You might want to check out the LED and OLED TV buying guide to understand the differences between OLED and LED TVs. Therefore, a back-lit LED TV with local dimming produces a better picture, which helps it to create an image comparable with other TV technologies like OLED. The main problem with older LCD TVs has always been the poor contrast ratio and limited color spectrum. This technique of switching off, or reducing, the back-light is called local dimming.ĭifferent parts of the screen can have the blocks of lights switched on or off at any time, which gives the TV a much better contrast ratio than a traditional LCD TV. You can get a completely black signal if a block of LEDs is switched off, which isn’t possible with fluorescent lamps. Each block can be switched on or off independently of the other blocks. With this type of TV, the LED lights are grouped into blocks. This type is usually called a full-array LED TV. Back-lit LED with Local Dimming (Full-Array) There are two main variations of this technique, back-lit with local dimming – and back-lit without any local dimming. It also allows a more even spread of light across the picture. There are several advantages to lighting the screen from behind – and the most important is more control over where the light occurs on the screen. So what is the difference between the two – and why should you care? What Is a Back-lit LED TV?īack-lit LED televisions have the lights arranged behind the screen – similar to a traditional LCD with a fluorescent lamp.
So, now you understand the basics, you can group these TVs into two types depending on how they are made: RGB LEDs allow a more accurate color reproduction than TVs made with white LEDs. Two different types of LEDs are used in making this type of television: Therefore, televisions are now being built using the same LCD screens – but with light-emitting diodes (LEDs) to create the back-light. The aim of using a different type of back-light is to fix some of these issues. But, there have always been disadvantages to this technology, such as poor contrast ratios and color reproduction. This type of lamp has managed to produce high-quality televisions. The traditional method of back-lighting an LCD TV uses a cold cathode fluorescent lamp (CCFL). An LED TV is essentially an LCD TV – but with a different type of back-lighting.
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