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Bottom lighting module

a bottom light and module technology, applied in the field of bottom lighting modules, can solve the problems of uneven reflective led light, high cost of milling machine to fabricate holes, and affecting the light efficiency of the back light modul

Active Publication Date: 2007-02-22
OPTRONIC SCI LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, using a mill machine to fabricate the holes 103 is usually expensive.
In addition, the connection way by screwing causes another drawback that affects light efficiency of the back light module.
However, the slit area around the screw 19 makes the reflection sheet 18 area piece-wise and would make the reflective LED light uneven.

Method used

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Experimental program
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Embodiment Construction

[0026] Referring to FIG. 3, an exploded view of a preferred bottom lighting module according to the present invention is shown. The bottom lighting module 2 comprises a PCB 20, a reflection sheet 22 and a plurality of LEDs 24. The PCB 20 has a first face 201, a second face 202 opposing to the first face 201, and at least a opening 203 connecting spatially the first face 201 and the second face 202.

[0027] The LEDs 24 can be connected on the PCB 20. The reflection sheet 22 adhered to the first face 201 of the PCB 20 has a plurality of holes 221 to expose respective LEDs 24. As shown, each opening 203 is accounted for at least two holes 221 of the reflection sheet 22 (three holes 221 for each opening 22 in FIG. 3).

[0028] Each LED 24 disposed in one respective hole 221 and the corresponding opening 203 comprises a light-emitting portion 241 and an LED-base 242. The light-emitting portion 241 is located on the first face 201 of the PCB 20. Due to the LED-base 242 is the major heat sour...

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PUM

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Abstract

A bottom lighting module comprises a PCB, a reflection sheet and plurality of light-emitting diodes (LEDs). The PCB has a first face, a second face opposing to the first face and a opening connecting spatially the first face and the second face. The reflection sheet is disposed on the first face and has a plurality of holes. At least two holes are located in a range of the opening. Each LED is disposed in one hole and the corresponding opening. Each LED comprises a light-emitting portion and a base. The base further comprises at least two electrodes connected to the second face of the PCB.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a bottom lighting module, more particularly to an LED light source of the bottom lighting module. BACKGROUND OF THE INVENTION [0002] Nowadays, the liquid crystal displays (LCD) are generally used in all kind of information displays. The main structure of the LCD can comprise a panel module and a back light module. The panel module roughly comprises an Indium Tin Oxide (ITO) conductive glass substrate, a liquid crystal layer, an alignment film, color filters, polarizing sheets and a driver integrated circuit. The back light module mainly comprises a light source, a light guide plate, a prism sheet, a reflection sheet, a diffusion sheet and various optical sheets. The back light module is to provide the light source to the LCD. Generally, the performance of the LCD reflects the quality of every individual element. For example, the back light module plays an important role in the screen's brightness, intensity, contrast and...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F21S13/14
CPCF21K9/00G02F2001/133628H05K1/021H05K1/182H05K3/0061G02F1/133308F21V19/0035F21V19/0055F21V29/677F21V29/763F21V29/74H05K2201/10106G02F1/133628
Inventor CHOU, SHEN-HONG
Owner OPTRONIC SCI LLC