Analog digital dimming circuit

Abstract

The utility model discloses an analog digital dimming circuit, which comprises a master control module, a digital receiving module, a digital transmitting module, an analog receiving module and a power parameter programming controller, the input end of the digital receiving module, the input end of the analog receiving module and the output end of the digital transmitting module are electrically connected with the power supply parameter programming controller respectively; the output end of the digital receiving module, the output end of the analog receiving module and the input end of the digital transmitting module are electrically connected with the main control module respectively; the power supply parameter programming controller reads current power supply parameters from the main control module through the digital sending module, the power supply parameter programming controller sends a power supply parameter modification instruction to the main control module through the digital receiving module, and the main control module controls modification of the power supply parameters. And the main control module controls output in combination with the analog signal and the modified power supply parameter.

Description

Technical Field

[0001] The utility model relates to the technical field of LED dimming circuits, in particular to an analog digital dimming circuit. Background Art

[0002] At present, a technology that uses analog signals to achieve dimming is popular in the market. Its advantages are simple circuits and relatively simple functions, so it is widely used in various fields. However, when some waterproof or airtight products need to modify some power supply parameters after leaving the factory, it is impossible to do so on traditional analog dimming products. There are also some methods on the market that achieve this by adding communication interfaces, but this method greatly increases the cost of the product and also brings a lot of inconvenience to customers. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide an analog-digital dimming circuit which shares an analog dimming interface and is compatible with digital communication.

[0004] According to the analog digital dimming circuit of the embodiment of the utility model, it includes a main control module, a digital receiving module, a digital sending module, an analog receiving module and a power parameter programming controller, the input end of the digital receiving module, the input end of the analog receiving module and the output end of the digital sending module are respectively electrically connected to the power parameter programming controller, the output end of the digital receiving module, the output end of the analog receiving module and the input end of the digital sending module are respectively electrically connected to the main control module; the power parameter programming controller reads the current power parameters from the main control module through the digital sending module, the power parameter programming controller sends a power parameter modification instruction to the main control module through the digital receiving module, the main control module controls the modification of the power parameters, the main control module receives an external analog signal through the analog receiving module, and controls the output in combination with the analog signal and the modified power parameters.

[0005] According to some embodiments of the utility model, it also includes an input resistor R1, one end of the input resistor R1 is electrically connected to the power parameter programming controller and inputs an external analog signal, and the other end of the input resistor R1 is respectively electrically connected to the input end of the digital receiving module, the input end of the analog receiving module and the output end of the digital sending module.

[0006] According to some embodiments of the present invention, the digital receiving module includes a resistor R2, one end of the resistor R2 is electrically connected to the other end of the input resistor R1, and the other end of the resistor R2 is electrically connected to the main control module.

[0007] According to some embodiments of the present invention, the digital sending module includes a switch tube Q1, a first end of the switch tube Q1 is electrically connected to the main control module, a second end of the switch tube Q1 is electrically connected to the other end of the input resistor R1, and a third end of the switch tube is grounded.

[0008] According to some embodiments of the present utility model, the analog receiving module includes a resistor R3 and a capacitor C1, one end of the resistor R3 is electrically connected to the other end of the input resistor R1, the other end of the resistor R3 is electrically connected to one end of the capacitor C1 and the main control module respectively, and the other end of the capacitor C1 is grounded.

[0009] According to some embodiments of the present utility model, the analog receiving circuit also includes a resistor R4 and a capacitor C2, one end of the resistor R4 is electrically connected to one end of the capacitor C1, the other end of the resistor R4 is electrically connected to one end of the capacitor C2 and the main control module respectively, and the other end of the capacitor C2 is grounded.

[0010] According to some embodiments of the present invention, the analog receiving circuit further includes a resistor R5 , and the resistor R5 is connected in parallel with the capacitor C1 .

[0011] According to some embodiments of the present invention, the analog receiving circuit further includes a diode D1 , a cathode of the diode D1 is electrically connected to one end of the resistor R3 , and an anode of the diode D1 is grounded.

[0012] According to the analog digital dimming circuit of the embodiment of the utility model, at least the following beneficial effects are achieved: since the input end of the digital receiving module, the input end of the analog receiving module and the output end of the digital sending module are electrically connected to the power parameter programming controller respectively, that is, the external analog signal and the digital signal input and output by the power parameter programming controller share an interface, the external analog signal is transmitted to the main control module through the analog receiving module, the power parameter programming controller reads the current power parameters on the main control module through the digital sending module, and then sends the power parameter modification instruction to the main control module through the digital receiving module, the main control module modifies the power parameters, and controls the output according to the modified power parameters and the received analog signal. Compared with the traditional analog dimming, there is no need to add a communication interface, the analog signal and the digital signal share an interface to set the power parameters, control the output of multiple dimming signals, and it is easier to meet the needs of customers, and the structure is simple, and there is no need to set up wireless devices such as wireless chips to transmit digital signals, saving costs.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings;

[0015] Figure 1 It is the structural block diagram of the analog digital dimming circuit;

[0016] Figure 2 It is a control flow chart of the analog digital dimming circuit. DETAILED DESCRIPTION

[0017] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0018] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0020] Reference Figure 1 and Figure 2 The utility model is an analog digital dimming circuit, comprising a main control module, a digital receiving module 10, a digital sending module 20, an analog receiving module 30 and a power parameter programming controller, wherein the input end of the digital receiving module 10, the input end of the analog receiving module 30 and the output end of the digital sending module 20 are respectively electrically connected to the power parameter programming controller, and the output end of the digital receiving module 10, the output end of the analog receiving module 30 and the input end of the digital sending module 20 are respectively electrically connected to the main control module; the power parameter programming controller reads the current power parameter from the main control module through the digital sending module 20, the power parameter programming controller sends a power parameter modification instruction to the main control module through the digital receiving module 10, the main control module controls the modification of the power parameter, the main control module receives an external analog signal through the analog receiving module 30, and controls the output in combination with the analog signal and the modified power parameter. The main control module can adopt an existing main control chip for LED dimming control.

[0021] Since the input end of the digital receiving module 10, the input end of the analog receiving module 30 and the output end of the digital sending module 20 are electrically connected to the power parameter programming controller respectively, the external analog signal and the digital signal input and output of the power parameter programming controller share one interface. Figure 2 , the external analog signal is transmitted to the main control module through the analog receiving module 30, the power parameter programming controller reads the current power parameters on the main control module through the digital sending module 20, and then sends the power parameter modification instruction to the main control module through the digital receiving module 10, the main control module modifies the power parameters, and controls the output according to the modified power parameters and the received analog signal. Compared with the traditional analog dimming, there is no need to add a communication interface, the analog signal and the digital signal share one interface to set the power parameters, control the output of multiple dimming signals, and it is easier to meet customer needs, and the structure is simple, and there is no need to set up wireless devices such as wireless chips to transmit digital signals, saving costs.

[0022] Furthermore, the signal input end of the entire circuit also includes an input resistor R1, one end of the input resistor R1 is electrically connected to the power parameter programming controller and inputs an external analog signal, and the other end of the input resistor R1 is respectively electrically connected to the input end of the digital receiving module 10, the input end of the analog receiving module 30 and the output end of the digital sending module 20, the external analog signal and the digital signal for modifying the power supply parameters share an interface and are respectively sent to the main control module through the input resistor R1.

[0023] Furthermore, the digital receiving module 10 includes a resistor R2, one end of which is electrically connected to the other end of the input resistor R1, and the other end of the resistor R2 is electrically connected to the main control module. The digital signal is sent to the main control module through the input resistor R1 and the resistor R2 in sequence. When the signal input pin (the input end of the input resistor R1) is pulled low, the digital signal pin is at a low level, and when the signal input pin (the input end of the input resistor R1) is pulled high, the digital signal pin is at a high level.

[0024] Furthermore, the digital sending module 20 includes a switch tube Q1, which can be a MOS tube. The gate of the MOS tube Q1 is electrically connected to the main control module, the drain of the MOS tube Q1 is electrically connected to the other end of the input resistor R1, and the source of the MOS tube Q1 is grounded. When the digital sending pin of the main control module is pulled high, the signal input pin (the input end of the input resistor R1) will be pulled low, and the power supply parameter programming controller reads the current power supply parameters; when the digital sending pin of the main control module is pulled low, the MOS tube Q1 is not turned on, the signal input pin (the input end of the input resistor R1) will return to a high level, and the power supply parameter programming controller does not output instructions for modifying the power supply parameters.

[0025] Furthermore, the analog receiving module 30 includes a resistor R3 and a capacitor C1, one end of the resistor R3 is electrically connected to the other end of the input resistor R1, the other end of the resistor R3 is electrically connected to one end of the capacitor C1 and the main control module respectively, the other end of the capacitor C1 is grounded, and the resistor R3 and the capacitor C1 form a low-pass filter circuit to perform low-pass filtering on the analog signal.

[0026] Furthermore, the analog receiving circuit also includes a resistor R4 and a capacitor C2, one end of the resistor R4 is electrically connected to one end of the capacitor C1, the other end of the resistor R4 is electrically connected to one end of the capacitor C2 and the main control module respectively, the other end of the capacitor C2 is grounded, and the resistor R4 and the capacitor C2 form another filtering circuit, which together with the above-mentioned low-pass filtering circuit forms a second-order filtering circuit for further filtering.

[0027] According to some embodiments of the present invention, the analog receiving circuit further includes a resistor R5, and the resistor R5 is connected in parallel with the capacitor C1 to further enhance the filtering effect.

[0028] According to some embodiments of the present invention, the analog receiving circuit further includes a diode D1 , the cathode of the diode D1 is electrically connected to one end of the resistor R3 , the anode of the diode D1 is grounded, and the diode D1 prevents reverse conduction.

[0029] It is easy for those skilled in the art to understand that the above preferred embodiments can be freely combined and superimposed without conflict.

[0030] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An analog digital dimming circuit, characterized in that: include: A main control module, a digital receiving module (10), a digital sending module (20), an analog receiving module (30) and a power parameter programming controller, wherein the input end of the digital receiving module (10), the input end of the analog receiving module (30) and the output end of the digital sending module (20) are respectively electrically connected to the power parameter programming controller, and the output end of the digital receiving module (10), the output end of the analog receiving module (30) and the input end of the digital sending module (20) are respectively electrically connected to the main control module; the power parameter programming controller reads the current power parameter from the main control module through the digital sending module (20), the power parameter programming controller sends a power parameter modification instruction to the main control module through the digital receiving module (10), the main control module controls the modification of the power parameter, and the main control module receives an external analog signal through the analog receiving module (30), and controls the output in combination with the analog signal and the modified power parameter.

2. The analog digital dimming circuit according to claim 1, characterized in that: It also includes an input resistor R1, one end of which is electrically connected to the power parameter programming controller and inputs an external analog signal, and the other end of the input resistor R1 is electrically connected to the input end of the digital receiving module (10), the input end of the analog receiving module (30) and the output end of the digital sending module (20).

3. The analog digital dimming circuit according to claim 2, characterized in that: The digital receiving module (10) comprises a resistor R2, one end of the resistor R2 is electrically connected to the other end of the input resistor R1, and the other end of the resistor R2 is electrically connected to the main control module.

4. The analog digital dimming circuit according to claim 2, characterized in that: The digital sending module (20) comprises a switch tube Q1, a first end of the switch tube Q1 is electrically connected to the main control module, a second end of the switch tube Q1 is electrically connected to the other end of the input resistor R1, and a third end of the switch tube is grounded.

5. The analog digital dimming circuit according to claim 2, characterized in that: The analog receiving module (30) comprises a resistor R3 and a capacitor C1, one end of the resistor R3 is electrically connected to the other end of the input resistor R1, the other end of the resistor R3 is electrically connected to one end of the capacitor C1 and the main control module respectively, and the other end of the capacitor C1 is grounded.

6. The analog digital dimming circuit according to claim 5, characterized in that: The analog receiving module also includes a resistor R4 and a capacitor C2, one end of the resistor R4 is electrically connected to one end of the capacitor C1, the other end of the resistor R4 is electrically connected to one end of the capacitor C2 and the main control module respectively, and the other end of the capacitor C2 is grounded.

7. The analog digital dimming circuit according to claim 6, characterized in that: The analog receiving module further includes a resistor R5, which is connected in parallel with the capacitor C1.

8. The analog digital dimming circuit according to claim 7, characterized in that: The analog receiving module further includes a diode D1 , a cathode of the diode D1 is electrically connected to one end of the resistor R3 , and an anode of the diode D1 is grounded.

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