Post about "technical terms"

41: Under what circumstances use network cable? Ad wahat about fiber ?

When the distance between screen and control computer is less than 100M, we use network transmission lines; when the distance between them is less than 500M greater than 100M, we use multi-mode optical fiber; when the distance is greater than 500M or more, with the single-mode fiber;

42: What is a LAN control? What is the Internet control?

In the local area network controlled by a computer connected to another computer or external device on it, this control method is called LAN control; host controller is controlling the controlled computer by accessing the IP address Interner network, we called it the Internet control;

43: What is DVI? What is VGA?

DVI is the acronym for digital video interface.; It is now internationally accepted as a digital video signal interface;

The English name VGA is the display graphics array. It is the R, G, B video signals have three analog output interface;

44: What is a digital signal? What is a digital circuit?

Digital signal refers to signal amplitude are discrete values, the amplitude that is limited to a finite number of 0 and 1 values within the two; processing and control circuit of this signal is called digital circuit;

45: What is analog signal? What is analog?

Analog refers to the signal amplitude in time the value is continuous; processing and control circuit of this signal is called analog circuits;

46: What is a PCI slot?

PCI slot is based on the PCI local bus (Pedpherd Component Interconnect, Peripheral Component Interconnect) expansion slots;

PCI slot is a major expansion slot motherboard, expansion cards through the plug can be obtained with different current computer can achieve almost all the external features;

47: What is the AGP slot?

Accelerated Graphics Port. AGP is an interface specification that allows 3D graphics on personal computers in general faster display. AGP是一种设计用来更快，更平稳地传送3D图形的接口。 AGP is designed to faster and more smoothly transfer 3D graphics interface. 它使用普通个人电脑的主内存来刷新显示器显示的图像，支持纹理贴图，零缓冲和阿尔法混合等3D图形技术。 It uses an ordinary personal computer’s main memory to refresh the image display to support texture mapping, alpha blending of zero buffering and 3D graphics technology.

48: What is GPRS? What is GSM? 什么是CDMA? What is CDMA?

GPRS is General Packet Radio Service (GeneralPacketRadioService), is developed on the existing GSM system, a new carrier services, mainly for radio communication;

GSM is the European Committee for Standardization in 1992 launched a unified “GlobalSystemForMobileCommunication” standard acronym, which uses digital communications technology, a unified network standards, so that communication quality can be guaranteed, and can develop more new business for users.

CDMA (Code Division Multiple Access), based on spread spectrum technology, a new and sophisticated wireless communications technology;

49: GPRS technology on display useful there?

Mobile communications based on GPRS data networks, LED display our data through the GPRS transceiver for data communications, can achieve a small amount of point to point the remote off-site data! 达到远程控制的目的； To achieve the purpose of remote control;

50: What is RS-232 communication, what is the RS-485 communication, what is the RS-422 communications? Have any good?

RS RS

51: What is ARM system?  For the LED industry, what use is it?

ARM (Advanced RISC Machines), ARM-based company is specialized in the RISC (reduced instruction set computer) technology, chip design and development company, either the name of a company that can also be considered a generic term for a class of microprocessors, but also can be considered a technical name. CPU to contain the core of this technology to construct the control signal processing system, called the ARM system.

LED made with ARM technology-specific control system capable of asynchronous control, communication can include: peer, LAN, Internet, and serial communications. It includes almost all of the PC interface;

52: What is a USB interface?

USB abbreviation is UniversalSerialBus, also known as universal serial interface, it supports hot-swappable and can connect up to 127 PC peripheral equipment; have both USB1.0 and USB2.0 interface standard;

53: What is the optical fill factor?

In every square, every single point of light-emitting area of the phase comparison element, such as the 3 in 1 and 3 and 1, the same pitch, the 3 and 1 of the emitting area is far greater than the 3 in 1.

54: What is a sub-surface mount?

Sub-surface mount is a DIP package light-emitting diode, characterized by: higher brightness, but the small perspective, more complex manufacturing process, only artificial plug welding, so the name is defined as the sub-surface mount.

26: What is the perspective? What is the viewing angle? What is the best view?

The direction of view is to observe the brightness down to the normal direction of the brightness of LED displays 1 / 2, both observed with a plane normal direction as the direction and angle.Divided into horizontal and vertical viewing angles;

Viewing angle is just to see the direction of image content on the display, and the angle formed by the normal display;

The best perspective is to just to see the full content on the display, without color cast, images, and the most clear direction and the angle formed by the normal;

27: What is the best line of sight?

Is able to complete just to see the contents on the display, without color cast, the location of the image content is most clear with respect to the vertical distance matrix screen;

28: What is the control point? Several points?

LED status and control requirements do not match the pixel; out of control points are divided into: the blind spot (also known as dead spots), often bright (or dark spots), flash point three;

29: What is a static drive?What is a scan driver? What is the difference between the two?

The output from the driver IC pin to the pixels between the implementation of “point” control is called the static drive; from the driver IC’s output pin to the pixel between the implementation of “point out” the control is called the scan driver, it needs to line control circuit; from the driver board can be clearly seen: the static drivers do not need to line control circuit, the cost is higher but the display is good, good stability, low light loss, etc.; scan driver it needs to line control circuit, but the cost low, showing poor results, poor stability, brightness, greater losses, etc.;

30: What is the constant current driver? What is a constant drive?

Constant current driver IC is allowed to work in the environment, the design provides constant output current value; constant voltage driver IC is allowed in the work environment, the constant output voltage under design;

31: What is the nonlinear correction?

If the computer output of digital signal without correction appears in LED color distortion appears on the display, so the control circuit in the system, the original computer output signal is calculated through a nonlinear function of the signals required for the display , due to non-linear relationship between the signals before and after, so we often call it as non-linear correction;

32: What is the rated voltage? What is the voltage? What is the supply voltage?

Rated working voltage refers to the voltage when the electrical work; working voltage is the rated voltage electrical appliances within the normal operating voltage; supply voltage AC and DC supply voltage points, we display the exchange for voltage is AC220V ~ 240V, DC supply voltage is 5V;

33: What is the color distortion?

Refers to the same object in nature and in the display, both for the human eye senses the difference between vision;

34: What is a synchronous system, what is the asynchronous system?

Synchronous and asynchronous relative to the computer said, the so-called synchronous system, is shown in the display and computer monitors simultaneously display the contents of the LED display control system; asynchronous system means that the computer edited display data is stored in advance display control system, the computer shut down after the LED display does not affect the normal display, this control system is an asynchronous system;

35: What is a blind spot detection technology?

Through the PC software and the underlying hardware, can blind spot on the display (LED open circuit and short circuit) detected, and the formation of the report told the LED Screen managers, such a technique is called blind-spot detection technology;

36: What is the power detection?

Through the PC software and the underlying hardware, can display the work of the various power supply conditions detected, and the formation of the report told the LED Screen managers, such a technique is called the power detection;

37: What is the brightness test? What is the brightness adjustment?

The brightness of light detection is where the ambient light LED display, through the light sensor, will display at the current ambient light detected, this detection method is called light detection; brightness adjustment is the brightness of said LED display issued by the brightness, the detected data feedback to the LED display control system or control computer, and then adjust according to the data adjust the brightness of the display, called the brightness adjustment;

38: What is the actual pixels? What is a virtual pixels? Several virtual sub-pixels? What is a pixel to share?

Real pixel is the number of pixels on the display and the actual physical number of pixels displayed is a 1:1 relationship, the actual number of display points, the number of points can only display the image information;

Virtual pixels means the number of pixels on the display and the actual physical number of pixels displayed is 1: N (N = 2,4) relationship, it can display the actual image pixels than the screen 2 times more pixels, or 4 times;

Virtual pixel in accordance with the virtual control can be divided into: software and hardware virtual virtual; in accordance with the multiple relationship is divided into: 2 times 4 times the virtual and the virtual, according to a row of lights on the module are two ways: 1R1G1B virtual and 2R1G1GB virtual;

39: What is the remote control? Under what circumstances to use?

Distance is not necessarily the so-called long-distance. Remote control including the main control console side and is in a LAN, but not far distance; and the main control console side and are distant in both space distance; customer requirements or beyond the optical fiber according to the customer directly to the control position control the distance, then use the remote control;

40: What is optical fiber? What is the cable transfer?

Optical transmission is the electrical signal into light signal transmission using a transparent glass fiber; cable transmission is the use of metal wires to transmit electrical signals directly;

1.What is LED?

LED is the abbreviation of light emitting diode,when the display screen industry said the “LED”,they refers specifically to emit visible light LED;

2: What is a pixel?

The minimum luminous of LED screen,as the same meaning with ordinary computer monitor pixel;

3: What is the pixel pitch (dot pitch)?

The distance from the center of one pixel to the center of another pixel;

4: What is the LED display module?

Composed by a number of display pixels, the structure of independent LED display can be composed of the smallest unit. Typical module are “8 × 8″, “5 × 7″, “5 × 8″, etc.

Through specific circuits and structures can be assembled into a module;

5: What is DIP?

DIP is a Double In-line Package acronym, dual in-line assembly;

6: What is SMT? What is SMD?

SMT is Surface Mount Technology (Surface Mounted Technology abbreviation), is the most popular technologies and processes of the electronics assembly industry;

SMD is a surface mount device (Surface mounted device abbreviation);

7: What is the LED display module?

Determined by the structure of the circuit and installation, with display, the screen functions through a simple assembly to achieve the basic display unit;

8: What is the LED display?

Throught some kind of control,the LED display screen was formed by arrayed LED device;

9: What is the plug lamp module? What are the advantages and disadvantages?

DIP package is the lamp with its light foot through the PCB, soldering tin filled through the hole in the lamp, module made by this process is inserted lamp module; advantages of a large angle, high brightness, good heat dissipation ; disadvantage is that pixel of low density;

10: What is the surface-mount module? What are the advantages and disadvantages?

SMD also known as SMT, the SMT package soldered welding process lights through the surface of PCB board, not through the PCB board light feet, module made by this process is called surface mount module; advantages are: great view, soft display image, pixel density, suitable for indoor viewing; drawback is the brightness is not high enough, heat lamp itself is not good enough;