WO2011150635A1 - 一种led调光器 - Google Patents

一种led调光器 Download PDF

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Publication number
WO2011150635A1
WO2011150635A1 PCT/CN2010/079055 CN2010079055W WO2011150635A1 WO 2011150635 A1 WO2011150635 A1 WO 2011150635A1 CN 2010079055 W CN2010079055 W CN 2010079055W WO 2011150635 A1 WO2011150635 A1 WO 2011150635A1
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WO
WIPO (PCT)
Prior art keywords
switch
sub
led
brightness
dimmer
Prior art date
Application number
PCT/CN2010/079055
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English (en)
French (fr)
Inventor
华桂潮
姚晓莉
任丽君
Original Assignee
英飞特光电（杭州）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.)
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Application filed by 英飞特光电（杭州）有限公司 filed Critical 英飞特光电（杭州）有限公司
Publication of WO2011150635A1 publication Critical patent/WO2011150635A1/zh

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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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light

Definitions

  • the invention belongs to the field of LED control, and in particular relates to an LED dimmer.
  • LEDs are semiconductor optoelectronic components. LEDs have been widely used in the field of lighting because of their relatively simple manufacturing process and low manufacturing cost. LEDs have high light efficiency, safe and reliable operation, and they use electric field illumination, featuring long life, low radiation and low power consumption.
  • the total brightness of the LED illumination area is the ambient brightness and the brightness of the LED itself.
  • the ambient brightness is equal to the brightness of the illumination area after the brightness of the LED is removed, and the brightness of the LED itself refers to the amount of change in the brightness of the area after the light emitted by the LED is irradiated onto the illumination area. Since the driving method of the LED is usually in a constant current manner, adjusting the brightness of the LED is usually achieved by adjusting the output current of the LED driver.
  • the brightness adjustment of the LED is manually adjusted, for example, by manually adjusting the manual adjustment device disposed on the illumination device, changing the chopping angle of the output voltage signal of the dimmer provided in the illumination device to make the LED
  • the driver controls the change of the current output to the LED according to the change of the chopping angle of the dimmer output voltage signal, thereby realizing the purpose of manually adjusting the brightness of the LED.
  • in order to make the brightness of the illumination area reach a certain value it is necessary to manually adjust the brightness of the LED, and the adjustment process is troublesome.
  • an object of the present invention to provide an LED dimmer that can be used to more easily achieve brightness adjustment of an LED.
  • an embodiment of the present invention provides an LED dimmer, including: a brightness setting device, a brightness detector, and a controller, and an output terminal and a controller of the brightness setting device and the brightness detector
  • the input ends are connected, and when the LED dimmer is in the brightness setting state, the common input end of the brightness setting device and the brightness detector is electrically connected to the input end of the dimmer;
  • the brightness setting device is configured to preset a target brightness value of the illumination area;
  • the brightness detector is configured to detect a current ambient brightness value, and the controller is configured to receive a target brightness value of the illumination area and a current ambient brightness value, when currently When the ambient brightness value is smaller than the target brightness value of the illumination area, the difference between the target brightness value of the illumination area and the current ambient brightness is calculated, and the target value of the brightness of the LED itself is obtained, according to the brightness of the LED and the driving current thereof.
  • the current adjustment signal output by the controller to the LED driving power source and reflecting the driving current target value of the LED is specifically: a current adjustment signal including information of the LED driving current target value.
  • the LED dimmer further includes an operating state switch
  • the working state switch includes a first sub-switch and a second sub-switch, the static contact of the first sub-switch and the input of the dimmer
  • the first movable contact of the first sub-switch is connected to the static contact of the second sub-switch, and the first movable contact of the second sub-switch is connected with the third movable contact of the first sub-switch,
  • the second movable contact of one sub-switch and the second movable contact of the second sub-switch are suspended;
  • the static contact of the second sub-switch is also connected to the common end of the brightness setting device and the brightness detector, and the third moving contact of the first sub-switch is connected to a power input end of the LED driving power source;
  • the dimmer is in a brightness setting state when the first sub-switch contacts its first moving contact and the second sub-switch contacts its first moving contact.
  • the LED dimmer further includes an operating state switch and a manual adjusting device
  • the working state switch includes a first sub-switch and a second sub-switch, the static contact of the first sub-switch and the dimming
  • the input end of the first sub-switch is connected to the static contact of the second sub-switch, the first movable contact of the second sub-switch and the third movable contact of the first sub-switch Connecting, the second movable contact of the first sub-switch and the second movable contact of the second sub-switch are suspended;
  • the static contact of the second sub-switch is also connected to the common end of the brightness setting device and the brightness detector, and the third moving contact of the first sub-switch passes the manual adjustment device and the LED driving power source a power input terminal is connected, and the manual adjustment device further outputs a manual brightness adjustment signal to the controller;
  • the dimmer When the first sub-switch contacts its first movable contact and the second sub-switch contacts its first movable contact, the dimmer is in a brightness setting state; When the first sub-switch contacts the third movable contact, and the second sub-switch contacts the second movable contact, the dimmer is in a manual setting state, and the manual adjustment device outputs manual brightness adjustment to the controller.
  • the signal causes the controller to output a current adjustment signal based on the manual brightness adjustment signal.
  • the LED dimmer further includes a dimming switch, and the controller outputs a current adjustment signal to an input end of the LED driving power source through the dimmer switch, and changes the a chopping phase angle of the current adjustment signal; the current adjustment signal output by the controller to the LED driving power source and reflecting the driving current target value of the LED is specifically: having a chopping phase angle corresponding to the driving current target value of the LED Current adjustment signal.
  • the LED dimmer further includes an operating state switch
  • the working state switch includes a first sub-switch and a second sub-switch, the static contact of the first sub-switch and the input of the dimmer
  • the first movable contact of the first sub-switch is connected to the static contact of the second sub-switch, and the first movable contact of the second sub-switch is connected with the third movable contact of the first sub-switch,
  • the second movable contact of one sub-switch and the second movable contact of the second sub-switch are suspended;
  • the static contact of the second sub-switch is also connected to the common end of the brightness setting device and the brightness detector, and the third moving contact of the first sub-switch is connected to a power input end of the LED driving power source;
  • a third movable contact of the first sub-switch is connected to the first end of the dimmer switch, and a second end of the dimming switch is connected to a power input end of the LED driving power source;
  • the controller is connected to the third end of the dimmer switch
  • the dimmer is in a brightness setting state when the first sub-switch contacts its first moving contact and the second sub-switch contacts its first moving contact.
  • the controller is further configured to output a current adjustment signal reflecting that the LED driving current target value is zero when the current ambient brightness is greater than or equal to the target brightness value set by the brightness setting device.
  • the LED driving power source is disposed in the LED dimmer.
  • the present invention it is possible to automatically adjust the brightness of the LED itself such that the brightness of the illumination area is equal to or higher than a preset brightness value.
  • FIG. 1 is a schematic diagram of an embodiment of an LED dimmer provided by the present invention.
  • FIG. 2 is a schematic view of another embodiment of an LED dimmer provided by the present invention.
  • FIG. 3 is a schematic view of another embodiment of an LED dimmer provided by the present invention.
  • FIG. 4 is a schematic view of another embodiment of an LED dimmer provided by the present invention.
  • FIG. 5 is a schematic illustration of another embodiment of an LED dimmer provided by the present invention.
  • Figure 6 is a schematic illustration of another embodiment of an LED dimmer provided by the present invention.
  • FIG. 1 shows a dimmer application scenario provided by this embodiment.
  • the LED 3 is driven by the LED driving power source 2, and the LED driving power source 2 outputs a constant current to the LED 3, that is, the brightness of the LED driving power source 2 to the LED 3 is controlled by changing the amplitude of the output current of the LED driving power source 2.
  • the dimmer 1 provided in this embodiment is connected between the AC power source 4 and the LED driving power source 2.
  • the dimmer 1 has an input terminal ill and a first output end oil and a second output terminal ol2; One end is connected to the input end ill of the dimmer 1 and the other end is connected to the second input end i22 of the LED driving power source 2.
  • the dimmer 1 includes a brightness setting means 11, a brightness detector 12, and a controller 13.
  • the input end ill of the dimmer 1 is connected to one input of the controller 13 via the brightness setting means 11, while the input end ill of the dimmer is also connected to the controller 13 via the brightness detector 12.
  • the output of the controller 13 is connected to a third input terminal i23 of the LED drive power supply.
  • the brightness setting device 11 is for setting the target brightness value L of the irradiation area.
  • the brightness detector 12 is used to detect the current ambient brightness.
  • the controller 13 is configured to receive the target brightness value of the illumination area set by the brightness setting device 11 and the current ambient brightness L c detected by the brightness detector 12, and determine that the current environment is bright. Whether the degree L c is smaller than the target brightness value L set by the brightness setting means 11.
  • the controller 13 inputs a current adjustment signal to the third input terminal i23 of the LED driving power source 2 through the output terminal ol2, wherein the current adjustment signal includes information of a target value of the LED driving current, and the LED driving power source 2 is based on the light source from the dimmer 1
  • the current adjustment signal received in the controller 13 changes the driving current of the output value LED 3, and the changed driving current is equal to the driving current target value included in the received current adjustment signal.
  • the controller 13 When it is determined that the total brightness of the current illumination area detected by the brightness detector 12 is equal to the target brightness value of the illumination area set by the brightness setting device 11, no signal is output, so that the LED driving power source 2 does not change the current output driving current. To maintain the brightness of the current LED 3.
  • the above-described function of the controller 13 can make the total brightness of the illumination area equal to the preset target brightness value.
  • the controller 13 determines that the current ambient brightness is greater than or equal to the target brightness value preset by the brightness setting device 11, the target value of the LED driving current included in the current adjustment signal output by the controller 13 is zero, so that the LED is driven.
  • the power supply 2 After receiving the current adjustment signal, the power supply 2 adjusts the output drive current to zero, so that the LED 3 does not emit light. Since the ambient brightness has reached or exceeded a preset target brightness value, from the viewpoint of power saving, It is no longer necessary to additionally increase the brightness of the illumination area by the LED, so the action of the controller 13 to adjust the output current to zero can effectively save power.
  • the target current value included in the current adjustment signal output by the controller 13 will increase, so that the LED drive
  • the power source 2 increases the output driving current to increase the brightness of the LED 3; if the ambient brightness increases, the target brightness value included in the current adjustment signal output by the controller will decrease, so that the LED driving power source 2 reduces the output.
  • the dimmer 1 can output a current adjustment signal according to the current ambient brightness at any time, so that the LED 3 The sum of its own brightness and ambient brightness is always maintained at the target brightness value.
  • the controller 13 will cause the LED 3 to not emit light, achieving the purpose of energy saving.
  • the LED dimmer 1 preferably has an operating state switch 14 disposed between the input terminal ill and the brightness setting device 11 and the brightness detector 12, the working state switch 14 including two sub-switches, It is referred to as a first sub-switch 14a and a second sub-switch 14b, wherein the first sub-switch 14a is provided with one static contact 141a and three movable contacts, hereinafter referred to as a first movable contact 142a and a second movable contact 143a, respectively.
  • the third movable contact 144a; the second sub-switch 14b is provided with a static contact 141b and two movable contacts, respectively a first movable contact 142b and a second movable contact 143b.
  • the static contact 141a of the first sub-switch 14a is connected to the input end ill of the dimmer, and the first movable contact 142a of the first sub-switch 14a is connected to the stationary contact 141b of the second sub-switch 14b.
  • the first movable contact 142b of the switch 14b is connected to the third movable contact 144a of the first sub-switch 14a, and the static contact 141b of the second sub-switch 14b is also oriented with the brightness setting means 11 and the brightness detector 12.
  • the common end of the light input end ill is connected, the second movable contact 143a of the first sub-switch is suspended, and the second movable contact 143b of the second sub-switch is also suspended.
  • the dimmer 1 When the first sub-switch 14a contacts the first movable contact 142a and the second sub-switch 14b contacts the first movable contact 142b, the dimmer 1 operates in the brightness setting state, and the brightness setting means 11 and the brightness detector 12 And the LED drive power supply is capable of electrical connection to the input ill in the dimmer to power these devices. And the brightness setting means 11, the brightness detector 12 and the controller 13 in the dimmer 1 operate in accordance with the functions mentioned above, realizing automatic adjustment of the brightness of the LED according to the ambient brightness.
  • the brightness detector 12 and the controller 13 in the dimmer are both disconnected from the input terminal ill.
  • the LED driving power source 4 and the input terminal il 1 are electrically connected. Since the LED driving power source 4 does not receive the current adjustment signal output by the controller 13, the LED driving power source 4 outputs a constant driving current to the LED, so LED 3 operates at maximum brightness.
  • the controller 13 in the dimmer 1 either has its own power source (for example, a battery or the like), or draws power from the middle of the LED driving power source, but the latter has a small power supply voltage, so that the controller 13 is more convenient.
  • a power supply signal can be obtained
  • FIG. 2 shows another embodiment of the dimmer provided by the present invention. As shown in FIG. 2, the dimmer 1 in this embodiment is different from the dimmer in FIG. 1 only in that: one end of the controller 13 is added, and the dimming is not connected to the AC power source 4 at the increased end. One end of the input ill of the device is connected.
  • the controller 13 can directly obtain power through the AC power source 4, but it should be noted that although one end of the controller 13 is directly connected to one end of the AC power source 4, When the first sub-switch 14a contacts the second movable contact 143a, since the current loop cannot be formed between the controller 13 and the AC power source 4, the controller 13 still does not operate.
  • FIG. 3 shows another embodiment of the dimmer provided by the present invention, as shown in FIG. As shown, the dimmer 1 differs from the dimmer of FIG.
  • the manual adjustment device 15 When the first sub-switch 14a contacts the third movable contact 144a and the second sub-switch 14b contacts the second movable contact 143b, the manual adjustment device 15 also outputs a manual brightness adjustment signal to the controller 13, which is manually adjusted by the user.
  • the adjusting means 15 can control the change of the current adjustment signal outputted by the controller 13, thereby changing the output driving current of the LED driving power source 2 to change, and changing the brightness of the LED 3 itself.
  • the dimmer in Fig. 3 can not only work in the state of automatically adjusting the brightness of the LED, but also can realize the function of adjusting the brightness of the LED by manual adjustment in another working state.
  • the dimmer of FIG. 3 can also be connected to one end of the controller 13 and connected to the end of the input terminal ill of the AC power source 4 to which the dimmer is not connected, so that the controller 13 can pass the AC power source. 4 directly get the power.
  • FIG. 4 shows an application scenario of another dimmer provided in this embodiment.
  • the dimmer in this embodiment differs from the above embodiments in the form of a current adjustment signal output by the controller in the dimmer.
  • the current adjustment signal outputted from the controller directly includes the target current value information, and the controller in this embodiment changes the chopping of the current adjustment signal by controlling the dimmer switch. Phase angle, the target current value information is transmitted to the LED driving power source. Therefore, different from the other embodiments, the current adjustment signal in this embodiment is a chopping voltage output from the dimmer switch to the LED driving power source, and the difference in the target current value included in the current adjustment signal is The specific embodiment is embodied as the difference in the phase angle of the chopping voltage.
  • the LED 3 is driven by the LED driving power source 2, and the LED driving power source 2 outputs a constant current to the LED 3, that is, the LED driving power source 2 controls the brightness of the LED 3 by changing the LED driving power source 2
  • the magnitude of the output current is achieved.
  • the dimmer 1 provided in this embodiment is connected between the AC power source 4 and the LED driving power source 2.
  • the dimmer 1 has an input il2 and an output 013.
  • One end of the AC power source 4 is connected to the input terminal il2 of the dimmer 1 , and the other end is connected to the second input terminal i25 of the LED driving power source 2 .
  • the dimmer 1 includes a brightness setting device 11, a brightness detector 12, a controller 13 and a dimming switch
  • the input terminal il2 of the dimmer 1 When in the brightness setting state, the input terminal il2 of the dimmer 1 is connected to one input terminal of the controller 13 through the brightness setting device 11, and the input terminal il2 of the dimmer 1 is also connected to the controller 13 through the brightness detector 12. Another input.
  • the output of the controller 13 is connected to the dimming switch 16, and by controlling the dimmer switch 16 to be turned off and on (i.e., turned on), a current adjustment signal, i.e., a chopping voltage, is output to the LED driving power source 2.
  • a current adjustment signal i.e., a chopping voltage
  • the brightness setting device 11 is configured to set a target brightness value of the illumination area
  • the brightness detector 12 is configured to detect the current ambient brightness and the total brightness of the current illumination area.
  • the controller 13 is configured to receive the target brightness value of the illumination area set by the brightness setting device 11 and the current ambient brightness detected by the brightness detector 12 and the total brightness of the current illumination area, and determine whether the current ambient brightness is less than the brightness setting device setting.
  • the target brightness value if less than, calculates the difference between the target brightness value and the current ambient brightness, obtains the target value of the brightness of the LED itself, and obtains the driving current of the LED according to the correspondence between the brightness of the LED and its driving current. Target value.
  • the controller 13 adjusts the current adjustment signal outputted by the controller 13 to the LED driving power source 2 through the dimmer switch 16 according to the LED driving current target value obtained as described above, the chopping phase angle of the current adjustment signal and the driving current output by the LED driving power source 2. Corresponding relationship exists. After receiving the current adjustment signal, the LED driving power source 2 obtains a corresponding driving current target value according to the chopping phase angle, and then adjusts the output driving current to the driving current target value. It should be noted that when the controller 13 calculates that the total brightness of the current illumination area detected by the brightness detector 12 is equal to the target brightness value of the illumination area preset by the brightness setting device 11, the output current will not be changed.
  • the chopping phase angle of the signal is adjusted such that the LED driving power supply 2 does not change the current output driving current to maintain the current brightness of the LED 3.
  • the above-described function of the controller 13 can make the total brightness of the illumination area equal to the preset target brightness value.
  • the controller 13 determines that the current ambient brightness is greater than or equal to the target brightness value preset by the brightness setting device 11, the controller 13 adjusts the chopping phase angle of the current output signal through the dimming switch 16 so that the LED
  • the driving power source 2 adjusts the output driving current to zero according to the chopping phase angle, and the LED 3 does not emit light. Since the ambient brightness has reached or exceeded the set target brightness value, from the viewpoint of power saving, it is no longer necessary to additionally increase the brightness of the illumination area by the LED, so the controller 13 causes the LED drive power source 2 to adjust the output drive current. Zero action can effectively save energy.
  • the chopping phase angle of the current adjustment signal output by the controller 13 to the LED driving power source 2 necessarily drives the LED.
  • the power source 2 increases the output driving current to increase the brightness of the LED 3, maintains the brightness of the illumination area to a constant value, and if the ambient brightness increases, the chopping phase angle of the current adjustment signal output by the controller 13 to the LED driving power source 2 It is inevitable that the LED driving power source 2 reduces the output driving current to reduce the brightness of the LED 3 itself, and maintains the brightness of the irradiation area to a constant value.
  • the dimmer 1 can output a current adjustment signal with a corresponding chopping phase angle according to the current ambient brightness to make the LED 3 itself brightness.
  • the sum of the ambient brightness i.e., the total brightness of the illuminated area
  • the controller 13 will cause the LED 3 to not emit light, thereby achieving the purpose of energy saving.
  • the LED dimmer 1 preferably provides a working state switch 14 between the input terminal il2 and the brightness setting device 11 and the brightness detector 12 to realize the switching of the working state, wherein
  • the working state switch 14 includes two sub-switches, hereinafter referred to as a first sub-switch 14a and a second sub-switch 14b, wherein the first sub-switch 14a is provided with one stationary contact 141a and three movable contacts, respectively referred to as first motion a contact 142a, a second movable contact 143a and a third movable contact 144a; the second sub-switch 14b is provided with a static contact 141b and two movable contacts, respectively a first movable contact 142b and a second movable contact 143b
  • the third movable contact 144a of the first sub-switch is connected to the first end of the dimmer switch 16, and the second end of the dimming switch 16 is adjusted.
  • the output end ol3 of the optical device is connected, and the controller 13 is connected to the third end of the dimming switch 16.
  • the first moving contact 142a of the first sub-switch 14a of the working state switch is connected to the static contact 141b of the second sub-switch, and the first moving contact of the third moving contact 144a of the first sub-switch and the second sub-switch Point 142b is connected.
  • the second movable contact 143a of the first sub-switch and the second movable contact 143b of the second sub-switch are suspended.
  • the dimmer 1 when the first sub-switch 14a of the working state switch 14 contacts the first movable contact 142a and the second sub-switch 14b contacts the first movable contact 142b, the dimmer 1 operates in the brightness setting state, the dimmer The brightness setting means 11, the brightness detector 12 and the controller 13 of 1 operate in accordance with the functions mentioned above, and automatically adjust the brightness of the LED according to the ambient brightness.
  • the brightness setting means 11, the brightness detector 12 and the controller 13 are formed.
  • One way is disconnected from the input terminal il2, so that the brightness setting device 11, the brightness detector 12 and the controller 13 are not operated, and both ends of the LED driving power source 2 are electrically connected with the alternating current power source 2, and the output is not changed to the LED 3
  • the drive current causes LED 3 to operate in a state where the maximum drive current is not adjustable.
  • the LED driving power source 2 When the first sub-switch 14a of the operating state switch 14 contacts the second movable contact 143a, the brightness setting means 11, the brightness detector 12 and the controller 13, and one end of the LED driving power source 2 are disconnected from the alternating current power source. At this time, the LED driving power source 2 does not output the driving current to the outside, and the LED 3 is turned off.
  • the controller 13 in the dimmer 1 either has its own power source (such as a battery, etc.) or draws power from the middle of the LED driving power source, but the latter has a small power supply voltage, so that the controller is more convenient. 13 can obtain the power signal, as shown in FIG. 5, the dimmer in this embodiment is different from the dimmer in the fourth embodiment only in: adding one end to the controller 13, and adding the one end to the AC power source One end of the input terminal il2 of the dimmer to which the dimmer is not connected is connected. In practice, one end of the input terminal il2 of the unconnected dimmer 1 of the AC power source 4 can be a zero line end, and the input end of the dimmer 1 is connected. One end of il2 can be the live end. Thus, when the dimmer 1 is operating in the brightness setting state, the controller 1 can directly obtain power through the AC power source 4.
  • the current adjustment signal output by the dimmer provided by each of the above embodiments will also be output to the outside.
  • the LED driving power source causes the LED driving power source to change the driving current output to the LED.
  • the LED driving power source can also be packaged in the dimmer, and the dimmer is provided with two input terminals and two output terminals. When in use, the two input terminals are respectively connected to the two ends of the current power supply, and the two input terminals are respectively connected at the two ends of the LED.
  • the LED dimmer can directly change the brightness of the LED, and is convenient to install and use. The following is a description of the variant obtained by the dimmer in the first embodiment.
  • FIG. 6 shows the dimmer. As shown in FIG.
  • the dimmer 1 is different from the embodiment in that it further includes
  • the function of the LED driving power source 18 is the same as that of the LED driving power source 2 in the first embodiment and the connection relationship with other devices in the dimmer, and details are not described herein. Only the external interface settings of the dimmer are described in detail here.
  • the dimmer is provided with two input interfaces ill and il3, the input interface ill is connected to the working state switch 14, and the input port il3 is directly connected to one input of the LED driving power supply 2.
  • the dimmer is also provided with two output ports ol4 and ol5, and two output ports ol4 and 015 are respectively connected at both ends of the LED.
  • controller 13 may add one end and connect the increased end to the dimmer input il2.

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Abstract

一种LED调光器，包括亮度设定装置、亮度检测器和控制器，亮度设定装置和亮度检测器的输出端与控制器的输入端相连，在LED调光器处于亮度设定状态时，亮度设定装置和亮度检测器的公共输入端与调光器的输入端实现电连接；亮度检测器用于检测当前环境亮度值，控制器用于接收照射区域的目标亮度值和当前环境亮度值，当当前环境亮度值小于照射区域的目标亮度值时，计算照射区域的目标亮度值与当前环境亮度之间的差值，得到LED自身亮度的目标值，根据LED的自身亮度与其驱动电流之间的对应关系，得到LED的驱动电流目标值，并向LED驱动电源输出反映LED的驱动电流目标值的电流调整信号。

Description

一种 LED调光器
本申请要求于 2010年 6月 2日提交中国专利局、申请号为 201010192191.8、 发明名称为"一种 LED调光器"的中国专利申请的优先权， 其全部内容通过引 用结合在本申请中。
技术领域
本发明属于 LED控制领域， 尤其涉及一种 LED调光器。
背景技术
LED属于半导体光电组件， LED因其制造工艺流程较筒单， 制造成本较 低在照明领域得到了广泛的应用。 LED 具有高光效能， 工作安全可靠， 其采 用电场发光， 具有寿命长、 辐射低和功耗低的特点。
在照明领域， 尤其是室内照明领域， 为了使得 LED照射区域的总亮度达 到一定值， 通常需要调整作为照明光源的 LED的自身亮度， 所谓 LED照射区 域的总亮度是环境亮度和 LED的自身亮度之和， 所谓环境亮度等于去除 LED 的自身亮度后的照射区域的亮度， LED的自身亮度是指 LED发出的光照射到 照射区域后， 对该区域产生的亮度变化量。 由于 LED的驱动方式通常采用恒 流的方式，所以调整 LED的亮度通常通过调节 LED的驱动器的输出电流实现。 目前， 对于 LED的亮度调节都是采用手动调节， 例如， 通过手工调整设置在 照明设备上的手动调节装置，改变设置在照明设备中的调光器的输出电压信号 的斩波角， 以使 LED的驱动器根据调光器输出电压信号的斩波角的变化， 控 制向 LED输出的电流的变化， 从而实现人工调节 LED的亮度的目的。 由于现 有技术中， 为了使得照明区域的亮度达到一定值需要人工调节 LED亮度， 调 节过程麻烦。
发明内容
有鉴于此， 本发明的目的在于提供一种 LED调光器， 利用该调光器可以 较方便地实现 LED的亮度调节。
为实现上述目的， 本发明的一个实施例提供一种 LED调光器， 包括： 包 括亮度设定装置、 亮度检测器和控制器， 所述亮度设定装置和亮度检测器的输 出端与控制器的输入端相连， 在 LED调光器处于亮度设定状态时， 所述亮度 设定装置和亮度检测器的公共输入端与所述调光器的输入端实现电连接；所述 亮度设定装置用于预先设定照射区域的目标亮度值；所述亮度检测器用于检测 当前环境亮度值，所述控制器用于接收所述照射区域的目标亮度值和当前环境 亮度值， 当当前环境亮度值小于照射区域的目标亮度值时，计算所述照射区域 的目标亮度值与当前环境亮度之间的差值， 得到 LED 自身亮度的目标值， 根 据 LED的自身亮度与其驱动电流之间的对应关系，得到 LED的驱动电流目标 值， 并向 LED驱动电源输出反映 LED的驱动电流目标值的电流调整信号， 以 使 LED驱动电源向 LED输出的驱动电流与所述 LED驱动电流的目标值相等。
优选地，所述控制器向 LED驱动电源输出的反映 LED的驱动电流目标值 的电流调整信号具体为： 包含 LED驱动电流目标值的信息的电流调整信号。
优选地， 所述 LED调光器还包括一工作状态开关， 所述工作状态开关包 括第一子开关和第二子开关，所述第一子开关的静触点与所述调光器的输入端 连接， 所述第一子开关的第一动触点与第二子开关的静触点连接， 第二子开关 的第一动触点与第一子开关的第三动触点连接，第一子开关的第二动触点和第 二子开关的第二动触点悬空；
第二子开关的静触点还与所述亮度设定装置和亮度检测器的公共端相连， 所述第一子开关的第三动触点与 LED驱动电源的一个电源输入端相连；
当第一子开关接触其第一动触点、 并且第二子开关接触其第一动触点时， 所述调光器处于亮度设定状态。
优选地， 所述 LED调光器还包括工作状态开关和手动调节装置， 所述工 作状态开关包括第一子开关和第二子开关，所述第一子开关的静触点与所述调 光器的输入端连接， 所述第一子开关的第一动触点与第二子开关的静触点连 接， 第二子开关的第一动触点与第一子开关的第三动触点连接， 第一子开关的 第二动触点和第二子开关的第二动触点悬空；
所述第二子开关的静触点还与所述亮度设定装置和亮度检测器的公共端 相连， 所述第一子开关的第三动触点通过所述手动调节装置与 LED驱动电源 的一个电源输入端相连，所述手动调节装置还向所述控制器输出手动亮度调节 信号；
当第一子开关接触其第一动触点、 并且第二子开关接触其第一动触点时， 所述调光器处于亮度设定状态； 当第一子开关接触第三动触点、 并且第二子开关接触第二动触点时， 所述 调光器处于手动设定状态，此时所述手动调节装置向控制器输出手动亮度调节 信号， 使得控制器根据手动亮度调节信号输出电流调节信号。
优选地， 所述 LED调光器还包括一调光开关， 所述控制器通过所述调光 开关向所述 LED驱动电源的输入端输出电流调整信号， 并通过所述调光开关 改变所述电流调整信号的斩波相角； 所述控制器向 LED驱动电源输出的反映 LED的驱动电流目标值的电流调整信号具体为： 具有与所述 LED的驱动电流 目标值对应的斩波相角的电流调整信号。
优选地， 所述 LED调光器还包括一工作状态开关， 所述工作状态开关包 括第一子开关和第二子开关，所述第一子开关的静触点与所述调光器的输入端 连接， 所述第一子开关的第一动触点与第二子开关的静触点连接， 第二子开关 的第一动触点与第一子开关的第三动触点连接，第一子开关的第二动触点和第 二子开关的第二动触点悬空；
第二子开关的静触点还与所述亮度设定装置和亮度检测器的公共端相连， 所述第一子开关的第三动触点与 LED驱动电源的一个电源输入端相连；
第一子开关的第三动触点与所述调光开关的第一端连接，调光开关的第二 端与 LED驱动电源的一个电源输入端相连；
所述控制器与所述调光开关的第三端连接；
当第一子开关接触其第一动触点、 并且第二子开关接触其第一动触点时， 所述调光器处于亮度设定状态。
优选地，所述控制器还用于当当前环境亮度大于或等于亮度设定装置设定 的目标亮度值时， 输出反映 LED驱动电流目标值为零的电流调整信号。
优选地， 所述 LED驱动电源设置在所述 LED调光器中。
根据本发明实施例， 能够实现自动调节 LED的自身亮度， 使得照射区域 的亮度等于或高于预设的亮度值。
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筒单地介绍，显而易见地， 下面描述 中的附图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是本发明提供的 LED调光器的一个实施例的示意图；
图 2是本发明提供的 LED调光器的另一个实施例的示意图；
图 3是本发明提供的 LED调光器的另一个实施例的示意图；
图 4是本发明提供的 LED调光器的另一个实施例的示意图；
图 5是本发明提供的 LED调光器的另一个实施例的示意图；
图 6是本发明提供的 LED调光器的另一个实施例的示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚， 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。 实施例一
图 1示出了本实施例提供的调光器应用场景。 如图 1所示， LED 3通过 LED驱动电源 2驱动， LED驱动电源 2向 LED 3输出恒定电流， 即 LED驱动 电源 2对 LED 3的亮度控制是通过改变 LED驱动电源 2的输出电流的幅值实 现的。 本实施例中提供的调光器 1接在交流电源 4和 LED驱动电源 2之间， 具体地， 调光器 1具有输入端 ill和第一输出端 oil和第二输出端 ol2; 交流 电源 4的一端连接调光器 1的输入端 ill ,另一端连接 LED驱动电源 2的第二 输入端 i22。 调光器 1包括亮度设定装置 11、 亮度检测器 12和控制器 13。 在 处于亮度设定状态时， 调光器 1的输入端 ill通过亮度设定装置 11连接控制 器 13的一个输入端， 同时调光器的输入端 ill还通过亮度检测器 12连接控制 器 13的另一个输入端。 控制器 13的输出端连接 LED驱动电源的第三输入端 i23。
其中， 亮度设定装置 11用于设定照射区域的目标亮度值 L。， 亮度检测器 12用于检测当前环境亮度。 控制器 13用于接收亮度设定装置 11设定的照射 区域的目标亮度值和亮度检测器 12检测的当前环境亮度 Lc, 判断当前环境亮 度 Lc是否小于亮度设定装置 11设定的目标亮度值 L。， 如果小于， 则计算目标 亮度值与当前环境亮度之间的差值， 得到 LED自身亮度的目标值， 根据 LED 的自身亮度与其驱动电流之间的对应关系， 得到 LED的驱动电流目标值； 所 述控制器 13通过输出端 ol2向 LED驱动电源 2的第三输入端 i23输入电流调 整信号， 所述电流调整信号中包含 LED驱动电流目标值的信息， LED驱动电 源 2根据从调光器 1的控制器 13中接收到的电流调整信号， 改变输出值 LED 3的驱动电流， 并且改变后的驱动电流等于接收到的电流调整信号中包含的驱 动电流目标值， 需要说明的是， 当控制器 13判断出亮度检测器 12检测的当前 照射区域的总亮度等于亮度设定装置 11 预先设定的照射区域的目标亮度值 时， 将不输出任何信号， 使得 LED驱动电源 2不改变当前的输出驱动电流， 以维持当前 LED 3的亮度。 总之， 通过控制器 13的上述功能可以使得照射区 域的总亮度与预先设定的目标亮度值相等。 另外如果控制器 13判断出当前环 境亮度大于或等于亮度设定装置 11预先设定的目标亮度值，则控制器 13输出 的电流调整信号中所包含的 LED驱动电流目标值为零， 使得 LED驱动电源 2 在接收到电流调整信号后， 将输出的驱动电流调为零， 使得 LED 3不发光， 由于在环境亮度已经达到或高于预先设定的目标亮度值， 则从节电的角度看， 不再需要另外通过 LED增加照射区域的亮度，因此控制器 13将输出电流调整 为零的动作可以有效节省电能。
综上可以看出，在环境亮度低于预先设定的目标亮度值的情况下，如果环 境亮度降低，则控制器 13输出的电流调整信号中所包含的目标电流值将增大， 使得 LED驱动电源 2增大输出的驱动电流以提高 LED 3的自身亮度； 如果环 境亮度升高， 则控制器输出的电流调整信号中所包含的目标亮度值将减小，使 得 LED驱动电源 2减小输出的驱动电流以降低 LED 3的自身亮度， 总之， 当 通过亮度设定装置 11预先设定了一个目标亮度值后， 该调光器 1随时可以根 据当前的环境亮度输出电流调整信号， 以使得 LED 3 自身亮度与环境亮度的 和总是维持在目标亮度值上。 另外，在环境亮度高于或等于预先设定的目标亮 度值的情况下， 控制器 13将促使 LED 3不发光， 达到节能的目的。
需要说明的是， 在实际中， 不是总需要依照环境亮度对 LED的自身亮度 进行调节的， 有时 LED需要在调节后的亮度工作一段时间， 为了实现上述目 的， 本实施例中提供的 LED调光器 1优选地在输入端 ill与亮度设定装置 11 和亮度检测器 12之间设置一工作状态开关 14, 该工作状态开关 14包括两个 子开关， 以下称为第一子开关 14a和第二子开关 14b, 其中第一子开关 14a设 置一个静触点 141a和三个动触点， 以下分别称为第一动触点 142a、 第二动触 点 143a和第三动触点 144a; 第二子开关 14b设置一个静触点 141b和两个动 触点， 分别为第一动触点 142b和第二动触点 143b。 其中， 第一子开关 14a的 静触点 141a与调光器的输入端 ill连接， 第一子开关 14a的第一动触点 142a 与第二子开关 14b的静触点 141b连接， 第二子开关 14b的第一动触点 142b 与第一子开关 14a的第三动触点 144a相连， 另外， 第二子开关 14b的静触点 141b还与亮度设定装置 11和亮度检测器 12朝向调光器输入端 ill一侧的公共 端连接， 第一子开关的第二动触点 143a悬空， 第二子开关的第二动触点 143b 也悬空。 当第一子开关 14a接触第一动触点 142a、 并且第二子开关 14b接触 第一动触点 142b时，调光器 1工作在亮度设定状态， 亮度设定装置 11和亮度 检测器 12以及 LED驱动电源都能够实现与调光器中的输入端 ill的电连接， 从而为这些装置供电。 并且调光器 1中的亮度设定装置 11、 亮度检测器 12和 控制器 13按照上文提到的功能进行工作，实现根据环境亮度对 LED的自身亮 度进行自动调节。
当第一子开关 14a接触第二动触点 143a时， 则 LED驱动电源 2、 调光器 中的亮度设定装置 11、 亮度检测器 12和控制器 13均与输入端 ill断开， 无法 得到电力供应， 所以此时 LED 3熄灭。
而当第一子开关 14a接触第三动触点 144a、 并且第二子开关 14b接触第 二动触点 143b时， 调光器中的亮度检测器 12和控制器 13均与输入端 ill断 开， 而 LED驱动电源 4与输入端 il 1之间实现电连接， 由于 LED驱动电源 4 接收不到控制器 13输出的电流调整信号，因此 LED驱动电源 4输出恒定的驱 动电流至 LED , 所以此时 LED 3工作在最大亮度状态。
实施例二
在图 1中， 调光器 1中的控制器 13要么自带电源（例如电池等）， 要么从 LED 驱动电源中间取得电源， 但后者的电源电压较小， 为了更方便地使得控 制器 13能够取得电源信号， 图 2示出了本发明提供的调光器的另一实施例， 如图 2所示， 本实施例中的调光器 1与图 1中的调光器的区别仅在于： 在控制 器 13增加一端、并就该增加的一端与交流电源 4中未连接调光器的输入端 ill 的一端连接。 这样， 当调光器 1工作在亮度设定状态时， 控制器 13可以通过 交流电源 4直接获得电源， 但需要说明的是， 虽然控制器 13的一端直接连接 到交流电源 4的一端， 但是当第一子开关 14a接触第二动触点 143a时， 由于 控制器 13与交流电源 4之间无法形成电流回路， 控制器 13也仍然不能工作。
实施例三
图 1和图 2中所示的调光器 1中的工作状态开关 14中的第一子开关 14a 接触第三动触点 144a、 并且第二子开关 14b接触第二动触点 143b时， LED 驱动电源 2工作在不可调节的输出最大驱动电流的状态，而实际中也可以引入 手动调节 LED 自身亮度的方案， 图 3示出了本发明提供的调光器的另一实施 例，如图 3所示， 该调光器 1与图 1中的调光器的区别仅在于在工作状态开关 14的第一子开关 14a的第三动触点 144a与调光器的输出端 oil之间串联接入 一手动调节装置 15 , 而第二子开关 14b的第一动触点 142b连接手动调节装置 15朝向 LED驱动电源 2的一端， 即与调光器输出端 oil连接。
当第一子开关 14a接触第三动触点 144a、 并且第二子开关 14b接触第二 动触点 143b时， 该手动调节装置 15还向控制器 13输出手动亮度调节信号， 使用者通过调节手动调节装置 15可以控制控制器 13输出的电流调节信号的变 化， 从而改变 LED驱动电源 2的输出驱动电流发生变化， 改变 LED3的自身 亮度。 可见， 图 3中的调光器不仅可以工作在自动调节 LED亮度的状态， 而 且在另一工作状态也可以通过手动调节的方式实现 LED亮度调节的功能。 当 然， 图 3中的调光器也可以在控制器 13增加一端、 并就该增加的一端与交流 电源 4中未连接调光器的输入端 ill的一端连接， 使得控制器 13可以通过交 流电源 4直接获得电源。
实施例四
图 4示出了本实施例提供另一种调光器的应用场景，本实施例中调光器与 上述几个实施例的区别在于，在调光器中控制器输出的电流调整信号的形式不 同，在以上几个实施例中，从控制器输出的电流调整信号中直接包含目标电流 值信息，而本实施例中的控制器是通过控制调光开关改变电流调整信号的斩波 相角， 向 LED驱动电源传递目标电流值信息的。 因此， 与其他实施例不同的 是： 本实施例中的电流调整信号， 为调光开关向 LED驱动电源输出的斩波电 压， 所述电流调整信号中所包含的目标电流值的不同，在本实施例中具体的体 现为斩波电压相角的不同。 如图 4所示， 在本实施例中， LED 3通过 LED驱 动电源 2驱动， LED驱动电源 2向 LED 3输出恒定电流， 即 LED驱动电源 2 对 LED 3的亮度控制是通过改变 LED驱动电源 2的输出电流的幅值实现的。 本实施例中提供的调光器 1接在交流电源 4和 LED驱动电源 2之间。具体地， 调光器 1具有输入端 il2和输出端 013。 交流电源 4的一端连接调光器 1的输 入端 il2, 另一端连接 LED驱动电源 2第二输入端 i25。
调光器 1 包括亮度设定装置 11、 亮度检测器 12、 控制器 13和调光开关
16。 在处于亮度设定状态时， 调光器 1的输入端 il2通过亮度设定装置 11连 接控制器 13的一个输入端， 同时调光器 1的输入端 il2还通过亮度检测器 12 连接控制器 13的另一个输入端。 控制器 13的输出端与调光开关 16相连接， 通过控制调光开关 16关断和闭合（即接通）， 向 LED驱动电源 2输出电流调 整信号， 即斩波电压。 在亮度设定状态时， 调光开关 16的两端分别与亮度设 定装置 11和亮度检测器 12的公共端以及调光器的输出端 ol3连接。
其中， 亮度设定装置 11用于设定照射区域的目标亮度值， 亮度检测器 12 用于检测当前环境亮度和当前照射区域的总亮度。 控制器 13用于接收亮度设 定装置 11设定的照射区域的目标亮度值和亮度检测器 12检测的当前环境亮度 和当前照射区域的总亮度，判断当前环境亮度是否小于亮度设定装置设定的目 标亮度值， 如果小于， 则计算目标亮度值与当前环境亮度之间的差值， 得到 LED自身亮度的目标值，根据 LED的自身亮度与其驱动电流之间的对应关系， 得到 LED的驱动电流目标值。 控制器 13根据上述得到的 LED驱动电流目标 值，通过调光开关 16调整控制器 13向 LED驱动电源 2输出的电流调整信号， 电流调整信号的斩波相角与 LED驱动电源 2输出的驱动电流之间存在对应关 系， LED驱动电源 2接收到电流调整信号后， 根据所述斩波相角得到对应的 驱动电流目标值， 然后将输出的驱动电流调整为上述驱动电流目标值。 需要说 明的是，当控制器 13计算出亮度检测器 12检测的当前照射区域的总亮度等于 亮度设定装置 11预先设定的照射区域的目标亮度值时， 将不改变输出的电流 调整信号的斩波相角， 使得 LED 驱动电源 2不改变当前的输出驱动电流， 以 维持 LED 3的当前亮度。 总之， 通过控制器 13的上述功能可以使得照射区域 的总亮度与预先设定的目标亮度值相等。
另外，如果控制器 13判断出当前环境亮度大于或等于亮度设定装置 11预 先设定的目标亮度值，则控制器 13将通过调光开关 16输出的电流调整信号的 斩波相角， 使得 LED驱动电源 2根据该斩波相角将输出的驱动电流调为零， LED 3不发光。 由于环境亮度已经达到或高于设定的目标亮度值， 所以从节电 的角度看， 不再需要另外通过 LED增加照射区域的亮度， 因此控制器 13促使 LED驱动电源 2将输出的驱动电流调为零的动作可以有效地节省电能。
综上可以看出，在环境亮度低于预先设定的目标亮度值的情况下，如果环 境亮度降低，则控制器 13向 LED驱动电源 2输出的电流调整信号的斩波相角 必然使 LED驱动电源 2增加输出的驱动电流， 以提高 LED 3的自身亮度， 维 持照射区域的亮度为恒定值， 如果环境亮度升高， 则控制器 13向 LED驱动电 源 2输出的电流调整信号的斩波相角必然使 LED驱动电源 2减小输出的驱动 电流， 以减小 LED 3的自身亮度， 维持照射区域的亮度为恒定值。 总之， 当 通过亮度设定装置 11预先设定了一个目标亮度值后， 该调光器 1随时可以根 据当前的环境亮度输出带有相应斩波相角的电流调整信号， 以使 LED 3 自身 亮度与环境亮度的总和（即照射区域的总亮度） 维持在目标亮度值上。 另夕卜， 当环境亮度高于或等于预先设定的目标亮度值的情况下， 控制器 13 将促使 LED 3不发光， 达到节能的目的。
需要说明是， 在实际中， LED 不需要随时工作在亮度自动调节的状态， 有时 LED需要在调节后的亮度工作一段时间。 为实现上述目的， 本实施例中 提供的 LED调光器 1优选地在输入端 il2与亮度设定装置 11和亮度检测器 12 之间设置一工作状态开关 14, 以实现工作状态的切换， 其中工作状态开关 14 包括两个子开关， 以下称为第一子开关 14a和第二子开关 14b, 其中第一子开 关 14a设置一个静触点 141a和三个动触点， 以下分别称为第一动触点 142a、 第二动触点 143a和第三动触点 144a; 第二子开关 14b设置一个静触点 141b 和两个动触点， 分别为第一动触点 142b和第二动触点 143b。 其中第一子开关 的第三动触点 144a与调光开关 16的第一端连接， 调光开关 16的第二端与调 光器的输出端 ol3相连，控制器 13与调光开关 16的第三端相连。 工作状态开 关中的第一子开关 14a的第一动触点 142a与第二子开关的静触点 141b相连， 第一子开关的第三动触点 144a与第二子开关的第一动触点 142b相连。第一子 开关的第二动触点 143a和第二子开关的第二动触点 143b悬空。
这样， 当工作状态开关 14的第一子开关 14a接触第一动触点 142a、 并且 第二子开关 14b接触第一动触点 142b时， 调光器 1工作在亮度设定状态， 调 光器 1中的亮度设定装置 11、 亮度检测器 12和控制器 13按照上文提到的功 能进行工作， 实现根据环境亮度对 LED的自身亮度进行自动调节。
当工作状态开关 14的第一子开关 14a接触第三动触点 144a、 并且第二子 开关 14b接触第二动触点 143b时， 亮度设定装置 11、 亮度检测器 12和控制 器 13形成的一路与输入端 il2断开， 使得亮度设定装置 11、 亮度检测器 12 和控制器 13不工作， 而 LED驱动电源 2的两端与交流电源 2建立电连接， 并 且不改变改变输出至 LED 3的驱动电流， 使得 LED 3工作在不可调节的输出 最大驱动电流的状态。
当工作状态开关 14的第一子开关 14a接触到第二动触点 143a时，亮度设 定装置 11、 亮度检测器 12和控制器 13、 以及 LED驱动电源 2的一端都与交 流电源断开， 此时 LED驱动电源 2不向外输出驱动电流， LED 3熄灭。
实施例五
在图 4中， 调光器 1中的控制器 13要么自带电源内 （例如电池等）， 要么 从 LED驱动电源中间取得电源， 但后者的电源电压较小， 为了更方便地使得 控制器 13能够取得电源信号， 如图 5所示， 本实施例中的调光器与实施例四 中的调光器的区别仅在于： 在控制器 13增加一端， 并就该增加的一端与交流 电源 4中未连接调光器的输入端 il2的一端连接， 在实际中， 交流电源 4的未 连接调光器 1的输入端 il2的一端可以为零线端，而连接调光器 1的输入端 il2 的一端可以为火线端。 这样， 当调光器 1 工作在亮度设定状态时， 控制器 1 可以通过交流电源 4直接获得电源。 实施例六
上述各个实施例提供的调光器输出的电流调整信号还将输出至外部的 LED驱动电源， 以使 LED驱动电源改变输出至 LED的驱动电流， 在实际中， 也可以将 LED驱动电源封装在调光器中， 并将调光器设置两个输入端和两个 输出端， 使用时， 将两个输入端分别接在电流电源的两端， 两个输入端分别接 在 LED的两端， LED调光器可以直接改变 LED的亮度，安装和使用均很方便。 以下以实施例一中的调光器进行变形得到的方案来进行说明，图 6示出了该调 光器， 如图 6所示， 该调光器 1与实施例中的区别在于， 还包括内置的 LED 驱动电源 18, 该 LED驱动电源 18的作用与实施例一中的 LED驱动电源 2的 作用以及和调光器中的其他器件的连接关系都是相同， 这里不再赘述。此处仅 详细说明调光器的外部接口设置， 调光器设置两个输入接口 ill和 il3 , 输入 接口 ill与工作状态开关 14连接， 输入端口 il3直接连接 LED驱动电源 2的 一个输入端。 而调光器还设置两个输出端口 ol4和 ol5 , 两个输出端口 ol4和 015分别接在 LED的两端。 另外， 控制器 13也可以增加一个端， 并就该增加 的一端与调光器的输入端 il2连接。 以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通 技术人员来说， 在不脱离本发明原理的前提下， 还可以做出若干改进和润饰， 这些改进和润饰也应视为本发明的保护范围。

Claims

权 利 要 求
1、 一种 LED调光器， 其特征在于， 包括亮度设定装置、 亮度检测器和控 制器， 所述亮度设定装置和亮度检测器的输出端与控制器的输入端相连， 在 LED调光器处于亮度设定状态时， 所述亮度设定装置和亮度检测器的公共输 入端与所述调光器的输入端实现电连接；所述亮度设定装置用于预先设定照射 区域的目标亮度值； 所述亮度检测器用于检测当前环境亮度值， 所述控制器用 于接收所述照射区域的目标亮度值和当前环境亮度值，当当前环境亮度值小于 照射区域的目标亮度值时，计算所述照射区域的目标亮度值与当前环境亮度之 间的差值， 得到 LED自身亮度的目标值， 根据 LED的自身亮度与其驱动电流 之间的对应关系， 得到 LED的驱动电流目标值， 并向 LED驱动电源输出反映 LED的驱动电流目标值的电流调整信号，以使 LED驱动电源向 LED输出的驱 动电流与所述 LED驱动电流的目标值相等。
2、 根据权利要求 1所述的调光器， 其特征在于， 所述控制器向 LED驱动 电源输出的反映 LED的驱动电流目标值的电流调整信号具体为：含 LED驱动 电流目标值的信息的电流调整信号。
3、 根据权利要求 2所述的调光器， 其特征在于， 所述 LED调光器还包括 一工作状态开关， 所述工作状态开关包括第一子开关和第二子开关， 所述第一 子开关的静触点与所述调光器的输入端连接，所述第一子开关的第一动触点与 第二子开关的静触点连接，第二子开关的第一动触点与第一子开关的第三动触 点连接， 第一子开关的第二动触点和第二子开关的第二动触点悬空；
第二子开关的静触点还与所述亮度设定装置和亮度检测器的公共端相连， 所述第一子开关的第三动触点与 LED驱动电源的一个电源输入端相连；
当第一子开关接触其第一动触点、 并且第二子开关接触其第一动触点时， 所述调光器处于亮度设定状态。
4、 根据权利要求 1所述的调光器， 其特征在于， 所述 LED调光器还包括 工作状态开关和手动调节装置，所述工作状态开关包括第一子开关和第二子开 关， 所述第一子开关的静触点与所述调光器的输入端连接， 所述第一子开关的 第一动触点与第二子开关的静触点连接，第二子开关的第一动触点与第一子开 关的第三动触点连接，第一子开关的第二动触点和第二子开关的第二动触点悬 空；
所述第二子开关的静触点还与所述亮度设定装置和亮度检测器的公共端 相连， 所述第一子开关的第三动触点通过所述手动调节装置与 LED驱动电源 的一个电源输入端相连，所述手动调节装置还向所述控制器输出手动亮度调节 信号；
当第一子开关接触其第一动触点、 并且第二子开关接触其第一动触点时， 所述调光器处于亮度设定状态；
当第一子开关接触第三动触点、 并且第二子开关接触第二动触点时， 所述 调光器处于手动设定状态，此时所述手动调节装置向控制器输出手动亮度调节 信号， 使得控制器根据手动亮度调节信号输出电流调节信号。
5、 根据权利要求 1所述的调光器， 其特征在于， 所述 LED调光器还包括 一调光开关， 所述控制器通过所述调光开关向所述 LED驱动电源的输入端输 出电流调整信号， 并通过所述调光开关改变所述电流调整信号的斩波相角； 所 述控制器向 LED驱动电源输出的反映 LED的驱动电流目标值的电流调整信号 具体为：具有与所述 LED的驱动电流目标值对应的斩波相角的电流调整信号。
6、 根据权利要求 5所述的调光器， 其特征在于， 所述 LED调光器还包括 一工作状态开关， 所述工作状态开关包括第一子开关和第二子开关， 所述第一 子开关的静触点与所述调光器的输入端连接，所述第一子开关的第一动触点与 第二子开关的静触点连接，第二子开关的第一动触点与第一子开关的第三动触 点连接， 第一子开关的第二动触点和第二子开关的第二动触点悬空；
第二子开关的静触点还与所述亮度设定装置和亮度检测器的公共端相连， 所述第一子开关的第三动触点与 LED驱动电源的一个电源输入端相连；
第一子开关的第三动触点与所述调光开关的第一端连接，调光开关的第二 端与 LED驱动电源的一个电源输入端相连；
所述控制器与所述调光开关的第三端连接；
当第一子开关接触其第一动触点、 并且第二子开关接触其第一动触点时， 所述调光器处于亮度设定状态。
7、 根据权利要求 1至 6中任意一项所述的调光器， 其特征在于， 所述控 制器还用于当当前环境亮度大于或等于亮度设定装置设定的目标亮度值时，输 出反映 LED驱动电流目标值为零的电流调整信号。
8、根据权利要求 1至 6中任意一项所述的调光器，其特征在于，所述 LED 驱动电源设置在所述 LED调光器中。
9、 根据权利要求 1至 8中任意一项所述的调光器， 其特征在于， 所述控 制器还包括一个输入端，并与交流电源中未连接调光器的工作状态开关的一端 连接。
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