Light source module

• US 7,850,335 B2
• Filed: 10/19/2007
• Issued: 12/14/2010
• Est. Priority Date: 05/25/2007
• Status: Expired due to Fees

• Current Assignee: Young Optics, Inc. (Coretronic Corporation)
• Original Assignee: Young Optics, Inc. (Coretronic Corporation)
• Inventors: Cheng, Chu-Ming, Hsu, Chih-Lu
• Primary Examiner(s): Shea; Sandra L O
• Assistant Examiner(s): Zettl; Mary
• Application Number:
  US11/875,244
• Publication Number:
  US 20080291672A1
• Time in Patent Office: 1,152 Days
• Field of Search: 362/230, 362/231, 362/293, 362/612, 362/249.02, 362/249.05, 362/800
• US Class Current: 362/231
• CPC Class Codes: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: H04N 9/3158 for controlling the spectrum

Abstract

A light source module including a plurality of first point light sources, a plurality of second point light sources, and a plurality of third point light sources is provided. The dominant wavelengths of lights provided by the first point light sources are within a wavelength range of a first color light, and at least two of the first point light sources emit light with different dominant wavelengths. The dominant wavelengths of lights provided by the second point light sources are within a wavelength range of a second color light, and at least two of the second point light sources emit light with different dominant wavelengths. The dominant wavelengths of lights provided by the third point light sources are within a wavelength range of a third color light, and at least two of the third point light sources emit light with different dominant wavelengths.

Claims

1. A light source module, comprising:

a plurality of first point light sources, the dominant wavelengths of lights provided by the first point light sources being within a wavelength range of a first color light, and at least two of the first point light sources emitting lights with different dominant wavelengths;

a plurality of second point light sources, the dominant wavelengths of lights provided by the second point light sources being within a wavelength range of a second color light, and at least two of the second point light sources emitting lights with different dominant wavelengths; and

a plurality of third point light sources, the dominant wavelengths of lights provided by the third point light sources being within a wavelength range of a third color light, and at least two of the third point light sources emitting lights with different dominant wavelengths;

wherein when an electrical current introduced to the first point light sources rises or temperatures of the first point light sources rise, the dominant wavelengths of lights provided by a portion of the first point light sources have a blue shift while the dominant wavelengths of lights provided by the remaining first point light sources have a red shift.

2. The light source module of claim 1, wherein the first color light, the second color light and the third color light are a red light, a green light and a blue light respectively.

3. The light source module of claim 2, wherein the first point light sources are divided into two types, and the dominant wavelengths of lights provided by the first point light sources are λ

₁₁ and λ

₁₂ respectively, 4 nm≦

|λ

₁₂-λ

₁₁|≦

40 nm.

4. The light source module of claim 2, wherein the first point light sources are divided into three types, and the dominant wavelengths of lights provided by the first point light sources are λ

₁₁, λ

₁₂ and λ

₁₃, 4 nm≦

|λ

₁₂-λ

₁₁|≦

40 nm and 4 nm≦

|λ

₁₃-λ

₁₂|≦

40 nm.

5. The light source module of claim 2, wherein the second point light sources are divided into two types, and the dominant wavelengths of lights provided by the second point light sources are λ

₂₁ and λ

₂₂ respectively, 4 nm≦

|λ

₂₂-λ

₂₁|≦

20 nm.

6. The light source module of claim 2, wherein the second point light sources are divided into three types, and the dominant wavelengths of lights provided by the second point light sources are λ

₂₁, λ

₂₂ and λ

₂₃, 4 nm≦

|λ

₂₂-λ

₂₁|≦

20 nm and 4 nm≦

|λ

₂₃-λ

₂₂|≦

20 nm.

7. The light source module of claim 2, wherein the third point light sources are divided into two types, and the dominant wavelengths of lights provided by the third point light sources are λ

₃₁ and λ

₃₂ respectively, 4 nm≦

|λ

₃₂-λ

₃₁|≦

30 nm.

8. The light source module of claim 2, wherein the third point light sources are divided into three types, and the dominant wavelengths of lights provided by the third point light sources are λ

₃₁, λ

₃₂ and λ

₃₃, 4 nm≦

|λ

₃₂-λ

₃₁|≦

30 nm and 4 nm≦

|λ

₃₃-λ

₃₂|≦

30 nm.

9. The light source module of claim 1, wherein when an electrical current introduced to the second point light sources rises or temperatures of the second point light sources rise, the dominant wavelengths of lights provided by a portion of the second point light sources have a blue shift while the dominant wavelengths of lights provided by the remaining second point light sources have a red shift.

10. The light source module of claim 9, wherein when an electrical current introduced to the third point light sources rises or temperatures of the third point light sources rise, the dominant wavelengths of lights provided by a portion of the third point light sources have a blue shift while the dominant wavelengths of lights provided by the remaining third point light sources have a red shift.

11. The light source module of claim 1, further comprising a circuit board, the first point light sources, the second point light sources and the third point light sources being disposed on the circuit board.

12. The light source module of claim 1, further comprising a light-combination unit for combining lights provided by the first point light sources, the second point light sources and the third point light sources into an illumination beam.

13. The light source module of claim 1, further comprising a light box, the first point light sources, the second point light sources and the third point light sources being disposed on a bottom of the light box.

14. The light source module of claim 13, further comprising a diffusion plate disposed at a light-emitting section of the light box.

15. The light source module of claim 1, further comprising a light guide plate having at least one incident surface, the first point light sources, the second point light sources and the third point light sources being disposed adjacent to the incident surface.

16. A light source module, comprising at least a first set of a plurality of point light sources, a dominant wavelength of lights provided by each of the point light sources in the first set being within a wavelength range of a first monochromatic light, at least two of the point light sources in the first set emitting lights with different dominant wavelengths, wherein when an electrical current introduced to the point light sources in the first set rises or temperatures of the point light sources in the first set rise, the dominant wavelengths of lights provided by a portion of the point light sources in the first set have a blue shift while the dominant wavelengths of lights provided by the remaining point light sources in the first set have a red shift.

17. The light source module of claim 16, wherein the monochromatic light is a red light, an orange light, a yellow light, a green light, a blue light, an indigo light or a purple light.

18. The light source module of claim 16, further comprising a second set of a plurality of point light sources, a dominant wavelength of lights provided by each of the point light sources in the second set being within a wavelength range of a second monochromatic light;

at least two of the point light sources in the second set emitting lights with different dominant wavelengths, and the first monochromatic light being different from the second monochromatic light.

19. The light source module of claim 18, wherein when an electrical current introduced to the point light sources in the second set rises or temperatures of the point light sources in the second set rise, the dominant wavelengths of lights provided by a portion of the point light sources in the second set have a blue shift while the dominant wavelengths of lights provided by the remaining point light sources in the second set have a red shift.