Evenly spaced, the light will be on for 6 seconds, then off for 6 seconds. For the whole minute, it's on for a total of 30 seconds, and off for 30 seconds, right? Something like this:. On average, the total amount of light in the room is 50 percent of what's possible. You have a maximum light on and a minimum light off each half the time. If you increase how often you switch the light, so fast that you no longer see the light turn on and off, instead of a flashing light bulb, the room will just appear dimly lit.
This is, in essence, how a plasma works. As a plasma TV engineer once told me and I mentioned in the refresh article , plasmas create light with time. To create different shades of gray, the pixel is on or off for more often. Because our TV system is 60Hz or in some places, 50Hz , and each one of those cycles has to be a complete image -- for example 60 images per second or 50 -- a plasma has to switch the subpixels on and off very rapidly. You could call these, to steal the modern parlance, Hz.
Most plasmas now have While not completely accurate, you can sort of think of it as the TV creates 10 dark images that your brain combines into one, full-brightness, image, 60 times a second. Bottom line As we discussed in "What is refresh rate?
Plasmas, by how they work, don't have an issue with motion blur. The Hz claim by all the current plasma TV manufacturers has to do with how the TVs create an image, but is not images per second. So yes, Hz is a marketing term. However, because plasmas don't require faster refresh rates to produce a clear, sharp image, and this is technically how they work, it's fair to give Panasonic, LG, and Samsung a pass Got a question for Geoff?
In Plasma TV there are 8 or 10 sub fields. This results in better picture. So don't worry about this. You see this better when you see a news ticker, a Hz one will be more sharper compared to a 60Hz.
This noticeable during sports. So pls dont compare Hz to Hz, they are completely different. LCDs are still trying to catch up with Plasma on this. That means no more frustrating afterimages in fast-action scenes.
Now you can enjoy smooth, clear motion in sports and fast action movies. What is Hz sub-field drive? A standard video signal is actually a series of still images, flashed on screen so quickly that we believe we are watching a moving image.
The typical frame rate used in North America is 60 frames per second 60Hz meaning that a TV would display 60 individual still images every second. Sub-field drive is the method used to flash the individual image elements dots on a plasma panel. For each frame displayed on the TV the Sub-field drive flashes the dots 8 times or more, meaning that the dots are flashing times per second Hz or more.
Last edited: Oct 5, Joined May 1, Messages 2, Points 83 Location bangalore. Click to expand Frankly, thats the answer I got when I spoke to my friend who works for Pana marketing :lol:, When they did their consumer survey last year one of the feedback repeatedly given was this, so they decided to highlight this year.
Baasha Golden Member. Jan 4, 1, 18 The latter models are a LOT cheaper now, especially without 3-D capability. And, wouldn't it be a no-brainer to take a Hz refresh rate over a seemingly measly Hz? Oct 20, 1, 0 0. Not really apples to apples, but I can quickly tell if a TV is a Hz vs. After watching my 4 year old plasma, I can still see "trails" on some of the new Hz TV's.
Haven't seen any Hz other than in stores and I'm not going to use their source as accurate representation of what I'd watch. Oct 13, 9, 16 Baasha said:. Dec 15, 4, 2 0. Jun 24, 6, 1 All marketing gimmicks. Apex Diamond Member. Oct 11, 6, 1 71 www. Apex said:. The hz rate for LCD panels 60hz, hz, hz, hz is to address the inherent slowness of LCD panels, in terms of response time. Maybe for some. It's much more useful for addressing the uneven division of 24 fps into 60 hz , providing correct frame display times each frame shown 5, 10, 20 times instead of alternating 2 and 3 for viewing movies.
Remember, most high-res content is way slower than 60hz. There isn't a single p60 native source outside of a high-end PC playing games. Again, the "hz" and up sets are designed to deal with this by interpolating frames to make, say, a i signal smoother. For movies, this is obviously an alternative to or pulldown -- and a worse one to most eyes.
Plasma solutions generally 72hz modes haven't worked as well.
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