CN101090595B - Lamp drive device - Google Patents
Lamp drive device Download PDFInfo
- Publication number
- CN101090595B CN101090595B CN200610092688.6A CN200610092688A CN101090595B CN 101090595 B CN101090595 B CN 101090595B CN 200610092688 A CN200610092688 A CN 200610092688A CN 101090595 B CN101090595 B CN 101090595B
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- China
- Prior art keywords
- signal
- cresset
- drive circuit
- generator
- drive device
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Classifications
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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]
- H05B45/10—Controlling the intensity of the light
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Led Devices (AREA)
- Semiconductor Lasers (AREA)
Abstract
A lamp signal drive device includes a signal generator, a signal separation generator and at least one lamp signal drive circuit, in which, the signal generator generates a signal to be divided into at least one control signal by the signal separation generator to control the lamp signal drive circuit.
Description
Technical field
The present invention relates to lamp drive device, particularly relate to the staggered apparatus and method that drive cresset of single signal.
Background technology
In various electronic products, electronic product all can be expressed various state with cresset conventionally, can need the flicker cresset of varying number according to the characteristic of product, for control these flicker cressets bright, go out, just need to provide lamp drive device.
General common lamp drive device has following two kinds of ways, and the first (as shown in Figure 1) is light-emitting diode (light emit t ing diode; LED) flash signal is by central processing unit (centra1 processing unit; CPU) universal input output (GPIO) provides, and reaches by program and the inner timer of central processing unit (CPU) cycle ratio (duty cycle) and the cycle (period) of controlling flash signal.
The second (as shown in Figure 2) is the built-in LPG of central processing unit (CPU) (LED pulse generator; Light-emitting diode pulse generator) controller, on central processing unit (CPU), have some adjustable parameters, as: flicker (on/off), frequency (frequency), cycle ratio (duty cyc1e) etc., the flash signal of light-emitting diode (LED) can be provided by controller, decides length and the cycle of flash signal through the timer of IC interior.Produce the signal of two light-emitting diodes (LED) interlace flicker, general common method is to use two LPG, with the identical cycle, an one first rear LPG that starts respectively produces staggered signal, this mode shortcoming is: the multiplex LPG of (1) palpus, increases hardware complexity; The time interval of (2) two staggered signals is affected by LPG point start-up time, cannot accurately control.
Summary of the invention
Embodiments of the invention provide a kind of lamp drive device, comprise a signal generator, one signal separates generator and one first cresset drive circuit and one second cresset drive circuit, signal generator produces a signal, signal separates generator this signal is separated into one first control signal and one second control signal, this the first cresset drive circuit and this second cresset drive circuit are controlled by this first control signal and this second control signal respectively, wherein this first cresset drive circuit and this second cresset drive circuit respectively comprise a light source, and the light source of the light source of this first cresset drive circuit and this second cresset drive circuit is with identical cycle ratio flicker.Wherein, signal separates generator and comprises: a D flip-flop, comprise a data input pin, a clock trigger end, an output and a reversed-phase output, clock trigger end receives signal, the output signal of reversed-phase output is fed back to data input pin, and output and this first cresset drive circuit of reversed-phase output control and this second cresset drive circuit; Wherein, signal separates generator and comprises one first diode, and its anode and output couple, and its negative electrode and clock trigger end couple.
Another embodiment of the present invention provides a kind of lamp drive device, comprise a signal generator, one signal separates generator and one first cresset drive circuit and one second cresset drive circuit, signal generator produces a signal, signal separates generator and has a D flip-flop, and signal is separated into one first control signal and one second control signal, this the first cresset drive circuit and this second cresset drive circuit are controlled by this first control signal and this second control signal respectively, wherein this first cresset drive circuit and this second cresset drive circuit respectively comprise a light source, and the light source of the light source of this first cresset drive circuit and this second cresset drive circuit is with identical cycle ratio flicker.Embodiments of the invention provide a kind of cresset driving method, comprise and produce a signal; This signal is separated into one first control signal and one second control signal; And according to this first control signal and this second control signal control one first light source and secondary light source, wherein this first light source glimmers according to the cycle ratio with identical with this secondary light source.Wherein, D flip-flop comprises: a data input pin, a clock trigger end, an output and a reversed-phase output, clock trigger end receives signal, the output signal of reversed-phase output is fed back to data input pin, and output and this first cresset drive circuit of reversed-phase output control and this second cresset drive circuit.Wherein, signal separates generator and comprises one first diode, and its anode and output couple, and its negative electrode and clock trigger end couple.
The lamp drive device that embodiments of the invention provide and method can be saved LPG pin position, and reduce the complexity of software.
For above and other objects of the present invention, feature and advantage can be become apparent, cited below particularly go out preferred embodiment, and be described with reference to the accompanying drawings as follows.
Brief description of the drawings
Fig. 1 is the circuit diagram of traditional lamp drive device.
Fig. 2 is the circuit diagram of traditional lamp drive device.
Fig. 3 is the block schematic diagram according to the lamp drive device of one embodiment of the invention.
Fig. 4 is the circuit diagram of the lamp drive device 300 shown in Fig. 3.
Fig. 5 is the sequential chart that the lamp drive device 300 shown in Fig. 4 operates required each signal.
Fig. 6 is the cresset driving method according to one embodiment of the invention.
Reference numeral explanation
300～lamp drive device; 310～signal generator;
320～signal separates generator; 322～D flip-flop;
330～cresset drive circuit;
R1, R2～resistance;
SW1, SW2～switch;
CPU～CPU; The input and output of GPIO～general-purpose
D1～the first diode; D2～the second diode;
D～data input pin; CLK～clock trigger end;
* CLR, * PRO～pin position;
Q～output;
～reversed-phase output;
323,327～anode; 325,328～negative electrode;
331～light-emitting diode; 333～switch;
332～first end; 334～the second ends;
335～first end; 336～the second ends;
The 337～three end;
V
dDthe～the first fixed potential; V
ssthe～the second fixed potential;
Vcc fixed potential
A～node;
B～node;
610～generation, one signal;
620～this signal is separated into multiple control signals;
630～control respectively flickering of multiple light sources according to described control signal control.
Embodiment
Fig. 3 is the block schematic diagram according to the lamp drive device of one embodiment of the invention, this lamp drive device 300 comprises that a signal generator 310, a signal separate generator 320 and at least one cresset drive circuit 330, signal generator 310 produces a signal, signal separates generator 320 this single signal is separated into at least one control signal, and cresset drive circuit 330 is controlled by control signal.Preferably, signal generator 310 is a LPG signal generator, and this signal producing is a LPG signal.Each cresset drive circuit 330 comprises a light-emitting diode 331 and a switch 333, and preferably, this switch 333 is a metal oxide semiconductor transistor, and light-emitting diode 331 is with its first end 332 and one first fixed potential V
dDconnect, switch 333 (metal oxide semiconductor transistor) couples with its first end (drain electrode) 335 and the second end 334 of this light-emitting diode 331, the second end (source electrode) 336 and one second fixed potential V
ssconnect, the 3rd end 337 (grid) separates generator 320 with this signal and couples, to receive at least one control signal, preferably, this first fixed potential V
dDwith the second fixed potential V
ssbe respectively power supply supply current potential and an earthing potential.
More particularly, Fig. 4 is the circuit embodiments of the lamp drive device 300 shown in Fig. 3, this signal separates generator 320 and comprises a D flip-flop 322, one first diode D1 and one second diode D2, and D flip-flop 322 has a data input pin D, a clock trigger end CLK, an output Q and a reversed-phase output
, this clock trigger end CLK receives this signal, this reversed-phase output
output signal be fed back to this data input pin D, and this output Q and this reversed-phase output
control respectively described cresset drive circuit 330, the first diode D1 and couple with this output Q with its anode 323, its negative electrode 325 couples with this clock trigger end CLK, and the second diode D2 is with its anode 327 and this reversed-phase output
couple, its negative electrode 328 couples with this clock trigger end CLK.
Fig. 5 is the sequential chart that the lamp drive device 300 shown in Fig. 4 operates required each signal, the signal that LPG representation signal generator 310 produces, Q with
represent respectively output Q and reversed-phase output
output signal, A and B be the level of node A and B in representative graph 4 respectively, this specification is taking initial condition Q as low level,
for the situation of high level is example, the operation of point four-stage explanation lamp drive device 300, when the first stage, when LPG transfers high level to by low level,
logical value kept in (1atch) via input D, therefore Q transfers high level to by low level, complementary
transfer low level to by high level, the first diode D1 and the second diode D2 all cannot conductings, and therefore A point is high level, and B point is low level; When second stage, LPG transfers low level to by high level, and the first diode D1 conducting is also pulled to low level by A point, and B point is still low level; When phase III, when LPG transfers high level to by low level again,
low level by input D kept in (1atch) live, Q transfer low level to by high level and
transfer high level to by low level, the first diode D1 and the second diode D2 all cannot conductings, therefore A point is low level, B point is high level; When fourth stage, LPG turns low level by high level, and B point is dragged down level by the second diode D2 conducting, and A point is still low level, so constantly repeats aforesaid four-stage, the two doubling times flickers that light-emitting diode 331 can LPG signal.
Embodiments of the invention also provide a kind of cresset driving method, and as shown in Figure 6, the method comprises generation one signal (610); This signal is separated into at least one control signal (620); And according at least one light source of control signal control control (630), more particularly, this signal is a LPG signal, described light source is light-emitting diode.
A light-emitting diode can only be controlled in a LPG pin position compared to traditional lamp drive device, lamp drive device provided by the present invention can be controlled two light-emitting diodes with a LPG pin position, save LPG pin position, lamp drive device provided by the present invention only need to be set cycle and the cycle ratio (Duty cycle) of what a LPG signal on software simultaneously, can make two light-emitting diodes with identical cycle ratio flicker.
Although the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention; those skilled in the art can do some changes and retouching under the premise without departing from the spirit and scope of the present invention, and therefore protection scope of the present invention is as the criterion with claim of the present invention.
Claims (6)
1. a lamp drive device, comprising:
One signal generator, produces a signal;
One signal separates generator, and this signal is separated into one first control signal and one second control signal; And
One first cresset drive circuit and one second cresset drive circuit, controlled by this first control signal and this second control signal respectively, wherein this first cresset drive circuit and this second cresset drive circuit respectively comprise a light source, and the light source of the light source of this first cresset drive circuit and this second cresset drive circuit is with identical cycle ratio flicker;
Wherein, signal separation generator comprises:
One D flip-flop, comprise a data input pin, a clock trigger end, an output and a reversed-phase output, clock trigger end receives signal, the output signal of reversed-phase output is fed back to data input pin, and output and this first cresset drive circuit of reversed-phase output control and this second cresset drive circuit;
Wherein, signal separates generator and comprises one first diode, and its anode and output couple, and its negative electrode and clock trigger end couple.
2. lamp drive device as claimed in claim 1, wherein signal generator is a light-emitting diode pulse generator, and the signal producing is a light-emitting diode pulse generator signal.
3. lamp drive device as claimed in claim 1, wherein, this light source of this first cresset drive circuit and this second cresset drive circuit, one first end is connected with one first fixed potential, and this first cresset drive circuit also respectively comprises with this second cresset drive circuit:
One switch, the second end of one first end and light source couples, and one the second end is connected with one second fixed potential, and one the 3rd end separates generator with signal and couples, to receive one of them of this first control signal and this second control signal.
4. lamp drive device as claimed in claim 3, wherein light source and switch comprise respectively a light-emitting diode and a metal oxide semiconductor transistor, and its first end for drain electrode, the second end is source electrode, the 3rd end is grid.
5. lamp drive device as claimed in claim 3, wherein first and second fixed potential comprises respectively power supply supply current potential and an earthing potential.
6. lamp drive device as claimed in claim 1, wherein, signal separates generator and comprises one second diode, and its anode and reversed-phase output couple, and its negative electrode and clock trigger end couple.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610092688.6A CN101090595B (en) | 2006-06-13 | 2006-06-13 | Lamp drive device |
| EP07110099.4A EP1868420B1 (en) | 2006-06-13 | 2007-06-12 | Light driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610092688.6A CN101090595B (en) | 2006-06-13 | 2006-06-13 | Lamp drive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101090595A CN101090595A (en) | 2007-12-19 |
| CN101090595B true CN101090595B (en) | 2014-09-10 |
Family
ID=38481940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610092688.6A Active CN101090595B (en) | 2006-06-13 | 2006-06-13 | Lamp drive device |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1868420B1 (en) |
| CN (1) | CN101090595B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375451A (en) * | 2018-09-25 | 2019-02-22 | 东莞锐视光电科技有限公司 | Light source controller Time delay control method and system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6850995B1 (en) | 1999-01-25 | 2005-02-01 | Canon Kabushiki Kaisha | Control unit selectively connected with a first bus and a second bus for controlling a displaying process in parallel with a scanning process |
| US6786625B2 (en) * | 1999-05-24 | 2004-09-07 | Jam Strait, Inc. | LED light module for vehicles |
| DE10115388A1 (en) * | 2001-03-28 | 2002-10-10 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Control circuit for an LED array |
| JP2004235498A (en) * | 2003-01-31 | 2004-08-19 | Anden | Light emitting diode controller |
| US7233115B2 (en) * | 2004-03-15 | 2007-06-19 | Color Kinetics Incorporated | LED-based lighting network power control methods and apparatus |
| EP1656001B1 (en) | 2004-11-03 | 2011-07-06 | HTC Corporation | Flashing lights control apparatus |
-
2006
- 2006-06-13 CN CN200610092688.6A patent/CN101090595B/en active Active
-
2007
- 2007-06-12 EP EP07110099.4A patent/EP1868420B1/en active Active
Non-Patent Citations (1)
| Title |
|---|
| 龚昌来.单片机控制的智能型抢答器设计.广东自动化与信息工程.2003,(03), * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375451A (en) * | 2018-09-25 | 2019-02-22 | 东莞锐视光电科技有限公司 | Light source controller Time delay control method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1868420A3 (en) | 2008-12-03 |
| EP1868420B1 (en) | 2014-11-26 |
| CN101090595A (en) | 2007-12-19 |
| EP1868420A2 (en) | 2007-12-19 |
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