how is the classification of current TV products in the market ?
TV is classified in to LCD TV , LED TV (It is actully belongs to LCD TV), OLED TV and QuantumTV.
LCD TV, use traditional ordinary fluorescent tube as backlight together with LCD front screen.
LED TV, use light emitting diode as back light together with LCD front screen. so technically speaking , LED tv is belongs to LCD TV, but of course , it have a lot of advantages. LED TV dominated the tv market right now. It occupies about 70% of the market share.
OLED TV, is a new generation TV, every pirxel in the screen can glow and display alone, not like LED tv which use a backlight grids to display together. But it is very expensive right nw, normally 10 times expensive than LED tv.
QuantumTV : television is 2015 has just launched the television technology, quantum dot TV can be said to be a new generation of technology to replace LED TV, instead of the LED backlight screen, the color performance can have and OLED TV to match, the color is very helpful for quality improvement. Quantum dot technology is a new technology in the television industry, but at present the domestic brands to follow up relatively quickly, the higher requirements can be concerned with this technology on the quality of TV products, with 4K Ultra HD resolution, can enhance the synchronization in the details of the performance and the color performance.
The different between LED TV and LCD TV ?
LED TV is TV LCD (Liquid Crystal Display), which is a kind of LCD TV, LCD TV and traditional is different is the use of the backlight is different, resulting in the performance of many different, as shown in the following table, LED TV using light emitting diode as a backlight, CCFL backlight than traditional LCD TV in thickness, picture quality, service life, energy saving and environmental protection more advantages, LCD has become the development direction of TV industry recognized.
In strict sense, LED TV is a TV set that uses LED (LED) as a display device. It is generally used in low precision display or outdoor large screen. At present, the strict name of LED TV in Chinese household appliance industry is “LED backlight liquid crystal TV”, which refers to LCD TV with LED as backlight source, and it is still a kind of LCD. It uses the LED light source instead of the traditional fluorescent tube, the picture is better, the theoretical life is longer, the production process is more environmentally friendly, and can make the LCD panel thinner.
LCD Liquid Crystal Display liquid crystal display is referred to as the structure of the LCD is placed in the liquid of two pieces of parallel glass crystal, fine wire and many vertical and horizontal between two pieces of glass, through the power to control the rod crystal molecules change the direction of light rays are refracted out screen.
LED is English light emitting diode (light emitting diode) abbreviation, its basic structure is an electroluminescentsemiconductor materials, placed on a wire rack, then sealed with epoxy resin around, to protect the internal core function, so the seismic energy LED.
The difference between LED liquid crystal and ordinary liquid crystal is that the light source of backlight is different. It is said that the life of LED is much longer than that of ordinary fluorescent tube, and the brightness is even more, and the price is much more expensive. Compared to the common cold cathode fluorescent backlight TFT-LCD LCD, LED backlight has some benefits
THE merits of Led tv ?
1, the backlight uniformity is better, will not appear black uneven situation
2, better contrast, LED can be closed in the black screen backlight, so as to achieve dynamic contrast better
3, color performance is better, because you can use three primary color LED backlight, color temperature can be effectively controlled, so as to obtain more realistic color and wider color gamut
4, because led uses low voltage drive, so the cold cathode backlight boost circuit is omitted, and it can be made thinner.
5, if the use of dynamic LED backlight, (the principle is to use 2 images of a driver, the LCD driver, the other with a large outdoor LED screen display wall led driver, driving the resolution without too high), LED backlight 47 inch LCD TV can achieve dynamic power consumption, lowest power consumption can be the maximum brightness is 10 watts, 200 watts or less, and the contrast can be more than 100000:1, the brightness can reach 1000 nits, then the PDP 132%NTSC color gamut, far behind (in addition to the response speed is slightly inferior).
The difference between LED and LCD TV: only the principle of backlight is different. LCD uses a tube, and LED uses a light emitting diode. The use of LED is better.
LED backlight liquid crystal TV adopts LED light emitting diode as backlight, which has five advantages over the cold cathode fluorescent tube backlight:
First, ultra wide color gamut, 105%NTSE color gamut can be reached, so the color is more colorful.
Two, ultra-thin appearance, thinnest to 1.99 centimeters, more fashionable.
Three, energy saving and environmental protection, energy consumption is 52% lower than cold cathode backlight, and there is no mercury contamination of cold cathode tube.
Four, long life, reaching nearly 100 thousand hours, 10 hours per day, you can use for 27 years.
Five, can achieve 100000:1 ultra high contrast, higher clarity.
The above advantages determine that the LED backlight is technically an alternative to the cold cathode backlight, and the market price is basically 150% of the cold cathode backlight product. LED backlight itself has no choice, the main choice of the whole machine or the choice of technical parameters of the LCD panel, such as the maximum physical resolution, dynamic response time, and ordinary LCD TV is the same.
LED TV contains two kinds, Straight down backlight LED, side entry backlight LED.
Straight down: emphasis on quality, excellent performance
The enterprises adopting the direct LED technology think that the advantage of the direct LED technology in the picture control is better than the side entry LED technology, and the price of the side entry LED TV is too high. Compared to the two ways, “straight down” is more perfect for the picture quality.” Take 55 inch LED TV as an example, the straight down product evenly distributes more than 3000 LED lights behind the panel, so that the backlight can be evenly transmitted to the entire screen, and the details of the picture are more delicate and realistic. The side entry is to install more than 400 LED lights at the bezel of the panel, so that the light source shines out of the side. Although it can reduce the thickness to the maximum, but because it reduces the number of LED lamps nearly 7 times, it is easy to reduce the brightness of the picture in the form of “X” (that is, the circumference is brighter than the central position).
In addition, the direct LED TV also divides the LED backlight into several cells. When the black color is displayed, the light of the corresponding LED area is turned off directly, and the black color can be displayed perfectly. Therefore, the enterprises adopting the straight down LED technology believe that the straight down LED backlight can more accurately display the image, and show excellent color and brightness contrast effect.
Side entry: emphasis on ultra-thin energy-saving leading
Compared with the direct down backlight technology, the side in back backlight technology has higher requirements for the overall system design and integration ability of the enterprise. In addition, from the manufacturing cost point of view, the use of side into the white LED technology to consider the whole machine (host power, circuit, screen power and heat dissipation, etc.) thinner needs, often cause a variety of cost increases, so the whole cost is higher than the direct white LED products.” Samsung TV technicians make such an explanation for the inflated prices.
Become more slim volume of edge LED TV’s biggest bright spot. According to the reporter, the current market side of the thinnest LED TV product thickness is only 2.99cm, while the straight LED thinnest product thickness of 5.5cm.
strqight down led light led tv is thicker than side entry led tv. But traight down led tv image quality is better than side entry led tv.
The future of tv industry.
Quantum dot quantum dot TV: television is 2015 has just launched the television technology, quantum dot TV can be said to be a new generation of technology to replace LED TV, instead of the LED backlight screen, the color performance can have and OLED TV to match, the color is very helpful for quality improvement. Quantum dot technology is a new technology in the television industry, but at present the domestic brands to follow up relatively quickly, the higher requirements can be concerned with this technology on the quality of TV products, with 4K Ultra HD resolution, can enhance the synchronization in the details of the performance and the color performance.