Wednesday, January 26, 2011

Weak current College】 【LCD display principle and explain more about nouns (3)】.

<br> <br> 3. terminology <br> <br> Many people purchase computer products, often been descriptive information in proper names causing dizziness brain. Optional LCD monitor is the same, there are some whose contact with nouns will let everyone know .what to do. Therefore the author in the following article in the LCD-related, some of the more important technical terms for easy sorting and explained that we buy LCD monitor with a reference basis. <br> <br> 1. size marking and .Visual angle <br> <br> LCD monitor with a CRT monitor display in different ways, the biggest difference is the size of the marking method is not the same. For example, the CRT in specification Gakko 17 inches, but the actual Visual size .but absolutely not only about 17-inch, 15 inch more; but on the LCD monitor, if labeled 15.1 inch monitor, then the Visual dimension is 15.1 inch. <br> <br> Integrated top story: CRT monitor size marking, is based .on the diagonal length of the shell as the basis for marking; whereas in the LCD monitor, only to the Visual range of diagonal lines as shown. <br> <br> Sin is currently sold on the LCD monitor, the Visual angle is symmetrical .(that is, from the left or right you can see the angle of the images on the screen are the same. For example on the left to 60 degree Visual angle, the right must be the Visual angle 60 °). And up and down .the Visual angle is usually less than about Visual angle. <br> <br> From the user's position is, of course, the greater the Visual angle, the better. But we must understand the definition of Visual angle. When we say the Visual .angle is around 80 degrees, that stood at the beginning to monitor normal (that is, the monitor is in the middle of an imaginary line), perpendicular to the normal left or right 80 ° position, will still be able to clearly see the image .on the monitor. Because each person's eyesight is different, so we take contrast. In the maximum amount the Visual angle is to contrast the more the better. <br> <br> 2, brightness, contrast, <br> <br> TFTLCD .monitor acceptable brightness 150cd/m2 or more. The current domestic market can see TFT LCD display brightness is about 200cd/m2 (LCD monitor brightness measurement units are meters square candle "cd/m2", that is generally known as NIT). Brightness too .low will feel screen Dim light point, of course. However, if the screen is too bright, human eyes to watch the screen too long will have yaotui. Therefore, for the vast majority of users, the brightness too high is not practical. < .br> <br> Brightness and contrast for LCD monitor image rendering, compared to CRT monitors have a greater impact. High brightness of the LCD display to the user, and feel better. But also to provide enough contrast to display brightness, to ensure that .the colour fidelity and color accuracy. <br> <br> <br> TFTLCD monitor brightness range from 150Nits to 200Nits. Usually, good quality standard brightness of the LCD monitor at least 200Nits, and most of the CRT monitor maximum brightness of around only .150Nits. In case of brightness 200Nits, LCD monitor is a CRT monitor's image better. When consumers buy a monitor that you want to pay special attention to the brightness of the indicators, because there is no one definitive standard for measuring the adequacy of the bright .brightness. <br> <br> Also worth noting is that the LCD monitor in the central part of the screen is very bright, but close to the edge brightness decreases nearly 25%. The best and most effective method, that is, the LCD .monitor side-by-side comparison of one-to-one. <br> <br> Contrast index refers to the brightest white and the darkest black brightness levels between different measurements. When reaching 120: 1 contrast ratio, you can easily display vivid ., rich color. And contrast as high as 300: 1, you can support various levels of color. <br> <br> From there, users in the purchase of LCD monitors, also does not have an effective and fair criteria to measure the .contrast and brightness of the indicators. So the best recognition method or use your own eyes to judge. Upcoming LCD monitor to the lightest and darkest, and see how I feel. Now we can only use this method to find a more appropriate LCD monitor. .<br> <br> 3. response time <br> <br> The so-called "response time", is the LCD monitor for the input signal reaction speed, turn off the LCD by dark or light dimmer response time. <br .> <br> Basically, "response time" indicators as small as possible. Response time is small, the user was watching mobile screen does not appear similar to blur or towing. Typically, a variety of LCD monitor reaction speed will be divided into two .parts - the "Rising" and "Falling", which represents the sum of the two. <br> <br> 4, display color <br> <br> Early color LCD monitor in color performance, can only display up to high .color (256K). Many manufacturers use so-called FRC (FrameRateControl) technology, to simulation approach to demonstrate a full color picture. Recently, due to advances in technology, the LCD monitor can display at least to the high color 16-bit color .. Resolution, to 15.1 TFTLCD monitor as an example, the Basic can support to 1024 x 768 resolution; 17-inch LCD monitor can be above the reach 1280 x 1024 resolution, color performance in full color (32 bit) mode is easy. < .br> <br> 5, the screen refresh rate <br> <br> For a CRT monitor, the refresh rate to the screen refresh rate. Refresh faster, less prone to blinking screen. But if the refresh rate in more than user 75Hz .is not easy to find the screen flicker. <br> <br> For LCD monitors, the refresh rate and does not cause the screen to flicker. Refresh rate in 60Hz, LCD they can get a good picture. In the LCD monitor, each .pixel will continue to glow, until no light signal was sent to the controller, so LCD monitor does not have the result of continuous charging and discharging of flashing phenomenon. <br> <br> <br> Some people may ask: If most of .the LCD monitor in 60Hz refresh rate under can achieve the best visual quality, why not lock the refresh rate, and to have 60Hz 60-75Hz selection? this is related to the use of flexibility and compatibility issues. Due to the LCD monitor is attempting .to replace CRT monitor market position, but nowadays most of the display card is still a CRT monitor for design objects, the greater use of flexibility and compatibility will help to cut into the market, LCD monitor and replace CRT monitor. <br> <br .> 6. resolution <br> <br> Whether it be buying LCD or CRT monitors in General, the resolution is a measure of the monitor. Because the monitor must support hardware needed resolution. <br> <br> Traditional CRT monitor supports the .resolution of the more flexible. Whether it's higher resolution or low resolution, all to be able to display, and no loss of quality. This is because the CRT display of images by pixels (Pixels) is composed of dots and lines and, therefore, .the amount of pixels is resolution. <br> <br> However, LCD monitor, but it only supports the so-called "true interpretation", can be compared to ordinary CRT monitor to the highest resolution. The main difference is that the LCD .flat panel monitor only "true resolution" to the best performing video effects. Resolution is lower than the real resolution, the images can be rendered, but the displayed image is not as real as optimized resolution. LCD flat panel monitor real resolution is defined as ."fixed-point format", so we use the LCD monitor, keep in mind the resolution set to maximum, this picture of the rendered image will be clearer, it will feel better. <br>.

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