This document introduces the basic knowledge of LCD construction, working principles, and driving methods, and demonstrates how to drive multiplexed LCD using PSoC technology.
The note introduces LCD construction, polarization principles, and basic operation, then describes three display modes (transmissive, reflective, and transflective). It also covers temperature effects, drive voltage requirements, and the differences between static and multiplexed LCDs.
The document shows how to implement LCD driving using PSoC, providing waveform examples, PWM‑based contrast adjustment, and a complete hardware/software example with timing calculations and pin configurations. This manual is written in Chinese.
| Nominal operating voltage | 5 V |
|---|---|
| LCD frame frequency (example) | 64 Hz |
| LCD electrode capacitance range | 3–20 nF |
Only AC voltage can be used; DC voltage will damage the liquid crystal.