Pure Green 0.4" 4 Digit 7 Segment LED Clock Display common cathode for home appliances

Product Overview

Introducing the Pure Green 0.4-Inch (10.16mm) 4-Digit 7-Segment Common Cathode LED Display—a home-appliance-optimized numeric solution engineered for digital clocks, timers, and status indicators. Designed to balance eye-friendly visibility, energy efficiency, and compactness, this display excels at showing daily-use metrics: time (e.g., "08:00" for morning alarms), cooking timers (e.g., "05:30" for microwaves), or appliance status (e.g., "24°C" for ACs).

Its 0.4-inch (10.16mm) character height ensures readability from 1–2 meters (typical kitchen/living room distances), while the slim 40.5×16×7mm form factor fits seamlessly into space-constrained appliance panels—from small countertop clocks to set-top box front displays. The white segments on a black surface boost contrast with pure green light (515-525nm), a hue known for reducing eye strain during prolonged viewing (ideal for bedroom clocks or 24/7 appliance timers). With common cathode polarity, low power consumption (5-10mA/LED), and RoHS compliance, it combines reliability, user comfort, and eco-friendliness—perfect for everyday home use.

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Key Features (Home Appliance-Optimized)

1. Eye-Friendly Pure Green Illumination

Gentle on Vision: Pure green light (515-525nm wavelength) is scientifically proven to reduce eye fatigue compared to harsher colors (e.g., red, blue)—critical for devices used daily (e.g., bedroom clocks checked at night, microwave timers monitored while cooking).

High Luminous Intensity (120-140mcd): Bright enough to cut through kitchen glare (overhead lights, sunlight) or dim bedroom lighting, ensuring time/timer readings are clear at a glance—no squinting or adjusting device position.

Even Light Distribution: White segments on a black surface eliminate "hot spots" across digits, so every segment (e.g., the top bar of "8" or the middle bar of "5") is uniformly lit—avoids misreading digits (e.g., confusing "6" with "0").

2. Energy Efficiency for Home Use

Extremely Low Current (5-10mA/LED): Minimizes power draw, making it ideal for battery-powered devices (e.g., portable digital clocks) or energy-efficient appliances (e.g., ENERGY STAR-certified microwaves)—extends battery life by 30% and reduces long-term electricity costs.

Low Forward Voltage (2.8-3.3V/LED): Compatible with standard home appliance power supplies (e.g., 5V USB, 12V DC adapters), avoiding the need for bulky voltage converters or custom wiring.

3. Reliable Performance & Easy Integration

Stable Operation in Home Environments: Withstands temperature fluctuations (0°C–50°C, typical for kitchens/bedrooms) and minor vibrations (e.g., microwave door slamming, fridge compressor cycles), maintaining consistent brightness—no flickering during time updates.

Long Lifespan (50,000+ Hours): High-quality LED chips ensure the display lasts as long as the appliance itself (e.g., 8–10 years for a microwave or clock), so users rarely need replacements—reducing maintenance hassle.

Common Cathode Polarity: Works with standard home appliance driver ICs (e.g., TM1637, HT1621, MAX7219) commonly used in digital clocks and timers—simplifies circuit design for manufacturers and supports quick integration into existing appliance models.

Easy Assembly: Designed for hassle-free PCB mounting, compatible with automated production lines for high-volume home appliance manufacturing—no specialized tools or training required.

4. Versatility & Compliance

Multi-Color Options: Beyond pure green, choose from red (for alerts), blue (modern aesthetics), amber, orange, or white—flexible for functional cues (e.g., red for "timer done" alerts) or brand-specific appliance designs.

RoHS Compliant: Free from harmful substances (lead, mercury), meeting international safety standards for home electronics—safe for use in family spaces (e.g., kitchens where children may interact with appliances).

Technical Specifications

Applications

This display is tailored for home appliances and daily-use devices, including:

Digital Clocks: Tabletop clocks, wall-mounted clocks, or bedroom alarm clocks (gentle green light for night viewing).

Home Appliance Timers: Microwaves, ovens, or air fryers (showing cook time or auto-shutoff countdowns).

Set-Top Boxes: Front-panel time displays (e.g., "19:45" for TV show start times) or channel indicators.

Temperature Controllers: Fridge/freezer thermometers (e.g., "5°C"/"-18°C") or AC room temperature displays (e.g., "24°C").

Digital Indicators: Portable battery chargers (charge time) or small kitchen scales (timer for food prep).

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Why Choose This Display for Home Use?

Eye Comfort: Pure green light reduces strain during daily/night use—perfect for devices checked multiple times a day (e.g., microwaves, clocks).

Home-Sized Fit: Slim 40.5×16×7mm dimensions fit into compact appliance panels, avoiding bulky redesigns of existing models.

Energy Savings: Low current use cuts electricity costs and extends battery life—ideal for eco-conscious households.

Reliable Daily Performance: Withstands typical home wear (temperature changes, minor vibrations) and lasts for years—no frequent replacements.

Safe for Families: RoHS compliance ensures no harmful substances, making it suitable for kitchens, bedrooms, or playroom devices.

Order & Logistics Information

Minimum Order Quantity (MOQ): 300 pieces for standard pure green models; 500 pieces for custom colors/configurations.

Packing: Protective EPE (Expandable Polyethylene) + anti-static carton (ensures segments and pins remain intact during shipping).

Delivery Time: 5–7 days for standard models; 10–12 days for custom colors or configurations.

Transport: Express (FedEx/DHL for urgent prototype orders), Air (medium-volume shipments), Ocean (bulk production runs for appliance manufacturers).

Contact Us

Our team specializes in LED displays for home use and provides 24-hour support to help you optimize your appliance's usability, comfort, and design!