The difference between LED TV and LCD TV is there

Generally speaking, the backlight source used is different; LEDs have been widely used in small displays. For larger displays, this technology is beginning to be replaced by LED backlights due to their high power consumption and, in some cases, excessive mercury content. LEDs can be arranged in a dot matrix along the edge of the LCD or on the back of the LCD.

LED devices can be arranged in series or parallel, and the two structures will provide uniform LCD illumination. LED strings can be arranged in parallel using the series resistors in each string to provide string-to-string current equalization and lighting redundancy. LCD backlights typically provide white light, while LED backlights can provide both white light and a mix of red, green, and blue light.

LEDs emit light when they are positively biased. In order to ensure the display quality, a constant current driver is required to compensate for the effects of LED voltage drop and temperature changes to ensure stable light output. Unlike LCDs, LED backlights do not require a high AC voltage and therefore do not require an inverter.

The most basic LED drivers are powered by DC power from 5 to 48V and employ a DC-DC boost circuit to provide voltage to the constant current driver that drives the LED string.

Hello! LED is the English abbreviation of Light Emitting Diode. LED applications can be divided into two main categories:

One is LED single-tube applications, including backlight LEDs, infrared LEDs, etc.; In addition, LED display, at present, there is still a certain gap between China and the international in the manufacture of LED basic materials, but as far as LED display is concerned, China's design and production technology level is basically synchronized with the international. LED display is a display device composed of light-emitting diode arrangement. It is driven by a low voltage sweep and has:

Low power consumption, long service life, low cost, high brightness, less failure, large viewing angle, long viewing distance and other characteristics. The original text of LCD display is Liquid Crystal Displa

Compared with traditional displays, LCD is a liquid crystal display, with small size, long life, high pixels, fast response, and small auxiliary emission! But in terms of maintenance, the requirements are high, and the LED is a diode display, which is superior to the former.

Trouble, thanks!

1. Compared with LCD displays, LED displays have more advantages in terms of brightness, power consumption, viewing angle and refresh rate. With LED technology, it is possible to create displays that are thinner, brighter, and clearer than LCDs.

2. LED (lightemittingdiode), that is, light-emitting diode, is a semiconductor solid-state light-emitting device, which uses a solid-state semiconductor chip as a light-emitting material, when the forward voltage is added at both ends, the carriers in the semiconductor are recombined to cause photon emission and produce light. LEDs can directly emit red, yellow, blue, green, cyan, orange, violet, and white light.

Advantages of LED LCD TV: ultra-wide color gamut, which can reach 105% NTSE color gamut, so the color is more vivid; Ultra-thin appearance, the thinnest reaches centimeters, which is more fashionable; Energy saving and environmental protection, energy consumption is 52% lower than that of cold cathode backlight, and there is no mercury pollution of cold cathode tubes; It has a long service life of nearly 100,000 hours and can be used for 27 years if it is driven for 10 hours a day.

Disadvantages of LED LCD TV: The sense of hierarchy and dynamic performance are unsatisfactory; The sense of depth in the picture is not obvious.

3. LCD (LiquidCrystalDisplay), which is a display method that controls semiconductor light-emitting diodes, its general appearance is composed of many small lights, usually red, and the characters are displayed by the lights on and off.

Advantages of LCD TV: high display quality; There is no electromagnetic radiation; Wide range of applications; digital interface; Low power consumption.

Disadvantages of LCD TV: The viewing angle of LCD is relatively small compared to CRT display; In terms of display response speed, traditional displays have very good response speed due to technical advantages; The response time of the LCD is relatively long, so it does not perform well in moving images; The yield rate of its manufacturing is relatively low; Display quality: LCD can theoretically only display 18-bit color (about 262144 colors), but the color depth of CRT is almost infinite; LCD displays are fragile and susceptible to damage.

LED backlight LCD TV uses LED light-emitting diode as backlight, which has five major advantages over cold cathode fluorescent tube backlight:

1. Ultra-wide color gamut, which can reach 105% NTSE color gamut, so the color is more vivid.

Second, ultra-thin appearance, the thinnest reaches centimeters, which is more fashionable.

3. Energy saving and environmental protection, energy consumption is 52% lower than that of cold cathode backlight, and there is no mercury pollution of cold cathode tube.

Fourth, the life is long, reaching nearly 100,000 hours, and it can be used for 27 years if it is driven for 10 hours a day.

Fifth, it can reach 100,000:1 ultra-high contrast ratio, and the clarity is higher.

The above performance advantages determine that the LED backlight is technically a substitute for the cold cathode backlight, and the current market is basically 150% of the cold cathode backlight products. There is no choice for the LED backlight itself,The main choice of the whole machine is the choice of the technical performance parameters of the LCD panel,For example, maximum physical resolution、Dynamic response time, etc.,It is the same as an ordinary LCD TV。

LED TV, just replace the backlight with an LED backlight.

That's the case, there's no need to make a fuss, it's just that everyone is usually misled by the overwhelming publicity, it feels like LED is very good and powerful, in fact, the difference between LED and LCD is not big, but the LED backlight can be done without a lamp, so the product can be made very thin, and it looks more fashionable.

In addition, if you consider elimination, it is true, the traditional LCD will not be available in 2011, and will be replaced by LED;

But from the outside**,There may be no difference,So,If you want to buy a fashionable TV that hasn't been eliminated for a long time, just look at the appearance,Or you're rich.,You can buy a 3D or touch screen,It's already being done now.,It's going to be on the market soon。

At present, almost all of the LCD on the market still use non-active light-emitting LCD, and its backlight is divided into LED backlight and CCFL backlight (that is, fluorescent lamp).

LED backlight: power saving (30% 50% power saving compared to CCFL), high price, high brightness and saturation.

CCFL backlight: Compared to LED backlight, it consumes more power (or much more power-saving than CRT), and is cheaper.

There is no radiation in these 2 kinds, rest assured.

Picture differences: LED backlight colors are more vivid and saturation is high (CCFL and LED are not the same as natural light sources).

How to differentiate: The LED backlight will emphasize that it is LED TV, and what is not emphasized is CCFL LCD TV

OLED: Organic light-emitting diode.

AMOLED: Active matrix organic light-emitting diode.

There are still real LED TVs on the market (no backlight, it will actively emit light), Sony and Samgsung have them, but their panels are currently under 11", and **very expensive, like Sony 11" AMOLED TV asking price is about RMB 18000, which belongs to the high-end market, so there are almost no looks on the market.

That's right, it's all LCD screens.

So, what is the difference between LED backlight and fluorescent tube backlight For consumers, LED saves power, and there is no other basic difference, how can you tell that the LED TV that the merchant says is not LCD? It's hard to tell the eye from the outside! ）？

Merchants won't lie to you, they are all big companies, don't dare to smash their own signboards, which TV radiation is smaller?

Basically the same, both light sources have to drive the power supply, both meet the national standards, what is the difference between the two pictures?

There is basically no difference between using the same LCD screen.

OLED is a screen with the same principle as LED light-emitting, self-illuminating, and does not need backlight.

In the next few years, it will still be the leading role of LCD, and the large LCD screen is still in the stage of building a factory in China, as for the choice of backlight, you can calculate whether the price difference is enough to save electricity costs, the key is to choose a suitable size.

At present, the "new LED TV products" on the market are not really LED TVs, but the original CCFL (cold cathode fluorescent lamp) has been changed to LED (light-emitting diode) as a backlight, and in this way, a brighter and more energy-saving one is obtained. Longer life. The effect of making the body slimmer.

As for the difference you said,You can only distinguish whether you are using LED as a backlight,Because at present, the real LED home TV has not been sold on the market,To distinguish between LED backlight and CCFL backlight TV, you can draw conclusions by comparing the two TVs with the same picture。 LED backlight TV is relatively bright in brightness, contrast, and color gamut. The X-radiation of both is below and will not harm the human body.

OLED is an organic light-emitting diode (OLED) consisting of a thin, transparent indium-tin oxide with semiconductor properties, connected to the positive electrode of electricity, and a metal cathode to form a sandwich-like structure. Its performance should be lighter, more energy-efficient, thinner and lower cost.

First of all, what you say is true.

Only some large advertising screens are composed of LED light-emitting diodes.

The current so-called LED TV is an LCD TV that uses LED light-emitting diodes as a backlight.

And the so-called LCD TV is backlit with fluorescent tubes.

LEDs are light-emitting diodes, and LCDs are liquid crystals.

For us, there is no obvious difference between LED backlight and cold cathode, and it is another matter if it is not bad for money. The real LED TV is still under 7 inches as far as I know. It will be a few years before the big screen at home.

LCD - it means liquid crystal, so the landlord said that the two types of LCD TVs are LCD.

Now the so-called LED TV is to change the backlight behind the traditional LCD TV to LED light, the traditional backlight is called CCFL (fluorescent tube, that is, fluorescent lamp).

Therefore, the scientific correspondence of LED LCD TV should be called CCFL LCD TV.

Picture performance: LED is relatively bright, high contrast (a bit dazzling, it is recommended to adjust the brightness appropriately for a long time), but the light and black level performance are better;

CCFL is softer, and if the LCD panel is excellent, the effect is no worse than that of LEDs, and the cost is not lower than that of LEDs.

In general: LED has high luminous efficiency, more energy-saving and power-saving, and has gradually become a trend in the TV industry; But it can't be said that CCFL TVs are worse than LED picture performance.

LCD TV LCD and LED refer to the backlight of the LCD screen.

CCFL backlight is a kind of backlight for LCD TV: also called cold cathode backlight, which is the backlight of the cold cathode tube of ordinary LCD TV.

There is also a new type of backlight called LED backlight: it is a light source for light-emitting diode (LED) backlight.

Backlight, Power Consumption Life, Technology, Screen, Volume ** Different

1. The so-called LED TVs sold on the market today are actually LCD (liquid crystal) TVs that use LED (light-emitting diode) as the backlight.

2. Ordinary LCD (liquid crystal) TVs use CCFL (cold cathode fluorescent tube) as the backlight.

LEDs are more advanced,Better,Energy saving than CCFL,Wider color gamut,Higher brightness,Longer life,Direct-type LED TV can also realize local dynamic brightness adjustment (side-entry type can't do),Make the picture quality better,But **higher。

LCD is not CRT.

LCD is liquid crystal;

CRT is a cathode ray tube (picture tube).

The display screen in public places such as stadiums, railway stations, and airports is a real LED TV screen.

curtain, but because the area of a single pixel is too large, it is estimated that it will not be able to be used at home in a few decades, so buy this so-called LED now.

First of all, these two terms are not analogous!

LCD is short for Liquid Crystal Display!

LED is a type of LCD backlight, and there is also a common type of LCD backlight, called CCFL.

In other words, common LCD monitors or TVs are divided into two different types of backlight: LED and CCFL!

Between the LED backlight and the CCFL backlight, the LED is usually brighter and less power-consuming, and it is also higher!

However, the current mainstream LCD is basically LED backlight!

LCD TVs and LCD monitors are called LCD, the so-called LED is just a manufacturer to change the concept to fool the public, LED or LCD, but the backlight is changed from a cold cathode tube to an LED light-emitting diode, the brightness is higher, the life is longer, and the light leakage is small, but the display red will become worse, I hope to adopt.