ILLUMINATING APPARATUS AND ILLUMINATING METHOD THEREOF

• US 20110316443A1
• Filed: 12/14/2010
• Published: 12/29/2011
• Est. Priority Date: 06/29/2010
• Status: Abandoned Application

• Current Assignee: National Tsing Hua University
• Original Assignee: National Tsing Hua University
• Inventors: Jou, Jwo-Huei, Wang, Hsi-Ching
• Application Number:
  US12/967,363
• Publication Number:
  US 20110316443A1
• Time in Patent Office: Days
• US Class Current: 315/294
• CPC Class Codes: H05B 45/20 Controlling the colour of the light

Abstract

The present invention discloses an illuminating apparatus and an illuminating method thereof. The illuminating apparatus comprises a first electrode, a first organic light emitting diode, a second electrode, a second organic light emitting diode and a third electrode. The first and second organic light emitting diodes emit lights with a first chromaticity and a second chromaticity respectively. The illuminating apparatus further comprises a control module, and the control module can supply a first voltage, a second voltage and a third voltage to the first, second and third electrodes so as to emit a sun-like light and adjust the color temperature or the brightness of the light.

Claims

1. An illuminating apparatus, comprising:

a first electrode;

a first organic light emitting diode, disposed on the first electrode and emitting lights with a first chromaticity;

a second electrode, disposed on the first organic light emitting diode;

a second organic light emitting diode, disposed on the second electrode and emitting lights with a second chromaticity; and

a third electrode, disposed on the second organic light emitting diode;

wherein, the first electrode has a first voltage, the second electrode has a second voltage and the third electrode has a third voltage so the illuminating apparatus emits an imitative natural light;

the chromaticity of the imitative natural light is matched with a sun-light trajectory on a color coordinate by adjusting a plurality of voltage difference between the first voltage, the second voltage and the third voltage.

2. The illuminating apparatus of claim 1, wherein the illuminating apparatus further comprises a control module, and the control module is electrically connected to the first electrode, the second electrode and the third electrode, and can supply the first voltage, the second voltage and the third voltage to the first, second and third electrodes respectively, so as to control illuminating apparatus to emit the imitative natural light and adjust the color temperature, the brightness of the imitative natural light.

3. The illuminating apparatus of claim 2, wherein the first organic light emitting diode and the second organic light emitting diode is a fluorescent material or a phosphorescence material.

4. The illuminating apparatus of claim 3, wherein the first chromaticity and the second chromaticity comprises red light, blue light, green light, orange light, yellow light or white light.

5. The illuminating apparatus of claim 4, wherein the plurality of voltage difference comprises:

a first voltage difference, which is the difference between the first voltage and the second voltage;

a second voltage difference, which is the difference between the second voltage and the third voltage;

when the difference between the position of the imitative natural light on the color coordinate and the position of the first chromaticity on the color coordinate is smaller than the difference between the position of the imitative natural light on the color coordinate and the position of the second chromaticity on the color coordinate, the control module sets the first voltage difference larger than the second voltage difference.

6. The illuminating apparatus of claim 5, wherein when the difference between the position of the imitative natural light on the color coordinate and the position of the first chromaticity on the color coordinate is larger than the difference between the position of the imitative natural light on the color coordinate and the position of the second chromaticity on the color coordinate, the control module sets the first voltage difference smaller than the second voltage difference.

7. The illuminating apparatus of claim 5, wherein when the difference between the position of the imitative natural light on the color coordinate and the position of the first chromaticity on the color coordinate is equal to the difference between the position of the imitative natural light on the color coordinate and the position of the second chromaticity on the color coordinate, the control module sets the first voltage difference equal to the second voltage difference.

8. An illuminating method, applicable to an illuminating apparatus, the illuminating apparatus comprising at least a first electrode, a first organic light emitting diode, a second electrode, a second organic light emitting diode and a third electrode, the illuminating method comprising the following steps of:

giving the first electrode a first voltage;

giving the second electrode a second voltage, so the first organic light emitting diode emitting light according to a first chromaticity;

giving the third electrode a third voltage, so the second organic light emitting diode emitting light according to a second chromaticity; and

emitting an imitative natural light by the illuminating apparatus and adjusting the color temperature or the brightness of the imitative natural light at same time by adjusting a plurality of voltage difference between the first voltage, the second voltage and the third voltage;

wherein, the chromaticity of the imitative natural light is matched with a sun-light trajectory on a color coordinate by adjusting the plurality of voltage difference between the first voltage, the second voltage and the third voltage.

9. The illuminating method of claim 8, wherein the illuminating apparatus further comprises a control module, and the control module is electrically connected to the first electrode, the second electrode and the third electrode, and can supply the first voltage, the second voltage and the third voltage to the first, second and third electrodes respectively, so as to control illuminating apparatus to emit the imitative natural light and adjust the color temperature, the brightness of the imitative natural light.

10. The illuminating method of claim 9, wherein the first organic light emitting diode and the second organic light emitting diode is a fluorescent material or a phosphorescence material.

11. The illuminating method of claim 10, wherein the first chromaticity and the second chromaticity comprises red light, blue light, green light, orange light, yellow light or white light.

12. The illuminating method of claim 11, wherein the plurality of voltage difference comprises:

a first voltage difference, which is the difference between the first voltage and the second voltage;

a second voltage difference, which is the difference between the second voltage and the third voltage;

when the difference between the position of the imitative natural light on the color coordinate and the position of the first chromaticity on the color coordinate is smaller than the difference between the position of the imitative natural light on the color coordinate and the position of the second chromaticity on the color coordinate, the control module sets the first voltage difference larger than the second voltage difference.

13. The illuminating method of claim 12, wherein when the difference between the position of the imitative natural light on the color coordinate and the position of the first chromaticity on the color coordinate is larger than the difference between the position of the imitative natural light on the color coordinate and the position of the second chromaticity on the color coordinate, the control module sets the first voltage difference smaller than the second voltage difference.

14. The illuminating method of claim 12, wherein when the difference between the position of the imitative natural light on the color coordinate and the position of the first chromaticity on the color coordinate is equal to the difference between the position of the imitative natural light on the color coordinate and the position of the second chromaticity on the color coordinate, the control module sets the first voltage difference equal to the second voltage difference.