Application
The target customer needs a heating mechanism for LCD panels to conduct durability grade test. The process requires the LCD panels to operate at a stressed temperature of 80°C (the normal operating temperature is 30°C ~ 40°C).
Customer
A LCD panel manufacturer
Requirements
1. Temperature control
▪ Application of accurate, concise and evenly distributed temperature to the LCD panel
2. Anti-static requirement
▪ Heat source cannot be in contact with LCD panels to prevent ElectroStatic Discharge (ESD)
▪ Heat source is insulated from the tester
3. Size of the heating area
▪ Cover surface larger than 600mm x 700mm (W x L)
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Solution
Silicone rubber heater is applied to directly cover the surface of the LCD panels. With this coverage, heat is transferred from the silicone rubber heater to the LCD panel surface. The heating mechanism also passes UL and CE international certification standards.
1. Temperature regulation
▪ Thermal sensor and thermostat added for better monitoring
▪ Flexible thermal controls for different testing modules
2. Multi-zone heating
▪ Multi-region design is implemented to ensure uniform heat distribution
3. Anti-static design
▪ Anti-static Teflon sheet is bonded to silicone rubber heater
▪ Anti-static protection circuit added to the rubber heater
4. Shape of the rubber heater
▪ Area coverage is tailored to match the LCD panel surface
5. Ease of use
▪ Light weight design for minimum overhead
▪ Ultra-thin silicone rubber material for easy testing operation
Silicone rubber heater's thinness makes itself the best solution to keep a flat object's temperature at a required constant. In the above case, the thoughtful design approach allows the factory to do product life testing more efficiently than originally required.
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