The most complete LED screen noun explanation

Time:2018-12-26 Views:148

LED screen industry people get together, it is very easy to talk about LED screen products, if you do not know anything, such a chat, do not feel great pressure?Today, small make up to share with you the history of the most complete LED screen noun explanation, let you from the LED screen white instant change to understand the screen king!

1. What is LED?

The EMITTING DIODE, an acronym for LIGHT EMITTING DIODE, is the display screen industry‘s preferred EMITTING DIODE that emits a visible wavelength.

2. What are pixels?

The smallest unit of light emitted by an LED display, having the same meaning as pixels used in ordinary computer displays.

3. What is pixel spacing (point spacing)?

The center distance between two adjacent pixels, the smaller the spacing, the shorter the visual distance.People in the industry usually abbreviate P for point spacing.

4. What is pixel density?

Also known as dot matrix density, it usually refers to the number of pixels per square meter on the display screen.

5. What is LED display module?

A smallest unit consisting of several display pixels that is structurally independent and capable of forming an LED display.The typical one is 8 times 8, 8 times 7, etc.

6. What is DIP?

DIP is short for DOUBLE in-line PACKAGE, which is a DOUBLE in-line assembly.

7. What is SMT?What is SMD?

SMT is the SURFACE MOUNTED technology, it is the most popular technology in the electronic assembly industry.SMD is the surface mounted device.

8. What is LED display module?

Have circuit and installation structure to determine, have display function, can realize the basic unit of display function through simple assembly.

9. What is LED screen?

Through a certain control mode, the display screen is composed of LED device array.

10. What is the plug-in module? What are its advantages and disadvantages?

DIP encapsulated lamp passes the lamp foot through the PCB board and fills the tin into the lamp hole by welding. The module made by this process is the plug lamp touch group, which has the advantages of high brightness, good heat dissipation and low pixel density.

11: what is a tabulation module?What are the advantages and disadvantages?

Table paste is also known as SMT, SMT encapsulated lamp through the welding process welding on the surface of the PCB board, the lamp foot does not need to go through the PCB board, the module made by this process is called table paste module, the advantages are: good display effect, pixel density, suitable for indoor viewing: the disadvantages are not bright enough, the lamp itself heat dissipation is not good enough.

12. What is a subsurface sticker module?What are the advantages and disadvantages?

Subsurface sticker is a product between DIP and SMT. The packaging surface of LED lamp is the same as SMT, but its positive and negative pin is the same as DIP‘s. It is also welded through PCB in production.

13. What is three in one?What are its advantages and disadvantages?

Is refers to the RGB three different colors of LED chip packaging SMT lights in accordance with a certain distance of vertical juxtsition, so not only has 3 in one all the advantages, but also can solve the three in one of the shortcomings: complex process, difficult maintenance.

What is three and one?

Is the RGB three independent packaging SMT lamps in accordance with a certain distance of vertical juxtaposition together, so not only has the advantages of 3 in one, but also can solve the disadvantages of 3 in one.

15. What is a double-base color, pseudo-color and full-color display screen?

Led with different colors can form different display screen, the double base color is composed of red, green or yellow green two colors, false color is composed of red, yellow green, blue three different colors, full color is composed of red, pure green, pure blue three different colors.

16: what is luminous brightness?

The intensity of light emitted per unit area of LED display screen is CD/square meter, which is simply the intensity of light emitted by a square meter display screen.

17: what is the brightness level?

A series of manual or automatic adjustments between the lowest and highest brightness of a full screen.

18. What is the gray level?

At the same brightness level, the display screen from the darkest to the brightest technical processing level.

19. What is the maximum brightness?

Under a certain ambient illumination, each base color of LED display screen is at the maximum brightness and gray level.

What is a mole pattern?

It is when shooting the full-color LED screen at work that some irregular water ripples appear on the screen of LED screen. These water ripples are known as "mole patterns" in physics.

What is a PCB?

Printed circuit b is the abbreviation of printed circuit board.

22. What is the unit board specification?

Refers to the size of a unit plate, usually expressed in terms of the length of the unit plate multiplied by the width, in millimeters.(48 x 244)

23. What is the resolution of the unit plate?

Refers to the number of pixels in a cell board, usually expressed as the number of rows in the cell board multiplied by the number of columns.(e.g. 64 x 32)

What is BOM?

BOM is short for bill of material.

25: what is white balance and what is white balance regulation?

When we say white balance, we mean the balance of white, that is, the balance of brightness proportion of the three colors of RGB;RGB three colors brightness ratio and white coordinate adjustment, known as white balance adjustment.

26: what is contrast?

The ratio of the maximum brightness of LED display screen to the background brightness under a certain ambient illumination.

What is color temperature?

The color emitted by the light source is the same as the color emitted by the black body at a certain temperature. The temperature of the black body is called the color temperature of the light source.

What is chromatic aberration?

LED display screen is composed of red, green and blue colors to produce various colors, but these three colors are made of different materials, the Angle of view is different, the spectral distribution of different leds is changing, these can be observed differences are called chromatic aberration.When the LED is viewed from a certain Angle, its color changes, and the human eye‘s ability to judge the color of a real picture (such as a movie picture) is better than that of a computer generated picture.

29. What is the frame change frequency?

The number of screen information updates per unit time.

30. What is the refresh frequency?

31: what is perspective?What is viewable?What is the best perspective?

The Angle of view is when the brightness of the viewing direction drops to 1/2 of the brightness of the normal line of the LED display screen.The Angle between two observation directions of the same plane and the normal direction is divided into horizontal and vertical perspectives.The Angle of view is the Angle between the normal line of the screen and the direction of the image content on the screen.The best Angle of view is to be able to see the content on the screen exactly, without flat color, and the Angle between the clearest direction of the image content and the normal line.

32: what is the best stadia?

It is to be able to see exactly the contents of the screen, and not flat color, the image content of the clearest position relative to the vertical distance of the screen body.

33: what is a point of loss of control?Several points?

The pixel points whose luminous state is inconsistent with the control requirements are divided into three types: blind point (also known as dead point) and flash point (or dark point).

What is static drive:?What is a scan driver?What‘s the difference?

From the output of the driver IC feet to the practice of "point to point" between pixels of control is called static drive, from the driver IC output pin to the practice of "point to the column" between pixels of the control is called scanning drive, it requires a row control circuit, can see clearly from the driven plate: static line driver does not need to control circuit, high cost to teach, but shows the effect is good, good stability, brightness loss taught, etc.;Scanning drive it requires line control circuit, but low cost, poor display effect, brightness loss teach large.

What is constant current drive?What is constant pressure drive?

Constant current refers to the current value specified in the design of constant output in the working environment allowed by driving IC: constant voltage refers to the voltage value specified in the design of constant output in the working environment allowed by driving IC.

36. What is the general aspect ratio of LED display?

Graphic screen: according to the content displayed to determine;Video screen: usually 4:3 or close to 4:3;The ideal ratio is 16:9.

37. How many points can a control system control?

Communication screen A card: single color, double color 1024 x 64;Communication screen B card: single color: 896x512 dual color: 896x256;DVI dual color screen: 1280 x 768;DVI full color screen: 1024 x 512.

38. What is nonlinear correction?

If computer output digital signal without correction is displayed in the LED display screen color distortion, so within the system control circuit, the original computer output signal through a nonlinear function calculation of the signal display need, because belongs to the nonlinear relationship between signal before and after, so, we often call it nonlinear correction.

What is the rated working voltage?What is the working voltage?What is the supply voltage?

Rated working voltage refers to the voltage when the working voltage is normal;Working voltage refers to the rated voltage range of electrical appliances, the normal working voltage value: supply voltage ac and tributary supply voltage, our reality ac supply voltage is AC220V-- -240v, dc supply voltage is generally 5V DC12V solar power supply is generally 12V.

What is color distortion?

Refers to the same object in nature and display on the screen, the two for the human eye sensory vision difference.

41: what is a synchronous system and what is an asynchronous system?

Synchronization and asynchrony are relative to what the computer says. The so-called synchronization system refers to the LED display control system that synchronously displays the content displayed on the screen and the computer display.Asynchronous system means that the display data edited by the computer is stored in the display control system in advance, and the shutdown of the computer will not affect the normal display of LED screen. Such a control system is the asynchronous control system

What is blind spot detection technology?

Through the upper software and the underlying hardware, blind spots (LED open circuit and short circuit) on the display screen can be detected, and a report is formed to tell the LED screen manager, such a technology is called blind spot detection technology.

What is power detection?

Through the upper software and the underlying hardware, the work of each power supply on the display screen can be detected, and the formation of a report to tell the LED screen manager, such a technology is called power detection technology.

What is brightness detection?What is brightness regulation?

Brightness detection refers to the ambient brightness of LED display screen. The ambient brightness of display screen is detected by light sensor. This detection method is called brightness detection.Brightness adjustment refers to the brightness emitted by the LED display screen. The detected data is fed back to the LED display control system or computer, and then the brightness of the display screen is adjusted according to this data, which is called brightness adjustment.

What are real pixels?What are virtual pixels?How many virtual pixels are there?What is pixel sharing?

Real pixels refer to the 1:1 relationship between the number of physical pixels on the display screen and the number of pixels actually displayed. The actual number of dots on the display screen can only display the image information of the number of dots.Virtual pixel refers to the relationship between the number of physical pixels on the display screen and the number of pixels actually displayed: 1: N (N = 2, 4). It can display two or four times more image pixels than the actual pixels on the display screen.Virtual pixels can be divided into: software virtual and hardware virtual: 2 times virtual and 4 times virtual according to the multiple relationship; 1R1G1B virtual and 2R1G1B virtual according to the lighting arrangement on a module.

What is remote control?Under what circumstances?

The so-called long distance is not necessarily long distance.Remote control includes the main control end and the controlled end in a LAN, and the space distance is not far;And the main control end and the controlled end in a relatively long space distance, customer requirements or according to the customer control position beyond the distance of the optical fiber direct control, then use remote control.

What is optical fiber transmission?What is network transmission?

Optical fiber transmission is to change the electrical signal into optical signal and use transparent glass fiber for transmission.

Under what circumstances do you use network cable?Under what circumstances is optical fiber used?

When the distance between the display screen and the wiring of the control computer is less than 100 meters, network cable is used for transmission.When the distance between the two is less than 500 meters and more than 100 meters, multi-mode fiber is used; when the distance is more than 500 meters, single-mode fiber is used.

What is LAN control?What is Internet control?

In the LAN internal control through a computer another computer or connected to other external devices, this control method is called LAN control, the main controller through the controller in the INTERNET network IP address, to achieve the purpose of control, is called INTERNET control.

What is a DVI?What is VGA?

DVI is short for Digital Video interface, or Video interface.It is now a universal international digital video signal interface.

What is a digital signal?What is a digital circuit?

Digital signal refers to the value of signal amplitude is discrete, the amplitude is limited to 0 and 1 two finite values, the processing and control of this kind of western signal circuit is called digital circuit.

What is an analog signal, what is an analog circuit?

Analog signal means that the value of signal amplitude is continuous in time;The circuit that processes and controls this signal is called an analog circuit.

53. What is a PCI slot?

PCI slot is an extension slot based on the PCI local bus (PEDPHERD component interconnect).PCI slots are the main expansion slots of the motherboard. By plugging in different expansion CARDS, almost all the external functions that the computer can achieve at present can be achieved.

What is an AGP slot?

Accelerate graphical interfaces.AGP is an interface specification that allows 3D graphics to be displayed at much faster speeds on a typical PC.AGP is an interface designed to deliver 3D graphics faster and more smoothly.He USES the main memory of a typical PC to refresh the images displayed on the display, and supports 3D graphics such as texture mapping, zero-buffer and alpha-blend.

What is GPRS, what is GSM?What is CDMA?

GPRS is through the Packet wireless service (General Packet Radiosrvice), is a new carrier service developed on the existing GSM system, mainly used for radio communication;GSM is the abbreviation of "Global System For Mobile Communication" standard (Global System For Mobile Communication) launched by European standardization commission in 1992. It adopts digital Communication technology and unified network standard to ensure Communication quality and develop more new services For users.CODE DIVISION MULTIPLE ACCess: a new and mature wireless communication technology based on spread spectrum technology.

56. What is the use of GPRS technology for the display screen?

In the GPRS data network based on mobile communication, the data of our LED display screen can be communicated through the GPRS transceiver module to realize remote point-to-point small amount of data transmission and remote control.

What is a USB port

USB UNIVERSAL SERIALBUS UNIVERSAL SERIALBUSAlso known as the universal serial interface, it supports hot plugging and up to 127 PC peripherals: USB1.0 and USB2.Two interface standards.

The number of times a display image is repeatedly displayed by the display screen in unit time.