Led device having adjustable color temperature

A technology for LED devices and LED light sources, applied in lighting devices, lighting device components, circuit layouts, etc., can solve problems such as limitations, and achieve the effect of high color rendering performance and maintaining color rendering performance.

Inactive Publication Date: 2014-04-09
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This LED device can also realize various color coordinates, however, as long as the LED device uses red LED, blue LED and green LED with a narrow full width at half maximum There will be limitations in achieving high color rendering performance within a wide color temperature range

Method used

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  • Led device having adjustable color temperature
  • Led device having adjustable color temperature
  • Led device having adjustable color temperature

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Embodiment Construction

[0024] best practice

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, the shapes and dimensions of elements may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like elements.

[0026] figure 1 is a circuit diagram showing an LED device according to an embodiment of the present invention. refer to figure 1 The LED device according to an embodiment of the present invention may include a first LED light source unit 120 and a second LED light source unit 130 that emit white light with different color temperatures from each other. White light emitted from the first LED light source unit 120 and white light emitted from the second LED light source unit 130 may be mixed to output whit...

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PUM

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Abstract

According to one aspect of the present invention, an LED device comprises: a first light source unit provided with at least one first white LED and emitting white light having a first light temperature; a second light source unit provided with at least one second white LED and emitting white light having a second color temperature different from the first color temperature; and a variable resistor connected to at least one of the first and second light source units and adjusting a current provided to at least one of the first and second light source units.

Description

technical field [0001] The present invention relates to a light emitting diode (LED) device, and more particularly, to a color temperature controllable white light LED and an LED device capable of achieving high color rendering performance and various color temperatures by including the LED White light or full-color light, while maintaining luminous flux. Background technique [0002] Recently, light emitting diodes (LEDs) have been prominently used as light sources of lighting devices or backlights. In particular, white LEDs have advantages in improvement of performance such as improvement in color reproduction, reduced power consumption, and environmental friendliness, and are favored for being able to replace existing fluorescent lamps to lead white light sources for lighting devices. extensive attention. A white LED may include an LED chip having a short wavelength, and a phosphor that absorbs light emitted from the chip and converts the short-wavelength light into lon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCH05B33/0857F21K9/56F21V23/0442F21Y2113/17H05B45/20
Inventor 文敬美李永镇蔡程惠金亨根
Owner SAMSUNG ELECTRONICS CO LTD
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