Friday, March 18, 2011

Terminology Explained


Flex: Also called zebra strip, flex is a flexible strip of silicon or rubber material with embedded thin strips of wires that conduct electricity. It comes in a number of colors like white, orange, brown etc. Here is a picture of a typical flex cable:

                                                   
                       This is one of a pair of zebra strips form a Samsung LCD module (400WTSR4LV0.0)


Pixel: Pixel is derived from the amalgamation of two words, Picture and Element. It refers to one of the thousands of little dots that form the display or graphics on the LCD panel.




Flip-Chip: This is a flexible circuitry usually carrying a chip which is the the pixel driver. Flip-chips that control vertical pixels usually have one end attached to the LCD glass while the other end is attached to the slim PCB that is part and on top of the LCD panel. But some flip-chips that control horizontal pixels have only one attachable end, and attach only to the LCD glass. Below are photos of what I am trying to describe.



                                                      
                                                       A Flip-Chip Attached to a slim PCB
                                         (Underside shown; the black, rectangular part is the chip)



                                      
                                                             The top part of a Flip-Chip

There can be as many as 12 vertical- and 4 horizontal-pixel flip-chips controlling an LCD panel's picture elements. Now in  some LCD panels, one (or two in the case of larger panels like 40" or more) among these flip-chips is probably most vital because it serves as a passage of energy for the horizontal-pixel flip-chips. Pictures of all this I will show as time progresses.

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