Automotive Electroluminescent

Flexible Touch Sensor

Flexible Touch Sensor

Check out our new product group, the Flexible Touch Switch and see how you can use our technology for your type of product!

EL on Fabric

EL on Fabric

Now you can print EL fabric! Enhance your products with our electroluminescent panels.


Cochief's Automotive Electroluminescent

Cochief Industrial Co., Ltd. is a lighting product manufacturer that is mainly focusing on designing and developing electro-luminescent product from Taiwan, since 1998.

Cochief's RoHS certified and patented Automotive Electroluminescent are sold worldwide. Along with the newly introduced products, including electroluminescent keypads, flexible touch-switch, EL plates, EL inverters, light guide products, LED plates and lamps, Cochief has become a leading supplier with a great reputation.

Both with electroluminescent advanced technology and 21 years' manufacturing experience of EL Panels and Light Guide Film, Cochief ensures each customer's demands are met.

Automotive Electroluminescent

EL Car Gauge

Automotive Electroluminescent
Automotive Electroluminescent


1. Cool to the touch, no heat
2. Uniformity
3. Thin profile and flexibility
4. Low power consumption
5. Basic colors: Blue, Blue-green,Green, Pink-white, we can make bright-colored effect by using the combination of special painting dyes and color sheet.
6. Reasonable Cost
7. Light weight
8.Thickness: < 0.5mm (super thin)
9.Versatile drive conditions
10.Resistant to heat
11.Life not affected by vibration or mechanical shock
12.Performance not affected by power cycling
13.Individually addressable lit areas
14.Cool lighting Connections can be located anywhere on the lamp


Solid and stable
Comes in any size or shape, with or without holes
Connections can be located anywhere on the lamp
Versatile, graphics can be printed on illuminated surface
Graphics can be printed on illuminating surface
Performance not affected by power cycling
Individually addressable lit areas
Applications: mobile phones, remote controls, keyboard

What is EL ?

An electro luminescent lamps electrically similar to a capacitor two conducting surfaces (light-emitting phosphor layer) with a dielectric layer between. EL lamps illuminate when powered with AC power. As voltage is applied to the conductive surfaces, an electric field is generated across the phosphor anddielectric layers. Twice during each cycle electrons are excited and emittedlight through the transparent front electrode.

The basic building block for the EL lamp is aluminum foil. Serving as the back electrode, the foil has dielectric coating applied to give the lamp high voltageintegrity. A layer of light emitting phosphor is then applied. Screened onto thephosphor is the transparent front electrode, which defines the lit area. On top ofthe electrode an opaque bus bar is screened, to provide a more uniform electricfield across the entire lamp surface, insuring more uniform luminance. Frontand back leads, specially treated to insure the moisture barrier is notcompromised, are applied to provide power access. Finally, the entire sandwichis enclosed in an Aclar package to protect the lamp from exposure toenvironment, especially moisture, and to provide electric insulation.

Safety/Quality Approvals

1. Cochief EL Product is accordance with RoHS
2. ISO 9001:2008 Certificate
3. D-U-N-S Certificate
4. TüV Taiwantrade supplier verification
2. ISO 9001:2008

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