CN107318194B - Lighting system of backlight module - Google Patents
Lighting system of backlight module Download PDFInfo
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- CN107318194B CN107318194B CN201710581690.8A CN201710581690A CN107318194B CN 107318194 B CN107318194 B CN 107318194B CN 201710581690 A CN201710581690 A CN 201710581690A CN 107318194 B CN107318194 B CN 107318194B
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- plc controller
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- 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]
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- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
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- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/16—Controlling the light source by timing means
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a backlight module lighting system, which comprises a PLC controller, a touch screen, a direct current power supply, N photoelectric switches, M relays, a constant voltage source, N constant current output circuit units and a photoelectric alarm circuit unit, wherein the power end of the PLC controller is connected to 220V mains supply, the direct current power supply supplies power to the N photoelectric switches, the signal output end of the N photoelectric switches is connected with the input end of the PLC controller, the first control terminal of each relay is connected with the output end of the PLC controller, the second control terminal of each relay is connected with the direct current power supply, the constant voltage source is connected with the static contacts of the M relays, the input end of the N constant current output circuit units is connected with the normally open contacts of the N relays, and the photoelectric alarm circuit unit is connected with the normally open contacts of the one relay, wherein M is more than N, N is more than 2, and M and N is an integer so as to realize the functions of quick reading lighting and interval prompting of hand washing.
Description
Technical Field
The invention relates to the technical field of backlight module testing matched with LEDs, in particular to a backlight module lighting system for lighting FPC on a production line.
Background
Because the LED lamp strip has the advantages of increasing the luminous surface, eliminating glare, sublimating visual effect, eliminating visual fatigue and the like, the backlight module matched with the LED lamp strip has the characteristics of high brightness, long service life, uniform light emission and the like, is widely used in the liquid crystal industry at present, along with the continuous development of liquid crystal display technology, the yield of the backlight module is in the market stage of unsatisfactory production, FPC (flexible printed Circuit) is required to be lighted for many times in the production of the backlight module, lighting systems in the industry at present are all in the traditional key-type lighting systems, the lighting current is unstable, time is wasted in the lighting process, and the like cannot play a role in safe production.
Disclosure of Invention
The invention aims to solve the technical problems that: the existing backlight module has the problems of complex lighting procedures, unstable lighting voltage, time waste in the lighting process, incapacity of playing a role of safe production and the like, and corresponding lighting systems are manufactured, and lighting circuits, lighting switches and the like are designed.
In order to solve the problems, the invention adopts the following technical scheme: the utility model provides a backlight unit lighting system, includes a PLC controller, a DC power supply, N photoelectric switch, M relay, a constant voltage source, N constant current output circuit unit and a photoelectric alarm circuit unit, the power end of PLC controller is connected to 220V commercial power, DC power supply is connected and supplies power with the power end of N photoelectric switch, the ground terminal of N photoelectric switch is connected with the COM end of PLC controller, the signal output part of N photoelectric switch is connected with the input of PLC controller, the first control terminal of every relay is connected with the output of PLC controller, the second control terminal of every relay is connected with DC power supply, the constant voltage source is connected with the stationary contact of M relay, the input of N constant current output circuit unit is connected with the normally open contact of N relay, N photoelectric alarm circuit unit is equipped as output constant current and supplies backlight unit, the normally open contact of N+1st relay is connected, the first control terminal of every relay is connected with the output terminal of PLC controller, the second control terminal of every relay is connected with DC power supply, the stationary contact of M relay is connected, N constant current output circuit is more than N, N is more than N, the alarm circuit is more than M, and the operator's of washing one's hand, the lamp is more than 2.
Further, the constant current output circuit unit comprises a first resistor unit, a second resistor unit, a voltage stabilizing tube, a triode and a power interface, one end of the first resistor unit is connected with a normally open contact and the power interface of a relay, the other end of the first resistor unit is connected with a base electrode of the triode, a negative electrode of the voltage stabilizing tube is connected with the base electrode of the triode, a collector electrode of the triode is connected with the power interface, an emitter electrode of the triode is connected with one end of the second resistor unit, and a second end of the second resistor unit is connected with an anode of the voltage stabilizing tube and grounded. The constant voltage source distributes voltage to each constant current output circuit unit, lighting current of the constant current output circuit units is controlled to be 80 milliamperes, and the power interface is connected with the FPC (flexible printed circuit) point socket of the backlight module, so that risk of burning the FPC due to overlarge current can be reduced.
Further, the device comprises a frequency converter and a motor, wherein the frequency converter drives the motor to rotate, the power input end of the frequency converter is connected with the normally open contact of the (N+2) th relay, and M is larger than N+1, and M and N are integers. The motor is used for adjusting the rotating speed of the conveying belt.
Further, the emergency stop switch is characterized by comprising an emergency stop switch, one end of the emergency stop switch is connected with the COM end of the PLC, and the other end of the emergency stop switch is connected with the disabling end of the PLC. When the scram switch works, the disabling end is used for scram.
Compared with the prior art, the invention has the beneficial effects that: according to the PLC controller setting the lighting delay time required by the FPC lighting, the FPC is lightened by touching the photoelectric switch 3 (photoelectric sensor) by hand, the FPC is lightened by time delay, the output end of the PLC control is low in potential, the relay 4 is correspondingly conducted, the constant current output circuit unit works, the lighting current is output, the output lighting current can be adjusted by adjusting the resistance, and compared with the traditional push switch, the single-chip lighting or extinguishing time is saved by about 1.5 seconds.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a circuit diagram showing a specific embodiment of the constant current output circuit unit in the present invention;
fig. 3 is a circuit diagram showing a specific embodiment of the photoelectric alarm circuit unit in the present invention.
In the figure, a PLC controller 1, a dc power supply 2, a photoelectric switch 3, and a relay 4.
Detailed Description
In order to make the contents of the present invention more apparent, a detailed description of the present invention will be given below with reference to the accompanying drawings. It should be noted that the illustration and description of the components known to those skilled in the art, which are not related to the present invention, have been omitted in the drawings and description for the sake of clarity.
Embodiment 1 referring to fig. 1, a lighting system of a backlight module comprises a PLC controller 1, a dc power supply 2, N photoelectric switches 3, M relays 4, a constant voltage source, N constant current output circuit units and a photoelectric alarm circuit unit, wherein the power supply end of the PLC controller 1 is connected to 220V mains supply, the dc power supply 2 is connected with the power supply end of the N photoelectric switches 3 and supplies power, the ground end of the N photoelectric switches 3 is connected with the COM end of the PLC controller 1, the signal output end of the N photoelectric switches 3 is connected with the input end of the PLC controller 1, the first control terminal of each relay 4 is connected with the output end of the PLC controller 1, the second control terminal of each relay 4 is connected with the dc power supply 2, the constant voltage source is connected with the static contacts of the M relays 4, the input end of the N constant current output circuit units is connected with the normally open contacts of the N relays 4, the N constant current output circuit units are equipped as a backlight FPC, the signal output end of the N photoelectric switches is connected with the M alarm circuit, and the N alarm circuit is an integer number of N alarm circuit, and the N alarm circuit is connected with the N alarm unit is more than M, and the operator is in a hand washing mode. Preferably, the system further comprises a touch screen, wherein the touch screen is connected with the data end of the PLC controller and is used for the PLC controller to transmit instructions and receive state data of each port of the PLC controller.
In a specific application, the preferred model of the PLC controller 1 is Mitsubishi FX2N-48MT-001, and the Mitsubishi FX2N-48MT-001 is provided with 48-point input and output transistors, and controls the scale: 16 to 256 points; the RAM memory with 8K capacity is built in, and the maximum expansion can be realized to 16K; CPU operation processing speed 0.08 mu S/basic instruction; an input/output expansion module and a special function module can be connected to the right side of FX2N series; the basic unit is internally provided with a 2-axis independent maximum 20kHz positioning function (transistor output type). The direct current power supply 2 is a 24V direct current power supply 2, and can take electricity to be 24V direct current output by Mitsubishi FX2N-48MT-001, the photoelectric switch 3 adopts NPN type, preferably the model is E348-D03NK, 18 photoelectric switches 3 are adopted, namely N is equal to 18, the signal ends of the 18 photoelectric switches 3 are connected with the input end (X1-X22) of the PLC controller 1 of the model Mitsubishi FX2N-48MT-001, the direct current power supply 2 is connected with and supplies electricity to the power ends of the 18 photoelectric switches 3, the grounding end of the 18 photoelectric switches 3 is connected with the COM end of the PLC controller 1, the voltage of the COM end of the PLC controller 1 is 0V, and the power end of the PLC controller 1 of the model Mitsubishi FX2N-48MT-001 is supplied with 220V mains supply, so that the power end of the PLC controller 1 is connected to 220V mains supply through the power switch S2 for controlling the on-off of the power supply.
The output end (Y0-Y24) of the PLC controller 1 with the model Mitsubishi FX2N-48MT-001 is connected with a first control terminal of 21 relays 4 (J1-J21), a second control terminal of the 21 relays 4 is connected with a 24V direct current power supply 2, the preferred model of the constant voltage source is KXN-6005D0-60V5A model, the constant voltage is 60V, 21 interfaces are arranged and are connected with stationary contacts of the 21 relays 4, the number of the constant current output circuit units is 18, the input ends of the constant current output circuit units are connected with normally open contacts of the 18 relays 4, the 18 constant current output circuit units are configured to output constant current for the lighting of a backlight module FPC, three relays 4 are ready for use, the photoelectric alarm circuit units are connected with normally open contacts of the 19 th relay 4, and the photoelectric alarm circuit units are configured to remind operators of hand washing in a luminous mode; two relays 4 remain ready for use.
In order to suspend the system operation in an emergency, an emergency stop switch S1 is further arranged, one end of the emergency stop switch S1 is connected with the COM end of the PLC, and the other end of the emergency stop switch S1 is connected with the disabling end of the PLC. For the PLC controller of the model Mitsubishi FX2N-48MT-001, the disabling end can be realized by calling a subprogram, in fig. 1, the disabling end of the PLC controller is an XO end, the scram switch S1 is a normally open switch, when the system works normally, the disabling end is in a null connection state, when the scram switch is closed, the disabling end is connected with 0V voltage, and then the system pauses to operate.
According to the technical scheme, the intelligent control device further comprises a frequency converter and a motor, the frequency converter drives the motor to rotate, the power input end of the frequency converter is connected with the normally open contact of the (N+2) th relay, and M is larger than N+1, and M and N are integers. M gets 21, N gets 18, and the power input of converter is connected with the normally open contact of 20 th relay 4, and the preferential model of converter is FR-D740-1.5K-CHT, can drive motor rotation, the motor is used for driving the conveyer belt of assembly line, adjusts the rotational speed of motor through the converter to stabilize the belt rotational speed of assembly line.
On the basis of the above technical scheme, referring to fig. 2, the constant current output circuit unit includes a first resistor unit, a second resistor unit, a voltage stabilizing tube D1, a triode Q1 and a power interface, one end of the first resistor unit is connected with a normally open contact of a relay 4 and the power interface, the other end of the first resistor unit is connected with a base of the triode Q1, a negative electrode of the voltage stabilizing tube D1 is connected with the base of the triode Q1, a collector of the triode Q1 is connected with the power interface, an emitter of the triode Q1 is connected with one end of the second resistor unit, a second end of the second resistor unit is connected with an anode of the voltage stabilizing tube D1 and grounded, further, the first resistor unit is formed by connecting a resistor R1 and a resistor R2 in parallel, the second resistor unit is formed by connecting a resistor R3 and a resistor R4 in parallel, and in order to regulate the output current, and the second resistor unit is formed by connecting an adjustable resistor R8 in series after connecting the resistor R3 and the resistor R4 in parallel. The constant voltage source distributes voltage to each constant current output circuit unit, lighting current of the constant current output circuit units is controlled to be 80 milliamperes, and the power interface is connected with the FPC (flexible printed circuit) point socket of the backlight module, so that risk of burning the FPC due to overlarge current can be reduced.
On the basis of the technical scheme, referring to fig. 3, the photoelectric alarm circuit unit comprises an operation lamp, an alarm lamp and an alarm bell, one end of the operation lamp is connected with a normally closed contact of one relay 4, the other end of the operation lamp is grounded, the alarm lamp is connected with the alarm bell in parallel, one public end of the alarm lamp is connected with a normally open contact of the relay 4, and the other public end of the alarm lamp is grounded. Under normal conditions, the running lamp is normally on, the photoelectric alarm circuit unit is displayed to work, the PLC controller 1 sets a specific time interval to control the relay 4 to be conducted, the alarm lamp and the alarm bell work, the alarm lamp is a red lamp, the production line is reminded to clean gloves according to a certain frequency, dust transfer is reduced, and the environment is polluted.
Working principle: according to the PLC controller setting the lighting delay time required by the FPC lighting, the FPC is lightened by touching the photoelectric switch 3 (photoelectric sensor) by hand, the FPC is lightened by time delay, the output end of the PLC control is low in potential, the relay 4 is correspondingly conducted, the constant current output circuit unit works, the lighting current is output, the output lighting current can be adjusted by adjusting the resistance, and compared with the traditional push switch, the single-chip lighting or extinguishing time is saved by about 1.5 seconds.
Finally, it should be noted that: the above embodiments are intended to illustrate the present invention, not to limit the present invention, and those skilled in the art may still make modifications to the technical solutions set forth in the examples, and any modifications and alterations made to the present invention should also be considered as the scope of the present invention.
Claims (8)
1. The utility model provides a backlight unit lighting system, its characterized in that includes a PLC controller, a DC power supply, N photoelectric switch, M relay, a constant voltage source, N constant current output circuit unit and a photoelectric alarm circuit unit, the power end of PLC controller is connected to 220V commercial power, DC power supply is connected and supplies power with the power end of N photoelectric switch, the ground terminal of N photoelectric switch is connected with the COM end of PLC controller, the signal output part of N photoelectric switch is connected with the input of PLC controller, the first control terminal of every relay is connected with the output of PLC controller, the second control terminal of every relay is connected with DC power supply, the constant voltage source is connected with the static contact of M relay, the input of N constant current output circuit unit is connected with the normally open contact of N relay, N constant current output circuit unit is equipped as output constant current for supplying power, the photoelectric alarm circuit unit is connected with the COM end of N+1th relay, the signal output terminal of N photoelectric switch is connected with the output terminal of PLC controller, M is equipped with the alarm circuit that N is more than N, and N is more than N, wherein, the operator's is more than N, and the alarm circuit is more than 2.
2. The backlight module lighting system of claim 1, wherein the constant current output circuit unit comprises a first resistor unit, a second resistor unit, a voltage stabilizing tube, a triode and a power interface, one end of the first resistor unit is connected with a normally open contact of a relay and the power interface, the other end of the first resistor unit is connected with a base electrode of the triode, a negative electrode of the voltage stabilizing tube is connected with the base electrode of the triode, a collector electrode of the triode is connected with the power interface, an emitter electrode of the triode is connected with one end of the second resistor unit, and a second end of the second resistor unit is connected with an anode of the voltage stabilizing tube and grounded.
3. The lighting system of claim 2, wherein the first resistor unit is formed by connecting a resistor R1 and a resistor R2 in parallel, and the second resistor unit is formed by connecting a resistor R3 and a resistor R4 in parallel and then connecting an adjustable resistor R8 in series.
4. The backlight module lighting system of claim 1, wherein the photoelectric alarm circuit unit comprises an operation lamp, an alarm lamp and an alarm bell, one end of the operation lamp is connected with a normally closed contact of a relay, the other end of the operation lamp is grounded, the alarm lamp is connected with the alarm bell in parallel, one connecting end of the alarm lamp is connected with a normally open contact of the relay, and the other connecting end of the alarm lamp is grounded.
5. The backlight module lighting system of claim 1, comprising a frequency converter and a motor, wherein the frequency converter drives the motor to rotate, and a power input end of the frequency converter is connected with a normally open contact of an n+2th relay, wherein M is greater than n+1, and M and N are integers.
6. The backlight module lighting system of claim 1, comprising a touch screen, wherein the touch screen is connected to the data terminal of the PLC controller and is in data communication with the data terminal.
7. A backlight module lighting system as set forth in any one of claims 1-4, comprising a power switch, wherein the power terminal of the PLC controller is connected to 220V mains via the power switch.
8. A backlight module lighting system as set forth in any one of claims 1-4, comprising a scram switch, wherein one end of the scram switch is connected to the COM end of the PLC controller, and the other end of the scram switch is connected to the disable end of the PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710581690.8A CN107318194B (en) | 2017-07-17 | 2017-07-17 | Lighting system of backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710581690.8A CN107318194B (en) | 2017-07-17 | 2017-07-17 | Lighting system of backlight module |
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| CN107318194A CN107318194A (en) | 2017-11-03 |
| CN107318194B true CN107318194B (en) | 2023-05-26 |
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| CN201710581690.8A Active CN107318194B (en) | 2017-07-17 | 2017-07-17 | Lighting system of backlight module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111787657A (en) * | 2020-08-05 | 2020-10-16 | 安徽江淮汽车集团股份有限公司 | Backlight protection circuit, device and automobile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215913A (en) * | 2014-08-07 | 2014-12-17 | 国家电网公司 | Analogue grounding tester used for direct-current power |
| JP2015056240A (en) * | 2013-09-11 | 2015-03-23 | 岩崎電気株式会社 | Flash discharge lamp lighting device and flash irradiation device |
| CN206948671U (en) * | 2017-07-17 | 2018-01-30 | 南京中电熊猫照明有限公司 | A kind of backlight module lighting system |
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2017
- 2017-07-17 CN CN201710581690.8A patent/CN107318194B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015056240A (en) * | 2013-09-11 | 2015-03-23 | 岩崎電気株式会社 | Flash discharge lamp lighting device and flash irradiation device |
| CN104215913A (en) * | 2014-08-07 | 2014-12-17 | 国家电网公司 | Analogue grounding tester used for direct-current power |
| CN206948671U (en) * | 2017-07-17 | 2018-01-30 | 南京中电熊猫照明有限公司 | A kind of backlight module lighting system |
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| CN107318194A (en) | 2017-11-03 |
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