The necessity of TFT LCD display aging test!
In the production process of electronic products, the high-temperature aging test of products is an important test process to improve product reliability and ensure stable performance of products under extreme conditions. Electronic products, whether they are components, semi-finished products, or complete machines, or equipment, need to be tested and aged. Testing and aging are not the same concept. Perform a functional test before aging. After almost all electronic products are manufactured, they become complete products or parts, which have value in use. However, after the products are used, some electronic components will have various problems, and most of these problems occur at the beginning. Within a few hours to tens of hours, in view of this, the aging and testing of electronic products are stipulated, and the use status of similar or equivalent products is imitated. Through aging and testing, the problems of the products are exposed in advance, and the problematic products are eliminated on the production line. The products that leave the factory are no problem products to ensure that the products sold to users are reliable. This is what aging testing is about. The aging test is divided into component aging and complete machine aging. Especially for newly developed products, it is necessary to test new components or new machine performance, and the aging test index is higher. Aging causes product defects to be exposed on the production line, such as the reliability of solder joints and components. Products may have various defects or defects in design, material and process. Aging test is an effective means to find these problems. Aging test makes the product performance enter the stable range before leaving the factory, reducing the repair rate. This is the necessity of aging test. TFT LCD aging inspection is a very important link in product quality control. TFT LCD products can improve their performance after aging, and help to stabilize the performance of later applications. TFT LCM aging inspection is a countermeasure based on the characteristics of the product failure rate curve, that is, the bathtub curve, so as to improve the reliability of the product. TFT LCD screen aging methods include constant current aging and constant voltage aging. A constant current source means that the current is constant at any time. A current with a questionable frequency is not a constant current. That is alternating or pulsating current. An AC or pulsating current source can be designed so that the effective value is stable and constant, but this kind of power supply cannot be used as a 'constant current source'. Constant current aging is the most suitable TFT LCD screen current operating characteristics, and it is the most scientific TFT LCD screen aging method. Over-current impact aging is also an aging method newly selected by the manufacturer. By using a constant current source with adjustable frequency and current for this type of aging, it is expected to distinguish the quality and expected life of TFT mobile phone LCD display in a short time, and it can Picks out a lot of dangerous LCD displays that conventional aging can't pick out. So what aging content is included in the TFT LCD screen: 1. TFT LCD display white screen inspection time is not less than 8 hours 2. Monochrome, gray scale change inspection is not less than 8 hours 3. Video and text effect inspection is not less than 8 Hours 4. White screen, red, green, blue, gray scale refresh frequently 5. Current and voltage adjust the corresponding parameters according to the aging operation instructions. TFT mobile LCD screen display'>TFT LCD screenLCD display mobile phone LCD for Samsung display manufacturers'>LCD for Samsung display manufacturers
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