CN101945513A - Light-emitting diode device with compensating mechanism - Google Patents
Light-emitting diode device with compensating mechanism Download PDFInfo
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- CN101945513A CN101945513A CN2009101401751A CN200910140175A CN101945513A CN 101945513 A CN101945513 A CN 101945513A CN 2009101401751 A CN2009101401751 A CN 2009101401751A CN 200910140175 A CN200910140175 A CN 200910140175A CN 101945513 A CN101945513 A CN 101945513A
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- light
- emitting diode
- emitting diodes
- diode assembly
- state detection
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Abstract
The invention discloses a light-emitting diode (LED) device. The LED device comprises a plurality of LEDs, a state detecting unit, a power supply control unit and a processor unit, wherein when more than one LEDs are out of order, the other LEDs can operate normally; the state detecting unit is coupled with the LEDs; the power supply control unit provides a power source and outputs the power source to the LEDs; and the processor unit instructs the power supply control unit to adjust the power source and output the power source to the LEDs according to the state signal provided by the state detecting unit. By using the light-emitting diode device with the compensating mechanism, the power can be rated.
Description
Technical field
The present invention relates to a kind of light-emitting diode assembly, particularly a kind of light-emitting diode assembly with compensation mechanism.
Background technology
Light-emitting diode (Light Emitting Diode is called for short LED) was born in generation nineteen sixty, and from red-light LED, green light LED, the one tunnel developed blue-ray LED, just really saw the commercialization with LED up to 1998.LED has functions such as power saving, switching speed are fast, and LED widely applies in deixis at present, and this field also is the market that LED enters at first, as outdoor display panel, traffic signal light and flat illumination etc.Along with the high-order mobile phone adopts LED behind backlight, LED has opened new application again.
The range of application of LED is quite wide, and by early stage mobile phone, midget plant such as remote controller etc., because of high-brightness LED occurs, range of application then is extended to products such as automobile, illumination, outdoor large display in recent years.In addition because advantage such as LED is applied to display light source and backlight has high color saturation, start fast, no mercury and life-span are grown, so display be LED next step have the development potentiality product.
Recently, LED is applied in the display scope also more and more wider, expand to the LCD screen of projection TV or even LCD TV and computer etc. gradually by the outdoor large display, increasing and strengthen day by day along with the size of these products for the requirement of picture light source quality, so also increase thereupon for the reliability requirement of LED.If there is LED to damage at present in the led array, do not have any compensation mechanism, not only can cause LED illumination to produce inhomogeneity problem, the while also has too much voltage on the line and also can cause the problem that part is overheated and then cause life of product to shorten.
Therefore, need a kind of meliorative LED matrix, can afford redress mechanism and solve above problem.
Summary of the invention
In view of this, purpose of the present invention is providing a kind of light-emitting diode assembly exactly, if there is a LEDs to take place that voltage when unusual floats or electric current is unstable, the illuminance that is produced changes problem overheated with part and then that cause life of product to shorten to solve known skill.
According to purpose of the present invention, a kind of light-emitting diode assembly is proposed, comprise a plurality of light-emitting diodes, when these a plurality of light-emitting diodes take place more than one when unusual, but still normal operation; State detection unit couples with these a plurality of light-emitting diodes; Power control unit provides power supply to export this a plurality of light-emitting diodes to; And processor unit, according to the status signal that state detection unit provided, indicate this power control unit to adjust this power supply and export this a plurality of light-emitting diodes to.
According to embodiments of the invention, at each LED protection component of all having arranged in pairs or groups of a plurality of light-emitting diodes.
According to embodiments of the invention, wherein this state detection unit comprises voltage detector and current detector.And according to another embodiment of the present invention, wherein this state detection unit also comprises luminance sensor.
According to some embodiment of the present invention, wherein this processor unit can take place when unusual at these a plurality of light-emitting diodes, according to the status signal that state detection unit provided, after indicating this power control unit to reduce total input voltage of these a plurality of light-emitting diodes, the electric current that increases indivedual light-emitting diodes again is with compensate for brightness.
According to another object of the present invention, a kind of light-emitting diode assembly is proposed, comprise a plurality of light-emitting diodes, when these a plurality of light-emitting diodes take place more than one when unusual, but still normal operation; State detection unit couples with these a plurality of light-emitting diodes; Power control unit provides power supply to export this a plurality of light-emitting diodes to; And processor unit, according to the status signal that state detection unit provided, indicate this power control unit to adjust this power supply and export this a plurality of light-emitting diodes to;
Wherein these a plurality of light-emitting diodes are divided into first and second portion, and this first and second portion have power control signal and state detection signal separately respectively.
According to embodiments of the invention, wherein this first is the odd number part of these a plurality of light-emitting diodes, and this second portion is the even number part of these a plurality of light-emitting diodes.
Feature described herein and combination thereof as long as its combination is not incompatible, all can be understood by those skilled in the art among specification literal and the embodiment within the scope of the present invention.In addition, except technical characterictic and combination thereof that any embodiment clearly gets rid of, also be included in category of the present invention.When the preferred embodiment under structure of the present invention and method have been specified in by reference and illustration disclose.Need be appreciated that, described a plurality of embodiment and illustration only be exemplary usefulness but not in order to the restriction the present invention.The present invention is defined by claim.These and other objects, feature and embodiment can be described in the chapters and sections of following execution mode in conjunction with the accompanying drawings.
Description of drawings
The present invention is defined by claim.These and other objects, feature and embodiment can be described in the chapters and sections of following execution mode in conjunction with the accompanying drawings, wherein:
Fig. 1 is the calcspar according to the light-emitting diode assembly with compensation mechanism of the embodiment of the invention.
Fig. 2 illustrates operation principle schematic diagram of the present invention for only going here and there with a row LED according to the embodiment of the invention.
Fig. 3 and Fig. 4 are for having the schematic layout pattern of the light-emitting diode assembly of compensation mechanism according to different embodiments of the invention.
Fig. 5 is for another alternate embodiment has the schematic layout pattern of the light-emitting diode assembly of compensation mechanism according to the present invention.
Fig. 6 is for another kind of alternate embodiment has the system configuration schematic diagram of the light-emitting diode assembly of compensation mechanism according to the present invention.
Embodiment
For further specifying each embodiment, the present invention provides accompanying drawing.These a little accompanying drawings are the part for disclosure of the present invention, and it is mainly in order to explanation embodiment, and can cooperate the associated description of specification to explain the operation principles of embodiment.Cooperation is with reference to these contents, and those skilled in the art will be understood that execution mode and the advantage of the present invention that other are possible.Element among the figure and not drawn on scale, and the similar elements symbol is commonly used to represent similar elements.
Hereinafter with reference to relevant drawings, illustrate according to the embodiment with light-emitting diode assembly of compensation mechanism of the present invention.
See also Fig. 1, it is the calcspar according to the light-emitting diode assembly with compensation mechanism of the embodiment of the invention.Among the figure, this device comprises light emitting diode matrix 100, and the light-emitting diode of many series connection is wherein arranged, and in this example, is arranged to 1,2 ... m row, each row all have separately power supply (power supply 1, power supply 2 ... power supply m) and be connected to power control unit 110.In addition, each LED, as 113, LED protection component all in parallel as 115, can take place when unusual at this LED, and the LED that provides the redundant path to walk around this fault is in order to avoid exert an influence in the lump to remaining LED in these row.End of light-emitting diode of many series connection of this device also comprises detecting unit 125, with states such as the state of the light-emitting diode that detects several series connection such as curtages, and detected state is delivered to processor unit 120 handle.In addition, this detecting unit 125 can comprise that also luminance sensor 130 is to detect the brightness of light-emitting diode on whole light emitting diode matrix 100 or some position.Certainly, also power control unit 110 and processor unit 120 can be combined and become independent power supply control and processing unit.
The invention is characterized in to solve in the known skill that the illuminance that is produced changes problem overheated with part and then that cause life of product to shorten if there is a LEDs to take place that voltage when unusual floats or electric current is unstable.
If there is the LED of (or more than) to take place when unusual; the present invention utilizes the LED protection component to guarantee the normal operation of other LED; and utilize the feedback signal of voltage detecting circuit in the detecting unit or current detection circuit output; as voltage detecting 1 or current detecting 1; to processor unit; calculate and the voltage of judgement LED or the variable quantity of electric current; and then the output of corresponding adjustment power control unit; the illuminance loss cause because of LED damages with compensation, and reach the heat energy that the LED voltage difference that prevents to damage produces and marry again on other parts.
In an embodiment, the voltage detecting circuit in the detecting unit 125 of the present invention detects the voltage summation of institute's conducting in each LED row, and it is delivered to processor unit 120.Current detection circuit detects the electric current of institute's conducting in each LED row, and it is delivered to processor unit 120.And also can comprise pwm control signal in the detecting unit 125 of the present invention, it can receive the signal of from processor unit 120, by pwm control signal wherein MOSFET 117 is adjusted, and then can control the brightness of each LED row.
In an embodiment, the feedback signal that processor unit 120 of the present invention receives from voltage detecting circuit or voltage detecting circuit, as voltage detecting 1 or current detecting 1, when LED is unusual, (open circuit or short circuit), can calculate and adjust voltage control and PWM output signal according to this by testing mechanism, to reach the effect of deciding power.
In an embodiment, the present invention also comprises luminance sensor 130, can further the brightness feedback signal be delivered to processor unit 120 when luminance shortage, so that processor unit increase voltage or electric current are to reach the function of luminance compensation.
Below will explain how the light-emitting diode assembly with compensation mechanism of the present invention works by the explanation of specific embodiment.
See also Fig. 2, only go here and there and describe in the present embodiment with a row LED, comprise in these row LED string n LED (1,2 ... n), it must be understood that principle of the present invention can be spreaded among the array that is constituted to multiple row LED string easily.
As can be seen from Figure, each row LED string has following equation and operates:
Vft＝Vf1+Vf2+...+Vfn
Vt＝Vft+Vd
Vd＝Vt-Vft
Wherein, P is a LED string total consumed power
Δ Vf is that LED damages the forward bias voltage drop variable quantity that is caused
Δ Vd is the voltage detecting variable quantity
Δ P is a power loss amount
Δ I is the current compensation amount
(open circuit or short circuit) when LED is unusual, processor unit can be adjusted according to one of following mode or combination:
1. voltage adjustment:
When electric voltage exception, Vd=Vt-(Vft Δ Vf)
So Δ Vd=Δ Vf
This moment, processor unit was adjusted the total voltage output Vt of power control unit, reducing Δ Vd, married again on other parts and can reach the heat energy that the LED voltage difference that prevents to damage produces.
2. power back-off
P=Vft*I (electric current)
After voltage is adjusted, and Δ P=Δ Vd (its=Δ Vf) * I (electric current)
In order to compensate the luminance loss of Δ P, need to increase offset current Δ I
P=Vft*I=(Vft-Δ Vd) * (I+ Δ I) then
ΔI＝(ΔVd/(Vft-ΔVd))*I
Decide power output to compensate the effect of damaging the illuminance loss that causes because of LED to reach.
3. luminance sensor (not being shown among Fig. 2)
When luminance shortage, can further the brightness feedback signal be delivered to processor unit, so that processor unit increase voltage or electric current are to reach the function of luminance compensation
Only go here and there among the above embodiment and describe with a row LED, it must be understood that, principle of the present invention can be spreaded among the array that is constituted to multiple row LED string easily, the present invention's different layout type of also can arranging in pairs or groups, and further obtain better compensation effect.
See also Fig. 3 and Fig. 4, it is for having the schematic layout pattern of the light-emitting diode assembly of compensation mechanism according to different embodiments of the invention.As shown in Figure 3, it has the schematic layout pattern of the light-emitting diode assembly of compensation mechanism for the single row of the present invention LED string embodiment.Single row LED string can be divided into odd number 302 and even number 301 parts, respectively it is connected with detecting unit (detecting unit 1 as shown in FIG. and detecting unit 2) with different power control line (power supply 1 as shown in FIG. and power supply 2), LED combination and PCB layout mode by this arrangement framework, can solve individual layer PCB layout restriction simultaneously and take into account block luminance compensation notion, greatly reduce because of the same too many LED of series connection that lists and cause white balance compensation to be difficult for and problem such as waste electric power.Similarly, as shown in Figure 4, it has the schematic layout pattern of the light-emitting diode assembly of compensation mechanism for led array embodiment of the present invention.Similarly, led array can be divided into first 401 and second portion 402, respectively it be connected with detecting unit with different power control line.Certainly, array being divided into more parts also is to belong to category of the present invention to carry out trickleer control.
When wherein arbitrary (or more than) LED had unusual condition to take place, processor unit promptly can start as above-mentioned compensation mechanism repairing its luminance loss, and then keeps the required illuminance and the uniformity.
Consult Fig. 5, it is for another alternate embodiment has the schematic layout pattern of the light-emitting diode assembly of compensation mechanism according to the present invention.In the example as shown in Figure 5, (A is arranged to E row and 1 to 5 row) in this 5x5LED array, each LED itself all has independent power supply supply, detecting unit and protection component.In this illustration, if when the LED 501 of C3 position has unusual condition to take place, then can use previous described mode, the LED 505 around it is compensated improve electric current and brightness, to keep illuminance required in the integral LED array.
Consult Fig. 6, it is for another kind of alternate embodiment has the system configuration schematic diagram of the light-emitting diode assembly of compensation mechanism according to the present invention.Then use the components identical label with Fig. 1 components identical.Comprise led light source 601, normal LED irradiate light district 603, image capturing zone 605 and image acquisition system 607 in this system.According to embodiments of the invention, this led light source is that array way is arranged, come the brightness of sensing system whether normal by image acquisition system 607, if when unusual, then according to the described mode of Fig. 1, the processor unit (not shown) can be made luminance compensation immediately, and dynamically compensates by the power control unit (not shown).In addition, the position of the image capture unit in the diagram only is the usefulness of signal, as long as the position of fechtable led light source image all can be put.
Though the present invention is described with reference to embodiment, right the present invention is not subject to its detailed description.Substitute mode and revise pattern and in previous description, advise, and other substitute modes and modification pattern will by those skilled in the art thought and.Particularly, all have be same as in fact member of the present invention in conjunction with and reach the identical result person in fact with the present invention, neither disengaging spiritual category of the present invention.Therefore, all these substitute modes and revise pattern and be intended to drop on the present invention among claims and category that equipollent defined thereof.
Claims (19)
1. light-emitting diode assembly comprises:
A plurality of light-emitting diodes, when described a plurality of light-emitting diodes take place more than one when unusual, but still normal operation;
State detection unit couples with described a plurality of light-emitting diodes;
Power control unit provides power supply to export described a plurality of light-emitting diode to; And
Processor unit according to the status signal that described state detection unit provided, is indicated described power control unit to adjust described power supply and is exported described a plurality of light-emitting diode to.
2. light-emitting diode assembly as claimed in claim 1, wherein, described power control unit and described processor unit also can combine.
3. light-emitting diode assembly as claimed in claim 1, wherein, described a plurality of light-emitting diodes are the unit with many light-emitting diodes that are cascaded.
4. light-emitting diode assembly as claimed in claim 1, wherein, described state detection unit comprises voltage detector and current detector.
5. light-emitting diode assembly as claimed in claim 4, wherein, described state detection unit also comprises from described processor unit transmission PWM output signal to control the brightness of described a plurality of light-emitting diodes.
6. light-emitting diode assembly as claimed in claim 4, wherein, described state detection unit also comprises luminance sensor.
7. light-emitting diode assembly as claimed in claim 1, wherein, described processor unit can take place at least one light-emitting diode of described a plurality of light-emitting diodes when unusual, according to the status signal that described state detection unit provided, after indicating described power control unit to reduce total input voltage of described a plurality of light-emitting diodes, the electric current that increases indivedual light-emitting diodes again is with compensate for brightness.
8. light-emitting diode assembly as claimed in claim 1, wherein, each of described a plurality of light-emitting diodes LED protection component of all having arranged in pairs or groups.
9. light-emitting diode assembly comprises:
A plurality of light-emitting diodes, when described a plurality of light-emitting diodes take place more than one when unusual, but still normal operation;
State detection unit couples with each of described a plurality of light-emitting diodes;
Power control unit provides power supply to export described a plurality of light-emitting diode to; And
Processor unit according to the status signal that described state detection unit provided, is indicated described power control unit to adjust described power supply and is exported described a plurality of light-emitting diode to;
Wherein, described a plurality of light-emitting diodes are divided into first and second portion, and described first and second portion have power control signal and state detection signal separately respectively.
10. light-emitting diode assembly as claimed in claim 9, wherein, described first is the odd number part of each row in a plurality of light-emitting diodes, and described second portion is the even number part of each row in described a plurality of light-emitting diode.
11. light-emitting diode assembly as claimed in claim 9, wherein, described state detection unit comprises voltage detector and current detector.
12. light-emitting diode assembly as claimed in claim 11, wherein, described state detection unit also comprises from described processor unit transmission PWM output signal to control the brightness of described a plurality of light-emitting diodes.
13. light-emitting diode assembly as claimed in claim 11, wherein, described state detection unit also comprises luminance sensor.
14. light-emitting diode assembly as claimed in claim 9, wherein, described processor unit can take place at least one light-emitting diode of described a plurality of light-emitting diodes when unusual, according to the status signal that described state detection unit provided, after indicating described power control unit to reduce total input voltage of the described first of described a plurality of light-emitting diodes and described second portion respectively, the electric current that increases indivedual light-emitting diodes again is with compensate for brightness.
15. light-emitting diode assembly as claimed in claim 9, wherein, each of described a plurality of light-emitting diodes LED protection component of all having arranged in pairs or groups.
16. light-emitting diode assembly as claimed in claim 9, wherein, described power control unit and described processor unit also can combine.
17. light-emitting diode assembly as claimed in claim 9, wherein, described a plurality of light-emitting diodes are the unit with many light-emitting diodes that are cascaded.
18. a light-emitting diode system comprises:
Light emitting diode matrix, when one of them or above light-emitting diode take place when unusual, but still normal operation;
Image acquisition system detects the brightness of described light emitting diode matrix;
Power control unit provides power supply to export described light emitting diode matrix to; And
Processor unit according to the signal that described image acquisition system provided, is indicated described power control unit to adjust described power supply and is exported described light emitting diode matrix to.
19. light-emitting diode system as claimed in claim 18, wherein, described power control unit and described processor unit also can combine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101401751A CN101945513A (en) | 2009-07-08 | 2009-07-08 | Light-emitting diode device with compensating mechanism |
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| CN2009101401751A CN101945513A (en) | 2009-07-08 | 2009-07-08 | Light-emitting diode device with compensating mechanism |
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| CN101945513A true CN101945513A (en) | 2011-01-12 |
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| CN2009101401751A Pending CN101945513A (en) | 2009-07-08 | 2009-07-08 | Light-emitting diode device with compensating mechanism |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103634976A (en) * | 2012-08-29 | 2014-03-12 | 深圳富泰宏精密工业有限公司 | Backlight module control circuit |
| CN104349544A (en) * | 2013-07-23 | 2015-02-11 | 松下电器产业株式会社 | LED driving apparatus and illuminating device |
| CN110189689A (en) * | 2019-06-20 | 2019-08-30 | 深圳市艾希亿智能科技有限公司 | LED display control circuit |
| DE102019101710A1 (en) | 2019-01-24 | 2020-07-30 | HELLA GmbH & Co. KGaA | Method for operating a lighting device for a motor vehicle and lighting device for a motor vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2741314Y (en) * | 2004-01-16 | 2005-11-16 | 陈宜海 | Brightness stablized mineral light |
| CN101253813A (en) * | 2005-08-26 | 2008-08-27 | 飞利浦拉米尔德斯照明设备有限责任公司 | LED light source for backlighting with integrated electronics |
-
2009
- 2009-07-08 CN CN2009101401751A patent/CN101945513A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2741314Y (en) * | 2004-01-16 | 2005-11-16 | 陈宜海 | Brightness stablized mineral light |
| CN101253813A (en) * | 2005-08-26 | 2008-08-27 | 飞利浦拉米尔德斯照明设备有限责任公司 | LED light source for backlighting with integrated electronics |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103634976A (en) * | 2012-08-29 | 2014-03-12 | 深圳富泰宏精密工业有限公司 | Backlight module control circuit |
| CN104349544A (en) * | 2013-07-23 | 2015-02-11 | 松下电器产业株式会社 | LED driving apparatus and illuminating device |
| DE102019101710A1 (en) | 2019-01-24 | 2020-07-30 | HELLA GmbH & Co. KGaA | Method for operating a lighting device for a motor vehicle and lighting device for a motor vehicle |
| CN111469755A (en) * | 2019-01-24 | 2020-07-31 | 黑拉有限责任两合公司 | Method for operating a lighting device for a motor vehicle and lighting device |
| US11408578B2 (en) | 2019-01-24 | 2022-08-09 | HELLA GmbH & Co. KGaA | Method of operating an illuminating device for a vehicle and an illuminating device for a vehicle |
| CN111469755B (en) * | 2019-01-24 | 2023-08-15 | 黑拉有限责任两合公司 | Method for operating a lighting device for a motor vehicle and lighting device |
| CN110189689A (en) * | 2019-06-20 | 2019-08-30 | 深圳市艾希亿智能科技有限公司 | LED display control circuit |
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Application publication date: 20110112 |