CN205249524U - Area array UV -LED light source control system - Google Patents
Area array UV -LED light source control system Download PDFInfo
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- CN205249524U CN205249524U CN201520952145.1U CN201520952145U CN205249524U CN 205249524 U CN205249524 U CN 205249524U CN 201520952145 U CN201520952145 U CN 201520952145U CN 205249524 U CN205249524 U CN 205249524U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses an area array UV -LED light source control system, including power supply, oscillator unit, PWM adjust luminance unit, LED constant current drive unit, fault detection alarm unit and area array UV -LED light source, the unit is adjusted luminance through receiving different voltage signal or adjusting the duty cycle that different resistance values changes the pulse signal that is sent by the oscillator unit, again with here signal transmission for the LED constant current drive unit by PWM to the controller to change the energy value of area array light source. The utility model discloses the controllability of UV -LED light source energy. Make the UV -LED light source energy value of same platform equipment to carry out the full width face according to the process of difference (dry film, wet film, hinder weld etc. ) and adjust, and do not change the breadth homogeneity, satisfy a tractor serves several purposes. The fault detection alarm unit of this application motion fault lamp pearl and the position in can the automated inspection array, the useless board rate of PCB is reduced, convenient maintenance to real -time the warning.
Description
Technical field
The utility model relates to control field, concrete relates to a kind of face battle array UV-LED light-source control system.
Background technology
Exposure machine is in printed circuit board (pcb board) manufacture process, negative map is looked like to transfer to and cover on copper foil base materialSpecial equipment is the key equipment in PC board fabricating processes. Its principle is: first on substrate, apply one deck photosensitive material(as liquid photosensitive glue, dry film resist etc.), then see through film the photosensitive material being coated on base material are carried out to light spokePenetrate, its physicochemical properties are changed, the resin polymerization reaction take place of sensitization part is solidificated on base material and forms image, notThe resin of sensitization part does not have polymerization, under developer solution effect, dissolves, and realizes negative map is looked like to transfer to the object on base material. LightSource is the most important parts of exposure machine, and the uniformity of light source has determined the exposure quality of PCB; The swept area of light source has determinedThe maximum exposure area of PCB; The energy value of light source determines the length of time for exposure, thereby has determined the efficiency of exposure sources.
On market, the light source of existing exposure sources mostly is conventional light source (as high-pressure sodium lamp, metal halid lamp etc.). Its workPrinciple is to make its material luminescence by high pressure, has power consumption large. In addition, also have caloric value large, need huge cooling systemSystem; Lamp tube service life short (800H-1000H); Produce heavy metal and poisonous and harmful substance, injure health, cause environmental pollutionDeng shortcomings.
LED is semiconductor devices, and the life-span is grown (30000H-50000H), cold light source, do not produce toxic and harmful, power consumptionAmount accounts for 10% of Same Efficieney conventional light source. Along with the fast development of LED technology, its luminous efficiency and life-span constantly promote,Progressively replace traditional exposure machine light source. Meanwhile, the control drive circuit of LED light source also becomes an important subject.
2008, Chinese engineer set up research team, started the research of exposure machine UV-LED light source. In March, 2012, stateInterior first UV-LED exposure machine is born, and single lamp 800W, is equivalent to traditional mercury lamp 5KW. For the research and development of the UV-LED light source of China are openedOpened the beginning, after have successively many UV-LED exposure machines in succession to research and develop successfully. Exposure machine solidifies oil film needs larger light meritRate. The restriction of LED subject wafer heat radiation, it is too large that the power of single chip LED can not do, and current LED exposure machine light source is on the market equalBe the requirement that meets luminous power with plurality of LED composition array, its control mode is incorporated in illumination, the field LED light source such as backlightDriving method.
The LED light source that is applied to exposure machine is ultraviolet light, and the relative field such as illumination, has the light radiation uniformity, lamp pearl formerThe particular/special requirement of the aspects such as barrier detection, light modulation, its control circuit just has many deficiencies:
1) light source regulates large, the consuming time length of workload and can not ensure the uniformity of light source. For meeting different process pcb boardSolidifying requirements and the attenuation compensation of LED lamp pearl, whole LED light source light radiation will effectively regulate. Existing controlling partyOnly can the go the same way energy adjustment of series lamp pearl of formula. Array LED regulates, large, the consuming time length of workload, and can not ensure array lightThe uniformity of radiation.
2) existing control method lacks the detection to lamp pearl fault. In fields such as illuminations, minority LED lamp pearl fault causesImpact is little, and can find in time by human eye. In exposure machine, if lamp pearl is broken down, its column lamp pearl all will be notBe lit, have a strong impact on the uniformity of light source, and ultraviolet light is in visible-range, and human body is had to certain injury, againBe subject to the restriction of exposure machine structure, be difficult to find by human eye in time whether LED has fault, cause a large amount of useless plates.
Utility model content
The purpose of this utility model provides a kind of face battle array UV-LED light-source control system, in conjunction with microelectronics, control automaticallyIn one, energy of light source value can provide different analog voltage signals by host computer and regulate, and also can with computer programmingRegulated by simple peripheral circuit input voltage signal. Every group of LED lamp group also can independently be regulated by potentiometer.
For achieving the above object, the utility model adopts following technical scheme:
A kind of face battle array UV-LED light-source control system, is characterized in that comprising power supply, oscillator unit, PWM light modulationUnit, LED constant current driving unit, fault detect alarm unit and face battle array UV-LED light source,
The input of described PWM light modulation unit is connected to oscillator unit and obtains output, and the output of PWM light modulation unit connectsReceive the input of LED constant current driving unit;
Described LED constant current driving unit is powered by Switching Power Supply, and output is connected to UV-LED array, and electric current is through LEDAfter lamp group, get back to driver element and form loop.
In technique scheme, described LED light source is made up of some groups of LED lamp groups, and each group LED lamp group is by severalLED arranged in sequence composition.
In technique scheme, the LED in described each group LED lamp group connects successively.
In technique scheme, power supply input one end of each group LED lamp group is connected to constant-current driven module separatelyAn output, the each own fault detect alarm unit of each group LED lamp group.
In technique scheme, described fault detect is the current signal that detects every group of lamp group.
In technique scheme, the electric current flowing through in described each group LED lamp group or for different or for identical, separatelyIndependent non-interference.
In technique scheme, described PWM light modulation is provided with hand switch in unit, and described hand switch can be selectedSingle group energy adjustment or the array energy adjustment of LED light source.
In technique scheme, described single group energy adjustment mode is that potentiometer regulates.
In technique scheme, described array energy adjustment mode is to receive voltage signal or the outside that host computer providesThe voltage signal of circuit input.
Compared with prior art, the utility model has the advantage of:
By inputting certain magnitude of voltage, realize the adjusting of array UV-LED optical radiation energy, fast, simply, and almostDo not change the uniformity of light source. An equipment can meet the energy requirement of internal layer, also can be used as outer, welding resistance by adjusting energyExposure, realizes a tractor serves several purposes.
Design the fault detect alarm module duty of every group of lamp group of monitoring in real time, the information detecting has been putGreatly, judgement, transmission, and send alarm signal. Can carry out fault alarm timely to UV light source, more convenient maintenance personal is to eventDetermining of barrier point position, rapid-maintenance.
Brief description of the drawings
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is oscillator unit circuit theory diagrams;
Fig. 3 is PWM light modulation element circuit schematic diagram;
Fig. 4 is fault detection alarm element circuit schematic diagram.
Detailed description of the invention
As shown in Figure 1, be the general principle block diagram of face battle array UV-LED light-source control system. System is by power supply, vibrationDevice unit, PWM light modulation unit, LED constant current driving unit and fault detect alarm unit and UV-LED array composition. Oscillator listUnit produces the PWM square wave of certain frequency, certain amplitude, is transferred to PWM light modulation unit; PWM light modulation unit receives square waveAfter after model, processing, regulating, be transferred to LED constant current driving unit, the positive negative duty of PWM has single group to regulate (light source debuggingTime) and two kinds of mode controls of array adjusting (while changing mode of operation). LED constant current driving unit is supplied with according to the dutycycle of inputThe corresponding current value of LED array, realizes the control of energy of light source. Fault detect alarm unit is by the electric current feelings to each group of lamp groupCondition is carried out Real-Time Monitoring and judgement. Again fault message is exported to PLC or host computer, realized the warning of light source failure.
As shown in Figure 2,, be oscillator unit circuit theory diagrams. After switching on power, power supply VCC by R1 and R2 to capacitor CCharging, in the time of Uc<1/3VCC, oscillator output Vo=1, discharge tube cut-off. When after be charged to>=2/3VCC of Uc, oscillator outputVo is turned into 0, and now discharge tube conducting makes discharge end ground connection, and capacitor C is discharged over the ground by R2, and Uc is declined. When Uc drops toAfter 1/3VCC, oscillator output Vo is turned into again 1, so goes round and begins again, and is changed continuously to obtain oscillating impulse at output end voWaveform.
As shown in Figure 3, be PWM light modulation element circuit schematic diagram. 6,7 pin of NE555 are attempted by timing capacitor CT upper, 2Pin input pulse signal Vi. After switching on power, when 2 pin input high levels, DIS holds ground connection, and the voltage on CT is 0, and output Vo protectsHold is 0. In the time of input negative pulse, output is turned into Vo=1 immediately, and DIS holds open circuit, and power supply charges to CT by RT. Through one sectionAfter time, the voltage on CT rises to 2/3VCC, and output switching activity becomes Vo=0, and DIS holds ground connection, and the upper electric charge of CT is put into zero very soon. When 2When pin is inputted the pulse signal of certain frequency, 3 pin will be exported the square-wave signal of certain frequency. Its positive negative duty is by RT, CTDetermine.
RT in Fig. 3 is adjustable potentiometer, and RT, CT adopt duplicate supply mode, and select by single-pole double-throw switch (SPDT)Select. Can, by manually regulating respectively the dutycycle of each light modulation unit, also can realize the entirety of all light modulations unit dutycycleRegulate. The power supply mode of VDD has the various ways such as Power supply, analog output power supply. By shirtsleeve operation, realize energyAdjusting.
As shown in Figure 4, be fault detect alarm unit circuit theory diagrams. LED works in high-frequency pulse mode, utilizesElectromagnetic induction principle, when LED lamp group is normally worked, transformer HG generation current signal, triode U1 is in conducting state, time2 pin of base circuit C1 are inputted lower than 1/3VCC, 3 pin output high level, and green LED (run indicator D1) is in illuminating state.Eight input nand gate C2 input high levels, output low level, the output of alarm free signal. On the contrary, in the time having trouble light pearl, LED perseveranceThe electric current of stream driver element output can not form complete loops, and in this lamp group loop, electric current I is 0. The output of transformer no current, threeUtmost point pipe U1 cut-off, the 2 pin voltages of C1 are 1/2VCC, and 3 pin are output as low level, and LED light is extinguished, simultaneously that low level is defeatedEnter C2, C2 output high level sends alarm signal.
Every group of lamp group all has independently detection alarm circuit, occurring after abnormal alarm, and maintenance personal can be according to indicator lampAbnormal lamp pearl place group, rapidly removing faults are directly determined in position.
The each control module of the application's motion is basic digital circuit composition by NE555 time base circuit. Power supply isCommon Switching Power Supply on the market; LED constant current driving unit is taking existing LED driving power module on the market as basic engineering;Whole light-source control system production cost is low, stable performance.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all at thisAny amendment of doing within the spirit of utility model and principle, be equal to and replace and improvement etc., all should be included in the utility modelProtection domain within.
Claims (9)
1. a face battle array UV-LED light-source control system, is characterized in that comprising power supply, oscillator unit, PWM light modulation listUnit, LED constant current driving unit, fault detect alarm unit and face battle array UV-LED light source,
The input of described PWM light modulation unit is connected to oscillator unit and obtains output, and the output of PWM light modulation unit is connected toThe input of LED constant current driving unit;
Described LED constant current driving unit is powered by Switching Power Supply, and output is connected to UV-LED array, and electric current is through LED lamp groupAfter get back to driver element form loop.
2. a kind of face battle array UV-LED light-source control system according to claim 1, if it is characterized in that described LED light source byDry group LED lamp group composition, each group LED lamp group is made up of several LED arranged in sequences.
3. a kind of face battle array UV-LED light-source control system according to claim 2, is characterized in that described each group LED lampLED in group connects successively.
4. a kind of face battle array UV-LED light-source control system according to claim 3, is characterized in that each group LED lamp groupPower supply input one end is connected to an output of constant-current driven module separately, the each own fault inspection of each group LED lamp groupSurvey alarm unit.
5. a kind of face battle array UV-LED light-source control system according to claim 4, is characterized in that described fault detect isDetect the current signal of every group of lamp group.
6. according to any one face battle array UV-LED light-source control system described in claim 1,2,3,4, described in it is characterized in thatThe electric current flowing through in LED lamp group or for different or for identical, independent non-interference separately.
7. a kind of face battle array UV-LED light-source control system according to claim 1, is characterized in that described PWM light modulation unitIn be provided with hand switch, described hand switch or be single group energy adjustment of LED light source or be array energy adjustment.
8. a kind of face battle array UV-LED light-source control system according to claim 7, is characterized in that described single group energy tuneJoint mode is that potentiometer regulates.
9. a kind of face battle array UV-LED light-source control system according to claim 7, is characterized in that described array energy tuneJoint mode is the voltage signal that receives the voltage signal that provides of host computer or external circuit input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520952145.1U CN205249524U (en) | 2015-11-25 | 2015-11-25 | Area array UV -LED light source control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520952145.1U CN205249524U (en) | 2015-11-25 | 2015-11-25 | Area array UV -LED light source control system |
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| CN205249524U true CN205249524U (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520952145.1U Expired - Fee Related CN205249524U (en) | 2015-11-25 | 2015-11-25 | Area array UV -LED light source control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108382302A (en) * | 2018-04-17 | 2018-08-10 | 柳州钢铁股份有限公司 | Automobile safety alarm |
| CN108777894A (en) * | 2018-04-08 | 2018-11-09 | 广州大学 | A kind of UV-LED arrays curing light source driver and design method |
-
2015
- 2015-11-25 CN CN201520952145.1U patent/CN205249524U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108777894A (en) * | 2018-04-08 | 2018-11-09 | 广州大学 | A kind of UV-LED arrays curing light source driver and design method |
| CN108382302A (en) * | 2018-04-17 | 2018-08-10 | 柳州钢铁股份有限公司 | Automobile safety alarm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180508 Address after: 621700 Huafeng new village, Jiangyou City, Mianyang, Sichuan Province, No. 9 Patentee after: INSTITUTE OF MATERIALS, CHINA ACADEMY OF ENGINEERING PHYSICS Address before: 621700 De Sheng Nan Road, Jiangyou City, Mianyang, Sichuan Province, No. 87 Patentee before: SICHUAN JUNENG NUCLEAR TECHNOLOGY ENGINEERING Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160518 Termination date: 20211125 |