What is an A-grade screen? What are the standards for A-grade LCD screens?

In the LCD display market, A-grade screens have always been considered synonymous with high quality. Whether used in high-end electronic products or professional display equipment, A-grade LCD screens are highly favored for their superior performance and extremely low defect rate. However, many users are still not very familiar with the specific definition and standards of A-grade screens. This article will explain the definition of A-grade screens and the standards for A-grade LCD screens in detail, and combine the professional knowledge of the LEEHON brand to help you better understand this high-end display technology.

I: What is an A-grade screen?

An A-grade screen is one of the standards for classifying LCD monitor screen grades, representing the highest quality level achieved after rigorous testing during the production process. The core definition of an A-grade screen is: no obvious bright spots, dark spots, or color patches, and almost no defects that can be detected by professional testing software. This means that A-grade screens are almost perfect in visual effect, providing clear, stable, and color-accurate images.

Standards for Grade A LCD Screens

Grade A LCD screens represent the highest industry standard, with the following specific requirements:
No bright spots, no dark spots, no defects: Grade A screens require zero or extremely low numbers of dead pixels per million pixels (some brands specify ≤1 discontinuous dark spot).

High brightness uniformity: The brightness difference between the center and corners (ΔL/L) ≤15%, ensuring overall visual consistency without noticeable shadows or yellowing.

Good color consistency: ΔE value <2, making color differences virtually indistinguishable to the naked eye.

Stable electrical performance: Response time, contrast ratio, Gamma curve, etc., all conform to the specifications.

Complete factory packaging: Original factory labels are complete, with ESD anti-static packaging, shockproof pads, and batch traceability codes.

Long lifespan, suitable for long-term supply: Backlight lifespan, signal interface, and power supply characteristics all meet standards, supporting stable supply for over 5 years.

II: Grade A LCD Screens from the LEEHON Brand

LEEHON Technology, as a professional LCD display driver solution provider, has established deep partnerships with many leading global LCD panel manufacturers. LEEHON’s A-grade LCD screens strictly adhere to the aforementioned standards, ensuring the highest quality for every screen. In high-end applications such as industrial, medical, and automotive applications, LEEHON’s A-grade screens, with their superior performance and stability, have become the preferred choice for many high-end equipment manufacturers.

III: FAQ

Q1: What is the difference between an A-grade screen and an A+ screen?

A: An A+ screen is a higher standard version of an A-grade screen, typically requiring fewer bright and dark spots, and in some cases, approaching a perfect screen. A-grade screens allow for a very small number of bright or dark spots, but the number is strictly controlled to within three.

Q2: How much more expensive are A-grade screens than B-grade screens?

A: A-grade screens are typically 10% to 30% more expensive than B-grade screens. This is because A-grade screens undergo more rigorous testing and screening during the production process, resulting in higher quality.

Q3: What are the application scenarios for LEEHON’s A-grade screens?

A: LEEHON’s A-grade screens are widely used in high-end fields such as industrial control terminals, medical instruments, automated monitoring equipment, and high-end automotive and avionics display systems.

Q4: How to determine if an LCD screen is a Grade A screen?

A: You can make a preliminary judgment by checking the label and packaging, conducting power-on tests, brightness and color difference tests, and observing backlight consistency. Grade A screens usually have complete original manufacturer barcodes, batch numbers, production dates, and inspection stickers.

Q5: Can Grade B screens be used in high-end equipment?

A: Although Grade B screens have a few acceptable defects, they are not suitable for high-end equipment with extremely high display quality requirements, such as medical imaging or aerospace display systems. These devices require Grade A screens to ensure stability and reliability.

Conclusion

Grade A screens represent the highest standard in LCD monitor screen grades, signifying a high-quality display effect with no obvious bright spots, dark spots, or color patches. The standards for Grade A LCD screens are extremely stringent, covering multiple aspects from no dead pixels to high brightness uniformity, color consistency, and electrical performance stability. LEEHON brand, with its professional technology and strict quality control, provides the market with high-quality LCD screens that meet Grade A standards, satisfying the stringent display quality requirements of high-end fields such as industry, medical, and automotive.