What is the self-refresh screen

I believe that a lot of users with Windows system have a habit, that is, when we work with the computer, will always go to the right mouse button to refresh the system. A friend with obsessive-compulsive disorder will brush the last 10 times in a row, psychologically thinking that the computer will be faster. This refreshing process is actually used to update the display information for the current data. In fact, Windows can automatically refresh itself, allowing the new settings to take effect, most of which require no manual intervention from the user. A lot of people take a computer other do not do, first click a seven or eight times, as if the number of refresh is less than the computer is not the same, in fact, it really is not necessary.

In fact, the above Balabala said so much, is to let everyone have a general understanding of the refresh. And what we are going to parse today, screen refresh technology (PSR) in fact, is not the earliest use of mobile phone technology, as early as the PC rampant era, this technology has been for the vast number of PC users. And in the rapid development of smartphones today, countless other areas in which the success of the technology has not been transplanted to the smart phone. The screen self-refresh technology (PSR) is one of them, so what is this technology in the end? After using the technology for a long time, why is this year again by the major smartphone manufacturers to mention, in today's encyclopedia, we have a good understanding of this technology.

Where is the benefit?

When you see the name of the screen from the refresh technique, a lot of friends in the brain may soon be the screen self-refresh technology is the phone's memory, if you can realize this, then congratulations to my friends, at least in the next article, you will be able to more quickly on this technology more in-depth understanding.

In fact, as early as this year, the PSR Technology has appeared on many smartphones, except that few mobile phone manufacturers have used the technology as a selling point of the product, and even rarely mentioned it in the launch of a new mobile phone, which has led to a large percentage of people not being very clear about the technology.

The PSR Screen self-refresh technique is all called the Panel self Refresh shorthand, which was first met by Inter at the Intel Information Technology Summit in the fall of 2011. At that time, the PSR Screen self-refresh technology is considered to be able to effectively reduce the PC platform power consumption technology and widely favored by the industry. And because of the PSR Technology, the screen panel does not need to be continuously refreshed, and the battery duration of the notebook can be extended by an additional 40 minutes.

So what's the benefit of this technology? In fact, the answer is really simple, just two words, save electricity. We know that the principle of mobile phone screen imaging relies on the GPU to continuously handle screen data to maintain. We all know that when you play a big 3d game with a cell phone or laptop, the power is tight, because the GPU needs to work constantly to keep up with the speed of the screen when it's running, and in the process, it consumes a lot of electricity.

Instead, when we look at an ebook or browse a static page using a mobile phone, because in this environment screen most of the situation is in the static, so do not need to achieve the GPU to play the refresh speed, then through the PSR technology can be stored before the data remap to the screen, so as to alleviate the GPU's operational pressure, When the GPU does not require a high intensity of work, the purpose of reducing power is naturally achieved.

How to Achieve

Once we know what the PSR technology can do for us, then we should talk about how the technology actually works.

Speaking of which, we have to go back to the screen memory we mentioned earlier in the article. First of all, we need to display the device to build an external frame acquisition card to facilitate the analysis of restricted frame statistics, and its role is to compare the current frame with the previous frame, and use the counter to track idle frames, the final statistics.

If the above words make you see the fog, then we will be another way to explain, the mobile phone as an example. When our mobile phone needs to rely on screen memory to implement the graphics data storage, you need to compare the screen display of each frame, so as to analyze the statistical data that restricts each frame, when the chip recognizes that the current frame of the picture data and the previous frame of the graphic data consistent, then the other transmission circuit to suspend operations.

In other words, when the screen of our mobile phone display in a small period of time to maintain the same, the screen will automatically detect is not in the refresh, power is down. When the screen memory receives new graphics data, PSR automatically contacts and repeats the previously detected process to complete the next operation to suspend other transmission circuits.

Seeing here, it's not hard to find that there are a number of cases in which people are transforming old and very mature technologies into smartphones. In the transformation of technology, we have achieved the best of our time. Smartphones have become fast-moving products, but before new technologies or new features emerge, it is hard for consumers to have the power to constantly change their phones.