url: www.topwaydisplay.com www.topwaysz.com document name: LM320240BFW-manual-rev0.2.doc page: 1 of 9 LM320240BFW lcd module user manual shenzhen topway technology co., ltd. rev. descriptions release date 0.1 preliminary new release 2007-12-15 0.2 update backlight driving voltage 2008-02-28
topway lcd module user manual LM320240BFW url: www.topwaydisplay.com www.topwaysz.com document name: LM320240BFW-manual-rev0.2.doc page: 2 of 9 table of content 1. basic specifications........................................................................................................... ..... 3 1.1 display spec ificat ions ......................................................................................................... ................................... 3 1.2 mechanical sp ecificat ions...................................................................................................... ................................ 3 1.3 block di agram .................................................................................................................. ...................................... 3 1.4 terminal f uncti ons............................................................................................................. .................................... 4 2. absolute maximum ratings.................................................................................................... 5 3. electrical characteristics..................................................................................................... ... 5 3.1 dc characte ristics ............................................................................................................. .................................... 5 3.2 led backlight circuit characte ristics.......................................................................................... ........................... 5 3.3 ac characte ristics ............................................................................................................. .................................... 6 4. function specifications ........................................................................................................ .. 7 4.1 adjusting the di splay c ontrast ................................................................................................. .............................. 7 4.2 display pi xel map.............................................................................................................. ..................................... 7 4.3 signal se quence ................................................................................................................ .................................... 8 5. design and handling precaution ........................................................................................... 9
topway lcd module user manual LM320240BFW url: www.topwaydisplay.com www.topwaysz.com document name: LM320240BFW-manual-rev0.2.doc page: 3 of 9 1. basic specifications 1.1 display specifications 1) lcd display mode : stn, negative, transmissive 2) display color : display data = ?1? : light gray (*1) : display data = ?0? : dark blue (*2) 3) viewing angle : 6 h 4) driving method : 1/240 duty, 1/14 bias 5) backlight : white led backlight note: *1. color tone may slightly change by temperature and driving condition. *2. the color is defined as the inactive / background color 1.2 mechanical specifications 1) outline dimension : 139.0 x 100.0 x 7.4 max. see attached outline drawing for details 1.3 block diagram vout, v0 320 x 240 pixels lcd panel seg driver /dispoff xd0~xd3 m cp lp seg1 : seg160 seg driver com driver seg161 : seg320 com1 : com240 power circuit flm vdd,vss bla, blk backli g ht circuit
topway lcd module user manual LM320240BFW url: www.topwaydisplay.com www.topwaysz.com document name: LM320240BFW-manual-rev0.2.doc page: 4 of 9 1.4 terminal functions pin no. pin name i/o descriptions 1 flm input first line marker 2 lp input line pulse signal, for latching the segment buffer to the segment driver 3 cp input clock pulse signal, for shifting the data (d0~d3) into the segment buffer 4 m input controlling signal for the lcd ac driving 5 v0 input lcd contrast reference input 6 vdd power positive power supply 7 vss power 0v power supply, gnd 8 vout output dc/dc power output for v0 9 xd0 input display data 10 xd1 input display data 11 xd2 input display data 12 xd3 input display data 13 /dispoff input display on/off control signal, /dispoff = 0, display off /dispoff = 1, display on 14 nc - no connection (leave open) 15 bla power positive power supply for led backlight 16 blk power negative power supply for led backlight
topway lcd module user manual LM320240BFW url: www.topwaydisplay.com www.topwaysz.com document name: LM320240BFW-manual-rev0.2.doc page: 5 of 9 2. absolute maximum ratings items symbol min. max. unit condition supply voltage v dd -0.3 +6.0 v v ss = 0v input voltage v in v ss -0.3 v dd +0.3 v v ss = 0v operating temperature t op -20 70 c no condensation storage temperature t st -30 80 c no condensation cautions: any stresses exceeding the absolute maximum ratings may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specification is not im plied and prolonged exposure to extreme conditions may affect device reliability. 3. electrical characteristics 3.1 dc characteristics v ss =0v, v dd =3.3v, t op =25 c items symbol min. typ. max. unit applicable pin operating voltage v dd 3.0 3.3 5.3 v vdd lcd driver supply v ee - 25.0 - v vout lcd contrast reference voltage (*1) v 0 - 21.0 - v v0 frame freq. f frame 60 66 80 hz input high voltage v in 0.8xvdd - vdd v xd0~xd3, cp, lp, flm, m, /dispoff input low voltage v in 0 - 0.2x vdd v xd0~xd3, cp, lp, flm, m, /dispoff operating current i dd - 49 190 ma vdd note: *1. frame freq. at 66hz 3.2 led backlight circuit characteristics blk=0v, if bla =170ma, t op =25 c items symbol min. typ. max. unit applicable pin forward voltage vf bla - 3.3 - v bla forward current if bla - 170 200 ma bla cautions: exceeding the recommended driving current could cause substantial damage to t he backlight and shorten its lifetime. bl k bla no. of led = 10pcs
topway lcd module user manual LM320240BFW url: www.topwaydisplay.com www.topwaysz.com document name: LM320240BFW-manual-rev0.2.doc page: 6 of 9 3.3 ac characteristics v ss =0v, t op =25 c v dd =5.0v v dd =3.3v item symbol min. max. min. max. unit shift clock period (*1) twck 90 - 160 - ns shift clock ?h? pulse width twckh 30 - 64 - ns shift clock ?l? pulse width twckl 30 - 64 - ns seg data set-up time tds 13 - 38 - ns seg data hold time tdh 13 - 50 - ns latch pulse ?h? pulse width twlph 30 - 64 - ns shift clock rise to latch pulse rise time tld 9 - 9 - ns shift clock fall to latch pulse fall time tsl 32 - 64 - ns latch pulse rise to shift clock rise time tls 32 - 64 - ns latch pulse fall to shift clock fall time tlh 32 - 64 - ns rise time tr - 40 - 40 ns fall time tf - 40 - 40 ns /dispoff removal time tsd 125 - 125 - ns /dispoff ?l? pulse width twdl 1500 - 1500 - ns com data setup time tsu 38 - 38 - ns com data hold time th 63 - 63 - ns note: *1. tr, tf < 9ns interface timing digram
topway lcd module user manual LM320240BFW url: www.topwaydisplay.com www.topwaysz.com document name: LM320240BFW-manual-rev0.2.doc page: 7 of 9 4. function specifications 4.1 adjusting the display contrast a variable-resistor must be connected to the lcd module for providing a reference to v0. adjusting the vr will result the change of lcd display contrast. the recommended value of vr is 25k to 50k 4.2 display pixel map 1,1 (d3) 2,1 (d2) 3,1 (d1) 4,1 (d0) 5,1 (d3) - - - - - - 316,1 (d0) 317,1 (d3) 318,1 (d2) 319,1 (d1) 320,1 (d0) 1,2 (d3) 2,2 (d2) 3,2 (d1) 4,2 (d0) 5,2 (d3) - - - - - - 316,2 (d0) 317,2 (d3) 318,2 (d2) 319,2 (d1) 320,2 (d0) 1,3 (d3) 2,3 (d2) 3,3 (d1) 4,3 (d0) 5,3 (d3) - - - - - - 316,3 (d0) 317,3 (d3) 318,3 (d2) 319,3 (d1) 320,3 (d0) : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1,238 (d3) 2,238 (d2) 3,238 (d1) 4,238 (d0) 5,238 (d3) - - - - - - 316,238 (d0) 317,238 (d3) 318,238 (d2) 319,238 (d1) 320,238 (d0) 1,239 (d3) 2,239 (d2) 3,239 (d1) 4,239 (d0) 5,239 (d3) - - - - - - 316,239 (d0) 317,239 (d3) 318,239 (d2) 319,239 (d1) 320,239 (d0) 1,240 (d3) 2,240 (d2) 3,240 (d1) 4,240 (d0) 5,240 (d3) - - - - - - 316,240 (d0) 317,240 (d3) 318,240 (d2) 319,240 (d1) 320,240 (d0) pixel mapping (top view) based on the top view of the lcd module, the 1, 1 (x, y) pixel is the upper-left pixel; the 320, 240 (x, y) pixel is the lower-right pixel. lcd module vout v0 vss vdd power supply vr
topway lcd module user manual LM320240BFW url: www.topwaydisplay.com www.topwaysz.com document name: LM320240BFW-manual-rev0.2.doc page: 8 of 9 4.3 signal sequence in the upper section (expended view), shows the data sequence of lines. in the lower section (compressed view), shows the signal sequence of flm, lp and m in frames.
topway lcd module user manual LM320240BFW url: www.topwaydisplay.com www.topwaysz.com document name: LM320240BFW-manual-rev0.2.doc page: 9 of 9 5. design and handling precaution 1. the lcd panel is made by glass. any mechanical shock (eg. dropping form high place) will damage the lcd module. 2. do not add excessive force on the surface of the display, which may cause the display color change abnormally. 3. the polarizer on the lcd is easily get scratched. if possible, do not remove the lcd protective film until the last step of installation. 4. never attempt to disassemble or rework the lcd module. 5. only clean the lcd with isopropyl alcohol or ethyl alcohol. other solvents (eg. water) may damage the lcd. 6. when mounting the lcd module, make sure that it is free form twisting, warping and distortion. 7. ensure to provide enough space (with cushion) between case and lcd panel to prevent external force adding on it, or it may cause damage to the lcd or degrade the display result. 8. only hold the lcd module by its side. never hold lcd module by add force on the heat seal or tab. 9. never add force to component of the lcd module. it may cause invisible damage or degrade of the reliability. 10. lcd module could be easily damaged by static electricity. be careful to maintain an optimum anti-static work environment to protect the lcd module. 11. when peeling off the protective film from lcd, static charge may cause abnormal display pattern. it is normal and will resume to normal in a short while. 12. take care and prevent get hurt by the lcd panel sharp edge. 13. never operate the lcd module exceed the absolute maximum ratings. 14. keep the signal line as short as possible to prevent noisy signal applying to lcd module. 15. never apply signal to the lcd module without power supply. 16. ic chip (eg. tab or cog) is sensitive to the light. strong lighting environment could possibly cause malfunction. light sealing structure casing is recommend. 17. lcd module reliability may be reduced by temperature shock. 18. when storing the lcd module, avoid exposure to the direct sunlight, high humidity, high temperature or low temperature. they may damage or degrade the lcd module
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