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SAMSUNG TFT-LCD
MODEL : LTA400HM21-W
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Samsung Secret
Product Information
DATE : 05. Apr. 2012
The Information Described in this Specification is Preliminary and can be changed without
prior notice
Samsung Display Co . , LTD.
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Contents
Samsung Secret
Revision History -------------------------------------------------------------------------------------------- (3)
General Description --------------------------------------------------------------------------------------- (4)
General Information --------------------------------------------------------------------------------------- (4)
1. Absolute Maximum Ratings -------------------------------------------------------------------------- (5)
2. Optical Characteristics --------------------------------------------------------------------------------- (6)
3. Electrical Characteristics ------------------------------------------------------------------------------- (9)
3.1 TFT LCD Module
3.2 Back Light Unit
3.3 Converter Input & Specification
4. Input Terminal Pin Assignment --------------------------------------------------------------------- (12)
4.1 Input Signal & Power
4.2 Converter Input Pin Configuration
4.3 Converter Input Power Sequence
4.4 LVDS Interface
4.5 Input Signals, Basic Display Colors and Gray Scale of Each Color
5. Interface Timing ---------------------------------------------------------------------------------------- (18)
5.1 Timing Parameters (DE mode)
5.2 LVDS Input data Characteristics
5.3 Timing Diagrams of interface Signal (DE mode)
5.4 Power ON/OFF Sequence
6. Outline Dimension -------------------------------------------------------------------------------------- (21)
7. Packing --------------------------------------------------------------------------------------------------- (24)
8. Marking & Others --------------------------------------------------------------------------------------- (25)
9. General Precaution ----------------------------------------------------------------------------------- (26)
9.1 Handling
9.2 Storage
9.3 Operation
9.4 Operation Condition Guide
9.5 Others
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Revision History
Date Rev. No Page Summary
Samsung Secret
5. Apr.
2012
000 all First issued
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General Description
Samsung Secret
Description
LTA400HM21 is a color active matrix liquid crystal display (LCD) that uses amorphous
silicon TFT (Thin Film Transistor) as switching components. This model is composed of a
TFT LCD panel, a driver circuit and a back light unit.
The resolution of a 40.0” is 1920 x 1080 and this model can display up to16.7 Million
colors with wide viewing angle of 89¶ or higher in all directions. This panel is intended to
support applications to provide a excellent performance for Flat Panel Display such as
Home-alone Multimedia TFT-LCD TV and High Definition TV.
Features
RoHS compliance (Pb-free)
High contrast ratio & aperture ratio with wide color gamut
SPVA(Super Patterned Vertical Align) mode
Wide viewing angle (·178¶)
High speed response
FHD resolution (16:9)
Low Power consumption
Edge Type LED (Light Emitted Diode) BLU
DE (Data Enable) mode
2ch LVDS (Low Voltage Differential Signaling) interface (2pixel/clock)
General Information
Items Specification Unit Note
921.7 (H
Module Size
Weight 9.6 (Max.) kg
Pixel Pitch 0.46125(H) x 0.15375(V) mm
Active Display Area 885.6 x 498.15 mm
Surface Treatment Anti-glare -
Display Colors 8bit – 16.7M Colors
Number of Pixels 1920 x 1080 Pixel
Pixel Arrangement RGB Horizontal stripe -
Display Mode Normally Black -
) x 536.3 (V
TYP
32.5 (D
)
TYP
) Converter
Max.
·1.0mm
mm
Luminance of White 320 (Typ.) cd/m
2
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Samsung Secret
1. Absolute Maximum Ratings
If the condition exceeds maximum ratings, it can cause malfunction or unrecoverable
damage to the device.
Item Symbol Min. Max. Unit Note
Power Supply Voltage V
Storage temperature T
Operating temperature T
Shock ( non - operating ) S
Vibration ( non - operating ) V
Note (1) Ta= 25 · 2 ¶C
(2) Temperature and relative humidity range are shown in the figure below.
a. 90 % RH Max. (Ta ≤ 39 ¶C)
b. Relative Humidity is 90% or less. (Ta > 39 ¶C)
c. No condensation
(3) 11ms, sine wave, one time for ·X, ·Y, ·Z axis
(4) 10-300 Hz, Sweep rate 10min, 30min for X,Y,Z axis
DD
STG
OPR
nop
nop
GND-0.3 16 V (1)
-20 60
050
- 50 G (3)
- 1.5 G (4)
(2)
(2),(5)
90
Fig. Temperature and Relative humidity range
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(5) Definition of test point
5mm
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Samsung Secret
5mm
12
5
LCD Module (Active)
MAX
4
| )
3
T should be less than 10
T
: Temperature of the center of the glass surface (Test point 5)
OPR
(ƸT = | T
OPR
– T
T1~ T4 : Temperature of each edge of the glass surface
T
: The highest temperature of the glass surface
MAX
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2. Optical Characteristics
The optical characteristics should be measured in a dark room or equivalent.
Measuring equipment :
(Ta = 25 · 2¶C, VDD=12.0V, fv=60Hz, f
Item Symbol Condition Min. Typ. Max. Unit Note
Contrast Ratio
(Center of screen)
Response
Time
Luminance of White
(Center of screen)
Color
Chromaticity
(CIE 1931)
G-to-G Tg - 8 16 msec
Red
Green
Blue
TOPCON RD-80S, TOPCON SR-3 ,ELDIM EZ-Contrast
=148.5MHz, LED Current = 140 mA )
DCLK
C/R
Y
L
Normal
Rx
Ry 0.330
Gx 0.300
TL,R=0
TU,D=0
Viewing
Angle
Gy 0.620
Bx 0.150
By 0.050
- 4,000 -
- 320 - cd/m
0.640
TYP.
-0.03
TYP.
+0.03
Samsung Secret
(1)
SR-3
(3)
RD-80S
2
(4)
SR-3
(5),(6)
SR-3
Wx 0.280
White
Wy 0.290
Color Gamut - - 70 - %
Color Temperature - - 10,000 - K
75 89 -
75 89 -
Degree
75 89 -
75 89 -
--30%
Hor.
Viewing
Angle
Ver.
Brightness Uniformity
(9 Points)
T
L
T
R
T
U
T
D
B
uni
C/R≥10
- Test Equipment Setup
The measurement should be executed in a stable, windless and dark room between
40min and 60min after lighting the back light at the given temperature for stabilization
of the back light. This should be measured in the center of screen.
(5)
SR-3
(6)
EZ-Contrast
(2)
SR-3
Environment condition : Ta = 25 · 2 ¶C
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ྙ
ྚྛ
ྞ
ྡ
ྠ
ྜྷ ྜ
ྟ
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Samsung Secret
Photo detector Field
SR-3
RD-80S
TFT - LCD Module
- Definition of test point
1ദ
2ദ
Photo detector
Field
The center of the screen
SR-3 : 50
RD-80S : 50
EZ-Contrast:0
LCD Panel
༃
320 960 1600
180
540
900
Note (1) Definition of Contrast Ratio (C/R)
: Ratio of gray max (Gmax) & gray min (Gmin) at the center point 䐣 of the panel
CR
/
G
max
G
min
Gmax : Luminance with all pixels white
Gmin : Luminance with all pixels black
Active Area
Test Point
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Note (2) Definition of 9 points brightness uniformity (Test pattern : Full White)
Samsung Secret
Buni
BB
(max min)
100
B
max
Bmax : Maximum brightness
Bmin : Minimum brightness
Note (3) Definition of Response time : Sum of Tr, Tf
Display data
Optical Instruments
Response
100%
Black (data off)
T
R
White (data on)
90%
10%
0%
Black (data off)
T
F
GnTTnGaGhGGGGnGGnGOzP
Note (4) Definition of Luminance of White : Luminance of white at center point 䐣
Note (5) Definition of Color Chromaticity (CIE 1931)
Color coordinate of Red, Green, Blue & White at center point 䐣
Note (6) Definition of Viewing Angle
: Viewing angle range (C/R ≥10)
TIME
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3. Electrical Characteristics
3.1 TFT LCD Module
The connector for display data & timing signal should be connected.
Item Symbol Min. Typ. Max. Unit Note
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Samsung Secret
Ta = 25¶C · 2 ¶C
Voltage of Power Supply V
(a) Black
DD
10.8 12.0 13.2 V (1)
- 800
-
mA
Current
of Power
(b) White - 850
I
DD
-
mA
Supply
(c) H-Stripe - 1000 1150 mA
Vsync Frequency f
Hsync Frequency f
V
H
48 60 62 Hz
50 67.5 75 kHz
Main Frequency Fdclk 130 148.5 155 MHz
Rush Current I
RUSH
- - 4.5 A (4)
Note (1) The ripple voltage should be controlled under 10% of VDD.
(2) f
V=60Hz, fDCLK =148.5MHz, V
= 12.0V, DC Current.
DD
(3) Power dissipation check pattern (LCD Module only)
a) Black Pattern b) White Pattern c) H-stripe
(2),(3)
(4) Measurement Conditions
V
100%
DD
90%
10%
GND
Rush Current I
T
can be measured when T
RUSH
RUSH
=470༕
. is 470༕.
RUSH
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3.2 Back Light Unit
The back light unit contains Edge type White LEDs (Light Emitting Diode)
Control Board
LCD Module
Samsung Secret
Ta=25 · 2¶C
Converter
Item Symbol Min. Typ. Max. Unit Note
Operating Life Time Hr 30,000 - - Hour (1)
Note (1) It is defined as the time to take until the brightness reduces to 50% of its original
value.
[Operating condition : Ta = 25·2, For LED package only. ]
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3.3 Converter Input Condition & Specification
Specifications
Items Symbol Conditions
Min. Typ. Max.
Input Voltage Vin - 22 24 26 V
Input Current I
Output
Current
Backlight
On/Off
Dimming Range V
RUSH
I
O,MAX
ON Vin=24.0 V 3.0 - 5.25
OFF Vin=24.0 V 0 - 0.4
_DIM
Vin=24.0V
Vdim =3.3V
Vin = 24.0V
V dim =3.3 V
- - 3.6 A
133 140 147 mA
Vin :22~26V 0 - 3.3 V
Samsung Secret
Unit Note
Ta=25·YG¶j
V
Dimming Duty
Output
Dimming
Frequency
External Dimming
Duty Range
External Dimming
Frequency Range
External Dimming
Signal Level
D max Vin=24V Dim:3.3V 100 - -
%
D min Vin=24V Dim:0V - 1 -
F
PWM
Vin=24.0 V 140 150 160 Hz
EX_Dim Min 1 - 100 %
F
EX_PWM
Vin=22.0~26.0 V 95 - 200 Hz
High (ON) 3 - 5.25
V
PWM
V
Low (Off) 0 - 0.4
Dim Pin(#13)
: Floating
Note) Power Consumption is measured when 320 [cd/m ] of luminance which is the typical
luminance.
(1) All data is measured after 60 min warm-up.
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4. Input Terminal Pin Assignment
Samsung Secret
4.1. Input Signal & Power Connector : FI-RE51S-HF (JAE)
w z k w z k
X
XW
12V DC power supply
Y
Z
[
\
]
^
_
`
12V DC power supply
12V DC power supply
12V DC power supply
12V DC power supply
NC NOTE1
GND Ground
GND Ground
GND Ground
RO[0]N Odd LVDS Signal -
Y]
Y^
Y_
Y`
ZW
ZX
ZY
ZZ
Z[
Z\
RE[0]P Even LVDS Signal +
RE[1]N Even LVDS Signal -
RE[1]P Even LVDS Signal +
RE[2]N Even LVDS Signal -
RE[2]P Even LVDS Signal +
GND Ground
ROCLK- Even LVDS Clock -
ROCLK+ Even LVDS Clock +
GND Ground
RE[3]N Even LVDS Signal -
XX
XY
XZ
X[
X\
X]
X^
X_
X`
YW
YX
YY
YZ
Y[
RO[0]P Odd LVDS Signal +
RO[1]N Odd LVDS Signal -
RO[1]P Odd LVDS Signal +
RO[2]N Odd LVDS Signal -
RO[2]P Odd LVDS Signal +
GND Ground
ROCLK- Odd LVDS Clock -
ROCLK+ Odd LVDS Clock +
GND Ground
RO[3]N Odd LVDS Signal -
RO[3]P Odd LVDS Signal +
NC
NOTE1
NC
GND Ground
Z]
Z^
Z_
Z`
[W
[X
[Y
[Z
[[
[\
[]
[^
[_
[`
RE[3]P Even LVDS Signal +
NC
NOTE1
NC
GND Ground
NC
NC
NC
NC
NC
LVDS_SEL NOTE2
NC
NC
NC
NC
NOTE1
Y\
RE[0]N Even LVDS Signal -
\W
\X
NC
NC NOTE1
Note1) No Connection: These PINS are used only for SAMSUNG. (DO NOT CONNECT)
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Note(2) LVDS OPTION : If this PIN is HIGH (3.3 V) → Normal LVDS format
LOW (GND) → JEIDA LVDS format
SEQUENCE : On = V
OFF = Interface Signal(T3) ≥ LVDS Option ≥ V
Vin
LVDS
Option
LVDS
Signal
DD(T1) ≥ LVDS Option ≥ Interface Signal(T2)
DD
T2
LVDS Option Sequence
Note(3) Pin number starts from Left side
Samsung Secret
T3
PCB
Pin No. 1 Pin No. 51
#1 #51
#1
#51
Fig. Connector diagram
a. Power GND pins should be connected to the LCD’s metal chassis.
b. All power input pins should be connected together.
c. All NC pin should be separated from other signal or power.
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4.2. Converter Input Pin Configuration
Pin Configuration(FUNCTION)
Pin No.
1~5 24 V
6~10 GND
11 No connection
12 Backlight On /Off
13 Dimming Control [0V:Min, 3.3V:Max] *Note(1)
14 External PWM [1~100%] *Note(1)
Samsung Secret
Connector : Yeon-ho, 20022WR-14B1
Master
[ON:2.4 – 5.5 V, OFF: 0 - 0.8 V]
Note(1) If use Dimming Control, Pin 14 Must be N.C
If use External PWM, Pin 13 Must be N.C
4.3. Converter Input Power Sequence
Vin (24V)
0.02sec [Min]
Dimming Control
External PWM
0.5sec [Min]
0.2sec [Min]
Backlight On/Off
0sec [Min]
0.5sec [Min]
0 sec [Min]
Note) SEQUENCE : ON = Vin(24V) > Dimming Control ≥ Backlight On/Off
OFF = Backlight On/Off ≥ Dimming Control > Vin(24V)
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4.4 LVDS Interface
- LVDS Receiver : T-con (merged)
- Data Format (JEIDA & VESA)
TxOUT/RxIN0
Samsung Secret
LVDS pin JEIDA -DATA VESA -DATA
TxIN/RxOUT0 R2 R0
TxIN/RxOUT1 R3 R1
TxIN/RxOUT2 R4 R2
TxIN/RxOUT3 R5 R3
TxIN/RxOUT4 R6 R4
TxIN/RxOUT6 R7 R5
TxIN/RxOUT7 G2 G0
TxIN/RxOUT8 G3 G1
TxIN/RxOUT9 G4 G2
TxOUT/RxIN1
TxOUT/RxIN2
TxIN/RxOUT12 G5 G3
TxIN/RxOUT13 G6 G4
TxIN/RxOUT14 G7 G5
TxIN/RxOUT15 B2 B0
TxIN/RxOUT18 B3 B1
TxIN/RxOUT19 B4 B2
TxIN/RxOUT20 B5 B3
TxIN/RxOUT21 B6 B4
TxIN/RxOUT22 B7 B5
TxIN/RxOUT24 HSYNC HSYNC
TxIN/RxOUT25 VSYNC VSYNC
TxIN/RxOUT26 DEN DEN
TxIN/RxOUT27 R0 R6
TxIN/RxOUT5 R1 R7
TxIN/RxOUT10 G0 G6
TxOUT/RxIN3
TxIN/RxOUT11 G1 G7
TxIN/RxOUT16 B0 B6
TxIN/RxOUT17 B1 B7
TxIN/RxOUT23 RESERVED RESERVED
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Samsung Secret
4.5 Input Signals, Basic Display Colors and Gray Scale of Each Color
COLOR
BASIC
COLOR
GRAY
SCALE
OF
RED
DATA SIGNAL
DISPLAY
(8bit)
R0 R1 R2 R3 R4 R5 R6 R7 G0 G1 G2 G3 G4 G5 G6 G7 B0 B1 B2 B3 B4 B5 B6 B7
BLACK 000000000000000000000000 -
BLUE 000000000000000011111111 -
GREEN 000000001111111100000000 -
CYAN 000000001111111111111111 -
RED 111111110000000000000000 -
MAGENTA111111110000000011111111 -
YELLOW 111111111111111100000000 -
WHITE 111111111111111111111111 -
BLACK 000000000000000000000000 R0
100000000000000000000000 R1
DARK
↑
↓
LIGHT
010000000000000000000000 R2
:::::: :::::: ::::::
:::::: :::::: ::::::
101111110000000000000000 R253
011111110000000000000000 R254
RED GREEN BLUE
GRAY
SCALE
LEVEL
R3~
R252
GRAY
SCALE
OF
GREEN
GRAY
SCALE
OF
BLUE
RED 111111110000000000000000 R255
BLACK 000000000000000000000000 G0
000000001000000000000000 G1
DARK
↑
↓
LIGHT
GREEN 000000001111111100000000 G255
BLACK 000000000000000000000000 B0
DARK
↑
↓
LIGHT
BLUE 000000000000000011111111 B255
000000000100000000000000 G2
:::::: :::::: ::::::
:::::: :::::: ::::::
000000001011111100000000 G253
000000000111111100000000 G254
000000000000000010000000 B1
000000000000000001000000 B2
:::::: :::::: ::::::
:::::: :::::: ::::::
000000000000000010111111 B253
000000000000000001111111 B254
G3~
G252
B3~
B252
Note) Definition of Gray :
Rn : Red Gray, Gn : Green Gray, Bn : Blue Gray (n = Gray level)
Input Signal : 0 = Low level voltage, 1 = High level voltage
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5. Interface Timing
5.1 Timing Parameters ( DE mode )
SIGNAL ITEM SYMBOL MIN. TYP. MAX. Unit NOTE
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Samsung Secret
Clock
Hsync F
Frequency
Vsync F
1/T
C
H
V
130 148.5 155 MHz -
50 67.5 75 KHz -
48 60.0 62 Hz -
Active
- 1080 - Lines -
Vertical
Display
Period
T
VD
Display Term
Vertical
Total
T
V
1092 1125 1380 Lines -
Active
- 1920 - Clocks -
Horizontal
Display
Period
T
HD
Display Term
Horizontal
Total
T
H
2090 2200 2350 clocks -
Note) This product have to receive the input of Hsync & Vsync signal
(1) Test Point : TTL control signal and CLK at LVDS Tx input terminal in system
(2) Internal V
DD = 3.3V
(3) Spread spectrum
- Modulation rate (max) : · 1.5 %
- Modulation Frequency : under 100KHz
5.2 LVDS Input Data Characteristics
ITEM SYMBOL Min. Typ. Max. UNIT NOTE
t
Input Data
Position
Input common mode voltage V
Differential Input Voltage |V
=80MHz
F
IN
RSRM
t
RSLM
CM
| 100 - 600 mV -
ID
Note) When the skew is measured the Spread Spectrum should be 0%
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- - 400 ps
-400 - - ps
0.4 - 2.4 V -
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5.3 Timing diagrams of interface signal ( DE mode )
TV
TVD
DE
TH
THD
DE
Samsung Secret
DCLK
DATA
SIGNALS
TC
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5.4 Power ON/OFF Sequence
To prevent a latch-up or DC operation of the LCD Module, the power on/off
sequence should be as the diagram below.
2ms<T1≤10ms
0<T2≤50ms
0<T3≤50ms
1000ms≤T4
Samsung Secret
1000ms≤T5
(Recommend Value)
100ms≤T6
(Recommend Value)
T1 : VDDrising time from 10% to 90%
T2 : The time from V
to valid data at power ON.
DD
T3 : The time from valid data off to VDDoff at power Off.
T4 : VDDoff time for Windows restart
T5 : The time from valid data to B/L enable at power ON.
T6 : The time from valid data off to B/L disable at power Off.
The supply voltage of the external system for the Module input should be the same
as the definition of VDD.
Apply the lamp voltage within the LCD operation range. When the back light turns on
before the LCD operation or the LCD turns off before the back light turns off,
the display may momentarily show abnormal screen.
In case of V
= off level,
DD
please keep the level of input signals low or keep a high impedance.
T4 should be measured after the Module has been fully discharged between power off
and on period.
Interface signal should not be kept at high impedance when the power is on.
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Samsung Secret
T
B
D
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Samsung Secret
T
B
D
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7. PACKING
7.1 CARTON (Internal Package)
(1) Packing Form
Corrugated fiberboard box and corrugated cardboard as shock absorber
(2) Packing Method
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Samsung Secret
LCD Module
Packing Box
Pallet Plastic
7.2 Packing Specification
Direction to open
Item Specification Remark
LCD Packing
21 ea /
(Packing-Pallet Box)
1. 8.6 kg / LCD
2. Packing-Set(1ea) : 16Kg
3. Packing Material : Paper
Pallet 1Box / Pallet
Packing Direction Vertical
Total Pallet Size H x V x height 1150mm(H) x 985mm(V) x 711mm(height)
Total Pallet Weight 205.24 kg
1. Pallet weight = 7.8kg
Pallet(7.8kg) + Module (180.6 kg) + Packing
set(16kg) + Desiccant (0.04 x21 = 0.84Kg)
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Samsung Secret
8. MARKING & OTHERS
A nameplate bearing followed by is affixed to a shipped product at the specified
location on each product.
(1) Part number :
(2) Revision: Three letters
(3) Lot number : X X X X XXX
(4) Nameplate Indication
LTA400HM21
LTA400HM21
[[[[[[[[[[ [[[
XX X
Cell Position No. (In the Glass)
Glass No. (In the one Lot)
Lot No. (Glass)
Month
Year (Note1)
Product code
Line
Week code : 05 29
week
year
40mm
80mm
(5) Packing box attach
100mm
OWD733KP54
[[[
54
165mm
(6) Others
1. After service part
Lamps cannot be replaced because of the narrow bezel structure.
Revision code
Lot number
Part number
Box serial number
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9. General Precautions
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9.1 Handling
(a) When the Module is assembled, it should be attached to the system firmly
using all mounting holes. Be careful not to twist and bend the Module.
(b) Because the converter use high voltage, it should be disconnected from power
before it is assembled or disassembled.
(c) Refrain from strong mechanical shock and / or any force to the Module.
In addition to damage, this may cause improper operation or damage to the Module
and LED back light.
(d) Note that polarizers are very fragile and could be damage easily.
Do not press or scratch the surface harder than a HB pencil lead.
(e) Wipe off water droplets or oil immediately. If you leave the droplets for a long
time, staining or discoloration may occur.
(f) If the surface of the polarizer is dirty, clean it using absorbent cotton or soft cloth.
(g) Desirable cleaners are water, IPA (Isopropyl Alcohol) or Hexane.
Do not use ketone type materials (ex. Acetone), Ethyl alcohol, Toluene, Ethyl acid
or Methyl chloride. It might permanent damage to the polarizer due to chemical
reaction.
(h) If the liquid crystal material leaks from the panel, it should be kept away
from the eyes or mouth . In case of contact with hands, legs or clothes, it must
be washed away with soap thoroughly.
(i) Protect the module from Electrostatic discharge. Otherwise the ASIC IC or
Semiconductor would be damaged.
(j) Use finger-stalls with soft gloves in order to keep display clean during the
incoming inspection and assembly process.
(k) Do not disassemble the Module.
(l) Do not disassemble shield case of converter & C-PBA.
(m) Do not connect N.C pins. (Samsung internal use only)
(n) Protection film for polarizer on the Module should be slowly peeled off just before use
so that the electrostatic charge can be minimized. Must put on antistatic glove while
handle a module
(o) Pins of I/F connector should not be touched directly with bare hands.
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9.2 Storage
We highly recommend to comply with the criteria in the table below.
Item Unit Min. Max.
Samsung Secret
Storage
Temperature
()
10 40
Storage Humidity (%rH) 35 75
Storage Life 6 Months
- The storage room should provide good ventilation and temperature
control.
- Products should not be placed on the floor, but on the Pallet away
from
a wall.
- Prevent products from direct sunlight, moisture nor water; Be
cautious of
Storage
Condition
a build up of condensation.
- Avoid other hazardous environment while storing goods.
- If products delivered or kept in conditions of over the storage period
of 3
months, the recommended temperature or humidity range,
we recommend you leave them at a temperature of 20 and a
humidity
of 50% for 24 hours.
9.3 Operation
(a) Do not connect or disconnect the Module in the "Power On" condition.
(b) Power supply should always be turned on/off by the "Power on/off sequence"
(c) Module has high frequency circuits. Sufficient suppression to the electromagnetic
interference should be done by system manufacturers. Grounding and shielding methods
may be important to minimize the interference.
(d) The cable between the back light connector and its converter power supply should
be connected directly with a minimized length. A longer cable between
the back light and the converter may cause lower luminance of LED and
may require higher startup voltage(Vs).
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9.4 Operation Condition Guide
(a
) The LCD product should be operated under normal conditions.
Samsung Secret
Normal condition is defined as below;
- Temperature : 20·15
- Humidity : 55·20%
- Display pattern : continually changing pattern (Not stationary)
(b) If the product will be used in extreme conditions such as high temperature,
humidity, display patterns or operation time etc.., It is strongly recommended
to contact SEC for Application engineering advice. Otherwise, its reliability and
function may not be guaranteed. Extreme conditions are commonly found at
Airports, Transit Stations, Banks, Stock market, and Controlling systems.
9.5 Others
(a) Ultra-violet ray filter is necessary for outdoor operation.
(b) Avoid condensation of water. It may result in improper operation or disconnection
of electrode.
(c) Do not exceed the absolute maximum rating value. ( supply voltage variation,
input voltage variation, variation in part contents and environmental temperature,
and so on)
Otherwise the Module may be damaged.
(d) If the Module keeps displaying the same pattern for a long period of time,
the image may be "sticked" to the screen.
To avoid image sticking, it is recommended to use a screen saver.
(e) This Module has its circuitry PCB's on the rear side and should be handled
carefully in order not to be stressed.
(f) Please contact SEC in advance when you display the same pattern for a long time.
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