Illuminating device

• US 9,565,735 B2
• Filed: 03/10/2016
• Issued: 02/07/2017
• Est. Priority Date: 12/28/2011
• Status: Expired due to Fees

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Lai, Chih-Chen
• Primary Examiner(s): King, Monica C
• Application Number:
  US15/065,873
• Publication Number:
  US 20160186946A1
• Time in Patent Office: 334 Days
• 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: F21S 10/023 by selectively switching fixed light sources
• CPC Class Codes: F21Y 2101/00 Point-like light sources
• CPC Class Codes: F21Y 2105/00 Planar light sources
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/12 characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: F21Y 2115/15 Organic light-emitting diodes [OLED]
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 47/10 Controlling the light source

Abstract

A color temperature adjusting method of solid state light emitting device, including steps: providing a main light source which emits main light of a first color temperature; providing an adjusting light source, wherein the adjusting light source comprises a red light source, a green light source and a blue light source; and adjusting currents applied to the adjusting light sources to obtain an adjusting light, wherein the adjusting light mixes with the main light of the main light source to obtain an outgoing light of a second color temperature. The second color temperature is different from the first color temperature. The outgoing light has a chromaticity coordinate at a Plank'"'"'s curve on a CIE 1931 chromaticity coordinates chart.

Claims

1. An illuminating device, comprising:

a main light source;

a plurality of red light sources;

a plurality of blue light sources; and

a plurality of green light sources;

wherein the main light source is set in a middle of the illuminating device, and the red, blue and green light sources alternately surround the main light source; and

wherein current applied to each the red, blue and green light sources is changeable to change color temperature of light from the main light source by mixing light of the red, blue, green light sources with the light from the main light source, the light from the main light source and the light from the red, blue and green light sources being mixed together to obtain an outgoing light of the illuminating device which has a chromaticity coordinate located at a Plank'"'"'s curve on a CIE 1931 chromaticity coordinates chart, the main source comprises a first sub-main light source, a second sub-main light source, a third sub-main light source, and a fourth sub-main light source, the main light source is positioned in a middle of the illuminating device, and the first, second, third, and fourth sub-main light sources are arranged in a same plane and form a square array, and color temperatures of the first, second, third, and fourth sub-main light sources are different from each other.

2. The illuminating device of claim 1, wherein color temperature of mixed light of lights from the first, second, third, and fourth sub-main light sources is changeable by changing currents applied to the first, second, third, and fourth sub-main light sources.

3. The illuminating device of claim 1, the main light source, the blue light sources, the red light sources and the green light sources are arranged in a same plane.

4. The illuminating device of claim 1, wherein the illuminating device comprises four red light sources, four green light sources, and four blue light sources, the illuminating device is square, and four red light sources are located at four corners of the illuminating device.

5. The illuminating device of claim 4, wherein color temperature of mixed light of lights from the first, second, third, and fourth sub-main light sources is changeable by changing currents applied to the first, second, third, and fourth sub-main light sources.

6. The illuminating device of claim 4, the main light source, the blue light sources, the red light sources and the green light sources are arranged in a same plane and form a square array.

7. The illuminating device of claim 1, wherein the first sub-main light source emits light of 3500K color temperature, the second sub-main light source emits light of 4500K color temperature, the third sub-main light source emits light of 5500K color temperature, and the fourth sub-main light source emits light of 15000K color temperature.

8. The illuminating device of claim 7, wherein the illuminating device comprises four red light sources, four green light sources, and four blue light sources, the illuminating device is square, and four red light sources are located at four corners of the illuminating device.

9. The illuminating device of claim 8, wherein the main light source, the blue light sources, the red light sources and the green light sources are arranged in a same plane and form a square array.