Datasheet

22
Introduction
Design
Guide
Polyimide
Heaters
Silicone
Rubber
Heaters (foil)
Standard
Polyimide
& Rubber
Rubber
Heaters
(wire-wound)
Mica Heaters
Thermal-Clear
Heaters
All-Polyimide
Heaters
Sensors,
Controllers &
Accessories
Reference
|
Flexible Heaters Design Guide | www.minco.com
Specifications subject to change
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 temperature sensors optional
• Rectangular, round, or irregular shapes
• Uniform or profiled heat patterns
Typical applications
• Cockpit displays
• Ruggedized computers
• Portable military radios
• Handheld terminals
• Outdoor card readers
• Portable and vehicular computers
• Camera lens deicing
• Defogging windows in environmental chambers
• Heating microscope stages
Custom options
• Integral RTD or thermistor sensors
• Flex circuit terminations
• Rigid materials
• Custom shapes and sizes to 11" × 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/cm²) 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.
0
5
10
15
20
25
-60°C -30°C 0°C 30°C 60°C 90°C 120°C 150°C
Maximum allowable power:
Watts/square inch of effective area
0.00
0.78
1.55
2.33
3.10
3.88
-76°F -22°F 32°F 86°F 140°F 194°F 248°F 302°F
Watts/square cm
MOUNTING METHOD:
Acrylic PSA
HEATER:
0.002” POLYESTER (0.05mm)
0.002” ADHESIVE (0.05 mm)
Example: At -20°C, the maximum power for a Thermal-Clear mounted with
acrylic PSA is 14 W/in² (2.17 W/cm²).
Thermal-Clear Heaters
Maximum Watt Density
Bezel
LCD
Thermal-Clear Heater
Backlight