參數(shù)資料
型號: LCX012BL
廠商: Sony Corporation
英文描述: 3.3cm (1.3-inch) Black-and-White LCD Panel
中文描述: 3.3厘米(1.3英寸),黑與白液晶面板
文件頁數(shù): 17/21頁
文件大?。?/td> 381K
代理商: LCX012BL
– 17 –
LCX012BL
2. LCD Panel Operations
[Description of basic operations]
The basic operations of the LCD panel are shown below based on the VGA mode.
A vertical driver, which consists of vertical shift registers, enable-gates and buffers, applies a selected pulse
to every 484 gate lines sequentially in every horizontal scanning period. Two lines of horizontal electrodes
are sequentially selected in NTSC/PAL mode.
A horizontal driver, which consists of horizontal shift registers, gates and CMOS sample-and-hold circuits,
applies selected pulses to every 644 signal electrodes sequentially in a single horizontal scanning period.
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 484
×
644 dots to display a
picture in a single vertical scanning period.
To change the combination of the horizontal electrode in NTSC/PAL mode, the phase of VCK need to be
inverted. Normally, switching every field maximizes vertical resolution.
The CLR pin is provided to eliminate the shading effect caused by the coupling of selected pulses. While
maintaining the CLR at High level, the VV
DD
potential drops to approximately 9.5V. This pin shall be
grounded when not in use.
The video signal shall be input with 1H-inverted system.
Timing diagrams of the vertical for VGA mode and NTSC/PAL mode and the horizontal display cycle are
shown below:
Vertical display cycle 480H
1
2
480
(1) Vertical display cycle (VGA)
VD
VST
(DWN = High level)
VST
(DWN = Low level)
VCK
(2) Horizontal display cycle
Horizontal display cycle
1
2
3
4
5
6
108
109
HD
HST
HCK1
HCK2
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