清达光电生产的HC4021字符液晶模块完全兼容华凌光电的WH4002A液晶模块，该屏内置KS006及其兼容控制器，电压5V/3V可选，接口并口串口可选，显示效果为蓝底白字或者黄绿底黑字
HC4021介绍如下
DIMENSIONAL OUTLINE 182.0(W)×33.5(H)×13.6MAX.(T) mm
VIEW AREA 154.4(W)×16.5(H) mm
EFFECTIVE V/AREA 147.5(W)×11.5(H) mm
NUMBER OF CHARACTERS 40Characters×2Lines ---
CHARACTER SIZE 3.20(W)×5.55(H) mm
DOT SIZE 0.60(W)×0.65(H) mm
INPUT DATA 68 SERIES
DUTY 1/16DUTY
VIEW ANGLE 6 O’CLOCK
CONTROLLER SPLC780D1 OR EQUIVALENT
BEZEL 0.6T
BACKLIGHT LED (WHITE)
OPERATING TEMPERATURE -20 oC ~70 oC
STORAGE TEMPERATURE -30 oC ~ 80 oC
