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Light adjusting and color adjusting circuit of LED lamp

A technology of LED lamps and LED lamp beads, which is applied in the field of dimming and color temperature circuits, can solve the problems that cannot be built in, cannot be realized, and the control method is complicated, so as to achieve the effect of dimming and color temperature

Pending Publication Date: 2019-03-26
GUANGDONG NRE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional implementation method is to design two LEDs and adjust the LED current of each LED to adjust the color temperature. The control method of this method is very complicated. It cannot be built in when the internal space of MR16 / GU10 is limited, and it cannot be realized at present.

Method used

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  • Light adjusting and color adjusting circuit of LED lamp

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Embodiment Construction

[0017] The present invention is further described in conjunction with the following examples.

[0018] A dimming and color temperature circuit of an LED lamp in this embodiment is used to connect to the LED lamp driver chip 3, such as figure 1 As shown, it includes an LED cold light string 1 and an LED warm light string 2 connected in parallel with the LED cold light string 1, the LED cold light string 1 includes 10 LED lamp beads, and the LED warm light string 2 Including the number of LED lamp beads is 8, the turn-on voltage of a single LED lamp bead is 2.5V, the normal working voltage of a single LED lamp bead is 3V, the number of LED cold light beads and the number of LED warm light beads change The trend is satisfied: 10×2.5>3×8, the initial current when the LED cold light string is not dimmed is I 1 , the initial current when the LED warm light string is not dimmed is I 2 , the I 1 and I 2 The size meets: I 1 >4×I 2 , and there is little change in a certain curren...

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Abstract

The invention discloses a light adjusting and color adjusting circuit of an LED lamp, and relates to the technical field of LED lamps, wherein the circuit comprises an LED cold light string and an LEDwarm light string connected in parallel with the LED cold light string. The number of LED lamp beads contained in the LED cold light string is N1, and the number of LED lamp beads contained the LED warm light string is N2, wherein N1 and N2 satisfy the relation ofN1*V1>N2*V2, V1 is the turn-on voltage of the LED lamp beads, V2 is the normal working voltage of the LED lamp beads. The initial current when the LED cold light string is not dimmed is I1, and the initial current when the LED warm light string is not dimmed is I2 , and the I1 and I2 satisfy the relation of I1>4*I2. The light adjusting and color adjusting circuit includes a resistor R, and the resistor R is connected in series with the LED warm light string. Two LED light strings of different color temperature, including the LEDcold light string and LED warm light string, are designed, two light strings can be driven with a single driving module to realize dimming, thereby realizing built-in mode when the internal space of MR16 / GU10 is limited and achieving color temperature dimming.

Description

technical field [0001] The invention relates to the technical field of LED lamps, in particular to a dimming, color-adjusting and temperature-adjusting circuit for LED lamps. Background technique [0002] In order to create a warm living environment, in the application where the light source lamp type is MR16 / GU10, it is hoped that the color temperature can be adjusted while dimming. When the light is strong, the color temperature is cooler. With the dimming, when the light drops, The color temperature gradually decreases, and when it becomes the night light mode, it is fixed at a warm color temperature. The traditional implementation method is to design two LEDs and adjust the color temperature by adjusting the LED current of each LED. The control method of this method is very complicated. It cannot be built in when the internal space of MR16 / GU10 is limited, and it cannot be realized at present. Contents of the invention [0003] The object of the present invention is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/20H05B45/10
Inventor 刘新明
Owner GUANGDONG NRE TECH
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