You understand the hazards of the TV with a tail !

The trailing edge of the display device that appears when you display dynamic images scared , can not see the details of the phenomenon. Tailing phenomenon is not caused by decreased sharpness of the image , and people are likely to produce visual fatigue ,lcd graphic display modules long-term view will appear dizziness, decreased vision symptoms. Even if because of your bad eyesight , can not distinguish the tailing phenomenon, long-term vision for your viewing will be adverse health effects .


LCD TVs are currently exist tailing phenomenon. Because LCD TVs due to the limited light-emitting principle , the response time of more than 4 ms , and plasma TV, CRT TV 's response time to achieve microsecond . Although LCD TVs in solving problems on the tail made ​​some progress ,OLED Display Module but in quite a long time can not fundamentally solve the problem .

Common LCD TV screen with working class differences with liquid crystal displays

We used the LCD TV screen and in the industrial application of liquid crystal display devices have many differences, listed below for your reference .


1 LCD TVs due to the use of environmental requirements actions, the image is displayed after the rendering , you can not completely reflect the actual results. Because the display is usually observed as a static image , and thus the display color reproduction requirements higher than TV
, The discharge channel as a professional display in brightness , chroma processing and R, G, B should have a precise compensation processing circuit and delay circuit to ensure that the light / color signal and R, G, and B signals synchronized phase . If the resolution is mainly determined by the amplitude-frequency characteristics of the video channel , then the reduction mainly by the display of the red (R), green (G), blue (B) color signal and luminance signal phase of the three primary colors decision.

2 LCD TV screen is not self-locking component BNC input connector and DVI-D interface. If the color RGB BNC port industrial LCD monitor with multi-use interface and self-locking mechanism professional DVI-D video interface.

3 LCD TV screen dust heat without strict requirements . Industrial LCD monitor is designed without mechanical exhaust fan must be used to maintain air circulation and cooling , thus avoiding dust and fan noise issues , when the internal temperature rises for unknown reasons , the monitor from
Dynamic backlight control system to maintain the temperature below the maximum operating temperature.

4 in the installation, commissioning , especially on the components and the aging process requirements , monitor requirements are higher, the TV manufacturing machine aging in the pipeline is usually energized about 8 hours at room temperature , and the display of the machine age on the aging pipeline requires high temperature and humidity in a closed environment energized aging for more than 24 hours to ensure the stability of the whole machine. The display when closed-circuit monitoring system constitutes , usually 24 hours a day , 365 days a year of continuous uninterrupted electricity use ( and the TV is usually only a few hours a day of work ) , and some monitors may be more harsh application environments , which requires the display higher reliability and stability . In the selection of components , various components of the voltage characteristics , current, temperature , humidity and other displays used are higher than TV components ; compared with television , in the design, display current , power, temperature and resistance to electrical interference , capacity and electric shocks margin and the average time between failures are much larger than the TV , while the monitor must also use fully shielded metal housing to ensure electromagnetic compatibility and interference.

5 S232 serial LCD TV display using the remote control can only be achieved with the control command , and can not achieve industrial controls. S232 LCD display with serial control OLED Display, and open up to more than 200 control password , adapt to a variety of industrial environments , easy multi-monitor
When used without the remote control can control all display devices , and be able to assist, boot time , delay boot, self-test machines and other industrial requirements.

6 LCD TV display supports several television used only as specified in the instructions resolution , LCD TV as long as the resolution is based on several commonly used by civilian users was more effective treatment . LCD monitors and high reliability and high-definition display capabilities will ensure that you can compile a good record high-definition video, the video signal is displayed in the viewer a complete front . LCD monitor is the preferred choice of display, intuitive reflect the image quality features , combined with full 1920 x 1080 resolution selected , the display resolution for professional broadcast television display device resolution is automatically adjusted according to the display output.

7 LCD TV display all of the non-metallic material whole shell design , interior design plate line is the use of civil , mechanical aging is likely to cause prolonged power . Due to the use of environmental requirements , LCD TV screen machine part made ​​of metal shell material texture . And the internal plate lines are industrial design , not easy to aging ; embodies the concept of energy saving : low power design ; environmentally friendly materials. Neat appearance , ease of stitching industrial needs serial 20x2 lcd, the combination of installation.

Comprehensive analysis IPS panel

Advantage of viewing angle IPS panel is high , fast response , accurate color reproduction , high-end LCD panel products . And compared to PVA panel , using a dynamic IPS screen LCD TV line resolution can reach 780 . The static clarity , in accordance with the definition standards could meet the definition of 720 lines . The panel technology enhances the dynamic display LCD TV when watching sporting events, action movies and other sports programs faster access to better quality. Compared with other types of panels , IPS panels gently draw what is not prone to deformation patterns of water , so there are hard screen said.

IPS technology is currently the world 's most advanced lcd module technology . Compared with the traditional soft-screen LCD , hard-screen LCD IPS hard screen technology response speed faster , showing a motion picture and more smoothly.

It has the following advantages features:

1, the motion picture , two images without blur , motion picture , the response rate even three , dynamic picture , no offset 4 color , green energy-saving 5 , 6 viewing angle for the whole family to share , to restore the true color accurate picture

Flex Screen distinction

1 , touch Coding System lcd module screen , without waterlines phenomenon, can be recognized as IPS hard screen ; If there waterlines phenomenon, can be recognized as a soft screen .

2 , you can use a magnifying glass , liquid crystal molecular shape comparison chart , scaly direction toward the left is full pixel IPS hard screen .

Display does not light how to solve?

We often see in the network or forum that someone asked, "My monitor is not lit", "computer display does not light after power" and so such a problem, in fact, the display does not light the reasons are multi-faceted, but most of the main or by the other components due to the factors:

1, the monitor is not connected to the supply;

2, the display power is turned on, the computer host is not normally open;

3, the monitor to the computer directly to the signal cable is not connected properly, or the signal line failure OLED Module;

4, the problem of three black (according to the introduction of three issues to resolve, not repeated here).

Solve Step one: confirm whether it is the monitor power is not on. If the power, turn the power switch on the monitor, the monitor's power indicator will light up. Signal is issued when there is access to green light, no signal is emitted when the orange light access.

Step two solutions: Make sure the host computer and the monitor signal transmission between the cable is properly connected. If properly connected, and the display still does not light, we suggest that you replace a signal line to try again and if it still does not light, then that is not what causes the cable.

Solve Step Three: Make sure the computer mainframe's power is switched on. If the host computer is powered on, press the power button the monitor screen remains blank, then you should check the host computer's hardware is started. Should first check whether the host computer fan rotation, if the fan does not rotate, then that part of the host's power supply problem. If everything can turn the fan, you should check the memory is installed correctly. If you are properly installed, and the computer starts correctly, we suggest that the replacement of the normal use of the host computer to try. If the monitor can light after replacement128x64 lcd display, then that is the original fault monitor itself; if you can not light up, then that host computer problem.

If the problem is the monitor itself, then it should go to the respective brand service center for maintenance and inspection.

LNB OR Response Time

· LNB
LCD TV tuner, the official name is called tuner (tuner), is a television capable of receiving broadcast television signals, cable key device .

Traditional analog TV tuner is a complete analog receiver amplification, gating , frequency , Figure sound demodulation process , if there are aberrations and distortion which will make the received image and sound quality deteriorates . LCD televisions are digital television , the first analog television signal is changed to digital signal compression, transmission, reception , processing, storage , recording and control of receiving terminal via the digital TV tuner to a high frequency amplification, comparison processing , channel decoding and demodulation , and then back through the receiver circuit source decoding processing such as a restored image and sound , which occurs if the distortion error will cause an error , in excess of the range of the tuner can be regulated , can not receive the image and sound .

Digital tuner includes not only an important indicator of the original traditional TV , the phase noise, nonlinear index and lock time and other detection methods also a great difference . Analog TV tuner receives an analog television signal , the number of different high frequency television signal is converted into a fixed frequency output , moving to complete the spectrum . LCD TV tuner to receive digital broadcast television signals , not only to complete the analog tuner to be accomplished by spectrum shifting function, but also complete demodulation and channel decoding. The front end of a digital television receiver , a digital TV tuner digital device , so that in the production process than the analog tuner easy assembly and adjustment , the reliability and stability is greatly improved . Therefore, the digital tuner in technology and processes , there are many different characteristics of analog TV tuner , its performance is much better than analog TV tuner.

LNB performance on cable television signal reception quality of the system a great influence on the electrical properties should be selected high gain, low noise temperature coefficient tuner, tuner poor quality in different climatic conditions produce environments frequency drift caused treadmill phenomenon , so buy high frequency stability tuner to ensure system stability. custom lcd display Tuner band received signal is divided into VHF VHF (Very High Frequency) and UHF UHF (Ultra High Frequency) , the former for the frequency range of 30MHz-300MHz frequency band, which is the frequency range of 300MHz-3GHz bands. A tuner can receive only 1 channel cable TV signal , only with dual tuner LCD TV to be able to simultaneously receive two different television signals to be able to achieve two different channels of dual-screen display.

Response time

The response time of the LCD TV (response time) is a liquid crystal television is an important performance index , also called the response speed , the unit is typically milliseconds (ms), refers to the LCD TV input signal of each pixel reaction rate , that is, pixel from dark turn on or turn dark by the light of the time required . Since the liquid crystal in the display is driven by the voltage through the liquid crystal molecules resulting in deflection of different transmission rate, to achieve different degrees of light transmission and then to be composed of dots of different colors and then the entire screen , wherein the liquid crystal molecules is deflected by a voltage drive physical reaction process , take some time to complete, so the lcd module TV to get the signal in every point , the need for a certain time to change the yawing motion of the screen .

What is the digital TV display device

Digital TV display device is a digital television video signal for displaying a digital television system terminal equipment referred to,Graphic LCD Module also known as the digital TV display .

Indeed television display device is commonly known as the home of the TV. TV according to the display principle be divided into different types , the type of TV technology is now the mainstream with a cathode ray (CRT) tube televisions , liquid crystal (LCD) televisions , plasma (PDP) TV , an organic light emitting diode (OLED) TV machine and rear projection TV .

Wherein the cathode ray tube televisions and projection televisions are bulky type of TV , and LCD TV , plasma TV , an organic light-emitting diode TV is a smaller type of TV , lcm module also known as flat-panel televisions.

Why get dizzy watching 3D

3D images will enable people to enjoy the full sense of the scene image , but there are also eye fatigue , OLED Display feeling vulnerable and other issues. METI has decided to develop relevant standards , so that the image makers do not make too much emphasis on three-dimensional image .

3D TV imaging principle is to use shutter glasses were quickly closed, the left and right eyes see different TV screen. However, due to the existence of the phenomenon of persistence of vision , to watch 3D television programs , the human eye will feel "position some distance but overlapping screen ", which is caused by 3D " ghosting " and directly lead to " dizziness " is another factor .lcd module  And in a long time to watch a soccer match or a quick intense dynamic picture , dizziness, and fatigue caused by the degree will be intensified.

Seven strokes teach you to love TV

Nowadays, LCD TV has become people's lives than the essential part , but also the highest of the highest frequency of use , and then how to care for the life of the " big plaything " may become the subject of great concern , the following let together we look at it, whether you are in life to cherish your TV like it !

1 do not readily "off" TV

Let us not waste energy, but to pay attention to weigh the power is turned on the TV Life. As we all know , the backlight for the LCD TV consumes all accessories in life the most serious one part , it and our home use fluorescent tubes are very similar .

So, it 's life and times also ignite a great relationship . Start when the warm-up and high-voltage pulse sputtering cathode electron substance increases, shorten lamp life. If you develop a habit of readily turn off the TV , four times a day to open computing , lamp life will be reduced to the original 1 /2.

(2) Avoid prolonged work

This one is not with the above considerations conflict . In the case of ultra-long work , the heat in the LCD TV accumulating inside the body , which is not enough for the other electronic components as much of a threat , but it is possible to burn the liquid crystal panel , thereby forming a large area of ​​dead pixels .

3 professional way to clean

Due to static reasons, LCD TV screen surface is very easy to collect dust . But clean water is a very unwise way to clean. First, the general effect is clean , and easy to leave water marks . More importantly, the liquid crystal is very easy because of moisture and cause permanent

Persistent damage ( If water droplets penetrate the screen , avoid electricity, let moisture in a warm environment slowly evaporate.

4 Avoid scratches, twisted or hit the surface of the LCD screen

Useful for many people pointing fingers on the screen of habit, this is irrelevant for CRT TV , LCD TV, but may cause fatal damage , but see themselves and their children and their toys , any impact on the LCD screen , scribing will bring direct damage, and most likely to make entire screen scrapped.

5 . Still images can also damage the LCD screen

At present, many LCD TVs with digital photo browsing, but for a long time for a picture display may cause damage to the LCD screen . When the machine is not used in a long time , to avoid the machine displays a screen point , best to turn off the machine . Although the LCD TV calories than CRT TV has been reduced a lot, but the problem is more LCD TVs degree temperature sensitive , long- uniform screen will display the fragile components to aging , which may or may not burn the TV screen , but it may TV will be more dead pixels. Only bad point is always a white or black pixels, can not be repaired . OLED Display To address this problem, some products specially set up display a still picture for too long, the TV automatically dimming feature to protect the LCD screen

6 Water is a major killer of the LCD screen

LCD TV on the humidity is very clear sense of its more stringent requirements for air humidity , if the humidity is maintained at 30 % to 80 %, and the LCD is working properly , but if the indoor humidity is higher than 80% ( southern region ) , LCD TV internal condensation might have occurred, this condensation phenomenon, may lead to leakage and short circuit LCD TV phenomenon , but also serious and even burned TV .

7 Do not disassemble repair LCD TVs

You can not own repairs to CRT TV , lcd module TV mechanical sophistication , as well as the fragility of the core screen LCD TV on the demolition of unauthorized become a TV that has the potential to cause more harm behavior , even a small metal shavings shedding can cause serious consequences. Meanwhile, LCD TV backlight assembly of some components will be about 1000 volts with a high pressure, this pressure can also cause damage to the human body .

Daily electrical power small coup

Suddenly, quietly approaching summer , by the impact of summer , many consumers may choose to stay home rather than go out shopping in . At this time watching television , eating cold is really very cool . Here, the projection of the times we must also remind you that summer comes, electricity tariffs may also have increased. Take the flat-panel TVs ,TFT LCD Module  even the standby condition, one day off each will produce electricity.
Some residents convenience in order , do not pull the electrical plug , switch off the appliance only with a remote control , which is home standby phenomenon . This clean-up , the electrical although not running , but in fact there are standby power consumption . It is understood that each household electrical appliances in standby mode, power consumption is generally switched power for about 10% , about 5 - 15-watt range. If a family has a daily average of 56 units electrical plug sticking out , then they will just spend a day of electricity , a month is 30 degrees.
The role of a kilowatt inconsiderable , kilowatt make 25 watt bulb continuously lit 40 hours , allowing ordinary TV open 10 hours. If a power supply range from more than 170 million households meter users , in accordance with saving a kWh of electricity per day , a month is more than 5000 million degrees, almost the equivalent of an ordinary county province one month 's electricity consumption. So, starting from the details may energy saving.
Energy saving is not difficult, the user home appliances when not completely turn off the power ; using multifunctional socket with switch TFT LCD Module, in addition to outside the refrigerator , the front -click multi-outlet is connected to the switch will turn off the appliance can be a good achieve energy savings.

How capacitive touch screen applications handle the noise problem

Touch screen device may in the day by many different noise sources, both internal and external noise noise is also included. Charger and monitor noise is a common problem in today's two most noise sources. As the market becomes more and more devices on the charging light, noise increases, the challenge will only become more difficult to manage. In addition, many other everyday objects will produce noise, causing interference, such as radio signals, AC power and even fluorescent ballasts. In the presence of noise, the low performance capacitive touch system reports position may be distorted, thereby affecting the accuracy and reliability.
Today's touch screen controller uses a variety of methods to improve signal to noise ratio, and filter out the bad from the noise in the data, these methods include on-chip high-voltage transmission signal generation, professional hardware acceleration, high-frequency transmitter, adaptive frequency hopping technology and Saturation control techniques. However, the touch technology continues to sustainable development,lcd module involving aspects include: how to use these features touch controller, how to dynamically adapt to the presence of noise in the system, and how changing environmental conditions and accurate touch tracking.
Injected noise impacts include large jitter (for non-mobile finger touch coordinates reported vary widely), but no finger touching the screen with a finger touch of false positives, do not report when the finger touch finger exist, and may even cause the device is fully lock and so on. If the touch-screen phone, for example, which means you can not unlock the phone (because you can not report a finger manipulation), or due to jitter or false touch while dialing a wrong number (the middle of the night like a friend's phone call, the result was wrong was allocated Boss, this problem is not small). Figure 1 shows the use of the market's best-selling smartphone finger tracking test results obtained (for example, using a finger to draw a circle). As the noise increases, the finger on the panel position reports (as shown in blue) to be wrong, and will detect errors in the panel of the touch (other colors shown).
How to deal with touch screen controller noise, will the quality of the user experience touch UI significant impact. Touch in noisy conditions, poor performance may result in customer dissatisfaction, thereby increasing the amount of return. COG LCD Display Since the difference between the various noise, touch screen controller to be able to detect, differentiate and respond to these noise, especially the two most likely cause of the problem noise sources: charger and display noise.

Factory network video surveillance system design

System Overview
In recent years, the popularity of the network and deepen in our development, enterprise information construction continued to deepen, enterprises are gradually turning to focus on the use of network and computer management, production , sales, lcm module logistics , service and other important stage of large amounts of data . All walks of life have accelerated the construction of information network platform , most companies have been or are laying computers within the enterprise LAN ; Meanwhile, the network has become an emerging advanced applications provide a good platform. In the modern business management, as security requirements increase, the monitoring system plays an increasingly important role , the existing and network systems to be built together with the monitoring system can not only minimizes renovation project cycle , while avoiding duplication of investment funds and improve the network resource utilization.
In the modern enterprise development process , in addition to establishing a comprehensive, scientific and effective management system and incentive mechanism, establish a comprehensive network video surveillance system factory obvious increasingly necessary . Factory plant a larger scale, complex production and management departments , require high safety factor . Among the many workshops, logistics channel , special outdoor areas and functions to achieve on-site monitoring and dispatching a combination of production , will greatly improve the level of intelligent management of the factory . Therefore, in the factory installation of a network video surveillance system has always been essential to many production companies or factories administrative measures. Shenzhen Wave-particle Technology Co., Ltd. graphic lcd display module provides a full range of professional network video surveillance system equipment for plant monitoring system solution designed with rich experience.

LCD splicing screen installation

As good color LCD splicing screen electronic manufacturers in addition to producing products, mostly have a professional construction team. Most manufacturers will have a dedicated installation team, because if it is for contractors to do,OLED Display Module  and users will have barriers, can not really understand the user's actual needs.
During the installation process, generally the use of environmental special attention. Environmental temperature and humidity and the size of the space before installation is the first note. DLP mostly made of resin screen, so it is necessary to have a stable environment, temperature and humidity, respectively, at 25 ° and about 65% for the best, the temperature is too high, given the principle of thermal expansion and contraction, the screen easily from the package.

The use of the DID lcd module splicing screen, so it has little impact on temperature and humidity. And DLP rear projection unit 1.5 m thick box, the installation requires a distance from the wall, but some use of the environment is not good, so the box is not very good heat dissipation, it is recommended that users install air conditioning, to ensure product life.
In addition, the installation site surface roughness and dust will affect the results.

Large-screen LCD splicing system Digital Natural Image engine

Digital Natural Image Engine
With a positive development and many years of experience , finally got to create vivid images of fine detail and high contrast natural influence proprietary technology, which has the following features:
3D dynamic optimization to eliminate noise
3D dynamic optimization is the role of quality improvement and noise reduction . Whether it is dynamic or static images , 320x240 lcd module can ensure crisp, clear picture .
Show the natural hue color optimization
For each frame and scene , color optimization functions are calculated separately the red, green, and blue saturation and determine its brightness standards, the overall brightness of the screen to be preserved , the screen showing a realistic and natural picture.
Strengthen the chiaroscuro contrast enhancement
DNleTM technical solution to a common technology in enhancing the contrast of interference signals and flashing also magnified the problem , which the contrast is divided into one million standard, low temperature lcd any signal can automatically match the most suitable contrast.
Details of the performance enhancements to eliminate jagged edges
DNleTM can automatically analyze and selectively enhanced need to enhance the details , and can effectively eliminate the slight noise that may affect the quality and interference , showing the picture vivid and lifelike.

New Concept liquid crystal display technology

Existing backlit LCD technology can not completely blocked , leading to not display all black , hindering the improvement of contrast . In the use of light , the liquid crystal polarizer behind 50 percent of the light will be blocked , and then the color filter will block 30% , leading to the final utilization of less than 10% .
According to Microsoft and Washington State University scientists recently published in the journal Nature papers, new technology allows lcd graphic display true black and greatly increase the contrast ; while the backlight utilization increased four -fold , to make the display brighter. In addition, the technique can use the existing LCD production line manufacturing , the cost is not too high.
Specifically, the technology called "telescopic pixel" stretching of pixels, each pixel by the sides of the main structure composed of a small mirror . Was similar to the shape of the primary mirror of annular discs , diameter of 50 microns , the intermediate pore size of 20 microns . And a second small mirrors are located just behind the orifice diameter of 25 microns. The mirrors in opposite directions , light reflected by the primary mirror , the secondary mirror illumination , imaging revealed through the hole . When in the closed state, the primary mirror is flat , the light irradiation on the secondary mirror can not , will not have any light revealed that to achieve full black. To display a color which , in the main mirror electric charge applied , bent bowl , focus on the secondary imaging lens through hole .
Allegedly, this technology not only completely solve the problem of a full black display , and light utilization rate reached 36 percent , much higher than today's LCD 9% efficiency. Power on the primary mirror deformation time is very short response times can be achieved 1.5ms.
Although in the current era of high definition , in a panel installed on millions of small mirrors looks very weird. But research people still said that this principle display panel can not only achieve high resolution, and the use of raw materials are very inexpensive , and can be in the current lcd module production process through the transformation of mass production.

LCD is also different

The moment of the LCD screen body mainly uses TFT (ThinFilmTransistor) technology as the underlying drive technology to achieve high-speed, high brightness, high contrast, color reproduction, wide viewing angle display, while in display technology , there are now often used in TN screen , IPS screen , CPA screen , PVA and MVA panel screen, which is used widely TN screen is also the cheapest , the disadvantage is small and pseudo-color viewing angle , which have a modified version of the TN + film panel . The main difference between these screen contrast , viewing angle , color performance and speed of response show detail , it should be said that their own merits. Which IPS ( hard screen ) , with better overall display, with high viewing angle , fast response , accurate color reproduction , etc., more serious drawback is leaked , black pure enough .
A variety of display technologies against each other at the same time , "LED LCD screen" is intentionally or unintentionally vague concept , and as a selling point to the market . In fact, LED is the acronym for Light Emitting Diode LightEmittingDiode , which itself can be luminous and colored , can be applied directly as a display unit , has a good price , and now the vast majority of all outdoor advertising screen with LED screen, but because of the direct use of LED as the display unit pixel is too large and can not be done at close range high-definition display , it can not be applied in the security industry . Back to recent hot LED LCD screen , which displays as a principle or through the liquid crystal light valve control pass , but different from the traditional CCFL (cold cathode fluorescent lamp ) , which uses LED as backlight LCD screen . Because the LED backlight can be done uniformly distributed and therefore able to achieve a good local dimming , and its wider color gamut backlight , the relative CCFL light source, which has a longer life, low light decay , energy saving and environmental protection, and effectively eliminate the black edges and other visible advantages , but also to some extent reduces the distance patchwork .
It should be noted that, although the mosaic screen of the display depend on the quality of the liquid crystal panel, a single screen , but the choice of video solutions mosaic screen (DSP) will directly affect the merits of the input video image decode the picture quality.

Origin of polarizing

These iodine compound crystallizes very small, so in practical applications has been greatly restricted , Dr. Herapath spent nearly a decade to study how to make a larger polarized crystals , but he did not succeed . Therefore, rand that this road may not be feasible , Coding System lcd module so he used the following methods:
● Rand grinding the crystals large particles (ball mill) into tiny crystals and that these small crystals suspended in the liquid.
● Insert a plastic sheet into the suspension , then placed in a magnetic field or electric field orientation .
● this plastic film is removed from the suspension , the crystal will be polarized with cover on the surface of the plastic sheet .
● plastic sheet to stay in this magnetic or electric field, drying becomes a polarizing film .
Rand is a polarization many small crystals , a regular arrangement of well , which is equivalent to a large polarizing crystals. He applied the method described above ,128x64 oled in 1928, made ​​the first successful advent of the polarizing film , J film. The disadvantage of this method is time consuming , costly and fuzzy opaque. It has been found that the manufacturing polarizing Rand several important factors: ( 1 ) iodide ( 2 ) Polymer ( 3 ) Orientation (Orientation). Through continuous research and improvement , Rand finally in 1938 to the present invention, a method of manufacturing is still in use , the basic principle will be discussed in the next section .

Prevent static method

This article describes, in order to effectively combat and prevent electrostatic discharge (ESD, electrostatic discharge), must be the right way to use the correct equipment. As a series of strong loop ESD prevention, monitoring and ion devices can now ESD as a process control problem.

Electrostatic discharge (ESD) is the electronic circuit board assembly and damage to components of a familiar source of underestimation. It affects every manufacturer, without any of its size. While many people think they are in an ESD safe environment to produce products, but in fact, ESD-related damage continues to bring the world's electronics manufacturing industry costs billions of dollars each year.

What is ESD? Electrostatic discharge (ESD) is defined as, to or from the original has been static (fixed) charge (electron deficiency or excess) discharge (electron flow). Charge under two conditions are stable:

1 When it is "trapped in a" conductive but electrically insulated object, such as a metal with a plastic handle screwdriver. 2 when it is staying in an insulating surface (such as plastics), can not flow in the above.

However, if charged with a sufficiently high electrical insulation of the conductors (screwdriver) have opposite electric potential near the IC (IC), the charge "jumper", caused electrostatic discharge (ESD).

With high strength ESD occurs very rapidly, generally produce enough heat to melt the semiconductor chip's internal circuitry, the electron microscope look like bullet kid blow out, causing immediate and irreversible damage. More serious is that this harm is only one tenth of the situation bad enough to cause the entire test in the final component failure. The other 90% of cases, ESD damage caused only part of the downgrade - means that components can be damaged unaware through final testing, but only in the delivery to the customer site after premature failure. The result is the most damaged reputation of a manufacturer to correct any manufacturing defect where most of the consideration paid.

However, the main difficulty controlling ESD is that it is not visible, but can reach the point of damaging the electronic components. Produce can hear "tick" sound of the discharge requires considerable accumulation of approximately 2000 volts larger charge, whereas 3000 volts can feel like a small electric shock, 5,000 volts can see the sparks.

For example, as a complementary metal oxide semiconductor (CMOS, complementary metal oxide semiconductor) or electrical programmable read only memory (EPROM, electricall programmable read-only memory) of these common elements, SPI lcds respectively, and 100 is only 250 volts volts potential difference in ESD destruction, but more and more sensitive modern components, including the Pentium processor, as long as 5 volts can be destroyed.

The problem is caused by damage to the daily activities of the composite together. For example, from the factory floor through the vinyl on the floor surface and the friction between the shoes. The result is a pure charged object, accumulation of 3 to 2000 volts of charge depends on the local humidity of the air is quite.

Even workers stage formed by the natural movement of the friction can produce 400 to 6000 volts. If you open or packaging foam box or bubble bag PCB period, the workers have been processed insulator, Graphic LCD Display then the workers' accumulated net charge of the body surface can reach about 26,000 volts.

Therefore, as the main ESD damage sources all incoming ESD protection zone (EPA, electrostatic protected area) staff must be grounded to prevent any charge accumulation, and all surfaces should be grounded to maintain all things are in the same electric potential, to prevent ESD occurs.

Clean clothes cleaning

1, clean clothes cleaning
Clean clothes are suitable for electronic, optical instruments, pharmaceuticals, microbial engineering, precision instruments and other industries have special clean overalls and antistatic properties, and its lining is usually embedded in a conductive wire woven synthetic fabrics.
Clean clothes management is the most important part of cleaning, even though the fiber itself is difficult to clean soiled fibers, but how to maintain an important factor, that is a cleaning method. If using ordinary washing method, of course contrary will be smudged. Therefore, a special method must be used. Clean overalls, from the management to consider, when the cleaning must be carried out in a clean room cleaning Jie slightly decorative packaging.
Normally clean overalls washed once a week at least, some of the types of jobs that require high even washed once a day.
In ordinary cleaning the room, will be attached to dust and bacteria, as well as contamination by the cleaning agent. In addition, the packing and handling process, there will be attached to dust and microbial hazards.
Clean overalls cleaning generally rely on the professional cleaning company to clean, its representation cleaning process see chart 1, in the clean room cleaning process should pay attention to the following:
(1) new sewing clothes can be directly washed clean,OLED Display and the recycling through the oil spill clean overalls, carefully remove the oil before washing procedures.
(2) To scrape before washing, damage and other accessories hasp inspect the defective for repair, replacement or retirement.
(3) must be used in clothes than clean room clean and high clean room cleaning, drying, packing.
(4) wet, dry cleaning water to be filtered, the solvent should be used after distillation point with less than 0.2μm pore size membrane, according to need more than one filter.
(5) In order to remove soluble contaminants, washed with water, and then the solvent was distilled for the final washing, remove the oily contaminants.
(6) Wet washing water temperature is as follows:
Polyester fabric 60-70C (maximum 70C)
Nylon 50-55C (maximum 60C)
(7) In the final rinse water permeability, the antistatic agent can be used to improve the anti-static properties,Serial Lcd Display Module but the choice of antistatic agent should be a good combination with the fiber, no dust off.
(8) with hasp overalls should be washed in engaging state.
(9) the washing dedicated clean air circulation system for drying.
After drying, the washing clean room dedicated folded, into a clean bag or nylon polyester, the double packaging on request, can also be vacuum plastic, packaging material is preferably a material with good anti-static. Since the folding process most prone to dust, thus folding process must be in a high level for the purification of space, such as the 100 clean overalls folded package should be carried out in the 10 environments.

The basic structure and function of FPGA

Field-programmable gate array (FPGA) emerged in the mid 1980s a new kind of user-programmable devices, programmable logic devices and general different, FPGA's high integration, logic implementation ability, better design flexibility. The basic structure of FPGA programmable resources typically contains three types: a programmable logic block (CLB), programmable input and output blocks and programmable interconnect. Programmable logic function blocks (CLB) is a realization of the user's base unit, they are typically arranged in an array of regularly, distributed throughout the chip; Programmable logic output block to complete the on-chip interface to the external packaging of the leg, often around the array arranged in around the chip; programmable interconnect includes various lengths and the number of programmable segment connecting the connection switches, they will each programmable logic block, input and output blocks are connected together to form a specific function of the circuit.
As a result of the different switching elements, FPGA reflect different programmable features, some of which are one-time programmable, others are reprogrammable.Graphic LCD Module One-time-programmable FPGA using inverse fuse as switching elements, when the program ends with a reverse voltage fuse, the fuse will reverse from high impedance to low impedance in order to achieve the connection between the two points. After programming, the operating voltage even if the removal of such FPGA configuration data is retained. Since only be programmed once, so it is more suitable for styling products and high-volume applications. In addition, lcm module it is also commonly used in high performance and confidentiality requirements of the occasion. Reprogrammable FPGA SRAM-type switch or flash EPROM controlled switching elements. SRAM-type switching element comprises a transistor composed of a RAM, and five called PIP (programmable internal connection point) of the transistor. PIP control of each cabling channel connections, PIP and by their next of RAM unit control. RAM cell is stored PIP-off information, which code is the system is powered by the external written to the internal RAM in FPGA. Power is cut off, RAM data will be lost, so the use of the FPGA SRAM-type switch is volatile, and each time re-power, FPGA should be restructured. Outstanding advantages of SRAM-based FPGA is programmed repeatedly, the system is powered on, the FPGA loading different configuration data, you can make it perform different hardware capabilities. This configuration changes can even be running in the system, dynamic reconfiguration of system functions.

One kind of cursor display with an LCD drive control chip design

LCD monitors because of its small size, light weight, low voltage, low power consumption, with a very broad market prospects, including small and medium-size LCD STN LCD in the field of a large market share, has its unique advantages. STN LCD big screen can be used in notebook computers, word processors, etc. color, small STN LCD screens commonly used in cellular phones, PHS (Personal Handy System), pagers, etc. STN TFT LCD Module controller chip requires a special driver more control properties, such as liquid crystal display device of the normal display, cursor blink and shift display. Depending on the size of the LCD driver and the number of the desired function, the drive control chip depending on the complexity, mainly in its internal RAM, ROM size, the complexity of the instruction decoding circuit, the internal timing and power circuits, External drives can be reflected in the number of rows and columns of the port, with the MPU interface functions.
This design of LCD drive control chip is a common character dot matrix Character LCD Modules controller IC. The size of the chip belongs to LSI, prepared with low-power CMOS technology. We designed the LCD drive control chip has the following main functions: ① the form of providing bus MPU interface; ② with complete logic control circuit and timing generator control various display functions. Character display format is 5 × 8 dot matrix (208 kinds), 5 × 11 dot matrix (32 kinds), there are three display: line 5 × 8 dot matrix, two lines of 5 × 8 dot matrix, line 5 × 11 dot matrix , with the cursor display function and display characters and cursor shift function; ③ management and control of RAM and ROM, MPU easy access, easy to store and provide the necessary display character; ④ to provide scanning LCD display timing signal COM and SEG display data transmission , the output drive signal 16COM × 40SEG, from the sheet by attaching drive display 80 characters; ⑤ provides a fully functional control instruction set, easy programming the MPU.