Dimming and color temperature adjustment control method and device

Abstract

To provide a method and device for dimming and color temperature adjustment control.SOLUTION: The device includes a housing, and a zero crossing detection circuit, a control circuit, a carrier phase cut circuit and a power supply circuit in the housing, and a control panel for operating color temperature and brightness is provided on the housing. The zero crossing detection circuit is used to detect a position of a zero crossing point of a commercial power supply. The control circuit is configured to calculate a chopping position according to the brightness adjustment amount and the position of the zero crossing point, and encode the color temperature adjustment amount to generate a color temperature encoding signal. The carrier phase-cut circuit is configured to chop the mains supply according to the chopping position to generate a phase-cut dimming signal, and load the color temperature encoding signal on the phase-cut dimming signal. The control device for dimming and color temperature adjustment can realize the adjustment of the brightness and color temperature of the luminaire without additionally laying a dimming circuit, and can adjust the brightness and color temperature at the same time, with a fast response speed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the technical field of dimming, and in particular to a method and device for controlling dimming and color temperature adjustment. [Background technology]

[0002] As people's living standards continue to improve, their requirements for light sources are becoming increasingly higher, and the demands for lamp color temperatures are becoming increasingly diverse. In old buildings, only the power lines that supply power to lighting fixtures are pre-installed, so if you want to adjust the lamp color temperature, you need to lay a separate dimming line, which makes installation and wiring complicated and increases the cost of retrofitting. To avoid laying an additional dimming line to adjust the lamp color temperature or brightness, some products on the market use power line carrier technology to encode dimming signals or color temperature signals and load them into the mains power supply. However, currently, dimming controllers using power line carrier technology can only transmit dimming or color adjustment information via the mains power supply each time, resulting in slow adjustment response speeds and inconvenience. Summary of the Invention [Problem to be solved by the invention]

[0003] In order to overcome the drawbacks of the prior art, the object of the present invention is to provide a dimming and color temperature control device that can adjust the brightness and color temperature of a lamp without the need to install an additional dimming circuit, and at the same time can transmit dimming and color adjustment information to a dimming power supply or light source, and has a fast dimming response speed. [Means for solving the problem]

[0004] In order to solve the above problems, the technical means adopted by the present invention is as follows: A dimming and color temperature adjustment control device, comprising a housing, a control panel, and a control circuit board, the control circuit board is provided within the housing, and a zero-cross detection circuit, a control circuit, a carrier phase cut circuit, and a power supply circuit are provided on the control circuit board, the zero-cross detection circuit is used to detect the position of a zero-cross point of a commercial power supply, the control circuit is electrically connected to an output terminal of the zero-cross detection circuit, and is used to calculate a chopping position according to the brightness adjustment amount and the position of the zero-cross point, encode the color temperature adjustment amount, and generate a color temperature encoded signal, the carrier phase cut circuit is electrically connected to an output terminal of the control circuit, and The power supply circuit is used to chop commercial power based on the chopping position to generate a phase-cut dimming signal and to superimpose the color temperature encoded signal onto the phase-cut dimming signal, the power supply circuit is used to supply power to the zero-cross detection circuit, the control circuit and the carrier phase cut circuit, the control panel is provided on the housing, and a brightness operation module and a color temperature operation module are provided on the control panel, the brightness operation module is electrically connected to the control circuit and is used to input the brightness adjustment amount, and the color temperature operation module is electrically connected to the control circuit and is used to input the color temperature adjustment amount.

[0005] Compared with the prior art, the advantageous effect of the present invention is that a phase-cut dimming method is used to adjust the brightness of a lighting fixture, and a color temperature encoded signal generated by encoding a color temperature adjustment amount is superimposed on a phase-cut dimming signal, allowing the brightness and color temperature of the lamp to be adjusted using only the power line of the lighting fixture. The information on the brightness adjustment amount is represented by the length of the conduction time of the phase-cut dimming signal, and the information on the color temperature adjustment amount is represented by the color temperature encoded signal superimposed on the phase-cut dimming signal, and the two information can be simultaneously superimposed on the phase-cut dimming signal, making them easy to distinguish from each other and preventing interference between them. Brightness and color temperature can be adjusted simultaneously, resulting in a fast adjustment response and an improved user experience.

[0006] In the above dimming and color temperature adjustment control device, the control circuit board further includes a brightness signal processing circuit and a color temperature signal processing circuit, the brightness operation module is electrically connected to the control circuit via the brightness signal processing circuit, the color temperature operation module is electrically connected to the control circuit via the color temperature signal processing circuit, the brightness signal processing circuit is used to receive the brightness adjustment signal output from the brightness operation module, convert the brightness adjustment signal into a corresponding brightness control voltage, and output it to the control circuit, and the color temperature operation module is used to receive the color temperature adjustment signal output from the color temperature operation module, convert the color temperature adjustment signal into a corresponding color temperature control voltage, and output it to the control circuit.

[0007] In the above dimming and color temperature adjustment control device, the input end of the control circuit board is a single firewire input, and the single firewire input end is connected to the firewire of the commercial power supply, and the output end of the control circuit board is a single-wire output, and the single-wire output end is connected to one input end of the phase-cut dimming power supply, and the other input end of the phase-cut dimming power supply is connected to the neutral line of the commercial power supply to form a current loop.

[0008] In the above dimming and color temperature control device, the brightness control module and the color temperature control module can both be potentiometer, touch screen, encoder, or keypad control panel.

[0009] In the above dimming and color temperature adjustment control device, an external circuit is provided on the control circuit board, the external circuit is electrically connected to the control circuit, and is used to set the minimum brightness level adjustment and switch between leading edge phase cut and trailing edge phase cut, and the external circuit can be composed of a potentiometer, a DIP switch, or an NFC circuit.

[0010] The dimming / color temperature adjustment control device further includes a wireless communication circuit electrically connected to the control circuit for wirelessly controlling the control circuit.

[0011] In the dimming and color temperature adjustment control device, the carrier phase cut circuit places the color temperature encoded signal on the start segment or end segment of the phase cut dimming signal.

[0012] In the above dimming and color temperature adjustment control device, the control panel is further provided with a switch module, and the switch of the switch module is connected in series between the commercial power supply and the control circuit board to control the conduction and cutoff between the commercial power supply and the control circuit board, or the switch module is electrically connected to the power supply circuit and / or the control circuit to put the dimming and color temperature adjustment control device into standby or normal operating state.

[0013] A dimming and color temperature control method, obtaining a brightness adjustment amount and a color temperature adjustment amount; encoding the color temperature adjustment amount into a color temperature encoded signal according to a preset encoding rule; calculating a chopping position based on the brightness adjustment amount and the position of a zero cross point of the commercial power supply; chopping the commercial power supply based on the chopping position to generate a phase-cut dimming signal; and a step of superimposing the color temperature encoded signal onto the phase-cut dimming signal; The above method, comprising:

[0014] In the above dimming and color temperature adjustment control method, the step of superimposing the color temperature encoded signal onto the phase-cut dimming signal includes superimposing the color temperature encoded signal onto a start segment or an end segment of the phase-cut dimming signal.

[0015] The present invention will now be described in more detail with reference to the drawings and specific embodiments. [Brief explanation of the drawings]

[0016] [Figure 1]1 is a principle block diagram of a dimming and color temperature adjustment control device according to a first embodiment of the present invention. [Figure 2] FIG. 10 is a principle block diagram of a dimming and color temperature adjustment control device according to a second embodiment of the present invention. [Figure 3] 1 is a principle block diagram of a light source with adjustable brightness and color temperature according to an embodiment of the present invention; [Figure 4] 4 is a waveform diagram of a phase cut dimming signal according to an embodiment of the present invention. FIG. [Figure 5] 1 is a schematic diagram illustrating the configuration of a dimming and color temperature adjustment control device according to a first embodiment of the present invention. [Figure 6] 3 is a flowchart illustrating a control method for dimming and color temperature adjustment according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment of the present invention will be described in detail below. Referring to FIGS. 1, 2, and 5, the embodiment of the present invention provides a dimming and color temperature control device, which includes a zero-crossing detection circuit, a control circuit, a carrier phase cut circuit, a power supply circuit, a control panel 200, and a housing 100. The zero-crossing detection circuit, control circuit, carrier phase cut circuit, and power supply circuit are all mounted on a control circuit board 300 within the housing 100. The input terminals of the zero-crossing detection circuit and the carrier phase cut circuit are both connected to a commercial power supply, and the zero-crossing detection circuit is used to detect the position of a zero-crossing point of an AC voltage. The control circuit is used to calculate the length of a conduction period of a phase cut dimming signal based on the brightness adjustment amount, and calculates a chopping position based on the calculated length of the conduction period and the position of the zero-crossing point detected by the zero-crossing detection circuit. The control circuit also encodes the color temperature adjustment amount to generate a color temperature encoded signal. The carrier phase-cut circuit chops the half-wave of the input AC voltage based on the chopping position calculated by the control circuit to generate a phase-cut dimming signal corresponding to the conduction time length and brightness adjustment amount, and superimposes the color temperature encoded signal onto the phase-cut dimming signal. The input end of the power supply circuit is connected to the AC voltage and is used to supply power for the normal operation of the entire control device. The control panel 200 is provided with a color temperature operation module 220 and a brightness operation module 210, which are both connected to the control circuit and used to input the color temperature adjustment amount and brightness adjustment amount to the control circuit, respectively.

[0018] A dimming and color temperature control device according to an embodiment of the present invention dims a lighting fixture using a phase-cut dimming signal carrying a color temperature-encoded signal. The phase-cut dimming signal can be transmitted to the light source via an existing power line, eliminating the need for additional dimming lines and enabling adjustment of the brightness and color temperature of the lighting fixture. This is suitable for dimming retrofit of lighting circuits in older buildings. Furthermore, by carrying the brightness adjustment amount through the conduction period of the phase-cut dimming signal and simultaneously carrying the color temperature adjustment amount through the color temperature-encoded signal, brightness and color temperature can be adjusted simultaneously, resulting in a fast dimming response and an improved user experience. Furthermore, because the color temperature-encoded signal is typically a pulse with a short conduction time, the effect on the conduction period of the phase-cut dimming signal after carrying the color temperature-encoded signal is negligible. The brightness and color temperature dimming information carried by the phase-cut dimming signal is easily distinguishable and less likely to interfere with each other, enabling more stable and accurate adjustment of the lighting fixture's brightness and color temperature. Furthermore, the dimming and color temperature adjustment control device according to an embodiment of the present invention only needs to encode the color temperature adjustment amount, which makes the control simpler, reduces the number of encoding circuits, and reduces the costs of research, development, and implementation compared to existing dimming controllers that use power line carrier communication to encode both brightness and color temperature adjustment information.

[0019] It should be understood that the brightness control module 210 and the color temperature control module 220 can input the brightness adjustment amount and the color temperature adjustment amount using a potentiometer or an encoder. Referring to FIGS. 1 and 5 , in some embodiments, the control circuit board 300 also includes a brightness signal processing circuit and a color temperature signal processing circuit. The input terminal of the brightness signal processing circuit is connected to one end and the output terminal of the brightness control module 210, and the output terminal is electrically connected to the control circuit and is used to convert the brightness adjustment signal output from the brightness control module 210 into a brightness control voltage that can be received by the control circuit. The input terminal of the color temperature signal processing circuit is connected to one end and the output terminal of the color temperature control module 220, and the output terminal is electrically connected to the control circuit and is used to convert the color temperature adjustment signal output from the color temperature control module 220 into a color temperature control voltage that can be received by the control circuit. The control circuit obtains the brightness adjustment amount and the color temperature adjustment amount based on the voltage values ​​of the brightness control voltage and the color temperature control voltage. The brightness signal processing circuit and the color temperature signal processing circuit can generally use voltage conversion circuits such as amplifier circuits and voltage stabilization circuits, and the specific configurations are well known in the art, so detailed explanations thereof will be omitted here.

[0020] 2, it should be understood that the brightness control module 210 and the color temperature control module 220 may be a touch screen or a keypad control panel, and the brightness adjustment amount and the color temperature adjustment amount are input to the control circuit via the position of a scroll bar on the touch screen or the keypad control panel.

[0021] It should be understood that in some embodiments, the brightness adjustment amount and color temperature adjustment amount can be transmitted to the control circuit via wireless communication. Referring to FIG. 2 , in some embodiments, a wireless communication circuit is also provided on the control circuit board 300, and the output terminal of the wireless communication circuit is electrically connected to the control circuit. The wireless communication circuit can be a Bluetooth unit or a WiFi unit and its peripheral circuits, etc., and an APP can be installed on a smart terminal such as a mobile phone, and the mobile phone can be controlled via the APP to transmit the brightness adjustment amount and color temperature adjustment amount to the wireless communication circuit or directly transmit them via a WiFi signal to the WiFi unit, thereby achieving the transmission of dimming information.

[0022] In some embodiments, an external circuit is also provided on the control circuit board, and the output terminal of the external circuit is electrically connected to the control circuit. It should be understood that the external circuit can be used to adjust the minimum brightness level, the minimum phase width, the maximum phase width, and switching between leading edge phase cut and trailing edge phase cut modes. The external circuit can be a potentiometer, a dip switch, or an NFC circuit. When an NFC receiving circuit is used, an NFC sensing area must be provided on the control panel 200, and the receiving coil of the NFC receiving circuit must be located near the NFC sensing area on the control panel 200.

[0023] In some embodiments, a switch module 230 is also provided on the control panel 200, and the switch module 230 is used to control the operating state of the entire control device. It should be understood that a switch in the switch module 230 can be disposed between the commercial power supply and the input terminal of the control circuit board 300, and can control the power supply to the entire control device and turn the control device on or off by disconnecting or connecting the control circuit board 300 to the commercial power supply. Alternatively, the switch in the switch module 230 can be connected to the control circuit and / or the power circuit, and can directly or indirectly control the enable control signal of the power circuit, thereby switching the entire control device between a low-power standby mode and a normal operating mode. The switch module 230 can be a mechanical switch or a touch screen.

[0024] To simplify installation, in some embodiments, the input and output of the control circuit board 300 use a single firewire input and a single-wire output, respectively. That is, the inputs of the power supply circuit, the zero-crossing detection circuit, and the carrier phase cut circuit are all connected only to the firewire of the utility power supply, the output of the carrier phase cut circuit is connected to the firewire end of the input of the phase cut dimming power supply, and the neutral end of the input of the phase cut dimming power supply is connected to the neutral line of the utility power supply, thus forming a closed loop.

[0025] It should be understood that the control circuit generally includes a microcontroller and its peripheral circuits, and the microcontroller can generate corresponding color temperature and brightness modulation signals (the modulation signals are generally pulse signals) based on the input color temperature adjustment amount and brightness adjustment amount to control the switch of the carrier phase cut circuit. The specific configuration of the color temperature encoding modulation signal needs to be designed according to the encoding rule of the color temperature adjustment amount and the format of the modulation signal. The specific configurations of the above-mentioned circuit and zero-cross detection circuit are all common knowledge in this technical field, so detailed description thereof will be omitted here.

[0026] Referring to FIG. 3, a phase-cut dimming power supply used in conjunction with an embodiment of the present invention includes a sampling circuit, a dimming microcontroller, and a dimming circuit. The inputs of the sampling circuit and the dimming circuit are both connected to a phase-cut dimming signal output from a dimming and color temperature control device. The output of the sampling circuit is electrically connected to the dimming microcontroller, and the output of the dimming circuit is connected to a light source load. The dimming circuit is controlled by the dimming microcontroller. The sampling circuit samples and adjusts the input phase-cut dimming signal and sends it to the dimming microcontroller. The dimming microcontroller analyzes the sampling signal to obtain brightness and color temperature data. Based on the obtained brightness and color temperature data, the dimming circuit controls the energy output to multiple lamps with different color temperatures to adjust the color temperature and brightness. Referring to FIG. 3, the input of the dimming circuit is connected to the phase-cut dimming signal via a filter circuit. The filter circuit filters out electromagnetic interference signals in the phase-cut dimming signal, thereby making the operation of the dimming circuit more stable. It should be understood that a dimming circuit generally comprises a switching power supply and two or more output control circuits, each of which is connected to a lamp having a different color temperature, and the output control circuit adjusts the brightness ratio between two or more lamps with different color temperatures under the control of a dimming microcontroller, so that the mixed light emitted from the lamps with different color temperatures can exhibit different color temperatures.

[0027] Referring to FIG. 6, the dimming and color temperature control method according to an embodiment of the present invention includes: obtaining a brightness adjustment amount and a color temperature adjustment amount; encoding the color temperature adjustment amount into a color temperature encoded signal according to a preset encoding rule; calculating a chopping position based on the brightness adjustment amount and the position of a zero cross point of the commercial power supply; chopping the commercial power supply based on the chopping position to generate a phase-cut dimming signal; and The color temperature encoding signal is superimposed on the phase-cut dimming signal.

[0028] 4, in this embodiment, the color temperature-encoded signal is a square wave signal. When superimposed on the phase-cut dimming signal, the color temperature-encoded signal modulates the AC voltage, maintaining the original waveform of the AC voltage during the high-level section of the color temperature-encoded signal and chopping the waveform during the low-level section. The duration of each pulse of the color temperature-encoded segment in the phase-cut dimming signal can represent specific information, or the chopped portion can be symbol "1" and the unchopped portion can be symbol "0", conveying color temperature adjustment information as a binary string. To facilitate identification and decoding of the color temperature-encoded segment of the phase-cut dimming signal, each segment can be divided into a start mark segment, a data segment, an end mark segment, and a check bit segment. The start mark segment and the end mark segment can be pulses of a specific length or a specific number of symbols. The data segment and check bit segment are arranged in a certain order using the symbols "0" and "1" to form a binary encoding of the ASIC code value of the character, which can represent the color temperature adjustment amount and a check code calculated based on the color temperature adjustment amount. The check code is used to check the accuracy of the data segment, including the color temperature adjustment amount, according to specific checking rules to prevent inaccurate color temperature adjustment due to unexpected events such as misidentification or decoding errors. Information such as time and number can also be programmed into the data segment to support more complex color temperature adjustment control such as one-to-many. The specific encoding rules are designed by engineers according to actual needs, so they will not be described in detail here.

[0029] The phase-cut dimming method can use leading edge phase-cut dimming or trailing edge phase-cut dimming, and the color temperature encoding signal can be inserted and mounted at any position of the front, middle, or rear section of the phase-cut dimming signal as needed. Referring to Figure 4, in this embodiment, to facilitate identification of the color temperature encoding segment in the phase-cut dimming signal, the color temperature encoding signal should be mounted on the start segment or end segment of the phase-cut dimming signal generated based on the brightness dimming value, i.e., at the start or end position of each half-wave, or on both sides of the chopping position. Referring to FIG. 4, in the process of generating the phase-cut dimming signal, a chopping modulation signal a1 generated based on a previously calculated chopping position and a color temperature encoded modulation signal generated by encoding the color temperature adjustment amount are superimposed to generate a final modulation signal a2, and then the final modulation signal a2 is used to modulate the AC voltage to directly generate a final phase-cut dimming signal carrying the color temperature encoded signal. Alternatively, the AC voltage is first modulated with the chopping modulation signal a1 and the color temperature encoded modulation signal, respectively, and then the two modulation signals are superimposed on the result of the AC voltage modulation to generate a final phase-cut dimming signal carrying the color temperature encoded signal.

[0030] It should be understood that the color temperature encoded signal can be continuously superimposed on the phase-cut dimming signal to continuously transmit color temperature information to the lighting fixture, or it can be superimposed on the phase-cut dimming signal for only one cycle or a limited number of cycles each time the color temperature adjustment amount changes.

[0031] In describing the present invention, the orientations or positional relationships indicated by terms such as "upper," "lower," "front," "rear," "left," and "right" are based on the orientations or positional relationships shown in the drawings, and are merely for the purpose of making the present invention easier to explain. It should be noted that these terms do not necessarily indicate or suggest that the devices or components shown necessarily have a specific orientation or are configured and operated in a specific orientation, and therefore should not be understood as limitations on the present invention.

[0032] In describing the present invention, "some" means one or more, "plurality" means two or more, and greater than, less than, more, etc. are understood to be exclusive, and greater than, less than, within, etc. are understood to be inclusive. The terms "first", "second", etc. are used merely to distinguish technical features and should not be understood to indicate or suggest relative importance or to implicitly specify the number or sequential relationship of the indicated technical features.

[0033] Unless otherwise expressly limited, the terms "provided," "attached," and "connected" used in the present invention should be interpreted broadly, and a person skilled in the art can reasonably determine the specific meaning of the above terms in the present invention based on the specific content of the technical means.

[0034] Although the present invention has disclosed preferred embodiments as described above, these do not in any way limit the scope of protection of the present invention, and any non-essential changes and substitutions made by those skilled in the art based on the present invention are included in the scope of protection claimed by the present invention. [Explanation of symbols]

[0035] 100 cabinets 200 Control Panel 210 Brightness Control Module 220 Color Temperature Control Module 230 Switch Module 300 Control circuit board

Claims

1. A dimming and color temperature adjustment control device comprising a housing (100), a control panel (200), and a control circuit board (300); A control circuit board (300) is provided in the housing (100), and a zero-cross detection circuit, a control circuit, a carrier phase cut circuit, and a power supply circuit are provided on the control circuit board (300); the zero-cross detection circuit is used to detect the position of a zero-cross point of a commercial power supply; the control circuit is electrically connected to an output terminal of the zero-crossing detection circuit, and is used to calculate a chopping position according to a brightness adjustment amount and a position of the zero-crossing point, and to encode a color temperature adjustment amount to generate a color temperature encoded signal; the carrier phase cut circuit is electrically connected to an output terminal of the control circuit, and is used to chop the commercial power supply based on the chopping position to generate a phase cut dimming signal, and to transmit the color temperature encoded signal onto the phase cut dimming signal; the power supply circuit is used to supply power to the zero-cross detection circuit, the control circuit, and the carrier phase cut circuit; The control panel (200) is provided on the housing (100), and the control panel (200) is provided with an operation module (210) and a color temperature operation module (220); the operation module (210) is electrically connected to the control circuit and is used to input the brightness adjustment amount; The color temperature control module (220) is electrically connected to the control circuit and is used to input the color temperature adjustment amount. A dimming and color temperature adjustment control device.

2. 2. The dimming and color temperature control device of claim 1, wherein the control circuit board (300) further comprises a brightness signal processing circuit and a color temperature signal processing circuit, the operation module (210) is electrically connected to the control circuit through the brightness signal processing circuit, the color temperature operation module (220) is electrically connected to the control circuit through the color temperature signal processing circuit, the brightness signal processing circuit is used to receive the brightness adjustment signal output from the operation module (210), convert the brightness adjustment signal into a corresponding brightness control voltage, and output it to the control circuit, and the color temperature operation module (220) is used to receive the color temperature adjustment signal output from the color temperature operation module (220), convert the color temperature adjustment signal into a corresponding color temperature control voltage, and output it to the control circuit.

3. 2. The dimming and color temperature control device of claim 1, wherein the input end of the control circuit board (300) is a single Firewire input, which is connected to the Firewire of the commercial power supply, and the output end of the control circuit board (300) is a single-wire output, which is connected to one input end of a phase-cut dimming power supply, and the other input end of the phase-cut dimming power supply is connected to the neutral line of the commercial power supply to form a current loop.

4. 2. The dimming and color temperature control device of claim 1, wherein the operation module (210) and the color temperature operation module (220) can both be a potentiometer, a touch screen, an encoder, or a keypad control panel (200).

5. 2. The dimming and color temperature adjustment control device according to claim 1, wherein the control circuit board (300) is provided with an external circuit, the external circuit is electrically connected to the control circuit, and is used for setting the minimum brightness level adjustment and switching between leading edge phase cut and trailing edge phase cut, and the external circuit can be configured as a potentiometer, a DIP switch, or an NFC circuit.

6. 2. The dimming and color temperature adjustment control device according to claim 1, further comprising a wireless communication circuit electrically connected to said control circuit for wirelessly controlling said control circuit.

7. 2. The dimming and color temperature adjustment control device according to claim 1, wherein the carrier phase cut circuit places the color temperature encoded signal on a start segment or an end segment of the phase cut dimming signal.

8. 2. The dimming and color temperature control device according to claim 1, wherein the control panel (200) is further provided with a switch module (230), the switch of which is connected in series between a commercial power source and the control circuit board (300) to control the conduction and interruption between the commercial power source and the control circuit board (300), or the switch module (230) is electrically connected to the power circuit and / or the control circuit to put the dimming and color temperature control device into a standby state or a normal operating state.

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