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Light source and light emitting diode lamp circuit thereof

Inactive Publication Date: 2014-09-10
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 of the present invention and the light source with the circuit will be described in further detail below in conjunction with the drawings and embodiments.

[0017] See Figure 5 , Shown is a circuit diagram of a light-emitting diode lamp according to the first preferred embodiment of the present invention, which includes a light string 101 formed by a plurality of light-emitting diode lamps in series, and an input power 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 LED lights 101 is three, D1, D2, and D3. Among them, D1 and D2 are connected in parallel with a resistor, respectively, R2 , 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 resistors R2 and R3 are not connected in parallel on D1 and D2, the adjustment range ...

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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 colors of a light-emitting diode lamp and a light source with the circuit. Background technique [0002] See Figure 1-4 , Shown are several common light emitting diode (LED) lamp circuits. figure 1 The light-emitting diode lamp circuit shown includes a light string 11 formed by a plurality of light-emitting diode lamps in series and an input power supply unit 12 connected to the light string 11. The light string 11 is controlled by the input power unit 12 to control brightness. figure 2 The light-emitting diode lamp circuit shown includes a light string 21 formed by a plurality of light-emitting diode lamps in series, a current limiting circuit 22 connected to the light string 21, and an input power supply unit 23 connected to the current limiting circuit 22. Among them, the designed current value determines the brightness of the light s...

Claims

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Application Information

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