CN203851329U - Power optimal controlled table lamp - Google Patents
Power optimal controlled table lamp Download PDFInfo
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- CN203851329U CN203851329U CN201420191132.2U CN201420191132U CN203851329U CN 203851329 U CN203851329 U CN 203851329U CN 201420191132 U CN201420191132 U CN 201420191132U CN 203851329 U CN203851329 U CN 203851329U
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model provides a power optimal controlled table lamp comprising a power supply, a first voltage generating circuit and a second voltage generating circuit; input ends of the first and second voltage generating circuits are connected with the power supply; output ends of the first and second voltage generating circuits are respectively connected with a first LED array and a second LED array. The power optimal controlled table lamp is provided; when power quantity of a battery is used up or damaged, and two-end voltage is lower than voltage level provided by a bias circuit, a comparator can conduct a short circuit switch, thereby minimizing resistance of the battery loop.
Description
Technical field
The utility model relates to lighting field, particularly a kind of desk lamp.
Background technology
Desk lamp is the necessary lighting device of daily life, and student written industry or reading are read the newspaper all needs desk lamp illumination.LED(light-emitting diode) the desk lamp that appears as brought rapid development, because LED is direct current supply, operating voltage grade is low, brightness is high, therefore, desk lamp generally adopts LED illumination, comes to power to LED by external battery.
But the lighting hours of existing Portable LED desk lamp is limited by battery self reason, lighting hours is short, and light adjusting circuit is realized dividing potential drop shunting by traditional series and parallel compensated resistance device, and then reach the object of light modulation, this mode has been wasted a large amount of electric energy, further shorten battery-powered time, and illumination saltus step in light modulation process, dimming behavior is poor.
Therefore, providing the desk lamp that a kind of duration of power supply is long, dimming behavior is good is current problem demanding prompt solution.
Utility model content
The utility model proposes a kind of desk lamp of power supply optimal control, solved the problem that existing desk lamp power-on time is short, dimming behavior is poor.
The technical solution of the utility model is achieved in that
A kind of desk lamp of power supply optimal control, comprise: power supply, the first voltage generation circuit and second voltage produce circuit, the input that the first voltage generation circuit and second voltage produce circuit is connected to power supply, and the output that the first voltage generation circuit and second voltage produce circuit is connected respectively to the first LED array and the second LED array;
Described the first LED array comprises the LED string that two row are connected in series, described the second LED array also comprises the LED string that two row are connected in series, four LED strings are arranged side by side, and the LED string of the first LED array arranges both sides, and the LED string of the second LED array is arranged on the centre of the first LED array;
Described the first voltage generation circuit comprises:
Transformer, comprise former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to described power supply, secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends;
The first switching tube, its source electrode is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
The first switch driver, comprise the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, the emitter of the first transistor and transistor seconds links together as output, and the collector electrode of the first transistor is connected to power supply, and the collector electrode of transistor seconds is connected to former limit earth potential;
First frequency circuit for generating, comprises the first phase-locked loop, and it is connected to crystal oscillator; The first low pass filter, is connected to the output of the first phase-locked loop; The first voltage controlled oscillator, is connected to the first low pass filter output, and its output is connected to the first amplifier, and the output of the first amplifier is connected to the control end of described the first switch driver;
The first diode, its anodic bonding is to transformer secondary winding first end, and its negative electrode is connected to one end of the first inductor;
The common port of the other end of the first inductor and the first capacitor is connected to the first end of the first LED array, and the other end of the first capacitor is connected to the second end of secondary earth potential and the first LED array;
Described second voltage produces circuit and comprises:
The second inductor, its one end is connected to described power supply;
Second switch pipe and the 3rd switching tube, the source electrode of second switch pipe and the 3rd switching tube links together and is connected to the other end of the second inductor, the drain electrode of second switch pipe is connected to secondary earth potential, the drain electrode of the 3rd switching tube is connected to the second capacitor and the second LED array first end, and the other end of the second capacitor is connected to secondary earth potential and second LED array the second end;
Second switch driver, it is the UC3714 of Texas Instruments chip, and the clock signal based on control end input produces the switching drive signal of two-way complementation, and a road is coupled to described second switch tube grid, and another road is coupled to described the 3rd switching tube grid;
Second frequency circuit for generating, comprises the second phase-locked loop, and it is connected to crystal oscillator; The second low pass filter, is connected to the output of the second phase-locked loop; The second voltage controlled oscillator, be connected to the second low pass filter output, its output is leaded up to frequency multiplier circuit and is fed back to the second phase-locked loop, and another road exports the second amplifier to, and the output of the second amplifier is connected to the control end of described second switch driver;
Described frequency multiplier circuit comprises 3 frequency multipliers, 6 frequency multipliers and 9 frequency multipliers that are connected in parallel, and described 3 frequency multipliers, 6 frequency multipliers and 9 frequency multipliers are connected to the second phase-locked loop by the first by-pass cock, the second by-pass cock and the 3rd by-pass cock respectively;
Described the first by-pass cock, the second by-pass cock and the 3rd by-pass cock are connected with the button on lamp socket;
Described power supply is battery pack, and its voltage is 10-20V, and described battery pack comprises n the battery being connected in series; N the shorting switch being connected in parallel with respective battery; And with n short circuit control circuit of respective battery coupled in parallel, wherein said each short circuit control circuit receives respective battery both end voltage, and provides control signal according to respective battery both end voltage, in order to by corresponding shorting switch conducting or disconnection; Described short circuit control circuit comprises: comparator, has in-phase input end, inverting input and output; Biasing circuit, has anode and negative terminal, and its anode is coupled to the in-phase input end of comparator; Wherein said battery and shorting switch coupled in parallel are between the in-phase input end of comparator and the negative terminal of biasing circuit, and described shorting switch comprises the control end that is coupled to described comparator output terminal; Described shorting switch is mosfet transistor.
Alternatively, described the first switching tube, second switch pipe and the 3rd switching tube are mosfet transistor.
Alternatively, described crystal oscillator frequency of oscillation is 100MHz.
The beneficial effects of the utility model are:
(1) first LED array is permanent bright array, and base lighting is provided, and the second LED array is light modulation array, by the adjusting of frequency signal being changed to the brightness of the second LED array, and then the brightness of adjusting lamp group;
(3) output of voltage generation circuit has capacitor, and the voltage on capacitor can not suddenly change, and therefore the brightness of lamp group slowly changes;
(3) when the electric weight of battery exhausts or damages, while making voltage levvl that its both end voltage provides lower than biasing circuit, comparator is shorting switch conducting, thereby minimizes the resistance of this battery path.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit diagram of the desk lamp of the utility model power supply optimal control;
Fig. 2 is the structural representation of the first LED array and the second LED array in Fig. 1;
Fig. 3 is the circuit diagram of power supply in Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the desk lamp of a kind of power supply optimal control of the present utility model, comprise: power supply 1, the first voltage generation circuit 10 and second voltage produce circuit 20, the output that the input of the first voltage generation circuit 10 and second voltage generation circuit 20 is connected to power supply 1, the first voltage generation circuit 10 and second voltage generation circuit 20 is connected respectively to the first LED array 80 and the second LED array 90.
Particularly, described the first voltage generation circuit 10 comprises: transformer 11, comprise former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to described power supply 1, and secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends; The first switching tube 12, its source electrode is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver 13; The first switch driver 13, comprise the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, the emitter of the first transistor and transistor seconds links together as output, and the collector electrode of the first transistor is connected to power supply 1, and the collector electrode of transistor seconds is connected to former limit earth potential; First frequency circuit for generating 30, comprises the first phase-locked loop 31, and it is connected to crystal oscillator 100; The first low pass filter 32, is connected to the output of the first phase-locked loop 31; The first voltage controlled oscillator 33, is connected to the first low pass filter 32 outputs, and its output is connected to the output output first frequency signal f1 of the first amplifier 35, the first amplifiers 35 and is connected to the control end of described the first switch driver 13.The first diode 14, its anodic bonding is to transformer secondary winding first end, and its negative electrode is connected to the first inductor 15; The common port of the first inductor 15 and the first capacitor 16 is connected to the first end of the first LED circuit 80, and the other end of the first capacitor 16 is connected to the second end of secondary earth potential and the first LED array 80.
Described second voltage produces circuit 20 and comprises: the second inductor 21, and its one end is connected to described power supply 1; Second switch pipe 22 and the 3rd switching tube 23, the source electrode of second switch pipe 22 and the 3rd switching tube 23 links together and is connected to the other end of the second inductor 21, the drain electrode of second switch pipe 22 is connected to secondary earth potential, the drain electrode of the 3rd switching tube 23 is connected to the first end of the second LED array 90 and the other end of the second capacitor 25, the second capacitors 25 and is connected to the second end of secondary earth potential and the second LED array 90; Second switch driver 24, it is the UC3714 of Texas Instruments chip, clock signal based on control end input produces the switching drive signal of two-way complementation, and a road is coupled to described second switch pipe 22 grids, and another road is coupled to described the 3rd switching tube 23 grids; Second frequency circuit for generating 40, comprises the second phase-locked loop 41, and it is connected to crystal oscillator 100; The second low pass filter 42, is connected to the output of the second phase-locked loop 41; The second voltage controlled oscillator 43, be connected to the second low pass filter 42 outputs, its output is leaded up to frequency multiplier circuit and is fed back to the second phase-locked loop 41, another road exports the output output second frequency signal f2 of the second amplifier 45, the second amplifiers 45 to and is connected to the control end of described second switch driver 24.Described frequency multiplier circuit comprises that 3 frequency multiplier 45,6 frequency multiplier 46 and 9 frequency multiplier 47,3 frequency multipliers, 6 frequency multipliers and 9 frequency multipliers that are connected in parallel are connected to the second phase-locked loop 41 by the first by-pass cock 51, the second by-pass cock 52 and the 3rd by-pass cock 53 respectively; Described the first by-pass cock 51, the second by-pass cock 52 are connected with the button on lamp socket with the 3rd by-pass cock 53, on button, mark has brightness value, for example 1,2,3 grade, by the turn-on and turn-off of the corresponding by-pass cock of button control of operation lamp socket, control second frequency signal f2, realize the adjusting that second voltage produces circuit 20 output voltages, and then regulate the temperature of the second LED array 90.
As shown in Figure 2, described the first LED array 80 comprises the LED string that two row are connected in series, described the second LED array 90 also comprises the LED string that two row are connected in series, four LED strings are arranged side by side, the LED string of the first LED array is arranged on both sides, and the LED string of the second LED array is arranged on the centre of the first LED array.The first LED array 90 is connected between the first voltage generation circuit 10 and earth potential, and first frequency signal f1 is steady state value, and the output voltage of the first voltage generation circuit 10 is steady state value, and therefore the first LED array 90 is permanent bright array, and base lighting is provided; The second LED array is light modulation array, by the adjusting of frequency signal f2 being changed to the brightness of the second LED array, and then the brightness of adjusting lamp group.And the output of the first voltage generation circuit 10 has capacitor 16, the output that second voltage produces circuit 20 has capacitor 25, and the voltage on capacitor can not suddenly change, and therefore the brightness of lamp group slowly changes.
As shown in Figure 3, power supply 1 is battery pack 117, and its voltage is 10-20V, battery pack comprise the battery that n is connected in series (211,221 ..., 2n1), wherein n is natural number; N shorting switch being connected in parallel with respective battery (212,222 ..., 2n2); And with n short circuit control circuit of respective battery coupled in parallel (213,223 ..., 2n3), described each short circuit control circuit receives respective battery both end voltage, and provide control signal according to respective battery both end voltage, in order to by corresponding shorting switch conducting or disconnection, thus in the time that respective battery both end voltage is very low by this battery short circuit.Short circuit control circuit in Fig. 3 (213,223 ..., 2n3) structure is identical, short circuit control circuit 213 comprises: comparator 2101, has in-phase input end, inverting input and output; Biasing circuit 2102, has anode and negative terminal, and its anode is coupled to the in-phase input end of comparator 2101; Wherein battery 211 and shorting switch 212 coupled in parallel are between the in-phase input end of comparator 2101 and the negative terminal of biasing circuit 102, and described shorting switch 212 comprises the control end that is coupled to described comparator 2101 outputs.In the time that described battery voltage short circuit control circuit 213 moves, the voltage that comparator 2101 its battery 211 both end voltage of comparison and biasing circuit 2102 provide.When the power supply of battery 211 exhausts or damages, while making voltage levvl that its both end voltage provides lower than biasing circuit 2102, comparator 2101 is shorting switch 212 conductings, with short circuit battery 211, thereby minimizes the resistance of this battery path.Described shorting switch can be the full-control type such as triode, mosfet transistor transistor.
In the utility model, the no-load voltage ratio of transformer is 1:1, realizes former secondary electrical isolation.
Preferably, described the first switching tube 12, second switch pipe 22 and the 3rd switching tube 23 are mosfet transistor.
Preferably, the frequency of oscillation of described crystal oscillator 100 is 100MHz.
Desk lamp of the present utility model, the first LED array is permanent bright array, and base lighting is provided, the second LED array is light modulation array, by the adjusting of frequency signal being changed to the brightness of the second LED array, and then the brightness of adjusting lamp group; The output of voltage generation circuit has capacitor, and the voltage on capacitor can not suddenly change, and therefore the brightness of lamp group slowly changes; When the electric weight of battery exhausts or damages, while making voltage levvl that its both end voltage provides lower than biasing circuit, comparator is shorting switch conducting, thereby minimizes the resistance of this battery path.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (3)
1. the desk lamp of a power supply optimal control, it is characterized in that, comprise: power supply, the first voltage generation circuit and second voltage produce circuit, the input that the first voltage generation circuit and second voltage produce circuit is connected to power supply, and the output that the first voltage generation circuit and second voltage produce circuit is connected respectively to the first LED array and the second LED array;
Described the first LED array comprises the LED string that two row are connected in series, described the second LED array also comprises the LED string that two row are connected in series, four LED strings are arranged side by side, and the LED string of the first LED array arranges both sides, and the LED string of the second LED array is arranged on the centre of the first LED array;
Described the first voltage generation circuit comprises:
Transformer, comprise former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to described power supply, secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends;
The first switching tube, its source electrode is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
The first switch driver, comprise the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, the emitter of the first transistor and transistor seconds links together as output, and the collector electrode of the first transistor is connected to power supply, and the collector electrode of transistor seconds is connected to former limit earth potential;
First frequency circuit for generating, comprises the first phase-locked loop, and it is connected to crystal oscillator; The first low pass filter, is connected to the output of the first phase-locked loop; The first voltage controlled oscillator, is connected to the first low pass filter output, and its output is connected to the first amplifier, and the output of the first amplifier is connected to the control end of described the first switch driver;
The first diode, its anodic bonding is to transformer secondary winding first end, and its negative electrode is connected to one end of the first inductor;
The common port of the other end of the first inductor and the first capacitor is connected to the first end of the first LED array, and the other end of the first capacitor is connected to the second end of secondary earth potential and the first LED array;
Described second voltage produces circuit and comprises:
The second inductor, its one end is connected to described power supply;
Second switch pipe and the 3rd switching tube, the source electrode of second switch pipe and the 3rd switching tube links together and is connected to the other end of the second inductor, the drain electrode of second switch pipe is connected to secondary earth potential, the drain electrode of the 3rd switching tube is connected to the second capacitor and the second LED array first end, and the other end of the second capacitor is connected to secondary earth potential and second LED array the second end;
Second switch driver, it is the UC3714 of Texas Instruments chip, and the clock signal based on control end input produces the switching drive signal of two-way complementation, and a road is coupled to described second switch tube grid, and another road is coupled to described the 3rd switching tube grid;
Second frequency circuit for generating, comprises the second phase-locked loop, and it is connected to crystal oscillator; The second low pass filter, is connected to the output of the second phase-locked loop; The second voltage controlled oscillator, be connected to the second low pass filter output, its output is leaded up to frequency multiplier circuit and is fed back to the second phase-locked loop, and another road exports the second amplifier to, and the output of the second amplifier is connected to the control end of described second switch driver;
Described frequency multiplier circuit comprises 3 frequency multipliers, 6 frequency multipliers and 9 frequency multipliers that are connected in parallel, and described 3 frequency multipliers, 6 frequency multipliers and 9 frequency multipliers are connected to the second phase-locked loop by the first by-pass cock, the second by-pass cock and the 3rd by-pass cock respectively;
Described the first by-pass cock, the second by-pass cock and the 3rd by-pass cock are connected with the button on lamp socket;
Described power supply is battery pack, and its voltage is 10-20V, and described battery pack comprises n the battery being connected in series; N the shorting switch being connected in parallel with respective battery; And with n short circuit control circuit of respective battery coupled in parallel, wherein said each short circuit control circuit receives respective battery both end voltage, and provides control signal according to respective battery both end voltage, in order to by corresponding shorting switch conducting or disconnection; Described short circuit control circuit comprises: comparator, has in-phase input end, inverting input and output; Biasing circuit, has anode and negative terminal, and its anode is coupled to the in-phase input end of comparator; Wherein said battery and shorting switch coupled in parallel are between the in-phase input end of comparator and the negative terminal of biasing circuit, and described shorting switch comprises the control end that is coupled to described comparator output terminal; Described shorting switch is mosfet transistor.
2. the desk lamp of power supply optimal control as claimed in claim 1, is characterized in that, described the first switching tube, second switch pipe and the 3rd switching tube are mosfet transistor.
3. the desk lamp of power supply optimal control as claimed in claim 1, is characterized in that, described crystal oscillator frequency of oscillation is 100MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420191132.2U CN203851329U (en) | 2014-04-18 | 2014-04-18 | Power optimal controlled table lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420191132.2U CN203851329U (en) | 2014-04-18 | 2014-04-18 | Power optimal controlled table lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203851329U true CN203851329U (en) | 2014-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420191132.2U Expired - Fee Related CN203851329U (en) | 2014-04-18 | 2014-04-18 | Power optimal controlled table lamp |
Country Status (1)
| Country | Link |
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| CN (1) | CN203851329U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388337A (en) * | 2015-12-05 | 2016-03-09 | 青岛盛嘉信息科技有限公司 | Sinusoidal signal generating device |
| CN105445510A (en) * | 2015-11-26 | 2016-03-30 | 青岛盛嘉信息科技有限公司 | Signal generation device |
| CN105548624A (en) * | 2015-12-02 | 2016-05-04 | 青岛盛嘉信息科技有限公司 | Sine wave generation circuit with adjustable frequency |
| CN105548625A (en) * | 2015-12-05 | 2016-05-04 | 青岛盛嘉信息科技有限公司 | Sinusoidal signal source |
-
2014
- 2014-04-18 CN CN201420191132.2U patent/CN203851329U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445510A (en) * | 2015-11-26 | 2016-03-30 | 青岛盛嘉信息科技有限公司 | Signal generation device |
| CN105548624A (en) * | 2015-12-02 | 2016-05-04 | 青岛盛嘉信息科技有限公司 | Sine wave generation circuit with adjustable frequency |
| CN105388337A (en) * | 2015-12-05 | 2016-03-09 | 青岛盛嘉信息科技有限公司 | Sinusoidal signal generating device |
| CN105548625A (en) * | 2015-12-05 | 2016-05-04 | 青岛盛嘉信息科技有限公司 | Sinusoidal signal source |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20170418 |
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| CF01 | Termination of patent right due to non-payment of annual fee |