Lighting apparatus

• US 8,814,396 B2
• Filed: 03/11/2011
• Issued: 08/26/2014
• Est. Priority Date: 03/29/2010
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: Ishida, Toshiyuki, Takahashi, Akimichi, Yamada, Hirokazu, Kawagoe, Makoto, Kuramochi, Hiroyuki
• Primary Examiner(s): COUGHLIN, ANDREW J
• Application Number:
  US13/045,812
• Publication Number:
  US 20110235335A1
• Time in Patent Office: 1,264 Days
• Field of Search: 362/33, 362/235, 362/241, 362/296.01, 362/297, 362/362
• US Class Current: 362/373
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: F21S 2/005 of modular construction
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 19/001 the light sources being semiconductors devices, e.g. LEDs
• CPC Class Codes: F21V 29/51 using condensation or evaporation of a fluid, e.g. heat pipes
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lighting apparatus according to an embodiment includes an optical unit and a body. The Optical unit includes a light emitting module that has a light emitting element, a reflector that controls distribution of light from the light emitting module, and a unit supporting member that supports the light emitting module and the reflector. A plurality of optical units are mounted to the apparatus body such that each optical unit is detachable. And the body includes an irradiating portion that has an opening through which the optical units irradiate light.

Claims

1. A lighting apparatus, comprising:

an optical unit comprising a light emitting module that includes a light emitting element mounted on a substrate, and a lens configured to control distribution of light from the light emitting module;

a unit mounting plate comprising a front surface on which the optical unit is disposed, and a back surface;

a power supply apparatus comprising a lighting circuit configured to cause the light emitting element to light; and

a body comprising an irradiation opening part and an opposite part opposite to the irradiation opening part, the irradiation opening part comprising an irradiating opening through which the optical unit irradiates light, and a translucent plate arranged in parallel with the unit mounting plate and arranged so as to cover the irradiating opening, wherein the opposite part comprises a surface opposing the back surface of the unit mounting plate, wherein the unit mounting plate is mounted to the irradiation opening part and wherein the power supply apparatus is mounted to the opposite part,

wherein a first distance between the front surface of the unit mounting plate and the translucent plate, at any point along a cross-section of the lighting apparatus, is less than a second distance between the back surface of the unit mounting plate and the surface of the body opposing the back surface, wherein the first and second distances are measured perpendicularly to the unit mounting plate, and

wherein the power supply apparatus is located in a space formed between the back surface of the unit mounting plate and the surface of the body opposing the back surface.

2. The lighting apparatus according to claim 1, wherein:

the unit mounting plate comprises a flange provided at an outer peripheral edge of the unit mounting plate, and

the flange is supported by a peripheral area around the translucent plate such that the unit mounting plate is attached to the irradiation opening part of the body.

3. The lighting apparatus according to claim 1, wherein the body includes a non-translucent portion extending substantially in parallel with and surrounding the translucent plate.