Graphical/Numeric Displays

Graphical/numeric displays are designed for presenting graphical and numerical information and are widely used in consumer electronics, control devices, and instrumentation.

The main display technologies include:

LCD Displays: Seven-segment displays are commonly used for basic numbers and letters, but are limited by their inability to display diagonal characters. Multi-segment displays (such as 14 or 16 segments) improve letter readability, but the large spacing between characters affects aesthetics. Dot matrix displays (such as 5×7 arrays) are economical and practical, supporting clearer alphanumeric characters. Color displays, by adding red, green, and blue filters, achieve richer colors and are gradually replacing monochrome screens.

Digital Displays: For example, Nixie tubes (Nuclear Nixie tubes) use neon discharge to display digital symbols, requiring a high DC voltage. Projection displays use a low-voltage optical system, utilizing film and light sources to achieve clear projection. Other types include fluorescent tubes, field-effect light-emitting diodes (FETs), and liquid crystal displays (LCDs), which support high-fidelity signal transmission and color calibration.

These components offer high signal fidelity, simple and reliable system architecture, and are capable of effectively displaying dynamic images and performing color correction. They are suitable for microwave ovens, automotive instrumentation, and industrial control equipment.