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doc. no : pi004 1 samsung t f t -lcd product information prepared by : samsung electronics co., ltd. amlcd application engineering group issue date : 98-12-23 model : LT150X1-151 note : this product information is subject to change after 3 months of issuing date.
doc. no : pi004 2 samsung t f t -lcd - - - - - - - - - - - - - - - - - - - ( 3 ) - - - - - - - - - - - - - - - - - - - ( 4 ) - - - - - - - - - - - - - - - - - - - ( 5 ) - - - - - - - - - - - - - - - - - - - ( 8 ) - - - - - - - - - - - - - - - - - - - ( 11 ) - - - - - - - - - - - - - - - - - - - ( 12 ) - - - - - - - - - - - - - - - - - - - ( 15 ) - - - - - - - - - - - - - - - - - - - ( 20 ) - - - - - - - - - - - - - - - - - - - ( 21 ) general description 1. electrical absolute characteristics 1.1 tft lcd module 1.2 back-light unit 2. optical characteristics 3. electrical characteristics 3.1 tft lcd module 3.2 back-light unit 4. block diagram 4.1 tft lcd module 4.2 back-light unit 5. input terminal pin assignment 5.1 input signal & power 5.2 back-light unit 5.3 input signal,basic display colors and gray scale of each colors 6. interface timing 6.1 timing parameters (sync & de mode) 6.2 timing diagrams of interface signal (sync & de mode) 6.3 timing parameters (de only mode) 6.4 timing diagrams of interface signal (de only mode) 6.5 power on/off sequence 7. outline dimension 8. general precautions 8.1 handling 8.2 storage 8.3 operation 8.4 others contents
doc. no : pi004 3 samsung t f t -lcd general description description LT150X1-151 is a color active matrix tft (thin film transistor) liquid crystal display (lcd) that uses amorphous silicon tft switching devices. this model is composed of a tft lcd panel, a driver circuit and a back-light system. the resolution of 15.0- inch contains 1,024 x 768 pixels and can display up to 262,144 colors. 6 o'clock direction is the optimum viewing angle. features ? high contrast ratio, high aperture structure ? wide viewing angle ? high-speed response ? xga(1024x768 pixels) resolution ? low power consumption ? 2 dual ccfts (cold cathode fluorescent tube) ? sync&de (data enable) mode and de only mode ? ttl interface with 2 pixels / clock applications ? desktop monitors ? display terminals for av application products ? monitors for industrial machine general specifications display area 304.128( h) x228.096(v) (15 inch diagonal ) pixel arrangement rgb vertical stripe item specification mm driver element a- si tft active matrix pixel pitch 0.297( h) x 0.297(w) mm haze 13 , hard - coating (3h) surface treatment unit normally white display mode note display colors 262,144 number of pixel 1024 x 768 pixel
doc. no : pi004 4 samsung t f t -lcd item typ. max. note module size weight 368 min. mechanical information horizontal (h) vertical (v) depth (d) 20 1550 mm mm mm 275 - - - - g 1.2 back-light unit item symbol lamp current i l min. unit. note 4.0 ma rms max. (1),(2) lamp frequency f l 30 80 khz ta = 25 2 c (1) 1. electrical absolute ratings 1.1 tft lcd module ( vss =gnd= 0 v) item symbol min. max. unit note power supply voltage v dd vss -0.3 6.0 v ( 1 ) 12.0 (2) specified values are for a dual lamp (refer to the note(1) in the page 10 for further information.). note (1) within ta (25 2 c) - - - - 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.
doc. no : pi004 5 samsung t f t -lcd 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 (4). measuring equipment : topcon bm-5a * ta = 25 2 c , v dd = 5v, fv = 60hz, f dclk =32.5mhz, i l = 11.2 marms response time at ta r x msec (1), (2), (4) (1), (3) color chromaticity ( cie ) red green blue white r y g x g y b x b y w x w y (1), (4) viewing angle hor . ver. q l f h q r f l f = 0, q = 0 - - - - normal viewing angle item symbol condition min. typ. max. unit contrast ratio (center of screen) cr rising t r falling t f - - - 200 - - - - 20 - cd /m 2 y l degrees note (1), (4) 30 - - - 200 - - - - - - - - - 60 60 55 55 - - - - - - - - luminance of white (center of screen) cr 5 > _ 0.619 0.343 0.298 0.595 0.146 0.104 0.294 0.325
doc. no : pi004 6 samsung t f t -lcd note 1) definition of viewing angle : viewing angle range (5 cr ) 6 o ? clock direction normal line q l q r f h f l 12 o ? clock direction q r =90 o q l =90 o f = 0 o , x x' y' y q = 0 o f h = 90 o f l = 90 o cr = luminance with all pixels white ( gmax ) note 2) definition of contrast ratio (cr) : ratio of gray max ( gmax ) ,gray min ( gmin ) at the center point of panel. luminance with all pixels black ( gmin ) note 3) definition of response time : note 3) definition of response time : sum of t r ,t f display data black(tft on) white(tft off) white(tft off) optical response 100% 90% 10% 0% t r t f time
doc. no : pi004 7 samsung t f t -lcd note 4) 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 back-light. this should be measured in the center of screen. dual lamp current : 11.2ma (5.6ma x 2 ,refer to the note(1) in the page 10 for further information.) environment condition : ta = 25 2 c optical characteristics measurement setup center of the screen tft-lcd module lcd panel photo-detector ( topcon bm-5a) 40 cm field = 2 o
doc. no : pi004 8 samsung t f t -lcd 3. electrical characteristics 3.1 tft lcd module note (1) mclk , vsync , hsync , de , ra0 ~ ra5 , ga0 ~ ga5 , ba0 ~ ba5 , rb0 ~ rb5 , gb0 ~ gb5 , bb0 ~ bb5 (2) f v =60hz, f dclk =32.5mhz, v dd = 5.0v, dc current. (3) 2 pixels/clock (4) power dissipation check pattern item symbol min typ max unit note input voltage high v ih low v il 2.64 - v dd v - v 0.6 gnd voltage of power supply v dd 4.75 5.0 5.25 v (1) ta = 25 2 c vsync frequency f v current of power supply ma (2)(4)* a - 640 hsync frequency f h main frequency f dclk - - - 60 - hz 48.3 - khz 32.5 - mhz (3) i dd rush current 2.5 a (5) 360 - - i rush white mosaic v.stripe 380 590 ma ma - - - - (2)(4)* b (2)(4)* c
doc. no : pi004 9 samsung t f t -lcd (5) measurement conditions note : control signal : high(+5v) -->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 5 v 5 v 12 v v dd ( lcd input) control signal (high to low) m2 2 sk1399 m1 2 sk1059 r2 1 k c2 10000 pf c3 1 uf r3 ( 47 k ) r1 47 k fuse c1 1 uf
doc. no : pi004 10 samsung t f t -lcd 3.2 back-light unit ta = 25 2 c note (1) dual lamp current is measured with current meter for high frequency as shown below. specified values are for a dual lamp. lcd module inverter a hot 1 ( pink ) hot 2 ( pink ) 1 2 4 cold ( white ) item symbol min typ max unit note lamp current 4.0 11.2 (1) ma rms lamp voltage lamp frequency - - 55 v rms khz (2) operating life time 20,000 hour - - 690 - 11.6 - (2) lamp frequency may produce interference with horizontal synchronous frequency and this may cause line flow on the display. therefore lamp frequency shall be detached from the horizontal synchronous frequency and its harmonics as far as possible in order to avoid interference. (3) life time (hr) of a lamp is defined as the time in which it continues to operate under the condition of ta = 25 2 c and i l = 10 marms until the brightness becomes 50% or lower than it ? s original value. (4) the voltage above this value should be applied to the lamps for more than 1 second to startup. otherwise the lamps may not to be turned on. (3) the back-light system is an edge-lighting type with 2 dual ccfts (cold cathode fluorescent tube). the characters of two dual lamps are shown in the following tables. refer to the block diagram of the back-light unit in the next page for more information. startup voltage 1100 (25 c ) 1420 (0 c ) vrms (4) vs - - 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 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 condition as it is installed in your instrument. ( sic -141) v l f l i l hr
doc. no : pi004 11 samsung t f t -lcd 4. block diagram 4.1 tft lcd module dc power supply timing converter lcd drive analog circuit data driver tft-lcd gate driver timing signal display data 4.2 back-light unit cold 1 hot 2 2 4 nc 3 cold 1 hot 2 2 4 nc 3 hot 1 hot 1
doc. no : pi004 12 samsung t f t -lcd 5. input terminal pin assignment 5.1. tft lcd module (interface signal & power) connector : hirose df14a-30p-1.25h 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 pin no. symbol function polarity remark vdd vdd gnd mclk gnd vsync hsync de gnd ra0(odd) ra1 ra2 ra3 ra4 ra5 gnd ga0(odd) ga1 ga2 ga3 ga4 ga5 gnd ba0(odd) ba1 ba2 ba3 ba4 ba5 gnd power supply [+5.0v] power supply [+5.0v] ground ground ground ground ground ground data clock vertical sync signal horizontal sync signal data enable red data [lsb] - odd red data red data red data red data red data [msb] -odd green data [lsb] - odd green data green data green data green data green data [msb] -odd blue data [lsb] -odd blue data blue data blue data blue data [msb] -odd blue data negative negative positive positive positive positive positive positive positive positive positive positive positive positive positive positive positive positive positive positive - - - - - - - - - (1) - - - - - - - - - positive matching socket : hirose df14-30s-1.25c - - - - - - - - - - - - - - - - - - - -
doc. no : pi004 13 samsung t f t -lcd 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 remark polarity function symbol pin no. gnd rb0(even) rb1 rb2 nc(gnd) rb3 rb4 rb5 gnd gb0(even) gb1 gb2 nc(gnd) gb3 gb4 gb5 gnd bb0(even) bb1 bb2 nc bb3 bb4 bb5 gnd ground ground ground no connection no connection no connection red data [lsb] -even red data red data red data red data red data [msb] -even green data [lsb] -even green data green data green data green data green data [msb] -even ground blue data [lsb] -even blue data blue data blue data blue data blue data [msb] -even - positive positive positive positive positive positive positive positive positive positive positive positive positive positive positive positive positive positive - - - - - - - - - - - - - connector : hirose df14a-25p-1.25h note (1) display data is sampled at the falling edge of data clock. matching socket : hirose df14-25s-1.25c - - - - - - - - - - - - - - - - - - 5.2 back-light unit pin no. input [ ch1 ] , [ ch2 ] 1 hot 1 2 cold 3 hot 2 connector part no. jst bhr-04vs-1 4 n.c color function pink pink white - high voltage high voltage no connection ground
doc. no : pi004 14 samsung t f t -lcd 5.3 input signal,basic display colors and gray scale of each colors 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 : pi004 15 samsung t f t -lcd display period t hd 512 512 512 clocks 6. interface timing 6.1 timing parameters ( sync&de mode ) signal item symbol min typ max unit clock data data enable horizontal sync vertical sync horizontal signal vertical signal frequency 1 / t c - 32.5 - mhz high time t ch 4 - - nsec low time t cl 4 - - nsec setup time t ds 4 - - nsec hold time t dh 4 - - nsec setup time t es 4 - - nsec cycle pulse width t hp - 68 - clocks t h - 20.68 - usec - 672 - clocks cycle pulse width t vp 1 - 35 lines t v 772 16.7 806 - msec lines display start t hs 148 148 148 clocks display start t vs - 35 - lines display period t vd 768 768 768 lines note (1) note (1) the duration of de [dtmg] signal must be longer than 1 clock period at every horizontal sync. period in case de is fixed ? low ? , panel operates by sync only mode. in this case, de signal shouldn ? t be kept ? high ? during operation.
doc. no : pi004 16 samsung t f t -lcd 6.2 timing diagrams of interface signal (sync&de mode) t v vsync hsync de t hp t h t c t hs t hd valid display data ( 512 clocks ) hsync dclk de data signals t vs t vp t vs t vd dclk de t c display data 2.64 v t ch t cl t ds t dh 2.64 v t es 50% 50% 0.6 v 2.64 v 50% 0.6 v
doc. no : pi004 17 samsung t f t -lcd 6.3 timing parameters ( de only mode ) signal item symbol min t yp max unit clock data data enable frame frequency frequency 1 / t c - 32.5 - mhz high time t ch 4 - - nsec low time t cl 4 - - nsec setup time t ds 4 - - nsec hold time t dh 4 - - nsec setup time t es 4 - - nsec note vertical active display term one line scanning time horizontal active display term cycle t v 772 16.7 806 - msec lines display period t v d 768 768 768 lines cycle t h - 672 - clocks display period t hd 512 512 512 clocks (1) note (1) when LT150X1-151 model is operated by de only mode, hsync and vsync input signals should be fixed to ? low ? for stable operation. otherwise, the module could operate abnormally.
doc. no : pi004 18 samsung t f t -lcd 6.4 timing diagrams of interface signal ( de only mode ) t vd t v de t h t c t hd valid display data ( 512 clocks) dclk de data signals dclk de t c display data 2.64 v t ch t cl t ds t dh 2.64 v t es 50% 50% 0.6 v 2.64 v 50% 0.6 v
doc. no : pi004 19 samsung t f t -lcd 6.5 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. 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 white. (3) in case of v dd = 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. (5) interface signal shall not be kept at high impedance when the power is on. power supply v dd 0.9 v dd 0.9 v dd 0 v 0 v valid signals t 3 0 t 1 10 msec 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 power on/off sequence back-light(recommended) 250 msec t 5 50 msec t 6 power on power off t 5 t 6 50% 50%
doc. no : pi004 20 samsung t f t -lcd 7. outline dimension
doc. no : pi004 21 samsung t f t -lcd 8. general precautions 8.1 handling (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 cause improper operation or damage to the module and ccft back-light. (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 leave 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(isopropyl alcohol) or hexane. do not use ketone type materials(ex. acetone), ethyl alcohol, toluene, ethyl acid or methyl chloride. it might permanent damage to the polarizer due to chemical reaction. (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 thoroughly with soap. (h) protect the module from static , it may cause damage to the cmos gate array ic. (i) use finger-stalls 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. (m) pins of i/f connector shall not be touched directly with bare hands.
doc. no : pi004 22 samsung t f t -lcd 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 c and relative humidity of less than 70%. (b) do not store the tft-lcd module in direct sunlight. (c) the module shall be stored in a dark place. it is prohibited to apply sunlight or fluorescent light during the store. 8.3 operation (a) do not connect,disconnect the module in the ? power on ? condition. (b) power supply should always be turned on/off by the item 6.5 ? power on/off sequence ? . (c) module has high frequency circuits. sufficient suppression to the electromagnetic interference shall 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 shall be a minimized length and be connected directly . the 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. 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. (e) this module has its circuitry pcb ? s on the rear side and should be handled carefully in order not to be stressed.

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