JPH0569591A - End face emitting-type light exposing device - Google Patents

End face emitting-type light exposing device

Info

Publication number
JPH0569591A
JPH0569591A JP23437191A JP23437191A JPH0569591A JP H0569591 A JPH0569591 A JP H0569591A JP 23437191 A JP23437191 A JP 23437191A JP 23437191 A JP23437191 A JP 23437191A JP H0569591 A JPH0569591 A JP H0569591A
Authority
JP
Japan
Prior art keywords
scanning direction
main scanning
image
outline
line heads
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP23437191A
Other languages
Japanese (ja)
Inventor
Hiroshi Hara
啓 原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba TEC Corp
Original Assignee
Tokyo Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Electric Co Ltd filed Critical Tokyo Electric Co Ltd
Priority to JP23437191A priority Critical patent/JPH0569591A/en
Publication of JPH0569591A publication Critical patent/JPH0569591A/en
Pending legal-status Critical Current

Links

Landscapes

  • Dot-Matrix Printers And Others (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE:To obtain an end face emitting-type light exposing device capable of ideally smoothing a part where an outline representing a profile of an image is inclined. CONSTITUTION:A large number of flat end face emitting-type EL elements which are long in a main scanning direction are arranged in (n) arrays in the main scanning direction to form (n) arrays of line heads 1, 2. The (n) arrays of line heads 1, 2 are disposed in parallel to each other with a shift of 1/n of the length of the EL element so as to be opposed to a photosensitive body 3. At a part where an outline representing a profile of an image is inclined in the main scanning direction, pixel forming elements are overlapped with the shift in the main scanning direction by lights from the end face emitting-type EL elements of the (n) arrays of line heads 1, 2, whereby a resolution n-times higher than that of a prior art can be obtained. In this manner, the part where an outline is inclined in the main scanning direction can be ideally smoothed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、多数の端面発光型EL
素子が主走査方向に配列されたラインヘッドにより感光
体に静電潜像を形成する端面発光型露光装置に関する。
BACKGROUND OF THE INVENTION The present invention relates to a large number of edge emitting ELs.
The present invention relates to an edge-emitting type exposure apparatus that forms an electrostatic latent image on a photoconductor by a line head in which elements are arranged in the main scanning direction.

【0002】[0002]

【従来の技術】近来、多数の端面発光型EL(エレクト
ロ・ルミネセンス)素子を主走査方向に配列してなるラ
インヘッドを感光体に対向配置し、この感光体の外周面
を帯電させ、その帯電部分にラインヘッドの各端面発光
型EL素子から光を照射することにより画像(静電潜
像)を形成し、その画像を現像して用紙に転写するライ
ンプリンタが開発されている。このラインヘッドの端面
発光型EL素子は、活性元素を含む硫化亜鉛等からなる
薄膜状の活性層を誘電体で囲み、この誘電体の両面に電
極を形成したもので、従来の他の発光素子より発光強度
が極めて高く、かつ、応答性が速い特性を有している。
2. Description of the Related Art Recently, a line head composed of a large number of edge emitting EL (electroluminescence) elements arranged in the main scanning direction is arranged opposite to a photoconductor, and the outer peripheral surface of the photoconductor is charged, A line printer has been developed in which an image (electrostatic latent image) is formed by irradiating the charged portion with light from each of the edge emitting EL elements of the line head, and the image is developed and transferred to a sheet. The edge emitting EL device of this line head is a device in which a thin film active layer made of zinc sulfide or the like containing an active element is surrounded by a dielectric, and electrodes are formed on both surfaces of this dielectric. It has characteristics of extremely high emission intensity and fast response.

【0003】図4は印字データに基づく画像の一部を示
すもので、斜線で示された領域が画像である。1画素の
主走査方向の大きさをx、副走査方向の大きさをyとす
ると、端面発光型EL素子の主走査方向の幅はxに対応
され、厚さはその複数分の1である。したがって、感光
体を回転させる過程で一つの端面発光型EL素子を複数
回発光させることにより1画素の画像が形成される。す
なわち、一つの端面発光型EL素子を1回発光させるこ
とにより形成される画像を画素構成要素とすれば、副走
査方向の大きさをy’、主走査方向の長さをxとする偏
平な画素構成要素を副走査方向に複数回形成することに
より1画素が構成される。
FIG. 4 shows a part of the image based on the print data, and the shaded area is the image. When the size of one pixel in the main scanning direction is x and the size in the sub-scanning direction is y, the width of the edge emitting EL element in the main scanning direction corresponds to x, and the thickness thereof is a fraction thereof. . Therefore, an image of one pixel is formed by causing one edge emitting EL element to emit light a plurality of times in the process of rotating the photoconductor. That is, if an image formed by causing one edge-emitting EL element to emit light once is used as a pixel constituent element, a flat surface having a size in the sub-scanning direction as y ′ and a length in the main scanning direction as x is flat. One pixel is formed by forming pixel constituent elements a plurality of times in the sub-scanning direction.

【0004】[0004]

【発明が解決しようとする課題】感光体に形成された画
像の輪郭を示すアウトラインが主走査方向と平行な場
合、或いは、副走査方向と平行な場合は画像の輪郭を示
すアウトラインの解像度を高めることができるが、主走
査方向に対するアウトラインLの角度が大きくなると、
アウトラインLの外側にはみ出す画像領域が多くなり、
本来アウトラインLの内側において画像領域である部分
の空白領域が多くなり、アウトラインLに対して凹凸が
多くなり、ジャギーが目立つ問題がある。
When the outline showing the contour of the image formed on the photoconductor is parallel to the main scanning direction, or when it is parallel to the sub-scanning direction, the resolution of the outline showing the contour of the image is increased. However, if the angle of the outline L with respect to the main scanning direction becomes large,
The image area that extends outside the outline L increases,
There is a problem in that there are many blank areas that are originally image areas inside the outline L, and there are many irregularities with respect to the outline L, and jaggies are conspicuous.

【0005】[0005]

【課題を解決するための手段】本発明は、主走査方向の
幅より副走査方向の厚さが小さい偏平な多数の端面発光
型EL素子を主走査方向に配列してなるn個のラインヘ
ッドを設け、これらのラインヘッドを主走査方向にnな
る寸法分ずらして平行に並べて感光体に対向配置した。
According to the present invention, there are provided n line heads in which a large number of flat edge emitting EL elements having a thickness smaller in the sub-scanning direction than in the main scanning direction are arranged in the main scanning direction. Are provided, and these line heads are aligned in parallel in the main scanning direction by a distance of n to face the photoconductor.

【0006】[0006]

【作用】画像の輪郭を示すアウトラインが主走査方向に
対して傾斜する部分においては、n個のラインヘッドの
端面発光型EL素子からの光によって画素構成要素を主
走査方向にずらして重ねることにより、n倍の解像度を
得ることができ、これにより、アウトラインが主走査方
向に対して傾斜する部分を滑らかにスムージングするこ
とができる。
In the portion where the outline showing the contour of the image is inclined with respect to the main scanning direction, the pixel components are shifted in the main scanning direction by the light from the edge emitting EL elements of the n line heads to overlap each other. , N times the resolution can be obtained, whereby the portion where the outline is inclined with respect to the main scanning direction can be smoothly smoothed.

【0007】[0007]

【実施例】本発明の一実施例を図1ないし図3に基づい
て説明する。図1に示すように、二つのラインヘッド
1,2が感光体3に対向して並設されている。これらの
ラインヘッド1,2は、図2に示すように多数の端面発
光型EL素子4を主走査方向に配列することにより形成
されている。また、これらのラインヘッド1,2の端面
発光型EL素子4の主走査方向の長さはx、副走査方向
の厚さはy’に定められている。そして、ラインヘッド
1,2は端面発光型EL素子4が主走査方向に対して互
いにx/2分ずれるように配列されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, two line heads 1 and 2 are arranged side by side facing the photoconductor 3. These line heads 1 and 2 are formed by arranging a large number of edge emitting EL elements 4 in the main scanning direction as shown in FIG. The lengths of the edge emitting EL elements 4 of the line heads 1 and 2 in the main scanning direction are set to x and the thickness in the sub scanning direction is set to y '. Then, the line heads 1 and 2 are arranged such that the edge emitting EL elements 4 are displaced from each other by x / 2 with respect to the main scanning direction.

【0008】このような構成において、感光体3を回転
させる過程で、この感光体3の外周面に帯電器から電荷
を印加して帯電させ、この帯電部分にラインヘッド1,
2の端面発光型EL素子4から光を照射することによ
り、感光体3の外周面に画像(静電潜像)が形成され
る。ここで、図3に示すように、一つの端面発光型EL
素子4を1回発光させた時に形成される画素構成要素の
大きさはxとy’との積であり、一つの端面発光型EL
素子4を複数回発光させることにより、xとyとの積で
表わされる1画素が形成される。このようにして感光体
3の外周面に形成された画像は、図示しないが現像器に
より現像され、その現像画像は転写器により用紙に転写
される。
In such a structure, in the process of rotating the photoconductor 3, charges are applied to the outer peripheral surface of the photoconductor 3 from the charger to charge the line head 1,
An image (electrostatic latent image) is formed on the outer peripheral surface of the photoconductor 3 by irradiating light from the edge emitting EL device 4 of No. 2. Here, as shown in FIG. 3, one edge emitting EL
The size of the pixel constituent element formed when the element 4 emits light once is the product of x and y ', and one edge emitting EL
By making the element 4 emit light a plurality of times, one pixel represented by the product of x and y is formed. The image thus formed on the outer peripheral surface of the photoconductor 3 is developed by a developing device (not shown), and the developed image is transferred to a sheet by the transfer device.

【0009】感光体2の外周面への画像形成に際し、画
像の輪郭を示すアウトラインが主走査方向と平行な場
合、或いは、副走査方向と平行な場合は、ラインヘッド
1,2の一方から光を照射することにより画像を形成す
ることができるが、画像の輪郭を示すアウトラインLが
主走査方向に対して傾斜する部分においては、A、B、
Cに示す領域においてはラインヘッド1の端面発光型E
L素子4から光を照射し、ABに重なる領域A’及びB
Cに重なる領域B’においてはラインヘッド2の端面発
光型EL素子4から光を照射する。ここで、右上がりの
斜線によって示された領域は一方のラインヘッド1によ
る画像であり、左上がりの斜線によって示された領域は
他方のラインヘッド2による画像である。
In forming an image on the outer peripheral surface of the photoconductor 2, when the outline showing the outline of the image is parallel to the main scanning direction or parallel to the sub scanning direction, light is emitted from one of the line heads 1 and 2. It is possible to form an image by irradiating with, but in the portion where the outline L indicating the outline of the image is inclined with respect to the main scanning direction, A, B,
In the area indicated by C, the edge emitting type E of the line head 1
Light is emitted from the L element 4 to overlap areas AB and A'and B
In the area B ′ overlapping with C, light is emitted from the edge emitting EL element 4 of the line head 2. Here, the area shown by the diagonal line rising to the right is an image by one line head 1, and the area shown by the diagonal line rising to the left is an image by the other line head 2.

【0010】このように、ラインヘッド1,2の端面発
光型EL素子4からの光によって画素構成要素を主走査
方向にずらして重ねることにより、2倍の解像度を得る
ことができ、これにより、画像の輪郭を示すアウトライ
ンLが主走査方向に対して傾斜する部分を滑らかにスム
ージングすることができる。
As described above, the pixel components are shifted in the main scanning direction by the light emitted from the edge emitting EL elements 4 of the line heads 1 and 2 so as to be overlapped with each other, so that a double resolution can be obtained. It is possible to smoothly smooth the portion where the outline L indicating the contour of the image is inclined with respect to the main scanning direction.

【0011】なお、図1に示すように、ラインヘッド
1,2からの光は感光体3の副走査方向(回転方向)の
同一位置に照射されるが、ラインヘッド1,2から感光
体3への光の照射位置を副走査方向にずらしてもよい。
この場合にはラインヘッド1,2の発光タイミングをず
らすことにより、同様の目的を達成することができる。
また、ラインヘッドを3個以上並設してもよい。
As shown in FIG. 1, light from the line heads 1 and 2 is applied to the same position in the sub-scanning direction (rotational direction) of the photoconductor 3, but from the line heads 1 and 2 to the photoconductor 3. The irradiation position of light on the light may be shifted in the sub-scanning direction.
In this case, the same purpose can be achieved by shifting the light emission timings of the line heads 1 and 2.
Further, three or more line heads may be arranged in parallel.

【0012】[0012]

【発明の効果】本発明は、主走査方向の幅より副走査方
向の厚さが小さい偏平な多数の端面発光型EL素子を主
走査方向に配列してなるn個のラインヘッドを設け、こ
れらのラインヘッドを主走査方向にnなる寸法分ずらし
て平行に並べて感光体に対向配置したので、画像の輪郭
を示すアウトラインが主走査方向に対して傾斜する部分
においては、n個のラインヘッドの端面発光型EL素子
からの光によって画素構成要素を主走査方向にずらして
重ねることにより、n倍の解像度を得ることができ、こ
れにより、アウトラインが主走査方向に対して傾斜する
部分を滑らかにスムージングすることができる効果を有
する。
According to the present invention, there are provided n line heads in which a large number of flat edge emitting EL elements having a thickness smaller in the sub-scanning direction than in the main scanning direction are arranged in the main scanning direction. The line heads are arranged in parallel in the main scanning direction by a distance of n, and are arranged in opposition to the photoconductor. Therefore, in the portion where the outline showing the contour of the image is inclined with respect to the main scanning direction, By shifting the pixel constituent elements in the main scanning direction and overlapping them by the light from the edge emitting EL element, it is possible to obtain n times the resolution, and thereby smooth the part where the outline is inclined with respect to the main scanning direction. Has the effect of being smoothed.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示す側面図である。FIG. 1 is a side view showing an embodiment of the present invention.

【図2】その並設されたラインヘッドの正面図である。FIG. 2 is a front view of the line heads arranged side by side.

【図3】その感光体上に形成された画像の一部を示す説
明図である。
FIG. 3 is an explanatory diagram showing a part of an image formed on the photoconductor.

【図4】感光体上に形成された従来の画像の一部を示す
説明図である。
FIG. 4 is an explanatory diagram showing a part of a conventional image formed on a photoconductor.

【符号の説明】[Explanation of symbols]

1,2 ラインヘッド 3 感光体 4 端面発光型EL素子 1, 2 line head 3 photoconductor 4 edge emitting EL element

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 主走査方向の幅より副走査方向の厚さが
小さい偏平な多数の端面発光型EL素子を主走査方向に
配列してなるn個のラインヘッドを設け、これらのライ
ンヘッドを主走査方向にnなる寸法分ずらして平行に並
べて感光体に対向配置したことを特徴とする端面発光型
露光装置。
1. An n number of line heads, each of which is formed by arranging a number of flat end-face emitting EL elements having a thickness smaller in the sub-scanning direction than a width in the main scanning direction in the main scanning direction, are provided. An edge-emitting type exposure apparatus characterized in that they are arranged parallel to each other by being shifted by a dimension of n in the main scanning direction and are arranged to face a photoconductor.
JP23437191A 1991-09-13 1991-09-13 End face emitting-type light exposing device Pending JPH0569591A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23437191A JPH0569591A (en) 1991-09-13 1991-09-13 End face emitting-type light exposing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23437191A JPH0569591A (en) 1991-09-13 1991-09-13 End face emitting-type light exposing device

Publications (1)

Publication Number Publication Date
JPH0569591A true JPH0569591A (en) 1993-03-23

Family

ID=16969962

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23437191A Pending JPH0569591A (en) 1991-09-13 1991-09-13 End face emitting-type light exposing device

Country Status (1)

Country Link
JP (1) JPH0569591A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09277599A (en) * 1996-04-15 1997-10-28 Nec Corp Electrophotographic printer
US6118463A (en) * 1997-03-19 2000-09-12 Fujitsu Limited Positional error correction for color image forming apparatus
US7002613B2 (en) * 2002-09-06 2006-02-21 Heidelberger Druckmaschinen Ag Method for printing an image on a printing substrate and device for inputting energy to a printing-ink carrier
US11194265B2 (en) 2020-03-20 2021-12-07 Toshiba Tec Kabushiki Kaisha Image forming apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09277599A (en) * 1996-04-15 1997-10-28 Nec Corp Electrophotographic printer
US6118463A (en) * 1997-03-19 2000-09-12 Fujitsu Limited Positional error correction for color image forming apparatus
US7002613B2 (en) * 2002-09-06 2006-02-21 Heidelberger Druckmaschinen Ag Method for printing an image on a printing substrate and device for inputting energy to a printing-ink carrier
US11194265B2 (en) 2020-03-20 2021-12-07 Toshiba Tec Kabushiki Kaisha Image forming apparatus

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