JPH11198441A - Color image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a color image forming apparatus in which a high quality image can be obtained quickly without causing any color shift. SOLUTION: A light source means 1 comprising n light emitting parts 1B, 1G ans 1R arranged linearly in n rows emits a plurality of luminous flux N1,..., Nn modulated by n color signals based on image information sequentially. A one line conversion means 3 substantially aligns the optical axis of the plurality of luminous flux which are then focused in the order of N1,..., Nn by a focus means substantially in one line on the face of a recording medium 4 being carried in the subscanning direction by a carrying means 8 thus forming images in the order of line. In such a color image forming apparatus, the order N1,..., Nn superposes the pixels while shifting the phase by 1/n pixel at a time in the subscanning direction at the time of focusing the luminous flux substantially in one line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color image forming apparatus (one-line color apparatus), and more particularly to a color image forming apparatus which performs color processing in a line-sequential manner and is suitable for a color apparatus such as an image scanner or a printer. is there.

[0002]

2. Description of the Related Art Conventionally, the optical axis of each light beam (color light) emitted from an n-color light emitting element (light emitting portion) arranged at a different position in the sub-scanning direction is made to coincide with each other via a one-dimensional diffraction grating to make the original surface A color image forming apparatus for illuminating an original, which illuminates a document and generates a color image signal, is disclosed in
It is proposed in Japanese Patent Publication No. 284252.

Further, a light beam based on color image information of a document is color-separated into three color lights of R, G, and B via a one-dimensional blazed diffraction grating as color separation means, and the color image information of the document is read. Such a partial color image reading apparatus has been proposed in, for example, Japanese Patent Application Laid-Open No. 2-233057.

In Japanese Patent Application Laid-Open No. 2-233057, the color image information of an original is converted into R, G, B images through a laminated dichroic filter (beam splitter for color separation) as color separation means.
A color image reading apparatus that reads out color image information of the original by color separation into three color lights has been disclosed as a conventional example.

On the other hand, a plurality of light-emitting elements (light-emitting portions) separately arranged in the sub-scanning direction are processed in a line-sequential manner in a serial manner for each color instead of in parallel, thereby unifying the electric processing system. Various color image forming apparatuses (for example, color scanners) having a low speed but a simple configuration have also been proposed.

[0006]

The color separation means such as a one-dimensional blazed diffraction grating or a laminated dichroic filter used in the above-mentioned JP-A-6-284252, JP-A-2-23357, etc. When applied to a color image forming apparatus that performs line-sequential processing serially for each color, the following problems occur.

FIGS. 11 to 18 are explanatory diagrams for explaining the above problems.

FIG. 11 is a schematic diagram of a main part of a color image writing apparatus as a color image forming apparatus for performing line-sequential processing for each color light serially.

In FIG. 1, a plurality of one-dimensional light emitting element arrays (for example, LED arrays) 41R, 41G and 41B are arranged in three rows in the sub-scanning direction. , And B emit (emit) a plurality of light beams (color light) modulated by the respective color signals.

A plurality of light beams (light information) modulated by the R, G, and B color signals separated in the sub-scanning direction have their optical axes almost completely matched by a transmission type one-dimensional diffraction grating 43. An image is formed in one line on the surface to be scanned (image forming surface) via the image forming element 42 composed of a rod lens array.
A photosensitive film 44 that develops a color in response to light on the surface to be scanned
Are scanned in the sub-scanning direction.

FIG. 12 is an explanatory diagram showing image information of a black thin line original 45 for writing. In the drawing, reference numeral 47 denotes a one-line pixel column in which the pixel size subjected to the one-line color processing is displayed only for comparison of scales.

FIG. 13 is an enlarged explanatory view showing the inside of a region A shown on the surface of the photosensitive film 44 in FIG. 11 in an enlarged manner. In the figure, L of each color separated in the sub-scanning direction is shown.
The figure shows that each color light (each line information) modulated by each color signal emitted from the ED array is completely converted into one line. The lengths of the arrows R, G, and B shown in the figure correspond to the sizes of the respective write pixels.

FIG. 14 to FIG. 16 are explanatory diagrams showing a state in which they are written serially and line-sequentially.

First, the line information of the B signal is written in FIG. 14, and then the line information of the G signal is written in FIG. 15. At this time, the surface of the photosensitive film 44 is 1/3 in the sub-scanning direction. Since the pixel has moved, the write information of the G signal is shifted. Further, in FIG. 16, when the R signal, which is the last line information, is written, there occurs a phenomenon that the writing position is shifted from the G signal by 1/3 pixel and the B signal by 2/3 pixel.

While the image is processed line-sequentially, the surface of the photosensitive film 44 moves in the sub-scanning direction, and the actually processed image is moved in the sub-scanning direction as shown in FIG. There is a problem in that an image having color misregistration occurs, and the quality of image quality is significantly reduced.

Although the writing process of the color image information has been described above, the result is the same even when the reading process is performed. For example, the photosensitive film surface 44 is replaced with a read original corresponding to FIG.
R, 41G, and 41B may be replaced with light receiving elements (eg, line sensors).

A first object of the present invention is to convert a plurality of luminous fluxes modulated by respective color signals emitted line-sequentially from a light source means in accordance with image information into substantially one line on a recording medium surface via a one-line conversion means. When forming an image, instead of completely forming one line as in the related art, the order N in which line sequential processing is performed is performed.
.. Nn are shifted in phase by 1 / n pixel in the sub-scanning direction and superimposed to provide a high-quality color image without color shift.

A second object of the present invention is to color-separate a light flux based on a reading medium illuminated by an illuminating means into a plurality of color lights via a one-line converting means and form an image on the image reading means surface into a substantially one line. In this case, by forming the plurality of color lights on the image reading means surface with a phase shift of 1 / n pixel in the sub-scanning direction to form an image, it is possible to obtain a high quality color image without color shift. An image forming apparatus is provided.

[0019]

According to the present invention, there is provided a color image forming apparatus comprising: (1) a light source unit in which n light emitting units are linearly arranged in n columns; n color signals based on image information; Nn are sequentially emitted in the order of N1,... Nn,
The optical axes of the plurality of light beams are made substantially coincident by the one-line conversion means, and an image is formed on the surface of the recording medium conveyed in the sub-scanning direction by the conveyance means via the imaging means in the order of N1,. A color image forming apparatus for forming an image in a line-sequential manner, and when forming an image in substantially one line, the order N1,... Nn of the line-sequential processing is shifted by 1 / n pixel in the sub-scanning direction. It is characterized by overlapping.

In particular, (1-1) means for shifting the phase by 1 / n pixel using setting data of the one-line conversion means, and (1-2) the means for shifting the n color signals Are three color signals of R, G and B, and (1-3) n
(1-4) The n light-emitting units are composed of R, G, and B LED arrays, and the one-line conversion means is composed of a one-dimensional diffraction grating. (1-5) the parameter n is 3, (1-5) that the one-line conversion means comprises a color synthesizing element formed by laminating a plurality of dichroic mirrors, 6) The imaging means sets the light source means and the recording medium in an optically substantially conjugate relationship, or (1-
7) The recording medium and a head composed of elements other than the recording medium are characterized in that at least one of them is movable in the sub-scanning direction.

(2) A light source unit having n light emitting units arranged linearly in n columns, and a plurality of light sources and modulators which are modulated and opened and closed by the n color signals based on image information from light source means having a white light source. .. Nn are emitted in a line-sequential order in the order of N1,... Nn, the optical axes of the plurality of light beams are made substantially coincident by the one-line conversion means, and the recording medium is conveyed in the sub-scanning direction by the conveyance means via the imaging means. This is a color image forming apparatus for forming an image in a line-sequential manner by forming an image on the surface in substantially one line in the order of N1,... Nn. ,..., Nn are superposed with a phase shift of 1 / n pixel in the sub-scanning direction.

In particular, (2-1) means for shifting the phase by 1 / n pixel by using setting data of the one-line conversion means, and (2-2) the means for shifting the n color signals Means that there are three signals of R, G and B, and (2-3) the n light-emitting units are formed of a liquid crystal shutter array having filters of R, G and B colors, and the one-line conversion means Is composed of a one-dimensional diffraction grating, (2-4) the parameter n is 3, (2-5) the imaging means optically substantially conjugates the light source means with the recording medium. Or (2-6) that the recording medium and a head made of each element other than the recording medium are such that at least one of them is movable in the sub-scanning direction, (2-7) ) Provided with a detecting means for detecting the light amount of the spot image formed on the recording medium surface, That.

(2-8) Writing an image on an unexposed film using a light emitting element capable of intensity modulation in accordance with the color signal, and scanning an exposed transparent original on the same surface to be scanned, An image is read by converting the transmitted light amount into a signal.

(3) The reading medium on the document table conveyed in the sub-scanning direction by the conveying means is illuminated by the illuminating means, and the luminous flux from the reading medium is transmitted by the image forming means via the one-line converting means into n pieces of light. A color image forming apparatus that separates color image information into color light color image information, forms a substantially one-line image on an image reading means surface, and reads the n color light color image information line-sequentially by the image reading means. When forming an image on substantially one line, the color image information of the n pieces of color light is formed by shifting the phase by 1 / n pixel in the sub-scanning direction on the image reading means surface. .

In particular, (3-1) means for shifting the phase by 1 / n pixel by using setting data of the one-line conversion means, and (3-2) means for shifting the n color signals Means that there are three color signals of R, G and B; (3-3) that the one-line conversion means comprises a one-dimensional diffraction grating;
-4) the parameter n is 3, (3-5) the imaging means sets the reading medium and the image reading means in an optically substantially conjugate relationship, 6) The read medium and a head made of each element other than the read medium are such that at least one of them is movable in the sub-scanning direction, and (3-7) the image reading means is a monolithic three-line sensor. And the like.

(4) A plurality of light-receiving elements in which a plurality of light-emitting elements for emitting a light beam light-modulated based on image information are arranged in a one-dimensional direction, and the light-emitting elements N1,... Are arranged in a line, and the optical axes of the luminous fluxes from the respective light-emitting portions of the color signal processing means for processing the n color signals line-sequentially are made substantially coincident by the one-line conversion means, and are conveyed by the conveyance means via the imaging means. A color image forming apparatus which forms an image on a recording medium surface conveyed in the sub-scanning direction substantially in one line in the order of N1,... Nn and forms an image in a line-sequential manner. .. Nn in which line-sequential processing is performed are superimposed with the phase shifted by 1 / n pixel in the sub-scanning direction.

(5) N light valve arrays in which a plurality of light valves that emit light beams modulated based on image information are arranged in a one-dimensional direction, and the light valve arrays N1,... Are arranged in a line, and the n
A recording medium which is conveyed in the sub-scanning direction by a conveying means via an image forming means, wherein the optical axes of the light beams from the respective light valve arrays of the color signal processing means for processing the individual color signals are substantially matched by a one-line converting means; Nn are formed on a surface in the order of N1,... Nn in substantially one line, and form a line-sequential image. When the image is formed in substantially one line, the line-sequential processing order N1,. Nn are superimposed with the phase shifted by 1 / n pixel in the sub-scanning direction.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 is a schematic view of a main part of a first embodiment when the present invention is applied to a color image writing apparatus, and FIGS. FIG.

In FIG. 1, reference numeral 1 denotes light source means (color signal processing means), and R (red) and G as light emitting portions (light emitting elements).
(Green), B (blue) one-dimensional LED array 1R, 1
G and 1B are linearly arranged in three rows in the sub-scanning direction.
A plurality of luminous fluxes (color lights) modulated by R, G, and B color signals based on color image information of the original by the driver 6 are emitted (emitted) line-sequentially in the order of N1,.

In this specification, the parameter n is 3
It is.

Reference numeral 3 denotes a transmission type one-dimensional diffraction grating (for example, a one-dimensional blazed diffraction grating) as one-line conversion means, which is modulated by each color signal emitted from the light source means 1 in the order of N1,. The optical axes of the plurality of light beams are made substantially coincident.

Reference numeral 2 denotes a rod lens array as an image forming means, which forms a plurality of light beams modulated by R, G, and B color signals into substantially one line on a photosensitive film surface as a recording medium described later. ing. The imaging means 2 sets the light source means 1 and the recording medium 4 in an optically substantially conjugate relationship.

Here, to form an image substantially in one line means that the order N1,... Nn of line sequential processing is 1 / n in the sub-scanning direction.
This is to superimpose pixels by shifting their phases.

In this embodiment, the means for shifting this 1 / n pixel is, for example, the setting data of the one-dimensional diffraction grating 3 as one-line conversion means.

Reference numeral 4 denotes a photosensitive film (scanning surface) as a recording medium. The surface of the photosensitive film 4 of this embodiment develops a color in response to light, and is conveyed in the sub-scanning direction by a conveying roller 8 as conveying means as indicated by an arrow in the figure.

In the present embodiment, R, R,
A plurality of luminous fluxes (color light) modulated by the G and B color signals
Are emitted (emitted) line-sequentially in the order of N1,... Nn.

The plurality of light beams modulated by the R, G, and B color signals separated in the sub-scanning direction have their optical axes substantially matched by the one-dimensional diffraction grating 3 so that the rod lens array 2 is moved. N1,... On the photosensitive film surface 4 through
An image is formed on substantially one line in the order of Nn, and line information (color image information) is written line by line.

Next, the writing of this line information will be described with reference to FIG.
This will be described with reference to FIGS.

FIG. 2 is an explanatory diagram showing image information of a black thin line original 5 for writing. In the figure, reference numeral 7 denotes a one-line pixel column in which the pixel size subjected to the one-line color processing is displayed only for comparison of scales. still,
Lines shifted by 1 / n pixel phase are not shown.

FIG. 3 is an enlarged explanatory view showing the inside of a region A shown on the surface of the photosensitive film 4 in FIG. 1 in an enlarged manner. As shown in the figure, the respective color lights (each line information) modulated by the respective color signals emitted from the R, G, and B color LED arrays separated in the sub-scanning direction are completely in-line unlike the related art. Instead of being converted, each color light is superimposed with the phase shifted. The lengths of the arrows R, G, and B shown in the figure correspond to the sizes of the respective write pixels. In the present embodiment, R, G of n = 3 columns are used.
1 / n = 1/3 in the sub-scanning direction for each of the G and B color signals
It is shifted by pixels.

FIGS. 4 to 6 show that the phase is 1 in the sub-scanning direction.
FIG. 9 is an explanatory diagram showing, in chronological order, how each color light modulated by each of R, G, and B color signals shifted by / n pixels is serially line-sequentially written;

First, after the line information of the B signal is written in FIG. 4, the writing of the G signal is performed at a position shifted by ず れ pixel in FIG. 5.
Since the surface is moved by 1/3 pixel in the sub-scanning direction, no deviation occurs in the written information. Further, in FIG. 6, the R signal, which is the last line information, is also performed at a position shifted by 1/3 pixel. At this time, however, the writing information is shifted because the surface of the photosensitive film 4 is further moved by 1/3 pixel. Does not occur.

As described above, in this embodiment, the movement of the surface of the photosensitive film 4 in the sub-scanning direction during the processing of the image in the line-sequential manner as described above is shifted in the direction to cancel in advance, so that the color image shown in FIG. When writing according to image information is performed, a faithful and high-quality image reproduction without color shift can be performed as shown in FIG.

Although the above description has been given of the processing of writing color image information, the result is the same even when the reading processing is performed. That is, the photosensitive film (recording medium) 4 is
And the light emitting element (L
The ED array 1R, 1G, 1B may be replaced with a light receiving element (for example, a line sensor).

In the present embodiment, a transmission type one-dimensional diffraction grating is used as the one-line conversion means. However, the present invention can be applied similarly to the first embodiment even when a reflection type one-dimensional diffraction grating is used. be able to.

(Second Embodiment) FIG. 8 is a schematic view of a main part of a second embodiment when the present invention is applied to a color image writing apparatus. In the figure, the same elements as those shown in FIG. 1 are denoted by the same reference numerals.

The present embodiment is different from the first embodiment in that the light source means includes a plurality (n) of liquid crystal shutter arrays (light valve arrays) having R, G, and B filters, and a white light source. And detecting means for detecting output information of a spot image formed on the photosensitive film surface. Other configurations and optical functions are substantially the same as those of the first embodiment, and thus the same effects are obtained.

That is, in the figure, reference numeral 101 denotes a light source means, and a liquid crystal shutter array 11R having R, G, and B filters as light emitting units (liquid crystal elements) in which a plurality of light valves are arranged in a one-dimensional direction. , 11G, and 11B are linearly arranged in three rows in the sub-scanning direction, and a white light source 9.

Numeral 10 denotes a detecting means, which comprises, for example, a line sensor (CCD), receives output information (light quantity) of a spot image formed on the surface of the photosensitive film 4, and receives an analog signal from the received line sensor 10. The signal is converted into a digital signal through an AD converter (not shown), and the light amount of the spot image is detected.

In this embodiment, the liquid crystal shutters 1B, 1G, and 1R are shuttered in a matrix in a line-sequential manner by the driver 6, and a plurality of luminous fluxes from the light source means 101 modulated and opened by the R, G, and B color signals. To N
.. Nn in a line-sequential order in the order of
.. Nn are formed on the surface of the photosensitive film 4 as a recording medium in the order of N1,... Nn through the rod lens array 2 in a line-sequential manner. Color image information).

In this embodiment, the output information when the spot image formed on the surface of the photosensitive film 4 passes is received by the line sensor 10, and the received line information
Is converted into a digital signal through an AD converter to detect the amount of light of the spot image, so that writing of color image information can be performed with an appropriate amount of light.
Although not shown, a light guide path may be provided before reaching the line sensor 10 to increase efficiency.

Incidentally, the light amount transmitted through the liquid crystal element is partially subjected to light amount modulation, thereby making it possible to provide the light emitting device disclosed in
The present invention can be applied to a film scanner having a dodging function as disclosed in Japanese Patent Application Laid-Open No. 8-279898.

JP-A-8-279898 discloses a photoelectric conversion means for reading a subject image and converting it into an electric signal, an A / D conversion means for converting the electric signal converted by the light source conversion means into a digital signal, Extracting means for extracting a predetermined area of the subject image read by the converting means, and changing a signal level of the area input to the A / D converting means according to the density of the area extracted by the extracting means. Using the signal level changing means, the tone of the color of the image is accurately reproduced, and high-quality image reading is performed.

Further, by performing light quantity modulation according to the image signal and scanning the unexposed film arranged on the photosensitive film surface in the sub-scanning direction, a head which can be configured as a film recorder or a film scanner is achieved. can do.

(Third Embodiment) FIG. 9 is a schematic view of a main part of a third embodiment in which the present invention is applied to a color image reading apparatus. In the figure, the same elements as those shown in FIG. 1 are denoted by the same reference numerals.

In the figure, reference numeral 12 denotes illumination means (light source means), reference numeral 14 denotes a slit for preventing color mixing, reference numeral 24 denotes an original (color image) as a reading medium, and reference numeral 28 denotes a transport roller as transport means. It is transported in the scanning direction. Reference numeral 13 denotes a reflecting means, and two folding mirrors 13
a, 13b.

Reference numeral 22 denotes an image forming lens serving as an image forming means, which converts a light beam based on the original 24 into a one-line conversion means R, G via a reflection type one-dimensional diffraction grating (eg, a one-dimensional blazed diffraction grating) 23. , B, and color separation into color image information of three color lights, and forms substantially one line on the corresponding line sensors (light receiving portions) 21R, 21G, and 21B of the monolithic three-line sensor 21 as image reading means. Let me. The image forming means 22 sets the reading medium 4 and the image reading means 21 in an optically substantially conjugate relationship.

Here, to form an image on substantially one line means n
The color image information of (= 3) pieces of color light is 1 / n (= 1/1) in the sub-scanning direction on the surface of the monolithic three-line sensor 21.
3) To form an image by shifting the phase of each pixel.

In the present embodiment, the means for shifting this 1 / n pixel is, for example, the setting data of the one-dimensional diffraction grating 23 as one-line conversion means.

In the present embodiment, the light flux based on the color image information of the original 24 illuminated by the illumination means 12 is limited in light quantity by the slit 14, and is guided to the imaging lens 22 via the two return mirrors 13a and 13b. You. The image is then separated by the imaging lens 22 into color image information of three color lights of R, G, and B via the reflection type one-dimensional diffraction grating 23, and the corresponding licensors 21R, 21G, An image is formed substantially in one line near the surface 21B, and color image information of three color lights is read by the monolithic three-line sensor 21.

At this time, in this embodiment, the licensor 21 of each color light separated by the reflection type one-dimensional diffraction grating 22 is used.
The imaging position on the R, 21G, and 21B planes is
By shifting by / 3 pixels, color image information can be read without color shift even if line-sequential reading processing is performed.

(Fourth Embodiment) FIG. 10 is a schematic view of a main part of a fourth embodiment in which the present invention is applied to a color image writing apparatus. In the figure, the same elements as those shown in FIG. 1 are denoted by the same reference numerals.

This embodiment is different from the first embodiment in that organic EL arrays (light emitting units) of R, G, and B colors are used as light source means, and a plurality of dichroic mirrors are stacked on one-line conversion means. Is used. Other configurations and optical functions are substantially the same as those of the first embodiment, and thus the same effects are obtained.

That is, in the figure, reference numeral 31 denotes light source means, and organic EL arrays 31R, 31G, 31B of R, G, B colors as light emitting portions (light emitting elements) are linearly arranged in three columns. A plurality of luminous fluxes (color lights) modulated by R, G, and B color signals based on the color image information of the original by the driver 6 are emitted (emitted) line-sequentially in the order of N1,... Nn.

Reference numeral 33 denotes a color synthesizing element as one-line conversion means, which is formed by laminating a plurality of dichroic mirrors, and is modulated by each color signal emitted from the light source means 31 in the order of N1,. The optical axes of the luminous fluxes are substantially aligned.

In this embodiment, the R, R based on the color image information of the original by the driver 6 from the light source means 31
A plurality of luminous fluxes (color light) modulated by the G and B color signals
Are emitted (emitted) line-sequentially in the order of N1,... Nn.

The optical axes of the plurality of light beams modulated by the R, G, and B color signals by the color synthesizing element 33 are made substantially coincident with each other. ,... Nn are formed on substantially one line in the order, and line information (color image information) is written line by line.

That is, in this embodiment, the number n of lines constituting one processing set is the same as in the first embodiment.
By superimposing each color light with a phase shift of 1 / n (= 1/3) pixel with respect to (= 3), image writing without color shift can be performed.

In each of the above embodiments, the one-line conversion means is arranged between the imaging means and the light source means (or image reading means). However, the present invention is not limited to this. The present invention can be applied in the same manner as in each of the above-described embodiments even if it is arranged between the reading medium) and the image forming means, or provided in the image forming means.

Further, in each embodiment, there is an advantage that the combination of each optical element (constituting means) can be freely configured as described above.

In each embodiment, as the means for shifting 1 / n pixel, the setting data of the simplest one-line conversion means (optical element) for substantially one-line conversion is used. However, the present invention is not limited to this. For example, the positions of the respective light emitting units constituting the light source unit or the respective light receiving units constituting the image reading unit may be shifted, and these may be any relative positions.

In each of the embodiments, the description has been given of a system in which the recording medium (or the reading medium) moves in the sub-scanning direction.
The present invention is not limited to this. For example, by fixing a recording medium (or a reading medium) and moving a writing head or a reading head other than the recording medium (or the reading medium) in the sub-scanning direction. Or they may be relatively moved.

[0073]

According to the first aspect of the present invention, as described above, a plurality of light beams modulated by each color signal emitted in a line-sequential manner from the light source means in accordance with image information are put on the recording medium surface via the one-line conversion means. When forming an image on substantially one line, instead of completely forming one line as in the related art, the order N1,... Nn of line sequential processing is superimposed by shifting the phase by 1 / n pixel in the sub-scanning direction. Accordingly, it is possible to achieve a color image forming apparatus capable of obtaining a high-quality color image without causing color shift.

According to the second aspect of the present invention, the luminous flux based on the reading medium illuminated by the illuminating means is color-separated into a plurality of color lights via the one-line conversion means as described above, and is substantially one-line on the image reading means surface. When forming an image, a high-quality color image can be obtained without causing color shift by forming an image by shifting the phases of the plurality of color lights in the sub-scanning direction by 1 / n pixel on the image reading means surface. And a color image forming apparatus capable of performing the above-described operations.

[Brief description of the drawings]

FIG. 1 is a schematic view of a main part of a first embodiment of the present invention.

FIG. 2 is an explanatory view showing the principle of the present invention.

FIG. 3 is an explanatory view showing the principle of the present invention.

FIG. 4 is an explanatory view showing the principle of the present invention.

FIG. 5 is an explanatory view showing the principle of the present invention.

FIG. 6 is an explanatory view showing the principle of the present invention.

FIG. 7 is an explanatory view showing the principle of the present invention.

FIG. 8 is a schematic diagram of a main part of a second embodiment of the present invention.

FIG. 9 is a schematic diagram of a main part of a third embodiment of the present invention.

FIG. 10 is a schematic diagram of a main part of a fourth embodiment of the present invention.

FIG. 11 is a schematic view of a main part of a conventional color image forming apparatus.

FIG. 12 is an explanatory view showing the principle of a conventional color image forming apparatus.

FIG. 13 is an explanatory view showing the principle of a conventional color image forming apparatus.

FIG. 14 is an explanatory view showing the principle of a conventional color image forming apparatus.

FIG. 15 is an explanatory view showing the principle of a conventional color image forming apparatus.

FIG. 16 is an explanatory view showing the principle of a conventional color image forming apparatus.

FIG. 17 is an explanatory view showing the principle of a conventional color image forming apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 light source means 1B, 1G, 1R one-dimensional LED array 2 imaging means (rod lens array) 3, 23 one-line conversion means (one-dimensional diffraction grating) 4 recording medium (photosensitive film) 5 thin line document (image information) 6 driver Circuit 7 One-line pixel row 8 Conveying means 9 White light source 10 Detecting means (light receiving element) 101 Light source means 11 Light source section 11B, 11G, 11R Liquid crystal shutter array 12 Lighting means 14 Slit 21 Light receiving means 21B, 21G, 21R Line sensor 22 Connection Image means 31 Light source means 31B, 31G, 31R Organic EL array 32 Imaging means 33 One-line conversion means (color combining element)

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI H04N 1/036 H04N 1/04 D 1/04 1/23 103

Claims (27)

[Claims] 1. A plurality of luminous fluxes modulated by n color signals based on image information from a light source unit in which n light emitting units are linearly arranged in n columns in a line sequence of N1,... Nn. ., Nn on the surface of the recording medium conveyed in the sub-scanning direction by the conveying means via the image forming means. This is a color image forming apparatus that forms an image in a line and forms a line-sequential image. When forming an image in a substantially one line, the order N1,... A color image forming apparatus characterized by being superimposed with a phase shift. 2. The color image forming apparatus according to claim 1, wherein the means for shifting the phase by 1 / n pixel is performed by using setting data of the one-line conversion means. 3. The color image forming apparatus according to claim 1, wherein the n color signals are three color signals of R, G, and B. 4. The color image forming apparatus according to claim 1, wherein said n light emitting units are formed of LED arrays of R, G, and B colors, and said one-line conversion means is formed of a one-dimensional diffraction grating. . 5. The method according to claim 1, wherein the n light emitting units are formed of organic EL arrays of R, G, and B colors, and the one-line conversion unit is formed of a color combining element formed by stacking a plurality of dichroic mirrors. The color image forming apparatus according to claim 1, wherein 6. The color image forming apparatus according to claim 1, wherein the parameter n is three. 7. The color image forming apparatus according to claim 1, wherein said imaging means sets said light source means and said recording medium in an optically substantially conjugate relationship. 8. The color image forming apparatus according to claim 1, wherein at least one of the recording medium and a head made of each element other than the recording medium is movable in a sub-scanning direction. 9. A plurality of luminous fluxes modulated and opened by n light signals based on image information from a light source unit having a light source unit having n light emitting units linearly arranged in n columns and a white light source. .. Nn in the order of N1,... Nn, the optical axes of the plurality of light beams are made substantially coincident by the one-line conversion means, and the surface of the recording medium conveyed in the sub-scanning direction by the conveyance means via the imaging means. A color image forming apparatus which forms an image in a line-sequential manner by forming an image on a substantially one line in the order of N1,... Nn. ... A color image forming apparatus characterized in that Nn are superposed with a phase shift of 1 / n pixel in the sub-scanning direction. 10. The color image forming apparatus according to claim 9, wherein the means for shifting the phase by 1 / n pixels uses setting data of the one-line conversion means. 11. The n color signals are three of R, G, and B.
10. The color image forming apparatus according to claim 9, wherein the number of signals is one. 12. The liquid crystal shutter array according to claim 12, wherein the n light emitting units include a liquid crystal shutter array having R, G, and B filters.
10. The color image forming apparatus according to claim 9, wherein said one-line conversion means comprises a one-dimensional diffraction grating. 13. The color image forming apparatus according to claim 9, wherein the parameter n is 3. 14. The color image forming apparatus according to claim 9, wherein said image forming means sets said light source means and said recording medium in an optically substantially conjugate relationship. 15. The color image forming apparatus according to claim 9, wherein at least one of the recording medium and a head made of each element other than the recording medium is movable in the sub-scanning direction. 16. The color image forming apparatus according to claim 9, further comprising detecting means for detecting a light amount of the spot image formed on the recording medium surface. 17. An image is written on an unexposed film using a light emitting element capable of intensity modulation in accordance with the color signal, and an exposed transmission original is scanned on the same surface to be scanned. 10. The color image forming apparatus according to claim 9, wherein the image is read by converting the signal. 18. A reading medium on an original platen conveyed in the sub-scanning direction by a conveying means is illuminated by an illuminating means, and a light flux from the reading medium is converted into n color light beams by an image forming means via a one-line converting means. A color image forming apparatus that color-separates into color image information, forms an image on a surface of the image reading means substantially in one line, and reads the color image information of the n color lights line-sequentially by the image reading means, When forming an image on substantially one line, the color image information of the n pieces of color light is formed by shifting the phase by 1 / n pixel in the sub-scanning direction on the surface of the image reading means. Image forming device. 19. The color image forming apparatus according to claim 18, wherein the means for shifting the phase by 1 / n pixel is performed by using setting data of the one-line conversion means. 20. The n color signals are three of R, G, and B.
19. The color image forming apparatus according to claim 18, wherein there are two color signals. 21. The color image forming apparatus according to claim 18, wherein said one-line conversion means comprises a one-dimensional diffraction grating. 22. The color image forming apparatus according to claim 18, wherein said parameter n is 3. 23. The color image forming apparatus according to claim 18, wherein said image forming means sets said reading medium and said image reading means in an optically substantially conjugate relationship. 24. The color image forming apparatus according to claim 18, wherein at least one of the reading medium and a head made of each element other than the reading medium is movable in the sub-scanning direction. 25. The color image forming apparatus according to claim 18, wherein said image reading means comprises a monolithic three-line sensor. 26. A light-receiving element in which a plurality of light-emitting elements for emitting a light beam light-modulated based on image information are arranged in a one-dimensional direction, and are linearly arranged in the sub-scanning direction in the order of the light-emitting elements N1,. And the optical axes of the luminous fluxes from the respective light emitting units of the color signal processing means for processing the n color signals line-sequentially are made substantially coincident by the one-line conversion means, and the auxiliary means is conveyed by the conveyance means via the imaging means. This is a color image forming apparatus that forms an image on a recording medium surface conveyed in the scanning direction in substantially one line in the order of N1,... Nn and forms an image in a line-sequential manner. The color image forming apparatus is characterized in that the order of processing N1,... Nn is superimposed with the phase shifted by 1 / n pixel in the sub-scanning direction. 27. A light valve array in which a plurality of light valves for emitting a light beam modulated based on image information are arranged in a one-dimensional direction, and the light valve arrays N1,... Are arranged in a line, and the n
A recording medium which is conveyed in the sub-scanning direction by a conveying means via an image forming means, wherein the optical axes of the light beams from the respective light valve arrays of the color signal processing means for processing the individual color signals are substantially matched by a one-line converting means; This is a color image forming apparatus which forms an image in a line-sequential manner by forming an image on a surface in substantially one line in the order of N1,... Nn. A color image forming apparatus wherein Nn are superimposed with a phase shifted by 1 / n pixel in the sub-scanning direction.