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| | | Comparison of Backlighting Options | | |
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| | | | | | | | | | | | | Electroluminescent Lamps | Optical Fiber | Light Emitting Diodes | Light Bars | | | | Visibility | moderate | moderate (depends on LEDs) | moderate to high (sunlight readability available) | moderate (large, bright surface) | | | | Longevity | moderate | moderate | highest | high | | | | Electrical Usage | low | low (depends on light source) | moderate | moderate | | | | Heat Output | low | none | low | low | | | | Emissions | moderate | none | low | low | | | | Electromagnetic Interference | moderate | none | low | low | | | | Cost | high | high (in low volume) | low (in high volume) | moderate | | | | Special Considerations | high voltage required | rarely used in keypad applications | multiple colors variable intensity | package size limits mechanical design options | | | | | | | | | | | | |
| | | Carefu l con siderati on of the trade-offs between the different backligh ting applications available, the product i n design, and environmenta l requirements are all crucial elem ents eo the product's performance, reliability, and fitness for use. | | |
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| | | For more information, call 1-800-444-5923 or visit www.advanced-input.com | | |
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| | | Esterline"' | | |
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| | | f Advanced Input Systems | | |
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