EL Panel Prototyping & Connection Guide

Introduction

Prototyping EL panels is an excellent way to test ideas, shapes, and customization options before committing to manufacturing. While most EL panels are not ideal for cutting, our prototyping panels are specifically designed for it, giving you the flexibility to experiment with custom shapes and configurations.

This guide walks you through the prototyping process, from understanding panel composition through proper connection and sealing techniques.

What is an EL Panel

EL panels use electroluminescence to produce light. This technology requires an inverter to convert DC power into high voltage, high frequency AC power, which excites phosphor compounds within the panel to emit light uniformly across the entire surface.

Panel Construction

EL panels are built from multiple layers, each serving a specific purpose:

• ITO Transparent Conductor: The top layer that conducts electrical current
• Phosphor Layer: Emits light when excited by the high frequency electrical field
• Dielectric Layer: Insulates and manages the electrical field distribution
• Bus Bar Electrode: Distributes power evenly across the panel
• Protective Substrate: Provides structural support and protection from moisture and debris

Panel Composition

Each EL panel consists of two main structural portions that work together:

Main Panel

The primary light-emitting area. This is the bulk of the panel where the phosphor layer sits, creating the uniform glow when powered.

Bus Bar

A conductive edge that runs around the perimeter of the panel. The bus bar distributes electrical current evenly across the entire phosphor layer, ensuring uniform brightness with no hot spots or dark areas.

Important: When cutting custom shapes, always ensure that at least one edge of the bus bar remains intact. This is critical for proper power distribution across the panel.

Wiring Diagrams

Battery Operation

For portable prototyping setups, you can power your EL panel from a DC battery via an inverter. The inverter converts the DC voltage to high frequency AC power needed to excite the phosphor. Most portable setups use 9V or 12V DC batteries.

Wall Power (AC) Operation

For permanent installations or longer duration testing, connect the inverter to standard wall AC power. This provides consistent power without battery drain, making it ideal for displays and permanent signage applications.

Note: Always follow your specific inverter's wiring instructions. Connection methods vary by inverter model.

Cutting the Panel

Prototyping panels can be cut to custom shapes, but this requires careful technique and immediate sealing to prevent damage and electrical hazards.

Safety Warning

CRITICAL: Cutting exposes the internal electrode layers of the panel. If the panel is powered during or after cutting with exposed edges, there is a risk of electrical shock. NEVER power a panel with exposed, unsealed edges. Ellumiglow is not responsible for injury from improper panel handling or use.

Tools Needed

• Sharp utility knife or precision scissors
• Metal ruler or straightedge for guided cuts
• Clear nail polish or epoxy for immediate sealing
• Clean cloth or lint-free paper

Cutting Technique

• Measure and mark your cut lines carefully using a ruler and pencil
• Use a sharp blade to score the panel in a single, clean motion
• Avoid making jagged or uneven cuts, as these are harder to seal
• Cut away from any bus bar connections when possible
• Once cut, immediately proceed to the sealing step – do not leave edges exposed

Making Connections

Proper electrical connections are essential for safe operation and reliable panel performance.

Using the Connection Kit

Your prototyping kit includes crimp connectors and soldering supplies. Follow these steps to make secure connections:

1. Prepare the tabs: Locate the crimp tabs on the bus bar
2. Solder first: PRO TIP: Solder your wires to the crimp tabs BEFORE attaching them to the panel. This prevents heat damage to the panel itself
3. Use needle nose pliers: Crimp the connectors securely with precision pliers
4. Test continuity: Use a multimeter to verify electrical connection before powering the panel
5. Seal and epoxy: Once connections are complete and tested, proceed to seal all connection points with epoxy

Sealing & Epoxy

Sealing is critical to protect exposed electrode layers from moisture, debris, and electrical hazards.

Sealing Cut Edges

For edges created by cutting:

• Clean the edge with a dry cloth to remove any dust or debris
• Apply a thin, even coat of clear nail polish (quick temporary seal) or 2-part epoxy (permanent seal)
• Allow to dry completely before powering the panel
• For best results, apply a second coat once the first has dried

Sealing Connections

After soldering and crimping:

• Mix 1:1 ratio epoxy (use the 5-minute cure variety for quick prototyping)
• Apply a generous amount around all solder joints and connection points
• Smooth out with a toothpick or small tool to ensure full coverage
• Allow 5 minutes for epoxy to set (do not power until fully cured)

Burn-In and Normal Operation

Brief sparking or crackling sounds during the first few seconds of operation are normal as the panel reaches full brightness. This is the "burn-in" phase. If sparking continues for more than a few seconds, or if you smell unusual odors, power off immediately and check your connections.

Frequently Asked Questions

What are EL Panels?

EL panels are flat, thin sheets that produce uniform light across their entire surface using electroluminescence technology. They require an inverter to convert DC power to high frequency AC, which excites phosphor compounds to emit light.

Why do EL panels make a high frequency noise?

The high frequency AC voltage (typically 600–2000 Hz) can produce an audible hum or buzz. This is normal and is a characteristic of the technology. The frequency depends on your inverter model.

Does an EL panel require an inverter?

Yes, EL panels require an inverter to convert DC battery or wall power into the high frequency AC power needed to operate the panel. You cannot power an EL panel directly from DC current.

Can EL panels be cut during manufacturing?

Yes, EL panels can be cut to custom shapes during manufacturing. However, we recommend prototyping first with our Prototyping Panel kit to test your design before committing to tooling costs.

Can EL panels be customized?

Absolutely. Ellumiglow offers complete customization at our manufacturing facility, including any shape, size, color, and even custom logos or designs. A $500 NRE (non-recurring engineering) tooling fee applies for custom shapes, and you retain ownership of the tooling for future production runs.