Illuminating device, image reading apparatus including the illuminating device, and image forming apparatus including the image reading apparatus
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United States of America Patent
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Jul 28, 2020
Grant Date -
Sep 12, 2019
app pub date -
May 23, 2019
filing date -
Oct 30, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An illuminating device capable of stably illuminating an irradiated object such as a document while suppressing light loss with a simply structure is provided. An LED array and a reflective plate are disposed sandwiching a slit (St) through which light reflected by a document MS passes and a light-guiding member is disposed on the side of the LED array. The light-guiding member includes a direct emission unit disposed between an illumination range y centered on a document reading position and the LED array and an indirect emission unit disposed between the reflective plate and the LED array, a light incidence face of the direct emission unit and a light incidence face of the indirect emission unit are disposed at mutually different position around the LED array, and the LED array is disposed on a side of an interior angle formed by the light incidence faces.
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