Який стандарт оцінки виробників РК? Вибір постачальника РК-екранів

  What is the grading standard of LCD manufacturers? Many people have been vague about the grading of LCD screens, because they have not seen a unified standard. In fact, the grading standards of each manufacturer are different, so I will give you a detailed introduction today. The following LCD manufacturer classification standards.Then the basis of LCD manufacturers to distinguish LCD screen grades:

  According to the quality of the LCD panel, it can be divided into three levels: A, B, and C, and the basis for the classification is the number of dead pixels. Of course, some manufacturers will make more detailed distinctions of LCD screen specifications, such as "A plus ", "A-", "B plus ", etc.;

  First, let's introduce a concept: LCD screen dead pixels

  We all know that the LCD screen can be subdivided into each sub-pixel, and the sub-pixel can display black and white and three primary colors of red, green and blue. The dead pixel of the LCD screen means that no matter what the image displayed on the LCD screen is, a certain sub-pixel point on the display screen will always display the same color. Dead pixels can be roughly divided into two categories. One is that the sub-pixels are always black no matter how the screen is, which is called a dark point, and the other is that there is always a bright spot on the screen as long as the screen is turned on, which is called a bright spot. Generally speaking, screen dead pixels cannot be repaired, and can only be repaired by replacing the entire screen.

  Knowing the concept of LCD screen dead pixels, let's briefly introduce the division of LCD screen levels:

  A plus level LCD screen: LCD screen without any dead pixels is called A plus level LCD screen. Through the professional testing software test, there are no bright spots in the power-on state, no dark spots after the display screen, and the display screen is stable and smooth. A plus grade LCD screen is the highest quality LCD screen, suitable for display fields with extremely high display quality requirements, such as LCD monitors, vehicle displays, medical displays, etc.

  A-level LCD screen: The total number of dead pixels does not exceed 3, and there can only be one bright spot at most, and the bright spot is not in the central area of the screen, we call it A-class LCD screen. The screen display is still high-quality and smooth, and there is generally no obvious dead pixel feeling during use. General application and LCD TV, home appliance display and other fields.

 B-level LCD screen: The total number of dead pixels does not exceed 5, and the bright spot can only have 2 at most, and the bright spot is not in the central area of the screen, which is called a B-level LCD screen. The brightness of the screen is relatively uneven, and the color saturation is relatively insufficient. Most of the cheap LCD monitors use this type of B-level panel, and the cost is relatively economical and cheap.

  C-level LCD screen: In addition to the dead pixel of the LCD screen, the screen with line defects is called a C-level LCD screen. A line defect refers to a bright line or a dark line on the screen, which is a display defect formed by a short circuit or an open circuit in the screen. The image color reproduction ability of the c-class LCD screen is poor, and the appearance may even be damaged. It is basically not used in large-screen products. Most of the LCD panels that are cut into small areas are used in small-sized display fields.

  The grading of products by LCD panel manufacturers varies from place to place: Korean manufacturers, below 3 are grade A; Japanese manufacturers, below 5 are grade A; Taiwan manufacturers, below 8 are grade A. The nominal grade standard of mainstream liquid crystal display products is: AA grade, and the LCD display without any dead pixels is AA grade; A grade: less than 3 dead pixels, of which no more than one bright spot, and the bright spot is not in the central area of the screen; B Level: 3 dead pixels or less, including no more than two bright spots, and the bright spots are not in the central area of the screen.

  Our common original LCD screen manufacturers on the market will grade their products, the grades from high to low are as follows:

РК-екран AUO: Z-P-N-V-B

CMO Chi Mei LCD: A-A-(A-)-B

РК-екран HSD HannStar: A-NI-YO-V2

РК-екран Innolux: E-G1-G3-G5-G7-GE