2024.12.10
In the previous article, 5 minutes to know about the meaning of LED display parameters(part one), we introduced some basic parameters of LED displays. Today, LP DISPLAY will continue to guide you in understanding the meanings of other basic parameters.
Gray level, also known as Gray Scale (bit), refers to the number of technical processing levels that a display can achieve between the darkest and brightest states at the same brightness level, indicating how many increments can be divided from the darkest to the brightest. The commonly referenced 14-bit is often used for high dynamic range (HDR) images to provide richer colors and details. Using a 14-bit binary representation, the range is 2^14 = 16,384, which means the display can be divided into 16,384 increments from the darkest to the brightest. The higher the gray level, the richer and more vibrant the colors. The levels of 12/13/14/15/16 bits each double in value, meaning that 13-bit is twice as much as 12-bit.
High gray levels are widely used in fields such as image processing, medical imaging (e.g., X-rays), surveillance video, and digital photography. In these applications, gray level information helps detect and analyze details within the images.
Contrast refers to the ratio between the maximum brightness and the background brightness of an LED display under a certain environmental illumination. For example, if a display has a maximum brightness of 1,000 cd/m² and a minimum brightness of 1 cd/m², its contrast ratio would be 1,000:1.
To display text and images with uniform brightness, unaffected by surrounding light, the screen should have sufficient contrast. High contrast can make images more vibrant and eye-catching, creating a visual impact that is suitable for emphasizing a particular subject or composition. Low contrast is often used to create a softer visual effect, which is appropriate for serene and calming scenes.
For LED displays, a contrast ratio of over 5,000:1 is preferred for optimal performance. However, excessively high contrast can lead to a loss of detail in images, especially in highlight or shadow areas. Therefore, when adjusting the contrast, it is important to consider the preservation of image details.
Color temperature (Color Temp) is a scale that indicates the color of light emitted by a source, measured in Kelvin (K). Different color temperatures evoke different sensations and spatial atmospheres. The adjustable color temperature range for LED displays typically falls between 3,000K and 9,500K. Lower color temperatures (e.g., 3,000K) tend to produce warm yellow light, while higher color temperatures (e.g., 9,500K) emit cool blue-white light.
Many LED displays are factory-set to a standard color temperature of 6,500K, which is relatively close to natural light. This temperature is suitable for most application scenarios, such as outdoor and indoor advertising, stages, and events.
Viewing angle typically refers to the image quality, color retention, and brightness consistency of a monitor or screen at different angles. It emphasizes how clearly and realistically the image can be observed at various angles. This is often indicated by two values, such as 160°/160°, representing the maximum viewing angles in the horizontal and vertical directions. A wide viewing angle ensures consistent brightness and color across multiple angles, preventing color distortion or brightness reduction when viewed from the side.
IP Protection Level: Composed of "IP" followed by two characteristic digits, IPXX—where the first "X" represents the dust protection level, ranging from 0 to 6; and the second "X" represents the water protection level, ranging from 0 to 8.
Understanding the meaning of the parameters of LED displays is crucial for selecting the right product. I hope this article can help you interpret the specifications more easily.
