Lighting apparatus with filter

• US 7,626,327 B2
• Filed: 03/01/2005
• Issued: 12/01/2009
• Est. Priority Date: 03/05/2004
• Status: Active Grant

• Current Assignee: Yanchers INC.
• Original Assignee: Nichia Corporation
• Inventors: Kawakami, Yoichi, Shimada, Junichi, Yamada, Motokazu
• Primary Examiner(s): Hines; Anne M
• Application Number:
  US11/067,891
• Publication Number:
  US 20050194876A1
• Time in Patent Office: 1,736 Days
• Field of Search: 313/110, 313498-512
• US Class Current: 313/501
• CPC Class Codes: A61B 1/0638 providing two or more wavelengths
• CPC Class Codes: A61B 1/0653 with wavelength conversion
• CPC Class Codes: A61B 1/0684 using light emitting diodes [LED]
• CPC Class Codes: A61B 1/07 using light-conductive means, e.g. optical fibres
• CPC Class Codes: A61B 1/267 for the respiratory tract, e.g. laryngoscopes, bronchoscopes
• CPC Class Codes: A61B 1/307 for the urinary organs, e.g. urethroscopes, cystoscopes
• CPC Class Codes: A61B 17/0206 with antagonistic arms as supports for retractor elements
• CPC Class Codes: A61B 2090/502 Headgear, e.g. helmet, spectacles
• CPC Class Codes: A61B 90/36 Image-producing devices or illumination devices not otherwise provided for
• CPC Class Codes: A61B 90/50 Supports for surgical instruments, e.g. articulated arms

Abstract

A lighting apparatus which improves identification of living body tissues, and is suitable for medical lighting. In the lighting apparatus, the light output in a range of wavelength 525 to 590 nm is not greater than ⅕ of the light output in a range of wavelength 380 to 780 nm corresponding to visible light components. The peak wavelength of a blue or bluish green light component included in the output light is in a range of 430 to 520 nm, and the peak wavelength of a red light component is not less than 600 nm. A green light component has the peak in a range of wavelength 520 to 590 nm, its spectral half-value width is not greater than 70 nm, and the light amount of at least the green light component can be independently adjusted.

Claims

1. A lighting apparatus capable of emitting white light, the lighting apparatus comprising:

a module capable of emitting output light;

a cord; and

a controller portion connected to the module via the cord to supply electric power for driving the light emitting elements,

wherein the module comprises;

a first light emitting diode for emitting blue or bluish green light having a peak wavelength in a range of 480 nm to 510 nm; and

a second light emitting diode for emitting red light having a peak wavelength in a range of 610 nm to 670 nm,

wherein the controller portion controls electric current so as to output the light in which a range of wavelength 525 nm to 590 nm of a partial output light is not greater than ⅕

of the partial light output in a range of wavelength 380 nm to 780 nm corresponding to visible light components, and

wherein the peak of the first light emitting diode is substantially greater than that of the second light emitting diode.

2. The lighting apparatus according to claim 1, wherein a green light component included in the output light has a peak in a range of wavelength 520 to 590 nm, its spectral half-value width is not greater than 70 nm, and the light amount of at least the green light component can be independently adjusted.

3. The lighting apparatus according to claim 1, wherein the first light emitting means comprises an LED configured and arranged so that its light output can be independently adjusted.

4. The lighting apparatus according to claim 3, wherein the LED includes a wavelength conversion member.

5. The lighting apparatus according to claim 4, wherein the wavelength conversion member is a filter.

6. The lighting apparatus according to claim 4, wherein the wavelength conversion member is a phosphor.

7. A retractor having a lighting apparatus according to claim 1.

8. An endoscope having a lighting apparatus according to claim 1.

9. The lighting apparatus according to claim 1, wherein the first and second light emitting diodes do not include a liquid or gel.

10. A lighting apparatus capable of emitting white light, the lighting apparatus comprising:

a module capable of emitting output light;

a cord; and

a controller portion connected to the module via the cord to supply electric power for driving the light emitting elements,

wherein the module comprises;

a first light emitting diode for emitting blue or bluish green light having a peak wavelength in a range of 480 nm to 510 nm; and

a second light emitting diode for capable of emitting red light having a peak wavelength in a range of 610 nm to 670 nm,

wherein the controller is capable of controlling electric current so as to output the light of which a range of wavelength 525 nm to 590 nm of a partial output light is not greater than 1/10 of the partial light output in a range of wavelength 380 nm to 780 nm corresponding to visible light components, and

wherein the peak of the first list emitting diode is substantially greater than that of the second light emitting diode.

11. A lighting apparatus capable of emitting white light, the lighting apparatus comprising:

a module capable of emitting output light;

a cord; and

a controller portion connected to the module via the cord to supply electric power for driving the light emitting elements,

wherein the module comprises;

a first light emitting diode for emitting blue or bluish green light having a peak wavelength in a range of 480 nm to 510 nm;

a second light emitting diode for emitting red light having a peak wavelength in a range of 610 nm to 670 nm; and

a third light emitting diode for emitting green light having a peak wavelength in a range of 520 nm to 590 nm,

wherein spectral half-value width of the green light is not greater than 70 nm, and the light amount of at least the green light component is independently adjustable, and

wherein the peak of the first light emitting diode is substantially greater than that of the second light emitting diode.

12. The lighting apparatus according to claim 11, wherein the apparatus can emit light containing only the green light component.