JPS6131271A - Head of led printer - Google Patents
Head of led printerInfo
- Publication number
- JPS6131271A JPS6131271A JP15257084A JP15257084A JPS6131271A JP S6131271 A JPS6131271 A JP S6131271A JP 15257084 A JP15257084 A JP 15257084A JP 15257084 A JP15257084 A JP 15257084A JP S6131271 A JPS6131271 A JP S6131271A
- Authority
- JP
- Japan
- Prior art keywords
- rows
- row
- leds
- lateral
- photosensitive drum
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
- G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
- G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
- G06K15/1238—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point
- G06K15/1242—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on one main scanning line
- G06K15/1247—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on one main scanning line using an array of light sources, e.g. a linear array
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Facsimile Heads (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はＬＥＤプリンタの書込み用ヘッドとして用いら
れるヘッドに関し、特にヘッドを構成するＬＥＤの配夕
ｌｊ構造に改良を加えたＬＥＤプリンタのヘッドに関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a head used as a writing head for an LED printer, and more particularly to a head for an LED printer in which an arrangement structure of LEDs constituting the head is improved. .
ＬＥＤプリンタは、例えば第４図に示すように５ｅＴｅ
やアモルファス等の感光体を表面上に備えた感光ドラム
ｌと、該感光ドラム１の周囲に配されたヘッド２、現像
器３、転写器４、定着器５、消去ランプ６、清掃器７、
帯電器８から主に構成される。記録方式はいわゆる電子
写真記録方式で、ヘッド２に備えた多数のＬＥＤを光源
とする。The LED printer is, for example, 5eTe as shown in FIG.
A photosensitive drum l having a photosensitive material such as or amorphous on its surface, a head 2 arranged around the photosensitive drum 1, a developing device 3, a transfer device 4, a fixing device 5, an erasing lamp 6, a cleaning device 7,
It mainly consists of a charger 8. The recording method is a so-called electrophotographic recording method, and a large number of LEDs provided in the head 2 are used as light sources.
このＬＥＤプリンタの作動を説明すると、まず感光ドラ
ム１を帯電器８によシ一様に帯電させ、ヘッド２に高密
度に配列されたＬＥＤからの光を例えばセルフォック・
レンズ（図示せず）を介して感光ドラム五の異面上の感
光体に集光する。すると感光体には靜電潜ｍＡが形成さ
れる。To explain the operation of this LED printer, first, the photosensitive drum 1 is uniformly charged by the charger 8, and the light from the LEDs arranged in a high density on the head 2 is transferred to, for example, a SELFOC printer.
The light is focused on a photoconductor on a different surface of the photoconductor drum 5 through a lens (not shown). Then, a static potential mA is formed on the photoreceptor.
感光ドラムｌの回転に伴なってドツト状の靜電潜僚Ａが
形成された部位が現像器３の部位に至ると各靜電潜偉Ａ
はトナーを現像器３より与えられて現＊Ｂとなる。そし
てこの現像Ｂは、感光ドラムエと転写器４との間で、感
光ドラムエの回転周速度と同速度でカセット９から供給
される用紙１０に電気的な作用によシ転与される。As the photosensitive drum l rotates, the dot-shaped electromagnetic particles A are formed at the developing device 3, and as the photosensitive drum l rotates, each electromagnetic layer A is formed.
is supplied with toner from the developing device 3 and becomes a developed *B. The developed image B is electrically transferred between the photosensitive drum and the transfer device 4 to the paper 10 fed from the cassette 9 at the same speed as the rotational peripheral speed of the photosensitive drum.
ついで、用紙１０の進行に伴なって定着器５（図示のも
のは二本の圧力ローラである。）によシ押圧力を受けて
定着し、スタッカ１１に貯えられる。Then, as the paper 10 advances, it is fixed by the pressing force of the fixing device 5 (the one shown is two pressure rollers) and is stored in the stacker 11.
感光体上に残る靜電潜偉Ａは、消去ラング６によシ全体
的に像が形成されることにより消去され、ま圧感光ドラ
ム１の異面上に残る現像Ｂによる残滓は清掃器７によシ
除去され、帯電器８によシ改めて全体的に帯電させる。The photoreceptor A remaining on the photoreceptor is erased by forming an image on the entire surface by the erasing rung 6, and the residue from the developer B remaining on the other surface of the photoreceptor drum 1 is removed by the cleaner 7. After that, the entire surface is charged again by the charger 8.
従来のヘッド２に用いられるＬ Ｅ Ｄ １２は、第３
図に示すように一列に高密度で配された一群のものであ
る。例えば８４判用として２５６ ｍの走査線長に対し
て２０３４個のＬ Ｅ Ｄ １２を並べたものが知られ
ている。そして第３図では図示せぬが、これらＬ Ｅ
Ｄ １２に対して夫々駆動回路が一列若しくは千鳥状に
配列、接続せられ、印字対象に応じて各Ｌ Ｅ Ｄ １
２を選択的に駆動し発光、消光を行なわせ、ドツト状の
印字を行なわせている。The L E D 12 used in the conventional head 2 is
As shown in the figure, they are a group of high-density arrays arranged in a row. For example, it is known that 2034 LEDs 12 are lined up for a scanning line length of 256 m for 84 format. Although not shown in FIG. 3, these L E
Drive circuits are arranged and connected to each L E D 12 in a line or in a staggered manner, and each L E D 1
2 is selectively driven to emit and extinguish light, thereby printing dots.
しかしながら、上記従来のＬＥＤプリンタのヘッド２に
あっては、駆動回路が多数のＬＥＤと同数、即ち印字ド
ツト数と等しい数だけ必要になっていた。このため、漢
字のドツト印字の如く画質を上げるために高解像度、換
言すれば高密度のドツト印字が要求される（例えば１ｍ
１１１当９１６ドツトの密度でＡ４サイズの用紙に印字
する場合、用紙の幅約２１０ ｍに対して約３３６０個
という多数のＬ Ｅ Ｄ １２及び駆動回路が必要とな
り、各Ｌ ＥＤ １２同士の間隔は６２５μｍとなる。However, the head 2 of the conventional LED printer described above requires the same number of drive circuits as the number of LEDs, that is, the number of drive circuits equal to the number of printed dots. For this reason, high resolution, in other words, high-density dot printing is required to improve image quality, such as dot printing of kanji (for example, 1 m
When printing on A4 size paper at a density of 916 dots per 111 dots, a large number of LEDs 12 and drive circuits, approximately 3360 pieces, are required for the width of the paper of approximately 210 m, and the spacing between each LED 12 is It becomes 625 μm.
）場合、製造が困難とされ、高密度化に限界があった。), it was considered difficult to manufacture and there was a limit to high density.
本発明に係るＬＥＤプリンタのヘッドは、上記従来の問
題点を解決するために、複数個のしＥＤを所定距離ずつ
離設して横列を形成すると共に、該横列を僅かずつずら
して上記感光ドラムの回転方向に沿って複数列設け、各
横列の対応するＬＥＤによシ所定数の縦列を形成し、且
つ上記横列及び縦列の夫々にＬＥＤの制御用の駆動回路
を配してなシ、多数個のＬＥＤ力）ら射出した光を夫々
感光ドラム面上に集光させ、トナーを与えられると現像
となシ供給される用紙へ転写、定着可能となる潜像を形
成するようにしたものである。In order to solve the above-mentioned conventional problems, an LED printer head according to the present invention has a plurality of LEDs spaced apart from each other by a predetermined distance to form rows, and the rows are slightly shifted so that the photosensitive drum A plurality of rows are provided along the rotational direction, a predetermined number of columns are formed by LEDs corresponding to each row, and a drive circuit for controlling the LEDs is arranged in each of the rows and columns. The light emitted from each LED is focused on the surface of the photosensitive drum, and when toner is applied, it forms a latent image that can be developed and transferred and fixed onto the supplied paper. be.
以下、本発明の実施例を図面に基づいて説明する。尚、
以下で、は従来と共通の部分には共通の符号を付して重
複する説明は省略する。Embodiments of the present invention will be described below based on the drawings. still,
In the following, parts common to those in the prior art will be given common reference numerals and redundant explanations will be omitted.
第１図は本発明の一実施例におけるＬＥＤの配列を示す
説明図、第２図はＬＥＤの列と駆動回路との対応を示す
説明図でおる。FIG. 1 is an explanatory diagram showing an arrangement of LEDs in an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the correspondence between LED columns and drive circuits.
図において、Ｌ Ｅ Ｄ １２の横列Ｌ （Ｌｌ、 Ｌ
ｚ 、・・・。In the figure, L E D 12 row L (Ll, L
z...
Ｌｎ）はに個ＯＬ Ｅ Ｄ １２から構成され、各横列
Ｌ（Ｌｌ、 Ｌｚ 、 −、Ｌｎ）の対応するｎ個のＬ
ＥＤアレイ［２が連なってに個の縦列Ｃ（ＣＩ、Ｃ２，
・・・。Ln) is composed of 12 OL E D 12, and each row L (Ll, Lz, -, Ln) has corresponding n L
ED array [2 columns C (CI, C2,
....
ＣＲ）を構成している。CR).
各横列りを構成する各Ｌ Ｅ Ｄ １２は、夫々所定距
離君だけ離れている。また相隣る横列Ｌ】とＬｚ 。The LEDs 12 forming each row are separated from each other by a predetermined distance. Also, the adjacent rows L] and Lz.
ＬｚとＬｓ 、・・・Ｌｎ−１とＬｎ同士の間の距離Ｓ
は、感光ドラム１の回転速度等に相応させて定めである
。相隣る横列Ｌ１とＬｚ 、 ＬｚとＬａ 、 −Ｌ
ｆｉ−１とＬｎは、感光ドラム１の回転方向〔図中矢示
Ｘ方向〕Ｋ沿ってＬ Ｅ Ｄ １２の一個分程度順次ず
らして設けてめシ、斜め方向にシフトした状態に上記縦
列Ｃ（ＣＩ、Ｃ２、・・・、ＣＲ）を形成している。Lz and Ls, ... distance S between Ln-1 and Ln
is determined depending on the rotational speed of the photosensitive drum 1, etc. Adjacent rows L1 and Lz, Lz and La, -L
fi-1 and Ln are sequentially shifted by about one length of L E D 12 along the rotational direction of the photosensitive drum 1 [direction of arrow X in the drawing] K, and the above-mentioned column C ( CI, C2, ..., CR).
そして最終のｎ番目の横列ＬｎのＬ Ｅ Ｄ １２は、
夫々次の縦列Ｃを構成する第１番目の横列ＬｌのＬＥ
Ｄ １２と、投射した位置関係で密接するようになって
いる。And L E D 12 of the final nth row Ln is,
LE of the first row Ll constituting the next column C, respectively
It is in close contact with D12 due to the projected positional relationship.
各横列りと各縦列ＣのＬ Ｅ Ｄ １２は夫々第２図に
示すようにマトリックス状に電気的に接続してあシ、各
列毎に駆動回路ＤＬ （ＤＬｌ、 ＤＬｚ 、・・・。The LEDs 12 in each row and each column C are electrically connected in a matrix as shown in FIG. 2, and a drive circuit DL (DLl, DLz, . . .
ＤＬｎ ） 、及びＤＣ（Ｄｅｌ、ＤＣｚ 、 −ＤＣ
Ｒ）が設けである。このため、第１図の例と同数のｎＸ
ｋ個のＬ Ｅ Ｄ １２を従来と同様１列に並べた場合
にｎ×に個の駆動回路を必要とするの罠対し、第１図及
び第２図の例ではｎ十に個の駆動回路で済んでいる。即
ち、１個のＬ Ｅ Ｄ １２を発光させるのに、そのＬ
Ｅ Ｄ １２が属している横列り及び縦列Ｃに接続す
る２個の駆動回路ＤＬ、ＤＣを組合せて作動させるもの
となっている。DLn), and DC(Del, DCz, -DC
R) is provided. Therefore, the same number of nX as in the example of FIG.
If k LEDs 12 are arranged in a line as in the conventional case, n× drive circuits are required, but in the example of FIGS. 1 and 2, n× drive circuits are required. It is enough. That is, in order to make one L E D 12 emit light, the L
Two drive circuits DL and DC connected to the row and column C to which the E D 12 belongs are operated in combination.
尚、図示の例でａ Ｌ Ｅ Ｄ １２の配列を右下シの
状態のもののみ示しているが、勿論左下りのものとして
も差し支えない。In the illustrated example, only the arrangement of the a L E D 12 is shown in the lower right position, but it is of course possible to arrange it in the lower left position.
以下、本実施例における動作を説明する。The operation in this embodiment will be explained below.
まず、第１番目の横列Ｌ１を構成するＬ Ｅ Ｄ １２
のうち、印字作動すべきＬ Ｅ Ｄ １２を適宜の制御
手段（例えばマイクロコンピュータ）罠よす選択し、対
応する駆動回路ＤＬ、ＤＣを作動させ、Ｌ Ｅ Ｄ １
２を発光させる。例えば横列Ｌｌの第１０番目及び第１
１番目のＬ Ｅ Ｄ １２を発光させる場合は、横列Ｌ
ＩＧＣ接続した駆動回路ＤＬＩと、第１０番目及び第１
１番目の縦列Ｃｉｏ、Ｃｏに接続した駆動回路ＤＣ１ｏ
、ＤＣＩＩとを作動させる。そして感光ドラム１の感
光体には、これら二個のＬ Ｅ Ｄ １２から射出され
た光が集光されて静電潜像Ａが形成される。First, L E D 12 constituting the first horizontal row L1
Among them, an appropriate control means (for example, a microcomputer) selects the L E D 12 to be activated for printing, and activates the corresponding drive circuits DL and DC.
2 to emit light. For example, the 10th and 1st row Ll
When making the first L E D 12 emit light, the horizontal row L
IGC-connected drive circuit DLI and the 10th and 1st
Drive circuit DC1o connected to the first column Cio, Co
, DCII. Then, the light emitted from these two LEDs 12 is focused on the photosensitive member of the photosensitive drum 1, and an electrostatic latent image A is formed.
次に感光ドラム１が回転して、上記の如く静電潜像Ａが
形成された部位が第２番目の横列Ｌ２の位置に至ると、
上記と同様に選択されたＬＥＤｔ２が発光し静電潜像Ａ
を形成する。例えば上記第一列と同様に第１０番目及び
第１１番目のＬＥＤｔ２を発光させると、二つの横列Ｌ
ｌ、Ｌｚ中のＬＥＤ１２ＩＣよる静電潜像Ａは二つずつ
密着した状態で形成されることになる。これを第ｎ番目
の横列ＬｎＫ至るまで繰返せば、同一の走査線上に時間
を置いてドツトによる印字が行なわれることになる。Next, when the photosensitive drum 1 rotates and the area where the electrostatic latent image A is formed as described above reaches the position of the second row L2,
In the same way as above, the selected LED t2 emits light and electrostatic latent image A
form. For example, if the 10th and 11th LEDs t2 are made to emit light in the same way as the first row above, two horizontal rows L
Two electrostatic latent images A by the LED 12 ICs in L and Lz are formed in close contact with each other. If this is repeated up to the n-th horizontal row LnK, dot printing will be performed on the same scanning line at certain intervals.
勿論、第２番目の横列Ｌ２のＬ Ｅ Ｄ １２が作動中
にも第１番目の横列ＬｌのＬ Ｅ Ｄ １２は、次の走
査＠ＶＣ関して上記と同様に選択的に駆動され所定の静
電潜ｍＡを形成している。即ち、最終の横列Ｌｎが最初
の走査線に関して作動する状態に至ると、全部の横列Ｌ
ｌ、Ｌ２．・・・、Ｌｍが作動可能な状態となシ、各駆
動回路ＤＬ、ＤＣの組合せによυ選択されたＬ Ｅ Ｄ
１２が全損列りに亘って発光、消光を繰返し、用紙１
０に所望のドツト印字を行なう。Of course, even while the LED 12 of the second row L2 is in operation, the LED 12 of the first row L1 is selectively driven in the same manner as above for the next scan @VC, and is kept at a predetermined static state. It forms an electric potential mA. That is, once the last row Ln is activated with respect to the first scan line, all rows Ln
l, L2. ..., Lm is not in an operable state, L E D selected by the combination of each drive circuit DL and DC
12 repeats emitting and extinguishing throughout the total loss row, and paper 1
Print desired dots at 0.
尚、以上の説明において、ＬＥＤｔ２の光の射出方向は
紙面に垂直方向である。また駆動回路ＤＬ、ＤＣとして
は公知のものが種々採用でき、特殊なものを必要とする
ことはない。In the above description, the light emission direction of the LED t2 is perpendicular to the paper surface. Furthermore, various known drive circuits can be used as the drive circuits DL and DC, and no special ones are required.
本発明に係るＬＥＤプリンタのヘッドは、以上の如く、
複数個のＬＥＤｔ−所定距離ずつ離設して横列を形成す
ると共に、該横列を微かずつずらして感光ドラムの回転
方向に沿って複数列設け、各横列の対応するＬＥＤによ
り所定数の縦列を形成し、且つ上記横列及び縦列の夫々
にＬＥＤの制御用の駆動回路を配してなるものとしたた
め、各横列中におけるＬＥＤの配列が租であっても高密
度に印字することが可能となり、駆動回路の必要個数も
従来に比べて大幅に削減することができるという効果が
ある。As described above, the LED printer head according to the present invention has the following features:
A plurality of LEDs are spaced apart from each other by a predetermined distance to form rows, and the rows are slightly shifted to form a plurality of rows along the rotational direction of the photosensitive drum, and the corresponding LEDs in each row form a predetermined number of columns. In addition, since drive circuits for controlling the LEDs are arranged in each of the rows and columns, high-density printing is possible even if the LEDs in each row are arranged neatly. This has the effect that the required number of circuits can be significantly reduced compared to the conventional method.
第１図社、本発明の一実施例の説明図、第２図は、第１
図の例におけるＬＥＤの列と駆動回路の対応を示すｉｌ
ｉ！明図、ｊＩｓ図は従来のヘンドにおけるＬＥＤの配
狗を示す説明図、そして第４図はＬＥＤプリンタの概念
図である。
ｌ・・・感光ドラム ２°°°ヘンドｌＯ・・・用
紙 １２・・・ＬＥＤＡ・・・静電潜像
Ｂ・・・現象Ｃ・・・ＬＥＤの縦列 Ｌ・・・Ｌ
ＥＤの横列ＤＣ，ＤＬ・・・駆動回路
Ｘ・・・感光ドラムの回転方向Figure 1, an explanatory diagram of an embodiment of the present invention, Figure 2 is
il showing the correspondence between the rows of LEDs and the drive circuit in the example shown in the figure.
i! The clear and jIS diagrams are explanatory diagrams showing the arrangement of LEDs in a conventional printer, and FIG. 4 is a conceptual diagram of an LED printer. l...Photosensitive drum 2°°°Hend lO...Paper 12...LEDA...Electrostatic latent image
B... Phenomenon C... Column of LEDs L...L
ED rows DC, DL...Drive circuit X...Rotation direction of photosensitive drum
Claims (1)
集光させ、トナーを与えられると現像となり供給される
用紙へ転写、定着可能となる潜像を形成するＬＥＤプリ
ンタのヘッドにおいて、 複数個のＬＥＤを所定距離ずつ離設して横列を形成する
と共に、該横列を僅かずつずらして上記感光ドラムの回
転方向に沿つて複数列設け、各横列の対応するＬＥＤに
より所定数の縦列を形成し、且つ上記横列及び縦列の夫
々にＬＥＤの制御用の駆動回路を配してなることを特徴
とするＬＥＤプリンタのヘッド。[Claims] An LED printer that focuses light emitted from a large number of LEDs onto the surface of a photosensitive drum, and forms a latent image that is developed when toner is applied and can be transferred and fixed onto supplied paper. In the head, a plurality of LEDs are spaced apart by a predetermined distance to form rows, and the rows are slightly shifted to provide a plurality of rows along the rotational direction of the photosensitive drum, and the corresponding LEDs in each row form a predetermined row. 1. A head for an LED printer, characterized in that a number of columns are formed, and drive circuits for controlling LEDs are arranged in each of the rows and columns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15257084A JPS6131271A (en) | 1984-07-23 | 1984-07-23 | Head of led printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15257084A JPS6131271A (en) | 1984-07-23 | 1984-07-23 | Head of led printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6131271A true JPS6131271A (en) | 1986-02-13 |
Family
ID=15543363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15257084A Pending JPS6131271A (en) | 1984-07-23 | 1984-07-23 | Head of led printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6131271A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62256563A (en) * | 1986-04-30 | 1987-11-09 | Fuji Xerox Co Ltd | Optical write device |
| EP0310287A2 (en) * | 1987-09-30 | 1989-04-05 | Prp Optoelectronics Limited | Light emitting diode array |
| EP0310267A2 (en) * | 1987-09-30 | 1989-04-05 | Plessey Overseas Limited | Method of alignement of led chips |
| JPH0791147A (en) * | 1993-09-22 | 1995-04-04 | Eidai Co Ltd | Manufacture of door |
| US6262540B1 (en) | 1998-05-26 | 2001-07-17 | Fuji Xerox Co., Ltd. | Semiconductor device and image formation apparatus using same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5726876A (en) * | 1980-07-24 | 1982-02-13 | Ricoh Co Ltd | Electrophotographic type printer device |
-
1984
- 1984-07-23 JP JP15257084A patent/JPS6131271A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5726876A (en) * | 1980-07-24 | 1982-02-13 | Ricoh Co Ltd | Electrophotographic type printer device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62256563A (en) * | 1986-04-30 | 1987-11-09 | Fuji Xerox Co Ltd | Optical write device |
| EP0310287A2 (en) * | 1987-09-30 | 1989-04-05 | Prp Optoelectronics Limited | Light emitting diode array |
| EP0310267A2 (en) * | 1987-09-30 | 1989-04-05 | Plessey Overseas Limited | Method of alignement of led chips |
| EP0310267A3 (en) * | 1987-09-30 | 1989-06-07 | Plessey Overseas Limited | Method of alignement of led chips |
| JPH0791147A (en) * | 1993-09-22 | 1995-04-04 | Eidai Co Ltd | Manufacture of door |
| US6262540B1 (en) | 1998-05-26 | 2001-07-17 | Fuji Xerox Co., Ltd. | Semiconductor device and image formation apparatus using same |
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