公司 | Aging self-detection device used for LED lamp |
| CN111624454A (en) * | 2019-02-11 | 2020-09-04 | 中国科学院半导体研究所 | Test board and test method for LED packaging tube |
| CN112904168A (en) * | 2021-01-13 | 2021-06-04 | 深圳市灿升实业发展有限公司 | Semiconductor breakdown voltage detection device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100470749C (en) * | 2005-10-24 | 2009-03-18 | 南茂科技股份有限公司 | Crystal wafer testing method and structure of LED |
| CN100582802C (en) * | 2007-08-03 | 2010-01-20 | 重庆大学 | LED chip/ wafer non-contact type check-up method |
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2008
- 2008-05-30 CN CN 200810098718 patent/CN101592702B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305904A (en) * | 2011-08-18 | 2012-01-04 | 上海华碧检测技术有限公司 | Opto-coupler failure analysis method |
| CN105067986A (en) * | 2015-08-03 | 2015-11-18 | 江苏达伦电子股份有限公司 | Aging self-detection device used for LED lamp |
| CN111624454A (en) * | 2019-02-11 | 2020-09-04 | 中国科学院半导体研究所 | Test board and test method for LED packaging tube |
| CN112904168A (en) * | 2021-01-13 | 2021-06-04 | 深圳市灿升实业发展有限公司 | Semiconductor breakdown voltage detection device |
| CN112904168B (en) * | 2021-01-13 | 2021-10-29 | 深圳市灿升实业发展有限公司 | Semiconductor breakdown voltage detection device |
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| Publication number | Publication date |
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| CN101592702B (en) | 2013-06-26 |
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