问 请教各位：
4XX系列LCD驱动电路的分压电阻应取多大，驱动LCD的电流是从分压电路获取的吗？
我用3个1M的电阻分压，三个电阻的压降不等，分别为0.7V,0.6V,1.5V，显示效果很差；
若用10K的电阻分压，则压降都为0.9V左右，显示效果可以；
100K的马马乎乎；
请问，驱动LCD的电流是从分压电路获取的吗？ 答 1: [quote]
The voltages required for the LCD signals are supplied externally to pins R33,R23, R13, and R03. Using an equally weighted resistor divider ladder between these pins establishes the analog voltages as shown in Figure 16–3. The resistor value R is tyPICally 680 k ohm Values of R from 100kohm to 1M ohm CAN be used depending on LCD requirements.
答 2: 在利尔达下的rev.A,讲的不全，今天在TI下了rev.C,果然有，多谢！