US 8,947,486 B2 · Light emitting element head, light emitting element array chip, and image forming apparatus

Abstract

A light emitting element head includes a first light emitting element array, a second light emitting element array, and an optical device. The first light emitting element array includes a plurality of light emitting elements arranged in a main scan direction. The second light emitting element array includes a plurality of light emitting elements arranged in the main scan direction. The optical device focuses a light output from the first light emitting element array and the second light emitting element array on a photoreceptor to form an electrostatic latent image on the photoreceptor. The first light emitting element array and the second light emitting element array are overlapped each other in a sub scan direction in an overlapping section. Interval between the light emitting elements of the first light emitting element array are different from interval between the light emitting elements of the second light emitting element array.

Drawings

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Drawings

Claims6

Dependent claims

A light emitting element head comprising:

a first light emitting element array that includes a plurality of light emitting elements arranged in a main scan direction, and that is provided on a single chip;
a second light emitting element array that includes a plurality of light emitting elements arranged in the main scan direction, and that is provided on a single chip different from the single chip having the first light emitting element array;
wherein the first light emitting element array and the second light emitting element array overlap each other in a sub scan direction in an overlapping section, at least one of the first light emitting element array and the second light emitting element array having a plurality of light emitting elements in the overlapping section;
an interval between the light emitting elements of the first light emitting element array in the overlapping section being different from an interval between the light emitting elements of the second light emitting element array in the overlapping section;
an interval between the light emitting elements of the first light emitting element array in a section where the first light emitting element array and the second light emitting element array do not overlap being substantially the same as an interval between the light emitting elements of the second light emitting element array in the section where the first light emitting element array and the second light emitting element array do not overlap;
an optical device that focuses a light output from the first light emitting element array and the second light emitting element array on a photoreceptor to form an electrostatic latent image on the photoreceptor;
and
a control unit that controls light emission of the light emitting elements of the first light emitting element array and the light emitting elements of the second light emitting element array,
wherein the control unit controls a magnification of an exposure range in the main scan direction by selecting, in the overlapping section, either the light emitting elements of the first light emitting element array or the light emitting elements of the second light emitting element array and controlling the selected light emitting elements to emit light.

6 more elements

A light emitting element head comprising:

a first light emitting element array that includes a plurality of light emitting elements arranged in a main scan direction, and that is provided on a single chip;
a second light emitting element array that includes a plurality of light emitting elements arranged in the main scan direction, and that is provided on a single chip different from the single chip having the first light emitting element array;
wherein the first light emitting element array and the second light emitting element array overlapping each other in a sub scan direction in an overlapping section, at least one of the first light emitting element array and the second light emitting element array having a plurality of light emitting elements in the overlapping section;
an interval between the light emitting elements of the first light emitting element array in the overlapping section being different from an interval between the light emitting elements of the second light emitting element array in the overlapping section;
an interval between the light emitting elements of the first light emitting element array in a section where the first light emitting element array and the second light emitting element array do not overlap being substantially the same as an interval between the light emitting elements of the second light emitting element array in the section where the first light emitting element array and the second light emitting element array do not overlap;
an optical device that focuses a light output from the first light emitting element array and the second light emitting element array on a photoreceptor to form an electrostatic latent image on the photoreceptor;
the first light emitting element array being composed of a plurality of light emitting elements arranged on a first single straight line extending in the main scan direction;
and
the second light emitting element array being composed of a plurality of light emitting elements arranged on a second straight line being parallel with the first straight line.

6 more elements

Dependencies are inferred from the claim text.

Description12,248 words

Summary213 words

#This application is based upon and claims priority under 35 USC 119 from Japanese Patent Application Nos. 2011-015409, filed Jan. 27, 2011, and 2011-191019, filed Sep. 1, 2011.

#The invention relates to a light emitting element head, a light emitting element array chip, and an image forming apparatus.

#According to an aspect of the invention, a light emitting element head includes a first light emitting element array, a second light emitting element array, and an optical device. The first light emitting element array includes a plurality of light emitting elements arranged in a main scan direction. The second light emitting element array includes a plurality of light emitting elements arranged in the main scan direction. The optical device focuses a light output from the first light emitting element array and the second light emitting element array on a photoreceptor to form an electrostatic latent image on the photoreceptor. The first light emitting element array and the second light emitting element array are overlapped each other in a sub scan direction in an overlapping section. An interval between the light emitting elements of the first light emitting element array in the overlapping section are different from an interval between the light emitting elements of the second light emitting element array in the overlapping section.

Brief description of the drawings18 figures

#Exemplary embodiments of the invention will be described in detail based on the following figures, wherein:

#FIG. 1 is a view illustrating an example of an entire configuration of an image forming apparatus according to an exemplary embodiment;

#FIG. 2 is a view illustrating a configuration of a light emitting element head according to the exemplary embodiment;

Detailed description11,637 words

#Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings.

#<Description of Image Forming Apparatus>

#FIG. 1 is a view illustrating an example of an entire configuration of an image forming apparatus according to an exemplary embodiment.

Facts

Application

13/301,187Filed 21 Nov 2011

Priority

JP 2011-01540927 Jan 2011

Published

US 2012/0194629 A12 Aug 2012

Granted

3 Feb 2015

Term ends

21 Nov 2031

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification2 codes

B41J 2/45
Using arrays of radiation sources: using light-emitting diode [LED] or laser arrays
B41J
Typewriters

Timeline

27 Jan 2011Priority claimedJP 2011-015409
21 Nov 2011Application filedUS 13/301,187
21 Nov 2011Assigned to Fuji Xerox Co., Ltd.assignment of assignor's interest
2 Aug 2012PublishedUS 2012/0194629 A1
3 Feb 2015GrantedUS 8,947,486 B2
12 Aug 2021Assigned to Fujifilm Business Innovation Corp.change of name
12 Oct 2026TodayWithin its term
21 Nov 2031Term endsEstimated

Light emitting element head, light emitting element array chip, and image forming apparatus

Life of this patent

Light emitting element head, light emitting element array chip, and image forming apparatus

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims6

Description12,248 words

Drawings

Description12,248 words

Classification2 codes

Life of this patent