Description
The LCX026ALG is a 2.3cm diagonal active matrix
TFT-LCD panel addressed by polycrystalline silicon
super thin film transistors with a built-in peripheral
driving circuit. Use of three LCX026ALG panels
provides a full-color representation. The striped
arrangement suitable for data projectors is capable
of displaying fine text and vertical lines.
The adoption of an advanced on-chip black matrix
realizes a high luminance screen. And cross talk
free circuit and ghost free circuit contribute to high
picture quality.
This panel has a polysilicon TFT high-speed
scanner and built-in function to display images
up/down and/or right/left inverse. The built-in 5V
interface circuit leads to lower voltage of timing and
control signals.
The panel contains an active area variable circuit
which supports SVGA/VGA/PC98
1
data signals by
changing the active area according to the type of
input signal. In addition, double-speed processed
NTSC/PAL can also be supported.
1
"PC98" is a treadmark of NEC Corporation.
Features
Number of active dots: 485,000 (0.9-inch, 2.3cm in diagonal)
Accepts the computer requirements of SVGA (804
604), VGA (644
484) and PC98 (644
404) platforms
Supports NTSC (644
484) and PAL (762
572) by processing the video signal at double speed
High optical transmittance: 17% (typ.)
Built-in cross talk free circuit and ghost free circuit
High contrast ratio with normally white mode: 350 (typ.)
Built-in H and V drivers (built-in input level conversion circuit, 5V driving possible)
Up/down and/or right/left inverse display function
High durable polarizer used
Built-in
/2 retardation film for green light (V)
Element Structure
Dots: 804 (H)
604 (V) = 485,616
Built-in peripheral driver using polycrystalline silicon super thin film transistors
Applications
Liquid crystal data projectors
Liquid crystal projectors, etc.
1
LCX026ALG
E98537-PS
2.3cm (0.9-inch) Black-and-White LCD Panel
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
For the availability of this product, please contact the sales office.
2
LCX026ALG
Block Diagram
1
18
H Shift Register (Bidirectional Scanning)
U
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6
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5
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4
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3
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2
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1
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V
D
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H
V
D
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M
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1
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N
B
D
W
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P
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V
C
K
V
S
T
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T
B
L
K
H
C
K
2
H
C
K
1
H
S
T
P
S
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G
14
15
17
9
20
19
21
22
12
11
10
8
23
16
7
6
4
3
5
2
24
Black Frame Control Circuit
B
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k
F
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13
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2
M
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3
Input Signal
Level Shifter
Circuit
3
LCX026ALG
Absolute Maximum Ratings (V
SS
= 0V)
H driver supply voltage
HV
DD
1.0 to +20
V
V driver supply voltage
VV
DD
1.0 to +20
V
Common pad voltage
COM
1.0 to +17
V
H shift register input pin voltage HST, HCK1, HCK2,
1.0 to +17
V
RGT
V shift register input pin voltage
VST, VCK, PCG,
1.0 to +17
V
BLK, ENB, DWN
MODE1, MODE2, MODE3
Video signal input pin voltage
SIG1, SIG2, SIG3, SIG4,
1.0 to +15
V
SIG5, SIG6, PSIG
Operating temperature
Topr
10 to +70
C
Storage temperature
Tstg
30 to +85
C
Operating Conditions (V
SS
= 0V)
Supply voltage
HV
DD
15.5 0.5V
VV
DD
15.5 0.5V
Input pulse voltage (Vp-p of all input pins except video signal and uniformity improvement signal input pins)
Vin
5.0 0.5V
Pin Description
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
PSIG
SIG4
SIG3
SIG5
SIG2
SIG6
SIG1
HV
DD
RGT
MODE3
MODE2
MODE1
13
14
15
16
17
18
19
20
21
22
23
24
HST
HCK1
HCK2
Vss
BLK
ENB
VCK
VST
PCG
DWN
VV
DD
COM
Start pulse for H shift register
drive
Clock pulse for H shift register
drive
Clock pulse for H shift register
drive
GND (H, V drivers)
Black Frame display pulse
Enable pulse for gate selection
Clock pulse for V shift register
drive
Start pulse for V shift register
drive
Improvement pulse for uniformity
Drive direction pulse for V shift
register (H: normal, L: reverse)
Power supply for V driver
Common voltage of panel
Symbol
Description
Pin
No.
Symbol
Description
Uniformity improvement signal
Video signal 4 to panel
Video signal 3 to panel
Video signal 5 to panel
Video signal 2 to panel
Video signal 6 to panel
Video signal 1 to panel
Power supply for H driver
Drive direction pulse for H shift
register (H: normal, L: reverse)
Display area switching 3
Display area switching 2
Display area switching 1
4
LCX026ALG
Input Equivalent Circuit
To prevent static charges, protective diodes are provided for each pin except the power supplies. In addition,
protective resistors are added to all pins except the video signal inputs. All pins are connected to V
SS
with a
high resistor of 1M
(typ.). The equivalent circuit of each input pin is shown below: (Resistance value: typ.)
Input
LC
Level conversion circuit
(single-phase input)
2.5k
2.5k
VV
DD
Input
Level conversion circuit
(single-phase input)
250
250
HV
DD
Input
Level conversion circuit
(single-phase input)
2.5k
2.5k
HV
DD
Input
HV
DD
250
250
250
250
Level conversion circuit
(2-phase input)
Input
HV
DD
Signal line
(1) SIG1, SIG2, SIG3, SIG4, SIG5, SIG6, PSIG
(2) HCK1, HCK2
(3) RGT
(4) HST
(5) PCG, VCK
(6) VST, BLK, ENB, DWN, MODE1, MODE2, MODE3
(7) COM
1M
Input
1M
1M
1M
Level conversion circuit
(single-phase input)
250
250
VV
DD
Input
1M
1M
1M
VV
DD
1M
5
LCX026ALG
Input Signals
1. Input signal voltage conditions (V
SS
= 0V)
Item
H shift register input voltage
HST, HCK1, HCK2, RGT
(Low)
(High)
(Low)
(High)
VHIL
VHIH
VVIL
VVIH
VVC
Vsig
Vcom
Vpsig
0.5
4.5
0.5
4.5
6.8
VVC 4.5
VVC 0.5
VVC 4.3
0.0
5.0
0.0
5.0
7.0
7.0
VVC 0.4
VVC 4.5
0.4
5.5
0.4
5.5
7.2
VVC + 4.5
VVC 0.3
VVC 4.7
V
V
V
V
V
V
V
V
V shift register input voltage
MODE1, MODE2, MODE3,
BLK, VST, VCK, PCG,
ENB, DWN
Video signal center voltage
Video signal input range
1
Common voltage of panel
2
Uniformity improvement signal
input voltage (PSIG)
3
Symbol
Min.
Typ.
Max.
Unit
1
Input video signal shall be symmetrical to VVC.
2
The typical value of the common pad voltage may lower its suitable voltage according to the set
construction to use. In this case, use the voltage of which has maximum contrast as typical value.
When the typical value is lowered, the maximum and minimum values may lower.
3
Input a uniformity improvement signal PSIG in the same polarity with video signals SIG1 to 6 and which is
symmetrical to VVC. Also, the rising and falling of PSIG are synchronized with the rising of PCG pulse, and
the rise time trPSIG and fall time tfPSIG are suppressed within 800ns (as shown in a diagram below).
The optimum input voltage of PSIG may be changed according as drive conditions of the drive side.
Level Conversion Circuit
The LCX026ALG has a built-in level conversion circuit in the clock input unit on the panel. The input signal
level increases to HV
DD
or VV
DD
. The V
CC
of external ICs are applicable to 5 0.5V.
trPSIG
tfPSIG
VVC
PSIG
PCG
90%
10%
Input waveform of uniformity improvement signal PSIG
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