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document number: dod-pp-0251 (6th edition) published date: may 2007 cp(n) ? nec lcd technologies, ltd. 2005-2007 all rights reserved. 1 this data sheet is updated document from dod-pp-0124(5). all information is subject to change without notice. please confirm the sales representative before starting to design your system. tft color lcd module NL6448BC20-18D 17cm (6.5 type) vga data sheet dod-pp-0251 (6th edition)
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 2 introduction the copyright to this document belongs to nec lcd technologies, ltd. (hereinafter called "nec"). no part of this document will be used, reproduced or copied without prior written consent of nec. nec does and will not assume any liability for infringement of patents, copyrights or other intellectual property rights of any third party arising out of or in connection with application of the products described herein except for that directly attributable to mech anisms and workmanship thereof. no license, express or implied, is granted under any patent, copyright or other intellectual property right of nec. some electronic parts/components would fail or malfunction at a certain rate. in spite of every effort to enhance reliability of products by nec, the possibility of failures and malfunction might not be avoided entirely. to prevent the risks of damage to death, human bodily injury or other property arising out thereof or in connection therewith, each custom er is required to take sufficient measures in its safety designs and plans including, but not limited to, redundant system, fire-containment and anti-failure. the products are classified into three quality grades: "standard" , "special" , and "specific" of the highest grade of a quality assurance program at the choice of a customer. each quality grade is designed for applications described below. any customer who intends to use a product for application other than that of standard quality grade is required to contact an nec sales representative in advance. the standard quality grade applies to the products developed, designed and manufactured in accordance with the nec standard quality assurance pr ogram, which are designed for such application as any failure or malfunction of the products (sets) or parts/components incorporated therein a customer uses are, directly or indirectly, free of any damage to death, human bodily injury or other property, like general electronic devices. examples: computers, office automation equipment, communications equipment, test and measurement equipment, audio and visual equipment, home el ectronic appliances, m achine tools, personal electronic equipment, industrial robots, etc. the special quality grade applies to the products developed, designed and manufactured in accordance with an nec quality assurance program stricter than the standard one, which are designed for such application as any failure or malfunction of the produc ts (sets) or parts/components incorporated therein a customer uses might directly cause any damage to death, human bodily injury or other property, or such application under more severe condition than that defined in the standard quality grade without such direct damage. examples: control systems for transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster systems, anti-crime sy stems, medical equipment not specifically designed for life support, safety equipment, etc. the specific quality grade applies to the products developed, designed and manufactured in accordance with the standards or quality assurance program designated by a customer who requires an extremely higher level of reliability and quality for such products. examples: military systems, aircraft control equipment, aerospace equipment, nuclear reactor control systems, medical equipment/devices /systems for life support, etc. the quality grade of this product is the "standard" unless otherwise specified in this document.
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 3 contents introduction ................................................................................................................... ..................... 2 1. outline..................................................................................................................... ............................. 4 1.1 structure and principle .................................................................................................... .... 4 1.2 applic ation ................................................................................................................ .................... 4 1.3 feat ures ................................................................................................................... ....................... 4 2. general sp ecificat ions...................................................................................................... ........ 5 3. block diag ram ............................................................................................................... .................. 6 4. detailed sp ecificat ions..................................................................................................... ........ 7 4.1 mechanical spe cifications .................................................................................................. . 7 4.2 absolute m aximum ra tings.................................................................................................. 7 4.3 electrical c haracteristics................................................................................................. 8 4.3.1 lcd panel signal processing board ........................................................................................ ..... 8 4.3.2 backlight lamp........................................................................................................... .................. 9 4.3.3 power supply voltage ripple.............................................................................................. ......... 10 4.3.4 fuse..................................................................................................................... ....................... 10 4.4 power supply vo ltage sequence ..................................................................................... 11 4.4.1 lcd panel signal processing board ........................................................................................ ... 11 4.4.2 inverter................................................................................................................. ...................... 11 4.5 connections and functi ons for inter face pins ...................................................... 12 4.5.1 lcd panel signal processing board ........................................................................................ ... 12 4.5.2 backlight lamp........................................................................................................... ................ 13 4.5.3 positions of plugs and a socket .......................................................................................... ........ 13 4.6 display colors and input data signals....................................................................... 14 4.7 display positi ons .......................................................................................................... ............ 15 4.8 scanning di rections ........................................................................................................ ....... 15 4.9 input si gnal ti mings ....................................................................................................... ........ 16 4.9.1 outline of in put signal timings .......................................................................................... ........ 16 4.9.2 timing characteristics................................................................................................... ............. 17 4.9.3 input signal timing chart ................................................................................................ ............ 19 4.10 optics.................................................................................................................... ......................... 22 4.10.1 optical characteristics................................................................................................. ............. 22 4.10.2 definition of contrast ratio............................................................................................ ........... 23 4.10.3 definition of luminance uniformity ...................................................................................... ... 23 4.10.4 definition of response times ............................................................................................ ........ 23 4.10.5 definition of viewing angles............................................................................................ ........ 23 5. reliability tests ........................................................................................................... ............... 24 6. pre cautio ns ................................................................................................................. .................... 25 6.1 meaning of c aution signs ................................................................................................... . 25 6.2 caut ions ................................................................................................................... ..................... 25 6.3 atten tions................................................................................................................. ................... 25 6.3.1 handling of the product .................................................................................................. ........... 25 6.3.2 environment.............................................................................................................. ................. 26 6.3.3 characteristics.......................................................................................................... .................. 26 6.3.4 other .................................................................................................................... ...................... 27 7. outline drawin gs............................................................................................................ ............. 28 7.1 front view................................................................................................................. ................... 28 7.2 rear view .................................................................................................................. .................... 29
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 4 1. outline 1.1 structure and principle color lcd module NL6448BC20-18D is composed of the amorphous silicon thin film transistor liquid crystal display (a-si tft lcd) panel structure with driver lsis for driving the tft (thin film transistor) array and a backlight. the a-si tft lcd panel structure is injected liqu id crystal material into a narrow gap between the tft array glass substrate and a color-filter glass substrate. color (red, green, blue) data signals from a host system (e.g. signal generator, etc.) are modulated into best form for active matrix system by a signal pr ocessing board, and sent to the driver lsis which drive the individual tft arrays. the tft array as an electro-optical switch regulates the amount of transmitted light from the backlight assembly, when it is controlled by data signals. color images are created by regulating the amount of transmitted light through the tft array of red, green and blue dots. 1.2 application ? for industrial use 1.3 features ? high luminance ? high contrast ? wide viewing angle ? wide temperature range ? 6-bit digital rgb signals ? reversible-scan direction ? edge light type (without inverter) ? replaceable lamp for backlight ? acquisition product for ul60950-1/csa c22.2 no.60950-1-03 (file number: e170632) ? compliance with the european rohs directive (2002/95/ec)
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 5 2. general specifications display area 132.48 (h) 99.36 (v) mm diagonal size of display 17cm (6.5inches) drive system a-si tft active matrix display color 262,144 colors pixel 640 (h) 480 (v) pixels pixel arrangement rgb (red dot, green dot, blue dot) vertical stripe dot pitch 0.0690 (h) 0.2070 (v) mm pixel pitch 0.2070 (h) 0.2070 (v) mm module size 153.0 (w) 118.0 (h) 10.5 (d) mm (typ.) weight 205g (typ.) contrast ratio 600:1 (typ.) viewing angle at the contrast ratio 10:1 ? horizontal: right side 80 (typ.), left side 80 (typ.) ? vertical: up side 80 (typ.), down side 60 (typ.) designed viewing direction at dps= low or open: normal scan ? viewing direction without image reversal: up side (12 o'clock) ? viewing direction with contrast peak: down side (6 o'clock) ? viewing angle with optimum grayscale ( =2.2): normal axis (perpendicular) polarizer surface antiglare polarizer pencil-hardness 2h (min.) [by jis k5400] color gamut at lcd panel center 40% (typ.) [against ntsc color space] response time ton+toff (10% 90%) 25ms (typ.) luminance at ibl= 5.0marms / lamp 400cd/m 2 (typ.) signal system 6-bit digital signals for data of rgb colors, dot clock (clk), data enable (de), horizontal synchronous signal (hsync), vertical synchronous signal (vsync) power supply voltage lcd panel signal processing board: 3.3v or 5.0v backlight edge light type: 2 cold cathode fluorescent lamps replaceable part ? lamp holder set: type no. 65lhs10 recommended inverter (option) ? inverter: type no. 65pw061 power consumption at ibl= 5.0marms / lamp, checkered flag pattern 4.4w (typ., power dissipation of the inverter is not included.)
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 6 3. block diagram note1: relations between gnd (signal ground), fg (frame ground) and vblc (lamp low voltage terminal) in the lcd module are as follows. gnd - fg connected gnd - vblc not connected fg - vblc not connected note2: gnd, fg and gndb must be connected to customer e quipment?s ground, and it is recommended that these grounds are connect ed together in customer equipment. note2 note1 note2 host v-driver 1,920 lines lcd panel h: 640 3 (r, g, b) v: 480 480 lines vcc clk b0 to b5 g0 to g5 r0 to r5 dps de vsync hsync gnd 100 100 100 100 100 100 1 00 47k lcd module (product) lcd panel signal processing board power supply for gradation dc/dc converter fuse controller h-driver inverter (option) vblh vblh gndb vblc note1 backlight (edge light type) lamp lam p fg vddb 47 k note1 note2
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 7 4. detailed specifications 4.1 mechanical specifications parameter specification unit module size 153.0 0.5 (w) 118.0 0.5 (h) 10.5 0.5 (d) note1 mm display area 132.48 (h) 99.36 (v) note1 mm weight 205 (typ.), 215 (max.) g note1: see " 7. outline drawings ". 4.2 absolute maximum ratings parameter symbol rating unit remarks lcd panel signal processing board vcc -0.3 to +6.5 v power supply voltage lamp voltage vblh 1,700 vrms display signals note1 vd input voltage for signals function signal note2 vf -0.3 to vcc+0.3 v ta= 25 c storage temperature tst -20 to +80 c - front surface topf -10 to +70 c note3 operating temperature rear surface topr -10 to +70 c note4 95 % ta 40 c relative humidity note5 rh 85 % 40 50 c note1: clk, hsync, vsync, de, data (r0 to r5, g0 to g5, b0 to b5) note2: dps note3: measured at center of lc d panel surface (including self-heat) note4: measured at center of lcd module's rear shield surface (including self-heat) note5: no condensation note6: water amount at ta= 50c and rh= 85%
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 8 4.3 electrical characteristics 4.3.1 lcd panel signal processing board (ta= 25 c) parameter symbol min. typ. max. unit remarks 3.0 3.3 3.6 v at vcc= 3.3v power supply voltage vcc 4.75 5.0 5.25 v at vcc= 5.0v - 210 note1 330 note2 ma at vcc= 3.3v power supply current icc - 165 note1 255 note2 ma at vcc= 5.0v high vdh 0.7vcc - vcc v logic input voltage for display signals low vdl 0 - 0.3vcc v high vfh 0.7vcc - vcc v input voltage for dps signal low vfl 0 - 0.3vcc v cmos level note1: checkered flag pattern [by eiaj ed-2522] note2: pattern fo r maximum current
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 9 4.3.2 backlight lamp (ta= 25 c, note1) parameter symbol min. typ. max. unit remarks lamp current note3, note4 ibl 2.0 5.0 5.5 marms at ibl=5.0marms: l= 400cd/m 2 lamp voltage note2, note3 vblh - 360 - vrms - 870 - - vrms ta= 25 c lamp starting voltage note2, note3, note5, note8 vs 960 - - vrms ta= -10 c lamp oscillation frequency note6 fo 50 55 60 khz - note1: this product consists of 2 backlight la mps, and these specifications are for each lamp. note2: the lamp voltage cycle between lamps should be kept on a same phase. "vs" and "vblh" are the voltage value between low voltage si de (cold) and high voltage side (hot). note3: the asymmetric ratio of working waveform for lamps (power supply voltage peak ratio, power supply current peak ratio and waveform space ratio) should be less than 5 % (see the following figure.). if the wavefo rm is asymmetric, dc (direct current) element apply into the lamp. in this case, a lamp lifetime may be shortened, because a distribution of a lamp enclosure substance inclines toward one side between low voltage terminal (cold terminal) and high voltage terminal (hot terminal). when designing the inverter, evaluate asymmetric of lamp working waveform sufficiently. pa: supply voltage/current peak for positive, pb: supply voltage/current peak for negative sa: waveform space for positive part, sb: waveform space for negative part. note4: this product consists of 2 lamps. 2 lamps are contained in the 1 lamp holder, and both lamps are connected to 1 low voltage cable. recommended lamp current is 5.0marms typical for each lamp, and sum of 2 lamps is 10marms typical . the lamp current should be measured by high-frequency current meter at the low voltage terminal. note5: the inverter should be designed so that the lamp starting voltage can be maintained for more than 1 second. otherwise the lamp may not be turned on. note6: in case "fo" is not the recommended value, beat noise may display on the screen, because of interference between "fo" and "1/th". recommended value of "fo" is as following th: horizontal cycle (see " 4.9.2 timing characteristics ".) n: natural number (1, 2, 3 ???????? ) note7: method of lamp cable installation may invite fluctuation of lamp current and voltage or asymmetric of lamp working waveform. when designing method of lamp cable installation, evaluate the fluctuation of lamp current, voltage and working waveform sufficiently. pa pb sa sb 0 | pa - pb | pb 100 5% 100 5% | sa - sb | sb fo = 1 4 1 th (2n-1)
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 10 note8: in case of inverter with ballast conden ser, "vs" is the voltage level between ballast condenser and connector (refer to the below ?e xample of measurement?). "vs" should be designed to be more than minimum "vs". otherwise the lamp may not be turned on because the lamp starting voltage is less than minimum "vs". example of measurement probe capacity: 3pf (tektronix, inc.: p6015a) 4.3.3 power supply voltage ripple this product works, even if the ripple voltage levels are beyond the permissible values as following the table, but there might be noise on the display image. power supply voltage ripple voltage note1 (measure at input terminal of power supply) unit 3.3v 100 mvp-p vcc 5.0v 100 mvp-p note1: the permissible ripple voltage includes spike noise. 4.3.4 fuse fuse parameter type supplier rating fusing current remarks 2.0a vcc fcc16202ab kamaya electric co., ltd 32v 4.0a note1 note1: the power supply capacity should be more than the fusing current. if it is less than the fusing current, the fuse may not blow in a short time, and then nasty smell, smoke and so on may occur. transformer high voltage probe probe capacity inverter ballast condenser connector (lamp side)
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 11 4.4 power supply voltage sequence 4.4.1 lcd panel signal processing board note1: in terms of voltage variation (voltage drop) while vcc rising edge is below 3.0v in "vcc = 3.3v" or 4.75v in "vcc = 5.0v", a protection circuit may work, and then this product may not work. note2: display signals (clk, hsync, vsync, de , data (r0 to r5, g0 to g5, b0 to b5)) and function signal (dps) must be low or high-impedance, exclude the valid period (see above sequence diagram), in order to avoid that internal circuits is damaged. if some of display and function signals of this product are cut while this product is working, even if the signal input to it once again, it might not work normally. vcc should be cut when the display and function signals are stopped. 4.4.2 inverter (option) note1: these are the display and function signals for lcd panel signal processing board. note2: the backlight should be turned on within the valid period of display and function signals, in order to avoid unstable data display. display signals function signals note1 vddb valid period note2 0ms < t < 35ms 0ms < t < 35ms tr < 30ms valid period off on 3.0v or 4.75v 0v vcc note1 display signals function signal note2 toff > 50ms 0v on
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 12 4.5 connections and functions for interface pins 4.5.1 lcd panel signal processing board cn1 socket (lcd module side): df9b-31p-1v (3 ? ) (hirose electric co., ltd. (hrs)) adaptable plug: df9-31s-1v (2 ? ), df9-31s-1v (3 ? ) (hirose electric co., ltd. (hrs)) pin no. symbol signal remarks 1 gnd ground note1 2 clk dot clock 3 hsync horizontal synchronous signal 4 vsync vertical synchronous signal - 5 gnd ground note1 6 r0 red data (lsb) least significant bit 7 r1 red data 8 r2 red data 9 r3 red data 10 r4 red data - 11 r5 red data (msb) most significant bit 12 gnd ground note1 13 g0 green data (lsb) least significant bit 14 g1 green data 15 g2 green data 16 g3 green data 17 g4 green data - 18 g5 green data (msb) most significant bit 19 gnd ground note1 20 b0 blue data (lsb) least significant bit 21 b1 blue data 22 b2 blue data 23 b3 blue data 24 b4 blue data - 25 b5 blue data (msb) most significant bit 26 gnd ground note1 27 de selection of de / fixed mode high or open: fixed mode data enable signal: de mode 28 vcc power supply 29 vcc power supply note1 30 n.c. - keep this pin open. 31 dps selection of scan direction high: reverse scan low or open: normal scan note2 note1: all gnd and vcc terminals should be used without any non-connected lines. note2: see " 4.8 scanning directions ".
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 13 4.5.2 backlight lamp attention: vblh and vblc must be connect ed correctly. wrong co nnections will cause electric shock and also br eak down of the product. cn2 plug (lcd module side): bhr-04vs-1 (j.s.t mfg. co., ltd.) adaptable socket: sm03 (7-d1) b-bhs-1-tb (lf)(sn), sm03 (7-d1) b-bhs-1-tb (j.s.t mfg. co., ltd.) pin no. symbol signal remarks 1 vblh high voltage (hot) cable color: pink 2 vblh high voltage (hot) cable color: pink 3 n. c. - keep this pin open. 4 vblc low voltage (cold) cable color: black 4.5.3 positions of plugs and a socket cn2 low voltage (cold) high voltage (hot) 4 2 1 rear side cn1 1 31 2 30 3 barcode label name plate high voltage caution marking disposal method marking for lamp
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 14 4.6 display colors and input data signals this product can display in equivalent to 262,144 colors in 64 gray scales. also the relation between display colors and input data signals is as the following table. data signal (0: low level, 1: high level) display colors r5 r4 r3 r2 r1 r0 g5 g4 g3 g2 g1 g0 b5 b4 b3 b2 b1 b0 basic colors black blue red magenta green cyan yellow white 000000 000000 111111 111111 000000 000000 111111 111111 000000 000000 000000 000000 111111 111111 111111 111111 000000 111111 000000 111111 000000 111111 000000 111111 red gray scale black dark bright red 000000 000001 000010 : : 111101 111110 111111 000000 000000 000000 : : 000000 000000 000000 000000 000000 000000 : : 000000 000000 000000 green gray scale black dark bright green 000000 000000 000000 : : 000000 000000 000000 000000 000001 000010 : : 111101 111110 111111 000000 000000 000000 : : 000000 000000 000000 blue gray scale black dark bright blue 000000 000000 000000 : : 000000 000000 000000 000000 000000 000000 : : 000000 000000 000000 000000 000001 000010 : : 111101 111110 111111
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 15 4.7 display positions the following table is the coordinates per pixel (see "4.8 scanning directions" .). c (0, 0) r g b c( 0, 0) c( 1, 0) ? ? ? c( x, 0) ? ? ? c(638, 0) c(639, 0) c( 0, 1) c( 1, 1) ? ? ? c( x, 1) ? ? ? c(638, 1) c(639, 1) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? c( 0, y) c( 1, y) ? ? ? c( x, y) ? ? ? c(638, y) c(639, y) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? c( 0, 478) c( 1, 478) ? ? ? c( x, 478) ? ? ? c(638, 478) c(639, 478) c( 0, 479) c( 1, 479) ? ? ? c( x, 479) ? ? ? c(638, 479) c(639, 479) 4.8 scanning directions the following figures are seen from a front view . also the arrow shows the direction of scan. note1: meaning of c (x, y) and d (x, y) c (x, y): the coordinates of the display position (see " 4.7 display positions ".) d (x, y): the data number of input signal for lcd panel signal processing board figure1. normal scan (dps: low or open) c (0, 0) d (0, 0) c (0, 479) d (0, 479) c (639, 479) d (639, 479) c (639, 0) d (639, 0) note1 figure2. reverse scan (dps: high) note1 c (0, 0) d (639, 479) c (0, 479) d (639, 0) c (639, 479) d (0, 0) c (639, 0) d (0, 479)
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 16 4.9 input signal timings 4.9.1 outline of input signal timings ? horizontal signal ? vertical signal note1: this diagram indicates virtual signal for set up to timing. note2: fixed mode cannot be used while working of de mode. note3: see " 4.9.3 input signal timing chart " for numeration of pulse. horizontal front-porch (thf) horizontal synchronizing cycle (th) horizontal synchronizing pulse width (thp) horizontal back-porch (thb) horizontal display period (thd) hsync note2 display period de (data enable) note1 vertical front-porch (tvf) vertical synchronizing cycle (tv) vertical synchronizing pulse width (tvp) vertical back-porch (tvb) vertical display period (tvd) display period de (data enable) vsync note2 1 2 3 4 480 note3 note1
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 17 4.9.2 timing characteristics (a) fixed mode (note1) parameter symbol min. typ. max. unit remarks frequency 1/tc 21.0 25.175 29.0 mhz 39.72ns (typ.) duty tcd 0.4 0.5 0.6 - clk rise time, fall t ime tcrf - - 10 ns - setup time tds 3 - - ns clk-data hold time tdh 5 - - ns data (r0-r5) (g0-g5) (b0-b5) rise time, fall time tdrf - - 10 ns - 30.0 31.778 33.6 s 31.468khz (typ.) cycle th 800 clk display period thd 640 clk front-porch thf 16 clk pulse width thp 10 96 - clk back-porch thb - 48 134 clk - total of pulse width and back-porch thp + thb 144 clk note2 setup time ths 3 - - ns clk- hsync hold time thh 5 - - ns hsync rise time, fall time thrf - - 10 ns - 16.1 16.683 17.2 ms 59.94hz (typ.) cycle tv 525 h display period tvd 480 h front-porch tvf 12 h pulse width tvp 1 2 - h back-porch tvb - 31 32 h - total of pulse width and back-porch tvp + tvb 33 h note2 setup time tvhs 3 - - ns hsync-vsync hold time tvhh 5 - - ns vsync rise time, fall time tvrf - - 10 ns - note1: definition of para meters is as follows. tc= 1clk, tcd= tch/tc, th= 1h note2: keep tvp + tvb and thp + thb within the table. if it is out of specification, display position will be shifted to right/left side or up/down.
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 18 (b) de mode (note1, note2, note3) parameter symbol min. typ. max. unit remarks frequency 1/tc 21.0 25.175 29.0 mhz 39.72ns (typ.) duty tcd 0.4 0.5 0.6 - clk rise time, fall t ime tcrf - - 10 ns - setup time tds 3 - - ns clk-data hold time tdh 5 - - ns data (r0-r5) (g0-g5) (b0-b5) rise time, fall time tdrf - - 10 ns - 30.0 31.778 33.6 s 31.468khz (typ.) cycle th - 800 - clk horizontal display period thd 640 clk - 16.1 16.683 17.2 ms 59.94hz (typ.) cycle tv - 525 - h vertical (one frame) display period tvd 480 h setup time tdes 3 - - ns clk-de hold time tdeh 5 - - ns de rise time, fall t ime tderf - - 10 ns - note1: definition of para meters is as follows. tc= 1clk, tcd= tch/tc, th= 1h note2: hsync signal (cn1-pin no.3) and vsync signal (cn1-pin no.4) are not used inside the product at de mode, but do not keep pin open to avoid noise problem. note3: vertical cycle (tv) should be specified in integral multiple of horizontal cycle (th).
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 19 4.9.3 input signal timing chart (a) fixed mode (note: x=0 to 639) 1 clk hsync hsync hsync hsync vsync 2 3 data (r0-r5) (g0-g5) (b0-b5) (note: y = 0 to 479) 2 1 1 d(x,0) d(x,478)d(x,479) d(x,y) invalid invalid 1 d(0,y)d(1,y) d(x,y) d(638,y)d(639,y) invalid invalid d(0,y)d(1,y) d(639,y) invalid invalid 1clk 144clk (fixed) 640clk (fixed) thp thb thd thf 16clk (fixed) 33h (fixed) 480h (fixed) 1h tvp tvb tvd tvf 12h (fixed) data (r0-r5) (g0-g5) (b0-b5) data (r0-r5) (g0-g5) (b0-b5)
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 20 (b) de mode horizontal timing vertical timing invalid 1 2 639 640 clk de data (r0-r5) (g0-g5) (b0-b5) invalid thd th de data (r0-r5) (g0-g5) (b0-b5) invalid invalid 1 2 479 480 tvd tv tc
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 21 (c) common item of fixed mode and de mode tdrf 0.7vcc 0.3vcc thh hsync ths clk hsync vsync tvhh tvhs tch invalid clk data (r0-r5) (g0-g5) (b0-b5) tds tdh invalid tdes tdeh de tc 0.7vcc 0.3vcc 0.7vcc 0.3vcc 0.7vcc 0.3vcc 0.7vcc 0.3vcc 0.7vcc 0.3vcc 0.7vcc 0.3vcc tdrf tderf tderf thrf thrf tvrf tvrf tcrf tcrf
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 22 4.10 optics 4.10.1 optical characteristics (note1, note2) parameter condition symbol min. typ. max. unit remarks luminance white at center r= 0 , l= 0 , u= 0 , d= 0 l 280 400 - cd/m 2 - contrast ratio white/black at center r= 0 , l= 0 , u= 0 , d= 0 cr 300 600 - - note3 luminance uniformity white r= 0 , l= 0 , u= 0 , d= 0 lu - 1.25 1.4 - note4 x coordinate wx 0.283 0.313 0.343 - white y coordinate wy 0.299 0.329 0.359 - x coordinate rx - 0.582 - - red y coordinate ry - 0.344 - - x coordinate gx - 0.328 - - green y coordinate gy - 0.528 - - x coordinate bx - 0.156 - - chromaticity blue y coordinate by - 0.146 - - color gamut r= 0 , l= 0 , u= 0 , d= 0 at center, against ntsc color space c 35 40 - % note5 white to black ton - 6 15 ms response time black to white toff - 19 47 ms note6 note7 right u= 0 , d= 0 , cr 10 r 70 80 - left u= 0 , d= 0 , cr 10 l 70 80 - up r= 0 , l= 0 , cr 10 u 70 80 - viewing angle down r= 0 , l= 0 , cr 10 d 50 60 - note8 note1: these are initial characteristics. note2: measurement conditions are as follows. ta= 25 c, vcc= 3.3v, ibl= 5.0marms/lamp, display mode: vga, horizontal cycle= 1/31.468khz, vertical cycle= 1/59.94h z, dps= low or open: normal scan optical characteristics are measured at lumi nance saturation after 20minutes from working the product, in the dark room. also measurement methods are as follows. note3: see " 4.10.2 definition of contrast ratio ". note4: see " 4.10.3 definition of luminance uniformity ". note5: these coordinates are found on cie 1931 chromaticity diagram. note6: product surface temperature: topf= 32 c note7: see " 4.10.4 definition of response times ". note8: see " 4.10.5 definition of viewing angles ". photodetector (bm-5a) 50cm 1 r lcd module (product)
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 23 4.10.2 definition of contrast ratio the contrast ratio is calculated by using the following formula. luminance of white screen luminance of black screen 4.10.3 definition of luminance uniformity the luminance uniformity is calculated by using following formula. maximum luminance from to minimum luminance from to the luminance is measured at n ear the 5 points shown below. 4.10.4 definition of response times response time is measured, the luminance changes from "white" to "black", or "black" to "white" on the same screen point, by photo-detector. ton is the time it takes the luminance change from 90% down to 10%. also toff is the time it takes the luminance change from 10% up to 90% (see the following diagram.). 4.10.5 definition of viewing angles luminance uniformity (lu) = contrast ratio (cr) = 106 320 533 80 240 400 100% 90% 10% 0% ton toff luminance white black left upper lower n ormal axis (perpendicular) t u t d t r t l 12 o?clock right
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 24 5. reliability tests test item condition judgment high temperature and humidity (operation) 60 r 2 q c, rh= 90%, 240hours display data is black. high temperature (operation) 70 r 3 q c, 240hours display data is black. heat cycle (operation) -10 r 3 q c } 1hour 70 r 3 q c } 1hour 50cycles, 4 hours/cycle display data is black. thermal shock (non operation) -20 r 3 q c } 30minutes 80 r 3 q c } 30minutes 100cycles, 1hour/cycle temperature transition time is within 5 minutes. esd (operation) 150pf, 150 : , r 10kv 9 places on a panel surface note2 10 times each places at 1 sec interval dust (operation) sample dust: no. 15 (by jis-z8901)) 15 seconds stir 8 times repeat at 1 hour interval no display malfunctions note1 vibration (non operation) 5 to 100hz, 19.6m/s 2 1 minute/cycle x, y, z direction 120 times each directions mechanical shock (non operation) 539m/ s 2 , 11ms x, r y, r z direction 5 times each directions no display malfunctions no physical damages note1 note1: display and appearance are checked under environmental conditions equivalent to the inspection conditions of defect criteria. note2: see the following fi gure for discharge points. { { { { { { { { {
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 25 6. precautions 6.1 meaning of caution signs the following caution signs have very important meaning. be sure to read "6.2 cautions" and "6.3 attentions", after understanding these contents! ! this sign has the meaning that customer will be injured by himself or the product will sustain a damage, if customer has wrong operations. this sign has the meaning that customer will get an electrical shock, if customer has wrong operations. this sign has the meaning that customer will be injured by himself, if customer has wrong operations. 6.2 cautions ? do not touch the working backlight. there is a danger of an electric shock. ? do not touch the working backlight . there is a danger of burn injury. ? do not shock and press the l cd panel and the backlight! ther e is a danger of breaking, because they are made of glass. (shock: to be not greater 539m/s 2 and to be not greater 11ms, pressure: to be not greater 19.6n ( 16mm jig)) 6.3 attentions 6.3.1 handling of the product p take hold of both ends without touching the circuit board when the product (lcd module) is picked up from inner packing box to avoid broken down or misadjustment, because of stress to mounting parts on the circuit board. q do not hook nor pull cables such as lamp cable, and so on, in order to avoid any damage. r when the product is put on the table temporar ily, display surface must be placed downward. s when handling the product, take the measures of electrostatic discharge with such as earth band, ionic shower and so on, because the product may be damaged by electrostatic. t the torque for product mounting screws must never exceed 0.147n ? m. higher torque might result in distortion of the bezel. and the length of product mounting screws must be 2.0mm. u the product must be installed using mounting holes without undue stress such as bends or twist (see outline drawings). and do not add undue stress to any portion (such as bezel flat area). bends or twist described above and undue stress to any portion may cause display mura. v do not press or rub on the sensitive product su rface. when cleaning the pr oduct surface, use of the cloth with ethanolic liquid such as screen cleaner for lcd is recommended. !
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 26 do not push nor pull the interface connec tors while the product is working. do not bend or unbend the lamp cable at the near part of the lamp holding rubber, to avoid the damage for high voltage side of the lamp. properly connect the plug (backlight side) to ad aptable socket (inverter side) without incomplete connection. after connecting, be careful not to hook the lamp cables because incomplete connection may occur by hooking the lamp cables. this incomplete connection may cause abnormal operation of high voltage circuit. ? if the lamp cable is attached on the metal part of the product directly, high frequency leak current to the metal part may occur, then the brightness may decrease or the lamp may not be turned on. ? when handling the product, use of an original pr otection sheet on the product surface (polarizer) is recommended for protection of product surface. adhe sive type protection sheet may change color or characteristics of the polarizer. ? usually liquid crystals don't l eak through the breakage of glasse s because of the surface tension of thin layer and the construction of lcd panel. but, if you contact with liquid crystal for the worst, please wash it out with soap. 6.3.2 environment do not operate or store in high temperature, high humidity, dewdrop atmosphere or corrosive gases. keep the product in packing box with antistatic pouch in room temperature to avoid dusts and sunlight, when storing the product. in order to prevent dew condensation occurring by temperature differen ce, the product packing box should be opened after enough time being left under the environment of an unpacking room. evaluate the leaving time sufficiently because a situation of dew condensation occurring is changed by the environmental temperature and humidity. (recommended leaving time: 6 hours or more with packing state) do not operate in high magnetic field. circuit boards may be broken down by it. this product is not designed as radiation hardened. 6.3.3 characteristics the following items are ne ither defects nor failures. response time, luminance and color may be changed by ambient temperature. display mura, flicker, vertical seam or small spot may be observed depending on display patterns. optical characteristics (e.g. luminance, display uniformity, etc.) gradually is going to change depending on operating time, and especially low temperature, because the lcd has cold cathode fluorescent lamps. do not display the fixed pattern for a long time because it may cause image sticking. use a screen saver, if the fixed pattern is displayed on the screen. the display color may be changed depending on viewing angle because of the use of condenser sheet in the backlight. optical characteristics may be changed depending on input signal timings. the interference noise between input signal frequency for this product's signal processing board and luminance control frequency of the inverter may appear on a display. set up luminance control frequency of the inverter so that the interference noise does not appear. after the product is stored under condition of low temperature or dark place for a long time, the cold cathode fluorescent lamp may not be turned on under the same condition because of the general characteristic of cold cathode fluorescen t lamp. in addition, when luminance control ratio is low in pulse width modulation method inverter, the lamp may not be turned on. in this case, power should be supplied again.
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 27 6.3.4 other all gnd and vcc terminals should be used without any non- connected lines. do not disassemble a product or adjust variable resistors. see "replacement manual for lamp holder set", when replacing backlight lamps. pay attention not to insert foreign materials inside of the product, when using tapping screws. pack the product with original shipping package, in order to avoid any damages during transportation, when returning the product to nec for repair and so on.
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 28 7. outline drawings 7.1 front view unit: mm note1: the values in pare ntheses are for reference. note2: the torque for product mounting screws must never exceed 0.147n ? m. and the length of mounting screws must be 2.0mm.
NL6448BC20-18D data sheet dod-pp-0251 (6th edition) 29 7.2 rear view unit: mm note1: the values in pare ntheses are for reference. note2: the torque for product mounting screws must never exceed 0.147n ? m. and the length of mounting screws must be 2.0mm.

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