WO2015196609A1 - 分段式调光电路及可调光照明设备 - Google Patents

分段式调光电路及可调光照明设备 Download PDF

Info

Publication number
WO2015196609A1
WO2015196609A1 PCT/CN2014/087631 CN2014087631W WO2015196609A1 WO 2015196609 A1 WO2015196609 A1 WO 2015196609A1 CN 2014087631 W CN2014087631 W CN 2014087631W WO 2015196609 A1 WO2015196609 A1 WO 2015196609A1
Authority
WO
WIPO (PCT)
Prior art keywords
resistor
capacitor
inductor
segmented
segmented dimming
Prior art date
Application number
PCT/CN2014/087631
Other languages
English (en)
French (fr)
Inventor
胡强龙
苏浩
Original Assignee
京东方科技集团股份有限公司
京东方光科技有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 京东方光科技有限公司 filed Critical 京东方科技集团股份有限公司
Publication of WO2015196609A1 publication Critical patent/WO2015196609A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source

Definitions

  • the invention relates to the field of dimming technology, in particular to a segmented dimming circuit and a dimmable lighting device.
  • dimming technology is widely used in various lamps.
  • Commonly used dimming techniques include thyristor dimming, linear dimming, PWM (pulse width modulation) dimming, remote dimming, and segmented dimming.
  • the segmentation dimming technology adopts switch control dimming, and does not need to change the existing installation mode, and is convenient to operate and simple to implement, and has become a mainstream dimming technology.
  • the segmented dimming technology achieves dimming by integrating a segmented dimming circuit inside the lamp switch.
  • the segmented dimming circuit provides a variety of brightness options for the luminaire, and the user can control dimming through the switch as needed.
  • the segmented dimming circuit is susceptible to external interference, so that the luminaire will hop without user operation.
  • the prior art designs an anti-interference module in the segmented dimming circuit.
  • the reset time of the segmented dimming circuit becomes longer. , reducing the response speed of the segmented dimming circuit.
  • the embodiment of the invention provides a segmented dimming circuit and a dimmable lighting device, which improves the anti-interference performance of the segmented dimming circuit, shortens the reset time of the segmented dimming circuit, and improves the score.
  • the response speed of the segment dimming circuit is not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, a dimmable lighting device, which improves the anti-interference performance of the segmented dimming circuit, shortens the reset time of the segmented dimming circuit, and improves the score.
  • the response speed of the segment dimming circuit is a dimmable lighting device.
  • An embodiment of the present invention provides a segmented dimming circuit, including a segmentation dimming unit, an anti-interference unit, and a discharge resistor;
  • the anti-jamming unit includes a first resistor and a first capacitor connected in parallel with the first resistor, one end of the first resistor is connected to the segmented dimming unit, and the other end of the first resistor is grounded;
  • the segmented dimming unit includes a second capacitor and a segmented dimming chip, one end of the second capacitor is connected to the segmented dimming chip, and the second capacitor is further One end is grounded, the second capacitor is used to supply power to the segmented dimming chip; and the discharge resistor is connected in parallel with the second capacitor for discharging the second capacitor.
  • the segmented dimming circuit further includes an input unit, and the input unit includes: an electromagnetic compatibility module and a rectification filtering module;
  • the electromagnetic compatibility module includes a first inductor; a first end of the first inductor is connected to a power source, a second end of the first inductor is connected to the rectifying filter module; and the rectifying and filtering module includes a rectifier bridge and a third capacitor And a fourth capacitor; the first end of the rectifier bridge is connected to the second end of the first inductor, the second end of the rectifier bridge is connected to the first end of the third capacitor, and the third end of the rectifier bridge The end is connected to the second end of the third capacitor; the fourth capacitor is connected in parallel with the third capacitor.
  • the electromagnetic compatibility module further includes a second inductor and a third resistor;
  • a first end of the second inductor is connected to the second end of the rectifier bridge, a second end of the second inductor is connected to the segmented dimming unit; and the third resistor is connected in parallel with the second inductor .
  • the segmentation dimming unit further includes: a startup module and a switch driving module;
  • the startup module includes at least a fourth resistor; one end of the fourth resistor is connected to the input unit, and the other end of the fourth resistor is connected to the segmented dimming chip;
  • the switch driving module includes a sixth resistor a transistor and a first diode; one end of the sixth resistor is connected to the segmented dimming chip, the other end of the sixth resistor is connected to a gate of the transistor; and the first pole of the transistor is connected
  • the input unit, the second pole of the transistor is respectively connected to the segmented dimming chip and the negative pole of the first diode; the anode of the first diode is grounded.
  • the segmented dimming chip is also grounded through a fifth capacitor.
  • the segmented dimming chip is further connected to the input unit by a fifth resistor.
  • the segmented dimming circuit further includes an output unit, the output unit includes: a third inductor and a sixth capacitor; and the first end of the third inductor is connected to the segmented dimming unit, The second end of the third inductor is connected to the sixth capacitor, and the sixth capacitor is connected in parallel with the light emitting device.
  • the output unit further includes a seventh capacitor and a seventh resistor
  • One end of the seventh resistor is connected to the second end of the third inductor, and the other end is grounded; the seventh capacitor is connected in parallel with the seventh resistor; the seventh resistor and the seventh capacitor are both Connected in parallel with the sixth capacitor.
  • the segmented dimming circuit further includes a feedback detecting unit, and the feedback detecting unit includes: an output sampling feedback module and a detecting module;
  • the output sampling feedback module includes at least an eighth resistor; one end of the eighth resistor is connected to the second pole of the transistor, and the other end of the eighth resistor is connected to the first end of the third inductor;
  • the detecting module includes a second diode, a ninth resistor and a tenth resistor; the third inductor further includes a variable end, and an anode of the second diode is connected to the variable end of the third inductor, a cathode of the second diode is connected to one end of the ninth resistor; the other end of the ninth resistor is connected to one end of the second capacitor; and one end of the tenth resistor is connected to the variable end of the third inductor The other end of the tenth resistor is connected to the segmented dimming chip.
  • Another aspect of an embodiment of the present invention provides a dimmable lighting device including a dimming circuit, which is any of the segmented dimming circuits described above.
  • the embodiment of the present invention adds a discharge resistor in parallel with the second capacitor in the segmented dimming circuit. If the accumulated amount of power on the second capacitor is too large, the second capacitor is completed in a segmented manner. After the power supply of the dimming chip, the excess power of the second capacitor can be quickly discharged through the discharge resistor, shortening the reset time of the segmented dimming chip, and improving the response speed of the segmented dimming circuit.
  • FIG. 1 is a schematic structural diagram of a segmentation type dimming circuit according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a segmentation dimming circuit according to another embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a circuit connection structure of a dimming circuit according to an embodiment of the present invention.
  • the segmented dimming circuit provided by the embodiment of the present invention includes a segmentation dimming unit 11, an anti-interference unit 12, and a discharge resistor R2.
  • the anti-interference unit 12 includes a first resistor R1 and a first capacitor C1 connected in parallel with the first resistor R1. One end of the first resistor R1 is connected to the segmented dimming unit 11, and the other end of the first resistor R1 is grounded.
  • the interference unit 12 is configured to filter interference when interference occurs in the segmented dimming circuit;
  • the segmented dimming unit 11 includes a second capacitor C2 and a segmented dimming chip 112. One end of the second capacitor C2 is connected to the segmented dimming chip 112, and the other end of the second capacitor C2 is grounded, and the second capacitor C2 is connected. Used to power the segmented dimming chip 112;
  • the discharge resistor R2 is connected in parallel with the second capacitor C2 for discharging the second capacitor C2.
  • the segmented dimming circuit provided by the embodiment of the invention adds a discharge resistor connected in parallel with the second capacitor in the segmented dimming circuit, so that if the accumulated capacity of the second capacitor is too large, the segmentation is completed in the second capacitor. After the power supply of the dimming chip is enabled, the excess capacity of the second capacitor can be quickly discharged by the discharge resistor, which shortens the reset time of the segmented dimming chip, thereby improving the response speed of the segmented dimming circuit.
  • segmented dimming circuit provided by the embodiment of the present invention can be used to adjust various light-emitting devices that are driven by voltage or current, such as an incandescent lamp, an LED (Light Emitting Diode) lamp, or Fluorescent lamps, etc.
  • voltage or current such as an incandescent lamp, an LED (Light Emitting Diode) lamp, or Fluorescent lamps, etc.
  • LED Light Emitting Diode
  • Fluorescent lamps etc.
  • the embodiment of the invention is not specifically limited.
  • the segmented dimming chip 112 provided by the embodiment of the present invention may be a two-stage dimming chip or a three-stage dimming chip.
  • the embodiment of the present invention uses a two-stage dimming chip as an example for description. In an actual application, the selection may be made according to a specific situation, which is not limited by the embodiment of the present invention.
  • the structure diagram of the two-stage dimming chip can be as shown in FIG. 3, the chip Including eight pins, of which the first pin is used to supply power to the chip; the second pin is used to output the signal of the control switch; the third pin is used to receive the sampling feedback signal at the output; the fourth pin is used to start Signal; the 5th pin is used to control whether dimming; the 6th pin can be used to stabilize the chip; the 7th pin is the ground; the 8th pin is used to receive the detection current;
  • the dimming chip can output different voltages or currents to the light emitting device according to the user's operation, thereby achieving the purpose of segmental dimming.
  • the discharge resistor R2 is connected in parallel with the second capacitor C2.
  • the one end of the discharge resistor R2 is connected to the first pin of the segmented dimming chip 112, and the other end of the discharge resistor R2 is grounded.
  • the first pin of the segmented dimming chip 112 is a chip operating voltage pin, and the second capacitor C2 provides an operating voltage to the segmented dimming chip 112 through the pin.
  • the optional range of the discharge resistor R2 is greater than or equal to 80K, less than or equal to 150K. In actual use, it can be selected according to specific functional requirements (such as reset time, etc.). For example, if the reset time of the circuit is required to be short, the value of the discharge resistor R2 can be increased. If the reset time of the circuit is required to be long, the value of the discharge resistor R2 can be adjusted to be small. Preferably, when the discharge resistor R2 takes a value of 100K, the reset time of the segmented dimming circuit is about ten seconds, which is in a reasonable range.
  • the optional range of the second capacitor C2 is greater than or equal to 22 uF and less than or equal to 47 uF.
  • the capacitor can be an electrolytic capacitor, because the evaporation of the electrolyte will cause a decrease in capacitance over time. Therefore, the second capacitor C2 can be an electrolytic capacitor with a capacitance of 47 uF, which can ensure the service life of the product. The content value is always within 22uF-47uF.
  • R2 is a discharge resistor
  • C2 is a second capacitor
  • V0 is an initial voltage of a first pin of the segmented dimming chip 112
  • V1 is a first tube of the segmented dimming chip 112 when R2 and C2 are not added.
  • the voltage of the foot, Vt is the voltage of the first pin of the segmented dimming chip 112 after R2 and C2 are added.
  • the anti-interference unit 12 Since the anti-interference unit 12 is added to the segmented dimming circuit, the electric charge accumulated on the second capacitor C2 is more during the application of the circuit. After the triggering of the segmented dimming chip 112 is completed, the first There will be more excess power on the two capacitors C2. It takes a long time to release the excess power. This makes the reset time of the circuit longer and the response speed slower. Therefore, the discharge resistor R2 is connected in parallel to the second capacitor C2. The second capacitor C2 can be quickly discharged, so that the segmented dimming circuit is quickly reset during the dimming process. The introduction of the discharge resistor R2 shortens the reset time of the circuit and improves the response speed of the circuit.
  • the segmented dimming chip 112 is a two-stage dimming chip, the first resistor R1 in the anti-interference unit 12 and the segment in the segmented dimming unit 11 The fifth pin of the dimming chip 112 is connected.
  • the fifth pin of the segmented dimming chip 112 is a clock signal pin for controlling whether to perform dimming.
  • the grounding terminal may have unknown interference, and thus may be without user operation. So that the segmented dimming circuit produces an automatic jump.
  • the anti-interference unit 12 formed by the first resistor R1 and the first capacitor C1 can effectively filter out these interferences and play a filtering role, thereby preventing the segmentation dimming circuit from automatically jumping when subjected to external interference.
  • the optional range of the first resistor R1 is greater than or equal to 100K and less than or equal to 120K.
  • the optional range of the first capacitor C1 is greater than or equal to 150 nF and less than or equal to 300 nF.
  • the anti-interference unit 12 can achieve a better filtering effect.
  • the segmented dimming circuit further includes an input unit 13, and the input unit 13 may include an electromagnetic compatibility module 131 and a rectification filtering module 132.
  • the electromagnetic compatibility module 131 may include a first inductor L1.
  • the first end of the first inductor L1 is connected to the power source, and the second end of the first inductor L1 is connected to the rectifying filter module 132.
  • the first inductor L1 can adopt a common mode inductor.
  • the rectification and filtering module 132 may include a rectifier bridge D and a third capacitor C3. And a fourth capacitor C4.
  • the first end of the rectifier bridge D is connected to the second end of the first inductor L1
  • the second end of the rectifier bridge D is connected to the first end of the third capacitor C3
  • the third end of the rectifier bridge D is connected to the third capacitor C3.
  • the second terminal C4 is connected in parallel with the third capacitor C3.
  • the electromagnetic compatibility module may further include a second inductor L2 and a third resistor R3; the first end of the second inductor L2 is connected to the second end of the rectifier bridge D, and the second inductor L2 is second. The end is connected to the segmented dimming unit 11; the third resistor R3 is connected in parallel with the second inductor L2.
  • the second inductor L2 can adopt a differential mode inductor.
  • the mutual cooperation of the electromagnetic compatibility module 131 and the rectifying and filtering module 132 in the input unit 13 can effectively filter out the noise of the input source and achieve stable input of the signal.
  • the segmented dimming unit 11 may further include: a switch driving module 111 and a starting module 113.
  • the switch driving module 111 may include a sixth resistor R6, a transistor Q1, and a first diode D1.
  • the sixth resistor R6 has one end connected to the segmented dimming chip 112, and the other end of the sixth resistor R6 is connected to the gate of the transistor Q1.
  • the first pole of the transistor Q1 is connected to the input unit 13, that is, connected to the second inductor L2, and the second pole of the transistor Q1 is connected to the segmented dimming chip 112 and the cathode of the first diode D1, respectively.
  • the anode of the first diode D1 is grounded.
  • the segmented dimming chip 112 can adopt a two-stage dimming chip, a three-stage dimming chip or other segmented dimming chip.
  • the connection mode can be as shown in FIG. 3, the chip includes eight pins, wherein the first pin is respectively connected to the second capacitor C2 and the discharge resistor R2; The second pin is connected to the gate of the transistor Q1 through the sixth resistor R6; the third pin is connected to the eighth resistor R8; and the fourth pin is connected to the first pole of the transistor Q1 through the fifth resistor R5.
  • the fifth pin is connected to one end of the fourth resistor R4; the sixth pin is connected to the fifth capacitor C5; the seventh pin is the ground terminal; and the eighth pin is connected to the resistor R10.
  • the transistor Q1 used in the embodiment of the present invention may be a thin film transistor or a field effect transistor or other devices having the same characteristics. This embodiment of the present invention does not limit this.
  • the startup module 113 can include at least a fourth resistor R4.
  • the fourth resistor R4 has one end connected to the second inductor L2 in the input unit 13 and the other end connected to the segmented dimming chip 112.
  • the fourth resistor R4 is generally required to be a resistor having a large resistance value. If it is not easily obtained in reality, a resistor R11 may be connected in series with the fourth resistor R4 to obtain a larger resistance value.
  • segmented dimming circuit such a segmented dimming unit 11 is adopted, which can output various voltages or currents for the light emitting device, and the user can select the brightness through the switch as needed, and the dimming purpose is relatively easy. .
  • the segmented dimming circuit further includes an output unit 14, and the output unit 14 may include a third inductor L3 and a sixth capacitor C6.
  • the first end of the third inductor L3 is connected to the segmented dimming unit 11, the second end of the third inductor L3 is connected to the sixth capacitor C6, and the sixth capacitor C6 is connected in parallel with the light emitting device.
  • the output unit 14 may further include a seventh capacitor C7 and a seventh resistor R7; one end of the seventh resistor R7 is connected to the second end of the third inductor L3, and the other end is grounded; the seventh capacitor C7 is connected in parallel with the seventh resistor R7; the seventh resistor R7 and the seventh capacitor C7 are both connected in parallel with the sixth capacitor C6.
  • the segmented dimming circuit may further include: a feedback detecting unit 16 .
  • the feedback detecting unit 16 is connected to the segmented dimming unit 11 and the output unit 14, respectively, such that the segmented dimming unit 11 adjusts the output signal according to the feedback signal of the output unit 14.
  • the feedback detecting unit 16 may further include: an output sampling feedback module 161 and a detecting module 162.
  • the output sample feedback module 161 may further include at least an eighth resistor R8.
  • One end of the eighth resistor R8 is connected to the second pole of the transistor Q1, and the other end of the eighth resistor R8 is connected to the first end of the third inductor L3.
  • the resistor of the resistance value cannot be directly obtained in practical applications, and a resistor R12 can be connected in parallel with the eighth resistor R8 to obtain a suitable resistor. value.
  • the detection module 162 may further include a second diode D2, a ninth resistor R9, and a tenth resistor R10.
  • the anode of the second diode D2 is connected to the variable end of the third inductor L3, and the cathode of the second diode D2 is connected to the ninth resistor R9.
  • the other end of the ninth resistor R9 is connected to one end of the second capacitor C2.
  • One end of the tenth resistor R10 is connected to the variable end of the third inductor L3, and the other end of the tenth resistor R10 is connected to the dimming chip 122.
  • the segmented dimming circuit provided by the embodiment of the invention has a discharge resistor connected in parallel with the second capacitor of the segmented dimming circuit, and the discharge resistor can be accelerated when the second capacitor has excess power to be released.
  • the discharge speed of the capacitor makes the segmented dimming circuit quickly reset, which solves the problem that the reset time of the circuit becomes longer due to the introduction of the anti-interference module in the prior art, and the segmented dimming circuit is greatly improved. The speed of response.
  • Embodiments of the present invention also provide a dimmable lighting device, including a dimming circuit.
  • the dimming circuit can be any of the above-described segmented dimming circuits.
  • the dimmable lighting device adopting the segmented dimming circuit can output different voltages or currents through the segmented dimming circuit, and provides various brightness selections for the lamp, and the user can control the dimming through the switch as needed.
  • the segmented dimming circuit has been described in detail above and will not be described again here.
  • the segmented dimming function is realized by a segmented dimming circuit, and the discharge resistor is introduced in the segmented dimming circuit, thereby effectively shortening the circuit.
  • the reset time solves the problem that the reset time of the circuit caused by the introduction of the anti-interference module in the prior art becomes longer and the response speed becomes slower, which greatly improves the response speed of the segmented dimming circuit, so that the lighting device reaches a higher level. Fast, better dimming effect.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

一种分段式调光电路及可调光照明设备。该分段式调光电路包括分段式调光单元（11）、抗干扰单元（12）、放电电阻（R2）；抗干扰单元（12）包括第一电阻（R1）和与第一电阻（R1）并联的第一电容（C1），第一电阻（R1）的一端与分段式调光单元（11）连接，第一电阻（R1）的另一端接地；分段式调光单元（11）包括第二电容（C2）和分段式调光芯片（112），第二电容（C2）的一端与分段式调光芯片（112）连接，第二电容（C2）的另一端接地，第二电容（C2）用于为分段式调光芯片（112）供电；放电电阻（R2）与第二电容（C2）并联，用于为第二电容（C2）放电。

Description

分段式调光电路及可调光照明设备 技术领域
本发明涉及调光技术领域，尤其涉及一种分段式调光电路及可调光照明设备。
背景技术
随着科学技术的发展，人们的生活质量在不断提高，对于照明灯具的应用需求也在不断增加。调光技术作为一种发展较成熟的技术被广泛应用在各种灯具上。常用的调光技术有可控硅调光、线性调光、PWM(pulse width modulation，脉冲宽度调制)调光、遥控调光和分段式调光等。其中，分段式调光技术采用开关控制调光，且不需要改变现有的安装方式，操作方便，实现简单，已成为主流调光技术。
分段式调光技术通过在灯具开关内部集成的分段式调光电路来实现调光的目的。分段式调光电路可以为灯具提供多种亮度选择，用户可以根据需要通过开关控制调光。但是，在灯具的使用过程中，分段式调光电路容易受到外界干扰，使得灯具会在没有用户操作的情况下产生跳变。为了增强分段式调光电路的抗干扰性，现有技术在分段式调光电路中设计了抗干扰模块，然而由于引入了抗干扰模块，使得分段式调光电路的复位时间变长，降低了分段式调光电路的响应速度。
发明内容
本发明的实施例提供一种分段式调光电路及可调光照明设备，在提高分段式调光电路抗干扰性能的同时，缩短了分段式调光电路的复位时间，提高了分段式调光电路的响应速度。
本发明实施例一方面提供一种分段式调光电路，包括分段式调光单元，抗干扰单元，放电电阻；
所述抗干扰单元包括第一电阻和与所述第一电阻并联的第一电容，所述第一电阻的一端与所述分段式调光单元连接，所述第一电阻的另一端接地；所述分段式调光单元包括第二电容和分段式调光芯片，所述第二电容的一端与所述分段式调光芯片连接，所述第二电容的另 一端接地，所述第二电容用于为所述分段式调光芯片供电；所述放电电阻与所述第二电容并联，用于为所述第二电容放电。
可选的，所述分段式调光电路还包括输入单元，所述输入单元包括：电磁兼容模块和整流滤波模块；
所述电磁兼容模块包括第一电感；所述第一电感的第一端连接电源，所述第一电感的第二端连接所述整流滤波模块；所述整流滤波模块包括整流桥、第三电容和第四电容；所述整流桥的第一端连接所述第一电感的第二端，所述整流桥的第二端连接所述第三电容的第一端，所述整流桥的第三端连接所述第三电容的第二端；所述第四电容与所述第三电容并联。
可选的，所述电磁兼容模块还包括第二电感和第三电阻；
所述第二电感的第一端连接所述整流桥的第二端，所述第二电感的第二端连接所述分段式调光单元；所述第三电阻与所述第二电感并联。
可选的，所述分段式调光单元还包括：启动模块和开关驱动模块；
所述启动模块至少包括第四电阻；所述第四电阻的一端连接所述输入单元，所述第四电阻的另一端连接所述分段式调光芯片；所述开关驱动模块包括第六电阻、晶体管和第一二极管；所述第六电阻的一端连接所述分段式调光芯片，所述第六电阻的另一端连接所述晶体管的栅极；所述晶体管的第一极连接所述输入单元，所述晶体管的第二极分别连接所述分段式调光芯片以及所述第一二极管的负极；所述第一二极管的正极接地。
可选的，所述分段式调光芯片还通过第五电容接地。
可选的，所述分段式调光芯片还通过第五电阻连接所述输入单元。
可选的，所述分段式调光电路还包括输出单元，所述输出单元包括：第三电感和第六电容；所述第三电感的第一端连接所述分段式调光单元，所述第三电感的第二端与所述第六电容连接，所述第六电容与发光器件并联。
可选的，所述输出单元还包括第七电容和第七电阻；
所述第七电阻的一端与所述第三电感的第二端连接，另一端接地；所述第七电容与所述第七电阻并联；所述第七电阻和所述第七电容均 与所述第六电容并联。
可选的，所述分段式调光电路还包括反馈检测单元，所述反馈检测单元包括：输出取样反馈模块和检测模块；
所述输出取样反馈模块包括至少第八电阻；所述第八电阻的一端连接所述晶体管的第二极，所述第八电阻的另一端与所述第三电感的第一端连接；所述检测模块包括第二二极管、第九电阻和第十电阻；所述第三电感还包括可变端，所述第二二极管的正极连接所述第三电感的可变端，所述第二二极管的负极连接所述第九电阻的一端；所述第九电阻的另一端连接所述第二电容的一端；所述第十电阻的一端连接所述第三电感的可变端，所述第十电阻的另一端连接所述分段式调光芯片。
本发明实施例的另一方面提供一种可调光照明设备，包括调光电路，所述调光电路为以上所述的任意一种分段式调光电路。
相较于现有技术，本发明实施例在分段式调光电路中添加了与第二电容并联的放电电阻，若第二电容上积累的电量过大，在第二电容完成对分段式调光芯片的供电之后，能够通过放电电阻将第二电容的多余电量快速的放掉，缩短了分段式调光芯片的复位时间，提高了分段式调光电路的响应速度。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种分段式调光电路的结构示意图；
图2为本发明又一实施例提供的一种分段式调光电路的结构示意图；
图3为本发明实施例提供的一种调光电路的电路连接结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例提供的分段式调光电路，如图1所示，包括分段式调光单元11，抗干扰单元12，放电电阻R2。
其中，抗干扰单元12包括第一电阻R1和与第一电阻R1并联的第一电容C1，第一电阻R1的一端与分段式调光单元11连接，第一电阻R1的另一端接地，抗干扰单元12用于当分段式调光电路中出现干扰时过滤干扰；
分段式调光单元11包括第二电容C2和分段式调光芯片112，第二电容C2的一端与分段式调光芯片112连接，第二电容C2的另一端接地，第二电容C2用于为分段式调光芯片112供电；
参考图1所示，放电电阻R2与第二电容C2并联，用于为第二电容C2放电。
本发明实施例提供的分段式调光电路在分段式调光电路中添加了与第二电容并联的放电电阻，从而若第二电容积累的电量过大，在第二电容完成对分段式调光芯片的供电之后，能够通过放电电阻将第二电容的多余电量快速的放掉，缩短了分段式调光芯片的复位时间，从而提高了分段式调光电路的响应速度。
需要说明的是，第一、本发明实施例提供的分段式调光电路可以用于调节各种利用电压或电流驱动的发光器件，例如白炽灯，LED(Light Emitting Diode，发光二极管)灯或荧光灯等。本发明实施例不做具体限制。
第二、本发明实施例提供的分段式调光芯片112可以是二段式调光芯片或三段式调光芯片等，本发明实施例以二段式调光芯片为例进行说明，在实际应用中，可以根据具体情况进行选择，本发明实施例对此不做限定。
具体的，二段式调光芯片的结构示意图可以如图3所示，该芯片 包括八个管脚，其中，第1管脚用于向芯片供电；第2管脚用于输出控制开关的信号；第3管脚用于接收输出端的取样反馈信号；第4管脚用于启动信号；第5管脚用于控制是否进行调光；第6管脚可以起到稳定芯片工作的作用；第7管脚为接地端；第8管脚用于接收检测电流；使用这种分段式调光芯片，电路可以根据用户的操作向发光器件输出不同的电压或电流，从而达到分段调光的目的。
示例的，参考图3所示，放电电阻R2与第二电容C2并联。其中，放电电阻R2的一端连接分段式调光芯片112的第一管脚，放电电阻R2的另一端接地。
需要说明的是，分段式调光芯片112的第一管脚为芯片工作电压管脚，第二电容C2通过此管脚向分段式调光芯片112提供工作电压。放电电阻R2取值的可选范围为大于或等于80K，小于或等于150K，在实际使用中，可以根据具体的功能需求(例如复位时间等)进行选择。例如，如果需要电路的复位时间短，就可以将放电电阻R2的值调大，如果需要电路的复位时间长，就可以将放电电阻R2的值调小。优选的，当放电电阻R2取值为100K时，分段式调光电路的复位时间为十秒左右，处于一个较合理的范围。
其中，第二电容C2取值的可选范围为大于或等于22uF，小于或等于47uF。可选的，该电容可以采用电解电容，因为随着时间的推移电解液挥发会导致容值减小，所以，第二电容C2可以选用容值为47uF的电解电容，这样可以保证在产品使用寿命内容值始终在22uF-47uF内。
所述芯片的复位时间与放电电阻R2、第二电容C2的关系如公式(1)所示，
T＝R2*C2*ln[(V1-V0)/(V1-Vt)]                  (1)
其中，R2为放电电阻，C2为第二电容，V0为分段式调光芯片112的第一管脚的初始电压，V1为不加入R2和C2时分段式调光芯片112的第一管脚的电压，Vt为加入R2和C2后分段式调光芯片112的第一管脚的电压。由公式(1)可知，当V0，V1，Vt的值为定值，并且已知放电电阻R2和第二电容C2的值时，可以由公式(1)计算出复位时间T的参考值。实际应用中，复位时间T还与具体的电路有关，最终芯片的 放电时间可能并不完全等于复位时间T的参考值，所述复位时间T的参考值可以作为调试电路的依据。
由于在分段式调光电路中加入抗干扰单元12后，使得在电路的应用过程中，第二电容C2上积累的电荷较多，在完成对分段式调光芯片112的触发之后，第二电容C2上会存在较多的多余电量，要释放掉这些多余电量就需要较长的时间，这使得电路的复位时间变长，响应速度变慢，所以给第二电容C2上并联放电电阻R2，可以使得第二电容C2迅速放电，进而使得分段式调光电路在调光过程中快速复位。放电电阻R2的引入缩短了电路的复位时间，提高了电路的响应速度。
实际应用中，参考图3所示，若分段式调光芯片112为二段式调光芯片时，抗干扰单元12中的第一电阻R1可以与分段式调光单元11中的分段式调光芯片112的第五管脚连接。
需要说明的是，分段式调光芯片112的第五管脚为时钟信号管脚，用于控制是否进行调光。
一般情况下，由于电路中所有的接地端是连接在一起的，当外界电压波动时(例如大功率电器进行开关操作时)，接地端可能会出现未知干扰，进而可能在没有用户操作的情况下，使得分段式调光电路产生自动跳变。通过第一电阻R1和第一电容C1所组成的抗干扰单元12可以有效的滤掉这些干扰，起到滤波的作用，避免了分段式调光电路在受到外界干扰时发生自动跳变。
其中，第一电阻R1取值的可选范围为大于或等于100K，小于或等于120K。第一电容C1取值的可选范围为大于或等于150nF，小于或等于300nF。优选的，当第一电阻R1取值为100K，第一电容C1取值220nF时，抗干扰单元12可以达到较好的滤波效果。
进一步地，如图2所示，分段式调光电路还包括输入单元13，输入单元13可以包括电磁兼容模块131和整流滤波模块132。
如图3所示，其中，电磁兼容模块131可以包括第一电感L1。第一电感L1的第一端连接电源，第一电感L1的第二端连接整流滤波模块132。
优选的，第一电感L1可以采用共模电感。
如图3所示，整流滤波模块132可以包括整流桥D、第三电容C3 和第四电容C4。其中，整流桥D的第一端连接第一电感L1的第二端，整流桥D的第二端连接第三电容C3的第一端，整流桥D的第三端连接第三电容C3的第二端；第四电容C4与第三电容C3并联。
可选的，参考图3所示，电磁兼容模块还可以包括第二电感L2和第三电阻R3；第二电感L2的第一端连接整流桥D的第二端，第二电感L2的第二端连接分段式调光单元11；第三电阻R3与第二电感L2并联。
优选的，第二电感L2可以采用差模电感。
输入单元13中电磁兼容模块131和整流滤波模块132的相互配合可以有效的过滤掉输入源的噪声，实现信号的稳定输入。
进一步地，如图2所示，分段式调光单元11还可以包括：开关驱动模块111和启动模块113。
如图3所示，开关驱动模块111可以包括第六电阻R6、晶体管Q1和第一二极管D1。其中，第六电阻R6的一端连接分段式调光芯片112，第六电阻R6的另一端连接晶体管Q1的栅极。晶体管Q1的第一极连接输入单元13，即与第二电感L2相连接，晶体管Q1的第二极分别连接分段式调光芯片112以及第一二极管D1的负极。第一二极管D1的正极接地。
其中，分段式调光芯片112可以采用二段式调光芯片，三段式调光芯片或其他分段式调光芯片。下面以二段式调光芯片为例进行说明，其连接方式可以参考图3所示，该芯片包括8个管脚，其中，第1管脚分别与第二电容C2以及放电电阻R2相连接；第2管脚通过第六电阻R6与晶体管Q1的栅极相连接；第3管脚连接第八电阻R8；第4管脚通过第五电阻R5与晶体管Q1的第一极相连接。第5管脚连接第四电阻R4的一端；第6管脚连接第五电容C5；第7管脚为接地端；第8管脚与电阻R10连接。
需要说明的是，本发明实施例中采用的晶体管Q1可以为薄膜晶体管或场效应管或其他特性相同的器件。本发明实施例对此不做限定。
启动模块113可以至少包括第四电阻R4。其中，第四电阻R4的一端连接输入单元13中的第二电感L2，另一端连接分段式调光芯片112。
在实际应用中，一般需要第四电阻R4为一个阻值较大的电阻，如果现实中不容易获得，可以在第四电阻R4上串联一个电阻R11，以此来获得较大的阻值。
在分段式调光电路中采用这样一种分段式调光单元11，可以为发光器件输出多种电压或电流，用户可以根据需要通过开关进行亮度选择，比较容易的实现了调光的目的。
进一步地，参考图2所示，分段式调光电路还包括输出单元14，输出单元14可以包括：第三电感L3和第六电容C6。第三电感L3的第一端连接分段式调光单元11，第三电感L3的第二端与第六电容C6连接，第六电容C6与发光器件并联。
可选的，参考图3所示，输出单元14还可以包括第七电容C7和第七电阻R7；第七电阻R7的一端与第三电感L3的第二端连接，另一端接地；第七电容C7与第七电阻R7并联；第七电阻R7和第七电容C7均与第六电容C6并联。
可选的，参考图2所示，分段式调光电路还可以包括：反馈检测单元16。反馈检测单元16分别与分段式调光单元11和输出单元14相连接，以使得分段式调光单元11根据输出单元14的反馈信号调节输出信号。
进一步地，如图2所示，反馈检测单元16还可以包括：输出取样反馈模块161和检测模块162。
其中，输出取样反馈模块161还可以至少包括第八电阻R8。第八电阻R8的一端连接晶体管Q1的第二极，第八电阻R8的另一端连接第三电感L3的第一端。
参考图3所示，由于对第八电阻R8的阻值要求可能较为精确，在实际应用中无法直接获得该阻值的电阻，可以通过在第八电阻R8上并联一个电阻R12来获得合适的阻值。
如图3所示，检测模块162还可以包括第二二极管D2、第九电阻R9和第十电阻R10。第二二极管D2的正极连接第三电感L3的可变端，第二二极管D2的负极连接第九电阻R9。第九电阻R9的另一端连接第二电容C2的一端。第十电阻R10的一端连接第三电感L3的可变端，第十电阻R10的另一端连接调光芯片122。
本发明实施例提供的分段式调光电路，通过在分段式调光电路的第二电容上并联一个放电电阻，当第二电容上有多余的电量需要释放时，放电电阻可以加快第二电容的放电速度，使得分段式调光电路快速复位，解决了由于现有技术在引入了抗干扰模块而造成电路的复位时间变长的问题，很大程度上提高了分段式调光电路的响应速度。
本发明实施例还提供了一种可调光照明设备，包括调光电路。其中，调光电路可以为上述任意一种分段式调光电路。采用该分段式调光电路的可调光照明设备，可以通过分段式调光电路输出不同的电压或电流，为灯具提供多种亮度选择，用户可以根据需要通过开关控制调光。所述分段式调光电路已经在上面做了详细描述，此处不再赘述。
在本发明实施例提供的可调光照明设备中，通过一种分段式调光电路来实现分段调光功能，由于在分段式调光电路中引入放电电阻，有效地缩短了电路的复位时间，解决了现有技术中引入抗干扰模块而造成的电路的复位时间变长、响应速度变慢，很大程度上提高了分段式调光电路的响应速度，使照明设备达到了更快、更好的调光效果。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。
本申请要求于2014年6月26日递交的中国专利申请第201420348387.5号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (10)

  1. 一种分段式调光电路，包括分段式调光单元，抗干扰单元，放电电阻；
    所述抗干扰单元包括第一电阻和与所述第一电阻并联的第一电容，所述第一电阻的一端与所述分段式调光单元连接，所述第一电阻的另一端接地；
    所述分段式调光单元包括第二电容和分段式调光芯片，所述第二电容的一端与所述分段式调光芯片连接，所述第二电容的另一端接地，所述第二电容用于为所述分段式调光芯片供电；
    所述放电电阻与所述第二电容并联，用于为所述第二电容放电。
  2. 根据权利要求1所述的分段式调光电路，还包括输入单元，所述输入单元包括：电磁兼容模块和整流滤波模块；
    所述电磁兼容模块包括第一电感；
    所述第一电感的第一端连接电源，所述第一电感的第二端连接所述整流滤波模块；
    所述整流滤波模块包括整流桥、第三电容和第四电容；
    所述整流桥的第一端连接所述第一电感的第二端，所述整流桥的第二端连接所述第三电容的第一端，所述整流桥的第三端连接所述第三电容的第二端；所述第四电容与所述第三电容并联。
  3. 根据权利要求2所述的分段式调光电路，所述电磁兼容模块还包括第二电感和第三电阻；
    所述第二电感的第一端连接所述整流桥的第二端，所述第二电感的第二端连接所述分段式调光单元；所述第三电阻与所述第二电感并联。
  4. 根据权利要求2或3所述的分段式调光电路，
    所述分段式调光单元还包括：启动模块和开关驱动模块；
    所述启动模块至少包括第四电阻；
    所述第四电阻的一端连接所述输入单元，所述第四电阻的另一端连接所述分段式调光芯片；
    所述开关驱动模块包括第六电阻、晶体管和第一二极管；
    所述第六电阻的一端连接所述分段式调光芯片，所述第六电阻的 另一端连接所述晶体管的栅极；所述晶体管的第一极连接所述输入单元，所述晶体管的第二极分别连接所述分段式调光芯片以及所述第一二极管的负极；所述第一二极管的正极接地。
  5. 如权利要求2或3所述的分段式调光电路，其中所述分段式调光芯片通过第五电容接地。
  6. 如权利要求2或3所述的分段式调光电路，其中所述分段式调光芯片通过第五电阻连接所述输入单元。
  7. 根据权利要求4所述的分段式调光电路，还包括输出单元，所述输出单元包括：第三电感和第六电容；
    所述第三电感的第一端连接所述分段式调光单元，所述第三电感的第二端与所述第六电容连接，所述第六电容与发光器件并联。
  8. 根据权利要求7所述的分段式调光电路，所述输出单元还包括第七电容和第七电阻；
    所述第七电阻的一端与所述第三电感的第二端连接，另一端接地；
    所述第七电容与所述第七电阻并联；
    所述第七电阻和所述第七电容均与所述第六电容并联。
  9. 根据权利要求7或8所述的分段式调光电路，还包括反馈检测单元，所述反馈检测单元包括：输出取样反馈模块和检测模块；
    所述输出取样反馈模块包括至少第八电阻；
    所述第八电阻的一端连接所述晶体管的第二极，所述第八电阻的另一端与所述第三电感的第一端连接；
    所述检测模块包括第二二极管、第九电阻和第十电阻；
    所述第三电感还包括可变端，所述第二二极管的正极连接所述第三电感的可变端，所述第二二极管的负极连接所述第九电阻的一端；
    所述第九电阻的另一端连接所述第二电容的一端；
    所述第十电阻的一端连接所述第三电感的可变端，所述第十电阻的另一端连接所述分段式调光芯片。
  10. 一种可调光照明设备，包括如权利要求1-9任意一项权利要求所述的分段式调光电路。
PCT/CN2014/087631 2014-06-26 2014-09-28 分段式调光电路及可调光照明设备 WO2015196609A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201420348387.5 2014-06-26
CN201420348387.5U CN203912292U (zh) 2014-06-26 2014-06-26 一种分段式调光电路及可调光照明设备

Publications (1)

Publication Number Publication Date
WO2015196609A1 true WO2015196609A1 (zh) 2015-12-30

Family

ID=51786533

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/087631 WO2015196609A1 (zh) 2014-06-26 2014-09-28 分段式调光电路及可调光照明设备

Country Status (2)

Country Link
CN (1) CN203912292U (zh)
WO (1) WO2015196609A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110719664A (zh) * 2019-11-15 2020-01-21 北京模电半导体有限公司 开关分段调色调光恒流控制器集成电路
CN113604788A (zh) * 2021-07-27 2021-11-05 北京北方华创微电子装备有限公司 基座偏压调节装置和方法、半导体工艺设备
CN116546687A (zh) * 2023-07-07 2023-08-04 广东东菱电源科技有限公司 多机并联三合一电流调节抗干扰电路

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2798490Y (zh) * 2005-06-07 2006-07-19 谭浩垣 Led台灯
CN201039532Y (zh) * 2007-04-25 2008-03-19 鹤山丽得电子实业有限公司 一种led调光装置
CN101801129A (zh) * 2010-01-28 2010-08-11 海洋王照明科技股份有限公司 一种led小功率驱动电路及led灯具
JP2012169195A (ja) * 2011-02-16 2012-09-06 Toyoda Gosei Co Ltd Ｌｅｄ調光用点灯装置
CN202998600U (zh) * 2012-12-20 2013-06-12 南京吉山光电科技有限公司 一种led调光灯
CN203446057U (zh) * 2013-08-15 2014-02-19 京东方科技集团股份有限公司 一种调光电路及可调光照明设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2798490Y (zh) * 2005-06-07 2006-07-19 谭浩垣 Led台灯
CN201039532Y (zh) * 2007-04-25 2008-03-19 鹤山丽得电子实业有限公司 一种led调光装置
CN101801129A (zh) * 2010-01-28 2010-08-11 海洋王照明科技股份有限公司 一种led小功率驱动电路及led灯具
JP2012169195A (ja) * 2011-02-16 2012-09-06 Toyoda Gosei Co Ltd Ｌｅｄ調光用点灯装置
CN202998600U (zh) * 2012-12-20 2013-06-12 南京吉山光电科技有限公司 一种led调光灯
CN203446057U (zh) * 2013-08-15 2014-02-19 京东方科技集团股份有限公司 一种调光电路及可调光照明设备

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110719664A (zh) * 2019-11-15 2020-01-21 北京模电半导体有限公司 开关分段调色调光恒流控制器集成电路
CN113604788A (zh) * 2021-07-27 2021-11-05 北京北方华创微电子装备有限公司 基座偏压调节装置和方法、半导体工艺设备
CN116546687A (zh) * 2023-07-07 2023-08-04 广东东菱电源科技有限公司 多机并联三合一电流调节抗干扰电路
CN116546687B (zh) * 2023-07-07 2023-09-19 广东东菱电源科技有限公司 多机并联三合一电流调节抗干扰电路

Also Published As

Publication number Publication date
CN203912292U (zh) 2014-10-29

Similar Documents

Publication Publication Date Title
US8872444B2 (en) Lighting device for solid-state light source and illumination apparatus including same
TWI489911B (zh) 可全相位啟動三極交流開關之主動洩流電路及使用該主動洩流電路之發光元件電源供應電路與三極交流開關控制方法
CN103298195A (zh) 照明用电源以及照明器具
US11528791B2 (en) Driving circuit
CN103260316B (zh) 一种双回路限流驱动电路和双回路限流驱动方法
TWI507082B (zh) 控制對發光二極體光源供電的控制器及方法、及可攜式照明裝置
WO2016045644A1 (zh) 一种母线电流控制电路、恒流驱动控制器及led光源
CN105592598A (zh) 高功率因数、无频闪的led驱动电路
WO2015196609A1 (zh) 分段式调光电路及可调光照明设备
CN105451409A (zh) 兼容电感、电子镇流器的直管led电源
KR101414902B1 (ko) 교류 led 구동회로
CN205071365U (zh) 发光二极管照明驱动电路及灯具
US11602021B2 (en) Linear drive circuit and led light having the same
US10440785B2 (en) Current holding circuit for bidirectional triode thyristor dimmer and linear dimming driving circuit using the same
KR20140135453A (ko) 다수의 ｌｅｄ 모듈을 구동하는 전원 공급 장치와 이를 구비하는 led 조명 장치
CN105764198A (zh) 一种轨道车辆车厢led照明驱动电源
CN203279292U (zh) 一种双回路限流驱动电路
US10856397B2 (en) Lighting apparatus with wireless module
CN203596940U (zh) 带功率因数校正的led恒流源驱动器
CN108768374B (zh) 简式墙壁单火线触摸开关电路
CN105828472A (zh) 一种抗干扰led路灯电路
US20240090097A1 (en) Synchronous starting circuit and constant current depth dimming power supply
CN204707313U (zh) 一种led保护电路
CN203984731U (zh) 发光亮度段级控制电路及分段调光的照明系统
CN203574921U (zh) 可调光的无极灯驱动电路

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14896175

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 11/07/2017)

122 Ep: pct application non-entry in european phase

Ref document number: 14896175

Country of ref document: EP

Kind code of ref document: A1