技术领域：Technical field:
本实用新型涉及LED灯领域，尤其涉及色温分段式调整LED灯。The utility model relates to the field of LED lamps, in particular to an LED lamp with segmented color temperature adjustment.
背景技术：Background technique:
LED，发光二极管，是一种能够将电能转化为可见光的固态的半导体器件，它可以直接把电转化为光。LED的心脏是一个半导体的晶片，晶片的一端附在一个支架上，一端是负极，另一端连接电源的正极，使整个晶片被环氧树脂封装起来。半导体晶片由两部分组成，一部分是P型半导体，在它里面空穴占主导地位，另一端是N型半导体，在这边主要是电子。但这两种半导体连接起来的时候，它们之间就形成一个P-N结。当电流通过导线作用于这个晶片的时候，电子就会被推向P区，在P区里电子跟空穴复合，然后就会以光子的形式发出能量，这就是LED灯发光的原理。而光的波长也就是光的颜色，是由形成P-N结的材料决定的。LED, light-emitting diode, is a solid-state semiconductor device that can convert electrical energy into visible light, and it can directly convert electricity into light. The heart of LED is the wafer of a semiconductor, and one end of wafer is attached on a bracket, and one end is negative pole, and the other end connects the positive pole of power supply, and whole wafer is encapsulated by epoxy resin. Semiconductor wafer is made up of two parts, and a part is P-type semiconductor, and hole occupies an leading position in it, and the other end is N-type semiconductor, and here mainly is electron. But time these two kinds of semiconductors couple together, between them, just form a P-N junction. When electric current acts on this chip by wire time, electron will be pushed to P district, and in P district, electron is recombined with hole, then will send energy with the form of photon, the principle of LED light that Here it is. And the wavelength of light i.e. the color of light, be determined by the material forming P-N junction.
LED 灯作为一种节能光源得到广泛的应用，消费者在不同时间对色温有不同要求，但现有技术比较单一，不能根据需要灵活调整；同时现在LED灯的散热非常被动， 主要通过散热装置把LED灯产生的热量导出去；现有技术中，散热装置固定，散热能力有限，在功率增加时，热量同时增加，因为现有技术不能有效解决散热，限制了多种色温的混合应用。LED lamps are widely used as an energy-saving light source. Consumers have different requirements for color temperature at different times. The heat generated by the LED lamp is exported; in the prior art, the cooling device is fixed, and the cooling capacity is limited. When the power increases, the heat increases at the same time, because the prior art cannot effectively solve the heat dissipation, which limits the mixed application of multiple color temperatures.
实用新型内容：Utility model content:
为了解决上述问题，本实用新型提供了一种色温分段式调整LED灯，本技术方案结构原理简单，可实现LED灯色温、功率自动调节、风扇自动启动降温、功率因素因数高的技术效果：In order to solve the above problems, the utility model provides an LED lamp with segmented color temperature adjustment. The technical scheme has a simple structure and principle, and can realize the technical effects of LED lamp color temperature, automatic power adjustment, fan automatic startup and cooling, and high power factor factor:
色温分段式调整LED灯，主要包括白光LED灯珠、黄光LED灯珠、风扇以及分段控制器，分段控制器包括变压器、PWM脉宽调制芯片、分段调光控制芯片，还包括整流滤波电路、稳压控制电路、开关取样电路、白光及黄光LED驱动电路、暖白光功率提升电路以及暖白光功率提升启动风扇控制电路。Segmented color temperature adjustment LED lights, mainly including white LED lamp beads, yellow LED lamp beads, fans and segment controllers, segment controllers include transformers, PWM pulse width modulation chips, segment dimming control chips, and also include Rectification filter circuit, voltage stabilization control circuit, switch sampling circuit, white and yellow LED drive circuit, warm white power boost circuit, and warm white power boost startup fan control circuit.
作为优选，整流滤波电路包括二极管A、二极管B、二极管C、二极管D与电容A，电源输入端通过开关串联熔断器接入整流滤波电路输入端。Preferably, the rectification and filtering circuit includes a diode A, a diode B, a diode C, a diode D and a capacitor A, and the input end of the power supply is connected to the input end of the rectification and filtering circuit through a switch series fuse.
作为优选，PWM脉宽调制芯片VDD端一脚与GND端二脚之间连接电容B并接地，COMP端三脚连接电容C并接地，GATE端四脚通过电阻B连接场效应晶体管A栅极，CS端五脚分别连接电阻D一端，二极管F负极连接电阻D一端、变压器初级线圈一端、电阻E一端，电阻E另一端与电阻F一端连接PWM脉宽调制芯片ZCD端六脚，电阻D另一端与场效应晶体管A源极连接，电阻F另一端与变压器初级线圈另一端连接电解电容A并接地，二极管E阳极连接电解电容A正极，阴极连接电阻A一端。Preferably, the first pin of the VDD end of the PWM pulse width modulation chip and the second pin of the GND end are connected to a capacitor B and grounded, the third pin of the COMP end is connected to a capacitor C and grounded, the fourth pin of the GATE end is connected to the gate of the field effect transistor A through a resistor B, and CS The five pins of the terminal are respectively connected to one end of the resistor D, the negative pole of the diode F is connected to one end of the resistor D, one end of the primary coil of the transformer, one end of the resistor E, the other end of the resistor E is connected to the end of the resistor F, and the six pins of the ZCD terminal of the PWM pulse width modulation chip are connected, and the other end of the resistor D is connected to The field effect transistor A is connected to the source, the other end of the resistor F is connected to the electrolytic capacitor A and grounded to the other end of the primary coil of the transformer, the anode of the diode E is connected to the positive electrode of the electrolytic capacitor A, and the cathode is connected to one end of the resistor A.
作为优选，稳压控制电路由二极管H、三极管C、电阻I、电解电容B、稳压管组成，开关取样电路由电阻H、电阻J组成，分段调光控制芯片PO端一脚连接开关取样电路，VDD端五脚连接三极管C发射极，三极管C基极连接稳压管并接地，电阻I接在三极管C集电极与基极之间，三极管C集电极接电解电容B并接地，分段调光控制芯片GND端二脚接地。Preferably, the voltage stabilizing control circuit is composed of a diode H, a triode C, a resistor I, an electrolytic capacitor B, and a voltage stabilizing tube; the switch sampling circuit is composed of a resistor H and a resistor J; Circuit, the five pins of the VDD terminal are connected to the emitter of the triode C, the base of the triode C is connected to the voltage regulator tube and grounded, the resistor I is connected between the collector and the base of the triode C, the collector of the triode C is connected to the electrolytic capacitor B and grounded, segmented The two pins of the GND terminal of the dimming control chip are grounded.
作为优选，白光或黄光LED驱动电路由电阻M、电阻N、场效应晶体管B、场效应晶体管C组成，电阻N一端连接分段调光控制芯片P2端四脚，一端连接场效应晶体管B栅极，场效应晶体管B漏极连接白光LED灯珠，场效应晶体管B源极接地，电阻M一端连接分段调光控制芯片P1端三脚，一端连接场效应晶体管C栅极，场效应晶体管C漏极连接黄光LED灯珠，场效应晶体管C源极接地。Preferably, the white or yellow LED driving circuit is composed of a resistor M, a resistor N, a field effect transistor B, and a field effect transistor C. One end of the resistor N is connected to four pins of the segmented dimming control chip P2, and one end is connected to the gate of the field effect transistor B. pole, the drain of field effect transistor B is connected to the white LED lamp bead, the source of field effect transistor B is grounded, one end of the resistor M is connected to the three pins of the segmented dimming control chip P1, one end is connected to the gate of field effect transistor C, and the drain of field effect transistor C The pole is connected to the yellow LED lamp bead, and the source of the field effect transistor C is grounded.
作为优选，暖白光功率提升电路包括二极管I、二极管J、三极管A、电阻C、电阻G，二极管I正极连接黄光LED灯珠、二极管I负极连接三极管A基极，二极管J正极连接白光LED灯珠，二极管J负极与二极管I负极相连，电阻C接在三极管A基极与发射极之间，电阻G连接三极管A基极并接地。Preferably, the warm white light power boosting circuit includes a diode I, a diode J, a transistor A, a resistor C, and a resistor G, the anode of the diode I is connected to the yellow LED lamp bead, the cathode of the diode I is connected to the base of the transistor A, and the anode of the diode J is connected to the white LED lamp Bead, the cathode of diode J is connected to the cathode of diode I, the resistor C is connected between the base and emitter of triode A, and the resistor G is connected to the base of triode A and grounded.
作为优选，暖白光功率提升启动风扇控制电路包括变压器次级线圈、二极管G、电解电容C、电阻K、三极管B、电阻L、二极管I、二极管J，三极管B发射极依次连接二极管G、变压器次级线圈并接地，电解电容C正极连接三极管B发射极，负极接地，电阻K接在三极管B基极与电解电容C负极之间，风扇一端连接三极管B集电极，另一端与电阻L一端连接，电阻L另一端接地。Preferably, the warm white light power boost starting fan control circuit includes a transformer secondary coil, a diode G, an electrolytic capacitor C, a resistor K, a triode B, a resistor L, a diode I, and a diode J, and the emitter of the triode B is connected to the diode G and the secondary The first coil is grounded, the positive pole of the electrolytic capacitor C is connected to the emitter of the triode B, the negative pole is grounded, the resistor K is connected between the base of the triode B and the negative pole of the electrolytic capacitor C, one end of the fan is connected to the collector of the triode B, and the other end is connected to the end of the resistor L. The other end of the resistor L is grounded.
本实用新型的有益效果在于：本实用新型采用90V-260V，50HZ宽电压输入，在电源端取消滤波电解，能够使PFC保持较高的功率因数，采用白光和黄光LED驱动电路和暖白光功率提升电路可实现LED灯色温、功率调节，同时当暖白光功率增加时，又可实现风扇自动启动降温来保护LED灯。The beneficial effects of the utility model are: the utility model adopts 90V-260V, 50HZ wide voltage input, cancels the filter electrolysis at the power supply end, can keep the PFC with high power factor, adopts white light and yellow light LED drive circuit and warm white light power The boost circuit can realize the color temperature and power adjustment of the LED light. At the same time, when the power of the warm white light increases, the fan can automatically start to cool down to protect the LED light.
附图说明：图1为本实用新型的电路原理图。Description of drawings: Fig. 1 is a schematic circuit diagram of the utility model.
具体实施方式：为使本实用新型的发明目的、技术方案和优点更加清楚，下面将结合附图对本实用新型的实施方式作进一步地详细描述。Specific embodiments: In order to make the purpose, technical solutions and advantages of the present invention clearer, the implementation of the present invention will be further described in detail below in conjunction with the accompanying drawings.
如图1所示，色温分段式调整LED灯，主要包括白光LED灯珠1、黄光LED灯珠2、风扇3以及分段控制器，分段控制器包括变压器T、PWM脉宽调制芯片U、分段调光控制芯片V，还包括整流滤波电路4、稳压控制电路5、开关取样电路6、白光及黄光LED驱动电路7、暖白光功率提升电路8以及暖白光功率提升启动风扇控制电路9，整流滤波电路4包括二极管A 1d、二极管B 2d、二极管C 3d、二极管D 4d与电容A 1b，电源输入端通过开关K1串联熔断器F1接入整流滤波电路4输入端，PWM脉宽调制芯片U VDD端一脚U1与GND端二脚U2之间连接电容B 2b并接地，COMP端三脚U3连接电容C 3b并接地，GATE端四脚U4通过电阻B 2a连接场效应晶体管A 1e栅极，CS端五脚U5分别连接电阻D 4a一端，二极管F 6d负极连接电阻D 4a一端、变压器T初级线圈T1一端、电阻E 5a一端，电阻E 5a另一端与电阻F 6a一端连接PWM脉宽调制芯片U ZCD端六脚U6，电阻D 4a另一端与场效应晶体管A 1e源极连接，电阻F 6a另一端与变压器T初级线圈T1另一端连接电解电容A 1c并接地，二极管E 5d阳极连接电解电容A 1c正极，阴极连接电阻A 1a一端，PWM脉宽调制芯片U是靠改变脉冲宽度来控制输出电压，通过改变周期来控制其输出频率，而输出频率的变化可通过改变此此脉冲的调制周期来实现，这样，使调压和调频两个作用配合一致，且与中间直流环节无关，因而加快了调节速度，改善了动态性能，由于输出等幅脉冲只需恒定直流电源供电，使电网侧的功率因数大大改善。As shown in Figure 1, LED lamps with color temperature segmented adjustment mainly include white LED lamp bead 1, yellow LED lamp bead 2, fan 3, and a segment controller. The segment controller includes a transformer T and a PWM pulse width modulation chip. U, segmental dimming control chip V, also includes rectification filter circuit 4, voltage stabilization control circuit 5, switch sampling circuit 6, white light and yellow LED drive circuit 7, warm white light power boost circuit 8 and warm white light power boost startup fan The control circuit 9, the rectification filter circuit 4 includes diode A 1d, diode B 2d, diode C 3d, diode D 4d and capacitor A 1b, the input terminal of the power supply is connected to the input terminal of the rectification filter circuit 4 through the switch K1 series fuse F1, and the PWM pulse Width modulation chip U VDD terminal one pin U1 and GND terminal two pins U2 are connected to capacitor B 2b and grounded, COMP terminal three pins U3 are connected to capacitor C 3b and grounded, GATE terminal four pins U4 are connected to field effect transistor A 1e through resistor B 2a The gate, the five pins U5 of the CS terminal are respectively connected to one end of the resistor D 4a, the negative pole of the diode F 6d is connected to one end of the resistor D 4a, one end of the primary coil T1 of the transformer T, one end of the resistor E 5a, and the other end of the resistor E 5a is connected to the PWM pulse of the resistor F 6a Width modulation chip U ZCD terminal six-pin U6, the other end of resistor D 4a is connected to the source of field effect transistor A 1e, the other end of resistor F 6a is connected to the other end of transformer T primary coil T1 and the other end of electrolytic capacitor A 1c is grounded, and the anode of diode E 5d Connect the positive pole of the electrolytic capacitor A 1c, and connect the cathode to the end of the resistor A 1a. The PWM pulse width modulation chip U controls the output voltage by changing the pulse width, and controls its output frequency by changing the cycle, and the output frequency can be changed by changing this pulse In this way, the two functions of voltage regulation and frequency modulation are consistent, and have nothing to do with the intermediate DC link, thus speeding up the adjustment speed and improving the dynamic performance. Since the output of equal-amplitude pulses only needs to be powered by a constant DC power supply, the The power factor of the grid side is greatly improved.
稳压控制电路5由二极管H 8d、三极管C 3f、电阻I 9a、电解电容B 2c、稳压管ZD1组成，开关取样电路6由电阻H 8a、电阻J 10a组成，分段调光控制芯片V PO端一脚P1连接开关取样电路6，VDD端五脚V5连接三极管C 3f发射极，三极管C 3f基极连接稳压管ZD1并接地，电阻I 9a接在三极管C 3f集电极与基极之间，三极管C 3f集电极接电解电容B 2c并接地，分段调光控制芯片V GND端二脚V2接地，分段调光控制芯片V可达到调光的目的，无需额外的调光元件，每个LED灯均可实现调光，在全电压范围内，不管工作在何种亮度下，均可实现高效率与高功率因素。Voltage regulator control circuit 5 is composed of diode H 8d, transistor C 3f, resistor I 9a, electrolytic capacitor B 2c, voltage regulator tube ZD1, switch sampling circuit 6 is composed of resistor H 8a, resistor J 10a, segmental dimming control chip V One pin P1 of the PO terminal is connected to the switch sampling circuit 6, five pins V5 of the VDD terminal are connected to the emitter of the triode C 3f, the base of the triode C 3f is connected to the voltage regulator tube ZD1 and grounded, and the resistor I 9a is connected between the collector and the base of the triode C 3f In between, the collector of the triode C 3f is connected to the electrolytic capacitor B 2c and grounded, and the second pin V2 of the segmented dimming control chip V GND is grounded. The segmented dimming control chip V can achieve the purpose of dimming without additional dimming components. Each LED light can be dimmed, and can achieve high efficiency and high power factor in the full voltage range, regardless of the brightness of the work.
白光及黄光LED驱动电路7由电阻M 13a、电阻N 14a、场效应晶体管B 2e、场效应晶体管C 3e组成，电阻N 14a一端连接分段调光控制芯片V P2端四脚V4，一端连接场效应晶体管B 2e栅极，场效应晶体管B 2e漏极连接白光LED灯珠1，场效应晶体管B 2e源极接地，电阻M 13a一端连接分段调光控制芯片V P1端三脚V3，一端连接场效应晶体管C 3e栅极，场效应晶体管C 3e漏极连接黄光LED灯珠2，场效应晶体管C 3e源极接地。White light and yellow LED drive circuit 7 is composed of resistor M 13a, resistor N 14a, field effect transistor B 2e, and field effect transistor C 3e. One end of resistor N 14a is connected to segmented dimming control chip VP2 and four pins V4, and one end is connected to The gate of the field effect transistor B 2e, the drain of the field effect transistor B 2e are connected to the white LED lamp bead 1, the source of the field effect transistor B 2e is grounded, one end of the resistor M 13a is connected to the segmented dimming control chip VP1, and the third pin V3 is connected to the other end The gate of the field effect transistor C 3e, the drain of the field effect transistor C 3e is connected to the yellow LED lamp bead 2, and the source of the field effect transistor C 3e is grounded.
暖白光功率提升电路8包括二极管I 9d、二极管J 10d、三极管A 1f、电阻C 3a、电阻G 7a，二极管I 9d正极连接黄光LED灯珠2、二极管I 9d负极连接三极管A 1f基极，二极管J 10d正极连接白光LED灯珠1，二极管J 10d负极与二极管I 9d负极相连，电阻C 3a接在三极管A 1f基极与发射极之间，电阻G 7a连接三极管A 1f基极并接地。The warm white light power boosting circuit 8 includes a diode I 9d, a diode J 10d, a transistor A 1f, a resistor C 3a, and a resistor G 7a, the anode of the diode I 9d is connected to the yellow LED lamp bead 2, and the cathode of the diode I 9d is connected to the base of the transistor A 1f, The anode of the diode J 10d is connected to the white LED lamp bead 1, the cathode of the diode J 10d is connected to the cathode of the diode I 9d, the resistor C 3a is connected between the base and the emitter of the triode A 1f, and the resistor G 7a is connected to the base of the triode A 1f and grounded.
启动风扇控制电路9包括变压器T次级线圈T2、二极管G 7d、电解电容C 3c、电阻K 11a、三极管B 2f、电阻L 12a、二极管I 9d、二极管J 10d，三极管B 2f发射极依次连接二极管G 7d、变压器T次级线圈T2并接地，电解电容C 3c正极连接三极管B 2f发射极，负极接地，电阻K 11a接在三极管B 2f基极与电解电容C 3c负极之间，风扇3一端连接三极管B 2f集电极，另一端与电阻L 12a一端连接，电阻L 12a另一端接地。The starting fan control circuit 9 includes transformer T secondary coil T2, diode G 7d, electrolytic capacitor C 3c, resistor K 11a, transistor B 2f, resistor L 12a, diode I 9d, diode J 10d, and the emitter of transistor B 2f is connected to the diode in turn G 7d, the secondary coil T2 of the transformer T is grounded, the positive pole of the electrolytic capacitor C 3c is connected to the emitter of the triode B 2f, the negative pole is grounded, the resistor K 11a is connected between the base of the triode B 2f and the negative pole of the electrolytic capacitor C 3c, and one end of the fan 3 is connected The collector of the triode B 2f is connected to one end of the resistor L 12a, and the other end of the resistor L 12a is grounded.
工作原理：当开关K1闭合交流输入时，经二极管A 1d、二极管B 2d、二极管C 3d、二极管D 4d整流为脉动直流电压，再通过电容A 1b吸收次谐波后得到直流高压，在理想情况下，整流桥的导通角应为180度，但由于电容A 1b的作用，仅在接近交流峰值电压处的很短时间内才有输入电流经过整流桥对电容A 1b充电，50HZ交流电的半周期为10ms，整流桥的导通时间约为3ms，整流桥实际通过的是窄脉冲电流，经电阻A 1a及电容B 2b储能电容给PWM脉宽调制芯片U VDD端一脚U1供电，电阻E 5a、电阻F 6a分别给PWM脉宽调制芯片U ZCD端六脚U6提供场效应晶体管A 1e的截止及导通信号，电容C 3b为PWM脉宽调制芯片U匹配电容，电阻D 4a是恒流取样电阻接PWM脉宽调制芯片U CS端五脚U5, PWM脉宽调制芯片U GATE端四脚U4输出经电阻B 2a驱动场效应晶体管A 1e产生PWM脉宽调制电流经变压器T初级线圈T1及电解电容A 1c组成反激式LED恒流供电电源，由于在电源端取消了滤波电解，使输入包络线与输入电压基本相同，即PFC保持在较高的功率因数。开关K1第一次闭合时，白光LED灯珠1单独亮；开关K1第二次闭合时，黄光LED灯珠2单独亮；开关K1第三次闭合时，白光LED灯珠1、黄光LED灯珠2 同时亮，两色光合成发出暖白光，因为此时多色温灯珠发光，因此功率增加，发热量也同步增加，此时风扇自动启动降温，保护LED灯珠。Working principle: When the switch K1 is closed for AC input, it is rectified by diode A 1d, diode B 2d, diode C 3d, and diode D 4d to form a pulsating DC voltage, and then the capacitor A 1b absorbs sub-harmonics to obtain a DC high voltage. In an ideal situation In this case, the conduction angle of the rectifier bridge should be 180 degrees, but due to the effect of the capacitor A 1b, the input current will charge the capacitor A 1b through the rectifier bridge only in a short period of time close to the AC peak voltage, half of the 50HZ AC The period is 10ms, and the conduction time of the rectifier bridge is about 3ms. The rectifier bridge actually passes a narrow pulse current, which supplies power to the pin U1 of the U VDD terminal of the PWM pulse width modulation chip through the resistor A 1a and capacitor B 2b energy storage capacitor, and the resistor E 5a and resistor F 6a respectively provide the cut-off and conduction signals of the field effect transistor A 1e to the six-pin U6 of the ZCD terminal of the PWM pulse width modulation chip U, the capacitor C 3b is the matching capacitor of the PWM pulse width modulation chip U, and the resistor D 4a is a constant The current sampling resistor is connected to the PWM pulse width modulation chip U CS terminal five-pin U5, and the PWM pulse width modulation chip U GATE terminal four-pin U4 outputs through the resistor B 2a to drive the field effect transistor A 1e to generate PWM pulse width modulation current through the transformer T primary coil T1 And the electrolytic capacitor A 1c forms the flyback LED constant current power supply. Since the filter electrolysis is canceled at the power supply end, the input envelope is basically the same as the input voltage, that is, the PFC maintains a relatively high power factor. When switch K1 is closed for the first time, white LED bead 1 is on alone; when switch K1 is closed for the second time, yellow LED bead 2 is on alone; when switch K1 is closed for the third time, white LED bead 1 and yellow LED are on. Lamp beads 2 light up at the same time, and two-color light synthesis emits warm white light. Because the multi-color temperature lamp beads emit light at this time, the power increases and the heat generation also increases simultaneously. At this time, the fan automatically starts to cool down to protect the LED lamp beads.
分段调光控制芯片为目前市场上成熟芯片，可直接设计使用。The segmental dimming control chip is a mature chip on the market and can be directly designed and used.
上述实施例只是本实用新型的较佳实施例，并不是对本实用新型技术方案的限制，只要是不经过创造性劳动即可在上述实施例的基础上实现的技术方案，均应视为落入本实用新型专利的权利保护范围内。The above-described embodiments are only preferred embodiments of the present utility model, and are not limitations to the technical solutions of the present utility model. As long as the technical solutions that can be realized on the basis of the above-mentioned embodiments without creative work, all should be regarded as falling into the scope of this invention. within the protection scope of utility model patents.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520261925.1UCN204634098U (en) | 2015-04-28 | 2015-04-28 | A LED lamp with segmented color temperature adjustment |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520261925.1UCN204634098U (en) | 2015-04-28 | 2015-04-28 | A LED lamp with segmented color temperature adjustment |
| Publication Number | Publication Date |
|---|---|
| CN204634098Utrue CN204634098U (en) | 2015-09-09 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520261925.1UExpired - LifetimeCN204634098U (en) | 2015-04-28 | 2015-04-28 | A LED lamp with segmented color temperature adjustment |
| Country | Link |
|---|---|
| CN (1) | CN204634098U (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI607153B (en)* | 2016-07-15 | 2017-12-01 | 台達電子工業股份有限公司 | Smart ventilation fan system and smart ventilation fan device |
| CN107809821A (en)* | 2017-10-23 | 2018-03-16 | 东莞达文西光电有限公司 | A voltage-controlled dimming drive circuit |
| CN107831364A (en)* | 2017-11-15 | 2018-03-23 | 哈尔滨理工大学 | A kind of electric energy harmonic detecting method |
| CN110972382A (en)* | 2019-12-26 | 2020-04-07 | 珠海世讯科技有限公司 | Phase dimming circuit and method |
| CN118677240A (en)* | 2024-07-17 | 2024-09-20 | 东莞巨汉生物光电有限公司 | Wide-voltage input (80-260V) and low-voltage output direct-current circuit control system |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI607153B (en)* | 2016-07-15 | 2017-12-01 | 台達電子工業股份有限公司 | Smart ventilation fan system and smart ventilation fan device |
| CN107809821A (en)* | 2017-10-23 | 2018-03-16 | 东莞达文西光电有限公司 | A voltage-controlled dimming drive circuit |
| CN107809821B (en)* | 2017-10-23 | 2019-07-02 | 东莞达文西光电有限公司 | A voltage-controlled dimming drive circuit |
| CN107831364A (en)* | 2017-11-15 | 2018-03-23 | 哈尔滨理工大学 | A kind of electric energy harmonic detecting method |
| CN110972382A (en)* | 2019-12-26 | 2020-04-07 | 珠海世讯科技有限公司 | Phase dimming circuit and method |
| CN118677240A (en)* | 2024-07-17 | 2024-09-20 | 东莞巨汉生物光电有限公司 | Wide-voltage input (80-260V) and low-voltage output direct-current circuit control system |
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| CN204634098U (en) | A LED lamp with segmented color temperature adjustment | |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term | Granted publication date:20150909 |