OLED TV
OLED TV is a new display technology that gives effective and clearer view of videos. OLED stands for Organic Light Emitting Diodes, the only difference between OLED and LED is the O for Organic, as OLED is made up of organic material that forms a thin film of layer, which emits light.
OLED uses the same technology as LED with an extra filming of several organic layers placed between two lucid electrodes. When electric charge is focused on these layers, a bright light is produced. With this technology, we can control the color and light patterns, as it allows addressing each pixel separately giving a desired picture quality. Placing an organic film and processing it, is called Electrophosphorescence. This process is used by creatures in the sea for getting a clear view of their targets. The display does not require backlighting and can run on 2 to 10 volts of current. You can view angle of 170 degrees with flexible displays.
You can produce OLED in two ways. First is the passive matrix, which allows you to select rows and columns for energizing thereby allowing the pixel at the intersection to emit light. Second option is design OLEDs that have active matrix mode. Individual LED is brought out at the display edge and respective individual transistor along with TFT technology is used. TFT stands for Thin Film Transistor. As you can switch on or off each LED independently, it creates quick response time and good control over contrast and luminance levels.
OLED technology is ideal for using with HDTV. OLED TV is brighter, as it uses active matrix mode and reacts faster against changes, so it is preferable in displaying full motion video. It is lightweight and assures durability. As it does not require backlight, power consumption is low. As the display is thin and use of polymer makes OLED flexible, no rigid substance is required for making OLED screen flexible to be rolled like a paper. As OLED produces its own light, the off axis view problem, which is common in LCD is eliminated. Once the light production initiates, display process becomes easier.
It has an impressive contrast ratio of 1,000,000:1. It allows a clear view of dark scenes by converting pixels into black hues. OLED is able to produce display with intense brightness using micro-cavity technique that can reproduce up to 105% color space of NTSC. This gives a livelier impression of images. It provides high resolution of 960 x 540 even for smaller models. As it is made up of organic material, it is user friendly.
While OLED TV is expanding in a global arena, it lacks certain features such as:
- Though, OLED have long lifetime for red and green LEDs, approximately 10,000 to 40,000 hours they do not guarantee blue LEDs with lifetime above 3,000 to 5,000 hours and thereby limiting entire screen’s lifetime.
- OLED matrix can be damaged by water. Even your slight spill of soft drinks can spoil display screen.
- The production process of this technology is quite expensive. Even smaller sized models are way too expensive. The cost will decrease though when technology progresses.
- Another problem with OLED TV is the size of screen. Even though large size models are been introduced in the market, stock for 12 inches TV is more.
OLED TVs can be as thin as any wallpaper that can be an attractive feature. It will be an exciting experience to buy OLED TVs within affordable range, which will soon be a reality. OLED technology can also be used in other applications to reap its various benefits.
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