| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce power consumption and suppress display degradation of a liquid crystal display device, and suppress display degradation due to an external factor such as temperature. <P>SOLUTION: A transistor whose channel formation region is formed using an oxide semiconductor layer is used for a transistor provided in each pixel. Note that with the use of a high-purity oxide semiconductor layer, off-state current of the transistor at a room temperature can be 10aA/μm or less and off-state current at 85°C can be 100aA/μm or less. Consequently, power consumption of a liquid crystal display device can be reduced and display degradation can be suppressed. Further, as described above, off-state current of the transistor at a temperature as high as 85°C can be 100aA/μm or less. Thus, display degradation of a liquid crystal display device due to an external factor such as temperature can be suppressed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
