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| product specification 1/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 specification for approval ( ) preliminary specification ( ) final specification 27 full hd tft lcd title model buyer lm270wf1 *model tla1 suffix lg. display co., ltd. supplier *when you obtain standard approval, please use the above model name without suffix please return 1 copy for your confirmation with your signature and comments. / / / signature date approved by mnt products engineering dept. lg. display lcd co., ltd k.h. lee / engineer prepared by d.i. chung / manager reviewed by h.s. kim / g.manager signature date approved by general pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com
product specification 2/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 contents 14 8 interface connections 3-2 color input data refernece 3-5 28 designation of lot mark 8-1 28 packing form 8-2 28 packing 8 29 precautions 9 27 emc 7-2 1 cover 2 contents 3 record of revisions 4 general description 1 5 absolute maximum ratings 2 6 electrical specifications 3 6 electrical charactreistics 3-1 12 signal timing specifications 3-3 13 signal timing waveforms 3-4 15 power sequence 3-6 17 optical sfecifications 4 23 mechanical characteristics 5 26 reliablity 6 27 international standards 7 27 safety 7-1 page item no pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 3/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 record of revisions first draft(preliminary) - july. 2. 2008 0.0 description page revision date revision no pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 4/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 1. general description general features view angle free (r/l 170(typ.), u/d 160(typ.)) viewing angle(cr>10) 0.3114 mm x 0.3114 mm pixel pitch 8-bit with a-frc, 16,777,216 colors color depth 1920 horiz. by 1080 vert. pixels rgb stripes arrangement pixel format 400 cd/m 2 (center 1 point) luminance, white total 88.95 watt (typ.) ( 5.35 watt @v lcd , 83.6 watt @400cd/ O ]) power consumption 4220 g (typ.) weight transmissive mode, normally white display operating mode hard coating(3h) & anti-glare treatment of the front polarizer surface treatment 630(h) x 368.2(v) x 37.2 (d) mm(typ.) *without inverter outline dimension 27 inches(68.6cm) diagonal active screen size lm270wf1 is a color active matrix liquid crystal display with anintegral cold cathode fluorescent lamp(ccfl) backlight system without inverter . the matrix employs a-si thin film transistor as the active element. it is a transmissivetype display operating in the normally black mode. it has a 27 inch diagonally measured active display area with full hd resolution (1080 vertical by 1920 horizontal pixel array) each pixel is divided into red, green and blue sub-pixels or dots which are arranged in vertical stripes. gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal for each dot, thus, presenting a palette of more than 16,7m colors with advanced-frc (frame rate control).. it has been designed to apply the interface method that enables low power, high speed, low emi. fpd link or compatible must be used as a lvds (low voltage differential signaling) chip. it is intended to support applications where thin thickness, wide viewing angle, low powerare critical factors and graphic displays are important. it is intended to support displays where high brightness, super wide viewing angle, high color saturation, and high color are important. tft-lcd panel (1920 1080 pixels) source driver circuit timing control block power circuit block cn1 (30pin) rgb, dclk, de hsync, vsync (lvds 2 port) v lcd (12.0v) g1080 g1 s1920 s1 g a t e d r i v e r c i r c u i t back light assembly (direct light type_ u shape 7 ccfl) cn 2 2pin x 8cns (high) figure 1. block diagram v lamp pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 5/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 2. absolute maximum ratings the following are maximum values which, if exceeded, may cause faulty operation or damage to the unit. note : 1. temperature and relative humidity range are shown in the figure below. wet bulb temperature should be 39 c max, and no condensation of water. table 1. absolute maximum ratings units %rh 90 10 h op operating ambient humidity %rh 90 10 h st storage humidity c 60 -20 t st storage temperature 1 c 50 0 t op operating temperature at 25 2 c vdc 12.4 -0.3 v lcd power input voltage max min parameter notes values symbol 90% 10 20 30 40 50 60 70 80 0 -20 0 10 20 30 40 50 dry bulb temperature [c] wet bulb temperature [c] storage operation h u m i d i t y [ ( % ) r h ] 10% 40% 60% 60 figure 2. temperature and relative humidity pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 6/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 3. electrical specifications 3-1. electrical characteristics table 2-1. electrical characteristics ohm 110 100 90 zm differential impedance 2 watt 5.62 5.35 - p c typ 1 mv p-p 400 v drf permissive power input ripple 2 ma 468 445 - 3 watt 7.10 6.71 - p c max power consumption 4 a 3.0 - - i rush rush current vdc 12.4 12.0 11.6 v lcd power supply input voltage 3 ma 592 559 - i lcd power supply input current module : parameter symbol max typ min notes unit values note : 1. permissive power ripple should be measured under vcc=12.0v, 25 c, fv(framefrequency)=max conditionand at that time, we recommend the bandwidth configuration of oscilloscope is to be under 20mhz. see the next page. 2. the specified current and power consumption are under the v lcd =12.0v, 25 2 c,f v =60hz condition whereas mosaic and max power pattern shown in the [ figure 3 ] is displayed. 3. the current is specified at the maximum current pattern. 4. maximum condition of inrush current : the duration of rush current is about 2ms and rising time ofinput voltage is 1ms(min.). at any rising time of input voltage, keep the i2t value by below condition condition : i2t < 32*2ms it requires two power inputs. one is employed to power the lcd electronics and to drive the tft array and liquid crystal. the second input power for the ccfl, is typically generated by an inverter. the inverter is an external unit to the lcds. pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 7/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 white pattern black pattern ? permissive power input ripple ( vcc=5.0v, 25 c, fv(framefrequency)=max condition ) ? power consumption ( vcc=5.0v, 25 c, fv(frame frequency=60hz condition ) figure 3. mosaic pattern & black pattern for power consumption measurement typical power pattern max power pattern pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 8/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 table 2_2. electrical characteristics note : the design of the inverter must have specifications for the lamp in lcd assembly . the performance of the lamp in lcm, for example life time or brightness, is extremely influenced by the characteristics of the dc-ac inverter. so all the parameters of an inverter should be carefully designed so as not to produce too much leakage current fromhigh-voltage output of the inverter. when you design or order the inverter, please make sure unwanted lighting caused by the mismatch of the lamp and the inverter (no lighting, flicker, etc) never occurs. when you confirm it, the lcd C assembly should be operated in the same condition as installed in you instrument. do not attach a conducting tape to lamp connecting wire. if the lamp wire attach to a conducting tape, tft-lcd module has a low luminance and the inverter has abnormal action. because leakage current is occurred between lamp wire and conducting tape. 1. specified values are for a single lamp. 2. operating voltage is measured at 25 2 c. the variance of the voltage is 10%. 3. the voltage above v s should be applied to the lamps for more than 1 second for start-up. (inverter open voltage must be more than lamp startingvoltage.) otherwise, the lamps may not be turned on. the used lamp current is the lamp typical current. 4. lamp frequency may produce interface with horizontal synchronous frequency and as a result this may cause beat on the display. therefore lamp frequency shall be as away possible from the horizontal synchronous frequency and from its harmonics in order to prevent interference. 5. let s define the brightness of the lamp after being lighted for 5 minutes as 100%. t s is the time required for the brightness of the center of the lamp to be not less than 95%. 6. the lamp power consumption shown above does not include loss of external inverter. the used lamp current is the lamp typical current. (p bl = v bl x i bl x n lamp ) 7. the life is determined as the time at which brightness of thelamp is 50% compared to that of initial value at the typical lamp current on condition of continuousoperating at 25 2 c. 6 watt 93.1 83.6 47.3 p bl power consumption 1, 5 min 3.0 ts discharge stabilization time at 0 c at 25 c v rms 3600 - - 4 khz 80 - 40 f bl operating frequency 1, 3 vs established starting voltage v rms 3000 - - 1, 2 v rms 2250(3.0ma) 1990(6.0ma) 1900(7.0ma) v bl operating voltage 1 ma rms 7.0 6.0 3.0 i bl operating current lamp : 1, 7 hrs 40,000 life time parameter symbol max typ min notes unit values pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 9/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 i p i -p * asymmetry rate: | i p C i C p | / i rms x 100% * distortion rate i p (or i C p ) / i rms 8. the output of the inverter must have symmetrical(negative andpositive) voltage waveform and symmetrical current waveform (unsymmetrical ratio is less than 10%). please do not use the inverter which has unsymmetrical voltage and unsymmetrical current and spike wave. requirements for a system inverter design, which is intended to have a better display performance, a better power efficiency and a more reliable lamp, are following. it shall 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 10%. * inverter output waveform had better be more similar to ideal sine wave. 9. the inverter which is combined with this lcm, is highly recommended to connect coupling(ballast) condenser at the high voltage output side. when you usethe inverter which has not coupling(ballast) condenser, it may cause abnormal lamp lighting because of biased mercury as time goes. 10.in case of edgy type back light with over 4 parallel lamps, input current and voltage wave form should be synchronized pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 10/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 3-2. interface connections table 3 module connector(cn1) pin configuration this lcd employs two interface connections, a 30 pin connector is used for the module electronics and a 14pin connector is used for the integral backlight system. 3-2-1. lcd module note: 1. all gnd(ground) pins should be connected together and to vss which should also be connected to the lcd s metal frame. 2. all v lcd (power input) pins should be connected together. 3. input level of lvds signal is based on the iea 664standard. #1 #30 #1 #30 rear view of lcm v lcd v lcd odc dcr_out nc nc gnd sr3p sr3m sclkinp sclkinm sr2p sr2m gnd sr1p symbol 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 no power supply +12.0v power supply +12.0v odc control (gnd:dcr on, 3.3v:dcr off) dynamic c/r output no connection no connection ground plus signal of even channel 3 (lvds) minus signal of even channel 3 (lvds) plus signal of even clock channel (lvds) minus signal of even clock channel (lvds) plus signal of even channel 2 (lvds) minus signal of even channel 2 (lvds) ground plus signal of even channel 1 (lvds) symbol minus signal of even channel 1 (lvds) ground plus signal of even channel 0 (lvds) minus signal of even channel 0 (lvds) plus signal of odd channel 3 (lvds) minus signal of odd channel 3 (lvds) plus signal of odd clock channel (lvds) minus signal of odd clock channel (lvds) ground plus signal of odd channel 2 (lvds) minus signal of odd channel 2 (lvds) plus signal of odd channel 1 (lvds) minus signal of odd channel 1 (lvds) plus signal of odd channel 0 (lvds) minus signal of odd channel 0 (lvds) description sr1m 15 gnd 14 sr0p 13 sr0m 12 fr3p 11 fr3m 10 fclkinp 9 fclkinm 8 gnd 7 fr2p 6 fr2m 5 fr1p 4 fr1m 3 fr0p 2 fr0m 1 symbol no -lcd connector(cn1): kdf71g-30s-1h, (manufactured by hirose ) -mating connector : fi-x30c2l (manufactured by jae) or equivalent kdf71g-30s-1h [ figure 4 ] connector diagram pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 11/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 table 4. required signal assignment for flat link (ti:sn75lvds83) transmitter notes : refer to lvds transmitter data sheet for detail descriptions. pin # require signal pin name pin # require signal pin name 1 power supply for ttl input v cc 29 ground pin for ttl gnd 2 ttl input (r7) d5 30 ttl input (de) d26 3 ttl input (r5) d6 31 ttl level clock input t x clkin 4 ttl input (g0) d7 32 power down input pwr dwn 5 ground pin for ttl gnd 33 ground pin for pll pll gnd 6 ttl input (g1) d8 34 power supply for pll pll v cc 7 ttl input (g2) d9 35 ground pin for pll pll gnd 8 ttl input (g6) d10 36 ground pin for lvds lvds gnd 9 power supply for ttl input v cc 37 positive lvds differential data output 3 txout3 10 ttl input (g7) d11 38 negative lvds differential data output 3 txout3 11 ttl input (g3) d12 39 positive lvds differential clock output t x clkout 12 ttl input (g4) d13 40 negative lvds differential clock output t x clkout 13 ground pin for ttl gnd 41 positive lvds differential data output 2 t x out2 14 ttl input (g5) d14 42 negative lvds differential data output 2 t x out2 15 ttl input (b0) d15 43 ground pin for lvds lvds gnd 16 ttl input (b6) d16 44 power supply for lvds lvds v cc 17 power supply for ttl input v cc 45 positive lvds differential data output 1 t x out1 46 negative lvds differential data output 1 t x out1 18 ttl input (b7) d17 47 positive lvds differential data output 0 t x out0 48 negative lvds differential data output 0 t x out0 19 ttl input (b1) d18 20 ttl input (b2) d19 49 ground pin for lvds lvds gnd 21 ground pin for ttl input gnd 22 ttl input (b3) d20 23 ttl input (b4) d21 50 ttl input (r6) d27 51 ttl input (r0) d0 24 ttl input (b5) d22 25 ttl input (rsvd) d23 52 ttl input (r1) d1 53 ground pin for ttl gnd 26 power supply for ttl input v cc 54 ttl input (r2) d2 55 ttl input (r3) d3 27 ttl input (hsync) d24 56 ttl input (r4) d4 28 ttl input (vsync) d25 pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 12/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 lvds input characteristics notes unit max min symbol description 85mhz > fclk 65mhz ps + 400 -400 t skew lvds clock to data skew margin - - - 65mhz > fclk 25mhz % 3 - f dev maximum deviation of input clock frequency during ssc khz 200 - f mod maximum modulation frequency of input clock during ssc -1/7 -600 t clk + 1/7 t skew_eo lvds clock to clock skew margin (even to odd) ps + 600 t skew - v 2.1 0.3 v in lvds input voltage range - v 1.8 0.6 v cm lvds common mode voltage - mv 600 100 |v id | lvds differential voltage notes unit max min symb ol description 1. dc specification 2. ac specification pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 13/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 < clock skew margin between channel > < lvds data format > 3. data format 1) lvds 2 port < spread spectrum > time f center f max f min f mod 1 f center * f dev freq. pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 14/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 2) lvds 1 port g0 r5 r4 r3 r2 r1 r0 b1 b0 g5 g4 g3 g2 g1 de vsync hsync b5 b4 b3 b2 x b7 b6 g7 g6 r7 r6 r1 r0 g2 g1 b3 b2 r7 r6 g0 b1 de x current(nth) cycle r5 r4 b0 g5 vsync hsync b7 b6 r3 r2 g4 g3 b5 b4 g7 g6 previous(n-1)thcycle next(n+1)thcycle rclk+ ra+/- rb+/- rc+/- rd+/- pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 15/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 table 5. backlight connector pin configuration(cn1,cn2,cn3,cn4,cn5,cn6, cn7) product specification 16/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 3-3. signal timing specifications this is signal timing required at the input of the tmds transmitter. all of the interface signal timing should be satisfied with the following specifications for it s proper operation. table 5. timing table note: hsyncperiod and hsyncwidth-active should be even number times of t clk . if thevalue is odd number times of t clk , display control signal can be asynchronous.in order tooperate this lcm a hsync, vsyn, and de(data enable) signals should be used. 1. the performance of the electro-optical characteristics may be influenced by variance of the vertical refresh rates. 2. vsyncand hsyncshould be keep the above specification. 3. hsyncperiod, hsyncwidth, and horizontal back porch should be any times of of character number(8). 4. the polarity of hsync, vsyncis not restricted. 160 128 48 thb horizontal blank tclk 960 960 960 thv horizontal valid thp 80 20 10 tvb vertical blank thp 1080 1080 1080 tvv vertical valid thp 16 4 2 twv width hz 75 60 50 fv frequency thp 1160 1100 1090 tvp period 64 48 24 thbp horizontal back porch 48 48 16 thfp horizontal front porch tclk 48 32 8 twh width khz 32 8 5 tvbp vertical back porch 32 8 3 tvfp vertical front porch 83 66 64 fh frequency tclk 1120 1088 1008 thp period hsync vsync mhz 82.5 72 65 - frequency ns 15.38 13.89 11.76 tclk period dclk note unit max typ min symbol item pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 17/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 3-4. signal timing waveforms dclk hsync, vsync, de, data t clk 0.5vdd valid invalid invalid de(data enable) 0.7vdd 0.3vdd data data are latched at the falling edge of dclk hsync de(data enable) de(data enable) t wh t hp t hfp t hbp t vp t wv t vbp t vfp t hv t vv vsync pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 18/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 3-5. color data reference table 6. color data reference the brightness of each primary color(red,green,blue) is based onthe 8-bit gray scale data input for the color; the higher the binary input, the brighter the color. the table below provides a reference for color versus data input. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 green (000) dark green 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 green (001) ... ... ... ... 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 green (254) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 green (255) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 red (000) dark red 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 red (001) ... ... ... ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 red (254) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 red (255) 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 blue (001) ... ... ... ... 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 blue (254) 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 blue (255) blue (000) dark white yellow magenta cyan blue (255) green (255) red (255) black 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 basic color 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 blue msb lsb green msb lsb red msb lsb b7 b6 b5 b4 b3 b2 b1 b0 g7 g6 g5 g4 g3 g2 g1 g0 r7 r6 r5 r4 r3 r2 r1 r0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 blue color input color data pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 19/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 3-6. power sequence notes : 1. please avoid floating state of interface signal at invalid period. 2. when the interface signal is invalid, be sure to pull down the power supply for lcd v lcd to0v. 3. lamp power must be turn on after power supply forlcd and interface signal are valid. ms 0 < t8 < t2 t8 ms - 500 t7 ms 0 < t9 < t5 t9 ms 50 - 0.01 t2 ms ms - - 500 t3 - - 200 t4 ms 50 - 0.01 t5 ms 10 - 0.5 t1 max typ min units values parameter table 7. power sequence 10% 90% 90% 10% t1 t2 t5 t7 t3 t4 valid data lamp on 0v off off power supply for lcd vcc interface signal v i power for lamp t8 t9 option siganl (odc) pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 20/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 optical characteristics are determined after the unit has been on for approximately 30 minutes in a dark environment at 25 2 c. the values specified are at an approximate distance 50cm fromthe lcd surface at a viewing angle of f and q equal to 0 and aperture 1 degree. fig. 1 presents additional information concerning the measurement equipment and method. fig. 6 optical characteristic measurement equipment and method table 9. optical characteristics (ta=25 c, v lcd =12.0v, f v =60hz dclk=144mhz, ibl= 6 ma) 4. optical specifications 50cm optical stage(x,y) lcd module pritchard 880 or equivalent y axis, down ( f =270 ) y axis, up ( f =90 ) x axis, left ( f =180 ) x axis, right( f =0 ) viewing angle (cr>10) 6 degree 85 70 q r 85 70 q l 75 60 q u 85 70 q d 5 ms 6 - - t gtg_max 5 ms - 2 - t gtg_avr gray to gray 7 2.2 gray scale white blue green red 0.668 gy 0.207 gx 0.068 by 0.144 bx 0.329 wy 0.313 wx decay time rise time 4 ms 8 4 - tr d 0.318 ry typ +0.03 0.661 typ -0.03 rx color coordinates [cie1931] 4 ms 4 1 - tr r response time 3 % 75 d white luminance variation 2 cd/m 2 400 320 l wh surface luminance, white 1 notes units 1000 700 cr contrast ratio max typ min values symbol parameter pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 21/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 notes 1. contrast ratio(cr) is defined mathematically as : surface luminance with all white pixels contrast ratio = surface luminance with all black pixels 2. surface luminance is luminance value at no.1 point across the lcd surface 50cm from the surface with all pixels displaying white. for more information see fig 6. 3. the variation in surface luminance , d white is defined as : measuring point for surface luminance & measuring point for luminance variation (%) 100 ) l .... , l , (l maximum ) l .. , l , minimum(l on9 on2 on1 on9 on2 on1 ? = white d 1 h a b v active area a : h/4 mm b : v/4 mm @ h,v : active area h/10 v/10 2 3 4 7 8 9 5 6 [ figure 7 ] measure point for luminance pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 22/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 4. the response time is defined as the following figure and shall be measured by switching the input signal for black and white . response time is the time required for the display to transitionfrom white to black (rise time, t rr) and from black to white (decay time, t rd ). 100 90 10 0 % optical response white black white tr r tr d [ figure 8] response time rising time g0 g63 g127 g191 g255 falling time g0 g63 g127 g191 g255 gray to gray 5, the gray to gray response time is defined as the following figure and shall be measured by switching the input signal for gray to gray . -gray step : 5 step -t gtg_avr is the total average time at rising time and falling time for gray to gray . -t gtg_max is the max time at rising time or falling time for gray to gray . table 10. gray to gray response time table pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 23/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 6. viewing angle is the angle at which the contrast ratio is greater than 10 or 5. the angles are determined for the horizontal or x axis and the vertical or y axis with respect to the z axis which is normal to the lcd surface. for more information see fig. 9 . product specification 24/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 5. mechanical characteristics the contents provide general mechanical characteristics. in addition the figures in the next page are detailed mechanical drawing of the lcd. notes : please refer to a mechanic drawing in terms of toleranceat the next page. 336.31mm vertical hard coating(3h) anti-glare treatment of the front polarizer surface treatment typ: 4220 g , max : 4430 g weight 340.4mm vertical 368.2mm vertical 37.2mm depth 597.89mm horizontal active display area 602mm horizontal bezel area 630mm horizontal outline dimension pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 25/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 product specification 26/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 product specification 27/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 6. reliability environment test condition max 70%rh , ta=40 maximum storage humidity for 4 corner light leakage mura. 9 0 -40,000 feet(12192m) altitude storage / shipment 8 ta= 40 c ,90%rh humidity condition operation 7 shock level : 100g waveform : half sine wave, 2ms direction : x, y, z one time each direction shock test (non-operating) 6 wave form : random vibration level : 1.0grms bandwidth : 10-300hz duration : x,y,z, 10min one time each direction vibration test (non-operating) 5 ta= 0 c 240h low temperature operation test 4 ta= 50 c 50%rh 240h high temperature operation test 3 ta= -20 c 240h low temperature storage test 2 ta= 60 c 240h high temperature storage test 1 condition test item no pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 28/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 7. international standards 7-1. safety a) ul 60950-1:2003, first edition, underwriters laboratories, inc., standard for safety of information technology equipment. b) can/csa c22.2, no. 60950-1-03 1 st ed. april 1, 2003, canadian standards association, standard for safety of information technology equipment. c) en 60950-1:2001, first edition, european committee for electro technical standardization(cenelec) european standard for safety of information technology equipment. 7-2. emc a) ansi c63.4 methods of measurement of radio-noise emissions from low-voltage electrical and electrical equipment in the range of 9khz to 40ghz. american national standards institute(ansi), 1992 b) c.i.s.p.r. limits and methods of measurement of radio interface characteristics of information technology equipment. international special committee on radio interference. c) en 55022 limits and methods of measurement of radio interface characteristics of information technology equipment. european committee for electro technical standardization.(cenelec), 1998 ( including a1: 2000 ) pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 29/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 8-2. packing form a) package quantity in one box : 5ea b) box size : 747x335x466 8. packing 8-1. designation of lot mark a) lot mark a b c d e f g h i j k l m a,b,c : size(inch) d : year e : month f ~ m : serial no. note 1. year 2. month mark year 0 2010 6 2006 7 2007 8 2008 9 2009 4 2004 5 2005 3 2 1 2003 2002 2001 b nov mark month a oct 6 jun 7 jul 8 aug 9 sep 4 apr 5 may c 3 2 1 dec mar feb jan b) location of lot mark serial no. is printed on the label. the label is attached to thebackside of the lcd module. this is subject to change without prior notice. pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 30/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 9. precautions please pay attention to the followings when you use this tft lcdmodule. 9-1. mounting precautions (1) you must mount a module using holes arranged in four cornersor four sides. (2) you should consider the mounting structure so that uneven force (ex. twisted stress) is not applied to the module. and the case on which a module is mounted should have sufficient strength so that external force is not transmitted directly to the module. (3) please attach the surface transparent protective plate to the surface in order to protect the polarizer. transparent protective plate should have sufficient strength in order to the resist external force. (4) you should adopt radiation structure to satisfy the temperature specification. (5) acetic acid type and chlorine type materials for the cover case are not desirable because the former generates corrosive gas of attacking the polarizer at high temperature and the latter causes circuit break by electro-chemical reaction. (6) do not touch, push or rub the exposed polarizerswith glass, tweezers or anything harder than hb pencil lead. and please do not rub with dust clothes with chemical treatment. do not touch the surface of polarizer for bare hand or greasy cloth.(some cosmetics are detrimental to the polarizer.) (7) when the surface becomes dusty, please wipe gently with absorbent cotton or other soft materials like chamois soaks with petroleum benzene. normal-hexane is recommended for cleaning the adhesives used to attach front / rear polarizers. do not use acetone, toluene and alcohol because they cause chemical damage to the polarizer. (8) wipe off saliva or water drops as soon as possible. their long time contact with polarizer causes deformations and color fading. (9) do not open the case because inside circuits do not have sufficient strength. 9-2. operating precautions (1) the spike noise causes the mis-operation of circuits. it should be lower than following voltage: v= 200mv(over and under shoot voltage) (2) response time depends on the temperature.(in lower temperature, it becomes longer.) (3) brightness depends on the temperature. (in lower temperature, it becomes lower.) and in lower temperature, response time(required time that brightness is stable after turned on) becomes longer. (4) be careful for condensation at sudden temperature change. condensation makes damage to polarizer or electrical contacted parts. and after fading condensation, smearor spot will occur. (5) when fixed patterns are displayed for a long time, remnant image is likely to occur. (6) 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 minimized the interference. (7) please do not give any mechanical and/or acoustical impact to lcm. otherwise, lcm can t be operated its full characteristics perfectly. (8) a screw which is fastened up the steels should be a machine screw. (if not, it causes metallic foreign material and deal lcm afatal blow) (9)please do not set lcd on its edge. pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com product specification 31/ 31 lm270wf1 liquid crystal display ver0.0 july. 2. 2008 since a module is composed of electronic circuits, it is not strong to electrostatic discharge. make certain that treatment persons are connected to ground through wrist band etc. and don t touch interface pin directly. 9-3. electrostatic discharge control strong light exposure causes degradation of polarizer and color filter. 9-4. precautions for strong light exposure when storing modules as spares for a long time, the following precautions are necessary. (1) store them in a dark place. do not expose the module to sunlight or fluorescent light. keep the temperature between 5 c and 35 c at normal humidity. (2) the polarizer surface should not come in contact with any other object. it is recommended that they be stored in the container in which they were shipped. 9-5. storage 9-6. handling precautions for protection film (1) the protection film is attached to the bezel with a small masking tape . when the protection film is peeled off, static electricity is generated between the film and polarizer. this should be peeled off slowly and carefully by people who are electrically grounded and with well ion- blown equipment or in such a condition, etc. (2) when the module with protection film attached is stored for a long time, sometimes there remains a very small amount of glue still on the bezel after the protection film is peeled off. (3) you can remove the glue easily. when the glue remains on thebezel surface or its vestige is recognized, please wipe them off with absorbent cotton waste or other soft material like chamois soaked with normal- hexane. pdf created with pdffactory pro trial version www.pdffactory.com www.speclcd.com www.speclcd.com |
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