Back light for a liquid crystal display

• US 5,608,553 A
• Filed: 04/22/1996
• Issued: 03/04/1997
• Est. Priority Date: 07/24/1995
• Status: Expired due to Fees

• Current Assignee: Samsung Display Devices Co., Ltd. (Samsung SDI Company Limited)
• Original Assignee: Samsung Display Devices Co., Ltd. (Samsung SDI Company Limited)
• Inventors: Kim, Kyung-sik
• Primary Examiner(s): Pellman Gross, Anita
• Assistant Examiner(s): TON, MINH TOAN T
• Application Number:
  US08/635,649
• Time in Patent Office: 316 Days
• Field of Search: 359/45, 359/49, 315/169.3, 362/800, 313/512
• US Class Current: 349/61
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133612 Electrical details
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A back light for a liquid crystal display (LCD) includes a mold part. A first lead frame is installed on the inside of the mold part. In the first lead frame, the light emitting diodes are uniformly spaced apart from one another and each light emitting diode includes a chip. A first electrode is formed on one side of the chip and attached to the first lead frame. A second electrode is divided into two parts and formed on the other side of the chip. A plurality of conducting layers are respectively disposed between the light emitting diodes and each conducting layer is attached to the first lead frame. A plurality of connecting members connect each second electrode with each adjacent conducting layer. A second lead frame is installed on the inside of the mold part to be adjacent to the first lead frame. The second lead frame is connected to the adjacent second electrode by one of the connecting members.

Claims

1. A back light for a liquid crystal display (LCD) comprising:

a mold part;

a first lead frame which is installed on the inside of the mold part;

a plurality of light emitting diodes which are uniformly spaced apart from one another in the first lead frame, each light emitting diode including a chip;

a first electrode which is formed on one side of the chip and attached to the first lead frame, and a second electrode which is divided into two parts and formed on the other side of the chip;

a plurality of conducting layers which are respectively disposed between the light emitting diodes, each conducting layer being attached to the first lead frame;

a plurality of connecting members for connecting each second electrode with each adjacent conducting layer; and

a second lead frame which is installed on the inside of the mold part to be adjacent to the first lead frame and connected to the adjacent second electrode by one of the connecting members.