JPH0324858A - Business desk and unmagnification sensor and image reader incorporated in this desk - Google Patents

Abstract

PURPOSE:To build a picture input device in a business desk without damaging the function of a conventional business desk by providing a top plate which has the transparent upper face and the hollow inside and moving an unmagnification sensor in this top plate. CONSTITUTION:A scanner unit 1 using the unmagnification sensor is rotated with one fulcrum 4 as the center. The scanner unit 1 is not rotated but may be moved in parallel. When it is rotated, the mechanism of a unit driving system is simpler and the reliability is higher. The scanner unit 1 is moved in the hollow part of the top plate 3 in this manner. Thus, an image reader is built in a business desk 2 without having an influence of the other parts of the desk 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an office desk, a life-size sensor built therein, and an image reading device.

As a prior art related to the present invention, there is Japanese Utility Model Application Publication No. 85229/1983. The invention described in Japanese Utility Model Publication No. 62-85229 is a workpiece that allows electronic equipment such as computer terminal equipment to be moved on a desk and allows two or more people to share the terminal equipment. This relates to desks, tables, desks, etc. for stations. In this way, office desks with built-in displays, keyboards, CPUs, etc. are known, and some are of the type that can be pulled out for use, while others are built-in in a drawer space. However, it has the disadvantage that it is complicated to take in and take out equipment, and the storage space for stationery, documents, files, etc. is small.

In addition, office automation is currently progressing, and copiers, facsimile machines, work stations, etc. are now being used in large numbers.
In addition, these devices are becoming more widespread, with each person having one device at a time. However, office space is limited, and placing these OA devices on each person's desk will make the desk space smaller and have a negative impact on office work. Therefore, in recent years, OAs have been introduced that are stored in the desk when not in use, and pulled out when in use.
An office desk with built-in equipment is being proposed. However, these only provide a part to store the conventional OA equipment inside the desk, which greatly reduces the number of drawers, etc. on the desk, which significantly reduces its function as a desk. It is.

FIGS. 7(a) and 7(b) show a conventional contact optical system (.
) and the reduction optical system (b). In the figure, 20 is a close-contact image sensor, and 21 is a close-contact sensor lens array (1
22 is a document, 23 is a CCD image sensor (LSI sensor), and 24 is a reduction lens. As a photoelectric conversion element for image input devices. A reduction optical system that inputs an image is often used in COD, etc., but since it requires a lens and a plurality of mirrors, the volume of the optical system becomes too large, making it unsuitable.

To solve this problem, a 1x sensor is required, but using a conventional 1x sensor as is has many drawbacks.

FIGS. 8(a) and 8(b) show a photoelectric conversion element array, in which numeral 25 is a photoelectric conversion element and 26 is a photoelectric conversion element array.

In this case, when the sensor is rotated around one point, the same image information will be read many times on the side closer to the center, which is undesirable. Note that only the photoelectric conversion element is schematically shown in FIG. 8(b).

Moreover, the present invention can be used for image input devices (for copying, facsimile, computer input, optical disk memory, etc.), which are the most important units of office OA equipment, without impairing the functions of conventional office desks. The present invention proposes to incorporate the device into an office desk (which has a wide range of applications such as business), and is also a means to increase the degree of freedom in the design of the office desk, simplify the structure of the image input device, and improve reliability. The primary purpose is to provide the following.

Furthermore, as photoelectric conversion elements for image input devices, devices that input images using reduction optical systems such as COD are often used, but in order to achieve the above purpose, lenses and multiple mirrors are required. The volume of the system becomes too large and is inappropriate. To solve this problem, a 1x sensor is required, but using a conventional 1x sensor as is has many drawbacks. When the sensor is rotated around the work point, the same image information will be read over and over again near the center, which is undesirable. Therefore, the present invention proposes a new sensor structure to solve the above-mentioned drawbacks.

Furthermore, when image information is read by rotating the same-size sensor around one point as described above, the image information read by each pixel becomes information on an arc on the document.

However, in a printer, for example, the writing element is formed on a line, and if the information read in order to scan this in one direction is directly input into the printer, it will not be possible to obtain an image exactly as in the M manuscript. The present invention
The purpose of this is to provide a means for converting this information into 1:t line information.

In order to achieve the above object, the present invention has a structure in which the top plate has a transparent upper surface and is hollow inside, and a 1-magnification sensor moves within the top plate. An office desk having (2
) an office desk with a structure in which a 1-size sensor rotates around an arbitrary point; (3) an office desk that uses a 1-size sensor; In a 1-magnification sensor that reads data through a dedicated image forming element, the width of the photoelectric conversion element array of the 1-magnification sensor in the sub-scanning direction changes sequentially from one end of the photoelectric conversion element array to the other end. (5) When the width of one end of the photoelectric conversion element in the sub-scanning direction is a, the width of the other end is b (however, a>b), and the length of the photoelectric conversion element array is α, Width Y in the sub-scanning direction of the photoelectric conversion element at a distance of X from the width b in the sub-scanning direction
is 7=112-"-'x + b α, or (
6) In an image reading device that obtains image information by rotating a 1-size sensor around one point, the image information read by the 1-size sensor while rotating is set at one vertex of the document as the origin, and the vertex is shaped or The image reading device is characterized by having a processing function for converting into X, Y coordinates, with one side of the two sides being the X axis and the direction perpendicular to this being the Y axis. The following is a description based on embodiments of the present invention.

FIG. 1 is a schematic diagram for explaining an embodiment of an image reading device using the top plate of an office desk according to the present invention. desk, 3
is the top plate, and 4 is the fulcrum (rotation center). A scanner unit 1 using a same-magnification sensor is configured to rotate around one fulcrum 4. Of course the scanner unit
may be translated instead of rotating. However, it can be said that the rotary type has a simpler unit drive system that drives the unit and is more reliable. The following explanation will be limited to the rotary type. If the scanner unit 1 is moved in the hollow space within the top plate 3 in this way, the image reading device can be incorporated without affecting other parts of the office desk 2.

FIG. 2 is a diagram showing an example in which at least a part of the top plate is transparent, and the entire surface of the top plate 3 may be formed of a transparent member 5 such as glass or acrylic plate, or the portion on which the original is placed. Only the transparent layer may be transparent. In addition, the photoelectric conversion element must be at least long enough to read from the center of rotation 4 and from the farthest points a and b of the maximum document size to the nearest point C, and the distance from the center of rotation 4 to the farthest point is Flood...The length of Q1 Qz is required, where Q2 is the distance to the nearest point.

Further, when the scanner unit 1 is rotated at a constant angular velocity about the rotation center, the distance traveled by the farthest part and the nearest part of the scanner unit 1 is greatly different, and this distance is proportional to the distance from the rotation center 4.

That is, if the scanner unit 1 rotates at an angle of ω per unit time, at the farthest point (distance) from the rotation center 4, the moving distance at that point is Qlω, and at the nearest point, it is Q2ω. This means that if the output of the same-magnification sensor is read out sequentially over a fixed period of time, the reading density will be different between areas far from and near the center of rotation of the original. Therefore, in order to make this as inconspicuous as possible, Q1≦2Qz
is preferred.

Figure 3(a). (b) is a diagram showing the configuration of a 1x sensor, which is cumbersome for an image input device that reads an image by rotating the 1x sensor around a single point as described above. FIG. 3(a) shows one form of the same-size sensor board 6. Normally, a 1x sensor consists of a photoelectric conversion element and a single circuit that sequentially activates it. The operation circuit integrates 1W film transistors (TPT) and is formed on the same substrate as the sensor, or an LSI chip is mounted on the same substrate, or it is mounted on a separate printed circuit board and is mounted on a glass substrate. A method of connecting a sensor on a substrate, for example, by wire bonding, etc., has been proposed, and either method may be used in the present invention.

FIG. 3(b) shows an enlarged view of a photoelectric conversion element array according to the present invention. This has a structure in which the width of the photoelectric conversion element in the sub-scanning direction is sequentially changed in order to improve the problem described in FIG. 8(b). The width in the sub-scanning direction is related to the relative movement distance between the same-size sensor and the document within the scanning time of one line of the photoelectric conversion element array of the same-size sensor, and in principle, the width is the part read during the previous e-line scan. It is preferable not to read the data redundantly during the next scan.

Therefore, when using the same-size sensor as in the present invention, where the same-size sensor is rotated about one center, when the same-size sensor is rotated at a constant angular velocity ω, the parts near and far from the center will differ. The distance traveled varies in proportion to the distance from the center of rotation. Therefore, it is preferable that the width in the sub-scanning direction is wide on the side farther from the rotation center and narrower on the inner side. Furthermore, as mentioned above, the moving distance is proportional to the distance from the center of rotation.

In Figure 4, from point B to point A is the effective reading dJ (i.e. the length of the photoelectric conversion element array) of the equal-magnification sensor, and if point C is the rotation center of the equal-magnification sensor, then the innermost point of the equal-magnification sensor B
The moving distance of a point is Lω, and the moving distance of the farthest point is (L+
Q) ω. Further, the moving distance at a point between point B and point A (point at distance X from point B) is (L + X)ω. Now, if the width in the sub-scanning direction at point B is b, then in order to rotate at the angular velocity ω, the sub-scanning direction a at point A is a=b+ω.The width C in the sub-scanning direction of any point X is c. It is preferable that =bxω. Conversely, r in the sub-scanning direction at point B
lJb. When the width in the sub-scanning direction at point A is a, the width C in the sub-scanning direction at any point between AB is expressed by What is the angular velocity ω when using a same-size sensor? It is preferable that ω=■L.

FIG. 5 is a diagram showing an example of reading image information by rotating the same-size sensor. Focusing on one photoelectric conversion element of the same-size sensor, it reads image information while moving in an arc rather than parallel to the sides of the document.

However, if the information of each photoelectric conversion element is output as is, many problems will occur. To solve this problem, the origin is one vertex of the document, one side is the X axis, the other side is the Y axis (or the direction perpendicular to the X axis is the Y axis), and the signals read are , Y coordinate image information. This conversion is mathematically easy to convert to the X, Y position B'''A if you know the position of the rotation center, the origin of the X and Y coordinate axes, the rotation speed of the sensor, and the distance from the rotation center of each element. For example, when a pixel located at a distance r from the center of rotation forms an angle θ with a line connecting the center of rotation and the origin as shown in the figure, the X and Y coordinates are: X = X. - rcos (0+φ)Y = Y
It can be expressed as O+rsin(θ+φ). (However, φ is the angle formed by the appropriate line connecting the origin of the X, Y coordinates and the center of rotation and the X axis.) Let us now assume that the time when the sensor passes the origin is zero, and the value of 0 after this t seconds. can be expressed as θ=ωt, where ω is the angle of the sensor. In addition, r is the distance from the center of rotation to the nearest photoelectric conversion element, and from this element n
The distance to the bit-th element is nd (however, d is the distance between the centers of each element, for example, 12 for an 8 dot/mm sensor)
Therefore, r = L + n d . Also, n can be determined if the time is known. That is, if the scanning interval of the line of the equal-size sensor is f, then at time t, the equal-size sensor becomes t f = K less than M, and the K+1st scan is performed, and the "M' bit Pth signal is output. (where P is the read time per bit).

In the above, it was assumed that no time is required other than the readout time per line, but normally time is required for signal processing and setting, but the same can be considered in this case.

As described above, if time L is known, it can be uniquely converted into X and Y coordinates.

Figure 6 is a diagram showing the shape of the equal-magnification sensor scanner unit 1~, in which 7 is the support substrate, 8 is the equal-magnification sensor, and 9 is the SL.
A (Selfo Cleanse Array).

This is a 1-size sensor having a resolution in the main scanning direction of 8 dat/mm on a support substrate 7 (a photoelectric conversion section made of a-Si and a T F T made of Poly-Si on a glass substrate).
This is an integrated form of a moving circuit) glued together. Furthermore, on top of this is SLA (Selfo Cleanse Array) 9
was installed to form the scanner Unisoto.

These are fixed in the housing along with a light source consisting of an LED array (not shown).

The rl+ of the photoelectric conversion element in the sub-scanning direction was set to 65 μm at the right end of the equal-magnification sensor in the figure and 195 μm at the left end (however, the effective reading width of the equal-magnification sensor is 242 rom).

The length of the support substrate 7 was 370 m rn, and the equal-magnification sensor 8 was formed on the left side of a portion 121 mm from the right end of the support substrate 7. Also, the width of each element in the sub-scanning direction is (650.54X) for the element at a distance of X mm from the right end.
It was set to μm.

An office desk equipped with the scanner unit described in Example 1 above was prepared. This has the shape shown in Figure l,
The thickness of the top plate is 50 rn m. A part of the top plate is made of glass, and the size of this part is A4 size (210 mm x 2
97mm). The same magnification sensor shown in the above embodiment was installed inside this top plate so that it would rotate around point C in Figure 6. In addition, a step motor is used for rotation, and the rotation time is 5ms.
It was adjusted to rotate by 0.031 degrees during ec. As a result, good image information was obtained when the image was read.

Shishiku 1 The scanner unit is configured under the conditions shown in Example 2 above,
The origin of the X and Y coordinates obtained by converting the image information obtained by rotation into X coordinate information as shown in equation (1) below was set as the origin shown in FIG. (φ=54.5°) Here, the center of rotation of the scanner unit I (XO, yo) is (14 8, 5,
-1 2 1) mm. Also, in equation (1), r=121+o. l25n O=ωt (c.+=6.1 degrees/see) Let the scanner pass the origin at the time O, and the output of each pixel is X, Y!
After converting it into a target and storing it in memory, a thermal head printer was used to form an image, and a good image was obtained that well reproduced the original.

As is clear from the above description, the present invention allows the image input device, which is the most important unit of office OA equipment, to be used for office use without impairing the functions of conventional office desks. By incorporating it into a desk, it is possible to increase the degree of freedom in designing the office desk and simplify the structure of the image input device. Furthermore, it is possible to configure a life-size sensor in which when the life-size sensor is rotated around one point, the same image information is not read repeatedly on the side closer to the center.

Furthermore, when image information is read by rotating the same-size sensor around a single point, the image information read for each pixel becomes information on an arc on the document, but it is possible to convert this to line information. .

[Brief explanation of drawings]

FIG. 1 is a configuration diagram for explaining an embodiment of an image reading device using the top plate of an office desk according to the present invention, and FIG. 2 shows an example in which at least a part of the top plate is made transparent. Figure, 3rd
Figure 4 shows the structure of the same-size sensor, Figure 4 shows the case where the same-size sensor is rotated about two centers, and Figure 5 shows the structure of the same-size sensor.
The figure shows an example of reading image information by rotating the same-magnification sensor, Fig. 6 shows the shape of a 1x sensor scanner unit, and Fig. 7 shows the conventional example of Miwaka Optical. Diagram showing the system and reduction optical system. FIG. 8 is a diagram showing a photoelectric conversion element array. 1...Same-size sensor scanner unit, 2...Office desk, 3...Top plate. 4...Fully point (rotation center). Figure 1 Figure 3 ((7,) b) Figure 4 Figure 5 Figure 8 Figure 92-6 Figure CQ) tb冫Figure 7 Ca) (b> 23

Claims (1)

[Scope of Claims] 1. An office desk characterized by having a top plate having a transparent upper surface and a hollow interior, and having a structure in which an equal-magnification sensor moves within the top plate. 2. In a 1x sensor that reads the image information of a document in close contact with the original or via a 1x imaging element, the width of the photoelectric conversion element array of the 1x sensor in the sub-scanning direction is from one end of the photoelectric conversion element array. A life-sized sensor characterized by a gradual change toward the other end. 3. In an image reading device that obtains image information by rotating a 1-size sensor around a single point, the image information read by the 1-size sensor while rotating is set at one vertex of the document as the origin, and the vertex is formed. An image reading device characterized by having a processing function of converting into image information of X and Y coordinates, with one of the two sides being the X axis and a direction perpendicular to this being the Y axis.