[PConline Knowledge Tips] For Xiao Bian, a person with such a large number of years, the least favorite thing is New Year, because it means that you are getting older. Older households along with people are old home appliances. The annual New Year's Day, May 1st and 11th are traditional sales seasons of the traditional home appliance industry. If you are recently guilty of buying TV, don’t worry, this article will be from multiple dimensions. Tell you what the TV should be.
Flat-panel TV products are numerous and complex. The average consumer does not have any research on the television type. When buying, there will be many questions. Today, the author introduces several purchasing methods here, I believe we can easily select them. Heart water machine.
Nowadays, the material living standard is continuously improving. Everyone will choose the IMAX version of the giant screen when watching movies. After all, it can provide a more realistic sense of presence. Similarly, when people buy flat-panel TVs, more and more people will tend to be large. The size of the product, but is not the more suitable to buy a larger size TV?
Actually, TV is viewed for a long time. If you watch it at an inappropriate distance for a long time, it will cause visual fatigue. Therefore, we should not blindly pursue large dimensions. The important thing is that it is in line with the viewing distance. TV sets have different space conditions and the viewing distance is different.
According to the viewing distance
According to the definition of CCIR, when the viewing distance is three times the height of the screen, the display effect of the high-definition television system should be equal to or close to the presence of a normal vision person when viewing the original scene or presentation. feel. In simple terms, the distance to watch TV should be three times the size of the TV. The specific calculation method is not repeated here. The following table shows the relationship between viewing distance and TV size under normal circumstances. Everybody can see at a glance.
The proper size can get a better viewing effect. Here, I suggest that you measure how far the viewing distance is before you buy a TV, so that you can better determine the required size. Of course, the corresponding data given in the above table is only a reference, and consumers can make appropriate adjustments according to personal preferences.
Smart features are not necessary
Today, smart features have become a major selling point for major manufacturers. It is expected that by the end of 2014, shipments of smart TVs in China will reach 20 million units. Judging from the current development trend, smart TV seems to have become an irreversible trend, and many people are hoping for the smart to pull the TV back to the home entertainment center.
What is a smart TV?
Under normal circumstances, we can understand that "smart TV" is a fully open platform equipped with an operating system that allows users to install and uninstall programs provided by third-party service providers such as software and games. The function is expanded, and a generic term for such a type of television that can be used for surfing the Internet through a network cable and a wireless network is provided.
Judging from the current situation, most smart TVs launched by color TV companies still remain in the conceptual stage and have not achieved substantial success in the terminal market. The author believes that the reason for this phenomenon is that companies do not pay attention to the research of TV-specific smart applications and content. Enterprises do not have their own content and application development teams, and even there are applications that copy applications on smartphones and other smart devices to fill the content and applications of smart TVs.
Most smart TVs still remain in the conceptual stage
In addition to content applications, the operating experience is also an important part of smart TVs. Although many smart products have been introduced such as voice control, gesture control, and mobile/Pad control to simplify the operation methods, they are actually used. However, these operations are still more complex. Smart TVs have to be really easy to handle and still have a long way to go.
The current smart TV operation mode is more complicated
At present, smart products are still in the initial stage, and many problems are encountered. For example, the development of content and applications encounter bottlenecks and the operation methods are too complex. Consumers cannot blindly pursue excessive new functions when they purchase TVs. After all, certain functions For us, it is not practical, or even not used at all. In the current form, we should pay more attention to the quality of television, but it is undeniable that intelligence is the development direction of future flat-panel TVs. We hope that in the future, There will be more differentiated applications and smoother human-computer interactions to support smart TVs.
â— Do you want to buy 4K Ultra HD?
At present, mobile phones and tablet PCs are constantly being upgraded in terms of display. Retina technology and 1080p are exciting. On television products, high-definition picture quality is once again regarded as a key point by the industry. Therefore, major TV companies have launched 4K. Ultra HDTV. We must admit that 4K TV is the trend of future picture quality development, and it is more in line with the nature of television. It can be predicted that after 4K, 1080p will definitely become the mainstream. However, it is not worth buying now. Let's take a look.
First of all, we must first know what is 4K. In fact, the 4K name derives from its lateral resolution of about 4000 pixels (pixel), for televisions, the resolution of 4K is 3840×2160, compared with the current mainstream 1080p (1920×1080), the 4K resolution is It shows 4 times the sharpness.
Comparison of HD (1080p) and QFHD (3840×2160)
For a large-sized TV set, such as 80-inch, 1080p is not very suitable, after all, watching at a proper distance will find the pixel of the film is overexpressed, that is, the grainy feeling will be more obvious, 4K is quite necessary. Although the current 4K resolution is quite hot, the five major panel makers have plans for developing products with 4k resolution, but the resolution change will involve a lot of things, even the entire industry chain will change, and according to the current situation, 4K resolution The rate is undoubtedly facing many obstacles.
Sony 4K TV 84X9000
First of all, from a technical point of view, 4K panels face technical difficulties; secondly, from an industry perspective, the 4K industry chain is far from mature. In this environment, why are TV manufacturers actively launching 4K Ultra HD products? Actually, one of the reasons is that the television industry has always been hardware-first. Whether it is high-definition television, Internet TV, 3D TV or smart TV, it has experienced the leading position of terminal hardware products. This development feature will also appear in ultra-high definition. TV industry.
4K industry chain is not mature enough
Flat-panel TVs are a very fiercely competitive field. The profits of mature products are not very rich. The main sources of corporate profits are emerging technology products and high-end products. Color TV companies have the inherent power to promote the adoption of higher-level technology products.
According to actual application conditions, 1080p is not yet popular, but there are already many 4K resolution products on the market, which is a good thing for the entire industry. From the perspective of consumers, the current 4K technology and industry chain are still not perfect, especially the lack of film sources, 4K TV prices are relatively high, so for most consumers, 4K is not very necessary, Of course, if you have enough money, or want to try fresh, it is understandable to choose 4K TV.
Compare prices before buying
Before the "price war" of Jingdong, Suning and Gome, China has made an important contribution to the history of e-commerce in China. Although during the price war, there are e-commerce sales promotion activities suspected of fictional price, but we get such a message, before buying home appliances, parity is an important process, because it may be negligence will buy It's expensive for hundreds of pieces.
Before buying, you can compare the prices of the electricity supplier
Nowadays more and more people choose to shop online. The obvious advantage of online shopping is that it is easy to compare the prices of goods. In order to facilitate the understanding of the current price of the product, the author here chooses the price comparison of popular TVs in the market. The comparison businesses include Jingdong Mall, Suning Tesco, Gome Mall and Yi Xun.
Because there are some dislocations and competitions between the e-commerce companies, there are quite a few goods out of stock. As a consumer, of course, want to buy the cheapest price, so I suggest that after you select a good model, you do not have to hurry to start buying, you can first compare the price, but also can take the price of electricity suppliers to the physical store bargain, Then you can be aware of it.
Edit summary:
For businesses, New Year's Day is a great opportunity to rush sales. Judging from past experience, the sales of flat-panel TVs will have significant growth on New Year's Day. In the article, the author introduced several purchasing skills for everyone. I hope that everyone can apply it to the real world and choose a good product that is suitable for you and that is cheap.
A Small Computer System Interface (SCSI) connector, also pounced as [scuzzy" connector, is used for physically connecting and transferring data between computers and peripheral devices.
SCSI is the small computer system interface, which is an independent processor standard used for the system level interface between computer and intelligent devices (hard disk, floppy, optical drive, printer, scanner, etc.). It is an intelligent universal interface standard, which has the function of communicating with various types of peripherals. SCSI uses the standard software interface of ASPI (SCSI programming interface) to make the driver communicate with the SCSI adapter installed inside the computer. SCSI interface is widely used in high-speed data transmission technology on minicomputers. SCSI interface has many advantages, such as wide application range, multitask, wide bandwidth, low CPU utilization, and hot plug.
SCSI connectors type and interfaces
Centronics 50-pin connector: The Centronics 50-pin connector was once the most widely used SCSI connector. An external connector only, the Centronics is a SCSI-1 connector that looks the same as the Centronics cable that attaches to a parallel port printer. The Centronics 50-pin cable comes in male and female styles, and gender changers and cable converters are commonly available. Although used on older SCSI devices and external drive enclosures, this interface is no longer heavily used, due to its slow speed and short cable lengths.
High-density 50-pin connector: The high-density 50-pin connector is used on scanners and Jaz drives. It is one of the more common SCSI connectors and is usually used to connect SCSI-2 devices. Both ends of the cable are usually 50-pin male, while the sockets on the host adapter and external devices are 50-pin female.
DB 25-pin connector: The DB 25-pin or D Sub 25 is by far the most widely used connector. This connector is used for parallel and serial printers in addition to the many other devices available. Both ends of the cable are usually 25-pin male, while the sockets on the host adapter and external devices are 25-pin female. This cable is almost always an external connector.
Note: DB-25 SCSI CABLES are not compatible with and should not be used as serial or printer cables; serial cables and printer cables should not be used or attached to DB-25 SCSI adapters. You can short out the SCSI host adapter or the motherboard by using the wrong cable. Marking cables is the best way to avoid this.
IDC50 connector: The IDC50 is the most common internal SCSI connector. It is very similar to the standard IDE internal ribbon cable. The IDC50 SCSI cable is considerably wider then an IDE ribbon cable; in fact, it is usually the widest standard internal cable in use. This is a standard SCSI-2 10MBps internal SCSI cable. Many low-end cables have only two or three connectors, allowing for one or two devices to be attached to the cable. Seven-device cables are available, though they are often expensive and require a large case, as the cables may be four or five feet long.
High-density 68-pin connector: The high-density 68-pin connector is the SCSI connector of choice for SCSI-3 host adapters and peripherals. There is an internal ribbon cable version that looks very similar to the IDC50 connector. Many low-end cables have only two or three connectors, allowing for one or two devices to be attached to the cable. Seven-device cables are available, though they are often very expensive and require a large case, as the cables may be three or more feet long. Both ends of the external cable are usually 68-pin male, while the sockets on the host adapter and external devices are 68-pin female.
SCA 80-pin Micro-Centronics connector: SCA stands for Single Connector Attachment, a type of disk drive connector that includes connection pins for the power cables as well as the data wires. A SCA connector uses an 80-pin plug and socket to connect peripherals. This connector combines power, data channel, and ID configuration for fast installation and removal. SCA connectors are typically found only on high-end SCSI hard disks. The SCA interface was designed to provide a standard connection for systems using drives that can be hot-swapped. SCA makes swapping SCSI hard drives much easier than with traditional SCSI cables, plugs, and sockets. An adapter enables SCA drives to fit into standard SCSI enclosures.
SCSI SFF 8482: Also called "4x internal" by some vendors. This is a connector with the same form factor as SATA with the addition of a "bump" to key it specifically for SAS. (SATA drives can be plugged into SAS controllers, but SAS drives will not function with a SATA controller; hence, the necessity for the key bump on the connector.) As the name says, it's meant to be used internally, i.e., inside the computer case.
SCSI SFF 8484: Also called "32-pin" or "MultiLane". This is a high density connector usually intended to plug into the motherboard, controller, or backplane itself. Cables with this connector on one end usually have four individual SFF 8482 connectors on the other.
Serial Attached SCSI SFF 8470: Also called "4x external" by some vendors. This is simply a version of the SFF 8484 that's meant to be used with external (i.e., not located within the case) drives.
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