Thursday, June 19, 2014

pros and cons of an led hdtv versus an lcd or plasma?


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

- 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). -
- 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: OR OR OR
- 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.

best HDTVs for gaming?


I recently tried out a 46" 120hz insignia lcd (6.5 ms) from best buy and it was complete crap, had to return it. I was told that i needed the 120hz for gaming however when I tried to play any FPS the 120hz feature just made it so "laggy" i could not even attempt to play but when i turned the 120hz off it seemed okay.
I now have a cheapo 40" rca lcd from walmart (I believe 8ms and 60hz) nothing to write home about. with both of these tvs (more so with the rca) it is making fps games really hard to play. i would not say it seems like input lag, when i click A to jump my person jumps immediately etc. The best way I can describe it is when I look Left or Right, Up or Down it feels/looks really "jerky", god forbid I am also Moving while Looking, so jerky its not even funny. Also, sometimes I swear my cursor moves on its own, like I have auto aim set to "ON" which I do not. I notice this "moving cursor" thing mainly when there is alot of stuff happening in front of me (ie" a bunch of enemies running around in front of my cursor) I feel like I would be better off just using my 15 year old 27" sharp tv even though any text on it is unreadable and blurry which makes RPG impossible to play.

So what exactly do I need to do? I thought about trying out a plasma but they seem sooo dark, the cd/m2 ratings on plasmas seem very low and every plasma at the stores seem alot darker than lcds. And its not about the money, I would be okay with splurging a little on something that was actually worth it, so far I have been trying to be cheap about it and get 700 and 500 dollar tvs, which suck apparently. My goal would be to get a 46 or 47" 1080p, but I could live with a 40 or 42" I guess. I just want something that is bright, good black levels but still able to discern detail, and good for games. Any suggestions would be appreciated!

LG 32LH30 32-Inch 1080p LCD HDTV

Review: LG doesânt get enough praise.
Just bought this TV for the sake of it being an IPS panel and for its apparent adjustability (and also 1080p). Plus this tv is so easy to calibrate; the âpicture wizardâ is extremely helpful.
The amount of menu options is jaw-dropping, as is the style of the set. The LH40 model looks neat with the plastic square along the bottom of the panel, but I like the more minimalist look of the LH30, and I do not like the 120hz or the $100 price jump of the LH40.
I made a comparison to my sony 32M4000 (which I have now given to my father) and there are some interesting differences (many are polar opposites):
-The sound is far superior on the LG.
-Black levels are very close, sonyâs is a bit deeper and maintains black colors better at angles.
-The whiteness of whites is slightly better on the sony, but colors and mid tones definitely have more of a âpunchyâ factor on the LG.
-Color is amazing; rich and saturated; best ive seen on any LCD, period.
-Color does not wash out at all from different angles, only very dark colors and black tend to become discolored (blue or red depending on the angle).
-Of course there are far, far fewer picture options on the sony.
-My sony has a ghosting problem with dark colors, not so on the LG; motion blur and lag is also reduced too.
-OTA HD channels look decent enough, not as sharp as the sony, but the better color makes up for it imo.
What was the main factor that made me get this LG?..its S-IPS panel.
Samsung is an excellent maker of lcds, but I steered clear of them this time, as buying a tv from them is like playing the lottery. They use 3 different panels with differing levels of color and contrast quality; you are not essentially getting what you pay for:
You may get Samsungâs own S-PVA panel, the best quality (if youâre lucky).
An A-MVA panel from Taiwanâs AUO (a notch worse than S-PVA).
Chinese company Chi Meiâs S-MVA panel (worst of the three).
Panasonics IPS Alpha panels are decent, but on some panels dark colors appear far too blue from different angles.
That narrows it down to LGâs S-IPS panel; its color saturation, vividness, and response time are worth the slight sacrifice in contrast and black depth (at least in my opinion).
This tv is not perfect, however; I spotted 3 dead pixels right out of the box (2 bright, 1 dark), right around the middle of the screen. They are practically invisible without being a foot from the screen and looking hard for them, however.
Viewing angles demonstrate some darkening of the picture, but its not too bothersome (swivel stand helps).
No other flaws I can think of at the moment, I recommend this tv!
My calibration settings use color adjustments from along with some of my own tweaks, try them out!
Picture menu:
Aspect ratio: Just Size
Energy Saving: Off
Picture Mode: Expert 2
Backlight: 60
Contrast: 88
Brightness: 58
H Sharpness: 60
V Sharpness: 60
Color: 50
Tint: 0
âExpert control menu
Dynamic contrast: Off
Noise reduction: Off
Gamma: Medium
Black level: Low
Real Cinema: On [grayed out]
Color Standard: HD [grayed out]
Color Gamut: Wide
Edge Enhancer: Off
xvYCC: Auto [grayed out]
OPC: Off
Expert Pattern: Off[grayed out]
Color Filter: Off
White balance: Medium
Method: 10 point IRE
Pattern: Outer
IRE: [see below]
Luminance: 137 (100 Luminance only, 90 through 10 are preset)
â 10 point IRE calibration
IRE: [Red, Green, Blue results, respectively, for each IRE point]
100 [-8, 1, -40]
90 [-13, -5, -40]
80 [-20, -12, -40]
70 [-17, -14, -33]
60 [-17, -12, -31]
50 [-17, -13, -26]
40 [-13, -12, -19]
30 [-6, -4, -8]
20 [-6, -4, -10]
10 [2, 3, -1]
Color management system
Red color: 2
Red tint: 0
Green color: -1
Green tint: -7
Blue color: 2
Blue tint: 7
Yellow color: 0
Yellow tint: 1
Cyan color: 0
Cyan tint: 0
Magenta color: 0
Magenta tint: â2

Powered by Yahoo! Answers

No comments:

Post a Comment