Exposure device and printer
AssigneeOce-Nederland B.V.
InventorHans Reinten
Life of this patent
Estimating the term…
Abstract
An exposure device comprising a straight row of substantially rectangular LED's, each LED comprising at least one non-emitting zone (34) having a width (a) which divides the LED into at least two equal parts (32, 33) having a width (c), a separating zone (35) of width (b) being situated between each of the LED's and the width (a) of the non-emitting zone (34) being smaller than 1.5 times the width (b) of a separating zone (35) and larger than 0.75 times the width (b) of the separating zone (35).
Claims14
An exposure device of relatively lower light emitting area density, the device comprising:
- a straight row of pairs of equally-sized rectangular light emitting areas;
- said equally-sized rectangular light emitting areas of each pair being separated by an energizing electrode of a first width, a;
- each two adjacent said pairs being separated by a second width, b, such that said first width, a, and said second width, b, have a first relation, 0.75b<a<1.5b;
- and
- each said equally-sized rectangular light emitting areas being of a third width, c, such that said third width, c, is approximately equal to a/3.
A printer of relatively lower light emitting area density, the printer comprising:
- a straight row of pairs of equally-sized rectangular light emitting areas;
- a photosensitive element which can be moved past said straight row of said pairs;
- said equally-sized rectangular light emitting areas of each pair being separated by an energizing electrode of a first width, a;
- each two adjacent said pairs being separated by a second width, b, such that said first width, a, and said second width, b, have a first relation, 0.75b<a<1.5b;
- and
- each said equally-sized rectangular light emitting areas being of a third width, c, such that said third width, c, is approximately equal to a/3.
An exposure device of relatively lower light emitting area density, the device comprising:
- a straight row of pairs of equally-sized rectangular light emitting areas;
- said equally-sized rectangular light emitting areas of each pair being separated by an energizing electrode of a first width, a;
- each two adjacent said pairs being separated by a second width, b, such that said first width, a, and said second width, b, have a first relation, 0.75b<a<1.5b;
- each said equally-sized rectangular light emitting areas being of a third width, c, such that said third width, c, and said first width, a, have a second relation a/3<c<a;
- and
- said first and second relations resulting in a light output profile for which all peaks exhibit a first magnitude and all troughs exhibit a second magnitude less than said first magnitude.
A printer of relatively lower light emitting area density, the printer comprising:
- a straight row of pairs of equally-sized rectangular light emitting areas;
- a photosensitive element which can be moved past said straight row of said pairs;
- said equally-sized rectangular light emitting areas of each pair being separated by an energizing electrode of a first width, a;
- each two adjacent said pairs being separated by a second width, b, such that said first width, a, and said second width, b, have a first relation, 0.75b<a<1.5b;
- and
- each said equally-sized rectangular light emitting areas being of a third width, c, such that said third width, c, and said first width, a, have a second relation, a/3.ltoreq.c.ltoreq.a;
- and
- said first and second relations resulting in a light output profile of said exposure device for which all peaks exhibit a first magnitude and all troughs exhibit a second magnitude less than said first magnitude.
Dependencies are inferred from the claim text.