| 摘要 |
An LED controller is provided that can easily control light-on testing of LEDs. A super voltage can be added to a signal including a low voltage and a high voltage. When the super voltage is not detected, LED driving circuit is operated in normal mode. When the super voltage is detected, LED driving circuit is operated in test mode. In test mode, the LEDs are turned on by a test signal directly input to LED driving circuit instead of by light emission data sent from shifter register to storage circuit. Accordingly, light-on testing of LEDs can be carried out easily.
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