这是锐利的超高清电视(Ultra High Definition televisions)的时代，为什么您的电视画面如此模糊或模糊？
您可能需要为您的眼镜开一个新的处方。但是，如果您的眼睛没有问题，则必须进行故障排除才能获得最佳照片。
1. 去除干扰源
一些LCD模糊或重影问题是由电气干扰或电涌保护器故障引起的。要消除此原因，请尝试将电视直接插入插座，而无需任何电源板或电涌抑制器。如果这样可以解决问题，您可以尝试使用不同的电源板。
您还应该尝试关闭与电视相同的电路上的设备。任何带有交流电机的设备，例如冰箱、空调或风扇，都可能导致电气干扰。这些设备不太可能与电视插座位于同一电路上，但值得检查。
如果您的电源直接来自电源波动，则可以过滤掉这些尖峰的UPS可能是解决方案，但您需要一名电工来检查您的电源。
2. 你的信号源分辨率低吗？
平板液晶(LCD)电视（或显示器）上的图像模糊的最常见原因之一是内容的分辨率与屏幕的原始分辨率能力不匹配。
LCD、Mini-LED、microLED、等离子(Plasma)、OLED或QD-OLED都使用不同类型的技术来制作动画。然而，他们都有一个共同点，那就是“原生”解决方案。这是指电视的物理像素（图片元素）网格。4K超高清(UHD)电视的像素网格为 3840 x 2160 像素。这是1920×1080全高清(Full HD)电视的四倍像素。因此，对于全高清(Full HD)图像源中的每个像素信息，电视必须填充四个物理像素的数据。
将低分辨率图像“升级”为高分辨率显示器的方法有很多种，它们都取得了不同程度的成功。从FHD到UHD很简单，因为它涉及使四个像素组充当单个像素。每当源图像的分辨率均分到目标屏幕的分辨率时，您将获得更柔和的图像，但它仍然看起来不错。
如果源没有完美地划分为目标，您可能会得到丑陋的污迹结果。下面列出的许多修复可以帮助修复模糊或模糊的放大结果。
3.更改您的升级设置(Settings)（或您的升级器）
各种电视(TVs)和机顶盒设备就如何将低分辨率源缩放到高分辨率屏幕提供了不同的选择。我们在这里不能很具体，因为不同的设备和电视(TVs)有不同的名称和菜单系统。因此，您最好在手册或网上查找与“升级”和您的设备有关的任何内容。
我们可以给您的一个重要提示是避免让电视本身进行升级。高端电视可能具有卓越的升级技术，但中档和低端电视机通常没有处理能力来升级并获得良好的效果。
相反，如果您使用的是有线电视盒、游戏机、Android TV、Apple TV或其他类似来源等连接设备，请将其输出分辨率设置为与电视的原始分辨率相匹配。任何升级都将在该设备到达电视之前发生。
4.更改您的流媒体图片质量设置(Picture Quality Settings)
如果您正在观看流媒体视频源（例如智能电视上的Netflix或Hulu应用程序），那么模糊图像可能与您的电视无关，而与您的带宽或质量设置有关。
转到您选择的流媒体应用程序的图片设置，并设置您的质量和带宽使用偏好。使用某些流媒体应用程序（例如Disney Plus），您可以在观看内容时选择首选质量。将质量设置从自动更改为与电视设计显示的设置相匹配的设置。
请记住(Bear)，您的互联网连接可能太慢而无法以电视的最清晰质量进行流式传输。流也可能需要几秒钟才能切换到更高质量的模式。每个分辨率层中也有不同的质量“比特率”。因此，尽管您可能以（例如）4K 进行流式传输，但如果它处于该分辨率的比特率较低端，则图片中仍然可能存在模糊、模糊或其他伪影。
5. 信号源是数字的还是模拟的？
HDMI是一种数字图像标准，可确保您获得源的质量而不会降级。如果您使用的是模拟源，例如使用RCA连接器连接的(RCA)DVD播放器，则可能会因多种因素而产生大量干扰或信号丢失。
如果可能，请改用HDMI。回到我们的DVD播放器示例，一些型号提供HDMI输出并具有内部升频器，旨在使DVD素材在现代高清电视(HDTVs)上看起来更清晰。
6. 尝试不同的 HDMI 电缆(Different HDMI Cable)或端口(Port)
HDMI是数字的，通常它可以正常工作或根本不工作。但是，我们已经看到了不良端口或电缆可能导致雪花或其他图像伪影的情况。HDMI具有一定程度的数字纠错功能。但是，如果电缆或端口的电气干扰或损坏量超过阈值，则可能会降低图像质量。
解决视频模糊或模糊的一种方法是关闭HDMI电缆或将其移至电视上的另一个输入端，以检查电缆或端口是否有问题。
7.更改锐度设置
几乎所有现代高清电视(HDTVs)都提供了一种数字锐化形式。这通常与对比度、亮度等一起列在电视设置下。使用电视遥控器访问这些菜单，通常是先按菜单按钮。
降低锐度级别将使图像柔化。可能是您的锐度设置使事物变得如此柔和，以至于显示看起来模糊或模糊。答案当然是调高锐度，直到您对结果满意为止。
增加锐度滤镜也是处理源素材模糊的有效方法。尽管如此，在图像看起来过度锐化和不吸引人之前，只能做很多事情。
8.打开模糊减少功能
与 CRT（阴极射线管(cathode ray tube)）电视(TVs)不同，所有现代平板电视(TVs)都表现出一种称为采样保持运动模糊的运动模糊。此外，由于单个像素的状态变化太慢，低端电视可能具有固有的模糊性。(TVs)
三星(Samsung)和索尼(Sony)等公司一直在不懈地努力开发新的面板技术来解决这些问题。如果您有一台旧电视，它可能无法从较新型号可以实现的快速像素响应时间中受益。
至于由平板技术的采样保持特性引起的运动模糊，您可以激活两个主要功能来对抗它。首先是运动平滑，也称为帧插值。不同的电视(Different TV)品牌有其他名称，因此您必须查找与运动、平滑度相关的内容，或者使用“运动平滑”一词在网络上搜索您的电视型号。
此功能从视频中的现有帧创建新帧，以提供流畅的无模糊运动。这是广受诟病的“肥皂剧效果”，但对于某些内容，您可能更喜欢这种模式的清晰度，例如高清体育广播。
第二个功能称为黑框插入(Black Frame Insertion)( BFI )。这会在屏幕上显示的每一帧之间插入一个黑框。这使得电视提供的运动更接近脉冲CRT显示器，从而消除了采样保持模糊。然而，这是以亮度和活力为代价的。较新的电视(Newer TVs)不会像旧型号那样受苦，但无论哪种方式，您都可以打开该功能并决定您喜欢哪种图像。
9.关闭图像后处理
后处理功能是电视在显示图像之前对图像所做的所有事情。电视制造商拥有有助于使图像看起来更好的算法“秘诀”，但过多的后期处理会留下柔和模糊的图像。
尽可能多地关闭后期处理效果，使用您的电视手册作为指导，然后尝试那些提供最佳画面而又不会造成太多模糊的效果。如果您遇到下雪或有斑点的图像，降噪可能是最重要的调整设置之一。(Noise)
10. 获得专业评估
如果您在上面尝试过的任何方法似乎都无法解决您模糊不清的电视问题，那么可能是时候让专业的技术支持人员查看您的电视了。在某些情况下，它可能就像更换相对便宜的组件一样简单。但如果电视的核心部件出现问题，更换这些主要部件往往不值得。如果您的电视仍在保修期内，您应该避免让任何人对其进行操作，即使这是一个小问题。相反，请在保修期内对其进行维修和更换。
Is Your TV Screen Blurry or Fuzzy? Try These 10 Fixes
This is the age of tack-sharp Ultra High Definition televisions, so why is your TV’s picture so blurry or fuzzy?
You might need a new prescription for your glasses. But if there’s nothing wrong with your eyes, you’ll have to troubleshoot to get the best picture.
1. Remove Sources of Interference
Some LCD blur or ghosting issues result from electrical interference or faulty surge protectors. To eliminate this as a cause, try plugging your TV directly into the outlet without any power strips or surge suppressors in the chain. If that solves the problem, you can try using a different power strip.
You should also try switching off devices on the same circuit as the TV. Any device with an AC motor, such as a fridge, air conditioner, or fan can cause electrical interference. It’s unlikely that these devices would be on the same circuit as the outlet for your TV, but it’s worth checking.
If you have fluctuating power coming directly from your mains, a UPS that filters out these spikes may be the solution, but you’ll need an electrician to check your supply.
2. Is Your Source Low Resolution?
One of the most common causes of a blurry picture on a flat-screen LCD TV (or monitor) is a mismatch between the content’s resolution and the native resolution capability of the screen.
LCD, Mini-LED, microLED, Plasma, OLED, or QD-OLED all use different types of technology to make moving pictures. However, one thing they all have in common is a “native” resolution. This refers to the TV’s grid of physical pixels (picture elements). A 4K UHD TV has a pixel grid of 3840 x 2160 pixels. This is four times as many pixels as a Full HD TV at 1920×1080. So, for every pixel of information in a Full HD image source, the TV must fill four physical pixels’ worth of data.
There are various methods of “upscaling” lower-resolution images to high-resolution displays, and they all have varying levels of success. Going from FHD to UHD is straightforward since it involves making groups of four pixels act as a single pixel. Whenever the resolution of the source image divides evenly into the target screen’s resolution, you’ll get a softer image, but it will still look good.
If the source doesn’t divide perfectly into the target, you may get an ugly smeary result. Many of the fixes listed below can help to fix blurry or fuzzy upscaling results.
3. Change Your Upscaling Settings (Or Your Upscaler)
Various TVs and set-top box devices offer different options regarding how they should scale lower-resolution sources to a higher-resolution screen. We can’t be very specific here because different devices and TVs have other names and menu systems. So you’re better off looking in your manual or online for anything to do with “upscaling” and your devices.
One important tip we can give you is to avoid having the TV itself do the upscaling. High-end televisions may have superior upscaling technology, but mid-range and low-end sets generally don’t have the processing power to upscale with good results.
Instead, if you’re using a connected device like a cable box, gaming console, Android TV, Apple TV, or another similar source, set its output resolution to match your TV’s native resolution. Any upscaling will happen on that device before it reaches the TV.
4. Change Your Streaming Picture Quality Settings
If you are watching a streaming video source (such as the Netflix or Hulu app on a smart TV), then the fuzzy image may have nothing to do with your TV and everything to do with your bandwidth or quality settings.
Go to the picture settings of your streaming app of choice and set your quality and bandwidth usage preference. With some streaming apps (e.g., Disney Plus), you can select the preferred quality while watching your content. Change the quality setting from automatic to a setting that matches what your TV was designed to display.
Bear in mind that your internet connection may simply be too slow to stream at your TV’s sharpest quality. It may also take a few seconds for the stream to switch to the higher-quality mode. There are also different quality “bitrates” within each resolution tier. So although you may be streaming at (for example) 4K, if it’s at the lower end of the bitrate for that resolution, there can still be blurring, fuzziness, or other artifacts in the picture.
5. Is the Source Digital or Analog?
HDMI is a digital image standard, ensuring you get the source’s quality without degradation. If you’re using an analog source, such as a DVD player connected using RCA connectors, there can be a significant amount of interference or signal loss based on several factors.
If at all possible, switch to HDMI instead. Returning to our DVD player example, some models provide HDMI output and have internal upscalers designed to make DVD footage look sharper on modern HDTVs.
6. Try a Different HDMI Cable or Port
HDMI is digital, and usually, it works correctly or not at all. We have seen situations, though, where bad ports or cables can cause snow or other image artifacts. HDMI is built to have a certain level of digital error correction. However, if the amount of electrical interference or damage to a cable or port passes a threshold, it may degrade the image.
One fix for a blurry or fuzzy video is to switch out the HDMI cable or move it to another input on the TV to check if there might be something wrong with the cable or the port.
7. Change The Sharpness Settings
Virtually all modern HDTVs offer a form of digital sharpening. This is usually listed under TV settings alongside contrast, brightness, etc. Use your TV remote control to access those menus, usually by first pressing the menu button.
Lowering the sharpness level will soften the image. It might be that your sharpness setting has softened things so much that the display looks blurry or fuzzy. The answer, of course, is to turn the sharpness up until you’re happy with the result.
Increasing the sharpness filter is also an effective way to deal with blurriness in the source footage. Still, there’s only so much that can be done before the image looks over-sharpened and unappealing.
8. Turn On Blur-Reduction Features
Unlike CRT (cathode ray tube) TVs, all modern flat-screen TVs exhibit a type of motion blur known as sample-and-hold motion blur. In addition, lower-end TVs may have inherent blur as the individual pixels change their state too slowly.
Companies like Samsung and Sony have worked tirelessly to create new panel technologies to combat these issues. If you have an old TV, it may not benefit from the fast pixel response times more recent models can achieve.
As for motion blur caused by the sample-and-hold nature of flat panel technology, there are two main features you can activate to combat it. The first is motion smoothing, also known as frame interpolation. Different TV brands have other names, so you’ll have to look for something that refers to motion, smoothness, or do a web search for your TV model with the term “motion smoothing.”
This feature creates new frames from the existing frames in the video to offer liquid-smooth blur-free motion. This is the much-derided “soap opera effect,” but you may prefer the crispness of this mode for some content, such as HD sports broadcasts.
The second feature is something known as Black Frame Insertion (BFI). This inserts a black frame between every frame displayed on the screen. This makes the TV offer motion closer to a pulsed CRT display, thus defeating sample-and-hold blur. However, this comes at the cost of brightness and vibrancy. Newer TVs don’t suffer as much as older models, but either way, you can switch the feature on and decide which image you prefer.
9. Turn Off Image Post-processing
Post-processing features are all of the things that the TV does to the image before displaying it. TV manufacturers have a “secret sauce” of algorithms that help make images look better, but too much post-processing can leave a soft and blurry image.
Turn off as many post-processing effects as possible, using your TV manual as a guide, and then experiment with the ones that offer the best picture without causing too much blur. Noise reduction may be one of the most important settings to adjust if you’re experiencing a snowy or speckled image.
10. Get a Professional Assessment
If nothing you’ve tried above seems to resolve your fuzzy, blurry TV, it’s probably time to have a professional tech support person look at your TV. In some cases, it may be as simple as replacing a relatively inexpensive component. But if there’s something wrong with the core components of the TV, it’s often not worth the expense to replace those major parts. If your TV is still under warranty, you should refrain from letting anyone work on it, even if it is a minor problem. Instead, have it repaired and replaced under warranty.
