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Lighting power supply and lighting device

A technology of power supply and lighting load, applied in the field of lighting power supply and lighting device, can solve the problems of difficulty in detecting current, unstable lighting, flickering, etc., and achieve the effect of expanding the variable range

Active Publication Date: 2016-11-16
TOSHIBA LIGHTING & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the light output is gradually reduced by the switching operation, the switching regulator (switching regulator) is in either the operating state or the non-operating state in the state where the illumination light source is finely lit, so flickering is likely to occur. Feedback also makes it difficult to detect tiny currents during tiny lighting, and tends to fall into unstable lighting

Method used

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  • Lighting power supply and lighting device
  • Lighting power supply and lighting device
  • Lighting power supply and lighting device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0089] figure 1 It is a block diagram illustrating an example of a lighting device including a power supply for lighting according to the first embodiment.

[0090] Such as figure 1 As shown, the lighting device 1f includes: a lighting load 2 and a lighting power supply 3f that supplies power to the lighting load 2 .

[0091] The lighting load 2 includes, for example, lighting light sources 4 such as LEDs, and is supplied with output power POUT (output voltage VOUT, output current IOUT) from a lighting power supply 3f to be lit. In addition, the light of the lighting load 2 can be adjusted by changing the output power POUT. For example, dimming can be performed by changing at least one of the output voltage VOUT and the output current IOUT. In addition, the respective values ​​of the output power POUT, the output voltage VOUT, and the output current IOUT are prescribed according to the illumination light source 4 .

[0092] figure 2 It is a characteristic diagram illustr...

no. 2 approach

[0134] Figure 5(a) ~ Figure 5(d) It is a waveform diagram illustrating the current waveform of the output element in the second embodiment. FIG. 5(a) shows the case of the continuous conduction operation, and FIGS. 5(b) and 5(c) are switched to the continuous conduction operation. In the case of the action of the switch action, Fig. 5(d) is the case of the switch action. Furthermore, in Figure 5(a) ~ Figure 5(d) In , the abscissa represents time t, and shows the waveform of the current I5 of the output element 5 .

[0135] The second embodiment differs from the first embodiment in the operation of the output element 5 .

[0136] As shown in FIG. 5( a ), when the output power POUT is equal to or less than the relatively small first output, the entire period of time t becomes the first period T1 during which the output element 5 continues to conduct the conduction operation. A substantially constant direct current limited by the constant current element 6 flows into the out...

no. 3 approach

[0142] Next, a third embodiment will be described.

[0143] Figure 6 It is a block diagram illustrating an example of a lighting device including a power supply for lighting according to a third embodiment.

[0144] Such as Figure 6 As shown, the lighting device 1 includes: a lighting load 2 , and a power supply 3 for lighting that supplies power to the lighting load 2 . The lighting device 1 including the lighting power supply 3 according to the third embodiment differs from the lighting device 1f according to the first embodiment in the configuration of the lighting power supply 3f. The lighting load 2 is the same as the lighting load 2 in the first embodiment.

[0145] The lighting power supply 3 includes an output element 5 , a constant current element 6 connected in series with the output element 5 to limit the current flowing through the output element 5 , and a first drive circuit 70 that drives the output element 5 .

[0146] The output element 5 is connected bet...

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PUM

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Abstract

The invention provides a power supply for lighting and a lighting device. A power supply for lighting according to an embodiment of the present invention includes an output element. The output element is connected between the power supply and the lighting load, and can be switched into a switching action and a continuous conducting action. The switching action causes the on state and the off state to appear repeatedly, and the continuous conducting action continues to maintain the conduction pass status.

Description

technical field [0001] Embodiments of the present invention relate to a power supply for lighting and a lighting device. Background technique [0002] In recent years, for lighting devices, the lighting source is being replaced from an incandescent bulb or a fluorescent lamp to an energy-saving and long-life light source such as a light-emitting diode (LED). In addition, new lighting sources such as electro-luminescence (Electro-Luminescence, EL) elements or organic light-emitting diodes (Organic light-emitting diode, OLED) have also been developed. The light output of these illumination light sources depends on the value of the flowing current. Therefore, when lighting the illumination light sources, a power supply circuit that supplies a constant current is required. In addition, when dimming is performed, the supplied current is controlled. [0003] The two-wire dimmer is configured to control the phase that turns a bidirectional switching transistor (triac) on, and has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H05B44/00
CPCH05B45/37H05B45/3575Y02B20/30H05B45/31H05B45/395
Inventor 北村纪之大武宽和高桥雄治辻俊雄
Owner TOSHIBA LIGHTING & TECH CORP