128*64 Backlit LCD

Updated: 2026-09-18

Overview

The 128*64 Backlit LCD is a compact graphical display module widely used in embedded systems and electronic devices. Its 128x64 pixel resolution provides sufficient space for displaying text, icons, and simple graphics. The integrated LED backlight ensures visibility in low-light conditions, making it suitable for various industrial and commercial applications. These displays commonly use ST7565 or KS0108 controllers and support multiple communication protocols. Their low power consumption (typically 5-20mA) makes them ideal for battery-powered devices. The standard module size is about 93x70mm with viewable area dimensions of approximately 72x40mm.

Structure and Working Principle

The display consists of multiple layers: a glass substrate with patterned electrodes, liquid crystal material, polarizing filters, and a reflective or transmissive backlight system. When voltage is applied to specific segments, the liquid crystals align to block or allow light transmission, creating visible pixels. The backlight system typically uses white LEDs positioned at the edges (edge-lit) or behind the display (direct-lit). Edge-lit designs are more common for these small displays as they provide even illumination while maintaining slim profiles. The controller IC manages pixel addressing and communicates with the host microcontroller through parallel or serial interfaces.

Key Features

These LCD modules offer several advantages for industrial applications. The monochrome display provides excellent contrast (typically 1:10 or better) and remains readable in various lighting conditions. The viewing angle often exceeds 140 degrees, making them suitable for devices that may be viewed from different positions. Most models operate across a wide temperature range (-20°C to +70°C), with some industrial-grade versions supporting -30°C to +80°C. The typical response time is 200-300ms, sufficient for most instrumentation and control applications. Many units feature adjustable contrast and programmable backlight brightness to optimize power consumption.

Application Areas

128*64 Backlit LCDs serve diverse industries due to their reliability and cost-effectiveness. In industrial automation, they're used for operator panels, process indicators, and equipment status displays. Medical devices utilize them for patient monitors and diagnostic equipment interfaces. Consumer applications include point-of-sale systems, fitness equipment displays, and household appliance control panels. They're also popular in DIY electronics and maker projects due to their simplicity and widespread driver support. Automotive applications include aftermarket navigation systems and diagnostic tools, though automotive-grade versions with extended temperature ranges are required for dashboard integration.

Maintenance and Precautions

Proper handling extends the lifespan of these displays. Avoid touching the glass surface directly to prevent contamination or electrostatic discharge damage. When cleaning, use a soft, lint-free cloth slightly dampened with isopropyl alcohol—never apply liquids directly to the display. For installation, ensure the module isn't subjected to excessive mechanical stress or bending. The recommended operating voltage (typically 3.3V or 5V) should not be exceeded to prevent damage to the controller IC. In environments with significant electrical noise, proper grounding and shielding techniques should be employed to maintain display stability.

B2B Procurement Guide

When sourcing 128*64 Backlit LCDs in bulk, consider several technical and commercial factors. Verify the controller compatibility with your existing systems—some manufacturers offer pin-compatible alternatives to standard controllers. Request samples to evaluate viewing angle performance and backlight uniformity under your specific lighting conditions. For long-term projects, inquire about product lifecycle status to avoid obsolescence issues. Minimum order quantities typically range from 100-1,000 units, with pricing tiers at various quantity breaks. Lead times vary from 2-8 weeks depending on customization requirements. Consider requesting RoHS and REACH compliance documentation if exporting to regulated markets.