As technology evolves rapidly, LED displays have integrated themselves into various aspects of our everyday lives. They are seen everywhere, from advertising billboards to televisions in homes and large projection screens used in conference rooms, showcasing an ever-expanding range of applications.
For individuals who are not experts in the field, the technical jargon associated with LED displays can be quite challenging to grasp. This article aims to demystify these terms, providing insights to enhance your understanding and utilization of LED display technology.
1. Pixel
In the context of LED displays, each individually controllable LED light unit is referred to as a pixel. The pixel diameter, denoted as ∮, is the measurement across each pixel, typically expressed in millimeters.
2. Pixel Pitch
Often referred to as dot pitch, this term describes the distance between the centers of two adjacent pixels.
3. Resolution
The resolution of an LED display indicates the number of rows and columns of pixels it contains. This total pixel count defines the information capacity of the screen. It can be categorized into module resolution, cabinet resolution, and overall screen resolution.
4. Viewing Angle
This refers to the angle formed between the line perpendicular to the screen and the point at which the brightness reduces to half of the maximum brightness, as the viewing angle changes horizontally or vertically.
5. Viewing Distance
This can be classified into three categories: minimum, optimal, and maximum viewing distances.
6. Brightness
Brightness is defined as the amount of light emitted per unit area in a specified direction. For indoor LED displays, a brightness range of approximately 800-1200 cd/m² is suggested, while outdoor displays typically range from 5000-6000 cd/m².
7. Refresh Rate
The refresh rate indicates how many times the display refreshes the image per second, measured in Hz (Hertz). A higher refresh rate contributes to a stable and flicker-free visual experience. High-end LED displays on the market can achieve refresh rates up to 3840Hz. In contrast, standard film frame rates are around 24Hz, meaning that on a 3840Hz screen, each frame of a 24Hz film is refreshed 160 times, resulting in exceptionally smooth and clear visuals.
8. Frame Rate
This term indicates the number of frames displayed per second in a video. Due to the persistence of vision, when the frame rate reaches a certain threshold, the sequence of discrete frames appears continuous.
9. Moire Pattern
A moire pattern is an interference pattern that can occur when the spatial frequency of the sensor’s pixels is similar to that of the stripes in an image, resulting in a wavy distortion.
10. Gray Levels
Gray levels indicate the number of tonal gradations that can be displayed between the darkest and brightest settings within the same intensity level. Higher gray levels allow for richer colors and finer details in the displayed image.
11. Contrast Ratio
This ratio measures the difference in brightness between the brightest white and the darkest black in an image.
12. Color Temperature
This metric describes the hue of a light source. In the display industry, color temperatures are categorized into warm white, neutral white, and cool white, with neutral white set at 6500K. Higher values lean towards cooler tones, while lower values indicate warmer tones.
13. Scanning Method
Scanning methods can be divided into static and dynamic. Static scanning involves point-to-point control between the driver IC outputs and pixel points, while dynamic scanning uses a row-wise control system.
14. SMT and SMD
SMT stands for Surface Mounted Technology, a prevalent technique in electronic assembly. SMD refers to Surface Mounted Devices.
15. Power Consumption
Typically listed as maximum and average power consumption. Maximum power consumption refers to the power draw when displaying the highest gray level, while average power consumption varies based on the video content and is generally estimated as one-third of the maximum consumption.
16. Synchronous and Asynchronous Control
Synchronous display means that the content shown on the LED screen mirrors what is displayed on a computer CRT monitor in real-time. The control system for synchronous displays has a maximum pixel control limit of 1280 x 1024 pixels. Asynchronous control, on the other hand, involves a computer sending pre-edited content to the display’s receiving card, which then plays the saved content in the specified sequence and duration. The maximum control limits for asynchronous systems are 2048 x 256 pixels for indoor displays and 2048 x 128 pixels for outdoor displays.
Conclusion
In this article, we have explored key professional terms related to LED displays. Understanding these terms not only enhances your comprehension of how LED displays operate and their performance metrics but also aids in making well-informed choices during practical implementations.
Cailiang is a dedicated exporter of LED displays with our own Manufacturer factory. Should you wish to learn more about LED displays, please do not hesitate to contact us!
Post time: Jan-16-2025
