System for realizing phase-cut dimming and color temperature adjustment of lamp

Abstract

The invention relates to a system for realizing phase-cut dimming and color temperature adjustment of a lamp, which comprises a phase-cut dimmer and a plurality of phase dimming lamps, the phase-cut dimmer is connected with an input AC power supply, the output end of the phase-cut dimmer is connected with the input ends of the plurality of phase dimming lamps, the phase-cut dimmer switches on and off the AC power supply and cuts the phase of the AC power supply and outputs the AC power supply to a driver, and the driver is connected with the plurality of phase dimming lamps. The power supply serves as an input power supply of the driver. By adopting the system for realizing phase-cut dimming and color temperature adjustment of the lamp, dimming by using a third-party front-cut or back-cut dimmer is realized, and dimming of the third-party driven lamp with a phase-cut dimming function is realized by using the phase-cut dimmer. Therefore, the dimming compatibility is realized. When the phase-cut dimmer is matched with a driver to work, the color temperature adjusting effect can be smoothly achieved under the condition that the brightness is kept. And light and color temperature can be adjusted at the same time. When the driver uses a third-party phase-cut dimmer, switching of several color temperatures can be realized through a mode of manually switching on and off the dimmer.

Description

Technical Field

[0001] The present invention relates to the field of lamps, in particular to the field of LED driving, and specifically refers to a system for realizing phase-cut dimming and color temperature adjustment of lamps. Background Art

[0002] At present, the AC phase-cut technology of most lamps can only achieve dimming, but not color temperature adjustment. The method of switching color temperature with a simple switch cannot achieve smooth transition of light, and the number of color temperatures that can be switched is relatively limited. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a system for realizing phase-cut dimming and color temperature adjustment of lamps which is easy to operate, has good dimming compatibility and a wide range of applications.

[0004] In order to achieve the above-mentioned object, the system for implementing phase-cut dimming and color temperature adjustment of a lamp of the present invention is as follows: The system for implementing phase-cut dimming and color temperature adjustment in lamps has the following main features: the system includes a phase-cut dimmer and one or more phase dimming lamps; the phase-cut dimmer is connected to an input AC power supply; the output end of the phase-cut dimmer is connected to the input ends of multiple phase dimming lamps; the phase-cut dimmer switches and phase-cuts the AC power supply and outputs it to the driver of the lamp as the input power supply of the driver; the phase-cut dimmer outputs a dimming signal by adjusting the conduction phase angle ratio of the AC power supply; the phase dimming lamp detects the conduction angle ratio of the input AC power supply, calculates the average of the most recent multiple half-wave conduction ratios, and then adjusts the output current or power ratio.

[0005] Preferably, each of the phase dimming lamps comprises an input voltage detection circuit and a driver, the input end of the input voltage detection circuit is connected to the output end of the phase dimmer, and the output end of the input voltage detection circuit is connected to the driver.

[0006] Preferably, the phase-cut dimmer outputs a first color temperature adjustment signal by adjusting different conduction ratios of multiple adjacent AC half-waves; the driver of the phase dimming lamp is used to detect the difference in conduction ratios of multiple adjacent half-waves of the input AC power supply; in the process of changing the color temperature, if no change in the conduction ratio mean is detected, the brightness is kept unchanged; if a change in the conduction ratio mean is detected, the brightness is adjusted according to the change value.

[0007] Preferably, the phase-cut dimmer outputs the first color temperature adjustment signal by adjusting different conduction ratios of multiple adjacent AC half-waves, specifically including: obvious high and low alternating conduction ratio changes of two adjacent half-waves, obvious sequential increasing conduction ratio changes of three adjacent half-waves, obvious sequential decreasing conduction ratio changes of three adjacent half-waves, and a smooth waveform.

[0008] Preferably, the phase-cut dimmer outputs a first color temperature adjustment signal by adjusting different conduction ratios of a plurality of adjacent AC half-waves, wherein the signal includes instructions for cold, warm, neutral switching and smooth gradient.

[0009] Preferably, the phase-cut dimmer outputs the first color temperature adjustment signal by adjusting different conduction ratios of a plurality of adjacent AC half-waves, and when transmitting a smooth gradient instruction, the amplitude of the waveform change includes smooth gradient speed information.

[0010] Preferably, when the dimming level of the phase-cut dimmer is in the off or dim state, the mean conduction ratio is temporarily increased when the color temperature adjustment signal is sent; when the dimming level of the phase-cut dimmer is at or close to 100%, the mean conduction ratio is temporarily reduced when the color temperature adjustment signal is sent.

[0011] Preferably, the phase-cut dimmer outputs the second color temperature switching signal by switching the AC power supply, and the driver of the phase dimming lamp realizes the simple color temperature mode switching by detecting the AC switching signal within a certain time range.

[0012] Preferably, the driver enters a predetermined color temperature state after continuously detecting the AC switch signal for a predetermined number of times.

[0013] Preferably, the driver of the phase dimming lamp outputs zero when the average conduction ratio is lower than a preset minimum ratio value, and outputs 100% when the average conduction ratio is higher than a preset maximum ratio value.

[0014] Preferably, when the conduction ratio mean value of the phase dimming lamp is greater than the minimum ratio value and less than the maximum ratio value, the driver of the phase dimming lamp adjusts the output current or power ratio according to the minimum brightness ratio through a quasi-linear, quasi-exponential or quasi-logarithmic dimming curve.

[0015] Preferably, the driver comprises a storage module for storing the value after each color temperature change.

[0016] The system for phase-cut dimming and color temperature adjustment of lamps of the present invention is adopted to realize the dimming of the third-party front-cut or rear-cut dimmer used by the driver, and the phase-cut dimmer is used to dim the third-party driven lamp with phase-cut dimming function. Therefore, it has dimming compatibility. When the phase-cut dimmer works with the driver, the color temperature adjustment effect can be smoothly achieved while maintaining the brightness. It is also possible to dim and adjust the color temperature at the same time. When the driver uses a third-party phase-cut dimmer, several color temperature switches can be achieved by manually turning the dimmer on and off. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1The figure is a hardware connection diagram of the system for implementing phase-cut dimming and color temperature adjustment for lamps of the present invention.

[0018] Figure 2 The diagram is a phase-cut waveform diagram of the system for implementing phase-cut dimming and color temperature adjustment in a lamp according to the present invention. Implementation

[0019] In order to more clearly describe the technical content of the present invention, further description is given below in conjunction with specific embodiments.

[0020] The system for implementing phase-cut dimming and color temperature adjustment of lamps of the present invention comprises a phase-cut dimmer and a plurality of phase dimming lamps, wherein the phase-cut dimmer is connected to an input AC power supply, and the output end of the phase-cut dimmer is connected to the input ends of the plurality of phase dimming lamps, and the phase-cut dimmer switches and phase-cuts the AC power supply and outputs it to a driver as the input power supply of the driver; the phase-cut dimmer outputs a dimming signal by adjusting the conduction phase angle ratio of the AC power supply, and the phase dimming lamp detects the conduction angle ratio of the input AC power supply, calculates the average of the most recent half-wave conduction ratios, and then adjusts the output current or power ratio.

[0021] As a preferred embodiment of the present invention, each of the phase dimming lamps includes an input voltage detection circuit and a driver, the input end of the input voltage detection circuit is connected to the output end of the phase dimmer, and the output end of the input voltage detection circuit is connected to the driver.

[0022] As a preferred embodiment of the present invention, the phase-cut dimmer outputs a first color temperature adjustment signal by adjusting different conduction ratios of multiple adjacent AC half-waves; the driver of the phase dimming lamp is used to detect the difference in conduction ratios of multiple adjacent half-waves of the input AC power supply; in the process of changing the color temperature, if no change in the mean conduction ratio is detected, the brightness is kept unchanged; if a change in the mean conduction ratio is detected, the brightness is adjusted according to the change value.

[0023] As a preferred embodiment of the present invention, the phase-cut dimmer outputs a first color temperature adjustment signal by adjusting different conduction ratios of multiple adjacent AC half-waves, specifically including: obvious high and low alternating conduction ratio changes of two adjacent half-waves, obvious sequential increasing conduction ratio changes of three adjacent half-waves, obvious sequential decreasing conduction ratio changes of three adjacent half-waves, and a smooth waveform.

[0024] As a preferred embodiment of the present invention, the phase-cut dimmer outputs a first color temperature adjustment signal by adjusting different conduction ratios of a plurality of adjacent AC half-waves, and the signal includes instructions for cold, warm, neutral switching and smooth gradient.

[0025] As a preferred embodiment of the present invention, the phase-cut dimmer outputs the first color temperature adjustment signal by adjusting different conduction ratios of multiple adjacent AC half-waves. When transmitting a smooth gradient instruction, the waveform change amplitude includes smooth gradient speed information.

[0026] As a preferred embodiment of the present invention, when the dimming level of the phase-cut dimmer is in the off or dim state, when the color temperature adjustment signal is sent, the mean conduction ratio is temporarily increased; when the dimming level of the phase-cut dimmer is in or close to 100%, when the color temperature adjustment signal is sent, the mean conduction ratio is temporarily reduced.

[0027] As a preferred embodiment of the present invention, the phase-cut dimmer outputs a second color temperature switching signal by switching the AC power supply, and the driver of the phase dimming lamp realizes simple color temperature mode switching by detecting the AC switching signal within a certain time range.

[0028] As a preferred embodiment of the present invention, the driver enters a predetermined color temperature state after continuously detecting the AC switch signal for a predetermined number of times.

[0029] As a preferred embodiment of the present invention, the driver of the phase dimming lamp outputs zero when the average conduction ratio is lower than a preset minimum ratio value, and outputs 100% when the average conduction ratio is higher than a preset maximum ratio value.

[0030] As a preferred embodiment of the present invention, when the conduction ratio mean of the phase dimming lamp driver is greater than the minimum ratio value and less than the maximum ratio value, a quasi-linear, quasi-exponential or quasi-logarithmic dimming curve can be applied, and a slight adjustment can be made according to the minimum brightness ratio.

[0031] As a preferred embodiment of the present invention, the driver includes a storage module for storing the value after each color temperature change.

[0032] In the present invention, the AC phase-cut technology can be used to simply and smoothly dim the light and adjust the color temperature of the lamp, and the dimming function is compatible with various phase-cut dimmers and phase-cut dimming drivers available on the market.

[0033] The present invention performs normal phase-cut dimming like ordinary thyristors. When adjusting the color temperature, the change of two or three adjacent waveforms is used to transmit the color temperature adjustment instruction. For example, alternating high and low ratios is a neutral color temperature, increasing the ratio of the three waveforms in sequence is a cold color temperature, and decreasing the ratio of the three waveforms in sequence is a warm color temperature. In the non-dimming state, the average value of the phase-cut ratio of these two or three waveforms is unchanged, and the switch is compatible with switching three color temperatures.

[0034] The phase-cut dimming and color temperature adjustment method for lamps of the present invention comprises a dimming system composed of a phase-cut dimmer and a lamp driver. The phase-cut dimmer is connected to an AC power input, and the output end of the phase-cut dimmer is connected to the input end of the lamp driver. The phase-cut dimmer can switch and phase-cut the AC power and output it to the driver as the input power of the driver. In some occasions, the phase-cut dimmer can also be called a controller, a dimming panel, etc. Figure 1 shown.

[0035] The phase-cut dimmer outputs a dimming signal by adjusting the AC conduction phase angle ratio. The lamp driver detects the conduction angle ratio of the input AC power supply and calculates the average of the recent multiple half-wave conduction ratios to adjust the output current or power ratio to achieve smooth dimming.

[0036] The phase-cut dimmer outputs the first color temperature adjustment signal by adjusting the significantly different conduction ratios of two or three adjacent AC half-waves. When not in the dimming state, the mean conduction ratio of these two or three half-waves remains unchanged. When dimming and color temperature are adjusted simultaneously, the difference in the different conduction ratios of the two or three adjacent AC half-waves is much larger than the dimming step value, so that the driver can reliably distinguish between dimming and color temperature adjustment signals. The driver of the lamp realizes the switching of color temperature to cold, warm, and intermediate colors, or gradually changes to cold, warm, or neutral color temperature by detecting the difference in the conduction ratio of two or three adjacent half-waves of the input AC power supply, and during or after the color temperature change, if the mean conduction ratio change is not detected, the brightness remains unchanged. If the mean conduction ratio change is detected, the brightness is adjusted according to the change value.

[0037] The phase-cut dimmer outputs a second color temperature switching signal by switching the AC power supply. The driver of the lamp realizes simple color temperature mode switching by detecting the AC switching signal within a certain time range, such as cyclically switching the output among the three color temperatures of cold, warm and neutral.

[0038] When the dimming level of the phase-cut dimmer is in the off or dim state (i.e., the mean conduction angle is close to or equal to 0%) and a color temperature adjustment signal is to be sent, the mean conduction ratio is temporarily increased to facilitate the sending of the color temperature adjustment signal.

[0039] When the dimming level of the phase-cut dimmer is at or close to 100% (i.e., the mean conduction angle is close to or equal to 100%) and a color temperature adjustment signal is to be sent, the mean conduction ratio is temporarily reduced to facilitate the sending of the color temperature adjustment signal.

[0040] The dimming output curve of the driver is that when the average conduction ratio is lower than a certain minimum ratio value, the output is zero, and when it is higher than a certain maximum ratio value, the output is 100%, so that when the lamp is turned off or in the brightest state, the phase-cut dimmer can still send a color temperature adjustment signal without affecting the brightness of the lamp.

[0041] When the average conduction ratio detected by the driver is greater than the minimum ratio value and less than the maximum ratio value, the following three dimming curves can be applied and slightly adjusted according to the lowest brightness ratio that the driver can support: Quasi-logarithmic dimming output curve (%): 10^((3*((mean conduction ratio - minimum conduction ratio)*100 / (maximum conduction ratio - minimum conduction ratio)-1) / 99)-1); Quasi-exponential dimming output curve (%): 100*((mean conduction ratio - minimum conduction ratio) / (maximum conduction ratio - minimum conduction ratio))^2; Quasi-linear dimming output curve (%): 100*(mean conduction ratio - minimum conduction ratio) / (maximum conduction ratio - minimum conduction ratio) After the driver detects the switch signal for a predetermined number of times continuously, it enters a predetermined color temperature state, such as neutral color, so that when a phase-cut dimmer (or switch) controls multiple lamps, the color temperature states of each lamp can be synchronized.

[0042] The driver has a storage function. The value after each color temperature change can be stored in a non-volatile memory such as flash or eeprom. Each time the driver is powered on, the previously saved color temperature value is automatically applied.

[0043] In a specific embodiment of the present invention, the dimming curve of the phase-cut dimming driver can be defined as: when the input AC waveform is lower than the 10% conduction ratio mean value, the output is off; when it is higher than the 90% conduction ratio mean value, the output is 100% brightness; when it is in the middle value, it is in the dimming state; the output ratio brightness can increase or decrease linearly with the conduction ratio mean value of the input AC waveform, and non-proportional increase methods such as logarithmic dimming curves and exponential dimming curves can also be applied.

[0044] An example rule for a phase-cut dimmer to output a first color temperature adjustment signal by adjusting significantly different conduction ratios of two or three adjacent AC half-waves can be defined as: (1) The obvious high-low alternating conduction ratio change between two adjacent half-waves can be defined as the intermediate color instruction; 10-15 pairs of continuous waveforms with such high-low alternating conduction ratios followed by 10-15 pairs of continuous stable waveforms are defined as switching to the intermediate color instruction; more than 15 pairs of continuous waveforms with such high-low alternating conduction ratios are defined as the step-by-step color temperature adjustment instruction approaching the intermediate color; (2) The change of the conduction ratio of three adjacent half-waves that increases in sequence can be defined as cold color correlation; 5-10 pairs of such continuous waveforms with increasing conduction ratios followed by 5-10 pairs of stable waveforms are defined as switching to cold color instructions; more than 10 pairs of such continuous waveforms with increasing conduction ratios are defined as stepping color temperature instructions towards cold colors; (3) The change of the conduction ratio of three adjacent half-waves that obviously decreases in sequence can be defined as warm color correlation; 5-10 pairs of such continuous waveforms with a sequentially decreasing conduction ratio followed by 5-10 pairs of stable waveforms are defined as switching to warm color instructions; more than 10 pairs of such continuous waveforms with a sequentially decreasing conduction ratio are defined as step-by-step color temperature adjustment instructions approaching warm colors; like Figure 2 A schematic diagram of the phase-cutting waveform of the front cutting is provided in the figure. Among them, a is the stable phase-cutting waveform of the phase-cutting dimmer, and the conduction ratio of each adjacent half-wave is roughly equal; b is the high-low alternating conduction ratio waveform of the two adjacent half-waves of the phase-cutting dimmer, and there are 3 pairs of such waveforms in the figure; c is the conduction ratio waveform of the three adjacent half-waves of the phase-cutting dimmer, high, medium and low are reduced in sequence, and there are 2 pairs of such waveforms in the figure; d is the conduction ratio waveform of the three adjacent half-waves of the phase-cutting dimmer, low, medium and high are increased in sequence, and there are 2 pairs of such waveforms in the figure. Note that this figure is a schematic diagram of the front cutting. For the phase-cutting method of the back cutting or the front and back cutting mixed, except for the different phase-cutting positions, the other principles are the same, and will not be described here.

[0045] An example rule for a phase-cut dimmer to output a second color temperature switching signal by switching the AC power supply can be defined as: Each switch action is effective for 0.2-2 seconds. After each effective switch action is detected by the driver, the cold, medium and warm colors are switched cyclically. After more than 3 consecutive switch actions, the color is switched to the neutral color.

[0046] In this embodiment, a commercially available third-party phase-cut dimmer can be used to dim the lamp equipped with the driver in this method, and the color temperature can also be switched by fast switching. When the phase-cut dimmer in this method is used in conjunction with the driver, the color temperature can be smoothly adjusted without affecting the dimming.

[0047] The specific implementation scheme of this embodiment can refer to the relevant description in the above embodiment, which will not be repeated here.

[0048] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0049] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0051] The system for phase-cut dimming and color temperature adjustment of lamps of the present invention is adopted to realize the dimming of the third-party front-cut or rear-cut dimmer used by the driver, and the phase-cut dimmer is used to dim the third-party driven lamp with phase-cut dimming function. Therefore, it has dimming compatibility. When the phase-cut dimmer works with the driver, the color temperature adjustment effect can be smoothly achieved while maintaining the brightness. It is also possible to dim and adjust the color temperature at the same time. When the driver uses a third-party phase-cut dimmer, several color temperature switches can be achieved by manually turning the dimmer on and off.

[0052] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it is apparent that various modifications and variations may be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be regarded as illustrative rather than restrictive.

Claims

1. A system for realizing phase-cut dimming and color temperature adjustment of lamps, It is characterized in that The system includes a phase-cut dimmer and one or more phase-dimming lamps. The phase-cut dimmer is connected to an input AC power supply, and the output end of the phase-cut dimmer is connected to the input end of one or more phase-dimming lamps. The phase-cut dimmer switches and cuts the phase of the AC power supply and outputs it to the driver of the lamp as the input power supply of the driver; the phase-cut dimmer outputs a dimming signal by adjusting the conduction phase angle ratio of the AC power supply, and the phase-dimming lamp detects the conduction angle ratio of the input AC power supply, calculates the average of the most recent half-wave conduction ratios, and then adjusts the output current or power ratio.

2. The system for implementing phase-cut dimming and color temperature adjustment for lamps according to claim 1, It is characterized in that Each of the phase dimming lamps comprises an input voltage detection circuit and a driver. The input end of the input voltage detection circuit is connected to the output end of the phase-cutting dimmer, and the output end of the input voltage detection circuit is connected to the driver.

3. The system for implementing phase-cut dimming and color temperature adjustment for lamps according to claim 1, It is characterized in that The phase-cut dimmer outputs a first color temperature adjustment signal by adjusting different conduction ratios of multiple adjacent AC half-waves; the driver of the phase dimming lamp is used to detect the difference in conduction ratios of multiple adjacent half-waves of the input AC power supply; in the process of changing the color temperature, if no change in the mean conduction ratio is detected, the brightness is kept unchanged; if a change in the mean conduction ratio is detected, the brightness is adjusted according to the change value.

4. The system for implementing phase-cut dimming and color temperature adjustment for lamps according to claim 3, It is characterized in that The phase-cut dimmer outputs the first color temperature adjustment signal by adjusting the different conduction ratios of multiple adjacent AC half-waves, specifically including: the conduction ratio changes of two adjacent half-waves are obviously alternating between high and low, the conduction ratio changes of three adjacent half-waves are obviously increasing in sequence, the conduction ratio changes of three adjacent half-waves are obviously decreasing in sequence, and a smooth waveform.

5. The system for implementing phase-cut dimming and color temperature adjustment for lamps according to claim 3, It is characterized in that The phase-cut dimmer outputs a first color temperature adjustment signal by adjusting different conduction ratios of a plurality of adjacent AC half-waves, and the signal includes instructions for cold, warm, neutral switching and smooth gradient.

6. The system for implementing phase-cut dimming and color temperature adjustment for lamps according to claim 3, 4 or 5, It is characterized in that The phase-cut dimmer outputs the first color temperature adjustment signal by adjusting different conduction ratios of a plurality of adjacent AC half-waves. When transmitting a smooth gradient instruction, the amplitude of the waveform change includes smooth gradient speed information.

7. The system for implementing phase-cut dimming and color temperature adjustment for lamps according to claim 3, It is characterized in that When the dimming level of the phase-cut dimmer is in the off or dim state, the mean conduction ratio is temporarily increased when the color temperature adjustment signal is sent; when the dimming level of the phase-cut dimmer is in or close to 100%, the mean conduction ratio is temporarily reduced when the color temperature adjustment signal is sent.

8. The system for implementing phase-cut dimming and color temperature adjustment for lamps according to claim 1, It is characterized in that The phase-cut dimmer outputs a second color temperature switching signal by switching the AC power supply, and the driver of the phase dimming lamp realizes simple color temperature mode switching by detecting the AC switching signal within a certain time range.

9. The system for implementing phase-cut dimming and color temperature adjustment for lamps according to claim 8, It is characterized in that The driver enters a predetermined color temperature state after continuously detecting the AC switch signal for a predetermined number of times.

10. The system for implementing phase-cut dimming and color temperature adjustment for lamps according to claim 1, It is characterized in that The driver of the phase dimming lamp outputs zero when the conduction ratio average value is lower than a preset minimum ratio value, and outputs 100% when it is higher than a preset maximum ratio value.

11. The system for implementing phase-cut dimming and color temperature adjustment for a lamp according to claim 1, It is characterized in that When the conduction ratio mean value of the phase dimming lamp driver is greater than the minimum ratio value and less than the maximum ratio value, the output current or power ratio is adjusted according to the minimum brightness ratio through a quasi-linear, quasi-exponential or quasi-logarithmic dimming curve.

12. The system for implementing phase-cut dimming and color temperature adjustment for a lamp according to claim 1, It is characterized in that The driver comprises a storage module for storing the value after each color temperature change.

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