CN207022256U - A kind of matrix LED drive circuit of indicator - Google Patents
A kind of matrix LED drive circuit of indicator Download PDFInfo
- Publication number
- CN207022256U CN207022256U CN201720865918.1U CN201720865918U CN207022256U CN 207022256 U CN207022256 U CN 207022256U CN 201720865918 U CN201720865918 U CN 201720865918U CN 207022256 U CN207022256 U CN 207022256U
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- Prior art keywords
- triode
- control circuit
- matrix
- led light
- row
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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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Abstract
The utility model provides a kind of matrix LED drive circuit of indicator, including n row control circuit and n line control circuit, single-chip microcomputer connects the anode of a row LED light in LED light matrix by the row control circuit respectively, for providing anode voltage to the row LED light, single-chip microcomputer connects the negative electrode of a line LED light in LED light matrix by the line control circuit respectively, for providing cathode voltage to the row LED light；The LED light matrix is made up of n*n semiconductor light-emitting-diode, and the anode of each semiconductor light-emitting-diode is correspondingly connected to a row control circuit, and the negative electrode of each semiconductor light-emitting-diode is correspondingly connected to a line control circuit.
Description
Technical field
A kind of LED light drive circuit is the utility model is related to, specifically, relate to a kind of matrix LED instruction
Lamp drive circuit.
Background technology
The more single-chip microcomputer price of in the market pin is general all fewer than pin expensive, needs to be compared with pin some
Few single-chip microcomputer controls the occasion of a large amount of LED lights, and being typically necessary, which increases extra port, latches or scan chip, increase
Chip, it is meant that the increase of production cost, can circuit reliability reduction.
In order to solve the problem present on, people are seeking a kind of preferable technical solution always.
The content of the invention
The purpose of this utility model is in view of the shortcomings of the prior art, so as to provide a kind of design science, practical, raw
Produce the low matrix LED drive circuit of indicator of cost.
To achieve these goals, technical scheme is used by the utility model：A kind of matrix LED indicator lamp driving
Circuit, including n row control circuit and n line control circuit, single-chip microcomputer connect LED by the row control circuit and indicated respectively
The anode of a row LED light in lamp matrix, for providing anode voltage to the row LED light, single-chip microcomputer passes through the row
Control circuit connects the negative electrode of a line LED light in LED light matrix respectively, cloudy for being provided to the row LED light
Pole tension.
Based on above-mentioned, the LED light matrix is made up of n*n semiconductor light-emitting-diode, each semiconductor light emitting
The anode of diode is correspondingly connected to a row control circuit, and the negative electrode of each semiconductor light-emitting-diode is correspondingly connected to one
Line control circuit.
Based on above-mentioned, the row control circuit includes the first triode, the first current-limiting resistance, the second current-limiting resistance and pull-up
Resistance, the single-chip microcomputer connect the base stage of first triode by first current-limiting resistance, first triode
Base stage also connects supply voltage by second current-limiting resistance, and the supply voltage connects described the by the pull-up resistor
The colelctor electrode of one triode, the emitter stage of first triode connect the anode of the semiconductor light-emitting-diode.
Based on above-mentioned, the line control circuit includes the second triode and 3rd resistor, and the single-chip microcomputer passes through described
Three resistance connect the base stage of second triode, and the colelctor electrode of second triode connects the semiconductor light-emitting-diode
Negative electrode, the grounded emitter of second triode.
The utility model has substantive distinguishing features and progress compared with the prior art, and specifically, the utility model passes through big
Amount triode and resistance construct matrix LED drive circuit of indicator, pass through fewer one-chip machine port during use
A large amount of LED lights are controlled, avoiding increases extra chip, reduces production cost, has design science, practical
Advantage.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
A kind of matrix LED drive circuit of indicator, it is therefore intended that LED instructions are driven by fewer one-chip machine port
Lamp matrix.As shown in figure 1, the LED light matrix is made up of 4*4 semiconductor light-emitting-diode in parallel, 16 half are led
Body light emitting diode is followed successively by LED1-LED16, and the single-chip microcomputer shares 8 output ports, respectively LEDY1, LEDY2,
LEDY3、LEDY4、LEDX1、LEDX1、LEDX1、LEDX1、LEDX1。
The matrix LED drive circuit of indicator includes 4 row control circuits and 4 line control circuits, the monolithic
Machine connects the anode of 4 row LED lights of the LED light matrix by 4 row control circuits respectively, and the single-chip microcomputer leads to
Cross the negative electrode that 4 line control circuits connect 4 row LED lights of the LED light matrix respectively.
Specifically, anode one row control circuit of corresponding connection of each semiconductor light-emitting-diode, each semiconductor hair
The negative electrode of optical diode one line control circuit of corresponding connection；The single-chip microcomputer is by the row control circuit to the semiconductor
Light emitting diode provides anode voltage, and the single-chip microcomputer is provided by the line control circuit to the semiconductor light-emitting-diode
Cathode voltage, when the anode voltage of the semiconductor light-emitting-diode is more than cathode voltage, the light emitting diode can be sent out
Light is indicated.
Specifically, PNP type triode Q1, resistance R1, resistance R2, resistance R9 and+5V supply voltages composition first row control
Circuit, the LEDY1 ports of the single-chip microcomputer are realized to LED matrix first row LED light by the first row control circuit
Control.Wherein, the resistance R1 is pull-up resistor, and the resistance R9 is the first current-limiting resistance, and the resistance R2 is the second limit
Leakage resistance, the PNP type triode Q1 are the first triode；When the LEDY1 ports of the single-chip microcomputer are driven by the resistance R9
When moving the PNP type triode Q1, the current-limiting resistance R2 can be limited the electric current by the PNP type triode Q1
Stream, avoids electric current excessive and damages the PNP type triode Q1 or LED light emitting diodes, the resistance R1 may insure
There is no PNP type triode Q1 during effective drive signal to be not turned on.
PNP type triode Q2 and resistance R3, resistance R4, resistance R10 and+5V supply voltages composition secondary series control circuit,
PNP type triode Q3 and resistance R5, resistance R6, resistance R11 and+5V supply voltages form the 3rd row control circuit and positive-negative-positive three
Pole pipe Q4 and resistance R7, resistance R8, resistance R12 and+5V supply voltages form the 4th row control circuit, the single-chip microcomputer
The control to LED matrix secondary series LED light, the single-chip microcomputer are realized by the secondary series control circuit in LEDY2 ports
LEDY3 ports pass through the 3rd row control circuit and realize control to the row LED light of LED matrix the 3rd, the monolithic
The control to the row LED light of LED matrix the 4th is realized by the 4th row control circuit in the LEDY4 ports of machine.
Specifically, NPN type triode Q5 and resistance R13 forms the first line control circuit, wherein, the resistance R13 is limited
Leakage resistance, the NPN type triode Q5 are the second triode.The LEDX1 ports of the single-chip microcomputer are driven by the resistance R13
The NPN type triode Q5, realizes the control to LED matrix the first row LED light；
NPN type triode Q6 and resistance R14 forms the second line control circuit, wherein, the resistance R14 is current-limiting resistance,
The NPN type triode Q6 is the second triode.The LEDX2 ports of the single-chip microcomputer drive the NPN by the resistance R14
Type triode Q6, realize the control to LED matrix the second row LED light.
NPN type triode Q7 and resistance R15 form the third line control circuit, wherein, the resistance R15 is current-limiting resistance,
The NPN type triode Q7 is the second triode.The LEDX3 ports of the single-chip microcomputer drive the NPN by the resistance R15
Type triode Q7, realizes the control to LED matrix the third line LED light.
NPN type triode Q8 and resistance R16 composition fourth line control circuits, wherein, the resistance R16 is current-limiting resistance,
The NPN type triode Q8 is the second triode.The LEDX4 ports of the single-chip microcomputer drive the NPN by the resistance R16
Type triode Q8, realizes the control to LED matrix fourth line LED light.
By the combination of different line control circuits and row control circuit, the control of the light on and off of different LED lights is realized
System, for example, the LEDY1 ports of the monolithic export effective low level signal, the effectively high electricity of LEDX1 ports output of the monolithic
Ordinary mail number can light LED1；The LEDY3 ports of the monolithic export effective low level signal, the LEDX2 ports of the monolithic
LED7 can be lighted by exporting effective high level signal.
Finally it should be noted that:Above example is only illustrating the technical solution of the utility model rather than it is limited
System；Although the utility model is described in detail with reference to preferred embodiment, those of ordinary skill in the art should
Understand：Specific embodiment of the present utility model can still be modified or some technical characteristics are equally replaced
Change；Without departing from the spirit of technical solutions of the utility model, it all should cover in the claimed technical scheme of the utility model
Among scope.
Claims (4)
- A kind of 1. matrix LED drive circuit of indicator, it is characterised in that：Including n row control circuit and n row control electricity Road, single-chip microcomputer connect the anode of a row LED light in LED light matrix by the row control circuit respectively, for The row LED light provides anode voltage, and single-chip microcomputer connects a line in LED light matrix respectively by the line control circuit The negative electrode of LED light, for providing cathode voltage to the row LED light.
- 2. matrix LED drive circuit of indicator according to claim 1, it is characterised in that：The LED light matrix It is made up of n*n semiconductor light-emitting-diode, the anode of each semiconductor light-emitting-diode is correspondingly connected to a row control electricity Road, the negative electrode of each semiconductor light-emitting-diode are correspondingly connected to a line control circuit.
- 3. matrix LED drive circuit of indicator according to claim 2, it is characterised in that：The row control circuit bag The first triode, the first current-limiting resistance, the second current-limiting resistance and pull-up resistor are included, the single-chip microcomputer passes through first current limliting electricity Resistance connects the base stage of first triode, and the base stage of first triode is also connected by second current-limiting resistance powers Voltage, the supply voltage connect the colelctor electrode of first triode by the pull-up resistor, first triode Emitter stage connects the anode of the semiconductor light-emitting-diode.
- 4. the matrix LED drive circuit of indicator according to Claims 2 or 3, it is characterised in that：The line control circuit Including the second triode and 3rd resistor, the single-chip microcomputer connects the base stage of second triode by the 3rd resistor, The colelctor electrode of second triode connects the negative electrode of the semiconductor light-emitting-diode, and the emitter stage of second triode connects Ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720865918.1U CN207022256U (en) | 2017-07-17 | 2017-07-17 | A kind of matrix LED drive circuit of indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720865918.1U CN207022256U (en) | 2017-07-17 | 2017-07-17 | A kind of matrix LED drive circuit of indicator |
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| Publication Number | Publication Date |
|---|---|
| CN207022256U true CN207022256U (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720865918.1U Active CN207022256U (en) | 2017-07-17 | 2017-07-17 | A kind of matrix LED drive circuit of indicator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109389936A (en) * | 2018-12-13 | 2019-02-26 | 中科芯集成电路股份有限公司 | Matrix LED controls display device |
| CN110189685A (en) * | 2019-05-09 | 2019-08-30 | 深圳市创维群欣安防科技股份有限公司 | A kind of LED drive circuit, driving device and driving method |
| CN110211526A (en) * | 2018-12-07 | 2019-09-06 | 华帝股份有限公司 | LED matrix display and scanning driving method |
| CN110290612A (en) * | 2018-03-19 | 2019-09-27 | 无锡华润矽科微电子有限公司 | Matrix LED controling circuit structure |
| CN113516941A (en) * | 2021-06-22 | 2021-10-19 | 珠海格力电器股份有限公司 | LED matrix brightness control system and method |
-
2017
- 2017-07-17 CN CN201720865918.1U patent/CN207022256U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110290612A (en) * | 2018-03-19 | 2019-09-27 | 无锡华润矽科微电子有限公司 | Matrix LED controling circuit structure |
| CN110290612B (en) * | 2018-03-19 | 2021-08-27 | 华润微集成电路(无锡)有限公司 | Matrix type LED control circuit structure |
| CN110211526A (en) * | 2018-12-07 | 2019-09-06 | 华帝股份有限公司 | LED matrix display and scanning driving method |
| CN109389936A (en) * | 2018-12-13 | 2019-02-26 | 中科芯集成电路股份有限公司 | Matrix LED controls display device |
| CN110189685A (en) * | 2019-05-09 | 2019-08-30 | 深圳市创维群欣安防科技股份有限公司 | A kind of LED drive circuit, driving device and driving method |
| CN113516941A (en) * | 2021-06-22 | 2021-10-19 | 珠海格力电器股份有限公司 | LED matrix brightness control system and method |
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