Catalogue Flexible Heaters Design Guide
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Thermal-Clear™ Transparent Heaters
Overview
Featuring a micro-thin wire heating element laid in a pattern between optical grade polyester sheets, Thermal-Clear™ heaters provide reliable heat without blocking light.
• Custom heater element routing and profiling optimizes the visual clarity of the LCD and prevents "shadowing"
• Tight resistance tolerance provides constant and repeatable wattage output for longer battery life
• Low mass and high watt density offers faster warm up time needed for immediate LCD response in cold weather operation
• Rugged materials prevent costly damage during installation and handling
• Integral industrial temperature sensors optional
• Rectangular, round, or irregular shapes
• Uniform or profiled heat patterns
Typical applications
• Cockpit displays
• Portable military radios
• Outdoor card readers
• Portable and vehicular computers
• Camera lens deicing
• Defogging windows in environmental chambers
• Heating industrial microscope stages
Custom options
• Integral RTD or thermistor sensors
• Flex circuit terminations
• Rigid materials
• Custom shapes and sizes to 11" x 22" (280 x 560 mm)
• RoHS compliance
• Contact Access: Minco Sales and Support for design assistance
Thermal-Clear heaters and LCDs
Most dot matrix LCDs lose sharpness and response speed below 0°C. Achieve acceptable performance at much colder temperatures with a Minco Thermal-Clear heater. 1-2 W/in2 (0.16 - 0.31 W/cm|2) will keep a typical LCD operating properly in ambients as low as -55°C.
Shown below is a typical installation on a backlit LCD. The heater is sandwiched between the backlight and the LCD. We recommend a light diffuser between the heater and LCD if there is no diffusion coating on the back of the LCD. Diffusion will soften and conceal shadows cast by the heating element.
Thermal-Clear Heater Backlight
Thermal-Clear Heaters Maximum Watt Density
76°F -22°F 32°F 86°F
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140°F
194°F
248°F
302°F
25
MO Acr
UNTING M ylic PSA
ETHOD:
HEATER:
0.002" PO 0.002" AD
-YESTER (0.0 HESIVE (0.05
5mm) mm)
3.88
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3.10
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1 >
15
2.33
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m c
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1.55
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0.78
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0.00
150°C
Configure Minco heaters and order online at:
www.minco.com/heater_config/
-60°C
-30°C
0°C
30°C
60°C
90°C
120°C
Example: At -20°C, the maximum power for a Thermal-Clear mounted with acrylic PSA is 14 W/in2 (2.17 W/cm2).
Specifications subject to change
Ml
Flexible heaters Design Guide | www.minco.com 39
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