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EL
Electroluminescent backlights are the thinnest of all lighting technologies (as thin as 0.200mm) and can have an initial brightness as much as 50 cd/m2 when driven at nominal power. EL backlights offer excellent uniformity and are relatively easy to retrofit into an application. However, the light output of EL backlights degrades rapidly compared with other lighting technologies (EL’s half life is about 3000 hours). Brightness can also be an issue. In many display applications EL backlights may not be bright enough. EL lamps are typically driven by a 50-70v AC source at a current of 5mA. This is generally generated by an inverter module requiring a 5v or 12v DC source.
| Pros | Cons |
| White, Red, Green, Blue or Yellow available |
Require high voltage AC inverter |
| Down to 0.2mm thickness | Generally 3,000 to 5,000 hours to half life |
| Good uniformity > 90% |
Electrically noisy |
| Low power < 300mW |
Low brightness < 50cd/m2 |
| Low heat generation | Not suitable in high humidity |
| Lightweight | |
| Ideal for small to medium displays |
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| Customisable | |
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