1. LED: Short for Light Emitting Diode, in the LED display industry, it specifically refers to LEDs that emit light in the visible spectrum.
2. Pixel: The smallest light-emitting unit in an LED display, similar in meaning to a pixel on a standard computer monitor.
3. Pixel Pitch: The distance between the centers of two adjacent pixels. The smaller the pitch, the shorter the viewing distance. The industry often uses "P" to represent pixel pitch.
4. Pixel Density: Also known as dot matrix density, it usually refers to the number of pixels per square meter of the display.
5. LED Module (Unit Board): Composed of several display pixels, it is structurally independent and is the smallest unit that can form an LED display. Common specifications include 8×8, 8×7, etc., and they have defined circuits and installation structures that enable display functionality. Simple assembly can achieve the function of a display.
6. DIP: Short for Dual In-Line Package, referring to a method of assembly where components are inserted into PCB holes.
7. SMD/SMT: Represent Surface Mounted Technology and Surface Mounted Device, respectively, which are popular technologies and processes in the electronics assembly industry.
8. LED Display: A display screen composed of an array of LED devices, controlled in a specific manner.
9. Through-Hole (Insert Lamp): Refers to the process where DIP-packaged lamps are inserted through the PCB and soldered to fill the lamp holes with solder. The modules made by this process are called through-hole modules, with the advantages of high brightness and good heat dissipation but lower pixel density.
10. Surface Mount Module: Also known as SMT, where SMT-packaged lamps are soldered onto the surface of the PCB without the lamp legs passing through the PCB. This process's modules have the advantages of good display quality and high pixel density, suitable for indoor viewing, but with lower brightness and poorer heat dissipation.
11.The 3-in-1 refers to the integration of three different color LED chips (red, green, and blue) into a single package, where they appear as one point when viewed up close.
12.The 3-along-1 refers to the arrangement where three independently packaged LEDs (red, green, and blue) are placed in close proximity to each other, forming a pixel point while maintaining their individual packaging.
13. Dual-Color, Pseudo-Color, and Full-Color Displays: Composed of LEDs in different colors. Dual-color uses red and green or yellow-green, pseudo-color uses red, yellow-green, and blue, and full-color uses red, pure green, and pure blue.
14. Luminance: Refers to the light intensity emitted per unit area by the LED display, measured in cd/m², i.e., the light intensity emitted by one square meter of the display.
15. Brightness Levels: The manual or automatic adjustment levels of the entire display's brightness, ranging from the lowest to the highest.
16. Gray Levels: Refers to the technical processing levels from the darkest to the brightest at the same brightness level on the LED display, described in various formats.
17. Maximum Brightness: Refers to the state of the LED display's primary colors at maximum brightness and maximum gray level under certain ambient lighting.
18. Moiré Pattern: Refers to the regular wave patterns that appear on the screen when photographing a full-color LED display in operation, known in physics as the "Moiré pattern."
19. PCB: Short for Printed Circuit Board, the base on which the circuits of electronic devices are printed.
20. Unit Board Specifications: Refers to the dimensions of the unit board, usually expressed as length multiplied by width in millimeters (e.g., 48×244).
21. Module (Unit Board) Resolution: Refers to the number of pixels on a unit board, usually expressed as the number of rows multiplied by the number of columns of pixels (e.g., 64×32).
22. BOM: Short for Bill of Materials, a list of materials required for manufacturing.
23. White Balance: The balance of brightness ratios among the RGB three colors, with white balance adjustment referring to adjusting the brightness ratios and white coordinates of the RGB colors.
24. Contrast Ratio: The ratio of maximum brightness to background brightness of the LED display under specific ambient lighting.
25. Color Temperature: Refers to the temperature of a black body that emits light of a similar color to a light source; the temperature of the black body is the color temperature of the light source.
26. Color Difference: The observable differences caused by varying viewing angles and spectral distributions among LEDs made from different materials when combining red, green, and blue LEDs to produce various colors on the display.
27. Frame Rate: The frequency at which the LED display's image information is updated per unit of time, usually around 60 Hz, almost imperceptible to the human eye.
28. Refresh Rate: The frequency at which the LED display's image is repeated per unit of time. The higher the refresh rate, the finer the image.
29. Viewing Angle: The angle at which the brightness drops to half of the normal brightness of the LED display. The viewing angle refers to the angle between the direction where the screen content can be just seen and the screen's normal line. The optimal viewing angle is the angle between the clearest viewing direction where the screen content is visible without color distortion and the normal line.
30. Optimal Viewing Distance: The best distance from the screen where the display content can be seen clearly, completely, and without color distortion.
31. Dead Pixels: Refers to pixels that do not match the control requirements in their lighting state, categorized into three types: blind spots (also known as dead spots), constantly bright spots (or dark spots), and flickering spots.
32. Static Driving: Refers to the "point-to-point" control method between the drive IC's output pin and the pixel. Scanning driving, on the other hand, uses "point-to-column" control between the drive IC's output pin and the pixel, requiring a row control circuit. Static driving does not require a row control circuit, is more expensive, but has better display effects, stability, and less brightness loss; scanning driving is cheaper but has worse display effects and greater brightness loss.
33. Constant Current Driving: Refers to outputting a constant designed current value within the drive IC's working environment. Constant voltage driving outputs a constant designed voltage value within the drive IC's working environment.
34. Aspect Ratio of LED Displays: The aspect ratio of LED displays is usually determined by the display content for text and graphics screens. For video screens, the aspect ratio is usually 4:3 or close to 4:3, with the ideal being 16:9.
35. Number of Points Controlled by a Set of Control Systems: For communication screens, an A card controls 1024×64 for single-color and dual-color screens, while a B card controls 896×512 for single-color and 896×256 for dual-color screens. For DVI dual-color screens, it controls 1280×768, and for DVI full-color screens, 1024×512.
36. Nonlinear Correction: Refers to performing a nonlinear function calculation on the digital signal output from the computer to obtain the signal required by the LED display, correcting the color distortion seen without correction.
37. Rated Operating Voltage: Refers to the voltage when the equipment is working normally. Operating voltage refers to the voltage value when the equipment is working normally within the rated voltage range. Power supply voltage is divided into AC and DC, usually AC power supply voltage is AC220V-240V, DC power supply voltage is generally 5VDC or 12V, and solar power supply is usually 12V.
38. Color Distortion: Refers to the visual difference perceived by the human eye when the same object is displayed in nature and on the monitor.
39. Synchronous System: Refers to the control system where the LED display content is synchronized with the computer monitor display. Asynchronous systems store the display data edited by the computer in the display control system, allowing the LED display to continue normal operation even after the computer is turned off.
40. Blind Spot Detection Technology: A technology that detects and reports blind spots (LED open circuits and short circuits) on the display through upper software and lower hardware.
41. Power Detection Technology: A technology that detects and reports the working status of each power supply on the display through upper software and lower hardware.
42. Brightness Detection: The process of detecting the ambient brightness of the LED display through a light sensor. Brightness adjustment is the operation of adjusting the display brightness based on the detection data.
43. Real Pixel: Refers to the 1:1 correspondence between the physical pixel count and the actual display pixel count of the LED display. Virtual Pixel refers to the 1:N (N=2, 4) correspondence between the physical pixel count and the actual display pixel count, allowing the display of twice or four times the image pixels of the actual pixels. Virtual pixels include software virtual, hardware virtual, 2x virtual, 4x virtual, 1R1G1B virtual, and 2R1G1B virtual.
44. Remote Control: Refers to the control method where the main control end and the controlled end are at different distances, including both LAN and long-distance space situations, suitable for cases where the customer's control position exceeds the direct control distance.
45. Optical Fiber Transmission: Converts electrical signals into optical signals and transmits them through transparent glass fibers. Ethernet cable transmission uses metal conductors for direct electrical signal transmission.
46. Transmission Distance: When the distance between the display and the control computer is less than 100 meters, Ethernet cable transmission is used. For distances greater than 100 meters but less than 500 meters, multi-mode fiber is used. For distances greater than 500 meters, single-mode fiber is used.
47. LAN Control: The control method where one computer controls another computer or external equipment within a local area network. Internet control achieves control within the INTERNET network through the controlled device's IP address.
48. DVI: Short for Digital Video Interface, an internationally recognized digital video signal interface. VGA, or Video Graphics Array, is an analog signal computer display standard proposed by IBM, with VGA interfaces being specialized interfaces for computer data output using the VGA standard.
49. Digital Signal: Refers to a signal with discrete amplitude values of 0 and 1, with circuits that process and control this signal called digital circuits.
50. Analog Signal: Refers to a signal with continuous amplitude values over time, with circuits that process and control this signal called analog circuits.
51. PCI Slot: An expansion slot based on the PCI local bus, the main expansion slot on the motherboard, achieving external functions of the computer through different expansion cards.
52. AGP Slot: An Accelerated Graphics Port, designed to transmit 3D graphics faster and more smoothly, using the computer's main memory to refresh the images displayed on the monitor, supporting various 3D graphics technologies.
53. GPRS: General Packet Radio Service, a bearer service developed on the existing GSM system for wireless communication; GSM stands for Global System for Mobile Communications, using digital communication technology and unified network standards. CDMA is a wireless communication technology based on spread spectrum technology.
54. GPRS Technology: Applied to LED displays, GPRS can use GPRS transceivers in mobile communication to control LED displays remotely.
