CN103298194A - Lighting device - Google Patents

Lighting device Download PDF

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Publication number
CN103298194A
CN103298194A CN2012101596268A CN201210159626A CN103298194A CN 103298194 A CN103298194 A CN 103298194A CN 2012101596268 A CN2012101596268 A CN 2012101596268A CN 201210159626 A CN201210159626 A CN 201210159626A CN 103298194 A CN103298194 A CN 103298194A
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CN
China
Prior art keywords
led light
light string
lighting device
power switch
transistor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012101596268A
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Chinese (zh)
Inventor
魏庆德
黄翰廷
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SONGHONG TECHNOLOGY Co Ltd
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SONGHONG TECHNOLOGY Co Ltd
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Publication date
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Publication of CN103298194A publication Critical patent/CN103298194A/en
Pending legal-status Critical Current

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    • Y02B20/346

Abstract

A lighting device includes a power switcher, a first light emitting diode string light and a second light emitting diode string light circuit. The power switcher is respectively electrically connected with the first light emitting diode string light and the second light emitting diode string light circuit. The second light emitting diode string light circuit includes a charge-discharge unit and a second light emitting diode string light being different from the first light emitting diode string light. The lighting device has a first lighting state and a second lighting state, wherein the power switcher supplies power to the first light emitting diode string light in the first lighting state, and the charge-discharge unit supplies power to the second light emitting diode string light in the second lighting state. The lighting device has the light-off delay effect for turning from the first lighting state to the second lighting state to assist lighting spatial profile.

Description

Lighting device
Technical field
The present invention relates to a kind of lighting device, refer to a kind of lighting device with the light effect that postpones to go out especially.
Background technology
In recent years, flourish along with semiconductor science and technology, light-emitting diode (Light Emitting Diode, LED) manufacturing technology also reaches its maturity, present light-emitting diode has been enough to use as the light source of illumination, power saving, volume are little because light-emitting diode possesses, long service life, stable height, residual optical activity is low and height is lit a lamp characteristic such as replys, therefore, develop the lumination of light emitting diode module that to be enough to replace fluorescent tube at present, more market is accepted, even the trend that replaces conventional bulb or fluorescent tube has been arranged.
For example announce in M380425 number in the TaiWan, China patent of invention, a kind of LED lighting device is namely proposed, by in conjunction with loam cake, bottom and Bian Gai, do not influencing the technique effect that the illumination prerequisite is issued to the protective that improves the LED light emitting module, and then replacing conventional bulb or fluorescent tube.
Yet, light-emitting diode is owing to residual optical activity on characteristic is low, in case be applied to lighting device, after light extinguishes because moment complete dull thread can lighting environment, cause environment too dark, human eye can't the identification environment in the short time, if carry out activity at this moment, is very easy to cause unexpected generation, therefore the inconvenience that still has the misgivings on the safety and use is so there is necessity of improvement.
Summary of the invention
Main purpose of the present invention is to solve the known luminescence diode illuminating device, and effective residual light can't be provided after closing, and causes environment too dark, and human eye can't the identification environment, is easy to generate accident, causes the problem of the misgivings on the inconvenient and safety in the use.
For reaching above-mentioned purpose, the invention provides a kind of lighting device with the light effect that postpones to go out, include a power switch, one first LED light string and one second LED light string circuit.This power switch and this first LED light string electrically connect, this second LED light string circuit and this power switch electrically connect, and comprise a charge/discharge unit that electrically connects with this power switch and one with second LED light string of this charge/discharge unit electric connection, this second LED light string has one and is different from the photochromic of this first LED light string.
Wherein this lighting device have one by this power switch respectively to the charging of this charge/discharge unit and to first illumination condition of this first LED light string power supply, and one by this power switch stop power supply and this charge/discharge unit to second illumination condition of this second LED light string power supply, and send in this second illumination condition and to differ from the photochromic of this first illumination condition.
By technique scheme, the present invention has following advantage at least:
One, switched to when stopping power supply state by power supply state in this power switch, the present invention can transfer this second illumination condition to by this first illumination condition, and provided the lights of several seconds to a few hours by this second LED light string, produce one and postpone to go out light effect, with the lighting space profile, make things convenient for the user to pick out correct direction, leave former having living space.
Two, this second illumination condition of the present invention sends and is different from the photochromic of this first illumination condition, makes the conversion between this first illumination condition of user's easy identification and this second illumination condition, and can feel at ease to leave former having living space after this power switch is closed.
Description of drawings
Figure 1A is the structure configuration schematic diagram of first embodiment of the invention.
Figure 1B is the circuit diagram of first embodiment of the invention.
Fig. 2 A is the structure configuration schematic diagram of second embodiment of the invention.
Fig. 2 B-Fig. 2 D is respectively the circuit diagram one to three of second embodiment of the invention.
Fig. 3 A is the structure configuration schematic diagram of third embodiment of the invention.
Fig. 3 B-Fig. 3 D is respectively the circuit diagram one to three of third embodiment of the invention.
Fig. 4 is the structure configuration schematic diagram of fourth embodiment of the invention.
Fig. 5 is the structure configuration schematic diagram of fifth embodiment of the invention.
Embodiment
Relevant detailed description of the present invention and technology contents now just cooperate graphic being described as follows:
Please arrange in pairs or groups and consult shown in Figure 1A and Figure 1B, Figure 1A is the structure configuration schematic diagram of first embodiment of the invention, Figure 1B is the circuit diagram of first embodiment of the invention, in this embodiment, the invention provides a kind of lighting device with the light effect that postpones to go out, include a power switch 10, one first LED light string 20 and one second LED light string circuit 30.This power switch 10 electrically connects with this first LED light string 20, and can adopt the switching power converter of various different frameworks, and this first LED light string 20 is formed by a plurality of light-emitting diode serial connections.This second LED light string circuit 30 electrically connects with this power switch 10, in this embodiment, this power switch 10, this first LED light string 20 and this second LED light string circuit 30 form a common contact, this second LED light string circuit 30 comprise a charge/discharge unit 31 that electrically connects with this power switch 10 and one with second LED light string 32 of these charge/discharge unit 31 electric connections, this second LED light string 32 is formed by a plurality of light-emitting diode serial connections, and has a photochromic and luminous intensity that is different from this first LED light string 20, what further specify is, this different photochromic and luminous intensity for refer to the user can this first LED light string 31 of naked eyes identification and this second LED light string 32 between the light source that sends be inequality.
In this embodiment, this charge/discharge unit 31 comprises one first diode 311, one first capacitor 312, one first Zener diode 313 and one first resistor 314, the anode of this first diode 311 is connected to this power switch 10, this first capacitor 312 is connected with the negative electrode of this first diode 311, this first Zener diode 313 is connected with the negative electrode of this first diode 311, and an end of this first resistor 314 is connected with the negative electrode of this first diode 311 and the other end is connected with this second LED light string 32.
So, after the source power supply conducting, this lighting device is lighted this first LED light string 20 under the driving of power converter, in this embodiment, this first LED light string 20 sends a white light, and with the brightness of this white light as this lighting device key lighting, and the direct voltage of this first LED light string 20 is through this first diode 311, this first capacitor 312 is charged in the short time at the utmost point, the purpose of these first capacitor, 312 these first Zener diodes 313 in parallel is to fix the magnitude of voltage of this first capacitor 312, guarantee that be fixing discharge time each time, this is first illumination condition of this lighting device.
After the user cuts off source power supply, the brightness of this first LED light string 20 is extinguished, 312 pairs of these first resistors of this first capacitor this moment 314 and these second LED light string, 32 discharges, light this second LED light string 32, this second LED light string 32 sends the photochromic and luminous intensity that is different from this first LED light string 20, in this embodiment, sending a blue green light with this second LED light string 32 is example with other this white light in this first LED light string 20, but not as limit, time kept in the time of several seconds to a few hours, finish up to these first capacitor, 312 discharges, this is second illumination condition of this lighting device.What remark additionally is, connect the purpose of this first resistor 314 for working as current-limiting resistance, then determined by the impedance of this first capacitor 312 with this second LED light string 32 discharge time, and this first capacitor 312 replaceable be a ultracapacitor or a rechargeable battery.
By RC circuit charge-discharge principle as can be known, the current value of discharge presents the exponential type discharge, the size of current value is different in time, cause light secretly too fierce by bright commentaries on classics in discharge time, therefore in order to solve the different problems of current value, reintroduce second embodiment shown in Fig. 2 A to Fig. 2 D, Fig. 2 A is the structure configuration schematic diagram of second embodiment of the invention, Fig. 2 B to Fig. 2 D is respectively the circuit diagram one to three of second embodiment of the invention, in a second embodiment, with first embodiment in comparison, it is characterized in that this second LED light string circuit 30 also comprises a voltage regulation unit 33 that electrically connects with this charge/discharge unit 31, in Fig. 2 B, this voltage regulation unit 33 can comprise one second resistor 331, one the first transistor 332, one transistor seconds 333 and one the 3rd resistor 334, one end of this second resistor 331 is connected with this charge/discharge unit 31 and the other end is connected with the base stage of this first transistor 332, this the first transistor 332 is connected with this second LED light string 32 with collector, this transistor seconds 333 is connected with the base stage of this first transistor 332 with collector and is connected with the emitter-base bandgap grading of base stage with this first transistor 332, and an end of the 3rd resistor 334 is connected in the base stage of this transistor seconds 333 and the other end is connected in emitter-base bandgap grading and the ground connection of this transistor seconds 333.
So, after the user cuts off source power supply, the brightness of this first LED light string 20 is extinguished, 32 discharges of 312 pairs of these second LED light strings of this first capacitor this moment, light this second LED light string 32, because the base stage of this first transistor 332 and emitter-base bandgap grading are connected to the 3rd resistor 334, the base stage of this first transistor 332 and the voltage of emitter-base bandgap grading are fixed voltage value, so the electric current of the 3rd resistor 334 of flowing through is fixed value, make that the collected current of this first transistor 332 is fixed value, then the electric current of this second LED light string 32 is fixed, luminous intensity is also fixing, be this second illumination condition this moment, time kept in the time of several seconds to a few hours, be lower than the forward bias voltage drop of this second LED light string 32 up to these first capacitor, 312 discharge voltages, the current value of discharge presents the exponential type discharge, finishes up to discharge.
Again in Fig. 2 C, this voltage regulation unit 33 can comprise one second resistor 331, one the first transistor 332, one second diode 335, one the 3rd diode 336 and one the 3rd resistor 334, one end of this second resistor 331 is connected with this charge/discharge unit 31 and the other end is connected with the base stage of this first transistor 332, this the first transistor 332 is connected with this second LED light string 32 with collector, this second diode 335 is connected with the base stage of anode with this first transistor 332, the 3rd diode 336 is connected with the negative electrode of anode with this second diode 335, and an end of the 3rd resistor 334 connects the emitter-base bandgap grading of this first transistor 332 and the other end is connected in negative electrode and the ground connection of the 3rd diode 336.Its operation principle is as described below, the forward bias voltage drop of supposing this second diode 335 is identical with the emitter-base bandgap grading forward bias voltage drop with the base stage of this first transistor 332, this second diode 335 offsets with base stage and the emitter-base bandgap grading forward bias voltage drop of this first transistor 332, the forward bias voltage drop equivalence of the 3rd diode 336 is connected to the 3rd resistor 334, so the electric current of the 3rd resistor 334 of flowing through is fixed value, make that the collected current of this first transistor 332 is fixed value, the electric current of this second LED light string 32 is fixed, luminous intensity is also fixing, be this second illumination condition this moment, time kept in the time of several seconds to a few hours, be lower than the forward bias voltage drop of this second LED light string 32 up to these first capacitor, 312 discharge voltages, the current value of discharge presents the exponential type discharge, finishes up to discharge.
And in Fig. 2 D, this voltage regulation unit 33 can comprise one second resistor 331, one the first transistor 332, one second Zener diode 337 and one the 3rd resistor 334, one end of this second resistor 331 is connected with this charge/discharge unit 31 and the other end is connected with the base stage of this first transistor 332, this the first transistor 332 is connected with this second LED light string 32 with collector, this second Zener diode 337 is connected with the base stage of negative electrode with this first transistor 332, and an end of the 3rd resistor 334 is connected in the emitter-base bandgap grading of this first transistor 332 and the other end is connected in anode and the ground connection of this second Zener diode 337.Its operation principle is as described below, the base stage of the reverse bias of this second Zener diode 337 and this first transistor 332 and emitter-base bandgap grading forward bias voltage drop are all fixed voltage value, the reverse bias of this second Zener diode 337 deducts base stage and the emitter-base bandgap grading forward bias voltage drop of this first transistor 332, remaining reverse bias equivalence is connected to the 3rd resistor 334, so the electric current of the 3rd resistor 334 of flowing through is fixed value, make that the collected current of this first transistor 332 is fixed value, the electric current of this second LED light string 32 is fixed, luminous intensity is also fixing, be this second illumination condition this moment, time kept in the time of several seconds to a few hours, be lower than the forward bias voltage drop of this second LED light string 32 up to these first capacitor, 312 discharge voltages, the current value of discharge presents the exponential type discharge, finishes up to discharge.
Moreover, consider the wavelength of this first LED light string 20 and this second LED light string 32, colour temperature, the color difference, can influence original light characteristic if light simultaneously, further design is when this first LED light string 20 is lighted, this second LED light string 32 is for extinguishing, when this first LED light string 20 extinguishes, this second LED light string 32 can be lighted, please arrange in pairs or groups and consult shown in Fig. 3 A to Fig. 3 D, Fig. 3 A is the structure configuration schematic diagram of third embodiment of the invention, Fig. 3 B to Fig. 3 D is respectively the circuit diagram one to three of third embodiment of the invention, in the 3rd embodiment, with second embodiment in comparison, it is characterized in that this second LED light string circuit 30 also comprises a partial pressure unit 34 that electrically connects with this power switch 10, this partial pressure unit 34 also electrically connects with this voltage regulation unit 33, this partial pressure unit 34 comprises one the 3rd Zener diode 341 at this, one the 4th resistor 342, one the 3rd transistor 343 and one the 5th resistor 344, in Fig. 3 B to Fig. 3 D, the 3rd Zener diode 341 is connected with this power switch 10 with negative electrode, one end of the 4th resistor 342 is connected with the anode of the 3rd Zener diode 341 and the other end is connected with the base stage of the 3rd transistor 343, the collector of the 3rd transistor 343 is connected with the base stage of this first transistor 332, and an end of the 5th resistor 344 is connected with the base stage of the 3rd transistor 343 and the other end is connected with the emitter-base bandgap grading of the 3rd transistor 343 and ground connection.
Accordingly, when this first LED light string 20 is lighted, the 4th resistor 342 and the 5th resistor 344 dividing potential drops, make the 3rd transistor 343 be operated in conducting state, make the base stage of this first transistor 332 hold with being connected to, this the first transistor 332 is operated in cut-off state, these second LED light string, 32 no currents flow into can be not luminous, do not influence the light characteristic of this first LED light string 20, this first capacitor 312 has been full of electric charge at certain hour simultaneously, when mains switch is cut off or electric power system when having a power failure, the 4th resistor 342 and the 5th resistor 344 absence of voltage, the 3rd transistor 343 is operated in cut-off state, the base stage of this first transistor 332 is no longer held with being connected to, this the first transistor 332 is operated in conducting state, and operation principle is afterwards then distinguished among corresponding second embodiment, the explanation of Fig. 2 B to Fig. 2 D.What also need replenish is, the circuit that relevant the first transistor 332, transistor seconds 333 and the 3rd transistor 343 are formed in above-described embodiment, this for NPN transistor for illustrating, but not as limit, also replaceable is by PNP transistor or the formed equivalent electric circuit of power switch component of mos field effect transistor (MOSFET).
Moreover, this second LED light string circuit 30 also can change to the coil supply direct voltage source by transformer, see also shown in Figure 4, structure configuration schematic diagram for fourth embodiment of the invention, in the 4th embodiment, with first embodiment in comparison, this second LED light string circuit 30 also comprises a voltage transformation unit 35, this charge/discharge unit 31 electrically connects by this voltage transformation unit 35 and this power switch 10, this voltage transformation unit 35 can be repeatedly lateral coil of a transformer, and be connected in the anode of this first diode 311 among above-mentioned first embodiment or this second embodiment, this first diode 311 is connected to this power switch 10 by this voltage transformation unit 35, and directly provides voltage source by this voltage transformation unit 35.
In addition, this second LED light string circuit 30 also can change to by the circuit that contains direct voltage direct voltage source is provided, see also shown in Figure 5, structure configuration schematic diagram for fifth embodiment of the invention, in the 5th embodiment, with first embodiment in comparison, this lighting device also comprises a dc power supply unit 40 that electrically connects with this power switch 10, this dc power supply unit 40 is in parallel with this second LED light string circuit 30, this dc power supply unit 40 can be the capacitor of a voltage stabilizing, directly provide voltage source by this capacitor, this dc power supply unit 40 can be applicable among second embodiment equally.
What will remark additionally at last is, above-mentioned this power switch 10, this first LED light string 20, this second LED light string circuit 30 and this dc power supply unit 40, all be arranged on the same circuit board, and by covering with a lampshade cover, and form this lighting device, so this lighting device can be applicable to the various light fixtures of bulb, fluorescent tube, Recessed light, Frame lamp, Emergency Light lamp, mini light night.
In sum, because the present invention is switched to when stopping power supply state by power supply state in this power switch, can transfer this second illumination condition to by this first illumination condition, and provided the lights of several seconds to a few hours by this second LED light string, produce one and postpone to go out light effect, with the lighting space profile, make things convenient for the user to pick out correct direction, leave former having living space, has the advantage that promotes the light fixture safety in utilization, moreover, this second illumination condition of the present invention sends and is different from the photochromic of this first illumination condition, make the conversion between this first illumination condition of user's easy identification and this second illumination condition, and after closing, this power switch can feel at ease to leave former having living space, avoid not having between this first illumination condition of user's misidentification and this second illumination condition and switch, last, the present invention also has simple structure, low and the demand that meets the light-emitting diode constant-current circuit of cost.
Below the present invention is described in detail, yet the above person only is a preferred embodiment of the present invention, when not limiting scope of the invention process.Be that all equalizations of doing according to the present patent application scope change and modify etc., all should still belong in the patent covering scope of the present invention.

Claims (6)

1. a lighting device is characterized in that, includes:
One power switch;
One first LED light string that electrically connects with described power switch; And
The one second LED light string circuit that electrically connects with described power switch, the described second LED light string circuit comprise a charge/discharge unit that electrically connects with described power switch and one with second LED light string of described charge/discharge unit electric connection, described second LED light string has one and is different from the photochromic of described first LED light string;
Wherein, described lighting device have one by described power switch respectively to the charging of described charge/discharge unit and to first illumination condition of described first LED light string power supply, and one by described power switch stop power supply and described charge/discharge unit to second illumination condition of described second LED light string power supply, and at described second illumination condition, photochromic when the light that described lighting device sends photochromic is different from described first illumination condition.
2. lighting device according to claim 1 is characterized in that, the described second LED light string circuit also comprises a voltage regulation unit that electrically connects with described charge/discharge unit.
3. lighting device according to claim 2 is characterized in that, the described second LED light string circuit also comprises a partial pressure unit that electrically connects with described power switch, described partial pressure unit and the electric connection of described voltage regulation unit.
4. lighting device according to claim 1 is characterized in that, the described second LED light string circuit also comprises a voltage transformation unit, and described charge/discharge unit electrically connects by described voltage transformation unit and described power switch.
5. lighting device according to claim 1 is characterized in that, also comprises a dc power supply unit that electrically connects with described power switch, and described dc power supply unit is in parallel with the described second LED light string circuit.
6. lighting device according to claim 1, it is characterized in that, described second LED light string has a luminous intensity that is different from described first LED light string, and when described second illumination condition, the luminous intensity the when luminous intensity of the light that described lighting device sends is different from described first illumination condition.
CN2012101596268A 2012-03-05 2012-05-21 Lighting device Pending CN103298194A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW101107264A TW201338622A (en) 2012-03-05 2012-03-05 Illumination device having delayed light off effect
TW101107264 2012-03-05

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CN103298194A true CN103298194A (en) 2013-09-11

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CN2012101596268A Pending CN103298194A (en) 2012-03-05 2012-05-21 Lighting device

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CN (1) CN103298194A (en)
TW (1) TW201338622A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI474760B (en) * 2012-07-20 2015-02-21 Nec Lighting Ltd Led lamp
TWI558586B (en) * 2014-01-09 2016-11-21 Kwang Yang Motor Co Lighting delay system for electric vehicles
JP7052004B2 (en) * 2018-02-23 2022-04-11 新電元工業株式会社 Vehicle LED lighting control circuit, vehicle LED lighting control device, and vehicle LED lighting control circuit control method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006351473A (en) * 2005-06-20 2006-12-28 Fuchu Tempearl:Kk Circuit for turning on light source and night-light or indicator lamp using circuit for turning on light source
CN1972544A (en) * 2005-11-25 2007-05-30 斯坦雷电气株式会社 Lighting lamp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2984797B2 (en) * 1990-08-17 1999-11-29 日立照明株式会社 Lighting device
US6617746B1 (en) * 2001-10-01 2003-09-09 Wavecrest Laboratories, Llc Rotary electric motor having axially aligned stator poles and/or rotor poles
JP4796849B2 (en) * 2006-01-12 2011-10-19 日立アプライアンス株式会社 DC power supply, light-emitting diode power supply, and lighting device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006351473A (en) * 2005-06-20 2006-12-28 Fuchu Tempearl:Kk Circuit for turning on light source and night-light or indicator lamp using circuit for turning on light source
CN1972544A (en) * 2005-11-25 2007-05-30 斯坦雷电气株式会社 Lighting lamp

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JP2013187188A (en) 2013-09-19

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Application publication date: 20130911