2024.12.09
In the process of communicating with clients, it is essential for sales personnel to explain product solutions in a more accessible manner, while clients should also express their project requirements more clearly. Understanding the common parameters of displays is crucial. In this article, LP DISPLAY will take a look at the common LED display parameters, helping you gain a clearer understanding of the meanings behind the professional terms.
Pixel Pitch (mm), also known as dot pitch, refers to the distance between the centers of two pixels. It is commonly expressed as "P" followed by the distance, and sometimes emphasized as "PH" followed by the distance to highlight the high-definition characteristics of the display. This measurement is typically in millimeters and is closely related to resolution and screen size. For example, a P1.25 (also referred to as PH1.25) indicates that the pixel distance is approximately 1.25mm. A larger pixel pitch means fewer pixels per unit area, resulting in lower resolution, while a smaller pixel pitch provides higher image resolution and better visual quality. LP DISPLAY's spatial pixel technology can create more pixels per unit area, thereby enhancing resolution.
Pixel pitch is a key parameter that not only affects the display quality and viewing experience but also directly relates to performance in areas such as image processing and facial recognition. Generally speaking, displays with smaller pixel pitch are suitable for close viewing, such as in conference rooms, exhibitions, or indoor advertising, allowing viewers to get closer and enjoy clearer images. Larger pixel pitch is more appropriate for distant viewing, such as with outdoor large LED screens.
Resolution (mm) (WxH) is typically divided into module resolution and cabinet resolution. It is commonly used as a data reference for creating display content materials. Common resolutions include 2K, 4K, and 8K.
a. Module resolution
multiplying the number of horizontal pixel points by the number of vertical pixel points. For example, if a module has 32 horizontal pixel points and 16 vertical pixel points, then the resolution of that module would be 32x16.
b. Cabinet resolution
Cabinet resolution, also known as screen resolution, refers to the total number of pixel points in an entire cabinet comprised of multiple modules. For example, if a cabinet is arranged in a 4x4 module layout, and each module has a resolution of 16x8, then the overall resolution of the cabinet would be (16x4) x (8x4) = 64x32.
The resolution calculation formula is : Resolution= Cabinet Size ÷ Pixel Pitch. For example, the BluePro Video 54-inch Mega series product with a pixel pitch of P0.625 has a large cabinet size of 1200×675. Its resolution is calculated as 1200 ÷ 0.625 and 675 ÷ 0.625, resulting in a resolution of 1920x1080. This means that a single Mega cabinet with a pixel pitch of 0.625 can achieve 2K resolution, and simply arranging four cabinets in a 2x2 configuration can reach 4K resolution!
The higher the resolution of the screen, the more content it can display, and the finer the image quality. At the same time, the cost will also be higher.
Brightness (nits or cd/m²) refers to the intensity of light emitted per unit area of the display screen. Different scenarios have varying requirements for brightness, with outdoor brightness typically being higher than indoor brightness. For displays, higher brightness is not always better; there needs to be an appropriate limit. For example, the maximum brightness of outdoor LED displays is 6,500 cd/m², and if it is adjusted to 7,000 cd/m², it may exceed its tolerance, potentially leading to failures. It's akin to tire pressure; if a tire can only withstand 240 kPa but is inflated to 280 kPa, there may be no immediate issue, but over time, it could result in serious problems like a blowout.
Indoor：600~1,200cd/㎡
Semi-outdoor：>2,000cd/㎡
Outdoor：>4,000cd/㎡
The above data is for reference only. The professional team at LP DISPLAY will recommend the products that best meet your needs based on the actual conditions of the project.
The speed at which the display updates images within a given time (1 second) is referred to as the Frame Rate (Hz). Common frame rates include 30Hz, 50Hz, and 60Hz. The videos we watch are composed of frames, similar to a flip book, where the process of changing images is called frame changing. For example, if a motion is displayed through 20 images in one second, the frame rate of that video is 20Hz. A higher frame rate leads to a stronger sense of image continuity for the viewer, resulting in a more comfortable viewing experience.
Frame rate is often confused with refresh rate. Although both are measured in hertz (Hz), there is a significant difference between them. The refresh rate refers to the number of times a single LED on the screen turns on and off in one second, with common refresh rates being 1920Hz, 2880Hz, and 3840Hz, among others. Typically, a higher refresh rate also means better image quality. The level of refresh rate is determined by the LED's driver chip, so it is essential to consider the selected refresh rate when choosing an LED display. LED displays with a lower refresh rate may experience a ripple effect when filmed with a mobile phone, while high refresh rate screens do not have this issue. In summary, frame rate mainly pertains to the video source, while refresh rate is related to the display screen.
After a few minutes of simple understanding, do you have a clearer insight into the parameters of LED displays? LP DISPLAY is dedicated to helping customers choose the LED displays that best meet their needs. Stay tuned and follow us for our next content!
