CN103974492B - Light-emitting device and control method thereof - Google Patents
Light-emitting device and control method thereof Download PDFInfo
- Publication number
- CN103974492B CN103974492B CN201310039108.7A CN201310039108A CN103974492B CN 103974492 B CN103974492 B CN 103974492B CN 201310039108 A CN201310039108 A CN 201310039108A CN 103974492 B CN103974492 B CN 103974492B
- Authority
- CN
- China
- Prior art keywords
- luminescence unit
- string
- short circuit
- light
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of light-emitting device and control method thereof, comprise: the light emitting module running making light-emitting device, wherein light emitting module comprises multiple luminescence unit string, and each luminescence unit string comprises the multiple luminescence units be in series, and wherein one end of each luminescence unit string receives direct voltage jointly; Capture multiple current control unit and divide other cross-pressure value, judge further the luminescence unit whether fault of each luminescence unit string, wherein each current control unit and luminescence unit string to connect at least wherein; And when the luminescence unit of the specific string of luminescence unit string breaks down and number of defects x is more than or equal to critical fault number p, make the luminescence unit short circuit of fault in specific string and make (x-p+1) individual luminescence unit short circuit in each luminescence unit string outside specific string, to downgrade the direct voltage that each luminescence unit receives.
Description
Technical field
This disclosure relates to a kind of light emitting module control technology, and relates to a kind of light-emitting device and method especially.
Background technology
No matter be the backlight of display floater or in order to do the light source thrown light on, solid-state light emitting element is as light-emitting diode (lightemittingdiode; LED) mainstream technology is become gradually.In the backlight of such as display floater, light-emitting component is typically designed to the form of module, and to provide display floater uniform light source, wherein above-mentioned module comprises the light-emitting component of series connection.But, in above-mentioned module, the situation that light-emitting component breaks down can be run into unavoidably.When the light-emitting component of connecting wherein one break down situation time, the original pressure drop of the light-emitting component of this fault will be transferred on other elements with string.Therefore, when the number of fault increases, the pressure drop of transfer raises, and easily will cause damage to other elements.
For avoiding above-mentioned condition to occur, the mode in the past adopted is when the number of a string light-emitting component fault arrives a certain amount of, namely closes the light-emitting component of whole string.But, in order to the fault light-emitting component that number possibility is few, namely close the light-emitting component of whole string, will the brightness of light source be declined to a great extent, be unfavorable for its benefit operated.
Therefore, how designing a new light-emitting device and method, with when light-emitting component fault, have flexible Regulation mechanism, the shortcoming avoiding the brightness making light source to decline to a great extent, is an industry problem demanding prompt solution for this reason.
Summary of the invention
The object of the present invention is to provide a kind of light-emitting device and control method thereof, in order to solve the problem one of at least and or other problems.
Therefore, a mode of this disclosure is providing a kind of light-emitting device, comprises: light emitting module, multiple current control unit and control module.Light emitting module comprises multiple luminescence unit string, and each luminescence unit string comprises the multiple luminescence units be in series, and wherein one end of each luminescence unit string receives direct voltage jointly.Current control unit respectively with luminescence unit string to connect, to control the electric current of each luminescence unit string at least wherein.Control module captures the cross-pressure value of each current control unit, judges further the luminescence unit whether fault of each luminescence unit string; And when the luminescence unit of the specific string of luminescence unit string breaks down and number of defects x is more than or equal to critical fault number p, control module makes the luminescence unit short circuit of fault in specific string and makes (x-p+1) individual luminescence unit short circuit in each luminescence unit string outside specific string, to downgrade the direct voltage that each luminescence unit serial connection is received, reach the effect of the power consumption reducing current control unit.
According to this disclosure one embodiment, wherein the number m of luminescence unit string is less than the number n of the luminescence unit that each luminescence unit string comprises.When control module judges that number (m-1) * (x-p+1) of the luminescence unit of each luminescence unit string institute short circuit outside specific string is more than or equal to number (n-x) of the luminescence unit of non-short circuit in specific string, control module closes specific string.
According to another embodiment of this disclosure, wherein each luminescence unit more comprises light-emitting component and paralleling switch, and control module is by controlling paralleling switch conducting with light-emitting component corresponding to short circuit.
According to the another embodiment of this disclosure, wherein control module store the short circuit luminescence unit table of comparisons to record in each luminescence unit string at least one luminescence unit of short circuit and short circuit luminescence unit whether fault.Wherein control module is in time carrying out the short circuit of specific string, judges whether to carry out short circuit to the normal operation person wherein of luminescence unit in specific string, with when to normal operation person's short circuit, reverts to path to this normal operation person.According to the short circuit luminescence unit table of comparisons, control module more judges whether the luminescence unit of specific string has at least one normal luminous of short circuit unit, to make short circuit normal luminous unit revert to path when the number k of short circuit normal luminous unit is less than or equal to x, and make when k is greater than x x short circuit normal luminous unit revert to path.Wherein the luminescence unit of the specific string of control module sequentially short circuit wherein judge whether to carry out short circuit to short circuit normal luminous unit according to the cross-pressure value of current control unit in the lump.
According to this disclosure embodiment again, wherein control module is in time carrying out the short circuit of each luminescence unit string outside specific string, whether the luminescence unit of each luminescence unit string judged outside specific string according to the short circuit luminescence unit table of comparisons has short circuit luminescence unit, when luminescence unit have short circuit luminescence unit and the number q of short circuit luminescence unit be more than or equal to (x-p+1), control module does not carry out short circuit, when the number q of the luminescence unit of short circuit of luminescence unit is less than (x-p+1), the luminescence unit short circuit of individual non-short circuit that control module makes (x-p+1-q).
The embodiment had more according to this disclosure, when y luminescence unit string produces the situation of fault and fault number is z, and (during (m-1) * (x-p+1)-z)≤((n-x) * y+ (p-1) * (y-1)), control module closes y luminescence unit string.
The another way of this disclosure is providing a kind of light-emitting device control method, comprise: the light emitting module of light-emitting device is operated, wherein light emitting module comprises multiple luminescence unit string, each luminescence unit string comprises the multiple luminescence units be in series, and wherein one end of each luminescence unit string receives direct voltage jointly; Capture multiple current control unit and divide other cross-pressure value, judge further the luminescence unit whether fault of each luminescence unit string, wherein each current control unit and luminescence unit string to connect wherein; And when etc. the luminescence unit of specific string of luminescence unit string break down and number of defects x is more than or equal to critical fault number p time, make the luminescence unit short circuit of fault in specific string and make (x-p+1) individual luminescence unit short circuit in each luminescence unit string outside specific string, to downgrade the direct voltage that each luminescence unit serial connection is received.
According to this disclosure one embodiment, wherein the number of luminescence unit string is less than the number of the luminescence unit that each luminescence unit string comprises.Light-emitting device control method more comprises when number (m-1) * (x-p+1) of the luminescence unit judging each luminescence unit string institute short circuit outside specific string is more than or equal to number (n-x) of the luminescence unit of non-short circuit in specific string, directly closes this specific string.
According to another embodiment of this disclosure, wherein in the step of short circuit of carrying out specific string, more comprise and judge whether to carry out short circuit to the normal operation person wherein of luminescence unit in specific string, with when to normal operation person's short circuit, recover this normal operation person for path.Light-emitting device control method more comprises the luminescence unit judging specific string and whether has at least one normal luminous of short circuit unit, to make short circuit normal luminous unit revert to path when the number k of short circuit normal luminous unit is less than or equal to x, and make when k is greater than x x short circuit normal luminous unit revert to path.
According to the another embodiment of this disclosure, wherein in the step of short circuit of carrying out specific string, the luminescence unit more comprising the specific string of sequentially short circuit wherein judge whether to carry out short circuit to short circuit normal luminous unit according to the cross-pressure value of current control unit in the lump.
According to this disclosure embodiment again, wherein in the step of short circuit of carrying out each luminescence unit string outside specific string, whether the luminescence unit more comprising each luminescence unit string judged outside specific string has short circuit luminescence unit, when the number q of short circuit luminescence unit is more than or equal to (x-p+1), do not carry out short circuit, when the number q of short circuit luminescence unit is less than (x-p+1), make this luminescence unit short circuit of (x-p+1-q) individual non-short circuit.
The embodiment had more according to this disclosure, light-emitting device control method more comprises the situation when y luminescence unit string generation fault, a fault number in each y luminescence unit string is z, and (during (m-1) * (x-p+1)-z)≤((n-x) * y+ (p-1) * (y-1)), close y luminescence unit string.
The advantage applying this disclosure is by making the luminescence unit short circuit of fault in specific string and making (x-p+1) individual luminescence unit short circuit in each luminescence unit string outside specific string, the shortcoming causing brightness to decline to a great extent when directly closing whole luminescence unit string can be avoided, and reach above-mentioned object easily.
Accompanying drawing explanation
For the above and other object of this disclosure, feature, advantage and embodiment can be become apparent, being described as follows of institute's accompanying drawings:
Figure 1A is in this disclosure one embodiment, a kind of circuit diagram of light-emitting device;
Figure 1B is in this disclosure one embodiment, the more detailed circuit diagram of light-emitting device;
Fig. 2 is in this disclosure one embodiment, and the luminescence unit string of light emitting module produces the circuit diagram of failure situations;
Fig. 3 is in this disclosure one embodiment, the circuit diagram of two luminescence unit string generation failure situations in light emitting module; And
Fig. 4 is in this disclosure one embodiment, a kind of flow chart of light-emitting device control method.
Wherein, description of reference numerals is as follows:
1: light-emitting device 10: light emitting module
100: luminescence unit 102: light-emitting component
104: paralleling switch 12: control module
14: brightness adjustment control bus 140: current control unit
16: power module 200: fault luminescence unit
210: short circuit luminescence unit 400: light-emitting device control method
401-408: step
Embodiment
Please refer to Figure 1A.Figure 1A is in this disclosure one embodiment, a kind of circuit diagram of light-emitting device 1.Light-emitting device 1 comprises: light emitting module 10, control module 12 and brightness adjustment control bus 14.
Light emitting module 10 comprises multiple string luminescence unit, in Figure 1A be with the 1st string, the 2nd string ..., m string list shows.Each luminescence unit string comprises the multiple luminescence units 100 be in series.
In the present embodiment, light emitting module 10 comprises m luminescence unit string altogether, has n luminescence unit 100 in each luminescence unit string, to be arranged as the array format of the capable n row of m.Luminescence unit string according to galvanoluminescence, and can produce uniform light source.In the present embodiment, the number m of luminescence unit string is less than the number n of the luminescence unit 100 that each luminescence unit string comprises.Brightness adjustment control bus 14 in order to control the electric current of each luminescence unit string, can reach stable to make the luminescence of luminescence unit string.In the present embodiment, light-emitting device 1 more comprises power module 16, makes light emitting module 10 carry out luminescence to provide in power supply to light emitting module 10.Wherein, one end of each luminescence unit string in light emitting module 10 is connected to power module 16 jointly.
Please refer to Figure 1B.Figure 1B is in this disclosure one embodiment, the more detailed circuit diagram of light-emitting device 1.In the present embodiment, brightness adjustment control bus 14 comprises several current control unit 140.Each current control unit 140 is connected with the luminescence unit 100 in corresponding luminescence unit string, with the electric current of control flow check through luminescence unit string.In the present embodiment, current control unit 140 can control the electric current of luminescence unit string in a definite value, can reach stable to make the luminescence of luminescence unit string.
Luminescence unit string wherein one end receives direct voltage Vdc jointly, and the other end is connected to earth terminal GND by current control unit 140.Wherein, direct voltage Vdc can be provided by the power module 16 of Figure 1A.Each luminescence unit 100 in luminescence unit string comprises light-emitting component 102 and paralleling switch 104.Light-emitting component 102 can be solid-state (solidstate) light-emitting component.For example, semiconductor light-emitting-diode (lightemittingdiode; And Organic Light Emitting Diode (organicLED LED); OLED) solid-state light emitting element is.In different embodiment, light-emitting component 102 can adopt different solid-state light emitting elements to realize.Paralleling switch 104 is in parallel with light-emitting component 102.When paralleling switch 104 is closed and light-emitting component 102 non-fault time, light-emitting component 102 can normal operation; And when paralleling switch 104 conducting, light-emitting component 102 is positioned at normal or the state of fault all will be shorted.
In an embodiment, control module 12 controls opening and closedown of paralleling switch 104 by brightness adjustment control bus 14.In other embodiments, also can be controlled paralleling switch 104 by other mode.
Luminescence unit 100 and current control unit 140 are according to the corresponding electric current running of direct voltage Vdc, and therefore when light emitting module 10 operates, luminescence unit 100 and current control unit 140 all produce pressure drop.In Figure 1B, the pressure drop that each luminescence unit 100 produces represents with Vy (a, b), and wherein a and b represents the position that this luminescence unit 100 is arranged in light emitting module 10 array.For example, the pressure drop that the luminescence unit 100 being positioned at the 1st row the 1st row (i.e. the 1st string the 1st) produces is Vy (1,1), and the pressure drop that the luminescence unit 100 being positioned at capable n-th row of m produces is Vy (m, n).On the other hand, the pressure drop that the 1st luminescence unit string produces to the current control unit 140 that m luminescence unit string is corresponding then represents with Vz1 ~ Vzm respectively.
Control module 12 captures the cross-pressure value of the current control unit 140 of corresponding each luminescence unit string, judges further the luminescence unit 100 whether fault of each luminescence unit string.It is noted that refer to that in fact its light-emitting component 102 produces the situation that cannot operate in the fault of this luminescence unit 100.Because each luminescence unit string operates according to same direct voltage Vdc, therefore the overall presure drop of each luminescence unit string is equal.When luminescence unit 100 fault of in luminescence unit string, due to cannot normal operation again, its pressure drop originally produced will be transferred on corresponding current control unit 140.Therefore, by capturing the cross-pressure value (i.e. the pressure drop of current control unit 140) of current control unit 140 and judging whether this cross-pressure value raises, control module 12 can judge whether have luminescence unit 100 to produce the situation of fault.
For example, when luminescence unit 100 fault that the 1st row the 2nd arranges, the cross-pressure value of the current control unit 140 of its correspondence will become Vz1+Vy (1,2).If when the number x with a string middle luminescence unit 100 fault is more than or equal to a critical fault number p, damages making corresponding current control unit 140 cannot bear too high voltage, and then the luminescence unit string of whole string cannot be operated again.In an embodiment, critical fault number p is 2; This means, when the number with a string middle luminescence unit 100 fault is more than or equal to 2, corresponding current control unit 140 will be made to damage.
But, the number x of fault closes the luminescence unit 100 of whole string when exceeding critical fault number p, easily because only namely the luminescence unit 100 of one or two fault loses the brightness of whole string luminescence unit 100, decline to a great extent making the luminous efficiency of Integral luminous module 10.For example, when in light emitting module 10, the number m of luminescence unit string is 4, and the number n of the luminescence unit 100 had in each string is when being 13, if the number x of wherein a string fault is 2, then this string makes Integral luminous module 10 decrease the brightness of 13 luminescence units 100 by because of directly closing.
Therefore, in the present invention, control module 12 works as luminescence unit string wherein a string out of order situation in judgement, and when number of defects x is more than or equal to critical fault number p, to luminescence unit 100 short circuit of fault in this string be made, and make (x-p+1) individual luminescence unit in each luminescence unit string outside this string also with short circuit.
Please refer to Fig. 2.Fig. 2 is in this disclosure one embodiment, and the luminescence unit string of light emitting module 10 produces the circuit diagram of failure situations.
For example, when control module 12 is judging in light emitting module 10,1st row the 1st arranges and the 1st row the 2nd row (namely have Vy (1,1) and Vy (1,2) pressure drop person) for fault luminescence unit 200 time, by controlling the paralleling switch 104 in parallel with light-emitting component 200, with luminescence unit 100 short circuit by fault.In addition, control module 12 will make further the 2nd walk to the capable luminescence unit string of m wherein in the short circuit of (2-2+1=1) luminescence unit.In the present embodiment, control module 12 is that luminescence unit 210 short circuit walking to capable each 1st row of m by the 2nd (namely has Vy (2,1) ... Vy (m, 1) pressure drop person).It is noted that the above-mentioned short circuit carried out luminescence unit, all can refer to control paralleling switch 104 conducting of its inside to carry out short circuit to light-emitting component 102 by control module 12.
Therefore, except the 1st string has two luminescence units 100 and cannot operate, other each strings all have a luminescence unit 100 be shorted and do not operate.Due to often string can current sinking produce pressure drop element reduce, therefore control module 12 can adjust direct voltage Vdc further, do not cause the element in each luminescence unit string to be damaged to make direct voltage Vdc decline, and still can make each string luminescence unit 100 regular event.
Therefore, as with the number m of luminescence unit string for 4, and in each string, luminescence unit 100 number n is the situation of 13 is example, when processing the situation of luminescence unit 100 fault in the manner of the present invention, each luminescence unit during two luminescence units and 2nd ~ 4 that only need close the 1st string are gone here and there, the luminescence unit 100 of five altogether, its with directly to close the situation that whole string luminescence unit 100 causes 13 (comprising fault) luminescence unit 100 cannot operate and compare down, cause the problem that light emitting module 10 luminous efficiency declines when significantly can improve luminescence unit 100 fault.
In above-mentioned mode, as being 3 (x=3) at the number damaged with the luminescence unit 100 in a string and critical fault number is 2(p=2), then control module 12 is except by except 3 of fault luminescence unit short circuits, also by two ((x-p+1)=(3-2+1)=2) short circuits in each luminescence unit string of other outside this string.
But, in an embodiment, when the number x of control module 12 failure judgement is too much, and when making the luminescence unit 100 in other strings of closedown not meet benefit, also directly can close this luminescence unit string.Meaning namely, as there is fault luminescence unit a specific string in the number of luminescence unit 100 of non-short circuit be (n-x), the number needing the luminescence unit 100 of short circuit under aforementioned mechanism is (m-1) * (x-p+1), then when control module 12 judges (m-1) *, (during x-p+1)≤(n-x), control module 12 is by this specific string of closedown.
For example, as arranged (m=4 at 4 row 13; N=13), in array, wherein a string number of defects is 4(x=4) and critical fault number is 2(p=2), then luminescence unit 100 number of non-short circuit is equivalent to (n-x)=(13-4)=9.As adjusted with above-mentioned mechanism, then altogether need to close (m-1) * (x-p+1)=(3) * (4-2+1)=9.Therefore, above-mentioned mechanism is favourable unlike the mode of directly closing this specific string, and now control module 12 directly can close this specific string.
If in same array, wherein a string number of defects is 5 (x=5), then luminescence unit 100 number of non-short circuit is equivalent to (n-x)=(13-5)=8.And altogether need to close (m-1) * (x-p+1)=(3) * (5-2+1)=12 as carried out adjusting with above-mentioned mechanism.Control module 12 can judge that the mode of closing this specific string comparatively meets benefit and closes this specific string.
Please refer to Fig. 3.Fig. 3 is in this disclosure one embodiment, the circuit diagram of two luminescence unit string generation failure situations in light emitting module 10.
In the present embodiment, light emitting module 10 is the array (m=5 that 5 row 13 arrange; N=13), and critical fault number is 2(p=2).Two luminescence unit strings in light emitting module 10, as shown in Figure 2 the 1st string and the 5th string, reach critical fault number p, wherein the 5th string have two fault luminescence units 200 and the 1st string have three fault luminescence units 200.As controlled in the mode of closing whole luminescence unit string, must short circuit reach 26 luminescence unit 100(5 former faults and 21 additionally to close).But as carried out in the manner of the present invention, then only need short circuit 11 luminescence units (5 fault luminescence units 200 and 6 luminescence units 210 of additionally closing).
In an embodiment, if having the situation that y luminescence unit string produces fault simultaneously, and fault number is z, then control module 12 can judge whether following formula is set up further:
((m-1)*(x-p+1)-z)≧((n-x)*y+(p-1)*(y-1))
As above formula is set up, then control module 12 directly will close this luminescence unit string.As being false, then control module 12 will only need (x-p+1) the individual luminescence unit 100 in other luminescence unit strings of short circuit.
Below the mechanism of carrying out the short circuit of luminescence unit 100 for control module 12 is described in detail.
In an embodiment, control module 12 by storage one the short circuit luminescence unit table of comparisons (not illustrating), to record the luminescence unit 100 whether fault of the luminescence unit 100 of short circuit in each luminescence unit string and this short circuit.Because control module 12 has judged whether luminescence unit 100 fault according to the cross-pressure value of the current control unit 140 corresponding to each luminescence unit string, therefore control module 12 only can the generation of failure judgement situation, but fault cannot be learnt be which.Therefore, when carrying out short action, sequentially one by one short circuit will be carried out to the luminescence unit 100 in this string, and check whether the cross-pressure value of current control unit 140 rises again, to judge whether the luminescence unit 100 being closed to normal operation.
When the luminescence unit 100 of normal operation is closed, the pressure drop of its script makes the cross-pressure value of current control unit 140 rise by transferring to current control unit 140.Therefore control module 12 is opened again by making the paralleling switch 104 of this luminescence unit 100, and to make luminescence unit 100 revert to path, light-emitting component 102 can continue normal running.And when control module 12 judges that the cross-pressure value of current control unit 140 does not rise, namely represent that the luminescence unit 100 of institute short circuit is the luminescence unit 200 of fault, and by the outcome record of short circuit in the short circuit luminescence unit table of comparisons.
Whether, in an embodiment, control module 12 more judges in a specific string according to the short circuit luminescence unit table of comparisons, have and can the luminescence unit 100 of normal operation be shorted.When the luminescence unit 100 of this specific string produces the situation of fault, control module 12 judges whether the number k of these " short circuit but normally luminescence unit " is less than or equal to the number x of the luminescence unit 100 of fault further.
When k is less than or equal to x, control module 12 will carry out short circuit to fault luminescence unit 200, and recover these the non-fault luminescence unit of short circuit for path.And when k is greater than x, control module 12 will carry out short circuit to fault luminescence unit 200, and the individual non-fault luminescence unit of short circuit of x is made to revert to path.Control module 12 will change the short circuit luminescence unit table of comparisons further, in new short circuit result being stored in.
For other luminescence unit strings beyond specific string, control module 12 also can carry out the mechanism of short circuit according to the short circuit luminescence unit table of comparisons.
In an embodiment, when carrying out the short circuit of each luminescence unit string outside this specific string, control module 12, according to the short circuit luminescence unit table of comparisons, judges whether the luminescence unit 100 of each luminescence unit string has the luminescence unit 100 of short circuit.When there is the luminescence unit 100 of short circuit and the number q of these short circuit luminescence units 100 is more than or equal to (x-p+1), control module 12 does not carry out short circuit, when the number q of the luminescence unit of short circuit of luminescence unit is less than (x-p+1), control module 12 makes the luminescence unit short circuit of (x-p+1-q) individual non-short circuit.
For example, as arranged (m=4 at 4 row 13; N=13) in array, the number of luminescence unit 100 fault of the 1st string is 3 (x=3) and critical fault number is 2(p=2), then the 2nd string is respectively two ((x-p+1)=(3-2+1)=2) to the 4th string for the luminescence unit 100 carrying out short circuit.If now the 2nd string to the 4th string wherein a string have be shorted more than two luminescence units 100 time, then namely control module 12 does not need to carry out short circuit to the luminescence unit 100 of this string again.And if other luminescence unit strings now outside specific string wherein a string has a luminescence unit 100 when being shorted, then control module 12 only needs to carry out short circuit to ((x-p+1-q)=(3-2+1-1)=1) in the luminescence unit 10 of remaining non-short circuit.
Therefore, after auxiliary by above-mentioned mechanism, can carry out having more flexible control for light emitting module 10, and while avoiding component wear, the brightness of light emitting module 10 can be maintained as much as possible.
It is noted that in the above embodiments, be described for the corresponding luminescence unit string of a current control unit.In other embodiments, current control unit may correspond to the luminescence unit string be in parallel to two or more, and is carried out controlling to the switch of luminescence unit in above-mentioned mode by control module and adjust.
Please refer to Fig. 4.Fig. 4 is in this disclosure one embodiment, a kind of flow chart of light-emitting device control method 400.Light-emitting device control method 400 can be applicable to light-emitting device 1 as shown in Figure 1A and 1B, but not as limit.Light-emitting device control method 400 comprises the following step (should be appreciated that, step mentioned in the present embodiment, except chatting its order person bright especially, all can adjust its tandem according to actual needs, even can perform simultaneously or partly simultaneously).
In step 401, the light emitting module 1 making to have the array of the capable and n row luminescence unit 100 of m operates.
In step 402, captured the cross-pressure value of current control unit 140 corresponding to each luminescence unit string by control module 12, judge the luminescence unit 100 whether fault of each luminescence unit string further in step 403.When the luminescence unit of this specific string does not break down, flow process will be back to step 402.
When the luminescence unit of this specific string breaks down, whether control module 12 is more than or equal to critical fault number p in step 404 failure judgement number x.When the number of defects is less than critical fault number p, control module 12 will be failure to actuate, and flow process will be back to step 402.
When control module in step 403 12 failure judgement number x is more than or equal to critical fault number p, control module 12 judges whether the number of the luminescence unit of each luminescence unit string institute short circuit had outside the specific string of fault luminescence unit is more than or equal to the number of the luminescence unit 100 of non-short circuit in specific string further in step 405.This means, judge whether following formula is set up:
(m-1)*(x-p+1)≧(n-x)
As immediately, control module 12 directly closes this specific string in step 406.
Do not become immediately, control module 12 makes fault luminescence unit 200 short circuit in specific string in step 407 and makes (x-p+1) individual luminescence unit 210 short circuit in each luminescence unit string outside specific string, and downgrades the direct voltage Vdc of each luminescence unit serial connection receipts in step 408.
Although this disclosure discloses as above with execution mode; so itself and be not used to limit this disclosure; any those skilled in the art; not departing from the spirit and scope of this disclosure; when being used for a variety of modifications and variations, therefore the protection range of this disclosure is when being as the criterion depending on the appended right person of defining that applies for a patent.
Claims (18)
1. a light-emitting device, comprises:
One light emitting module, comprises multiple luminescence unit string, and respectively this luminescence unit string comprises the multiple luminescence units be in series, and wherein respectively one end of this luminescence unit string receives a direct voltage jointly;
One brightness adjustment control bus, comprises multiple current control unit, and each at least one of them is connected with this luminescence unit string, to control an electric current of respectively this luminescence unit string;
One control module, in order to a cross-pressure value of each this current control unit of acquisition, judges this luminescence unit whether fault of respectively this luminescence unit string further; And
When this luminescence unit of a specific string of this luminescence unit string breaks down and a number of defects x is more than or equal to a critical fault number p, this control module makes this luminescence unit short circuit of fault in this specific string and makes (x-p+1) this luminescence unit short circuit individual in respectively this luminescence unit string outside this specific string, to downgrade this direct voltage that respectively this luminescence unit serial connection is received.
2. light-emitting device as claimed in claim 1, wherein the number m of this luminescence unit string is less than the number n of this luminescence unit that respectively this luminescence unit string comprises.
3. light-emitting device as claimed in claim 2, wherein when number (m-1) * (x-p+1) of respectively this luminescence unit of this luminescence unit string institute short circuit that this control module judges outside this specific string is more than or equal to number (n-x) of this luminescence unit of non-short circuit in this specific string, this control module closes this specific string.
4. light-emitting device as claimed in claim 1, wherein respectively this luminescence unit more comprises a light-emitting component and a paralleling switch, and this control module is by controlling this paralleling switch conducting with this light-emitting component corresponding to short circuit.
5. light-emitting device as claimed in claim 1, wherein this control module store one the short circuit luminescence unit table of comparisons with at least one luminescence unit of short circuit in record respectively this luminescence unit string and this short circuit luminescence unit whether fault.
6. light-emitting device as claimed in claim 5, wherein this control module is in time carrying out this specific string short circuit, judge whether to carry out short circuit to the normal operation person wherein of this luminescence unit in this specific string, with when to this normal operation person's short circuit, make this normal operation person revert to path.
7. light-emitting device as claimed in claim 6, wherein this control module more according to this short circuit luminescence unit table of comparisons judge whether this luminescence unit of this specific string has at least one normal luminous of short circuit unit, with make when the number k of this short circuit normal luminous unit is less than or equal to this number of defects x this short circuit normal luminous unit revert to path, and make when k is greater than x x this short circuit normal luminous unit revert to path.
8. light-emitting device as claimed in claim 6, wherein this specific string of control module sequentially short circuit this luminescence unit one of them and according to this cross-pressure value of this current control unit judge whether to this short circuit normal luminous unit carry out short circuit.
9. light-emitting device as claimed in claim 5, wherein this control module is in time carrying out respectively this luminescence unit string short circuit outside this specific string, according to this short circuit luminescence unit table of comparisons judge whether respectively this luminescence unit string outside this specific string has this short circuit luminescence unit, when the number q of this short circuit luminescence unit is more than or equal to (x-p+1), this control module does not carry out short circuit, when the number q of this short circuit luminescence unit of this luminescence unit is less than (x-p+1), this control module makes this luminescence unit short circuit of (x-p+1-q) individual non-short circuit.
10. light-emitting device as claimed in claim 2, wherein when y this luminescence unit string produces the situation of fault and fault number is z, and (during (m-1) * (x-p+1)-z)≤((n-x) * y+ (p-1) * (y-1)), this control module closes y this luminescence unit string.
11. 1 kinds of light-emitting device control methods, comprise:
Make a light emitting module running of a light-emitting device, wherein this light emitting module comprises multiple luminescence unit string, and respectively this luminescence unit string comprises the multiple luminescence units be in series, and wherein respectively one end of this luminescence unit string receives a direct voltage jointly;
Capture multiple current control unit and divide other cross-pressure value, judge further this luminescence unit whether fault of respectively this luminescence unit string, wherein each this current control unit and this luminescence unit string to connect wherein; And
When this luminescence unit of a specific string of this luminescence unit string breaks down and a number of defects x is more than or equal to a critical fault number p, make this luminescence unit short circuit of fault in this specific string and make (x-p+1) this luminescence unit short circuit individual in respectively this luminescence unit string outside this specific string, to downgrade this direct voltage that respectively this luminescence unit serial connection is received.
12. light-emitting device control methods as claimed in claim 11, wherein the number m of this luminescence unit string is less than the number n of this luminescence unit that respectively this luminescence unit string comprises.
13. light-emitting device control methods as claimed in claim 12, wherein more comprising when judging that number (m-1) * (x-p+1) of respectively this luminescence unit of this luminescence unit string institute short circuit outside this specific string is more than or equal to number (n-x) of this luminescence unit of non-short circuit in this specific string, closing this specific string.
14. light-emitting device control methods as claimed in claim 11, wherein in the step of carrying out this specific string short circuit, more comprise and judge whether to carry out short circuit to the normal operation person wherein of this luminescence unit in this specific string, with when to this normal operation person's short circuit, this normal operation person is made to revert to path.
15. light-emitting device control methods as claimed in claim 14, wherein more comprise and judge whether this luminescence unit of this specific string has at least one normal luminous of short circuit unit, with make when the number k of this short circuit normal luminous unit is less than or equal to x this short circuit normal luminous unit revert to path, and make when k is greater than x x this short circuit normal luminous unit revert to path.
16. light-emitting device control methods as claimed in claim 14, wherein in the step of carrying out this specific string short circuit, more comprise this specific string of sequentially short circuit this luminescence unit one of them and judge whether to carry out short circuit to short circuit normal luminous unit according to this cross-pressure value of this current control unit.
17. light-emitting device control methods as claimed in claim 11, wherein in the step of carrying out respectively this luminescence unit string short circuit outside this specific string, whether this luminescence unit more comprising respectively this luminescence unit string judged outside this specific string has short circuit luminescence unit, when the number q of this short circuit luminescence unit is more than or equal to (x-p+1), do not carry out short circuit, when the number q of this short circuit luminescence unit is less than (x-p+1), make this luminescence unit short circuit of (x-p+1-q) individual non-short circuit.
18. light-emitting device control methods as claimed in claim 12, wherein more comprise the situation when y this luminescence unit string generation fault, fault number in each y this luminescence unit string is z, and (during (m-1) * (x-p+1)-z)≤((n-x) * y+ (p-1) * (y-1)), close y this luminescence unit string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310039108.7A CN103974492B (en) | 2013-01-31 | 2013-01-31 | Light-emitting device and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310039108.7A CN103974492B (en) | 2013-01-31 | 2013-01-31 | Light-emitting device and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103974492A CN103974492A (en) | 2014-08-06 |
| CN103974492B true CN103974492B (en) | 2016-03-30 |
Family
ID=51243383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310039108.7A Active CN103974492B (en) | 2013-01-31 | 2013-01-31 | Light-emitting device and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103974492B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116068455A (en) * | 2023-01-28 | 2023-05-05 | 宝邑(深圳)照明科技有限公司 | Lamp life prediction method, system, electronic equipment and medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007080984A1 (en) * | 2006-01-13 | 2007-07-19 | Sharp Kabushiki Kaisha | Illumination device and liquid crystal display device |
| WO2008005915A2 (en) * | 2006-07-05 | 2008-01-10 | Texas Instruments Incorporated | System for improving illumination reliability in projection display systems |
| CN102444808A (en) * | 2010-10-13 | 2012-05-09 | 罗业富 | Lamp point protection type high-power high-brightness LED light source module |
-
2013
- 2013-01-31 CN CN201310039108.7A patent/CN103974492B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007080984A1 (en) * | 2006-01-13 | 2007-07-19 | Sharp Kabushiki Kaisha | Illumination device and liquid crystal display device |
| WO2008005915A2 (en) * | 2006-07-05 | 2008-01-10 | Texas Instruments Incorporated | System for improving illumination reliability in projection display systems |
| CN102444808A (en) * | 2010-10-13 | 2012-05-09 | 罗业富 | Lamp point protection type high-power high-brightness LED light source module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103974492A (en) | 2014-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106531081B (en) | A kind of display module driving device and method | |
| CN102122483B (en) | Method and system for monitoring LED (light-emitting diode) display screen as well as LED display | |
| US8928231B2 (en) | Open LED detection and recovery system for LED lighting system | |
| CN106847180B (en) | The luminance compensation system and luminance compensation method of OLED display | |
| CN104066234B (en) | Light emitting element driving circuit and control circuit thereof and method | |
| CN101762772B (en) | Fault detection device for LED driving circuit and detection method thereof | |
| TWI458216B (en) | Light emitting diode luminance system having clamping device | |
| DE102014110263A1 (en) | Luminaire element lighting assembly, light module, lighting device and lighting element lighting method | |
| CN103945598B (en) | Light-emitting component power supply circuit, control circuit and light-emitting element circuit recognition methods | |
| CN103974492B (en) | Light-emitting device and control method thereof | |
| CN101778508B (en) | Driving circuit and method of light emitting diode | |
| CN202058414U (en) | Monitoring system for LED display screen and LED display | |
| TWI492663B (en) | Light-emitting device and control method of the same | |
| CN202488822U (en) | Light-emitting component control circuit and short-circuit detection circuit applied to same | |
| EP2489240A1 (en) | Electronic driver apparatus for large area solid-state leds | |
| CN106559933B (en) | Traffic lights circuit arrangement | |
| CN102186288B (en) | Intelligent LED (Light Emitting Diode) driving chip | |
| CN102661585A (en) | LED (Light-Emitting Diode) device with function of simultaneously detecting open circuit and short circuit and method thereof | |
| CN103796373A (en) | Light-emitting diode illumination system with clamping device | |
| CN108230974A (en) | A kind of luminescent device defect detection circuit and method, display drive apparatus, display device and its detection method | |
| CN103841720B (en) | Light emitting diode driving device and operation method thereof | |
| CN102444808A (en) | Lamp point protection type high-power high-brightness LED light source module | |
| CN102612201B (en) | Light emitting diode driving circuit and system thereof | |
| CN100562911C (en) | LED drive and use its display device | |
| CN215499659U (en) | Outdoor LED lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |