WO1999038698A1 - Imprimante optique - Google Patents
Imprimante optique Download PDFInfo
- Publication number
- WO1999038698A1 WO1999038698A1 PCT/JP1999/000395 JP9900395W WO9938698A1 WO 1999038698 A1 WO1999038698 A1 WO 1999038698A1 JP 9900395 W JP9900395 W JP 9900395W WO 9938698 A1 WO9938698 A1 WO 9938698A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- color
- exposure
- optical printer
- section
- Prior art date
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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
- B41J2/525—Arrangement for multi-colour printing, not covered by group B41J2/21, e.g. applicable to two or more kinds of printing or marking process
-
- 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
-
- 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
- B41J2/473—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 using multiple light beams, wavelengths or colours
Definitions
- the present invention relates to an optical printer device that forms an image by exposing at a predetermined timing while relatively moving on a photosensitive paper, and in particular, a technology for controlling the exposure timing of the optical printer device. About.
- Japanese Patent Application Laid-Open No. 2-169270 discloses an optical printer device for forming an image on a photosensitive paper while relatively moving an optical head on the photosensitive paper.
- the optical printer will be described below with reference to FIG.
- the photosensitive paper 60 is driven at a constant speed in the direction of arrow Z by the feed roller 70 with respect to the light head 10.
- the light head 10 is a white light source 20 that emits white light radially, a cylindrical lens 30 that condenses this white light linearly on photosensitive paper 60, and a three-color separation liquid crystal shutter. 40 and a liquid crystal shutter array 50.
- the three-color separation liquid crystal shutter 40 includes three shutters 40 r, 40 g, and 40 b linearly extending in the width direction (spreading direction) of the white light from the cylindrical lens 30. It consists of These three shutters 40r, 40g, and 40b are independently driven and controlled to transmit red (R), green (G), and blue (B) light, respectively. La filter is provided.
- the liquid crystal shutter array 50 has a plurality of pixels arranged in the same direction as the length direction of each of the shutters 40r, 40g, and 40b.
- the optical printer receives color image data with gradation, controls shutters 40r, 40g, and 40b based on the image data, and exposes photosensitive paper 60. To form an image.
- the direction perpendicular to the feed direction of the photosensitive paper 60 is the liquid crystal shutter.
- An image is formed by the stutter array 50.
- the photosensitive paper 60 is stationary, and the optical head 10 moves in the direction of arrow Z.
- the photosensitive paper 60 is divided into three layers, and the photosensitive paper 60 is exposed to the R light in order to indicate which color of light, R, G, or B, the photosensitive paper 60 has been exposed to.
- the first layer of the above three layers is indicated by hatching, and similarly for G light and B light, the second layer and third layer are hatched. This indicates that the light was exposed to the light.
- FIG. 17 does not explain that the actual photosensitive paper 60 is constituted by such three layers.
- Sections 1 to 6 represent pixels in the moving direction of the optical head (Z direction in Fig. 17).
- the pixel width is indicated by X in FIG.
- FIG. 17 shows a state in which the light head 10 has started emitting R light so as to expose the section 3 on the photosensitive paper 60. At this time, G light and B light are not emitted. Then, the light head 10 moves at a constant speed in the direction of the arrow Z (equal to the width of the pixel) for a distance X while emitting R light, and arrives at the position (b) in Fig. 17 At this time, the exposure in section (3) of the R light ends.
- Light head 10 comes to the position (b) in Fig. 17 Simultaneously with the end of the emission, the emission of the G light in section 3 starts as shown in (c) of Fig. 17 This section 3 has already been exposed with R light as described above. Then, the light head 10 moves at a constant speed in the direction of the arrow Z by the distance X while emitting the G light, and when it comes to the position (d) in FIG. finish.
- the optical head 10 comes to the position (d) in Fig. 17 and ends the emission of the G light, and at the same time, starts emitting the B light in the section 3 as shown in (e) of Fig. 17.
- This section 3 has already been exposed with R light and G light as described above. Then, the light head 10 moves at a constant speed in the direction of the arrow Z by the distance X while emitting the B light, and when the light head 10 comes to the position (f) in FIG. finish.
- An object of the present invention is to provide an optical printer capable of completely eliminating a non-exposed portion and printing a color image with high resolution and excellent image quality.
- an optical printer device includes a light head that emits a plurality of colored lights while moving relatively to a photoconductor, and the light head and the photoconductor.
- the respective images on the photoreceptor are configured to have a predetermined pitch with respect to the relative movement direction.
- An image is formed on the photoreceptor by being irradiated in a predetermined order in accordance with the relative movement of the gate.
- ADVANTAGE OF THE INVENTION According to this invention, even when it is not possible to form an image of color light on the photoconductor in the moving direction of the optical head in close contact with each other, the entire area of the photoconductor can be exposed. This has the effect of improving the resolution of the image. In addition, since an average gray level of each pixel is set between pixels, a beautiful image with good color mixing can be obtained.
- FIG. 1A is a perspective view showing a schematic configuration of an optical printer device according to the present invention.
- FIG. IB is a schematic diagram of the optical printer device of FIG.
- FIG. 2 is a diagram for explaining the principle of gradation control of the optical printer device according to the present invention.
- FIG. 3 is a diagram for explaining the exposure timing when the optical printer according to the first embodiment of the present invention exposes the photosensitive paper, and shows a first exposure cycle and a second exposure cycle. You.
- FIG. 4 is a continuation of FIG. 3 and shows a third exposure cycle and a fourth exposure cycle.
- FIG. 5 is a view for explaining the exposure timing when the optical printer device according to the second embodiment of the present invention exposes the photosensitive paper, and the first exposure cycle and the second exposure cycle are described. Shown.
- Figure 6 is a continuation of Figure 5, with the third and fourth exposure cycles Indicates a cycle.
- FIG. 7 is a view for explaining the exposure timing when the optical printer device according to the third embodiment of the present invention exposes the photosensitive paper, and includes a first exposure cycle and a second exposure cycle. Is shown.
- FIG. 8 is a continuation of FIG. 7 and shows a third exposure cycle and a fourth exposure cycle.
- FIG. 9 is a continuation of FIG. 8 and shows a fifth exposure cycle.
- FIG. 10 is a view for explaining exposure timing when an optical printer device according to a fourth embodiment of the present invention exposes photosensitive paper.
- FIG. 11 is a view for explaining the exposure timing when the optical printer device according to the fifth embodiment of the present invention exposes the photosensitive paper. The first exposure cycle and the second exposure cycle are described. Show.
- FIG. 12 is a continuation of FIG. 11 and shows a third exposure cycle and a fourth exposure cycle.
- FIG. 13 is a diagram for explaining the exposure timing when the optical printer device according to the sixth embodiment of the present invention exposes the photosensitive paper, and shows a first exposure cycle and a second exposure cycle.
- FIG. 14 is a continuation of FIG. 13 and shows a third exposure cycle and a fourth exposure cycle.
- Figure 15 is a continuation of Figure 13 and shows the fifth exposure cycle. Is shown.
- FIG. 16 is a schematic cross-sectional view of a conventional optical printer device.
- FIG. 17 is a diagram illustrating exposure timing when a conventional optical printer device exposes photosensitive paper.
- the optical head 100 includes an LED array 110, and an optical system including a parabolic mirror 120, a cylindrical lens 130, and a reflecting mirror 140. Is provided.
- the light head 100 is driven in the direction of arrow Z1 with respect to the photosensitive paper 500 by a head feeding means 300 (described later).
- the ED array 110 has two rows of LED elements that emit red (R), green (G), and blue (B) light-sensitive paper in the order of R, G, and B, respectively.
- the 0 photosensitive surfaces 500 a are arranged in order from the top in a direction perpendicular to the surface.
- the light emitted from the ED array 110 passes through the lower half of the cylindrical lens 130, is reflected by the parabolic mirror 120, and becomes parallel light.
- the parallel light reflected by the parabolic mirror 120 passes through the upper half of the cylindrical lens 130, is reflected by the reflecting mirror 140, and is exposed to the photosensitive surface 500 of the photosensitive paper 500.
- the light travels in the vertical direction with respect to 0a, passes through the liquid crystal shutter 150, and condenses on the photosensitive surface 500a. That is, the focal point of the light passing through the upper half of the cylindrical lens 130 is focused on the photosensitive surface of the photosensitive paper 500. 5 0 0a.
- the liquid crystal shutter 150 has 64 scanning electrodes in the width direction of the photosensitive paper 500 (in the direction indicated by the arrow Z2 in FIG. 1A) by using one scanning electrode and 64 signal electrodes. Are formed.
- the head feeding means 300 is composed of an endless optical head scanning wire 373, burries 371 and 372 around which the scanning wire 373 is wound, and a pulley 371. And 311 which rotationally drive.
- One portion of the scanning wire 373 is fixed to a wire fixing portion 111 provided on the side surface of the optical head 100 so as to protrude.
- the rotary shaft of the DC motor 310 is provided with a fin 321 of a rotary encoder 320. Many openings 3222 are formed in the fins 321.
- the light-emitting element and the light-receiving element (not shown) in the photointerrupter 32 are opposed to each other with the fin 32 1 interposed therebetween.
- the rotary encoder 3200 is constituted by the fin 3221 and the photointerrupter 323.
- the fin 3 2 1 rotates at the same time as the DC motor 3 10 rotates. Due to the rotation of the fins 321, the openings 322 interrupt the light between the light emitting element and the light receiving element of the photointerrupter 323. An electric signal is output in synchronization with the intermittent light, and the rotation angle position of the DC motor 310 is detected.
- the rotation of the DC motor 310 is controlled by the ⁇ Ohm gear 350 and the gears 361, 3652, and 363. It is decelerated and converted into a linear reciprocating motion by the pulleys 37 1 and 37 2 and the scanning wire 37 3.
- the reciprocating movement of the scanning wire 373 causes the optical head 100 to move in the scanning direction via the wire fixing portion 111.
- a pair of position sensors 210 and 220 composed of a photointerrupter are fixed.
- the light shielding plate 240 fixed to the optical head 100 moves in the scanning direction together with the optical head 100, one or both of the position sensors 210 and 220 are provided. By shielding the light, the position of the optical head 100 is detected.
- reference numeral 375 denotes a base of the optical printer device, and the base 375 includes photosensitive paper 500, a developing roller 376, a control circuit 377, and the like. Is stored. Next, a method of forming an image on the photosensitive paper 500 will be described.
- the LED array 110 emits light in the order of R, G, and B from the top.
- the light from the LED array 110 spreads in the left-right direction (the direction indicated by the arrow Z2 in FIG. 1A), passes through the lower half of the cylindrical lens 130, and is parabolic. Up to 120 mirrors.
- the light that is reflected by the parabolic mirror 120 and spreads in the left-right direction is converted into parallel rays and passes through the upper half of the cylindrical lens 130.
- the upper half of this cylindrical lens 130 condenses the light reflected by the parabolic mirror 120 and forms an image on the surface of the photosensitive paper 500 to a predetermined width. Play a role.
- the light condensed by the upper half of the cylindrical lens 130 is changed its path by approximately 90 degrees by the flat mirror 140, and is reflected on the surface of the photosensitive paper 500. On the other hand, the light travels vertically. Then, the photosensitive paper 500 is exposed through the liquid crystal shutter 150.
- the light imaged on the photosensitive paper 500 with a predetermined width becomes R, G, and B in order from the front to the back in the scanning direction (Z1 direction). I have.
- the light shielding plate 1 1 1 1 1 Blocks both 10 and 220 light. Then, it is determined that the optical head 100 is the writing start position, and the harm is started.
- the R light passes through a first time controlled by the liquid crystal shutter 150, and exposes a predetermined area of the photosensitive paper 500.
- the G light then passes for a second time controlled by the liquid crystal shutter 150 to expose that area.
- the B light passes therethrough for a third time controlled by the liquid crystal shutter 150 to expose the same area. In this way, a full-color image is formed in the above area.
- FIG. 2 shows the relationship between the exposure distance on the photosensitive surface 500a of the photosensitive paper 500 and the exposure time.
- the light head is moved in the Z direction by a distance D.
- the liquid crystal shutter 150 is closed when the image A 2 having the width W is formed on the photosensitive paper surface at 500 a.
- the relationship between the exposure time and the position represented by the exposure distance on the photosensitive surface 500a of the photosensitive paper 500 becomes a trapezoid B having a height t1.
- the section E of the photosensitive surface 500a corresponding to the top side of the trapezoid B is an area where exposure is continued for a time t1 from the start of exposure of R light to the end of exposure.
- the exposure time t1 is the value obtained by dividing the moving distance D by the moving speed (constant value) of the light head.
- the exposure time is proportional to the moving distance D.
- the maximum exposure time that is, the maximum gradation is obtained.
- the moving distance D for providing the maximum gradation is referred to as “maximum exposure distance”.
- the exposure time changes linearly from 0 to t 1 or from t 1 to 0.
- the gradation on the photosensitive paper changes according to the exposure distance.
- the R light emitted from the LCD shutter 150 forms an image A 1 having a width W on the light-sensitive paper surface 500 a, and then the light head travels a distance d ( ⁇ D).
- the image A 3 having the width W is formed on 500 a of the photosensitive paper, the liquid crystal shutter 150 is closed.
- the relationship of the exposure time to the position represented by the exposure distance on the photosensitive surface 500a of the photosensitive paper 500 is a trapezoid C with a height t2 ( ⁇ t1) as shown in Fig. 2. .
- a gradation corresponding to the exposure time t2 is given.
- the exposure time t2 that is, the gradation can be changed by changing the exposure distance d.
- the light head moves in the direction of arrow Z at a constant speed with respect to the photosensitive paper 500.
- the R, G, and B lights emitted from the light head are indicated by two solid arrows pointing toward the photosensitive paper 500. Dotted arrows indicate the positions of each light after moving by the maximum exposure distance D.
- the hatching between the two solid arrows R, G, or B indicates that the R, G, or B light is at the position where radiation starts. This means that On the other hand, the hatching between the two dotted arrows of R, G, or B indicates the position where the light of R, G, or B ends emission after moving the maximum exposure distance D from the emission start position. It represents that there is. Therefore, the region where the hatching between the two solid arrows R, G or B overlaps with the hatching between the two dotted arrows corresponds to the region E shown in FIG. The exposure time is t1, and the maximum gradation is given.
- the photosensitive paper 500 in order to indicate which color of the R, G, or B light was exposed to the photosensitive paper 500, as described in the description of the conventional example in FIG. 0 is divided into three layers, the first layer from the top when exposed with R light, the second layer when exposed with G light, and the top layer when exposed with B light.
- the third layer is represented by hatching.
- Each section 1 to 8 indicates each pixel in the scanning direction of the light head.
- Each of the R, G, and B lights forms an image having a width W on the photosensitive paper 500 as shown in (a) of FIG.
- These images are arranged at regular intervals in the scanning direction of the optical head (the Z direction shown in (a) of Fig. 3).
- the pitch of the image arrangement (image pitch) is indicated by P in Fig. 3 (a).
- the image width W is twice the maximum exposure distance D.
- each of R, G, and B light emission shown in (a) to (c) of FIG. 3 forms one exposure cycle.
- the image is formed on the surface of the photosensitive paper by exposing the photosensitive paper by repeating this exposure cycle many times.
- each light continues to emit light (ie, the maximum exposure time is given and the maximum gradation is given to each section) while moving the maximum exposure distance D.
- each light is controlled in gradation, so the maximum exposure time is not always given.
- the liquid crystal shutter 150 is closed halfway without emitting light in all sections of the maximum exposure distance D, so that the emission distance ( Emission time) is adjusted. That is, the exposure distance (exposure time) is adjusted.
- each light exposes a different section of the photosensitive paper 500 in one exposure cycle. That is, in the first exposure cycle, the R light exposes the section 4, the G light exposes the section 3, and the B light exposes the section ⁇ ⁇ ⁇ ⁇ . Therefore, in the first exposure cycle, the image data controls the radiating distance in section (1), the radiating distance in section (3) (next to), and the radiating distance in section (4). Is configured.
- R light is B light emission (See (c) in Fig. 3) At the same time, emission starts at the position indicated by the solid arrow, and then, while radiating section 5, moves to the position indicated by the dotted arrow, that is, the maximum exposure distance D. To terminate the emission.
- the section 6 is exposed by all of R, G, and B.
- the section exposed by all of R, G, and B increases by one in the scanning direction of the light head (Z direction). In this way, the entire surface of the photosensitive paper is exposed to the three primary colors of light having gradations to form a full-color image.
- a second embodiment will be described with reference to FIGS.
- the difference from the first embodiment shown in FIGS. 3 and 4 is that the width W of the image of the R, G, and B color lights on the photosensitive paper 500 is three times the maximum exposure distance D. (Twice in the first embodiment).
- the width exposed by the two light beams can be adjusted by changing the image width W.
- the G light exposes 1Z3 in section 3 and the next section (opposite to (1)) 1G3 with G light. It can also be done. As described above, by overlapping the exposure sections, color mixing between pixels can be improved and a high-quality image can be formed.
- section 6 and the subsequent sections are successively exposed to R, G, B light, so that there is no unexposed area between the pixels of the photosensitive paper. A full-color image can be obtained.
- FIG. 7 A third embodiment will be described with reference to FIGS. 7, 8, and 9.
- section ⁇ ⁇ ⁇ with B light At the end of this exposure, section 6 has been exposed with all the R, G, and B lights.
- the section 7 and the subsequent sections are exposed one after another with the light of R, G, B, so that the area not exposed between the pixels of the photosensitive paper is It is possible to obtain a full-color image without images.
- FIGS. 11 and 12 [Fifth embodiment: FIGS. 11 and 12]
- the number of colors is set to 4 (R, G, B1, and B2) instead of 3 (R, G, B).
- B is divided into B1 and B2 because the B light is weak due to the characteristics of the LED.
- section 5 and the subsequent sections are successively exposed with four color lights, so that a full-color image with no unexposed areas between the pixels of the photosensitive paper Can be obtained.
- FIG. 13 The sixth embodiment will be described with reference to FIGS. 13, 14, and 15.
- FIG. The sixth embodiment is different from the previous embodiments in that the light emission order of the LED is performed from the side opposite to the moving direction Z of the light head.
- the three color lights of R, G, and B are arranged in this order from the moving direction Z side of the light head.
- section 6 and the subsequent sections are exposed one after another with R, G, B light.
- R, G, B light By being illuminated, a full-color image having no unexposed areas between the pixels of the photosensitive paper can be obtained.
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99901919A EP0985539B1 (en) | 1998-01-30 | 1999-01-29 | Optical printer |
US09/402,030 US6445403B1 (en) | 1998-01-30 | 1999-01-29 | Optical printer |
JP53917899A JP4249270B2 (ja) | 1998-01-30 | 1999-01-29 | 光プリンタ装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10/18917 | 1998-01-30 | ||
JP1891798 | 1998-01-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999038698A1 true WO1999038698A1 (fr) | 1999-08-05 |
Family
ID=11984974
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/000395 WO1999038698A1 (fr) | 1998-01-30 | 1999-01-29 | Imprimante optique |
Country Status (4)
Country | Link |
---|---|
US (1) | US6445403B1 (ja) |
EP (1) | EP0985539B1 (ja) |
JP (1) | JP4249270B2 (ja) |
WO (1) | WO1999038698A1 (ja) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63123021A (ja) * | 1986-11-13 | 1988-05-26 | Fuji Photo Film Co Ltd | 光シヤツタデバイス |
JPH0280271A (ja) * | 1988-09-17 | 1990-03-20 | Nec Home Electron Ltd | カラープリンタ |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2792874B2 (ja) | 1988-12-22 | 1998-09-03 | シャープ株式会社 | 液晶カラープリンタ |
JP2837683B2 (ja) * | 1989-04-17 | 1998-12-16 | 富士写真フイルム株式会社 | 画像記録装置の画素ライン間隔補正方法 |
JPH02287527A (ja) | 1989-04-28 | 1990-11-27 | Fuji Photo Film Co Ltd | ビデオプリンタ |
JPH0789128A (ja) | 1993-07-30 | 1995-04-04 | Kyocera Corp | Ledプリンタにおける高密度画像形成方法 |
JP4071293B2 (ja) * | 1997-02-12 | 2008-04-02 | シチズンホールディングス株式会社 | 光プリンタ装置 |
EP0941861B1 (en) * | 1997-02-12 | 2008-03-26 | Citizen Holdings Co., Ltd. | Optical printer |
-
1999
- 1999-01-29 EP EP99901919A patent/EP0985539B1/en not_active Expired - Lifetime
- 1999-01-29 JP JP53917899A patent/JP4249270B2/ja not_active Expired - Lifetime
- 1999-01-29 US US09/402,030 patent/US6445403B1/en not_active Expired - Lifetime
- 1999-01-29 WO PCT/JP1999/000395 patent/WO1999038698A1/ja active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63123021A (ja) * | 1986-11-13 | 1988-05-26 | Fuji Photo Film Co Ltd | 光シヤツタデバイス |
JPH0280271A (ja) * | 1988-09-17 | 1990-03-20 | Nec Home Electron Ltd | カラープリンタ |
Also Published As
Publication number | Publication date |
---|---|
EP0985539A4 (en) | 2001-05-16 |
EP0985539A1 (en) | 2000-03-15 |
JP4249270B2 (ja) | 2009-04-02 |
US6445403B1 (en) | 2002-09-03 |
EP0985539B1 (en) | 2007-01-03 |
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