OLED Temperature and Humidity Test: Ensuring Robustness and Longevity

In the ever-evolving world of television technology, the spotlight has shifted from plasma TVs to the captivating realm of Organic Light Emitting Diode (OLED) displays. While providing stunning visuals, OLED screens demand meticulous care due to their sensitivity to environmental factors. In this blog, we delve into the OLED Temperature and Humidity Test, a critical evaluation ensuring the robustness and longevity of OLED panels.

1. Understanding OLED Technology

OLED technology involves a complex interplay of organic compounds known as pixels. These compounds emit light when an electric current passes through them, forming the basis of electroluminescence. The OLED panel consists of key components such as a substrate, a back panel (driver electronics), a front panel (housing organic material and electrodes), a graphic overlay(adding touch), and a crucial encapsulation layer. Given OLED’s susceptibility to oxygen and moisture, the encapsulation layer becomes pivotal in preserving display quality.

2. Significance of Temperature and Humidity Testing:

Temperature fluctuations and humidity levels can significantly impact the performance and lifespan of OLED displays. Silicon photodiodes, integral to OLED technology, operate within a specific temperature range. Deviations from this range can alter photoelectric conversion efficiency and dark current, affecting the accuracy of brightness measurements.

3. OLED Temperature and Humidity Test Method:

The meticulous testing process involves controlled cycles of temperature and humidity variations. Starting with a rise to a specified high temperature and maintaining relative humidity, the test subjects the OLED panel to conditions simulating real-world scenarios. The cyclic nature of the test ensures the OLED’s resilience to prolonged exposure and its ability to maintain optimal functionality.

1. Within 1.5 to 2.5 hours, the temperature of the constant temperature and humidity chamber should steadily rise to the specified high temperature. During this period, the relative humidity should be maintained within the range of (93±3)%.
2. After 5.5 hours from the start of the cycle, the temperature inside the chamber should remain at the specified high temperature, with relative humidity maintained within (93±3)%.
3. Within 1.5 to 2.5 hours, the temperature of the constant temperature and humidity chamber should be reduced to 25°C±2°C. During this period, the relative humidity should be maintained within the range of 80% to 96%.
4. Starting from 8 hours into the cycle, the temperature of the test chamber should again steadily rise to the specified high temperature within 1.5 to 2.5 hours. During this period, the relative humidity should be maintained within the range of (93±3)%.
5. From the start of the cycle until 13.5 hours, the temperature and relative humidity inside the chamber should be maintained at the specified high temperature and (93±3)% respectively.
6. Within 1.5 to 2.5 hours, the temperature of the constant temperature and humidity chamber should be reduced to 25°C±2°C, with relative humidity maintained within the range of 80% to 96%.
7. The temperature inside the test chamber should continue to stabilize at 25°C±2°C and relative humidity at (93±3)% until either the specified low-temperature sub-cycle begins or the 24-hour cycle ends.
8. 

Please note:

– The duration under each condition should not deviate from the specified value by more than ±10 minutes.

– When exposed to moisture inside the constant temperature and humidity chamber and subsequently cooled, the time it takes for the temperature to drop from 25°C±2°C to -10°C±2°C should not exceed 1.5 hours. The sample should be maintained at the low temperature for 3 hours.

4. Conclusion:

As consumers immerse themselves in the vibrant visuals of OLED displays, it’s essential to acknowledge the rigorous testing behind the scenes. The OLED Temperature and Humidity Test emerges as a crucial checkpoint, assuring users of a display technology that stands the test of time and environmental challenges. For detailed technical specifications and adherence to testing parameters, please refer to the official documentation and standards provided by LinkoTest.