Multi-gear color temperature control circuit based on voltage value control

Abstract

The utility model relates to the technical field of LED color temperature adjustment, in particular to a multi-gear color temperature control circuit based on voltage value control, which comprises a controller module, a gradient voltage generation module, a gear change-over switch and a plurality of switch tubes. A plurality of output ends of the controller module are electrically connected with the multiple paths of light sources in a one-to-one correspondence manner through the switching tubes, an input end of the controller module is electrically connected with an output end of the gradient voltage generation module, and a plurality of input ends of the gradient voltage generation module are electrically connected with a plurality of gears of the gear change-over switch in a one-to-one correspondence manner; the problems that an existing multi-gear color temperature control circuit is complex in structure and high in cost are solved.

Description

Technical Field

[0001] This utility model relates to the field of LED color temperature adjustment technology, and in particular to a multi-level color temperature control circuit based on voltage value control. Background Technology

[0002] Existing LED color temperature adjustment technologies mostly employ PWM (Pulse Width Modulation) or digital signal control to achieve multi-level color temperature switching. However, since color temperature level switching involves adjusting the duty cycle of PWM signals from multiple LEDs (such as a mix of cool and warm colors), using PWM signals as the color temperature level switching signal requires dedicated configuration of multiple PWM signal generation circuits, resulting in high control difficulty and complex control circuit structure. Using digital signals as the color temperature level switching signal necessitates the design of control logic circuits, which also increases circuit costs. Utility Model Content

[0003] To address the aforementioned shortcomings, the purpose of this invention is to propose a multi-level color temperature control circuit based on voltage value control, thereby solving the problems of complex circuit structure and high cost of current multi-level color temperature control circuits.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A multi-level color temperature control circuit based on voltage value control includes a controller module, a gradient voltage generation module, a level switching switch, and multiple switching transistors. The multiple output terminals of the controller module are electrically connected to multiple light sources one-to-one through the switching transistors. The input terminal of the controller module is electrically connected to the output terminal of the gradient voltage generation module. The multiple input terminals of the gradient voltage generation module are electrically connected to multiple levels of the level switching switch one-to-one.

[0006] Furthermore, the gradient voltage generation module includes multiple resistor voltage divider circuits; the voltage division values ​​of the multiple resistor voltage divider circuits are distributed in a gradient, the multiple resistor voltage divider circuits are connected together to form a resistor network, the multiple resistor voltage divider circuits are respectively used as multiple input terminals of the gradient voltage generation module, and the common connection point of the multiple resistor voltage divider circuits is used as the output terminal of the gradient voltage generation module.

[0007] Furthermore, the gradient voltage generation module includes a resistor R3, a capacitor C2, and multiple resistors RS; the resistance values ​​of the multiple resistors RS are distributed in a gradient, one end of each resistor RS is used as the input terminal of the gradient voltage generation module, the other end of each resistor RS and one end of each capacitor C3 are electrically connected to one end of each resistor R3, the other end of each resistor R3 is connected to the power supply voltage, the other end of each capacitor C3 is grounded, and one end of each resistor R3 is used as the output terminal of the gradient voltage generation module.

[0008] Furthermore, all resistors RS are detachably electrically connected to the circuit board.

[0009] Furthermore, the gear shift switch is a DIP switch.

[0010] Furthermore, the controller module uses an MCU chip.

[0011] Furthermore, the switching transistor is a MOSFET.

[0012] The technical solution provided by this utility model can include the following beneficial effects: by combining the gradient voltage generation module with the gear switching switch, the voltage value is directly mapped to the preset PWM signal set, eliminating the need for the design of traditional multi-channel PWM generation circuits or complex logic circuits, and significantly simplifying the hardware architecture; more importantly, the voltage value formation method in the gradient voltage generation module is convenient and can be achieved through the simple application of various components, such as selectively charging different capacitors to form different voltage values, or selecting resistors with different resistance values ​​to divide the voltage to form different voltage values, etc., with a cost of only 1 / 3 of the conventional solution, and supporting modular expansion to be compatible with different gear number requirements. Attached Figure Description

[0013] Figure 1 This is a circuit diagram of a multi-level color temperature control circuit based on voltage value control, which is one embodiment of this utility model.

[0014] The components include: controller module 1, gradient voltage generation module 2, gear shift switch 3, switching transistor 4, resistor R3, capacitor C2, and resistor RS. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of embodiments of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0017] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0018] The following is combined Figure 1 This describes a multi-level color temperature control circuit based on voltage value control according to an embodiment of the present invention.

[0019] A multi-level color temperature control circuit based on voltage value control includes a controller module 1, a gradient voltage generation module 2, a level switching switch 3, and multiple switching transistors 4. The multiple output terminals of the controller module 1 are electrically connected to multiple light sources one-to-one through the switching transistors 4. The input terminal of the controller module 1 is electrically connected to the output terminal of the gradient voltage generation module 2. The multiple input terminals of the gradient voltage generation module 2 are electrically connected to multiple levels of the level switching switch 3 one-to-one.

[0020] This utility model proposes a preferred embodiment of a multi-level color temperature control circuit based on voltage value control, such as... Figure 1 As shown, the gradient voltage generation module 2 can generate different voltage values ​​in a gradient manner. When the gear switching switch 3 switches to different gears, the gradient voltage generation module 2 will generate different voltage values ​​accordingly, which will be received by the controller module 1. The controller module 1 will then distribute the pre-programmed PWM signal set contained in the gear to the switching transistor 4 of the multi-source light source, so that the multi-source light source switches can cooperate to form the color temperature effect of the gear.

[0021] In summary, by combining the gradient voltage generation module 2 with the gear shift switch 3, the voltage value is directly mapped to the preset PWM signal set, eliminating the need for traditional multi-channel PWM generation circuits or complex logic circuits, significantly simplifying the hardware architecture. More importantly, the voltage value formation method in the gradient voltage generation module 2 is convenient and can be achieved through the simple application of various components. For example, different voltage values ​​can be formed by selectively charging different capacitors, or by selecting resistors with different resistance values ​​to divide the voltage and form different voltage values. The cost is only 1 / 3 of the conventional solution, and it supports modular expansion to meet different gear number requirements.

[0022] Furthermore, the gradient voltage generation module 2 includes multiple resistor voltage divider circuits; the voltage division values ​​of the multiple resistor voltage divider circuits are distributed in a gradient, the multiple resistor voltage divider circuits are connected together to form a resistor network, the multiple resistor voltage divider circuits are respectively used as multiple input terminals of the gradient voltage generation module 2, and the common connection point of the multiple resistor voltage divider circuits is used as the output terminal of the gradient voltage generation module 2.

[0023] In this embodiment, multiple resistor voltage divider circuits are connected in a common structure to form a resistor network with a gradient voltage. The gear switch 3 selects the resistor voltage divider circuit by gear selection, and the corresponding voltage value can be obtained by voltage division. The voltage stability and response speed are better than the capacitor charging scheme, and the voltage divider resistor value can be accurately calculated and matched.

[0024] Furthermore, the gradient voltage generation module 2 includes a resistor R3, a capacitor C2, and multiple resistors RS; the resistance values ​​of the multiple resistors RS are distributed in a gradient. One end of each resistor RS is used as the input terminal of the gradient voltage generation module 2. The other end of the resistor RS and one end of the capacitor C3 are electrically connected to one end of the resistor R3. The other end of the resistor R3 is connected to the power supply voltage, the other end of the capacitor C3 is grounded, and one end of the resistor R3 is used as the output terminal of the gradient voltage generation module 2.

[0025] In this embodiment, the gradient voltage generation module 2 preferably uses a resistor RS with gradient resistance value and a resistor R3 to form a voltage divider ratio multiplexing structure (i.e., all resistor voltage divider circuits share resistor R3). A single resistor network can support multiple voltage outputs at the same time. Compared with discrete resistor voltage divider circuits, it reduces nearly half of the resistor components, making the circuit structure simpler and the cost lower. At the same time, the introduction of capacitor C2 can effectively suppress voltage glitches during switching.

[0026] Furthermore, the resistors RS are detachably electrically connected to the circuit board.

[0027] In this embodiment, in the circuit board of the multi-level color temperature control circuit, the resistors RS are all detachably electrically connected to the circuit board, such as by plugging in, so that when the voltage value needs to be changed later, it can be achieved by replacing the resistors RS with different resistance values, which is more convenient.

[0028] Furthermore, the gear shift switch 3 adopts a DIP switch.

[0029] In this embodiment, color temperature control can usually only select one level. Therefore, the level switching switch 3 preferably adopts a DIP switch connected to a resistor network, and the level is selected by switching different resistor voltage divider circuits.

[0030] Furthermore, controller module 1 uses an MCU chip.

[0031] In this embodiment, the controller module 1 preferably adopts an MCU chip, which can preset the PWM signal set for each color temperature level through simple programming and limit the voltage value corresponding to each color temperature level; and the MCU chip also has a number of editable I / O ports, which can be freely allocated as input terminals for voltage values ​​and output terminals for PWM signals.

[0032] Furthermore, switch 4 is a MOSFET.

[0033] In this embodiment, since a single light source may consist of multiple LEDs connected in series and the current is relatively large, the switching transistor 4 is preferably a MOSFET, which can control the on / off state of a single light source with a large current.

[0034] Other components and operations of the multi-level color temperature control circuit based on voltage value control according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0035] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-level color temperature control circuit based on voltage value control, characterized in that: It includes a controller module, a gradient voltage generation module, a gear shift switch, and multiple switching transistors; the multiple output terminals of the controller module are electrically connected to multiple light sources one-to-one through the switching transistors, the input terminal of the controller module is electrically connected to the output terminal of the gradient voltage generation module, and the multiple input terminals of the gradient voltage generation module are electrically connected to the multiple gears of the gear shift switch one-to-one.

2. The multi-level color temperature control circuit based on voltage value control according to claim 1, characterized in that: The gradient voltage generation module includes multiple resistor voltage divider circuits; the voltage division values ​​of the multiple resistor voltage divider circuits are distributed in a gradient, the multiple resistor voltage divider circuits are connected together to form a resistor network, the multiple resistor voltage divider circuits are respectively used as multiple input terminals of the gradient voltage generation module, and the common connection point of the multiple resistor voltage divider circuits is used as the output terminal of the gradient voltage generation module.

3. The multi-level color temperature control circuit based on voltage value control according to claim 1, characterized in that: The gradient voltage generation module includes a resistor R3, a capacitor C2, and multiple resistors RS. The resistance values ​​of the multiple resistors RS are distributed in a gradient. One end of each resistor RS is used as the input terminal of the gradient voltage generation module. The other end of each resistor RS and one end of each capacitor C3 are electrically connected to one end of each resistor R3. The other end of each resistor R3 is connected to the power supply voltage, and the other end of each capacitor C3 is grounded. One end of each resistor R3 is used as the output terminal of the gradient voltage generation module.

4. The multi-level color temperature control circuit based on voltage value control according to claim 3, characterized in that: The resistors RS are all detachably electrically connected to the circuit board.

5. The multi-level color temperature control circuit based on voltage value control according to claim 1, characterized in that: The gear shift switch is a DIP switch.

6. The multi-level color temperature control circuit based on voltage value control according to claim 1, characterized in that: The controller module uses an MCU chip.

7. The multi-level color temperature control circuit based on voltage value control according to claim 1, characterized in that: The switching transistor is a MOSFET.

Images