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Light source and light emitting diode lamp circuit thereof

A light-emitting diode lamp and circuit technology, applied in the field of circuits, can solve the problems of small dimming range of input power supply units and the like

Inactive Publication Date: 2012-09-19
莫绍祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the above light-emitting diode lamp circuit, the dimming range of the input power unit is relatively small.

Method used

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  • Light source and light emitting diode lamp circuit thereof
  • Light source and light emitting diode lamp circuit thereof
  • Light source and light emitting diode lamp circuit thereof

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Experimental program
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Embodiment Construction

[0016] The light-emitting diode lamp circuit and the light source with the circuit of the present invention will be further described in detail below with reference to the drawings and embodiments.

[0017] see Figure 5 , which is a circuit diagram of a light-emitting diode lamp according to the first preferred embodiment of the present invention, including a light string 101 formed by connecting multiple light-emitting diode lights in series, and an input power supply unit 102 connected to the light string 101 . In this preferred embodiment, one end of the light string 101 is connected in series with a current-limiting resistor R1, and the number of light-emitting diode lights 101 is three, namely D1, D2, and D3, wherein D1 and D2 are respectively connected in parallel with a resistor, which is R2 in turn. , R3. Among them, the resistance value of R1 is 120Ω, the resistance value of R2 is 470Ω, and the resistance value of R3 is 2KΩ. If D1 and D2 are not connected in parall...

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PUM

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Abstract

The invention relates to a light source and a light emitting diode lamp circuit thereof. The light emitting diode lamp circuit is connected in series with a plurality of light emitting diode lamps to form a lamp string, and at least one light emitting diode lamp on the lamp string is connected in parallel with a resistor. The light emitting diode lamp circuit can allow the brightness of the lamp string to be gradually adjusted within a larger voltage range by the fact that at least one light emitting diode lamp is connected in parallel with a resistor.

Description

technical field [0001] The invention relates to a circuit, in particular to a light-emitting diode lamp circuit capable of dimming and changing the color of a light-emitting diode lamp and a light source with the circuit. Background technique [0002] see Figure 1-4 , showing several existing common light emitting diode (Light emitting diode, LED) lamp circuits. figure 1 The LED lamp circuit shown includes a lamp string 11 formed by connecting a plurality of LED lamps in series and an input power unit 12 connected to the lamp string 11 . The brightness of the lamp string 11 is regulated by the input power unit 12 . figure 2 The shown LED lamp circuit includes a lamp string 21 formed by a plurality of LED lamps connected in series, a current limiting circuit 22 connected to the lamp string 21 , and an input power unit 23 connected to the current limiting circuit 22 . Wherein, the designed current value determines the brightness of the light string 21 . image 3 The LED l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V23/02F21S4/00F21Y101/02F21Y115/10
Inventor 莫绍祥
Owner 莫绍祥