Title:
DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/154691
Kind Code:
A1
Abstract:
The present invention provides a display device with which it is possible to display useful information in an easily readable manner at a time of normal drive and display emergency information continuously for a long time at a time of emergency drive that is exercised in case of emergency. When the supply of power being supplied from an external power source (40) is stopped, emergency information data EMD is read out from a ROM (13) and written into a pixel circuit (27). Because a TFT (28) having a channel layer comprising an oxide semiconductor of which the leakage current is very small is formed in the pixel circuit (27), the written emergency information data EMD is held over a long time even when the supply of power SV2 from a battery circuit unit (30) is stopped. Thus, even when the supply of electricity from the external power source (40) is stopped, emergency information can be issued to persons present in the vicinity of the display device.
Inventors:
YAMAGUCHI NORIAKI
Application Number:
PCT/JP2017/008054
Publication Date:
September 14, 2017
Filing Date:
March 01, 2017
Export Citation:
Assignee:
SHARP KK (JP)
International Classes:
G09G3/36; G02F1/133; G02F1/13357; G08B5/36; G08B23/00; G09G3/20; G09G3/34
Foreign References:
| JP2014191047A | 2014-10-06 | |||
| JP2008107783A | 2008-05-08 | |||
| JP2011191746A | 2011-09-29 | |||
| JP2009135719A | 2009-06-18 | |||
| JP2004037705A | 2004-02-05 | |||
| US20090073157A1 | 2009-03-19 |
Attorney, Agent or Firm:
SHIMADA, Akihiro et al. (JP)
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