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AssigneeRohm Co., Ltd.
InventorsHidekazu Kikuchi, Akinobu Sawada
Estimating the term…
The light emitting device control circuit device 100 in accordance with the disclosure includes a power source V1, a transistor TR1, a light emitting unit EU1, switches S1 to S17, constant current sources CC1 to CC17, and a controller 110. A switching voltage Vs1 is supplied from the controller 110 to turn ON or turn OFF the transistor TR intermittently, a pulse voltage is supplied to a pulse voltage supplying line Y1 connected to a drain terminal D of the transistor TR1. The driving signals SP1 to SP17 are sequentially supplied to the switches S1 to S17 to turn ON or turn OFF them (i.e., time division drive). The light emitting devices A1 to A17 are driven sequentially by a pulse current (i.e., time division drive) when a high voltage is supplied to the pulse voltage supplying line Y1 and when the driving signals SP1 to SP17 are turned ON.
A light emitting device control circuit device comprising:
A method to control a light emitting device control circuit device, for controlling an ON-OFF state of multiple light emitting devices provided as a m by n matrix pattern (where m and n are integers equal to or greater than two), ON-OFF timings for the m by n light emitting devices are shifted with respect to each other by a predetermined period, wherein illuminating periods of the light emitting devices belonging to a same line are so set as to occur with a small delay relative to and an overlap between one another, and driving of different lines so proceeds that, after the driving of one line is completed, the driving of a subsequent line is started.
Dependencies are inferred from the claim text.