JP2013086502A - Color printer - Google Patents

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Publication number
JP2013086502A
JP2013086502A JP2011232417A JP2011232417A JP2013086502A JP 2013086502 A JP2013086502 A JP 2013086502A JP 2011232417 A JP2011232417 A JP 2011232417A JP 2011232417 A JP2011232417 A JP 2011232417A JP 2013086502 A JP2013086502 A JP 2013086502A
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color
light
color sensor
patch
printer
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Toshihiko Furukawa
利彦 古川
Koichi Matsuda
浩一 松田
Harunori Takeuchi
晴紀 竹内
Daisuke Matsuura
大介 松浦
Kazuyuki Fujimoto
和幸 藤本
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Sinfonia Technology Co Ltd
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Sinfonia Technology Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To accurately perform the calibration of a printer by eliminating the influence of the temporal change of a color sensor.SOLUTION: A reflection patch 21 is arranged in the conveyance path of a roll paper sheet 1 so as to face the color sensor 20 with a conveyance surface of the conveyance path interposed between the reflection patch 21 and the color sensor 20, white light from the light emitting part of the color sensor 20 is reflected by the reflection patch 21 and the resulting reflection light is received by a light receiving part through a filter, the densities of three primary colors are measured and the calibration of the color sensor 20 is performed, so that the influence of the temporal change of the color sensor 20 is eliminated and the calibration of the printer is accurately performed.

Description

本発明は、カラープリンタに関し、特に、キャリブレーション用のカラーセンサを備えたカラープリンタに関する。   The present invention relates to a color printer, and more particularly to a color printer provided with a color sensor for calibration.

サーマルプリンタ、インクジェットプリンタ、レーザプリンタ等のカラープリンタには、プリンタの経時変化、記録紙の感度ばらつき、環境条件等によってカラーの印刷濃度や階調性等のカラー印刷特性が変化する。このため、このようなカラー印刷特性の変化を補正するキャリブレーションを行うために、分光特性を具備するカラーセンサ(濃度計ともいう)を備えたものが多い(例えば、特許文献1、2参照)。   In color printers such as thermal printers, ink jet printers, and laser printers, color printing characteristics such as color printing density and gradation change depending on changes with time of the printer, variations in sensitivity of recording paper, environmental conditions, and the like. For this reason, in order to perform calibration for correcting such a change in color printing characteristics, many have a color sensor (also referred to as a densitometer) having spectral characteristics (see, for example, Patent Documents 1 and 2). .

特許文献1、2に記載されたものでは、記録紙にテストパターンを印刷し、印刷されたテストパターンにおけるイエロー(Y)、マゼンタ(M)、シアン(C)の色の3原色の濃度をカラーセンサで測定し、測定した各色の濃度を基準濃度と比較して、基準濃度と合致させるように、プリンタヘッドに供給するエネルギ量を調整するキャリブレーションを行っている。例えば、サーマルプリンタでは、サーマルヘッドに供給する熱エネルギを調整している。なお、カラーセンサは発光部と受光部を有し、発光部から白色光を発光させ、テストパターンが印刷された記録紙からの反射光を、レッド(R)、グリーン(G)、ブルー(B)の各色成分に対応するフィルタを介して受光部で受光し、各色成分(波長)の強度を受光部のフォトダイオードで検出することにより、色の3原色の濃度を測定するようになっている。   In those described in Patent Documents 1 and 2, a test pattern is printed on a recording sheet, and the density of the three primary colors of yellow (Y), magenta (M), and cyan (C) in the printed test pattern is set as a color. Calibration is performed by adjusting the amount of energy supplied to the printer head so that the measured density of each color is compared with the reference density and matched with the reference density. For example, in a thermal printer, the thermal energy supplied to the thermal head is adjusted. The color sensor has a light emitting portion and a light receiving portion, and emits white light from the light emitting portion, and reflects reflected light from the recording paper on which the test pattern is printed as red (R), green (G), blue (B ) Is received by a light receiving unit through a filter corresponding to each color component, and the intensity of each color component (wavelength) is detected by a photodiode of the light receiving unit, thereby measuring the density of the three primary colors. .

特開平8−194358号公報JP-A-8-194358 特開2000−255108号公報JP 2000-255108 A

特許文献1、2に記載されたカラーセンサを用いてキャリブレーションを行うカラープリンタは、カラーセンサ自体が経時変化によって、発光部や受光部等の特性が変化する。このため、このカラーセンサの経時変化がプリンタのキャリブレーションに影響し、正確なキャリブレーションを阻害する問題がある。   In color printers that perform calibration using the color sensors described in Patent Documents 1 and 2, the characteristics of the light emitting unit, the light receiving unit, and the like change as the color sensor itself changes with time. For this reason, the change with time of the color sensor affects the calibration of the printer, and there is a problem of hindering accurate calibration.

そこで、本発明の課題は、カラーセンサの経時変化の影響をなくして、プリンタのキャリブレーションを正確に行うことができるようにすることである。   Accordingly, an object of the present invention is to eliminate the influence of a color sensor with time and to accurately perform printer calibration.

上記の課題を解決するために、本発明は、発光部から白色光を発光させ、該白色光の反射光を各色成分に対応するフィルタを介して受光部で受光し、色の3原色の濃度を測定するキャリブレーション用のカラーセンサを備え、搬送経路を搬送される記録紙にカラー印刷を施すカラープリンタにおいて、前記カラーセンサの前記発光部からの白色光を反射させて、前記受光部へ入射させる反射パッチを設け、この反射パッチからの反射光を前記フィルタを介して前記受光部で受光し、前記カラーセンサ自体のキャリブレーションを行う構成を採用した。   In order to solve the above-described problems, the present invention causes white light to be emitted from a light emitting unit, and the reflected light of the white light is received by a light receiving unit through a filter corresponding to each color component. In a color printer having a color sensor for calibration that measures color, and performing color printing on a recording sheet conveyed along a conveyance path, the white light from the light emitting part of the color sensor is reflected and incident on the light receiving part A configuration is adopted in which a reflection patch to be provided is provided, light reflected from the reflection patch is received by the light receiving unit through the filter, and the color sensor itself is calibrated.

すなわち、カラーセンサの発光部からの白色光を反射させて、受光部へ入射させる反射パッチを設け、この反射パッチからの反射光をフィルタを介して受光部で受光し、カラーセンサ自体のキャリブレーションを行うことにより、カラーセンサの経時変化の影響をなくして、プリンタのキャリブレーションを正確に行うことができるようにした。   In other words, a reflective patch is provided that reflects white light from the light emitting part of the color sensor and enters the light receiving part. The reflected light from the reflective patch is received by the light receiving part through a filter, and the color sensor itself is calibrated. By performing the above, it is possible to eliminate the influence of the change of the color sensor with the lapse of time and perform the calibration of the printer accurately.

前記反射パッチは、白色光の各色成分を均等に反射し、反射効率の高いものが好ましく、例えば、紙やプラスチック製等の白色板、鏡面仕上げの金属板、鏡等を用いるとよい。   The reflective patch is preferably one that reflects each color component of white light uniformly and has high reflection efficiency. For example, a white plate made of paper or plastic, a mirror-finished metal plate, a mirror, or the like may be used.

前記カラーセンサ自体のキャリブレーションを行うときに、前記搬送経路の搬送面を挟み込むように前記反射パッチを前記カラーセンサと対向配置し、前記カラー印刷を施すときに、前記反射パッチを該反射パッチの反射面を保護する保護手段が設けられた位置に移動させるか、または前記保護手段を該反射パッチの反射面を保護する位置に移動させることにより、反射パッチの反射面に紙粉やインク等が付着しないようにし、反射効率の低下や白色反射光への外乱を防止することができる。   When calibrating the color sensor itself, the reflective patch is disposed opposite to the color sensor so as to sandwich the transport surface of the transport path, and when performing color printing, the reflective patch is placed on the reflective patch. By moving the protective means to a position where a protective means for protecting the reflective surface is provided, or by moving the protective means to a position for protecting the reflective surface of the reflective patch, paper powder, ink or the like is applied to the reflective surface of the reflective patch. It can be prevented from adhering, and a decrease in reflection efficiency and disturbance to white reflected light can be prevented.

本発明に係るカラープリンタは、カラーセンサの発光部からの白色光を反射させて、受光部へ入射させる反射パッチを設け、この反射パッチからの反射光をフィルタを介して受光部で受光し、カラーセンサ自体のキャリブレーションを行うようにしたので、カラーセンサの経時変化の影響をなくして、プリンタのキャリブレーションを正確に行うことができる。   The color printer according to the present invention includes a reflective patch that reflects white light from the light emitting portion of the color sensor and enters the light receiving portion, and receives the reflected light from the reflective patch at the light receiving portion through the filter, Since the color sensor itself is calibrated, the printer can be accurately calibrated without the influence of the color sensor over time.

カラープリンタの実施形態を示す縦断面図Vertical sectional view showing an embodiment of a color printer 図1のカラーセンサと反射パッチの配置部を拡大して示す断面図Sectional drawing which expands and shows the arrangement | positioning part of the color sensor of FIG. 1, and a reflective patch 図2のカラーセンサの構成図Configuration diagram of the color sensor of FIG.

以下、図面に基づき、本発明の実施形態を説明する。このカラープリンタはサーマルプリンタであり、図1に示すように、記録紙のロール紙1を給紙部に装填するリール2と、ロール紙1の外周を押さえる押さえローラ3と、リール2から搬送経路に送り出されるロール紙1を案内する一対のガイドローラ4と、ロール紙1を印刷部に送り込むフィードローラ5と、フィードローラ5にロール紙1を押し付けるピンチローラ6と、一対のボビン7aに巻回されたインクリボン7と、ロール紙1に印刷を施すサーマルヘッド8と、サーマルヘッド8と対向するプラテンローラ9と、印刷されたロール紙1を所定の長さに切断するカッタ10とで基本的に構成されており、切断されたロール紙1は、ケーシング11の前面に設けられた排紙口11aから外部に排出される。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. This color printer is a thermal printer. As shown in FIG. 1, a reel 2 for loading a roll paper 1 of recording paper into a paper feed unit, a pressing roller 3 for pressing the outer periphery of the roll paper 1, and a conveyance path from the reel 2 A pair of guide rollers 4 for guiding the roll paper 1 fed to the printer, a feed roller 5 for feeding the roll paper 1 to the printing unit, a pinch roller 6 for pressing the roll paper 1 against the feed roller 5, and a pair of bobbins 7a. The printed ink ribbon 7, the thermal head 8 that prints on the roll paper 1, the platen roller 9 that faces the thermal head 8, and the cutter 10 that cuts the printed roll paper 1 into a predetermined length. The cut roll paper 1 is discharged to the outside from a paper discharge port 11 a provided on the front surface of the casing 11.

図1および図2に示すように、前記ロール紙1の搬送経路には、印刷部の下流側で、カラーセンサ20と反射パッチ21が搬送面の上下に対向するように配置されている。この搬送経路の上下両側には、ロール紙1を案内する上下のガイド部材12a、12bが設けられ、これらのガイド部材12a、12bの上下に対向する位置に、それぞれ窓13a、13bが形成されている。   As shown in FIGS. 1 and 2, the color sensor 20 and the reflective patch 21 are arranged on the transport path of the roll paper 1 so as to face the top and bottom of the transport surface on the downstream side of the printing unit. Upper and lower guide members 12a and 12b for guiding the roll paper 1 are provided on both upper and lower sides of the transport path, and windows 13a and 13b are formed at positions facing the upper and lower sides of the guide members 12a and 12b, respectively. Yes.

前記上ガイド部材12aの窓13aの部分には、カラーセンサ20が下向きに配置され、下ガイド部材12bの窓13bの下側には、反射パッチ21が反射面21aを上向きにして、カラーセンサ20と対向するように配置されており、後述するカラーセンサ20の発光部20aから発光される白色光が、反射パッチ21の反射面21aで反射されて、受光部20bで受光されるようになっている。   A color sensor 20 is disposed downward on the window 13a of the upper guide member 12a, and a reflective patch 21 is disposed on the lower side of the window 13b of the lower guide member 12b with the reflective surface 21a facing upward. The white light emitted from the light emitting portion 20a of the color sensor 20 described later is reflected by the reflecting surface 21a of the reflecting patch 21 and received by the light receiving portion 20b. Yes.

前記反射パッチ21はプラスチック製の白色板で形成されており、カラー印刷を施すときには、図2中に二点鎖線で示すように、下ガイド部材12bの窓13bの位置から横方向に移動して、反射面21aが保護手段としての下ガイド部材12bで保護されるようになっている。   The reflective patch 21 is formed of a plastic white plate. When color printing is performed, the reflective patch 21 moves laterally from the position of the window 13b of the lower guide member 12b as shown by a two-dot chain line in FIG. The reflection surface 21a is protected by the lower guide member 12b as a protection means.

図3に示すように、前記カラーセンサ20は、白色光を発光する発光部20aと、レッド(R)、グリーン(G)、ブルー(B)の各色成分に対応するフィルタ20cと、フィルタ20cを介して発光部20aからの光を受光する受光部20bとからなり、受光した光の各色成分(波長)の強度を受光部20bのフォトダイオードで検出することにより、色の3原色の濃度を測定する。測定された3原色の濃度は、A/D変換によりディジタル値に変換される。プリンタのカラー印刷特性のキャリブレーションを行うときは、テストパターンを印刷したロール紙1に発光部20aから白色光を照射し、その反射光をフィルタ20cを介して受光部20bで受光し、測定される各色の濃度を変換したディジタル値を、テストパターン用の基準濃度のディジタル値と比較し、サーマルヘッド8に供給する熱エネルギを調整する。   As shown in FIG. 3, the color sensor 20 includes a light emitting unit 20a that emits white light, a filter 20c corresponding to each color component of red (R), green (G), and blue (B), and a filter 20c. A light receiving unit 20b that receives light from the light emitting unit 20a, and measures the densities of the three primary colors by detecting the intensity of each color component (wavelength) of the received light with a photodiode of the light receiving unit 20b. To do. The measured densities of the three primary colors are converted into digital values by A / D conversion. When calibrating the color printing characteristics of the printer, the roll paper 1 on which the test pattern is printed is irradiated with white light from the light emitting unit 20a, and the reflected light is received by the light receiving unit 20b through the filter 20c and measured. The digital value obtained by converting the density of each color is compared with the digital value of the reference density for the test pattern, and the thermal energy supplied to the thermal head 8 is adjusted.

前記カラーセンサ20自体のキャリブレーションを行うときは、前記搬送経路にロール紙1がない状態で、発光部20aからの白色光を反射パッチ21の反射面21aで反射させ、その反射光をフィルタ20cを介して受光部20bで受光して、3原色の濃度を測定する。そして、これらの測定された各色の濃度を変換したディジタル値を、センサキャリブレーション用の基準濃度のディジタル値と比較し、発光部20aから発光する白色光の光量を調整する。各受光部20bの感度を調整するようにしてもよい。   When the color sensor 20 itself is calibrated, white light from the light emitting unit 20a is reflected by the reflecting surface 21a of the reflecting patch 21 without the roll paper 1 in the transport path, and the reflected light is filtered by the filter 20c. Then, the light receiving unit 20b receives the light and measures the densities of the three primary colors. Then, the digital value obtained by converting the density of each measured color is compared with the digital value of the reference density for sensor calibration, and the amount of white light emitted from the light emitting unit 20a is adjusted. You may make it adjust the sensitivity of each light-receiving part 20b.

上述した実施形態では、反射パッチをプラスチック製の白色板としたが、反射パッチは他の白色板、鏡面仕上げの金属板、鏡等とすることもできる。   In the embodiment described above, the reflective patch is a plastic white plate, but the reflective patch may be another white plate, a mirror-finished metal plate, a mirror, or the like.

上述した実施形態では、カラー印刷時に反射パッチを移動させて、搬送経路のガイド部材を利用した保護手段で反射面を覆うようにしたが、反射パッチを固定して、移動する保護手段で反射面を覆うようにしてもよい。   In the above-described embodiment, the reflective patch is moved during color printing, and the reflective surface is covered with the protective means using the guide member of the transport path. However, the reflective patch is fixed and the reflective surface is covered with the protective means that moves. May be covered.

上述した実施形態では、カラープリンタをサーマルプリンタとしたが、本発明に係るカラープリンタは、インクジェットプリンタやレーザプリンタにも適用することができる。   In the above-described embodiment, the color printer is a thermal printer. However, the color printer according to the present invention can also be applied to an inkjet printer or a laser printer.

1 ロール紙
2 リール
3 押さえローラ
4 ガイドローラ
5 フィードローラ
6 ピンチローラ
7 インクリボン
7a ボビン
8 サーマルヘッド
9 プラテンローラ
10 カッタ
11 ケーシング
11a 排紙口
12a、12b ガイド部材
13a、13b 窓
20 カラーセンサ
20a 発光部
20b 受光部
20c フィルタ
21 反射パッチ
21a 反射面
DESCRIPTION OF SYMBOLS 1 Roll paper 2 Reel 3 Pressing roller 4 Guide roller 5 Feed roller 6 Pinch roller 7 Ink ribbon 7a Bobbin 8 Thermal head 9 Platen roller 10 Cutter 11 Casing 11a Paper discharge port 12a, 12b Guide member 13a, 13b Window 20 Color sensor 20a Light emission Part 20b light-receiving part 20c filter 21 reflection patch 21a reflection surface

Claims (2)

発光部から白色光を発光させ、該白色光の反射光を各色成分に対応するフィルタを介して受光部で受光し、色の3原色の濃度を測定するキャリブレーション用のカラーセンサを備え、搬送経路を搬送される記録紙にカラー印刷を施すカラープリンタにおいて、前記カラーセンサの前記発光部からの白色光を反射させて、前記受光部へ入射させる反射パッチを設け、この反射パッチからの反射光を前記フィルタを介して前記受光部で受光し、前記カラーセンサ自体のキャリブレーションを行うことを特徴とするカラープリンタ。   A calibration color sensor that emits white light from the light emitting unit, receives the reflected light of the white light at the light receiving unit through a filter corresponding to each color component, and measures the densities of the three primary colors is provided and transported. In a color printer that performs color printing on a recording sheet conveyed along a path, a reflection patch that reflects white light from the light emitting unit of the color sensor and enters the light receiving unit is provided, and reflected light from the reflection patch A color printer, wherein the light receiving unit receives light through the filter and calibrates the color sensor itself. 前記カラーセンサ自体のキャリブレーションを行うときに、前記搬送経路の搬送面を挟み込むように前記反射パッチを前記カラーセンサと対向配置し、前記カラー印刷を施すときに、前記反射パッチを該反射パッチの反射面を保護する保護手段が設けられた位置に移動させるか、または前記保護手段を該反射パッチの反射面を保護する位置に移動させるようにした請求項1に記載のカラープリンタ。   When calibrating the color sensor itself, the reflective patch is disposed opposite to the color sensor so as to sandwich the transport surface of the transport path, and when performing color printing, the reflective patch is placed on the reflective patch. The color printer according to claim 1, wherein the color printer is moved to a position where a protective means for protecting the reflective surface is provided, or the protective means is moved to a position for protecting the reflective surface of the reflective patch.
JP2011232417A 2011-10-24 2011-10-24 Color printer Pending JP2013086502A (en)

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JPH06189075A (en) * 1992-12-19 1994-07-08 Ricoh Co Ltd Image reader
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WO2022209527A1 (en) * 2021-04-01 2022-10-06 日本たばこ産業株式会社 Aerosol generation apparatus

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