Sony LCX038AST Datasheet

1.8cm (0.7 Type) Black-and-White LCD Panel

Description

The LCX038AST is a 1.8cm diagonal active matrix
TFT-LCD panel addressed by polycrystalline silicon
super thin film transistors with a built-in peripheral
driving circuit. Use of three LCX038AST 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 DMS∗1structure and high light
resistance structure realize 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 S-XGA 5:4 and PC-98 8:5 data signals
by changing the active area according to the type of
input signal.

∗1

Dual Metal Shield

Features

• Number of active dots: 786,432 (0.7 Type, 1.8cm in diagonal)

• XGA, SVGA, VGA, NTSC, PAL display

• SXGA display with simple display

• High optical transmittance: 21% (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

• Antidust glass package

• Left twist liquid crystal

Element Structure

• Dots: 1024 (H) × 768 (V) = 786,432

• Built-in peripheral driver using polycrystalline silicon super thin film transistors

Applications

• Liquid crystal data projectors

• Liquid crystal multimedia projectors

• Liquid crystal rear-projector TVs, etc.

– 1 –

E00447A0Y

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.

LCX038AST

∗

The company's name and product's name in this data sheet is a trademark or a registered trademark of each company.

– 2 –

LCX038AST

18

H Shift Register (Bidirectional Scanning)

Up/Down and/or Right/Left

Inversion Control Circuit

Precharge Control

Circuit

COM
PAD

COM

VSIG6

VSIG5

VSIG4

VSIG3

VSIG2

VSIG1

Vss

VV

DD

HV

DD

ENB

DWN

PCG

VCK

VST

RGT

BLK

HCK2

HCK1

HST

V

SSGL

PSIG

17

20

19

21

22

23

16

2

24

Black Frame Control Circuit

HB

VB

25

29

26

28

15

30

27

Side-Black Control Circuit

V Shift Register

(Bidirectional Scanning)

Black Frame Control Circuit

V Shift Register

(Bidirectional Scanning)

V

SSGR

9

12

11

10

8

7

4

3

5

13

6

14

31

VSIG7

VSIG8

VSIG9

VSIG10

VSIG11

VSIG12

1

Input Signal
Level Shifter
Circuit

Block Diagram

– 3 –

LCX038AST

Absolute Maximum Ratings (VSS = 0V)

• H driver supply voltage HVDD –1.0 to +20 V

• V driver supply voltage VVDD –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
HB, VB

• Video signal input pin voltage VSIG1 to 12, PSIG –1.0 to +15 V

• Operating temperature

∗

Topr –10 to +70 °C

• Storage temperature Tstg –30 to +85 °C

∗

Panel temperature inside the antidust glass

Operating Conditions (VSS = 0V)

• Supply voltage

HVDD 13.5 ± 0.5V
VVDD 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

– 4 –

LCX038AST

Pin Description

Pin
No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

PSIG
VSSGR
VSIG1
VSIG2
VSIG3
VSIG4
VSIG5
VSIG6
VSIG7
VSIG8
VSIG9
VSIG10
VSIG11
VSIG12
HVDD
RGT
HST
HCK2
HCK1
VSS
VSSGL
BLK
ENB
VCK
VST
DWN
HB
VB
PCG
VVDD
COM
TEST

Symbol Description

Uniformity improvement signal
GND for right V gate
Video signal 1 to panel
Video signal 2 to panel
Video signal 3 to panel
Video signal 4 to panel
Video signal 5 to panel
Video signal 6 to panel
Video signal 7 to panel
Video signal 8 to panel
Video signal 9 to panel
Video signal 10 to panel
Video signal 11 to panel
Video signal 12 to panel
Power supply for H driver
Drive direction pulse for H shift register (H: normal, L: reverse)
Start pulse for H shift register drive
Clock pulse for H shift register drive 2
Clock pulse for H shift register drive 1
GND (H, V drivers)
GND for left V gate
Input for PC98 mode
Enable pulse for gate selection
Clock pulse for V shift register drive
Start pulse for V shift register drive
Drive direction pulse for V shift register (H: normal, L: reverse)
Display switch for S-XGA
Display switch for PC98 mode
Improvement pulse for uniformity
Power supply for V driver
Common voltage of panel
Test pin, leave this pin open

– 5 –

LCX038AST

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 VSS with a
high resistor of 1MΩ (typ.). The equivalent circuit of each input pin is shown below: (Resistance value: typ.)

(1) VSIG1 to VSIG12, PSIG

HVDD

250Ω

250Ω

250Ω

250Ω

Input

1MΩ

1MΩ

Level conversion circuit

(2-phase input)

2.5kΩ2.5kΩ

HVDD

Input

1MΩ

Level conversion circuit

(single-phase input)

250Ω250Ω

HVDD

Input

1MΩ

Level conversion circuit

(single-phase input)

250Ω250Ω

VVDD

Input

1MΩ

Level conversion circuit

(single-phase input)

2.5kΩ2.5kΩ

VVDD

Input

1MΩ

Level conversion circuit

(single-phase input)

Input

LC

VVDD

1MΩ

(2) HCK1, HCK2

(3) RGT

(4) HST

(5) PCG, VCK

(6) VST, BLK, ENB, HB, VB, DWN

(7) COM

Input

HVDD

Signal line

1MΩ

are all Vss.

– 6 –

LCX038AST

Input Signals

1. Input signal voltage conditions (VSS = 0V)

∗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 VSIG1 to VSIG12 and
which is symmetrical to VVC. PSIG wave form is 2 steps like below, in the upper chart, upper shows signal
level of the 1st step, lower shows signal level of the 2nd step. 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 450ns (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 LCX038AST has a built-in level conversion circuit in the clock input unit on the panel. The input signal
level increases to HVDD or VVDD. The VCC of external ICs are applicable to 5 ± 0.5V.

trPSIG
tfPSIG

VVC

PSIG

PCG

90%

10%

PRG

∗

4

PsigG

PsigB

Input waveform of uniformity improvement signal PSIG

∗4

PRG shows the time of the 1st step of PSIG signal, and it is not input to the panel.

Item

H shift register input voltage
HST, HCK1, HCK2, RGT

(Low)
(High)

(Low)
(High)

VHIL
VHIH

VVIL
VVIH

VVC
Vsig
Vcom
VpsigB
VpsigG

–0.5

4.5

–0.5

4.5

7.4
VVC – 5.0
VVC – 0.5
VVC ± 4.9
VVC ± 1.8

0.0

5.0

0.0

5.0

7.5

7.0
VVC – 0.4
VVC ± 5.0
VVC ± 1.9

0.4

5.5

0.4

5.5

7.6
VVC + 5.0
VVC – 0.3
VVC ± 5.1
VVC ± 2.0

V
V

V
V

V
V
V

V

V shift register input voltage
HB, VB, 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

– 7 –

LCX038AST

2. Clock timing conditions (Ta = 25°C) (XGA mode: fHckn = 3.9MHz, fVck = 34.3kHz)

∗5

Hckn means Hck1 and Hck2.

∗6

Blk is the timing during PC98 mode, which keeps "H" level in other modes.

Hst rise time
Hst fall time
Hst data set-up time
Hst data hold time
Hckn rise time

∗5

Hckn fall time

∗5

Hck1 fall to Hck2 rise time
Hck1 rise to Hck2 fall time
Vst rise time
Vst fall time
Vst data set-up time
Vst data hold time
Vck rise time
Vck fall time
Enb rise time
Enb fall time
Horizontal video period completed to Enb fall time
Enb rise to PRG∗4fall time
Enb fall to Pcg rise time
Enb pulse width
Pcg rise time
Pcg fall time
Pcg rise to Vck rise/fall time
Pcg fall to horizontal video period start time
Pcg pulse width
PRG∗4rise to Pcg rise time
PRG∗4fall to Pcg fall time
PRG∗4pulse width
Blk rise time
Blk fall time
Blk rise to Enb fall time
Blk fall to Pcg rise time

trHst
tfHst
tdHst
thHst
trHckn
tfHckn
to1Hck
to2Hck
trVst
tfVst
tdVst
thVst
trVck
tfVck
trEnb
tfEnb
tdEnb
toPRG

∗4

toPcg
twEnb
trPcg
tfPcg
toVck
toVideo
twPcg
toPcgr
toPcgf
twPRG

∗4

trBlk
tfBlk
toEnb
toPcg

—
—

55
55

—

—
–15
–15

—

—

2
2

—

—

—

—

760
110
830

1650

—

—

–100

170

1400

–10
570
830

—

—

2

–1

—
—

65
65

—
—

0
0

—
—

7
7

—
—
—
—

800
120

1000

—
—
—

0

200

1700

0

700

1000

—
—

1
0

30
30
75
75
30
30
15

15
100
100

12

12
100
100
100
100

—

130

—

—

30

30
100

—

—

10

—

—

100
100

0
1

ns

µs

ns

Item Symbol Min. Typ. Max. Unit

HST

HCK

VST

VCK

ENB

PCG

BLK

∗6

PRG

∗4

µs

– 8 –

LCX038AST

∗7

Definitions: The right-pointing arrow ( ) means +.

The left-pointing arrow ( ) means –.
The black dot at an arrow ( ) indicates the start of measurement.

<Horizontal Shift Register Driving Waveform>

Hst rise time

HST

HCK

Hst fall time

Hst data set-up time

Hst data hold time

Hckn rise time

∗5

Hckn fall time

∗5

Hck1 fall to Hck2 rise time

Hck1 rise to Hck2 fall time

• Hckn

∗5

duty cycle 50%
to1Hck = 0ns
to2Hck = 0ns

• Hckn

∗5

duty cycle 50%
to1Hck = 0ns
to2Hck = 0ns

• Hckn

∗5

duty cycle 50%
to1Hck = 0ns
to2Hck = 0ns

trHst

tfHst

tdHst

thHst

trHckn

tfHckn

to1Hck

to2Hck

Item Symbol Waveform Conditions

90%

10%

10%

90%

Hst

trHst tfHst

50%

50%

∗

7

Hst

Hck1

tdHst thHst

50% 50%

∗

5

Hckn

10%

10%

90%

90%

trHckn tfHckn

50%

50%

∗7

Hck1

to2Hck to1Hck

50%

50%

Hck2

– 9 –

LCX038AST

<Vertical Shift Register Driving Waveform>

VCK

ENB

Vck rise time

Vck fall time

Enb rise time

Enb fall time

Horizontal video period
completed to Enb fall time

trVck

tfVck

trEnb

tfEnb

tdEnb

Enb rise to PRG∗4fall time

Enb fall to Pcg rise time

toPRG

∗4

toPcg

Enb pulse width

twEnb

Item Symbol Waveform Conditions

Vck

10%

10%

90%

90%

trVck tfVck

90%

90%

10%

10%

tfEnb trEnb

Enb

50%

50%

toPRG

∗

4

Enb

∗

7

50%

PRG

∗

4

H. Blanking periodH. Video period

tdEnb

PCG

50%

toPcg

50%

twEnb

Vst rise time

VST

Vst fall time

Vst data set-up time

Vst data hold time

trVst

tfVst

tdVst

thVst

90%

10%

10%

90%

Vst

trVst tfVst

50%

50%

∗

7

Vst

Vck

tdVst thVst

50%

50%