In the blink of an eye, the sales season of Jin Jiu Yin 10, many consumers began to consider buying a flat-panel TV. After a round trip to the store, the LED LCD TV boom is inevitable...
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Unlike the previous high price, LED LCD TVs have different prices. On the eve of National Day, after the LED LCD TVs of LG and Skyworth have been listed in series, the actual sales of LED LCD TVs have been pulled a lot. Many consumers who are holding money to buy have begun to release their enthusiasm for consumption. Then, in the face of the new power in this LCD TV, how can consumers pick a truly outstanding LED LCD TV? Experts remind: look at the panel first, and then backlight.
Buy LED LCD TV Cheats 1: Panel is the key
At the beginning of the launch of LED LCD TV, a brand directly named it "LEDTV", and the results were questioned by industry insiders and consumers. Why? In the traditional sense, the name of the TV screen technology will be used as the basis for TV naming. For example, CRT TV is a TV that uses a cathode ray tube (CRT) in the display. LCD TVs are televisions that use liquid crystal display (LCD) technology on the display. So in the true sense of LED TV, it should be a TV with LED panel. The so-called "LED TV" has nothing to do with the LED image display, but the LED light source is added to the backlight of the LCD TV. Therefore, this kind of TV should be called "LED-backlit LCD TV".
The naming dispute from another side actually reflects the key and important aspects of the panel. Because the panel is the real factor that determines the quality of the picture, the backlight is actually just an improvement. In principle, unlike CRT and PDP TVs, LCD TV screens cannot emit light by themselves, requiring an external light source to aid imaging. The light emitted by the external light source is adjusted by the angle of the liquid crystal molecules in the liquid crystal panel, and is refracted to produce a picture. Therefore, for LCD TVs, the panel has always been the core of the LCD. The quality of the panel is the key to determining the quality of the screen display. It also determines the quality of the LCD by more than 60%.
When it comes to panels, the advantages of IPS hard screens have to be mentioned. Compared with the VA soft screen, the IPS hard screen is horizontally arranged by the creative, which improves the stability of the liquid crystal screen, and has the characteristics of stable picture, fast response time, higher dynamic image quality, wide viewing angle and small color distortion. In the LCD TV, the product with the IPS hard screen panel has the best picture quality, and is widely welcomed by the whole machine manufacturers and consumers. In the LED-backlit LCD TV, the model with the IPS hard-screen panel is also the best. Because of this, IPS hard-screen LCD TVs have been in short supply. Experts reminded that the method of judging whether the hard screen is simple is just a touch of the TV screen, because the IPS hard screen does not generate water ripple when touched like a soft screen.
Buy LED LCD TV Cheats 2: Backlighting has a choice
After reading the panel, look at the backlight. LED LCD TV is a liquid crystal TV that replaces the commonly used cold cathode tube light source (CCFL) with a light-emitting diode (LED) as a backlight. Although the panel technology has not changed, the backlight changes still bring about an improvement in image quality. According to authoritative tests, LED LCD TVs have been greatly improved in terms of picture performance, environmental protection and energy saving, ultra-thin appearance, color performance, etc., and direct-lit LED LCD TVs are playing these features.
The so-called "straight down" refers to an arrangement of LED backlights. The LCD module adopting this method is currently the main push of LGDisplay. In addition, the LED light source has a kind of “side-side typeâ€. The side-light type LED system installs LEDs around each panel to make the light source shine from the side, and the generated light is behind the panel and the light guide plate. Spread between and then communicate to the picture. The advantage of this method is that the thickness can be reduced, which is advantageous for achieving an ultra-thin appearance, but the image quality is lost to some extent.
In comparison, "straight down" has an advantage in image quality. The “straight down†mode distributes the LED evenly behind the panel, and the light diverging from the light source can be evenly transmitted to the entire screen. At the same time, it uses LocalDimming technology to significantly increase the brightness ratio. LocalDimming divides the LED backlight unit into a chessboard, and controls each area separately. When the black color is displayed, the light of the corresponding LED area is directly turned off, which can display a perfect black color. Therefore, people in the industry generally believe that "straight down" can more accurately present images and show excellent color and contrast between light and dark. Taking the 55-inch product as an example, LGLED's LG direct-type product evenly distributes more than 3,000 LED lights on the back of the panel, so that the backlight can be evenly transmitted to the entire screen, and the picture details are more delicate and realistic. The same is a 55-inch LED LCD TV, a brand side-light type is installed more than 400 LEDs in the frame of the panel, so that the light source from the side. Although this can minimize the thickness, but because of the reduction of the number of LED lights nearly 7 times, the impact on the picture quality is self-evident.
The straight down method is good for image quality, but it is technically more difficult to achieve ultra-thin. Since the emission of LED light requires a certain amount of space, in order to reduce the thickness, it is necessary to install more LEDs more closely, to minimize the wide diffusion space or separate the substrate parts such as the tuner and the power supply unit separately. Because of this, LGDisplay's direct-lit LED backlight system with thickness control up to 2.4cm is very amazing for the industry. It solves the dilemma between image quality and ultra-thin appearance, and LGD is still in high-end IPSLED panel. Adding 240Hz technology, which makes its dynamic picture quality more high-end, is considered by the industry to be the top high-end work in the LED field.
LED LCD TV is the trend of the times. In the face of the upcoming sales season, the market performance of LED LCD TVs is worth looking forward to. But at the same time, experts remind consumers that LED TVs are also the same. In addition to the differences in the panels, some manufacturers mainly use direct-lit backlights, while some manufacturers focus on side-lit. The difference in focus reflects the different value choices of the manufacturer in terms of image quality and ultra-thin appearance. When purchasing, consumers should make their own rational judgments according to their own preferences and pursuits.
USB3.0 - also considered SuperSpeed USB - for those with PC or audio / high-frequency device to provide a variety of devices connected to a standard interface. From the keyboard to high-throughput disk drive, a variety of devices can use this low-cost interface for smooth operation of the plug and play connectivity, users basically do not spend too much thought in it. The new USB 3.0 to maintain compatibility with USB 2.0 also provides several enhancements to the following:
Greatly increased bandwidth - up to 5Gbps full duplex (USB2.0 was 480Mpbs duplex) to achieve better power management enables the host to provide more power for the device to achieve USB-rechargeable battery, LED lighting And mini-fan applications. Enable faster identification of the host device the new agreement makes data processing more efficient USB 3.0 storage device can be limited by the rate of transferring large amounts of stored files (such as HD movies).
For example, a use of USB 3.0 flash drive in the 3.3 seconds to transfer 1GB of data to a host, and USB 2.0 requires 33 seconds. Consumer electronics devices by increasing the resolution and storage performance requirements driven by the hope that through a broadband Internet connection to achieve wider media applications, so users need faster transmission performance, to simplify the downloading, storage, and a large number of multimedia Content sharing. USB 3.0 to provide consumers with easy connectivity it needs played a crucial role. When the device when used in consumer, USB 3.0 will address not recognize USB2.0 devices without battery problems. Host to reduce the current through the USB 3.0 slow to recognize these devices, such as mobile phone battery has gone bad.
For the purposes of systems and ASIC developers, USB 3.0 chips and IP to ensure a wide range of practical requirements of each design can be met in a timely manner. The full range of support for standards such as USB 3.0 is particularly important because the speed, advanced protocol and a variety of cable length (from a few inches to several meters) makes the design and standards compliance as a challenge.
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