Patent ID: 7995085
Filing Date: 2011-08-09
Classification: B41J,G03G

Abstract:
1. A line head, comprising: a head substrate; a first chip that includes light emitting elements and is on the head substrate; a second chip that includes light emitting elements, is on the head substrate and is arranged in a first direction to the first chip, the first direction being on the head substrate; a third chip that includes light emitting elements, is on the head substrate and is arranged in a second direction to the first chip, the second direction being on the head substrate and orthogonal or substantially orthogonal to the first direction; a lens array that has lenses facing the first chip, lenses facing the second chip, and lenses facing the third chip; and a light shielding member that is arranged between the head substrate and the lens array, wherein the lenses facing the first chip are arranged in the second direction, have an inverting property, and image a light emitted from light emitting elements of the first chip, the lenses facing the second chip are arranged in the second direction, have an inverting property, and image a light emitted from light emitting elements of the second chip, the lenses facing the third chip are arranged in the second direction, have an inverting property, and image a light emitted from light emitting elements of the third chip, the light emitting elements are arranged at facing positions to which the lenses face, and form light emitting element groups, the light shielding member is formed with light guiding holes that are in correspondence with the light emitting element groups, light emitted from the light emitting element groups passes through the light guiding holes and is imaged by the lenses, the light shielding member prevents interference of light between two light emitting element groups of the first chip and the second chip arranged in the first direction, and the light shielding member prevents interference of light between two light emitting element groups of the first chip and the third chip arranged in the second direction.