Traditional Culture Encyclopedia - Photography major - Suzhou dayi visual photography
Suzhou dayi visual photography
intruder
With its unparalleled visual shock and rich and delicate picture performance, LCD TV is making more and more consumers turn their hearts into action. If you have the idea of selling in the near future, you might as well do your homework first. No.65438 +0 LCD screen is divided into PC screen and special AV screen due to different technologies and processes. The cost of ordinary PC screen is cheaper than the special AV screen of the same size 1000 yuan, and its performance is much worse. Generally only used for LCD screen of PC or notebook. For reasons such as cost or difficulty in purchasing, some manufacturers shoddy, which requires consumers to be extra vigilant, especially some LCD TVs that are particularly cheap. NO.2 screen format We generally refer to the aspect ratio of the screen as the screen ratio. At present, the screen ratio of LCD TV is generally 4∶3 and 16∶9. 16∶9 is the most suitable format for human eyes, with stronger visual impact. At the same time, the display format of digital TV in the future will also adopt 16∶9 format. At present, 4∶3 is a more suitable display format for analog TV signals. If it is mainly used for watching TV, it still has certain advantages. It should be pointed out that at present, many TVs with 16: 9 and 4: 3 formats can adjust the display format of the picture through the menu, but this is at the expense of wasting a certain screen area. If it is mainly used to watch TV, it is recommended to choose a 4∶3 product, otherwise the stretched picture will make you unbearable; For DVD blockbusters, it is recommended to buy 16∶9 products, because 16∶9 will bring visual enjoyment that 4∶3 can never achieve. NO.3 main performance indicators among the performance indicators of LCD TVs, brightness, contrast, resolution and viewing angle have the greatest impact on consumers' visual experience. Brightness refers to the brightness of the picture in CD/m2 or nits. At present, there are two ways to improve brightness: one is to improve the light transmittance of LCD panel; The other is to increase the brightness of the backlight. At present, the mainstream brightness is above 250 CD/m2, but the highlight products are gradually popularized. Generally speaking, a product with a CD/m2 of more than 400 is a bright spot. High brightness can make the displayed picture clearer and more vivid, especially suitable for playing DVD movies. As for the comparison, the mainstream products are between 400∶ 1 and 500∶ 1, with little difference, but some high-end products are above 800∶ 1, so don't care too much when purchasing. The contrast is too high, for example, above 400, which is of little practical significance and can't be distinguished by human eyes. Resolution will affect the clarity of the picture. The high-resolution LCD TV screen is clear and delicate, with bright and sharp edges. Too low resolution will make the picture rough and have obvious graininess at close range. Generally, the resolution above 1024×768 has the characteristics of HDTV. For home use, the viewing angle of LCD TV is naturally better. The larger the viewing angle, the larger the spatial range in which the user can see a clear and perfect picture. NO.4 point-to-point distance generally refers to the distance between two adjacent pixel points. The calculation method of the point distance is the value obtained by dividing the panel size by the resolution, but the point distance of LCD TV is far less important than CRT. NO.5 reaction time the so-called reaction time is the speed at which each pixel of the LCD TV reacts to the input signal, that is, the time required for the pixel to change from dark to bright or from bright to dark? Its principle is to apply voltage to liquid crystal molecules to make them twist and recover? . Commonly used 25ms and 16ms refer to this reaction time. The shorter the reaction time, the less users will feel procrastination when watching dynamic pictures. According to the data, the response time is 30ms = 1/0.030 = the TV can display 33 frames per second, which can meet the needs of DVD playback. Reaction time 25ms = 1/0.025 = TV can display 40 frames per second, which fully meets the needs of DVD playing and most movies or games. NO.6 backlight life LCD panel itself cannot emit light, which belongs to backlight display device. There is a backlight behind the LCD screen. LCD TV relies on the LCD unit on the panel to "block" and "turn on" the light emitted by the backlight to restore the picture. It can be found that as long as the LCD is powered on, the backlight will start to work, and even if the displayed picture is all black, the backlight will remain working. Because the light transmittance of the LCD panel is extremely low, the brightness of the LCD TV should reach the level of restoring the picture. The brightness of backlight should be at least 6000 cd/m2. The life of backlight is the life of LCD TV. Generally, the backlight life of LCD TVs is basically over 50,000 hours. In other words, if you use LCD TV for 5 hours every day on average, the life span of 50,000 hours is equivalent to 27 years. At present, there are mainly three color TV systems in the world, namely NTSC, PAL and SECAM, and the three systems cannot be unified at present. China adopts PAL-D system, so LCD TVs used in China should at least be compatible with PAL-D system. Generally, LCD TVs are compatible with the above TV systems, but it is best to confirm them before buying. NO.8 sound output power LCD TV has at least two built-in speakers in order to make sound normally, and its power determines the maximum sound intensity that the speakers can emit. Because the main function of LCD TV is not to enjoy music, the power of sound is not very important. In contrast, sound quality may be more important. At present, the power of LCD TV speakers is 2 to 10W. Of course, if the LCD TV needs to be connected to the home theater, it will not bypass the power amplifier unit, so the sound output power of the LCD TV can be ignored. Interface 9 takes into account that LCD TV should be connected with home theater and computers and other peripherals. Therefore, in addition to the necessary AV and S-video interfaces, DVI and D-sub interfaces, optical fiber output and so on, we should also investigate.
Improve the article
What's the difference between LCD PC and LCD TV?
I believe that if you pay attention to PC dynamics, you will find that desktop PCs are developing in the direction of home appliances and humanization in the past two years. An obvious configuration change is the TV function in the home appliance PC. In essence, it is to add a TV card to the PC host, whose function is to receive TV programs. The LCD TV produced now can also be used as the display of PC. Then, if you want to buy an LCD XX for study, which is also a computer monitor and TV, should you choose an LCD TV or an LCD PC with TV function? In this regard, the expert's suggestion is: LCD TV has more TV elements, and its price is about 1000 yuan higher than that of LCD monitors of the same grade. And LCD PC? Especially some low-priced LCD PCs) are mostly ordinary LCD monitors or some entry-level LCD monitors. So no matter which product you use, if you use it to watch TV for a short time and the picture quality is not high, you can consider using LCD PC. More importantly, it is still a computer, and the investment will not be much more expensive than LCD TV. However, if you have a high demand for image quality, and you don't use computers very often, or you already have a computer, then you can consider LCD TV.
Beware of LCD TV "shrinking"
At present, there are many kinds of LCD TVs on the market, including 15 ",17", 20 ",26", 27 ",30" and 32 ". Industry insiders remind consumers that there is no unified national standard for LCD TVs at present, which provides an opportunity for some small factories or illegal vendors, and the screen will shrink. So pay attention to comparison when buying, and try to buy products of famous brands in reputable stores.
Market article
Toshiba pushes 37-inch "flying vision"
Following the "Fantasy Vision" series of 26-inch and 32-inch LCD TVs unveiled in early August, Toshiba, an internationally renowned company with world-leading technology in the field of high-definition multimedia, recently launched the latest 37-inch LCD TV. It is understood that Toshiba's new "Phantom Flight Vision" product has broken through the insurmountable constraints of LCD TV brightness and small screen, and made a very reasonable match between brightness, color, screen size and comfort and health. It uses Toshiba's unique "new digital screen back-end processor"? 65.438+70 million goat phalanx technology, 6.22 million pixel oversampling? , high contrast display screen with brightness up to 500 cd/cm2 and 600∶ 1 In addition, its other major feature is the application of all-digital image processing technology, which has changed the previous analog processing of TV signals, digitally integrated YC separation circuit and color decoding circuit, and truly restored high-precision texture and natural and smooth images. Coupled with the large display screen, it will well meet the extreme requirements of users and make them get the greatest visual image experience. In addition, the "Morph Vision" 37-inch LCD has a powerful home theater composite video interface, and it is fully compatible with1125i/1080i/750p/720p/576p/576p/480p/480i video signals, which can support up to 680i. In particular, it also has a response speed of15ms, a wide visual range of 176 degrees, and a long service life of 50,000 hours, which fully reflects Toshiba's leading scientific and technological strength in the industry.
LG55 inch LCD leads the high end.
LG Electronics recently developed the world's largest size-55-inch LCD TV, which is the world's first large-size commercial LCD TV over 50 inches. Its picture quality is twice that of the current high-definition digital color TV. More importantly, LG installed a set-top box for receiving digital signals on this product. This cutting-edge technology promotes the digitalization of LCD TV to a new height. As a result, LG Electronics has further consolidated its leading position in the market of large-size flat-panel display devices. Look at the chronology of LG Electronics, from the establishment of 1958 to the present? Items that record "most" and "first" abound. 1959, 1965 and 1966, LG electronics successively developed and produced the first transistor radio, refrigerator and TV set in Korea, 1969 developed and produced the first washing machine, air conditioner and elevator in Korea, and 1982 developed and produced the first transistor radio, refrigerator and TV set in Korea. At the high-end level, LG Electronics has always been at the forefront, not only a pioneer in leading fashion, but also a leader in controlling cutting-edge trends.
Sanyo's listing of large-screen LCD TVs in China has just activated the LCD rear projection market in China, making a big profit. This week, Sanyo broke the news that Sanyo's 27-inch and 30-inch VIZON series large-screen LCD TVs will also land in China market in the near future, following the "asking for directions" of small and medium-sized LCD TVs in 15 inch and 20 inch VIZON series last year. It is worth noting that Sanyo's VIZON series large-screen LCD TVs have achieved the highest brightness in the industry and are equipped with Sanyo's unique second-generation HD "VIZON engine" technology. At the same time, news from major shopping malls in China shows that the LCD TV market in China is experiencing the biggest price "collective diving" in history, with the highest drop of 20%. However, Deyong, general manager of Sanyo TV, believes that the collective diving in the LCD TV market in China is a good sign. He believes: On the one hand, with the cost reduction, the global LCD panel will reach a balance between supply and demand, and the price of LCD TV will naturally tend to be rational. TV manufacturers will have more choices, and the LCD TV market in China will be mature and standardized. On the other hand, the price reduction after the mature market can benefit consumers in China, so as to realize "high-end but not high-priced" LCD TV, and make LCD TV highlight a broader market space.
Gossip: 30-inch LCD is expected to fall below 8000 yuan next year!
Due to the release of the global LCD TV production line, the domestic LCD TV market is expected to significantly reduce prices next year. At the seminar on the development and market prospect of high-end color TVs held yesterday, experts in the industry said that the current 30-inch LCD color TVs of about 20,000 yuan are expected to drop below 8,000 yuan next year. Industry experts predict that 2005 will be the "turning point" of LCD TV, and the sales of LCD TV will be released in large quantities. There will be six fifth-generation LCD panel production lines, three sixth-generation LCD panel production lines and two seventh-generation LCD panel production lines in the world, which will increase the monthly output of LCD panels by at least 500,000 pieces, most of which will be invested in TV manufacturers. This will reduce the price of LCD panels, which will drive down the price of LCD TVs. Zuo Yingjie, CEO of Skyworth Beijing Branch, said that according to IDC statistics, the global share of LCD TVs over 30 inches was 4% in 2003, but it will rise to 43% in 2007, and if products with 23, 25, 27 and 28 inches are added, it will exceed 50%. Zuo Yingjie believes that with the expansion of the market and production capacity, the cost of LCD TV is further reduced, and the price reduction is reasonable.
What problems should consumers pay attention to when purchasing LCD TVs?
■ Cost-effective under 32 inches.
In the first half of 2004, 70% of LCD TV sales in the domestic market were still concentrated on 15- 17-inch products below 5000 yuan. Most of the products of this specification are placed in the study and bedroom, which plays the role of "the third TV". In 2005, the price-performance ratio of LCD TV below 32 inches was enough for consumers to value it.
Statistics show that since August last year, the price of LCD TV panels has dropped rapidly, with a drop of more than 40% so far. Among them, the price drop of panels over 20 inches is the most obvious. Take the 32-inch panel as an example. In June this year, the quotation of 5438+ 10 was lower than that of February last year by 12.5%. At present, the average price has dropped to about 5600 yuan. At the same time, the sixth generation line of each panel factory continued to accelerate mass production, and the main size was mostly locked at 32 inches. According to the report of upstream manufacturers, it is estimated that the price of 32-inch LCD panel will fall below 5000 yuan in the second half of this year. At the same time, the prices of 30-inch, 22-inch and 20-inch LCD panels also showed a downward trend.
As far as 37-inch LCD TV is concerned, the lowest price of domestic brands is about10.9 million yuan, but it has begun to move closer to the price of 42-inch plasma. The industry estimates that the speed of 37-inch LCD TV will drop to 6.5438+0.5 million yuan soon. It will pose a greater threat to the 42-inch plasma.
As for large-screen LCD TVs over 37 inches, at present, they can't reach the scale of mass production, and there is no advantage in cost performance. It's just a product launched by manufacturers that impacts the market, so ordinary consumers don't have to rush to buy it. Only after the seventh and eighth generation production lines in the world reach mass production scale can the price come down. But at present, only one company in the world, Sharp, owns the seventh generation LCD panel production line.
■ The screen is too big, and it is easy to feel oppressive.
The traditional TV display screen is advertised as 17 inch in the manual, but its panel is about 1 inch around, so it cannot be used for display, and the actual visual size is only about 15 inch. The LCD screen is marked with 15 inch, and the actual visible size is 15 inch. Consumers should choose the appropriate size according to the size of the room when purchasing the machine to avoid the oppressive feeling caused by the large screen. If the living room area is about 30 square meters, choose a 32-inch LCD TV.
■ The contrast ratio of 500:1is better.
If consumers prefer to watch discs and pursue picture effects, they should choose high-contrast LCD TVs. Generally speaking, the contrast ratio of LCD TV should be above 300: 1. If the contrast is not enough, the picture will appear dim, without a sense of hierarchy and lack of expressiveness. Generally, the screen contrast of entry-level models is 300: 1, and that of medium-sized models is 450: 1 and 500: 1.
■ The brighter the better.
LCD TV often needs to be watched in bright environment with lights on, so pay attention to its brightness index. Under normal circumstances, the maximum brightness of liquid crystal should not be lower than 100 CD/m 2. At present, the brightness of products on the market is generally above 300c d/m2. Of course, the brightness of the product is not as bright as possible. If the screen is too bright, people will feel tired if they look at the screen for too long. For long-term users, it is also necessary to avoid the influence of strong light on the efficiency of use.
■ The service life is not less than 50,000 hours.
Some low-priced LCD TVs also have a short life span, so pay special attention. The life of backlight is the life of LCD TV. Generally, the backlight life of LCD TV is more than 50 thousand hours. In other words, if you use LCD TV for 5 hours every day on average, the life span of 50,000 hours is equivalent to 27 years.
■ The response speed shall not be lower than16 ms.
The biggest difference between LCD TV and plasma is that LCD TV has the advantages of low power consumption and no radiation due to different imaging principles, but it has shortcomings in image response speed. For example, LCD TV with slow response speed has obvious sawtooth when switching scenes quickly, such as chasing cars. So generally speaking, the response speed is not lower than 16m s, which will be better.
However, it is not difficult to find that almost all brands will display static high-definition DVD discs when displaying LCD TVs. If consumers do not understand this mystery, or do not put forward the effect of watching TV programs, it is difficult to detect this defect of LCD TV. However, there is a relatively simple way to test the reaction speed, that is, you can slide the screen by hand to see the flow speed of the waterline.
■ 16: 9 Choose carefully.
At present, the mainstream of large-size LCD TV is 16: 9 screen. If you choose LCD TV with 16: 9 screen now, when watching TV programs, the image will be slightly distorted when it is enlarged to full screen in equal proportion (for example, the characters on the screen will look a little fat). If you keep the 4: 3 image, you will waste some left and right screens. However, LCD TVs under 20 inches are still dominated by 4: 3 screens.
- Related articles
- Huawei's mobile phone photos are too blurred. How to adjust it?
- Vivox9s configuration
- Wandering in the shadow of "nightmare", my neck is 0 1 and there is such a side!
- Research and development cost of camera lens
- How about Hefei Midea Refrigerator Factory
- What's the extra charge for taking photos at the wedding dress shop?
- Demining and mine laying
- Why is the game yin set to the Japanese background?
- What do you mean I'm a little photographer?
- Event Planning Services Agreement