Category Archives: ბიზნეს სიახლეები

Although LED display technology is becoming more and more mature, it is still inevitable that some of them are black merchants. Shenzhen LED display manufacturers remind you to take good care of them. When you purchase products, you must recognize the products clearly, not only recognize the low price but not the performance of the products. The screen accident of LED, a large-scale musical theater in Tokyo, was staged on February 2, 2015. Six actors and others were injured and their lives were not in danger. The police station is conducting a detailed investigation into the cause of the accident. At about 7:00 a.m. on June 10, 2015, the LED display screen and billboard on the post office building of Hubin North depot on Huanghe Road in Sanmenxia caught fire, causing a large fire in the whole building. The cause of the fire is unknown.

nowadays, LED display products are more and more widely used. If LED display still keeps such a state of “madness from time to time”, the higher the risk factor for the society. When the LED display gradually evolves into “dangerous goods”, its value will disappear!

ამიტომ, let’s not talk about reflection, action is the most practical! After reading, please LED display manufacturers and rental manufacturers, not in silence in the so-called reflection, so many accidents appear, it is time to take practical action!

it is the so-called man’s conscience and the quality of his products. We can allow products without innovation, but the basic product quality should be well controlled, do not pit consumers, do not smear the LED display industry. If even life can be ignored by the unscrupulous enterprise, then please “deport”. Comment on

LED display screen factory: do assured product, do conscience enterprise. Often reflect on one or two, but do not see a bit of action, so that the wrong do not change the business, LED display market chaos, but also seriously damage the people’s property, become the public enemy of the people, but also in the face of LED display screen smear. As a conscientious enterprise that has the courage to undertake social responsibility, LED display screen factory adopts high-quality LED display screen. The company has been a “clean family” for several years since its establishment, without any industry “black history”.

In recent years, LED display screen is widely used in various fields such as indication, display, decoration, backlight, general lighting and urban night scene. It can be roughly divided into: indoor LED display, outdoor LED display, commercial LED advertising screen, led creative screen, stadium LED screen, LED floor tile screen, LED color screen, და ა.შ.

different companies focus on different sales strategies. Some companies focus on price war, materials, performance, quality are often unsatisfactory, do not covet cheap, buy some substandard low-quality products, regret.

So how can consumers choose a product that they are satisfied with in the complicated environment of LED display industry? The following LED display factory will briefly summarize several points for you as your reference for screening: the most important component of

LED display screen is led device. The general selection criteria are: მაღალი სიკაშკაშე, low operating voltage, დაბალი ენერგიის მოხმარება, large-scale, გრძელი ცხოვრება, impact resistance and stable performance. Failure rate
refers to the failure rate of LED display screen from the beginning of assembly to 72 hours aging, and the failure rate shall not be higher than 3 / 10000 (refers to the failure caused by LED device itself)

2 2 LED is a semiconductor device, which is sensitive to static electricity and easily leads to static failure. ამიტომ, antistatic ability is very important to the life of display screen. Ზოგადად, the failure voltage of LED human body electrostatic mode test should not be lower than 2000V.

3. სიბრტყე
LED display surface flatness should be within 0, so as to ensure that the display image will not be distorted. Local bulge or concave will lead to dead angle of the display screen.

4. Brightness and visual angle
the brightness of indoor full-color LED display screen should be above 800 CD / მ2, and outdoor full-color LED display screen should be above 1500? CD / მ2, so as to ensure the normal display of LED display screen, otherwise, the brightness will be too low to see the displayed image. If the environment is very bright, please give priority to LED or rear projection. The brightness is mainly determined by the quality of LED tube core? The size of

visual angle directly determines the visible area space of LED display, so the larger the better. The size of visual angle is mainly determined by LED chip.

5. White balance effect
white balance effect is one of the most important indicators of LED display. In chromatics, when the ratio of red, green and blue is 1:4.6:0.16, the pure white will be displayed. If the actual proportion has a little deviation, there will be a deviation of white balance. The quality of white balance is mainly determined by LED chips, and LED chips also have an impact on color reducibility.

6. Color reducibility
color reducibility refers to the color restoration of LED display screen, that is, the color displayed on LED display screen should be highly consistent with the color of the playback source, so as to ensure the authenticity of the image.

7. Whether there are mosaics or dead spots?
mosaics refer to the small four squares which are always bright or black on the LED display screen, which is the phenomenon of module necrosis. The number of dead point is mainly determined by the quality of LED chip. ა 6032 a 6032 8. With or without color block a 6032 color block refers to the lack of color in a small area; the main reason is to control the IC and power supply, control the quality of circuit layout.

9. The appearance of LED display screen
LED display screen appearance is the most intuitive, the most original to do the most preliminary evaluation of product quality. The appearance quality can reflect the production process and material quality of LED display screen manufacturer.

Ამჟამად, Beijing and other first tier cities are strictly regulating the outdoor LED display advertising market. The approval of outdoor LED display screen will be more and more strict, and the setting location will be transferred from the previous “everywhere flower” type to the “land planning operation” type (pure commercial area), and such a change will have a certain impact on the development of outdoor display screen. თუმცა, according to the case of “exposure platform of dishonest executee” of LED display screen, while emphasizing the commercial nature, LED display should also strengthen its social management attribute, so as to reduce people’s negative evaluation of outdoor LED display screen to a certain extent, pull in the sense of distance from the audience, and make LED display screen more popular in the field of outdoor display.

1. The Executive Bureau of the court concluded 1182 cases throughout the year, and exposed the head photo and debt information of “Lao Lai” on the LED display screen of the square with large flow of people. The court of Shifeng District and the police improved the linkage mechanism of execution, reported the clues of the persons who had not been executed for a long time to the public security organs, and then the police used the advantages of investigation to find and control the executed persons or related personnel, so as to successfully seize 12 dishonest persons who were executed. According to Ji Zhi, deputy director of the Executive Bureau of Jiangbei court, under the coordination of Jiangbei District Committee, Jiangbei court initiated the initiative of using public welfare time to “shine on Lao Lai” on the LED screen of business district. Over the past two years, this initiative has achieved good results. “The court and the District Committee are coordinating. In the near future, we will launch Maoye’s” first screen in Asia “to expose those who have been executed for breach of faith.”

3. Dezhou intermediate people’s court exposes Lao Lai’s information The Municipal Intermediate People’s court, located in Dexing middle Avenue, Dezhou City, plays “the information of the person subjected to execution for breach of faith” on the large LED screen every day. The personal information such as the name, age, photo, ID card number and other personal information of 116 dishonest suspects, commonly known as “Lao Lai”, are divided into two groups, and are rolled and “aired” in batches, attracting many passers-by and nearby people to stop and watch. Many people said, “this will make Lao Lai lose face.” Lao Lai will not be able to do anything in society

4. Yanjiang District Court exposes Laolai’s information Yanjiang District Court has a variety of ways to expose the “Lao Lai”. In addition to publicizing and exposing the dishonest Executees on the public platforms such as the court bulletin board, newspapers and TV media, it also set up an LED display exposure platform outside the Straits Celebrity Hotel, publicized the mobile vehicle led in the public Security Bureau and published the list of the executed persons. A total of 72 persons were exposed on the outdoor LED display screen and media Human information. Ამავე დროს, the Executive Bureau dispatched police officers to the communities and towns where the dishonest person was executed, and posted 114 copies of the information of the person who was executed in violation of his / her household registration on the bulletin boards. A total of 114 copies of 57 people were posted. These 57 people were the victims who failed to fulfill the obligations of effective legal documents.

The heat dissipation of ეტაპის LED დისპლეი screen will have different considerations according to the power and the place of use. ა 6032 1, air hydrodynamics, the use of lamp shell shape, to produce convective air, which is the lowest cost way to strengthen heat dissipation.

2 2, thermal conductive plastic shell, filled with thermal conductive materials during plastic shell injection molding, to increase the thermal conductivity and heat dissipation capacity of the plastic shell.

3, aluminum heat sink, this is the most common way of heat dissipation, using aluminum fins as a part of the shell to increase the heat dissipation area of LED display.

4, LED display surface radiation heat treatment, lamp shell surface radiation heat treatment, simple is to paint radiation heat dissipapipe technology, the heat from the LED full-color display chip to the shell heat sink fin. In large luminaires, such as street lamps, are common designs.6, fan heat dissipation, lamp shell with a long-life and efficient fan to strengthen the heat dissipation, this method is low cost, good effect. თუმცა, to change the fan is troublesome, and it is not suitable for outdoor LED display, this design is relatively rare. The transparent liquid with high thermal conductivity is filled into the bulb of lamp body by using liquid bulb packaging technology. In addition to the principle of reflection, this is the only technology using LED chip to conduct heat and heat. The purpose of lamp shell heat dissipation is to reduce the working temperature of LED full-color display chip. Because the expansion coefficient of LED chip is very different from the expansion coefficient of metal heat conduction and heat dissipation materials, the LED display core can not be directly welded to avoid high and low temperature thermal stress damaging the LED full-color display chip. The latest high thermal conductivity ceramic material, thermal conductivity close to aluminum, expansion system can be adjusted to synchronize with LED full-color display chip. In this way, heat conduction and heat dissipation can be integrated to reduce the intermediate process of heat conduction.

LED display control card problem: There are four reasons for this:

1. There are problems in the connection of the cable,
the control card and the module are loose or damaged. It is suggested to plug in the cable again to see if the problem can be solved.

2 2. LED display module damaged,
module short circuit, module chip problems. LED display signal is the input signal transmitted from the output pin of one unit board to another board, so if there is a problem with one board, the whole row behind it will not be bright or abnormal. So when there is a problem with a row of LED displays, we should replace the board that is not normal at the beginning of this row, or jump this board directly with a long cable, and then check whether the board at the back shows normal.

3. LED display control card problem
control card data transmission error, but this situation is relatively rare. Turn on the power and check whether the indicator light of the control card is on; if not, check whether there is 5V power supply and whether the LED display can display the content. If the content can be displayed, the function of the control card display content is good; then use the control card software to find the control card. If it can be found, the function of the control card sending content is good; If you can’t find it, check whether the communication line is connected properly. If it is, it is likely that there is something wrong with the card. As long as these two functions are good, the control card is good. Otherwise, the control card will be replaced.
4. LED display power supply problem
if the power supply is broken, it will directly cause several boards not to light or not normal at the same time, because one power supply controls several boards at the same time. If the LED electronic screen is in the same small area of several boards do not display or display abnormal, it should be considered whether the power supply is broken. The most direct detection method is to take the DC voltage of Wan meter to test whether the output voltage is between 4.5 V and 5.5 v. If it is not in this range, it is necessary to consider replacing the LED display power supply.

The viewing angle of LED display screen is the maximum viewing angle that the viewing object can see the contents of the display screen. The angle of view of LED display depends on the angle of LED lamp bead. ა 6032 a 6032

1. It is usually used as indicator light, and its half value angle is 20 °-მდე 45 °. Ამჟამად, most of the outdoor display screens are of horizontal view angle of 100 °, vertical angle of view of 50 ° and scattering type

2. This is an elliptical led with a larger viewing angle, and the indoor LED display screen is selected to be 120 ° horizontally and vertically;

3. High directivity. It is usually encapsulated in epoxy resin with sharp tip or with metal reflective cavity and without scatterer. Because of its particularity, the LED display screen on the highway is generally 30 ° and the circular LED display screen with viewing angle is enough. Some high-rise buildings have high requirements for vertical viewing angle. The angle of view and brightness are contradictory to each other, and large angle of view will inevitably reduce the brightness. The choice of perspective depends on the specific purpose.

LED display screen word change words generally have serial port change word and U disk change word.

1. Serial port is led display directly connected to the computer, we open the control software. Edit the font of the program content and send it. There is a column in the menu of USB flash disk software. Click USB to download and save the setting parameters and contents to the USB flash disk. When changing the led screen program, directly copy the content with U disk and replace it on the LED display.

if there is no effect after changing the text, it is possible to concentrate.

There is a problem with the serial port connection line. Use the control card software to check whether it can be connected to the display screen. If the connection is generally OK, it still can’t be solved. Check whether the circuit is short circuited. If the U disk does not respond to the word change, you should check whether there is a problem with the U disk. Whether the software of LED display control card is corresponding. After confirming that the control card software is correct, format the U disk and then import the data.

With the development and maturity of small pxiel LED display, some people in the industry said that the current LED display market is in a state of “demand exceeds supply”. Due to the closer space between indoor and outdoor, the market demand for lamp beads is increasing, which also prompted the upstream and midstream production enterprises to increase production scale.

it is understood that with the decline in the prices of some finished products, many downstream LED display manufacturers have increased their production capacity to ease the pressure of price competition. თუმცა, the increasing demand of downstream manufacturers also prompted the upstream and midstream raw material manufacturers to expand their production scale to meet the demand of downstream markets. თუმცა, in recent years, with the economic downturn, the survival pressure of enterprises has increased. With the rise of some costs, the cost of raw materials in the upstream of LED display increased.

as we all know, in the production process of LED packaging devices, raw materials account for 75-80% of the production cost, so in the case of rising raw material costs, it will inevitably bring certain production pressure to packaging manufacturers. It is understood that the current number of LED packaging units with gold wire is about 15-18 იუანი, while the relatively cheap copper wire is 8-1.5 იუანი.

at the same time, some people in the industry have disclosed that for high-level packaging devices, large packaging manufacturers are more willing to purchase international brand accessories products. Undoubtedly, the price of international brand accessories products is relatively high. In such a case, it is not difficult for packaging manufacturers to adjust the price.

low price competition bottoms out, high quality makes the price rise. In recent years, with more and more people making LED display screen products, the homogenization is serious, resulting in the rapid decline of price. Even though the production capacity and sales scale of enterprises have increased compared with the same period of last year, the intensified market competition has led to a sharp drop in product prices and a narrowing of gross profit space. In this regard, some insiders said that in terms of prices, raw materials such as LED display chips and packaging have bottomed out. Or in other words, low price competition is not enough to support the rapid development of LED display enterprises.

They are more or less involved in the LED display market, bringing people a new visual experience. Some of them may promote the further development of LED display industry, or bring new threats to the original LED display technology, and urge the continuous innovation of LED display technology. თუმცა, as a member of the LED display industry, we should have a new technology The positive attitude of attention and learning, constantly absorb and integrate, and promote the development of LED display industry.

AR Augmented Reality
AR is a kind of technology that can calculate the position and angle of camera image in real time, and attach the corresponding auxiliary image or virtual image through the computer, so as to display the virtual and reality at the same time, and enhance people’s sensory experience through the complementary and superposition between virtual and real.

3D holographic projection
, we often saw such pictures in science fiction movies: the hero waved his hand, and some stereoscopic images appeared in the air, or talked with the hero, or made some actions according to the master’s instructions. დღეს, this kind of science fiction film plot has become possible in real life, and the realization of it is “holographic projection technology”. Holographic projection technology, also known as virtual imaging technology, is a technology that records and reproduces the real three-dimensional image of an object by using the principle of interference and diffraction. The three-dimensional image is suspended in the air by holographic projection, which is a real spatial imaging. The scene is also illusory, real and beautiful, as if it brought the viewer to another world. In addition to producing three-dimensional aerial illusions, holographic projection can also allow the illusion to interact with the people around them and produce amazing performance effects.

LED display technology
as thin as paper film led display screen — LED display screen has attracted the attention of the industry since it was born. The display technology has the characteristics of self luminous, using very thin organic material coating and glass substrate. When there is an electric current passing through, these organic materials will emit light, and the LED display screen has a large viewing angle, and can greatly save power. Ამავე დროს, the plasticity of OLED displays has caused the recent changes in the use of displays. This is because LED displays can be produced not only from glass substrates, but also from flexible plastic materials, which will expand the use of LED displays.

Ghost images phenomenon is particularly prominent in small pitchLED display.

since we know the cause of ghost, then we have a way to eliminate it. Since the electricity is released through the LED lamp, then we connect a resistance to the ground on the line line to discharge the line line, so it’s ok? დიახ, it’s a good way to get rid of the ghost problem, but there’s another phenomenon: the caterpillar phenomenon. First of all, what is called caterpillar phenomenon is that if one of the lights breaks down in the scanning screen, the other lights in the column of this lamp are always highlighted. What is the reason for this? We analyze it from Figure 1 ქვევით

The breakdown of a lamp in
, such as D4, is equivalent to that of other lights in this section of the path train, such as D8, D12, D16, and the current on the broken down lamp D4 and resistance R1 will form a path to the ground, causing the whole column to highlight. In the case of LED lamp quality can not be guaranteed, this will be a fatal blow to the LED display.

it seems that we can see that these two phenomena are contradictory relations. თუმცა, is there a way to eliminate these two phenomena at the same time? The answer is yes.

first of all, we must not add resistance on the line. We have to find a kind of component that can quickly discharge the residual power of the line after the line is turned off, and then restore the off state.

based on the above considerations: we use an IC device called 4051. The use of requires the system to provide a signal “od”, that is, the vanishing image we see in the debugging interface (this signal is provided in the scanning board). The longer the elimination time is, the better the effect is. Because the connection between the IC line and the ground is in the electronic switch state, the caterpillar phenomenon basically disappears. What should be noted here is that because the shadow elimination takes up the system clock, it will have a certain impact on the data of the LED display screen, and it will also increase the difficulty of PCB drawing!

now some LED display manufacturers use the above ideas to develop a new IC integrated in the line driver IC for shadow elimination and caterpillar removal. It uses the clock signal generated by itself to control the connection time between the line and the ground, so as to remove the hidden lines and the caterpillars. More importantly, this use reduces the number of LED display driver IC, and can improve the data volume of the whole LED display screen. თუმცა, because this kind of IC is integrated circuit, its driving current ability is weak, and the former driving tube is simple MOSFET, the driving current ability of this kind of IC is larger, so the number of lamps that this kind of IC can carry is less than before. The ghost image produced by

column scan is mainly caused by the difference of conduction voltage drop of LED display screen. There is a special LED display driver chip to remove the ghost shadow.

What is led display?.

Comparison of LED display screen and LCD display screen： The power consumption ratio of LED display screen and LCD display screen is about 1:10, LED display screen is more energy-saving; it has higher refresh rate and better performance in video; LED display provides a wide angle of view up to 160 ° and can display various text, digital, color images and animation information, and can play TV, video, VCD, DVD and other color video signals. The reaction speed of single element of LED display screen is 1000 times faster than that of LCD screen. It can also take care of under strong light and adapt to low temperature of – 40 ℃.

LED display maintenance
first: determine the type of hub used by the LED display module or LED display unit board, so that the interface definition of the wiring can be the same.

secondly: according to different types of LED display module or LED display unit board, send the corresponding program to the receiving card to ensure that the LED display module and LED display unit board are displayed under the correct program, which is the premise to find out the cause of the fault. საერთოდ, the model of the module or unit board will be printed on the PCB board.

finally: observe the LED display module or LED display unit board phenomenon, determine the initial fault. Მაგალითად, common blind lights, string points, small squares, და ა.შ. Using the multimeter to find out the fault is mainly to use the above short circuit detection method to detect between the chip and the lamp pin.

outdoor LED display must pay attention to the use of LED display screen,
LED display installed outdoors, often exposed to the sun and rain, wind blowing dust cover, the working environment is bad. If electronic equipment is wet or seriously damped, it will cause short circuit or even fire, and cause fault or even fire, resulting in loss. The display screen may be attacked by strong electricity and strong magnetic field caused by lightning.

outdoor LED display varies greatly with the ambient temperature. When the outdoor LED display screen works, it will generate a certain amount of heat. If the environment temperature is too high and the heat dissipation is poor, the integrated circuit may not work normally, or even be burned, so that the outdoor LED display system can not work normally. The audience is wide, the visual distance is far and the vision is wide; the ambient light changes greatly, especially may be exposed to direct sunlight.

The ambient temperature of outdoor LED display screen is quite complex.

1. High temperature will lead to the complete destruction of LED display screen.
(1) led display panel operating temperature exceeding the chip carrying temperature will rapidly reduce the luminous efficiency of LED display, produce obvious light attenuation, and cause damage (2) LED displays are mostly packaged with transparent epoxy resin. If the junction temperature exceeds the solid phase transition temperature (usually 125 ℃), the packaging material will change to rubber like and the coefficient of thermal expansion will rise sharply, which will lead to open circuit and failure of LED display. 2. Temperature rise will shorten the life of LED display. The life of LED display is shown by its light fading, that is, the brightness becomes lower and lower after a long time, until it finally goes out. The time of luminous flux attenuation 30 is usually defined as its lifetime.

usually causes led display panel light failure in the following aspects:
(1) defects in LED display chip materials will proliferate and multiply rapidly at high temperature until they invade the luminous region, forming a large number of non radiative composite centers, which seriously reduces the luminous efficiency of LED display. გარდა ამისა, at high temperature, micro defects in the material and fast expanding impurities from the interface and the board will also introduce into the luminescent region, forming a large number of deep energy levels, which will also accelerate the light attenuation of LED display devices (2) At high temperature, transparent epoxy resin will be denatured and yellowing, which will affect its light transmission performance. The higher the working temperature, the faster this process will be, which is another main reason for LED display panel light failure.

(3) phosphor is also one of the main reasons that affect the LED display light attenuation, because the phosphor attenuation is very serious at high temperature. ამიტომ, high temperature is the main cause of LED display screen light failure and shortening LED display life. Different brands of LED display screen light attenuation is different, usually led display manufacturers will give a set of standard light attenuation curve. The luminous flux attenuation of LED display caused by high temperature is irrecoverable. The luminous flux before the irrecoverable light attenuation of LED display screen is called the “initial luminous flux” of LED display screen. ა 6032 (1) the concentration of electrons and holes will increase, the band gap will decrease, and the electron mobility will decrease.

(2) led display increases, the probability of radiation recombination between electrons and holes in the potential well is reduced, resulting in non radiative recombination (heat generation), which reduces the internal quantum efficiency of LED display.

(3) led display panel causes the blue light peak of the chip to shift to the long wave direction, which makes the emission wavelength of the chip and the excitation wavelength of the phosphor not match, and also causes the external light extraction efficiency of the white LED display screen to decrease. With the increase of temperature, the quantum efficiency of phosphor and the light output
(4) led display screen decrease, and the extraction efficiency of external light of LED display screen decreases.

(5) silica gel were greatly affected by ambient temperature. With the increase of temperature, the thermal stress inside the silica gel increases, which leads to the decrease of the refractive index of silica gel, which affects the light efficiency of LED display. The influence of temperature on the luminous wavelength (light color) of LED display screen
the luminous wavelength of LED display screen can be generally divided into peak wavelength and main wavelength. The peak wavelength is the wavelength with the maximum light intensity, and the main wavelength can be determined by X and Y chromaticity coordinates, which reflects the color perceived by human eyes. ცხადია, the change of LED display wavelength caused by junction temperature will directly make the eye feel different about the color of LED display. For an LED display device, the band gap value of the luminescent zone material directly determines the wavelength or color of the device. With the increase of temperature, the band gap of the material will decrease, which will lead to the length of the light emission wavelength and the red shift of the color.
5. Too high temperature will limit the maximum injection current of LED display screen. The above points are the introduction of the influence of temperature on LED display screen. Through the above introduction, it is known that the influence of temperature rise on LED display is very great. So the right temperature is the focus of LED display.