Light-guiding module and LED light source using the same

• US 7,997,758 B2
• Filed: 12/19/2008
• Issued: 08/16/2011
• Est. Priority Date: 05/23/2008
• Status: Expired due to Fees

• Current Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Original Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Inventors: Wu, Wei-Le, Lai, Cheng-Tien, Feng, Jin-Song, Zhang, Yi
• Primary Examiner(s): May; Robert
• Assistant Examiner(s): Lovell; Leah S
• Application Number:
  US12/340,488
• Publication Number:
  US 20090290342A1
• Time in Patent Office: 970 Days
• Field of Search: 362/249.02, 362/235, 362/248.11, 362/237, 362/238, 362/240, 362/241, 362/243, 362/296.01, 362/342, 362/341, 362/217.03, 362/290, 362/292, 362/325
• US Class Current: 362/235
• 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: F21V 17/12 by screwing
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

An LED light source includes an LED module and a light-guiding module fixed on the LED module. The LED module includes a printed circuit board and a plurality of LEDs. The light-guiding module includes a frame placed on the LED module and a plurality of light guiding units engaging with the frame. The frame defines an opening in a lower portion thereof to receive the LEDs of the LED module therein and a recess in an upper portion thereof and in communication with the opening. Each of the light guiding units has a base with two flanges respectively fittingly received in two cutouts of the recess of the frame so that the light guiding unit is movable along the recess until it faces a corresponding LED.

Claims

1. A light-guiding module for being fixed on an LED module to guide light emitted by a plurality of LEDs of the LED module, comprising:

a frame for being placed on the LED module, defining a void in a bottom portion thereof for receiving the LEDs of the LED module and a recess in an upper portion thereof and in communication with the void, the recess being shaped to have a narrow top mouth and a wide bottom portion, the recess having two undercuts at two sides of the wide bottom portion of the recess and slanting side walls in the recess from the narrow top mouth to the wide bottom portion so that the recess has a dovetailed profile; and

a plurality of light guiding units each comprising a base having two flanges extending outwardly and laterally from two opposite lateral sides thereof;

wherein the flanges of the base of each of the light guiding units are respectively received in the undercuts of the frame and movable along the recess to adjust a position of each of the light guiding units in the frame until each of the light guiding units faces a corresponding LED for reflecting and guiding light generated by the corresponding LED in a predetermined manner

wherein each of the light guiding units comprises four inclined sidewalls extending from the base and interconnected to each other to define a rectangular upper opening by upper ends thereof, the base defining a lower opening in communication with the upper opening; and

wherein the lower opening is smaller than the upper opening and in communication with the void of the frame.

2. An LED light source comprising:

an LED module comprising a printed circuit board and a plurality of LEDs mounted on the printed circuit board;

a light-guiding module fixed on the LED module to guide light emitted by the LEDs of the LED module, comprising;

a frame placed on the LED module and defining a void in a lower portion thereof to receive the LEDs of the LED module therein and a recess in an upper portion thereof and in communication with the void, the recess having two runners at two sides thereof, the recess having a narrow top mouth and a wide bottom portion to form slanting side walls in the recess from the narrow top mouth to the wide bottom portion so that the recess has a dovetailed profile; and

a plurality of light guiding units each having a base having two flanges extending outwardly and laterally from two opposite lateral sides thereof;

wherein the flanges of the base of each of the light guiding units are respectively received in the runners of the frame and movable along the recess to adjust a position of each of the light guiding units in the frame until each of the light guiding units faces a corresponding LED for reflecting and guiding light generated by the corresponding LED in a predetermined manner; and

wherein each of the light guiding units comprises four inclined sidewalls extending from the base and interconnected to each other to define a rectangular upper opening by upper ends thereof, the base defining a lower opening in communication with the upper opening.