KF2003-GF41A printheads 1/4 compact high speed thick film thermal printhead (8dots / mm) KF2003-GF41A using its expertise in lsi technology, rohm has developed new high density driver chips for use in the KF2003-GF41A . capable of being employed for both thermal and thermal transfer printing, with a print speed of 200mm/s, the resulting printheads are the fastest in their class. the high-speed and high-density printing answers the needs of atm, kiosk and ticket printing devices, which are increasingly being called upon to produce graphical output. ! ! ! ! applications label printers ticket printers pos printers atm printers kiosk printers terminal printers ! ! ! ! features 1) the use of a special partial glaze and the latest heating element structure, along with new high-density driver chips that can accept big current, has allowed rohm to achieve print speeds of 200mm/s, the fastest in its class. 2) one rank resistance value of 650 ? 3% eliminates the inconvenience of rank selection. 3) 2-inch, 3-inch and 4-inch series are available. ! ! ! ! external dimensions (units : mm) exposed conductor side insert direction max.1.7 max. 20.0 (5.1) 5 0.2 2-m3 (effective depth 3) 10.2 5.1 0.1 81 0.2 91 0.3 no.28 no.1 connector max.18 2.6 0.1 80 (effective print width) dot #1 dot #640
KF2003-GF41A printheads 2/4 ! ! ! ! equivalent circuit 5 vh gnd vdd stb2 stb1 lat di2 clk di1 tm tm dot #640 dot #1 shift register 2 shift register 1 thermistor fig.1 do2 do1 1 2 3 4 1,2,3,4 15 18 12 14 13 24 23 6 5 16 17 7-11,19-22 latch register ! ! ! ! pin assignments no. 1vh vh vh vh di1 gnd gnd gnd gnd gnd clk stb1 do1 2 3 4 5 6 7 8 9 10 11 12 13 14 circuit lat no. v dd tm tm stb2 gnd gnd vh di2 do2 vh vh vh 15 16 17 18 19 20 21 22 23 24 25 26 27 28 circuit gnd gnd
KF2003-GF41A printheads 3/4 ! ! ! ! timing chart clock (clk) data in (di) data out (do) latch (lat) "high":hold "low" :through "high":black "low" :white "high":black "low" :white strobe (stb) driver out tw clk t setup di t hold di td do t setup lat tw lat t setup stb tdo tdo t hold lat fig.2 ! ! ! ! characteristics effective printing width dot pitch total dot number average resistance value applied voltage applied power print cycle pulse width maximum number of dots energized simultaneously maximum clock frequency maximum roller diameter running life / pulse life operating temperature parameter ? rave v h p o slt t on 80 0.125 640 650 24 0.76 0.625 0.234 640 8 20.0 50/5 10 7 5~45 mm mm dots ? v w/dot ms ms dots mhz mm km/pulses c symbol typical unit ? ? ? ? ? ? ?
KF2003-GF41A printheads 4/4 ! ! ! ! electrical characteristic curves paper : kf50-hda (oji) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 012345 scanning line time ( ms/line) energy ( mj/dot) fig.3 adaptive speed chart 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.00 0.05 0.10 0.15 0.20 0.25 0.30 energy ( mj/dot) optical density slt : 0.620ms/line fig.4 representative density curve 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 012345 scanning line time ( ms/line) energy ( mj/dot) fig.5 maximum energy curve 0 20 40 60 80 100 120 140 160 180 ? 20 ? 10 10 30 50 70 0204060 temperature : ( c) resistance : (k ? ) fig.6 thermistor curve
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