JP2817150B2 - LED printer head - Google Patents
LED printer headInfo
- Publication number
- JP2817150B2 JP2817150B2 JP32163088A JP32163088A JP2817150B2 JP 2817150 B2 JP2817150 B2 JP 2817150B2 JP 32163088 A JP32163088 A JP 32163088A JP 32163088 A JP32163088 A JP 32163088A JP 2817150 B2 JP2817150 B2 JP 2817150B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- led array
- led
- amount
- printer head
- 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.)
- Expired - Lifetime
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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、LEDアレイから発せられる光を収束性光伝
送体を介して感光体ドラム等の被帯電物に露光するLED
プリンタヘッドに関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED for exposing light emitted from an LED array to an object to be charged such as a photosensitive drum via a convergent light transmitter.
Related to a printer head.
従来の技術 この種のLEDプリンタヘッドにおいて、コピー品質
（画像品質）の向上を図るためには、プリンタ内の温度
変化等に伴なうLEDの光量変化（出力変化）を検知し、
検知結果に基づきLEDアレイの発光量を常時所望の値に
補正（制御）することが必要になる。2. Description of the Related Art In order to improve copy quality (image quality) in this type of LED printer head, a change in the amount of light (output change) of the LED due to a temperature change in the printer is detected.
It is necessary to constantly correct (control) the light emission amount of the LED array to a desired value based on the detection result.
従来、かかる光量の検出は、LEDアレイから発せら
れ、感光体ドラムの表面から反射する反射光を検出する
ことにより行われていた。Conventionally, such light quantity detection has been performed by detecting reflected light emitted from the LED array and reflected from the surface of the photosensitive drum.
発明が解決しようとする課題 しかしながら、上述の如く感光体ドラムからの反射光
を検出する形態をたる場合は、以下に示す欠点があるた
め、精度のよい光量検出が行えず、結果的にコピー品質
の向上を図る上で限界があった。However, in the case where the reflected light from the photosensitive drum is detected as described above, because of the following disadvantages, accurate light quantity detection cannot be performed, resulting in copy quality There was a limit in improving the quality.
即ち、 トナーが感光体ドラムの表面を汚すため、感光体ドラ
ムの反射効率が変動し、精度のよい検出が行なえないと
いう欠点がある。That is, since the toner stains the surface of the photoconductor drum, the reflection efficiency of the photoconductor drum fluctuates, and accurate detection cannot be performed.
感光体ドラムはアルミニウム製のドラム面に、例えば
セレン系の半導体からなる光導電層を形成した構造にな
っているため、長期間にわたって使用する場合に、光疲
労等に起因する傷や光導電層の膜厚変化を生じ、精度の
よい検出が行なえないという欠点がある。The photoreceptor drum has a structure in which a photoconductive layer made of, for example, a selenium-based semiconductor is formed on an aluminum drum surface. However, there is a defect that accurate detection cannot be performed.
本発明はかかる現状に鑑みてなされたものであり、長
期間にわたって精度のよい光量検出が行なえ、この結
果、コピー品質の向上が図れることになるLEDプリンタ
ヘッドを提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the invention is to provide an LED printer head that can accurately detect the amount of light over a long period of time, thereby improving the copy quality.
本発明の他の目的は、電力消費量やトナーの節約を図
ることにある。Another object of the present invention is to save power consumption and toner.
課題を解決するための手段 上記の目的を達成するための具体的手段として、本発
明は、LEDアレイから発せられる光を収束性伝送体を介
して被帯電物に露光するLEDプリンタヘッドにおいて、
前記LEDアレイ及び少なくとも前記収束性光伝送体の基
端部を密閉状態に収容するケーシングと、前記ケーシン
グ内に配設され、前記LEDアレイが発光された際に入射
する光の光量を検出する検出手段と、非画像形成時にお
ける画像濃度制御用マークの書き込みのために前記LED
アレイが発光された際の前記検出手段による検出結果に
基づき、前記LEDアレイの発光光量を制御する制御手段
とを備えたことを特徴とする。Means for Solving the Problems As a specific means for achieving the above object, the present invention relates to an LED printer head that exposes an object to be charged with light emitted from an LED array via a convergent transmission body,
A casing for housing the LED array and at least a base end of the convergent light transmitting body in a sealed state, and a detection disposed in the casing and detecting an amount of light incident when the LED array emits light. Means for writing an image density control mark during non-image formation
Control means for controlling the light emission amount of the LED array based on a detection result by the detection means when the array emits light.
作用 本発明に係るLEDプリンタヘッドによれば、LEDアレイ
及び収束性光伝送体が密閉状態に収容されたケーシング
内に配設された検出手段により、非画像形成時における
画像濃度制御用マークの書き込みのために発光された際
の前記LEDアレイの発光光量が検出されるとともに、該
検出結果に基づき前記LEDアレイの発光光量が制御され
る。Effect According to the LED printer head of the present invention, writing of the image density control mark at the time of non-image formation is performed by the detecting means provided in the casing in which the LED array and the convergent light transmitting body are housed in a sealed state. The amount of light emitted from the LED array when the light is emitted is detected, and the amount of light emitted from the LED array is controlled based on the detection result.
実 施 例 以下本発明の一実施例を図面に基づき具体的に説明す
る。第１図は本発明に係るLEDプリンタヘッドを感光体
ドラムと共に示す一部切欠き側面図、第２図はそのII−
II線による拡大断面図、第３図は制御系を示すブロック
図、第４図は制御動作を示すタイミングチャートであ
る。Embodiment An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a partially cutaway side view showing an LED printer head according to the present invention together with a photosensitive drum, and FIG.
FIG. 3 is a block diagram showing a control system, and FIG. 4 is a timing chart showing a control operation.
プリンタ本体（図示せず）の内部所定位置には感光体
ドラム１を回転自在に装置してあり、これの上方にLED
プリンタヘッド２を装置してある。LEDプリンタヘッド
２は、感光体ドラム１の軸長方向に長いアルミ放熱板20
の下面側に、中空かつ上端側が広幅になったケーシング
21を取付けた基本構造になっている。アルミ放熱板20及
びケーシング21の長さは感光体ドラム１の軸長寸法に略
等しく選定されている。そして、両者により密閉状態に
維持される内部空間に以下の部材を取付けてある。A photoreceptor drum 1 is rotatably mounted at a predetermined position inside a printer main body (not shown).
A printer head 2 is provided. The LED printer head 2 has an aluminum heat sink 20 long in the axial direction of the photosensitive drum 1.
Casing with a hollow upper end and a wider upper end
Basic structure with 21 attached. The lengths of the aluminum radiator plate 20 and the casing 21 are selected to be substantially equal to the axial length of the photosensitive drum 1. The following members are mounted in an internal space maintained in a sealed state by both.
即ち、アルミ放熱板20の下面には、これの略全長にわ
たってセラミック基板22を取付けてあり、セラミック基
板22の幅方向中央部に相当する下面に、金ワイヤ23、23
で電気的に接続してなるドライブIC24及びLEDチップ25
を実装してある。ドライブIC24はLEDチップ25の駆動制
御を行なうものであり、両者は共にセラミック基板22の
長手方向に多数設けられており、これら全体でLEDアレ
イ26が構成されている。なお、セラミック基板22はフレ
キシブル基板29、コネクタ40を介して図外の電源やコン
トローラに接続されている。That is, a ceramic substrate 22 is attached to the lower surface of the aluminum heat sink 20 over substantially the entire length thereof, and gold wires 23, 23 are provided on the lower surface corresponding to the widthwise center of the ceramic substrate 22.
Drive IC 24 and LED chip 25 electrically connected by
Has been implemented. The drive IC 24 controls the driving of the LED chip 25. Both of them are provided in the longitudinal direction of the ceramic substrate 22 in a large number, and the LED array 26 is composed of the whole. The ceramic substrate 22 is connected to a power supply and a controller (not shown) via a flexible substrate 29 and a connector 40.
ケーシング21の狭幅になった下端側には、LEDアレイ2
6から発光される光を集光し、感光体ドラム１の表面に
露光する収束性光伝送体27の上部を挾着してある。収束
性光伝送体27は所定の幅寸法にわたって分散配置してな
る多数のロッドレンズをLEDアレイ26の長手方向の略全
長に配置してなる。At the narrow lower end of the casing 21, an LED array 2
The light emitted from 6 is condensed, and the upper part of a convergent light transmitter 27 for exposing the surface of the photosensitive drum 1 is clamped. The convergent light transmitting body 27 is composed of a large number of rod lenses distributed over a predetermined width dimension and arranged substantially over the entire length of the LED array 26 in the longitudinal direction.
そのうえで、ケーシング21の内部には、LEDアレイ26
から発光される直接光及び収束性光伝送体27の上端面か
ら反射する反射光を受光し、受光量、即ち検出量を第３
図に示す差動増幅器30及びA/D変換器31を介してマイク
ロプロセッサ32に入力する受光素子28を取付けてある。
受光素子28の取付け位置は第２図に示す位置に限定され
るものではなく、LEDアレイ26、より具体的にはLEDチッ
プ25から発光され、収束性光伝送体27の上端面に入射さ
れる光の光路を妨げる位置以外の位置であればよい。な
お、差動増幅器30は温度変動に伴なう検出光量の変化を
キャンセルする、つまり温度補償機能を有する。Then, inside the casing 21, an LED array 26
And the reflected light reflected from the upper end face of the convergent light transmitter 27 is received, and the amount of received light, that is, the detected amount is
A light receiving element 28 for inputting to a microprocessor 32 via a differential amplifier 30 and an A / D converter 31 shown in the figure is attached.
The mounting position of the light receiving element 28 is not limited to the position shown in FIG. 2, but is emitted from the LED array 26, more specifically, from the LED chip 25, and is incident on the upper end surface of the convergent light transmitter 27. Any position other than the position where the optical path of light is blocked may be used. The differential amplifier 30 has a function of canceling a change in the amount of detected light due to a temperature change, that is, a temperature compensation function.
マイクロプロセッサ32は、受光素子28の検出結果（検
出光量）と予めメモリ33に設定入力されているLEDチッ
プ25の基準光量データ（好ましい露光動作を行なうため
に必要な発光量に関するデータ）とに基づき当該検出時
における光量の補正分を演算し、演算結果をコントロー
ラ34に入力する。The microprocessor 32 is based on the detection result of the light receiving element 28 (detected light amount) and the reference light amount data of the LED chip 25 previously set and input in the memory 33 (data relating to the light emission amount necessary for performing a preferable exposure operation). The correction amount of the light amount at the time of the detection is calculated, and the calculation result is input to the controller.
コントローラ34はLEDアレイ26中のLEDチップ25の駆動
制御、より具体的には前記ドライブIC24を介しての駆動
制御を行なうものであり、前記補正分に対応した分だけ
LEDチップ25の発光量をアップ（又はダウン）すること
になる。具体的には下記式で示されるLEDチップ25の
駆動電流値（又は駆動電圧値）Ｐ或いはLEDチップ25の
駆動時間ｔ（より具体的には、駆動パルスのデューティ
比）を制御して発光光量（エネルギ値）Ｅを制御するこ
とになる。The controller 34 controls the drive of the LED chips 25 in the LED array 26, more specifically, controls the drive via the drive IC 24, and controls only the amount corresponding to the correction amount.
The light emission amount of the LED chip 25 is increased (or decreased). Specifically, the drive current value (or drive voltage value) P of the LED chip 25 or the drive time t (more specifically, the duty ratio of the drive pulse) of the LED chip 25 is controlled by (Energy value) E will be controlled.
Ｅ＝Ｐ・ｔ…… 以上の制御動作は第４図に示すタイミングチャートに
従って行われるが、上記受光素子28による光量検出はAI
DC（Auto Image Density Control）マークの書き込
み時、像間イレース実行時及びサイドイレース実行時等
の画像形成を行わない時点において行われる。E = P · t The above control operation is performed according to the timing chart shown in FIG.
This is performed at the time when image formation is not performed, such as when writing a DC (Auto Image Density Control) mark, when performing inter-image erase, and when performing side erase.
ここに、AIDCマークの書き込みとは、トナー濃度を制
御して、コピー品質の向上を図るために行われる。具体
的には、現像工程において、感光体ドラム１の表面に形
成される静電潜像に付着し、これを顕像化するトナーの
濃度（供給量）を常時一定の値に制御すべく実行され
る。即ち、このAIDC方式は、感光体ドラム１表面の原稿
画像以外の領域に対応する部分に、例えば原稿台ガラス
（図示せず）の前或いは後ろに形成した黒色の基準パタ
ーンに対応するスポット状の基準潜像を形成し、これを
現像して基準画像を得、その後、基準画像のトナー付着
量を検出し、この検出結果に応じて現像槽内の現像剤中
のトナー濃度を常時一定に設定すべく、現像装置に対す
るトナー補給量を制御するのである。Here, the writing of the AIDC mark is performed in order to control the toner density and improve the copy quality. More specifically, in the developing process, the density (supply amount) of the toner that adheres to the electrostatic latent image formed on the surface of the photosensitive drum 1 and visualizes the electrostatic latent image is constantly controlled to a constant value. Is done. That is, in the AIDC method, for example, a spot-shaped spot corresponding to a black reference pattern formed before or after a platen glass (not shown) is formed on a portion corresponding to a region other than the document image on the surface of the photosensitive drum 1. A reference latent image is formed and developed to obtain a reference image. Thereafter, the amount of toner adhered to the reference image is detected, and the toner concentration in the developer in the developing tank is constantly set according to the detection result. To this end, the amount of toner supplied to the developing device is controlled.
そして、このAIDCマークの書き込みは、LEDアレイ26
からの光が照射されずマイナス帯電状態にある感光体ド
ラム表面にプラス帯電状態にあるトナーを付着して現像
を行なう正転（正規）現像を行なう場合のみならず、こ
れとは逆にLEDアレイ26からの光が照射された感光体ド
ラム１表面に現像装置からマイナス帯電状態にあるトナ
ーを付着して、現像を行なう反転現像を行なう場合にも
行われる。The AIDC mark is written on the LED array 26
In addition to the normal (normal) development, in which the positively charged toner is applied to the surface of the negatively charged photosensitive drum without being irradiated with light from the surface of the photoreceptor drum, the LED array is reversed. This is also performed when reversal development is performed in which a negatively charged toner is attached from the developing device to the surface of the photoreceptor drum 1 irradiated with light from 26 to perform development.
因みに、第１図は反転現像時におけるAIDCマークの書
き込み動作を示しており、図中斜線で示すスポット状の
AIDCマーク29が感光体ドラム１の表面に書き込まれるこ
とになる。従って、この場合には、この領域のみにLED
アレイ26からの光が照射されることになるので、LEDア
レイ26の内、AIDCマーク29の上方位置に相当する複数の
LEDチップ25が発光（点灯）されることになる。従っ
て、これらのLEDチップ25の発光量制御をコントローラ3
4が駆動制御することになるのである。FIG. 1 shows the writing operation of the AIDC mark at the time of reversal development.
The AIDC mark 29 is written on the surface of the photosensitive drum 1. Therefore, in this case, only in this area the LED
Since light from the array 26 is irradiated, a plurality of LED arrays 26 corresponding to positions above the AIDC mark 29 are illuminated.
The LED chip 25 emits light (lights up). Therefore, the light emission amount of these LED chips 25 is controlled by the controller 3.
4 controls the drive.
そして、このとき発光されるLEDチップ25からの光を
検出するために、AIDCマーク29の上方に相当する図中斜
線で示すマーキング位置28aに受光素子28が配置される
ことになる。このように、受光素子28の長手方向におけ
る配置位置は画像形成動作を行わない時点において発光
されることになるLEDチップ25の長手方向位置に相当す
る位置に選定されることになる。従って、検出時におい
て、LEDアレイ26全体を発光させる必要がないので、そ
の分電力消費量の節約が図れることになる。また、トナ
ーの消費量も節約できることになる。Then, in order to detect the light emitted from the LED chip 25 at this time, the light receiving element 28 is arranged at a marking position 28a indicated by oblique lines in the figure corresponding to the upper part of the AIDC mark 29. As described above, the arrangement position of the light receiving element 28 in the longitudinal direction is selected to be a position corresponding to the longitudinal position of the LED chip 25 that emits light when the image forming operation is not performed. Therefore, at the time of detection, the entire LED array 26 does not need to emit light, so that power consumption can be reduced accordingly. In addition, the consumption of toner can be saved.
なお、正転現像を行なう場合には、AIDCマーク29部分
を除く位置に相当する複数のLEDチップ25が発光される
ことになる。When normal development is performed, a plurality of LED chips 25 corresponding to positions other than the AIDC mark 29 are emitted.
また、像間イレースとは、正規現像における感光体ド
ラム１の周長方向における画像形成に寄与しない領域、
即ち、一枚分の原稿画像の終端位置と次順の原稿画像の
始端位置との間に形成される領域にLEDアレイからの光
を照射して、感光体ドラム１上の残留電荷を除去するこ
とをいう。一方、サイドイレースとは、同様に画像形成
に寄与しない感光体ドラム１の軸長方向両端部にLEDア
レイからの光を照射して、感光体ドラム上の残留電荷を
除去することをいう。In addition, an inter-image erase refers to a region that does not contribute to image formation in the circumferential direction of the photosensitive drum 1 in regular development,
That is, the region formed between the end position of one original image and the start position of the next original image is irradiated with light from the LED array to remove the residual charge on the photosensitive drum 1. That means. On the other hand, the side erase means irradiating light from the LED array to both ends in the axial direction of the photosensitive drum 1 which also do not contribute to image formation, thereby removing residual charges on the photosensitive drum.
従って、かかる正転現像におけるAIDCマークの書き込
み動作、像間レイース及びサイドイレースを行なう際に
光量検出を行なう場合は、該当する領域を照射するLED
チップ25からの光を検出することになるので、これらの
LEDチップ25の配置位置に対応する位置に受光素子28を
設けることになる。Therefore, when detecting the amount of light when performing the AIDC mark writing operation, inter-image laying and side erasing in such normal development, an LED that irradiates the corresponding area is used.
Since light from the chip 25 will be detected, these
The light receiving element 28 is provided at a position corresponding to the arrangement position of the LED chip 25.
そして、上記したAIDCマークの書き込み動作時におけ
る光量制御が第４図に示すタイミングチャートに従って
具体的に行われるのである。即ち、図外のプリンタスタ
ートスイッチがオンされると、第４図（ａ）に示す所定
時間Ｔにわたって原稿１頁分のプリント動作が行われる
ことになるが、この工程中、終盤における時間T1の間は
画像形成を行わない時点に相当する。次いで、第４図
（ｂ）に示すように、この画像形成を行わない時点にお
いて、AIDCマークの書き込み動作がT2時間にわたって行
われることになる。Then, the light amount control during the AIDC mark writing operation described above is specifically performed according to the timing chart shown in FIG. That is, when an unillustrated printer start switch is turned on, but so that the document one page of printing operation is performed for a predetermined time T shown in 4 (a), in this step, the time at the end T 1 The period corresponds to a point in time when image formation is not performed. Next, as shown in FIG. 4 (b), at the time of not performing the image forming, so that the write operation of the AIDC mark is performed over 2 hours T.
そして、第４図（ｃ）に示すように、このAIDCマーク
の書き込み動作中の時間T3にわたって該当するLEDチッ
プ25の光量検出が行われ、この検出結果に従って、次の
プリント動作を実行する場合に、コントローラ34がLED
チップ25の光量制御を行うことになるのである。When as shown in FIG. 4 (c), is appropriate light quantity detection of LED chip 25 over a time T 3 during a write operation of the AIDC mark is performed, in accordance with the detection result, to perform the next printing operation In addition, controller 34 LED
The light amount of the chip 25 is controlled.
なお、かかる制御がコントローラ34により行われるこ
とを示すために、第３図においてプリンタスタート指令
信号及びAIDCマーク書き込み実行指令信号がコントロー
ラ34に入力される様に示してある。In FIG. 3, a printer start command signal and an AIDC mark write execution command signal are shown to be input to the controller 34 in order to show that such control is performed by the controller 34.
発明の効果 以上説明したように、本発明によれば、LEDアレイ及
び収束性光伝送体が密閉状態に収容されたケーシング内
に配設された検出手段により、非画像形成時における画
像濃度制御用マークの書き込みのために発光された際の
前記LEDアレイの発光光量を検出するようにした。この
ため、画像形成に不都合を生じることなくLEDアレイの
光量検出を行える。また、画像濃度制御用マークの書き
込みは、LEDアレイのマーキング位置に対応する箇所だ
けを点灯するため、LEDアレイを無駄に消耗させ、ま
た、トナーを無駄に消費することがない。さらには、LE
Dアレイ、収束性光伝送体及び検出手段が、ケーシング
内に密閉状態に収容されているため、種々の外部要因に
影響されることなく、長期間にわたって安定した光量検
出が可能である。As described above, according to the present invention, the LED array and the convergent light transmitter are arranged in a casing in which the LED array and the convergent light transmitting body are housed in a sealed state. The amount of light emitted from the LED array when light is emitted for writing a mark is detected. Therefore, it is possible to detect the light amount of the LED array without causing any inconvenience in image formation. Further, since the writing of the image density control mark turns on only the portion corresponding to the marking position of the LED array, the LED array is not wasted and the toner is not wasted. Furthermore, LE
Since the D array, the convergent light transmitter, and the detecting means are housed in a sealed state in the casing, stable light quantity detection can be performed for a long period of time without being affected by various external factors.
第１図は本発明に係るLEDプリンタヘッドを感光体ドラ
ムと共に示す一部切欠き側面図、第２図はそのII−II線
による拡大断面図、第３図は制御系を示すブロック図、
第４図は制御動作を示すタイミングチャートである。 １……感光体ドラム、２……LEDプリンタヘッド、21…
…ケーシング、25……LEDチップ、26……LEDアレイ、27
……収束性光伝送体、28……受光素子、29……AIDCマー
ク、32……マイクロプロセッサ、34……コントローラ。FIG. 1 is a partially cutaway side view showing an LED printer head according to the present invention together with a photosensitive drum, FIG. 2 is an enlarged sectional view taken along the line II-II, FIG. 3 is a block diagram showing a control system,
FIG. 4 is a timing chart showing the control operation. 1 ... Photoconductor drum, 2 ... LED printer head, 21 ...
... casing, 25 ... LED chip, 26 ... LED array, 27
… Convergent light transmitter, 28… Light receiving element, 29… AIDC mark, 32… Microprocessor, 34… Controller.
フロントページの続き (56)参考文献 特開 昭61−219187（ＪＰ，Ａ) 特開 昭63−52435（ＪＰ，Ａ) 特開 平１−198370（ＪＰ，Ａ) 特開 昭62−294241（ＪＰ，Ａ) 特開 昭63−141780（ＪＰ，Ａ) 特開 昭51−60182（ＪＰ，Ａ) 実開 平２−17346（ＪＰ，Ｕ) 実開 昭63−46865（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) B41J 2/45 B41J 2/445 B41J 29/46 H01L 33/00 (FI:H01L 33/00 K)Continuation of front page (56) References JP-A-61-219187 (JP, A) JP-A-63-52435 (JP, A) JP-A-1-198370 (JP, A) JP-A-62-294241 (JP) JP-A-63-141780 (JP, A) JP-A-51-60182 (JP, A) JP-A-2-17346 (JP, U) JP-A-63-46865 (JP, U) (58) Surveyed field (Int.Cl. 6 , DB name) B41J 2/45 B41J 2/445 B41J 29/46 H01L 33/00 (FI: H01L 33/00 K)
Claims (1)
送体を介して被帯電物に露光するLEDプリンタヘッドに
おいて、 前記LEDアレイ及び少なくとも前記収束性光伝送体の基
端部を密閉状態に収容するケーシングと、 前記ケーシング内に配設され、前記LEDアレイが発光さ
れた際に入射する光の光量を検出する検出手段と、 非画像形成時における画像濃度制御用マークの書き込み
のために前記LEDアレイが発光された際の前記検出手段
による検出結果に基づき、前記LEDアレイの発光光量を
制御する制御手段と を備えたことを特徴とするLEDプリンタヘッド。1. An LED printer head for exposing an object to be charged with light emitted from an LED array via a convergent light transmitter, wherein the LED array and at least a base end of the convergent light transmitter are sealed. A casing to be housed, a detection unit disposed in the casing, for detecting the amount of light incident when the LED array emits light, and a writing unit for writing an image density control mark during non-image formation. Control means for controlling a light emission amount of the LED array based on a detection result by the detection means when the LED array emits light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32163088A JP2817150B2 (en) | 1988-12-19 | 1988-12-19 | LED printer head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32163088A JP2817150B2 (en) | 1988-12-19 | 1988-12-19 | LED printer head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02164561A JPH02164561A (en) | 1990-06-25 |
| JP2817150B2 true JP2817150B2 (en) | 1998-10-27 |
Family
ID=18134650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32163088A Expired - Lifetime JP2817150B2 (en) | 1988-12-19 | 1988-12-19 | LED printer head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2817150B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06302855A (en) * | 1993-03-29 | 1994-10-28 | Minnesota Mining & Mfg Co <3M> | Optical scanning device |
| US7760215B2 (en) | 2007-07-20 | 2010-07-20 | Seiko Epson Corporation | Line head and an image forming apparatus using the line head |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5160182A (en) * | 1974-11-22 | 1976-05-25 | Nippon Telegraph & Telephone | |
| JPS61219187A (en) * | 1985-03-25 | 1986-09-29 | Toshiba Corp | Light emitting device |
| JPS6352435A (en) * | 1986-08-22 | 1988-03-05 | Hitachi Ltd | Manufacture of opto-electronic device and frame used therefor, and module |
| JPS63141780A (en) * | 1986-12-04 | 1988-06-14 | Seiko Instr & Electronics Ltd | Printer-controlling circuit |
| JPH01198370A (en) * | 1988-02-02 | 1989-08-09 | Nec Corp | Led recording head |
| JPH0217346U (en) * | 1988-07-19 | 1990-02-05 |
-
1988
- 1988-12-19 JP JP32163088A patent/JP2817150B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02164561A (en) | 1990-06-25 |
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