Sharp Corp exhibited reflective LCD panels whose power consumption is as low as 10μW at FPD International 2008.
They are so-called "pixel memory LCDs," which incorporate a 1-bit memory in each pixel to reduce power consumption by retaining image data written in the memory.
Sharp exhibited 1.4-inch monochrome and color panels with a resolution of 96 x 96. The monochrome models were black-and-white bilevel and eight gradation panels, and the color model was an eight-color panel. The company also exhibited a panel combined with a solar cell, highlighting the low power consumption of the panel.
The memory embedded in the pixels is probably SRAM though Sharp did not disclose the details. The company did not reveal other information including the number of TFTs that constitutes a memory.
With the use of light scattering liquid crystals, the LCD panels do not need a polarizer, the company said. The reflectivities of the monochrome panels and the color panel are 50% and 20%, respectively. They operate with a 5V single power supply.
Sharp expects that the new panels will be used for sub-displays of mobile phones and other devices that have not been equipped with a display such as remote controls.