What Is an LED TV?

LED TVs are actually LCD TVs (Liquid Crystal Display), which is a type of LCD TV. It differs from traditional LCD TVs mainly in the use of different backlight sources, resulting in many differences in performance. As shown in the following table, LEDs The TV uses light-emitting diodes as the backlight source. It has more advantages in thickness, picture quality, life, energy saving and environmental protection than traditional LCD TVs with CCFL backlight, and has become the industry's recognized LCD TV development direction.

led tv

Many service personnel who sell LED TVs will give a description of "LED is more advanced and advanced than LCD and is a technology that replaces LCD", but it must be clear that all household LED TVs in the market are actually LCD TVs. One type, just the backlight source is different. The above statement has seriously changed the concept.

The small-pitch TV is a 0.9mm size TV product. The 0.8mm small-pitch TV is about to be developed. Small pitch TVs are mainly marketed in 2.5mm and 1.9mm products. The 0.9mm small-pitch TV has not yet been officially launched on the market. After the regular products such as 2.5mm and 1.9mm products are successively launched, according to market feedback, if the response is good, it will further expand the market to smaller-pitch TVs.

LCD TVs, which account for more than 70% of the flat-panel TV market, have clearly become the mainstream of the market!

To choose a good LCD TV, a good LCD screen is very important! Then, how to buy a cost-effective color TV is exactly what most consumers care about. Today, we understand the differences between hard screens and soft screens on the fundamentals. Is the hard screen promoted by shopping guides really good? Let consumers make their own decisions.

Simple distinction between hard screen and soft screen

LED-backlit TVs Since 2009, the concept of LED TVs has become popular. The latest LED TVs introduced by LG are only 6.9mm thick. Less than the thickness of a pencil makes people marvel at the advancement of technology. This credit should be attributed to the LED. To explain here, the LED TV mentioned in the media should actually be called LED backlight TV, because the backlight of ordinary LCD TV is

According to observations, the price difference between 46-inch LED TVs and CCFL models of the same size will be reduced from 2.2 times in 2007 to 1.2 times in 2010, and the 40-inch price difference will be reduced from 2.8 times in 2008 to 1.4 times in 2010. The reduction of the large size spread will be even larger, which is just in line with the domestic market's preference for large size LCD TVs. The increase in scale will further reduce the cost of LED backlights, and the speed of popularization will further accelerate. It is estimated that by 2013, the proportion of LED-backlit LCD TVs will reach 50%.

LED TVs in the domestic market saw a price reduction of more than 10% during the Yuanchun sales in 2010. Many investors worry that this general price drop will cause manufacturers' profit margins to fall. We don't think so, for two reasons: On the one hand, the price reduction is due to the reduction in cost, rather than a purely competitive strategy; on the other hand, although LED TVs have higher profit margins than CCFL-backlit TVs, the original The ratio is very low, and it does not contribute much to the overall profit. As its price starts to return to the average level that the market is willing to accept, the penetration rate will increase rapidly, its size will also rapidly expand, and its cost will be further reduced. Will be promoted. Therefore, we believe that the increase in the penetration rate of LED TVs due to the decline in unit prices will give LCD TV manufacturers a market opportunity to increase overall profits.

The large-scale investment in LEDs began in 2009 and can be divided into three periods: the first period was initiated by Korean manufacturers mainly Samsung; the second investment climax was the LED TV investment started by Taiwanese manufacturers in mid-2009 The climax; the third investment climax is the overall investment in the LED upstream and downstream industry chain in the mainland. The investment layout of chips and panels upstream of LED TVs in China has exploded rapidly.

Different positioning of LEDs by domestic manufacturers has led to differences in the timing and intensity of their LED layouts. Hisense, Skyworth, and Haier are relatively well-developed LEDs among local brands. Among them, Hisense began LED layouts in July 2008. It is the earliest local LED brand to design and develop LED backlights. Although the sales of LEDs in 2009 were small, the LED sales data monitored from the retail side can also see the differences in LED layout among brands. Among them, Hisense and Skyworth's LED sales closely followed LED's main promoter Samsung; TCL focused on the promotion of Internet TV, and began to promote some LED products in late 2009;

The strict name of the so-called LED TV is "LED backlight LCD TV", which refers to the LCD TV with LED as the backlight source. In the strict sense, LED TV refers to the TV that completely uses LED (light emitting diode) as the display device. That is, an ultra-high-density display application product with a TV function that uses an LED display design is unlimited in size. It replaces traditional fluorescent tubes with LED light sources. LED TVs have the advantages of better picture quality, longer theoretical life, more energy-saving, more environmentally friendly manufacturing process, and thinner LCD display panels. However, not all LED TVs have the above advantages. Consumers must turn on when buying. big eyes.

The most prominent advantages of the preferred LED TV are the clearer picture, wider color gamut coverage, and higher color reproduction. This is one of the main reasons why LED TVs are more expensive than ordinary LCD TVs. In addition, LED TVs only use LEDs as the backlight source can not necessarily make the picture quality better, must have good picture quality processing circuit and technology as the backing, otherwise there will be no picture quality improvement.

Consumers can let the shopping guides connect to the same signal source when purchasing, and it is best to watch it in high definition. If the resolution is similar, it is not even better than ordinary LCD TVs. Its name. In addition, consumers can ask the shopping guide to adjust the TV picture to a no-signal state or a blue screen state. If the four corners of the TV and the central part of the TV are found to have uneven brightness, or there is light leakage around the screen, this indicates that the manufacturer's LED TV technology is very poor Mature, the most basic picture quality circuit processing technology has not been done well, its LED TV quality is more conceivable.

Second, look at energy saving. The power consumption of LED TV should be lower than that of ordinary LCD TV. If the power consumption of LED cannot match that of ordinary LCD TV, consumers are better not to buy it easily.

Again, look at technology and configuration. One of the most important core technologies of LED TV is whether it can have backlight partition control. Having this technology can ensure that the TV performs better in picture quality, consumes less power, and has a longer service life. There are very few manufacturers with this technology. In addition, the key to the clarity and processing speed of the TV screen depends on the chip. The choice of LED depends on whether it has a 1 + 1 chipset and DOT restoration system. If the chip processing speed is slow or a single-line chip, it will cause the screen to be played. It is not smooth and cannot reach the point-to-point high-definition playback. The identification method is: adjust one of the parameters of the brightness and contrast in the menu under different signal sources, and you will find that the parameters of the two different signal sources are different. If they are the same, then the TV is a single chip. In addition, from the perspective of high-definition audio and video playback, whether LEDs can play high-definition video formats such as VC1, H264, high-definition audio DTS, and LPCM, which is also one of the important criteria for identifying the advantages and disadvantages of LED LCD TVs.

Then look at the brand. LED LCD TVs have only begun to develop in 2007. Industry insiders have told me that there are only 5 brands in the world that truly master LED core technology. The so-called LED TVs of most manufacturers are mostly foundry or hasty component production lines. The technology is seriously immature and there are many technical defects unknown to consumers. One of the characteristics of such manufacturers is that only a small number of one or two models of so-called LED TVs can be seen in the sales floor, which cannot cover the entire product size segment. Due to the immature technology, it cannot be applied to LED LCD TVs of all sizes. .

Relevant experts warn consumers that when purchasing an LED TV, they must focus on key aspects such as picture quality and sound quality. Do not be attracted by the manufacturer's extra product features or gifts, because we buy TVs, not functions other than TV products. And giveaways while wasting your money.

Shopping attention

1. See consistency, play white, red, green and blue, no mosaic.

2. Look at the heat dissipation, it must not be too hot.

3. Look at the refresh frequency, whether there are smearing and flickering.

4. Look at the contrast and black expression. In fact, many LCD TVs have more or less disadvantages in black expression, and

1. Avoid continuous, long-term work. When not watching TV, it is best to turn off the display or reduce its display brightness, otherwise the time will be long and it will easily lead to internal burnout or aging. In addition, displaying a fixed picture for a long time may cause some LCD pixels to overheat and cause internal burnout.

2. Keep the TV dry. TV sets have a high level of technology. Although they can work in humid environments, they can only be said to work as usual, but not normal. After all, moisture damages the TV set. Therefore, even if you do not watch TV for a long time, it is best to turn on the power regularly to let the heat generated by the monitor work to drive out the moisture in the machine.

3. Clean the screen properly. If the screen is dirty, it is best to use a professional cleaner. It is also possible to wipe gently with a soft cloth dampened with a little water, but do not overdo it. Water entering the LCD will cause a short circuit on the screen. If fog is found on the LCD, it should be gently wiped off with a soft cloth before turning on the power. If moisture has entered the LCD, it must be placed in a drier, warmer place to allow the water to evaporate.

4. Avoid hitting the screen. The truth is simple, but it is also important. The LCD screen is very fragile. Avoid strong shocks and vibrations.

5. Never disassemble the LCD yourself, even when the power is not connected. Because of the long shutdown, the CFL converter in the TV's backlight assembly may still have a high voltage of about 1,000 volts and an electric shock could occur. In addition, even if it is not powered down, the wrong operation may cause the display to temporarily or even stop working.