TW201931949A - Dimmer interface having reduced power consumption - Google Patents

Dimmer interface having reduced power consumption Download PDF

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Publication number
TW201931949A
TW201931949A TW107146264A TW107146264A TW201931949A TW 201931949 A TW201931949 A TW 201931949A TW 107146264 A TW107146264 A TW 107146264A TW 107146264 A TW107146264 A TW 107146264A TW 201931949 A TW201931949 A TW 201931949A
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TW
Taiwan
Prior art keywords
dimmer switch
transformer
alternating current
signal
winding
Prior art date
Application number
TW107146264A
Other languages
Chinese (zh)
Inventor
宋志華
Original Assignee
美商亮銳公司
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Filing date
Publication date
Priority to US15/849,176 priority Critical patent/US10462863B2/en
Priority to US15/849,176 priority
Priority to EP18155273 priority
Priority to ??18155273.8 priority
Application filed by 美商亮銳公司 filed Critical 美商亮銳公司
Publication of TW201931949A publication Critical patent/TW201931949A/en

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B45/00Circuit arrangements for operating light emitting diodes [LED]
    • H05B45/10Controlling the intensity of the light
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • H05B33/08Circuit arrangements for operating electroluminescent light sources
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B45/00Circuit arrangements for operating light emitting diodes [LED]
    • H05B45/30Driver circuits
    • H05B45/37Converter circuits

Abstract

The disclosed subject matter includes a device including a dimmer switch interface. The switch interface includes a transformer having a first winding magnetically coupled to a second winding, and the first winding is electrically coupled to a pair of terminals. The switch interface also includes a current source configured to supply an intermittent alternating current to the second winding, the intermittent alternating current having a periodic waveform, each period of the waveform including during which the current is fixed at a predetermined fixed low A first part of the value and a second part during which the current alternates between a high value and a low value.

Description

Dimmer interface with reduced power consumption

Light-emitting diodes ("LEDs") are commonly used as light sources in various applications. For example, LEDs are more energy efficient than traditional light sources and provide much higher energy conversion efficiency than incandescent and fluorescent lamps. In addition, compared to traditional light sources, LEDs radiate less heat into the lighting area and provide greater control over brightness, emission color, and spectrum. These characteristics make LEDs an excellent choice for a variety of lighting applications ranging from indoor lighting to automotive lighting. Therefore, there is a need for improved LED-based lighting systems that take advantage of LEDs to provide high-quality lighting.

The present invention addresses this need. According to an aspect of the present invention, a lighting system is disclosed, which includes: a lamp including a driver coupled to a light source; a dimmer switch; and a dimmer switch interface including: (i) a transformer Having a first winding magnetically coupled to a second winding, the first winding being electrically coupled to the dimmer switch, and the second winding being electrically coupled to the driver of the luminaire; and (ii) a current source It is configured to supply the transformer with an intermittent alternating current when the current source is energized.

Examples of different light illumination systems and / or light emitting diode ("LED") implementations will be described more fully below with reference to the accompanying drawings. These examples are not mutually exclusive, and features found in one example can be combined with features found in one or more other examples to achieve additional implementations. Therefore, it will be understood that the examples shown in the accompanying drawings are provided for illustrative purposes only and are not intended to limit the invention in any way. Identical element symbols refer to identical elements throughout.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms may be used to distinguish one element from another. For example, without departing from the scope of the present invention, a first element may be referred to as a second element and a second element may be referred to as a first element. As used herein, the term "and / or" may include any and all combinations of one or more of the associated listed items.

It will be understood that when an element such as a layer, region, or substrate is referred to as being "on" or extending "to" another element, it can be directly on the other element or extending directly Onto the other element, or an intervening element may also be present. In contrast, when an element is referred to as being "directly on" another element or "directly on" extending to another element, there may be no intervening elements present. It will also be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element and / or connected or coupled to the other element through one or more intervening elements. One component. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements between the element and the other element. It will be understood that in addition to any orientation depicted in the figures, these terms are intended to cover different orientations of the elements.

Relative terms such as "below", "above", "above", "below", "horizontal" or "vertical" may be used herein to describe an element, layer or region as illustrated in the figure and Relationship of another element, layer or region. It will be understood that in addition to the orientation depicted in the figures, these terms are also intended to cover different orientations of the device.

In addition, whether LEDs, LED arrays, electrical components, and / or electronic components are housed on one, two, or more electronic boards can also depend on design constraints and / or applications.

Semiconductor light emitting devices (LEDs) or optical power emitting devices (such as devices emitting ultraviolet (UV) or infrared (IR) optical power) are among the most efficient light sources currently available. These devices (hereinafter "LEDs") may include light emitting diodes, resonant cavity light emitting diodes, vertical cavity laser diodes, edge emitting lasers, or the like. Due to their compact size and lower power requirements, for example, LEDs can be attractive candidates for many different applications. For example, they can be used as light sources (e.g., flashlights and camera flashes) for handheld battery-powered devices such as cameras and mobile phones. They can also be used, for example, in automotive lighting, head-up display (HUD) lighting, horticultural lighting, street lighting, flashlights for videoconferencing, general lighting (e.g. home, store, office and studio lighting, theater / stage Lighting and architectural lighting), augmented reality (AR) lighting, virtual reality (VR) lighting, backlighting for displays and IR spectroscopy. A single LED can provide less bright light than an incandescent light source, and thus multiple junction devices or LED arrays (such as single LED arrays, micro LED arrays, etc.) can be used in applications where greater brightness is desired or required.

A dimmer switch is a device used to control the brightness of light produced by a luminaire. Externally, a manually operated dimmer switch can appear as a knob, and a user can turn the knob to increase or decrease the brightness of a lamp. Internally, the dimmer switch may include a variable resistor coupled to the knob. A variable resistor can be used to adjust the value of a voltage signal provided by the dimmer switch to one of the lamps.

One of the dimming systems often used for fluorescent and LED lighting is called 0 V to 10 V dimming. According to this system, the voltage signal provided to a luminaire by a 0 V to 10 V dimmer switch varies between 0 V and 10 V. When the value of the voltage signal is below a certain threshold close to 0 V, the luminaire can operate at its lowest possible brightness or turn itself off completely. When the value of the voltage signal exceeds a certain threshold close to 10 V, the luminaire can operate at its maximum brightness.

When using a 0 V to 10 V system, the dimmer switch is usually connected to the light source via the dimmer switch interface. A dimmer switch interface is a device that can be inserted between a dimmer switch and a lamp to electrically isolate the dimmer switch and suppress noise. To achieve this function, the dimmer switch interface may include a transformer for driving the dimmer switch and connecting the dimmer switch to the luminaire.

One disadvantage of dimmer switch interfaces is that they are often inefficient. A typical dimmer switch interface may consume 100 mW or more. The loss is mainly due to the transformer in the dimmer switch interface. This loss may be undesirable because it can increase the cost of operating the dimmer switch interface. In addition, the power loss attributed to the transformer in the dimmer switch interface prevents the use of one of the lighting systems of a dimmer switch interface to comply with various current and future environmental regulations that mandate a limit on the standby power of the lighting system.

According to aspects of the present invention, a dimmer switch interface with reduced power consumption is disclosed. The dimmer switch interface may include a transformer for magnetically coupling a dimmer switch to a lamp. The transformer may be driven by a current source configured to supply the transformer with an intermittent current. When the transformer is driven with intermittent current, the current supplied to the transformer is switched between a high current value (for example, 10 mA) and a low current value (for example, 0 A). During the period in which the intermittent current is switched to a low value (for example, 0 A), the transformer is turned off without consuming any power. Therefore, when the transformer is driven with intermittent current, the power loss of the transformer can be significantly reduced.

According to an aspect of the present invention, a dimmer switch interface is disclosed, which includes: a pair of first terminals, which are used to connect the dimmer switch interface to a dimmer switch; a pair of second terminals, etc. A transformer for connecting a dimmer switch to a driver of a lamp; a transformer having a first winding magnetically coupled to a second winding, the first winding being electrically coupled to the pair of first terminals, and the second The windings are electrically coupled to the pair of second terminals; and a current source configured to power the transformer with an intermittent alternating current when the current source is energized.

According to an aspect of the present invention, a device is disclosed, which includes: a driver for a lamp; and a dimmer switch interface for connecting the driver to a dimmer switch, the dimmer switch The interface includes: (i) a transformer having a first winding magnetically coupled to a second winding, the first winding being electrically coupled to a pair of terminals for connecting the dimmer switch interface to the dimmer switch And the second winding is electrically coupled to the driver; and (ii) a current source configured to power the transformer with an intermittent alternating current when the current source is energized.

FIG. 1 is a diagram of an example of an illumination system 100 according to one aspect of the present invention. The lighting system 100 may include a dimmer switch 110, a lamp 120, and a dimmer switch interface 130 that couples the dimmer switch 110 to the lamp 120.

The dimmer switch 110 may be a 0 V to 10 V dimmer switch and / or any other suitable type of dimmer switch. The dimmer switch 110 may include a variable resistor (eg, a potentiometer) and / or any suitable type of device capable of placing a variable load between the terminals T1 of the dimmer switch interface 130. Additionally or alternatively, the dimmer switch 110 may include any suitable type of semiconductor device capable of changing the voltage between the terminals T1 of the dimmer switch interface 130. In short, according to aspects of the present invention, the dimmer switch 110 may be any suitable type of device capable of generating a voltage signal indicating a desired brightness level of one of the light output from the lamp 120.

In some embodiments, the dimmer switch 110 may include a light sensor configured to measure a level of ambient light near the lamp 120 and generate a light sensor based on the measured ambient light level. Voltage signal. Additionally or alternatively, in some embodiments, the dimmer switch 110 may include a knob or a slider that can be used to actuate a potentiometer that is part of the dimmer switch 110. Additionally or alternatively, the dimmer switch 110 may include a wireless receiver (e.g., a ZigBee gateway, a WiFi receiver, a remote control receiver, etc.) that is capable of receiving from a remote device (e.g., a remote device) A user's smart phone or remote control) receives an indication of a desired brightness level and generates a corresponding voltage signal based on the indication.

The light fixture 120 may include any suitable type of light fixture. The lamp 120 may include a driver 122 and a light source 124 powered by a signal PWR. The light source 124 may include any suitable type of light source, such as a fluorescent light source, an incandescent light source, and / or one or more light emitting diodes (LEDs). In the example of the present invention, the light source 124 includes one or more LEDs and the signal PWR is a DC or a pulse width modulation generated by the driver 122 based on a signal DIM received by the driver 122 from the dimmer switch interface 130 ( PWM) signal. The driver 122 may include a DC / DC converter circuit, a tuning engine, or the like.

The signal DIM may be a voltage signal. The level of the signal DIM determines the DC magnitude and / or duty cycle of the signal PWR. If the signal DIM has a first level (for example, 2 V), the driver 122 may assign a first DC magnitude and / or a first duty cycle to the signal PWR. In contrast, if the signal DIM has a second level (for example, 5V), the driver 122 may assign a second DC value and / or a second operation different from the first DIM level on the signal PWR. cycle. As can be easily understood, the DC magnitude and / or duty cycle of the signal PWR determines the amount of current delivered to the light source 124, which in turn can determine the brightness of the light output from the light source 124.

The dimmer switch interface 130 can provide isolation between the luminaire 120 and the dimmer switch 110 to protect people who operate the dimmer switch from electric shock. The dimmer switch interface 130 may include a converter circuit 132 that is coupled to a converter circuit 134 via a transformer 136. The transformer 136 can be driven by a continuous current signal S0 generated by a current source 138. As illustrated in FIG. 2, the signal S0 may be an alternating current (AC) signal, and it may be shaped as a continuous square wave. However, in alternative embodiments, the signal SO may be shaped as a sine wave and / or any other suitable type of wave. In some embodiments, when a current signal has a constant current level, the current signal may be continuous.

The transformer 136 may include a winding W1 and a winding W2 magnetically coupled to the winding W1. Winding W1 may be electrically coupled to luminaire 120 (eg, via converter circuit 132). The winding W2 may be electrically coupled to the dimmer switch 110 (eg, via the converter circuit 134). In some implementations, the winding W2 may be electrically coupled to the terminal T1 of the dimmer switch interface 130 (eg, via the converter circuit 134). In these examples, the dimmer switch 110 may also be coupled to the terminal T1 to complete the electrical connection between the dimmer switch 110 and the winding W2. Additionally or alternatively, in some implementations, the winding W1 may be electrically coupled to the terminal T2 of the dimmer switch interface 130 (eg, via the converter circuit 132). In these examples, the driver 122 may also be coupled to the terminal T2 of the dimmer switch interface 130 to receive the signal DIM for controlling the brightness of the light source 124.

In operation, the winding W2 carries dimming control information from the dimmer switch 110 via a converter circuit 134. The converter circuit 134 also converts the voltage across the winding W2 into a DC current to supply the dimmer switch 110. As described above, the voltage across the winding W2 can be generated at least in part by the dimmer switch 110. In addition, the voltage across the winding W2 can be transmitted to the winding W1 of the transformer 136 through magnetic coupling, and converted into a DC current by the converter circuit 132 to generate a voltage signal DIM. Then, the voltage signal DIM can be used by the driver 122 of the lamp 120 to adjust the brightness of the lamp 120. According to aspects of the invention, the converter circuit 132 may include any suitable electronic circuit configured to generate a DC signal based on an AC signal received from the winding W1. Further, according to aspects of the invention, the converter circuit 134 may include any suitable electronic circuit configured to form a desired AC signal on the winding W2.

FIG. 3 is a diagram of an example of a lighting system 300 with improved power consumption. As discussed further below, improved power consumption is achieved by using a current source that intermittently turns on and off the system's dimmer switch interface to reduce the amount of power consumed by the drive transformer. According to the example of FIG. 3, the lighting system 300 may include a dimmer switch 310, a lamp 320, and a dimmer switch interface 330 that couples the dimmer switch 310 to the lamp 320.

The dimmer switch 310 may be a 0 V to 10 V dimmer switch and / or any other suitable type of dimmer switch. The dimmer switch 310 may include a variable resistor (eg, a potentiometer) and any suitable type of device capable of placing a variable load between the terminals T1 of the dimmer switch interface 330. Additionally or alternatively, the dimmer switch 310 may include any suitable type of semiconductor device capable of changing the voltage between the terminals T1 of the dimmer switch interface 330. In short, according to aspects of the present invention, the dimmer switch 310 may be any suitable type of device capable of generating a voltage signal indicative of a desired brightness level of one of the light output from the lamp 320.

In some implementations, the dimmer switch 310 may include a light sensor configured to measure the level of ambient light near the lamp 320 and based on the measured ambient light level. Generate a voltage signal. Additionally or alternatively, in some embodiments, the dimmer switch 310 may include a knob or a slider that can be used to actuate a potentiometer that is part of the dimmer switch 310. Additionally or alternatively, the dimmer switch 310 may include a wireless receiver (e.g., a ZigBee gateway, a WiFi receiver, a remote control receiver, etc.) that is capable of receiving from a remote device (e.g., a remote device) A user's smart phone or remote control) receives an indication of a desired brightness level, and generates a corresponding voltage signal based on the indication.

The light fixture 320 may include any suitable type of light fixture. The lamp 320 may include a driver 322 and a light source 324 powered by a signal PWR. The light source 324 may include any suitable type of light source, such as a fluorescent light source, an incandescent light source, and / or one or more light emitting diodes (LEDs). In the example of the present invention, the light source 324 includes one or more LEDs, and the signal PWR is a DC or a pulse width modulation signal generated by the driver 322 based on a signal DIM received by the driver 322 from the dimmer switch interface 330. .

The signal DIM may be a voltage signal. The level of the signal DIM determines the DC magnitude and / or duty cycle of the signal PWR. If the signal DIM has a first level (for example, 2 V), the driver 322 may assign a first DC magnitude and / or a first duty cycle to the signal PWR. In contrast, if the signal DIM has a second level (for example, 5V), the driver 322 may assign a second DC value and / or a second operation different from the first DIM level on the signal PWR. cycle. As can be easily understood, the DC magnitude and / or duty cycle of the signal PWR determines the amount of current delivered to the light source 324, which in turn can determine the brightness of the light output from the light source 324.

The dimmer switch interface 330 may provide isolation between the luminaire 320 and the dimmer switch 310 to mainly protect people who operate the dimmer switch from electric shock. The dimmer switch interface 330 may include a converter circuit 332. The converter circuit 332 is coupled to a converter circuit 334 via a transformer 336. The transformer 336 can be driven by an intermittent current signal S1 generated by a current source 338. The operation of the current source 338 and the waveform of the intermittent current signal S1 are discussed in additional detail below.

The transformer 336 may include a winding W1 and a winding W2 magnetically coupled to the winding W1. Winding W1 may be electrically coupled to luminaire 320 (eg, via converter circuit 332). Winding W2 may be electrically coupled to dimmer switch 310 (eg, via converter circuit 334). In some implementations, winding W2 may be electrically coupled to terminal T1 of dimmer switch interface 330 (eg, via converter circuit 334). In these examples, the dimmer switch 310 may also be coupled to the terminal T1 to complete the electrical connection between the dimmer switch 310 and the winding W2. Additionally or alternatively, in some implementations, the winding W1 may be electrically coupled to the terminal T2 of the dimmer switch interface 330 (eg, via the converter circuit 332). In these examples, the driver 322 may also be coupled to the terminal T2 of the dimmer switch interface 330 to receive the signal DIM for controlling the brightness of the light source 324.

In operation, the winding W2 carries dimming control information from the dimmer switch 310 via a converter circuit 334. The converter circuit 334 also converts the voltage across the winding W2 into a DC current to supply the dimmer switch 310. As described above, the voltage across the winding W2 can be generated at least in part by the dimmer switch 310. In addition, the voltage across the winding W2 can be transmitted to the winding W1 of the transformer 336 through magnetic coupling, and converted into a voltage signal DIM by the converter circuit 332. Then, the voltage signal DIM can be used by the driver 322 of the lamp 320 to adjust the brightness of the lamp 320. According to aspects of the invention, the converter circuit 332 may include any suitable electronic circuit configured to generate a DC signal based on an AC signal received from the winding W1. Further, according to aspects of the invention, the converter circuit 334 may include any suitable electronic circuit configured to form a desired AC signal on the winding W2.

As described above, the current source 338 can supply the transformer 336 with an intermittent current signal S1. The signal S1 may be an alternating current signal. As illustrated in FIG. 4, the signal S1 may be periodic in nature. Each period 419 of the signal S1 may include a portion 413 during which the signal S1 has a first current level, and a portion 417 during which the signal S1 has a second current level. The second current level may be higher than the first current level. For example, in some implementations, the first current level may be 0 A and the second current level may have any value greater than 0 A.

The frequency at which the signal S1 is switched to the second current level may be referred to as a burst frequency. In some embodiments, the signal S1 may have a burst frequency of 1 Hz. However, alternative implementations are possible where the signal S1 has any suitable frequency (eg, 5 Hz, 10 Hz, 0.5 Hz, etc.).

When the signal S1 is at the first current level, the transformer 336 may be turned off (or operated in a reduced power consumption mode). When the signal S1 is at the second current level, the transformer 336 may be turned on and / or operated in a normal power loss mode. In some embodiments, by driving the transformer 336 with an intermittent current signal, the current source 338 can intermittently turn the transformer 336 on and off. This in turn may cause the transformer 336 to supply power only for a fraction of the time that the dimmer switch interface 330 is energized (or used), resulting in a reduction in power consumption.

In some embodiments, the signal S1 may be a PWM signal generated by intermittently changing its duty cycle. For example, during a portion 413 of each cycle 419, the current source 338 may switch the duty cycle of the signal S1 to a first value (eg, 0%). As another example, during a portion 417 of each cycle 419, the current source 338 may switch the duty cycle of the signal S1 to a second value (eg, 50%) greater than one of the first values.

The duration of each cycle 419 of the signal S1 can determine the response time of the dimmer switch 310. As mentioned above, in some embodiments, the duration of each cycle 419 can be 1 second. In these examples, the duration of each part 413 of cycle 419 may be 900 ms, and the duration of each part 417 of cycle 419 may be 100 ms. Alternatively, in some implementations, the duration of each portion 413 may be 980 ms and the duration of each portion 417 may be 20 ms. In short, the invention is not limited to any particular duration of portions 413 and 417 and / or cycle 419.

In some embodiments, the signal S1 can be generated based on a control signal CTRL supplied to a current source 338 through a control circuit 340. The control circuit 340 may include any suitable type of control circuit. For example, in some implementations, the control circuit can be a square wave generator and / or another type of signal generator. Additionally or alternatively, in some embodiments, the control circuit 340 may be a low-power processor and / or a general-purpose processor (e.g., an ARM-based processor) capable of performing logical operations such as comparison and branching . Additionally or alternatively, in some implementations, the control circuit 340 may include a field programmable gate array (FPGA) or an application-specific integrated circuit (ASIC). Additionally or alternatively, in some implementations, the control circuit 340 may be configured to execute one or more processor-executable instructions that, when executed by the control circuit 340, cause control Circuitry 340 executes program 700, which is discussed further below with respect to FIG. The processor-executable instructions may be stored in a memory (not shown) that is part of the dimmer switch interface 330 and / or the control circuit 340. Additionally or alternatively, the processor-executable instructions may be stored in a non-transitory computer-readable medium, such as a secure digital (SD) card. Although the control circuit 340 and the current source 338 are depicted as separate components, it will be understood that alternative implementations are possible, in which the control circuit 340 and the current source 338 are integrated with each other.

As illustrated in FIG. 5, the control signal CTRL may be a DC square wave having a period 510. Each cycle 510 may have a portion 512 in which the signal CTRL has a first duty cycle and a portion 514 in which the signal CTRL has a second duty cycle greater than one of the first duty cycle. For example, in some embodiments, the first duty cycle can be 0% and the second duty cycle can be 50%. In some implementations, the portions 512 of the control signal CTRL may have the same duration as the portions 413 of the current signal S1. Additionally or alternatively, in some implementations, portions 514 of control signal CTRL may have the same duration as portions 417 of current signal S1. The manner in which the control signal CTRL is used to generate the current signal S1 is discussed further below with respect to FIG. 6.

FIG. 6 is a diagram illustrating the internal structure of the current source 338 in further detail according to aspects of the present invention. As shown in the figure, the current source 338 may include a DC voltage source V1 and a metal oxide semiconductor field effect transistor (MOSFET) Q3. The control signal CTRL generated by the control circuit 340 can be applied to the gate of the MOSFET Q3. The drain of MOSFET Q3 can be coupled to the respective bases of an NPN transistor Q1 and a PNP transistor Q2. In addition, the collector of transistor Q1 may be coupled to the positive terminal (for example, +12 V) of voltage source V1, and the collector of transistor Q2 may be coupled to the negative terminal (for example, 0 V) of voltage source V1. The emitters of transistors Q1 and Q2 can be coupled to each other at node N3. A resistor R5 and a capacitor C4 can be coupled in series to node N3, as shown.

MOSFET Q3 can be turned on when the signal CTRL is high and turned off when the signal CTRL is low. When MOSFET Q3 is turned off, resistor R4 can forward bias NPN transistor Q1 and reverse bias PNP transistor Q2, thereby turning on NPN transistor Q1 and turning off PNP transistor Q2. When transistor Q1 is turned on and PNP transistor Q2 is turned off, as the electrical path across the positive terminal of voltage source V1 and node N3 becomes closed, a voltage near the positive terminal of V1 may appear at node N3 ( For example, +12 V). When the MOSFET Q3 is turned on, the common bases of the transistors Q1 and Q2 are pulled down, thereby turning off the NPN transistor Q1 and turning on the PNP transistor Q2. When transistor Q1 is turned off and PNP transistor Q2 is turned on, because the electrical path across the negative terminal of voltage source V1 and node N3 becomes closed, a voltage near the negative terminal of V1 may appear at node N3 ( For example, 0V). In other words, by applying the signal CTRL to the gate of the MOSFET Q3 gate, the control circuit 340 may cause a square-wave DC voltage at the frequency of the control signal CTRL to appear at the node N3. Capacitor C4 can block the DC component of the DC square wave, thereby turning it into a square AC voltage wave.

According to the examples discussed with respect to FIGS. 3 to 6, the current source 338 may be configured to always supply the transformer 336 with intermittent current. However, alternative implementations are possible in which the current source 338 is configured to supply intermittent current to the transformer 336 only when the dimmer switch 310 is in the standby mode. In these examples, when the dimmer switch 310 is not in the standby mode, the current source 338 may be configured to supply a continuous current to the transformer 336.

According to an aspect of the present invention, when the dimmer switch 310 generates a voltage signal (for example, 0 V, 10 V, etc.) that causes the driver 322 to completely turn off the light source 324 (for example, by cutting off the supply of current to the light source 324). At this time, the dimmer switch 310 may be in a standby mode. Additionally or alternatively, when the dimmer switch 310 generates a voltage signal that is less than (or greater than) a predetermined threshold value, the dimmer switch 310 may be considered to be in a standby mode. For example, when the knob on the dimmer switch is always turned in one direction, a manually operated dimmer switch may be in standby mode.

According to aspects of the invention, being able to supply intermittent current to the transformer 336 when the dimmer switch 310 is in the standby mode can help improve the energy efficiency of the lighting system 300. For example, in some implementations, switching power supply transformer 336 with an intermittent current having a duty cycle of 10% can reduce power loss by up to 90%. This reduction may be significant in jurisdictions that require the lighting system 300 to comply with laws and regulations that impose strict standby power restrictions on the lighting system.

FIG. 7 is a flowchart of an example of a procedure 700 for selectively switching a transformer with an intermittent current supply when the dimmer switch 310 is placed in a standby mode according to aspects of the present invention.

In step 710, the control circuit 340 detects the voltage level of the signal DIM. In some implementations, the control circuit 340 can detect the voltage level of the signal DIM by using an analog-to-digital converter to sample the signal DIM.

In step 720, the control circuit 340 detects whether the dimmer switch 310 is in the standby mode based on the level of the signal DIM. In some embodiments, the control circuit 340 can compare the level of the signal DIM with a predetermined threshold to detect whether the dimmer switch 310 is in the standby mode. According to a specific example, when the level of the signal DIM is lower than a threshold value, the control circuit 340 may detect that the dimmer switch 310 is in the standby mode and proceed to step 740. According to the same example, when the level of the signal DIM is higher than the threshold value, the control circuit 340 may detect that the dimmer switch 310 is not in the standby mode, and proceed to step 730. Although the control circuit 340 detects that the dimmer switch 310 is in the standby mode when the level of the signal DIM is lower than a threshold value in the example of the present invention, an alternative implementation is feasible, wherein when the level of the signal DIM is Above a threshold value, the control circuit 340 detects that the dimmer switch 310 is in the standby mode.

In step 730, the control circuit 340 supplies a continuous current to the transformer 336. To supply the intermittent current to the transformer 336, the control circuit 340 may provide a first control signal to the current source 338, which causes the current source 338 to output a continuous current. More specifically, the control circuit 340 may generate one of the control signals 810 shown in FIG. 8. As shown in the figure, the control signal 810 may be a square wave with a constant duty cycle. When the control signal 810 is supplied to the current source 338, the current source 338 can generate a continuous AC signal 820. As illustrated in FIG. 8, the current signal 820 may be the same as or similar to the signal S0 discussed above with respect to FIG. 2.

In step 740, the control circuit 340 supplies an intermittent current to the transformer 336. To supply continuous current to the transformer 336, the control circuit 340 may provide a second control signal to the current source 338, which causes the current source to output an intermittent current. More specifically, the control circuit 340 may supply one of the control signals 910 shown in FIG. 9 to the current source 338. As illustrated, the control signal 910 may be the same as or similar to the control signal CTRL discussed above with reference to FIGS. 3 to 6. When the control signal 910 is supplied to the current source 338, the current source 338 can output an intermittent alternating current signal 920, which is also shown in FIG. 9, to the transformer 336. As illustrated, the AC signal 920 may be the same as or similar to the signal S1 discussed above with respect to FIGS. 3 to 6.

Figures 1 to 9 are provided as an example only. At least some of the elements discussed with respect to these figures may be arranged, combined, and / or omitted together in a different order. For example, although in the example of FIG. 6, transistors Q1 and Q2 are switched by a MOSFET transistor, alternative implementations are possible in which any other suitable type of switching device is used instead, such as a solid state relay, A PMOS transistor and so on. Furthermore, although in the examples of the present invention, PNP transistors and NPN transistors are used to close different electrical paths between the voltage source V1 and the current source 338, alternative implementations are possible, in which any other suitable type is used instead. Switching devices, such as a solid state relay, a PMOS transistor, etc. The voltage source V1 may include any suitable type of voltage. For example, the voltage source may be a power connector. As another example, the voltage source may be a power adapter configured to convert an AC mains voltage to a DC voltage. Although the dimmer switch interface 330 and the driver 322 are shown as separate components, it will be understood that, in practice, the dimmer switch interface 330 and the driver 322 may be integrated with each other.

FIG. 10 is a top view of an electronic board 311 for an integrated LED lighting system according to an embodiment. In alternative embodiments, two or more electronic boards may be used in the LED lighting system. For example, the LED array may be on a separate electronic board, or the sensor module may be on a separate electronic board. In the illustrated example, the electronic board 311 includes a power module 312, a sensor module 314, a connection capability and control module 316, and an LED module reserved for attaching an LED array to a substrate 321.接 区 318。 Access area 318. The dimmer switch interface 330 of FIG. 3 may be part of the power module 312 or may be external to the electronic board 318 and may provide input to the power module 312.

Substrate 321 may be any board capable of mechanically supporting and providing electrical coupling to electrical components, electronic components, and / or electronic modules using conductive connectors such as tracks, traces, pads, through holes, and / or wires . The substrate 321 may include one or more metallization layers disposed between or on one or more non-conductive materials, such as a dielectric composite material. The power module 312 may include electrical and / or electronic components. In an exemplary embodiment, the power module 312 includes an AC / DC conversion circuit, a DC / DC conversion circuit, a dimming circuit, and an LED driver circuit.

The sensor module 314 may include sensors required to implement an application of the LED array. An exemplary sensor may include an optical sensor (eg, an IR sensor and an image sensor), a motion sensor, a thermal sensor, a mechanical sensor, a proximity sensor, or even a timer. By way of example, it can be turned off / on based on several different sensor inputs (such as the detected presence of one of the users, detected ambient lighting conditions, detected weather conditions) or based on the time of day / night and / Or adjust LEDs in street lighting, general lighting and horticultural lighting applications. This may include, for example, adjusting the intensity of the light output, the shape of the light output, the color of the light output, and / or turning the lights on or off to save energy. For AR / VR applications, motion sensors can be used to detect user movement. The motion sensor itself may be an LED, such as an IR detector LED. As another example, for camera flash applications, images and / or other optical sensors or pixels can be used to measure the lighting used for a scene to be captured, so that the flash lighting color and intensity lighting can be optimally calibrated Pattern and / or shape. In an alternative embodiment, the electronic board 311 does not include a sensor module.

The connectivity and control module 316 may include a system microcontroller and any type of wired or wireless module configured to receive a control input from an external device. By way of example, a wireless module may include Bluetooth, Zigbee, Z-wave, mesh, WiFi, near field communication (NFC) and / or peer-to-peer modules may be used. A microcontroller can be any type of dedicated computer or processor that can be embedded in an LED lighting system and configured or configurable to receive input (such as a sensor) from a wired or wireless module or other module in the LED system Sensor data and feedback data from the LED module) and provide control signals to other modules based on the input. The microcontroller may be part of the control circuit 340 of FIG. 3 or may include the control circuit 340 of FIG. 3 as disclosed herein. Algorithms implemented by a dedicated processor may be implemented in a computer program, software, or firmware incorporated in a non-transitory computer-readable storage medium for execution by a dedicated processor. Examples of non-transitory computer-readable storage media include a read-only memory (ROM), a random access memory (RAM), a scratchpad, a cache memory, and a semiconductor memory device. The memory may be included as part of the microcontroller or may be implemented on the electronic board 311 or elsewhere externally.

The term module as used herein may refer to electrical and / or electronic components disposed on individual circuit boards that can be soldered to one or more electronic boards 311. However, the term module can also refer to electrical and / or electronic components that provide similar functionality but can be individually soldered to one or more circuit boards in the same region or in different regions.

FIG. 11A is a top view of one of the electronic boards 311, in which an LED array 410 is attached to a substrate 321 at an LED device attachment area 318 in one embodiment. The electronic board 311 and the LED array 410 represent an LED lighting system 400A. In addition, the power module 312 receives a voltage input at Vin 497 and receives a control signal from the connection capability and control module 316 via the trace 418B, and provides a driving signal to the LED array 410 via the trace 418A. The LED array 410 is turned on and off by a driving signal from the power module 312. In the embodiment shown in FIG. 11A, the connection capability and control module 316 receives the sensor signal from the sensor module 314 via the trace 418C.

FIG. 11B illustrates one embodiment of a dual-channel integrated LED lighting system with one of the electronic components mounted on both surfaces of a circuit board. As shown in FIG. 11B, an LED lighting system 400B includes a first surface 445A having an input for receiving a dimmer signal and an AC power signal, and an AC / DC converter installed thereon.器 电路 412. The LED system 400B includes a second surface 445B having a dimmer interface circuit 415, DC-DC converter circuits 440A and 440B, a connection capability of a microcontroller 472, and a control module 416 (in A wireless module in this example), and an LED array 410 mounted thereon. The LED array 410 is driven by two independent channels 411A and 411B. In alternative embodiments, a single channel may be used to provide driving signals to an LED array, or any number of multiple channels may be used to provide driving signals to an LED array. For example, FIG. 11E illustrates an LED lighting system 400E having one of three channels, and is described in further detail below. The dimmer switch interface 330 of FIG. 3 may be part of the dimmer interface circuit 415 and may provide an input to the microcontroller 472.

The LED array 410 may include two groups of LED devices. In an exemplary embodiment, the LED devices of group A are electrically coupled to a first channel 411A, and the LED devices of group B are electrically coupled to a second channel 411B. Each of the two DC-DC converters 440A and 440B can provide a respective driving current for driving a respective LED group A and B in the LED array 410 via a single channel 411A and 411B, respectively. LEDs in one of the LED groups can be configured to emit light having a color point different from the LEDs in the second LED group. By controlling the current and / or duty cycle applied by the individual DC / DC converter circuits 440A and 440B through a single channel 411A and 411B, respectively, the composite color point of the light emitted by the LED array 410 can be tuned within a range control. Although the embodiment shown in FIG. 11B does not include a sensor module (as described in FIGS. 10 and 11A), an alternative embodiment may include a sensor module.

The illustrated LED lighting system 400B is an integrated system in which the LED array 410 and a circuit for operating the LED array 410 are provided on a single electronic board. Connections between modules on the same surface of the circuit board 499 may be electrically coupled to interconnect by surface or subsurface (such as traces 431, 432, 433, 434, and 435 or metallization (not shown)) Exchange (for example) voltage, current, and control signals between modules. Connections between modules on opposite surfaces of the circuit board 499 may be electrically coupled by through-board interconnects such as through-holes and metallization (not shown).

FIG. 11C illustrates an embodiment of an LED lighting system, wherein the LED array is on an electronic board separate from the driver and control circuit. The LED lighting system 400C includes a power module 452, which is mounted on an electronic board separated from an LED module 490. The power module 452 on a first electronic board may include an AC / DC converter circuit 412, a sensor module 414, a connection capability and control module 416, a dimmer interface circuit 415, and a DC / DC converter 440. The LED module 490 may include embedded LED calibration and setting data 493 and an LED array 410 on a second electronic board. Data, control signals, and / or LED driver input signals 485 can be exchanged between the power module 452 and the LED module 490 via wires that can electrically and communicatively couple the two modules. The embedded LED calibration and setting data 493 may contain any data required by other modules in a given LED lighting system to control how to drive the LEDs in the LED array. In one embodiment, the embedded calibration and setting data 493 may include a microcontroller generating or modifying an instruction that the driver uses (for example) a pulse width modulation (PWM) signal to provide power to each of the LED groups A and B. -Information required for control signals. In this example, the calibration and setting data 493 may inform the microcontroller 472 about, for example, the number of power channels to be used, a desired color point of one of the composite lights provided by the entire LED array 410, and / or by AC / The DC converter circuit 412 provides a percentage of the power provided to each channel. As disclosed herein, the dimmer switch interface 330 of FIG. 3 may be part of the dimmer interface circuit 415.

11D illustrates a block diagram of an LED lighting system with the LED array on some electronic board separated from the driver circuit along with some electronics. An LED system 400D includes a power conversion module 483 and an LED module 481 positioned on a separate electronic board. The power conversion module 483 may include an AC / DC converter circuit 412, a dimmer interface circuit 415, and a DC-DC converter circuit 440, and the LED module 481 may include embedded LED calibration and setting data 493, an LED array 410, The sensor module 414 and the connection capability and control module 416. The power conversion module 483 can provide the LED driver input signal 485 to the LED array 410 via a wired connection between the two electronic boards.

FIG. 11E is a diagram showing an exemplary LED lighting system 400E of a multi-channel LED driver circuit. In the illustrated example, the system 400E includes a power module 452, an LED module 491 including embedded LED calibration and setting data 493, and an LED array 494 including three LED groups 494A, 494B, and 494C. Although three LED groups are shown in FIG. 11E, those of ordinary skill in the art will recognize that any number of LED groups consistent with the embodiments described herein may be used. In addition, although individual LEDs in each group are configured in series, they may be configured in parallel in some embodiments.

The LED array 494 may include groups of LEDs that provide light with different color points. For example, the LED array 494 may include a warm white light source via a first LED group 494A, a cold white light source via a second LED group 494B, and a neutral white light via a third LED group 494C. light source. The warm white light source passing through the first LED group 494A may include one or more LEDs configured to provide white light having a correlated color temperature (CCT) of approximately 2700K. The cool white light source passing through the second LED group 494B may include one or more LEDs configured to provide white light with a CCT of approximately 6500K. The neutral white light source via the third LED group 494C may include one or more LEDs configured to provide light having a CCT of approximately 4000K. Although various white LEDs are described in this example, those of ordinary skill in the art will recognize that other color combinations consistent with the embodiments described herein are feasible to provide the LEDs from the LED array 494 with various overall colors. A composite light output.

The power module 452 may include a tunable light engine (not shown) that can be configured to supply power to the LED array via three separate channels (indicated as LED1 +, LED2 +, and LED3 + in FIG. 11E). 494. More specifically, the tunable light engine can be configured to supply a first PWM signal to a first LED group 494A (such as a warm white light source) via a first channel, and a second PWM via a second channel The signal is supplied to the second LED group 494B, and a third PWM signal is supplied to the third LED group 494C via a third channel. Each signal provided through a respective channel can be used to power the corresponding LED or LED group, and the duty cycle of the signal can determine the overall duration of the on and off states of each respective LED. The duration of the on and off states may result in an overall light effect, which may have duration-based light properties (eg, correlated color temperature (CCT), color point, or brightness). In operation, the tunable light engine can change the relative magnitudes of the duty cycles of the first signal, the second signal, and the third signal to adjust the respective optical properties of each of the LED groups to provide the desired emission from the LED array 494. Of composite light. As described above, the light output of the LED array 491 may have a color point based on a combination (eg, a mixture) of light emissions from each of the LED groups 494A, 494B, and 494C.

In operation, the power module 452 may receive a control input generated based on a user and / or sensor input and provide a signal through an individual channel to control the composite color of light output by the LED array 494 based on the control input. In some embodiments, a user can provide input to the LED system for control by turning a knob or moving a slider that can be (for example) part of a sensor module (not shown) DC / DC converter circuit. Additionally or alternatively, in some embodiments, a user may use a smartphone and / or other electronic device to provide input to the LED lighting system 400E to transmit an indication of a desired color to a wireless module ( Not shown).

FIG. 12 shows an exemplary system 550 including an application platform 560, LED lighting systems 552 and 556, and secondary optics 554 and 558. The LED lighting system 552 generates a light beam 561 shown between the arrows 561a and 561b. The LED lighting system 556 may generate a light beam 562 between the arrows 562a and 562b. In the embodiment shown in FIG. 12, light emitted from the LED lighting system 552 passes through the secondary optics 554, and light emitted from the LED lighting system 556 passes through the secondary optics 558. In an alternative embodiment, the beams 561 and 562 do not pass through any secondary optics. The secondary optics may be or may include one or more light guides. One or more light guides may be edge illuminated or may have an internal opening that defines one of the inner edges of the light guide. The LED lighting system 552 and / or 556 can be inserted into the internal openings of one or more light guides, such that they inject light into the inner edges (internally open light guides) or the outer edges (edge-illuminated light guides) of one or more light guides . The LEDs in the LED lighting system 552 and / or 556 may be arranged around the circumference of a substrate that is part of the light guide. According to an embodiment, the substrate may be thermally conductive. According to an embodiment, the substrate may be coupled to a heat-dissipating element disposed above the light guide. The heat dissipation element may be configured to receive heat generated by the LED via the thermally conductive substrate and dissipate the received heat. One or more light guides may allow light emitted by the LED lighting systems 552 and 556 to be shaped in a desired manner, such as, for example, having a gradient, a chamfer distribution, a narrow distribution, a wide distribution, an angular distribution, or Similar).

In an exemplary embodiment, the system 550 may be a mobile phone of a camera flash system, indoor residential or commercial lighting, outdoor lights (such as street lighting), a car, a medical device, an AR / VR device, and a robotic device. The integrated LED lighting system 400A shown in FIG. 11A, the integrated LED lighting system 400B shown in FIG. 11B, the LED lighting system 400C shown in FIG. 11C, and the LED lighting system 400D shown in FIG. 11D illustrate LEDs in an exemplary embodiment Lighting systems 552 and 556.

In an exemplary embodiment, the system 550 may be a mobile phone of a camera flash system, indoor residential or commercial lighting, outdoor lights (such as street lighting), a car, a medical device, an AR / VR device, and a robotic device. The integrated LED lighting system 400A shown in FIG. 11A, the integrated LED lighting system 400B shown in FIG. 11B, the LED lighting system 400C shown in FIG. 11C, and the LED lighting system 400D shown in FIG. 11D illustrate LEDs in an exemplary embodiment Lighting systems 552 and 556.

The application platform 560 may provide power to the LED lighting systems 552 and / or 556 via a power bus via line 565 or other suitable input, as discussed herein. In addition, the application platform 560 can provide an input signal for the operation of the LED lighting system 552 and the LED lighting system 556 via line 565. The input can be based on a user input / preference, a sensing read, a pre-programmed or autonomous decision Output or similar. One or more sensors may be inside or outside the housing of the application platform 560.

In various embodiments, the application platform 560 sensor and / or LED lighting system 552 and / or 556 sensor may collect data, such as visual data (e.g., LIDAR data, IR data, data collected via a camera, etc.) ), Audio data, distance-based data, mobile data, environmental data, or the like or a combination thereof. Information may be related to a physical item or entity (such as an object, person, vehicle, etc.). For example, the sensing device may collect object proximity data for an ADAS / AV-based application, which may determine the priority of detection and subsequent actions based on the detection of a physical item or entity. The data may be collected based on, for example, emitting a light signal (such as an IR signal) by the LED lighting systems 552 and / or 556 and collecting data based on the emitted light signal. Data may be collected by a component different from the component that emits the optical signal used for data collection. Continuing the example, the sensing device may be positioned on a car and may use a vertical cavity surface emitting laser (VCSEL) to emit a light beam. One or more sensors may sense a response to the emitted light beam or any other suitable input.

In an exemplary embodiment, the application platform 560 may represent a car and the LED lighting system 552 and the LED lighting system 556 may represent a car headlight. In various embodiments, the system 550 may represent a car with a steerable light beam, where the LEDs are selectively activated to provide steerable light. For example, an array of LEDs can be used to define or project a shape or pattern or to illuminate only selected sections of a road. In an exemplary embodiment, the infrared camera or detector pixels in the LED lighting system 552 and / or 556 may be sensors that identify a portion of a scene (road, pedestrian crossing, etc.) that needs to be illuminated.

FIG. 13A is a diagram of an LED device 201 in an exemplary embodiment. The LED device 201 may include a substrate 202, an active layer 204, a wavelength conversion layer 206, and a main optical device 208. In other embodiments, an LED device may not include a wavelength converter layer and / or a main optical device. The individual LED devices 201 may be included in an LED array in an LED lighting system, such as any of the LED lighting systems described above.

As shown in FIG. 13A, the active layer 204 may be adjacent to the substrate 202 and emit light when excited. Suitable materials for forming the substrate 202 and the active layer 204 include sapphire, SiC, GaN, and polysilicon, and more specifically may be formed of: a III-V semiconductor, including (but not limited to) AlN, AlP , AlAs, AlSb, GaN, GaP, GaAs, GaSb, InN, InP, InAs, InSb; Group II-VI semiconductors, including (but not limited to) ZnS, ZnSe, CdSe, CdTe; Group IV semiconductors, including (but not limited to) ) Ge, Si, SiC; and mixtures or alloys thereof.

The wavelength conversion layer 206 may be remote from, adjacent to, or directly above the active layer 204. The active layer 204 emits light into the wavelength conversion layer 206. The wavelength conversion layer 206 functions to further modify the wavelength of the emitted light through the active layer 204. LED devices that include a wavelength conversion layer are often referred to as phosphor-converted LEDs ("PCLEDs"). The wavelength conversion layer 206 may include any luminescent material, such as, for example, a transparent or translucent adhesive or phosphor particles in a matrix or a ceramic phosphor element that absorbs light of one wavelength and emits light of a different wavelength .

The main optics 208 may be on or above one or more of the LED devices 200 and allow light to pass through the main optics 208 from the active region 204 and / or the wavelength conversion layer 206. The main optical device 208 may be a lens or package configured to protect one or more layers and at least partially shape the output of the LED device 200. The primary optics 208 may include transparent and / or translucent materials. In an exemplary embodiment, light passing through the main optics may be emitted based on a Lambertian distribution pattern. It will be appreciated that one or more properties of the main optics 208 may be modified to produce a light distribution pattern that is different from one of the Lambertian distribution patterns.

FIG. 13B shows a cross-sectional view of an illumination system 220 including an LED array 210 having pixels 201A, 201B, and 201C and one of the secondary optics 212 in an exemplary embodiment. The LED array 210 includes pixels 201A, 201B, and 201C, each of which includes a respective wavelength conversion layer 206B, an active layer 204B, and a substrate 202B. The LED array 210 may be a single LED array manufactured using wafer-level processing technology, a micro LED with a sub-500 micron size, or the like. The pixels 201A, 201B, and 201C in the LED array 210 may be formed using array segmentation or alternatively using placement techniques.

The space 203 displayed between one or more of the pixels 201A, 201B, and 201C may include an air gap or may be filled with a material such as a metallic material that may be a contact (eg, n-contact).

The secondary optics 212 may include one or both of a lens 209 and a waveguide 207. It will be understood that although the secondary optics are discussed in accordance with the examples shown, in an exemplary embodiment, the secondary optics 212 may be used to diffuse incoming light (divergent optics) or to focus the incoming light into a collimated beam (Collimation optics). In an exemplary embodiment, the waveguide 207 may be a light collector and may have any suitable shape to focus light, such as a parabolic shape, a conical shape, a beveled shape, or the like. The waveguide 207 may be coated with a dielectric material, a metallized layer, or the like for reflecting or redirecting incident light. In an alternative embodiment, an illumination system may not include one or more of the following: a conversion layer 206B; a main optical device 208B; a waveguide 207; and a lens 209.

The lens 209 may be formed of any suitable transparent material, such as (but not limited to) SiC, alumina, diamond, or the like, or a combination thereof. The lens 209 can be used to modify a beam of light input into the lens 209 such that an output beam from the lens 209 will efficiently meet a desired photometric specification. In addition, the lens 209 may be used for one or more aesthetic purposes, such as by determining that one of the LED devices 201A, 201B, and / or 201C of the LED array 210 illuminates and / or illuminates the appearance.

The embodiments have been described in detail, and those skilled in the art will appreciate that, given the present description, modifications can be made to the embodiments described herein without departing from the spirit of the inventive concept. Therefore, the scope of the invention is not intended to be limited to the specific embodiments illustrated and described.

100‧‧‧lighting system

110‧‧‧Dimmer switch

120‧‧‧Lighting

122‧‧‧Driver

124‧‧‧light source

130‧‧‧ dimmer switch interface

132‧‧‧ converter circuit

134‧‧‧ converter circuit

136‧‧‧Transformer

138‧‧‧current source

201‧‧‧LED devices

201A‧‧‧pixels

201B‧‧‧pixels

201C‧‧‧Pixels

202‧‧‧ substrate

202B‧‧‧ Substrate

203‧‧‧space

204‧‧‧Action layer

204B‧‧‧Action layer

206‧‧‧wavelength conversion layer

206B‧‧‧wavelength conversion layer

207‧‧‧Wave

208‧‧‧Main Optics

208B‧‧‧Main Optics

209‧‧‧Lens

210‧‧‧ Light Emitting Diode (LED) Array

212‧‧‧secondary optics

220‧‧‧lighting system

300‧‧‧lighting system

310‧‧‧ Dimmer Switch

311‧‧‧electronic board

312‧‧‧Power Module

314‧‧‧Sensor module

316‧‧‧ Connectivity and Control Module

318‧‧‧light-emitting diode (LED) attachment area

320‧‧‧Lighting

321‧‧‧ substrate

322‧‧‧Driver

324‧‧‧light source

330‧‧‧ dimmer switch interface

332‧‧‧ converter circuit

334‧‧‧ converter circuit

336‧‧‧Transformer

338‧‧‧Current source

340‧‧‧Control circuit

400A‧‧‧Light Emitting Diode (LED) Lighting System

400B‧‧‧Light Emitting Diode (LED) Lighting System

400C‧‧‧Light Emitting Diode (LED) Lighting System

400D‧‧‧Light Emitting Diode (LED) Lighting System

400E‧‧‧LED Lighting System

410‧‧‧Light Emitting Diode (LED) Array

411A‧‧‧First channel

411B‧‧‧Second Channel

412‧‧‧AC / DC converter circuit

413‧‧‧part

414‧‧‧Sensor Module

415‧‧‧ dimmer interface circuit

416‧‧‧ Connectivity and Control Module

417‧‧‧part

418A‧‧‧trace

418B‧‧‧trace

418C‧‧‧trace

419‧‧‧cycle

431‧‧‧trace

432‧‧‧trace

433‧‧‧trace

434‧‧‧trace

435‧‧‧trace

440‧‧‧DC / DC converter

440A‧‧‧DC-DC converter circuit

440B‧‧‧DC-DC converter circuit

445A‧‧‧First surface

445B‧‧‧Second surface

452‧‧‧Power Module

472‧‧‧Microcontroller

483‧‧‧Power Conversion Module

485‧‧‧light-emitting diode (LED) driver input signal

490‧‧‧light-emitting diode (LED) module

491‧‧‧light-emitting diode (LED) array

493‧‧‧ Embedded light-emitting diode (LED) calibration and setting data

494‧‧‧LED Array

494A‧‧‧First Light Emitting Diode (LED) Group

494B‧‧‧Second Light Emitting Diode (LED) Group

494C‧‧‧Third Light Emitting Diode (LED) Group

497‧‧‧Vin

510‧‧‧cycle

512‧‧‧part

514‧‧‧part

550‧‧‧system

552‧‧‧light-emitting diode (LED) lighting system

554‧‧‧secondary optics

556‧‧‧Light Emitting Diode (LED) Lighting System

558‧‧‧ secondary optics

560‧‧‧Application Platform

561‧‧‧beam

561a‧‧‧arrow

561b‧‧‧arrow

562‧‧‧beam

562a‧‧‧arrow

562b‧‧‧arrow

565‧‧‧line

700‧‧‧ procedure

710‧‧‧step

720‧‧‧step

730‧‧‧step

740‧‧‧step

810‧‧‧Control signal

820‧‧‧Continuous AC signal

910‧‧‧Control signal

920‧‧‧ intermittent AC signal

C4‧‧‧Capacitor

CTRL‧‧‧Control signal

DIM‧‧‧Voltage Signal

N3‧‧‧node

PWR‧‧‧Signal

Q1‧‧‧NPN Transistor

Q2‧‧‧PNP transistor

Q3‧‧‧ metal oxide semiconductor field effect transistor (MOSFET)

R4‧‧‧ Resistor

R5‧‧‧ resistor

S0‧‧‧continuous current signal

S1‧‧‧Intermittent current signal

T1‧‧‧Terminal

T2‧‧‧Terminal

V1‧‧‧DC voltage source

W1‧‧‧winding

W2‧‧‧winding

The drawings described below are for illustration purposes only. The drawings are not intended to limit the scope of the invention. The same component symbols shown in the figures designate the same parts in the embodiments.

1 is a schematic diagram of an example of an illumination system according to an aspect of the present invention;

2 is a diagram of a current signal for driving a transformer in a dimmer switch interface of the lighting system of FIG. 1 according to an aspect of the present invention;

3 is a schematic diagram of another example of a lighting system according to an aspect of the present invention;

4 is a diagram of a current signal for driving a transformer in a dimmer switch interface of a lighting system of FIG. 3 according to an aspect of the present invention;

5 is a diagram of a control signal for controlling an operation of a current source in a dimmer switch interface of the lighting system of FIG. 3 according to aspects of the present invention;

6 is a circuit diagram of an example of a current source in the dimmer switch interface of the lighting system of FIG. 3 according to aspects of the present invention;

7 is a flowchart of an example of a program executed by a controller that is part of a dimmer switch interface of the lighting system of FIG. 3 according to aspects of the present invention;

8 is a diagram illustrating a control signal and a corresponding current signal generated by the current source in the dimmer switch interface of the lighting system of FIG. 3 according to aspects of the present invention;

9 is a diagram illustrating another control signal and another corresponding current signal generated by the current source in the dimmer switch interface of the lighting system of FIG. 3 according to aspects of the present invention;

10 is a top view of an electronic board for an integrated LED lighting system according to an embodiment;

11A is a top view of one of the electronic boards, wherein the LED array is attached to the substrate at the LED device attachment area in one embodiment;

11B is a diagram of an embodiment of a dual-channel integrated LED lighting system with one of the electronic components mounted on both surfaces of a circuit board;

11C is a diagram of an embodiment of an LED lighting system, in which the LED array is on an electronic board separated from the driver and the control circuit;

11D is a block diagram of an LED lighting system on an electronic board separated from the driver circuit with the LED array together with some electronic devices;

11E is a diagram showing an exemplary LED lighting system of a multi-channel LED driver circuit;

FIG. 12 is a diagram of an exemplary application system; FIG.

FIG. 13A is a diagram showing an LED device; and

FIG. 13B is a diagram showing one of a plurality of LED devices.

Claims (20)

  1. A device includes: A dimmer switch interface, including: (i) a transformer having a first winding magnetically coupled to a second winding, the first winding being electrically coupled to a pair of terminals, and (ii) a current source configured to supply an intermittent alternating current to the second winding, the intermittent alternating current having a periodic waveform, each period of the waveform including during which the current is fixed at a predetermined fixed low value A first part and a second part during which the current alternates between a high value and a low value.
  2. The device of claim 1, wherein the transformer is intermittently turned on and off due to the intermittent alternating current power supply.
  3. The device of claim 1, wherein the first part of any period has a longer duration than the second part of the same period.
  4. The device of claim 1, wherein the current source is configured to provide the intermittent alternating current to the transformer only when a dimmer switch is in a standby mode, the standby mode is at least partially A pattern of voltage signals that fall within a predetermined range.
  5. The device of claim 1, wherein the dimmer switch interface further includes a control circuit configured to receive a signal through the pair of terminals for connecting the dimmer switch interface to a dimmer switch The control circuit is configured to: When the signal has a first value, causing the current source to provide the intermittent alternating current to the transformer; and When the signal has a second value, the current source is caused to provide a continuous AC power to the transformer.
  6. As in the device of claim 1, about 10% of the intermittent alternating current duty cycle reduces the power loss by at least 80%.
  7. A system including: A dimmer switch; and A dimmer switch interface is coupled to the dimmer switch. The dimmer switch interface includes: (i) a transformer having a first winding magnetically coupled to a second winding, the first winding being electrically coupled to the dimmer switch, and (ii) a current source configured to supply an intermittent alternating current to the second winding, the intermittent alternating current having a periodic waveform including each period of the waveform during which the intermittent alternating current is fixed at a predetermined fixed low The first part of the value and the second part during which the intermittent alternating current alternates between a high value and a low value.
  8. The system of claim 7, wherein the transformer is intermittently turned on and off due to the intermittent AC power supply.
  9. The system of claim 7, wherein the first part of any period has a longer duration than the second part of the same period.
  10. The system of claim 7, wherein the current source is configured to provide the intermittent AC power to the transformer only when the dimmer switch is in a standby mode, the standby mode is a situation where the dimmer switch generates a luminaire A driver turns off a mode of a voltage signal of a light source of the luminaire.
  11. The system of claim 7, wherein the dimmer switch interface further includes a control circuit configured to receive a signal generated at least in part by the dimmer switch, and the control circuit is configured to: When the signal has a first value, causing the current source to provide the intermittent alternating current to the transformer; and When the signal has a second value, the current source is caused to provide a continuous AC power to the transformer.
  12. As in the system of claim 7, approximately 10% of the intermittent alternating current duty cycle reduces power consumption by at least 80%.
  13. A system including: A luminaire comprising a driver coupled to a light source; and A dimmer switch is coupled to the driver via a dimmer switch interface. The dimmer switch interface includes: (i) a transformer having a first winding magnetically coupled to a second winding, the first winding being electrically coupled to the dimmer switch, and the second winding being electrically coupled to the driver of the luminaire ,and (ii) a current source configured to supply an intermittent alternating current to the second winding, the intermittent alternating current having a periodic waveform including each period of the waveform during which the intermittent alternating current is fixed at a predetermined fixed low The first part of the value and the second part during which the intermittent alternating current alternates between a high value and a low value.
  14. The system of claim 13, wherein the transformer is intermittently turned on and off due to the intermittent AC power supply.
  15. The system of claim 13, wherein the first part of any period has a longer duration than the second part of the same period.
  16. The system of claim 13, wherein the current source is configured to provide the intermittent alternating current to the transformer only when the dimmer switch is in a standby mode, the standby mode is caused by the dimmer switch to cause the luminaire The driver turns off a mode of a voltage signal of the light source of the lamp.
  17. The system of claim 13, wherein the dimmer switch interface further includes a control circuit configured to receive a signal generated at least in part by the dimmer switch, and the control circuit is configured to: When the signal has a first value, causing the current source to provide the intermittent alternating current to the transformer; and When the signal has a second value, the current source is caused to provide a continuous AC power to the transformer.
  18. As in the system of claim 13, approximately 10% of the intermittent alternating current duty cycle reduces power consumption by at least 80%.
  19. A method comprising: Detecting a voltage level of a DIM signal; Determining whether a dimmer switch is in a standby mode; In the event that the dimmer switch is determined to be in a standby mode, supplying an intermittent alternating current to a transformer; and In the event that the dimmer switch is determined not to be in a standby mode, a continuous current is supplied to the transformer.
  20. The method of claim 19, wherein the intermittent alternating current includes a periodic waveform, and each period of the waveform includes a period during which the intermittent alternating current is fixed at one of a predetermined fixed low value and the intermittent alternating current during a period of A second part that alternates between a high value and a low value.
TW107146264A 2017-12-20 2018-12-20 Dimmer interface having reduced power consumption TW201931949A (en)

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US15/849,176 2017-12-20
EP18155273 2018-02-06
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Publication number Priority date Publication date Assignee Title
TWI255985B (en) * 2004-12-06 2006-06-01 Benq Corp A standby mode power saving electronic apparatus, power supply and method of powering the standby mode power saving electronic apparatus
TWM411075U (en) * 2010-12-15 2011-09-01 Cal Comp Electronics & Comm Co Driving device of light emitting diode and lighting apparatus using the same
RU2013140391A (en) * 2011-01-31 2015-03-10 Конинклейке Филипс Электроникс Н.В. Device and method for matching input signal for control of light power regulation with a driver of lighting with regulation of light power with electrical insulation
US8669715B2 (en) * 2011-04-22 2014-03-11 Crs Electronics LED driver having constant input current
US9602018B2 (en) * 2012-03-20 2017-03-21 Infineon Technologies Austria Ag Power converter with reduced power consumption in standby mode
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US9585210B2 (en) * 2015-04-30 2017-02-28 Hubbell Incorporated Reduced flicker driver circuit for LED systems

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