Color monitors using cathode ray ray tubes (CRTs) and color monitors using liquid crystal displays (LCDs) are distinguished by the principle of image reproduction. The former uses magnetic deflection drives to implement line-field scanning (also called analog driving). Mode), while the latter uses a dot-matrix drive (also called a digital drive). Therefore, the former often uses television lines to define its sharpness, while the latter defines its resolution by the number of pixels. The clarity of a CRT monitor is mainly determined by the channel bandwidth of the monitor and the dot pitch and convergence error of the picture tube, while the latter is determined by the number of pixels of the LCD screen used. The CRT monitor has the advantages of low cost, high brightness, wide viewing angle and high service life, while the LCD monitor has the advantages of small size (flat plate shape), light weight, no flashing, and no radiation of the image, but the LCD monitor The main disadvantages are high manufacturing cost, narrow viewing angle (darkened image when viewed from the side, reversed color when viewed from the side), and short service life (usually the LCD screen brightness drops below 60% of normal brightness after 5000 hours of burning, but CRT's average life expectancy can reach more than 30,000 hours) and other shortcomings. It should be affirmed that price, perspective, and service life are the three bottlenecks that affect the popularity of LCD monitors. Of course, LCD is one of the most mature leading-edge products of flat panel display devices and has been increasingly concerned by manufacturers at home and abroad, and its technology is continuously improving. At present, the horizontal viewing angle of a new thin film product (TFT) process using in-plane switching technology can reach 160° and the vertical viewing angle can reach 140°; at the same time, the price of LCD screens will gradually increase with the product. And the gradual increase in production and gradually decline; LCD's life will also be with LCD backlight and liquid crystal material technology continues to improve. Therefore, there is no doubt that after several years (perhaps 5 or 10 years later), LCD monitors are likely to replace CRT monitors as the mainstream of the monitor market.
Self Drilling Screw
Self drilling Screw made of 410 stainless steel, high hardness (40 Rockwell C), steel process.
Drilling screw is also very strong hardness, compared to the ordinary screw up, not only to maintain the ability is good, the connection object effect is also very strong, for the performance of the screw, are generally does not need auxiliary processing, can be directly on the object directly drill a Kong Sue into objects, not just use rise very convenient, Also can greatly improve the efficiency of work. This kind of drilling screw can be said to be the first choice of workers in various fields.
So what is the use of drilling screws?
1 stainless steel plate, metal plate, galvanized steel plate, engineering installation.
2 metal curtain wall metal light compartment and other indoor and outdoor installation.
General Angle steel, channel steel, iron plate and other metal materials combined installation.
4, automobile, container, shipbuilding, refrigeration equipment and other assembly projects.
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