LED TV PK LCD TV

Previously only flat-panel TV LCD TV and plasma TV two, but in this case this year become more complicated, the major manufacturers invariably seem to start a promotion called "LED TV" products, the LCD TV, plasma TV and LED TV three products on the market, consumers do not know what to choose. So what exactly is LED TV? And LCD TV in the end what is good or bad? This article may be able to answer the answer.

Imaging principle analysis

In 1888, Austria botanists discovered the liquid crystal molecules, but it was not until the United States in 1968 to make LCD products, and did not put into practice. In 1972 SHARP launched the world's first liquid crystal electronic calculator, after the introduction of a special industry for liquid crystal display devices, marking the formal entry into the LCD display. In 1996, the Sony Corp made the first LCD tv.

Schematic diagram of LCD TV imaging

The imaging principle of the LCD TV is added to the liquid crystal molecules in between two pieces of glass substrate, conducting voltage after the molecular arrangement occurred in the twists and turns, the screen through electronic group collision, make the picture and form the screen through external light reflection perspective. The LCD panel itself is not luminous, so it is necessary to add backlight to the LCD panel to provide the brightness of the image. LCD LCD TV is the use of CCFL backlight, relying on condensing backlight to light.

LED LED

LED TV sounds profound, is actually a LCD TV, only CCFL LCD TV backlight lamp in light emitting diode is more stable, the main advantage is the luminous uniformity, better color, energy saving and environmental protection, longer life. RGB-LED helps to enhance the LCD TV color gamut, up to 105%. Quality, thickness, power consumption, environmental protection competition

Quality competition

The advantage of liquid crystal display is mainly reflected in: the picture is more delicate than all previous display devices, and the resolution is easier to improve. Liquid crystal is relatively stable, the screen life can reach 60000 hours. There will not be a picture of the gas produced by the flicker problem, a substantial reduction in power consumption, in addition to electromagnetic waves can achieve zero radiation. LCD TV also has its limitations, liquid crystal rotation and light shielding needs a certain response time, the LCD screen when playing fast LCD TV is not as clear as CRT and plasma tv.

LED TV display effect

CCFL LCD TV display effect

In the test of LED TV is three RGB-LED backlit TV, can be clearly seen in the sharpness, contrast, color reduction can be said to win CCFL TV, LED TV display the basic picture color has been restored.

Appearance thickness competition

LED TV (left) and CCFL LCD TV thickness contrast

LED TV used in light emitting diode than condensing CCFL backlight LCD TV in size is much smaller, so the appearance of LED TV's thickness thin, even the thinnest CCFL LCD TV, more than 3 cm in thickness, but Samsung LED TV in all of the easy built-in interface up to 2.99 cm, the SONY LED TV is only 0.99 centimeters, but the external interface equipment.

Power consumption competition

LED TV power consumption test

CCFL LCD TV power consumption test

The test results show that LED TV in terms of energy is indeed better than the CCFL backlight LCD TV, about 100 watts of power difference. This is because the LED backlight can automatically adjust the brightness and brightness of the opening and closing, while the CCFL lamp can only be passive for a long time to light up, naturally some power consumption.

Environmental protection competition

CCFL backlight lamp routine must add mercury in the manufacturing of mercury is highly toxic substances, as everyone knows, although not in use in the process of handling volatile, once the collision makes light damage, injury to people and the environment pollution is quite large, but also in the TV "scrap" after the recovery is a very troublesome what. LED through the semiconductor light-emitting, the environment and the negative impact of natural resources to save a lot of small.

Write in the end:

Judging from the results of the evaluation, LED TV in terms of quality, appearance, energy saving, environmental protection and other aspects of victory over CCFL LCD TV, which coincides with the manufacturer's propaganda, that is, LED TV will be a substitute for CCFL LCD tv. But LED is not a panacea, there is no obvious advantage in terms of response time compared with CCFL, and the current high price of LED TV, the average consumer is not easy to accept.