CN201062748Y - Stroboscopic/lighting device based on LED - Google Patents
Stroboscopic/lighting device based on LED Download PDFInfo
- Publication number
- CN201062748Y CN201062748Y CNU2007200968747U CN200720096874U CN201062748Y CN 201062748 Y CN201062748 Y CN 201062748Y CN U2007200968747 U CNU2007200968747 U CN U2007200968747U CN 200720096874 U CN200720096874 U CN 200720096874U CN 201062748 Y CN201062748 Y CN 201062748Y
- Authority
- CN
- China
- Prior art keywords
- stroboscopic
- connects
- light emitting
- emitting diode
- lighting device
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model belongs to the field of observation instruments and lighting devices, in particular to a LED-based stroboflash / lighting device, and aims to provide a LED-based stroboflash / lighting device, which can provide suitable bright illumination and stroboscopic illumination and has stability and much long service life. The proposal adopted by the utility model is characterized in that: a plurality of diode arrays, which are connected in series, are coupled in parallel to form lattice illuminants, the positive pole of a lattice illuminant is connected with the positive pole of the power source and the negative pole of the lattice illuminant is connected with the switcher, and the positive and negative poles of other lattice illuminants are respectively connected with the switcher, which is separately connected with the positive pole of the power source, the ground and a work mode control triode collector. The base electrode of the work mode control triode is connected with the controller, the negative poles of other lattice illuminants are connected with the drain electrode of the MOS field effect tube, the grid electrode of the MOS field effect tube is connected with a current control triode collector, and the base electrode of the current control triode is connected with the controller. The utility model is mainly used to observe the objects under rapid movement.
Description
Technical field
The utility model belongs to observation instrument, field of illuminating device, particularly based on the stroboscopic/lighting device of light emitting diode.
Background technology
In industries such as machine-building, light industry, weaving, electric power, medicine, food processing, the object that needs the observation rapid movement is as all kinds of rotors, gears engaged, vibratory equipment, weaving, printing, packaging production line, the high speed body surface is damaged and running orbit or the like.Because its speed is very fast, can only use " stroboscopic lamp " to come it is observed, so that necessary adjustment.
Existing stroboscopic velocity metre (instrument) adopts gas discharge lamp tube (being commonly called as strobotron, flash lamp) as stroboscopic light source usually, this gas discharge lamp tube need use the driving voltage of several hectovolts and last kilovolt trigger voltage, and it realizes circuit complexity, poor reliability; And the inflation glass tube has shortcoming easily cracked, that the life-span is short; In addition, glisten strongly, dazzle the eyes, the light of the ultraviolet composition that wherein contains has damage to eyes, skin etc.; Also have, this gas discharge lamp tube can not be worked in a continuous manner, the price height.Therefore, its application has been subjected to very big restriction.
Light emitting diode (LED) is gas discharge lamp tube relatively, has sturdy and durablely, and structure is light and handy; Driving voltage is low, circuit is simple; Life-span is long, both can continue luminously, also can pulse mode carry out work; And length is shorter, easily makes light, thin, little strobotron, be installed in running device to be measured near, thereby realize treating (stroboscopic) illuminations of observation parts.If therefore can use light emitting diode, the light emitting diode of white especially (surpassing) high brightness substitutes the lattice luminous body of inflation glass tube as stroboscopic lamp, is more satisfactory implementation.
Utility model " adopts the flash of light velocity metre of LED as controlled stroboscopic light source " and (ZL200320107915.X) discloses a kind of LED of employing as stroboscopic light sources, with the portable flash speed measuring device of battery as power supply, its LED just works in the stroboscopic pattern, and there is not the adjusting control of stroboscopic pulsewidth, its function singleness.Utility model " stroboscopic illumination effect lamp " (ZL01276637.2) discloses a kind of stroboscopic illumination effect lamp, two kinds of lattice luminous bodies of stroboscopic lamp and light emitting diode are set on lamp socket, have illumination and stroboscopic action concurrently, and strengthened warning function with the light emitting diode of a plurality of different colours, its complex structure has the various shortcomings of traditional gas discharge lamp tube.Utility model " is used to detect the light emitting diode stroboscopic lamp and the drive circuit thereof of printing image " and (ZL200620041431.3) discloses a kind of light emitting diode stroboscopic lamp and drive circuit thereof that is used to detect the printing image; with the lattice luminous body of a plurality of light emitting diode connection in series-parallel as stroboscopic lamp; the drive circuit of light emitting diode comprises: frequency adjustment circuit, pulse shaping circuit, voltage conversion circuit, ON-OFF control circuit, holding circuit etc.; make the speed in frequency of stroboscopic and pattern printing synchronous, the electric current of light emitting diode is greater than 2 times of its operating current.Its LED just works in the stroboscopic pattern, and does not have the adjusting control of stroboscopic pulsewidth, its function singleness.
Summary of the invention
For overcoming the deficiencies in the prior art, a kind of stroboscopic/lighting device based on light emitting diode is provided, this device can provide suitable brightness illumination and stroboscopic illumination, and has security and sufficiently long service life.The technical solution adopted in the utility model is:
Some light emitting diode series connection connect into row, some diode row that are connected in series are connected in parallel and form lattice luminous body, a lattice luminous body positive pole connects positive source, lattice luminous body negative pole connects switch, all the other lattice luminous bodies are anodal to link to each other with switch respectively with negative pole, switch connects positive source respectively, ground and mode of operation control transistor collector, mode of operation control transistor base connects controller by its base resistance, mode of operation control transistor emitter ground connection, all the other lattice luminous body negative poles connect the metal-oxide-semiconductor field effect transistor drain electrode, metal-oxide-semiconductor field effect transistor substrate and source electrode common ground, the metal-oxide-semiconductor field effect transistor grid connects the Current Control transistor collector, the Current Control transistor collector connects positive source by its collector resistance, Current Control transistor emitter ground connection, the Current Control transistor base connects controller by its base resistance.
Described switch is made of relay, lattice luminous body negative pole is succeeded two fixed terminals of electrical equipment respectively, one connects positive source in two other fixed terminal of relay, another ground connection in described two other fixed terminal, the switched terminal of relay is switched with being connected between the positive source fixed terminal at the lattice luminous body negative pole fixed terminal of connection, the servo-actuated switched terminal of relay is connected with another between lattice luminous body negative pole fixed terminal at the ground connection fixed terminal accordingly to be switched, the switched terminal of relay connects all the other lattice luminous body positive poles, the servo-actuated switched terminal of relay connects all the other lattice luminous body negative poles, the relay positive pole connects positive source, be connected with diode between the relay both positive and negative polarity, diode cathode connects positive source, and the relay negative pole connects mode of operation control transistor collector.
Constituting of described controller: 555 integrated circuits the 3rd pin is connected input of NAND gate jointly with 4017 integrated circuits the 14th pin, the 14th pin of 4017 integrated circuits the 1st pin and another 4017 integrated circuit is connected another input of NAND gate jointly, NAND gate also has an input can switch the 6th pin that is connected to described another 4017 integrated circuit respectively by the NAND gate change-over switch, the 5th pin, the 10th pin, the 1st pin, the output of NAND gate connects Current Control transistor collector resistance, the output of NAND gate is also connected to single-chip microcomputer, single-chip microcomputer connects display, this outer controller also comprises the mode of operation change-over switch, the switch terminal of mode of operation change-over switch connects mode of operation control transistor base resistance, and mode of operation control transistor base resistance can switch to positive source or ground respectively through this change-over switch.
Described stroboscopic/lighting device based on light emitting diode, the remainder except that controller are arranged in the housing that transparency window arranged, and constitute a stroboscopic illumination pipe.
Described stroboscopic/lighting device based on light emitting diode comprises a controller, one or more stroboscopic illumination pipe.
Described controller can be connected by cable with the stroboscopic illumination pipe, and perhaps controller and stroboscopic illumination pipe are fixed together.
Be different from described another 4017 integrated circuit, described 4017 integrated circuits constitute the pulse width modulation of dutycycle 0～50% and select circuit.
555 integrated circuits and standard peripheral circuit thereof constitute pulse shaping and the regulating circuit within pulse frequency scope 3Hz～5000Hz.
The utility model can bring following technique effect:
1, adopt light emitting diode as illuminating source, thus overcome flash of light strong, dazzle the eyes, ultraviolet becomes to grade problem, safety, long service life.
2, controller circuitry adopts 555 integrated circuits, 4017 integrated circuits, in conjunction with Current Control triode, mode of operation control transistor collector, metal-oxide-semiconductor field effect transistor, relay etc., realize the conversion of illumination/stroboscopic operation pattern, simple in structure, working stability is reliable.
3, by being arranged to stroboscopic illumination pipe etc., work efficiency is increased at double.
4, become an installation cost cheap.
Description of drawings
Fig. 1 is the series-parallel schematic diagram of LED.
Fig. 2 is that the structure 1 of stroboscopic illumination pipe is formed schematic diagram.
Fig. 3 is that the structure 2 of stroboscopic illumination pipe is formed schematic diagram.
Fig. 4 is the circuit theory diagrams of controller.
Wherein:
1, the 2nd, the lattice luminous body that the LED connection in series-parallel is formed.
The 3rd, relay.
The 4th, the power-type metal-oxide-semiconductor.
5, the 6th, transistor.
7,7A, 7B, be diode.
The 9th, circuit connector.
R1, R2, Rm, R10, R11, R12, R20, R23, R24 are resistance.
R21, R22 are potentiometers.
C1 is a capacitor.
The 20th, ic 555.
21, the 22nd, integrated circuit 4017.
The 23rd, integrated circuit 4012.
The 25th, one-chip computer.
The 26th, display (LED charactron or liquid crystal LCD).
24, the 27th, switch.
The specific embodiment
The utility model is based on characteristics such as the electrical efficiency height of white superhigh brightness LED (LED), life-span length, good directionality, and purpose is to provide a kind of stroboscopic based on light emitting diode (LED)/illumination integrated device.Low for the brightness that solves LED, in difficulties such as stroboscopic and the brightness of when illumination are difficult to take into account, the utility model uses the light emitting diode string of a plurality of whites (surpassing) high brightness to compose in parallel the wide cut lighting source, by the mode of operation commutation circuit, make the operating current of each LED under the stroboscopic pattern that suitable brightness can be provided and guarantee safety and the life-span of LED; The lattice luminous body that the LED connection in series-parallel is formed constitutes a stroboscopic illumination pipe in drive circuit is encapsulated in a housing that transparency window arranged.
Of the present utility model being characterised in that, its package unit comprise a controller and more than one stroboscopic illumination pipe, and controller can change frequency, the pulse width of flash of light, to be applicable to friction speed, environment, testee, and the application demand in orientation etc.Identical at the supply voltage that throws light on under the stroboscopic pattern, switch switches two groups of illuminators and forms series connection under the light illumination mode, and the electric current that flows through light emitting diode is equal to or less than rated current, and it is luminous to be nominal brightness; Two groups of illuminator switch are in parallel under the stroboscopic pattern, and its transient current is greater than 3 times of rated current, and average current is less than rated current, and the instantaneous brightness superelevation nominal brightness that it is luminous can form bigger contrast.
Specify the utility model below in conjunction with drawings and Examples.
LED series parallel structure of the present utility model is formed series-parallel structure by resistance, LED as shown in Figure 1.A resistance is contacted mutually with several LED (being n among the figure) and is constituted a branch road, and several this branch roads (being m among the figure) compose in parallel the lattice luminous body of above-mentioned stroboscopic/illumination.
LED adopts white superhigh brightness LED.Some A among Fig. 1 is the positive pole of lattice luminous body, and B is the negative pole of lattice luminous body.
The structure of stroboscopic illumination pipe of the present invention is formed as shown in Figure 2, is made up of lattice luminous body 1, lattice luminous body 2, relay 3, power MOS pipe 4, transistor 5, transistor 6, diode 7, resistance R 10, resistance R 11, resistance R 12, circuit connector 9.The position P of figure repeat circuit is an illumination condition, and position S is the stroboscopic state.
When the mode of operation control line that provides when controller is high level, transistor 6 conductings among Fig. 2, relay 3 is inhaled and state, be in position S, at this moment lattice luminous body 1 and lattice luminous body 2 are relation in parallel, can it flow through electric current and be subjected to power MOS pipe 4 control, and promptly the control signal sent here of transistor 5 is the stroboscopic pattern.
When the mode of operation control line that provides when controller is low level, transistor 6 among Fig. 2 turn-offs, relay 3 is release conditions, be in position P, at this moment lattice luminous body 1 and lattice luminous body 2 are series relationship, and an end of lattice luminous body 2 directly links to each other with ground, and lattice luminous body flows through the control that electric current is not subjected to power MOS pipe 4, is light illumination mode.
Identical at the supply voltage that throws light on under the stroboscopic pattern, two groups of illuminators series connection under the light illumination mode, the electric current that flows through light emitting diode is equal to or less than rated current, and it is luminous to be nominal brightness; Two groups of illuminators are in parallel under the stroboscopic pattern, and its transient current is greater than 3 times of rated current, and average current is less than rated current, and the instantaneous brightness superelevation nominal brightness that it is luminous can form bigger contrast.
Fig. 3 is the schematic diagram that another structure of stroboscopic illumination pipe is formed, illuminator series connection in the time of can realizing throwing light on equally, illuminator parallel connection during stroboscopic.Its operation principle explanation: under the light illumination mode, power MOS pipe 4E, power MOS pipe 4C and transistor 6A conducting, lattice luminous body 1 and 2 series connection of lattice luminous body, and by power MOS pipe 4C ground connection, its luminous control that is not subjected to power MOS pipe 4A; Under the stroboscopic pattern, power MOS pipe 4B, power MOS pipe 4D and transistor 6B conducting, lattice luminous body 1 and 2 parallel connections of lattice luminous body, its luminous control that is subjected to power MOS pipe 4A.
The circuit theory of controller of the present utility model as shown in Figure 4, by 555 integrated circuits 20, be that 4017 integrated circuits, 21,4017 integrated circuits, 22,4012 integrated circuits 23, one-chip computer 25, LCD 26, switch 24, switch 27, potentiometer R21, potentiometer R22, resistance R 20, capacitor C1 are formed.
555 integrated circuits 20 are formed pulse shaping and frequency adjustment circuit with its peripheral circuit, and wherein R21 is used for the adjusting of frequency of oscillation, and R22 is the fine setting of oscillator signal dutycycle; 4017 integrated circuits, 21,4017 integrated circuits 22 consist of pulse width control circuit, and wherein band switch 24 is used to realize the selection of different duty, the final pulse frequency scope that realizes: 3Hz～5000Hz; Duty cycle range is: 0～50%; By the switching of switch 26 realization different working modes, it is the stroboscopic pattern that switch connects high level, and switch ground connection is light illumination mode; One-chip computer MCU25 and LCD 26 are formed display circuit, show the pulse frequency of flash of light in the mode of rotating speed or frequency.
To sum up, the utility model discloses a kind of stroboscopic/lighting device, be intended to use the shared lattice luminous body of light emitting diode, and make its brightness can satisfy the demand of cigarette tipping quality testing as stroboscopic and illumination integrated device based on light emitting diode.Described light emitting diode stroboscopic lamp composes in parallel the wide cut lighting source by a plurality of light emitting diode string.The drive circuit of described light emitting diode comprises: frequency adjustment circuit, be used for the pulse generation frequency that regulating impulse forms circuit, and the speed in frequency that pattern prints in the size that makes described frequency and the printing process is synchronous; Pulse shaping circuit is in order to produce the pulse signal that needs; The several times of operating current when connecting change-over circuit and can be used to make peak point current that each light emitting diode flows through in when stroboscopic to throw light on greater than it; ON-OFF control circuit is in order to open or to turn-off the electric current in the LED array circuit; Holding circuit can be when circuit breaks down, the electric current in the restriction LED array circuit.Make the people estimate the operation conditions that just can observe high-speed moving object easily, as all kinds of rotors, gears engaged, vibratory equipment diagnosis, weaving, printing, packaging production line, the damaged and running orbit of high speed body surface.
Claims (8)
1. stroboscopic/lighting device based on light emitting diode, it is characterized in that, some light emitting diode series connection connect into row, some diode row that are connected in series are connected in parallel and form lattice luminous body, the positive pole of a lattice luminous body connects positive source, lattice luminous body negative pole connects switch, all the other lattice luminous bodies are anodal to link to each other with switch respectively with negative pole, switch connects positive source respectively, ground and mode of operation control transistor collector, mode of operation control transistor base connects controller by its base resistance, mode of operation control transistor emitter ground connection, all the other lattice luminous body negative poles connect the metal-oxide-semiconductor field effect transistor drain electrode, metal-oxide-semiconductor field effect transistor substrate and source electrode common ground, the metal-oxide-semiconductor field effect transistor grid connects the Current Control transistor collector, the Current Control transistor collector connects positive source by its collector resistance, Current Control transistor emitter ground connection, and the Current Control transistor base connects controller by its base resistance.
2. a kind of stroboscopic/lighting device according to claim 1 based on light emitting diode, it is characterized in that, described switch is made of relay, lattice luminous body negative pole is succeeded two fixed terminals of electrical equipment respectively, one connects positive source in two other fixed terminal of relay, another ground connection in described two other fixed terminal, the switched terminal of relay is switched with being connected between the positive source fixed terminal at the lattice luminous body negative pole fixed terminal of connection, the servo-actuated switched terminal of relay is connected with another between lattice luminous body negative pole fixed terminal at the ground connection fixed terminal accordingly to be switched, the switched terminal of relay connects all the other lattice luminous body positive poles, the servo-actuated switched terminal of relay connects all the other lattice luminous body negative poles, the relay positive pole connects positive source, be connected with diode between the relay both positive and negative polarity, diode cathode connects positive source, and the relay negative pole connects mode of operation control transistor collector.
3. a kind of stroboscopic/lighting device according to claim 1 and 2 based on light emitting diode, it is characterized in that, constituting of described controller: 555 integrated circuits the 3rd pin is connected input of NAND gate jointly with 4017 integrated circuits the 14th pin, the 14th pin of 4017 integrated circuits the 1st pin and another 4017 integrated circuit is connected another input of NAND gate jointly, NAND gate also has an input can switch the 6th pin that is connected to described another 4017 integrated circuit respectively by the NAND gate change-over switch, the 5th pin, the 10th pin, the 1st pin, the output of NAND gate connects Current Control transistor collector resistance, the output of NAND gate is also connected to single-chip microcomputer, single-chip microcomputer connects display, this outer controller also comprises the mode of operation change-over switch, the switch terminal of mode of operation change-over switch connects mode of operation control transistor base resistance, and mode of operation control transistor base resistance can switch to positive source or ground respectively through this change-over switch.
4. a kind of stroboscopic/lighting device based on light emitting diode according to claim 1 and 2 is characterized in that, is different from described another 4017 integrated circuit, and described 4017 integrated circuits constitute the pulse width regulating circuit of dutycycle 0～50%.
5. a kind of stroboscopic/lighting device based on light emitting diode according to claim 1 and 2 is characterized in that, 555 integrated circuits and standard peripheral circuit thereof constitute pulse shaping and the regulating circuit within pulse frequency scope 3Hz～5000Hz.
6. a kind of stroboscopic/lighting device according to claim 1 and 2 based on light emitting diode, it is characterized in that, described stroboscopic/lighting device based on light emitting diode, the remainder except that controller are arranged in the housing that transparency window arranged, and constitute a stroboscopic illumination pipe.
7. a kind of stroboscopic/lighting device based on light emitting diode according to claim 6 is characterized in that described controller can be connected by cable with the stroboscopic illumination pipe, and perhaps controller and stroboscopic illumination pipe are fixed together.
8. a kind of stroboscopic/lighting device based on light emitting diode according to claim 6 is characterized in that described stroboscopic/lighting device based on light emitting diode comprises a controller, one or more stroboscopic illumination pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200968747U CN201062748Y (en) | 2007-07-25 | 2007-07-25 | Stroboscopic/lighting device based on LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200968747U CN201062748Y (en) | 2007-07-25 | 2007-07-25 | Stroboscopic/lighting device based on LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201062748Y true CN201062748Y (en) | 2008-05-21 |
Family
ID=39451123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200968747U Expired - Fee Related CN201062748Y (en) | 2007-07-25 | 2007-07-25 | Stroboscopic/lighting device based on LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201062748Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104080235A (en) * | 2013-03-28 | 2014-10-01 | 林万炯 | LED lamp control system |
| CN104080236A (en) * | 2013-03-28 | 2014-10-01 | 林万炯 | LED lamp control system |
| CN104519645A (en) * | 2014-11-27 | 2015-04-15 | 上海航空电器有限公司 | PWM (pulse-width modulation) dimming based light guide plate driving circuit |
| CN105704874A (en) * | 2014-11-28 | 2016-06-22 | 上海航空电器有限公司 | PBA driving circuit based on PWM dimming |
| CN114930674A (en) * | 2020-01-07 | 2022-08-19 | 赤多尼科两合股份有限公司 | Converter unit using status light |
-
2007
- 2007-07-25 CN CNU2007200968747U patent/CN201062748Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104080235A (en) * | 2013-03-28 | 2014-10-01 | 林万炯 | LED lamp control system |
| CN104080236A (en) * | 2013-03-28 | 2014-10-01 | 林万炯 | LED lamp control system |
| CN104080236B (en) * | 2013-03-28 | 2017-03-15 | 赛尔富电子有限公司 | A kind of LED lamp regulator control system |
| CN104519645A (en) * | 2014-11-27 | 2015-04-15 | 上海航空电器有限公司 | PWM (pulse-width modulation) dimming based light guide plate driving circuit |
| CN104519645B (en) * | 2014-11-27 | 2019-01-08 | 上海航空电器有限公司 | A kind of guide-lighting drive circuit based on PWM light modulation |
| CN105704874A (en) * | 2014-11-28 | 2016-06-22 | 上海航空电器有限公司 | PBA driving circuit based on PWM dimming |
| CN105704874B (en) * | 2014-11-28 | 2019-01-04 | 上海航空电器有限公司 | A kind of PBA driving circuit based on PWM light modulation |
| CN114930674A (en) * | 2020-01-07 | 2022-08-19 | 赤多尼科两合股份有限公司 | Converter unit using status light |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201062748Y (en) | Stroboscopic/lighting device based on LED | |
| CN101778510B (en) | LED signal indicator light and multipath LED drive circuits thereof | |
| CN2685701Y (en) | Light-emitting diode road lamp | |
| CN201651985U (en) | Illuminating lamp for sewing machine | |
| CN201733479U (en) | Circuit for carrying out pulse control on constant current diode to conduct and drive LED to emit light | |
| CN201178506Y (en) | LED control apparatus | |
| CN201526822U (en) | LED plane luminescent lamp disc | |
| CN204948399U (en) | Zero-frequency dodges LED control device | |
| CN202035201U (en) | LED (light-emitting diode) energy-saving lamp integration module | |
| CN208768321U (en) | A kind of dimming device and lamps and lanterns | |
| CN201779565U (en) | Automatically-controlled energy-saving LED illuminating lamp | |
| CN105246212A (en) | Novel LED (Light Emitting Diode) dimming circuit | |
| CN201639833U (en) | Switch pulse driving circuit structure adopting constant-current diode with control end | |
| CN2831543Y (en) | Small night lamp-type switching panel | |
| CN2926808Y (en) | Inductive light | |
| CN205610991U (en) | Outdoor energy -conserving lighting control system | |
| CN1929709B (en) | Light-emitting diode lighting circuit and method for improving its luminous efficiency | |
| CN204442809U (en) | Jamproof LED light drive circuit | |
| CN202738209U (en) | Dimming device based on light-emitting diode (LED) aisle lamps | |
| CN211930921U (en) | Traffic signal lamp circuit and safety traffic signal lamp formed by same | |
| CN102042572B (en) | Current balance type alternating current LED filament | |
| CN220798586U (en) | LED drive circuit and lighting device | |
| CN217643800U (en) | Two-wire signal transmission control circuit using negative voltage to obtain electricity | |
| CN2836404Y (en) | TV remote controller with lighting function | |
| CN203036499U (en) | Light-emitting diode (LED) irradiating lamp with dimming circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080521 Termination date: 20100725 |