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I
System of LCD Display
5 System of LCD Display
5-1 Dot-Matrix System
LCD displays have two drive systems, Segment and Dot-Matrix. The Dot-Matrix system is used for LCD
television displays.
The picture elements (pixels) of the display unit are arranged horizontally (X line) and vertically (Y row)
by this Dot-Matrix system, and various characteristics and figures can be displayed.
Fig. 12 shows a matrix of "X x Y = 10 (pixels)" with the character "Y" displayed. In this Dot-Matrix system,
by making the size of a pixel smaller and increasing the whole number of pixels, the big screen with fine
character or picture becomes possible.
With the present liquid crystal manufacture technology, the number of pixels per inch has reached
200ppi*, and very high definition screen display is possible. Moreover, the number of pixels of an LCD
display panel corresponding to bigger screen sizes can be specified and manufactured. For example, the
number of pixels of the SXGA* panel is about 1,300,000 (1,280 x 1,024 = 1,310,720 pixels).
✐
ppi: pixel per inch
✐
SXGA: Super eXtended Graphics Array
Y
X
-14-
In colorization of LCD panel,
one pixel consists of 3 RGB
R G B
dots (sub-pixels).
A character or a figure is
displayed by making the
pixel of each X and Y inter-
section turn on (or off).
Fig. 12
Dot-Matrix System
Training Manual Principle of LCD
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