In the highly competitive TV manufacturing industry, ensuring the top-notch quality and reliability of televisions is of utmost importance. One crucial step in achieving this is the TV aging test. But why exactly do we need it? Let's dive in.
The Significance of TV Aging Tests
Television sets are complex electronic devices that consumers rely on for years of continuous use. The aging test serves as a safeguard to guarantee their long-term stability and dependability. By simulating a wide range of real-world usage scenarios and environmental conditions, manufacturers can identify and rectify any potential design flaws or component issues before the products hit the market.
Although LED lights in TVs are claimed to have a lifespan of tens of thousands of hours, the reality is that LED performance does degrade over time. When an LED reaches around 50% of its rated lifespan, a noticeable decrease in brightness can occur. This is where the aging test comes into play, detecting such issues early on.
What Can TV Aging Tests Detect?
- Stability Testing: This involves running the TV continuously for an extended period. We rigorously switch between various apps to monitor for any performance degradation or malfunctions. This way, we can ensure that the TV can handle the demands of prolonged use without glitches.
- Temperature and Environmental Testing: Different temperature and humidity levels can impact a TV's performance. In our testing facility, we group multiple TVs together and turn them on fully. The heat generated mimics a hotter environment, allowing us to assess how well the TV functions under such stress. This is crucial as temperature fluctuations can affect the internal components and overall operation.
- Power Supply and Withstand Voltage Testing: A stable power supply is essential for a TV's proper functioning. Our tests evaluate the power supply system's stability and safety, ensuring it can handle various voltage conditions. A failed test in this regard could lead to a burned-out motherboard, rendering the TV useless.
- Screen Testing: The screen is the heart of a TV's visual experience. We meticulously check for brightness decay after long-term use and look for any pixel failures or damage. This is the most critical aspect of the aging test as it directly impacts the display quality. Multiple TVs undergo this test simultaneously, with color switching to simulate diverse viewing situations.
Expected Outcomes after TV Aging Tests
Our comprehensive aging tests typically span a week. By creating the right environment, including temperature variations and high usage patterns, the TV endures conditions equivalent to several years of regular use in a short time.
- Maximum Brightness Monitoring: We record the changes in brightness over the testing period. This data helps us predict the backlight's lifespan accurately. As a responsible factory, we strive to maintain the backlight attenuation within a reasonable range, ensuring consistent visual performance.
- Color Display Accuracy (ΔE): LCD screens have a unique sandwich structure. The color filters and liquid crystal bias speed have specific life limits. Color filters, often made of organic materials, can fade, age, or get damaged over time and with changing usage. This can lead to inaccurate or dull color display. Although their lifespan usually exceeds that of the backlight, significant color cast during the aging test signals a potential problem with the batch of screens.
- CA - 210 Color Analyzer: This advanced tool is a key asset in our aging test process. It collects data on maximum brightness and color values multiple times. By analyzing this data, we can calculate the performance decay of the LCD screen and predict its lifespan more precisely.
Edge LED vs Direct LED: The Impact on TV Performance and Lifespan
The temperature has a profound connection with the optical structure, especially the backlight installation method.
- Edge LED (ELED): In this design, the backlight strip is installed along the edges of the TV, usually at the bottom for large-size TVs or on the sides for small-size TVs. Renowned brands favor ELED for its space-saving advantage. It allows for thinner TV designs as the light strip and lamp beads don't need to be fixed in the middle of the TV back. For small-size TVs with minimal luminous flux requirements, ELED is a cost-effective choice. However, for large-size TVs, it has a drawback. The concentrated heat at the bottom, especially for a 75-inch TV with a significant screen area (e.g., 170cm x 100cm), demands a powerful bulb group to achieve the standard brightness. This intense heat can affect the optical film, making it fragile over time. If there's a supporting structure for the optical film, it can cause damage, resulting in unbalanced light uniformity and visible bright spots.
- Direct LED (DLED): Here, the light strips are evenly installed across the back of the TV. When densely installed, it's known as Full Array LED. The even distribution of backlight strips means each bead uses less power, generating less heat. Additionally, the thicker design allows for better heat dissipation. Consequently, the optical film has a longer theoretical lifespan as it experiences less concentrated heating.
Conclusion
The TV aging test is an essential and non-negotiable part of the manufacturing process. Without it, quality control would be severely compromised. We hope this article has provided you with a comprehensive understanding of the aging test's concept, purpose, and significance. If you're involved in the TV business or planning to purchase TVs in bulk, don't hesitate to reach out to us. We are committed to offering high-quality solutions that meet your specific requirements and ensure customer satisfaction.
