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doc . no pie01_LTM190E4-L03 page /31 note : this product information is subject to change after 3 months of issuing date. prepared by : lcd business tec hnical customer service team samsung electronics co . , ltd. product information issue date : 2005-06-17 model : LTM190E4-L03
doc . no pie01_LTM190E4-L03 page /31 contents general descripti on -------------------------- (3) 1. absolute maximum rat ings -------------------------- (4) 1.1 absolute ratings of environment 1.2 electrical absolute ratings 2. optical characteristics -------------------------- (6) 3. electrical characteristics -------------------------- (11) 3.1 tft lcd module 3.2 back-light unit 4. block diagram -------------------------- (15) 4.1 tft lcd module 4.2 back-light unit 5. input terminal pin assignment -------------------------- (16) 5.1 input signal & power 5.2 lvds interface (1) 5.3 lvds interface (2) 5.4 back-light unit 5.5 input signals, basic display colors and gray scale of each color 6. interface timing -------------------------- (23) 6.1 timing parameters (de only mode) 6.2 timing diagrams of interface signal (de only mode) 6.3 power on/off sequence 6.4 v dd power dip condition 6.5 lvds input characteristics 7. outline dimension -------------------------- (28) 8. general precaution -------------------------- (30) 8.1 handling 8.2 storage 8.3 operation 8.4 others
doc . no pie01_LTM190E4-L03 page /31 general description * description LTM190E4-L03 is a color active matrix tft (thin film transistor) liquid crystal display (lcd) that uses amorphous silicon tfts as switching devices. this model is composed of a tft lcd panel, a driver circuit and a back-light system. the resolution of a 19.0" contains 1280 x 1024 pixels and can display up to 16.7 millions colors with wide viewing angles of 89 in all directions. (vertical viewing angle : 178, horizontal viewing angle : 178) * features - high contrast ratio, high aperture structure - pva(patterned vertical alignment) mode - wide viewing angle - high speed response - sxga (1280 x 1024 pixels) resolution - low power consumption - 2 dual ccfts (cold cathode fluorescent tube) - de (data enable) mode - lvds (low voltage differential signaling) interface (2pixel/clock) - compact size design - rohs compliant * 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 display area 376.32(h) x 301.056(v) mm driver element a-si tft active matrix display colors 16.7m colors number of pixels 1280 x 1024 pixel pixel arrangement rgb vertical stripe pixel pitch 0.294(h) x 0.294(w) mm display mode normally black surface treatment haze 44% , hard-coating (3h)
doc . no pie01_LTM190E4-L03 page /31 * mechanical information item min. typ. max. note module size horizontal(h) - 396.0 - mm vertical(v) - 324.0 - mm depth(d) - - 20.5 mm weight - - 2,700 g 1. absolute maximum ratings 1.1 absolute ratings of environment item symbol min. max. unit note storage temperature t stg -20 65 ? (1) operating temperature (glass surface temperature) t opr 050 ? (1) shock ( non - operating ) snop - 50 g (2),(4) vibration ( non - operating ) vnop - 1.5 g (3),(4) note (1) temperature and relative humidity range are shown in the figure below. 90 % rh max. ( 40 c ta ) maximum wet-bulb temperature at 39 c or less. (ta > 40 c) no condensation. (2) 11ms, sine wave, one time for x, y, z axis (3) 10-300 hz, sweep rate 10min, 30min for x,y,z axis (4) at vibration and shock test, the fixture which holds the module to be tested has to be hard and rigid enough so that the module would not be twisted or bent by the fixture. 0 20 40 60 80 100 -40 -20 0 20 40 60 80 5 90 operating range storage range relative humidity ( %rh) temperature ( o c) (40 ? ,90%) (50 ? , 50.4%) (65 ? , 27.7%) (-20 ? ,5%)
doc . no pie01_LTM190E4-L03 page /31 1.2 electrical absolute ratings (1) tft lcd module (vss = gnd = 0 v) item symbol min. max. unit note power supply voltage v dd vss-0.5 6.5 v (1) note (1) within ta ( 25 2 c) (2) back-light unit ( ta = 25 2c) item symbol min. max. unit. note lamp current i l 3.0 7.0 marms (1),(2) lamp frequency f l 40 80 khz (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. (2) specified values are for a single lamp. (refer to the note (1) in the page 13 for further information.)
doc . no pie01_LTM190E4-L03 page /31 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 (1). measuring equipment : topcon bm-5a, bm-7, photo research pr650 eldim ez-contrast (inverter freq. : 50khz) * ta = 25 2c, v dd =5v, fv= 60hz, f dclk =54mhz, i l =6.5ma rms item symbol condition min. typ. max. unit note contrast ratio (center of screen) c/r normal =0 =0 viewing angle - 1000 - (3) bm-5a response time on/off t r +t f -13- msec (5) bm-7 gtog t g - g,avg -8- t g - g,long -12- luminance of white (center of screen) y l - 300 - cd/m2 (6) bm-5a color chromaticity (cie 1931) red rx - 0.640 - (7) pr650 ry 0.330 green gx 0.300 gy 0.600 blue bx 0.150 by 0.060 white wx 0.313 wy 0.329 color chromaticity (cie 1976) red ru' - 0.451 - rv' 0.523 green gu' 0.125 gv' 0.563 blue bu' 0.175 bv' 0.158 white wu' 0.198 wv' 0.468 color grayscale linearity white ? u'v' - - 0.02 (9) pr650 viewing angle hor. l cr 10 -89- degrees (8) bm-5a r - 89 - ver. h - 89 - l - 89 - hor. l cr 100 -75- r - 75 - ver. h - 65 - l - 65 - brightness uniformity (9 points) buni - - 25 % (4) bm-5a
doc . no pie01_LTM190E4-L03 page /31 note (1) test equipment setup the measurement should be executed in a stable, windless and dark room between 30min and 40min 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 : 6.5ma (refer to the note(1) in the page 13 for more information.) environment condition : ta = 25 2 c photodetector photodetector field bm-5a 2 bm-7 2 pr650 1 lcd panel tft - lcd module the center of the screen bm-5a : 40 y bm-7 : 50 y pr650 : 50 y field optical measuring equipment setup note (2) definition of test point : test point active area 7 4 1 2 5 8 9 6 3 102 512 922 128 640 1152
doc . no pie01_LTM190E4-L03 page /31 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 buni bb b =? ? 100 (max min) max bmax : maximum brightness bmin : minimum brightness note (5) definition of response time y on/off response time : sum of tr, tf display data white(tft on) black(tft off) black(tft off) optical response 100% 90% 10% 0% t r t f time t gray to gray response time -measuringgray:31 a 63, 63 a 95, 95 a 127, 127 a 159, 159 a 191, 191 a 223 223 a 255 grays and vice versa -t g - g, avg : average response time of ones between above grays -t g - g, long : the longest response time of ones between above grays
doc . no pie01_LTM190E4-L03 page /31 note (6) definition of luminance of white : luminance of white at center point note (7) definition of color chromaticity (cie 1931, cie1976) color coordinate of red, green, blue & white at center point note (8) definition of viewing angle : viewing angle range (cr ? 10, cr ? 100) 6 o?clock direction normal line l r h l 12 o?clock direction r =90 o l =90 o = 0 o , x x? y? y = 0 o h = 90 o l = 90 o
doc . no pie01_LTM190E4-L03 page /31 note (9) color grayscale linearity y test image : 100% full white pattern with a test pattern as below t test pattern : squares, 40mm by 40mm in size, filled with 255, 225, 195, 165, 135 and 105 grays steps should be arranged at the center of the screen. 40mm 40mm 40mm 40mm ? test method . 1st 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. . then, repeat the same procedure for gray steps 195, 165- 135 and 105. test evaluation where a, b : 2 gray levels found to have the largest color differences between them i.e. get the largest u' and v' of each 6 pairs of u' and v' and calculate the u'v'.
doc . no pie01_LTM190E4-L03 page /31 3. electrical characteristics 3.1 tft lcd module ta = 25 c item symbol min. typ. max. unit note voltage of power supply v dd 4.5 5.0 5.5 v (1) interface type lvds ds90c383/385/387 ds90c386 pair current of power supply (a) black i dd - 1,100 - ma (2),(3) (b) white - 1,500 - ma (c) 2 line stripe - 1,500 1,750 ma vsync frequency f v 59 60 76 hz hsync frequency f h 60.9 64.0 81.1 khz main frequency f dclk 40.9 54.0 68.4 mhz rush current i rush --4.0 a (4) note (1) the connector for display data & timing signal should be connected.(vss=0v) (2) f v =75hz, f dclk =67.5mhz, v dd = 5.0v, dc current. (3) power dissipation check pattern(lcd module only) a) black pattern b) white pattern *c) 2line vertical stripe pattern 3(#3(# 3(#3(# 3(#3(# 3(#3(# 3(#3( 3(#3( 3(#3(# 3(#3(# 3(#3(# 3(#3(# 3(#3(# 3(#3(# (#3(# (#3(# # 3(# 3(# 3(# 3(# 3( 3( c) 2line vertical stripe pattern
doc . no pie01_LTM190E4-L03 page /31 (4) measurement conditions 5v 12v v dd ( lcd input) control signal (high to low) m2 2sk1399 m1 2sk1059 r2 1k c2 10000pf c3 1uf r3 47k r1 47k fuse c1 1uf control signal : high(+5v) a low(ground) all signal lines to panel, except for power 5v : ground the rising time of supplied voltage is controlled to 470us by r3 and c2 value. 0.9 v dd 0.1 v dd rising time gnd 5v
doc . no pie01_LTM190E4-L03 page /31 3.2 back-light unit the back-light system 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 2c item symbol min. typ. max. unit note lamp current i l 3.0 6.5 7.0 marms (1) lamp voltage v l - 710 - vrms lamp frequency f l 40 - 60 khz (2) inverter waveform asymmetry rate w asy -- 10% (5) distortion rate w dis -- 2 210 % startup voltage vs 25 c : 1,300 vrms (3) 0 c : 1,630 note) the waveform of the inverter output voltage must be area symmetric and the design of the inverter must have specifica tions for the modularized lamp. the performance of the back-light, 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 back-light and the inverter(miss lighting, flicker, etc.) never occur. when you confirm it, the module should be operated in the same co ndition as it is installed in your instrument. note (1) lamp current is measured with current meter for high frequency as shown below. refer to the block diagram of the back-light unit in the next page for more information. specified values are for a single lamp. lcd module inverter (sk1700a) a hot (pink) cold (white) hot (blue) cold (black) hot (pink) cold (white) hot (blue) cold (black) (2) lamp frequency may produce interference wit h horizontal synchronous frequency which 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.
doc . no pie01_LTM190E4-L03 page /31 (3) because the inverter uses high voltage, please disconnect it from the power before assembling or disassembling. (4) because the inverter uses high voltage, please disconnect it from the power before assembling or disassembling. (5) the output of the inverter must have symmetrical(negative and positive) voltage waveform and current waveform. please do not use the inverter which has unsym metrical voltage and current and spike wave. designing a system inverter intended to have better display performance, power efficiency and lamp reliability, p lease follow the requirements the below. they would help increase the lamp lifetime and reduce leakage current. a. the asymmetry rate of the inverter waveform should be less than 10%. b. the distortion rate of the waveform should be within 2 210%. * inverter output waveform had bette r be more similar to ideal sine wave. i p i -p * asymmetry rate: | i p ?i ?p | / i rms x 100% * distortion rate i p (or i ?p ) / i rms i p i -p i p i -p * asymmetry rate: | i p ?i ?p | / i rms x 100% * distortion rate i p (or i ?p ) / i rms
doc . no pie01_LTM190E4-L03 page /31 4. block diagram 4.1 tft lcd module tft lcd data driver(column) gate driver (row) lcd drive analog circuit timing controller rsds lvds ds90c 386 odd even input connector lvds signals dc power supply memory lru6122m0 tft lcd data driver(column) gate driver (row) lcd drive analog circuit timing controller rsds lvds ds90c 386 odd even input connector lvds signals dc power supply memory lru6122m0 4.2 back-light unit connector : yeonho 35001hs-02l or equivalent lamp(ccfl) cold(white) hot(pink) 1 2 lamp(ccfl) cold(black) hot(blue) 3 4 lamp(ccfl) cold(white) hot(pink) 1 2 lamp(ccfl) cold(black) hot(blue) 3 4
doc . no pie01_LTM190E4-L03 page /31 5. input terminal pin assignment 5.1. input signal & power ( connector : uju in-30-bb 100 or equivalent ) pin no symbol function 1 rxo0- negative transmission data of pixel 0 (odd data) 2 rxo0+ positive transmission data of pixel 0 (odd data) 3 rxo1- negative transmission data of pixel 1 (odd data) 4 rxo1+ positive transmission data of pixel 1 (odd data) 5 rxo2- negative transmission data of pixel 2 (odd data) 6 rxo2+ positive transmission data of pixel 2 (odd data) 7 gnd power ground 8 rxoc- negative sampling clock (odd data) 9 rxoc+ positive sampling clock (odd data) 10 rxo3- negative transmission data of pixel 3 (odd data) 11 rxo3+ positive transmission data of pixel 3 (odd data) 12 rxe0- negative transmission data of pixel 0 (even data) 13 rxe0+ positive transmission data of pixel 0 (even data) 14 gnd power ground 15 rxe1- negative transmission data of pixel 1 (even data) 16 rxe1+ positive transmission data of pixel 1 (even data) 17 gnd power ground 18 rxe2- negative transmission data of pixel 2 (even data) 19 rxe2+ positive transmission data of pixel 2 (even data) 20 rxec- negative sampling clock (even data) 21 rxec+ positive sampling clock (even data) 22 rxe3- negative transmission data of pixel 3 (even data) 23 rxe3+ positive transmission data of pixel 3 (even data) 24 gnd power ground 25 *ce for lcd internal use only. do not connect 26 *ctl for lcd internal use only. do not connect 27 nc no connection 28 v dd power supply : +5v 29 v dd 30 v dd note ) refer to page 29 for the 1st pin of interface connector marked with ? . * if the system already uses the 25, 26pins, it should keep under gnd level. the voltage applied to those pins should not exceed -200mv.
doc . no pie01_LTM190E4-L03 page /31 5.2 lvds interface(1) 5.2.1 odd pixel data (1st pixel data) 1st lvds transmitter ( ds90c383, ds90c385 ) signal interface device input pin device input signal output signal to ltm190e4 interface ( cn101 ) no symbol symbol function terminal symbol 51 txin0 ro0 red odd pixel data (lsb) txout0- txout0+ no. 1 no. 2 rxo0- rxo0+ 52 txin1 ro1 red odd pixel data 54 txin2 ro2 red odd pixel data 55 txin3 ro3 red odd pixel data 56 txin4 ro4 red odd pixel data 2 txin5 ro7 red odd pixel data (msb) txout3- txout3+ no. 10 no. 11 rxo3- rxo3+ 3 txin6 ro5 red odd pixel data txout0- txout0+ no. 1 no. 2 rxo0- rxo0+ 4 txin7 go0 green odd pixel data (lsb) 6txin8 go1 greenoddpixeldata txout1- txout1+ no. 3 no. 4 rxo1- rxo1+ 7txin9 go2 greenoddpixeldata 8 txin10 go6 green odd pixel data txout3- txout3+ no. 10 no. 11 rxo3- rxo3+ 10 txin11 go7 green odd pixel data (msb) 11 txin12 go3 green odd pixel data txout1- txout1+ no. 3 no. 4 rxo1- rxo1+ 12 txin13 go4 green odd pixel data 14 txin14 go5 green odd pixel data 15 txin15 bo0 blue odd pixel data (lsb) 16 txin16 bo6 blue odd pixel data txout3- txout3+ no. 10 no. 11 rxo3- rxo3+ 18 txin17 bo7 blue odd pixel data (msb) 19 txin18 bo1 blue odd pixel data txout1- txout1+ no. 3 no. 4 rxo1- rxo1+ 20 txin19 bo2 blue odd pixel data txout2- txout2+ no. 5 no. 6 rxo2- rxo2+ 22 txin20 bo3 blue odd pixel data 23 txin21 bo4 blue odd pixel data 24 txin22 bo5 blue odd pixel data 50 txin27 ro6 red odd pixel data txout3- txout3+ no. 10 no. 11 rxo3- rxo3+
doc . no pie01_LTM190E4-L03 page /31 5.2.2 even pixel data (2nd pixel data) 2nd lvds transmitter ( ds90c383, ds90c385 ) signal interface device input pin device input signal output signal to ltm190e4 interface ( cn101 ) no symbol symbol function terminal symbol 51 txin0 re0 redevenpixeldata(lsb) txout0- txout0+ no. 12 no. 13 rxe0- rxe0+ 52 txin1 re1 redevenpixeldata 54 txin2 re2 redevenpixeldata 55 txin3 re3 redevenpixeldata 56 txin4 re4 redevenpixeldata 2 txin5 re7 red even pixel data (msb) txout3- txout3+ no. 22 no. 23 rxe3- rxe3+ 3 txin6 re5 red even pixel data txout0- txout0+ no. 12 no. 13 rxe0- rxe0+ 4 txin7 ge0 green even pixel data (lsb) 6 txin8 ge1 green even pixel data txout1- txout1+ no. 15 no. 16 rxe1- rxe1+ 7 txin9 ge2 green even pixel data 8 txin10 ge6 green even pixel data txout3- txout3+ no. 22 no. 23 rxe3- rxe3+ 10 txin11 ge7 green even pixel data (msb) 11 txin12 ge3 green even pixel data txout1- txout1+ no. 15 no. 16 rxe1- rxe1+ 12 txin13 ge4 green even pixel data 14 txin14 ge5 green even pixel data 15 txin15 be0 blue even pixel data (lsb) 16 txin16 be6 blue even pixel data txout3- txout3+ no. 22 no. 23 rxe3- rxe3+ 18 txin17 be7 blue even pixel data (msb) 19 txin18 be1 blue even pixel data txout1- txout1+ no. 15 no. 16 rxe1- rxe1+ 20 txin19 be2 blue even pixel data txout2- txout2+ no. 18 no. 19 rxe2- rxe2+ 22 txin20 be3 blue even pixel data 23 txin21 be4 blue even pixel data 24 txin22 be5 blue even pixel data 50 txin27 re6 red even pixel data txout3- txout3+ no. 22 no. 23 rxe3- rxe3+
doc . no pie01_LTM190E4-L03 page /31 5.3 lvds interface (2) 5.3.1 odd pixel data (1st pixel data) lvds transmitter ( ds90c387 ) signal interface device input pin device input signal output signal to ltm190e4 interface ( cn101 ) no symbol symbol function terminal symbol 10 r10 ro0 red odd pixel data (lsb) a0m a0p no. 1 no. 2 rxo0- rxo0+ 9 r11 ro1 red odd pixel data 8 r12 ro2 red odd pixel data 7 r13 ro3 red odd pixel data 6 r14 ro4 red odd pixel data 3 r17 ro7 red odd pixel data (msb) a3m a3p no. 10 no. 11 rxo3- rxo3+ 5 r15 ro5 red odd pixel data a0m a0p no. 1 no. 2 rxo0- rxo0+ 2 g10 go0 green odd pixel data (lsb) 1 g11 go1 green odd pixel data a1m a1p no. 3 no. 4 rxo1- rxo1+ 100 g12 go2 green odd pixel data 94 g16 go6 green odd pixel data a3m a3p no. 10 no. 11 rxo3- rxo3+ 93 g17 go7 green odd pixel data (msb) 99 g13 go3 green odd pixel data a1m a1p no. 3 no. 4 rxo1- rxo1+ 96 g14 go4 green odd pixel data 95 g15 go5 green odd pixel data 92 b10 bo0 blue odd pixel data (lsb) 86 b16 bo6 blue odd pixel data a3m a3p no. 10 no. 11 rxo3- rxo3+ 85 b17 bo7 blue odd pixel data (msb) 91 b11 bo1 blue odd pixel data a1m a1p no. 3 no. 4 rxo1- rxo1+ 90 b12 bo2 blue odd pixel data a2m a2p no. 5 no. 6 rxo2- rxo2+ 89 b13 bo3 blue odd pixel data 88 b14 bo4 blue odd pixel data 87 b15 bo5 blue odd pixel data 4 r16 ro6 red odd pixel data a3m a3p no. 10 no. 11 rxo3- rxo3+
doc . no pie01_LTM190E4-L03 page /31 5.3.2 even pixel data (2nd pixel data) lvds transmitter ( ds90c387 ) signal interface device input pin device input signal output signal to ltm190e4 interface ( cn101 ) no symbol symbol function terminal symbol 84 r20 re0 red even pixel data (lsb) a4m a4p no. 12 no. 13 rxe0- rxe0+ 81 r21 re1 red even pixel data 80 r22 re2 red even pixel data 79 r23 re3 red even pixel data 78 r24 re4 red even pixel data 75 r27 re7 red even pixel data (msb) a7m a7p no. 22 no. 23 rxe3- rxe3+ 77 r25 re5 red even pixel data a4m a4p no. 12 no. 13 rxe0- rxe0+ 74 g20 ge0 green even pixel data (lsb) 73 g21 ge1 green even pixel data a5m a5p no. 15 no. 16 rxe1- rxe1+ 72 g22 ge2 green even pixel data 66 g26 ge6 green even pixel data a7m a7p no. 22 no. 23 rxe3- rxe3+ 65 g27 ge7 green even pixel data (msb) 71 g23 ge3 green even pixel data a5m a5p no. 15 no. 16 rxe1- rxe1+ 70 g24 ge4 green even pixel data 69 g25 ge5 green even pixel data 64 b20 be0 blue even pixel data (lsb) 58 b26 be6 blue even pixel data a7m a7p no. 22 no. 23 rxe3- rxe3+ 57 b27 be7 blue even pixel data (msb) 63 b21 be1 blue even pixel data a5m a5p no. 15 no. 16 rxe1- rxe1+ 62 b22 be2 blue even pixel data a6m a6p no. 18 no. 19 rxe2- rxe2+ 61 b23 be3 blue even pixel data 60 b24 be4 blue even pixel data 59 b25 be5 blue even pixel data 76 r26 re6 red even pixel data a7m a7p no. 22 no. 23 rxe3- rxe3+ note) mustbeconnected24thbalpinwithlowand23thdualpinwithhighinds90c387lvds transmitter
doc . no pie01_LTM190E4-L03 page /31 5.4 back-light unit pin no. input color function upper 1 hot1 pink high voltage 2 cold1 white ground 3 hot2 blue high voltage 4 cold2 black ground lower 1 hot1 pink high voltage 2 cold1 white ground 3 hot2 blue high voltage 4 cold2 black ground connector part no. yeonho 35001hs-02l or equivalent
doc . no pie01_LTM190E4-L03 page /31 5.5 input signals, basic display colors and gray scale of each color color display (8bit) data signal gray scale level red green blue r0 r1 r2 r3 r4 r5 r6 r7 g0 g1 g2 g3 g4 g5 g6 g7 b0 b1 b2 b3 b4 b5 b6 b7 basic color black 000000000000000000000000 - blue 000000000000000011111111 - green 000000001111111100000000 - cyan 000000001111111111111111 - red 111111110000000000000000 - magenta111111110000000011111111 - yellow 111111111111111100000000 - white 111111111111111111111111 - gray scale of red black 000000000000000000000000 r0 dark ? - light 100000000000000000000000 r1 010000000000000000000000 r2 :::::: :::::: :::::: r3~ r252 :::::: :::::: :::::: 101111110000000000000000 r253 011111110000000000000000 r254 red 111111110000000000000000 r255 gray scale of green black 000000000000000000000000 g0 dark ? - light 000000001000000000000000 g1 000000000100000000000000 g2 :::::: :::::: :::::: g3~ g252 :::::: :::::: :::::: 000000001011111100000000 g253 000000000111111100000000 g254 green 000000001111111100000000 g255 gray scale of blue black 000000000000000000000000 b0 dark ? - light 000000000000000010000000 b1 000000000000000001000000 b2 :::::: :::::: :::::: b3~ b252 :::::: :::::: :::::: 000000000000000010111111 b253 000000000000000001111111 b254 blue 000000000000000011111111 b255 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
doc . no pie01_LTM190E4-L03 page /31 6. interface timing 6.1 timing parameters ( de only mode ) signal item symbol min. typ. max. unit note clock frequency 1/t c 40.9 54.0 68.4 mhz (1), (2) high time t ch 4--nsec low time t cl 4--nsec data setup time t ds 4--nsec hold time t dh 4--nsec data enable setup time t es 4--nsec frame frequency cycle tv 16.95 16.7 13.1 msec 1032 1066 1450 lines frequency 1/tv 59 60 76 hz (3) vertical active display term display period t vd 1024 1024 1024 lines vertical blank period t vb 8 - - lines one line scanning time cycle t h 672 844 1023 clocks horizontal active display term display period t hd 640 640 640 clocks note (1) test point : ttl control signal and clk at lvds tx input terminal in system (2) internal vcc = 3.3v (3) at low vsync frequency, under 60hz, flicker level can increase at specific pattern.
doc . no pie01_LTM190E4-L03 page /31 6.2 timing diagrams of interface signal ( de only mode ) data signals de t vd t v t h d clk t c de t hd t vb 0.5 v cc t es t ds t dh t ch t cl t c de display data d clk 0.5 v cc 0.5 v cc
doc . no pie01_LTM190E4-L03 page /31 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. power supply v dd 0.9 v dd 0.9 v dd 0v 0 v valid signals t 3 300 k? t 1 ? 10msec 0 ? t 2 ? 50 msec 0 ? t 3 ? 50 msec 1sec ? t 4 t 1 t 2 t 4 0.1 v dd 0.1 v dd back-light(recommended) 500 msec ? t 5 100 msec ? t 6 power on power off t 5 t 6 50% 50% power supply v dd 0.9 v dd 0.9 v dd 0v 0 v valid signals t 3 300 k? t 1 ? 10msec 0 ? t 2 ? 50 msec 0 ? t 3 ? 50 msec 1sec ? t 4 t 1 t 2 t 4 0.1 v dd 0.1 v dd back-light(recommended) 500 msec ? t 5 100 msec ? t 6 power on power off t 5 t 6 50% 50% 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 v dd . (2) 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 become abnormal screen. (3) in case of v dd = off level, please keep the level of input signals low or keep a high impedance. (4) t4 should be measured after the module has been fully discharged between power off and on period. (5) interface signal should not be kept at high impedance when the power is on.
doc . no pie01_LTM190E4-L03 page /31 6.4 v dd power dip condition 4.5v ? v dd ? 5.5v if v dd (typ) x 20% ? vcc ? v dd (typ) x 10%, then, 0

doc . no pie01_LTM190E4-L03 page /31 6.5 lvds input characteristics 6.5.1 lvds receiver input symbol parameter conditions min typ max unit note v th lvds input high threshold v cmlvds = 1.25v +100 mv v tl lvds input low threshold -100 mv v cmlvds lvds input common mode voltage 1.125 1.25 1.375 v i in input current v in =2.4v/0v v dd =3.6v -10 +10 u t skew skew between lvds clock & lvds data -250 0 250 psec (1) note (1) lvds skew v diff = 0v t skew1 differential differential lvds clk lvds data rx+/- t v diff = 0v v diff = 0v t skew1 differential differential lvds clk lvds data rx+/- t v diff = 0v where t skew : skew between lvds clock & lvds data, t : 1 period time of lvds clock cf) (-/+) of 250psec means lvds data goes before or after lvds clock.
doc . no pie01_LTM190E4-L03 page /31 7. outline dimension [ refer to the next page ]

doc . no pie01_LTM190E4-L03 page /31 8. general precautions 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 or bend the modules. (b) because the inverter 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 ccft back-light. (d) note that polarizers are very fragile and could be easily damaged. do not press or scratch the surface using the harder than a hb pencil lead. (e) wipe off water droplets or oil immediately. if you leave the droplets for a long time, staining and discoloration may occur. (f) if the surface of the polarizer is dirty, clean it using some absorbent cotton or soft cloth. (g) the desirable cleaners are water, ipa(isopropyl alcohol) or hexane. do not use ketone type materials(ex. a cetone), 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 thoroughly with soap. (i) protect the module from static which may cause damage to the cmos gate array ic. (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.
doc . no pie01_LTM190E4-L03 page /31 8.2 storage (a) do not leave the module in high temperature, 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-lcd module in direct sunlight. (c) the module should be stored in a dark place. it is prohibited to apply sunlight or fluorescent light in storage. 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 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 others (a) ultra-violet ray filter is necessary for outdoor operation. (b) avoid condensation of water which 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, andsoon) 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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