JPH0518519B2 - - Google Patents

Abstract

PURPOSE:To satisfy its image quality with low cost by using an FOT to use sampled picture element data twice at recording for exposure. CONSTITUTION:A video signal processing section consists of a signal input section I inputting an NTSC system color picture RGB and sampling a picture element signal of RGB color, an A/D converting section II reading twice the sampled signal are converting the signal into a digital signal, a digital signal processing section III burying intervals of scanning lines for making it unremarkable and applying gamma correction in matching with the sensitivity of a photosensitive material, a D/A converting section IV converting the digital signal into an analog signal, and an exposure section V exposing the color photosensitive material and correcting the luminous unevenness in this case. In the exposure section V, the system that a fiber optical tube type CRT(FOT) whose scanning face is brought into close contact with the color print paper while scanning the primary color in response to a color picture signal is used and the color print paper is exposed is adopted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a color image recording device for obtaining a color hard copy from a color still image signal.

(Prior Art) Various color printers have been proposed for producing hard copies of color reproduced still images obtained from television receivers, videotape recorders, video disk players, etc., but all of them are expensive and have poor image quality. It wasn't satisfying.

(Object of the Invention) An object of the present invention is to provide a color image recording device that can be realized at low cost and also has satisfactory image quality.

(Structure of the Invention) For this purpose, the color image recording device of the present invention samples each color signal of the three primary colors of a still image to obtain pixel data, A/D converts the obtained pixel data, and stores it in a memory. , the stored data is read out, subjected to processing such as interpolation processing and γ correction, and then D/A converted, and the obtained analog pixel data is input to the FOT and intersected with the horizontal scanning direction scanned by the FOT. In a color image recording device that exposes a color photosensitive material conveyed in the sub-scanning direction using the FOT with each of the three primary color scanning lines, the color photosensitive material is exposed in the sub-scanning direction per horizontal scan by the FOT Transfer pitch S ₁ above
Set S ₁ =3S ₂ for the movement displacement amount S ₂ of the recording scanning line of the FOT in the sub-scanning direction, and execute the movement displacement in the sub-scanning direction in the opposite direction to the conveyance direction of the color photosensitive material. When the movement is performed in the same direction as the conveyance direction of the color photosensitive material, the displacement in the sub-scanning direction is performed in the same direction as the conveyance direction of the color photosensitive material. The configuration is such that the displacement is performed every time the exposure is performed, and the exposure is paused every other horizontal scan.

(Embodiment) FIG. 1 shows a schematic configuration of a video signal processing section of a color image recording apparatus using a photosensitive material. This video signal processing consists of a signal input section 1 that inputs RGB signals for color images of the NTSC system and samples pixel signals of each RGB color;
D conversion section, digital signal processing section that fills the scanning line interval to make it less noticeable and performs γ correction to match the sensitivity of the photosensitive material, D/A conversion section that converts digital signals into analog signals, and color It consists of an exposure section that exposes a photosensitive material and corrects unevenness in the amount of light at that time.

Exposure method In the exposure section, color photographic paper (for example, γ = 2.5) is used as the photosensitive material, and a fiber optic tube type CRT (hereinafter referred to as FOT) that scans the primary colors in accordance with the color image signal is used on this color photographic paper. A method was adopted in which the color photographic paper was exposed to light while the scanning surface of the paper was brought into close contact with the paper.

Figures 2 and 3 are for explaining the exposure part, and the FOT 1 has a red phosphor (for example, P22-RE3) 2 on the surface scanned by the electron beam.
Two types of white phosphors (for example, P4) 3 are provided, and a group of optical fibers 4 are provided in front of the phosphors 2 and 3.
is arranged, and three types of color filters 5r (red), 5g (green), and 5b (blue) are arranged side by side in front of the fiber group 4. A white phosphor 3 is used for the green and blue color filters 5g and 5b, but this is not used for the red color filter 5r, and a different red phosphor 2 is used. This is suitable when the red sensitivity characteristic of the color photographic paper 6 used is in a long wavelength range and it is difficult to obtain cyan density. The color photographic paper 6 has a color filter 5
While being conveyed in the direction of arrow A in close contact with r, 5g, and 5b, the primary colors are exposed.

In FIG. 3, r, g, and b are the recording scanning lines of the previous image of this FOT1, and the pitch between recording scanning lines r and g is lrg, and the pitch between recording scanning lines g and b is lgb.

Method for correcting light intensity unevenness In this FOTY, fine light intensity unevenness occurs due to uneven coating of the phosphors 2 and 3 or variations in optical loss of the fiber 4. If there is unevenness in the amount of light along the same recording scanning line, vertical streaks will appear along the conveyance direction of the color photographic paper, and the image quality will be significantly degraded.

Therefore, as a countermeasure against this unevenness of light intensity, conventionally,
A method has been proposed in which the amount of light is erased by averaging it using a multiple exposure method, or a method in which the amount of light is measured for each pixel in the recording scanning line direction and the input signal is multiplied by the reciprocal of the amount of light to perform correction.

However, the former method is difficult to incorporate signal processing such as scanning line interpolation to fill in between recording scanning lines, which will be described later, and the latter requires accurate light intensity measurement, and if the recording scanning position shifts for some reason, the correction data will become invalid. It has the disadvantage of getting used to it.

Therefore, in the present invention, we focused on the fact that fine light intensity unevenness occurs randomly on the FOT tube surface.
It was decided to move the horizontal recording scanning position slightly in the vertical direction for each horizontal scan. As a result, unevenness in the amount of light appears randomly on the color photographic paper, so it is possible to eliminate vertical streaks that appear in the conveyance direction of the color photographic paper.

However, if you simply adopt this method and move the horizontal recording scanning position randomly in the vertical direction, the synchronization with the conveyance of the color photographic paper will be lost, and the same line will not be able to be exposed accurately for RGB, resulting in poor image quality. to degrade. Therefore, the problem can be solved by keeping the conveying speed of the color photographic paper 6 constant and adjusting the vertical deflection value and the recording timing.

FIG. 4 is a diagram showing the timing. When the recording scanning line position is moved in the opposite direction to the conveyance direction of the color photographic paper for each horizontal scan, the interval D ₁ between the scanning lines recorded on the color photographic paper is D ₁ = S ₁ + S ₂ ... (1) becomes. Here, S ₁ is the transport pitch of the color photographic paper per horizontal scan, and S ₂ is the displacement amount of the recording scanning line in the vertical direction (transport direction). Conversely, when moving the recording scanning line position in the same direction as the conveyance direction of color photographic paper, the movement is performed every horizontal scan in the same way as above, but the exposure is paused every other horizontal scan, and the recording Try not to let it happen. Therefore, the distance D ₂ between the recording scanning lines is D ₂ =2(S ₁ −S ₂ ) (2). In order to prevent uneven conveyance, that is, to expose the same recording scanning line in each RGB color, it is necessary that D ₁ = D ₂ = D (3), and the condition is as follows. , S ₁ =3S ₂ ...(4). For example, if S ₁ = 87 μm, S ₂ = 29 μm
becomes.

Pixel data sampling method Figure 5a shows the still image played on the TV screen 7, and Figure 5b shows the still image shown in the FOT1 above.
The state of printing on color photographic paper 6 by
Each is shown schematically. The horizontal scanning period of an NTSC television signal is 63.5 μs, and
If 640 pixels per scanning line are to be sampled by the usual method, a total of three A/D converters having a conversion speed of about 12 MHz are required for R, G, and B. Further, even if the conversion is performed at this speed, the exposure section requires a recording time of at least 10 seconds, so a memory buffer is required in the signal processing section.

Therefore, in the present invention, as shown in FIG. 6, only one pixel of each RGB color is sampled per horizontal scanning line of the television screen. That is, as shown in Fig. 5a, 490 pixels of each BGR are sampled in the vertical direction per reproduction image forming time of one frame (consisting of an odd field and an even field), and these are sampled for each RGB color during exposure. One recording scanning line. In other words, the image from the vertical left side of the TV screen to the right side is printed on photographic paper.
Sequential exposure recording using FOT. In this way, it is only necessary to A/D convert one pixel for each color during the TV horizontal scanning period of 63.5 μs, and the A/D
As for the conversion section, only one low-speed conversion section having a conversion speed of about 20 μs is sufficient.

The relative sampling position of each color is determined by the distance between recording scanning lines r and g of FOT1, as shown in Figure 3.
Since the interval between recording scans g and b is lgb, points separated in time by a scanning line corresponding to the interval are sampled. Tr, Tg, Tb in Figure 6 are
The sampling time of each RGB signal is shown.

From the above, the relative sampling time difference of each color (Tb - Tg, Tg - Tr) and the screen surface of FOT1 are determined.
The relationship between each recording scanning line interval lgb and lrg of RGB is (Tb-Tg)/△T=lgb/D...(5) (Tg-Tr)/△T=lrg/D...(6) Here, ΔT is the sampling period of pixels of the same color signal in the horizontal scanning line direction of the television screen, and D is the interval between adjacent recording scanning lines. 1/D is the recording density. If formulas (5) and (6) are satisfied, the image data of each color will overlap and no color shift will occur.

Scanning line interpolation method The pixel data obtained by sampling as described above is 640 pixels in the horizontal direction and 490 pixels in the vertical direction of the TV screen for each RGB color, but it seems that this was copied directly onto color photographic paper. , since the recording scanning line structure stands out and the intervals between pixels in the direction along the recording scanning line also become wider, it is necessary to interpolate them.

In the present invention, RGB obtained by sampling once
The pixel data for each color is used twice in succession for exposure, resulting in 1280 pixels in the horizontal direction and 980 pixels in the vertical direction, doubling the number of pixels.

Therefore, in this case, the relationship between the above-mentioned relative sampling time difference and each scanning line interval on the screen of FOT1 is (Tb - Tg)/△T=lgb/2D...(5)' (Tg -Tr)/△T=lrg/2D...(6)' For example, the recording scanning line interval is lrg=lgb=
If it is 3 mm, the resolution between recording scanning lines will be 13 pixels when 1/D=8.6 pixels/mm. If the relationships of equations (5)' and (6)' are satisfied, color misregistration will not occur for the same reason as described above.

γ correction method This is a method of converting the gradation of the input signal by considering the characteristics of the input signal, the light emission characteristics of FOT 1, the sensitivity characteristics of color photographic paper 6, etc.
Perform this for each color data. The present invention employs a table lookup method in which characteristic data as shown in FIG. 7 is written into a memory in advance and corrected output data is obtained by input data specifying the address of the memory. .

Overall Configuration of Video Signal Processing Section FIG. 8 shows a block diagram of the circuit of the video signal processing section of the color image recording apparatus, including the parts described above. 10r, 10g, 10b are NTSC
Terminal for inputting the TV image RGB signal of the system, 1
1r, 11g, 11b are amplifier circuits with high-speed response characteristics that amplify the RGB signals separately; 12r, 12
g, 12b is a sample hold circuit that samples an input signal using a sampling pulse inputted from the terminal 13 and continues to hold the signal at the next sampling. Each of the sample and hold circuits includes an analog switch connected in series to the signal line and turned on and off by a sampling pulse, and a holding capacitor connected in parallel to the output side of the analog switch.

Reference numeral 14 denotes an A/D converter, which sequentially and separately converts the RGB sample signals from the previous stage circuit into 8-bit digital signals in response to a 2-bit RGB selection signal inputted to a terminal 15. This conversion is done at terminal 16
This is performed every time the conversion start signal START is input. 17 is a signal indicating that the conversion is completed
This is a terminal that outputs EOC.

18 ₁ and 18 ₂ are first and second data selectors that distribute input data when transferring it to first and second line memories 19 ₁ and 19 ₂ on the output side. This data selector 18 ₁ and 18 ₂
transfers the input signal to the output side by receiving the signal "L" at the output control terminal OC, and the selection signal DS input to the terminal 22
by the inverter 20, one selector 18
₂ is received as is, and the other selector ₁₈₁ is inverted and received, thereby being selectively selected and transmitting the input data to the output side. Note that when data is not transferred to the output, the output side becomes high impedance, and backflow of data from the line memory side is prevented.

The line memories 19 ₁ and 19 ₂ enter the write state by receiving the signal "L" at the write terminal W, and by receiving the signal "H" at the terminal W and further by receiving the signal "L" at the output enable terminal OE. The state is read. The terminal W of the first line memory ₁₉₁ is connected to the selection signal DS at the terminal 22, the quality write signal W at the terminal 23, and the NAND gate _211.
The terminal W of the second line memory ₁₉₂ inputs the selection signal DS of the terminal 22 to the inverter 2.
Since the inverted signal and the write signal W of the terminal 23 are inputted via the NAND gate ₂₁₂ , when either one of the line memories is in the write state depending on the logical value of the selection signal DS, the other one is in the write state. Not in writing state. Also, regarding reading, when one side reads, the other does not enter the reading state.

24 is a latch, and the selection signal is connected to its terminal WS.
By inputting DS, the transfer data from line memory 19 ₁ or 19 ₂ is latched. This latch is effected by a latch clock of, for example, 100 KHz input to terminal CK.

To summarize the above part, for example, when data is being transferred from the first data selector ₁₈₁ ,
The data is written to the first line memory ₁₉₁ , and at this time the second data selector ₁₈₁ sets the output side to high impedance, and the second line memory 191 sets the output side to high impedance.
9 ₂ enters the read state and transfers the read data to the latch 24 at the next stage.

Here, sample hold circuits 12r, 12
The operation of the circuit from latch 24 to latch 24 will be explained with reference to the timing charts of FIGS. 9 and 10.

As shown in the timing chart of FIG. 9, during 1H (first horizontal scanning period) of an odd field, the R pixel data of the scanning point at the rising edge of the sampling pulse Sr is sampled, and then the R pixel data of the scanning point at the rising edge of the sampling pulse Sr is sampled. G pixel data at the scanning point at the rising point of the sampling pulse Sb and B pixel data at the scanning point at the rising point of the sampling pulse Sb are sequentially sampled and held.

The RGB pixel data signals held in this way are R pixel data, G pixel data, B
The pixel data is converted into a digital signal by the A/D converter 14 in this order. This A/D converter 14
inputs a 2-bit RGB selection signal to the terminal 15, and performs conversion processing every time the conversion start signal START arrives at the terminal 16. In this conversion start signal, the start signal for R pixel data at the time of first conversion is obtained by processing the sampling pulse Sr, but the conversion start signal for the next G pixel data and B pixel data is for the end of conversion. signal
It is obtained by processing EOC.

The above sampling and A/D conversion are performed for pixels at the same time point from the horizontal synchronizing pulse Hp for each RGB color from the first scanning line to the last scanning line of the odd field on the TV screen, and continue. The same process is performed for even fields. That is, during frame formation, pixel data for each of 490 pixels along one line of RGB in the vertical direction shown in FIG. 5a is obtained.

The next sampling and A/D conversion will be the 10th
As shown in b in the figure, while forming the next frame, one pixel along the horizontal scanning line of the television signal (corresponding to △T described above)
Do the same for the pixels that are shifted by
Obtain RGB pixel data. Sampling in the same way as below, per horizontal scanning line of the TV screen
Obtain 640 pixel data for each RGB color.

The digital data for each vertical RGB line shown in FIG. 5a, obtained by conversion as described above, passes through either the first data selector 18 ₁ or the second data selector 18 ₂ , It is temporarily stored in either the first line memory 19 ₁ or the second line memory 19 ₂ .

Here, when the selection signal DS is "H", the first data selector 18 ₁ is selected, the first line memory 19 ₁ is not in the read state, the NAND gate 21 ₁ is opened, and the second line memory 19 ₂ is in read state and NAND gate 2
1 ₂ closes the gate.

Therefore, in the first line memory ₁₉₁ ,
Every time a write signal arrives at terminal 23, RGB
Write pixel data for each color. This writing is '
This is performed over a frame, and in total, data for each pixel in the vertical direction of the television screen (see FIG. 5a), that is, 490 pixels, is written for each color of RGB.

On the other hand, in the second line memory ₁₉₂ , the pixel data previously written in the same manner as above is read out, but the readout is R pixel data 490.
Each pixel is successively read out twice from the first pixel data, and a total of 980 pixels are read out.
Next, the G pixel data is read out twice in the same way for 980 pixels, and then the B pixel data is read out twice in the same way.
Each of the 980 pixels is read out and transferred to the latch 24. As a result, the pixel data along one recording scanning line for each of RGB becomes 980 pixels.

This reading of RGB pixel data is completed during sampling and A/D conversion for one frame, and reading in exactly the same way is performed during the time for the next frame. Therefore, the sampling was 640 per horizontal scanning line of the TV screen,
Pixel data for 1280 recording scanning lines, which is twice that amount, can be obtained. As a result, adjacent recording scanning lines are exposed with the same pixel data, filling the spaces between the recording scanning lines and preventing the scanning lines from standing out.

Since the selection signal DS is inverted once every two frames (see Figure 10g), the data selector 1
8 ₁ and 18 ₂ and line memories 19 ₁ and 19 ₂ are switched every two frames, pixel data is alternately written to the line memories 19 ₁ and 19 ₂ , and the written pixel data is alternately read. (See Figure 10c, d).

Reference numeral 24 denotes a γ correction circuit, which is composed of a ROM storing correction characteristic data as shown in FIG. 7, for example. For data reading, 8-bit pixel data from the latch 24 is input as an address signal, and pixel data corrected from the input data is outputted. Note that the pixel data to be output is
As a 10-bit signal, it allows for more detailed gradation expression. In this γ correction circuit 25, each characteristic for R, G, and B is selected by a 2-bit RGB selection signal applied to a terminal 26. Note that a mask signal for making the output pixel data zero luminance data is also applied to this terminal 26 at a specific timing, which will be described later.

27 is a buffer, 28 is a D/A converter that converts digital pixel data into an analog signal, 29 is an amplifier circuit, and 30 is a driver that converts the pixel data signal to a level that can drive FOT1. 31 is
This is a horizontal deflection circuit that outputs a horizontal sweep signal for FOT1, and outputs a triangular wave shown in FIG. 10e in synchronization with the reading of pixel data from the line memories 19 ₁ and 19 ₂ . 32 is a vertical deflection circuit that outputs a vertical sweep signal, and outputs a signal for determining the horizontal sweep position for RGB (see FIG. 10f).

This vertical deflection circuit 32 selectively inputs and outputs an R recording scanning line reference position signal Vr, a G recording scanning line reference position signal Vg, and a B recording scanning line reference position signal Vb using analog switches 33r, 33g, and 33b. are doing. 34 is the 2-bit bit that makes the selection.
A terminal 35 for inputting an RGB selection signal is a logic circuit that generates a selection timing signal. The analog switches 33r, 33g, and 33b are switched in this order to output reference position signals in the order of Vr, Vg, and Vb in synchronization with the horizontal sweep.

Reference numeral 36 denotes a memory such as a ROM that stores recording scanning line position movement amount data for eliminating vertical streaks due to uneven light intensity on the front surface of the FOT 1. New data is read out from this memory 36 for each frame of the input video signal, that is, each time each RGB scan by FOT1 is completed, and the D/A
The signal is converted into an analog signal by a converter 37 and applied to the vertical deflection circuit 32 as a correction signal.

Therefore, each recording scanning line reference position signal for RGB
The above correction signal is added to Vr, Vg, and Sb,
Each recording scanning line position of RGB is a position moved from the reference position (rgb in Figure 3), and this position changes as explained in Figure 4, so light intensity correction is performed as explained in Figure 4. It will be done.

When moving the recording scanning line in the opposite direction to the conveyance direction of the color photographic paper, the data of the movement amount S ₂ is increased as S ² , 2S ₂ , 3S ₂ ...100S ₂ ... each time it is read, and then Next time, when moving in the same direction as the conveyance direction, decrease the number to 100S ₂ , 3S ₂ , 2S ₂ , S ₁ . Therefore, the memory 36 has the following
Data such as S ₁ , 2S ₂ , 3S ₂ ...100S ₂ ... are stored and read out in order. When exposing one sheet of color photographic paper, the image should be read out 4 to 10 times back and forth.

When moving the recording scanning line in the same direction as the conveyance direction of the color photographic paper, as explained in FIG.
A pause control signal is input to the γ correction circuit 2 for one frame formation time regardless of the input data.
Pixel data with zero luminance is output to the output side of 5.

Also, even during this pause, the line memory 19 ₁ , 1
At step ₉₂ , pixel data is read out, but this pixel data is not used for recording. Therefore, the pixel data read out during the pause is read out again in succession so that the continuity of the image is not impaired. Therefore, in this case, if the selection signal DS is inverted at the completion of 2 frames, then 3
This is done when a frame is completed, and the next time is when two frames are completed.

By the way, when the recording scanning line position is changed as described above, a difference occurs in the average amount of light at each scanning line position, and this time, instead of the vertical stripes along the conveyance direction of the color photographic paper, there are also vertical stripes along the scanning line direction. Since horizontal streaks may be noticeable, correction is required if this average light amount is kept constant.

Therefore, the correction signal from the D/A converter 37 in FIG.
After adjustment is made again according to each RGB color at 8b, analog switches 39r, 39g, and 39b are used to synchronize with the sending of RGB signals from the D/A converter 28, and the amplifier circuit 29 adds to each RGB signal, Adjusting brightness. The level adjusters 38r, 38g, and 38b are used to adjust in advance the difference between the brightness levels in front of the color filters 5r, 5g, and 5b of the FOT1, which are not necessarily the same.

In addition, when exposing by FOT1, both ends of the color photographic paper 6 along the conveying direction are at least
Interval between R and B recording scanning lines of FOT1 (lrg, lgb)
(Refer to Figure 3), it is not possible to expose the same area to the three primary colors of RGB, resulting in a discolored image. Further, complete data may not be obtained at the time of sampling on both sides of each recording scanning line of each RGB. Therefore, in order not to expose the four circumferential parts of the color photographic paper 6,
In the γ correction circuit 25, when the pixel data of those parts is input, a mask signal is inputted from the terminal 26 to mask the data of the four circumferential parts,
Make sure that the four circumferential parts are not exposed.

Overall configuration of the signal system of the recording device Figure 11 shows the entire path of the video signal and control signal of the color image recording device as blocks, and this device is composed of a signal processing section X and a printer section Y. be done. The signal processing section X includes the above-described video signal processing section 51 (FIGS. 3 and 8),
A CPU 52 that controls the whole, a group of keys 53 for operation,
It is composed of a display group 54 and a buffer 55 for exchanging signals between each part. The printer unit Y also includes the above-mentioned FOT 1, a paper feed motor 56 consisting of a synchronous motor for feeding color photographic paper, a conveyance motor 57 consisting of a pulse motor for conveying color photographic paper, and a drive that sends a drive signal to the motor. A circuit 58, a non-contact type paper presence/absence sensor 59 such as an optical reflection type that detects whether color photographic paper is in a supply magazine described later, and a paper presence/absence sensor 59 that detects whether color photographic paper has bitten into a paper feed roller described later. A non-contact paper feed sensor 60 detects whether or not color photographic paper is ejected, a non-contact paper ejection sensor 61 detects whether or not color photographic paper is ejected, an amplifier group 62 and a buffer 63 amplify the sensor signal.

Mechanical Configuration of Printer Section FIG. 12 is a side view of the mechanism of printer section Y. Reference numeral 71 is an outer case, and 72 is a pedestal (rail), on which a removable supply magazine 73 is placed. This supply magazine 73 is provided with a lid 75 that closes an opening 74, and a push plate 77 that applies pressure to the loaded color photographic paper in response to the elastic force of a spring 76 is provided inside. The color photographic paper 6 is loaded with its photosensitive surface facing downward (towards the opening 74). Reference numeral 78 is a cutting board for preventing two or more sheets of color photographic paper 6 from coming out at the same time. A microswitch 79 detects the open state of the shutter 78. Further, reference numeral 98 denotes a presser roller that presses down the color photographic paper, and since the color photographic paper is bent at this portion, it is possible to improve the smoothness and reduce the stroke of the suction cup, which will be described later.

Reference numeral 80 denotes a take-out device for taking out the color photographic paper 6, and its front view is shown in FIG. Pins 82 are engaged with L-shaped guide holes 81a formed on both sides of the frame plate 81, and a suction cup mounting body 83 is attached between the pins 82 on both sides. The paper presence/absence sensor 59 described above is attached to the suction cup mounting body 83, and the two suction cups 8 are attached so that an upward elastic force is applied by the spring 84.
5 is attached. In addition, this suction cup mounting body 85 has an internal portion connected to a check valve 8 through a hose 86.
It is connected to 7. 87a is a projection that opens the check valve 87 when pushed. This suction cup mounting body 83
has two arms 88, 8 on each side thereof.
It is connected to the upright side 90a of the slide plate 90 via 9. A roller 91 is provided on the slide plate 90, and is engaged with a guide elongated hole 81b formed on the lower side of the frame plate 81. Note that a protrusion 81d is provided on a rising side 81c at the tip of the frame plate 81, with which a protrusion 87a of the check valve 87 comes into contact.
The paper feed motor 56 has a built-in deceleration mechanism, is fixed to the frame plate 81 via a pedestal 92, and its output shaft 5
A disk 93 is fixed to 6a, and an arm 94 is pivotally supported on the outer periphery of this disk 93, and this arm 94 is pivotally supported on a pin 95 implanted in the slide plate 90.

In this mounting device 80, the paper feed motor 56
Each time the disk 93 rotates once, the slide plate 90 connected by the arm 94 reciprocates once in the direction of arrow C. Also, during this reciprocation, the suction cup mounting body 8
3 receives the movement of the slide plate 90 via the arms 88 and 89, so it is guided by the guide hole 81a and reciprocates once in the direction of arrow F, that is, in an L-shape in the up-down and front-back directions. When the suction cup 85 returns to the state shown in FIG. 12, that is, to the lowermost position, the protrusion 87a of the check valve 87 comes into contact with the protrusion 81d, and the inside communicates with the atmosphere. The rotational position of the paper feed motor 56 at this time is defined as the home position.

Therefore, in this take-out device 80, when the suction cup 85 rises to the uppermost position, it comes into contact with the color photographic paper 6 through the opening 74 of the supply magazine 73, and the suction cup 8
5, the suction cup 85 is pushed up and deformed, the air inside the suction cup 85 is discharged from the check valve 87, and the color photographic paper 6 is suctioned under negative pressure. When the suction cup 85 moves downward, the color photographic paper 6 is separated by the cutting board 78 and only one sheet is taken out. When the suction cup 85 descends to the lowest position, it moves forward, and the protrusion 87a of the check valve 87 comes into contact with the protrusion 81d, and the check valve 8
Air enters into the suction plate 7 from the outside, the negative pressure suction on the suction cup 85 is released, and the color photographic paper is peeled off from the suction plate 85. In this way, the suction cup 85
One sheet of color photographic paper is fed for each round trip.

Reference numeral 96 denotes a paper feed roller, which further feeds the color photographic paper 6 that has been attracted and taken out by the take-out device 80, and is rotated by the output of the conveyance motor 57 (not shown in FIG. 12). It's getting old. A paper feed sensor 60 is provided at the exit of the paper feed roller 96, and detects whether or not color photographic paper has bitten into the paper feed roller 96. 97
is a guide plate that guides the conveyance of color photographic paper.

FOT1 is provided below this guide plate 97. Reference numeral 101 denotes a push plate for pressing the color photographic paper into close contact with the front surface 102 of the FOT 1, and receives the elastic force of a spring 103.

104 is a conveyance roller, which is used to accurately convey the color photographic paper on the front side of FOT1.
It is designed to rotate in response to the output of the transport motor 57. A paper discharge sensor 61 is provided below this conveyance roller 104.

110 is a dark box attached to the main body, and an opening 112 is closed with a lid 111. 113 is a micro switch that detects whether the lid 111 is open or not.

Reference numeral 120 denotes a receiving magazine, which is detachably housed in the dark box 110. This receiving magazine 120 is provided with a lid 122 for closing an opening 121 and a guide claw 123 for stacking color photographic papers 6 carried in through the opening 122. Note that the recess 111a of the lid 111 of the dark box 110 is connected to the lid 12 of the receiving magazine 120.
It is designed to engage with the protrusion 122a of No. 2,
Both lids are opened and closed at the same time. Further, the receiving magazine 120 is structured so that it cannot be removed unless the lid 122 is closed. When the lid 122 is closed, the lid 111 of the dark box 110 is naturally closed.

The supply magazine 73 and the receiving magazine 120 are
The structure is such that it cannot be removed from the outer case 71 unless the lids 75, 122 are closed. In addition, especially regarding the receiving magazine 120, when the lid 122 of the receiving magazine 120 is closed, the lid 111 of the dark box 110 is also closed. , the light does not enter the inner part, so even if unexposed color photographic paper remains in the supply magazine 73, the photographic paper will not be exposed to light.

Photographic paper feeding control operation for exposure This color image recording device is shown in Fig. 11.
The operation is controlled by the CPU 52 and others according to a preset program, and exposure is performed. In this case, the control clock is, for example, 600Hz.
It is. Next, the exposure control operation will be explained with reference to the flowcharts from FIG. 14 onwards.

First, when the start key (operated each time exposure is performed) is pressed, the entire apparatus is set to the initial state by an initial setting routine shown in FIG. At step 131, it is determined whether the lids of supply magazine 73 and receiving magazine 120 are open. Micro switch 7 detects the opening of this lid.
9,113. And no (hereinafter referred to as N. In case of yes, it is referred to as Y).
In this case, the opening of the lids is checked again in step 132, and if it is determined again in step 133 that both lids are still not open, a warning that the lids are not open is issued in step 134 (buzzer sounds, indicator lamp lights, etc.).
is emitted.

If the lid is open, step 135 sets P mode to 1, and step 136 sets E mode to 2. P mode=1 is an exposure start mode. E mode is a mode during exposure, and is expressed as follows using 5-bit logic.

E mode = 1 → 00001 〃 2 → 00010 〃 3 → 00011 E mode 4 → 00100 〃 5 → 00101 〃 8 → 01000 〃 16 → 10000 Then, in step 137, the paper feed motor 56 is turned on, and the paper presence sensor 59 After turning on the
At step 138, all trouble counters (paper-free trouble counter and paper-dropping trouble counter) are reset to zero. Next, in step 139, the process waits until the paper feed motor 56 leaves the home position (approximately when the suction cup 85 starts to move upward). Then, after leaving the home position mentioned above, the first
The process advances to the exposure operation routine shown in FIG.

This routine continues through step 14 until
The current E mode is determined from step 1 to step 145. As mentioned above, currently E mode =
2, the logic is ``00010'', so the result is Y at step 142, and the photographic paper removal routine is executed.
I'm in FFB1.

This routine is shown in FIG.
At step 51, it is determined whether or not there is color photographic paper 6 in the supply magazine 73 by the paper presence/absence sensor 59 which has been turned on. If N, step 15
At step 2, it is determined again whether or not the paper feed motor 56 is at the home position, and if it is N, the routine returns to the routine shown in FIG. 2
It is determined in step 153 whether or not it is the third time. N
If so, that is, if it is the first time, step 154
Then, the paper out trouble counter is set to 1, and the process returns to step 139 of the routine in FIG. 14 to detect it again. If the determination in step 153 is Y, in step 155 the paper feed motor 56 is turned off, the paper presence/absence sensor 59 is turned off, and in step 156 a paper out alarm is issued to ensure that the color photographic paper in the supply magazine 73 runs out. inform that the

That is, here, the presence or absence of color photographic paper is detected by the paper presence/absence sensor 59, but if there is no detection result, it may be a false detection, so the same detection is performed again and an alarm is generated if there is no detection result. let

If the judgment in step 151 is Y, in step 157 the conveyance motor 57 is turned on to rotate the paper feed roller 96 and the conveyance roller 104, the paper feed sensor 60 is turned on, and the used paper presence/absence sensor 59 is turned off. let Then, in the next step, 158 cm ² E mode is set to 4, and the process returns to the routine shown in FIG. 15, where judgments are made sequentially from step 141.

Since the logic of E mode = 4 is "00100",
The determination at step 143 is Y, and the photographic paper feeding routine FFF1 shown in FIG. 17 is entered. First, in step 161, it is determined whether or not the paper feed motor 56 has returned to the home position.If N, the process returns to the routine shown in FIG. 15, but if Y, the process returns to step 162.
At this point, it is determined whether or not the removed color photographic paper has bitten into the paper feed roller 96 based on the detection operation of the paper feed sensor 60. If the determination in step 162 is N, then in the next step 163 it is determined whether or not this determination is the second time.
If it is the first judgment, select N and proceed to step 16.
In step 4, the paper dropout trouble counter is set to 1, in step 165 the E mode is set to 2, in step 166 the conveyance motor 57 is turned off to stop the paper feed roller 96, and in step 167 the paper presence sensor 5 is set again.
9 is turned on, and the paper feed sensor 60 is turned off. Then, the process returns to the routine shown in FIG. 15 and repeats the operation of taking out the paper. If the determination in step 163 is Y, then in step 168 both motors 56,
57 is turned off, and the paper feed sensor 60 is turned off.
Then, in the next step 169, a paper dropout alarm is issued.

That is, if the color photographic paper does not bite into the paper feed roller 96, the paper feed sensor 60 detects the color photographic paper up to two times in the same way as when taking out the color photographic paper described above, and the sensor 60 still detects the color photographic paper. If this is not the case, it is determined that the color photographic paper taken out from the supply magazine 73 by the suction cup 85 has fallen off midway through, and a warning is issued.

When it is determined by the operation of the paper feed sensor 60 that the color photographic paper has bitten into the paper feed roller 96,
Step 162 becomes Y, and the process proceeds to step 170, where the paper feed motor 56 is turned off to stop taking out the photographic paper, and the paper feed sensor 60 is turned off, and then the process proceeds to step 170.
Turn on the paper ejection sensor 61 near FOT1. Then, in step 714, the E mode is set to 1, and the first
Return to the routine shown in Figure 5.

Since E mode=1 is logically "00001", step 141 becomes Y, and the photographic paper transport/exposure routine FFF2 shown in FIG. 18 is entered. first,
Since it is N in step 181, the next step 1
The process proceeds to step 82, and since the answer is N here, the process proceeds to the next step 183. The same steps of this routine FFF2 and the routine shown in FIG. 15 are repeated in sequence until the photographic paper conveyed by the paper feed roller 96 bites into the lower conveyance roller 104 and is detected by the paper discharge sensor 61.

When detected by the paper ejection sensor 61, step 18
3 becomes Y, so in step 184 E mode =
5, the time counter is set in step 185.
Set to T3. This T3 is the time required to further feed the photographic paper by a distance L3 (see FIG. 12) downward from the paper discharge sensor 61. This is because when the leading edge of the photographic paper bites into the transport roller 104, the end has not come off the paper feed roller 96.
This is to allow the paper to be fed further so that the end comes off the paper feed roller 96.

Returning to the routine of FIG. 15 again, since the logic is "00101" in E mode=5, step 141 becomes Y as described above, and the photographic paper conveyance/exposure routine FFF2 is entered again. Step 181 is N and step 182 is Y, so step 1
At 86, it is set to T3 and the time counter is decremented by 1. This routine and the first
The same steps in the routine shown in Figure 5 are repeated one after the other.

When time T3 has elapsed and the time counter reaches zero, step 186' becomes Y, and step 18
At step 7, the paper discharge sensor 61 is turned off, and the conveyance motor 57 is also turned off to stop the rotation of the conveyance roller 104. At this time, the leading edge of the photographic paper has advanced by L3 from the paper discharge sensor 61, and its end has come off the paper feed roller 96. Then in step 188 0.2
After waiting for about a second, step 189
Then, the conveyance motor 57 is now reversed, the conveyance roller 104 is reversed, and the photographic paper stuck there is reversed. Next, in step 190, the E mode is set to 8, and in the next step 191, the time counter is set to T1+T3. T1 is the distance L1 required for the leading edge of the photographic paper to move back to the limit where it does not come off the biting part of the conveyance roller 104 (see Figure 12)
This is the time equivalent to .

When the program returns to the routine shown in FIG. 15 again, the logic is "01000" in E mode=8, so step 144 becomes Y, and the photographic paper reversal routine FFB2 shown in FIG. 19 is entered. here,
In step 201, the set time counter is decremented by 1, and the process proceeds to step 202, where this routine and the same steps of the routine shown in FIG. 15 are repeated in sequence until the time counter reaches zero. and,
When time T1+T3 has elapsed, step 202 returns Y.
Therefore, in step 203, the conveyance motor 57 is turned off to stop conveyance under CPU control. In the next step 204, an exposure start signal is sent from the CPU 52 to the video signal processing section 51 to start exposure. The conveyance of the photographic paper during this exposure is carried out by controlling and rotating the conveyance motor 57 in response to a signal synchronized with the exposure scanning signal in the video signal processing section 51. Then, in step 205, the E mode is set to 16, and when the exposure is confirmed in step 206, a message indicating that exposure is in progress is displayed in step 207, and the process returns to the routine shown in FIG.

In this routine of FIG. 15, since E mode=16 this time, the logic is "10000" and step 145 becomes Y. Therefore, the process enters the photographic paper exposure end routine shown in FIG. The steps between step 211 and the routine of FIG. 15 are repeated in sequence until the exposure is completed. When the exposure is completed, the exposure display is turned off in step 212, and the paper discharge sensor 6 is turned off.
1 is turned on to enable detection. Next, in step 213, the transport mode 57 is turned on again for CPU control. Then, in step 214, E mode =
3, then set the time counter to T2. This time T2 is the time when the conveyance roller 104
This is the time it takes for the photographic paper to separate from the

When the program returns to the routine shown in FIG. 15 again, the E mode is 3, so the logic is "00011" and step 141 becomes Y. Therefore, the photographic paper conveyance/exposure routine shown in Fig. 18
Enter FFF2. Then, since step 181 becomes Y, the time counter set to T2 is decremented by 1 in step 192, and the process proceeds to the next step 193.
After proceeding to the routine shown in FIG. 15, the same steps are repeated sequentially. When time T2 has elapsed, the time counter becomes zero and step 193 becomes Y, so in step 194 the transport motor 57 is turned off and the transport rollers are stopped. Then, in the next step 195, it is determined whether or not the ejection of the photographic paper has been completed by the detection operation of the paper ejection sensor 61, and if YES, the completion of paper ejection is notified by a short buzzer or the like in step 196. be done. If the paper discharge sensor 61 does not detect completion of paper discharge, that is, if it continues to detect photographic paper, the paper discharge sensor 61 is turned off in step 197, and in the next step 198, a paper discharge trouble is alerted.

As described above, in this control, the photographic paper is taken out →
Paper is fed, transported, exposed, and ejected. When taking out the paper, the presence or absence of paper is detected, and if there is no paper, the paper is checked twice. Furthermore, after taking out the photographic paper with the suction cup 85, it is checked twice at maximum whether the photographic paper has fallen off from the suction cup when the paper is fed. Therefore, troubles related to photographic paper feeding can be effectively dealt with. Furthermore, when the leading edge of the photographic paper is biting into the conveying roller 104, the end is still biting into the paper feed roller 96, so conveyance is reliable, and exposure is performed with the edge removed from the paper feeding roller. Therefore, the occurrence of deviations in the exposure transport can be effectively prevented.

(Effects of the Invention) As described above, according to the present invention, since FOT is used, a color image recording device can be realized at low cost, and sampled pixel data can be used twice during recording for exposure. Therefore, it is possible to achieve satisfactory image quality after exposure, development and fixing.

[Brief explanation of the drawing]

Figure 1 is a schematic block diagram of the video signal processing section.
Figure 2 is an explanatory diagram of the structure of the FOT, Figure 3 is an explanatory diagram of the front side of the FOT, Figure 4 is a scanning line interpolation characteristic diagram, and Figure 5 is a diagram showing the relationship between sampling and exposure.
is a schematic diagram of a TV screen, b is a schematic diagram of photographic paper and FOT, Figure 6 is a diagram explaining the sampling timing of RGB signals, Figure 7 is a γ correction characteristic diagram, and Figure 8 is a specific diagram of the video signal processing section. 9 and 10 are timing charts, and FIG. 11 is a block diagram showing the signal path of the color image recording device.
Figure 12 is a side view of the printer mechanism;
Figure 3 is a front view of the extraction device, Figures 14 to 2
Figure 0 is a flowchart of printer section control. Explanation of symbols, 1...FOT, 2, 3...fluorescent material, 4
...Optical fiber, 5r, 5g, 5b...Color filter, 6...Color photographic paper, 7...TV screen, 10r, 10g, 10b...Terminal, 11r, 1
1g, 11b...Amplification circuit, 12r, 12g, 12
b...Sampling hold circuit, 13...Terminal, 1
4...A/D converter, 15-17...terminal, 18 ₁ ,
18 ₂ ... data selector, 19 ₁ , 19 ₂ ... line memory, 20 ... inverter, 21 ₁ , 21 ₂ ... NAND gate, 23 ... terminal, 24 ... latch, 25 ... γ
Correction circuit, 26...terminal, 27...buffer, 28...
D/A converter, 29... amplifier circuit, 30... driver, 31... horizontal deflection circuit, 32... vertical deflection circuit,
33r, 33g, 33b...Analog switch, 3
4...Terminal, 35...Logic circuit, 36...Memory, 37
...D/A converter, 38r, 38g, 38b...Level adjuster, 39r, 39g, 39b...Analog switch, 51...Video signal processing section, 52...CPU,
53... Key group, 54... Display group, 55... Buffer, 56... Paper feed motor (synchronous motor), 57... Conveyance motor (pulse motor), 58... Driver, 5
9... Paper presence/absence sensor, 60... Paper feed sensor, 61... Paper discharge sensor, 62... Amplifier group, 63... Buffer, 7
1... Outer box, 72... Frame (rail), 73... Supply magazine, 74... Opening, 75... Lid, 76... Spring, 77... Push plate, 78... Sabaki plate, 79... Micro switch, 80... Ejecting device, 81 ...Frame board, 8
2...Pin, 83...Sucker mounting body, 84...Spring, 85...Sucker, 86...Hose, 87...Check valve,
88, 89...Arm, 90...Slide plate, 91...
Roller, 92... Frame, 93... Disc, 94... Arm, 95... Pin, 96... Conveyance roller, 97... Guide plate, 98... Press roller, 101... Push plate, 10
2...Front of FOT, 103...Spring, 104
... Conveyance roller, 110 ... Dark box, 111 ... Lid, 11
2...Opening, 113...Micro switch, 120...
Receiving magazine, 121...opening, 122...lid, 12
3...Guide claw.

Claims (1)

[Claims] 1. Pixel data is obtained by sampling each color signal of the three primary colors of a still image, and the obtained pixel data is A/D
After converting and storing it in memory, reading out the stored data and performing processing such as interpolation processing and γ correction, D/A conversion is performed, and the obtained analog pixel data is
In a color image recording apparatus, a color photosensitive material is input to a FOT and is transported in a sub-scanning direction intersecting a horizontal scanning direction scanned by the FOT, and is exposed by the FOT with each of the three primary color scanning lines, The transport pitch S ₁ in the sub-scanning direction of the color photosensitive material per horizontal scan by the above FOT is
Set S ₁ =3S ₂ for the movement displacement amount S ₂ of the recording scanning line of the FOT in the sub-scanning direction, and execute the movement displacement in the sub-scanning direction in the opposite direction to the conveyance direction of the color photosensitive material. When the movement is performed in the same direction as the conveyance direction of the color photosensitive material, the displacement in the sub-scanning direction is performed in the same direction as the conveyance direction of the color photosensitive material. 1. A color image recording device characterized in that the displacement is performed every other horizontal scan, and the exposure is paused every other horizontal scan.