How to fix the LED display?
Author:Chen Shichao Time:2021-06-10 10:16 Browse(646)
Installation method of LED display
Installation method of LED display screenA. the installation methods of LED display include inlaid, floor mounted, suspended, wall mounted, supported and pillar mountedB. classification and selection of LED displayThere are many kinds of LED displays.
there are four kinds of classification: one is classified according to indoor and outdoor, the other is classified according to working mode, the third is classified according to the number of colors, and the fourth is classified according to the unit density of LED tubes.

How to fix the LED display?

different types of displays have different uses.
each has its own advantages and disadvantages, and can be selected according to the needs.
different types of displays have different usesC. indoor and outdoor displaysThere is a big difference between indoor LED display and outdoor LED display.
firstly, the brightness is different.
the brightness of indoor LED display is several to dozens of times lower than that of outdoor LED display; The brightness of indoor display screen is just like that of TV set.
ultra high brightness LED must be used for outdoor display screen, and in order to further improve brightness and increase visual distance, more than one ultra high brightness LED must be packaged in one pixel.
outdoor display screen must be protected from (rain) water, direct sunlight, dust, high temperature, wind, lightning, etc, However, there is no need to consider these problems for indoor screens.
in this paper, the design of indoor screens is introducedD. on line and off-line displaysAccording to the working mode, LED displays are divided into two categories.
one is on-line display, also known as all-round display, and the other is off-line display, also known as intelligent display.
both on-line display and off-line display adopt international standard 8 × 8LED matrix module.
the surface of the screen is completely the same, and the basic display function is the same(1) the off-line display does not need to be connected with a microcomputer at ordinary times. The display has a built-in microcomputer, which can save multiple pictures after power failure,It can run independently without a microcomputer.
there are clock chips in some screens.
it can display calendar and clock automatically.
when the display content needs to be modified.
it can be modified by connecting a microcomputer through RS232.
the display screen of the joint model can only work by connecting a microcomputer;(2) there are fewer types of display modes for offline display.
there are pop-up, pull-up, pull-down, up and down display modes.
there are more display modes for online display.
especially if the program is produced and played with software such as 3DS, there are unlimited display modes.
there are more display modes for online display(3) the operation of the off-line display screen is very simple.
it is as simple and convenient as using an electric lamp.
because there is no need to connect a microcomputer.
one link is reduced, so the possibility of failure is reduced.
the on-line display screen needs someone to be responsible for the operation and maintenance.
especially if you want to make animation programs, you need special knowledge.
the on-line display screen needs to be operated and maintainedE, monochrome and color displays(1) monochrome displayStandard 8 is adopted × Each pixel can be red or green, and it can display all kinds of text, data and two-dimensional graphics.
indoor monochrome display screen is economical and practical.
only the color is a little single.
the color of indoor monochrome display screen is simple(2) color displayStandard 8 is adopted × 8 dual primary color LED matrix module (module size is the same as the previous).
each pixel has two LEDs emitting red light and one emitting green light.
when the red and green LEDs emit light at the same time,
it is yellow, so the dual primary color can emit red, yellow and green colors.
the dual base color screen has bright colors.
it can be used to display all kinds of color text, data Graphics, animation, etc; In addition,It can also be connected with various data devices to display real-time dynamic data and advertisements.
the indoor color display screen is eye-catching.
with bright visual effect and better information display effect, it is a widely used LED display screen(3) color gray screenStandard 8 is adopted × Each pixel has red, yellow and green colors, and each basic color has 16x16 gray level=256 or 256x256 gray level=64K colors, Even more colors.
the gray level of the color gray screen is rich.
the expressive force is superior.
in addition to having the same display effect as the color display screen.
the color gray screen can also display more colorful contents such as photos, images, three-dimensional graphics, animations and video images, with more delicate and full expressive force, The visual effect is more realistic and touching.
color gray display screen is also called color video display screen.
color gray display screen is also called color video display screenF, ordinary density and high density displaysThe density of the display screen is related to the pixel diameter.
the smaller the pixel diameter is, the higher the density of the display screen will be.
for specific selection.
the closer the viewing distance is, the higher the density of the display screen will be. The farther the viewing distance is, the lower the density of the display screen will be.
for specific selection, the closer the viewing distance is, the higher the density of the display screen will beG. special considerations for outdoor screensThe main problems of outdoor screen are as follows:(1) the display screen is installed outdoors.
it is often exposed to the sun, rain, wind and dust, and the working environment is harsh.
if the electronic equipment is wet or seriously affected by moisture, it will cause short circuit or even fire.
it will cause failure or even fire, resulting in losses.
the display screen is installed outdoors(2) the display screen may be attacked by strong electricity and strong magnetism caused by lightning(3) the environmental temperature changed greatlyWhen the display screen works, it will generate a certain amount of heat.
if the ambient temperature is too high and the heat dissipation is poor, the integrated circuit may not work normally, or even be burned, so that the display system can not work normally.
the display system can not work normally(4) the audience should be wide.
the visual distance should be long and the visual field should be wide; The ambient light changes greatly, especially the direct sunlightFor the above special requirements.
outdoor display must:(1) the screen and the joint between the screen and the building must be strictly waterproof and leak proof; Good drainage measures should be taken for the screen body, so that the accumulated water can be discharged smoothly once it occurs.
the screen body should have good drainage measures(2) install lightning protection devices on the display screen and buildings.
the main body and shell of the display screen shall be well grounded.
the grounding resistance shall be less than 3 ohm, so that the large current caused by lightning can be discharged in time.
the main body and shell of the display screen shall be well grounded(3) install ventilation equipment to lower the temperature.
make the internal temperature of the screen between - 10 ℃ and 40 ℃.
install axial flow fan on the back and top of the screen.
exhaust heat.
the temperature of the screen is lower than the temperature of the screen(4) select the industrial grade IC chip whose working temperature is between - 40 ℃ and 80 ℃.
prevent the display screen from starting when the temperature is too low in winter(5) in order to ensure long-distance visibility under strong ambient light.
ultra high brightness light-emitting diodes must be selected.
(6) the display medium is a new type of wide viewing angle tube.
the viewing angle is wide, the color is pure, consistent and coordinated, and the service life is more than 100000 hours.
the external packaging of the display medium is the most popular square cylinder with shielding edge at present.
silica gel seal, no metallization assembly; Its appearance is exquisite and beautiful, firm and durable, with the characteristics of direct sunlight, dust-proof, water-proof, high temperature and short circuit protectionH. The difference between sub surface stickers and surface stickersThree in one surface sticker: it refers to the synthesis of three luminous points encapsulated in the same pointThree in one sub surface sticker: it means that three square lamps are arranged in a straight line to form a pixel.
the sub surface sticker is composed of three square lampsIt means that the price is inferior to that of the sticker, but the display effect is the same as that of the stickerThree in one separate surface sticker: it means that the red, green and blue light-emitting points are packaged separately, and then arranged into a pixel as the sub surface stickerLED dot matrix display module can display Chinese characters, graphics, animation and English characters; The display modes include static, horizontal scrolling, vertical scrolling and page turning display.
a single module controls and drives 12 pieces (up to 24 pieces) of 8x8 dot matrix.
a total of 16x48 dot matrix (or 32x48 dot matrix), which is 12 times (or 24 times) of a single MAX7219 (or PS7219, HD7279, ZLG7289, 8279 and other similar LED display drive modules)! The "cascade" mode can be used to form any dot matrix large display screen.
the display effect is good.
the power consumption is low, and the cost is lower than that of MAX7219 circuit.
the display effect is good
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