Tim
thanksgiving day sale at walmart has a cheap led hdtv that i like, i have only had lcd hdtvs is there much a difference between the two someone explain the pros n cons of an led hdtv compared to an lcd or plasma hdtv or pros and cons of led itself
Answer
- I recommend Panasonic Plasma OR I recommend Samsung LED (better and/or expensive LED may not have the problems stated below because of additional technologies going into them). - http://reviews.cnet.com/best-tvs-picture-quality/
- Input lag for gamers: HD-TV may have more input lag if there is more processing going and how well the TV can process it. Example 1: Most PS3 or Xbox 360 video games are 720p, it would take processing power to upscale it to 1080p for a 1080p HD-TV (unless PS4 or Xbox one video games are 1080p it would be a good idea to get a 1080p HD-TV). Example 2: Interpolation and refresh rates can cause more processing too.ect = Gamer mode can turn off these processes to get less input lag.
- HD-TV viewing distance calculations: http://isthisretina.com/ OR http://www.thx.com/consumer/home-entertainment/home-theater/hdtv-set-up/ OR http://www.sony-asia.com/support/faq/47537 OR http://en.wikipedia.org/wiki/Optimum_HDTV_viewing_distance
- I am not going to talk about HD-TV features like 3D or smart HD-TV. Im not going to talk about projectors. Im not going to talk about the new OLED (RGB or W) HD-TV's.
- A plasma HD-TV is sometimes called an emissive display, the panel is actually self-lighting for each pixel. The display consists of two transparent glass panels with a thin layer of pixels sandwiched in between. Each pixel is composed of three gas-filled cells or sub-pixels (one each for red, green and blue). A grid of tiny electrodes applies an electric current to the individual cells, causing the gas (a mix of neon and xenon) in the cells to ionize. This ionized gas (plasma) emits high-frequency UV rays, which stimulate the cells' phosphors, causing them to glow the desired color.
= Better contrast = Plasma's have better black levels, but worse white levels. Plasma's are a emissive display which means better brightness accuracy and better color accuracy.
= Better viewing angles = Plasma is a emissive display, it has little/no picture problems when viewed of axis (not directly in front of screen).
= Better for dark-lit rooms, but worse for bright-lit rooms = Plasma's can have screen glare and less contrast and less brightness and faded colors in bright-lit rooms, but they have little/none of these problems in dark-lit rooms. Better and/or expensive Plasma's may use less reflective glass.
= Better response times = Plasma's florescent phosphor coating in each subpixel stops glowing just a few nanoseconds after the electrode turns off (on and off) which means less lag and less ghosting.ect
= Better refresh rates = Plasma's better response times bundled with it's sub-feild drives or focused-feild drives take each of a it's pixel's sub-pixels and flashes it a number of times to create a image, the way Plasma works has little motion blur with sub-feild drives or little/no motion blur (and better brightness control, color quality, contrast.ect) with focused-feild drives. (Plasma can use interpolation for judder too).
= Worse screen size options, and worse weight (thicker), and worse manufacturer choices = Plasma is a emissive display which makes it hard to make a Plasma screen size smaller than 40 inches for HD-TV and you may not find them larger than 70 inches for HD-TV because the power consumption will sky rocket. Plasma's tend to about 10-20 pounds heavier too and are thicker but that can provide better audio quality tho. Main brand Plasma maker is Panasonic or Samsung or LG.
= Worse power consumption, and worse life span, but better burn in, but worse high altitudes = A plasma can cost on average around $50 a year more. A Plasma can easily last 10 years and much more. Newer Plasma's have burn in technologies that make really hard or not possible to have permanent burn in, but there sill a chance you could get temporary burn in (even tho it's harder to do now). Plasma may not work in really high altitudes and if it does the TV would create a buzzing sound.
= Price = Plasma is more expensive to buy than LCD, but Plasma is less expensive to buy than LED. Plasma does not cost that much to make.
- An LCD HD-TV is sometimes referred to as a transmissive display, the panel has sections of lighting for a section of pixels. Light isn't created by the liquid crystals themselves; instead, a light source behind the LCD panel shines through the display (CCFL LCD or LED LCD). A diffusion panel behind the LCD redirects and scatters the light evenly to ensure a uniform image. The display consists of two polarizing transparent panels and a liquid crystal solution sandwiched in between. The screen's front layer of glass is etched on the inside surface in a grid pattern to form a template for the layer of liquid crystals. Liquid crystals are rod-shaped molecules that twist when an electric current is applied to them. Each crystal acts like a shutter, either allowing light to pass through or blocking the light. The pattern of transparent and dark crystals forms the image.
= Worse contrast = LCD's have worse black levels, but better white levels. LCD's are a transmissive display which means it is edge-lit or full-array-lit and it also uses local dimming (aka backlight-flashing/scanning) which turns off sections of CCFL or LED which means you can get brightness uniformity problems (brightness leaks into areas and you can see the brightness changing to make up LCD's bad contrast and slow brightness changes.ect) which means less brightness accuracy and less color accuracy .ect (Better and/or expensive LCD use LED lights and more emissive local dimming display and more advance technologies to get a picture as good or better than a Plasma).
= Worse viewing angles = LCD uses a CCFL backlight or a LED backlight (transmissive display), and the LCD pixels act like shutters (and the red, green, blue filters), opening and closing to let light through or block it, this shutter effect causes increasing variations in picture brightness as viewers move further off axis (not directly in front of screen) which means you may notice that the picture looks less bright and vivid and you might see slight changes in color too (IPS > TN).
= Worse for dark-lit rooms, but better for bright-lit rooms = LED or LCD have the most light coming off from their screen which may strain your eyes in a dark-lit rooms, but they have little/no screen glare and little/no picture problems in bright-lit rooms.
= Worse response times = LCD'S liquid crystals take longer to change from on or off (switch around) which means more lag and more ghosting.ect
= Worse refresh rates = LCD's have more worse response times bundled with it's refresh rates which use backlight-flashing/scanning or fake interpolation frames (for judder too) or just repeat the same real frames which help reduce motion blur, but does not eliminate motion blur.
= Better screen size options, and better weight (thinner), and better manufacturer choices = LCD is a transmissive display which makes it easier to make a LCD screen size very small like around 20 inches and you may find them larger than 70 inches because they use less power consumption. LCD's tend to be about 10-20 pounds lighter too and are thinner (edge-lit displays are even thinner) but that can provide worse audio quality tho. Many brands of manufacturer to choice from.
= Better power consumption, and better life span, and little/no burn in, and little/no altitude problems = A LCD or a LED can cost on average around $50 a year less. A LCD or a LED can easily last 10 years and much more.
= Price = LED is more expensive to buy than Plasma, and LED is even more expensive to buy than LCD. LED and all the advance technologies going into them make cost more to make, but that's why there is budget LCD versions instead.
- I recommend Panasonic Plasma OR I recommend Samsung LED (better and/or expensive LED may not have the problems stated below because of additional technologies going into them). - http://reviews.cnet.com/best-tvs-picture-quality/
- Input lag for gamers: HD-TV may have more input lag if there is more processing going and how well the TV can process it. Example 1: Most PS3 or Xbox 360 video games are 720p, it would take processing power to upscale it to 1080p for a 1080p HD-TV (unless PS4 or Xbox one video games are 1080p it would be a good idea to get a 1080p HD-TV). Example 2: Interpolation and refresh rates can cause more processing too.ect = Gamer mode can turn off these processes to get less input lag.
- HD-TV viewing distance calculations: http://isthisretina.com/ OR http://www.thx.com/consumer/home-entertainment/home-theater/hdtv-set-up/ OR http://www.sony-asia.com/support/faq/47537 OR http://en.wikipedia.org/wiki/Optimum_HDTV_viewing_distance
- I am not going to talk about HD-TV features like 3D or smart HD-TV. Im not going to talk about projectors. Im not going to talk about the new OLED (RGB or W) HD-TV's.
- A plasma HD-TV is sometimes called an emissive display, the panel is actually self-lighting for each pixel. The display consists of two transparent glass panels with a thin layer of pixels sandwiched in between. Each pixel is composed of three gas-filled cells or sub-pixels (one each for red, green and blue). A grid of tiny electrodes applies an electric current to the individual cells, causing the gas (a mix of neon and xenon) in the cells to ionize. This ionized gas (plasma) emits high-frequency UV rays, which stimulate the cells' phosphors, causing them to glow the desired color.
= Better contrast = Plasma's have better black levels, but worse white levels. Plasma's are a emissive display which means better brightness accuracy and better color accuracy.
= Better viewing angles = Plasma is a emissive display, it has little/no picture problems when viewed of axis (not directly in front of screen).
= Better for dark-lit rooms, but worse for bright-lit rooms = Plasma's can have screen glare and less contrast and less brightness and faded colors in bright-lit rooms, but they have little/none of these problems in dark-lit rooms. Better and/or expensive Plasma's may use less reflective glass.
= Better response times = Plasma's florescent phosphor coating in each subpixel stops glowing just a few nanoseconds after the electrode turns off (on and off) which means less lag and less ghosting.ect
= Better refresh rates = Plasma's better response times bundled with it's sub-feild drives or focused-feild drives take each of a it's pixel's sub-pixels and flashes it a number of times to create a image, the way Plasma works has little motion blur with sub-feild drives or little/no motion blur (and better brightness control, color quality, contrast.ect) with focused-feild drives. (Plasma can use interpolation for judder too).
= Worse screen size options, and worse weight (thicker), and worse manufacturer choices = Plasma is a emissive display which makes it hard to make a Plasma screen size smaller than 40 inches for HD-TV and you may not find them larger than 70 inches for HD-TV because the power consumption will sky rocket. Plasma's tend to about 10-20 pounds heavier too and are thicker but that can provide better audio quality tho. Main brand Plasma maker is Panasonic or Samsung or LG.
= Worse power consumption, and worse life span, but better burn in, but worse high altitudes = A plasma can cost on average around $50 a year more. A Plasma can easily last 10 years and much more. Newer Plasma's have burn in technologies that make really hard or not possible to have permanent burn in, but there sill a chance you could get temporary burn in (even tho it's harder to do now). Plasma may not work in really high altitudes and if it does the TV would create a buzzing sound.
= Price = Plasma is more expensive to buy than LCD, but Plasma is less expensive to buy than LED. Plasma does not cost that much to make.
- An LCD HD-TV is sometimes referred to as a transmissive display, the panel has sections of lighting for a section of pixels. Light isn't created by the liquid crystals themselves; instead, a light source behind the LCD panel shines through the display (CCFL LCD or LED LCD). A diffusion panel behind the LCD redirects and scatters the light evenly to ensure a uniform image. The display consists of two polarizing transparent panels and a liquid crystal solution sandwiched in between. The screen's front layer of glass is etched on the inside surface in a grid pattern to form a template for the layer of liquid crystals. Liquid crystals are rod-shaped molecules that twist when an electric current is applied to them. Each crystal acts like a shutter, either allowing light to pass through or blocking the light. The pattern of transparent and dark crystals forms the image.
= Worse contrast = LCD's have worse black levels, but better white levels. LCD's are a transmissive display which means it is edge-lit or full-array-lit and it also uses local dimming (aka backlight-flashing/scanning) which turns off sections of CCFL or LED which means you can get brightness uniformity problems (brightness leaks into areas and you can see the brightness changing to make up LCD's bad contrast and slow brightness changes.ect) which means less brightness accuracy and less color accuracy .ect (Better and/or expensive LCD use LED lights and more emissive local dimming display and more advance technologies to get a picture as good or better than a Plasma).
= Worse viewing angles = LCD uses a CCFL backlight or a LED backlight (transmissive display), and the LCD pixels act like shutters (and the red, green, blue filters), opening and closing to let light through or block it, this shutter effect causes increasing variations in picture brightness as viewers move further off axis (not directly in front of screen) which means you may notice that the picture looks less bright and vivid and you might see slight changes in color too (IPS > TN).
= Worse for dark-lit rooms, but better for bright-lit rooms = LED or LCD have the most light coming off from their screen which may strain your eyes in a dark-lit rooms, but they have little/no screen glare and little/no picture problems in bright-lit rooms.
= Worse response times = LCD'S liquid crystals take longer to change from on or off (switch around) which means more lag and more ghosting.ect
= Worse refresh rates = LCD's have more worse response times bundled with it's refresh rates which use backlight-flashing/scanning or fake interpolation frames (for judder too) or just repeat the same real frames which help reduce motion blur, but does not eliminate motion blur.
= Better screen size options, and better weight (thinner), and better manufacturer choices = LCD is a transmissive display which makes it easier to make a LCD screen size very small like around 20 inches and you may find them larger than 70 inches because they use less power consumption. LCD's tend to be about 10-20 pounds lighter too and are thinner (edge-lit displays are even thinner) but that can provide worse audio quality tho. Many brands of manufacturer to choice from.
= Better power consumption, and better life span, and little/no burn in, and little/no altitude problems = A LCD or a LED can cost on average around $50 a year less. A LCD or a LED can easily last 10 years and much more.
= Price = LED is more expensive to buy than Plasma, and LED is even more expensive to buy than LCD. LED and all the advance technologies going into them make cost more to make, but that's why there is budget LCD versions instead.
Is buying a refurbished LG LED TV from walmart.com a bad idea?
Kayla
They have a 90 day warranty on them and so can be returned. I'm not sure what goes into the refurbishing process. Has anyone ever bought a refurbished television and if so, how did it work out for you?
Walmart.com has a deal for a 42" inch LG LED TV for $529. Would that be a good enough deal to risk buying it refurbished?
Answer
First understand that with a couple of exceptions, LED is only referring to the lighting panel in the set and not the little pixels. LED to CCFL is not of huge importance. Makes the set a little thinner.
May get more uniformity. Refurb with vary as to how much refurbishing it needed. Customer returns, display models, scratched, or truly repaired defective. 90 day warranty is an issue since when they break they are very expensive to fix. A 1 year squaretrade warranty on it is $90 as a guidance for a refurb set. Separate warranties are much cheaper than those sold in stores. Looks like you see the LG 42LE5350 which Walmart shows only as 60Hz and is actually the better 120Hz. It is very good for the price. Also, in-store closeout at Fry's electronics here is selling 42LE5500 for $600. Anyway, looks OK. I would be tempted to go for the 42LK450 at $498 new with the full warranty and some credit cards double warranty for free. At 42 inch even with LED vs CCFL in the lower contrast ratio it is still a great set.
First understand that with a couple of exceptions, LED is only referring to the lighting panel in the set and not the little pixels. LED to CCFL is not of huge importance. Makes the set a little thinner.
May get more uniformity. Refurb with vary as to how much refurbishing it needed. Customer returns, display models, scratched, or truly repaired defective. 90 day warranty is an issue since when they break they are very expensive to fix. A 1 year squaretrade warranty on it is $90 as a guidance for a refurb set. Separate warranties are much cheaper than those sold in stores. Looks like you see the LG 42LE5350 which Walmart shows only as 60Hz and is actually the better 120Hz. It is very good for the price. Also, in-store closeout at Fry's electronics here is selling 42LE5500 for $600. Anyway, looks OK. I would be tempted to go for the 42LK450 at $498 new with the full warranty and some credit cards double warranty for free. At 42 inch even with LED vs CCFL in the lower contrast ratio it is still a great set.
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