CN103298192A - Lighting device - Google Patents
Lighting device Download PDFInfo
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- CN103298192A CN103298192A CN2012100547993A CN201210054799A CN103298192A CN 103298192 A CN103298192 A CN 103298192A CN 2012100547993 A CN2012100547993 A CN 2012100547993A CN 201210054799 A CN201210054799 A CN 201210054799A CN 103298192 A CN103298192 A CN 103298192A
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- lighting device
- emitting diode
- light
- infrared
- control signal
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Abstract
The invention provides a lighting device which comprises an infrared ray emitting circuit, an infrared ray receiving circuit, at least one light emitting diode and a light emitting diode drive circuit. The infrared ray emitting circuit emits infrared rays to the outer portion of the lighting device. The infrared ray receiving circuit receives the infrared rays which are reflected by external objects of the lighting device, and outputs a control signal according to energy strength change of the received reflected infrared rays. The light emitting diode drive circuit adjusts the brightness of the light emitting diode according to the strength of the control signal.
Description
Technical field
The invention relates to a kind of circuit design of lighting device, and particularly relevant for a kind of light emitting diode illuminating apparatus.
Background technology
Recently, (relevant luminosity and luminous efficiency increase constantly, and the range of application of light-emitting diode is more and more universal for light emitting diode, manufacturing technology lifting LED) along with light-emitting diode.
Light fixture traditionally is to utilize switch to light.When unmanned place of using and light fixture can cause the waste of power supply when bright as perseverance.Therefore at present the light fixture that also has begins to install additional the not striking sensing apparatus of price, this plug-in sensing apparatus be according to whether the someone near the time, make the brightness of light fixture can be entirely bright or go out entirely automatically.Yet because use sensing apparatus also need comprise the integrated circuit of control usefulness, therefore the circuit of integral body is bulky, if when old light fixture will install sensing apparatus with relevant controller additional, certainly will need to transform the cost of light fixture.Therefore, the light fixture of known framework is quite expensive in cost and utilization.
Summary of the invention
In view of this, the present invention proposes a kind of lighting device, so as to solving the problem that prior art is addressed.
The present invention proposes a kind of lighting device, comprises an infrared transmitter, an infrared radiation receiving circuit, at least one light-emitting diode and a LED driving circuit.Infrared transmitter is in order to launch infrared ray and an infrared radiation scope is provided.Infrared radiation receiving circuit is corresponding to the infrared transmitter setting, the infrared ray that reflects in order to the exterior object in the receiving infrared-ray range of exposures, and export a control signal accordingly according to strong and weak variation of the energy of the reflected infrared ray that receives.LED driving circuit is coupled between infrared radiation receiving circuit and the light-emitting diode, adjusts the brightness of light-emitting diode according to the power of control signal.
Wherein infrared transmitter, infrared radiation receiving circuit, light-emitting diode and LED driving circuit have the combination of a plurality of passive components, active element or passive component and active element, and are disposed in a bulb lamp shell or the cast lamp housing.
Wherein when exterior object moved in the infrared radiation scope that infrared transmitter provides, infrared radiation receiving circuit reacted on the degree of closeness of exterior object, increased or reduce the amplitude size of control signal.
When wherein externally object moved closer to lighting device, control signal is grow gradually, and LED driving circuit strengthens the brightness of light-emitting diode according to control signal gradually.
When wherein externally object left lighting device gradually, control signal died down gradually, and LED driving circuit weakens the brightness of light-emitting diode according to control signal gradually.
Wherein infrared transmitter comprises an infrared light-emitting diode and one first resistance.Infrared light-emitting diode is in order to launch infrared ray, and the anode tap of infrared light-emitting diode couples one first operating voltage.First resistance is coupled between the cathode terminal and one second operating voltage of infrared light-emitting diode.
Wherein infrared radiation receiving circuit comprises an optotransistor and one second resistance.Optotransistor couples one first operating voltage, produces one in order to receive the infrared ray that reflects through exterior object and detects electric current.Second resistance is coupled between optotransistor and one second operating voltage, detect electric current and form cross-pressure at second resistance, and the place of coupling between optotransistor and second resistance is in order to export control signal.
Wherein infrared radiation receiving circuit more comprises an amplifying unit, and the input of amplifying unit receives control signal, does output in the output of amplifying unit after amplifying control signal.
Wherein LED driving circuit comprises a transistor and one the 3rd resistance.Transistor couples light-emitting diode, in order to produce a drive current according to control signal, so that lumination of light emitting diode.The 3rd resistance is coupled between transistor AND gate one second operating voltage.
Wherein transistor is bipolar transistor.
The embodiment of the invention proposes a kind of lighting device, and it comprises infrared transmitter, infrared radiation receiving circuit, at least one light-emitting diode and LED driving circuit.Infrared transmitter is in order to launch infrared ray to the outside of lighting device.The infrared ray that infrared radiation receiving circuit reflects in order to the exterior object that receives through lighting device, and according to strong and weak output one control signal that changes of the energy of the reflected infrared ray that receives.LED driving circuit couples infrared radiation receiving circuit and described at least one light-emitting diode, adjusts the brightness of light-emitting diode according to the power of control signal.
In one embodiment of this invention, infrared transmitter, infrared radiation receiving circuit, described at least one light-emitting diode and LED driving circuit realize with passive component, and are disposed in a bulb lamp shell or the cast lamp housing.
In one embodiment of this invention, when at least one mobile object moved in the infrared radiation scope that lighting device is launched, infrared radiation receiving circuit reacted on the degree of closeness of mobile object, increases or reduce the amplitude of control signal.When mobile object moved closer to lighting device, LED driving circuit strengthened the brightness of light-emitting diode according to control signal gradually.When mobile object left lighting device gradually, LED driving circuit weakened the brightness of light-emitting diode according to control signal gradually.
In one embodiment of this invention, infrared transmitter comprises infrared light-emitting diode and first resistance.The anode tap of infrared light-emitting diode couples first operating voltage.First resistance is coupled between the cathode terminal and second operating voltage of infrared light-emitting diode.
In one embodiment of this invention, infrared radiation receiving circuit comprises optotransistor and second resistance.Optotransistor couples first operating voltage, produces one in order to receive the infrared ray through reflecting and detects electric current.Second resistance is coupled between optotransistor and second operating voltage, detect electric current and form cross-pressure at second resistance, and the place of coupling of optotransistor and second resistance is in order to export control signal.
In one embodiment of this invention, infrared radiation receiving circuit more comprises amplifying unit.The input of this amplifying unit receives control signal, does output after amplifying control signal.
In one embodiment of this invention, LED driving circuit comprises transistor and the 3rd resistance.Transistor couples light-emitting diode, in order to produce a drive current according to control signal, so that lumination of light emitting diode.The 3rd resistance is coupled between transistor AND gate second operating voltage.In part embodiment, transistor is bipolar transistor.
Based on above-mentioned, lighting device of the present invention is taked to change integral illumination brightness according to strong and weak variation of the energy of reflected infrared ray, therefore can be according to personnel's situation of movement, when near lighting device and blast gradually, and when leaving lighting device and deepening gradually.Can certainly light or close the light of turning off the light according to having or not personnel to pass in and out automatically.On the other hand, all elements of lighting device of the present invention are because adopting passive component, can centralized configuration in a bulb lamp shell or a cast lamp housing.Therefore old lamp socket can be used lighting device of the present invention and not need to transform especially light fixture, can save many costs compared to the framework of known plug-in sensing apparatus.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Below appended graphic be the part of specification of the present invention, illustrated example embodiment of the present invention, appended graphic description with specification illustrates principle of the present invention.
Fig. 1 is the circuit diagram according to the lighting device of one embodiment of the invention.
Fig. 2 is the schematic diagram of using the lighting device of the embodiment of the invention.
Fig. 3 is the schematic diagram according to the lighting device of another embodiment of the present invention.
The main element symbol description:
100,100A～100C: lighting device
110, IR1, IR2: infrared transmitter
112: infrared light-emitting diode
114: the first resistance
120, PT: infrared radiation receiving circuit
122: optotransistor
124: the second resistance
130: at least one light-emitting diode
140: LED driving circuit
142: transistor
144: the three resistance
150: amplifying unit
152: buffer
160: exterior object
210: mobile object
220: ceiling
310: mobile object
GND: second operating voltage
I
DRIVE: drive current
I
E: detect electric current
N
1: couple the place
S
C: control signal
V
DD: first operating voltage
θ
1, θ
2: the infrared radiation scope
Embodiment
Now will be in detail with reference to embodiments of the invention, and the example of described embodiment is described in the accompanying drawings.In addition, all possible locating use the element/member of same numeral to represent identical or similar portions in graphic and execution mode.
Fig. 1 is the circuit diagram according to the lighting device of one embodiment of the invention.See also Fig. 1.Lighting device 100 comprises infrared transmitter 110, infrared radiation receiving circuit 120, at least one light-emitting diode (LED) 130 and LED driving circuit 140.Infrared transmitter 110 is in order to launch infrared ray to the outside of lighting device 100.And the infrared ray that infrared radiation receiving circuit 120 reflects in order to the exterior object 160 that receives through lighting device 100.Infrared radiation receiving circuit 120 changes according to the energy of the reflected infrared ray that receives is strong and weak, comes output-response in the control signal S of the power of reflected infrared ray
CFor example, when the state of no exterior object 160, infrared radiation receiving circuit 120 is received less reflected infrared ray, so the less control signal S of output amplitude
CWhen the state of exterior object 160 was arranged, infrared radiation receiving circuit 120 was received bigger reflected infrared ray, so the bigger control signal S of output amplitude
CWhen having the state of very many exterior objects 160, infrared radiation receiving circuit 120 can be received maximum reflected infrared ray, so the control signal S of output amplitude maximum
C LED driving circuit 140 couples infrared radiation receiving circuit 120 and light-emitting diode 130.LED driving circuit 140 is according to control signal S
CPower adjust the brightness of light-emitting diode 130.
Can be learnt clearly that by above-mentioned explanation this lighting device 100 is taked to change integral illumination brightness according to strong and weak variation of the energy of reflected infrared ray, therefore can adjust the brightness of LED at personnel's situation of movement.
In simple terms, infrared transmitter 110 can comprise infrared light-emitting diode 112 and first resistance 114.The anode tap of infrared light-emitting diode 112 couples the first operating voltage V
DD First resistance 114 is coupled between the cathode terminal and the second operating voltage GND of infrared light-emitting diode 112.In part embodiment, the first operating voltage V
DDFor example be 3.3 volts of (V) direct voltages, the second operating voltage GND can be earthing potential.
Infrared radiation receiving circuit 120 can comprise optotransistor 122 and second resistance 124.Optotransistor 122 couples the first operating voltage V
DD Second resistance 124 is coupled between optotransistor 122 and the second operating voltage GND.Optotransistor 122 produces one and detects electric current I in order to receive the infrared ray through reflecting
E, the detection electric current I of part
EForm cross-pressure at second resistance 124, and coupling between optotransistor 122 and second resistance 124 located N
1In order to the output control signal S relevant with voltage
CIn one embodiment, as the first operating voltage V
DDWhen being 3.3 volts of (V) direct voltages, control signal S
CIt can be the direct voltage that is not more than 3.3 volts (V).At part embodiment, infrared radiation receiving circuit 120 optionally comprises amplifying unit 150.The input of this amplifying unit 150 receives control signal S
C, in order to amplify control signal S
COutput is done in the output of amplifying unit 150 in the back.Can utilize buffer 152 to realize amplifying unit 150 in one embodiment, but the present invention is not as limit.
What deserves to be mentioned is, the infrared transmitter 110 of this lighting device 100, infrared radiation receiving circuit 120, light-emitting diode 130 and LED driving circuit 140 are that the combination with passive component, active element or passive component and active element realizes, and can will be disposed in all sets of elements in a bulb lamp shell or the cast lamp housing.Therefore old lamp socket can be used bulb lamp or tube lamp and not need to transform especially light fixture, thus can save many costs compared to the framework of known plug-in sensing apparatus, and benefit and promote the LED lamp, and the LED lamp more can be popularized.
When the people the closer to lighting device, LED is more bright; When the people more away from lighting device, LED is more dark, therefore not only can reach dynamic multisection type LED dimming function, more can reach the environmental benefit of energy saving.
Fig. 2 is the schematic diagram of using the lighting device of the embodiment of the invention.See also Fig. 2.The 100A and the 100B that are same as lighting device 100 have been used in this embodiment.In a space, lighting device 100A and 100B are installed on ceiling 220.Lighting device 100A and 100B have one group of infrared radiation receiving circuit separately, thereby deal with strong and weak variation of energy of reflected infrared ray separately, and the brightness of each self-adjusting LED.The strong and weak variation of energy that perhaps, can also merge all reflected infrared raies of handling this group infrared radiation receiving circuit simultaneously.The infrared radiation range Theta of launching at lighting device 100A as at least one mobile object 210
1In or the infrared radiation range Theta of launching at lighting device 100B
2During interior the movement, two groups of infrared radiation receiving circuits react on the degree of closeness of mobile object 210 separately, increase or reduce the amplitude size of control signal.When mobile object 210 moved closer to lighting device 100A/100B, lighting device 100A/100B strengthened the brightness of LED gradually.Otherwise when mobile object 210 left lighting device 100A/100B gradually, lighting device 100A/100B weakened the brightness of LED gradually.So can reach according to having or not personnel to pass in and out and light or close the light of turning off the light automatically.Note that application of the present invention is not limited to two groups of lighting devices, can adjust to some extent according to the practical application place.
Fig. 3 is the schematic diagram according to the lighting device of another embodiment of the present invention.See also Fig. 3.Lighting device 100C can comprise two groups of infrared transmitter IR1 and IR2 and one group of infrared radiation receiving circuit PT.Infrared transmitter IR1, IR2 are respectively on left side and the right side of light fixture, and infrared radiation receiving circuit PT is used for receiving the infrared ray that reflects through mobile object 310.By different infrared transmitter IR1, IR2, mobile from left to right when mobile object 310, can make lighting device 100C gradually bright gradually dark again by the infrared signal of reflection.Therefore, can reach comfortableness and pioneering using and use.
In addition, at open spaces such as some hypermarket or shelf, the light fixture of the above-mentioned lighting device 100 of an amount of tool, 100A～100C function is installed, just can be judged the personnel's number that enters and exits, change integral illumination brightness.The people after a little while, can be only local on commodity, to cause consumer's attention; And the people for a long time, infrared radiation receiving circuit is more easily received the infrared ray of reflection, increases the brightness of LED by this mechanism.
Light-emitting diode described in above-described embodiment can be white light emitting diode, and white light emitting diode can comprise blue led chips and yellow phosphor powder, more can comprise red light emitting diodes chip or red fluorescent powder.In addition, white light emitting diode can comprise redness, green and blue led chips, more can comprise yellow phosphor powder, further can comprise red fluorescent powder.In addition, light-emitting device can comprise redness, green or blue LED.Wherein, above-mentioned phosphor powder is distributed in the printing opacity colloid of the light-emitting diode described in above-described embodiment in mode even, inhomogeneous or that concentration gradient changes.
Light-emitting diode described in above-described embodiment can be a plurality of series, parallel or series-parallel light-emitting diode, and the glow color of light-emitting diode can be identical, phase XOR part is identical.
Lighting device described in above-described embodiment, can be applied to that room lighting, outdoor lighting, automobile-used, backlight module, byte show, situation is used, plant with and special applications etc. is green can product on.
In sum, lighting device of the present invention is taked to change integral illumination brightness according to strong and weak variation of the energy of reflected infrared ray, therefore can be according to personnel's situation of movement, when near lighting device and blast gradually, and when leaving lighting device and deepening gradually.Can certainly light or close the light of turning off the light according to having or not personnel to pass in and out automatically.On the other hand, all elements of lighting device of the present invention realize because adopting passive component, these elements simple and can centralized configuration in a bulb lamp shell or a cast lamp housing.Therefore old lamp socket can be used lighting device of the present invention and not need to transform especially light fixture, can save many costs compared to the framework of known plug-in sensing apparatus, has more advantage for promoting the LED lamp.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (10)
1. lighting device comprises:
One infrared transmitter is in order to launch infrared ray and an infrared radiation scope is provided;
One infrared radiation receiving circuit arranges corresponding to this infrared transmitter, the infrared ray that reflects in order to an exterior object that receives in this infrared radiation scope, and export a control signal accordingly according to strong and weak variation of the energy of the reflected infrared ray that receives;
At least one light-emitting diode; And
One LED driving circuit is coupled between this infrared radiation receiving circuit and this light-emitting diode, adjusts the brightness of this light-emitting diode according to the power of this control signal.
2. lighting device as claimed in claim 1, it is characterized in that, this infrared transmitter, this infrared radiation receiving circuit, this light-emitting diode and this LED driving circuit have a plurality of passive components, and are disposed in a bulb lamp shell or the cast lamp housing.
3. lighting device as claimed in claim 1, it is characterized in that, when this exterior object moved in this infrared radiation scope that this infrared transmitter provides, this infrared radiation receiving circuit reacted on the degree of closeness of this exterior object, increases or reduce the amplitude size of this control signal.
4. lighting device as claimed in claim 3 is characterized in that, when this exterior object moved closer to this lighting device, this control signal is grow gradually, and this LED driving circuit strengthens the brightness of this light-emitting diode according to this control signal gradually.
5. lighting device as claimed in claim 3 is characterized in that, when this exterior object left this lighting device gradually, this control signal died down gradually, and this LED driving circuit weakens the brightness of this light-emitting diode according to this control signal gradually.
6. lighting device as claimed in claim 1 is characterized in that, this infrared transmitter comprises:
One infrared light-emitting diode, in order to launch infrared ray, the anode tap of this infrared light-emitting diode couples one first operating voltage; And
One first resistance is coupled between the cathode terminal and one second operating voltage of this infrared light-emitting diode.
7. lighting device as claimed in claim 1 is characterized in that, this infrared radiation receiving circuit comprises:
One optotransistor couples one first operating voltage, produces one in order to receive the infrared ray that reflects through this exterior object and detects electric current; And
One second resistance is coupled between this optotransistor and one second operating voltage, and this detects electric current and forms cross-pressure at this second resistance, and the place of coupling between this optotransistor and this second resistance is in order to export this control signal.
8. lighting device as claimed in claim 7 is characterized in that, this infrared radiation receiving circuit also comprises:
One amplifying unit, the input of this amplifying unit receives this control signal, does output in the output of this amplifying unit after amplifying this control signal.
9. lighting device as claimed in claim 1 is characterized in that, this LED driving circuit comprises:
One transistor couples this light-emitting diode, in order to produce a drive current according to this control signal, so that this lumination of light emitting diode; And
One the 3rd resistance is coupled between this transistor AND gate one second operating voltage.
10. lighting device as claimed in claim 9 is characterized in that, this transistor is bipolar transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100547993A CN103298192A (en) | 2012-03-05 | 2012-03-05 | Lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100547993A CN103298192A (en) | 2012-03-05 | 2012-03-05 | Lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103298192A true CN103298192A (en) | 2013-09-11 |
Family
ID=49098306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100547993A Pending CN103298192A (en) | 2012-03-05 | 2012-03-05 | Lighting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103298192A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006056814A1 (en) * | 2004-11-24 | 2006-06-01 | Mathmos Limited | Proximity sensor dimming control for a light |
| CN101360381A (en) * | 2007-08-04 | 2009-02-04 | 光合机电有限公司 | Lamp and control method |
| TW200907621A (en) * | 2007-08-03 | 2009-02-16 | Licht Co Ltd De | Lamp and method for controlling lamp |
| TW200913781A (en) * | 2007-05-07 | 2009-03-16 | Koninkl Philips Electronics Nv | Lighting device and control method |
| JP2010049938A (en) * | 2008-08-21 | 2010-03-04 | Sharp Corp | Lighting system |
| CN201450635U (en) * | 2009-06-09 | 2010-05-05 | 常州星宇车灯股份有限公司 | Regulating circuit of automobile self-adaption rear indicator light |
-
2012
- 2012-03-05 CN CN2012100547993A patent/CN103298192A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006056814A1 (en) * | 2004-11-24 | 2006-06-01 | Mathmos Limited | Proximity sensor dimming control for a light |
| TW200913781A (en) * | 2007-05-07 | 2009-03-16 | Koninkl Philips Electronics Nv | Lighting device and control method |
| TW200907621A (en) * | 2007-08-03 | 2009-02-16 | Licht Co Ltd De | Lamp and method for controlling lamp |
| CN101360381A (en) * | 2007-08-04 | 2009-02-04 | 光合机电有限公司 | Lamp and control method |
| JP2010049938A (en) * | 2008-08-21 | 2010-03-04 | Sharp Corp | Lighting system |
| CN201450635U (en) * | 2009-06-09 | 2010-05-05 | 常州星宇车灯股份有限公司 | Regulating circuit of automobile self-adaption rear indicator light |
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Application publication date: 20130911 |