Firstly, the inspection standards for LCD have not yet involved national standard parameters, and are all based on the LCD industry standards to meet the basic requirements of customers. There are more A+aerospace and military grade products with relatively high quality requirements and high costs.
There are more A industrial grade products, such as power systems, automotive instruments, electronic instruments, medical equipment, etc. There are many household items, such as air conditioning remote controllers, POS machines, washing machines, electric vehicles, and high requirements for cost control.
According to the quality requirements of different customers, the inspection standards will also vary accordingly. Environmental requirements: LCD finished product inspection requires the use of 2 40W fluorescent lamps, and inspectors should be 1 meter away from the lamps.
The ambient temperature should be controlled between 10-32 ℃, and the humidity should be controlled at 60 ± 15% RH. Inspection method: 1. During inspection, the naked eye should be 30cm away from the LCD product. The product should be displayed in its correct mode and driven conditions;
2. LCD screen full transparency products need to be checked for appearance under normal conditions after adding backlight;
3. LCM light guide plate products must undergo a visual inspection when illuminated;
4. All COG products must undergo telecommunication inspection after surface mounting. The testing frequency is 80HZ, and the voltage needs to be adjusted within the range of 0.6V based on Vop after pressing 5 on the tester;
5. TN products are inspected in scanning state: Leak, high current, and other telecommunications items are inspected in full display state;
Inspection level: A, B, and C appearing in the standard are the inspection levels of the product, with A being the strictest, B being the second level, and C being relatively loose. Please refer to the Technical Department's "Product Inspection Specification" for the product inspection levels applicable to different products. Common appearance defects include: black spots, white spots, dirt, scratches, internal scratches, pinholes, poor surface mount, external scratches, damage, glass residue, poor size, poor sealing, poor positioning, bubbles inside the box, poor border glue, rainbow (but within the area), poor background color, poor protective layer, poor PIN installation, poor screen printing, poor FPC, TCP, poor welding, and misalignment of resistance components. Common functional defects include: Leaks, Short, excessive current, poor response, viewing angle defects, multiple displays, incomplete displays, thick and thin characters, uneven display colors, display black spots, white spots (within the visible area), backlight failure, dead lights, etc.
The following are some of the standards for stains:
All raw materials for LCD modules have a lifespan limit, which is why there is a phenomenon of uneven prices for LCD screens in the market.
For example, the chip lifespan of a LCD module is 80000 hours, but it should be noted that this 80000 hours refers to the IC being produced within one year of its production date to ensure that it reaches its lifespan. Otherwise, its lifespan will be affected.
The above are the basic inspection standards for our LCD industry. In daily negotiations, it is important to communicate well between both parties to avoid inconvenience in our future work!!
LCD has a complete quality system, and each LCD screen undergoes strict 72 hour aging before leaving the factory. The company is equipped with a series of testing tools such as high and low temperature impact box, electrostatic tester, salt spray test box, drop tester, high-frequency vibration table, voltage impactor, etc., allowing you to use them with confidence!
Firstly, the inspection standards for LCD have not yet involved national standard parameters, and are all based on the LCD industry standards to meet the basic requirements of customers. There are more A+aerospace and military grade products with relatively high quality requirements and high costs.
There are more A industrial grade products, such as power systems, automotive instruments, electronic instruments, medical equipment, etc. There are many household items, such as air conditioning remote controllers, POS machines, washing machines, electric vehicles, and high requirements for cost control.
According to the quality requirements of different customers, the inspection standards will also vary accordingly. Environmental requirements: LCD finished product inspection requires the use of 2 40W fluorescent lamps, and inspectors should be 1 meter away from the lamps.
The ambient temperature should be controlled between 10-32 ℃, and the humidity should be controlled at 60 ± 15% RH. Inspection method: 1. During inspection, the naked eye should be 30cm away from the LCD product. The product should be displayed in its correct mode and driven conditions;
2. LCD screen full transparency products need to be checked for appearance under normal conditions after adding backlight;
3. LCM light guide plate products must undergo a visual inspection when illuminated;
4. All COG products must undergo telecommunication inspection after surface mounting. The testing frequency is 80HZ, and the voltage needs to be adjusted within the range of 0.6V based on Vop after pressing 5 on the tester;
5. TN products are inspected in scanning state: Leak, high current, and other telecommunications items are inspected in full display state;
Inspection level: A, B, and C appearing in the standard are the inspection levels of the product, with A being the strictest, B being the second level, and C being relatively loose. Please refer to the Technical Department's "Product Inspection Specification" for the product inspection levels applicable to different products. Common appearance defects include: black spots, white spots, dirt, scratches, internal scratches, pinholes, poor surface mount, external scratches, damage, glass residue, poor size, poor sealing, poor positioning, bubbles inside the box, poor border glue, rainbow (but within the area), poor background color, poor protective layer, poor PIN installation, poor screen printing, poor FPC, TCP, poor welding, and misalignment of resistance components. Common functional defects include: Leaks, Short, excessive current, poor response, viewing angle defects, multiple displays, incomplete displays, thick and thin characters, uneven display colors, display black spots, white spots (within the visible area), backlight failure, dead lights, etc.
The following are some of the standards for stains:
All raw materials for LCD modules have a lifespan limit, which is why there is a phenomenon of uneven prices for LCD screens in the market.
For example, the chip lifespan of a LCD module is 80000 hours, but it should be noted that this 80000 hours refers to the IC being produced within one year of its production date to ensure that it reaches its lifespan. Otherwise, its lifespan will be affected.
The above are the basic inspection standards for our LCD industry. In daily negotiations, it is important to communicate well between both parties to avoid inconvenience in our future work!!
LCD has a complete quality system, and each LCD screen undergoes strict 72 hour aging before leaving the factory. The company is equipped with a series of testing tools such as high and low temperature impact box, electrostatic tester, salt spray test box, drop tester, high-frequency vibration table, voltage impactor, etc., allowing you to use them with confidence!
