prints the results of a computer's operations or intermediate results on paper in a prescribed format, in Numbers, POS Printer Brazil, symbols, graphics, etc., which a person can recognize. The printer is developing in light, thin, short, small, low power consumption, high speed and intelligent direction.
With the rapid development of the Internet, some people predict that the paperless era is coming and the end of the POS Printer Kenya is coming. Yet global paper consumption is growing at multiple times a year, and printer sales are rising at an average rate of nearly 8%. All this suggests that printers will not disappear, but will grow faster and faster, with a wider range of applications. From 1885, the world's printer, and then all kinds of needle Mini Portable Printer, inkjet printers, and laser printers, they are in different s the excellences, today let's look for the tracks of history, from technology, brands and products, application market and target customers from three aspects, review the brilliant history of the POS Receipt Printer Driver, at the same time to spray the future trend of the development of a simple analysis.
Classification of printers
Portable Printer are small, portable printers designed to meet users' need to print on the move. Widely used in traffic police law enforcement and other office areas.
RS232 has a long history of cable communications technology. Portable Printer Supplier and label printers are widely used, but are generally not used to receive printed data, but for debugging
Ethernet Ethernet communication, high transmission speed, easy access, used for printer communication interface.
Inkjet printer
The basic working principle of Small Portable Receipt Printer is to first produce small ink drops, and then use the inkjet head to guide the small ink drops to the set position. The smaller the ink drops, the clearer the printed picture will be. The fundamentals may seem simple, but they're not that simple. Just as the principles of calculus are not complicated, complexity is how to apply them. The following describes several technological breakthroughs in inkjet printers with historical significance.
Introduction to laser printers
POS Printer Chile were born out of laser phototypesetting technology in the late 1980s and became popular in the mid 1990s. It is a Bluetooth Printer China output equipment combining laser scanning technology and electronic photography technology. Its basic principle is from binary data by computer information, through the video controller is transformed into video signal, again by video interface/control system, the video signal is converted into a laser drive signal, and then produced by the laser scanning system with character information of laser beam, finally make the laser beam by the electrophotographic system imaging and transfer to the paper. Compared with other printing equipment, the laser printer has the advantages of fast Printer Manufacturers speed and high imaging quality. But the cost is relatively high.
The composition, design structure, control methods and components of the control devices and components required by the working process of laser printers will vary from manufacturer to manufacturer.
Mini Portable Printer a laser beam, the mirror into the acousto-optic deflection modulator, at the same time, by the binary from computer graphic dot matrix information, from the interface to the glyph generator, form the glyph of binary pulse information needed, produced by synchronizer signal control 9 high frequency oscillator, then through frequency synthesizer and add to the acousto-optic modulator, a power amplifier for modulation by mirrors into the laser beam. The modulated light beam is shot into the multi-facet rotation mirror, and then it is focused by the wide-angle focusing mirror to the surface of the optical drum (toner), so that the angular velocity scan becomes linear velocity scan, and the whole scanning process is completed.
Photosensitive drum is the core part of laser printer
Photosensitive drum is the core part of laser printer. Panel Receipt Printer is a photosensitive device, mainly made of optical materials. Its basic working principle is the process of "photoelectric conversion". Small Portable Receipt Printer is used as a consumer material in laser printers, and it is also relatively expensive. Photosensitive semiconductor has the common character of semiconductor, if be stimulated by heat, after doping, change electrical conductivity. In addition, it has a "photoconductive" property that no other semiconductor has. The conductivity of a photosensitive semiconductor can be increased by several orders of magnitude when exposed to light. In terms of energy bands, electrons in its valence band absorb the energy of light and jump into the conduction band, producing electron-hole pairs. This pair of electron-hole pairs produced by light is called "photo-borne carrier". As the number of "photo-generated carriers" in a photosensitive semiconductor increases, its electrical conductivity increases. This improved conductivity after exposure to light is called "intrinsic photoconductivity". In practice, the photosensitive semiconductor material needs to be doped before it can be made into the semiconductor material used in laser. Therefore, in addition to the intrinsic photoconductivity, Portable Printer Supplier is also necessary to have the properties of the impurity photoconductivity formed by electrons or holes on the photoexcited impurity level. In some photosensitive semiconductors, "impurity photoconductivity" plays a major role.
The "carrier mobility" (Portable Printer China) in an object can be changed to different degrees after being irradiated by light. The "conductance" that marks an object's ability to conduct electricity is equal to carrier density times mobility. Mobility is increased, conductivity is improved, and conductivity is determined by the values of intrinsic photoconductivity, impurity photoconductivity and mobility, but under certain conditions, some of the factors are the main factors.
All kinds of optical conductors used in practice have different sensitivity to light. The conductivity of a photoconductor is directly proportional to its sensitivity to light. So the optical inductance of a photoconductor is very important. Light conductors have different sensitivity to light. A light conductor that is sensitive to only the light of a particular region of the spectrum may lose its light sensitivity if it leaves that region.
A photosensitive semiconductor forms an absorption peak for light in the range of light wavelengths suitable for it. Photoconductivity is best in this peak range. It also has to do with illumination. The higher the illumination, the more carriers produced, the higher the photoconductivity. However, each optical conductor has different characteristics, so the illumination required to achieve the same photoconductivity index under the same conditions is different.
The common photoconductive materials used for photosensitive drum are cadmium sulfide (CdS) and Se-As. Organic photoconductive material (opc), etc.
Laser printers -- translation
(1) data translation: in order to print complete words and images, in addition to the function of the laser printer itself, the content to be printed must be edited into a computer language with a certain format by using a word or image processing software or graphics processing software. The content described is determined by computer editing software and has nothing to do with Thermal Portable Label Printer Manufacturer. When we select the print command, and determine the print button, the computer sends the edited data through a printer interface to a printer, the printer driver to print the content of explanation, and change printer can identify the language (language) is also called the printer, the printer to print out has been edited according to their own language text or image.
Different types of Thermal Portable Label Printer use different drivers for different printing languages. There are also compatible printer drivers. Production of laser printers, commonly used standard printing language PCL5 or PCL6.
(2) data transmission: there are many communication ports between the printer and the computer, and the common one is "serial port" or "parallel port". EP P/ECP (KIOSK Printer China) is referred to as Enhanced /Extended parallel. "Serial port" is seldom used because of its slow speed. Others, such as the SCSI interface, are mostly used on higher-end printers because of their speed. Other printers communicate with computers using the video interface (VDO), which is different from other interfaces. Its data is done by another "video conversion card", but because it shares memory with the computer, the computer is required to have enough cache space. The general printing typesetting industry USES this interface printer more. Some high-grade printers have multiple interfaces and can connect multiple computers at the same time. Many of these Portable Printer Supplier come with faster USB ports.
When the printing controller receives the data from the computer, the printer generally adopts two ways of working: one is to send the data directly to the interpreter for printing, which is called "segment working mode". Printers that work in this way do not need a lot of cache and memory. Ordinary printers usually work in this way. The other is to store the transmitted data on the internal hard disk of the printer and print it out whenever you need it. The advantage is that when many users share a printer, they can simultaneously issue a print command without having to wait and save the waiting time for data communication, but it is also more expensive.
The dot matrix image of the laser printer
A Small Portable Receipt Printer prints a word or image that, if viewed under a magnifying glass, is made up of many white dots and black dots (Panel Receipt Printer), similar to ordinary dot-matrix prints. The former is to control the opening and closing of the laser beam to realize the array arrangement, while the latter is to achieve the array arrangement by printing the pin strike.
Raster image is a kind of digital image of video. The raster converter in the printer is required to rasterize the data of video and convert it into the dot-matrix image printing used by the printer. The so-called raster image is an image composed of independent points. An image, as printed in a newspaper or displayed on a television screen, is a raster image.
The point array arrangement of the Portable Printer China is a square array controlled by binary data. Each point corresponds to a binary digit. The operation controller controls the laser to shoot a laser beam onto the surface of the photosensitive drum. To print a word or an image, you need a lot of pixels. Therefore, the higher the number of pixels per unit area, the higher the resolution of the print. If a laser scanner, along the axis of the drum, shoots 300 dots per inch, and the drum is driven by the main motor to rotate at a constant speed of 1/300, the KIOSK Printer China can print text or images at a resolution of 300 x 300 dpi per square inch. The output accuracy of high - grade laser printer can reach 2400DPI. The image is formed from pixels, and it is also completed by sound and light modulator, high frequency driver, scanner synchronizer and optical system.
