Device having light source for exposure

Abstract

Abstract PURPOSE:To prevent uneven exposure in lighting, by providing means for controlling the light quantity of an exposure light source to control the start time of exposure with the light source in accordance with its control quantity. CONSTITUTION:A light source for exposure and variable resistor VR2 for controlling its light quantity are provided in order to enable automatic control of application time of the rating voltage for compensation of rising time in accordance with control quantity by variable resistor VR2. Raising the output of terminal T3 by controlling variable resistor VR2 to increase exposure causes transistor Q16 to increase action amount, resulting in decreasing the light emission quantity of light emission diode LED, permitting a sufficient time required for rising of lamp lighting to be ensured because transistor Q15 actuation time is extended till turning off.

Inventors

• 👤 Masahito Ishida
• 👤 Katsuyoshi Maejima
• 👤 Hisashi Sakamaki

Bibliographic Details