1. Parameters
Visible area
When buying an LCD monitor, the first consideration is the size of the "face". For LCD monitors, the size of the panel is the size of the visible area, which is somewhat different from the CRT monitor. For monitors with the same specifications, the LCD has a larger viewing area than the CRT. Generally, a 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 car monitoring displays, 10.4 inches, 12 inches, 15 inches, 17 inches, 19 inches are 4: 3 display ratio, 22 inches, 26 inches, 32 inches , 37 inch, 40 inch, 42 inch, 47 inch, 52 inch, 55 inch, 65 inch, 70 inch, 82 inch, etc. are 16: 9 display ratio.
Response time
At present, the biggest selling point of LCD monitors is the ever-increasing response time. From the initial 25ms to the grayscale of 4ms today, the speed of the improvement is amazing. The response time determines the number of frames that the monitor can display per second. Generally, when the screen display speed exceeds 25 frames per second, the human eye will regard the rapidly changing screen as a continuous screen. 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 more than 16ms to meet the requirements. The more perfect the effect shown in the changing picture.
At present, the response time of mainstream LCD monitors on the market is 8ms, and the cost performance is also quite high. The display speed of up to 125 frames per second is comparable to that of CRT monitors. For consumers who do not have excessive requirements, 12ms and 16ms products are also good choices. Conventional fixed-point cameras and low-speed dome camera image display can also be fully satisfied.
At present, 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 intelligent high-speed ball demonstration was selected, and the TYALUX high-definition LCD monitor was used as its terminal display. The technicians demonstrated to the leaders and guests of the Provincial Public Security Department, respectively, the demonstration project of the intelligent high-speed ball rotating at a high speed and 360 ° automatic tracking. During the meeting, the leaders and guests visited and exercised the products. The display on the TYALUX LCD monitor was clear and responsive. It did not show any trailing phenomenon. It can perfectly 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 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 its backlight source. The brightness control of the backlight source is also the brightness control of the LCD monitor.
2. Contrast The ratio of the brightness at the brightest point to the darkest point on the same point on the LCD screen is the contrast of the LCD monitor (Contrast). High contrast means relatively high brightness and the brightness of the presented colors. The contrast requirements of the LCD monitor are: 500: 1, 1000: 1 or higher.
3. Color gamut Color 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 value of the ordinary LCD is about 72%. In order to display richer colors, the LCD screen selected by Longview uses a wide color gamut LCD screen with a color gamut of up to 92%. Therefore, the displayed colors are more abundant, and the color depth of the LCD monitor is improved.
Viewing angle
Since the light of the LCD monitor is emitted forward through the liquid crystal at a near vertical angle, when we observe the screen from other angles, it will not be as clear as the CRT monitor, but will be seen Obvious color distortion. This is caused by the viewing angle. Specifically, the viewing angle is divided into a horizontal viewing angle and a vertical viewing angle. When choosing an LCD monitor, try to choose a product with a large viewing angle. The viewing angle of the LCD monitor (view angle) is also called the viewing angle range, including two indicators: horizontal viewing angle and vertical viewing angle. The horizontal viewing angle display indicates that the vertical axis of the display screen is prevailing, and the vertical axis is perpendicular to the axis. The display image can still be seen normally at a certain angle on the left or right. This angle range is the horizontal viewing angle of the LCD monitor. Similarly, if the horizontal axis prevails, the vertical viewing angle is called vertical viewing. angle. Longview LCD monitor uses a wide viewing angle LCD screen, the left and right viewing angle and the top and bottom viewing angle can be up to 89 angles.
panel
In addition to response time, viewing angle, and color reproduction capabilities, the number of dead pixels and bright pixels is another important criterion for judging the quality of a monitor. The dead spots are divided into bright spots, dark spots, and color spots, all referring to the irreparable physical pixels on the LCD panel. The LCD screen is divided into several levels according to the differences in parameters such as dead spots, color purity, viewing angle, etc .: AA grade: LCD screen without any dead spots is AA grade; A grade: below 3 dead spots, of which no more than one bright spot And the bright spots are not in the central area of ​​the screen; level B: less than 3 dead spots, of which no more than two bright spots, and the bright spots are not in the central area of ​​the screen; level C: more than three dead spots. .
Second, classification
By size
LCD monitors are 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
Color, black and white monitors. According to the scanning method: flat screen, progressive scan, etc.
According to usage
Security monitor, surveillance monitor, radio and television monitor, industrial monitor, computer monitor, etc.
Outdoor sunshade umbrella is a common outdoor product used to block sunlight and rain, providing people with a comfortable outdoor resting environment. According to different functions and materials, outdoor sunshades can be divided into various types, which will be classified and introduced below.
Umbrella: Mainly used to block sunlight, prevent ultraviolet radiation, and protect people's skin from harm. Umbrellas are generally made of materials with anti ultraviolet coatings, which can effectively block the penetration of ultraviolet rays.
1. Classified by material
1. Polyester umbrella cloth: Polyester is a synthetic fiber material with good waterproof performance and durability. Polyester umbrella fabric is often used for umbrella protection and is suitable for various outdoor environments.
2. Nylon umbrella cloth: Nylon is a synthetic fiber material that is lightweight, wear-resistant, and waterproof. Nylon umbrella cloth is often used for rain and wind umbrellas, and is suitable for outdoor sports and travel.
3. UV resistant coating: Some outdoor sunshades use special UV resistant coatings, which can effectively block the penetration of ultraviolet rays and protect people's skin from harm.
2. Sort by size
1. Small umbrella: The diameter of the umbrella surface is generally below 60 centimeters, suitable for single person use or small spaces.
2. Medium Umbrella: The diameter of the umbrella surface is between 60 centimeters and 80 centimeters, suitable for 2-3 people to use.
3. Large Umbrella: Umbrella with a diameter of over 80 centimeters, suitable for use by multiple people or in larger spaces.
Sunshade,Beach Umbrella,Garden Sunshade,Sandy Shade
Foshan Shengshi Zhihui Technology Co., Ltd. , https://www.zhhotelfurniture.com