Lighting apparatus using white-light LEDs

• US 9,322,513 B2
• Filed: 04/04/2011
• Issued: 04/26/2016
• Est. Priority Date: 04/09/2010
• Status: Active Grant

• Current Assignee: Lumigreen Co., Ltd.
• Original Assignee: Lumigreen Co., Ltd.
• Inventors: Ryeol, Kim Soo
• Primary Examiner(s): Husar, Stephen F
• Assistant Examiner(s): ALLEN, DANIELLE NICOLE
• Application Number:
  US13/079,550
• Publication Number:
  US 20110248641A1
• Time in Patent Office: 1,849 Days
• Field of Search: 362/800, 362/1, 362/2, 362/11, 362/611, 362/612, 362/613, 362/555, 362/583, 362/508, 362/509, 362/510, 362/543, 362/545, 362/227, 362/230, 362/231, 362/235, 362/249.02, 362/249.03, 362/249.04, 362/311.02
• US Class Current: 1/1
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21S 6/003 for task lighting, e.g. for reading or desk work, e.g. angle poise lamps
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

Disclosed herein is a lighting apparatus using white-light Light-Emitting Diodes (LEDs). The lighting apparatus includes white-light LEDs, first LEDs, second LEDs, a substrate, a driving unit, and wires. The white-light LEDs emit light having a first peak value in a wavelength range of about 440 to 460 nm and a second peak value in a wavelength range of about 520 to 600 nm as a main light source. The first LEDs emit light having a third peak value in a wavelength range of about 610 to 625 nm as an auxiliary light source. The second LEDs emit light having a fourth peak value in a wavelength range of about 492 to 500 nm as an auxiliary light source. The substrate allows the LEDs to be disposed thereon. The driving unit drives the LEDs. The wires connect the substrate to the driving unit.

Claims

1. A lighting apparatus comprising:

a plurality of light emitting diodes (LEDs) consisting of;

white LEDs, each of the white LEDs configured to emit light having a first peak value in a wavelength range of about 440 to 460 nm and a second peak value in a wavelength range of about 520 to 600 nm as a main light source, and

first LEDs and second LEDs, both added in order to improve color rendering and sharpness of the white LEDs as the main light source,

wherein each of the first LEDs is configured to emit light having a third peak value in a wavelength range of about 610 to 625 nm and functions as an auxiliary light source to the white LEDs, and

wherein each of the second LEDs is configured to emit light having a fourth peak value in a wavelength range of about 492 to 500 nm and functions as an auxiliary light source to the white LEDs;

a substrate for allowing the white LEDs, the first LEDs, and the second LEDs to be disposed thereon;

a driving unit for driving the white LEDs, the first LEDs, and the second LEDs; and

wires for connecting the substrate to the driving unit,

wherein the first LEDs improve the color rendering of the white LEDs by increasing a color rendering index (CRI) of the plurality of LEDs to be greater than 90.

2. The lighting apparatus as set forth in claim 1, wherein the lighting apparatus is a movable lighting apparatus.

3. The lighting apparatus as set forth in claim 2, further comprising an anti-glare filter.

4. The lighting apparatus as set forth in claim 1, wherein the lighting apparatus is a stationary lighting apparatus.

5. The lighting apparatus as set forth in claim 1, wherein each of the first LEDs has only a single peak having the third peak value, and each of the second LEDs has only a single peak having the fourth peak value.

6. The lighting apparatus as set forth in claim 5, wherein each of the white LEDs has only two peaks having the first and second peak values.

7. The lighting apparatus as set forth in claim 6, wherein the CRI of the plurality of LEDs is between about 92 and 96.

8. A light emitting diode (LED) lamp comprising:

a plurality of LEDs consisting of;

white LEDs disposed on a lower surface of the LED lamp, each of the white LEDs configured to emit light having a first peak value in a wavelength range of about 440 to 460 nm and a second peak value in a wavelength range of about 520 to 600 nm as a main light source, and

first LEDs and second LEDs, both added in order to improve color rendering and sharpness of the white LEDs as the main light source,

wherein the first LEDs are disposed on the lower surface of the LED lamp, and each of the first LEDs is configured to emit light having a third peak value in a wavelength range of about 610 to 625 nm and functions as an auxiliary light source to the white LEDs, and

wherein the second LEDs are disposed on the lower surface of the LED lamp, and each of the second LEDs is configured to emit light having a fourth peak value in a wavelength range of about 492 to 500 nm and functions as an auxiliary light source to the white LEDs;

a base configured to receive Alternating Current (AC) power;

a driving unit configured to drive the white LEDs, the first LEDs, and the second LEDs; and

a substrate configured such that terminals of the white LEDs, the first LEDs and the second LEDs and the driving unit are disposed thereon and AC power is supplied by the base thereto,

wherein the first LEDs improve the color rendering of the white LEDs by increasing a color rendering index (CRI) of the plurality of LEDs to be greater than 90.

9. The LED lamp as set forth in claim 8, wherein each of the first LEDs has only a single peak having the third peak value, and each of the second LEDs has only a single peak having the fourth peak value.

10. The LED lamp as set forth in claim 9, wherein each of the white LEDs has only two peaks having the first and second peak values.

11. The LED lamp as set forth in claim 10, wherein the CRI of the plurality of LEDs is between about 92 and 96.