Patent ID: 8564530
Filing Date: 2013-10-22
Classification: G09G

Abstract:
1. A method for updating a bistable, electro-optic display device, comprising: (a) receiving a command to display an image; (b) generating synthesized pixel data from pixels of the image and pixels of a previous image; (c) comparing a first pixel of the image with a corresponding pixel of the previous image to determine if one of a first and a second condition is true, and selecting a monochrome update mode as a first update mode when the first condition is true, a pen update mode as the first update mode when the second condition is true, the second condition being determined only when the first condition is not true, and a gray-scale update mode as the first update mode when both of the first and second conditions are not true, (d) comparing a second pixel of the image with a corresponding pixel of the previous image to determine if one of a third and a fourth condition is true, and selecting the monochrome update mode as a second update mode when the third condition is true, the pen update mode as the second update mode when the fourth condition is true, the fourth condition being determined only when the third condition is not true, and the gray-scale update mode as the second update mode when both of the third and fourth conditions are not true; and (e) causing a first pipeline to determine a waveform for the first pixel of the image in accordance with the first update mode and to transmit the waveform as impulse data to the display device during a first period, and causing a second pipeline to determine a waveform for the second pixel of the image in accordance with the second update mode and to transmit the waveform as impulse data to the display device during a second period, wherein the first condition is that each of the first pixel of the image and the corresponding pixel of the previous image is white or black, wherein the second condition is that the first pixel of the image is white or black, wherein the third condition is that each of the second pixel of the image and the corresponding pixel of the previous image is white or black, wherein the fourth condition is that the second pixel of the image is white or black, wherein the first update mode is different from the second update mode, wherein the first period and the second period at least partially coincide in time, wherein each of the first pipeline and the second pipeline is used to update an arbitrary display region of the display device, and wherein a number of the pipelines allocated for the gray-scale update mode is larger than a number of the pipelines allocated for the monochrome update mode.