A monitor with TV and what is the difference? Why can not the TV as a monitor to use?
TV monitor in a simple but functional than in performance, but requires demanding than the TV, to reflect the following three points:
First, the image sharpness: As traditional TV stations to receive the RF signal emitted, the signal corresponding to the bandwidth of the video image is typically less than 6M, which is usually greater than 400 TV lines of resolution, requiring a monitor high image resolution, so the professional circuit in the channel on the monitor than traditional TV in terms of compensation and should have the bandwidth to enhance the circuit, so that a wider passband, higher image resolution.
Second, color reproduction, clarity if the main video channel from the amplitude-frequency characteristics of the decision, the reduction degree mainly by the monitor in red (R), green (G), blue (B) three primary colors of color phase signal and the luminance JVC GZ-MG21U Battery Charger signal is determined. As the monitor is usually observed as a static image, and thus the requirements of the monitor color fidelity higher than the TV, so the video amplifier channel professional monitors in brightness, color processing and R, G, B treatment should have accurate compensation circuit and a delay circuit to ensure that the light / color signal and R, G, B signals of phase synchronization.
Third, machine stability: monitor closed-circuit monitoring system in the form, usually 24 hours a day, 365 days a year using a continuous uninterrupted power (and the TV is usually only work a few hours a day), and some monitors application environment may be more difficult, requiring higher reliability and stability of the monitor. Compared with the TV, in the design, monitor current, power, temperature, and anti-radio interference, electrical shocks and failure-free margin and the average use of time are much larger than the TV, but must also monitor use of fully shielded metal enclosure to ensure electromagnetic compatibility and interference performance; in the selection of components, and monitor the use of components of the pressure, current, temperature, humidity and other characteristics of various components used to be higher than the TV; In the installation, commissioning and machine components, especially the aging process requirements, monitor requirements are higher, making the TV the whole time on the aging temperature is usually in the power line about 8 hours, and monitor machine you need to heat aging, humidity aging lines on the closed environment of the aging power more than 24 hours, to ensure overall stability.
Second, interlaced and progressive Monitor Monitor What is the difference?
Mainly refers to interlaced and progressive scan CRT monitor. Monitor image is two-dimensional image, and its reproduction process is two-dimensional input image into a string of pixels in the horizontal scan through the screen from left to right to achieve the uniform movement; vertical scan will be horizontal scan line at a constant rate by the vertical movement. Interlaced scanning refers to a scanned image Nikon EN-EL11 Battery Charger is divided into two, the first field (odd field) 1,3,5 and other odd-numbered scan lines, the second field (even field) even-numbered scan lines 2,4,6 and so on, two occasions together to form a complete image (ie one). So for the PAL system, the 50 scans per second, field, field frequency is 50HZ, the frame rate to 25HZ; for NTSC, the field frequency is 60HZ, the frame rate of 30HZ, although in the human visual screen to reproduce the is a continuous image, but the odd occasion even field switch will cause the screen flashes and significant effect of line spacing line. The progressive scanning refers to the scan line to scan line by line in sequence mode. Interlaced monitor with the image of poor quality, low-resolution, large and flicker noise and serious shortcomings. Progressive scan monitor is interlaced in order to eliminate the defects, the analog video signals into digital signals by digital color decoding, storage and control using digital signal technology to achieve a signal line or re-use (ie, slow read, high-speed readout) of 50HZ progressive scan mode, or further increase the frame rate to achieve 60HZ, 75HZ 85HZ so progressive scan mode. Progressive scan technology due to the input signal through the A / D converter into a digital signal by the digital video decoding and digital image processing circuit for horizontal and vertical scanning process, the channel bandwidth is greatly enhanced (up to 10MHZ-20MHZ), greatly improving clarity noise greatly reduced, while eliminating the progressive display line spacing between lines and line flicker, and frame rate of increase (such as 60HZ-85HZ) is to reduce or eliminate a large area flicker.
Therefore, progressive monitor, once available, will be welcomed by the users. Of course, as a progressive monitor the use of a line or re-use, frequency than interlaced line doubling, from 15625HZ into 31250HZ, 75Hz line frequency of progressive 46875Hz. Line frequency increased, the line output level of stability and reliability will be severely tested, the whole design and manufacturing costs greatly increased, so the machine's price is higher.
Third, the nominal 100Hz monitors currently on the market is interlaced or progressive?
If the problem 2 above, due to obvious defects 50HZ interlaced monitor, we can be achieved through the fold line 50Hz progressive scan, or times of market means to achieve 100Hz interlaced scan, the other can also fold lines + frequency (50Hz field * frequency * 1.2 or 1.5) form a 60Hz or 75Hz progressive scan line by line, but so far, we have yet to find domestic and foreign R & D and chip manufacturers are offering multiple lines + times the field that is 100Hz progressive technology and chips, in addition, To achieve 100Hz progressive displays, CRT deflection coil is exposed to 62500Hz line frequency to the driving frequency, the frequency of the tube Takayuki current technology is also difficult to manufacture them (except the monitor display tube used), it can be concluded that the is currently on the market can only monitor the nominal 100Hz 100Hz interlaced monitor.
100Hz interlaced scanning TV market in previous years has been all the rage, the representative chip solutions such as Philips MK-9 frequency processing module, Toshiba's Digital 100 module. But with the United States pixel technology and other times the Panasonic Lumix DMC-FS37 Battery Charger company's Trident (change) frequency of 60Hz (75Hz) the emergence of progressive processing module. 100Hz interlaced scanning technology has gradually been eliminated. 100Hz and 50Hz interlaced interlaced scanning technology also exists between the lines flashing, as in the crawling, creeping line, image and so rough and jagged edges. The 60Hz and 75Hz progressive scan monitor frame is due to the high technology and progressive ideal 100Hz scanning to eliminate the above defects, thus 100Hz 60Hz interlaced technology has largely been replaced by technology or 75Hz progressive.
Fourth, why the more vulnerable to monitor the magnetization? If the monitor is the magnetization should I do?
CRT monitor to the surrounding magnetic field and with magnetic material, such as metal cabinets MFL etc will generate an additional electron gun electron beam deflection, impact color purity and electron gun R, G, B tri-precision electron beam trajectory. In addition, the color picture tube inside the metal cover plate and the bracket to negative external explosion rings and other metal parts in the move will change the color monitor and the orientation of the magnetic field, magnetization of the magnetic field between these components, directly or indirectly affect the picture tube color purity and convergence, the screen will result in a partial cast. Therefore proposed as the monitor display is placed north and south (north-south perpendicular to the screen) and away from magnetic objects, as weakening the impact of the geomagnetic field. Monitor equipped with automatic degaussing circuit, the monitor can be used every time you boot normally CRT to eliminate the internal metal parts are the effects of external magnetic field. If the monitor is magnetized (expressed as poor color purity) relatively minor phenomenon, many times you can switch the magnetization of the metal parts to be demagnetized; serious even if the magnetic switch is still many times poor color purity, it had to use an external degaussing the method.
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