| 摘要 |
A display driver drives a display in which each pixel includes a light-emitting element, a transistor that supplies current to the light-emitting element, and a capacitor that controls the transistor. To determine the threshold voltage of the transistor, the display driver charges the capacitor to an initial voltage, then allows the capacitor to discharge through the transistor, measures the time that elapses until the capacitor reaches a reference voltage intermediate between the initial voltage and the threshold voltage, and calculates the threshold voltage from the elapsed time. This measurement method is quick and does not require an analog-to-digital converter. The measured values are used to generate correction data to compensate for threshold voltage shifts.
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