发明名称 |
Image display device, drive circuit device and defect detection method of light-emitting diode |
摘要 |
A defect detection of light-emitting diodes (LEDs) is electrically performed on a large-scale display, comprising a plurality of light-emitting diodes arranged by a predetermined arrangement on an image display face, voltage detection portions for applying a constant current to a plurality of light-emitting diodes in an off region at a forward voltage or less in accordance with an input of a signal indicating a defect detection mode and detecting voltages between terminals of light-emitting diodes arising when the constant current flows there through, and a defect detection portion for electrically detecting a defect from the plurality of light-emitting diodes based on detection results of the voltage detection portion; and drive circuit devices (driver ICs) having the above configuration are serially connected and an electric signal indicating a result of defect detection is output from its final stage.
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申请公布号 |
US2004196049(A1) |
申请公布日期 |
2004.10.07 |
申请号 |
US20040799596 |
申请日期 |
2004.03.15 |
申请人 |
YANO MOTOYASU;TAKAGI YUICHI;KOMATSU YOSHIHIRO;SUZUKI MITSURU;KAWASE MASATAKA |
发明人 |
YANO MOTOYASU;TAKAGI YUICHI;KOMATSU YOSHIHIRO;SUZUKI MITSURU;KAWASE MASATAKA |
分类号 |
H04N5/66;G01N27/72;G01N27/82;G01R33/12;G09G3/00;G09G3/04;G09G3/14;G09G3/20;G09G3/32;H01L33/00;(IPC1-7):G01N27/72 |
主分类号 |
H04N5/66 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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