Sony LCX027AKB Datasheet

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E98X21-PS

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.

1.4cm (0.55-inch) NTSC/PAL Color LCD Panel

Description

The LCX027AKB is a 1.4cm diagonal active matrix
TFT-LCD panel addressed by polycrystalline silicon
super thin film transistors with built-in peripheral
driving circuit. This panel provides full-color
representation in NTSC/PAL mode. RGB dots are
arranged in a delta pattern featuring high picture
quality of no fixed color patterns, which is inherent in
vertical stripes and mosaic pattern arrangements.

Features

• The number of active dots: 180,000 (0.55-inch; 1.397cm in diagonal)

• Horizontal resolution: 400 TV lines

• High optical transmittance: 4.2% (typ.)

• High contrast ratio with normally white mode: 200 (typ.)

• Built-in H and V drivers (built-in input level conversion circuit, TTL drive possible)

• High quality picture representation with RGB delta arranged color filters

• Full-color representation

• NTSC/PAL compatible

• Right/left inverse display function

• 4:3 and 16:9 aspect switching function

Element Structure

• Dots

Total dots : 827 (H) × 228 (V) = 188,556
Active dots: 800 (H) × 225 (V) = 180,000

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

Applications

• Viewfinders

• Super compact liquid crystal monitors etc.

LCX027AKB

For the availability of this product, please contact the sales office.

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LCX027AKB

Block Diagram

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

H Shift Register

V Level
Conversion
Circuit

V Shift Register

CS LC

COM

Pad

V

DD

V

SS

VST

VCK

(NC)

EN

CLR

RGT

HST

HCK2

HCK1

BLK

BLUE

RED

GREEN

COM

Top/bottom
BLK Control
Circuit

H Level
Conversion
Circuit

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LCX027AKB

Absolute Maximum Ratings (VSS = 0V)

• H and V driver supply voltages VDD –1.0 to +17 V

• H driver input pin voltage HST, HCK1, HCK2 –1.0 to +17 V
RGT

• V driver input pin voltage VST, VCK –1.0 to +17 V
CLR, EN, BLK

• Video signal input pin voltage GREEN, RED, BLUE –1.0 to +15 V

• Operating temperature Topr –10 to +70 °C

• Storage temperature Tstg –30 to +85 °C

Operating Conditions (VSS = 0V)

Supply voltage

VDD 11.4 to 12.6 V

Input pulse voltage (Vp-p of all input pins except video signal input pins)

Vin 2.6V (more than)

Pin Description

Pin

No.

1

2

3

4

5

6

7

8

COM

GREEN

RED

BLUE

BLK

HCK1

HCK2

HST

Common voltage of panel

Video signal (G) to panel

Video signal (R) to panel

Video signal (B) to panel

Top/bottom block display pulse
Clock pulse for H shift register

drive
Clock pulse for H shift register

drive
Start pulse for H shift register

drive

9

10

11

(12)

13

14

15

16

RGT

CLR

EN

(NC)

VCK

VST

Vss

VDD

Drive direction pulse for H shift
register (H: normal, L: reverse)

Improvement pulse for
uniformity

Enable pulse for gate selection

Not connected
Clock pulse for V shift register

drive
Start pulse for V shift register

drive
GND (H, V drivers)

Power supply for H and V drivers

Symbol Description

Pin
No.

Symbol Description

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LCX027AKB

Input Equivalent Circuit

To prevent static charges, protective diodes are provided for each pin except the power supply. In addition,
protective resistors are added to all pins except video signal input. All pins are connected to Vss with a high
resistance of 1MΩ (typ.). The equivalent circuit of each input pin is shown below: (The resistor value: typ.)

(1) Video signal input

Input

V

DD

From H driver

Signal line

1MΩ

(2) HCK1, HCK2

VDD

250Ω

250Ω

250Ω

250Ω

Level conversion
circuit (2-phase
input)

HCK1

HCK2

1MΩ

1MΩ

(3) HST

Level conversion
circuit (single­phase input)

250Ω250Ω

V

DD

Input

1MΩ

(4) RGT, VST, CLR, EN, VCK, BLK

Level conversion
circuit (single­phase input)

2.5kΩ

2.5kΩ

V

DD

Input

1MΩ

(5) COM

Input

1MΩ

LC

VDD

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LCX027AKB

Level Conversion Circuit

The LCX027AKB has a built-in level conversion circuit in the clock input unit located inside the panel. The
circuit voltage is stepped up to VDD inside the panel. This level conversion circuit meets the specifications of a

3.0V power supply of the externally-driven IC.

1. I/O characteristics of level conversion circuit

(For a single-phase input unit)

An example of the I/O voltage characteristics of a
level conversion circuit is shown in the figure to the
right. The input voltage value that becomes half the
output voltage (after voltage conversion) is defined
as Vth.
The Vth value varies depending on the VDD voltage.
The Vth values under standard conditions are
indicated in the table below. (HST, VST, EN, CLR,
RGT, VCK and BLK in the case of a single-phase input)

VDD = 12.0V

VDD

2

VDD

Vth

Input voltage [V]

Example of single-phase
I/O characteristics

Output voltage (inside panel)

Item

Vth voltage of circuit Vth 0.35 1.50 2.60 V

Symbol Min. Typ. Max. Unit

(For a differential input unit)

An example of I/O voltage characteristics of a level
conversion circuit for a differential input is shown in
the figure to the right. Although the characteristics,
including those of the Vth voltage, are basically the
same as those for a single-phased input, the two­phased input phase is defined. (Refer to clock
timing conditions.)

VDD

2

VDD

Vth

Input voltage [V]

Example of differential I/O
characteristics

Output voltage (inside panel)

2. Current characteristics at the input pin of level conversion circuit

A slight pull-in current is generated at the input pin
of the level conversion circuit. (The equivalent
circuit is shown to the right.) The current volume
increases as the voltage at the input pin decreases,
and is maximized when the pin is grounded. (Refer
to electrical characteristics.)

VDD

output

HCK1
input

HCK2
input

Level conversion equivalent circuit

0

0

Max. value

Input pin voltage [V]

10

Pull-in current characteristics at the input pin

Input pin current

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LCX027AKB

Input Signals

1. Input signal voltage conditions (VSS = 0V, VDD = 11.4 to 12.6V)

Item

H driver input voltage
(HST, HCK1, HCK2, RGT)

(Low)
(High)
(Low)
(High)

VHIL
VHIH
VVIL
VVIH
VVC
VCOM

–0.35

2.6

–0.35

2.6

5.8

VVC – 0.3

0.0

3.0

0.0

3.0

6.0

VVC – 0.15

0.35

3.5

0.35

3.5

6.2

VVC

V
V
V
V
V
V

V driver input voltage
(VST, VCK1, VCK2, CLR, EN)

Video signal center voltage
Common voltage of panel

Symbol Min. Typ. Max. Unit

Note) Video signal shall be symmetrical to VVC.

Supplement) Video signal input range is set within the range shown below for VDD and VSS.

Also, video signal white level is defined for VVC as shown below.

Item
Video signal input range
Video signal input white level

Vsig
VsigL

VSS + 1.3

0.5

VDD – 1.8 V

V

Symbol Min. Typ. Max. Unit

A

A

A

VsigL

White level

VsigL

Video signal input range
Max. VDD – 1.8 [V]
Min. VSS + 1.3 [V]

V

DD

VDD – 1.8

VVC

V

SS + 1.3

V

SS

AAA
AAA
AAA

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LCX027AKB

Hst rise time
Hst fall time
Hst data set-up time
Hst data hold time
Hckn∗2rise time
Hckn∗2fall time
Hck1 fall to Hck2 rise time
Hck1 rise to Hck2 fall time
Clr rise time
Clr fall time
Clr pulse width
Clr fall to Hst rise time
Vck rise/fall to Clr fall time
Vst rise time
Vst fall time
Vst data set-up time
Vst data hold time
Vck rise time
Vck fall time
En rise time
En fall time
Vck rise/fall to En fall time
BLK rise time
BLK fall time
BLK pulse width
BLK fall to Clr fall time

trHst
tfHst
tdHst
thHst
trHckn
tfHckn
to1Hck
to2Hck
trClr
tfClr
twClr
toHst
thVck
trVst
tfVst
tdVst
thVst
trVck
tfVck
trEn
tfEn
tdVck
trBlk
tfBlk
twBlk
toClr

–100
–200

–15
–15

3400
1850

400

–50
–50

–100

600

60

–120

0
0

3500
1950

500

32

–32

0

1.0

700

30

30
100
–50

30

30

15

15
100
100

3600
2050

600
100
100

50
–20
100
100
100
100
100
100
100

800

ns

µs

ns

ms

ns

Item Symbol Min. Typ. Max. Unit

HST

HCK

CLR

VST

VCK

EN

BLK

∗3

∗2

Hckn means Hck1, Hck2. (fHckn = 2.75MHz, fVckn = 7.865kHz)

∗3

BLK pulse is used only for 16:9 mode. For 4:3 mode, connect to VSS.

2. Clock timing conditions (Ta = 25°C, Input voltage = 3.0V, VDD = 12.0V)