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LED serial-parallel circuit and LED illumination device

A technology of LED lighting and series branches, which is applied in lighting devices, lighting device components, circuit layout, etc., to achieve the effect of current stability

Inactive Publication Date: 2011-04-20
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, it is necessary to provide an LED series-parallel circuit to solve the problem of ensuring the stability of the current flowing through each light-emitting diode in the LED series-parallel circuit

Method used

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  • LED serial-parallel circuit and LED illumination device
  • LED serial-parallel circuit and LED illumination device
  • LED serial-parallel circuit and LED illumination device

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the embodiments and accompanying drawings.

[0020] see figure 1 , the LED lighting device 10 includes an LED series-parallel circuit 7 and a constant current drive circuit 8 for receiving a power supply voltage to drive the LED series-parallel circuit 7 to emit light. The LED series-parallel circuit 7 includes at least two LED series branches 18, and each LED series branch 18 is connected in series with a constant current diode 20 (Current Regulative Diode).

[0021] see figure 2 The LED series branch 18 includes several LEDs (light-emitting diodes, light-emitting diodes) connected in series. In this embodiment, each LED series branch 18 is connected to the anode of the constant current diode 20 through a voltage dividing resistor 19 . The cathodes of the constant current diodes 20 are grounded through the resistor R1.

[0022] In other implementations, see image 3 , the cathode of the c...

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PUM

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Abstract

The invention provides an LED illumination device, comprising an LED serial-parallel circuit and a constant current driving circuit for driving the LED serial-parallel circuit to illuminate; the LED serial-parallel circuit includes at least two LED serial branch circuits; each of the LED serial branch circuits is serially connected with a constant current diode and then parallel connected with other LED serial branch circuits. The current passing through each light emitting diode in the LED serial-parallel circuit is ensured to be stable. The invention further provides an LED serial-parallel circuit applied in the LED illumination device.

Description

technical field [0001] The invention relates to an LED illuminating device, in particular to an LED series-parallel circuit and an illuminating device comprising the LED series-parallel circuit. Background technique [0002] Light emitting diodes (LEDs) have been widely used in the lighting field as light sources. In order to ensure that the illumination of light-emitting diodes satisfies the function of lighting, various LED lighting devices in the market include a constant current drive circuit to provide a stable current to drive the light-emitting diodes to emit light. These LED lighting devices generally include an LED series-parallel circuit composed of several light-emitting diodes. A constant current drive circuit in the LED lighting device receives a power supply voltage to provide a stable current to drive the LED series-parallel circuit to emit light. However, the constant current driving circuit of the above-mentioned LED lighting device generally can only ensur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V23/02F21Y101/02
CPCH05B33/0821H05B45/40
Inventor 纪德和赵扬睿谢志强付继保唐觅吴文涛
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD