Memory LCD line up draw less than 1% of the power required by conventional TFT LCDs
Sharp has also equipped the LS044Q7DH01 with a transmissive portion of 0.25% in order to provide the display with backlighting, when needed, allowing good readability even in complete darkness. This function is an advantage for sports computers and even for measuring devices, which sometimes also have to be used at night. Like all Memory LCDs, the LS044Q7DH01 also belongs to the class of ultra-low power displays, with a power input (without backlight) of just 0.25mW with static images and 0.65mW with a frame rate of 1Hz. The 1.28" measures 26.6×30.3×0.75mm for a resolution of 128×128 pixels.
It has a transmissivity of 0.2%, which means the display can optionally be equipped with a backlight as well. The LS012B4DG01’s edges have a length of 35.1×11.0mm and a resolution of 184×38 pixels, making it suitable as a function and control display of battery-operated tools. The 1.17“ display can operate at temperatures ranging from -10 to +70°C. In addition, the relatively long ribbon cable (52mm) allows the display to be flexibly positioned and integrated in the housings of power tools. The minimal energy consumption of the Sharp Memory LCDs results from the fact, that each pixel of the display has a 1-bit memory that stores the image data loaded on the screen. Image information therefore only needs to be rewritten in the pixels in which the content has changed, as compared to the previous screen frame. Being reflective displays, Memory LCDs don’t require any backlighting. The combined result is that Memory LCDs require only 0.8 percent of the power needed by conventional displays of the same size. In the case of conventional transmissive LC displays, microcontrollers have to rewrite the entire screen content from frame to frame at a speed of 50 to 60 Hz, even if the majority of image content remains the same. In addition to this, the backlight accounts for a good percentage of the power consumed. This means that the power consumed by standard LCDs is approximately 130 times higher than that of Memory LCDs.
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