LTM190EX- L31. Note : This is Product Information is subject to change after 3 months of issuing date. Product Planning Group 2, LCD Business

Transcription

1 ISSUED DATE 2/Feb/26 SAMSUNG TFTLCD LTM9EXL3 L3 Note This is Product Information is subject to change after 3 months of issuing date. Product Planning Group 2, LCD Business Samsung Electronics Co., LTD. LTM9EX L3 /32

2 Contents Product Information General Description (4). Absolute Maximum Ratings (5) 2. Optical Characteristics () 3. Electrical Characteristics () 3. TFT LCD Module 3.2 Back Light Unit 4. Block Diagram (6) 4. TFT LCD Module 4.2 Back Light Unit 5. Input Terminal Pin Assignment (7) 5. Input Signal & Power 5.2 LVDS Interface 5.3 Back Light Unit 5.4 Input Signals, Basic Display Colors and Gray Scale of Each Color 6. Interface Timing (24) 6. Timing Parameters (DE only mode) 6.2 Timing Diagrams of interface Signal (DE only mode) 6.3 Power ON/OFF Sequence 6.4 LVDS Input Characteristics 6.5 VDD Power Dip Condition 7. Outline Dimension (28) 8. General Precaution (3) 8. Handling 8.2 Storage 8.3 Operation 8.4 Others LTM9EX L3 2/32

3 General Description Product Information Description LTM9EXL3 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 9. is 28 x 24 and this model can display up to 6.7 millions colors. Features RoHS compliance (Pbfree) High contrast ratio, high aperture ratio, fast response time TN(Twisted Nematic) mode 2 dual CCFTs(Cold Cathode Fluorescent Tube) DE(Data Enable) mode LVDS (Low Voltage Differential Signaling) interface (2pixel/clock) COMPACT SIZE DESIGN TCO 3 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 in advance. General Information Items Specification Unit Note Pixel Pitch.294(H) x.294(w) mm Active Display Area (H) x 3.56(V) mm Surface Treatment Haze 25%, Hardcoating (3H) Display Colors 6.7M colors Number of Pixels 28 x 24 pixel Pixel Arrangement RGB vertical stripe Display Mode Normally White Power Consumption Watt(Typ.) Luminance of White 3(Typ.) cd/m2 LTM9EX L3 3/32

4 Mechanical Information Item Min. Typ. Max. Unit Note Module size Horizontal (H) Vertical (V) mm mm w/o inverter ass y Depth (D) 7. mm Weight 2,25 g g LCD module only w/ Inverter assembly Note () Mechanical tolerance is ±.5mm unless there is a special comment.. 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 DD GND V () Data Signal V sig 5 V Storage temperature T STG 25 6 (2) Glass surface temperature (Operation) Center T OPR 5 (2),(5) Shock ( non operating ) S nop 5 G (3) Vibration ( non operating ) V nop.5 G (4) Note () Ta= 25 ±2 C LTM9EX L3 4/32

5 (2) Temperature and relative humidity range are shown in the figure below. a. 9 % RH Max. (Ta 39 C) b. Maximum wetbulb temperature at 39 C or less. (Ta 39 C) c. No condensation (3) ms, sine wave, one time for ±X, ±Y, ±Z axis (4) 3 Hz, Sweep rate min, 3min for X,Y,Z axis (39,9) (5,5.4) (6,27.7) (25,5) Fig. Temperature and Relative humidity range LTM9EX L3 5/32

6 2. Optical Characteristics Product Information The optical characteristics should be measured in a dark room or equivalent. Measuring equipment TOPCON RD8S,SPECTRORADIOMETER SR3 (Ta = 25 ±2 C, VDD=5V, fv= 6Hz, fdclk=54mhz, IL = 7.5mArms) Item Symbol Condition Min. Typ. Max. Unit Note Contrast Ratio (Center of screen) C/R TBD (3) SR3 Response Time Rising Falling Tr Tf TBD TBD msec (5) RD8S Luminance of White (Center of screen) Y L 25 3 cd/m2 (6) SR3 Red Rx Ry Color Chromaticity (CIE 93) Green Blue Gx Gy Bx By Normal θ L,R = θ U,D = Viewing Angle White Wx Wy (7),(8) Red Ru' Rv' SR3 Color Chromaticity (CIE 976) Green Blue Gu' Gv' Bu' Bv' White Wu' Wv' C.G.L White u'v'.8.2 (9) * C.G.L Color Grayscale Linearity LTM9EX L3 6/32

7 Color Gamut Color Temperature Viewing Angle Item Hor. Ver. Brightness Uniformity (9 Points) Symbol θ L B uni Condition Min. Typ. 72 6,5 8 Max. 25 Unit % K % Note θ R 8 (8) CR Degrees θ U 8 SR3 θ D 8 (4) SR3 Note () Test Equipment Setup The measurement should be executed in a stable, windless and dark room between 3min 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 7.5mA Environment condition Ta = 25 ±2 C Photo detector SR3 RD8S Field Photo detector Field SR3 5cm RD8S 5cm TFT LCD Module LCD Panel The center of the screen LTM9EX L3 7/32

8 Note (2) Definition of test point Active Area Test Point Note (3) Definition of Contrast Ratio (C/R) Ratio of gray max (Gmax) & gray min (Gmin) at the center point of the panel CR G G max min Gmax Luminance with all pixels white Gmin Luminance with all pixels black Note (4) Definition of 9 points brightness uniformity ( Bmax Bmin) Buni B max Bmax Maximum brightness Bmin Minimum brightness Note (5) Definition of Response time Sum of Tr, Tf Display Data White(TFT off) Black(TFT on) White(TFT off) Optical Instruments Response % 9% % % LTM9EX L3 8/32

9 Note (6) Definition of Luminance of White Luminance of white at center point Product Information Note (7) Definition of Color Chromaticity (CIE 93, CIE976) Color coordinate of Red, Green, Blue & White at center point Note (8) Definition of Viewing Angle Viewing angle range (CR, 5) LTM9EX L3 9/32

10 Note (9) Color Grayscale Linearity a. Test image % full white pattern with a test pattern as below Product Information b. Test pattern Squares, 4mm by 4mm in size, filled with 255, 225, 95, 65, 35 and 5 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 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' A u' B) 2 + (v' A v' B) 2 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. LTM9EX L3 /32

11 3. Electrical Characteristics 3. TFT LCD Module The connector for display data & timing signal should be connected. Item Symbol Min. Typ. Product Information Max. Unit Ta = 25 C Note Voltage of Power Supply V DD V () Differential Input Voltage for LVDS Receiver Threshold High Low + mv mv (2) LVDS skew t SKEW ps (3) LVDS Input Characteri stics Differential input voltage Input voltage range (singleended) V ID V IN mv V (4) (4) Common mode voltage V CM + V ID / V ID /2 V (4) Current of Power Supply Input current (a) Black I IN ± μa (5) 7 ma (b) White 55 ma (6),(7) I DD (c) Dot ma Vsync Frequency f V Hz Hsync Frequency f H khz Main Frequency f DCLK MHz Rush Current I RUSH 3. A (8) Note () The ripple voltage should be controlled under % of V DD. LTM9EX L3 /32

12 (2) Differential receiver voltage definitions and propagation delay and transition time test circuit a. All input pulses have frequency = MHz, t R or t F =ns b. C L includes all probe and fixture capacitance 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 DIFF = V V DIFF = V Differential LVDS Data RX +/ Differential t SKEW where tskew skew between LVDS clock & LVDS data, T period time of LVDS clock cf) (/+) of 38psec means LVDS data goes before or after LVDS clock. (4) Definition of V ID and V CM using singleend signals LTM9EX L3 2/32

13 (5) Measurement Conditions Maximum + VIN=2.4V, VDD=3.6V, VIN=V, VDD=3.6V (6) fv=6hz, fdclk = 54MHz, VDD = 5.V, DC Current. (7) Power dissipation check pattern (LCD Module only) a) Black Pattern b) White Pattern c) Dot Pattern Product Information (8) Measurement Conditions. % 9% V DD % GND T RUSH =47μs Rush Current I RUSH can be measured when T RUSH. is 47μs. LTM9EX L3 3/32

14 3.2 Back Light Unit The back light unit is an edge lighting type with 2 dual CCFTs ( Cold Cathode Fluorescent Tube ) The characteristics of two dual lamps are shown in the following tables. Ta=25 ±2 C Item Symbol Min. Typ. Max. Unit Note Lamp Current I L marms () Lamp Voltage V L 65 Vrms Lamp Frequency f L 4 6 khz (2) Operating Life Time Hr 5, Hour (3) Inverter waveform Asymmetry rate Distortion rate Wasy Wdis % (4) Startup Voltage Vs,65 25,45 Vrms (5) Note () 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. HOT(PINK) COLD(WHITE) HOT(BLUE) I A LCD Module COLD(BLACK) HOT(PINK) COLD(WHITE) HOT(BLUE) I 2 I 3 A A INVERTER (SI7) COLD(BLACK) I 4 A Fig. Measurement point of Lamp Current LTM9EX L3 4/32

15 (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 5% or less than its original value at the condition of Ta = 25±2 C and I L = 7.5mArms (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 %. c. The distortion rate of the waveform should be 2 with ±% tolerance. Inverter output waveform had better be more similar to ideal sine wave. I p I p Fig. Wave form of the inverter Asymmetry rate Ip I p Irms Distortion rate Ip Irms or I p Irms (5) If an inverter has shutdown function, it should keep its output for over second even if the lamp connector is open. Otherwise the lamps may not be turned on. LTM9EX L3 5/32

16 4. BLOCK DIAGRAM Product Information 4. TFT LCD Module RSDS Control signal Source Driver ICs LVDS pair # LVDS pair #2 CN (3pin) LVDS (Rx) LVDS(Tx) RSDS(Tx) Timing Controller S Control signal Column Driver Circuit TFTLCD (28 x RGB x 24 pixels) S28 +5.V V DD Power Circuit 4.2 Back Light Unit LAMP(CCEL) 2 HOT(PINK) COLD(WHITE) LAMP(CCEL) 3 4 HOT(BLUE) COLD(BLACK) LAMP(CCEL) 2 LAMP(CCEL) 3 4 HOT(PINK) COLD(WHITE) HOT(BLUE) COLD(BLACK) LTM9EX L3 6/32

17 5. Input Terminal Pin Assignment Product Information 5.. Input Signal & Power ( Connector UJU ISL3OC23 or Compatible ) PIN NO SYMBOL V DD FUNCTION 2 V DD Power Supply +5V V DD NC *CTL *CE GND RXE3+ RXE3 RXEC+ RXEC RXE2+ RXE2 GND RXE+ RXE GND RXE+ RXE RXO3+ RXO3 RXOC+ RXOC GND RXO2+ RXO2 RXO+ RXO RXO+ RXO No Connection For LCD internal use only. Do not Connect. For LCD internal use only. Do not Connect. Power Ground Positive Transmission Data of Pixel 3 (EVEN data) Negative Transmission Data of Pixel 3 (EVEN data) Positive Sampling Clock (EVEN data) Negative Sampling Clock (EVEN data) Positive Transmission Data of Pixel 2 (EVEN data) Negative Transmission Data of Pixel 2 (EVEN data) Power Ground Positive Transmission Data of Pixel (EVEN data) Negative Transmission Data of Pixel (EVEN data) Power Ground Positive Transmission Data of Pixel (EVEN data) Negative Transmission Data of Pixel (EVEN data) Positive Transmission Data of Pixel 3 (ODD data) Negative Transmission Data of Pixel 3 (ODD data) Positive Sampling Clock (ODD data) Negative Sampling Clock (ODD data) Power Ground Positive Transmission Data of Pixel 2 (ODD data) Negative Transmission Data of Pixel 2 (ODD data) Positive Transmission Data of Pixel (ODD data) Negative Transmission Data of Pixel (ODD data) Positive Transmission Data of Pixel (ODD data) Negative Transmission Data of Pixel (ODD data) * If the system already uses the 5, 6pins, it should keep under GND level The voltage applied to those pins should not exceed 2mV. LTM9EX L3 7/32

18 Note) Pin number starts from Right side PCB Pin No. Pin No. 3 # #3 ( UJU ISL3OC23 or Compatible ) # #3 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. LTM9EX L3 8/32

19 5.2 LVDS Interface 5.2. Odd Pixel Data (st pixel data) N o Device Input Pin Symbol TXIN TXIN TXIN2 TXIN3 TXIN4 TXIN5 TXIN6 TXIN7 TXIN8 TXIN9 TXIN TXIN TXIN2 TXIN5 TXIN6 TXIN7 TXIN8 TXIN9 TXIN22 TXIN27 st LVDS Transmitter ( DS9C383, DS9C385 ) Signal Interface Symbol RO RO RO2 RO3 RO4 RO7 RO5 GO GO GO2 GO6 GO7 GO3 BO BO6 BO7 BO BO2 BO5 RO6 Device Input Signal Function Red Odd Pixel Data (LSB) Red Odd Pixel Data Red Odd Pixel Data Red Odd Pixel Data Red Odd Pixel Data Red Odd Pixel Data (MSB) Red Odd Pixel Data Green Odd Pixel Data (LSB) Green Odd Pixel Data Green Odd Pixel Data Green Odd Pixel Data Green Odd Pixel Data (MSB) Green Odd Pixel Data Blue Odd Pixel Data (LSB) Blue Odd Pixel Data Blue Odd Pixel Data (MSB) Blue Odd Pixel Data Blue Odd Pixel Data Blue Odd Pixel Data Red Odd Pixel Data Output Signal TXOUT TXOUT+ TXOUT3 TXOUT3+ TXOUT TXOUT+ TXOUT TXOUT+ TXOUT3 TXOUT3+ TXOUT3 TXOUT3+ TXOUT TXOUT+ TXOUT3 TXOUT3+ Product Information To LTM9EX Interface ( CN ) Termin al No. No. 2 No. No. No. No. 2 No. 3 No. 4 No. No. 2 TXIN3 GO4 Green Odd Pixel Data TXOUT No. 3 RXO 4 TXIN4 GO5 Green Odd Pixel Data TXOUT+ No. 4 RXO+ No. No. No. 3 No TXIN2 BO3 Blue Odd Pixel Data TXOUT2 No. 5 RXO2 23 TXIN2 BO4 Blue Odd Pixel Data TXOUT2+ No. 6 RXO2+ No. No. Symbol RXO RXO+ RXO3 RXO3+ RXO RXO+ RXO RXO+ RXO3 RXO3+ RXO3 RXO3+ RXO RXO+ RXO3 RXO3+ LTM9EX L3 9/32

20 5.2.2 Even Pixel Data (2nd pixel data) 2nd LVDS Transmitter ( DS9C383, DS9C385 ) Signal Interface Device Input Pin No Symbol Symbol Device Input Signal Function Output Signal To LTM9EX Interface ( CN ) Terminal Symbol 5 TXIN RE Red Even Pixel Data (LSB) TXIN TXIN2 TXIN3 RE RE2 RE3 Red Even Pixel Data Red Even Pixel Data Red Even Pixel Data TXOUT TXOUT+ No. 2 No. 3 RXE RXE+ 56 TXIN4 RE4 Red Even Pixel Data 2 TXIN5 RE7 Red Even Pixel Data (MSB) TXOUT3 TXOUT3+ No. 22 No. 23 RXE3 RXE TXIN6 TXIN7 RE5 GE Red Even Pixel Data Green Even Pixel Data (LSB) TXOUT TXOUT+ No. 2 No. 3 RXE RXE+ 6 7 TXIN8 TXIN9 GE GE2 Green Even Pixel Data Green Even Pixel Data TXOUT TXOUT+ No. 5 No. 6 RXE RXE+ 8 TXIN TXIN GE6 GE7 Green Even Pixel Data Green Even Pixel Data (MSB) TXOUT3 TXOUT3+ No. 22 No. 23 RXE3 RXE3+ TXIN2 GE3 Green Even Pixel Data 2 TXIN3 GE4 Green Even Pixel Data TXOUT No. 5 RXE 4 TXIN4 GE5 Green Even Pixel Data TXOUT+ No. 6 RXE+ 5 TXIN5 BE Blue Even Pixel Data (LSB) 6 8 TXIN6 TXIN7 BE6 BE7 Blue Even Pixel Data Blue Even Pixel Data (MSB) TXOUT3 TXOUT3+ No. 22 No. 23 RXE3 RXE3+ 9 TXIN8 BE Blue Even Pixel Data TXOUT TXOUT+ No. 5 No. 6 RXE RXE+ 2 TXIN9 BE2 Blue Even Pixel Data 22 TXIN2 BE3 Blue Even Pixel Data TXOUT2 No. 8 RXE2 23 TXIN2 BE4 Blue Even Pixel Data TXOUT2+ No. 9 RXE2+ 24 TXIN22 BE5 Blue Even Pixel Data 5 TXIN27 RE6 Red Even Pixel Data TXOUT3 TXOUT3+ No. 22 No. 23 RXE3 RXE3+ LTM9EX L3 2/32

21 5.2.3 Timing Diagrams of LVDS For Transmitting LVDS Receiver Integrated TCON LTM9EX L3 2/32

22 5.3 Back Light Unit Pin No. Input Color Function Hot Pink High Voltage Upper 2 3 Cold Hot2 White Blue Ground High Voltage 4 Cold2 Black Ground Hot Pink High Voltage Lower 2 3 Cold Hot2 White Blue Ground High Voltage 4 Cold2 Black Ground Connect or Part No. YEONHO 35HS2L or equivalent LTM9EX L3 22/32

23 23/32 LTM9EX L3 Product Information Product Information 5.4 Input Signals, Basic Display Colors and Gray Scale of Each Color B255 BLUE B254 B253 B3~ B252 B2 B DARK LIGHT B BLACK GRAY SCALE OF BLUE G255 GREEN G254 G253 G3~ G252 G2 G DARK LIGHT G BLACK GRAY SCALE OF GREE N R255 RED R254 R253 R3~ R252 R2 R DARK LIGHT R BLACK GRAY SCALE OF RED WHITE YELLOW MAGENT A RED CYAN GREEN BLUE BLACK BASIC COLO R B7 B6 B5 B4 B3 B2 B B G 7 G6 G 5 G 4 G3 G 2 G G R7 R6 R5 R4 R3 R2 R R BLUE GREEN RED GRAY SCALE LEVEL DATA SIGNAL DISPLAY (8bit) COLO R Note () Definition of Gray Rn Red Gray, Gn Green Gray, Bn Blue Gray (n = Gray level) Input Signal = Low level voltage, = High level voltage

24 6. Interface Timing 6. Timing Parameters ( DE only mode ) Product Information SIGNAL ITEM SYMBOL MIN. TYP. MAX. Unit NOTE Clock /T C MHz Hsync Frequency F H KHz Vsync F V Hz Vertical Display Term Active Display Period Vertical Total T VD T VB lines lines Horizontal Display Term Active Display Period Horizontal Total T HD T H clocks clocks 2pi xel/clock 2pi xel/clock Note () 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 (3) Internal Vcc = 3.3V LTM9EX L3 24/32

25 6.2 Timing diagrams of interface signal ( DE only mode ) TV TVD TVB DE TH THD DE DCLK TC DATA SIGNALS TC TCH TCL DCLK.5 V CC TDS TDH DISPLAY DATA.5 V CC TES DE.5 V CC LTM9EX L3 25/32

26 6.3 Power ON/OFF Sequence To prevent a latchup or DC operation of the LCD Module, the power on/off sequence should be as the diagram below. 3μs T msec T2 5msec T3 5msec sec T4 BackLight (Recommended) 5msec T5 msec T6 T V DD rising time from % to 9% T2 The time from V DD to valid data at power ON. T3 The time from valid data off to V DD off at power Off. T4 V DD off 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 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 DD = off level, 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. LTM9EX L3 26/32

27 6.4 VDD Power Dip Condition V DD T d 9% 8% V CC GND 4.5V V DD 5.5V If V DD (typ.) x 8% V CC V DD (typ) x 9% Then, <Td 2msec Note () 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 8% Vcc typ VDD x 9%, then T d should be less than 2ms. LTM9EX L3 27/32

28 7. Outline Dimension [ Refer to the next page ] Product Information LTM9EX L3 28/32

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30 8. General Precautions Product Information 8. 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 mechanical shock 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 fingerstalls 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. LTM9EX L3 3/32

31 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 to 35 and relative humidity of less than 7%. (b) Do not store the TFTLCD 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. Grounding 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. Normal condition is defined as below; Temperature 2±5 Humidity 65±2% 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. LTM9EX L3 3/32

32 8.5 Others (a) Ultraviolet 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. LTM9EX L3 32/32