Lighting device and semiconductor light source device

• US 8,258,527 B2
• Filed: 06/09/2009
• Issued: 09/04/2012
• Est. Priority Date: 06/09/2008
• Status: Active Grant

• Current Assignee: Stanley Electric Company Limited
• Original Assignee: Stanley Electric Company Limited
• Inventors: Sato, Masanori, Ebisutani, Takashi
• Primary Examiner(s): Tran, Thien F
• Application Number:
  US12/481,537
• Publication Number:
  US 20090302343A1
• Time in Patent Office: 1,183 Days
• Field of Search: 257/98, 257/E33.068
• US Class Current: 257/98
• CPC Class Codes: F21S 41/143 the main emission direction of the LED being parallel to the optical axis of the illuminating device
• CPC Class Codes: F21S 41/145 the main emission direction of the LED being opposite to the main emission direction of the illuminating device
• CPC Class Codes: F21S 41/148 the main emission direction of the LED being perpendicular to the optical axis
• CPC Class Codes: F21V 7/0016 on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05K 1/0274 Optical details, e.g. printed circuits comprising integral optical means H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42

Abstract

A small-sized lighting device can achieve wider light distribution patterns. The lighting device can include a semiconductor light emitting element configured to emit light from a first face and a second face thereof. A mounting substrate can be provided on which the semiconductor light emitting element is mounted. Light emitted from the second face can transmit through the mounting substrate, and a first optical system can be provided and configured to impart a first light distribution pattern to the light emitted from the first face of the semiconductor light emitting element. A second optical system can be provided and configured to impart a second light distribution pattern to light emitted from the second face of the semiconductor light emitting element.

Claims

1. A semiconductor light source device comprising:

a semiconductor light emitting element having a first face and a second face on an opposite side of the first face, the semiconductor light emitting element configured to emit light from the first face and the second face;

a mounting substrate located adjacent the semiconductor light emitting element such that light emitted from the second face is transmitted through the mounting substrate; and

a wavelength-conversion layer located adjacent at least one of the first face and the second face of the semiconductor light emitting element,

wherein the mounting substrate has a through hole at an area where the semiconductor light emitting element is mounted to the mounting substrate, and the wavelength-conversion layer is disposed within the through hole.