Title:
発光装置及び電流記憶回路
Document Type and Number:
Japanese Patent JP4202012
Kind Code:
B2
Abstract:
A current storing circuit capable of having a small area, a simple structure with the small number of devices, a low consumption current operation and high yield in manufacturing is provided. Applying the current storing circuit to the current-driving type of display device such as an OLED display device can improve the aperture rate of pixels and reliability of the display device as well as highly functionalize the display device. The invention is characterized by using a new semiconductor element in a shape of a transistor having plural drains or sources. When the semiconductor elements is used for both of a writing element and a driving element, reading in and storing a current value and outputting the current can be performed by only the two semiconductor elements, so that the area occupied by the devices would be easily reduced significantly.
Inventors:
Kazutaka Inukai
Application Number:
JP2001345273A
Publication Date:
December 24, 2008
Filing Date:
November 09, 2001
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
H01L29/786; H01L51/50; G09F9/30; H01L21/336; H01L21/77; H01L21/8238; H01L21/84; H01L27/08; H01L27/092; H01L27/12; H01L27/32; H01L29/423; H01L29/49; H01L29/78; H04N5/66
Domestic Patent References:
| JP60241266A | ||||
| JP4092475A | ||||
| JP4267551A | ||||
| JP7504782A |