| 摘要 |
A light emitting device includes light emission units, a voltage generator, a lighting selector, and a drive control unit. Each light emission unit includes light emitting component groups each of which includes a light emitting component array and a drive switch. The light emitting component array includes light emitting components that are connected in series. The drive switch is connected in series to the light emitting component array to drive the light emitting component array. The lighting selector selects the light emitting component group that is to be lit on according to brightness intensity required for each light emission unit. The drive control unit controls each drive switch independently according to the selection by the lighting selector and controls to light on each light emitting component group independently and controls the voltage generator to generate a common drive voltage.
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