Service Support

Frequently Asked Questions

Terms and Conditions

FAQ

Q Mura's judgment method 2025-03-17 13:08:41.371
A
• Mura is typically judged under a 50% Graypattern (L127) grayscale image;
• Mura judgment mainly adopts NDFilter or limit sample (special cases).
Q On the determination method of ND filter usage 2025-03-17 13:08:29.278
A
• When checking and judging, the distance between the ND Filter and the LCD product screen should be 3CM~5CM;
• When using the ND Filter to judge Mura or a certain defect, the detection distance between the operator's eyes and the LCD product should be at least 6CM~80CM.
Q The function of an ND filter 2025-03-17 13:08:13.991
A
Its function is to filter light. The light filtering effect is non-selective; the ability to reduce light of various wavelengths is equal and uniform, only weakening the light and not affecting the color of the original object, thus enabling the true reproduction of scene contrast.
Q What is a liquid crystal bright spot? 2025-03-17 13:07:36.046
A
Initially, during heating, the organic compound forms a turbid liquid with fluidity similar to water, but exhibiting optical birefringence. This temperature is called the melting point. As the temperature continues to rise, when the compound suddenly becomes an isotropic, transparent liquid at a higher temperature, the corresponding transition temperature is called the clearing point; commonly represented as Td or Ti. Between the melting point and the clearing point, the substance is an anisotropic melt, forming a liquid crystal.
Q Causes of LCD bright spots 2025-03-17 13:07:14.992
A
Clear bright spots in LCDs often occur in outdoor applications, which frequently malfunction due to high temperatures. When using wide-temperature LCD products, it is crucial to monitor the screen's surface temperature to ensure it does not exceed the product Specification.
Q What is power sequencing? 2025-03-17 13:06:42.480
A
It is a circuit composed of the most basic logic gates plus a feedback logic loop (output to input) or a combination of devices. The most essential difference from combinational circuits is that sequential circuits have memory functions.
Q Characteristics of Power Sequencing 2025-03-17 13:06:28.323
A
The output depends not only on the input value at that time, but also on the past state of the circuit; it is similar to a circuit with energy storage elements such as inductors or capacitors. Triggers, latches, counters, shift registers, and memory are typical components of sequential circuits. The state of a sequential logic circuit is memorized and represented by storage circuits.
Q Common problems and causes in each stage of power sequencing 2025-03-17 13:05:33.166
A
• Time1 refers to the power-on time of VDD IN. Too fast a power-on time can cause the PMIC or Tcon IC to burn out, resulting in a black or white screen issue.
• Time2 refers to the input time of the power-on signal. An excessively long signal input time or interruption during the process can lead to the BIST screen.
• Time3 refers to the input time of the backlight power supply. A continuously lit backlight may cause abnormal screen display issues to be detected upon power-on.
• Time4 refers to the power-off time of the backlight power supply. A continuously lit backlight may cause abnormal screen display issues to be detected upon power-off.
• Time5 refers to the signal power-off time during shutdown. A fast backlight shutdown can cause a black screen, while a slow shutdown can cause a white or gray screen flicker.
• Time6 refers to the VDD OFF power-off time during shutdown. Too fast or too slow a power-off speed can cause black screen or flicker abnormalities.
• Time7 refers to the time from complete shutdown to the next power-on. Issues such as black or white screen abnormalities are more easily encountered during the period from shutdown to the next power-on.
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Terms and Policies

I. Delivery Service
1. Mainland China Customers: For most products, shipment can be arranged on the same day of receiving payment; for some products, shipment can be arranged within three days of receiving payment (excluding holidays).
2. Customers outside Mainland China: For most products, logistics, customs declaration, and other procedures can be arranged within three days of receiving payment; for some products, arrangement can be made in the second week after receiving payment (excluding holidays).

II. After-sale Service
1. After the goods arrive at their destination, the consignee should check if the goods are intact. If there are any abnormalities, please contact our company immediately and take photos and videos as evidence.
2. All goods are accepted according to BOE's original factory IIS standard. If after-sales service is required, please send the details of the defective goods to our company's email address within the warranty period. Our company will confirm and then send them together with the goods.
3. Please keep the LCD screen clean. Our company does not provide warranty for situations such as missing, replaced, or damaged original module labels, no original film, cut ears, scratches on the film, or non-functional problems after installation.
4. For broken screens, please keep and provide the corresponding outer carton label.
5. The shipping cost for normal after-sales service will be borne by both parties; the paid after-sales service fee will be borne by the buyer.

III. Warranty Policy
1. Enjoy BOE's original factory warranty of 12 months. Among them, 15-inch LCD screens can enjoy BOE's original factory warranty of 18 months. This time is based on the original factory production time on the LCD screen.
2. If the product you purchased has exceeded the warranty period, you can also obtain our assistance by purchasing our paid services.

IV. Technical/After-sales Support
Contact Email: sales@px-lcd.com

Technical Support

Shanghai Pohang CMC Tech Co., Ltd. was founded in September 2003. Our company is a professional industrial control and medical LCD screen supplier. The registered capital is 5 million yuan. We have offices in Shanghai, Shenzhen and other places. Mainly for global customers to provide BOE (B0E) brand industrial LCD, medical LCD. Products are widely used in medical displays, industrial displays, reinforced displays, man-machine interfaces, interactive game consoles and other products.
The company can distribute worldwide and accept overseas remittances, including: RMB, Hong Kong dollars, US dollars, British pounds, Canadian dollars, Australian dollars, Japanese yen, New Zealand dollars, euros, Singapore dollars, Swiss francs and Thai baht.
Companies adhering to the "high quality, excellent service" business philosophy, with first-class products and first-class service, to build the company's core competitiveness, to provide customers with professional LCD products.

Technical Support
After-sales service

After-sales service

Shanghai Pohang CMC Tech Co., Ltd. was founded in September 2003. Our company is a professional industrial control and medical LCD screen supplier. The registered capital is 5 million yuan. We have offices in Shanghai, Shenzhen and other places. Mainly for global customers to provide BOE (B0E) brand industrial LCD, medical LCD. Products are widely used in medical displays, industrial displays, reinforced displays, man-machine interfaces, interactive game consoles and other products.
The company can distribute worldwide and accept overseas remittances, including: RMB, Hong Kong dollars, US dollars, British pounds, Canadian dollars, Australian dollars, Japanese yen, New Zealand dollars, euros, Singapore dollars, Swiss francs and Thai baht.
Companies adhering to the "high quality, excellent service" business philosophy, with first-class products and first-class service, to build the company's core competitiveness, to provide customers with professional LCD products.