JPH1148526A - Optical printer head - Google Patents
Optical printer headInfo
- Publication number
- JPH1148526A JPH1148526A JP20689797A JP20689797A JPH1148526A JP H1148526 A JPH1148526 A JP H1148526A JP 20689797 A JP20689797 A JP 20689797A JP 20689797 A JP20689797 A JP 20689797A JP H1148526 A JPH1148526 A JP H1148526A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- light
- emitting element
- base plate
- lens
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
- B41J2/45—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using light-emitting diode [LED] or laser arrays
- B41J2/451—Special optical means therefor, e.g. lenses, mirrors, focusing means
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Facsimile Heads (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Abstract
(57)【要約】
【課題】発光素子アレイの配列と直交する方向に配され
た遮光壁でもって反射した光の一部がレンズを介して感
光体に直接、照射され、ゴースト像を形成することがあ
った。
【解決手段】ベースプレート１の上面もしくは下面に、
多数の発光素子２ａが直線状に配列された発光素子アレ
イ２を複数個、列状に配置させるとともに、該ベースプ
レート１の上方に前記発光素子アレイ２と１対１に対応
する複数個のレンズ１から成るレンズ列を配設させて成
る光プリンタヘッドにおいて、前記ベースプレート１と
レンズ列との間に、各発光素子アレイ２の発光素子２ａ
が発する光をそれに対応するレンズ３のみに入射される
ように、入射限界線に対応する窓孔ｗを有し、それら窓
孔ｗが重なり合うような位置関係に配置された少なくと
も２枚の遮光板４ａ，４ｂを前記ベースプレート１と略
平行に配設する。
(57) [PROBLEMS] To form a ghost image by irradiating a part of light reflected by a light shielding wall arranged in a direction orthogonal to an arrangement of a light emitting element array directly to a photoreceptor via a lens. There was something. An upper surface or a lower surface of a base plate 1 is provided.
A plurality of light emitting element arrays 2 in which a large number of light emitting elements 2a are linearly arranged are arranged in a row, and a plurality of lenses 1 corresponding to the light emitting element arrays 2 on a one-to-one basis above the base plate 1. In an optical printer head having a lens array composed of: a light emitting element 2a of each light emitting element array 2 between the base plate 1 and the lens row.
Have at least two light shielding plates arranged in a positional relationship such that the window holes w overlap each other so that the light emitted by the light source enters only the corresponding lens 3. 4a and 4b are disposed substantially parallel to the base plate 1.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電子写真プリンタ等
の露光手段として組み込まれる固体走査方式の光プリン
タヘッドに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-scanning optical printer head incorporated as an exposure means for an electrophotographic printer or the like.
【０００２】[0002]
【従来の技術】従来の光プリンタヘッドは、例えば図４
に示す如く、ガラス等から成るベースプレート１１の下
面に、多数の発光素子が一定のピッチで配列された発光
素子アレイ１２を複数個、直線状に配列・実装させると
ともに、前記ベースプレート１１の上方に複数個のレン
ズ１３を前記発光素子アレイ１２と１対１に対応させて
配設した構造を有しており、前記発光素子アレイ１２の
各発光素子を外部からの印画信号に対応させて個々に選
択的に発光させるとともに、該発光した光（ビーム）を
対応するレンズ１３を介して外部の感光体Ｐに結像さ
せ、感光体面Ｐに所定の潜像を形成することによって光
プリンタヘッドとして機能する。2. Description of the Related Art A conventional optical printer head is, for example, shown in FIG.
As shown in FIG. 1, a plurality of light emitting element arrays 12 in which a large number of light emitting elements are arranged at a fixed pitch are linearly arranged and mounted on a lower surface of a base plate 11 made of glass or the like, and a plurality of light emitting element arrays 12 are arranged above the base plate 11. It has a structure in which a plurality of lenses 13 are arranged in a one-to-one correspondence with the light emitting element array 12, and each light emitting element of the light emitting element array 12 is individually selected according to an external printing signal. The light (beam) thus emitted is focused on an external photoconductor P via a corresponding lens 13 to form a predetermined latent image on the photoconductor surface P, thereby functioning as an optical printer head. .
【０００３】尚、前記ベースプレート１１と複数個のレ
ンズ１３との間の領域には、発光素子アレイ１２の配列
と直交する方向に壁面を有する遮光壁１４が設けられて
おり、この遮光壁１４でもって各レンズ１３に入射する
光が対応する発光素子アレイ１２の発光素子の発する光
のみとなるようにしていた。In a region between the base plate 11 and the plurality of lenses 13, a light-shielding wall 14 having a wall surface in a direction perpendicular to the arrangement of the light-emitting element array 12 is provided. Thus, the light incident on each lens 13 is only the light emitted from the corresponding light emitting element of the light emitting element array 12.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、この従
来の光プリンタヘッドにおいては、前記遮光壁１４が発
光素子アレイ１２の配列と直交する方向に配されてお
り、該遮光壁１４で反射した光の一部（例えば図中の反
射光ｘ）がレンズ１３を介して感光体Ｐに直接、照射さ
れることがあった。この場合、感光体Ｐには前述の反射
光ｘによるゴースト像が形成されてしまい、感光体Ｐ上
に所定の潜像を形成することが不可となる欠点を有して
いた。However, in this conventional optical printer head, the light shielding wall 14 is arranged in a direction orthogonal to the arrangement of the light emitting element array 12, and the light reflected by the light shielding wall 14 is A part (for example, the reflected light x in the drawing) may be directly irradiated on the photoconductor P via the lens 13. In this case, a ghost image is formed on the photoconductor P due to the above-mentioned reflected light x, and there is a disadvantage that a predetermined latent image cannot be formed on the photoconductor P.
【０００５】[0005]
【課題を解決するための手段】本発明は上記欠点に鑑み
案出されたもので、本発明の光プリンタヘッドは、ベー
スプレートの上面もしくは下面に、多数の発光素子が直
線状に配列された発光素子アレイを複数個、列状に配置
させるとともに、該ベースプレートの上方に前記発光素
子アレイと１対１に対応する複数個のレンズから成るレ
ンズ列を配設させて成る光プリンタヘッドにおいて、前
記ベースプレートとレンズ列との間に、各発光素子アレ
イの発光素子が発する光をそれに対応するレンズのみに
入射されるように、入射限界線に対応する窓孔を有し、
それら窓孔が重なり合うような位置関係に配置された少
なくとも２枚の遮光板を前記ベースプレートと略平行に
配設したことを特徴とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and an optical printer head according to the present invention has a light emitting device in which a large number of light emitting elements are linearly arranged on an upper surface or a lower surface of a base plate. An optical printer head comprising: a plurality of element arrays arranged in a row; and a lens row including a plurality of lenses corresponding to the light emitting element array in a one-to-one correspondence with the light emitting element array disposed above the base plate. And between the lens row, so that the light emitted from the light emitting element of each light emitting element array is incident only on the corresponding lens, has a window hole corresponding to the incident limit line,
At least two light-shielding plates arranged in such a positional relationship as to overlap the window holes are arranged substantially parallel to the base plate.
【０００６】[0006]
【発明の実施の形態】以下、本発明を添付図面に基づき
各形態毎に詳細に説明する。図１は本発明の光プリンタ
ヘッドの一形態を示す縦断面図、図２は図１の部分拡大
図であり、１はベースプレート、２は発光素子アレイ、
３はレンズ、４ａ，４ｂは遮光板、ｗは遮光板４ａ，４
ｂに設けた窓孔である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below for each embodiment with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of the optical printer head of the present invention, FIG. 2 is a partially enlarged view of FIG. 1, 1 is a base plate, 2 is a light emitting element array,
3 is a lens, 4a and 4b are light shielding plates, w is light shielding plates 4a and 4
It is a window hole provided in b.
【０００７】前記ベースプレート１は、例えばホウケイ
酸ガラスやソーダガラス，石英，サファイア，結晶化ガ
ラス等から成る透明基板の下面に複数個の配線導体（図
示せず）を所定のパターンでもって被着させて成り、そ
の下面には複数個の発光素子アレイ２が取着・配列され
る。The base plate 1 has a plurality of wiring conductors (not shown) adhered in a predetermined pattern to a lower surface of a transparent substrate made of, for example, borosilicate glass, soda glass, quartz, sapphire, crystallized glass, or the like. A plurality of light emitting element arrays 2 are attached and arranged on the lower surface.
【０００８】前記複数個の発光素子アレイ２は、その各
々が直線状に配列された多数の発光素子により構成され
ており、各アレイ２の発光面が前記ベースプレート１と
対面するようにしてベースプレート１の下面にそれぞれ
取着される。Each of the plurality of light emitting element arrays 2 is composed of a large number of light emitting elements, each of which is arranged linearly, and the light emitting surface of each array 2 faces the base plate 1 so that the base plate 1 Are respectively attached to the lower surfaces of the.
【０００９】これら複数個の発光素子アレイ２は、図示
しないドライバーＩＣ等によって発光制御されており、
ベースプレート下面の配線導体等を介して発光素子アレ
イ２に外部電源からの電力が供給されると、各発光素子
２ａが印画信号に基づいて個々に選択的に発光し、該発
光した光を後述するレンズ３を介して外部の感光体Ｐに
照射させることによって感光体面Ｐに潜像を形成するよ
うになっている。The plurality of light emitting element arrays 2 are controlled to emit light by a driver IC or the like (not shown).
When power from an external power supply is supplied to the light emitting element array 2 via a wiring conductor or the like on the lower surface of the base plate, each light emitting element 2a selectively emits light individually based on a print signal, and the emitted light will be described later. A latent image is formed on the photoconductor surface P by irradiating the external photoconductor P via the lens 3.
【００１０】このような発光素子アレイ２としては、例
えば６４個の発光ダイオード素子を直線状に配列させて
成るＬＥＤアレイ等が用いられ、該ＬＥＤアレイは、例
えば、まずＧａＡｓの基板を炉中にて高温に加熱すると
ともにＡｓＨ3 （アルシン）とＰＨ3 （ホスヒン）とＧ
ａ（ガリウム）を適量に含むガスを接触させて基板表面
にｎ型半導体のＧａＡｓＰ（ガリウム−砒素−リン）の
単結晶を成長させ、次にＧａＡｓＰ単結晶表面にＳｉ3
Ｈ4 （窒化珪素）の窓付膜を被着させるとともに該窓孔
にＺｎ（亜鉛）のガスをさらし、ｎ型半導体のＧａＡｓ
Ｐ単結晶の一部にＺｎを拡散させてｐ型半導体を形成
し、ｐｎ接合をもたすことによって作製される。As the light emitting element array 2, for example, an LED array formed by linearly arranging 64 light emitting diode elements is used. For example, the LED array is prepared by first placing a GaAs substrate in a furnace. AsH 3 (arsine), PH 3 (phosphine) and G
a n-type semiconductor of GaAsP on the substrate surface by contacting the gas containing (gallium) in a suitable amount (gallium - arsenic - phosphorus) is grown single crystal, then Si 3 in GaAsP monocrystalline surface
An H 4 (silicon nitride) film with a window is deposited and the window hole is exposed to a gas of Zn (zinc) to form a GaAs n-type semiconductor.
It is manufactured by diffusing Zn into a part of a P single crystal to form a p-type semiconductor and having a pn junction.
【００１１】尚、前記発光素子アレイ２は、例えばＡ４
サイズ、３００ｄｐｉの光プリンタヘッドを構成する場
合、６４個の発光素子２ａを一単位とした５０８ｄｐｉ
の発光素子アレイ２を４０個使用し、これらをベースプ
レート１の下面にフリップチップ実装すること、具体的
には、発光素子アレイ２の上面に設けられる多数の端子
電極をベースプレート１上の配線導体に半田等のロウ材
や異方性導電ペースト等を介して電気的・機械的に接続
させることによりベースプレート１の下面に取着され
る。The light emitting element array 2 is, for example, A4
When an optical printer head having a size of 300 dpi is configured, 508 dpi using 64 light emitting elements 2a as one unit
40 light emitting element arrays 2 are used, and these are flip-chip mounted on the lower surface of the base plate 1. Specifically, a large number of terminal electrodes provided on the upper surface of the light emitting element array 2 are used as wiring conductors on the base plate 1. It is attached to the lower surface of the base plate 1 by being electrically and mechanically connected via a brazing material such as solder or an anisotropic conductive paste.
【００１２】また前記発光素子アレイ２が下面に取着さ
れたベースプレート１の上方には、発光素子アレイ２と
１対１に対応する複数個のレンズ３から成るレンズ列が
配設されている。Above the base plate 1 on which the light emitting element array 2 is mounted on the lower surface, a lens array composed of a plurality of lenses 3 corresponding to the light emitting element array 2 on a one-to-one basis is provided.
【００１３】前記レンズ３は、その光軸が対応する発光
素子アレイ２のほぼ中央に位置するよう配されており、
発光素子アレイ２の各発光素子２ａの発する光を所定の
倍率で拡大し、これらを感光体面Ｐに照射・結像させる
作用を為す。The lens 3 is arranged so that its optical axis is located substantially at the center of the corresponding light emitting element array 2.
The light emitted from each light emitting element 2a of the light emitting element array 2 is enlarged at a predetermined magnification, and the light is irradiated and imaged on the photoconductor surface P.
【００１４】このような複数個のレンズ３は、アクリル
樹脂やポリカーボネイト樹脂等の透明樹脂を射出成形し
たり、或いはガラス等の透光性無機物を加熱プレス成形
することによって製作され、液晶ポリマー等で形成され
る図示しないレンズプレートやハウジング等によってベ
ースプレート１から所定の距離だけ離れた位置に固定さ
れる。The plurality of lenses 3 are manufactured by injection molding a transparent resin such as an acrylic resin or a polycarbonate resin, or by press-molding a transparent inorganic material such as a glass, and are made of a liquid crystal polymer or the like. It is fixed at a position separated from the base plate 1 by a predetermined distance by a lens plate, a housing and the like (not shown) to be formed.
【００１５】またこのようなレンズ３としては、例え
ば、５０８ｄｐｉのＬＥＤアレイを４０個用いてＡ４サ
イズ、３００ｄｐｉの光プリンタヘッドを構成する場
合、倍率１．６９２倍の非球面レンズが使用され、これ
を２３．２８ｍｍの焦点距離に設定して用いる。For example, when an A4 size, 300 dpi optical printer head is formed by using 40 508 dpi LED arrays, an aspherical lens having a magnification of 1.692 times is used as the lens 3. Is set at a focal length of 23.28 mm.
【００１６】尚、これら複数個のレンズ３の近傍には、
各レンズ３に入射する光の量を調整するための絞り部材
５が配置され、この絞り部材５によってレンズ３の有効
径が決定される。In the vicinity of the plurality of lenses 3,
A stop member 5 for adjusting the amount of light incident on each lens 3 is arranged, and the effective diameter of the lens 3 is determined by the stop member 5.
【００１７】そして、前記ベースプレート１と複数個の
レンズ３との間には、各発光素子アレイ２の発光素子２
ａが発する光をそれに対応するレンズ３のみに入射され
るように、入射限界線に対応する窓孔ｗを有し、それら
窓孔ｗが重なり合うような位置関係に配置された２枚の
遮光板４ａ，４ｂがベースプレート１と略平行に配設し
てある。A light emitting element 2 of each light emitting element array 2 is provided between the base plate 1 and the plurality of lenses 3.
The two light shielding plates are provided with window holes w corresponding to the incident limit line so that the light emitted from the light source a is incident only on the lens 3 corresponding thereto, and are arranged in a positional relationship such that the window holes w overlap. 4a and 4b are disposed substantially parallel to the base plate 1.
【００１８】前記遮光板４ａ，４ｂは、その各々が厚み
０．０１ｍｍ〜０．５ｍｍの金属板（ＳＵＳ，リン青
銅，鉄，アルミニウム）やプラスチックフィルム（ポリ
イミド，ポリエステル，液晶ポリマー）によって形成さ
れており、この２枚の遮光板４ａ，４ｂでもって他の発
光素子アレイ２からの不要な光がレンズ３に入射するの
を確実に防止している。The light shielding plates 4a and 4b are each formed of a metal plate (SUS, phosphor bronze, iron, aluminum) or a plastic film (polyimide, polyester, liquid crystal polymer) having a thickness of 0.01 mm to 0.5 mm. In addition, the two light shielding plates 4a and 4b reliably prevent unnecessary light from the other light emitting element array 2 from being incident on the lens 3.
【００１９】また前記遮光板４ａ，４ｂは、前述した通
り、ベースプレート１と略平行に配置されていることか
ら、遮光板４ａ，４ｂに当たった光は全て下方に反射さ
れようになっており、これらの反射光ｘが直接、感光体
Ｐに照射されることは一切ない。従って、感光体面Ｐに
前述の反射光ｘによるゴースト像が形成されることはな
く、感光体面Ｐに良好で鮮明な所定の潜像を形成するこ
とが可能となる。Since the light shielding plates 4a and 4b are arranged substantially parallel to the base plate 1 as described above, all light hitting the light shielding plates 4a and 4b is reflected downward. The reflected light x does not directly irradiate the photoconductor P at all. Therefore, the ghost image due to the above-mentioned reflected light x is not formed on the photoconductor surface P, and a good and clear predetermined latent image can be formed on the photoconductor surface P.
【００２０】更に前記遮光板４ａ，４ｂは、その厚みを
０．０１〜０．５ｍｍとなしておくことにより、遮光板
自体の機械的強度を十分なレベルに保ちつつ、発光素子
２ａの光が窓孔ｗの内壁に当たってレンズ３側に反射す
るのを有効に防止することができる。従って遮光板４
ａ，４ｂの厚みは０．０１ｍｍ〜０．５ｍｍの範囲内に
設定するのが好ましい。The light shielding plates 4a and 4b have a thickness of 0.01 to 0.5 mm, so that the light of the light emitting element 2a can be maintained while maintaining the mechanical strength of the light shielding plates themselves at a sufficient level. It can be effectively prevented that the light hits the inner wall of the window w and reflects toward the lens 3. Therefore, the light shielding plate 4
The thicknesses of a and 4b are preferably set in the range of 0.01 mm to 0.5 mm.
【００２１】尚、このような遮光板４ａ，４ｂは、図２
に示す如く、発光素子アレイ２から対応するレンズ３へ
の２本の入射限界線ａ1 ，ａ2 が同一の窓孔ｗ内を通過
し、かつ発光素子アレイ２から隣のレンズ３への２本の
入射限界線ｂ1 ，ｂ2 が２枚の遮光板４ａ，４ｂのいず
れかと交差もしくは接触するように配置される。ここで
入射限界線ａ1 ，ａ2 とは各発光素子アレイ２の両端に
位置する２つの発光素子２ａから対応するレンズ３に直
接、入射する光の経路を表したもので、また入射限界線
ｂ1 ，ｂ2 とは隣接する発光素子アレイ間に光を遮るも
のが何も存在しない場合に発光素子アレイ２の両端に位
置する発光素子２ａから隣のレンズ３に直接、入射する
光の経路を表したものである。Incidentally, such light shielding plates 4a and 4b are provided in FIG.
As shown in the figure, two incident limit lines a 1 and a 2 from the light emitting element array 2 to the corresponding lens 3 pass through the same window w, and the two incident limit lines a 1 and a 2 from the light emitting element array 2 to the adjacent lens 3. The two incident limit lines b 1 and b 2 are arranged so as to intersect or contact one of the two light shielding plates 4a and 4b. Here, the incident limit lines a 1 and a 2 represent the paths of light that directly enters the corresponding lens 3 from the two light emitting elements 2 a located at both ends of each light emitting element array 2. b 1 and b 2 are paths of light that directly enters the adjacent lens 3 from the light emitting elements 2 a located at both ends of the light emitting element array 2 when there is nothing blocking light between the adjacent light emitting element arrays. Is represented.
【００２２】また前記遮光板４ａ，４ｂは、前述の金属
板やプラスチックフィルムの所定箇所に従来周知のケミ
カルエッチングやレーザー加工、或いはプレス加工等に
よって遮光板４ａの窓孔ｗが遮光板４ｂの窓孔ｗよりも
小さく形成されるようにして孔明け加工することによっ
て極めて高精度かつ容易に製作され、得られた遮光板４
ａ，４ｂを図３のようなハウジング部材６の溝部６ａに
取着させることによってベースプレート１と略平行に保
持される。The light shielding plates 4a and 4b are formed at predetermined positions on the above-mentioned metal plate or plastic film by a conventionally known chemical etching, laser processing, press working, or the like so that a window hole w of the light shielding plate 4a is formed in the window of the light shielding plate 4b. The light-shielding plate 4 is manufactured with extremely high precision and ease by drilling so as to be formed smaller than the hole w.
The base plate 1 is held substantially parallel to the base plate 1 by attaching a and 4b to the groove 6a of the housing member 6 as shown in FIG.
【００２３】かくして上述した光プリンタヘッドは、発
光素子アレイ２の各発光素子２ａを外部からの印画信号
に基づいて個々に選択的に発光させるとともに、該発光
した光（ビーム）をベースプレート１及びレンズ３を介
して外部の感光体Ｐに結像させ、感光体面Ｐに所定の潜
像を形成することによって光プリンタヘッドとして機能
する。Thus, the above-described optical printer head selectively and individually emits each of the light emitting elements 2a of the light emitting element array 2 based on an external printing signal, and emits the emitted light (beam) to the base plate 1 and the lens. By forming an image on an external photoconductor P via a photoconductor 3 and forming a predetermined latent image on the photoconductor surface P, the device functions as an optical printer head.
【００２４】尚、本発明は上述の形態に限定されるもの
ではなく、本発明の要旨を逸脱しない範囲において種々
の変更、改良等が可能であり、例えば、上述の形態では
発光素子アレイをベースプレートの下面に取着させるよ
うにしたが、これに代えて発光素子アレイをベースプレ
ートの上面に取着させるようにしても良い。It should be noted that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the spirit of the present invention. The light emitting element array may be attached to the upper surface of the base plate instead of the lower surface.
【００２５】また上述の形態では隣接する発光素子アレ
イからの光を２枚の遮光板によって遮断するようにした
が、３枚以上の遮光板を用いて遮断するようにしても構
わない。In the above-described embodiment, the light from the adjacent light emitting element array is blocked by the two light shielding plates. However, the light may be blocked by using three or more light shielding plates.
【００２６】更に上述の形態では本発明の光プリンタヘ
ッドをＬＥＤプリンタヘッドに適用した場合を例にとっ
たが、それ以外の光プリンタヘッド、例えばＥＬヘッ
ド、プラズマドットヘッド、液晶シャッタヘッド、蛍光
ヘッド、ＰＬＺＴ等にも適用が可能である。Further, in the above embodiment, the case where the optical printer head of the present invention is applied to an LED printer head is taken as an example. However, other optical printer heads, such as an EL head, a plasma dot head, a liquid crystal shutter head, a fluorescent head, etc. , PLZT and the like.
【００２７】[0027]
【発明の効果】本発明の光プリンタヘッドによれば、ベ
ースプレートとレンズ列との間に、各発光素子アレイの
発光素子が発する光をそれに対応するレンズのみに入射
されるように、入射限界線に対応する窓孔を有し、それ
ら窓孔が重なり合うような位置関係に配置された少なく
とも２枚の遮光板を前記ベースプレートと略平行に配設
したことから、他の発光素子アレイからの光がレンズに
直接、入射しようとするのを前記遮光板でもって遮断す
ることができる。しかも、前記遮光板はベースプレート
と略平行に配置されているため、遮光板に当たった光は
全て下方に反射されるようになっており、これらの反射
光が直接、感光体に照射されるのを確実に防止すること
ができる。従って、感光体面にゴースト像のない所定の
潜像を良好かつ鮮明に形成することが可能となる。According to the optical printer head of the present invention, the incidence limit line is provided between the base plate and the lens row so that the light emitted from the light emitting elements of each light emitting element array enters only the corresponding lens. Since at least two light-shielding plates arranged in a positional relationship such that the window holes overlap with each other are disposed substantially parallel to the base plate, light from other light-emitting element arrays An attempt to directly enter the lens can be blocked by the light shielding plate. In addition, since the light-shielding plate is arranged substantially parallel to the base plate, all the light hitting the light-shielding plate is reflected downward, and these reflected lights are directly applied to the photoconductor. Can be reliably prevented. Therefore, a predetermined latent image without a ghost image on the photoreceptor surface can be formed well and clearly.
【図１】本発明の光プリンタヘッドの一形態を示す縦断
面図である。FIG. 1 is a longitudinal sectional view showing one embodiment of an optical printer head of the present invention.
【図２】図１の部分拡大図である。FIG. 2 is a partially enlarged view of FIG.
【図３】遮光板をハウジング部材に取着させる際の組み
立て工程を示す斜視図である。FIG. 3 is a perspective view showing an assembling process when attaching a light-shielding plate to a housing member.
【図４】従来の光プリンタヘッドの縦断面図である。FIG. 4 is a longitudinal sectional view of a conventional optical printer head.
１・・・・・・ベースプレート ２・・・・・・発光素子アレイ ２ａ・・・・・発光素子 ３・・・・・・レンズ ４ａ，４ｂ・・遮光板 ｗ・・・・・・窓孔 DESCRIPTION OF SYMBOLS 1 ... Base plate 2 ... Light emitting element array 2a ... Light emitting element 3 ... Lens 4a, 4b ... Light shield plate w ... Window hole
Claims (1)
数の発光素子が直線状に配列された発光素子アレイを複
数個、列状に配置させるとともに、該ベースプレートの
上方に前記発光素子アレイと１対１に対応する複数個の
レンズから成るレンズ列を配設させて成る光プリンタヘ
ッドにおいて、前記ベースプレートとレンズ列との間
に、各発光素子アレイの発光素子が発する光をそれに対
応するレンズのみに入射されるように、入射限界線に対
応する窓孔を有し、それら窓孔が重なり合うような位置
関係に配置された少なくとも２枚の遮光板を前記ベース
プレートと略平行に配設したことを特徴とする光プリン
タヘッド。1. A plurality of light emitting element arrays in which a large number of light emitting elements are linearly arranged on an upper surface or a lower surface of a base plate, and a one-to-one correspondence with the light emitting element arrays above the base plate. In an optical printer head comprising a lens array comprising a plurality of lenses corresponding to (a), light emitted from the light emitting elements of each light emitting element array enters only the corresponding lens between the base plate and the lens row. As a result, at least two light-shielding plates arranged in a positional relationship such that the window holes overlap with each other are arranged substantially in parallel with the base plate. Optical printer head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20689797A JPH1148526A (en) | 1997-07-31 | 1997-07-31 | Optical printer head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20689797A JPH1148526A (en) | 1997-07-31 | 1997-07-31 | Optical printer head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1148526A true JPH1148526A (en) | 1999-02-23 |
Family
ID=16530878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20689797A Pending JPH1148526A (en) | 1997-07-31 | 1997-07-31 | Optical printer head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1148526A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2433837B (en) * | 2005-12-06 | 2008-12-17 | Enfis Ltd | Improved LED array |
| JP2008307885A (en) * | 2007-05-14 | 2008-12-25 | Seiko Epson Corp | Shielding member, line head, and image forming apparatus using the same |
| EP2012145A3 (en) * | 2007-07-06 | 2009-03-04 | Seiko Epson Corporation | A lens array, a line head and an image forming apparatus using the line head |
| JP2009196345A (en) * | 2008-01-21 | 2009-09-03 | Seiko Epson Corp | Line head and image forming apparatus |
| EP1992492A3 (en) * | 2007-05-14 | 2009-09-09 | Seiko Epson Corporation | A light shielding member, a line head and an image forming apparatus using the line head |
| EP2017085A3 (en) * | 2007-07-20 | 2009-09-16 | Seiko Epson Corporation | A line head and an image forming apparatus using the line head |
| JP2009216730A (en) * | 2008-03-06 | 2009-09-24 | Oki Data Corp | Exposure device, image forming apparatus and reading apparatus |
| US7719560B2 (en) * | 2006-10-26 | 2010-05-18 | Seiko Epson Corporation | Line head and imaging apparatus incorporating the same |
| US7787005B2 (en) * | 2007-01-26 | 2010-08-31 | Seiko Epson Corporation | Print head and image forming device using the same |
| US7791631B2 (en) * | 2007-02-02 | 2010-09-07 | Seiko Epson Corporation | Line head, an exposure method using the line head, an image forming apparatus, an image forming method and a line head adjustment method |
| US7916163B2 (en) | 2007-12-14 | 2011-03-29 | Seiko Epson Corporation | Exposure head, a method of controlling an exposure head and an image forming apparatus |
| CN101456297B (en) | 2007-12-14 | 2012-10-10 | 精工爱普生株式会社 | An exposure head and an image forming apparatus |
| CN101408748B (en) | 2007-07-20 | 2012-10-24 | 精工爱普生株式会社 | Line head and an image forming apparatus using the line head |
-
1997
- 1997-07-31 JP JP20689797A patent/JPH1148526A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2433837B (en) * | 2005-12-06 | 2008-12-17 | Enfis Ltd | Improved LED array |
| US7719560B2 (en) * | 2006-10-26 | 2010-05-18 | Seiko Epson Corporation | Line head and imaging apparatus incorporating the same |
| US7787005B2 (en) * | 2007-01-26 | 2010-08-31 | Seiko Epson Corporation | Print head and image forming device using the same |
| US7791631B2 (en) * | 2007-02-02 | 2010-09-07 | Seiko Epson Corporation | Line head, an exposure method using the line head, an image forming apparatus, an image forming method and a line head adjustment method |
| US7705869B2 (en) * | 2007-05-14 | 2010-04-27 | Seiko Epson Corporation | Light shielding member, a line head and an image forming apparatus using the line head |
| JP2008307885A (en) * | 2007-05-14 | 2008-12-25 | Seiko Epson Corp | Shielding member, line head, and image forming apparatus using the same |
| EP1992492A3 (en) * | 2007-05-14 | 2009-09-09 | Seiko Epson Corporation | A light shielding member, a line head and an image forming apparatus using the line head |
| US7764429B2 (en) | 2007-07-06 | 2010-07-27 | Seiko Epson Corporation | Lens array, A line head and an image forming apparatus using the line head |
| EP2012145A3 (en) * | 2007-07-06 | 2009-03-04 | Seiko Epson Corporation | A lens array, a line head and an image forming apparatus using the line head |
| US7760215B2 (en) | 2007-07-20 | 2010-07-20 | Seiko Epson Corporation | Line head and an image forming apparatus using the line head |
| EP2017085A3 (en) * | 2007-07-20 | 2009-09-16 | Seiko Epson Corporation | A line head and an image forming apparatus using the line head |
| CN101408748B (en) | 2007-07-20 | 2012-10-24 | 精工爱普生株式会社 | Line head and an image forming apparatus using the line head |
| US7916163B2 (en) | 2007-12-14 | 2011-03-29 | Seiko Epson Corporation | Exposure head, a method of controlling an exposure head and an image forming apparatus |
| EP2070709B1 (en) * | 2007-12-14 | 2011-11-23 | Seiko Epson Corporation | An exposure head, a method of controlling an exposure head and an image forming apparatus |
| CN101456297B (en) | 2007-12-14 | 2012-10-10 | 精工爱普生株式会社 | An exposure head and an image forming apparatus |
| JP2009196345A (en) * | 2008-01-21 | 2009-09-03 | Seiko Epson Corp | Line head and image forming apparatus |
| JP2009216730A (en) * | 2008-03-06 | 2009-09-24 | Oki Data Corp | Exposure device, image forming apparatus and reading apparatus |
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