KF2003-GR40A printheads 1/4 compact medium speed thick film thermal printhead (8dots / mm) KF2003-GR40A the KF2003-GR40A is ideal for applications that require compact, lightweight thermal printheads, such as pos and label printer applications. the 2-, 3-, and 4-inch sizes have a resolution of 203dpi. this series is suitable for a wide range of applications. ! ! ! ! applications pos printers label printers receipt printers general purpose compact printers ! ! ! ! features 1) both rohm?s advanced lsi technology and proprietary partial glaze are used to realize higher printing efficiency. with a high print speed of 100mm/s, this series is also suitable for thermal transfer printing. 2) besides the fact that harness-type direct connectors at either end allow wring to be fitted as convenient, the thermal printheads can be applied directly to the substrate without a heat sink. both these features give engineers greater freedom when designing the printer mechanism. 3) one rank resistance value of 800 ? 3% eliminates the inconvenience of rank selection. ! ! ! ! external dimensions (units : mm) dot #576 83 (heatsink width) 72 (effective print width) epoxy resin coated dot #1 16 0.2 15.1 1 2.6 0.1 no.9 no.1 no.9 no.1 connector b connector a max.1.7 5.85 max. 14.0 4.6 5 73 2-m3 (effective depth 4.5)
KF2003-GR40A printheads 2/4 ! ! ! ! equivalent circuit vh gnd stb4 stb3 di v dd tm vh 8,9 1,2 8,9 7 6 5 4 3 dot #576 dot #1 1,2 5 6 7 lacth register shift register 4 3 gnd stb1 stb2 lat do clk connector a connector b 4321 fig.1 thermistor 30k ? b3950 ! ! ! ! pin assignments no. 1 2 3 4 5 6 7 8 9 circuit no. 1 2 3 4 5 6 7 8 9 circuit connector a connector b gnd gnd tm v dd di vh vh vh vh do clk gnd gnd stb1 stb2 lat stb3 stb4
KF2003-GR40A printheads 3/4 ! ! ! ! timing chart clock (clk) data in (di) data out (do) latch (lat) 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 "high":black "low" :white "high":black "low" :white "high":hold "low" :through 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 72.0 0.125 576 800 24.0 0.64 1.25 0.28 288 4 14.0 50/5 10 7 5~45 mm mm dots ? v w/dot ms ms dots mhz mm km/pulses c symbol typical unit ? ? ? ? ? ? ? ?
KF2003-GR40A 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
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