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?
Send him an e-mail! No, he won't tell you which TV to buy. You can also send him a message on Twitter: TechWriterGeoff. Be respectful, keep it civil and stay on topic. We delete comments that violate our policy , which we encourage you to read.
Discussion threads can be closed at any time at our discretion. What is Hz? Geoffrey Morrison. So, I guess they have improved their electronics and then attributing it to Hz Post reply.
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This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. By continuing to use this site, you are consenting to our use of cookies. Instead, LCD chips require an additional back or edge light source to produce images that you can see on the screen.
On the other hand, each pixel in a plasma TV is self-emissive. This means that plasma TV pixels generate light within a cell structure an additional backlight source isn't required. However, it can only do so for a brief time measured in milliseconds. Electric pulses must be sent at a rapid rate to plasma TV pixels for the pixels to remain lit. The sub-field drive specification states the rate of how many of these pulses are sent to the pixels each second to keep the frame visible on the screen.
If a plasma TV has a 60 Hz screen refresh rate, which is most common, and if the sub-field drive sends 10 pulses to excite the pixels within a 60th of a second, the sub-field drive rate is stated as Hz. Images look better and motion between each video frame looks smoother when more pulses are sent within the 60 HZ refresh rate time period.
This is because pixel brightness doesn't decay as quickly during the time when a frame is displayed, nor when transitioning from frame to frame. Although LCD and Plasma TVs outwardly look the same, there are internal differences in how each displays what you see on the screen.
One unique difference in plasma TVs is the implementation of sub-field drive technology to enhance motion response. Can you see a difference in image quality and motion between plasma TVs with sub-field drive rates of Hz, Hz, or Hz? The best way to find out is to do an eyes-on comparison to see what looks best to you. You can find out your TV's refresh rate from the documentation that came with it, or you can do a Google search.
Unlike a computer monitor, you can't change the refresh rate on a plasma TV, but you can optimize your viewing by ensuring your source's refresh rate matches your TV. For example, if you're using a Blu-Ray player with a p 60Hz TV, make sure the player also outputs video at p and 60Hz. TVs with a variable refresh rate support a specific range of refresh rates and adapt on the fly to what's shown on the screen. This is especially handy for gaming, where frame rates can vary from one moment to the next.
Variable refresh rates also help lower power consumption on laptops and mobile devices when not in use. Plasma Televisions have always been superior in the motion lag fast action scenes category due to the nature of plasma technology.
There are no twisting crystals but instead pixels composed of 3 phosphor colors which each have their own electrode affixed to the back. These charges are extremely fast. So Panasonic and then the other plasma manufacturers found a way to measure the processing speed and came up with the term Subfield Drive or Sub-field Motion as a way to describe it. It describes a comparable speed for Plasma TVs of Hz or the image flashing times per second to redraw the image. The benefits of faster processing are smoother side to side panning, no motion lag in fast moving scenes, crisper and clearer images, smoother contouring transitions, and cleaner image edges.
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