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Response time <br> At present, the biggest selling point of LCD monitors is the increasing response time. From the first 25ms to the current gray level of 4ms, the speed increase is amazing. The response time determines the number of frames that the monitor can display per second. Usually when the screen display speed exceeds 25 frames per second, the human eye regards the fast-changing picture as a continuous picture. In the high-speed ball operation, when the screen is switched/moved at high speed, to achieve the best display effect, the screen display speed needs to be more than 60 frames per second, and the response time is 16ms or more to meet the requirements. That is, the smaller the response time, the faster. The effect of the changed picture is more perfect.
At present, the response time of mainstream LCD monitors on the market is 8ms, and the cost performance is also quite high, up to 125 frames per second, which is comparable to CRT monitors. For consumers who do not have high requirements, the 12ms, 16ms products are also a good choice. The conventional fixed-point camera and low-speed dome camera image display can also be fully satisfied.
At present, LCD monitor products are updated very fast, and the response time has to be advanced and fast, so that the corresponding time has reached 6ms, and the cost performance is extremely high. In the 2010 Bosch seminar, the intelligent high-speed ball demonstration was used, and the TYALUX high-definition LCD monitor was used as its terminal display. The technicians demonstrated to the provincial public security department leaders and invited guests the smart high-speed ball speed rotation and 360° automatic tracking demonstration project. During the conference, the leaders and guests visited and drilled the products. The TYALUX LCD monitor showed clear picture and extremely fast response. It did not show any tailing images and could accurately track high-speed moving objects.
Brightness/contrast, color gamut
1. Brightness The brightness of the LCD monitor refers to the brightness of the display screen, which is the maximum brightness that can be achieved by the LCD monitor 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 its backlight, and the brightness control of the backlight, that is, the brightness control of the liquid crystal monitor.
2. Contrast The ratio of the brightness at the same point on the LCD screen to the brightness at the darkest level is the contrast of the LCD monitor. The high contrast ratio means the relatively high brightness and the brightness of the rendered color. The contrast ratio of the LCD monitor is: 500:1, 1000:1 or higher.
3. Gamut gamut is a method of encoding a color, and also refers to the sum of colors that a technical system can produce. The color gamut of ordinary LCD is about 72%. The LCD screen used by Longview uses a wide color gamut LCD screen to display more colorful colors, and its color gamut is as high as 92%. Therefore, the displayed color is more abundant, and the color depth of the liquid crystal monitor is improved.
Viewing angle <br> Since the light of the LCD monitor is emitted forward through the liquid crystal at a nearly vertical angle, we can observe the screen from other angles, and it is not as good as watching a CRT monitor. Clear, and you will see significant 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 a liquid crystal monitor, try to choose a product with a large viewing angle. The viewing angle of the LCD monitor is also called the viewing angle range, including the horizontal viewing angle and the vertical viewing angle. The horizontal viewing angle display is based on the vertical axis of the display, and is perpendicular to the axis. Or the position of the right angle can still see the display image normally. This angle range is the horizontal viewing angle of the LCD monitor. Similarly, if the horizontal axis is correct, the upper and lower viewing angles are called the vertical viewing angle. . Longview LCD monitors use a wide viewing angle LCD screen with up to 89 angles for left and right viewing angles and up and down viewing angles.
Panel <br> In addition to response time, viewing angle, and color reproduction capabilities, the number of dead pixels and highlights is another important criterion for judging the pros and cons of monitors. The bad points are divided into bright spots, dark spots and color points, all referring to physical pixels that cannot be repaired on the LCD panel. The LCD screen is divided into several grades according to the difference of parameters such as dead pixels, color purity, and viewing angle: AA grade: LCD screen without any bad points is AA grade; A grade: 3 bad points, of which no more than one bright spot. And the highlight is not in the central area of ​​the screen; B level: below 3 bad points, 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.
classification
Divided by size <br> The LCD monitor is divided into 3.5/5.6/8/10.4/12/15/17/19/22/26/32/37/40/42/47/52/55/65/70/82 Inch monitors, etc.
By color <br> Color, black and white monitor. According to the scanning method: flat, progressive scanning, etc.
According to usage, security monitors, monitor monitors, radio monitors, industrial monitors, computer monitors, etc.
LCD monitor parameters and categories
[ Huaqiang Security Network News ] Small LCD monitor parameters and categories Visible area <br> When buying an LCD monitor, the first thing to consider is the "face" size. For LCD monitors, the size of the panel is the size of the viewable area, which is somewhat different from CRT monitors. For monitors of the same specification, the LCD has a larger viewing area than the CRT. 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. At present, LCD monitors have 3.5-inch, 5.6-inch, 7-inch, 8-inch and other vehicle monitoring displays, 10.4 inch, 12 inch, 15 inch, 17 inch, 19 inch for 4:3 display ratio, 22 inch, 26 inch, 32 inch 37-inch, 40-inch, 42-inch, 47-inch, 52-inch, 55-inch, 65-inch, 70-inch, 82-inch, etc. are 16:9 display ratio.