Patent ID: 9153181
Filing Date: 2015-10-06
Classification: G09G

Abstract:
1. An electronic book comprising: a display panel comprising a plurality of pixels and an illuminance sensor, each of the plurality of pixels comprising an electrophoretic display element; a display control portion comprising a circuit configured to correct an image signal for the electrophoretic display element in accordance with illuminance detected by the illuminance sensor and a ratio of black grayscale level signals to white grayscale level signals among image signals to be input to the pixels in one screen; and a pixel circuit operationally connected to the electrophoretic display element, wherein the correction of the image signal is a process for inverting a grayscale level of the image signal from black to white or from white to black, wherein the process for inverting the grayscale level is performed when there are more black grayscale level signals than white grayscale level signals, and wherein the process for inverting the grayscale level is not performed when there are fewer black grayscale level signals than white grayscale level signals.