Display driver and method for evaluating display device
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United States of America Patent
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Nov 5, 2019
Grant Date -
Jan 26, 2017
app pub date -
Jul 22, 2016
filing date -
Jul 24, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A display driver for driving a display panel includes a test control unit that generates n test data each designating a brightness gradation for each pixel of the panel, and controls a connected-state test for testing the display panel in a connected-state where the display panel and the display driver are electrically connected and a disconnected-state test for testing the display driver in a disconnected-state where the display panel and the display driver are electrically disconnected, a voltage converter that generates n pixel drive voltages from the n test data, an output unit that supplies each of the n pixel drive voltages to a corresponding data line in the connected-state, and a fault evaluator that outputs a test result signal including a fault or a no-fault in the connected-state and the disconnected-state by checking if each of the n pixel drive voltages is within an acceptable gradation voltage range.
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