Email Us

Reliability Testing of the LCD SPI

The LCD liquid crystal display screen needs to undergo various types of tests before it leaves our factory, to ensure that our display screens are reliable, stable, and of good quality. As LCD liquid crystal displays are box-shaped structures made of glass and liquid crystal materials, they are limited by factors such as temperature and humidity, and typical liquid crystal displays have product defects in terms of operating temperature and storage temperature. Therefore, the reliability testing of LCD SPIs is particularly important.


The reliability testing of LCD SPIs refers to the conditions under which our SPI products are reliable and stable. Through reliability testing, customers recognize the durability and reliability of our display screen products. Before implementation, our components need to be exposed to adverse environments such as temperature and humidity. In order to make the product conform to the expected function, we need to make a series of improvements to the product. The results of the SPI reliability test (including numerical values) can be found in our product specifications with detailed information and data.


Next, we will introduce all types of LCD SPI reliability testing and the testing process.


Storage temperature testing for the LCD SPI


The electrical performance of SPI products changes significantly with a large increase or decrease in temperature. These tests are conducted to assess the long-term exposure of the device to high and low temperatures when the SPI device is turned off.


Prior to testing, the test screen must be placed at the set temperature for a period of time. After the test is completed, the test screen is visually and electrically inspected within the specified time. The temperature in the laboratory starts at room temperature and increases and decreases with each test until damage to the test screen is observed.


Operating temperature testing for the LCD SPI


These tests differ from the previous scenario in that there is voltage present. In other words, the test screen is being tested during its operation. Typically, the temperature range that passes these tests is smaller than that of storage testing.


Temperature cycling testing for the LCD SPI


Defined as the device's tolerance to periodic temperature changes. During a relatively short period of time, the test screen is heated and cooled. This test tells you how well the display screen product can withstand temperature shocks. These tests are also conducted in special test rooms.


Vibration testing for the LCD SPI


In this test, the test screen is vibrated by a special vibrator. The shocks are performed at specific frequency ranges and deviate in three directions.


Moisture resistance testing for the LCD SPI


The test screen is placed in a high-temperature chamber, but this time the humidity is also kept at a high level. Test results include temperature, relative humidity, and length of the experiment. RH refers to relative humidity.


Packaging drop testing for the LCD SPI


The suspended rod fixes the packaged SPI product at a specific height and drops it at an appropriate angle to check the product and its packaging for qualification.


ESD (Electrostatic Discharge) Testing for the LCD SPI


ESD refers to the sudden current that appears between two objects with different electric potentials, usually generated by energization. This phenomenon can be observed in daily activities when a large amount of negative charge accumulates on the human body, such as friction on clothes/carpets.


We feel it as an "electric shock"-it can even be several kilovolts. Such discharges can permanently damage display screen devices, which is why ESD testing is necessary. The ESD generator is designed to simulate the human body, so its RC parameters (capacity and resistance) are similar to those of the human body. ESD testing is carried out in two situations, one is to contact the test object, and the other is to conduct air discharge at a specific distance.

Popular Articles of TFT LCD Display Modules & Accessories
  • How Should the Liquid Crystal Panel Be Maintained Best?How Should the Liquid Crystal Panel Be Maintained Best?September 26, 2022With the popularization of LCD TVs, notebook computers, LCD monitors and other liquid crystal panels, the cleaning of liquid crystal panels has also become the focus of users' attention. Many user...view
  • The Difference between OLED and TFT DisplaysThe Difference between OLED and TFT DisplaysDecember 9, 2022OLED is one of the hottest concepts in the current display industry, and OLED itself has many advantages. For another concept in the real industry - TFT, perhaps not so many people know about it. Toda...view
  • Application Scope and Technical Characteristics of 7-inch LCD ScreenApplication Scope and Technical Characteristics of 7-inch LCD ScreenOctober 31, 2022Now we can see 7-inch TFT LCD screens in many places. Compared with small and medium-sized TFT LCD screens, 7-inch TFT LCD screens are used in more fields. Its scope of application includes: GPS, digi...view
  • Selection of the TFT LCD Touch ScreenSelection of the TFT LCD Touch ScreenMay 26, 2023In the information age of rapid development, LCD screens have been widely used in various fields, with TFT LCD touch screens with touch functionality being particularly prominent.Touch screens are use...view
  • Analysis of the Causes of Chromatic Aberration in TFT LCDAnalysis of the Causes of Chromatic Aberration in TFT LCDOctober 27, 2020Some customers will ask us why there is a chromatic aberration in the same TFT LCD screen? The so-called chromatic aberration of a TFT LCD screen means that when two LCDs of the same model are placed ...view
  • How the TFT display worksHow the TFT display worksDecember 9, 20221. How does TFT display work?How does TFT display work? TFT is the abbreviation of Thin Film Transistor, which generally refers to thin film liquid crystal display, but actually refers to ...view