Control System and Control Method for Adjusting Color Temperature of a Lighting Fixture

Abstract

The present invention relates to a control system and method for adjusting the color temperature of a lamp. Among them, the control system includes a main control module, a first lamp, a second lamp, a first sensing module, and a second sensing module. The first lamp is connected to the main control module through a first switch module, and the second lamp is connected to the main control module through a second switch module. The first sensing module is connected to the main control module and transmits sensing information to the main control module. The main control module controls the duty cycle of the first switch module according to the received sensing information to determine the brightness and color temperature of the first lamp. The second sensing module is connected to the main control module and transmits a sensing signal to the main control module. When the second lamp is sensed to be turned on by the sensing signal, the main control module controls the second switch module to output the same proportion of duty cycle as the first switch module to adjust the color temperature of the second lamp to be the same as that of the first lamp. This system and method achieve system coordination and unity and user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of lamps, and particularly to a control system and a control method for adjusting the color temperature of lamps. Background Art

[0002] Bathroom mirror cabinet lamps are becoming more and more common in home life. Currently, the common design is to set a set of controllers on the mirror for dimming and color adjustment of the lamps on the mirror, and a set of controllers is set inside the cabinet for controlling the lamp to turn on when the door is opened and turn off when the door is closed.

[0003] However, the current design cannot adjust the color temperature of the lamps inside the cabinet, which easily causes the color temperature of the lamps inside the cabinet to be inconsistent with that of the lamps on the mirror, affecting the customer experience. Summary of the Invention

[0004] In view of the above problems, the purpose of the present invention is to provide a control system and method for adjusting the color temperature of lamps, which can make the lamps inside the cabinet follow the lamps on the mirror for color temperature adjustment, so as to unify and coordinate the color temperature of the lamps inside the cabinet and the lamps on the mirror, and improve the user experience.

[0005] To achieve the above purpose, the technical solution of the present invention is: a control system for adjusting the color temperature of lamps, the control system includes a main control module, a first lamp, a second lamp, a first sensing module and a second sensing module. The first lamp is connected to the main control module through a first switch module, and the second lamp is connected to the main control module through a second switch module. Its characteristics are as follows:

[0006] The first sensing module is connected to the main control module and transmits sensing information to the main control module. The main control module controls the duty cycle of the first switch module according to the received sensing information to determine the brightness and color temperature of the first lamp;

[0007] The second sensing module is connected to the main control module and transmits a sensing signal to the main control module. When the second lamp is sensed to be turned on by the sensing signal, the main control module controls the second switch module to output the same proportion of duty cycle as the first switch module to adjust the color temperature of the second lamp to be the same as that of the first lamp.

[0008] Further, the first switch module includes a first MOS transistor and a second MOS transistor. The first lamp includes a first sub-lamp connected to the first MOS transistor and controlled by the first MOS transistor to turn on and off, and a second sub-lamp connected to the second MOS transistor and controlled by the second MOS transistor to turn on and off;

[0009] The first MOS transistor and the second MOS transistor are respectively connected to the first output port and the second output port of the main control module. The main control module adjusts the duty cycles of the first MOS transistor and the second MOS transistor according to the sensing information to control the brightness of the corresponding lamps and the color temperature of the first lamp.

[0010] Further, the second switch module includes a third MOS transistor and a fourth MOS transistor. The second lamp includes a third sub-lamp connected to the third MOS transistor and controlled by the third MOS transistor to turn on and off, and a fourth sub-lamp connected to the fourth MOS transistor and controlled by the fourth MOS transistor to turn on and off;

[0011] The third MOS transistor and the fourth MOS transistor are respectively and correspondingly connected to the third output port and the fourth output port of the main control module. When the induction signal senses that the second lamp is on, the main control module controls the output duty ratios of the third MOS transistor and the fourth MOS transistor according to the duty ratio ratio of the first MOS transistor and the second MOS transistor to adjust the color temperature of the second lamp.

[0012] Further, the first induction module includes a touch probe and a first control chip connected to the touch probe to detect the induction information of the touch probe and transmit it to the main control module. The induction information corresponds to the touch duration detected by the touch probe.

[0013] Further, the second induction module includes an infrared probe and a second control chip connected to the infrared probe and transmitting the induction signal sensed by the infrared probe to the main control module. The induction signal is whether the infrared probe receives an infrared signal or not.

[0014] Further, the brightness output duty ratio calculation formula of the first MOS transistor is PWM_Q3 = (LIGHT * CCT) / 64;

[0015] The brightness output duty ratio calculation formula of the second MOS transistor is PWM_Q4 = (LIGHT * (255 - CCT)) / 64, where LIGHT is a brightness parameter with a value range of 0 - 255, and CCT is a color temperature parameter with a value range of 0 - 255.

[0016] Further, the duty ratio of the third MOS transistor is PWM_Q6 = (255 * CCT) / 64, and the duty ratio of the fourth MOS transistor is PWM_Q7 = (255 * (255 - CCT)) / 64, where CCT is a color temperature parameter with a value range of 0 - 255.

[0017] A control method for adjusting the color temperature of a lamp, the method using the control system as described above, characterized in that: the control method includes,

[0018] S1. Receive the induction signal fed back by the second induction module, and judge whether the second lamp is on based on the induction signal. If so, execute S2; if not, execute S3;

[0019] S2. Determine the output duty ratios of the third MOS transistor and the fourth MOS transistor according to the ratio of the duty ratios of the first MOS transistor and the second MOS transistor in the first lighting state of the first lamp, so that the color temperature of the second lamp is synchronized with the color temperature of the first lamp;

[0020] S3. Control the third MOS transistor and the fourth MOS transistor to turn off.

[0021] Compared with the prior art, the advantages of the present invention are as follows:

[0022] Only one main controller is provided. By connecting the first switch module and the second switch module to the main control module respectively, and converting the brightness and color temperature into quantifiable and controllable duty ratios, when the main control module determines that the second lamp is lit, it controls the second switch module to output the same proportion of duty ratio according to the duty ratio of the first switch module, so that the second lamp can follow the first lamp to output the same color temperature, greatly improving the coordination and unity of the control system and enhancing the user experience. Description of the Drawings

[0023] Figure 1 It is the overall structural block diagram of the control system for adjusting the color temperature of the lamps in this application.

[0024] Figure 2 It is the circuit schematic diagram of the first sensing module in the control system for adjusting the color temperature of the lamps in this application.

[0025] Figure 3 It is the circuit schematic diagram of the second sensing module in the control system for adjusting the color temperature of the lamps in this application.

[0026] Figure 4 It is the circuit schematic diagram of the connection between the main control module and the switch module in the control system for adjusting the color temperature of the lamps in this application. Detailed Embodiment

[0027] The embodiments of the present invention are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0028] Figures 1 to 4 It is the structural schematic diagram of the preferred embodiment of the present invention. As described in the background art, this control system is mainly used in the mirror cabinet lamp system of the bathroom, but this does not mean that this system can only be used in this scenario. It can also be applied to other occasions, such as wardrobes, cabinets, etc. that require such color temperature control scenarios.

[0029] Because, in order to better demonstrate that the system can be used in a wider range of scenarios and fields, in this application, the mirror lamp and the cabinet interior lamp are replaced by the first lamp and the second lamp respectively, and other terms related to mirrors, mirror cabinets, etc. are also replaced by corresponding terms such as "first" and "second". However, these "first" and "second" are only terms selected for the need of description and do not represent the uniqueness of order or position. At the same time, for the convenience of description, the mirror lamp and the cabinet interior lamp will be mentioned at appropriate places later for illustration.

[0030] As shown in the figure, the control system includes a main control module 1, a first lamp 2, a second lamp 3, a first induction module 4, and a second induction module 5. The first lamp 2 is connected to the main control module 1 through a first switch module 6, and the second lamp 3 is connected to the main control module 1 through a second switch module 7.

[0031] Among them, the first induction module 4 is connected to the main control module 1 and transmits the induction information to the main control module 1. The main control module 1 controls the duty cycle of the first switch module 6 according to the received induction information to determine the brightness and color temperature of the first lamp 2; the second induction module 5 is connected to the main control module 1 and transmits the induction signal to the main control module 1. When the second induction module 5 senses that the second lamp 3 is turned on, the main control module 1 controls the second switch module 7 to output the same proportion of duty cycle as the first switch module 6 to adjust the color temperature of the second lamp 3 to be the same as that of the first lamp 2.

[0032] The brightness of the lamp can be adjusted by the size of the duty cycle output by the switch module, and the brightness determines the color temperature. In this way, the color temperature can be quantitatively regulated through the duty cycle. On this basis, by making the second switch module follow the first switch module to output the same proportion of duty cycle, the second lamp can be made to display the same color temperature as the first lamp, thus cleverly solving the problem that the color temperature of the cabinet interior lamp is inconsistent with that of the lamp on the mirror.

[0033] Specifically, the first switch module 6 includes a first MOS transistor Q3 and a second MOS transistor Q4. The first lamp 2 includes a first sub-lamp connected to the first MOS transistor Q3 and controlled by the first MOS transistor Q3 to turn on and off, and a second sub-lamp connected to the second MOS transistor Q4 and controlled by the second MOS transistor A4 to turn on and off (the first sub-lamp and the second sub-lamp are not shown in the figure).

[0034] The first MOS transistor Q3 and the second MOS transistor Q4 are respectively connected to the first output port 9 and the second output port 11 of the main control module 1. The main control module 1 regulates the duty cycles of the first MOS transistor Q3 and the second MOS transistor Q4 according to the induction information, and then controls the brightness of the corresponding lamp and the color temperature of the first lamp 2.

[0035] The second switch module 7 includes a third MOS transistor Q6 and a fourth MOS transistor Q7. The second lighting fixture 3 includes a third sub-lighting fixture connected to the third MOS transistor Q6 and controlled by the third MOS transistor Q6 to turn on and off, and a fourth sub-lighting fixture connected to the fourth MOS transistor Q7 and controlled by the fourth MOS transistor Q7 to turn on and off (the third sub-lighting fixture and the fourth sub-lighting fixture are not shown in the figure).

[0036] The third MOS transistor Q6 and the fourth MOS transistor Q7 are respectively and correspondingly connected to the third output port 7 and the fourth output port 5 of the main control module 1. When the main control module 1 senses that the second lighting fixture 3 is lit, it controls the output duty ratios of the third MOS transistor Q6 and the fourth MOS transistor Q7 according to the duty ratio ratio of the first MOS transistor Q3 and the second MOS transistor Q4 to adjust the color temperature of the second lighting fixture 3.

[0037] The brightness of the lighting fixture is determined by the sum of the brightnesses of each lighting fixture. The color temperature is obtained by comparing the duty ratios corresponding to the brightnesses of each lighting fixture. Taking the first lighting fixture as an example, the first lighting fixture 2 is composed of a first sub-lighting fixture and a second sub-lighting fixture. As described above, the brightness can be adjusted by controlling the duty ratio output by the switch module. Obviously, when the duty ratio is 100%, the lighting fixture is the brightest, and when the duty ratio is 0%, the lighting fixture is the weakest in brightness, that is, the lighting fixture is not lit.

[0038] Specifically for the first lighting fixture, when its brightness is the brightest, it corresponds to a 100% duty ratio, and when its brightness is the weakest, it corresponds to a 0% duty ratio. Converted to the first sub-lighting fixture and the second sub-lighting fixture, it corresponds to the range of the sum of the brightness duty ratios of the first sub-lighting fixture and the second sub-lighting fixture being 0%-100%.

[0039] For example, now the brightness of the first lighting fixture 2 is shown as a 50% duty ratio, corresponding to the duty ratio brightness of the first sub-lighting fixture and the second sub-lighting fixture being 25% respectively. Then the color temperature of the first lighting fixture at this time is determined by 25%:25% = 1:1. If the color temperature parameter CCT is used as the quantization object and its value range is 0-255, then the color temperature of 1:1 at this time means that the color temperature parameters corresponding to the first sub-lighting fixture and the second sub-lighting fixture are approximately equal to 127, 128 or 128, 127 respectively.

[0040] For the second lighting fixture, if it is to have the same color temperature, its color temperature parameter also needs to correspond to 127, 128 or 128, 127 for the third sub-lighting fixture and the fourth sub-lighting fixture respectively. When it is quantified by the duty ratio, it corresponds to the duty ratio of the switch modules corresponding to the two sub-lighting fixtures of the second lighting fixture being 1:1. Thus, the purpose of making the color temperature of the cabinet light follow the color temperature of the mirror light is easily achieved.

[0041] In this embodiment, the first sensing module 4 includes a touch probe S1 and a first control chip N1 connected to the touch probe S1. The sensed information corresponds to the touch duration detected by the touch probe, that is, the length of time that a finger presses on the touch key. For this application, the color temperature adjustment starts when the lamp changes from off to on, and it is required that the finger touch and press duration is relatively long, such as greater than 0.5S. Generally, when touching to turn on the lamp or turn off the lamp, the corresponding touch and press duration is not greater than 0.5S. When the lamp is already in the on state, long pressing the touch key (duration greater than 0.5S) corresponds to the adjustment of the brightness.

[0042] Specifically, the first control chip N1 will collect the touch information on the touch probe S1 and analyze and judge it. If it judges that there is touch information, it will output a low level to the main control module 1. After receiving this information, the main control module 1 will judge whether it is a long-time touch based on the duration of the low level. If so, it will judge the states of Q3 and Q4 by judging pins 11 and 9. When it is judged that Q3 and Q4 are in the conducting state at this time, it is considered that this long-time press is for brightness adjustment. If it is judged that Q3 and Q4 are in the off state at this time, it is judged that this long-time press is for color temperature adjustment, and then it will control Q3 and Q4 to conduct, making the first lamp turn on, and at the same time determine the duty cycle of Q3 and Q4 according to the press duration, so as to control the brightness and color temperature.

[0043] After the main control module receives the low-level information output by the first control chip N1, it judges whether it is a short-time touch based on the duration of the low level. If so, it will determine that Q3 and Q4 perform opposite-state operations according to the states of Q3 and Q4, so as to realize the operation of turning off or turning on the lamp. This is common technical knowledge well known to those skilled in the art and will not be elaborated in detail here.

[0044] The second sensing module 5 includes infrared probes N3A - N3B, N4A - N4B and a second control chip N2 connected to the infrared probes. Its sensing signal is whether the infrared probes receive infrared signals. For the convenience of description, only N3A - N3B will be described below, and the principle of N4A - N4B is the same.

[0045] When the cabinet door is not opened, after the infrared signal is emitted through the branch where N3A is located, it will be reflected inside the cabinet and then received by the infrared probe N3B. N3B conducts, Q3' conducts, and a high level is output. The receive pin of the second control chip N2 receives this high-level signal, and a high level is output from pin 7 to pin 4 of the main control module 1. After receiving this information, the main control module 1 analyzes and judges that the cabinet door is not opened, and controls Q6 and Q7 not to open, corresponding to the third sub-lamp and the fourth sub-lamp not being on.

[0046] When the cabinet door is in the open state, the infrared signal cannot be reflected because there is no obstruction from the cabinet door. The infrared probe N3B cannot receive the infrared signal, Q3' is not turned on, and the voltage of VCC is divided by R12, R13, and R11. Since R11 << the resistance values of R12 and R13, the voltage divided by R11 is extremely low, resulting in the receive pin connected to Q3' receiving a low-level signal, and a low level is output from pin 7 to pin 4 of the main control module 1. After receiving this information, the main control module 1 analyzes and determines that the cabinet door is open. At this time, the duty cycle ratios corresponding to the first sub-light and the second sub-light in the lit state are called, so that Q6 and Q7 are also turned on at such duty cycle ratios, thereby controlling the color temperature of the second light and outputting the brightness of the current color temperature. For details, please refer to Figure 3 and Figure 4 .

[0047] Of course, the level output to the main control chip when the cabinet door is open can also be a low level, while the level output to the main control chip when the cabinet door is not open is a high level. This can be determined by those skilled in the art according to actual needs and will not be elaborated here.

[0048] Corresponding to this control, in this application, the brightness output duty cycle calculation formula for the first MOS transistor is PWM_Q3 = (LIGHT * CCT) / 64, the brightness output duty cycle calculation formula for the second MOS transistor is PWM_Q4 = (LIGHT * (255 - CCT)) / 64, the duty cycle of the third MOS transistor is PWM_Q6 = (255 * CCT) / 64, and the duty cycle of the fourth MOS transistor is PWM_Q7 = (255 * (255 - CCT)) / 64. Among them, LIGHT is the brightness parameter with a value range of 0 - 255, and CCT is the color temperature parameter with a value range of 0 - 255.

[0049] Thus, by setting the first switch module and the second switch module to be connected to the main control module, converting brightness and color temperature into quantifiable and controllable duty cycles, when the main control module determines that the second light is on, it controls the second switch module to output the same proportion of duty cycle according to the duty cycle of the first switch module, so that the second light follows the first light to output the same color temperature, greatly improving the coordination and unity of the control system and enhancing the user experience.

[0050] Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions, and deformations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A control system for adjusting the color temperature of a lamp, the control system comprising a main control module (1), a first lamp (2), a second lamp (3), a first sensing module (4), and a second sensing module (5), wherein the first lamp (2) is connected to the main control module (1) through a first switch module (6), and the second lamp (3) is connected to the main control module (1) through a second switch module (7), and is characterized in that: The first sensing module (4) is connected to the main control module (1) and transmits sensing information to the main control module (1), and the main control module (1) controls the duty cycle of the first switch module (6) according to the received sensing information to determine the brightness and color temperature of the first lamp (2); The second sensing module (7) is connected to the main control module (1) and transmits a sensing signal to the main control module (1). When the sensing signal senses that the second lamp (3) is turned on, the main control module (1) controls the second switch module (7) to output the same proportion of duty cycle as the first switch module (6) to adjust the color temperature of the second lamp (3) to be the same as that of the first lamp; wherein: The first switch module (6) includes a first MOS transistor (Q3) and a second MOS transistor (Q4). The first lamp (2) includes a first sub-lamp connected to the first MOS transistor (Q3) and controlled by the first MOS transistor (Q3) to turn on and off, and a second sub-lamp connected to the second MOS transistor (Q4) and controlled by the second MOS transistor (Q4) to turn on and off. The first MOS transistor (Q3) and the second MOS transistor (Q4) are respectively connected to the first output port and the second output port of the main control module (1). The main control module (1) adjusts the duty cycles of the first MOS transistor (Q3) and the second MOS transistor (Q4) according to the sensing information to control the brightness of the corresponding lamp and the color temperature of the first lamp (2); The second switch module (3) includes a third MOS transistor (Q6) and a fourth MOS transistor (Q7). The second lamp (3) includes a third sub-lamp connected to the third MOS transistor (Q6) and controlled by the third MOS transistor (Q6) to turn on and off, and a fourth sub-lamp connected to the fourth MOS transistor (Q7) and controlled by the fourth MOS transistor (Q7) to turn on and off. The third MOS transistor (Q6) and the fourth MOS transistor (Q7) are respectively connected to the third output port and the fourth output port of the main control module (1). When the sensing signal senses that the second lamp (3) is lit, the main control module (1) controls the output duty cycles of the third MOS transistor (Q6) and the fourth MOS transistor (Q7) according to the ratio of the duty cycles of the first MOS transistor (Q3) and the second MOS transistor (Q4) to adjust the color temperature of the second lamp (3); The brightness output duty cycle calculation formula of the first MOS transistor is PWM_Q3 = (LIGHT * CCT) / 64; the brightness output duty cycle calculation formula of the second MOS transistor is PWM_Q4 = (LIGHT * (255 - CCT)) / 64, where LIGHT is a brightness parameter with a value range of 0 - 255, and CCT is a color temperature parameter with a value range of 0 - 255; The duty cycle of the third MOS transistor is PWM_Q6 = (255 * CCT) / 64, and the duty cycle of the fourth MOS transistor is PWM_Q7 = (255 * (255 - CCT)) / 64, where CCT is the color temperature parameter with a value range of 0 - 255.

2. The control system for adjustable lamp color temperature according to claim 1, wherein: The first sensing module (6) includes a touch probe (S1) and a first control chip (N1) connected to the touch probe (S1) to detect the sensing information of the touch probe and transmit it to the main control module (1), and the sensing information corresponds to the touch duration detected by the touch probe (S1).

3. The control system for adjustable lamp color temperature according to claim 1, wherein: The second sensing module (7) includes an infrared probe and a second control chip (N2) connected to the infrared probe and transmitting the sensing signal sensed by the infrared probe to the main control module, and the sensing signal is whether the infrared probe receives an infrared signal or not.

4. A control method for adjusting the color temperature of a lamp, the method using the control system as described in claim 1, characterized in that: The control method includes, S1. Receive the sensing signal fed back by the second sensing module, and determine whether the second lamp is lit based on the sensing signal. If so, execute S2; if not, execute S3; S2. Determine the output duty cycles of the third MOS transistor and the fourth MOS transistor according to the duty cycle ratio of the first MOS transistor and the second MOS transistor in the state where the first lamp is lit, so as to synchronize the color temperature of the second lamp with that of the first lamp; S3. Control the third MOS transistor and the fourth MOS transistor to turn off.

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