Light-emitting module and lighting apparatus

• US 9,273,838 B2
• Filed: 08/16/2012
• Issued: 03/01/2016
• Est. Priority Date: 02/14/2008
• Status: Active Grant

• 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: Tanaka, Toshiya, Saito, Akiko, Kawano, Hitoshi
• Primary Examiner(s): Han, Jason Moon
• Application Number:
  US13/587,225
• Publication Number:
  US 20120306352A1
• Time in Patent Office: 1,293 Days
• Field of Search: 362/249.02, 362/247
• US Class Current: 1/1
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21S 8/02 of recess-mounted type, e.g. downlighters specially adapted for vehicle exteriors F21S41/00-F21S45/00
• CPC Class Codes: F21V 23/005 the substrate is supporting also the light source
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• 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 29/89 Metals
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05K 1/181 associated with surface mounted components

Abstract

A light-emitting module may be configured to have improved light emission efficiency and light distribution characteristics. A light-emitting module may include a substrate having a front surface side as a component mounting surface and a rear surface side as a flat heat dissipating surface, a plurality of light-emitting elements arranged in a manner protruding at a central portion of the component mounting surface of the substrate. The light-emitting elements may radiate light at least in an upper surface direction and in a direction along the component mounting surface. The module may further include one or more lighting circuit components electrically connected to the light emitting elements by a wiring pattern arranged on the substrate and which is arranged closer to the peripheral edge side of the substrate than the light emitting elements on the component mounting surface of the substrate, and a connector for power supply connection.

Claims

1. A lighting device comprising:

a mounting surface having a central portion, wherein a plurality of through-holes are formed in the mounting surface;

at least one light emitting element each comprising an LED chip and a translucent resin sealing the LED chip, the at least one light emitting element mounted in a central portion of the mounting surface such that the plurality of through-holes are closer to a peripheral edge of the mounting surface than all light emitting elements mounted on the mounting surface;

a connector mounted on the mounting surface and mounted closer to the peripheral edge of the mounting surface than the plurality of through-holes, the connector configured to connect with a power supply disposed separately from the mounting surface;

at least one lighting circuit component mounted on the mounting surface and mounted closer to the peripheral edge of the mounting surface than the all light emitting elements; and

a reflector having a curved surface of a truncated cone shape, the reflector further having a single mounting opening and a single radiating opening at respective ends of the curved surface of the truncated cone shape, and the reflector mounted on the mounting surface via the through-holes,

wherein the single mounting opening separates all light emitting elements from the connector and the at least one lighting circuit component, and wherein the at least one lighting circuit component is mounted on the mounting surface such that, in a direction parallel to the mounting surface, the at least one lighting circuit component is positioned closer to a center of the mounting surface than a circumferential edge of the radiating opening.

2. The lighting device of claim 1, wherein the at least one light emitting elements includes a plurality of light emitting elements.

3. The lighting device of claim 1, wherein three through-holes are formed in the mounting surface.

4. The lighting device of claim 3, wherein the through-holes extend through an entire depth of a mounting body corresponding to the mounting surface.

5. The lighting device of claim 1, wherein the plurality of through-holes are formed closer to a center of the mounting surface than a position at which the at least one lighting circuit component is mounted.

6. The lighting device of claim 1, wherein an inner circumferential edge of the single reflector mounting opening contacts the mounting surface.

7. The lighting device of claim 1, wherein no portion of the reflector is disposed between, in a radial direction of the reflector, any two light emitting elements.