Display device and electronic device

摘要

Multiple gray levels are expressed in a display device. The display device includes a pixel portion where pixels including transistors and display elements are arranged in matrix, a gate driver electrically connected to a gate of the transistor, a source driver electrically connected to a source or a drain of the transistor, and a data processing circuit which outputs a signal to the source driver. The transistor includes an oxide semiconductor. In the data processing circuit, n-bit digital data of input m-bit digital data (m and n are positive integers, where m>n) is used for voltage gradation and (m−n) bit digital data is used for time gradation.

主权项

1. A display device comprising:
a pixel portion comprising pixels arranged in matrix wherein each of the pixels includes a transistor and a display element; a gate driver electrically connected to a gate of the transistor; a source driver electrically connected to one of a source and a drain of the transistor; and a data processing circuit configured to output signals to the source driver, wherein the transistor has a channel formation region including an oxide semiconductor, wherein the data processing circuit is configured to output the signals by using n-bit digital data of input m-bit digital data for voltage gradation and by using (m−n) bit digital data for time gradation, wherein m and n are positive integers, where m>n, and wherein an off-state current per unit channel width of the transistor is 10 aA/.mu.m or less.