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Dimming signal interface circuit

A dimming signal and interface circuit technology, which is applied in the field of lighting, can solve the problems of not being able to apply multiple dimming signals at the same time, and the limitation of the versatility of the light source drive circuit, so as to reduce the cost of research and development, reduce the volume, and simplify the dimming circuit. Effect

Active Publication Date: 2014-12-10
INVENTRONICS HANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the versatility of the existing light source driving circuit with dimming function is limited, and it cannot be applied to multiple dimming signals at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] For a schematic diagram of the dimming signal interface circuit of the present invention in the dimming circuit, see figure 2 , the dimming signal interface circuit (shown in the dotted line box) includes: signal input terminal In, constant amplitude module 10, average value module 20, signal type judgment module 30, level gating module 40, PWM gating module 50 And the signal output terminal Out. in,

[0063] The signal input terminal In is used for receiving the dimming signal Vin. The dimming signal may be a level dimming signal, or a PWM dimming signal. It can be seen that both the level dimming signal and the PWM dimming signal are uniformly input to the same signal input terminal In.

[0064] The equal-amplitude module 10 is configured to receive the dimming signal Vin received by the signal input terminal In, and adjust the amplitude of the dimming signal Vin to a preset value before outputting. Regardless of whether the amplitude of the dimming signal Vin is...

Embodiment 2

[0073] see Figure 5 and Figure 6 , on the basis of Embodiment 1, the dimming signal interface circuit of this embodiment (shown in the dotted line box) includes: signal input terminal, constant amplitude module 10, average value module 20, signal type judgment module 30, level The gating module 40, the PWM gating module 50, the first impedance matching module 60, the second impedance matching module 70 and the signal output terminal. Among them, the functions and results of the constant amplitude module 10, the average value module 20, the signal type judging module 30, the signal type judging module 40 and the PWM gating module 50 are the same as those in the first embodiment, and will not be repeated here.

[0074] The first impedance matching module 60 is connected in series between the signal input terminal and the level gating module 40 , or the first impedance matching circuit 60 is connected in series between the level gating module 40 and the signal output terminal....

Embodiment 3

[0080] see Figure 7 , is a schematic structural diagram of a constant-amplitude module in the dimming interface circuit. The constant-amplitude module 101 (shown in a dotted line box) includes: a constant voltage source, a current limiting unit, and an on-off unit. The current unit is connected to the input end of the average value module, the on-off unit is connected between the output end of the current-limiting unit and the reference ground, and the dimming signal Vin at the signal input end is input to the on-off unit for controlling the on-off unit. on and off.

[0081] In this embodiment, when the dimming signal Vin is a level signal, the level strobe module is turned on, and the PWM strobe module is turned off. At this time, the output signal of the constant amplitude module 101 does not matter. Therefore, the details will not be repeated here. Describe the on-off situation of the on-off unit when the dimming signal Vin is a level signal. When the dimming signal Vin ...

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Abstract

The invention provides a dimming signal interface circuit which comprises a signal input end, a uniform amplitude module, an average value module, a signal type judgment module, a level gating module, a PWM (Pulse Width Modulation) gating module and a signal output end, wherein after the amplitude of a dimming signal is regulated into a preset value through the uniform amplitude module, the average value module outputs an average value of the signal; the signal type judgment module judges the type of the dimming signal and outputs a level gating signal to the level gating module or outputs a PWM gating signal to the PWM gating module; the level gating module outputs the dimming signal to the signal output end under the action of the level gating signal; and the PWM gating module outputs the output signal of the average value module to the signal output end under the action of the PWM gating signal. The dimming signal interface circuit provided by the invention can be suitable for various kinds of different dimming signals, thus the generality of the dimming circuit is increased.

Description

technical field [0001] The invention relates to the lighting field, in particular to a dimming signal interface circuit for a light source driving circuit. Background technique [0002] In the lighting field, in order to save energy, it is necessary to configure a light source driving circuit with a dimming function for the light source, so that the brightness of the light source is controlled by a dimming signal. [0003] The schematic diagram of the dimming circuit connected to the light source is as follows: figure 1 As shown, the dimming circuit includes a power supply, a light source driving circuit and a dimming signal input terminal. The light source drive circuit is connected between the power supply and the light source, and is used to convert the power supply into a power source capable of driving the light source to emit light normally. The light source drive circuit is generally equipped with a dimming signal input terminal for receiving the dimming signal. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 罗世伟吴莲
Owner INVENTRONICS HANGZHOU