TV, what does LED mean

At present, there have been a number of products called LED TVs in the domestic market, such as Samsung, Sony, Hisense, etc. Compared with ordinary LCD TVs of the same size, LED TVs are staggeringly expensive - two or even five times higher. In this regard,Industry insiders said,At present, the TV with the name of LED TV on the market is not a real LED TV,It's just an LCD TV with LED backlight,In essence, it's still an LCD TV。

According to industry insiders, the use of LED as the backlight of LCD TVs has improved some of the performance of existing LCD TVs to a certain extent. However, all the LED TVs seen on the market are implemented through this improvement, which is more suitable to be called LED-lit LCD. The imaging principle, working status and most of the parts used in LED-LIT LCD are no different from ordinary LCD TVs.

Liquid crystal display uses the principle of passive light emitting technology, so liquid crystal needs a backlight system to provide a light source. At present, the backlight used in LCD TVs is mainly divided into three types: CCFL (cold cathode fluorescence), LED (light-emitting diode) and HCFL (hot cathode fluorescence). Among them, CCFL is the most widely used, HCFL has just started, and the technology is still quite immature.

Due to the lack of congenital technology, CCFL backlights have shortcomings such as narrow color gamut, low energy utilization, high power consumption and short lifespan. And the use of LED as the backlight of LCD TV,The main purpose is to improve the picture quality,Especially in color saturation,LED backlight display can obtain a wide enough color gamut,Make up for the defect of insufficient color number of LCD TV display,Make it can meet or even exceed the requirements of Adobe RGB and NTSC color standards,Can reach NTSC color gamut coverage rate of more than 100%. As an alternative to CCFL backlight, LED backlight is an important R&D direction of major manufacturers in the future, and the CCFL backlight is basically the same in structure, the main difference is that LED is a point light source, and CCFL is a line light source.

The so-called LED refers to light emitting diode, which is what we often call light-emitting diode. At present, LED backlight materials are mainly divided into two types: white LED backlight and RGB-LED backlight. Because white is a mixed color, there is no identifiable wavelength value, so white LED will have the problem of color deviation, and RGB-LED with red, green, blue LED composition of light-emitting unit, can independently control the light source, to achieve the effect of full color, so as to achieve more accurate color reproduction, show better picture quality effect.

LED backlight TV is regarded as an upgraded product of a new generation of LCD TV, due to the advantages of light and thin texture, bright color, energy saving and power saving, or it will become a TV product that can effectively extend the vitality of the LCD era and lead the new generation of flat panel TV market; Due to the high cost of OLED TV products and the inability to produce large sizes, LED backlight LCD TVs have more advantages. In addition, due to the particularity of the luminous principle of LED LCD TV products, the standby power and power consumption of the whole machine are greatly reduced compared with LCD TV products of the same size, which is more energy-saving. Since 2003, Sony launched the first LED backlight LCD TV product - QUALIA has attracted strong attention in the field of flat-panel TV manufacturing, and has also stimulated many flat-panel TV manufacturers to develop enthusiasm for LED LCD TV products.

In the following years, Sharp, Samsung and other companies have promoted their LED LCD TV products in various exhibitions, and the LED LCD TV market has initially germinated. And China's own brand Hisense in July 2008, launched the first domestic LED backlight LCD TV, becoming the first enterprise to mass-produce LED LCD TV products.

LED TVIt is the hottest product in the TV market at present,Many consumers don't see it but hear it,SoWhat is LED TV？What about LED TVs? Below we will make a de-nuclear dismantling answer for you one by one, hoping to provide you with help.

LED TV is actually LCD TV (LiquidCrystalDisplay), that is, a kind of LCD TV, it is different from the traditional LCD TV mainly in that it uses different backlights, which brings many differences in performance, as shown in the following table, LED TV uses light-emitting diodes as the backlight, which is more advantageous than the traditional LCD TV with CCFL backlight in thickness, picture quality, life, energy saving and environmental protection, and has become a recognized development direction of LCD TV in the industry.

What about LED TVs?

1. The body is ultra-thin.

The thickness of traditional LCD TVs is usually about 10cm, and the backlight method of LED is more common in laptops, and it is applied to TVs, making a thin leap in the thickness of the fuselage.

2. Environmental protection and energy saving.

In the backlight used in traditional LCD TVs, the CCFL cold cathode cha fluorescent lamp, contains mercury that is harmful to the human body. Although manufacturers are looking for ways to reduce the amount of mercury in fluorescent tubes, completely mercury-free fluorescent tubes pose some new technical problems. The LED backlight does not contain mercury, which is in line with the fashion of green environmental protection.

The virtual celery LED backlight is also very power-saving. The internal driving voltage of the LED is much lower than that of the CCFL, and the power consumption and safety are better than that of the CCFL.

3. Long life.

Different CCFLs have a rated service life (half-bright) between 8,000 and 100,000 hours. CCFL backlights with an improved design for enhanced performance will last a little longer. The LED backlight can reach about twice that of the CCFL.

Therefore, the lifespan of LED backlights is usually a little longer than that of CCFL.

4. Wide color gamut.

According to the different luminous colors, LEDs can be divided into white LED backlight and RGB-LED backlight. The advantage of white LED technology is mainly the low power consumption, while the advantage of RGB-LED backlight is excellent color expression. RGB-LED backlights achieve a wide color gamut that cannot be achieved by conventional CCFL light sources through LED devices that emit high-purity red, green, and blue light.

The mainstream RGB-LED backlight can reach 105% of the NTSC color gamut range, and the more powerful LED devices can achieve more than 120% of the NTSC color gamut range.

The above is for you, what is LED TV? What about LED TVs? All of it.

TV is an indispensable entertainment appliance in our daily life,In recent years,LED TV has gradually appeared in the public's field of vision,Many people will also choose to buy LED TV。 So many friends don't know much about what LED TV is,Let's follow along to find out!

What is LED TV

At present, the strict name of LED TV usually referred to in the home appliance industry in Chinese mainland is "LED backlight LCD TV", which refers to LCD TV with LED as the backlight, which is still a kind of LCD. It replaces the traditional fluorescent tube with LED light source, which has a better picture, longer theoretical life, more environmentally friendly manufacturing process, and can make the LCD panel thinner.

With the development of technology, brighter and more colorful LEDs have been manufactured, and LEDs have also begun to be used in TV imaging technology. LEDs are about the size of mung beans, so they were first used to make large screens. Because the large screen allows the audience to be far away, it is only necessary to gather a large number of LEDs together to make a large screen.

Although the individual LED tubes embedded in the screen can be clearly seen next to such a screen, the picture will feel more detailed when viewed from a distance. This large screen is an LED TV in the true sense of the word.

In order to improve the picture quality of LCD TVs, TV manufacturers began to use LEDs as the backlight of LCD TVs. Compared to traditional LCD TVs that use fluorescent tubes as backlights, LED LCD TVs can display more realistic colors. In addition to the color saturation increase, the dynamic adjustment of the picture can make the brightness and contrast can be dynamically corrected when displaying different images to achieve better image quality.

1. LED TV.

LED TVs are TVs that use LEDs for direct imaging. In principle, the light source behind the liquid crystal display device is evenly irradiated on the transparent film with the picture after a certain diffusion, so as to transmit the picture, and the liquid crystal panel is like that layer of film.

Traditional liquid crystal display devices use CCFLS (cold cathode fluorescent lamp) as the light source, and the lamp tube is very thin. A lot of objects have weird colors under fluorescent lamps because the light it emits is not true daylight.

One of the reasons why it has been difficult for professional users to truly satisfy the image display of liquid crystal displays is that the color of the light source is not accurate enough, and the image generated after passing through the liquid crystal panel is congenitally insufficient, resulting in color reproduction deviation.

2. LCD movies.

Liquid crystal display (LCD) is a liquid crystal display (LCD) that uses a substance between a solid state and a liquid state, an organic compound with a regular molecular arrangement, which is heated to present a transparent liquid state, and a cloudy solid state of crystalline particles after cooling.

The molecular structure of the liquid crystal used for liquid crystal displays is similar to that of a thin matchstick, and it is called Nematic liquid crystal, and liquid crystal displays made of this type of liquid crystal are also called liquid crystal displays (LCDs).

The LCD TV is in the liquid crystal between two glasses, add voltage, through the molecular arrangement changes and zigzag changes to reproduce the picture, the screen through the collision of electrons, create a picture, and form a picture through the perspective reflection of external light.

LCD TV LED refers to LCD TV that uses an LED module as a backlight.

Compared with ordinary CCFL backlit LCD TVs, LCD TV LEDs have the advantages of thinner thickness, more uniform brightness, smaller heat generation, more energy saving, and longer life.

LCD TV, also known as liquid crystal display and LCD, uses a substance between solid and liquid states, organic compounds with regular molecular arrangement, heated to present a transparent liquid state, and a turbid solid state of crystalline particles after cooling. The world's first liquid crystal display device was manufactured by Sharp in Japan in the early 70s of the 20th century, and was called TN-LCD liquid crystal display.

LED is the meaning of light-emitting diode, that is, LED is used as the backlight of LCD TV, and the previous LCD TV was the backlight made of LCD tubes. The advantage of LED is that it is energy-saving, and it can emit pure white light to improve the brightness of the TV, making the effect of the TV better!

LEDs are the most energy-efficient and environmentally friendly materials available today.

This is the specification model of the product,If I'm not mistaken,You bought a Haier LCD TV,But I don't know how big it is,Because I'm a Haier appliance monopoly,Hehe。