Apparatus for detecting output bond integrity in a display driver circuit
US6295621A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1993 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Apr 22, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/66
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A display driver circuit for driving a flat panel display including circuitry for detecting integrity of bonding of outputs of the driver circuit to the display. The bond integrity detecting circuitry includes a test mode current source which applies current to the output being tested to raise its voltage to a threshold level. At a defined sampling time following initiation of application of the test mode current, the voltage on the output being tested is compared to the threshold level, and the result of the comparison is stored and output from the driver circuit. If the voltage of the output has not reached the threshold level at the defined sampling time, the output connection is determined to be good.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.