LCX028BMT Datasheet, PDF (20/26 Pages) Sony Corporation – 4.6cm (1.8-inch) Black-and-White LCD Panel

LCX028BMT
2. LCD Panel Operations
[Description of basic operations]
• A vertical driver, which consists of vertical shift registers, enable-gates and buffers, applies a selected pulse
to every 1024 gate lines sequentially in a single horizontal scanning period. (SXGA mode)
• A horizontal driver, which consists of horizontal shift registers, gates and CMOS sample-and-hold circuits,
applies selected pulses to every 1280 signal electrodes sequentially in a single horizontal scanning period.
These pulses are used to supply the sampled video signal to the row signal lines.
• Vertical and horizontal shift registers address one pixel, and then Thin Film Transistors (TFTs; two TFTs) turn
on to apply a video signal to the dot. The same procedures lead to the entire 1024 × 1280 dots to display a
picture in a single vertical scanning period.
• The data and video signals shall be input with the 1H-inverted system.
[Description of operating mode]
This LCD panel can change the active area by displaying a black frame to support various computer or video
signals. The active area is switched by VB1, VB2 and BLK. However, the center of the screen is not changed.
The active area setting modes are shown below.
HB
VB
BLK
Screen aspect ratio
H
H
H
L
H
∗1
L
L
∗1
5:4
1280 × 1024
4:3
1280 × 960
16:9
1280 × 720
∗1 _{Input BLK pulse (refer to drive waveform and vertical blanking period of black frame mode).}
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