Exposure head and printer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 14, 2000
Grant Date -
N/A
app pub date -
May 5, 1998
filing date -
Jul 9, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An exposure head wherein a light-shielding panel having enclosing openings capable of receiving individual LED chips, and a front surface panel having small openings are disposed at a front surface of an LED panel in which the LED chips are arranged, is provided. In the exposure head, the LED chips and bonding wires can be housed in the enclosing openings, and can be protected from a medium to be exposed, by the front surface panel. Therefore, each dot can be irradiated with exposure light from the LED chips, which are disposed close to the photosensitive medium, so that each dot can be exposed without using a lens system. The inside surfaces of the enclosing openings are made reflective to prevent exposure light from leaking from the cells in which the individual LED chips are housed, into other LED chip cells, so that each dot can be exposed to high-intensity exposure light. Therefore, it is possible to provide a small-size and low-price exposure head capable of performing good-quality and high-resolution printing without color bleeding or the like, and a low-price printing apparatus employing the exposure head.
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