LCX024AKB
1.4cm (0.55-inch) NTSC/PAL Color LCD Panel
Description
The LCX024AKB 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: 113,578 (0.55-inch; 1.397cm in diagonal)
• Horizontal resolution: 260 TV lines
• High optical transmittance: 3.4% (typ.)
• High contrast ratio with normally white mode: 270 (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 : 537 (H)
×
222 (V) = 119,214
Active dots: 521 (H)
×
218 (V) = 113,578
• Built-in peripheral driver using polycrystalline silicon super thin film transistors.
Applications
• Viewfinders
• Super compact liquid crystal monitors etc.
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–
E98404A8X-PS
LCX024AKB
Block Diagram
HCK2
GREEN
2
HCK1
BLUE
16
15
14
13
12
11
10
9
8
7
6
5
4
3
H Level
Conversion
Circuit
H Shift Register
V Level
Conversion
Circuit
V Shift Register
C
S
LC
COM
Pad
–2–
COM
1
(NC)
RGT
VCK
CLR
VST
HST
V
DD
BLK
V
SS
EN
RED
LCX024AKB
Absolute Maximum Ratings
(V
SS
= 0V)
• H and V driver supply voltages
V
DD
• H driver input pin voltage
HST, HCK1, HCK2
RGT
• V driver input pin voltage
VST, VCK
CLR, EN, BLK
• Video signal input pin voltage
GREEN, RED, BLUE
• Operating temperature
• Storage temperature
Topr
Tstg
–1.0 to +17
–1.0 to +17
–1.0 to +17
–1.0 to +15
–10 to +70
–30 to +85
V
V
V
V
°C
°C
Operating Conditions
(V
SS
= 0V)
Supply voltage
V
DD
11.4 to 14.0
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
Symbol
COM
GREEN
RED
BLUE
BLK
HCK1
HCK2
HST
Description
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
Pin
No.
9
10
11
(12)
13
14
15
16
Symbol
RGT
CLR
EN
(NC)
VCK
VST
Vss
V
DD
Description
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
–3–
LCX024AKB
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
V
DD
From H driver
Input
1MΩ
Signal line
(2) HCK1, HCK2
V
DD
250Ω
250Ω
HCK1
250Ω
HCK2
1MΩ
250Ω
1MΩ
Level conversion
circuit (2-phase
input)
(3) HST
V
DD
250Ω
Input
1MΩ
250Ω
Level conversion
circuit (single-
phase input)
(4) RGT, VST, CLR, EN, VCK
V
DD
2.5kΩ
Input
1MΩ
2.5kΩ
Level conversion
circuit (single-
phase input)
(5) BLK
V
DD
2.5kΩ
Input
28kΩ
1MΩ
2.5kΩ
Level conversion
circuit (single-
phase input)
(6) COM
V
DD
Input
1MΩ
LC
–4–
LCX024AKB
Level Conversion Circuit
The LCX024AKB has a built-in level conversion circuit in the clock input unit located inside the panel. The
circuit voltage is stepped up to V
DD
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
Output voltage (inside panel)
(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 V
DD
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)
V
DD
Example of single-phase
I/O characteristics
V
DD
2
Vth
Input voltage [V]
V
DD
= 12.0V
Item
Vth voltage of circuit
Symbol
Vth
Min.
0.35
Typ.
1.50
Max.
2.60
Unit
V
Output voltage (inside panel)
(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 two-
phased input phase is defined. (Refer to clock
timing conditions.)
V
DD
Example of differential I/O
characteristics
V
DD
2
Vth
Input voltage [V]
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.)
0
0
Input pin voltage [V]
10
V
DD
output
Input pin current
HCK1
input
HCK2
input
Max. value
Level conversion equivalent circuit
Pull-in current characteristics at the input pin
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