Title:
DISPLAY DEVICE, DRIVING CIRCUIT, AMORPHOUS SILICON THIN FILM TRANSISTOR AND DRIVING METHOD OF OLED
Document Type and Number:
Japanese Patent JP3956347
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To appropriately obtain a threshold voltage (Vth) by an amorphous silicon TFT.
SOLUTION: The driving circuit is provided with a self light emitting OLED 21, a driving transistor 22 which drives the OLED 21, a branching transistor 23 which is formed by making a portion of the electrodes of the transistor 22 independent and detects the threshold voltage (Vth) of the transistor 22, a compensation capacitor 28 into which the voltage (Vth) detected by the transistor 23 is written, a signal capacitor 27 into which signal voltages for the transistor 22 are written, a first transistor 24 which is located between a data line and the capacitor 27, a second transistor 25 which is located between the capacitors 27 and 28 and a third transistor 26 which is located between the gate electrode of the transistor 23 and other electrode.
Inventors:
Yoshinao Kobayashi
Takatoshi Tsujimura
Shinya Ono
Takatoshi Tsujimura
Shinya Ono
Application Number:
JP2002050171A
Publication Date:
August 08, 2007
Filing Date:
February 26, 2002
Export Citation:
Assignee:
INTERNATIONAL BUSINESS MASCHINES CORPORATION
International Classes:
G09G3/30; G09F9/30; H01L51/50; G09G3/20; G09G3/32; G09G3/3225; G09G3/3266; G09G3/3283; G09G3/3291; H01L27/32; H01L29/417; H01L29/423; H01L29/786; (IPC1-7): G09F9/30; G09G3/20; G09G3/30; H01L29/786; H05B33/14
Domestic Patent References:
| JP11219146A |
Foreign References:
| WO2001006484A1 |
Attorney, Agent or Firm:
Hiroshi Sakaguchi
Yoshihiro City
Yoshihiro City