Title:
データドライバ及びそれを用いた表示装置
Document Type and Number:
Japanese Patent JP4615100
Kind Code:
B2
Abstract:
The present invention provides a data driver on which an operation test can be easily and reliably conducted at the stage of manufacture and for which the testing time can be reduced and a display utilizing the same. A select switch portion 60 is provided for electrically connecting and disconnecting a ladder resistor portion 56 and selector portions 58. At the ends of wiring of grayscale voltage lines l1 through l64 opposite to the ladder resistor portion 56, there is provided a state setting circuit 62 which sets each of the grayscale lines l1 through l64 at a "High" level or a "Low" level or which sets the ends of the grayscale voltage lines l1 through l64 in a high impedance state. The state setting circuit 62 is further connected to a testing control portion 64 incorporating a shift register which operates in synchronism with a test clock TST-CLK.
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Inventors:
Udo Shinya
Osamu Kudo
Osamu Kudo
Application Number:
JP2000217894A
Publication Date:
January 19, 2011
Filing Date:
July 18, 2000
Export Citation:
Assignee:
Fujitsu Semiconductor Limited
International Classes:
G02F1/133; G09G3/20; G09G3/36; G09G3/00
Domestic Patent References:
| JP4120912A | ||||
| JP11264855A | ||||
| JP8272337A | ||||
| JP62242423A |
Attorney, Agent or Firm:
Masaki Morioka