CN1433131A - Step-up circuit and power soure convertor - Google Patents
Step-up circuit and power soure convertor Download PDFInfo
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- CN1433131A CN1433131A CN 02101784 CN02101784A CN1433131A CN 1433131 A CN1433131 A CN 1433131A CN 02101784 CN02101784 CN 02101784 CN 02101784 A CN02101784 A CN 02101784A CN 1433131 A CN1433131 A CN 1433131A
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- circuit
- booster circuit
- signal
- transformer
- electric capacity
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Abstract
The step-up circuit includes the first capacitor, transformer, sensing resistor, and the second capacitor. The step-up side coil of the transformer has one end connected to the first capacitor and the other end connected to the sensing resistor; and the second capacitor is connected to the transformer parallelly. The power source converter of the present invention consists of step-up circuit and detection circuit, the step-up circuit generates one voltage and outputs one signal for detecting spark, and the detection circuit connected to the step-up circuit is used to receive the signal from the step-up circuit. In case the detection circuit detects some bust signal, the step-up circuit is judged to produce spark and one control signal is output according to the burst signal.
Description
Technical field
The present invention relates to a kind of booster circuit and power supply changeover device, be meant a kind of booster circuit and power supply changeover device of tool arcing phenomenon detection function especially.
Background technology
Along with the development of opto-electronics, light emitting source is except that the illumination that is beneficial to daily life, and less light emitting source (as the LCD fluorescent tube, LCD lamp) is widely used in the various electronic products, for example promptly is equipped with the light emitting source as usefulness backlight in the LCD display.
Generally speaking, lighting fluorescent tube must carry out with power supply changeover device, existing power supply changeover device mainly comprises oscillator and booster circuit, and wherein this oscillator is in order to producing the required a-c cycle of fluorescent tube, and this booster circuit activates fluorescent tube in order to produce sufficiently high voltage.
Existing booster circuit 1, as shown in Figure 1, it mainly comprises the sensing resistor R that uses as the sensing loop electric current
s, transducer T, and the capacitor C used of stored voltage used as voltage transitions.As shown in Figure 1, figure number 2 expression a connector, and figure number 3 expression fluorescent tubes.In other words, this fluorescent tube 3 is to be electrically connected with this booster circuit 1 by this connector 2.
With regard to above-mentioned formation,, there is the then whole booster circuit 1 of phenomenon of loose contact will have the generation of arcing phenomenon if this fluorescent tube 3 is not inserted really with this connector 2.In addition, if whole booster circuit 1 have short-range open circuit or the transducer T of this booster circuit 1 in winding wire when fracture, also can produce the arcing phenomenon.Moreover, if a certain electric conductor of product during too near this booster circuit 1, also can produce the arcing phenomenon.
During owing to initial production generation arcing phenomenon, general fluorescent tube still can be normally luminous, and list just can't be discovered on product appearance or the picture quality easily, therefore flows into the market as not adding detection and will cause unfavorable condition generations such as the product burning is black.Severe patient more is if meet inflammable gas (when routine product is positioned at the gas station) and may cause great disaster because of the arcing phenomenon produces arcing.
For judging whether product has the arcing phenomenon, generally is to utilize sensing resistor to be detected, in other words, promptly be the output voltage waveforms that detects A point place shown in Figure 1, judge according to this whether booster circuit is normal.So, with regard to the method, and fail accurately to measure this booster circuit and whether have and produce the arcing phenomenon.Shown in Fig. 2 A, when having the arcing phenomenon, booster circuit produces, should record surge signal a at A point place in theory
1, a
2, but by Fig. 2 A as can be known, if with existing detection mode, this surge signal a
1, a
2May be hidden in the output waveform, and be difficult for making the people to discover, so, will make bad product flow into the market, and then cause the danger in the use.
Because how the problems referred to above can avoid flowing into the market positively with there being the product of arcing phenomenon to detect, or can activate protection mechanism in real time when product produces the arcing phenomenon is an important topic in fact.In brief, how providing to have the booster circuit or the power supply changeover device that can accurately detect the arcing phenomenon, is an important topic in fact.
Summary of the invention
The object of the present invention is to provide a kind of booster circuit that can detect the arcing phenomenon really.
The object of the present invention is to provide a kind of power supply changeover device that can detect the arcing phenomenon really.
For reaching above-mentioned purpose, the invention provides a kind of booster circuit, comprise one first electric capacity, a transformer, a sensing resistor, reach one second electric capacity.Wherein, an end of the step-up side coil of transformer and first capacitances in series; Sensing resistor is connected with the other end of transformer step-up side coil; And an end and the transformers connected in parallel of second electric capacity.
In addition, the invention provides a kind of power supply changeover device, comprise a booster circuit, an and checking circuit, wherein, booster circuit is in order to producing a voltage, and exports one and use signal in order to detect detecting of arcing phenomenon; Checking circuit is electrically connected with booster circuit, use signal in order to receive detecting that this booster circuit exports, when checking circuit detects when containing a surge signal in detecting with signal, judge that then booster circuit produces the arcing phenomenon, and export a control signal according to this surge signal.
And the invention is characterized in the high pass characteristic of utilizing electric capacity, and detect with the surge signal that a booster circuit or a power supply changeover device produced, judged whether accurately that according to this arcing phenomenon produces.
Description of drawings
Above-mentioned and other purpose, advantage and characteristic of the present invention by in the detailed description of following preferred embodiment and with reference to the accompanying drawings when can be clearer, wherein:
Fig. 1 is the electrical connection key diagram of existing booster circuit and fluorescent tube;
Fig. 2 A is the output voltage wave schematic diagram at A point place in the existing booster circuit;
Fig. 2 B is the output voltage wave schematic diagram at B point place in the booster circuit of the present invention;
Fig. 3 is the electrical connection key diagram of booster circuit of the present invention and fluorescent tube;
Fig. 4 is the electrical connection key diagram of power supply changeover device of the present invention and fluorescent tube.
Symbol description among the figure:
1 booster circuit
1 ' booster circuit
11 ' first electric capacity
12 ' transformer
13 ' sensing resistor
14 ' second electric capacity
One end of 141 ' second electric capacity
The other end of 142 ' second electric capacity
2 connectors
3 fluorescent tubes
4 detectors
5 protective circuits
Embodiment
Below will specify preferred embodiment of the present invention according to icon.And, be the facility in the explanation, in the present embodiment, continued to use with above-mentioned existing identical assembly figure number.
At first, please refer to shown in Figure 3ly, comprise one first electric capacity 11 ', a transformer 12 ', a sensing resistor 13 ', and one second electric capacity 14 ' according to the booster circuit 1 ' of preferred embodiment of the present invention.
One end 141 ' of this second electric capacity 14 ' is electrically connected between this transformer 12 ' and this sensing resistor 13 '.At this moment, if utilize a detector 4 to detect the output signal of the other end 142 ' of this second electric capacity 14 ', shown in Fig. 2 B, in this output signal, contain a surge signal b
1During (inrush signal) (or surge signal b2), judge that then this booster circuit produces the arcing phenomenon.In the present embodiment, this detector 4 can be oscilloscope or other checking circuit.
By Fig. 2 A and Fig. 2 B as can be known, because booster circuit 1 ' of the present invention can make this detector 4 can detect surge signal b in the output waveform at B point place by the high pass characteristic of second electric capacity 14 '
1(or surge signal b
2), therefore, the arcing phenomenon that can accurately detect booster circuit 1 ' and produced.
Above-mentioned explanation is relevant booster circuit of the present invention, below will specify power supply changeover device of the present invention with Fig. 4.
As shown in Figure 4, power supply changeover device of the present invention comprises a booster circuit 1 ', reaches a checking circuit 4.Wherein, the circuit of this booster circuit 1 ' constitutes as above-mentioned embodiment, is not described in detail in this.This booster circuit 1 ' is in order to producing a higher voltage, and exports one and can use signal in order to detect detecting of arcing phenomenon.This checking circuit is electrically connected on this booster circuit 1 ', use signal in order to receive detecting that this booster circuit exports, when checking circuit detects when containing a surge signal in detecting with signal, judge that then booster circuit produces the arcing phenomenon, and export a control signal according to this surge signal.
Refer again to shown in Figure 4; power supply changeover device of the present invention also can comprise a protective circuit 5 (protect circuit); this protective circuit 5 is electrically connected with this checking circuit 4, and it is in order to receiving the control signal that this checking circuit is exported, and produces an off signal according to this control signal.In view of the above, when a certain electronic product produces the arcing phenomenon, can shut down, to avoid producing danger according to the off signal that protective circuit 5 is produced.
From the above, the specific embodiment that is proposed in the detailed description of preferred embodiment is only in order to be easy to illustrate technology contents of the present invention, and be not with narrow sense of the present invention be limited to this embodiment, under the situation that does not exceed spirit of the present invention and claims, can make many variations and implement.
Claims (7)
1. booster circuit is characterized in that: comprise:
One first electric capacity;
One transformer, an end of its step-up side coil and this first capacitances in series;
One sensing resistor is connected with the other end of this transformer step-up side coil; And
One second electric capacity, one end and this transformers connected in parallel.
2. booster circuit as claimed in claim 1 is characterized in that: an end of this second electric capacity is electrically connected between this transformer and this sensing resistor.
3. power supply changeover device in order to one first voltage transitions is become electric two voltages, comprises:
One booster circuit in order to producing this second voltage, and is exported one and is used signal in order to detect detecting of arcing phenomenon;
One checking circuit, be electrically connected this booster circuit, use signal, when this checking circuit detects this when containing a surge signal in detecting with signal in order to receive detecting that this booster circuit exports, judge that then this booster circuit produces the arcing phenomenon, and export a control signal according to this surge signal.
4. power supply changeover device as claimed in claim 3 is characterized in that: it also comprises a protective circuit, is electrically connected on this checking circuit, in order to receiving the control signal that this checking circuit is exported, and produces an off signal according to this control signal.
5. power supply changeover device as claimed in claim 3 is characterized in that: this booster circuit comprises:
One first electric capacity;
One transformer, an end of its step-up side coil and this first capacitances in series;
One sensing resistor is connected with the other end of this transformer step-up side coil; And
One second electric capacity, one end and this transformers connected in parallel.
6. power supply changeover device as claimed in claim 3 is characterized in that: an end of this second electric capacity is electrically connected between this transformer and this sensing resistor.
7. power supply changeover device as claimed in claim 3 is characterized in that: this detects with signal is other end output by second electric capacity of this booster circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02101784 CN1433131A (en) | 2002-01-18 | 2002-01-18 | Step-up circuit and power soure convertor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02101784 CN1433131A (en) | 2002-01-18 | 2002-01-18 | Step-up circuit and power soure convertor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1433131A true CN1433131A (en) | 2003-07-30 |
Family
ID=27627382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02101784 Pending CN1433131A (en) | 2002-01-18 | 2002-01-18 | Step-up circuit and power soure convertor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1433131A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463178C (en) * | 2005-06-23 | 2009-02-18 | 精工爱普生株式会社 | Semiconductor device and boosting circuit |
| US7579789B2 (en) | 2006-09-29 | 2009-08-25 | Hon Hai Precision Industry Co., Ltd. | Device for driving light sources |
| US7834562B2 (en) | 2005-12-16 | 2010-11-16 | Minebea Co., Ltd. | Discharge lamp lighting device |
-
2002
- 2002-01-18 CN CN 02101784 patent/CN1433131A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463178C (en) * | 2005-06-23 | 2009-02-18 | 精工爱普生株式会社 | Semiconductor device and boosting circuit |
| US7834562B2 (en) | 2005-12-16 | 2010-11-16 | Minebea Co., Ltd. | Discharge lamp lighting device |
| US7579789B2 (en) | 2006-09-29 | 2009-08-25 | Hon Hai Precision Industry Co., Ltd. | Device for driving light sources |
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| SE01 | Entry into force of request for substantive examination | ||
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| 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 |