| 摘要 |
The invention disclosed a rotatable lamp carriage for a scanner which can provide light source for a reflective sheet or a transparent sheet using only a single lamp. The invention mainly includes a lamp carriage, a base carriage, a rotatable arm, a support arm, and a driving device. The lamp carriage and the base carriage are connected together by the rotatable arm and the support arm. The rotatable arm which consists of a gear set controls the movement of the lamp carriage. When the rotatable arm is driven upwards, the lamp carriage provides light source for a transparent sheet. When the rotatable arm is driven downwards, the lamp carriage provides light source for a reflective sheet.
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