Light source system

• US 6,939,027 B2
• Filed: 07/08/2003
• Issued: 09/06/2005
• Est. Priority Date: 07/09/2002
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Topcon
• Original Assignee: Kabushiki Kaisha Topcon
• Inventors: Harumoto, Yuko
• Primary Examiner(s): Husar, Stephen
• Assistant Examiner(s): Sawhney, Hargobind S.
• Application Number:
  US10/615,224
• Publication Number:
  US 20040066651A1
• Time in Patent Office: 791 Days
• Field of Search: 362/800, 362/544, 362/545, 362/475, 362/507, 362/538, 362/227, 362/230, 362/231, 362/236, 362/240, 362/334, 362/347, 362/350, 362/361, 362/249, 362/244, 362/245, 362/555, 359/623, 359/626
• US Class Current: 362/336
• CPC Class Codes: H04N 9/315 Modulator illumination systems general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A light source system, including light emitting diodes with different light emitting colors arranged at a predetermined ratio of quantities of diodes, the ratio of quantities of diodes is determined based on light emitting status for each diode of each color so that a projected light has chromaticity of a desired color, and total quantity of the light emitting diodes is set so as to satisfy the ratio of quantities of diodes.

Claims

1. A light source system, comprising two or more red color light emitting diodes;

two or more blue color light emitting diodes;

two or more green color light emitting diodes;

wherein said red color emitting diodes, said blue color emitting diodes and said green color emitting diodes are arranged at a predetermined ratio of quantities of diodes on a spherical curved surface;

a mixer for projecting two or more incident monochromatic lights as a light mixed with said monochromatic lights;

a cone shaped light source cover for covering said light emitting diodes and for mounting said mixer at a vertex of said light source cover; and

a light emission controller for controlling the number of light emitting diodes of each color that are turned on.

2. A light source system according to claim 1, wherein said spherical curved surface where said light emitting diodes are arranged at the predetermined ratio of quantities of diodes is elliptical surface of rotation or a parabolic surface of rotation.

3. A light source system according to claim 1, wherein said light emitting diodes are arranged on concentric multiple circles, wherein light emitting diodes with different light emitting colors are arranged.

4. A light source system according to claim 1, wherein said light emitting diodes are arranged on concentric multiple circles, wherein light emitting diodes of the same light emitting color are arranged on each circle.

5. A light source system according to claim 1, wherein said light emission controller controls lightness by controlling the number of diodes that are turned-on at the predetermined ratio of quantities and said light emission controller controls color by controlling the number of light emitting diodes that are turned-on.

6. A light source system according to claim 1, further comprising a lens unit which has condenser lenses, wherein each of said wherein each of said condenser lenses is opposite to each of said light emitting diodes arranged on said spherical curved surface on a 1:

1 basis, and said lens unit converges light beams to said mixer.