For a image to be viewed without any flicker, a specific frame rate need to be maintained. It means the processor has to resend the frame continuously to the screen at that rate. The terminology that describes such an action is panel self refresh. If you take modern systems, it is the GPU which handles this other than the main processor. Transmitting frames continuously may consume some power and this plays a crucial role in the performance of battery powered systems. LG in their latest smartphone, the G2 introduced graphic RAM technology. They claim that by introducing a local cache (in display circuitry), the GPU need not communicate with display. this is possible only in the case of a static display. Imagine you reading a ebook, watching a pic on your smartphone. This helps reduce power consumption because the GPU is not stressed for sometime. LG claims that 26% reduction in energy usage can be achieved with this new technology.
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