8. General Precaution ---------------------------------------------------------------------------- (36)
8.1 Handling
8.2 Storage
8.3 Operation
8.4 Others
2/35PageLTM240CS08_000_080401MODEL
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PRODUCT INFORMATION
General Description
PRODUCT INFORMATION
Description
LTM240CS08 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 24.0” is 1920
x 1200 and this model can display up to 16.7 millions colors.
Features
High contrast ratio, high aperture structure
S-PVA (Super Patterned Vertical Alignment) mode
Wide viewing angle
High speed response
WUXGA (1920 x 1200 pixels) resolution
Direct Type B/L Unit with 7 U type CCFTs (Cold Cathod Fluorescent Tube)
DE (Data Enable) mode
LVDS (Low Voltage differential Signaling) interface (2pixel/clock)
RoHS compliance
Pb-free compliance
Applications
Workstation & desktop monitors
Display terminals for AV application products
Monitors for industrial machine
* If the module is used to other applications besides the above, please contact SEC
* C.G.L : Color Grayscale Linearity (continue to the next page)
Green
Blue
White
△u'v'White
0.313Wx
0.329Wy
-TBD-Ru'
-TBD-Rv'
-TBD-Gu'
-TBD-Gv'
-TBD-Bu'
-TBD-Bv'
-0.198-Wu'
-0.468-Wv'
(7),(8)
SR-3
(9)0.02--
6/35PageLTM240CS08_000_080401MODEL
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PRODUCT INFORMATION
PRODUCT INFORMATION
NoteUnitMax.Typ.Min.ConditionSymbolItem
%-92--Color Gamut
K-6500--Color Temperature
θ
Hor.
Viewing
Angle
Ver.
Hor.
Viewing
Angle
Ver.
L
θ
R
θ
U
θ
D
θ
L
θ
R
θ
U
θ
D
Brightness Uniformity
(13 Points)
uni
Note (1) Test Equipment Setup
The measurement should be executed in a stable, windless and dark room between
30min after lighting the back light at the given temperature for stabilization
of the back light. This should be measured in the center of screen.
Single lamp current : 6.0mA
Environment condition : Ta = 25 ± 2 °C
CR≥10
CR≥100
-8980
-8980
Degrees
-8980
-8980
-7565
(8) EZ-
Contrast
-7565
Degrees
-6555
-6555
%25--B
(4)
SR-3
Field Photo detector
2°SR-3
TFT - LCD Module
Photo detector
Field
SR-3 : 50㎝
RD-80S : 50㎝
LCD Panel
The center of the screen
7/35PageLTM240CS08_000_080401MODEL
Page 8
Note (2) Definition of test point
192 960 1728
PRODUCT INFORMATION
PRODUCT INFORMATION
Active Area
6
: Test Point
Note (3) Definition of Contrast Ratio (C/R)
: Ratio of gray max (Gmax) & gray min (Gmin) at the center point⑦ of the panel
G
CR
max
=
G
min
321
879
45
120
600
1080
Note (4) Definition of 13 points brightness uniformity (Full White pattern)
BB
Buni
=×
Bmax : Maximum brightness
Bmin : Minimum brightness
: Average response time of ones between above grays
Time
Gray to Gray
Response
White
100%
90%
10%
0%
Black
T
96 gray128 gray95 gray127 gray
r
T
f
9/35PageLTM240CS08_000_080401MODEL
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PRODUCT INFORMATION
PRODUCT INFORMATION
Note (6) Definition of Luminance of White : Luminance of white at center point⑤
Note (7) Definition of Color Chromaticity (CIE 1931, CIE1976)
Color coordinate of Red, Green, Blue & White at center point⑤
Note (8) Definition of Viewing Angle
: Viewing angle range (CR ≥10, CR ≥100)
10/35PageLTM240CS08_000_080401MODEL
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PRODUCT INFORMATION
PRODUCT INFORMATION
Note (9) Color Grayscale Linearity
a. Test image : 100% full white pattern with a test pattern as below
b. Test pattern : Squares, 40mm by 40mm in size, filled with 255, 225, 195, 165, 135 and
105 grays steps should be arranged at the center⑤ of the screen.
c. Test method
st
gray step : move a square of 255 gray level should be moved into the center of
-1
the screen and measure luminance and u’ and v’ coordinates.
- Next gray step : Move a 225 gray square into the center and measure both
luminance and coordinates, too.
d. Test evaluation
∆u'v'=(u'-u' )+(v'-v' )AB
Where A, B : 2 gray levels found to have the largest color differences between them
i.e. get the largest Δu’ and Δv’ of each 6 pair of u’ and v’ and calculate the Δu’v’.
2
AB
2
11/35PageLTM240CS08_000_080401MODEL
Page 12
3. Electrical Characteristics
3.1 TFT LCD Module
The connector for display data & timing signal should be connected.
PRODUCT INFORMATION
PRODUCT INFORMATION
Ta = 25°C
NoteUnitMax.Typ.Min.SymbolItem
Voltage of Power Supply
Differential Input
Voltage for LVDS
Receiver Threshold
LVDS skew
LVDS
Differential input
Input
Characteri
stics
Input voltage range
(single-ended)
Common mode
Input current
Current of
Power
Supply
voltage
voltage
(a) Black
DD
SKEW
IN
V
CM
IN
I
DD
|V
0+
ID
|/2
1.2
2.4-
|V
±10I
(1)V13.212.010.8V
(2)mV+100--High
mV---100Low
(3)300-300t
(4)mV600200|VID|
(4)V2.40V
|/2
ID
(4)V
㎂
mA-TBDmA-TBD-(b) White(5),(6)
mATBDTBD-(c) Dot
Vsync Frequency
Hsync Frequency
Main Frequency
Rush Current
V
H
DCLK
RUSH
Note (1) The ripple voltage should be controlled under 10% of VDD.
Hz636057f
kHz78.57469f
MHz81.077.072.0f
(7)A5.0--I
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PRODUCT INFORMATION
PRODUCT INFORMATION
(2) Differential receiver voltage definitions and propagation delay and transition time test circuit
a. All input pulses have frequency = 10MHz, t
b. C
includes all probe and fixture capacitance
L
or tF=1ns
R
Note a.
Note b.
(3) LVDS Receiver DC parameters are measured under static and steady conditions
which may not be reflective of its performance in the end application.
T
LVDS Clk
V
= 0V
DIFF
LVDS Data
RX +/-
t
SKEW
where tskew : skew between LVDS clock & LVDS data,
T : 1 period time of LVDS clock
cf) (-/+) of 380psec means LVDS data goes before or after LVDS clock.
(4) Definition of V
ID
and V
using single-end signals
CM
V
= 0V
DIFF
Differential
Differential
13/35PageLTM240CS08_000_080401MODEL
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PRODUCT INFORMATION
PRODUCT INFORMATION
(5) fV=60Hz, fDCLK = 77MHz, VDD = 12.0V, DC Current.
(6) Power dissipation check pattern (LCD Module only)
a) Black Pattern b) White Pattern c) Dot Pattern
(7) Measurement Condition
100%
90%
V
DD
10%
GND
Rush Current I
T
RUSH
can be measured when T
RUSH
=1.0ms
. is 1.0ms
RUSH
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PRODUCT INFORMATION
PRODUCT INFORMATION
3.2 Back Light Unit
The back light unit is a direct lighting with 7 U-type CCFTs (Cold Cathode Cathode
Fluorescent Tube ). The characteristics of two dual lamps are shown in the following tables.
Ta=25 ± 2°C
NoteUnitMax.Typ.Min.SymbolItem
Lamp Current
Lamp Voltage
Lamp Frequency
L
L
L
Inverter
waveform
Note (1) Specified values are for a single lamp.
Lamp current is measured with current meter for high frequency as shown below.
Refer to the following block diagram of the back light unit for more information.
(1)mArms7.06.05.0I
@6.0mA%10030PWM Dimming Duty
Vrms-1,740-V
(3)kHz60-40f
(4)Hour--30,000HrOperating Life Time
%10--WasyAsymmetry rate
(5)
1.55541.4141.2726WdisDistortion rate
0℃ : 2,840
--VsStartup Voltage
(6)Vrms
25℃: 2,280
Inverter
Inverter
PINK
WHITE
PINK
WHITE
PINK
WHITE
PINK
WHITE
PINK
WHITE
PINK
WHITE
PINK
WHITE
LCD Module
Fig. Measurement point of Lamp Current
15/35PageLTM240CS08_000_080401MODEL
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PRODUCT INFORMATION
−
PRODUCT INFORMATION
(2) Lamp frequency which may produce interference with horizontal synchronous
frequency may cause line flow on the display. Therefore lamp frequency should be
detached from the horizontal synchronous frequency and its harmonics as far as
possible in order to avoid interference.
(3) Life time (Hr) is defined as the time when brightness of a lamp unit itself becomes
50% or less than its original value at the condition of Ta = 25±2°C and IL= 6.0mArms
(4) Designing a system inverter intended to have better display performance, power
efficiency and lamp reliability.
They would help increase the lamp lifetime and reduce leakage current.
a. The measurement should be done at typical lamp current.
b. The asymmetry rate of the inverter waveform should be less than 10%.
c. The distortion rate of the waveform should be √2 with ±10% tolerance.
- Inverter output waveform had better be more similar to ideal sine wave.
Asymmetry rate
p-p
I
p
I
-p
Fig. Wave form of the inverter
(5) If an inverter has shutdown function, it should keep its output for over 1 second
even if the lamp connector is open. Otherwise the lamps may not be turned on.
||II
I
rms
Distortion rate
I
p
||
I
or
rms
× 100
I
-p
||
I
rms
16/35PageLTM240CS08_000_080401MODEL
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4. BLOCK DIAGRAM
4.1 TFT LCD Module
PRODUCT INFORMATION
PRODUCT INFORMATION
4.2 Back Light Unit
HOT 1, 2
HOT 3, 4
HOT 5, 6
HOT 7, 8
HOT 9, 10
HOT 11, 12
HOT 13, 14
Connector : YEONHO 20015HS-04LB or equivalent
WHITE
CCFL 1
CCFL 2
CCFL 3
CCFL 4
CCFL 5
CCFL 6
CCFL 7
CN1
PINK
WHITE
CN2
PINK
WHITE
CN3
PINK
WHITE
CN4
PINK
WHITE
CN5
PINK
WHITE
CN6
PINK
WHITE
CN7
PINK
17/35PageLTM240CS08_000_080401MODEL
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PRODUCT INFORMATION
5. Input Terminal Pin Assignment
PRODUCT INFORMATION
5.1.1 Input Signal & Power ( Connector : UJU, IS100-L30O-C23 or equivalent )
FUNCTIONSYMBOLPIN NO
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
RXO0P
RXO1N
Negative LVDS differential data outputRXO0N
Positive LVDS differential data output
Negative LVDS differential data output
Positive LVDS differential data outputRXO1P
Negative LVDS differential data outputRXO2N
Positive LVDS differential data outputRXO2P
GroundGND
Negative Sampling Clock (ODD data)RXOCPositive Sampling Clock (ODD data)RXOC+
Negative LVDS differential data outputRXO3N
Positive LVDS differential data outputRXO3P11
Negative LVDS differential data outputRXE0N
Positive LVDS differential data outputRXE0P
GroundGND
Negative LVDS differential data outputRXE1N
Positive LVDS differential data outputRXE1P
17
18
20
21
23
24
25
26
28
29
30
VDD
VDD
VDD
GroundGND
Negative LVDS differential data outputRXE2N
Positive LVDS differential data outputRXE2P19
Negative Sampling Clock (EVEN data)RXEC-
Positive Sampling Clock (EVEN data)RXEC+
Negative LVDS differential data outputRXE3N22
Positive LVDS differential data outputRXE3P
GroundGND
DDC ClockCLK_EDID
DDC DataDATA_EDID
DDC Power 3.3VV_EDID27
Power Supply : +12V (typ)
18/35PageLTM240CS08_000_080401MODEL
Page 19
Note) Pin number starts from Left side
Source PCB
▼
Pin No. 1 Pin No. 30
▼
#1
PRODUCT INFORMATION
PRODUCT INFORMATION
#30
#1
Fig. Connector diagram
a. All GND pins should be connected together and also be connected to the
LCD’s metal chassis.
b. All power input pins should be connected together.
c. All NC pins should be separated from other signal or power.
#30
19/35PageLTM240CS08_000_080401MODEL
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5.2 LVDS Interface
5.2.1 Odd Pixel Data (1st pixel data)
1st LVDS Transmitter ( DS90C383, DS90C385 ) Signal Interface
PRODUCT INFORMATION
PRODUCT INFORMATION
Device Input SignalDevice Input Pin
Red Odd Pixel Data (LSB) RO0TXIN0 51
Red Odd Pixel Data RO1TXIN1 52
Red Odd Pixel Data RO2TXIN2 54
Red Odd Pixel Data RO3TXIN3 55
Red Odd Pixel Data RO4TXIN4 56
Red Odd Pixel Data (MSB) RO7TXIN5 2
Red Odd Pixel Data RO5TXIN6 3
Green Odd Pixel Data (LSB)GO0TXIN7 4
Green Odd Pixel Data GO1TXIN8 6
Green Odd Pixel Data GO2TXIN9 7
Green Odd Pixel Data GO6TXIN108
Green Odd Pixel Data (MSB)GO7TXIN1110
Output
Signal
TXOUT0-
TXOUT0+
TXOUT3-
TXOUT3+
TXOUT0-
TXOUT0+
TXOUT1-
TXOUT1+
TXOUT3-
TXOUT3+
To LTM240CS08
Interface ( CN1 )
SymbolTerminalFunctionSymbolSymbolNo
No. 1
No. 2
No. 10
No. 11
No. 1
No. 2
No. 3
No. 4
No. 10
No. 11
RXO0-
RXO0+
RXO3-
RXO3+
RXO0-
RXO0+
RXO1-
RXO1+
RXO3-
RXO3+
Green Odd Pixel Data GO3TXIN1211
Green Odd Pixel Data GO4TXIN1312
Green Odd Pixel Data GO5TXIN1414
Blue Odd Pixel Data (LSB) BO0TXIN1515
Blue Odd Pixel Data BO6TXIN1616
Blue Odd Pixel Data (MSB) BO7TXIN1718
Blue Odd Pixel Data BO1TXIN1819
Blue Odd Pixel Data BO2TXIN1920
Blue Odd Pixel Data BO3TXIN2022
Blue Odd Pixel Data BO4TXIN2123
Blue Odd Pixel Data BO5TXIN2224
Red Odd Pixel Data RO6TXIN2750
TXOUT1-
TXOUT1+
TXOUT3-
TXOUT3+
TXOUT1-
TXOUT1+
TXOUT2-
TXOUT2+
TXOUT3-
TXOUT3+
No. 3
No. 4
No. 10
No. 11
No. 3
No. 4
No. 5
No. 6
No. 10
No. 11
RXO1-
RXO1+
RXO3-
RXO3+
RXO1-
RXO1+
RXO2-
RXO2+
RXO3-
RXO3+
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5.2.2 Even Pixel Data (2nd pixel data)
2nd LVDS Transmitter ( DS90C383, DS90C385 ) Signal Interface
PRODUCT INFORMATION
PRODUCT INFORMATION
Device Input SignalDevice Input Pin
Red Even Pixel Data (LSB) RE0TXIN0 51
Red Even Pixel Data RE1TXIN1 52
Red Even Pixel Data RE2TXIN2 54
Red Even Pixel Data RE3TXIN3 55
Red Even Pixel Data RE4TXIN4 56
Red Even Pixel Data (MSB) RE7TXIN5 2
Red Even Pixel Data RE5TXIN6 3
Green Even Pixel Data (LSB)GE0TXIN7 4
Green Even Pixel Data GE1TXIN8 6
Green Even Pixel Data GE2TXIN9 7
Green Even Pixel Data GE6TXIN108
Green Even Pixel Data (MSB)GE7TXIN1110
Output
Signal
TXOUT0-
TXOUT0+
TXOUT3-
TXOUT3+
TXOUT0-
TXOUT0+
TXOUT1-
TXOUT1+
TXOUT3-
TXOUT3+
To LTM240CS08
Interface ( CN1 )
SymbolTerminalFunctionSymbolSymbolNo
No. 12
No. 13
No. 22
No. 23
No. 12
No. 13
No. 15
No. 16
No. 22
No. 23
RXE0-
RXE0+
RXE3-
RXE3+
RXE0-
RXE0+
RXE1-
RXE1+
RXE3-
RXE3+
Green Even Pixel Data GE3TXIN1211
Green Even Pixel Data GE4TXIN1312
Green Even Pixel Data GE5TXIN1414
Blue Even Pixel Data (LSB) BE0TXIN1515
Blue Even Pixel Data BE6TXIN1616
Blue Even Pixel Data (MSB) BE7TXIN1718
Blue Even Pixel Data BE1TXIN1819
Blue Even Pixel Data BE2TXIN1920
Blue Even Pixel Data BE3TXIN2022
Blue Even Pixel Data BE4TXIN2123
Blue Even Pixel Data BE5TXIN2224
Red Even Pixel Data RE6TXIN2750
TXOUT1-
TXOUT1+
TXOUT3-
TXOUT3+
TXOUT1-
TXOUT1+
TXOUT2-
TXOUT2+
TXOUT3-
TXOUT3+
No. 15
No. 16
No. 22
No. 23
No. 15
No. 16
No. 18
No. 19
No. 22
No. 23
RXE1-
RXE1+
RXE3-
RXE3+
RXE1-
RXE1+
RXE2-
RXE2+
RXE3-
RXE3+
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5.3 LVDS Interface(2)
5.3.1 Odd Pixel Data (1st pixel data)
LVDS Transmitter ( DS90C387 ) Signal Interface
PRODUCT INFORMATION
PRODUCT INFORMATION
Device Input SignalDevice Input Pin
Red Odd Pixel Data (LSB) RO0R1010
Red Odd Pixel Data RO1R119
Red Odd Pixel Data RO2R12 8
Red Odd Pixel Data RO3R13 7
Red Odd Pixel Data RO4R14 6
Red Odd Pixel Data (MSB) RO7R17 3
Red Odd Pixel Data RO5R15 5
Green Odd Pixel Data (LSB)GO0G10 2
Green Odd Pixel Data GO1G11 1
Green Odd Pixel Data GO2G12100
Green Odd Pixel Data GO6G1694
Green Odd Pixel Data (MSB)GO7G1793
Output
Signal
A0M
A0P
A3M
A3P
A0M
A0P
A1M
A1P
A3M
A3P
To LTM240CS08
Interface ( CN1 )
SymbolTerminalFunctionSymbolSymbolNo
No. 1
No. 2
No. 10
No. 11
No. 1
No. 2
No. 3
No. 4
No. 10
No. 11
RXO0-
RXO0+
RXO3-
RXO3+
RXO0-
RXO0+
RXO1-
RXO1+
RXO3-
RXO3+
Green Odd Pixel Data GO3G1399
Green Odd Pixel Data GO4G1496
Green Odd Pixel Data GO5G1595
Blue Odd Pixel Data (LSB) BO0B1092
Blue Odd Pixel Data BO6B1686
Blue Odd Pixel Data (MSB) BO7B1785
Blue Odd Pixel Data BO1B1191
Blue Odd Pixel Data BO2B1290
Blue Odd Pixel Data BO3B1389
Blue Odd Pixel Data BO4B1488
Blue Odd Pixel Data BO5B1587
Red Odd Pixel Data RO6R164
A1M
A1P
A3M
A3P
A1M
A1P
A2M
A2P
A3M
A3P
No. 3
No. 4
No. 10
No. 11
No. 3
No. 4
No. 5
No. 6
No. 10
No. 11
RXO1-
RXO1+
RXO3-
RXO3+
RXO1-
RXO1+
RXO2-
RXO2+
RXO3-
RXO3+
22/35PageLTM240CS08_000_080401MODEL
Page 23
5.3.2 Even Pixel Data (2nd pixel data)
LVDS Transmitter ( DS90C387 ) Signal Interface
PRODUCT INFORMATION
PRODUCT INFORMATION
Device Input SignalDevice Input Pin
Red Even Pixel Data (LSB) RE0R2084
Red Even Pixel Data RE1R2181
Red Even Pixel Data RE2R22 80
Red Even Pixel Data RE3R23 79
Red Even Pixel Data RE4R24 78
Red Even Pixel Data (MSB) RE7R27 75
Red Even Pixel Data RE5R25 77
Green Even Pixel Data (LSB)GE0G20 74
Green Even Pixel Data GE1G21 73
Green Even Pixel Data GE2G22 72
Green Even Pixel Data GE6G2666
Green Even Pixel Data (MSB)GE7G2765
Output
Signal
A4M
A4P
A7M
A7P
A4M
A4P
A5M
A5P
A7M
A7P
To LTM240CS08
Interface ( CN1 )
SymbolTerminalFunctionSymbolSymbolNo
No. 12
No. 13
No. 22
No. 23
No. 12
No. 13
No. 15
No. 16
No. 22
No. 23
RXE0-
RXE0+
RXE3-
RXE3+
RXE0-
RXE0+
RXE1-
RXE1+
RXE3-
RXE3+
Green Even Pixel Data GE3G2371
Green Even Pixel Data GE4G2470
Green Even Pixel Data GE5G2569
Blue Even Pixel Data (LSB) BE0B2064
Blue Even Pixel Data BE6B2658
Blue Even Pixel Data (MSB) BE7B2757
Blue Even Pixel Data BE1B2163
Blue Even Pixel Data BE2B2262
Blue Even Pixel Data BE3B2361
Blue Even Pixel Data BE4B2460
Blue Even Pixel Data BE5B2559
Red Even Pixel Data RE6R2676
A5M
A5P
A7M
A7P
A5M
A5P
A6M
A6P
A7M
A7P
No. 15
No. 16
No. 22
No. 23
No. 15
No. 16
No. 18
No. 19
No. 22
No. 23
RXE1-
RXE1+
RXE3-
RXE3+
RXE1-
RXE1+
RXE2-
RXE2+
RXE3-
RXE3+
23/35PageLTM240CS08_000_080401MODEL
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5.3.3 Timing Diagrams of LVDS For Transmitting
LVDS Receiver : Integrated T-CON
PRODUCT INFORMATION
PRODUCT INFORMATION
Note (1) R/G/B[7]s are MSBs and R/G/B[0]s are LSBs.
24/35PageLTM240CS08_000_080401MODEL
Page 25
5.4 Back Light Unit
PRODUCT INFORMATION
PRODUCT INFORMATION
FunctionColorInputPin No.
High VoltageWHITEHOT1-1
High VoltagePINKHOT1-2
High VoltageWHITEHOT2-1
High VoltagePINKHOT2-2
High VoltageWHITEHOT3-1
High VoltagePINKHOT3-2
High VoltageWHITEHOT4-1
High VoltagePINKHOT4-2
High VoltageWHITEHOT5-1
High VoltagePINKHOT5-2
High VoltageWHITEHOT6-1
Connector
Part No.
High VoltagePINKHOT6-2
High VoltageWHITEHOT7-1
HOT7-2
YEONHO 20015HS-04LB or equivalent
High VoltagePink
25/35PageLTM240CS08_000_080401MODEL
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PRODUCT INFORMATION
PRODUCT INFORMATION
5.5 Input Signals, Basic Display Colors and Gray Scale of Each Color
Rn : Red Gray, Gn : Green Gray, Bn : Blue Gray (n = Gray level)
Input Signal : 0 = Low level voltage, 1 = High level voltage
26/35PageLTM240CS08_000_080401MODEL
Page 27
6. Interface Timing
6.1 Timing Parameters ( DE only mode )
PRODUCT INFORMATION
PRODUCT INFORMATION
NOTEUnitMAX.TYP.MIN.SYMBOLITEMSIGNAL
Clock
Hsync
Vsync
Frequency
C
H
V
Active
Vertical
Display
Period
VD
Display Term
Vertical
Total
VB
Active
Horizontal
Display
Period
HD
Display Term
Horizontal
Total
H
Note (1) This product is DE only mode. The input of Hsync & Vsync signal does
not have an effect on normal operation.
(2) Test Point : TTL control signal and CLK at LVDS Tx input terminal in system
-MHz81.077.072.01/T
-KHz78.57469F
-Hz636057F
-lines120012001200T
-lines124512351209T
-clocks960960960T
-clocks10751040993T
(3) Internal Vcc = 3.3V
27/35PageLTM240CS08_000_080401MODEL
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PRODUCT INFORMATION
PRODUCT INFORMATION
6.2 Timing diagrams of interface signal ( DE only mode )
TV
DE
DE
DCLK
DATA
SIGNALS
TVD
TVB
TH
THD
TC
TC
DCLK
DISPLAY
DATA
DE
TCH
TDSTDH
TES
TCL
0.5
V
0.5
V
CC
0.5
V
CC
CC
28/35PageLTM240CS08_000_080401MODEL
Page 29
PRODUCT INFORMATION
PRODUCT INFORMATION
6.3 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.
300㎲≤T1≤10msec
0≤T2≤50msec
0≤T3≤50msec
1sec≤T4
Back-Light
(Recommended)
500msec≤T5
100msec≤T6
T1 : VDDrising time from 10% to 90%
T2 : The time from V
T3 : The time from valid data off to V
T4 : V
off time for Windows restart
DD
to valid data at power ON.
DD
off at power Off.
DD
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 V
DD
.
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.
29/35PageLTM240CS08_000_080401MODEL
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6.5 VDD Power Dip Condition
V
DD
90%
PRODUCT INFORMATION
PRODUCT INFORMATION
T
d
80%
V
CC
GND
10.8 ≤ VDD≤ 13.2V
(typ.) x 80% ≤ VCC ≤ VDD(typ) x 90%
If V
DD
Then, 0<Td ≤20msec
Note(1) The above conditions are for the glitch of the input voltage.
(2) For stable operation of an LCD Module power, please follow them.
i.e., if typ VDD x 80% ≤ Vcc ≤ typ VDD x 90%, then T
should be less than 20ms.
d
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7. Outline Dimension
[ Refer to the next page ]
PRODUCT INFORMATION
PRODUCT INFORMATION
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Page 33
PRODUCT INFORMATION
8. General Precautions
PRODUCT INFORMATION
8.1 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 inverter uses high voltages, it should be disconnected from power
source before it is assembled or disassembled.
(c) Refrain from strong mechanica l s hock and / or any force to the module.
In addition to damage, it may cause improper operation or damage to the module
and CCFT back light.
(d) Note that polarizer films are very fragile and could be damaged 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 cause 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 static, or the CMOS Gate Array IC 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 pull or fold the lamp wire.
(m) Do not adjust the variable resistor located on the Module.
(n) Protection film for polarizer on the Module should be slowly peeled off just before use
so that the electrostatic charge can be minimized.
(o) Pins of I/F connector should not be touched directly with bare hands.
33/35PageLTM240CS08_000_080401MODEL
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PRODUCT INFORMATION
PRODUCT INFORMATION
8.2 Storage
(a) Do not leave the Module in high temperature, and high humidity for a long time.
It is highly recommended to store the Module with temperature from 0 to 35℃
and relative humidity of less than 70%.
(b) Do not store the TFT- L CD Module in direct sunlight.
(c) The Module should be stored in a dark place. It is prohibited to apply sunlight or
fluorescent light in storing.
8.3 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 item 6.3
"Power on/off sequence"
(c) Module has high frequency circuits. Sufficient suppression to the electromagnetic
interference should be done by system manufacturers. G rounding and shielding
methods may be important to minimize the interference.
(d) The cable between the back light connector and its inverter power supply should
be connected directly with a minimized length. A longer cable between
the back light and the inverter may cause lower luminance of lamp(CCFT) and
may require higher startup voltage(Vs).
8.4 Operation Condition Guide
(a) The LCD product should be operated under normal conditions.
(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. Other wise, its reliability and
function may not be guaranteed. Extreme conditions are commonly found at
Airports, Transit Stations, Banks, Stock market, and Controlling systems.
34/35PageLTM240CS08_000_080401MODEL
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PRODUCT INFORMATION
PRODUCT INFORMATION
8.5 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.
35/35PageLTM240CS08_000_080401MODEL
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