CN108966416A - A kind of control system of UV LED light source - Google Patents
A kind of control system of UV LED light source Download PDFInfo
- Publication number
- CN108966416A CN108966416A CN201810758295.7A CN201810758295A CN108966416A CN 108966416 A CN108966416 A CN 108966416A CN 201810758295 A CN201810758295 A CN 201810758295A CN 108966416 A CN108966416 A CN 108966416A
- Authority
- CN
- China
- Prior art keywords
- module
- light source
- electrically connected
- pwm
- current
- 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.)
- Granted
Links
- 238000005070 sampling Methods 0.000 claims description 30
- 238000003860 storage Methods 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 101100112673 Rattus norvegicus Ccnd2 gene Proteins 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Device Packages (AREA)
- Led Devices (AREA)
Abstract
The embodiment of the invention discloses a kind of control systems of UV LED light source, comprising: UV LED UVLED light source module, current acquisition module, setting electric current output module, comparison module and pulse width modulation (PWM) module；UVLED light source module is for issuing ultraviolet；Current acquisition module is electrically connected with UVLED light source module, for acquiring the operating current of UVLED light source；Comparison module is electrically connected with setting electric current output module and current acquisition module respectively, for exporting setting electric current and operating current to comparison module；Comparison module is used to generate control signal according to setting electric current and operating current；Comparison module is electrically connected with PWM module, for sending control signals to PWM module；PWM module is used to generate PWM drive signal according to control signal, and drives UVLED light source by PWM drive signal.Technical solution provided in an embodiment of the present invention can solve the problems, such as that the control mode of existing UVLED light source causes the light decay period of UVLED light source shorter.
Description
Technical field
The present embodiments relate to Organic Light Emitting Diode field more particularly to a kind of controls of UV LED light source
System processed.
Background technique
UV LED (Ultraviolet Light Emitting Diode, UVLED) is one kind of LED light,
The black light of Single wavelength is issued, wavelength is generally in 400nm or less.UVLED light source is arranged to different shape, different irradiation level
Hot spot, meet the production needs in the fields such as edge sealing, printing.UVLED light source has the service life of overlength, and performance is stablized, and has
Bactericidal effect has a wide range of applications in every field such as printing, industry solidification, anti-fake, disinfection and sterilization and medical treatment.
It is mostly constant pressure control system to the conventional ADS driving mode of UVLED light source, with the UVLED light source working time
Increase, the junction temperature of UVLED light source increases, and the junction temperature of UVLED light source is chronically at high value, leads to the light decay week of UVLED light source
Phase shortens.When multiple UVLED light sources complete photoetching or curing process jointly, the big UVLED light source of light decay degree and light decay journey
The intensity of illumination for spending small UVLED light source is different, causes the Energy distribution of multiple UVLED light sources uneven.
Summary of the invention
The present invention provides a kind of control system of UV LED light source, to solve the control of existing UVLED light source
Mode leads to the light decay period of UVLED light source shorter problem.
The embodiment of the invention provides a kind of organic light emitting display panels, comprising: UV LED UVLED light source die
Block, current acquisition module, setting electric current output module, comparison module and pulse width modulation (PWM) module；
The UVLED light source module is used to issue ultraviolet by UVLED light source；The current acquisition module with it is described
UVLED light source module electrical connection, for acquiring the operating current for flowing through the UVLED light source；
The comparison module is electrically connected with the setting electric current output module and the current acquisition module respectively, and being used for will
The setting electric current of the setting electric current output module output is exported with the operating current that the current acquisition module exports to described
Comparison module；The comparison module generates control signal for the setting electric current and the operating current to be compared；
The comparison module is electrically connected with the PWM module, for the control signal to be sent to the PWM module；
The PWM module is used to generate PWM drive signal according to the control signal；
The PWM module is electrically connected with the UVLED light source module, for by described in PWM drive signal driving
UVLED light source.
Optionally, the UVLED light source module is booster type switching circuit.
Optionally, the booster type switching circuit includes: first switch, the first inductance, first diode and storage electricity
Hold；The control terminal of the first switch is electrically connected with the PWM output end of the PWM module, and passes through the first divider resistance and ground
End electrical connection；First end is electrically connected with ground terminal；Second end respectively with the first end and the first diode of first inductance
Anode electrical connection；The second end of first inductance is electrically connected with the first level output end；The cathode of the first diode
It is electrically connected respectively with the first end of the first end of the storage capacitance and the UVLED light source；The second end of the storage capacitance
It is electrically connected with ground terminal；The second end of the UVLED light source connects ground terminal.
Optionally, the current acquisition module includes: the first sampling resistor；The first end of first sampling resistor is distinguished
It is electrically connected with the first input end of the second end of the UVLED light source and the comparison module, second end is electrically connected with ground terminal, is used
In converting voltage signal by current signal for the operating current of acquisition, and it is sent to the comparison module.
Optionally, the control system of UV LED light source further include: current detection module；The current detecting mould
Block includes the second sampling resistor；The first end of second sampling resistor is electrically connected with the second end of the first switch, and second
End connection ground terminal；The first end of second sampling resistor is also electrically connected with the current detecting end of the PWM module, for controlling
The peak value of the operating current.
Optionally, the PWM module further includes adjusting capacitor and the second divider resistance, for adjusting the first switch
Switching frequency；It is described adjust capacitor first end connect ground terminal, second end respectively with the frequency adjustable side of the PWM module and institute
State the first end electrical connection of the second divider resistance；The second end of second divider resistance and the reference voltage of the PWM module
End electrical connection.
Optionally, the comparison module includes: comparator；The first input end of the comparator and the current acquisition mould
The output end of block is electrically connected, for obtaining the operating current of the current acquisition module acquisition；Second input terminal with it is described
The output end of setting electric current output module is electrically connected, for obtaining the setting electric current；The feedback of output end and the PWM module
End electrical connection, for the control signal to be sent to the PWM module.
Optionally, the setting electric current output module includes: current signal converting unit and amplifier；The current signal
The input terminal of converting unit is electrically connected with setting electric current output end, for the setting electric current to be converted to voltage by current signal
Signal, output end are electrically connected with the input terminal of the amplifier, and the setting electric current for being converted into voltage signal amplifies
Processing；The output end of the amplifier is electrically connected with the comparison module, for passing the setting electric current after enhanced processing
Transport to the comparison module.
Optionally, the control system of UV LED light source further include: voltage acquisition module, with the UVLED light
Source module electrical connection, for acquiring the operating voltage of the UVLED light source；And be electrically connected with the PWM module, being used for will be described
Operating voltage is transmitted to the PWM module；The PWM module is also used to according to the operating voltage to the PWM drive signal
It is adjusted.
Optionally, the voltage acquisition module includes: third sampling resistor, slide rheostat and the 4th sampling resistor；
The first end of the third sampling resistor is electrically connected with the first end of the UVLED light source, second end and the slide rheostat
First end electrical connection；The second end of the slide rheostat respectively with the control terminal of the slide rheostat, the PWM module
Feedback end and the 4th sampling resistor first end electrical connection；The second end of 4th sampling resistor connects ground terminal.
The control system of UV LED light source provided in an embodiment of the present invention is formed using current acquisition module
Feed circuit forms constant current closed-loop control system with UVLED light source module, comparison module and PWM module, by UVLED light source
The real work electric current of the UVLED light source of module constantly corrects the real work electricity of UVLED light source compared with setting electric current
Stream, so that real work electric current reaches the current value of setting, so that UVLED light source obtains constant operating current, it can be significantly
The equalization of intensity of UVLED light source is improved, light decay is reduced, extends the service life of UVLED light source, solves existing
The UVLED light source light decay period caused by the control mode of UVLED light source shortens, and the Energy distribution of multiple UVLED light sources is uneven
The problem of.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the control system of UV LED provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the control system of another UV LED provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
The embodiment of the present invention provides a kind of control system of UV LED light source, is the present invention with reference to Fig. 1, Fig. 1
A kind of structural schematic diagram of the control system for UV LED that embodiment provides, the control of the UV LED light source
System processed includes:
UV LED UVLED light source module 11, setting electric current output module 13, compares current acquisition module 12
Module 14 and pulse width modulate (Pulse Width Modulation, PWM) module 15；
UVLED light source module 11 is used to issue ultraviolet by UVLED light source；Current acquisition module 12 and UVLED light
Source module 11 is electrically connected, for acquiring the operating current for flowing through UVLED light source；
Comparison module 14 is electrically connected with setting electric current output module 13 and current acquisition module 12 respectively, for that will set electricity
The operating current that the setting electric current and current acquisition module 12 that stream output module 13 exports export is exported to comparison module 14；Compare
Module 14 generates control signal for setting electric current and operating current to be compared；
Comparison module 14 is electrically connected with PWM module 15, for sending control signals to PWM module 15；PWM module 15 is used
According to control signal generation PWM drive signal；
PWM module 15 is electrically connected with UVLED light source module 11, for driving UVLED light source by PWM drive signal.
The constant pressure driving method of traditional UVLED light source, because the UVLED light source of constant pressure driving can be with the growth of time
Fever, and operating current can have the case where rated current that certain moment are greater than UVLED light source, so that UVLED light source core
Chemical transport occurs inside piece, so as to cause light decay.The present embodiment is using constant current driving method, firstly, according to UVLED light
Intensity of illumination required for the factory datas such as rated power, the rated current in source and curing process determines setting electric current value, and
Moment acquires the operating current of UVLED light source, exports the operating current of UVLED light source and setting electric current by comparing module 14
The setting electric current that module 13 exports compares, difference of the comparison module 14 according to setting electric current and real work electric current, automatic tune
Section control signal.PWM module 15 increases or reduces UVLED light according to the pulse width of control signal adjustment PWM drive signal
The real work electric current in source, to complete entire operating current adjustment process.Illustratively, when the operating current of UVLED light source
When greater than setting electric current, the pulse width of PWM drive signal is narrowed, the amplitude of the power boost of UVLED light source module 11 becomes
It is small, so that the operating current of UVLED light source becomes smaller；When the operating current of UVLED light source is less than setting electric current, PWM driving letter
Number pulse width broaden, the amplitude of the power boost of UVLED light source module 11 becomes larger, so that the operating current of UVLED light source
Become larger, so recycles, so that the operating current of UVLED light source reaches dynamic equilibrium near setting electric current.
Driving circuit of the UVLED light source module 11 as UVLED light source drives UVLED light source working.UVLED light source one
As include multiple array arrangements UVLED, the UVLED of array arrangement is set on substrate, and the array arrangement shape of UVLED can root
It is adjusted according to area to be solidified, for example, UVLED array arrangement is rectangular, if to be solidified if area to be solidified is rectangle
Area is circle, then UVLED array arrangement is at circle.In use, multiple substrates for being provided with UVLED light source can be spelled
It is connected into the solidification area of needs, the light source light decay period is shorter because traditional UVLED light source control method leads to UVLED, holds very much
The problem of easily causing the UVLED light source intensity of different substrate to be unevenly distributed influences exposure and solidification effect, provided in this embodiment
The control system of UVLED light source is able to extend the light decay period of UVLED light source, solves the UVLED light source intensity point of different substrate
The problem of cloth unevenness.
The control system of UV LED light source provided in an embodiment of the present invention is formed using current acquisition module
Feed circuit forms constant current closed-loop control system with UVLED light source module, comparison module and PWM module, by UVLED light source
The real work electric current of the UVLED light source of module constantly corrects the real work electricity of UVLED light source compared with setting electric current
Stream, so that real work electric current reaches the current value of setting, so that UVLED light source obtains constant operating current, it can be significantly
The equalization of intensity of UVLED light source is improved, light decay is reduced, extends the service life of UVLED light source, solves existing
The UVLED light source light decay period caused by the control mode of UVLED light source shortens, and the Energy distribution of multiple UVLED light sources is uneven
The problem of.
It optionally, is the control system of another UV LED provided in an embodiment of the present invention with reference to Fig. 2, Fig. 2
Structural schematic diagram, UVLED light source module 11 can be booster type switching circuit.Compared to the switching circuit of voltage-dropping type, this reality
Apply the booster type of use switching circuit have the advantages that it is certain.For example, booster type is opened when constant-current control circuit breaks down
The supply voltage on powered-down road can be lower than the voltage rating of UVLED light source, will not burn out the chip of UVLED light source, and voltage-dropping type is opened
The supply voltage on powered-down road is above the voltage rating of UVLED light source, is easy to burn out the chip of UVLED light source.In addition, boosting
Type switching circuit can also protect personal safety, in the case where booster type switching circuit does not access UVLED light source, circuit output
End is exactly supply voltage, and the supply voltage of booster type switching circuit is small, can reduce the injury to the person to a certain extent.But
It is for adjusting and voltage-reduction switch circuit, when not accessing UVLED light source, if people accidentally touches circuit output end, because of drop
The supply voltage of die mould switching circuit is excessive, is very easy to that electric shock phenomenon occurs.
Optionally, with continued reference to Fig. 2, booster type switching circuit may include: first switch Q1, the first inductance L1, first
Diode D1 and storage capacitance C1；The control terminal of first switch Q1 is electrically connected with the PWM output end OUT of PWM module 15, and is led to
The first divider resistance R1 is crossed to be electrically connected with ground terminal GND；First end is electrically connected with ground terminal GND；Second end respectively with the first inductance L1
First end and first diode D1 anode electrical connection；The second end of first inductance L1 is electrically connected with the first level output end VI
It connects；The cathode of first diode D1 is electrically connected with the first end of the first end of storage capacitance C1 and UVLED light source J3 respectively；Storage
The second end of capacitor C1 is electrically connected with ground terminal GND；The second end of UVLED light source J3 connects ground terminal GND.
With reference to the course of work of Fig. 2, the present embodiment booster type switching circuit used are as follows: when first switch Q1 conducting,
The electric current of booster type switching circuit flows through the first inductance L1, and the first inductance L1 is linearly increasing, and electric energy is stored in the form of magnetic energy
In first inductance L1.At this point, storage capacitance C1 discharges, it is enhanced discharge and charging effect, settable multiple storage electricity optionally
It is in parallel to hold C1, illustratively, as shown in Fig. 2, storage capacitance C1 enhancing storage and discharge effect that setting two is in parallel.Due to
The anode of one switch Q1 conducting, first diode D1 is negative voltage, and first diode D1 reversely ends, and storage capacitance C1 cannot lead to
First diode D1 electric discharge is crossed, is discharged by UVLED light source J3.When first switch Q1 shutdown, in the first inductance L1
Magnetic field will change the polarity of voltage at the first both ends inductance L1, to keep the current direction of the first inductance L1 constant.First inductance L1
In the voltage that is converted into of magnetic energy and the first level output end VI input the first level VISeries connection, powers to the load together, defeated
Voltage V outOGreater than input voltage VI, boost process is realized, as input voltage VIIt is higher than output with the sum of the voltage of the first inductance L1
Voltage VOWhen, storage capacitance C1 charges.
The control terminal of first switch Q1 is electrically connected by current-limiting resistance R6 with the PWM output end OUT of PWM module 15, current limliting
The value of resistance R6 determines the switching speed of first switch Q1, several ohm of general value to several hundred ohms.
Optionally, with continued reference to Fig. 2, current acquisition module 12 may include: the first sampling resistor R3；First sampling resistor
The first end Vsen of R3 is electrically connected with the first input end Vin1 of the second end of UVLED light source J3 and comparison module 14 respectively, the
Two ends are electrically connected with ground terminal GND, for converting voltage signal by current signal for the operating current of acquisition, and are sent to and are compared
Module 14.
Optionally, comparison module 14 may include: comparator；The first input end Vin1 and current acquisition module of comparator
12 output end Vsen electrical connection, for obtaining the operating current of the acquisition of current acquisition module 12；Second input terminal Vin2 with set
The output end of constant current output module 13 is electrically connected, for obtaining setting electric current；The feedback end FB electricity of output end and PWM module 15
Connection, for sending control signals to PWM module.
Optionally, first input end Vin1 is the positive input terminal of comparator, and the second input terminal Vin2 is that bearing for comparator is defeated
Enter end.Comparator makes the difference positive input terminal and negative output terminal, and generates corresponding control according to the size of difference and believe
Number, and control signal is exported by the output end vo ut of comparator to the feedback end FB of PWM module 15.
Optionally, with reference to Fig. 2, setting electric current output module 13 may include: current signal converting unit 131 and amplifier
132；The input terminal of current signal converting unit 131 is electrically connected with setting electric current output end J2, is used for setting electric current by electric current
Signal is converted to voltage signal；Output end is electrically connected with amplifier 132, and the setting electric current for being converted into voltage signal carries out
Enhanced processing；The output end of amplifier 132 is electrically connected with comparison module 14, for the setting electric current after enhanced processing to be transmitted to
Comparison module 14.Illustratively, as shown in Fig. 2, the second input terminal Vin2 electricity of the output end of amplifier 132 and comparison module 14
Connection.
Optionally, with reference to Fig. 2, the control system of UV LED light source can also include: current detection module 16；
Current detection module 16 includes the second sampling resistor R2；The first end of second sampling resistor R2 and the second end electricity of first switch Q1
Connection, second end connect ground terminal GND；The first end of second sampling resistor R2 also with the current detecting end I of PWM module 15SIt is electrically connected
It connects, for controlling the peak value of operating current.
The electric current for flowing through first switch Q1 is converted to voltage signal by current signal by the second sampling resistor R2, this signal with
After the error amplifier voltage of setting inside PWM module 15 is compared, the operating current of UVLED light source module 11 is controlled
Peak value, be able to detect circuit overcurrent, short circuit situations such as, guarantee UVLED light source module 11 work stability.Divider resistance R5 and
Filter capacitor C3 forms filter circuit, for input electric cur- rent measure end ISVoltage signal be filtered.
Optionally, PWM module 15 can also include adjusting capacitor C2 and the second divider resistance R4, for adjusting first switch
The switching frequency of Q1；Adjust capacitor C2 first end connect ground terminal GND, second end respectively with the frequency adjustable side of PWM module 15
The electrical connection of the first end of RT and the second divider resistance R4；The second end of second divider resistance R4 and the reference voltage of PWM module 15
Hold VREF electrical connection.
The switching frequency that capacitor C2 and the second divider resistance R4 determines first switch Q1 is adjusted, illustratively, if second
The resistance value of divider resistance R4 is 8k Ω, and the duty ratio for the PWM drive signal that PWM module 15 exports can reach 95%, adjusts capacitor
When C2 is 5nF, working frequency 50kHz.
With reference to Fig. 2, the compensating end COMP, Neng Gougai of PWM module 15 are connected after current-limiting resistance R7 is in parallel with capacitor C4 is adjusted
The gain and frequency characteristic of kind error amplifier.
Optionally, with continued reference to Fig. 2, the control system of UV LED light source can also include: voltage acquisition mould
Block 17 is electrically connected with UVLED light source module 11, for acquiring the operating voltage of UVLED light source J3；And it is electrically connected with PWM module 15
It connects, for operating voltage to be transmitted to PWM module 15；PWM module 15 is also used to carry out PWM drive signal according to operating voltage
It adjusts.
The present embodiment is also right while carrying out detection and feedback regulation by the operating current to UVLED light source J3
The operating voltage of UVLED light source J3 is adjusted, to be further ensured that the stability of the work of UVLED light source module 11.This implementation
The control system of the UV LED light source of example is also provided with voltage acquisition module 17, the output end of voltage acquisition module 17
It is electrically connected with the feedback end FB of PWM module 15, the present embodiment is in such a way that current feedback and Voltage Feedback combine, more closed loops
It realizes current constant control technology, is greatly improved the distribution of light sources uniformity of UVLED light source, reduce light decay, extend UVLED light source
Service life.
Optionally, voltage acquisition module 17 may include: that third sampling resistor R8, slide rheostat R10 and the 4th are adopted
Sample resistance R9；The first end of third sampling resistor R8 is electrically connected with the first end of UVLED light source J3, second end and slide rheostat
The first end of R10 is electrically connected；The second end of slide rheostat R10 respectively with the control terminal of slide rheostat R10, PWM module 15
Feedback end FB and the 4th sampling resistor R9 first end electrical connection；The second end of 4th sampling resistor R9 connects ground terminal GND.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts, be combined with each other and substitutes without departing from protection scope of the present invention.Therefore, although by above embodiments to this
Invention is described in further detail, but the present invention is not limited to the above embodiments only, is not departing from present inventive concept
In the case of, it can also include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of control system of UV LED light source characterized by comprising UV LED UVLED light
Source module, current acquisition module, setting electric current output module, comparison module and pulse width modulation (PWM) module；
The UVLED light source module is used to issue ultraviolet by UVLED light source；The current acquisition module with it is described
UVLED light source module electrical connection, for acquiring the operating current for flowing through the UVLED light source；
The comparison module is electrically connected with the setting electric current output module and the current acquisition module respectively, and being used for will be described
The setting electric current of setting electric current output module output is exported with the operating current that the current acquisition module exports to compared with described
Module；The comparison module generates control signal for the setting electric current and the operating current to be compared；
The comparison module is electrically connected with the PWM module, for the control signal to be sent to the PWM module；It is described
PWM module is used to generate PWM drive signal according to the control signal；
The PWM module is electrically connected with the UVLED light source module, for driving the UVLED by the PWM drive signal
Light source.
2. the control system of UV LED light source according to claim 1, which is characterized in that the UVLED light
Source module is booster type switching circuit.
3. the control system of UV LED light source according to claim 2, which is characterized in that the booster type is opened
Powered-down road includes: first switch, the first inductance, first diode and storage capacitance；
The control terminal of the first switch is electrically connected with the PWM output end of the PWM module, and passes through the first divider resistance and ground
End electrical connection；First end is electrically connected with ground terminal；Second end respectively with the first end and the first diode of first inductance
Anode electrical connection；
The second end of first inductance is electrically connected with the first level output end；The cathode of the first diode respectively with it is described
The first end of storage capacitance and the electrical connection of the first end of the UVLED light source；
The second end of the storage capacitance is electrically connected with ground terminal；The second end of the UVLED light source connects ground terminal.
4. the control system of UV LED light source according to claim 3, which is characterized in that the current acquisition
Module includes: the first sampling resistor；
The first end of first sampling resistor is defeated with the first of the second end of the UVLED light source and the comparison module respectively
Enter end electrical connection, second end is electrically connected with ground terminal, for converting voltage letter by current signal for the operating current of acquisition
Number, and it is sent to the comparison module.
5. the control system of UV LED light source according to claim 3, which is characterized in that further include: electric current
Detection module；The current detection module includes the second sampling resistor；
The first end of second sampling resistor is electrically connected with the second end of the first switch, and second end connects ground terminal；It is described
The first end of second sampling resistor is also electrically connected with the current detecting end of the PWM module, for controlling the operating current
Peak value.
6. according to the control system of the described in any item UV LED light sources of claim 3-5, it is characterised in that: described
PWM module further includes adjusting capacitor and the second divider resistance, for adjusting the switching frequency of the first switch；
The first end for adjusting capacitor connects ground terminal, second end respectively with the frequency adjustable side of the PWM module and described the
The first end of two divider resistances is electrically connected；The second end of second divider resistance and the reference voltage terminal electricity of the PWM module
Connection.
7. the control system of UV LED light source according to claim 1, which is characterized in that the comparison module
It include: comparator；
The first input end of the comparator is electrically connected with the output end of the current acquisition module, is adopted for obtaining the electric current
Collect the operating current of module acquisition；Second input terminal is electrically connected with the output end of the setting electric current output module, is used for
Obtain the setting electric current；Output end is electrically connected with the feedback end of the PWM module, for the control signal to be sent to institute
State PWM module.
8. the control system of UV LED light source according to claim 1, which is characterized in that the setting electric current
Output module includes: current signal converting unit and amplifier；
The input terminal of the current signal converting unit is electrically connected with setting electric current output end, is used for the setting electric current by electricity
Stream signal is converted to voltage signal, and output end is electrically connected with the input terminal of the amplifier, for being converted into voltage signal
Setting electric current amplifies processing；The output end of the amplifier is electrically connected with the comparison module, and being used for will be after enhanced processing
The setting electric current be transmitted to the comparison module.
9. the control system of UV LED light source according to claim 1, which is characterized in that further include: voltage
Acquisition module is electrically connected with the UVLED light source module, for acquiring the operating voltage of the UVLED light source；And with it is described
PWM module electrical connection, for the operating voltage to be transmitted to the PWM module；The PWM module is also used to according to the work
Make voltage the PWM drive signal is adjusted.
10. the control system of UV LED light source according to claim 9, which is characterized in that the voltage is adopted
Collecting module includes: third sampling resistor, slide rheostat and the 4th sampling resistor；
The first end of the third sampling resistor is electrically connected with the first end of the UVLED light source, and second end and the sliding become
Hinder the first end electrical connection of device；The second end of the slide rheostat respectively with the control terminal of the slide rheostat, the PWM
The electrical connection of the first end of the feedback end of module and the 4th sampling resistor；
The second end of 4th sampling resistor connects ground terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810758295.7A CN108966416B (en) | 2018-07-11 | 2018-07-11 | Control system of ultraviolet light-emitting diode light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810758295.7A CN108966416B (en) | 2018-07-11 | 2018-07-11 | Control system of ultraviolet light-emitting diode light source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108966416A true CN108966416A (en) | 2018-12-07 |
| CN108966416B CN108966416B (en) | 2021-01-08 |
Family
ID=64482910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810758295.7A Active CN108966416B (en) | 2018-07-11 | 2018-07-11 | Control system of ultraviolet light-emitting diode light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108966416B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119300207A (en) * | 2024-12-12 | 2025-01-10 | 杭州海康机器人股份有限公司 | Light source driving circuit and light source system |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102083249A (en) * | 2009-11-30 | 2011-06-01 | 康佳集团股份有限公司 | LED (light-emitting diode) lighting circuit |
| CN103037597A (en) * | 2013-01-06 | 2013-04-10 | 深圳创维－Rgb电子有限公司 | Multi-channel LED (Light Emitting Diode) constant current control circuit and LED light source control system |
| CN103179717A (en) * | 2011-12-20 | 2013-06-26 | 海洋王照明科技股份有限公司 | LED (light emitting diode) dimming control circuit and LED lighting |
| CN203057591U (en) * | 2012-10-22 | 2013-07-10 | 江南大学 | A green intelligent digital control LED drive power supply |
| CN103607810A (en) * | 2013-10-31 | 2014-02-26 | 汤志新 | Control circuit of LED lighting equipment |
| CN203761633U (en) * | 2013-12-28 | 2014-08-06 | 深圳市法马新智能设备有限公司 | Energy-saving LED traffic light with long service life |
| CN104640269A (en) * | 2013-11-08 | 2015-05-20 | 苏州璨宇光学有限公司 | Light source device |
| CN205726521U (en) * | 2016-04-13 | 2016-11-23 | 佛山市华永泰光电科技有限公司 | A kind of support controllable silicon light modulation LED drive circuit |
| CN206442563U (en) * | 2017-02-22 | 2017-08-25 | 重庆理工大学 | A kind of LED lamp drive circuit |
| CN107567134A (en) * | 2017-09-06 | 2018-01-09 | 天津津航技术物理研究所 | High power light source dimming control system and method based on PWM |
| CN107995721A (en) * | 2017-10-30 | 2018-05-04 | 厦门亚锝电子科技有限公司 | DALI adjusting control circuits |
-
2018
- 2018-07-11 CN CN201810758295.7A patent/CN108966416B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102083249A (en) * | 2009-11-30 | 2011-06-01 | 康佳集团股份有限公司 | LED (light-emitting diode) lighting circuit |
| CN103179717A (en) * | 2011-12-20 | 2013-06-26 | 海洋王照明科技股份有限公司 | LED (light emitting diode) dimming control circuit and LED lighting |
| CN203057591U (en) * | 2012-10-22 | 2013-07-10 | 江南大学 | A green intelligent digital control LED drive power supply |
| CN103037597A (en) * | 2013-01-06 | 2013-04-10 | 深圳创维－Rgb电子有限公司 | Multi-channel LED (Light Emitting Diode) constant current control circuit and LED light source control system |
| CN103607810A (en) * | 2013-10-31 | 2014-02-26 | 汤志新 | Control circuit of LED lighting equipment |
| CN104640269A (en) * | 2013-11-08 | 2015-05-20 | 苏州璨宇光学有限公司 | Light source device |
| CN203761633U (en) * | 2013-12-28 | 2014-08-06 | 深圳市法马新智能设备有限公司 | Energy-saving LED traffic light with long service life |
| CN205726521U (en) * | 2016-04-13 | 2016-11-23 | 佛山市华永泰光电科技有限公司 | A kind of support controllable silicon light modulation LED drive circuit |
| CN206442563U (en) * | 2017-02-22 | 2017-08-25 | 重庆理工大学 | A kind of LED lamp drive circuit |
| CN107567134A (en) * | 2017-09-06 | 2018-01-09 | 天津津航技术物理研究所 | High power light source dimming control system and method based on PWM |
| CN107995721A (en) * | 2017-10-30 | 2018-05-04 | 厦门亚锝电子科技有限公司 | DALI adjusting control circuits |
Non-Patent Citations (1)
| Title |
|---|
| 方佩敏: "《电子制作 2005合订本 下》", 31 December 2015, 电子制作杂志社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119300207A (en) * | 2024-12-12 | 2025-01-10 | 杭州海康机器人股份有限公司 | Light source driving circuit and light source system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108966416B (en) | 2021-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10231307B2 (en) | Load current control circuit | |
| US9179514B2 (en) | Control circuit for reducing of total harmonic distortion (THD) in the power supply to an electric load | |
| CN104010415B (en) | Load current method of adjustment and circuit and the Switching Power Supply with this circuit | |
| DE202007019355U1 (en) | Inverter unit | |
| CN108306492A (en) | A kind of adaptive output current removes ripple circuit and its goes ripple method | |
| CN102223742A (en) | Light-emitting diode (LED) dimming circuit and method | |
| CN106535391B (en) | Peak current absorbing circuit and its control method and light emitting diode drive device | |
| CN102832818A (en) | Constant-voltage power circuit based on single chip processor and constant-voltage power supply device | |
| CN109757012A (en) | A kind of LED lamp adaptive adjustment constant power control method | |
| CN108966416A (en) | A kind of control system of UV LED light source | |
| KR102204955B1 (en) | Solar power unit having the function of anti-Potential Induced Degradation | |
| CN107863687A (en) | A kind of high-precision laser remote sensing numerical control electric power system and control method | |
| CN102791055A (en) | Constant light of switch power supply maintaining lamp and with power feedback | |
| CN214663825U (en) | Plant lighting device | |
| US20200375003A1 (en) | Linear constant-current led drive circuit adaptive to wide voltage range | |
| US20140340615A1 (en) | Driving circuit of light emitting element, and light emitting device and electronic apparatus including the light emitting element | |
| EP3105993B1 (en) | Lighting system comprising a protection circuit, and corresponding method for protecting light sources from electrostatic discharges | |
| CN203193958U (en) | Constant voltage dimmable LED power supply | |
| CN109862292A (en) | A constant current control circuit and TV set | |
| CN208113025U (en) | It is a kind of to follow dimming device for tunable optical lamps and lanterns | |
| CN108712801A (en) | A kind of the Constant-power drive circuit and device of wide input voltage | |
| CN104904316B (en) | Method and system for closing light-emitting device | |
| CN106488614B (en) | A kind of driver and a kind of method of supplying power to | |
| CN209462649U (en) | It is a kind of for driving the circuit with fast current protection and current regulation function at a slow speed of LED light | |
| CN116321575A (en) | Control circuit, LED driving system and over-power protection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |