Sunday, September 25, 2011

the fad re: LED TVs

Before, LED became the fad for flashlights, light bulbs, etc. Salesmen in hardware stores would explain that LEDs consume less electricity than normal incandescent light bulbs and have a longer lifetime.

Now i see tvs for sale sporting "LED technology." So how does LED technology improve television anyway?

LED Technology in televisions are just LCD TVs using LEDs to illuminate the display.[1] The back of the screen is lit up using Light Emitting Diodes (LED) instead of Cold Cathode Fluorescent Lamp (CCFL) used in the older LCD TV models[2].

Most advertised “LED TVs” only have LED backlight, and still use LCD (Liquid Crystal Display) technology.[3] True LED display TV. Displays such as OLED (Organic Light Emitting Diode) will self illuminate, utilizing an internal thin layer of LED for its display only.[4]

It results in improvements such as:  since LED consumes less power than conventional fluorescent lamps, it translates to savings in electricity bills (upto 35% less consumption[5]); since LED consumes less space provisions, tv using LED light can be made ultra thin compared to older LCD models; and LEDs provides a higher contrast ratio because of their ability to produce a more varied range of colors[6].

There are downsides still however, such as: the downsides attributed to LCD tvs before still exist, in comparison to Plasma TVs, the display of LED lit LCD TVs is still limited by viewing angles[7]; and LED lit TVs are prone to the poor uniformity of backlighting and as well as blooming effects when local dimming is employed.

No technology is perfect, besides, there’s still laser tv, 3D tv, HDTV, etc.  Well, at least I learned something new today.

Blog No. 14


[2] Id.

[3] Will Caulderwood. LED TV – Don’t Be Fooled, Understand the Technology First. Source: http://ezinearticles.com/?LED-TV---Dont-Be-Fooled,-Understand-the-Technology-First&id=2614235

[4] Id.

[5] LED TV Technology. Source: http://www.ledtvtechnology.info/

[6] Will Caulderwood. LED TV – Don’t Be Fooled, Understand the Technology First. Source: http://ezinearticles.com/?LED-TV---Dont-Be-Fooled,-Understand-the-Technology-First&id=2614235

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