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Driving device for lighting circuit and illumination device

A lighting circuit and driving device technology, which is applied to lighting devices, lamp circuit layout, energy-saving lighting, etc., can solve the problems of high manufacturing cost, inability to directly apply the driving device, and low production volume, and achieve the effect of reducing manufacturing costs

Inactive Publication Date: 2014-03-19
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the DC type lighting circuit, the duty cycle (on duty, ratio of the on time to the off time) of the switching element is smaller than that of the AC type lighting circuit, or the current flowing in the circuit is changed. The on-off control corresponding to zero-crossing detection is completely different from the on-off control of the AC type lighting circuit. Therefore, in the AC type lighting circuit and the DC type lighting circuit, it cannot be directly applied to drive Drives for switching elements
[0006] However, in the current situation where the DC lighting source is basically not popular as a light source for lighting, if you want to manufacture a drive device dedicated to the DC lighting source, the production volume is small, so compared with the drive device for the discharge lamp, it is more expensive to manufacture. high cost

Method used

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  • Driving device for lighting circuit and illumination device
  • Driving device for lighting circuit and illumination device
  • Driving device for lighting circuit and illumination device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0055] Such as figure 2 As shown, the driving device 1 of the present embodiment is composed of a single-chip integrated circuit, and is a device that outputs a driving signal of a rectangular wave, which is used to form a series connection in a half-bridge conversion circuit for lighting the discharge lamp La The two switching elements Q1 and Q2 of the circuit (hereinafter referred to as "switching circuit") 3 are periodically turned on and off, so that the two switching elements Q1 and Q2 are turned on alternately. In addition, figure 2 An example of a lighting device in a case where the discharge lamp La is used as a light source is shown. The above-mentioned switching elements Q1 and Q2 are respectively composed of MOSFETs and constitute a series circuit. One end of the series circuit is input with a DC voltage from the DC power supply 2 and the other end is grounded. In addition, the driving device 1 has a first output terminal Hout connected to the gate of a high-side (...

Embodiment approach 2

[0079] The basic structure of this embodiment is the same as that of the first embodiment, so the description of the same parts is omitted.

[0080] In the first embodiment, the change of the operating frequency is the change of the duty ratio of each drive signal. In contrast, in this embodiment, the duty ratio of each drive signal can be changed independently of the operating frequency.

[0081] Specifically, in this embodiment, as Figure 14 As shown, each drive signal generating circuit 105a, 105b (only the first drive signal generating circuit 105a is shown) is provided with a current mirror circuit M103 for drawing a charging current to the delay generating capacitor C104, and a second control The part 104 is not connected to the oscillating part 103, but is connected to the output terminal of the above-mentioned current mirror circuit M103. As a result, while the output of the setting unit 108 is at a low level and the second control unit 104 is operating, the charging of th...

Embodiment approach 3

[0084] The basic structure of this embodiment is the same as that of the second embodiment, so the description of the same parts is omitted.

[0085] In this embodiment, as Figure 18 As shown, the gate of the charging switching element Qc of the oscillation section 103 is grounded via a first switching element Q106 composed of an n-channel field effect transistor. The first changeover switch element Q106 is connected to the setting unit 108 via a negation circuit (inverter circuit) INV02.

[0086] In addition, the driving device 1 of the present embodiment includes a second charging mirror circuit M104, one input terminal is connected to the connection point of the charging mirror circuit M101 of the oscillation part 103 and the charging switching element Qc, and the other input terminal is connected to The constant current source Iref2, and each output terminal is grounded respectively; and the second switching element Q107, which is composed of an n-channel field effect transist...

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PUM

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Abstract

[Object] To provide a driving device for a lighting circuit and an illumination device using the driving device for the lighting circuit usable for both a DC lighting light source and a discharge lamp. [Means for Settlement] A driving device 1 for on-off driving two switching elements constituting a lighting circuit by output voltages from output terminals Hout and Lout has a setting terminal Vsel, and switches an operation for a discharge lamp and an operation for a DC lighting light source in accordance with an input voltage to the setting terminal Vsel.

Description

Technical field [0001] The present invention relates to a driving device for a lighting circuit and a lighting device. Background technique [0002] Conventionally, there has been provided a driving device (for example, refer to Patent Document 1) for driving a switching element of a half-bridge-shaped conversion circuit, which is a lighting circuit that supplies alternating current to a discharge lamp to light it. Hereinafter, it is referred to as "AC type lighting circuit"). That is, the above-mentioned conversion circuit includes a series circuit of a resonance circuit and two switching elements (for example, MOSFET). The series circuit of the two switching elements is connected between the output ends of a DC power supply. The resonance circuit includes a discharge lamp and is connected to one Between the two ends of the switching element. The driving device alternately drives the two switching elements on and off to supply the AC power generated by the resonance of the res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H05B41/18H05B41/36H05B44/00
CPCH05B41/282H05B33/0806H05B45/10H05B45/39Y02B20/00Y02B20/30H05B45/38
Inventor 滨本胜信黑木芳文
Owner PANASONIC CORP