Video and Audio Center Blog



Thursday, July 2, 2015

WHAT MAKES LG’s OLED TVs SO SPECIAL



Organic LED TVs (OLED) arent like conventional LED TVs: unlike the electroluminescence brought into being by conventional LCD technology, OLED uses thin, light-emitting films instead of an array of LED bulbs. An immediate result is a bright light using less energy, but theres much more going on than that.  LG is well aware of this and their line of OLED TVs take every advantage of what can be offered. To gain a better understanding, we turn to Tim Alessi, director of new product development for home entertainment at LG Electronics USA.


Why is color more vibrant and realistic when an OLED TV is involved?

Tim Alessi: Unlike LCD and LED TVs, OLED TV can achieve perfect black levels and from perfect black, comes incredible color. With its unique revolutionary technology, OLED delivers infinite contrast and shadow detail and enables the production of truer, more lifelike colors and crisper images. OLED TVs are naturally able to create an expanded color gamut beyond the standard HDTV color space, making it ready for new generations of content which are likely to be mastered with wider color.  It also means the user can choose to dial up the color now to suit their own personal taste.


Why is black so important to having a superior image on a TV display?

Tim Alessi: According to the Imaging Science Foundation (ISF), one of the foremost picture quality authorities, black level and contrast are the most important features topping the picture quality hierarchy, followed by the ability to produce many colors, color accuracy and resolution.

Because OLED is an emissive substance, each pixel can turn on or completely off, creating perfect blacks and infinite contrast because there is no light leakage like what happens with LCD technology and from perfect blacks comes incredible color.  Also, since pixels can be individually controlled, there is no halo effect between dark and bright areas, such as a bright moon in a dark sky.  Even LCDs with local dimming cannot eliminate this halo effect.


What is HDR (high dynamic range) as it impacts a TV for consumers to look at and then, how does the OLED take advantage of it for improving the image?

Tim Alessi: HDR means High Dynamic Range and is another way of expressing contrast. The range from the brightest bright area to the darkest dark area of a scene.  LG OLED technology delivers perfect, absolute black and can control the dark and bright areas very precisely.  This is because OLED is an emissive substance, meaning it makes its own light and each pixel can turn on or completely off, creating perfect blacks and infinite contrast with precise control over the picture. By starting from perfect black, OLED is able to produce the required dynamic range with a lower peak brightness, resulting in an exceptional and comfortable HDR viewing experience.

Are there any other advantages to an OLED TV that should be considered?

Tim Alessi: LG OLED technology provides the further advantage of excellent picture quality from almost any viewing angle, whereas with most LED LCD TVs, a person who is only 20 degrees off center will experience dramatically degraded contrast and color accuracy which doesnt deliver a true HDR experience. This is important because we know that consumers rarely sit directly in front of their TVs at home, especially when viewing with others.


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