KF2002-GD45A printheads 1/4 compact medium speed thick film thermal printhead (8 dots / mm) KF2002-GD45A using its expertise in lsi technology, rohm has developed new high density driver chips for use in the KF2002-GD45A . capable of being employed for both thermal and thermal transfer printing, with a print speed of 200mm/s, the resulting print heads are the fastest in their class. this high-speed and high-density printing answers the needs of pos, atm, kiosk and ticket printing devices, which are increasingly being called upon to produce graphical output. ! ! ! ! applications pos printers atm printers kiosk printers ticket 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 with using thermal history control, the fastest in its class. 2) standard printheads in the line up are capable of 203 or 300 dpi. they achieve the high resolution needed for graphics and other complex print patterns. 3) one rank resistance value of 800 ? 3% eliminates the inconvenience of rank selection. 4) 2-inch, 3-inch and 4-inch series are available. ! ! ! ! external dimensions (units : mm) 65 56 (effective print width) 55 0.2 2 ? m3 (effective depth 3) 5 0.2 5.1 0.1 (10.2) dot #448 2.6 0.1 max.20 dot #1 connector b connector a no.15 no.1 no.1 no.15 5.1 0.4 4 0.2 20.0
KF2002-GD45A printheads 2/4 ! ! ! ! equivalent circuit vh gnd stb4 stb3 di tm tm vh 12,13,14,15 12,13,14,15 1,2,3,4 9 10 6 7 5 8 dot #448 dot #1 1,2,3,4,5 9 8 11 latch register shift register thermistor 30k ? b:3950 connector b connector a 6 7 gnd stb1 stb2 lat do clk v dd fig.1 1 2 3 4 ! ! ! ! pin assignments no. 1vh vh vh vh do lat clk v dd stb1 stb2 nc gnd gnd gnd gnd 2 3 4 5 6 7 8 9 10 11 12 13 14 15 circuit no. 1 gnd connector b connector a gnd gnd gnd gnd tm tm stb4 di vh vh vh vh 2 3 4 5 6 7 8 9 10 11 12 13 14 15 circuit nc stb3
KF2002-GD45A 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 56.0 0.125 448 800 24 0.64 1.25 0.275 448 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 ? ? ? ? ? ? ?
KF2002-GD45A 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 : 1.25ms/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
|
