First, the parameters <br> <br> viewing area at the time of purchase the LCD monitor, the first consideration is the "face" size. For LCD monitors, the size of the panel is the size of the visible area, which is somewhat different from the CRT monitor. LCD monitors with the same specifications also have larger LCDs than CRTs. A typical 15-inch LCD is equivalent to a 17-inch CRT, a 17-inch LCD is equivalent to a 19-inch CRT, and a 19-inch LCD is equivalent to a 21-inch CRT. Current LCD monitors have 3.5-inch, 5.6-inch, 7-inch, 8-inch, and other vehicle-mounted monitoring displays. The 10.4, 12-inch, 15-inch, 17-inch and 19-inch are 4:3 display ratios. 22-inch, 26-inch, and 32-inch. 37-inch, 40-inch, 42-inch, 47-inch, 52-inch, 55-inch, 65-inch, 70-inch, and 82-inch are 16:9 display ratios.
Response time At present, the biggest selling point of the LCD monitor is the increasing response time, from the first 25ms to the current grayscale 4ms, the speed increase is amazing. The response time determines the number of picture frames that the monitor can display per second. Usually when the picture display speed exceeds 25 frames per second, the human eye will regard the fast-converted picture as a continuous picture. When the high-speed ball is operated and the screen is switched/moved at high speed, to achieve the best display effect, the screen display speed is more than 60 frames per second, and the response time is more than 16ms to meet the requirement, that is, the smaller the response time, the faster The more perfect the effect displayed by the changing picture.
The response time of mainstream LCD monitors on the market is 8ms, and the price/performance ratio is also quite high. The display speed is as high as 125 frames per second, which is comparable to that of CRT monitors. For those who do not have too much demand to say, 12ms, 16ms products are also a good choice, the conventional fixed-point camera, low-speed ball camera image display can also be fully satisfied.
At present, the LCD monitor products are updated very quickly, and the response time is far more advanced and faster, so that the corresponding time has reached 6ms, and the cost performance is extremely high. In the 2010 Bosch seminar conference, the smart high-speed ball demo was selected and the Tyalux HD LCD monitor was used as the terminal display. Technicians demonstrated to the provincial leaders and invited guests the demonstration of the intelligent speed dome ball rotating 360° automatic tracking demonstration project. During the meeting, the leaders and guests visited and exercised the products. The display screen of the TYALUX LCD monitor was clear and responded quickly. No trailing phenomenon was shown, and it was able to accurately track high-speed moving objects.
Brightness/Contrast, Gamut 1, Brightness The brightness of the LCD monitor refers to the brightness of the display screen, which is the maximum brightness that the LCD monitor can achieve under the white screen. The unit is Candela per square meter (cd/m2). ) Or nits. The brightness of the LCD monitor is mainly determined by the brightness of the backlight. The brightness of the backlight is controlled, that is, the brightness of the LCD monitor is controlled.
2. The ratio of the brightest and darkest brightness of the same point on the contrast LCD is the contrast of the LCD monitor. High contrast means a relatively high brightness and a bright color. The LCD monitor has a contrast ratio of 500:1, 1000:1 or higher.
3. Color gamut Color gamut is a method of encoding a color, and also the sum of the colors that a technical system can produce. The color gamut of ordinary LCDs is about 72%. The LCD screens used by Longview are able to display richer colors. The wide color gamut LCD screens have a color gamut of 92%. Therefore, the color of the display is more abundant and the color depth of the LCD monitor is improved.
Viewing angle Because the light of the LCD monitor is emitted through the liquid crystal at a nearly vertical angle, we can observe the screen from other angles, and it will not be as clear as the CRT monitor. You will see obvious color distortion. This is caused by the size of the viewing angle. Specifically, the viewing angle is divided into a horizontal viewing angle and a vertical viewing angle. When selecting the LCD monitor, products with a large viewing angle should be selected as much as possible. The viewing angle of the LCD monitor is also referred to as the viewing angle range, and includes two indicators of the horizontal viewing angle and the vertical viewing angle. The horizontal viewing angle display means that the vertical axis of the display screen prevails and is perpendicular to the axis. Or the right angle can still see the normal display image, this angle range is the horizontal viewing angle of the LCD monitor; Similarly if the horizontal axis, the upper and lower viewing angle is called the vertical viewing angle . Longview LCD monitor uses a wide viewing angle LCD screen, up to 89 angles from the left and right viewing angle and up and down viewing angle.
In addition to the response time, viewing angle, and color reproduction capabilities of the panel, the number of dead pixels and highlights is another important criterion for judging the merits of the monitor. Bad points are divided into bright spots, dark spots, and color spots, which refer to unrepairable physical pixels on the LCD panel. The LCD screen is divided into several levels according to the difference of parameters such as dead pixels, color purity, and viewing angle: AA level: LCD screen without any dead pixels is AA grade; A level: 3 bad pixels or less, among which the highlights are not more than one. The highlights are not in the central area of ​​the screen; Level B: 3 points below the bad point, of which no more than two bright spots, and the highlights are not in the central area of ​​the screen; C level: more than 3 dead pixels.
Second, the classification <br> <br> sized LCD monitors are divided into sub 3.5 / 5.6 / 8 / 10.4 / 12/15/17/19/22/26/32/37/40/42/47/52/55 /65/70/82 inch monitor and so on.
In accordance with the use of sub security LCD monitors, monitor LCD monitors, broadcast LCD monitors, industrial LCD monitors, LCD monitors and so on.
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