Optimized adjustment technique of LCD display system

When you buy an LCD monitor, you should know that debugging them is completely different from the previous debugging of CRT monitors. If you do not know this matter, then hurry to follow me, step by step, the LCD to the best state it! Although these techniques are mainly for LCD, but some of them will also help the CRT, so still using CRT monitor friends, do not lose heart Oh!

Install the latest graphics driver

No matter what type of display you use, your graphics card is often a decisive factor in image quality. So you should first check to see if your graphics driver is the latest version. If not, try upgrading to the latest version of the drive! This is the most convenient and effective way to improve image quality, but also can solve some hardware and software conflicts.

Note: Try not to use Device Manager's Update driver option! It's okay to update drivers for other hardware devices, but it's easy to go wrong when you update the graphics driver. You should browse your video card manufacturer's website and click Downloads or support link to download the latest graphics driver for the corresponding model. Just don't use the beta driver provided on the manufacturer's website. They can cause strange problems to computers when they are at work.

You'd better configure your graphics card with Windows Display properties by right-clicking the desktop space, selecting Properties, and opening the Display Properties dialog box. You'll see a lot of setup options, although this can vary depending on the drive, but all of the graphics drivers offer the following key settings:

Screen resolution: On a CRT monitor, the screen resolution represents the number of pixels that appear vertically and horizontally on your screen, which can be adjusted manually. You can adjust the image quality to increase or reduce the resolution to achieve their own satisfactory results. But these measures do not work very well for LCDs because the best resolution is fixed. The best way to display a full screen is only when the display mode is set to the best resolution.

Most 15-inch LCD fixed (physical) resolution is 1024x768, while 17 and 19-inch LCDs are usually 1280x1024. As long as the resolution is lower than the fixed best resolution will result in LCD will compress the picture to the corresponding size to display or forcibly stretch the image full screen display. When you force a full-screen image, the LCD uses an interpolation algorithm to supplement the missing pixel, which inevitably damages the picture. However, secretly tell you a secret, when you use the fixed resolution of half the mode to display the image, the resulting image will not be compressed deformation, or interpolation algorithm to spend the screen. For example, use the resolution of 800x600 to replace the fixed 1600x1200 resolution.

Even if some LCDs have the ability to zoom in on a fixed resolution, and the image displayed is very smooth in this case, you'd better adjust your display resolution to a fixed resolution, which is the best state. How to: Click the settings bar in the Display Properties dialog box and drag the scroll bar below the screen resolution (see Figure 1). If Windows has correctly identified your monitor, the fixed resolution is the highest resolution you can reach by dragging the scroll bar.

Figure 1

Color number: As we all know, the higher the number of colors your monitor displays, the more realistic your image will be. Most PCs support the highest number of color digits typically 32 digits. However, if you find that the image display speed is slowing down (especially if your PC is using RAM as memory, like many low-end integrated display unit PCs), reducing the number of colors will often speed up the machine. You can balance them according to your own situation!

Refresh rate: Many CRT appear screen flicker, this is because the screen refresh rate is set too low (CRT display is the principle of the display through the electronic gun on the screen phosphor repeatedly draw many images, to ensure that the image display, this is called refresh rate). In general, a CRT needs to be refreshed 72 times per second (called 72Hz) to prevent eye fatigue. You don't have to. Set the display resolution to the highest, and you can debug repeatedly to find the best visual resolution, even if it is below the maximum resolution.

For LCD, screen flicker is not a reason to affect visuals, because its display principle does not refresh the entire screen like a CRT, just changing the state of each LCD point. For LCD, in addition to some very professional LCD, generally set the refresh rate of 40 to 60Hz is enough.

Response time: For some LCD users, especially gamers, may be particularly concerned about response time issues. The display's pixel response time, which is the time when a single pixel color changes from black to white and back to black. The old LCD's pixel response time is slower than 20ms, which can cause ghosting and trailing when there are fast moving images on the screen. Most of the LCD response times today are faster than 20ms. But if you're going to buy an LCD for a game, it's best to pay more attention to this parameter. For details, please refer to our Special report on LCD response time.

Monitor settings

Whether your monitor is LCD or CRT, do not be afraid to debug the control settings. You debug to make your eyes the most comfortable setting is the best setting, not the vendor recommendation, or friend suggested setting parameters. Usually you can set it by placing a button or knob underneath the monitor.

LCD is always easier to debug than a CRT. You hardly need to adjust the visuals on the LCD screen up, down, left, or right to make sure that the screen shows the full image without the black box. These are the things that often need to be done when debugging a CRT. Many LCD has a button or SET options to automatically adjust and position the image on the screen to full screen display, which is your quickest way to adjust. Of course, if your LCD monitor is set to a fixed resolution, in most cases, you will have little use for color and contrast debugging.

The following is the most common LCD on the market settings and debugging methods. Note: Setting the option name for debugging will vary according to the brand and model.
Brightness and contrast: Brightness settings control the brightness of the display backlight lamp. LCD brightness is always higher than the CRT, so almost no need to improve brightness. If necessary, you can adjust the contrast by using a grayscale table (some of the displays are randomly supplied), which maximizes the number of visible gray steps. However, the LCD is usually distorted when displaying the darkest color of the gradient.

Hue or color temperature: Different light sources emit different colors of white light, from cold green to white to warm red and white. Most displays provide at least three shades or color temperature to adjust colors to normal display under different light conditions. These three types of color temperature may be labeled Mode 1, Mode 2, mode 3 or High, Medium, and low. Manufacturers are also likely to use professional Kelvin (used to detect the color of the hot objects emitting white light) to identify color temperature. The usual settings include a blue-and-cold 9300K, a more neutral 6500K, and a partial red-warm 5000K. Many monitors allow you to manually select the balance between the red, blue, and green primaries in white light. Adjust the settings to see which color temperature is best for you.

Horizontal and vertical positioning: This setting allows you to manually position the image in the center of the screen in full screen display. However, now most of the LCD with automatic tuning button and other automatic positioning adjustment menu, you do not have to bother to manually adjust.

Pixel clock and Phase clock: These two settings are often shown under a bunch of names (including coarse/fine), but they usually appear as visual buttons such as images or graphics. If you have a problem with your analog VGA connection, it is also a good idea to manually adjust these settings instead of relying on automatic conversion to correct the so-called free pixels.

Info: Some LCDs have this option to tell you the current screen resolution and the working time of the monitor and the time it will take to light the backlight, which can tell you exactly whether you purchased a second-hand LCD.

Other Tips

Windows XP's font-clear display technology will make the text displayed in the LCD smooth, much clearer. How to: Click the Appearance page of the Display Properties dialog box, select the effect, select "Use the following method to smooth screen font", from the Drop-down menu select "Clear" (see Figure 2).


Figure 2 Using clear display technology, your LCD will be more beautiful characters

DirectX is also a technology that Windows improves the performance of video cards and sound cards. Use the DirectX Diagnostics tool to determine if you have the latest version of DirectX (currently 9.0c). Specific method: Click Start-Run, enter DxDiag, press ENTER. Locate the version information under the system page that pops up (see Figure 3). If it's not a 9.0c version, you can download the latest DirectX version from Microsoft.


Figure 3

Make sure you've used the latest version of the 9.0c directx!

Connect your LCD to your computer as much as possible through the DVI interface. This digital interface transmits a much higher quality than a CRT analog VGA interface. If your LCD has a DVI interface, but your video card only VGA port, in order to quality and eye health best or upgrade the video card! The video card with the DVI port is now very cheap, and the 400~500 dollar can be won. If you set the display to the highest brightness, but the screen image still feels dark, try adjusting the gamma (screen brightness) value of the Windows Display properties. Users with ATI or NVIDIA video cards can be configured in the corresponding manufacturer icon in the Display properties settings-Advanced.

Daily maintenance of LCD

LCDs are easier to maintain than CRT, but occasionally they can be problematic. The following are some of the more common problems and solutions for LCD.

Black screen: If the LCD power display lights, but no image, you can check the connection between the monitor and PC to see if they received the video signal. If there is no loose ends of the cable, then give the PC a monitor to see. This eliminates the possibility of problems with connectors and video cards. If the second monitor can display images, the backlight in your LCD may have an aging problem, which is the most common cause of this type of failure. You can change your backlight lamp at the dealership. If you are a professional, you can also change their own, but to find the corresponding backlight lamp and a precise replacement or need some technical. Remind: Before you start to change, you'd better check the price, compare the replacement price with the purchase of a new monitor price difference size, then do it!

Bad point: Most LCD manufacturers admit that their products have a bad spot, which is caused by the production process of LCD, but only after more than three bad points they will be replaced. When you first connect the LCD to the monitor, it is necessary to check the LCD's bad points with the black screen and the screen first. If there are more than three bad points, please ask the Distributor to replace them immediately.

Whether it is a liquid crystal display, or LCD TV, the use of LCD screen of all digital equipment, such as color mobile phones, PDAs, PSP and other handheld game consoles, DC, DV, LCD bad points will occur. When you buy a device that has an LCD screen, you don't have to use the body's default wallpaper pattern, and don't use black or gorgeous wallpaper, so you can't see the bad points. To identify if there are any bad spots on the screen, you can change the wallpaper to find. Replace the wallpaper or desktop background with black, white, pure red, pure green, blue five colors to carefully observe the LCD screen has the same color point or luminous highlights. In such a test environment, the bad spots are almost nowhere to hide.