This article is mainly about the introduction of LCD screens, and focuses on the types of LCD screens and their brands. The current LCD panel manufacturers mainly include Sharp, Samsung, LG-Philips, AU Optronics, Chi Mei Electronics, and BOE. The wide viewing angle technology of LCD TV panels is divided into TN+Film (soft screen) camp, IPS (hard screen) camp, and VA (soft screen) camp. Each has its own merits, let's take a closer look now. 1. TN+Film viewing angle extension film (soft screen) This technology is still based on the traditional TN mode liquid crystal, but a filming process is added in the manufacturing process. The biggest feature of TN+Film wide-angle technology is its low price, low technical entry barrier, and wide range of applications. In general, TN panel is a product with obvious advantages and disadvantages. The price is cheap, the output gray level is small, the liquid crystal molecule deflection speed is fast, which makes it easy to improve the response time, and its response time can meet the requirements of the game. The advantage lies in the unsatisfactory viewing angle and unreal color performance are its obvious disadvantages. Therefore, liquid crystal displays using TN panels currently sold in the market generally use improved TN+FILM (compensation film) to make up for the lack of viewing angles of TN panels. At the same time, the use of color dithering technology makes the original display only 26 Wanse's TN panel has gained 16.2M display capacity. 2. The biggest selling point of IPS (In Plane Switching plane control mode) wide viewing angle technology (hard screen) is that its two poles are on the same surface, unlike other liquid crystal modes where the electrodes are arranged on the upper and lower sides, three-dimensionally. Since the electrodes are on the same plane, the liquid crystal molecules are always parallel to the screen regardless of the state, which will reduce the aperture ratio and reduce the light transmittance. Therefore, the application of IPS to LCD TVs will require more backlights. The black it restores is slightly worse than that of PVA, so it needs to rely on the compensation of the optical film to achieve a better black; another feature of the IPS mode liquid crystal display is that if you observe at an oblique angle of 45 degrees, you will see a similar TN mode That kind of grayscale reversal phenomenon can be used as a sign to distinguish IPS. IPS also has the disadvantages of slow response time and difficulty in improving contrast. (S-IPS and AS-IPS are improved types of IPS technology) 3. VA type panels are the most popular types of high-end LCD applications. The 16.7M color number and large viewing angle are the capital of this type of panel positioning. At the same time, the VA type can be divided into MVA panels and PVA panels. 1. MVA (Multi-domain VerTIcal Alignment) (soft screen) mode liquid crystal display, the long axis of the liquid crystal molecule is not parallel to the screen like TN mode when it is not powered on, but perpendicular to the screen, and each pixel is It is composed of a plurality of such vertically aligned liquid crystal molecules. 2. PVA (Patterned VerTIcal Alignment, vertical orientation configuration) wide viewing angle technology (soft screen), PVA wide viewing angle technology also belongs to the category of VA technology, in fact, it is very similar to MVA, which can be said to be a variant of MVA. PVA uses transparent ITO electrodes to replace the protrusions of the liquid crystal layer in the MVA. The transparent electrodes can obtain a better aperture ratio and minimize the waste of the backlight. This mode greatly reduces the possibility of "bright spots" appearing on LCD panels, and its status in the LCD TV era is equivalent to the "long tube" in the CRT TV era. Samsung's PVA mode wide-view technology is widely adopted by Japanese and American manufacturers due to its strong production capacity and stable quality control system. At present, this technology is widely used in high-end LCD TVs. (S-PVA is an improved type of PVA technology) Fourth, CPA (ConTInuous Pinwheel Alignment, continuous firework-like arrangement) mode wide viewing angle technology (soft screen), CPA mode wide viewing angle technology is strictly speaking a member of the VA camp. The liquid crystal molecules are arranged in the form of a firework radiating toward the center electrode. Since the electric field on the pixel electrode changes continuously, this wide viewing angle mode is called "continuous firework arrangement" mode. The CPA is promoted by Sharp, the "father of LCD". It should be noted that the ASV that Sharp has always promoted does not actually refer to a specific wide viewing angle technology. It uses TN+Film, VA, and CPA wide viewing angles. Technology products are collectively referred to as ASV. In fact, only the CPA mode is the wide-view technology created by Sharp itself. The products of this mode are basically equivalent to MVA and PVA. In other words, Sharp’s LCD TVs may not use Sharp’s own CPA-mode LCD panels. It may use Taiwanese manufacturers’ VA-mode panels or other manufacturers’ LCD panels. Let’s talk about the development of LCD monitors. When they first became popular, they replaced bulky CRT monitors. However, as far as the most basic function of monitors is to display the picture, compared with CRT monitors, except for clear and sharp fonts and no flicker, they are all Disadvantages: poor color performance (especially the popular TN panel in the early stage), font image distortion under non-standard resolution is ugly, smear is serious, and light leakage cannot display a pure black screen. After a long period of time, two important development directions for liquid crystal displays, one is to increase the display area, and the other is to improve the display quality. The former is easy to understand, and after reaching the physical limit of 27 to 32 inches, it completely stagnated. The latter is the application of many new technologies: LED backlight, VA/IPS/PLS panel, 10bit panel, overload drive and so on. But... but it's not. For 90% of consumers, they are facing a screen at home/office, and there is no other comparison. What do you say? There is no harm if there is no contrast. No matter how bad the display is, as long as it shows that the leaves are green and the flowers are red, even if the leaves are not so green and the flowers are not so red, it will not affect the user's understanding of the image. To improve the display quality, it is more convenient to change to a new monitor than to change the wallpaper. Even if a small number of users engaged in image processing seem to have high requirements for display quality, it is actually nonsense. No matter how good your monitor is, the color of the adjusted photo is infinitely close to the real... However, unless you are in the printing industry and want to print/print this picture, otherwise the photo will be sent to others to see, and others use a color cast monitor to see it. , The leaves are still not so green, and the flowers are still not so red... Since the development of the first direction has stagnated, the effect of the second development direction is not so good, so the influence of the third development direction of liquid crystal displays is getting bigger and bigger: reducing costs. The 27-inch monitor I use now costs more than 7,000 when I bought it 8 years ago. Now I buy a 27-inch monitor, and the cheaper one is just over 1,000. If you say that everything except the panel is made of the same materials, you Would you believe it? Then, at that time, the 27-inch monitor for a small group of high-end users could make a thousand by selling one more manufacturer, so it is okay to increase the cost slightly and make a good product to expand sales. Nowadays, the 27-inch monitor for mainstream users has a single model sales of hundreds of thousands and it is difficult to grow. Based on the sales of 100,000, a cost savings of 50 yuan is a profit of 5 million. What do you do if you change it? Well, it's finished, let's talk about the brand. Due to the strength in the panel market, Korean companies (in fact, LG and Samsung) can always gain advantages in one aspect or more of their displays. In recent years, the hot sales of Samsung mobile phones have brought about the value-added of Samsung's brand. In addition, Samsung's consistent corporate style: full-line attack, high, middle and low end products have corresponding products, which establishes the current market position of Samsung Display. LG, because of its brand marketing strategy, cannot compete with Samsung at the same price level, so the price is more affordable than Samsung. The products of these two brands are still consistent in Korean style: cheaper than European, American and Japanese brands, and better quality than domestic and Taiwanese brands. Because the cost of the panel cannot gain an advantage, and the prompt of the panel quality is far less attractive to consumers than the low price, so European, American and Japanese brands have almost completely collapsed in this market. Only Dell and HP rely on the strong bargaining power of panel and other raw materials brought by the sales of branded machines, and they can still occupy a place in this market. And because of the huge profits of the whole machine (two thousand yuan for a display, the number of people who buy it at the price of 300 is much less; but after considering all aspects of a whole machine for 8000 yuan, most people choose 6-800 expensive), The quality of high-end models basically follows the high standards of European and American companies, and is generally better than Korean products. However, the low-end models are basically OEMs from domestic manufacturers, and everything gives way to cost. On the contrary, they are not as good as Korean brands, and even weaker than Taiwanese brands. As for the mid-end, it depends on the character, maybe better than Korean enterprises, maybe worse than Korean enterprises, it is worth mentioning that Dell's after-sales service is as good as ever. The European and American brands that are still alive if they don’t make the whole machine and do the monitor seem to be left with Philips and ViewSonic. Apart from the brand, Philips has nothing to say. The mid-to-high-end has no advantage compared with Korean companies, and the low-end is basically the same. Domestic OEMs, ViewSonic still has a certain share in the professional market (such as multi-screen splicing, medical treatment, graphics, e-sports, etc.), but overall it is half-dead. As for Japanese companies, the high-end market used to be dominated by Japanese brands such as EIZO, NEC, and Iiyama. The mainstream is also high-end, and Sony is also carrying it. Now they have basically disappeared (this is the end of LCD monitors with high prices and high quality). Next is the Taiwanese brand. Acer and Acer are similar to Dell and HP. However, because the brands are originally cost-effective, there is no such thing as saying that the quality of high-end models is quite good. But the mid-range model is generally considered conscientious. One of the weird brands in the Taiwanese series is ASUS. Relying on the reputation of the motherboard brand, it can perform well in most DIY markets. ASUS monitors are also in line with the impression given to me by other ASUS products: high-end is not bad but expensive (especially ROG Faith Series). The mid-end is average, and the styling is usually a bit new, but it's still expensive. Low-end... The materials are poor but enough, the workmanship is OK but the price is not cheap. Finally, there are domestic brands. This is almost AOC and HKC. Relying on many domestic panel companies that have received a lot of policy subsidies, they take the cost-effective route, and the quality is all about it, but the display is not so easy to break than most other computer parts. The low-end models of the several brands mentioned just now are all OEMs from domestic manufacturers, and they are talking about them. Incidentally, these two have several sub-brands. For example, Great Wall Display is owned by AOC, and Hyundai Display is owned by HKC... As for your first question, since the price is 2000, then there can be some special requirements. It depends on your own choice (the following suggestions are not prioritized): 1. Samsung's PLS curved screen. However, I personally feel that there is not enough width to match. Curved screens are just a few days old. Only 29 fish screens or larger screens can use curved screens to reflect the advantages of flat screens. 2. AOC's 4K. Although 1050 can't bring 4K, it can be reduced to 1920*1080 when playing games, and it will not be blurred if 2:1. It is good to cooperate with Win10 on other occasions. However, the 4K at this price must be a TN screen, and the 27-inch TN screen is easier to detect the color cast. 3. Dell's P series. Counting entry-level image processing, the color performance is pretty good, worthy of this price. If you don't pursue color accuracy or something, there is no need to buy it. 4. Both AOC and ASUS have 144KHz models at around 2K price points, so gaming can be considered. However, if the resolution is 1080, most games with 1050TI will not be able to get this refresh rate. 5. The above features are not needed. Samsung's ordinary monitor is just fine. The milk tea house sells 1,300, so you can upgrade the graphics card to save a little money. Liquid crystal displays mainly look at those parameters 1. Brightness: Brightness is an important indicator of liquid crystal displays. The low brightness caused by technical reasons will directly affect the visual experience of liquid crystal displays, and the experience is even more difficult to talk about. The brightness index is usually expressed in cd/m2. The image performance that can be obtained by a liquid crystal display up to 200cd/m2 may already surpass that of traditional CRT monitors. Of course, the higher the brightness index, the higher the display contrast, and the color of the screen. The brighter and brighter the current mainstream 15-inch LCD monitors are, the brightness is mostly 200~350cd/m2. Technically speaking, the brightness and uniformity of liquid crystal displays are related to the number, brightness and arrangement of the backlight tubes. 2. Contrast: Contrast is often difficult to measure accurately with instruments, and often becomes one of the most controversial indicators. But one thing is the consensus of the industry-the greater the contrast is not the better, it must be matched with the brightness to create the perfect color. Many components used in liquid crystal panels have a certain impact on contrast, such as control ICs, color filters and even orientation films. Only a suitable contrast can make the LCD display ideal gray scale and color scale, so as to achieve a full and rich image effect. 3. Viewing angle: This indicator defines the maximum range of the screen that can be viewed. If the viewing angle is relatively small and the user's line of sight is slightly biased (that is, not directly facing the screen), the display screen cannot be seen clearly, or even cannot be viewed at all, because the brightness of the screen outside the viewing angle area is weak. At present, the horizontal viewing angle of most 15-inch LCDs on the market is 100 to 140 degrees, while the vertical direction is slightly smaller. Some large LCD display manufacturers use MVA technology (multi-area vertical alignment technology) to widen the viewing angle, and some even reach 160 degrees or 170 degrees. Of course, its price will rise accordingly. Consumers also need to pay attention to the cost performance. . 4. Response time: This indicator determines the performance of the liquid crystal display for fast moving pictures. A short response time will result in a clean picture. A long response time may cause the display to have afterimages and tailing, especially when playing fast pictures. , Too long time will inevitably cause delays, which has become a major obstacle to enjoying DVDs and playing games. The indicator unit of this technology is ms, and 25ms has become the standard response time of most liquid crystal displays. Although it is still incomparable with CRT monitors, there is no longer any obvious tailing phenomenon when watching DVDs and playing most games. For this indicator, it should be noted that many manufacturers use half-process response time instead of full-process time. 5. Individual and fashionable appearance: The reason why LCD monitors have attracted the attention and favor of consumers is that, in addition to their own non-radiation and other characteristics, the novel appearance design and not taking up too much space are the highlights. In the future, the computers placed in our homes will be fashionable and classic products of information appliances. Especially in this era of publicity, the appearance design of LCD displays has become a big selling point in the purchase choice. This is our guarantee of performance when purchasing products. Need to be carefully selected under the premise. This is the end of the related introduction about the LCD screen. If there are any deficiencies, please correct me. 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