Monitor Performance




 

 *The THX Optimizer test signals displayed are for reference use only. Be sure to check your equipment's operations manual or refer to your service technician before making any internal adjustments on your monitor.

New THX Optimizer feature:
A Multi-burst signal has been added to the Monitor Performance test pattern for the purpose of assisting you in adjusting your television/monitor's Sharpness control. This procedure is designed to let you optimize the way the overall television/monitor's picture resolution looks.

Note: While this setting is often determined by personal preference, an optimal adjustment will ensure you presentation as intended by the film's director.

Adjust your Sharpness control until the lines (see Figure 10) in the multi-burst signal become "edgy", then reduce the setting until the lines are well defined, but not overly enhanced. Over adjusting can cause the picture to appear too "crisp", while under adjusting can make the picture appear to be "soft" or slightly out of focus.

The Sharpness control setting is subjective to the viewer. Applying too much sharpness will make the picture appear noisy while the proper setting will produce a sharp picture without the noise.

If you do not have THX blue filter glasses, the Color Bars portion of the Monitor Performance pattern can also be used to adjust your television/monitor's color and tint. Adjust your Color control so that the red box is red, but not bleeding. Next, adjust your Tint/Hue control until the Cyan (see Figure 10) and Magenta (see Figure 10) boxes are truly cyan and magenta in color.

Your television or video monitor's overall performance can be assessed using this useful signal. The white crosshatch pattern lets you determine the existence of convergence errors. Convergence errors are seen as color edges on the white bars (see Figure 11).  Perfect convergence is desirable but seldom achievable in consumer monitors. For a closer examination of convergence errors, use the white dots. The objective is to minimize the number of convergence errors. A 10-step grayscale is included that can expose any misalignment in the monitor's color balance adjustments (see Figure 12). Misalignments can show up as a slight color tinting of the black and white content in the 10-step grayscale.

Color balance errors can occur in the process of displaying a picture on the screen, when the video signal is converted into separate red, green and blue "components" to drive each of the picture tube's three electron guns. Incorrect settings between the separate red, green or blue circuits can cause one channel to respond differently than the others. Convergence errors and other color balance problems affect not only black and white content, but color images as well.  As this involves a fairly intensive understanding of your monitor's alignment section, you should call an experienced service technician to perform any of these adjustments on your monitor. The picture tube relies on magnetic energy to move the dots of color, and any movement or re-direction of your monitor can cause changes in alignment due to stray magnetic fields or charges that can remain on the picture tube's inner components. Just transporting the monitor from the service technician's place of business to your home can disrupt these sensitive settings, so adjustments should be performed in your home with the monitor placed in its viewing location. The monitor should also be facing the general direction that it will face when used as even the magnetic flux of the earth can effect this setting.

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显示器特性


*THX Optimizer 测试信号仅供参考。在调节你显示器之前,请先核对参考手册或求助于技术支持。

新的THX Optimizer特色:
在测试信号中加入了多脉冲信号,用来调节显示器的锐度设置。这个程序可以根据显示器/电视的分辨率作出相应的优化。

注意:虽然这个设置通常是根据个人爱好设置的,优化的设置可以保证你看的是导演希望表达的。

调节锐度设置使多脉冲信号的线变锐利,每根线都清晰,但不过分增强(参见附图10)。过度的调节使画面变硬,不足的调节使画面变软或轻微失焦。

虽然锐度调节是主观的,但太多的锐度会使图象上出现噪斑。适当的锐度设置既能保持图象锐利,又不会出现噪斑。

如果你没有THX蓝色滤镜,这个测试图案的色彩栏也可以用来调节色度和色调设置。调节色度使红色条不会溢出。然后使青色和品红(参见附图10)符合色卡上的标准颜色。

你可以用这个简单易用的信号评估电视或显示器的整体性能。黑背景上的白十字线可以检查你显示器的聚焦问题。聚焦错误在白线上会有色彩镶边(参见附图11)。一般家用显示设备都不会有完美的聚焦。可以用白点进一步检验聚焦,以调节到最佳的聚焦。一个十级的灰度用来检验和调节色彩平衡(参见附图12)。没有校准时,这些的灰度会有轻微的色调。

在视频信号转换到独立红绿蓝三基色时,可能出现问题,图象就会有色彩偏差。分离的红绿蓝输入如果不正确,也会影响其他通道。聚焦偏差会不仅影响黑白画面,更影响彩色画面。但这种调节是相当复杂的,你需要请一位专业人士来调节你的显示器。显象管依靠磁力来控制色点,显示器任何的移动和转动都会影响到显象管的磁力校正系统。地球磁场也会影响到显象管的磁力校正系统。从服务部把显示器运会家时会影响这个敏感的设置,所以要在家里,把显示器/电视放在家庭影院中的使用位置和方向上调整。

 

 

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m17译自www.thx.com
2002/01

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