Light guide and charge eliminating unit, image forming apparatus and image reading apparatus having the same
AssigneeSamsung Electronics Co., Ltd.
InventorsKyung Rok Kim, Yong Geun Kim, Hyun Surk Kim
Life of this patent
Estimating the term…
Abstract
Disclosed are a light guide member, a charge eliminating unit and an image forming apparatus and/or an image reading apparatus having the same. The light guide member may include an incidence face through which light is introduced, an irregular reflection portion arranged along a longitudinal direction of the light guide member for irregular reflection of the light introduced through the incidence face and an emission face arranged opposite the irregular reflection portion for emission of the light. At least one recess may be formed in the incidence face for diffusion of the light introduced through the incidence face.
Claims23
A light guide member having a length that extends along a longitudinal direction from a first end to a second end opposite the first end, comprising:
- an incidence face arranged at the first end, the incidence face being configured to allow light incident thereupon to be received into the light guide member;
- a irregular reflection portion extending along the longitudinal direction, the irregular reflection portion defining a irregular reflective surface that causes an irregular reflection of the light received through the incidence face;
- and
- an emission face extending along the longitudinal direction and opposing the irregular reflection portion, the emission face being configured to allow light to exit therethrough from the light guide member,
- wherein the incidence face comprises at least one recess formed thereon so as to cause a diffusion of the light received through the incidence face.
A charge eliminating unit for removing electrical charge from a photoconductor of an image forming apparatus, comprising:
- a light source configured to produce light;
- and
- a bar-shaped light guide member having a length that extends along a longitudinal direction from a first end to a second end opposite the first end,
- wherein the bar-shaped light guide member comprises:
- an incidence face arranged at the first end facing the light source such that the light produced by the light source becomes incident thereupon and is received therethrough into the bar-shaped light guide member;
- a irregular reflection portion extending along the longitudinal direction, the irregular reflection portion defining a irregular reflective surface that causes an irregular reflection of the light received through the incidence face;
- and
- an emission face extending along the longitudinal direction and opposing the irregular reflection portion, the emission face being arranged to face the photoconductor and being configured to allow light to exit therethrough from the bar-shaped light guide member toward the photoconductor, and
- wherein the incidence face comprises at least one recess formed thereon so as to cause a diffusion of the light received through the incidence face.
An image forming apparatus, comprising:
- a photoconductor having a photosensitive surface;
- and
- a charge eliminating unit configured to illuminate the photosensitive surface of the photoconductor to thereby remove an electrical charge from the photoconductor,
- wherein the charge eliminating unit comprises:
- a light source configured to produce light;
- and
- a bar-shaped light guide member having a length that extends along a longitudinal direction from a first end to a second end opposite the first end, and
- wherein the bar-shaped light guide member comprises:
- an incidence face arranged at the first end facing the light source such that the light produced by the light source becomes incident thereupon and is received therethrough into the bar-shaped light guide member;
- a irregular reflection portion extending along the longitudinal direction, the irregular reflection portion defining a irregular reflective surface that causes an irregular reflection of the light received through the incidence face;
- and
- an emission face extending along the longitudinal direction and opposing the irregular reflection portion, the emission face being arranged to face the photoconductor and being configured to allow light to exit therethrough from the bar-shaped light guide member toward the photoconductor, and
- wherein the incidence face comprises at least one recess formed thereon so as to cause a diffusion of the light received through the incidence face.
An image reading apparatus for reading an image of a document by illuminating and sensing light reflection from the document, comprising:
- a light source configured to produce light;
- and
- a light guide member having a length that extends along a longitudinal direction from a first end to a second end opposite the first end,
- wherein the light guide member comprises:
- an incidence face arranged at the first end facing the light source such that the light produced by the light source becomes incident thereupon and is received therethrough into the light guide member;
- a irregular reflection portion extending along the longitudinal direction, the irregular reflection portion defining a irregular reflective surface that causes an irregular reflection of the light received through the incidence face;
- and
- an emission face extending along the longitudinal direction and opposing the irregular reflection portion, the emission face being configured to allow light to exit therethrough from the light guide member toward the document, and
- wherein the incidence face comprises at least one recess formed thereon so as to cause a diffusion of the light received through the incidence face.
Dependencies are inferred from the claim text.