US 6,983,168 B2
Back light holder for a mobile phone
Wei-Chih Chen, Pingtung (Taiwan); and Chin-Kai Sun, Taipei (Taiwan)
Assigned to BenQ Corporation, (Taiwan)
Filed on Mar. 23, 2001, as Appl. No. 9/814,752.
Claims priority of application No. 89110317 A (TW), filed on May 26, 2000.
Prior Publication US 2001/0046857 A1, Nov. 29, 2001
Int. Cl. H04B 1/38 (2006.01)
U.S. Cl. 455—550.1 3 Claims
OG exemplary drawing
 
3. A method for assembling a holder onto a main printed circuit board of a mobile phone, said mobile phone comprising a keypad module, an LCM module, said holder, and a secondary printed circuit board, said main printed circuit board comprising a first portion corresponding to said keypad module and a second portion corresponding to said LCM module, a space being provided in said holder to accommodate said LCM module, a slit being formed at a predetermined location of said holder, said secondary printed circuit board carrying a plurality of LEDs to provide a back light source, said secondary printed circuit board comprising a first contact point and a second contact point, the method comprising the following steps:
(1) welding, by a surface mounting technology, a first connector and a second connector respectively onto a first predetermined location and a second predetermined location of said main printed circuit board;
(2) inserting said secondary printed circuit board within said slit of said holder;
(3) connecting said holder with said main printed circuit board in order to make said first contact point of said secondary printed circuit contact removably with said first connector, and to make said second contact point of said secondary printed circuit contact removably with said second connector;
(4) providing an electro-luminescent sheet substantially including a first portion and a second portion; and
(5) covering over said first portion of said main printed circuit board by said first portion of said electro-luminescent sheet, and disposing said second portion of said electro-luminescent sheet within said space of said holder.