JPH02120842A - Image processing device - Google Patents

Abstract

PURPOSE:To miniaturize a processor and to obtain a projected picture covering a range as large as possible by setting the size of a reflection-type light condensing plate on which a projected original is placed less than an original setting part, varying an image forming magnification in a main-scan direction and in a sub-scan direction and thereby obtaining a projected original. CONSTITUTION:The title picture processor has the reflection-type light condensing plate 5 with a stage smaller than an original 25 and processing function to vary an image forming magnification in the direction in which a picture inputted from an input part 3 is mainly scanned and the direction in which a picture inputted from the input part 3 is sub-scanned. When the image forming function is utilized, the original 25 to be copied is placed on a transparent plate 24, and a copying magnification is specified to unmagnification in the main scan direction and to reduction in the sub-scan direction, etc., thereby starting a copying operation. When the picture processor is used as an OHP, and original platen 2 is moved from the reflection-type light condensing plate 5, on which the projected original reduced in the sub-scan direction is placed. The original is projected on a screen through a reflecting mirror 32. Consequently, the entire processor 1 can be miniaturized, and in addition a picture covering a range as large as possible can be projected.

Description

[Detailed description of the invention] [Industrial application field]

The present invention has a function of projecting a projection original onto a screen like an overhead projector, and a function of forming an image of the original on paper or a transparent sheet like a copying machine. The present invention relates to an image processing device that enables this.

[Conventional technology]

There are two known types of conventional overhead projectors (hereinafter referred to as OT (P)): a transmission type and a reflection type. The image of the projection original is projected onto a screen through a projection lens and a reflection mirror placed above the upper surface of the original document mounting table. The placed projection original is illuminated from above, and the reflected image of the projection original is projected onto a screen through a projection lens and a reflection mirror placed above a Fresnel lens. Apart from simple manuscripts in which figures, characters, etc. can be handwritten directly onto a transparent sheet using a coloring pencil, etc., documents that need to be printed directly on a transparent sheet using an electrophotographic copying machine, etc. It is created by copying the image. Therefore, when teaching or explaining using OHP at schools, various explanation venues, conference rooms, etc., it is necessary to create a projection manuscript in advance. Even if you suddenly want to project something that has not been prepared as a projection manuscript in the middle of a meeting or conference, you will not be able to create the projection manuscript unless there is a copy machine nearby, and you will not be able to project it. It has both the functions of a copying machine and
An image processing apparatus has been proposed in which a projection original used for HP can be obtained by copying using the above-mentioned copying machine. In such a device, the document table on the main body of the device moves during copying, and when projecting, the document table moves from above the light condensing plate installed on the top of the device main body, and the built-in projection unit is set on the top of the light condensing plate. There is one in which a light condensing plate is illuminated by an illumination lamp, and the reflected light is made to enter a projection section.

[Problems to be solved by the invention]

In such an image processing apparatus with OHP, the projection original is created by copying onto an OHP sheet at the same size as the original, so the setting surface of the reflective light condensing plate on which the projection original is set is also the same as the projection original. The same size was required, and the device itself could not be made smaller. Also, when copying, use the reduction function to reduce the size of the original.
Even if you try to downsize by obtaining a HP sheet,
The image is reduced by the same ratio in both the main and sub-scanning directions, and the OHP
The width of the sheet (in the main scanning direction) is smaller than the set surface of the reflective light condensing plate, resulting in a blank space on the screen. Furthermore, since it is a reduced image, it has the disadvantage that it is much harder to see than an image at full size. SUMMARY OF THE INVENTION Therefore, the present invention aims to provide an image processing device that can make the entire device compact and can project an image as wide as possible in an easy-to-see manner.

[Means to solve the problem]

In other words, the image processing apparatus of the present invention includes an input section for inputting an image of a document, an image processing section for processing a signal from the input section, and an image processing section for converting the document image into a sheet according to the signal processed by the image processing section. In an image processing apparatus comprising an image forming section capable of forming an image, and a reflective light condensing plate having a stage smaller than the projection original on which the sheet on which the image has been formed is placed as a projection original, the image processing section The present invention is characterized in that it includes a processing function that makes the image formation magnification different in the main scanning direction and the sub-scanning direction of the image input from the input section. Further, the image processing section is characterized in that it reduces the size of the image input from the input section in the sub-scanning direction with respect to the main scanning direction.

【Example】

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an image processing apparatus of the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 1 to 7, the main body 1 of the apparatus has an image forming function that allows projection originals to be created by copying or the like. The apparatus includes an image input section for inputting an image, for example, a reading section 3 provided on the upper surface of the apparatus main body 1 and for scanning a document on a document table 2. Reference numeral 4 denotes a mechanism for forming an image, such as a printing mechanism, built into the main body l of the apparatus. Further, the device main body 1 is provided with a reflection type light condensing plate 5 arranged in parallel with the reading section 3 on its upper surface, and a projection section 6 attached to the side surface of the device main body 1 and supported on the top of the light condensing plate 5. ing. The image forming function, for example, the copying function, of the apparatus main body 1 includes a document table 2 movably mounted on the upper part of the apparatus main body 1, a reading section 3 installed on the upper surface of the apparatus main body 1 to scan the original, and a built-in document table 2 installed in the apparatus main body 1. This is achieved by the printing mechanism 4. The printing mechanism 4 includes a printing means, an automatic roll paper supply means stored in the apparatus main body 1, and a manual paper feeding means.
It is equipped with a paper ejection means. That is, Figures 3 and 4
As shown in the figure, the platen 12 driven by the motor 11 includes
A printing means, for example, a print head 13, a paper feed roller 14 in close contact with the lower part thereof, and a paper ejection roller 15 in close contact with the upper part thereof are attached. Paper guides 16 and 17 are provided above and below the paper feed port A, and the platen ] 2
A paper guide 18 for reversing the paper is provided around the paper guide 18, and a paper guide 19 is provided at the paper discharge port B facing the paper guide 16. The paper feed port A and the paper discharge port B are closed when not in use by a member such as a paper feed tray 21 which is formed at the top and bottom of the same side end of the apparatus main body 1 and is rotatably mounted around a shaft 91. When in use, the paper feed tray 21 is opened by folding it down. The motor 11 that drives the platen 12 transmits drive to the platen 12 via a timing belt 101 and an intermediate gear 102 while being decelerated to a predetermined rotational speed. Note that a paper guide 23 that also serves as a tray for the roll paper 22 is provided in the main body l of the apparatus, and the paper guide 23 that also serves as a tray for the roll paper 22 is provided to guide the roll paper 22 to the platen 1.
The paper is fed to the paper ejection roller 15 via the paper 2. Sl is a paper feed switch (sensor), S2 is a roll paper detection switch, and S3 is a paper discharge switch. In addition, a document table 2 is movably mounted on the top of the main body 1 of the apparatus.
is a transparent plate 24 made of glass or the like that supports the original 25.
The transparent plate 24 has one end attached to a support shaft (
(not shown), and is mounted so that it can be opened and closed from the other end side or up and down around this support shaft.
6 and is driven by a motor 90 from the light condensing plate 5 side to the reading section 3 side. A document table 2 is provided on the top surface of the apparatus main body 1.
The reading section 3 that scans the upper document is composed of a contact image sensor 132 and the like. This reading section 3 is provided with a copy end switch S4. Therefore, if a reduced projection original is obtained using a normal reduction function and then projected, the procedure is as follows. Reading section 3
When the document table 2 starts reading, the document table 2 moves at a constant speed, and the document illuminated by the light source 131 through the transparent plate 24 is scanned by the contact image sensor 132 at regular intervals.
As a result, the light is focused through the condenser lens array 133 and read at regular intervals in the sub-scanning direction. The read data for each line is digitally processed and binarized by a control bag @134 having an image processing section for each bit in the main scanning direction. To explain this binarization process specifically, as shown in FIG. 9(A), the image sensor 132 has photoelectric conversion elements arranged in a line, and when irradiated with light, each element is charged. is accumulated. The amount of this charge corresponds to an increase or decrease in light. Light data from the image sensor 132 is processed by a binarization processing circuit 251 and input to the thermal head 13 from a data input section. Further, a timing pulse generation circuit 253 outputs timing pulses to the image sensor 132, the binarization processing circuit 25, and the output gate circuit 255. Note that the timing pulse is output to the output gate circuit 255 by dividing one part directly and the other part through the quaternary counter 257, and outputting the timing pulse to the output gate circuit 255.
The pulses selected in step 5 are input to the thermal head 13 from the write clock input section. That is, as shown in FIG. 9(B), the image sensor 1
32 is 1=1 with the timing of the sensor clock generated by the timing pulse generation circuit 253, and a voltage proportional to the charge accumulated in this internal element is generated as an output. Next, as shown in FIG. 9(C), the timing pulse generation circuit 253
It can be digitized by determining 1 or 0 depending on whether the output is above or below the slice level at the pulse position. The binarization processing circuit 251 controls this. If the data is sent to the thermal head 13 and copied as it is, a same size copy can be made, but the reduced copy may be enlarged and projected as follows. For example, if binarization is stopped once every four bits, the bits in one line will be thinned out once every four times, resulting in a line whose length is 3/4. By adding 1/4 blank space to one line and transferring it to the thermal head 13 for printing, an image that is 3/4 the size in the main scanning direction is obtained. That is, the timing pulse generation circuit 253
The timing pulse output from the quaternary counter 257
When counted, a pulse can be generated at the fourth time as shown in Figure 9 (CD). If the output gate circuit 255 is used to output a timing pulse when the output of the quaternary counter 257 is 0 and stop the output when the output is 1, the 9th
Obtain the timing clock shown in Figure (E). The thermal head 13 considers the data in the data input part supplied from the binarization processing circuit 251 to be valid and takes it into it only when a pulse enters the write clock input part.
The X section in figure (F) is ignored. As a result, the data stored in the thermal head 13 is
0 or more as shown in figure (G) is 3/4 in the main scanning direction
This is a method to double the amount of data. Regarding the sub-scanning direction, this is achieved by setting the reading feed speed to 4/3 times the feed speed of the paper fed by the platen 12. When printing in the above manner, the original is copied to 3/4 size in the main scanning direction and/or sub-scanning direction on transparent OHP paper, and this copy is placed on the light condensing plate 5 and enlarged. Can be projected. The projection function of the projection unit 6 is such that a projection lens, which will be described later, can focus even if the distance between the screen and the main body 1 changes, so it is sufficient to perform enlarged projection according to the purpose. However, when printing by the thermal head 13, if the main scanning direction is kept at the same magnification and the sub-scanning direction is reduced, a projection document reduced to a flat state is obtained, and when this is projected, a flat projection image is obtained. However, the resolution is good in the main scanning direction. Next, on the upper surface of the device main body l, a reflective light condensing plate 5 is arranged in parallel on this reading section 3. The reflective light condensing plate 5 usually consists of a Fresnel lens 27 and a metal vapor deposited layer formed on its back surface. The reflective layer 28 is housed and held in a cover 29 on the top surface of the main body. Furthermore, the main body top cover 29
As shown in FIG. 5, one end thereof is pivoted to the main body 1 of the apparatus so that it can be opened and closed. As shown in FIG. 4, reference numeral 85 is a light collecting plate setting switch that detects whether or not the light collecting plate 5 is securely set in the main body 1 of the apparatus. The printing mechanism 4 is built into the apparatus main body 1 below the light condensing plate 5. In this embodiment, the image forming mechanism is a printing mechanism 4 that prints using a thermal head 13, but an image forming mechanism such as an electronic copying machine or a laser printer may be used. The projection unit 6 supported on the upper part of the light condensing plate 5 is pivotally attached to the side surface of the device main body 1 via an arm 7 so as to be swingable.
When using the image forming function of the apparatus main body 1, it can be folded down and stored on the side of the apparatus main body 1. The projection unit 6 is designed so that it can be tilted to the opposite side of the main body 1, not to the side end where the paper feed port A and the paper output port B are located, so that the image forming function can be used when the projection unit 6 is stored. It has become. As shown in FIGS. 6 and 8, the projection unit 6 includes not only a projection lens 111 within the machine frame 31 but also an illumination lamp 112 made of a halogen lamp that illuminates the projection original placed on the light condensing plate 5. , a light source reflecting mirror 113 and a condensing lens 114 arranged on both sides thereof, and a cooling fan 115 are built in. The above lighting lamp 11
2 can be installed or removed by opening the lid 116 attached to the top surface of the projection unit 6. On the machine frame 31, a reflection mirror 32 for projecting a reflected image of a projection original onto a screen is pivoted at one end and can be opened and closed. Note that the reflecting mirror 32 is mounted so that it can rotate 360 degrees around the projection lens 111. Therefore, it is possible to project in any direction in all four directions. As shown in FIG. 8, the light emitted from the illumination lamp 112 is
The light reflected by the light source reflection mirror 113 is projected onto the light collecting plate 5 by the light collecting lens 114 . The Fresnel lens constituting the light condensing plate 5 is an eccentric mirror, and its dimensional center is at the same position as the center of the projection lens 111, and the optical center of the Fresnel lens, which is shifted by the amount of eccentricity, is at the illumination center. It is located in the center between the lamp 112 and the projection lens 111. Since the center of the dimensions of the Fresnel lens coincides with the center of the reflecting mirror 32, the entire image of the projection original on the Fresnel lens surface is accommodated within the projection lens 111, and the image is not cut off. S6 is a mirror storage switch that detects whether or not the reflecting mirror 32 is stored, and S7 is a main body installation switch. S8 and S9 are a projection unit set switch and a projection unit storage switch, respectively, which serve as projection unit position detection means to detect whether the projection unit 6 is in the set position or the storage position. By detecting the position of the projection section 6 in this manner, the illumination lamp 112 is always turned off when the projection section 6 is stored along the apparatus main body 1. Furthermore, copying is disabled when the projection section 6 is in a state other than the stored state or the set state, which prevents damage to the apparatus due to collision between the document table 2 and the projection section 6. That is, the illumination lamp 112 is connected to the projection unit set switch S.
8 is not turned on, it cannot be lit, and while the illumination lamp 112 is lit, this projection unit set switch S
8 is turned off, the illumination lamp 112 is immediately turned off.
goes out. As shown in FIG. 1, a rotatable handle 33 is provided on the side surface of the device main body l opposite to the projection part 6, and an operation panel 34 is also rotatably attached to the side surface of the device main body 1 inside the handle 33. ing. As shown in FIGS. 3 and 7, this operation panel 34 includes a paper selection switch B1, a magnification selection switch B2, a lamp switch B3 that turns on and off the illumination lamp 112, and a copy switch that starts copying. B4, a mode (text/photo) changeover switch B5, and a density adjustment volume ■ are provided. The paper selection switch B1 specifies whether the paper to be printed is an OI-(P projection sheet, thermal paper, etc.).The magnification selection switch B2 specifies whether the copy magnification is to be set to normal size, enlargement, or reduction. The lamp switch B3, which instructs the operation of the projection unit 6, turns on the illumination lamp 112 when pressed when the illumination lamp 112 is off, and turns on the illumination lamp 112 when pressed when the illumination lamp 112 is on. The lamp 112 is turned off.If the copy switch B4, which instructs the operation of the image forming section, is pressed while the copy operation is not in progress, copying starts;
If pressed during a copy operation, the copy operation will be stopped. Note that when the lamp switch B3 is turned on, even if the copy switch B4 is turned on, it is ignored. On the contrary, while paper is set and the copy switch B4 is turned on to make a copy, turning on the lamp switch B3 is ignored. This copy switch B4 and lamp switch B3
There is no priority order, and copying is not possible while the illumination lamp 112 is on, and it is sufficient that the illumination lamp 112 cannot be lit while copying. Note that if the paper is inserted into the paper feed slot A while the illumination lamp 112 is on, the power supply and the heat irradiated by the illumination lamp 112 are unrelated.
Paper can be fed. As shown in FIGS. 4 and 5, a coupling member consisting of a magnet 66 is attached to the upper end of the paper feed 1-ray 21 of the rotating member, and is attached to the end of the document cover 26 on the document table 2. The document cover 26 opens by attracting the attached magnet 67,
This also prevents the document table 2 from moving. Next, the operation of the image processing apparatus of the present invention will be explained. First, when using the image forming function of the device of the present invention,
Open the document cover 26 and place the copy document on the transparent plate 24 with the image surface facing the transparent plate 24,
Close the document cover 26 and use the magnification selection switch B2 provided on the operation panel 34 to specify the copy magnification to be the same size in the main scanning direction and reduce it in the sub-scanning direction.Then, by pressing the copy switch B4, the copying operation can be performed. is started. Therefore, by supplying a projection sheet for thermal color development, thermal transfer, etc. instead of thermal paper for copying to the paper feed section of the main body 1 of the apparatus, projection sheets for OHP that are instantly reduced in the sub-scanning direction from a copy original can be created. You can get the manuscript. In the case of manual paper feeding, the paper feed tray 21 is folded down, the paper is fed through the paper feed port Δ, and printing is performed between the paper feed roller 14 and the platen 12. In the case of roll paper, it is fed directly from the paper guide 23 between the platen 12 and the paper discharge roller 15 for printing. Further, when the image processing apparatus of the present invention is used as an OHP, the document table 2 is moved from above the reflective condensing plate 5 made of a Fresnel lens attached to the upper surface of the apparatus main body 1,
The projection original reduced in the sub-scanning direction is placed on the light condensing plate 5, and the lamp switch B3 provided on the operation panel 34 is pressed. Then, the illumination lamp 112 illuminates the projection original, the irradiation light hits the condenser plate 5 and is reflected, and the reflected light passes through the projection lens 111 and the reflection mirror 32 in the projection section 6 and reaches the screen, and the projection original is illuminated by the illumination lamp 112. The image is projected with no margins in the width direction.

[Effects of Example]

According to the above embodiment, a projection original is created that is the same size in the main scanning direction and reduced in the sub-scanning direction, so even if the original is rectangular (for example, A4 size used vertically), it is almost square. A projection original can be created, and instead of conventionally requiring a light collection plate 5 of the same size as the projection original, a smaller size light collection plate 5 can be used, and the apparatus can be made more compact. Furthermore, since the projection original can be made to have approximately the same size as the light condensing plate 5, the projection original can be projected onto the light condensing plate 5 without shifting, and the image can be easily viewed in the widest possible range.

[Modified example]

In the above embodiment, a projection original is created that is reduced in the sub-scanning direction, but it is also possible to create a projection original that is the same size in the sub-scanning direction and enlarged in the main scanning direction. It is possible to obtain a projection image that is enlarged in the main scanning direction without any interference, and it is possible to obtain a projection image that is very easy to see.

【Effect of the invention】

In summary, the present invention makes the size of the reflective condensing plate on which the projection original is placed smaller than the original setting part (and also makes the image forming magnification in the main scanning direction and the sub-scanning direction different by using a copying mechanism). Since a projection original is obtained, the light condensing plate can be made smaller and the apparatus can be made more compact.Also, it is possible to obtain a projection image in the widest possible range, and it is possible to provide a projection image that is very easy to see. .

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, and is an overall explanatory diagram when used as an OHP, Fig. 2 is a perspective view of each part stored in a predetermined position, and Fig. 3 is a top view showing the internal structure. Fourth
The figure is a schematic sectional view when used as an OHP, Fig. 5 is a schematic sectional view with the light condensing plate opened, Fig. 6 is a sectional view of the main part of the projection section, Fig. 7 is a switch arrangement, and Fig. 8 is a schematic sectional view when used as an OHP. The figure is a schematic diagram of the projection state of the OHP, and FIGS. 9(A) to 9(G) are explanatory diagrams of the function of forming a reduced image. l...Device main body 2...Original table 3...Reading section 4...Printing mechanism 5...Light condensing plate
6... Projection section 25... Original 2
6...Document cover 3 j...Machine frame 32
...Reflection mirror 33...Handle 34...
・Operation panel S1...Paper feed switch S2...Roll paper detection switch S3...Paper ejection switch S4...Copy end switch S5...Light condensing plate set switch S6...Mirror storage switch S7...・Body installation switch S8...Projection unit set switch S9...Projection unit storage switch Patent applicant: Japan Seimitsu Kogyo Co., Ltd. Same as above Riso Kagaku Kogyo Co., Ltd. Agent Patent attorney Hiroshi Tsuchihashi Figure (B) Figure (C) ■ Figure (D) Figure (E) Figure (F) Figure (G)

Claims (1)

[Claims] 1. An input section for inputting an image of a document, an image processing section for processing a signal from this input section, and an image processing section for converting the document image onto a sheet according to the signal processed by the image processing section. In the image processing apparatus, the image processing unit includes an image forming unit capable of forming an image, and a reflective light condensing plate having a stage smaller than the projection original on which the sheet on which the image is formed is placed as a projection original, wherein the image processing unit 1. An image processing apparatus comprising a processing function for differentiating the image formation magnification in the main scanning direction and the sub-scanning direction of an image input from the image processing section. 2. The image processing device, wherein the image processing section reduces the size of the image input from the input section in a sub-scanning direction with respect to a main scanning direction.