Oled tv - Ledihatv

Oled tv

Oled tv

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OLED stands for organic light-emitting diode and is one of the newer technologies available for TVs and other digital displays. OLED is what technology professionals call an “emissive” technology because it uses millions of pixels that emit their own light rather than relying on a separate backlight.

The Cons of OLED TVs
  • OLED TVs Have Average Brightness Levels. …
  • OLED TVs Are Susceptible to Burn-Ins. …
  • OLED TVs Can’t Match QLEDs in Color Volume. …
  • OLEDs Pale in Comparison to MicroLED Technology.
  • LG OLED‑C9

    Sony

    Samsung

    Hisense

    TCL

    Panasonic

    OLED TV is a television display technology based on the characteristics of organic light-emitting diodes (OLED). OLED TV is a different technology than LED TV.

    The OLED display is based an organic substance used as the semiconductor material in light-emitting diodes (LEDs). The display is created by sandwiching organic thin films between two conductors. When an electrical current is applied to this structure, it emits a bright light. Because OLED displays don’t require backlighting, they can be thinner and weigh less than other display technologies. OLED displays also have a wide viewing angle — up to 160 degrees even in bright light — and use only two to ten volts to operate.

    OLED stands for organic light-emitting diode and is one of the newer technologies available for TVs and other digital displays. OLED is what technology professionals call an “emissive” technology because it uses millions of pixels that emit their own light rather than relying on a separate backlight.

    Like all types of OLED, phosphorescent OLEDs emit light due to the electroluminescence of an organic semiconductor layer in an electric current. Electrons and holes are injected into the organic layer at the electrodes and form excitons, a bound state of the electron and hole.

    Electrons and holes are both fermions with half integer spin. An exciton is formed by the coulombic attraction between the electron and the hole, and it may either be in a singlet state or a triplet state, depending on the spin states of these two bound species. Statistically, there is a 25% probability of forming a singlet state and 75% probability of forming a triplet state.[2][3] Decay of the excitons results in the production of light through spontaneous emission.

    Applications

    In OLEDs using fluorescent organic molecules only, the decay of triplet excitons is quantum mechanically forbidden by selection rules, meaning that the lifetime of triplet excitons is long and phosphorescence is not readily observed. Hence it would be expected that in fluorescent OLEDs only the formation of singlet excitons results in the emission of useful radiation, placing a theoretical limit on the internal quantum efficiency (the percentage of excitons formed that result in emission of a photon) of 25%.[4]

    However, phosphorescent OLEDs generate light from both triplet and singlet excitons, allowing the internal quantum efficiency of such devices to reach nearly 100%.[5]

    Oled tv

    This is commonly achieved by doping a host molecule with an organometallic complex. These contain a heavy metal atom at the centre of the molecule, for example platinum[6] or iridium, of which the green emitting complex Ir(mppy)3 is just one of many examples.[1] The large spin–orbit interaction experienced by the molecule due to this heavy metal atom facilitates intersystem crossing, a process which mixes the singlet and triplet character of excited states. This reduces the lifetime of the triplet state,[7][8] therefore phosphorescence is readily observed.

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