Multi-channel switching dimming control circuit

Abstract

The utility model discloses a kind of multi-channel switching dimming control circuit, including working mode switching circuit and switch and dimming circuit, the working mode switching circuit utilizes the voltage conversion of multiple DC-DC conversion IC to external power supply into different drive voltage drive multipath lighting system, the switch and dimming circuit utilize DC-DC conversion IC and potentiometer output adjustable drive voltage output to multipath lighting system;The utility model is standardized by modularization and design, using least several circuits realizes the integration and application of multiple lamps, various functions, greatly simplifies lighting control equipment, improves equipment reliability, security and man-machine efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to lighting system technical field, especially a kind of multi-channel switching dimming control circuit. BACKGROUND

[0002] With the continuous expansion of the application field of LED lamps, the demand for dimming and color-changing LED lamps is increasing. Especially in some special places, there are various dimming lamp products, which have strict integration requirements for the functions of control equipment. For example, in a certain aircraft platform, the controller provides switching, driving and dimming control for the lighting devices and light guide plates in the cabin lighting system. In other application fields such as ships and submarines, similar integration requirements also exist.

[0003] Now, for airborne lighting systems, they are divided into multiple independent subsystems according to their functions and purposes, each with its own control equipment. Each independent subsystem is designed and manufactured by different manufacturers, and its installation interface, electrical interface and human-machine interface are all different, and the dimming control methods are also different, which brings great challenges to the design of airborne platforms and the use of lighting systems. The traditional controller is a lighting subsystem controller for similar airborne platforms, which is only applicable to overhead lighting systems and cannot control signal lights, operating table lighting lamps, instrument panel light guide plate lighting and other regional lighting systems for other purposes. INVENTION CONTENTS

[0004] To solve the problems existing in the prior art, the purpose of the present utility model is to provide a multi-channel switching dimming control circuit. The present utility model uses modular and standardized design, and uses the least number of circuits to realize the integration and application of multiple lamps and multiple functions, greatly simplifying the lighting control equipment and improving the reliability, security and human-machine efficiency of the equipment.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a multi-channel switching dimming control circuit, which includes a working mode switching circuit and a switching and dimming circuit. The working mode switching circuit uses multiple DC-DC conversion ICs to convert the voltage of an external power supply into different driving voltages to drive multiple lighting systems. The switching and dimming circuit uses DC-DC conversion ICs and potentiometers to output adjustable driving voltages to the multiple lighting systems.

[0006] As a further improvement of the utility model, the working mode switching circuit includes DC-DC conversion IC U1, DC-DC conversion IC U2, the external power supply is connected with the input end of DC-DC conversion IC U1 and DC-DC conversion IC U2 respectively through relay K1, and the output end of DC-DC conversion IC U1 and DC-DC conversion IC U2 is connected to switch MOS tube Q11, and the switch MOS tube Q11 is connected with normally closed switch S1, and the normally closed switch S1 is used to control the conduction or shutdown of switch MOS tube Q11.

[0007] As a further improvement of the utility model, the switch and light modulation circuit includes DC-DC conversion IC U3, the external power supply is connected with the input end of relay K2 and DC-DC conversion IC U3 respectively through switch S1, the relay K2 is used to directly output the external power supply, and is connected with the output end of the working mode switching circuit through switch MOS tube Q21, and the output end of DC-DC conversion IC U3 is provided with potentiometer RX31A between the regulating end, and the resistance value of potentiometer RX31A is adjusted, and the voltage signal output by DC-DC conversion IC U3 is controlled.

[0008] As a further improvement of the utility model, the utility model further includes driving voltage conversion circuit, the driving voltage conversion circuit includes PWM signal generation IC U4, the external power supply is connected with the power supply end of relay K4 and PWM signal generation IC U4 respectively through switch S4, the output end of relay K4 and PWM signal generation IC U4 is connected with switch MOS tube Q41 respectively, the PWM signal generation IC U4 is connected with potentiometer RX41A, the duty cycle of PWM signal generation IC U4 is controlled by adjusting the resistance value of potentiometer RX41A, and adjustable driving voltage is output.

[0009] The utility model has the advantages of:

[0010] 1, the utility model discloses a kind of multi-channel switching light modulation control technology for solving the problem that existing controller is single in purpose, and cannot control and adjust other lighting system, integrates multiple functions, and the purpose is integrated into one, realize that one control equipment is switched on, mode switching, brightness adjustment etc.

[0011] 2, the utility model is integrated with application to multiple lamps, multiple functions by modularization and standardization design, using least several circuits, greatly simplifies lighting control equipment, improves equipment reliability, security and man-machine efficiency. DRAWINGS

[0012] Figure 1The overall circuit diagram of the embodiment of the utility model;

[0013] Figure 2 The circuit diagram of the top light working mode switching circuit in the embodiment of the utility model;

[0014] Figure 3 The circuit diagram of the top light switch and dimming circuit in the embodiment of the utility model;

[0015] Figure 4 The circuit diagram of the driving voltage conversion circuit in the embodiment of the utility model. DETAILED DESCRIPTION

[0016] The embodiments of the utility model will be described in detail below with reference to the drawings.

[0017] EMBODIMENT

[0018] A kind of multi-channel switching dimming control circuit, is a kind of circuit for controlling multi-channel lighting system.This embodiment is based on the lighting demand in certain airborne cabin, for upper cabin ceiling lamp, two floor ceiling lamp, left and right tethered lamp, signal lamp, operating lamp and instrument light guide plate etc.Illumination equipment, integrated design multi-channel switching dimming control circuit with switch control, mode switching and dimming etc.Functions.

[0019] Multi-channel switching dimming control circuit principle as Figure 1 Shown, multi-channel switching dimming control circuit mainly includes upper cabin three mode ceiling lamp and two floor lamp control circuit, operating table lighting lamp control circuit, signal lamp control circuit and light guide plate control circuit etc.

[0020] Upper cabin ceiling lamp and two floor lamp function is same, DC28V power input cargo compartment dimming controller, through power switching circuit, DC28V power is directly output to three mode ceiling lamp, dimming controller internal relevant circuit module and subsequent each illumination equipment provide normal working power supply.Dimming controller operating panel has upper cabin lamp, two floor lamp, operating table lighting lamp, signal lamp, light guide plate and tethered point lamp switch and dimming knob, through switch or dimming knob control internal corresponding switch dimming module, DC28V is converted into corresponding driving voltage.

[0021] For the upper cabin ceiling light and the second-floor floor light, which are functionally identical, their switch module and 10V voltage conversion module share the same circuitry and operating mode switching circuit. The dimming controller receives the open / ground operating mode signal from the external input and the infrared mode switch signal from the operation panel. The operating mode switching circuit converts the DC28V to the operating mode signal voltage required by the upper cabin light and the second-floor floor light, outputting 0V, 5V, and 12V to provide the operating mode selection voltage for the upper cabin light and the second-floor floor light. The switch module outputs DC28V main power, providing the normal operating voltage of DC28V for the upper cabin light and the second-floor floor light. The 10V voltage conversion module outputs 0-10V voltage. Adjusting the 10V voltage conversion circuit via the dimming knob on the operation panel provides a 0V-10V analog dimming voltage signal to the upper cabin light and the second-floor floor light, enabling the ceiling light brightness adjustment function.

[0022] The left and right tether lamps have the same switch module, which outputs a DC28V main power supply. The tether lamps are turned on and off by a toggle switch on the control panel.

[0023] The switching modules and dimming modules of the signal lights and light guide plates have the same circuits. They are all controlled by the rotary switches of the corresponding devices on the operation panel to turn the switching modules on and off. The driving voltage is adjusted within the range of 0-28V by rotating the knob to adjust the brightness of the corresponding devices.

[0024] The brightness of the control panel lighting is controlled by a potentiometer voltage divider.

[0025] The signal light switch module is controlled by the indicator light switch button to detect the working status of the signal lights.

[0026] The control circuit includes three main circuit modules: a top light working mode switching circuit, a top light switch and dimming circuit, and a driving voltage conversion circuit for the control panel lighting and light guide plate.

[0027] The principle of the overhead light working mode switching circuit is as follows: Figure 2As shown in the upper cabin light and two floor light mode switching circuit, the core element is U1, U2 two DC-DC conversion IC, used to convert 28V to 12V and 5V. K1 is a single pole double throw relay, S1 is an infrared mode switch button, Q11 is a switch MOS triode. The working principle is that the open circuit / ground working mode voltage input by the external input controls K1 to close the point selection of a certain voltage conversion circuit. When the working mode voltage is open, K1 is connected to the 12V conversion circuit, and when the working mode is grounded, K1 is connected to the 5V conversion circuit. The 12V and 5V conversion circuits are connected to the switch MOS controlled by S1. S1 is a normally closed switch, and the MOS switch is always open. The output working mode voltage is 12V or 5V. Press the red mode switch, S1 is opened, and the MOS is disconnected. The working mode voltage is output as 0V through the pull-down resistor.

[0028] The top light switch and dimming circuit principle is as shown in Figure 3 As shown in the upper cabin light and two floor light control circuit, the core element U3 is a CW117 DC-DC conversion IC that converts 28V to 10V. K2 is a single pole single throw relay, S2 and RX31A are two functional units of the top light switch knob, and Q21 is a switch MOS. The working principle is that the 28V voltage input by the external input is controlled by S2 to turn on K2, close the output 28V working voltage to the top light. After K2 is turned on, Q21 is also turned on, and 0V, 5V or 12V working mode voltage is output to the top light through the MOS. By adjusting the resistance value of RX31A potentiometer, 0V-10V voltage output by U3 is output as a dimming signal to the top light.

[0029] The operating table lighting, light guide plate and signal lamp use the same control and drive circuit, as shown in Figure 4 As shown in the operating table lighting, light guide plate and signal lamp drive circuit, U4 is a PWM signal generation IC, K4 is a single pole single throw relay, S4 and RX41A are two functional units of the operating table lighting, light guide plate and signal lamp corresponding switch knob, and Q41 is a MOS switch. The working principle is that the 28V voltage input by the external input is controlled by S4 to turn on K4, close the output 28V working voltage to the operating table lighting, light guide plate and signal lamp. U4 is a 555 chip, and the 3rd pin of U4 can output a 0-100% duty cycle PWM signal by adjusting RX41A. Q41 is turned on or off according to the PWM signal, and the drive voltage output to the lamp is 28V voltage of the PWM signal. By designing the resistance value of R44 and the potentiometer, the output PWM voltage duty cycle can be set to 0-100% or 9%-100%, that is, the dimming voltage is 0-28V or 9V-28V.

[0030] The above-described embodiments only express the specific implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A multi-channel switching dimming control circuit, characterized by, The application relates to a multi-channel lighting system, which comprises a working mode switching circuit and a switch and light adjusting circuit, wherein the working mode switching circuit uses multiple DC-DC conversion ICs to convert the voltage of an external power supply into different driving voltages to drive the multi-channel lighting system, and the switch and light adjusting circuit uses a DC-DC conversion IC and a potentiometer to output adjustable driving voltage to the multi-channel lighting system.

2. The multi-channel switching dimmer control circuit of claim 1, wherein, The working mode switching circuit comprises DC-DC conversion ICs U1 and U2, the external power supply is connected with the input ends of the DC-DC conversion ICs U1 and U2 through relays K1, the output ends of the DC-DC conversion ICs U1 and U2 are connected with a switch MOS tube Q11, the switch MOS tube Q11 is connected with a normally closed switch S1, and the normally closed switch S1 is used for controlling the conduction or closing of the switch MOS tube Q11.

3. The multi-channel switching dimmer control circuit of claim 2, wherein, The switch and light adjusting circuit comprises a DC-DC conversion IC U3, the external power supply is connected with the input ends of a relay K2 and the DC-DC conversion IC U3 through a switch S1, the relay K2 is used for directly outputting the external power supply, and the relay K2 is connected with the output end of the working mode switching circuit through a switch MOS tube Q21; a potentiometer RX31A is arranged between the output end of the DC-DC conversion IC U3 and an adjusting end, and the resistance value of the potentiometer RX31A is adjusted to control the output of adjustable voltage signals of the DC-DC conversion IC U3.

4. The multi-channel switching dimming control circuit according to any one of claims 1-3, characterized in that, The application further comprises a driving voltage conversion circuit, the driving voltage conversion circuit comprises a PWM signal generation IC U4, the external power supply is connected with the power supply ends of a relay K4 and the PWM signal generation IC U4 through a switch S4, the output ends of the relay K4 and the PWM signal generation IC U4 are connected with a switch MOS tube Q41, a potentiometer RX41A is arranged on the PWM signal generation IC U4, the resistance value of the potentiometer RX41A is adjusted to control the duty cycle of the PWM signal generation IC U4, and thus adjustable driving voltage is outputted.

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