JP2003127446A - Recording/erasing apparatus for reversible thermal recording medium - Google Patents
Recording/erasing apparatus for reversible thermal recording mediumInfo
- Publication number
- JP2003127446A JP2003127446A JP2001326141A JP2001326141A JP2003127446A JP 2003127446 A JP2003127446 A JP 2003127446A JP 2001326141 A JP2001326141 A JP 2001326141A JP 2001326141 A JP2001326141 A JP 2001326141A JP 2003127446 A JP2003127446 A JP 2003127446A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- reversible thermosensitive
- laser light
- laser
- erasing apparatus
- 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.)
- Granted
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
- B41J2/475—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 for heating selectively by radiation or ultrasonic waves
- B41J2/4753—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 for heating selectively by radiation or ultrasonic waves using thermosensitive substrates, e.g. paper
-
- 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
- B41J2/47—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 the combination of scanning and modulation of light
- B41J2/471—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 the combination of scanning and modulation of light using dot sequential main scanning by means of a light deflector, e.g. a rotating polygonal mirror
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Electronic Switches (AREA)
Abstract
Description
【０００１】本発明は、熱エネルギーの作用により、可
視情報の記録，消去が可能な可逆性感熱記録媒体に、そ
の可視情報の記録，消去を行う可逆性感熱記録媒体の記
録消去装置に関するものである。The present invention relates to a reversible thermosensitive recording medium recording / erasing apparatus for recording / erasing visible information on / from a reversible thermosensitive recording medium capable of recording / erasing visible information by the action of thermal energy. is there.
【０００２】[0002]
【従来の技術】図１０は、可逆性感熱記録媒体の一般的
構成を説明する図である。この可逆性感熱記録媒体６０
は、リライトカードと称して、一部実施されており、例
えば、図１０（Ａ）に示すように、カード基材６１上
に、可逆性感熱記録層６２が設けられており、必要に応
じて、ＩＣモジュール６３が搭載されたり、エンボス文
字６４が形成されたりしている。2. Description of the Related Art FIG. 10 is a diagram for explaining a general structure of a reversible thermosensitive recording medium. This reversible thermosensitive recording medium 60
Is partially implemented as a rewrite card. For example, as shown in FIG. 10 (A), a reversible thermosensitive recording layer 62 is provided on a card base material 61. , The IC module 63 is mounted, and the embossed character 64 is formed.
【０００３】この可逆性感熱記録層６２は、樹脂母材
と、この樹脂母材中に分散された有機低分子物質とを主
成分とする感熱記録材料（例えば、特許第２７００２３
４号等）やロイコ染料を用いた感熱記録材料（例えば、
特開平１１−１５１８５６号等）を有しており、図１０
（Ｂ）に示すように、記録及び消去を行っていた。The reversible thermosensitive recording layer 62 comprises a resin base material and an organic low molecular weight substance dispersed in the resin base material as main components (for example, Japanese Patent No. 270023).
No. 4) or a leuco dye (for example, a thermal recording material (for example,
JP-A-11-151856), and FIG.
Recording and erasing were performed as shown in (B).
【０００４】まず、感熱記録材料は、常温Ｔ０のときＤ
の状態（消去状態）であるとする。この感熱記録材料
は、記録したい部位の温度を、Ｔ１→Ｔ２→Ｔ３に上げ
ると、カーブに沿って、ＤからＣさらにＥへと状態が変
化する。Ｅの状態は、これ以上温度を上げても濃度が変
化しない状態である。このＥの状態をへて、温度をＴ３
からＴ０まで下げることによって、低反射状態、すなわ
ち、Ａの状態（記録状態）となる。First, the thermal recording material is D
The state (erased state) is assumed. This heat-sensitive recording material changes its state from D to C and then E along the curve when the temperature of the portion to be recorded is increased from T1 to T2 to T3. The state of E is a state in which the concentration does not change even if the temperature is further raised. With this E condition, the temperature is changed to T3.
By lowering from T0 to T0, the low reflection state, that is, the state of A (recording state) is obtained.
【０００５】いま、感熱記録材料は、常温Ｔ０のとき
に、Ａの状態（記録状態）であるとする。そして、この
感熱記録材料は、所望部位の温度を、Ｔ１→Ｔ２に上げ
ると、カーブに沿って、ＢからＣへと状態が変化し、 最
大反射濃度に達する。ここで、温度をＴ０に下げると、
反射濃度は、そのまま保持されＤの状態（消去状態）と
なる。Now, it is assumed that the thermosensitive recording material is in the state A (recording state) at room temperature T0. Then, when the temperature of the desired portion is raised from T1 to T2, this heat-sensitive recording material changes its state from B to C along the curve and reaches the maximum reflection density. Here, if the temperature is lowered to T0,
The reflection density is maintained as it is and is in the D state (erased state).
【０００６】従って、可逆性感熱記録層６２は、上記の
ような感熱記録材料の表面に、熱を選択的に印加するこ
とにより、所望の部位を加熱して、透明地に白濁の可視
情報を形成したり、白濁地に透明の可視情報を形成する
ことができ、その変化は、何回も繰り返することが可能
である。また、このような感熱記録材料の背面に着色層
を形成すれば、白地に着色層の色の可視情報又は着色層
の色の地に、白色の可視情報を形成することができる。Therefore, the reversible thermosensitive recording layer 62 heats a desired portion by selectively applying heat to the surface of the thermosensitive recording material as described above, and the visible information of white turbidity on the transparent background is obtained. It can be formed or transparent visible information can be formed on a cloudy place, and the change can be repeated many times. Further, by forming a colored layer on the back surface of such a thermal recording material, it is possible to form visible information of the color of the colored layer on a white background or visible information of white on the background of the colored layer.
【０００７】[0007]
【発明が解決しようとする課題】図１１，図１２は、可
逆性感熱記録媒体の描画に関する課題を説明する図であ
る。可逆性感熱記録媒体６０は、可逆性感熱記録層６２
にレーザ光を照射することによって、可視情報を記録又
は消去する。例えば、図１１（ａ）に示すように、数字
の「４」を印字するような場合に、印字する軌跡は、
→→→となる。このとき、図１２（ａ）に示すよ
うに、→を印字するときに、Ｂ，Ａ，Ｄ点を、所定
の条件Ｉ（例えば、レーザパワー：０．６Ｗ，レーザ照
射時間：１点当たり、１ｍｓ）で印字し、引き続き、
→を印字するときに、Ｅ，Ａ，Ｃ点を、上記と同一の
条件Ｉで印字する［図１２（ａ）参照］。このため、２
回目の描画点Ａは、１回目の描画点Ａと同じスポット径
であり［図１２（ｂ）］、熱の分布も同じであるので
［図１２（ｃ）］、描画線は、同じ太さのイメージとな
る［図１２（ｄ）］。FIG. 11 and FIG. 12 are views for explaining a problem relating to drawing on a reversible thermosensitive recording medium. The reversible thermosensitive recording medium 60 includes a reversible thermosensitive recording layer 62.
The visible information is recorded or erased by irradiating a laser beam on the. For example, as shown in FIG. 11A, when the number “4” is printed, the locus to be printed is
→→→ At this time, as shown in FIG. 12A, when printing →, points B, A, and D are set to a predetermined condition I (for example, laser power: 0.6 W, laser irradiation time: per point, 1 ms) and then continue
When printing →, points E, A, and C are printed under the same condition I as above [see FIG. 12 (a)]. Therefore, 2
The drawing point A of the first time has the same spot diameter as that of the drawing point A of the first time [FIG. 12 (b)], and since the heat distribution is the same [FIG. 12 (c)], the drawing line has the same thickness. [Fig. 12 (d)].
【０００８】このように、交差点では、描画線の重複す
る部分（Ａ点）は、レーザ光が２回照射されることにな
る。このため、レーザ光照射により、高いエネルギーを
受けた部分は、図１１（ｂ）の二点鎖線で示すように、
その部分だけ、強い熱ダメージを受け、描画線も太くな
る。つまり、Ｂ，Ａ，Ｄ点で描画することによって、そ
の部分の温度が上がる。この温度が下がらないうちに、
Ｅ，Ａ，Ｃ点の描画がなされる。よって、交差点Ａは、
広い範囲に熱が広がってしまう。この熱ダメージが繰り
返されることによって、可逆性感熱記録層６２を構成す
る感熱記録材の劣化が進み、やがて、リライトできなく
なるばかりでなく、印字品質が低下する可能性があっ
た。As described above, at the intersection, the portion where the drawing lines overlap (point A) is irradiated with the laser light twice. Therefore, as shown by the chain double-dashed line in FIG.
Only that part receives strong heat damage, and the drawing line becomes thick. That is, by drawing at points B, A, and D, the temperature of that portion rises. Before this temperature drops,
The points E, A, and C are drawn. Therefore, at intersection A,
The heat spreads over a wide area. By repeating this heat damage, deterioration of the heat-sensitive recording material forming the reversible heat-sensitive recording layer 62 progresses, and in the end, not only rewriting cannot be performed but also print quality may deteriorate.
【０００９】また、上述した可逆性感熱材料は、あるエ
ネルギーレベルを越えると飽和してしまうので、発色後
に加えるエネルギーは、印字品質を上げるためには、全
く無駄なエネルギーである。Further, the above-mentioned reversible thermosensitive material is saturated when the energy level exceeds a certain level, so the energy applied after color development is completely useless energy for improving the printing quality.
【００１０】本発明の課題は、印字品質を維持しつつ、
局所的な熱ダメージを軽減して、感熱記録材の劣化を防
止することができる可逆性感熱記録媒体の記録消去装置
を提供することである。An object of the present invention is to maintain print quality while
It is an object of the present invention to provide a recording / erasing apparatus for a reversible thermosensitive recording medium, which can reduce local heat damage and prevent deterioration of the thermosensitive recording material.
【００１１】[0011]
【課題を解決するための手段】前記課題を解決するため
に、請求項１の発明は、熱エネルギーの作用により、可
視情報の記録及び／又は消去が可能な可逆性感熱記録媒
体に、前記可視情報の記録及び／又は消去を行う可逆性
感熱記録媒体の記録消去装置において、レーザ光照射部
からレーザ光を照射するレーザ光照射手段と、前記レー
ザ光照射手段の照射制御を行う制御手段と、を備え、前
記制御手段は、前記レーザ光の描画点に照射されるエネ
ルギーを、その描画点ごとに制御すること、を特徴とす
る可逆性感熱記録媒体の記録消去装置である。In order to solve the above-mentioned problems, the invention according to claim 1 provides a reversible thermosensitive recording medium capable of recording and / or erasing visible information by the action of thermal energy. In a recording and erasing apparatus for a reversible thermosensitive recording medium for recording and / or erasing information, a laser light irradiating means for irradiating a laser light from a laser light irradiating section, and a control means for controlling irradiation of the laser light irradiating means The recording / erasing device for a reversible thermosensitive recording medium, characterized in that the control means controls the energy applied to the drawing point of the laser light for each drawing point.
【００１２】請求項２の発明は、請求項１に記載の可逆
性感熱記録媒体の記録消去装置において、前記制御手段
は、前記レーザ光の描画線が交差する場合に、交差する
描画点に照射されるレーザ光のパワー及び／又は照射時
間を少なくするように制御すること、を特徴とする可逆
性感熱記録媒体の記録消去装置である。According to a second aspect of the present invention, in the recording / erasing apparatus for the reversible thermosensitive recording medium according to the first aspect, when the drawing lines of the laser beam intersect, the control means irradiates the intersecting drawing points. The recording and erasing apparatus for a reversible thermosensitive recording medium is characterized by controlling the power and / or irradiation time of the laser light to be generated.
【００１３】請求項３の発明は、請求項１に記載の可逆
性感熱記録媒体の記録消去装置において、前記制御手段
は、前記レーザ光の描画線が折り返す場合に、折り返し
点に隣接する描画点に照射されるレーザ光のパワー及び
／又は照射時間を少なくするように制御すること、を特
徴とする可逆性感熱記録媒体の記録消去装置である。According to a third aspect of the present invention, in the recording / erasing apparatus for the reversible thermosensitive recording medium according to the first aspect, the control means, when the drawing line of the laser beam is folded back, is a drawing point adjacent to the turning point. A recording / erasing apparatus for a reversible thermosensitive recording medium, characterized in that the power and / or the irradiation time of the laser beam applied to the recording medium is controlled to be reduced.
【００１４】請求項４の発明は、請求項１に記載の可逆
性感熱記録媒体の記録消去装置において、前記制御手段
は、前記レーザ光の描画線が連続する場合に、連続点を
構成する所定間隔ごとの描画点に照射されるレーザ光の
パワー及び／又は照射時間を少なくするように制御する
こと、を特徴とする可逆性感熱記録媒体の記録消去装置
である。According to a fourth aspect of the present invention, in the recording / erasing apparatus for the reversible thermosensitive recording medium according to the first aspect, the control means defines a predetermined continuous point when the drawing line of the laser beam is continuous. A recording / erasing apparatus for a reversible thermosensitive recording medium, characterized in that the power and / or the irradiation time of the laser light applied to the drawing points for each interval is controlled to be reduced.
【００１５】[0015]
【発明の実施の形態】以下、図面等を参照して、本発明
の実施の形態について、さらに詳しくに説明する。
（第１実施形態）図１は、本発明による可逆性感熱記録
媒体の記録消去装置の第１実施形態を示すブロック図で
ある。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. (First Embodiment) FIG. 1 is a block diagram showing a first embodiment of a recording / erasing apparatus for a reversible thermosensitive recording medium according to the present invention.
【００１６】この実施形態の記録消去装置５０は、熱エ
ネルギーの作用により、可視情報の記録・消去が可能な
リライトカード（可逆性感熱記録媒体）６０に、可視情
報の記録・消去を行う装置であって、レーザ光照射装置
１０と、走査装置２０と、移動装置３０と、搬送装置４
０等とを備えている。The recording / erasing apparatus 50 of this embodiment is an apparatus for recording / erasing visible information on a rewrite card (reversible thermosensitive recording medium) 60 capable of recording / erasing visible information by the action of thermal energy. That is, the laser light irradiation device 10, the scanning device 20, the moving device 30, and the transport device 4
It has 0 and so on.
【００１７】レーザ光照射装置１０は、レーザ光を照射
する装置であり、レーザダイオード（ＬＤ）ドライバ１
１と，レーザダイオード（ＬＤ）１２と，光ファイバ１
３と、レンズヘッド（レーザ光照射部）１４等とを備え
ている。The laser light irradiating device 10 is a device for irradiating laser light, and includes a laser diode (LD) driver 1.
1, a laser diode (LD) 12, and an optical fiber 1
3 and a lens head (laser light irradiation unit) 14 and the like.
【００１８】走査装置２０は、レンズヘッド１４から照
射されたレーザ光を、リライトカード６０のＹ軸方向に
走査する装置であり、Ｙ軸モータの出力軸に固定された
Ｙ軸スキャニングミラー２２を備えている。The scanning device 20 is a device for scanning the laser light emitted from the lens head 14 in the Y-axis direction of the rewrite card 60, and includes a Y-axis scanning mirror 22 fixed to the output shaft of the Y-axis motor. ing.
【００１９】スキャニングミラー２２は、矩形で細長い
帯状のミラーであり、その回転軸方向のサイズが、リラ
イトカード６０（図１０参照）の可逆性感熱記録層６３
の有効記録領域の長手方向のサイズａ0 と同じサイズに
してある。このサイズにすれば、リライトカード６０に
対して、回転軸方向には、レンズヘッド１４を移動する
だけでよく、スキャニングミラー２２の移動が不要とな
るからである。The scanning mirror 22 is a rectangular elongated strip-shaped mirror whose size in the direction of the rotation axis is the reversible thermosensitive recording layer 63 of the rewrite card 60 (see FIG. 10).
The effective recording area has the same size as the longitudinal size a 0 . With this size, the lens head 14 need only be moved in the direction of the rotation axis with respect to the rewrite card 60, and the movement of the scanning mirror 22 is not necessary.
【００２０】一方、回転軸と直交する方向のサイズが、
レーザ光を受けることできる最小幅としてある。このサ
イズにすれば、小型かつ軽量となり、小さなＹ軸モータ
で駆動できるからである。また、可逆性感熱記録層６３
の有効記録領域の短手方向のサイズｂ0 は、狭い幅にす
れば、スキャニングミラー２２の回転角θが小さくて済
むので、従来例のように、焦点距離補正光学系は不要で
ある。具体的には、可逆性感熱記録層６３の有効記録領
域がａ0 ×ｂ0 ＝６０×１２ｍｍであり、スキャニング
ミラー２２の回転角θ＝±１１度の場合に、スキャニン
グミラー２２の有効サイズは、ａ×ｂ＝６０×８ｍｍと
してある。On the other hand, the size in the direction orthogonal to the rotation axis is
This is the minimum width that can receive the laser light. This is because this size is small and lightweight, and can be driven by a small Y-axis motor. In addition, the reversible thermosensitive recording layer 63
If the size b 0 of the effective recording area in the lateral direction is made narrow, the rotation angle θ of the scanning mirror 22 can be small, so that the focal length correcting optical system is not required unlike the conventional example. Specifically, when the effective recording area of the reversible thermosensitive recording layer 63 is a 0 × b 0 = 60 × 12 mm and the rotation angle θ of the scanning mirror 22 is ± 11 degrees, the effective size of the scanning mirror 22 is , A × b = 60 × 8 mm.
【００２１】移動装置３０は、レンズヘッド１４をＸ軸
方向に移動する装置である。搬送装置４０は、リライト
カード６０をカード挿入口（不図示）から、記録・消去
位置に搬送する装置である。The moving device 30 is a device for moving the lens head 14 in the X-axis direction. The transport device 40 is a device that transports the rewrite card 60 from a card insertion slot (not shown) to a recording / erasing position.
【００２２】制御部５１は、描画情報に基づいて、走査
装置２０，移動装置３０などを駆動しながら、レンズヘ
ッド１４からレーザ光を選択的に照射する。また、搬送
装置４０を駆動して、リライトカード６０をカード挿入
口と記録・消去位置との間で搬送する制御等を行なう。
なお、制御部５１には、可視情報を入力するキーボード
などの操作部５２や、その可視情報やその他の情報等
を、目視により確認するためのＣＲＴ等の表示部５３も
接続されている。The control unit 51 selectively irradiates the laser light from the lens head 14 while driving the scanning device 20, the moving device 30, etc. based on the drawing information. Further, the conveyance device 40 is driven to control the conveyance of the rewrite card 60 between the card insertion slot and the recording / erasing position.
An operation unit 52 such as a keyboard for inputting visible information and a display unit 53 such as a CRT for visually confirming the visible information and other information are also connected to the control unit 51.
【００２３】この実施形態の可逆性性感熱記録媒体（リ
ライトカード）６０は、以下のような仕様のものが用い
られている。感熱記録層（リライト部）６２は、保護層
（約５μｍ），近赤外線吸収層（約１μｍ≒７９６ｎ
ｍ），記録層（白濁タイプ，約１０μｍ），光反射層
（約０．０６５μｍ），透明基材（ＰＥＴ，約２５μ
ｍ），接着剤層（約４μｍ）の層構成のものを使用し
た。近赤外線吸収剤は、フタロシアニン系染料［約１μ
ｍ厚の吸収層の中に、固形分として、約７．４ｗｔ％
（バインダ／吸収剤＝１００／８）］を添加したもので
ある。The reversible thermosensitive recording medium (rewrite card) 60 of this embodiment has the following specifications. The thermal recording layer (rewrite part) 62 includes a protective layer (about 5 μm) and a near infrared absorbing layer (about 1 μm≈796n).
m), recording layer (white turbid type, about 10 μm), light reflection layer (about 0.065 μm), transparent substrate (PET, about 25 μm)
m) and an adhesive layer (about 4 μm). The near-infrared absorber is a phthalocyanine dye [about 1 μm
About 7.4 wt% as solid content in the m-thick absorption layer
(Binder / absorbent = 100/8)] is added.
【００２４】第１実施形態では、制御部５１は、前述し
た図１１（Ａ）のＡ点に照射されるレーザエネルギー
を、ドット毎に、レーザパワー，レーザ照射時間をコン
トロールして軽減する。制御部５１は、印字時のレーザ
照射条件を、以下のように設定することができる。In the first embodiment, the control unit 51 reduces the laser energy applied to point A in FIG. 11A described above by controlling the laser power and the laser irradiation time for each dot. The control unit 51 can set the laser irradiation conditions at the time of printing as follows.
【００２５】（条件Ｉ）
レーザパワー ： ０．６Ｗ
レーザ照射時間 ： １点当たり、１ｍｓ
（条件II） 条件Ｉの照射時間（パルス幅）を短くした
条件
レーザパワー ： ０．６Ｗ
レーザ照射時間 ： １点当たり、０．５ｍｓ
（条件III ） 条件Ｉのレーザパワー（パルス高）を短
くした条件
レーザパワー ： ０．３Ｗ
レーザ照射時間 ： １点当たり、１ｍｓ
（条件IV） 条件Ｉの照射時間（パルス幅）及びレーザ
パワー（パルス高）を短くした条件
レーザパワー ： ０．３Ｗ
レーザ照射時間 ： １点当たり、０．５ｍｓ(Condition I) Laser power: 0.6 W Laser irradiation time: 1 ms per point (Condition II) Condition I irradiation time (pulse width) is shortened Laser power: 0.6 W Laser irradiation time: 1 0.5ms per point (Condition III) Condition I laser power (pulse height) is shortened Laser power: 0.3W Laser irradiation time: 1ms per point (Condition IV) Condition I irradiation time (pulse width) ) And the condition where the laser power (pulse height) is shortened Laser power: 0.3 W Laser irradiation time: 0.5 ms per point
【００２６】これらの条件Ｉ〜IVは、一例であって、使
用する可逆性感熱記録媒体に合わせて、適宜設定するこ
とが好ましい。また、Ａ点のみコントロールしても、熱
ダメージが軽減しない場合もある。この場合には、Ａ点
に隣接するＢ点，Ｃ点，Ｄ点，Ｅ点なども合わせてコン
トロールすればよい。These conditions I to IV are merely examples, and it is preferable to set them appropriately according to the reversible thermosensitive recording medium to be used. Moreover, even if only the point A is controlled, the thermal damage may not be reduced. In this case, the points B, C, D, E, etc. adjacent to the point A may be controlled together.
【００２７】図２〜図５は、第１実施形態による記録消
去装置のレーザ照射エネルギーをコントロールする第１
〜第４の手法を説明する図である。図２に示す第１の手
法は、Ａ点には、２回照射しないようにしたものであ
り、２回目の描画点Ａは、間引いている。つまり、→
を印字する場合には、Ａ点は、条件Ｉで印字するが、
→を印字する場合には、Ａ点は印字しない［図２
（ａ）参照］。このため、２回目の描画点Ａは、照射さ
れないので［図２（ｂ），（ｃ）］、描画線は、細くな
ったイメージとなる［図２（ｄ）］。2 to 5 show a first embodiment for controlling the laser irradiation energy of the recording / erasing apparatus according to the first embodiment.
-It is a figure explaining the 4th method. In the first method shown in FIG. 2, the point A is not irradiated twice, and the drawing point A for the second time is thinned out. That is, →
When printing, point A is printed under condition I
When printing →, point A is not printed [Fig. 2
(See (a)]. Therefore, the drawing point A for the second time is not irradiated [FIGS. 2B and 2C], and the drawing line becomes a thin image [FIG. 2D].
【００２８】従って、図２（ｅ）に示すように、２回目
のＡ点の照射エネルギーは、少ないけれど、１回目のＡ
点のエネルギーにより残留した熱と足されて、発色に足
りる必要かつ十分なエネルギーが与えられ、印字品質を
確保しつつ、最低の熱ダメージによって、印字すること
が可能となる。Therefore, as shown in FIG. 2 (e), although the irradiation energy at point A at the second time is small, the irradiation energy at the first time is A.
The energy of the spots is added to the residual heat to give necessary and sufficient energy sufficient for color development, and printing can be performed with the minimum heat damage while ensuring the printing quality.
【００２９】図３に示す第２の手法は、Ａ点に照射され
るレーザエネルギーを、レーザ照射時間をコントロール
して軽減しようとするものである。つまり、→を印
字する場合には、Ａ点は、条件Ｉで印字するが、→
を印字する場合には、Ａ点は、条件IIで印字する［図３
（ａ）参照］。このため、２回目の描画点Ａは、熱の分
布も小さいので［図３（ｂ），（ｃ）］、描画線は、細
くなったイメージとなる［図３（ｄ）］。ここで、図３
（ｂ）は、レーザー光のスポットサイズを示したもので
はなく、図３（ｃ）の熱分布を、平面図的なイメージで
示したものである。感熱記録層６２は、レーザー光その
ものに反応するわけではなく、レーザー光が照射される
ことによる熱エネルギーで反応する。また、レーザー光
そのものは、パワー及び／又は時間を制御しても、スポ
ットサイズは変化しない。このため、実際には、スポッ
トサイズは変化しないが、最終的な結果から見ると、ス
ポットサイズを変化させているのと同じ効果になるの
で、上記ように図示した。なお、以下の例でも同様であ
る。The second method shown in FIG. 3 is to reduce the laser energy applied to point A by controlling the laser irradiation time. In other words, when printing →, point A is printed under condition I, but →
When printing, print point A under condition II [Fig. 3
(See (a)]. Therefore, since the heat distribution is small at the second drawing point A [FIGS. 3B and 3C], the drawing line becomes a thin image [FIG. 3D]. Here, FIG.
FIG. 3B does not show the spot size of the laser beam, but shows the heat distribution of FIG. 3C in a plan view image. The heat-sensitive recording layer 62 does not react with the laser light itself, but reacts with the thermal energy generated by the irradiation of the laser light. Further, the laser light itself does not change the spot size even if the power and / or the time are controlled. Therefore, the spot size does not actually change, but the final result shows the same effect as changing the spot size. The same applies to the following examples.
【００３０】図４に示す第３の手法は、Ａ点に照射され
るレーザエネルギーを、レーザパワーをコントロールし
て軽減しようとするものである。つまり、→を印字
する場合には、Ａ点は、条件Ｉで印字するが、→を
印字する場合には、Ａ点は、条件III で印字する［図４
（ａ）参照］。このため、２回目の描画点Ａは、熱の分
布が小さいので［図４（ｂ），（ｃ）］、描画線は、細
くなったイメージとなる［図４（ｄ）］。The third method shown in FIG. 4 is to reduce the laser energy applied to point A by controlling the laser power. In other words, when → is printed, point A is printed under condition I, but when → is printed, point A is printed under condition III [Fig.
(See (a)]. Therefore, since the heat distribution is small at the second drawing point A [FIGS. 4B and 4C], the drawing line has a thin image [FIG. 4D].
【００３１】図５に示す第４の手法は、Ａ点に照射され
るレーザエネルギーを、レーザパワー及びレーザ照射時
間をコントロールして軽減しようとするものである。つ
まり、→を印字する場合には、Ａ点は、条件Ｉで印
字するが、→を印字する場合には、Ａ点は、条件IV
で印字する［図５（ａ）参照］。このため、２回目の描
画点Ａは、熱の分布がさらに小さいので［図５（ｂ），
（ｃ）］、描画線は、さらに細くなったイメージとなる
［図５（ｄ）］。The fourth method shown in FIG. 5 is to reduce the laser energy applied to the point A by controlling the laser power and the laser irradiation time. That is, when → is printed, point A is printed under condition I, but when → is printed, point A is printed under condition IV.
To print [see FIG. 5 (a)]. Therefore, since the heat distribution is smaller at the second drawing point A [Fig. 5 (b),
(C)], the drawing line becomes a thinner image [FIG. 5 (d)].
【００３２】このように、第１実施形態によれば、レー
ザ光の描画線が交差するような場合に、交差する描画点
Ａに照射されるレーザ光のパワー及び／又は照射時間を
少なくするように制御するので、Ａ点には、発色に足り
る必要かつ十分なエネルギーが与えられ、印字品質を確
保しつつ、最低の熱ダメージによって、印字することが
可能となる。As described above, according to the first embodiment, when the drawing lines of the laser light intersect, the power and / or the irradiation time of the laser light applied to the intersecting drawing point A is reduced. Since the point A is supplied with the necessary and sufficient energy sufficient for color development, it is possible to print with the minimum heat damage while ensuring the print quality.
【００３３】ここで、照射時間を制御する場合には、制
御が簡単なうえ、定量的な制御ができる利点があり、低
出力のレーザーを使用しても、照射時間を長くすれば、
印字可能となる。一方、パワーを制御する場合には、印
字時間が制限されているときでも、照射ダメージを軽減
することができる。なお、高出力のレーザーを使用した
場合であって、照射時間を短くしても、ダメージを与え
てしまうときには、パワーを制御しなければ、ダメージ
を軽減できない。さらに、照射時間及びパワーを制御す
る場合には、上述した照射時間制御の長所、パワー制御
の長所を合わせ持つことができ、非常にきめ細かな制御
が可能となる。Here, in the case of controlling the irradiation time, there is an advantage that the control is simple and quantitative control is possible. Even if a low output laser is used, if the irradiation time is lengthened,
Can be printed. On the other hand, when the power is controlled, the irradiation damage can be reduced even when the printing time is limited. If a high-power laser is used and the damage is caused even if the irradiation time is shortened, the damage cannot be reduced unless the power is controlled. Further, when controlling the irradiation time and the power, it is possible to combine the advantages of the irradiation time control and the power control described above, and it is possible to perform very fine control.
【００３４】（第２実施形態）図６，図７は、第２実施
形態による記録消去装置のレーザ照射エネルギーをコン
トロールする手法を説明する図である。なお、以下に示
す各実施形態では、前述した第１実施形態と同様な機能
を果たす部分には、同一の符号を付して、重複する図面
や説明を適宜省略する。第２実施形態では、制御部５１
は、レーザ光の描画線が折り返す場合に、折り返し点に
隣接する描画点Ｄ，Ｅ，Ｆに照射されるレーザ光のパワ
ー，照射時間を少なくするように制御するようにしたも
のである。(Second Embodiment) FIGS. 6 and 7 are views for explaining a method for controlling the laser irradiation energy of the recording / erasing apparatus according to the second embodiment. In addition, in each of the following embodiments, the same reference numerals are given to the portions having the same functions as those of the above-described first embodiment, and the overlapping drawings and the description will be appropriately omitted. In the second embodiment, the control unit 51
When the drawing line of the laser light is turned back, the power and the irradiation time of the laser light applied to the drawing points D, E and F adjacent to the turning point are controlled to be reduced.
【００３５】図６（ａ）に示すように、数字の「１」を
印字するような場合に、印字する軌跡は、→→→
となる。つまり、→の直線部分を印字する場合に
は、Ａ，Ｂ，Ｃ点は、条件Ｉで印字する。しかし、→
の折り返し点を印字する場合には、Ｄ点は条件II，Ｅ
点は条件III ，Ｆ点は条件IIで印字する［図７（ａ）参
照］。このため、折り返し点とその前後の描画点Ｄ，
Ｅ，Ｆは、熱の分布が２段階でなだらかに小さくなるの
で［図７（ｂ），（ｃ）］、描画線は、細くなったイメ
ージとなる［図７（ｄ）］。なお、→の直線部分を
印字する場合には、Ａ，Ｂ，Ｃ点と同様に条件Ｉで印字
する。As shown in FIG. 6A, when the numeral "1" is printed, the locus of printing is →→→
Becomes That is, when the straight line portion of → is printed, the points A, B, and C are printed under the condition I. However, →
When printing the turn-around point of, the point D is the condition II, E
Points are printed under condition III and points F are printed under condition II [see FIG. 7 (a)]. Therefore, the turning point and the drawing points D before and after it,
Since the heat distributions E and F are gradually reduced in two steps [FIGS. 7 (b) and 7 (c)], the drawing line becomes a thin image [FIG. 7 (d)]. When printing the straight line portion of →, printing is performed under the condition I in the same manner as the points A, B, and C.
【００３６】この結果、折り返し点では、描画線の隣接
する部分（Ｄ点，Ｅ点，Ｆ点）は、レーザのパワー又は
照射時間が短く照射されることになる。このとき、図６
（ｂ）に示すように、レーザ光のエネルギーは、領域Ｘ
のように細くなる。そして、時間の経過と共に、二点鎖
線で示す領域Ｙのように、熱の広がりを予想し、結果的
にきれいな文字となる。また、領域Ｚの部分は、熱の広
がりを考慮してあるので、熱ダメージを受けにくい。As a result, at the turning point, the portions adjacent to the drawing line (points D, E, F) are irradiated with laser power or irradiation time is short. At this time, FIG.
As shown in (b), the energy of the laser light is in the region X.
It becomes thin like. Then, with the lapse of time, the spread of heat is predicted as in the area Y indicated by the chain double-dashed line, resulting in beautiful characters. In addition, since the area Z is designed considering the spread of heat, it is less likely to be damaged by heat.
【００３７】（第３実施形態）図８，図９は、第３実施
形態による記録消去装置のレーザ照射エネルギーをコン
トロールする手法を説明する図である。第２実施形態で
は、制御部５１は、レーザ光の描画線が連続する場合
に、連続点Ａ，Ｂ，Ｃ，Ｄ，・・・を構成する所定間隔
ごとの描画点Ｂ，Ｄに照射されるレーザ光のパワー，照
射時間を少なくするように制御するようにしたものであ
る。(Third Embodiment) FIGS. 8 and 9 are views for explaining a method of controlling the laser irradiation energy of the recording / erasing apparatus according to the third embodiment. In the second embodiment, when the drawing line of the laser light is continuous, the control unit 51 irradiates the drawing points B and D at predetermined intervals that form the continuous points A, B, C, D, .... The power of the laser light and the irradiation time are controlled so as to be reduced.
【００３８】図８（ａ）に示すように、連続した横線を
印字するような場合に、印字する軌跡は、→とな
る。つまり、このとき、Ａ，Ｃ点は、条件Ｉで印字し、
Ｂ，Ｄ点は条件IIで印字する［図９（ａ）参照］。この
ため、連続線の１つおきの描画点Ｂ，Ｃは、スポット径
が小さくなり［図９（ｂ）］、熱の分布も小さくなるの
で［図９（ｃ）］、描画線は、太くなったり、細くなっ
たりするイメージとなる［図９（ｄ）］。しかし、実際
には、目視上に、二点鎖線で示すように、等幅の直線に
見える。As shown in FIG. 8A, when a continuous horizontal line is printed, the locus to be printed is →. That is, at this time, the points A and C are printed under the condition I,
Points B and D are printed under condition II [see FIG. 9 (a)]. Therefore, at every other drawing point B, C of the continuous line, the spot diameter becomes smaller [Fig. 9 (b)] and the heat distribution becomes smaller [Fig. 9 (c)], and the drawing line becomes thicker. It becomes an image of becoming thin or thin [Fig. 9 (d)]. However, in reality, as shown by a chain double-dashed line, it looks like a straight line of equal width.
【００３９】このように、第３実施形態によれば、連続
した直線の場合に、レーザのパワー又は照射時間を交互
に小さくするようにしたので、レーザ光のエネルギー
は、領域Ｘのように細くなる部分がある。そして、時間
の経過と共に、二点鎖線で示す領域Ｙのように、熱の広
がりを予想し、結果的にきれいな文字となる。また、領
域Ｚの部分は、熱の広がりを考慮してあるので、熱ダメ
ージを受けにくい。As described above, according to the third embodiment, in the case of a continuous straight line, the power of the laser or the irradiation time is alternately made small, so that the energy of the laser light is thin as in the region X. There is a part that becomes. Then, with the lapse of time, the spread of heat is predicted as in the area Y indicated by the chain double-dashed line, resulting in beautiful characters. In addition, since the area Z is designed considering the spread of heat, it is less likely to be damaged by heat.
【００４０】（変形形態）以上説明した実施形態に限定
されることなく、種々の変形や変更が可能であって、そ
れらも本発明の均等の範囲内である。
（１） 例えば、上記実施形態では、レーザ光のパワー
と照射時間を１段小さくする例で説明したが、パワーや
を照射時間を段階的変化させたり、両者を混在させたり
することも可能である。(Modifications) The present invention is not limited to the above-described embodiments, and various modifications and changes can be made, which are also within the scope of the present invention. (1) For example, in the above embodiment, an example in which the power of the laser light and the irradiation time are reduced by one step has been described, but it is also possible to change the irradiation time of the power and the power stepwise, or to mix both. is there.
【００４１】（２）レーザ光を出力する方式は、１点ご
とにオン・オフするパルス出力方式の例で説明したが、
光を連続的に出力するＣＷ方式であってもよい。ＣＷ方
式の場合であっても、レーザパワー、レーザ照射時間を
同様に制御することによって、熱ダメージを軽減するこ
とが可能である。このＣＷ方式によって、熱ダメージを
軽減させる制御をする場合には、光の走査の動作速度に
同期させて、制御すればよい。(2) The method of outputting the laser light has been described by taking the example of the pulse output method of turning on / off for each point.
A CW system that continuously outputs light may be used. Even in the case of the CW method, thermal damage can be reduced by controlling the laser power and the laser irradiation time in the same manner. When the control for reducing the thermal damage is performed by the CW method, the control may be performed in synchronization with the operation speed of light scanning.
【００４２】（３）上記実施形態では、一筆書きするベ
クタースキャン方式で描画する例で説明したが、レーザ
光を横方向に移動させ、ビットマップで描画するラスタ
スキャン方式や、レーザ光を縦方向に移動させ、ビット
マップで描画するカラムスキャン方式であっても、同様
な制御によって、印字品質を維持しつつ、熱ダメージを
軽減することが可能である。(3) In the above embodiment, an example of drawing by the one-stroke vector scan method has been described. However, the laser scan is moved in the horizontal direction to draw a bitmap, or the laser light is drawn in the vertical direction. Even in the case of the column scan method in which the print is moved to the position and the bit map is drawn, the thermal damage can be reduced while maintaining the print quality by the similar control.
【００４３】（４） 情報を記録する例で説明したが、
消去する場合にも、同様に適用できる。この場合には、
記録するエネルギーの約８０％の出力で消去可能であ
る。(4) Although the example of recording information has been described,
The same applies to the case of erasing. In this case,
It can be erased at an output of about 80% of the recorded energy.
【００４４】[0044]
【発明の効果】以上詳しく説明したように、本発明によ
れば、レーザ光の描画線に照射されるレーザ光のパワー
及び／又は照射時間を、その点ごとにコントロールする
ので、その描画線には、発色に足りる必要かつ十分なエ
ネルギーが与えられ、印字品質を確保しつつ、最低の熱
ダメージによって、印字することが可能となる。As described in detail above, according to the present invention, the power and / or the irradiation time of the laser beam applied to the drawing line of the laser beam is controlled for each point, so that the drawing line can be controlled. Is supplied with necessary and sufficient energy sufficient for color development, and it is possible to perform printing with the minimum heat damage while ensuring printing quality.
【図１】本発明による可逆性感熱記録媒体の記録消去装
置の第１実施形態を示すブロック図である。FIG. 1 is a block diagram showing a first embodiment of a recording / erasing apparatus for a reversible thermosensitive recording medium according to the present invention.
【図２】第１実施形態による記録消去装置のレーザ照射
エネルギーをコントロールする第１手法を説明する図で
ある。FIG. 2 is a diagram illustrating a first method for controlling laser irradiation energy of the recording / erasing apparatus according to the first embodiment.
【図３】第１実施形態による記録消去装置のレーザ照射
エネルギーをコントロールする第２の手法を説明する図
である。FIG. 3 is a diagram illustrating a second method for controlling laser irradiation energy of the recording / erasing apparatus according to the first embodiment.
【図４】第１実施形態による記録消去装置のレーザ照射
エネルギーをコントロールする第３の手法を説明する図
である。FIG. 4 is a diagram illustrating a third method of controlling laser irradiation energy of the recording / erasing apparatus according to the first embodiment.
【図５】第１実施形態による記録消去装置のレーザ照射
エネルギーをコントロールする第４の手法を説明する図
である。FIG. 5 is a diagram illustrating a fourth method for controlling laser irradiation energy of the recording / erasing apparatus according to the first embodiment.
【図６】第２実施形態による記録消去装置のレーザ照射
エネルギーをコントロールする手法を説明する図であ
る。FIG. 6 is a diagram illustrating a method of controlling laser irradiation energy of the recording / erasing apparatus according to the second embodiment.
【図７】第２実施形態による記録消去装置のレーザ照射
エネルギーをコントロールする手法を説明する図であ
る。FIG. 7 is a diagram illustrating a method of controlling laser irradiation energy of the recording / erasing apparatus according to the second embodiment.
【図８】第３実施形態による記録消去装置のレーザ照射
エネルギーをコントロールする手法を説明する図であ
る。FIG. 8 is a diagram illustrating a method of controlling laser irradiation energy of the recording / erasing apparatus according to the third embodiment.
【図９】第３実施形態による記録消去装置のレーザ照射
エネルギーをコントロールする手法を説明する図であ
る。FIG. 9 is a diagram illustrating a method of controlling laser irradiation energy of the recording / erasing apparatus according to the third embodiment.
【図１０】可逆性感熱記録媒体の一般的構成を説明する
図である。FIG. 10 is a diagram illustrating a general configuration of a reversible thermosensitive recording medium.
【図１１】可逆性感熱記録媒体の描画に関する課題を説
明する図である。FIG. 11 is a diagram illustrating a problem related to drawing on a reversible thermosensitive recording medium.
【図１２】可逆性感熱記録媒体の描画に関する課題を説
明する図である。FIG. 12 is a diagram illustrating a problem related to drawing on a reversible thermosensitive recording medium.
５０ 記録消去装置 １０ レーザ光照射装置 １１ ＬＤドライバ １２ 半導体レーザ １３ 光ファイバ １４ レンズヘッド ２０ 走査装置 ２２ スキャニングミラー ３０ 移動装置 ４０ 搬送装置 ５１ 制御部 ５２ 操作部 ５３ 表示部 ６０ リライトカード ６２ 可逆性感熱記録層 50 Record eraser 10 Laser light irradiation device 11 LD driver 12 Semiconductor laser 13 optical fiber 14 lens head 20 scanning device 22 scanning mirror 30 mobile devices 40 Conveyor 51 control unit 52 Operation part 53 display 60 rewrite cards 62 Reversible thermosensitive recording layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西川 昌洋 東京都新宿区市谷加賀町一丁目１番１号 大日本印刷株式会社内 (72)発明者 杉山 茂樹 埼玉県日高市下高萩新田17−２ シグマ光 機株式会社内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Masahiro Nishikawa 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd. (72) Inventor Shigeki Sugiyama 17-2 Shimotakahagi Nitta, Hidaka City, Saitama Prefecture Machine Co., Ltd.
Claims (4)
記録及び／又は消去が可能な可逆性感熱記録媒体に、前
記可視情報の記録及び／又は消去を行う可逆性感熱記録
媒体の記録消去装置において、 レーザ光照射部からレーザ光を照射するレーザ光照射手
段と、 前記レーザ光照射手段の照射制御を行う制御手段と、 を備え、 前記制御手段は、前記レーザ光の描画点に照射されるエ
ネルギーを、その描画点ごとに制御すること、を特徴と
する可逆性感熱記録媒体の記録消去装置。1. A recording and erasing apparatus for a reversible thermosensitive recording medium which records and / or erases visible information on a reversible thermosensitive recording medium capable of recording and / or erasing visible information by the action of thermal energy. A laser beam irradiating means for irradiating the laser beam from the laser beam irradiating section; and a control means for controlling the irradiation of the laser beam irradiating means, wherein the control means irradiates the drawing point of the laser beam with energy. Of the reversible thermosensitive recording medium.
記録消去装置において、 前記制御手段は、前記レーザ光の描画線が交差する場合
に、交差する描画点に照射されるレーザ光のパワー及び
／又は照射時間を少なくするように制御すること、を特
徴とする可逆性感熱記録媒体の記録消去装置。2. The recording / erasing apparatus for a reversible thermosensitive recording medium according to claim 1, wherein, when the drawing lines of the laser light intersect, the control unit controls the laser light irradiated to the intersecting drawing points. A recording / erasing apparatus for a reversible thermosensitive recording medium, characterized in that power and / or irradiation time is controlled so as to be reduced.
記録消去装置において、 前記制御手段は、前記レーザ光の描画線が折り返す場合
に、折り返し点に隣接する描画点に照射されるレーザ光
のパワー及び／又は照射時間を少なくするように制御す
ること、を特徴とする可逆性感熱記録媒体の記録消去装
置。3. The recording / erasing apparatus for a reversible thermosensitive recording medium according to claim 1, wherein the control unit irradiates a drawing point adjacent to a turning point when the drawing line of the laser beam is turned back. A recording / erasing apparatus for a reversible thermosensitive recording medium, characterized in that the power of light and / or the irradiation time are controlled so as to be reduced.
記録消去装置において、 前記制御手段は、前記レーザ光の描画線が連続する場合
に、連続点を構成する所定間隔ごとの描画点に照射され
るレーザ光のパワー及び／又は照射時間を少なくするよ
うに制御すること、を特徴とする可逆性感熱記録媒体の
記録消去装置。4. The recording / erasing apparatus for a reversible thermosensitive recording medium according to claim 1, wherein the control means, when the drawing lines of the laser beam are continuous, draw points at predetermined intervals forming continuous points. A recording / erasing apparatus for a reversible thermosensitive recording medium, characterized in that the power and / or the irradiation time of the laser light irradiated to the laser are controlled to be reduced.
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| JP2001326141A JP3990891B2 (en) | 2001-10-24 | 2001-10-24 | Reversible thermal recording medium recording / erasing device |
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