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Preliminary
TO DATE
: USA customer : 1998. 5. 04
SAMSUNG TFT-LCD SAMSUNG TFT-LCD
MODEL NO. :: LT121S1-105 MODEL NO. LT121S1-105
NOTE :
Any Modification of Spec is not allowed without SEC'permission
PREPARED BY :
Application Engineering Group
SAMSUNG ELECTRONICS CO., LTD.
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Preliminary
CONTENTS
Revision History General Description 1. Absolute Maximum Ratings 1.1 Absolute Ratings Of Environment 1.2 Electrical Absolute Ratings 2. Optical Characteristics 3. Electrical Characteristics 3.1 TFT LCD Module 3.2 Backlight Unit 4. Block Diagram 4.1 TFT LCD Module 4.2 Backlight Unit -------------------( 3 ) -------------------( 4 ) -------------------( 5 )
-------------------( 7 ) - - - - - - - - - - - - - - - - - - - ( 11 )
- - - - - - - - - - - - - - - - - - - ( 14 )
- - - - - - - - - - - - - - - - - - - ( 15 ) 5. Input Terminal Pin Assignment 5.1 Input Signal & Power 5.2 Backlight Unit 5.3 Pixel format 5.4 Input Signals, Basic Display Colors and Gray Scale of Each Color. 6. Interface Timing 6.1 Timing Parameters 6.2 Timing Diagrams of interface Signal 6.3 Power ON/OFF Sequence 7. Outline Dimension 8. General Precaution - - - - - - - - - - - - - - - - - - - ( 18 )
- - - - - - - - - - - - - - - - - - - ( 21 ) - - - - - - - - - - - - - - - - - - - ( 22 )
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Revision History Revision History
Date Rev.No. 000 002 Page ALL 19-23 15 11 1 4 5 Summary LT121S1 - 105 model was First issued.
Preliminary
Nov. 22.1996 Mar. 10.1997
Attached packing, marking & others, general precautions. Insert 5.4 pixel format Lamp voltage max value in 3.2 Backlight unit table is erased. Change the notice ( Any Modification of Spec is Not allowed without SEC' permission -> The content of SPEC can be changed without notice) s Change General Specifications -> General Information. Change the item Mechanical Specifications Change Mechanical Specifications -> Mechanical Information Remove the contents (1) Lmp current = ( ) mA Add the NOTE (5) Remove the GND indication of Inverter.
Sep. 18.1997
003
Jan. 13.1998
004
13
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GENERAL DESCRIPTION
DESCRIPTION
Preliminary
LT121S1-105 is a color active matrix TFT (Thin Film Transistor) liquid crystal display (LCD) that uses amorphous silicon TFT as a switching devices. This model is composed of a TFT LCD panel, a driver circuit and a backlight system. The resolution of a 12.1" contains 800 x 600 pixels and can display up to 262,144 colors. 6 o'clock direction is the optimum viewing angle. FEATURES * Thin and light weight * High contrast ratio * SVGA (800 x 600 pixels) resolution * Low power consumption * DE (Data enable) only mode.
APPLICATIONS * Notebook PC and desktop monitors * Display terminals for AV application products * Monitors for Industrial machine * If the usage of this product is not for PC application, but for others, please contact SEC.
General Information
ITEM Display area Driver element Display colors Number of pixel Pixel arrangement Pixel pitch Display Mode Surface treatment SPECIFICATION 246.0(H) x 184.5(V) (12.1"diagonal ) a-si TFT active matrix 262,144 800 x 600 RGB vertical stripe 0.3075(H) x 0.3075(V) (TYP.) Normally white Haze 25, Hard-Coating (3H) pixel mm UNIT mm NOTE
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Preliminary
Mechanical Information
ITEM Horizontal (H) Module size Vertical (V) Depth (D) Weight MIN. 274.5 199.5 TYP. 275.0 200.0 MAX. 275.5 200.5 8.0 530g NOTE
1. ABSOLUTE MAXIMUM RATINGS
1.1 ABSOLUTE RATINGS OF ENVIRONMENT
ITEM Storage temperature Operating temperature (Temperature of glass surface) Shock ( nonoperating ) SYMBOL TSTG MIN. -25 MAX. 60 UNIT
OC
NOTE (1) (1) (2),(4)
TOPR Snop Vnop
0 -
50 100 1. 0
OC
G G
Vibration (nonoperating)
(3),(4)
Note (1) Temperature and relative humidity range are shown in the figure below. 95 % RH Max. ( 40 OC A Ta) Maximum wet - bulb temperature at 39 OC or less. (Ta > 40 OC) No condensation. (2) 6ms, half sine wave, one time for 3/4X,3/4Y,3/4Z. (3) 10 - 55 - 10 Hz, Sweep rate 2.5 min, 120 min for X,Y,Z. (4) At testing Vibration and Shock, the fixture in holding the Module to be tested have to be hard and rigid enough so that the Module would not be twisted or bent by the fixture.
100
95
Relative Humidity ( %RH)
80 60 40 20
5
Operating Range
Storage Range
0 20 40 60 80
0 -40 -2 0
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1.2 ELECTRICAL ABSOLUTE RATINGS (1) TFT LCD MODULE
ITEM Power Supply Voltage Logic Input Voltage SYMBOL VDD VIN MIN. GND-0.3 GND-0.3 MAX. 6.0 VDD+0.3 UNIT V V
Preliminary
(GND = 0 V) NOTE
(1) (1)
NOTE (1) Within Ta ( 25 3/4 2 OC )
(2) BACK-LIGHT UNIT
ITEM Lamp current Lamp frequency SYMBOL IL FL MIN. 35 MAX. 6.0 60 UNIT. mArms KHz
Ta = 25 3/4 2 OC NOTE (1) (1)
NOTE (1) Permanent damage to the device may occur if maximum values are exceeded. Functional operation should be restricted to the conditions described under Normal Operating Conditions.
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Preliminary
2. OPTICAL CHARACTERISTICS
The following items are measured under stable conditions. The optical characteristics should be measured in a dark room or equivalent state with the methods shown in Note (5). Measuring equipment : TOPCON BM-5A
* Ta = 253/42oC , VDD = 3.3V, fv = 60Hz, fDCLK= 40 MHz, IL = 3.5 mA ITEM Contrast Ratio (5 Points) Response Time at Ta Rising Falling Average Luminance of White (5 Points) Red SYMBOL CONDITION CR TR TF YL,AVE = 0, RX RY Green Color Chromaticity ( CIE ) Blue BY WX White WY L Hor. Viewing Angle Ver. R H L CR( at ceter point) A10 0.266 45 45 10 30 0.296 0.326 Degrees 2.0 (6) 0.085 0.248 0.115 0.278 0.145 0.308 GX GY BX = 0 Normal Viewing Angle 0.531 0.315 0.265 0.507 0.119 0.561 0.345 0.295 0.537 0.149 0.591 0.375 0.325 0.567 0.179 (1), (5) MIN. 100 50 TYP. 20 30 70 MAX. 50 msec 70 cd/m2 (1), (4) (1), (3) UNIT NOTE (1), (2), (5)
13 Points White Variation
aL
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Preliminary
Note 1) Definition of Viewing Angle : Viewing angle range (10A C/Rat center point ) Normal Line = 0 o , = 0 o L R L =90o L H 12 oclock direction H = 90o
x
y
6 oclock y' direction L= 90o
x'
R =90o
Note 2) Definition of Contrast Ratio (CR) : Ratio of gray max (Gmax) ,gray min (Gmin) at 5 points(4, 5, 7, 9, 10) CR(4) + CR(5) + CR(7) + CR(9) + CR(10) CR = 5 POINTS : 4, 5, 7, 9, 10 at FIGURE OF NOTE 6)
Note 3) Definition of Response time : Sum of TR ,TF
Display data
White(TFT OFF)
Black(TFT ON)
White(TFT OFF)
TR Optical Response 100% 90%
TF
10% 0% Time
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Preliminary
Note 4) Definition of Average Luminance of White : measure the luminance of white at 5 points.
Average Luminance of White ( Y L,AVE )
200
400
600 (pixels) VIEW AREA
5
4 3
YL5 + YL4 + YL3 + YL2 + YL1 Y L,AVE = 5
2 1
150 300 450 (lines)
Note 5) After stabilizing and leaving the panel alone at a given temperature for 30 min , the measurement should be executed. Measurement should be executed in a stable, windless,and dark room. 30 min after lighting the backlight. This should be measured in the center of screen. Lamp current : 3.5mA Environment condition : Ta = 25oC 3/42 oC
Photo-detector ( TOPCON BM-5A)
Field = 2
o 40 cm
TFT-LCD module
LCD panel
center of the screen
Optical characteristics measurement setup
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Preliminary
Note 6) Definition of 13 points white variation (aL )
aL =
Maximum luminance of 13 points Minimum luminance of 13 points
(pixels)
10mm 10mm
200
400
600
10mm
13 10 8 5 3
12 9 7 4 2
11
VIEW AREA 150 300 450 (lines) : test point
6
1
10mm
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3. ELECTRICAL CHARACTERISTICS
3.1 TFT LCD MODULE
Preliminary
Ta=25oC 3/42 oC
ITEM Voltage of Power Supply Input Voltage for Logic Signals High Low
SYMBOL VDD Vih Vil fV fH fDCLK IRUSH White
MIN 3.0 2.0 38 -
TYP 3.3 60 37.879 40 210 250 280
MAX 3.6
-
UNIT V
NOTE
V V
Hz kHz MHz A mA mA mA
(1) (1)
0.8 42 1.5 340
Vsync Frequency Hsync Frequency Main Frequency Rush Current Current of Power Supply
(4) (2)(3) *a (2)(3) *b (2)(3) *c
Mosaic V.Stripe
IDD
-
Note (1) Display data pins and timing signal pins should be connected.(GND=0V) (2) fV= 60Hz, fDCLK = 40MHz, VDD =3.3V, DC Current. (3) Power dissipation pattern.
*a) White Pattern
VIEW AREA
*b)Mosaic Pattern
Display Brightest Gray Level
*
Display Darkest Gray Level
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*c) Vertical stripe pattern
Preliminary
RG BR GB BR G B R
B
RG
BRG
BR
GB
R
RGBRGB
(4) Measurement Conditions VDD rising time : 470A
5V M1 2SK1059
VDD ( LCD
R1 47K FUSE C1 1uF
INPUT)
CONTROL SIGNAL
R2 1K M2 2SK1399
(HIGH to LOW)
12V
R3 47K
C2
C3 1uF
10000pF
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3.2 BACKLIGHT UNIT
Preliminary
Ta=25oC 3/42 oC MIN 2.0 35 10,000 TYP 3.5 613 2.14 MAX 5.0 60 1100 (25E) 1300 (0 E) UNIT mArms Vrms KHz W Hour NOTE (1) IL=3.5mA (2) (3), IL=3.5mA (4)
The backlight system is an edge - lighting type with a single CCFT ( Cold Cathode Fluorescent Tube ). The characteristics of a single lamp are shown in the following tables. INVERTER : SIC 310 LAMP : HMBOK22B62E255.5W/AX ITEM Lamp Current Lamp Voltage Frequency
Power Consumption Operating Life Time
SYMB IL VL fL PL Hr VS
Startup Voltage
-
Vrms
(5)
Note) The waveform of the inverter output voltage must be area symmetric and the design of the inverter must have specifications for the modularized lamp. The performance of the backlight, for example life time or brightness, is much influenced by the characteristics of the DC-AC inverter for the lamp. So all the parameters of an inverter should be carefully designed so as not to produce too much leakage current from high-voltage output of the inverter. When you design or order the inverter, please make sure that a poor lighting caused by the mismatch of the backlight and the inverter(miss lighting, flicker, etc.) never occur. When you confirm it, the module should be operated in the same condition as it is installed in your instrument. Note (1) Lamp current is measured with a high frequency current meter as shown below. HOT : (Pink )
1
LCD MODULE
No 3 Pin is VLOW.
COLD : (White )
3
A
INVERTER
(SIC 310 )
Switching Frequency : 35 ~ 60 KHz (2) Lamp frequency may produce interference with horizontal synchronous frequency and this 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) refer to IL VL to calculate. (4) Life time (Hr) of a lamp can be defined as the time in which it continues to operate under the condition Ta = 25E3/42 oC and IL = 5.0 mArms until one of the following event occurs. 1. When the brightness becomes 50% or lower than it' original. s 2. When the Effective ignition length becomes 80% or lower than it' original value. s (Effective ignition length is defined as an area that has less than 70% brightness compared to the brightness in the center point.) (5) The voltage above this value should be applied to the lamp for more than 1 second to startup Otherwise the lamp may not be turned on.
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4. BLOCK DIAGRAM
4.1 TFT LCD MODULE
Preliminary
HCLK(20MHz)
R(5:0) G(5:0) B(5:0) Hsync Vsync DE MCLK
Timing Converter
RGB Data Odd(18bit) RGB Data Even (18bit)
Data Driver
Data Driver
Data Driver
Data Driver
Data Driver
Data Driver
Data Driver
Data Driver
Source Drive ICs block
DC Power supply
Gate Drive ICs block
LCD Drive Circuit
TFT-LCD
4.2 BACKLIGHT UNIT Reflector
1 LAMP 2 3 N.C. COLD(White) HOT (Pink )
Note) The output of the inverter may change according to the material of the reflector.
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5. INPUT TERMINAL PIN ASSIGNMENT
5.1. Input Signal & Power Connector : Hirose DF9B-41P-01V Mating Connector : Hirose DF9-41S-1V(21)
Preliminary
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 33 34 35 36 37 38 39 40 41
Symbol GND DCLK GND HSYNC VSYNC GND GND GND R0 R1 R2 GND R3 R4 R5 GND GND GND G0 G1 G2 GND G3 G4 G5 GND GND GND B0 B1 B2 GND B3 B4 B5 GND DE [DTMG] N.C. VDD VDD N.C.
Function Power Ground Data Clock Power Ground Horizontal Sync Signal Vertical Sync Signal Power Ground Power Ground Power Ground Red Data [ LSB ] Red Data Red Data Power Ground Red Data Red Data Red Data [ MSB ] Power Ground Power Ground Power Ground Green Data [ LSB] Green Data Green Data Power Ground Green Data Green Data Green Data [ MSB ] Power Ground Power Ground Power Ground Blue Data Blue Data Blue Data Power Ground Blue Data Blue Data Blue Data [ MSB ] Power Ground Data Enable [ Display Timing ] No Connection Power Supply [ +3.3V ] Power Supply [ +3.3V ] No Connection
Polarity Negative Negative Positive Positive Positive Positive Positive Positive Positive Positive Positive Positive Positive Positive Positive Positive Positive Positive Positive Positive Positive -
Remark (1) (2)
(2)
(2)
*
(2)
m
(2)
(2)
Open Open
Remark : (1) Display Data is sampled at the negative edge of Data Clock. (2) Data level 0 means no color ( Black ).
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Preliminary
5.2 BACK LIGHT UNIT Connector : JST BHR-03VS-1 Mating Connector : H-JST5-6 Color
PINK WHITE
Pin NO.
1 2 3
Symbol
HOT N.C. COLD
Function
High Voltage No Connection Ground
5.3 PIXEL FORMAT
000 001
RGB
798
RGB
799
RGB
Line 1
RGB
LT121S1 - 105 Panel
Line 600
RGB
RGB
RGB
RGB
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5.4 Input Signal,Basic Display Colors and Gray Scale of Each Colors
DA TA S IGNA L CO LOR DISP LAY RE D GRE E N
Preliminary
G RA Y B LUE S CA LE LE V E L R0 R1 R2 R3~R60 R61 R62 R63 G0 G1 G2 G3~G 60 G 61 G 62 G 63 B0 B1 B2 B 3~B 60 B 61 B 62 B 63
R0 R1 R2 R3 R4 R5 G0 G 1 G 2 G3 G 4 G 5 B 0 B 1 B 2 B 3 B 4 B 5 B LACK B LUE GRE E N B A S IC CO LOR CY AN RE D MA G E NTA Y E LLOW W HITE B LACK DA RK G RA Y S CA LE OF RE D LIGHT RE D B LACK DA RK G RA Y S CA LE OF GRE E N LIGHT GRE E N B LACK DA RK G RA Y S CA LE OF B LUE LIGHT B LUE 0 0 0 0 1 1 1 1 0 1 0 : : 1 0 1 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 0 0 0 0 1 1 1 1 0 0 1 : : 0 1 1 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 0 0 0 0 1 1 1 1 0 0 0 : : 1 1 1 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 0 0 0 0 1 1 1 1 0 0 0 : : 1 1 1 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 0 0 0 0 1 1 1 1 0 0 0 : : 1 1 1 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 0 0 0 0 1 1 1 1 0 0 0 : : 1 1 1 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 0 0 1 1 0 0 1 1 0 0 0 : : 0 0 0 0 1 0 : : 1 0 1 0 0 0 : : 0 0 0 0 0 1 1 0 0 1 1 0 0 0 : : 0 0 0 0 0 1 : : 0 1 1 0 0 0 : : 0 0 0 0 0 1 1 0 0 1 1 0 0 0 : : 0 0 0 0 0 0 : : 1 1 1 0 0 0 : : 0 0 0 0 0 1 1 0 0 1 1 0 0 0 : : 0 0 0 0 0 0 : : 1 1 1 0 0 0 : : 0 0 0 0 0 1 1 0 0 1 1 0 0 0 : : 0 0 0 0 0 0 : : 1 1 1 0 0 0 : : 0 0 0 0 0 1 1 0 0 1 1 0 0 0 : : 0 0 0 0 0 0 : : 1 1 1 0 0 0 : : 0 0 0 0 1 0 1 0 1 0 1 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 0 1 0 : : 1 0 1 0 1 0 1 0 1 0 1 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 0 0 1 : : 0 1 1 0 1 0 1 0 1 0 1 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 0 0 0 : : 1 1 1 0 1 0 1 0 1 0 1 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 0 0 0 : : 1 1 1 0 1 0 1 0 1 0 1 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 0 0 0 : : 1 1 1 0 1 0 1 0 1 0 1 0 0 0 : : 0 0 0 0 0 0 : : 0 0 0 0 0 0 : : 1 1 1
Note (1) Definition of Gray : Rn : Red Gray, Gn : Green Gray, Bn : Blue Gray (n = Gray level) (2) Input Signal : 0 = Low level voltage, 1 = High level voltage Doc.No. LT121S1-105 Rev.No 04 - 004 - G - 980113 Page 17 /30
Preliminary
6. INTERFACE TIMING
6.1 Timing Parameters
Signal
Item
Frequency
Symbol
1 / TC T CH T CL T DS T DH T ES TV
MIN
38 5 5 5 5 5
TYP
40 -
MAX
42 -
Unit
MHz nsec nsec nsec nsec nsec
Note
Clock
High Time Low Time Setup Time
Data Hold Time Data Enable Frame Frequency Setup Time
(1 )
Cycle
620
628
664
lines
Vertical Active Display Term One Line Scanning Time Horizontal Active
Display Period
TVD
-
600
-
lines
Cycle
TH
1024
1056
1056
clocks
(2 )
Display Period Display Term
T HD
-
800
-
clocks
Note (1) When the VGA controller sets DE only mode, Hsync and Vsync should be set low logic level or ground. (2) The duration of DE [DTMG] signal must be longer than 1 clock period at every horizontal sync. period
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Preliminary
6.2 Timing diagrams of interface signal
TV
TVD DE
TH
DCLK TC THD DE
DATA SIGNALS
Valid display data ( 800 pixel)
TC
- Signal Transition Timing
2.0 V
TCH
50%
TCL
50% 0.8 V
DCLK
TDS DISPLAY DATA TES DE
2.0 V
TDH
2.0 V 0.8 V
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6.3 Power ON/OFF Sequence
Preliminary
: To prevent a latch-up or DC operation of the LCD module, the power on/off sequence should be as the diagram below.
3.0V
3.0V 0.3V 0.3V
Power Supply VDD
0.3V 0V
0AT1A10 msec 0AT2A50 msec 0AT3A50 msec 1secA T4 Interface Signal
T1 T2
VALID
T3 T4
0V 0.8V Power On
0.8V Power Off
Power ON/OFF Sequence
NOTE. (1) The supply voltage of the external system for the module input should be the same as the definition of VDD. (2) Apply the lamp voltage within the LCD operation range. When the backlight turns on before the LCD operation or the LCD turns off before the backlight turns off, the display may momentarily become white. (3) In case of VDD = off level, please keep the level of input signals on the low or keep a high impedance. (4) T4 should be measured after the module has been fully discharged between power off and on period.
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7. Outline Dimension
Preliminary
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8. GENERAL PRECAUTIONS
1. Handling
Preliminary
(a) When the module is assembled, It should be attached to the system firmly using every mounting holes. Be careful not to twist and bend the modules. (b) Refrain from strong mechanical shock and/or any force to the module. In addition to damage, this may improper operation or damage to the module and CCFL backlight. (c) Note that polarizers are very fragile and could be easily damaged. Do not press or scratch the surface harder than a HB pencil lead. (d) Wipe off water droplets or oil immediately. If you the droplets for a long time, Staining and discoloration may occur. (e) If the surface of the polarizer is dirty, clean it using some absorbent cotton or soft cloth. (f) The desirable cleaners are water, IPA(Iso Prophyl Alcohol) or Hexane. Do not use Keton type materials(ex. Acetone), Ethyl alcohol, Toluene, Ethyl acid or Methyl chloride. It might permanently damage the polarizer due to chemical reaction. (g) 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 throughly with soap. (h) Protect the module from static , it may cause damage to the C-MOS Gate Array IC. (i) Use fingerstalls with soft gloves in order to keep display clean during the incoming inspection and assembly process. (j) Do not disassemble the module. (k) Do not pull or fold the Lamp wire. (l) Do not adjust the variable resistor which is located on the back side.
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2. STORAGE
Preliminary
(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 is from 0 to 35 E and Relative humidity of less than 70%. (b) Do not store the TFT-LCD module in direct sunlight.
3. OPERATION (a) Do not connect,disconnect the module in the " Power On" condition. (b) Power supply should always be turned on/off by following item 6.3 " Power on/off sequence " 4. 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. ( the supply voltage variation, input voltage variation, variation in part contents and environmental temperature, so on) Otherwise the module may be damaged. (d) If the module Displays the same pattern continuously for a long period of time,it can be the situation when the image " sticks"to the screen.
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