JPS59194875A - Optical recording head - Google Patents
Optical recording headInfo
- Publication number
- JPS59194875A JPS59194875A JP58069659A JP6965983A JPS59194875A JP S59194875 A JPS59194875 A JP S59194875A JP 58069659 A JP58069659 A JP 58069659A JP 6965983 A JP6965983 A JP 6965983A JP S59194875 A JPS59194875 A JP S59194875A
- Authority
- JP
- Japan
- Prior art keywords
- led
- light
- array
- light exposure
- led array
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (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)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Projection-Type Copiers In General (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、発光素子アレイあるいは光量制御素子アレイ
等を用い、感光体に露光することにより記録を行なう光
記録ヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an optical recording head that performs recording by exposing a photoreceptor to light using a light emitting element array or a light amount control element array.
従来例の構成とその問題点
電子写真のように感光体を使用したプリンタ等の走査光
源には、発光ダイオード（以下、ＬＥＤと略記する）を
入力信号に応じて明滅させて記録する方式や、液晶の様
な光量制御素子を用いて光量を制御して記録する方式が
知られている。Conventional configurations and their problems Scanning light sources in printers and other devices that use photoreceptors, such as those used in electrophotography, include systems that use light-emitting diodes (hereinafter abbreviated as LEDs) to blink in response to input signals for recording. A method is known in which recording is performed by controlling the amount of light using a light amount control element such as a liquid crystal.
第１図は、従来のＬＥＤアレイヘッドを用いた電子写真
装置の概略構成図であり、第２図は従来のＬＥＤアレイ
ヘッドの棟、略措成図である。１はＬＥＤアレイヘンヘ
ッ２は電子写真プロセヌ部である。ＬＥＤアレイヘッド
１は、画信号入力端子１ａ、走査クロック回路１ｔ（Ｌ
ＥＤ駆動回路１Ｃ１複数のＬＥＤから構成されるＬＥＤ
アレイ１Ｊ ＬＥＤアレイ１ｄの光を集光するレンズ系
１ｅから構成される装置
また、電子写真プロセス部２ば、回転可能な感光性ドラ
ム２ａ、その周辺に配置された帯電部２ｂ、現像部２Ｃ
１転写部２ｄ、クリーニンク部２ｅ等から構成されてい
る。FIG. 1 is a schematic diagram of an electrophotographic apparatus using a conventional LED array head, and FIG. 2 is a schematic diagram of a conventional LED array head. 1 is an LED array head; 2 is an electrophotographic proscenium unit. The LED array head 1 has an image signal input terminal 1a, a scanning clock circuit 1t (L
ED drive circuit 1C1 LED composed of multiple LEDs
Array 1J A device consisting of a lens system 1e that focuses the light of the LED array 1d. Also, an electrophotographic processing section 2, a rotatable photosensitive drum 2a, a charging section 2b arranged around the drum, and a developing section 2C.
It is composed of a transfer section 2d, a cleaning section 2e, and the like.
才ず、画信号入力端子１ａから入力された画信号は、Ｌ
ＥＤ駆動回路１Ｃに入力される。ＬＥＤ駆動回路１Ｃに
は、ＬＥＤアレイ１ｄの素子数に対応する複数の駆動回
路が収容されており、各駆動回路の出力は、ＬＥＤアレ
イ１ｄの各ＬＥＤに供給される。走査クロック回路１ｂ
は、ＬＥＤ駆動回路１Ｃにクロック信号を出力し、ＬＥ
Ｄ駆動回路１Ｃにおいては、このクロック信号によって
画信号を１ライン分バッファメモリ （図示せず）に蓄
え、このパンツアメモリから並列的に同時に読み出しを
行ない、ＬＥＤアレイ１ｄを同時に発光させる。However, the image signal input from the image signal input terminal 1a is L.
It is input to the ED drive circuit 1C. The LED drive circuit 1C accommodates a plurality of drive circuits corresponding to the number of elements of the LED array 1d, and the output of each drive circuit is supplied to each LED of the LED array 1d. Scan clock circuit 1b
outputs a clock signal to the LED drive circuit 1C, and
In the D drive circuit 1C, one line of image signals is stored in a buffer memory (not shown) in response to this clock signal, and read out simultaneously in parallel from this panzer memory, causing the LED array 1d to emit light at the same time.
ＬＥＤアレイ１ｄからの光は、レンズ系１ｅを介して、
感光性ドラム２ａ上に結像される。感光性ドラム２ａは
、矢印方向に回転しつつ、帯電部２ｂで一様に帯電され
、その後ＬＥＤアレイ１ｄの光によって露光され静電潜
像か作成される。との潜像は、現像部２Ｃで現像され、
転写部２ｄにおいて図示しない普通紙に転写され、その
後定着されハードコピーとなる。さらに、感光性ドラム
２２Ｌは回転し、クリーニング部２ｅにおいてクリーニ
ングされる。The light from the LED array 1d passes through the lens system 1e,
An image is formed on the photosensitive drum 2a. The photosensitive drum 2a is uniformly charged by the charging section 2b while rotating in the direction of the arrow, and then exposed to light from the LED array 1d to create an electrostatic latent image. The latent image is developed in the developing section 2C,
The image is transferred to plain paper (not shown) in the transfer section 2d, and then fixed to become a hard copy. Furthermore, the photosensitive drum 22L rotates and is cleaned in the cleaning section 2e.
このような従来の電子写真装置の最大の問題点は、多数
のＬＥＤの発光光量のバラツキ、光量制御素子の通過光
景のバラツギあるいは光学系の光量ムラ等に起因する記
録濃度の不均一性、すなわち記録ムラであった。従来に
おいては、第２図に示したように、これらの記録ムラを
解消するために各素子のバラツキ等を補正するデータを
記憶している記憶部３ａと、この記憶部３ａからの信号
を並列に変換するシリア／Ｉ／／パラレル（Ｓ／Ｐ）変
換部３ｂと、Ｓ ／ Ｐ変換部３ｂからの信号によって
信号を発生する信号発生部３Ｃからなる制御信号発生回
路３を設け、電圧または電流もしくは印加時間を各素子
毎に制御することによシ光量が一様になるよう補正して
きた。すなわち、画信号を出ツノする両信号制御部５と
上述した制御信号発生回路３からの信号をアンドゲート
群４に人力し、このアン１−゛ゲート７ｆ’ｌ’４の出
力ににシ動作するＬＥＤアレイ駆動部６によりＬＥＤア
レイ１ｄの各ＬＥＤを！Ｕ御してい／ヒ。ところが、制
御信号制御回路３が記憶部３ａ、Ｓ／Ｐ変換部３ｂ、信
号発生部３Ｃから成シＩＬｊＩ回路規模が大きくなシ、
装置の価格が高くなるという欠点があった。The biggest problem with such conventional electrophotographic devices is the non-uniformity of recording density caused by variations in the amount of light emitted by a large number of LEDs, variations in the passing scene of the light amount control element, unevenness in the amount of light in the optical system, etc. The recording was uneven. Conventionally, as shown in FIG. 2, in order to eliminate these recording irregularities, a storage section 3a that stores data for correcting variations in each element, and the signals from this storage section 3a are connected in parallel. A control signal generation circuit 3 is provided, which includes a serial/I//parallel (S/P) converter 3b that converts the signal into a serial/I//parallel (S/P) converter 3b, and a signal generator 3C that generates a signal based on the signal from the S/P converter 3b. Alternatively, the amount of light has been corrected to be uniform by controlling the application time for each element. That is, the signals from the signal control section 5 that outputs the image signal and the control signal generation circuit 3 mentioned above are input to the AND gate group 4, and the output of the gate 7f'l'4 is operated on. Each LED of the LED array 1d is controlled by the LED array drive unit 6! U control/hi. However, if the control signal control circuit 3 consists of a storage section 3a, an S/P conversion section 3b, and a signal generation section 3C, the scale of the ILjI circuit is large.
The disadvantage was that the cost of the device was high.
発明の１」的
本発明は、従来のこのような問題点を解消するもので、
各発光素子の発光光量捷たは光量制御素子の透過光量の
バラツキ等による露光量のバラツギが無く、高品質な画
像が得られ、しかも制御信号発生回路等の付加回路規模
が小さくかつコスｌ−が安い光記録ヘソＦを提供するこ
とを目的とする。The present invention, which is part 1 of the invention, solves these conventional problems.
There is no variation in the exposure amount due to fluctuations in the amount of light emitted from each light emitting element or variations in the amount of transmitted light through the light amount control element, and high quality images can be obtained.Moreover, the scale of additional circuits such as the control signal generation circuit is small, and the cost is low. The purpose of the present invention is to provide a low-cost optical recording belly button F.
発明の（構成
本発明は、予め複数種類の電圧または印加時間を発生す
る基準信号発生回路を設け、各発光素子の発光光−１ｉ
４だけ各光量制御素子の通過光量もしくは光学系の透過
光量に応じて前記基準信号発生回路から出力されている
複数の信号の内から最適な信号を選択することによシ、
上記１」的を達成せんとするものである。(Structure of the Invention) In the present invention, a reference signal generating circuit is provided in advance to generate a plurality of types of voltages or application times, and the emitted light of each light emitting element is
4. By selecting the optimal signal from among the plurality of signals outputted from the reference signal generation circuit according to the amount of light passing through each light amount control element or the amount of light passing through the optical system,
The aim is to achieve the goal 1 above.
実施例の説明 以下、本発明の実施例を図面とともに説明する。Description of examples Embodiments of the present invention will be described below with reference to the drawings.
第３図は、本発明の一実施例に係る記録装置の概略構成
図、第４図は本発明の一実施例に係るＬＥＤアンイヘッ
ドの概略構成図である。FIG. 3 is a schematic diagram of a recording apparatus according to an embodiment of the present invention, and FIG. 4 is a schematic diagram of an LED unhead according to an embodiment of the present invention.
以下、この実施例について説明する。This example will be explained below.
画信号入力端子７から入力しだ１ライン分の画信号は、
一旦ＬＥＤ駆動回路９内の画信号制御部１３に入力、そ
の後アンドゲート群１４の各々のアントゲ−１・の一方
の端子に入力される。制御信号発生回路１０は、複数の
基準信号（この実施例においては複数の印加中を有する
信−号）を発生する基準信号発生部１０？Ｌから構成さ
れ、基準信号の数だけ出力線が出されている。アントゲ
−１〜群１４内の各々のアンドゲートの他端は、各々の
アントゲ−ｈに対応するＬＥＤアレイ１１内の各々のＬ
ＥＤのバラツキ等を補正するのに最適な基準信刃か出力
されている出力線と結線されている。The image signal for one line is input from the image signal input terminal 7.
The signal is once input to the image signal control unit 13 in the LED drive circuit 9, and then input to one terminal of each of the AND gates 14. The control signal generation circuit 10 includes a reference signal generation section 10 that generates a plurality of reference signals (in this embodiment, a signal having a plurality of applied signals). It is composed of L, and the number of output lines is the same as the number of reference signals. The other end of each of the AND gates in the ant games 1 to 14 is connected to each L in the LED array 11 corresponding to each ant game h.
It is connected to the output line that is output from the reference blade, which is optimal for correcting ED variations, etc.
アントゲ−１−１，ｔ’Ｆ １４からの出力は、ＬＥＤ
アレイ！１ｊＩｌ動部１５に入力され、走査クロック回
路８からのクロック信号に従ってＬＥＤアレイ駆動部１
５（ｄ動作する。ＬＥＤアレイ駆動部１５からの出力は
、ＬＥＤアレイ１１に入力され、各々のＬＥＤはそのバ
ラツギをなくなるよう制御される。そして、ＬＥＤアレ
イ１１からの光はレンヌ系１２を介して図示しない′市
イ写真プローレス部に人力され記録が行なわれる。The output from Antogame 1-1, t'F 14 is LED
array! 1jIl input to the driving unit 15 and driven by the LED array driving unit 1 according to the clock signal from the scanning clock circuit 8.
5(d) operates. The output from the LED array drive unit 15 is input to the LED array 11, and each LED is controlled to eliminate the variation.Then, the light from the LED array 11 is transmitted through the Rennes system 12. The recording is done manually by the City Photo Pro Wrestling Department (not shown).
ここで、ＬＥＤのバラツキの補正について詳しく説明す
る。Here, correction of LED variations will be explained in detail.
ＬＥＤアレイ１１の１番目のＬＥＤに電圧あるいは電流
を印加したときに感光性ドラム上に得られる光パワーを
Ｗｉ、Ｊｉ光性１・′ラム上への印加時間をＴ１とする
と、感光性ドラム上の露光量に１はＷ’ｉ Ｘ Ｔｉ
＝ Ｋｉ ・・・・・・（１）
となる。Wi is the optical power obtained on the photosensitive drum when a voltage or current is applied to the first LED of the LED array 11, and Ji is the optical power obtained on the photosensitive drum. 1 is W'i X Ti for the exposure amount of
= Ki・・・・・・(1)
becomes.
一般に光パワーＷ１は各ＬＥＤ素子の発光光量のバラツ
ギ等により一定ではなく、露光時間Ｔ１ が定でなくな
り記録ムラか生じる。したかって、本実施例の場合には
、露光時間Ｔ１を各ＬＥＤのバラツキ特性に合ったもの
にすることにより露光量に１を一定にし、記録ムラをな
くしている。すなわちアンドゲート郡１４は、露光量補
正のだめの制御回路としての働きをもっている。なお、
ｒｌ、（制御信号発生回路１０からの出力線とアンドゲ
ート２？１ｊ１４の各アントゲ−１−との結線は、熱的
あるいは機械的に結線する方法でよい。以」−はＬＥＤ
への印加時間でその露光量を制御する方法について述べ
たが、電圧値または電流値でも同様に制御できる。Generally, the optical power W1 is not constant due to variations in the amount of light emitted from each LED element, etc., and the exposure time T1 is not constant, resulting in uneven recording. Therefore, in the case of this embodiment, by setting the exposure time T1 to match the dispersion characteristics of each LED, the exposure amount is kept constant at 1 and recording unevenness is eliminated. That is, the AND gate group 14 functions as a control circuit for correcting the exposure amount. In addition,
rl, (The output line from the control signal generation circuit 10 and each AND gate 1- of the AND gates 2?1j14 may be connected thermally or mechanically. Hereinafter, "-" indicates an LED.
Although the method of controlling the exposure amount by the application time has been described, it can be similarly controlled by the voltage value or the current value.
丑だ、制御信号発生回路１０からの基準信号は、パルス
１］の異なるものだけでなく、複数種類の′電圧値でも
可能である。なお、以上の説明は、ＬＥＤを使用した場
合について述べたが、液晶等の光量制御素子を用いても
同様である。Unfortunately, the reference signal from the control signal generation circuit 10 can have not only different pulses 1 but also multiple voltage values. Note that although the above description has been made regarding the case where an LED is used, the same applies when a light amount control element such as a liquid crystal is used.
発明の効果
以上述べたように本発明によれば、発光素子アレイある
いは光量制御素子アレイ等を用い、感光体に露光するこ
とにより記録を行なう光記録ヘソ１−の構成を簡単にす
ることができ記録ムラをも補」Ｆすることができる。Effects of the Invention As described above, according to the present invention, it is possible to simplify the structure of the optical recording device 1- which performs recording by exposing a photoreceptor to light using a light emitting element array or a light amount control element array. It is also possible to compensate for recording unevenness.
第１図は従来のＬＥＤアレイヘッドを用いた電子写真装
置の概略構成図、第２図は従来のＬＥＤアレイヘノ１−
゛の概略構成図、第３図は本発明の一実施例に係る記録
装置の概略構成図、第４図は本発明の一実施例に係るＬ
ＥＤアレイヘッドの概略Ｊｕｌ−成図である。
８・・・ 走査クロック回路、９ 、、、、、、 Ｌ
Ｅ Ｄアレイ駆動回路、１０・・・−・制御信号発生回
路、１１・・・ＬＥＤアレイ。
代卯人の氏名 弁理士 中 尾 敏 男 ほか１名第
１ 図
第３図
ワFig. 1 is a schematic configuration diagram of an electrophotographic apparatus using a conventional LED array head, and Fig. 2 is a schematic diagram of an electrophotographic apparatus using a conventional LED array head.
3 is a schematic configuration diagram of a recording device according to an embodiment of the present invention, and FIG. 4 is a schematic diagram of a recording device according to an embodiment of the present invention.
It is a schematic diagram of an ED array head. 8... Scanning clock circuit, 9... L
ED array drive circuit, 10... control signal generation circuit, 11... LED array. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 3
Claims (1)
量制御素子アレイと、前記発光素子プレイあるいは光景
制御素子プレイのバラツキを補正するだめの印加電圧ま
たは印加型流もしくは印加時間を制御する複数の信号を
発生する基準信号発生手段と、前記発光素子アレイある
いは光量制御素子アレイの各素子と対応した複数の駆動
回路を有するプレイ駆動手段と、前記アレイ駆動手段の
複数の駆動回路に対応し、前記各素子の露光量を制御す
る複数の制御回路を有する制御手段を有し、前記複数の
制御回路の一端には画信号を入力し、他端には前記基準
信号発生手段から出力される複数の信号の中から前記発
光素子プレイあるいは光量制御素子アレイの各素子のバ
ラツギを補正するのに最適な信号を選択し入力するよう
にしたことを特徴とする光記録ヘッド。A light emitting element array or a light amount control element array arranged substantially linearly, and a plurality of signals for controlling an applied voltage, an applied current, or an applied time to correct variations in the light emitting element play or the sight control element play. a reference signal generating means for generating a signal, a play driving means having a plurality of driving circuits corresponding to each element of the light emitting element array or the light amount control element array, and a play driving means having a plurality of driving circuits corresponding to the plurality of driving circuits of the array driving means, It has a control means having a plurality of control circuits for controlling the exposure amount of the element, an image signal is inputted to one end of the plurality of control circuits, and a plurality of signals outputted from the reference signal generation means are provided to the other end. An optical recording head characterized in that a signal optimal for correcting variations in each element of the light emitting element play or light amount control element array is selected and inputted from among the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58069659A JPS59194875A (en) | 1983-04-19 | 1983-04-19 | Optical recording head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58069659A JPS59194875A (en) | 1983-04-19 | 1983-04-19 | Optical recording head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59194875A true JPS59194875A (en) | 1984-11-05 |
Family
ID=13409177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58069659A Pending JPS59194875A (en) | 1983-04-19 | 1983-04-19 | Optical recording head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59194875A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606472A (en) * | 1983-06-24 | 1985-01-14 | Canon Inc | Printer head driving apparatus |
| JPS606471A (en) * | 1983-06-24 | 1985-01-14 | Canon Inc | Printer head driving apparatus |
| JPS6469367A (en) * | 1987-09-11 | 1989-03-15 | Stanley Electric Co Ltd | Light quantity corrector for optical printer |
| US6292206B1 (en) * | 1997-12-26 | 2001-09-18 | Ricoh Company, Ltd. | Image forming apparatus and method of producing light quantity correction data |
-
1983
- 1983-04-19 JP JP58069659A patent/JPS59194875A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606472A (en) * | 1983-06-24 | 1985-01-14 | Canon Inc | Printer head driving apparatus |
| JPS606471A (en) * | 1983-06-24 | 1985-01-14 | Canon Inc | Printer head driving apparatus |
| JPS6469367A (en) * | 1987-09-11 | 1989-03-15 | Stanley Electric Co Ltd | Light quantity corrector for optical printer |
| US6292206B1 (en) * | 1997-12-26 | 2001-09-18 | Ricoh Company, Ltd. | Image forming apparatus and method of producing light quantity correction data |
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