JPH03296035A - Light transmission type original reading device - Google Patents

Abstract

PURPOSE:To guarantee a time for irradiating an original and to facilitate control for reading the original by detecting the replacement of films and starting a counter for limiting a lamp lighting time again. CONSTITUTION:A film projector 102 is connected with a copying device 101, and the film is set in a carrier 103 or the film is arranged under a Fresnel's lens part 105 in a mirror unit 104, and then, by irradiating the film by the lamp incorporated with a film projector 102, a film image is read by a CCD image sensor incorporated with the copying device. And after detecting that the light transmission type original is started to be irradiated, the counter is started so as to guarantee the time for irradiating a prescribed original. Thus, there is no possibility that the lamp is turned off in a reading operation state, so that the need of complicated control such as limiting the lighting time can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light-transmitting original reading device that reads an image obtained by irradiating a light-transmitting original such as a film or OHP paper.

[Prior Art] In order to protect a light-transmitting original, a conventional light-transmitting original reading device starts a predetermined limit counter when an illumination lamp is turned on, and turns off the lamp when the counter ends to limit the lighting time.

[Problems to be Solved by the Invention] However, the above conventional example has the following drawbacks when reading a plurality of light-transmitting originals. That is, since the lighting time of the lamp after starting to read a predetermined document is not guaranteed, there is a risk that the lamp may go out during the reading operation.

Further, there is also the drawback that complicated control is required, such as having to complete a predetermined control from the start to the end of lighting, or having to turn off and stop lighting the lamp at predetermined timings.

SUMMARY OF THE INVENTION An object of the present invention is to provide a light-transmissive document reading device that solves the above-mentioned problems.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes an irradiation means for irradiating a light-transmitting original, a counter for counting the continuous irradiation time of the light-transmitting original by the irradiation means, and a counter for counting the continuous irradiation time of the light-transmitting original by the irradiation means; a detection means for detecting the start of irradiation by the irradiation means on a document; a start means for starting the counter based on the detection timing of the detection means; and a stop for stopping the irradiation by the irradiation means when the counter finishes counting. It is characterized by having the means.

[For production]

According to the present invention, a counter is started by detecting that a new light-transmissive original has begun to be irradiated, and the time for irradiating a predetermined original is guaranteed.

[Example〕 Examples of the present invention will be described below.

FIG. 1 is an external view of a light transmissive original reading device according to this embodiment. This is a copying machine 101 connected to a film projector 102, and a film is transferred to a carrier 103.
Alternatively, the film is placed under the Fresnel lens section 105 of the mirror unit 104 and illuminated by a lamp built into the film projector 102, thereby causing the CCD image sensor built into the copying apparatus to read the film image.

FIGS. 2(a) and 2(b) illustrate examples of carriers, in which (a) is for negative film, and (b) is for positive film. For negatives (a), a negative film consisting of six continuous frames is inserted into a ladder-like holder part 201, inserted into a magazine section 202, and desired frames are selected by adjusting the depth. For positive film (b), the positive film is cut out one frame at a time and mounted on cardboard for slides, which are arranged in the magazine section 203, and the desired frames are selected by reciprocating the slide lever 204 to feed them one by one. .

Also, FIG. 2(c) shows what is called an auto carrier, in which a positive film mounted on cardboard is placed in each slot provided radially in a donut-shaped tray 205, similar to the positive film shown in FIG. 2(b). tray drive unit 20
6 to select a desired slot piece.

FIG. 3 shows an example of the operation section of the copying machine, and will be described below.

Key 301 is a numeric keypad group used for setting the number of copies, etc. Key 302 is a clear/stop key that requests clearing the number of copies or canceling the operation, Key 303 is a reset key that returns the copy mode to the standard state, Key 304 is for copying operation The start key 306 is a key for adjusting the copy density, and the result is displayed on the display 305. The key 308 is a key for selecting the paper feed stage, the key 310 is a key for setting the copy magnification to the same magnification, the key 309 is an enlargement magnification selection key and a reduction magnification selection key, and the key 329 is a key for selecting and canceling the enlargement continuous copying mode.

The display 319 is a dot matrix liquid crystal display, and the key group 307 is a control key used to select or change the display contents of the display 319. i.e. key 307
-U, d, β, and r are used to move the indicators in the display 319 upward, downward, left, and right, respectively, to select the displayed content, and the key 307-ok is used to instruct the end of the selection.

The keys 311 are guide keys and LEDs used when displaying operation explanations and function explanations on the display section 319. While the LED is lit, it indicates the guidance mode.

The key 313 is a preheating key used to place and release the device into a preheated state. The key 315 is used to select a color, and the selection result is sent to the LE1131.
4 will be displayed. A key 316 is a key by which the machine automatically adjusts the copy density, and the result is displayed on an LED 317.

The key 323 is a key for setting the zoom magnification, and a setting screen is displayed on the display unit 319. The key 326 is a key for setting vertical and horizontal zoom magnification independently, and a setting screen at that time is displayed on the display section 319.

The key 321 is a key and an LED used when copying a two-page spread document onto separate sheets of paper.

The key 325 is a key and LED for moving the document to the right or left, creating a binding margin, and copying.A setting screen is displayed on the display unit 319. The key 328 is an image create key, which is a key and LED for setting an image create mode such as negative/positive inversion, mirror image, etc., and a setting screen is displayed on the display section 319.

Keys 320 are keys and LEDs for adjusting color balance (magenta, cyan, black, yellow), and a setting screen is displayed on the display unit 319. Key 324 is a color mode selection key for selecting a color that can be selected using keys other than key 315, and its setting screen is displayed on display unit 319.

The upper right key 330 of the operating section is a key and LED for entering the film projector mode.

FIG. 4 is a block diagram of signal processing inside the scanner. 1
001 is B (blue) CCD, 1002 is G (green) CCD, 1003 is R (red) CCD, 100
4 to 1006 are input color CD signal amplifiers, 100
7-1009 are analog/digital converters, 1010-
A buffer memory 1012 is used to transfer the A/D converted color digital signal to the microprocessor 1015, and stores one line of image data in the main scanning direction. Reference numeral 1013 denotes a color signal processing circuit that performs processing such as masking calculations and gamma conversion to convert input color signals into signals to be output to the printer. A stepping motor 1014 drives the projection lens 1018 to control the focus. 1015 is a microprocessor, which calculates the sampling parameter S for automatic focus control, controls the lamp light amount power supply 1016, and controls the stepping motor 1014.
Drive etc. 1016 is a power source that controls the amount of light from the lamp; 1017 is a color printer; 1018 is a projection lens that controls the focal length; and 1019 is a limit switch that provides a reference point when rotating the projection lens. 1 (1
20 is a D/A converter, and microprocessor 1
015, and controls the output/voltage of the lamp power supply 1016.

FIG. 5 is a sectional view of the film reading system.

501 is the reader main body, 502 is a lamp 514.
A projector unit with a built-in condensing lens 515, etc., 503 a carrier for setting a film, 504
505 is a document glass, 506 is a reflecting mirror, and 507 is a Fresnel lens for forming a film image on a reading unit inside the scanner.

A film image projected from the projector unit 502 is reflected by a reflection mirror 506, and a Fresnel lens 507
The light is focused on a mirror 508. The images reflected by the mirrors 508 to 510 are sent to the CCD sensor 512 by the imaging lens 511.
is imaged. The CCD 512 has R and G signals shown in FIG.
, B is a 3-line parallel color sensor consisting of three CCD line sensors with color separation films. A scanner motor 513 drives mirrors 508 to 510 to move the document reading position in the sub-scanning direction.

Next, based on the flowchart of FIG. 7, the procedure of the AP in the present invention will be explained. First stepper motor 5
13, the reflecting mirror 508 is replaced by a Fresnel lens 507.
(sp701). Next, the stepping motor 1014 controls the projection lens 1018 to the rear limit where the limit switch 1019 turns "ON" (sp702). Next, turn on the lamp 514, set it on the carrier 503, and irradiate a certain film (sp7
03).

In step 5p704, sampling data (AF data S value) for automatic focus control is calculated. AF data is a parameter that reflects the sharpness of the target image, and in this example, the sum of squares of the signal differences of adjacent pixels S fs = Σ (x (i) - x (
i-1))2 as G (green) signal x (n) (n=
0=-N). In this embodiment, the input color sensor 512 uses a 3-line parallel sensor as shown in FIG. Lens 51 shown in FIG.
1, the light is focused on the CCD 512, and the lens 511 focuses the light on the middle sensor (of the three sensors arranged in parallel).
In this embodiment, control is performed to focus on the G signal. Therefore, the G signal has the highest spatial resolution and is most suitable as a parameter that reflects the sharpness of the target image. The number of pixels in the main scanning direction on the sensor corresponding to the Fresnel projection plane is approximately 3000 pixels, and the central 1000 pixels in the main scanning direction of the Fresnel projection plane are targeted for calculation.

This AP data sampling is applied to the stepping motor 10.
14 every time the projection lens is advanced by one pulse,
The process is repeated until the front limit is located at a predetermined distance from the rear limit (sp704-706).

Thereafter, the lamp 514 is turned off (sp707), and the projection lens 1018 is controlled to the position where the S value is the thickest (Pk in FIG. 8, S=S, . . .) (sp708).

FIG. 9 shows the RAM in the microprocessor 1015.
It is a part of the computer and is read/written when using a film projector. In other words, 901 is the type of film (0: negative, 1: positive, 2: OHP paper)
, 902 indicates the presence or absence of shading data (described later).
903 is the position where the film is set (0: carrier, 1: original platen), 904 is the copy mode when using the auto carrier (0: 1), which will be described later. frame, l two consecutive frames, 2: all frames)
, 905 is a color tone correction value (0 to 4) described later, 906
depends on the focus adjustment method (0: AF, l: manual)
Store. 907 is the auto carrier connection status (0:
None, 1: Yes) is stored and is lit by a switch (not shown) when it is installed or removed. 9
08 is a lamp continuous lighting time counter.

Next, based on the flowcharts in Figures 1O and 11,
A control procedure for copying a light-transmissive original in this embodiment will be explained.

First, by pressing the key 330, the film projector mode is entered, and a screen of Pρ-1 is displayed on the display section 319 (splool). Here key 307-・
When you press β, the numbers on the screen will change from 1-3 → 2 → 1 →...
is selected and the key 307-r is pressed, 1-2-3
→1→... is selected. In this embodiment, what is selected is displayed by inverting the display of the number part ("1" for Pβ to 1 in the figure).

When the operator instructs the film to be copied in this way and presses the key 307-ok, displays Pβ-2, P showing shading procedures depending on the type of film are displayed.
A-3 (Negative film is OK after setting the base film.
key operation, OK key operation without setting film for positive film) is displayed (sp1002゜5p1003.
5p1004).

The operator follows the instructions on the display, then presses the OK key (key 3).
07-Ok), the shading operation is performed in this device, and a display indicating that the Pβ-4 shading operation is in progress is displayed on the display unit 319 (sp100).
5). However, if the shading data in the previous copy control is valid this time as well, 5p1003.5p10
In 04, Pff-2,1! PI2- instead of -3
6. A key with a mark 307-d on the upper right corner like Pρ-7 is displayed (Sp1006, 5plOc1
7) At this time, if you press the key 307-d, 5p100
5 is skipped.

Next, in 5plo011, it is determined whether the type of film specified in 5p1001 is OHP paper. O
If it is HP paper, move to 5plo19, otherwise move to 5p1009. In 5plo09, the operator selects the position to set the film using the keys 307-β and r, and presses the key 307-ok to instruct the position. After this, if the setting position is a carrier and the carrier is not an auto carrier, 5plo16.5p1017.5plo1 depending on the type of film and the setting position.
8 or 5p1019 (splolo
~1013).

On the other hand, if the film is set in the carrier and the carrier is an auto carrier, the procedure moves to 5plo14, where the operator sets the copy mode by pressing key 307β,
Indicate by r, ok. In addition, copy mode "1"
"Frame" automatically selects only the film at the position where the tray is set, "Continuous frame" automatically selects the film from the set position to the front of the empty slot, and "All frames" automatically selects the film from all slots in succession. means to copy.

When copy mode is instructed, 5p depending on the copy mode.
1020 or 5p1021.

5p1016 to 5p1021 are steps for specifying color tone correction or focus adjustment mode, respectively.

"Color correction" is to correct the shift in color tone when shooting with negative film, and "focus adjustment" is to determine whether the focus is controlled automatically or manually when film is set in the carrier 503. It is to be specified.

The operating method for specifying the above two modes is especially 5pl.
Regarding oI6, first select "l" with the key 307-u, correct the color tone by moving the color tone index with the keys 307-β and r, select "2" with the key 307-d, Key 307-42. r specifies whether the focus adjustment is automatic or manual.

In addition, in 5p1016 to 5p1021, key 30
When 4 is pressed, film image reading control starts in this device (Fig. 11 spHo1). However,
At this time, the position where the film is set is checked, and if it is set in the carrier, AP is required, so AF is performed, and if it is not set in the carrier, AP is not required, so pass 5p1103 (spH02°sp
H03).

Next, if you want to copy the film set in the auto carrier, feed the film in the slot where the tray is set into the projector body (sp1104, 5
p1105), set the data for counting 60 seconds in the counter 908, and start counting) L (
splloB), transition to well-known read control (spH07). Also, if you do not use auto carrier, SP
Bus H05 and spH06. In addition, when using auto carrier and continuous frame or all frame mode, 5p1
105,5p1106. SPH07 is turned on until the mode ends (sPH081°).If the counter 908 ends (terminates) (Fig. 12, p1201), the lamp is turned off (sPH081°).
p1202).

[Example 2] Embodiment 2 will be explained based on FIGS. 13 and 14.

Figure 13 shows part of the RAM contents in this device,
It is read/written when using a film projector. Note that the same content as in the previous embodiment is given the same reference numeral.

1301 is for saving 3□8 from the previous AF.

FIG. 14 is a flowchart showing the control for reading a light-transmissive original in this apparatus, and the control procedure will be explained based on this.

First, AF sub-control is performed (sp1401), and if Swam is different from the previous one, the counter 908 is restarted (sp1402.5p1403), a reading operation is performed (sp1404), and the above is repeated until the mode ends (sp1405).

[Embodiment 3] In Embodiment 2, film replacement was detected by the change in the value reflecting the image content, that is, S, □, but the average density of a predetermined range of the image may be used as the value reflecting the image content.

Alternatively, film replacement may be detected based on density distribution, chromaticity distribution, or pattern unmatching.

【Effect of the invention〕

As explained above, by detecting the replacement of the film and restarting the lamp lighting time limit counter, there is an effect that the time for irradiating the document can be guaranteed. Further, when performing control for a given film, the termination time of the limit counter can be easily taken into consideration, and control is facilitated.

[Brief explanation of the drawing]

Fig. 1 is an external view of the device according to the embodiment of the present invention, Fig. 2 is a diagram of three types of carriers used in the embodiment, Fig. 3 is a diagram of the operating section of the device of the embodiment, and Fig. 4 is an image. A block diagram of the signal processing; Fig. 5 is a sectional view of the film reading system of the device of the embodiment; Fig. 6 is a diagram of the 3-line color sensor used in the device of the embodiment; Fig. 7 is a diagram of the device of the embodiment. A flowchart showing the AF control procedure to be performed, FIG. 8 is a diagram showing the distribution of AP sampling data depending on the position of the projection lens, FIG. 9 is a diagram showing part of the RAM contents of the device of the embodiment, FIG. 10 (1), (21+φM is a flowchart showing the control procedure for copying a light-transmitting original in the embodiment, FIG. 11 is a flowchart showing the control procedure for copying a light-transmitting original in the embodiment, Figure 13 is a flowchart showing lamp control by a counter that counts lamp lighting time, Figure 13 is a diagram showing part of the RAM contents of the device of Embodiment 2, and Figure 14 is for copying light-transmitting originals in Embodiment 2. 102... Film projector, 105... Fresnel lens section, 1018... Projection lens, 1015... Microprocessor. Fig. 1 Fig. 8 Fig. 11 Fig. Figure 12 District 13

Claims (1)

[Scope of Claims] 1) An irradiating means for irradiating a light-transmitting original, a counter for counting the continuous irradiation time of the light-transmitting original by the irradiating means, and a start of irradiation of a predetermined light-transmitting original by the irradiating means. The invention is characterized by comprising a detection means for detecting, a start means for starting the counter based on the detection timing of the detection means, and a stop means for stopping the irradiation by the irradiation means when the counter finishes counting. Light transmission original reading device. 2) The optically transparent original reading device according to claim 1, wherein the detection by the detection means is based on the fact that the feeding of the optically transparent original into the optical path is controlled. 4) In claim 3, the value reflecting the content of the projected image is (a) the maximum value of the values reflecting the sharpness of the projected image, (b)
(c) a pattern of the contents of the projected image; (d) a density distribution of the projected image; (e) a chromaticity distribution of the projected image; any of the above (a) to (e); or A light-transmissive original reading device characterized by being a combination.