ACX302 SONY [Sony Corporation], ACX302 Datasheet - Page 20

• Manufacturer Part Number: ACX302
• Description: 8.80cm (3.5 Type) NTSC/PAL Color LCD Panel
• Manufacturer: SONY [Sony Corporation]

2. Description of LCD Panel Operations
• A vertical driver, which consists of vertical shift registers, enable-gates and buffers, applies a selected pulse
• The selected pulse is output when the enable pin goes to high level. PAL signal pulse elimination display and
• A horizontal driver, which consists of horizontal shift registers, gates and CMOS sample-and-hold circuitry,
• The scanning direction of the horizontal shift registers can be switched with the RGT pin. The scanning
• The vertical and horizontal drivers address one pixel, and then thin film transistors (TFTs; two TFTs for one
• Pixel dots are arranged in a delta arrangement, where sets of RGB pixels are positioned shifted by 1.5 dots
• The video signal should be input with the polarity-inverted every horizontal cycle.
• The relationships between the vertical shift register start pulse VST and the vertical display period, and
(1) Vertical display period (DWN: high level)
(3) Horizontal display period (RGT: high level)
(2) Vertical display period (DWN: low level)
to each of 228 line electrodes sequentially one line electrode at a time in a single horizontal scanning period.
16:9 mode pulse elimination display are possible by using the enable pin and simultaneously controlling VCK.
applies selected pulses to each of 880 signal electrodes sequentially in a single horizontal scanning period.
These pulses are used to supply the sampled video signal to the row signal lines.
direction is left to right (right scan) for RGT pin at high level (2.6 to 5.5V), and right to left (left scan) for RGT
pin at low level (0V). In addition, the scanning direction of the vertical shift registers can be switched with the
DWN pin. The scanning direction is top to bottom for DWN pin at high level (2.6 to 5.5V), and bottom to top
for DWN pin at low level (0V). (These scanning directions are from a front view.)
pixel) turn on to apply a video signal to the pixel. The same procedures lead to the entire 228
display a picture in a single vertical scanning period.
against adjacent horizontal lines. The horizontal driver output pulse must be shifted by 1.5 dots for each
horizontal line against the horizontal sync signal to apply a video signal to each pixel properly.
between the horizontal shift register start pulse HST and the horizontal display period are shown below for
top to bottom and left to right scan.
HCK1
HCK2
HST
VCK
BLK
VCK
VST
VST
VD
VD
1
Horizontal display period (48.9µs)
2
3
– 20 –
1
1
Vertical display period 228H (14.5ms)
Vertical display period 228H (14.5ms)
293
294
2
2
295
227
227
228
228
880 pixels to
ACX302AK