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Single-stage driving circuit and multistage driving circuit

A drive circuit, single-stage technology, applied in the direction of electric lamp circuit layout, electric light source, lighting device, etc., can solve the problems of large volume, high installation cost, high cost, etc., and achieve the effect of simple circuit structure, small circuit volume and convenient adjustment

Inactive Publication Date: 2015-09-16
SHANGHAI ZHIYAO LIGHTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For this reason, the technical problem to be solved by the present invention is that the resistance-capacitance step-down drive circuit in the prior art has no protection function, is bulky, and has high installation cost, and the work efficiency of the resistive step-down drive circuit is low, while the integrated IC constant current and constant voltage The drive circuit has many disadvantages such as complex structure and process, high cost, difficult debugging, difficult certification, unreliable quality, etc.

Method used

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  • Single-stage driving circuit and multistage driving circuit
  • Single-stage driving circuit and multistage driving circuit
  • Single-stage driving circuit and multistage driving circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] see Figure 1A , the single-stage driving circuit according to Embodiment 1 of the present invention is used to drive a set of light-emitting circuits 13 including at least one light-emitting element, including:

[0057] The first resistor 12 is connected to the power supply line of the light emitting element;

[0058] The first controllable switch 101, the control end and the output end of the first controllable switch 101 are respectively connected to the two ends of the first resistor 12, when the voltage across the first resistor 12 is greater than or equal to the preset value, the first controllable The switch 101 is turned on, and when the voltage across the first resistor 12 is less than a preset value, the first controllable switch 101 is turned off;

[0059] The second controllable switch 102, the input terminal of the second controllable switch 102 is connected with the power supply, the control terminal of the second controllable switch 102 is connected with ...

Embodiment 2

[0064] see Figure 1B , compared with Embodiment 1, the single-stage drive circuit of Embodiment 2 of the present invention adds a Zener diode 104 between the control terminal and the output terminal of the second controllable switch 102, so that it is clamped at the second controllable switch The control terminal and the output terminal of 102 are within the safe voltage range of breakdown, preventing breakdown of the control terminal and output terminal, and protecting the second controllable switch 102 . The cathode of the Zener diode 104 is connected to the control terminal of the second controllable switch 102 , and the anode of the Zener diode 104 is connected to the output terminal of the second controllable switch 102 through the first resistor 12 .

[0065] In addition, preferably, in order to make the second controllable switch 102 have a reliable and sufficient switch driving bias voltage under any waveform circuit or any voltage fluctuation, the single-stage drivin...

Embodiment 3

[0083] see Figure 5 , according to the multi-level drive circuit of Embodiment 3 of the present invention, such as Figure 5 As shown, by multiple Figure 2A The LED single-stage driving circuit in the LED can be connected in cascade to form a higher voltage and higher power LED driving circuit. Figure 5 An implementation manner of a multi-level LED driving circuit is disclosed. In this implementation manner, a plurality of LED strings are connected after each level of the driving circuit. Specifically, Figure 5 The LED multi-stage drive circuit in is composed of 3 Figure 2A The LED single-stage drive circuit in the LED drive circuit is connected in cascade, which includes a 3-stage LED drive circuit. The input terminal 111-1 of the drive chip 1-1 in the first-stage LED drive circuit is connected to the power supply V+, and the output terminal 112-1 Connect one end of the first resistor 12-1, the output end 113-1 is connected to the other end of the first resistor 12 a...

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Abstract

The invention discloses single-stage and multistage driving circuits used for driving a luminescence circuit. The single-stage driving circuit comprises a first resistor, a first controlled switch, a second controlled switch and a second resistor, wherein the first resistor is connected into a power supply line of a luminous component; a control end and an output end of the first controlled switch are connected to two ends of the first resistor; when a voltage of the two ends of the first resistor is greater than or equal to a preset value, the first controlled switch is conducted; when the voltage of the two ends of the first resistor is less than the preset value, the first controlled switch is off; an input end of the second controlled switch is connected to a power supply; a control end of the second controlled switch is connected to an input end of the first controlled switch; an output end of the second controlled switch is connected to the control end of the first controlled switch; when the first controlled switch is conducted, the second controlled switch is off; when the first controlled switch is off, the second controlled switch is conducted; two ends of the second resistor are connected to the control end and the input end of the second controlled switch respectively.

Description

technical field [0001] The present invention relates to the technical field of circuit driving, in particular to a single-stage driving circuit and a multi-stage driving circuit, which are respectively used to drive one group and multiple groups of light-emitting circuits including at least one light-emitting element. Background technique [0002] With the popularity of light-emitting element lighting such as LEDs, research on lighting LED driving circuit technology has become a technical challenge. At present, commonly used LED driving circuits include the simplest RC step-down driving circuit, which has low manufacturing cost, and simpler driving circuits even directly adopt resistive step-down driving. The resistance-capacitance step-down drive circuit has no protection function, is bulky, and increases installation costs; in addition, direct step-down drive with a resistor consumes additional power, which is equivalent to reducing the efficiency of the LED and has no rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 李崇新
Owner SHANGHAI ZHIYAO LIGHTING TECH