READING LAMP OR SPOTLIGHT

• US 20110164429A1
• Filed: 12/17/2010
• Published: 07/07/2011
• Est. Priority Date: 06/21/2008
• Status: Active Grant

• Current Assignee: Airbus Operations GmbH (Airbus SE)
• Original Assignee: Airbus Operations GmbH (Airbus SE)
• Inventors: GINDELE, Frank, BUDINGER, Tilo, HEYM, Detlef
• Granted Patent: US 8,439,533 B2
• Time in Patent Office: Days
• US Class Current: 362/471
• CPC Class Codes: B60Q 3/44 Spotlighting, e.g. reading lamps
• CPC Class Codes: B60Q 3/76 for spotlighting, e.g. reading lamps spotlighting on or for specific fittings B60Q3/20; spotlighting in mass transit vehicles B60Q3/44
• CPC Class Codes: B60Q 3/85 for manual control of the light, e.g. of colour, orientation or intensity
• CPC Class Codes: B64D 2011/0053 Cabin passenger reading lights
• CPC Class Codes: F21K 9/69 Details of refractors forming part of the light source
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21W 2106/00 Interior vehicle lighting devices
• CPC Class Codes: F21W 2107/30 for aircraft
• CPC Class Codes: F21Y 2113/00 Combination of light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A reading device, such as a reading lamp or reading spotlight, is provided for use in a vehicle, such as a motor vehicle with immovable properties or ships. The reading device for example can be used in passenger cabins and/or cockpits of aircraft. The reading device includes, but is not limited to an LED light source with a color temperature that can be adjusted with the color “warm-white” to “cold-white”, a primary optics or lens advantageously designed as a converging lens, and a secondary optics or lens to focus the light emitted by the light source onto a surface, such as a reading plane to be illuminated.

Claims

1. A reading device for use in a vehicle, comprising:

an LED light source comprising a color temperature adjustable between a warm-white color to and a cold-white color and adapted to emit a light, the LED light source comprising;

a first high-power LED adapted to emit a warm-white light;

a second high-power LED adapted to emit a cold-white light;

a third high-power LED adapted to emit a red light; and

a fourth high-power LED adapted to emit a LED cyan light of a predetermined color characteristic,

wherein color temperatures of the first high-power LED, the second high-power LED, the third high-power LED, and the fourth high-power LED are adapted to determine a color of the light,

wherein a color location of the first high-power LED, the second high-power LED, the third high-power LED, and the fourth high-power LED, within a CIE diagram form corner points of a plane figure having art least four sides and angles that includes a Planck curve;

a primary optics; and

a micro-lens downstream from the primary optics at a predetermined distance adapted to focus the light onto a surface, the micro-lens further adapted to mix a light spectra emitted from the LED light source to generate a substantially white light that approximates thermal radiators and deflects the light onto the surface.

2. The reading device according to claim 1, wherein the color temperatures of the first high-power LED, the second high-power LED, the third high-power LED, and the fourth high-power LED are adapted to determine the color of the light relative to the Planck curve in a CIE diagram.

3. The reading device according to claim 1, wherein the color temperatures of the first high-power LED, the second high-power LED, the third high-power LED, and the fourth high-power LED are adapted to determine the color of the light with wavelengths to achieve a high color rendering with a CRI color rendering index of between approximately 80 and approximately 100.

4. The reading device according to claim 1, wherein the reading device is a reading lamp.

5. The reading device according to claim 1, wherein the reading device is a reading spotlight.

6. The reading device according to claim 1, wherein the vehicle is an aircraft

7. The reading device according to claim 6, wherein the reading device is used in a passenger cabin of the aircraft.

8. The reading device according to claim 6, wherein the reading device is used in a cockpit of the aircraft.

9. The reading device according to claim 1, wherein the plane figure is a color quadrangle.

10. The reading device according to claim 1, wherein the plane figure is a color polygon.

11. The reading device according to claim 1, wherein the primary optics is a lens

12. The reading device according to claim 11, wherein the lens is a converging lens.

13. The reading device according to claim 12, wherein the surface is a reading plane.

14. The reading device according to claim 1, wherein the color temperatures of the first high-power LED, the second high-power LED, the third high-power LED, and the fourth high-power LED are substantially identical.

15. The reading device according to claim 1, wherein the color temperatures of the first high-power LED, the second high-power LED, the third high-power LED, and the fourth high-power LED are varied.

16. The reading device according to claim 1, wherein the predetermined color characteristic is a color temperature.

17. The reading device according to claim 1, wherein the predetermined color characteristic is a color wavelength.

18. The reading device according to claim 1,

wherein the micro-lens comprises a first individual micro-lens and a second individual micro-lens,

wherein the first individual micro-lens is used to mix the light emitted by the LED light source, and

wherein the second individual micro-lens is adapted to deflect the light onto the surface.

19. The reading device according to claim 1, wherein the micro-lens is adapted to influence a shape of a zone to be illuminated in order to confine an illuminated area.

20. The reading device according to claim 1, further comprising a second micro-lenses adapted to provided different emission angles of the light exiting the micro-lens.