CN1459927A - Switching type luminuous circuit - Google Patents
Switching type luminuous circuit Download PDFInfo
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- CN1459927A CN1459927A CN 02120603 CN02120603A CN1459927A CN 1459927 A CN1459927 A CN 1459927A CN 02120603 CN02120603 CN 02120603 CN 02120603 A CN02120603 A CN 02120603A CN 1459927 A CN1459927 A CN 1459927A
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- luminuous
- circuit
- pulse wave
- switching type
- periodic signal
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Abstract
A switched luminescent circuit is composed of an input for receiving external working voltage, a luminescent element, a switch element with one terminal connected to said voltage input and another terminal connected to said luminescent element for providing an intermittent voltage to it, a cycle signal generator for generating a duty cycle and frequency adjustable cyclic pulse signal to control said switch element, and an intermittent light regulator for generating more than one cyclic pulse signal to control more switch element. It is possible that one switch element can be controlled by more than one cyclic pulse signals with different phases for intermittent lightings of luminescent element.
Description
Technical field
The present invention relates to the control circuit of light-emitting component, particularly relevant for a kind of switching type luminuous circuit that utilizes the switching of pulse wave cycle.
Background technology
Element such as light-emitting diode (LED), laser vacuum tubes (LaserDiode) etc. such as existing luminous, illumination, projection, when luminous application, adopt the input voltage continuous conduction mode, continue to allow element conductive luminous, such pattern makes the consumption of input voltage to continue and fast.As use battery to be used as the input power supply, then then be subjected to the restriction of the capacity and the depletion rate of battery the service time of light-emitting component.
When described light-emitting component is applied to indication or when painstakingly not emphasizing its brightness, in order to save the purpose of power supply, so the present invention proposes a kind of switching type luminuous circuit, makes that light-emitting component can be intermittently luminous, in order to reach the purpose of saving power supply.
Summary of the invention
In view of many shortcomings that light-emitting component control circuit traditional in the above-mentioned background of invention is produced, the invention provides a kind of switching type luminuous circuit that the pulse wave cycle switches that utilizes, in order to overcome the problem that light-emitting component control circuit is traditionally derived.
Main purpose of the present invention is for proposing a kind of switching type luminuous circuit of adjusting its work period and frequency.
Another object of the present invention is for proposing a kind of at least one pulse wave periodic signal that produces, in order to the switching type luminuous circuit of the luminous action of controlling at least one light-emitting component.
According to above-described purpose, the invention provides a kind of switching type luminuous circuit, the tool low consumption is electrical, in order to save required driving voltage, and be difficult for discovering its change action when switching is luminous, this switching type luminuous circuit comprises: voltage input end point receives direct current voltage input; One light-emitting component; One switch element has one first end points and connects this voltage input end point, and one second end points output one is interrupted the direct voltage of conducting to this light-emitting component; And one-period signal generator component, produce at least one pulse wave periodic signal, and this pulse wave periodic signal can adjust its work period and frequency, controlling the action of this switch element, and this frequency range is 15Hz to 10MHz.
The present invention also has a kind of technical scheme: a kind of switching type luminuous circuit, the tool low consumption is electrical, in order to saving required driving voltage, and is difficult for discovering its change action when luminous in switching, this switching type luminuous circuit comprises: voltage input end point receives direct current voltage input; A plurality of light-emitting components; A plurality of switch elements, all tool one first end points connects this voltage input end point, and one second end points output one is interrupted the direct voltage of conducting to these a plurality of light-emitting components; And one-period signal generator component, produce at least one pulse wave periodic signal, and this pulse wave periodic signal can adjust its work period and frequency, controlling the action of this switch element, and this frequency range is 15Hz to 10MHz.
In above-mentioned two technical schemes, the periodic signal producing component is an oscillator.This switching type luminuous circuit also comprises a plurality of drivers, receives the pulse wave periodic signal that this oscillator produces, and amplifies this pulse wave periodic signal, to drive these a plurality of switch elements.
Described switch element is N type metal-oxide half field effect transistor switch or P type metal-oxide half field effect transistor switch.
Switching type luminuous circuit of the present invention can produce more than one pulse wave periodic signal, and in order to controlling the switch motion of a plurality of switch elements, or a switch element can be controlled by more than one pulse wave periodic signal.And these have different phase difference by a plurality of pulse wave periodic signals that switching type luminuous circuit of the present invention produced, and with so that take place with the interval operate time of each switch element, reach the intermittently luminous purpose of light-emitting component.
Therefore switching type luminuous circuit of the present invention utilizes and adopts the switching of pulse wave formula, allows the input power supply be interrupted conducting.Surpass under the human-viewable scope at pulse wave cycle switching frequency, utilize human vision to persist principle, will can't harm the light-emitting component performance, and as using battery to be used as the input power supply, utilize the present invention's batch (-type) light adjusting circuit, can reach the saving power supply, prolong the battery purpose in useful life.
Description of drawings
Fig. 1 and Fig. 2 are in order to illustrate a preferred embodiment of the present invention;
Fig. 3 and Fig. 4 are in order to illustrate another preferred embodiment of the present invention.
Embodiment
Preferred embodiment meeting of the present invention is described in detail as follows.Yet except describing in detail, the present invention can also be implemented among other the embodiment widely, and scope of the present invention do not limited, and its claim with claims is as the criterion.
Switching type luminuous circuit of the present invention comprises the voltage input end point, in order to receive the input of external operating voltage; Light-emitting component; Switch element has an end points in order to connect the voltage input end point, reaches another end points of tool in order to provide the voltage that is interrupted conducting to light-emitting component; The periodic signal producing component, in order to produce of the switch motion of pulse wave periodic signal with the control switch element, and this periodic signal producing component can be adjusted the work period (duty cycle) and the frequency of pulse wave periodic signal, and its frequency range is between the 15Hz to 10MHz.
Moreover switching type luminuous circuit of the present invention can produce more than one pulse wave periodic signal, and in order to controlling the switch motion of a plurality of switch elements, or a switch element can be controlled by more than one pulse wave periodic signal.And these have different phase difference by a plurality of pulse wave periodic signals that switching type luminuous circuit of the present invention produced, and with so that take place with the interval operate time of each switch element, reach the intermittently luminous purpose of light-emitting component.
Fig. 1 and Fig. 2 are in order to illustrate a preferred embodiment of the present invention, and Fig. 3 and Fig. 4 are then in order to illustrate another preferred embodiment of the present invention.
With reference to figure 1, one switch element 21, in order to connect input voltage source 20 and light-emitting component 22.When these switch element 21 conductings, input voltage source 20 provides operating voltage to light-emitting component 22, to impel light-emitting component 22 luminous.Yet when this switch element 21 was closed, 20 of this light-emitting component 22 and input voltage sources formed open circuit, so that light-emitting component 22 stops is luminous.
Moreover, switch element 21 can utilize the pulse wave periodic signal, to control its switch motion, and wherein said switch element 21, it in preferred embodiment of the present invention a metal-oxide half field effect transistor (MOSFET) switch, but in of the present invention other practice, then can be any switch element that can control its action by at least one pulse wave signal.
One pulse wave periodic signal producing component 23 can produce the periodic pulse wave signal of tool, with the action of control switch element 21.And this pulse wave periodic signal producing component 23 can be adjusted its work period (duty cycle) and pulse wave signal frequency thereof, and its frequency range is between the 15Hz to 10MHz, in preferred embodiment of the present invention, this pulse wave periodic signal producing component 23 is an oscillator (oscillator), and its work period is 50% as shown in Figure 2, but in of the present invention other practiced, this pulse wave periodic signal producing component 23 can be any element that produces pulse wave signal.
In addition, charge pump (charge pump) 24 is in order to improve input voltage 20, to provide driver 25 (driver) required power supply.By the pulse wave signal that pulse wave periodic signal producing component 23 is produced, after will being amplified by driver 25 earlier, with driving switch element 21.
Yet, in other practice, as use P type metal-oxide half field effect transistor switch as above-mentioned switch element 21, then above-mentioned charge pump 24 and driver 25 can not be required, because the signal that is produced by pulse wave periodic signal device 23 can directly drive P type metal-oxide half field effect transistor switch.
Therefore as shown in Fig. 2, when t1, the signal that pulse wave periodic signal producing component 23 is exported is a high levels, make the switch element conducting, and when t2, signal is a low level, and switch element is closed.Therefore light-emitting component 22 is because the periodic switch motion of switch element tool, and presents step luminous.By Control work cycle and frequency, on the one hand brightness-adjusting and intermittent time, also can reach the effect of saving power supply on the other hand.And if the glow frequency of light-emitting component is higher than visual persistence effect, then the user is the unlikely intermitten of discovering light-emitting component, and thinks that this light-emitting component is lasting luminance.
Fig. 3 and Fig. 4 are another preferred embodiment of the present invention, in Fig. 3, oscillator 40 produces first pulse wave signal 41 and second pulse wave signal 42, in order to input to first driver 43 and second driver 44 respectively, and distinctly control the action of first switch element 45 and second switch element 46, and charge pump (charge pump) 49 is in order to improve input voltage to offer first driver 43 and the required power supply of second driver 44.
In addition, in this another preferred embodiment, as use P type metal-oxide half field effect transistor as above-mentioned first switch element 45 and second switch element 46, then above-mentioned charge pump 49, first driver 43 and second driver 44 can not be required, because the signal that oscillator produced can directly drive this kind P type metal-oxide half field effect transistor switch.
And as shown in Fig. 4, the phase difference of first pulse wave signal and the second pulse wave signal tool 180 degree wherein.Because the phase difference of tool 180 degree, when first pulse wave signal after high levels finishes, then next be in the high levels state by second pulse wave signal, the high levels state that forms two pulse wave signals is alternately appearance, and therefore first light-emitting component 47 and second light-emitting component 48 can present alternately luminous.
Moreover, because it is luminous that first light-emitting component 47 and second light-emitting component 48 present one after the other, therefore first light-emitting component 47 and second light-emitting component 48 can utilize lower glow frequency, in the luminous purpose that just can reach down the persistence of vision of complementation, allow the user is unlikely to discover its luminous intermittence.
The above is preferred embodiment of the present invention only, is not in order to limit claim of the present invention; All other do not break away from the equivalence of being finished under the disclosed spirit and changes or modification, all should be included in the following claim.
Claims (11)
1. switching type luminuous circuit, the tool low consumption is electrical, in order to saving required driving voltage, and is difficult for discovering its change action in switching when luminous, and it is characterized in that: this switching type luminuous circuit comprises:
One voltage input end point receives direct current voltage input;
One light-emitting component;
One switch element has one first end points and connects this voltage input end point, and one second end points output one is interrupted the direct voltage of conducting to this light-emitting component; And
One-period signal generator component, produce at least one pulse wave periodic signal, and this pulse wave periodic signal can adjust its work period and frequency, controlling the action of this switch element, and this frequency range is 15Hz to 10MHz.
2. switching type luminuous circuit as claimed in claim 1 is characterized in that: above-mentioned periodic signal producing component produces the pulse wave signal of a plurality of tool outs of phase.
3. switching type luminuous circuit as claimed in claim 2 is characterized in that: above-mentioned periodic signal producing component is an oscillator.
4. switching type luminuous circuit as claimed in claim 3 is characterized in that: more comprise a driver, receive the pulse wave periodic signal that this oscillator produces, and amplify this pulse wave periodic signal, to drive this switch element.
5. switching type luminuous circuit as claimed in claim 4 is characterized in that: above-mentioned switch element is a N type metal-oxide half field effect transistor switch.
6. switching type luminuous circuit as claimed in claim 3 is characterized in that: above-mentioned switch element is a P type metal-oxide half field effect transistor switch.
7. switching type luminuous circuit, the tool low consumption is electrical, in order to saving required driving voltage, and is difficult for discovering its change action in switching when luminous, and it is characterized in that: this switching type luminuous circuit comprises:
One voltage input end point receives direct current voltage input;
A plurality of light-emitting components;
A plurality of switch elements, all tool one first end points connects this voltage input end point, and one second end points output one is interrupted the direct voltage of conducting to these a plurality of light-emitting components; And
One-period signal generator component, produce at least one pulse wave periodic signal, and this pulse wave periodic signal can adjust its work period and frequency, controlling the action of this switch element, and this frequency range is 15Hz to 10MHz.
8. switching type luminuous circuit as claimed in claim 7 is characterized in that: above-mentioned periodic signal producing component is an oscillator.
9. switching type luminuous circuit as claimed in claim 8 is characterized in that: more comprise a plurality of drivers, receive the pulse wave periodic signal that this oscillator produces, and amplify this pulse wave periodic signal, to drive these a plurality of switch elements.
10. switching type luminuous circuit as claimed in claim 9 is characterized in that: above-mentioned a plurality of switch elements are N type metal-oxide half field effect transistor switch.
11. switching type luminuous circuit as claimed in claim 8 is characterized in that: above-mentioned a plurality of switch elements are P type metal-oxide half field effect transistor switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02120603 CN1459927A (en) | 2002-05-23 | 2002-05-23 | Switching type luminuous circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02120603 CN1459927A (en) | 2002-05-23 | 2002-05-23 | Switching type luminuous circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1459927A true CN1459927A (en) | 2003-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02120603 Pending CN1459927A (en) | 2002-05-23 | 2002-05-23 | Switching type luminuous circuit |
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| CN (1) | CN1459927A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007124666A1 (en) * | 2006-04-28 | 2007-11-08 | Hong Kong Applied Science and Technology Research Institute Co. Ltd | Efficient lighting |
| WO2007124665A1 (en) * | 2006-04-28 | 2007-11-08 | Hong Kong Applied Science and Technology Research Institute Co. Ltd | Efficient lighting |
| TWI461109B (en) * | 2012-05-09 | 2014-11-11 | Delta Electronics Inc | Laser light source module, laser device and lighting method using the same |
-
2002
- 2002-05-23 CN CN 02120603 patent/CN1459927A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007124666A1 (en) * | 2006-04-28 | 2007-11-08 | Hong Kong Applied Science and Technology Research Institute Co. Ltd | Efficient lighting |
| WO2007124665A1 (en) * | 2006-04-28 | 2007-11-08 | Hong Kong Applied Science and Technology Research Institute Co. Ltd | Efficient lighting |
| US7294978B1 (en) | 2006-04-28 | 2007-11-13 | Hong Kong Applied Science And Technology Research Institute Co. Ltd. | Efficient lighting |
| US7586271B2 (en) | 2006-04-28 | 2009-09-08 | Hong Kong Applied Science and Technology Research Institute Co. Ltd | Efficient lighting |
| TWI461109B (en) * | 2012-05-09 | 2014-11-11 | Delta Electronics Inc | Laser light source module, laser device and lighting method using the same |
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