CN101547545A - Fluorescent lamp control circuit - Google Patents
Fluorescent lamp control circuit Download PDFInfo
- Publication number
- CN101547545A CN101547545A CN200810089828A CN200810089828A CN101547545A CN 101547545 A CN101547545 A CN 101547545A CN 200810089828 A CN200810089828 A CN 200810089828A CN 200810089828 A CN200810089828 A CN 200810089828A CN 101547545 A CN101547545 A CN 101547545A
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- unit
- electric capacity
- fluorescent lamp
- signal
- diode
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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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/382—Controlling the intensity of light during the transitional start-up phase
- H05B41/386—Controlling the intensity of light during the transitional start-up phase for speeding-up the lighting-up
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The invention discloses a fluorescent lamp control circuit, which comprises a ballast control unit, an oscillator unit, a signal detection unit, a switch unit and a frequency conversion unit, wherein the signal detection unit outputs a signal to the switch unit after receiving a signal for turning on the lamp from the ballast control unit, the switch unit outputs a signal to the frequency conversion unit, and the frequency conversion unit outputs a signal to the oscillator unit and changes the oscillation frequency. The control circuit uses the action of triggering the switch unit by the signal detection unit after the signal detection unit receives the signal for turning on the lamp, and the action of the switch unit makes the frequency conversion unit work to change the oscillation frequency of the oscillator unit of the fluorescent lamp, increase the filament current of the fluorescent lamp and improve the light transmission rate of the fluorescent lamp, so that the fluorescent lamp can reach normal brightness quickly in a short time.
Description
Technical field
The present invention relates to a kind of control circuit of fluorescent lamp, relate in particular to a kind ofly in certain period of time, can strengthen the electric current of fluorescent lamp, make fluorescent lamp can reach the control circuit of normal brightness in the short period of time fast.
Background technology
Fluorescent lamp on the market all is to utilize mercury to launch ultraviolet ray at present.Generally speaking, mercury exists with liquid form, also has with amalgam (coccoid mercury alloy) form to exist.Compare with liquid mercury, amalgam exists bigger advantage, but amalgam need just can be launched ultraviolet ray when being subjected to thermal excitation.Therefore, the fluorescent lamp of use amalgam will reach specified output light flux and need the regular hour, and near the heat behind the fluorescent lamp lighting amalgam is determining the evaporation capacity of coccoid amalgam.It is darker when fluorescent lamp is just lighted that people often feel, just reach normal brightness after a period of time.Brought inconvenience when also using fluorescent lamp thus to people.
It is luminous that common fluorescent lamp adopts ballast control unit and oscillator unit composition control circuit to control lighting of fluorescent lamp, general this control circuit can be lighted fluorescent lamp in the mode of certain warm-up time or without preheating time, the control circuit of this mode initial frequency when starting oscillation is higher, frequency of oscillation is with speed decline faster subsequently, and fluorescent tube is lighted in the time period that frequency descends.This mode needs a period of time consuming time from fluorescent lamp lighting to normal brightness, and therefore when fluorescent lamp was just opened, people's panesthesia is " dim " a bit; So a kind of control circuit need be arranged to adjust the frequency of oscillation of oscillator unit, when fluorescent lamp is opened, make fluorescent lamp reach normal brightness fast.
Summary of the invention
Technical problem to be solved by this invention provides a kind of fluorescent lamp control circuit, the electric current of its increasing fluorescent lamp by the short time in specific time increases the heat of amalgam, thereby quicken the evaporation rate of amalgam, make fluorescent lamp can reach normal brightness in the short period of time apace.
For solving the problems of the technologies described above, fluorescent lamp control circuit of the present invention, comprise ballast control unit and oscillator unit, detecting signal unit, switch element and converter unit, described detecting signal unit outputs signal to switch element behind the signal that the described ballast control unit of acceptance is turned on light, described switch element outputs signal to described converter unit, and described converter unit outputs signal to described oscillator unit and changes frequency of oscillation.
Preferably, described detecting signal unit comprises diode, resistance and first electric capacity, is connected to the negative pole of diode after the described resistance and the first electric capacity parallel connection, and the positive pole of described diode is connected with described ballast control unit; Described switch element is a NMOS pipe, and its grid connects the negative pole of described diode, source ground; Described converter unit comprises second electric capacity and the 3rd electric capacity, and described second electric capacity is connected with the 3rd capacitances in series, and is parallel between the drain electrode and source electrode of described NMOS pipe, and the tie point of described second electric capacity and the 3rd electric capacity is connected described oscillator unit.
Preferably, described oscillator unit also comprises a current comparator, described detecting signal unit comprises the diode and first electric capacity, the positive pole of described diode connects described ballast control unit, its negative pole connects first electric capacity, the other end ground connection of first electric capacity, described switch element is a NMOS pipe, its grid connects the negative pole of described diode, source ground, draining connects the negative terminal of described current comparator by resistance, and described converter unit comprises second electric capacity, one end ground connection of described second electric capacity, its other end connects described oscillator unit.
Because fluorescent lamp control circuit of the present invention has adopted technique scheme, promptly utilize the detecting signal unit trigger switch unit action behind the signal of accepting to turn on light, make converter unit work after the switch element action, to change the frequency of oscillation of fluorescent lamp oscillating circuit, strengthened fluorescent lamp filament current, improve the light passband of fluorescent lamp, make fluorescent lamp can reach normal brightness in the short period of time apace.
Description of drawings
The present invention is described in further detail below in conjunction with drawings and embodiments:
Fig. 1 is the block diagram of fluorescent lamp control circuit of the present invention,
Fig. 2 is the schematic diagram of a kind of fluorescent lamp control circuit of the present invention,
Fig. 3 is the schematic diagram of the another kind of fluorescent lamp control circuit of the present invention.
Embodiment
As shown in Figure 1, fluorescent lamp control circuit of the present invention, comprise ballast control unit 1 and oscillator unit 2, detecting signal unit 3, switch element 4 and converter unit 5, described detecting signal unit 3 outputs signal to switch element 4 behind the signal that the described ballast control unit 1 of acceptance is turned on light, described switch element 4 outputs signal to described converter unit 5, and described converter unit 5 outputs signal to described oscillator unit 2 and changes frequency of oscillation.
Preferably, as shown in Figure 2, described detecting signal unit comprises diode D1, resistance R 1 and capacitor C timer, is connected to the negative pole of diode D1 after described resistance R 1 and the capacitor C timer parallel connection, and the positive pole of described diode D1 is connected with described ballast control unit; Described switch element is a NMOS pipe, and its grid connects the negative pole of diode D1, source ground; Described converter unit comprises capacitor C f and Cqst, and described capacitor C f and Cqst are connected in series, and is parallel between the drain electrode and source electrode of described NMOS pipe, and the tie point of described capacitor C f and Cqst is connected described oscillator unit.
Control circuit shown in Figure 2 can by the digital signal of ballast control unit or warm-up time signal start.When diode D1 detects high level signal, D1 conducting and to timing capacitor C timer charging, the voltage of timing capacitor C timer is used for the conducting of driving N metal-oxide-semiconductor, and the NMOS pipe plays switch in circuit.When the conducting of NMOS pipe, capacitor C f and capacitor C qst are connected in parallel and determine fluorescent lamp to reach the frequency of the fluorescent lamp of normal brightness process fast thus, and capacitor C qst is determining the frequency of the normal burning-point of fluorescent lamp.After the time period that reaches normal brightness fast (time signal is zero), the NMOS pipe ends, and the oscillating circuit of controller only is connected with capacitor C f, and this moment, circuit working was in normal operating frequency.
Preferably, as shown in Figure 3, described oscillator unit also comprises a current comparator, described detecting signal unit comprises diode D2 and capacitor C 1, the positive pole of described diode D2 connects described ballast control unit, its negative pole connects capacitor C 1, the other end ground connection of capacitor C 1, described switch element is a NMOS pipe, and its grid connects the negative pole of diode D1, source ground, drain electrode connects the negative terminal of described current comparator by resistance R 3, described converter unit comprises capacitor C quickstart, the end ground connection of described capacitor C quickstart, and its other end connects described oscillator unit.
Control circuit shown in Figure 3 can by the digital signal of ballast control unit or warm-up time signal start.When diode D2 detects high level signal, D2 conducting and to timing capacitor C 1 charging, the voltage of timing capacitor C 1 is used for the conducting of driving N metal-oxide-semiconductor, and the NMOS pipe plays switch in circuit.When the conducting of NMOS pipe, the negative input end short circuit of current comparator, the positive input terminal of current comparator has the electric current of skew owing to the influence that is subjected to Vset1 voltage or light adjusting circuit voltage signal Vdim.When the negative input end current value of current comparator was zero, the operating frequency of circuit dropped to minimum.This moment, the frequency of circuit was determined by capacitor C quickstart.When the time period that reaches normal brightness fast finishes (time signal is zero), NMOS manages shutoff, the voltage of the negative input end of current comparator (magnitude of voltage equals the voltage at Rlamp two ends) will be adjusted to the magnitude of voltage of positive input terminal, thereby circuit working is in normal operating frequency (normal lamp current value), or the frequency of the class correspondence of the fluorescent lamp of light modulation institute light modulation.
Claims (3)
1. fluorescent lamp control circuit, comprise ballast control unit and oscillator unit, it is characterized in that: also comprise detecting signal unit, switch element and converter unit, described detecting signal unit outputs signal to switch element behind the signal that the described ballast control unit of acceptance is turned on light, described switch element outputs signal to described converter unit, and described converter unit outputs signal to described oscillator unit and changes the frequency of oscillation of oscillator unit.
2. fluorescent lamp control circuit according to claim 1, it is characterized in that: described detecting signal unit comprises diode (D1), resistance (R1) and first electric capacity (Ctimer), be connected to the negative pole of diode (D1) after described resistance (R1) and first electric capacity (Ctimer) parallel connection, the positive pole of described diode (D1) is connected with described ballast control unit; Described switch element is a NMOS pipe, and its grid connects the negative pole of described diode (D1), source ground; Described converter unit comprises second electric capacity (Cf) and the 3rd electric capacity (Cqst), described second electric capacity (Cf) and the 3rd electric capacity (Cqst) are connected in series, and be parallel between the drain electrode and source electrode of described NMOS pipe, described second electric capacity (Cf) is connected described oscillator unit with the tie point of the 3rd electric capacity (Cqst).
3. fluorescent lamp control circuit according to claim 1, it is characterized in that: described oscillator unit also comprises a current comparator, described detecting signal unit comprises diode (D2) and first electric capacity (C1), the positive pole of described diode (D2) connects described ballast control unit, its negative pole connects first electric capacity (C1), the other end ground connection of first electric capacity (C1), described switch element is a NMOS pipe, its grid connects the negative pole of described diode (D2), source ground, drain electrode connects the negative terminal of described current comparator by resistance (R3), described converter unit comprises second electric capacity (Cquickstart), one end ground connection of described second electric capacity (Cquickstart), its other end connects described oscillator unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810089828A CN101547545A (en) | 2008-03-28 | 2008-03-28 | Fluorescent lamp control circuit |
| EP20090250863 EP2106201A2 (en) | 2008-03-28 | 2009-03-26 | Control circuit for fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810089828A CN101547545A (en) | 2008-03-28 | 2008-03-28 | Fluorescent lamp control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101547545A true CN101547545A (en) | 2009-09-30 |
Family
ID=40795054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810089828A Pending CN101547545A (en) | 2008-03-28 | 2008-03-28 | Fluorescent lamp control circuit |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2106201A2 (en) |
| CN (1) | CN101547545A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707836B (en) * | 2009-11-12 | 2013-05-01 | 英飞特电子（杭州）股份有限公司 | Circuit for dimming through power switch |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1291420A (en) * | 1998-12-28 | 2001-04-11 | 皇家菲利浦电子有限公司 | Ballast circuit |
| CN2525766Y (en) * | 2001-08-14 | 2002-12-11 | 朱新刚 | High frequency constant amplitude electronic ballast |
| CN1882211A (en) * | 2005-06-13 | 2006-12-20 | 三星电机株式会社 | Driving apparatus for CCFL |
| CN1977570A (en) * | 2004-06-28 | 2007-06-06 | 皇家飞利浦电子股份有限公司 | Fluorescent tube lamp drive circuit |
-
2008
- 2008-03-28 CN CN200810089828A patent/CN101547545A/en active Pending
-
2009
- 2009-03-26 EP EP20090250863 patent/EP2106201A2/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1291420A (en) * | 1998-12-28 | 2001-04-11 | 皇家菲利浦电子有限公司 | Ballast circuit |
| CN2525766Y (en) * | 2001-08-14 | 2002-12-11 | 朱新刚 | High frequency constant amplitude electronic ballast |
| CN1977570A (en) * | 2004-06-28 | 2007-06-06 | 皇家飞利浦电子股份有限公司 | Fluorescent tube lamp drive circuit |
| CN1882211A (en) * | 2005-06-13 | 2006-12-20 | 三星电机株式会社 | Driving apparatus for CCFL |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707836B (en) * | 2009-11-12 | 2013-05-01 | 英飞特电子（杭州）股份有限公司 | Circuit for dimming through power switch |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2106201A2 (en) | 2009-09-30 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20090930 |