JP4550043B2 - Method for manufacturing coordinate input system - Google Patents

Description

The present invention relates to a method for manufacturing a coordinate input system, and more particularly, a coordinate input system that can provide a coordinate input system by obtaining a transparent sheet for coordinate input with a simplified manufacturing process, low manufacturing cost, and high yield. The present invention relates to a method for manufacturing an industrial system.

In recent years, there is a demand for a handwriting input system to a personal computer (PC), and for such demand, a pattern capable of providing coordinate information using a material that reflects infrared rays is printed on a transparent substrate. Infrared reflective pattern transparent sheets and systems for coordinate input have been proposed. For example, if this sheet is placed in front of a display connected to a PC, a sensor that irradiates infrared rays and reads the reflection pattern, and identifies the position of the sensor from pattern information, a touch panel or the like is conventionally used. The handwritten input that has been performed can be easily performed (see, for example, Patent Documents 1 and 2).
Here, it is usually necessary to print a pattern according to the size of each display. This is because handwriting input cannot be performed unless the coordinates on the display and the coordinates provided by the sheet are in one-to-one correspondence. For example, in the case of a sheet for a 15-inch monitor, the top, bottom, left, and right of the 15-inch monitor. It is necessary to print a pattern that can correspond to the above on a sheet and cut out or punch it out according to the monitor size (see FIG. 10). Further, it is necessary to match the coordinate system of the sheet with the coordinate system of the display.
JP 2003-256137 A JP 2001-243006 A

The present invention has been made to solve the above-described problems. It is an object of the present invention to provide a coordinate input system by obtaining a transparent sheet for coordinate input with a simplified manufacturing process , a low manufacturing cost, and a high yield. And

  As a result of intensive studies to achieve the above object, the present inventors have obtained the coordinate information provided by the sheet and the coordinate information on the display when the coordinate input transparent sheet is attached to the display and used. It has been found that the above-mentioned object can be achieved by performing a one-to-one correspondence correction, and the present invention has been completed.

That is, the present invention
(1) A coordinate information pattern showing the same coordinate range on a sheet on which a coordinate information pattern is formed of a liquid crystal material having a cholesteric structure which is transparent in the visible region and has infrared reflectivity on a transparent substrate transparent in the visible region And a step of forming so as to be repeated,
For each display, from the repeated coordinate information pattern of the sheet, cutting or punching so as not to exceed the pattern boundary, and forming a display arrangement sheet,
Arranging the display arrangement sheet on a display screen;
A step of causing a coordinate input sensor to read a coordinate information pattern of the display arrangement sheet located on two or more corners on the display screen to obtain sheet coordinates on the display arrangement sheet;
A method for manufacturing a coordinate input system, comprising a step of obtaining an arithmetic expression for converting sheet coordinates on the display arrangement sheet into display coordinates on the display screen based on the sheet coordinates,
(2) A coordinate information pattern showing the same coordinate range on a sheet in which a coordinate information pattern is formed of a liquid crystal material having a cholesteric structure which is transparent in the visible region and has infrared reflectivity on a transparent substrate transparent in the visible region And a step of forming so as to be repeated,
For each display, from the repeated coordinate information pattern of the sheet, cutting or punching so as not to exceed the pattern boundary, and forming a display arrangement sheet,
Arranging the display arrangement sheet on a display screen;
A coordinate information pattern of the display arrangement sheet positioned inside the side of the display screen is read by a coordinate input sensor to obtain sheet coordinates on the display arrangement sheet;
A method for manufacturing a coordinate input system, comprising a step of obtaining an arithmetic expression for converting sheet coordinates on the display arrangement sheet into display coordinates on the display screen based on the sheet coordinates,
(3) In the step of forming the display arrangement sheet, the display arrangement sheet is formed with a shape that serves as a mark so as not to make a mistake in the front, back, top, bottom, left, and right of the sheet. 2) Manufacturing method of coordinate input system according to
Is to provide.

According to the method for manufacturing a coordinate input system of the present invention, a coordinate input system can be provided by obtaining a coordinate input transparent sheet with a simplified manufacturing process, low manufacturing cost, and high yield.

As shown in FIG. 1, the coordinate input system according to the embodiment of the present invention has a coordinate information pattern 3 on the transparent substrate 2 that is transparent in the visible region and can provide coordinate information in a desired coordinate range. When the printed sheet is arranged in front of the display and used as the coordinate input transparent sheet 4 in combination with the coordinate input sensor, the coordinate information provided by the sheet 4 and the coordinate information on the display are in a one-to-one relationship. This is a coordinate input system that performs correction for matching.
According to the coordinate input system of the present embodiment , the coordinate input transparent sheet may be a coordinate input transparent sheet having a different display size to be applied, and the user has an appropriate size. After purchase, a coordinate input transparent sheet cut out or punched into any appropriate size can be used as necessary.
In particular, as shown in FIG. 1, the coordinate input transparent sheet 4 (broken line portion) is transparent in the visible region, and the coordinate information pattern 3 capable of providing coordinate information in a desired coordinate range is a transparent pattern as a repeating pattern. From the continuous printed material 1 of the coordinate input transparent sheet continuously printed on the material 2, a sheet cut or punched out as a sheet of any shape or size can be used. Significant cost reduction can be achieved when manufacturing the sheet.

In the present embodiment , the coordinate information pattern printing method is not particularly limited, and a known method can be used. For example, a flexographic printing method, a gravure printing method, an offset printing method, a stencil printing method, an ink jet printing method, and the like. In the case where a repeated pattern is continuously printed at a high speed, a printing method using a roll plate such as a gravure printing method, a flexographic printing method, and an offset printing method is preferable.
In addition, the method of cutting out as a sheet having an arbitrary shape or size is not particularly limited, and a known method can be used. For example, a cutter, scissors, or a guillotine blade may be used. A mold may be used, and when it is cut repeatedly with a fixed shape, it may be punched with a Thomson blade designed in a predetermined shape.

In this embodiment , the shape of the sheet cut out (or punched out) from the continuous printed material is usually a rectangle so as to cover the entire surface of the display, or a rectangle with R (curvature) at four corners. The shape is not particularly limited as long as the entire surface can be covered. Also, depending on the application used in the following correction methods, only a specific area of the display screen may be used as the input area. When used in such applications, the sheet is cut out to cover only a part of the display, and a sheet is installed. May be.
The cutout shape may have a tab or a hole that serves as a foothold for installation on the display in addition to the rectangular shape.
Further, the sheet may be cut out in a shape including a mark (for example, one corner drop of the apex) so as to avoid mistakes on the front and back sides, top, bottom, left and right of the sheet.

The transparent substrate used in the present embodiment is a material that transmits visible light (average transmittance is 60% or more, preferably about 80% or more at a wavelength of 380 nm to 780 nm), and is more read than a dot pattern. Although it will not specifically limit if the reflectance of the infrared rays used is low enough, What was formed with the material with few optical malfunctions is preferable. A so-called film, sheet, or plate is appropriately used. Specifically, as the material for the transparent substrate, glass, TAC (triacetyl cellulose), PET (polyethylene terephthalate), polycarbonate, polyvinyl chloride, acrylic, polyolefin, or the like is preferably used. Moreover, thickness is suitably selected from the range of about 20-5000 micrometers according to material, required performance, and a usage form.

In addition, the continuous printed matter and the coordinate input transparent sheet of the present embodiment are provided on a transparent substrate in order to give strength enough to withstand repeated contact with the input terminal when handwritten input is performed with a pen-type input terminal. A hard coat layer (a surface protective layer made of a hard coating film) may be provided. The material for the hard coat layer is not particularly limited, and those used in the field of ordinary transparent sheets and lenses can be used. For example, acrylic resin, silicon-based resin, and the like that are crosslinked and cured by ultraviolet rays, electron beams, heat, and the like are representative.
Furthermore, in order to ensure the visibility of the display device behind the coordinate input transparent sheet, an antireflection film or the like may be provided on the surface or inside of the sheet. The material of the antireflection film is not particularly limited, and those used in the field of normal display transparent sheets and lenses can be used. For example, a dielectric in which a thin film of a low refractive index material such as magnesium fluoride or fluorine resin and a thin film of a high refractive index material such as zirconium oxide or titanium oxide are laminated so that the low refractive index thin film is the outermost surface A multilayer film or the like is a typical one.

It is preferable that the ink constituting the coordinate information pattern that can provide coordinate information used in the present embodiment includes a material that selectively reflects infrared rays (hereinafter also referred to as infrared reflection material).
The infrared reflecting material is not particularly limited as long as it is transparent in the visible region (average transmittance at a wavelength of 380 nm to 780 nm is 60% or more, preferably about 80% or more) and has infrared reflecting performance. However, for example, a liquid crystal material having a cholesteric structure and an infrared reflective pigment are preferable.
In the present embodiment , the wavelength of infrared light is not particularly limited, but normally used is light in the near infrared region of 800 to 2500 nm.

In the present embodiment , when a liquid crystal material having a cholesteric structure is used as the material of the coordinate information pattern, the property of reflecting the infrared rays of the coordinate information pattern is the wavelength selective reflectivity (Bragg reflection in X-ray diffraction) of the cholesteric structure. The selective reflection peak wavelength (wavelength satisfying the Bragg reflection condition) is determined by the pitch length of the cholesteric structure included in the pattern, and nematic liquid crystals and chiral agents are used as liquid crystal materials. Is used, the pitch length can be controlled by adjusting the amount of chiral agent added. When polymer cholesteric liquid crystal is used as the liquid crystal material, a polymer material having a target pitch length may be selected.
The infrared reflective pigment is a (colored) pigment that reflects in the near infrared region, and is calculated by the spectral reflectance (Rλi) defined by the architectural heat ray shielding and glass scattering prevention film defined in JIS A5759. This is a near-infrared reflective coloring pigment having an integral reflectance of 50% or more in a wavelength range of 780 to 2100 nm in terms of solar reflectance, and is roughly classified into an inorganic infrared reflective pigment and an organic infrared reflective pigment.
When printing the ink using the infrared reflective pigment, it is preferable to perform the easy adhesion improving treatment on the printing surface of the transparent substrate because the printing property or adhesiveness of the ink is improved. The easy adhesion improving treatment is not particularly limited and may be a known method. For example, corresponding to a base film made of a resin mainly composed of polyethylene terephthalate, the easy adhesive layer may be a polyester resin or the like. desirable.

In the coordinate input transparent sheet of the present embodiment , the coordinate information pattern is set so that the position information of the input terminal on the sheet surface can be derived from the partial pattern read by the input terminal equipped with the sensor. Is.
The coordinate information pattern in the present embodiment is also exemplified in Patent Document 1. For example, a plurality of dot shapes are set, and a combination of dots having a plurality of shapes arranged in a predetermined range in a plane is patterned. A pattern that is a combination of the sizes of overlapping portions of the ruled lines within a predetermined range by changing the thickness of the ruled lines arranged vertically and horizontally, and the x and y coordinate values are directly The size and the like can be mentioned, but as a particularly simple and preferable one, set reference points arranged at equal intervals vertically and horizontally, and arrange dots displaced vertically and horizontally with respect to this reference point. There is a method using a relative positional relationship of dots from the reference point. This method is advantageous in increasing the resolution of the input device because the dot size can be made small and constant.
The dot shape of the dot pattern is not particularly limited as long as it can be easily distinguished from the adjacent dots. Usually, the shape in plan view is a circle, an ellipse, a polygon, or the like. In addition, there is no particular limitation on the three-dimensional shape of the dots. Normally, when winding a substrate on which dots are printed, the pen-type input terminal comes into contact with the point where damage due to rubbing between the substrate and the dots hardly occurs. At this time, it is preferable to have a substantially disk shape because it slides smoothly without resistance and the dots and the terminal are less likely to be damaged each other, but may be hemispherical, concave, or polygonal.

In the case of reflection by a cholesteric structure as an infrared reflecting material, generally the thicker the printed thickness, the higher the reflection strength, but if it is too thick, the liquid crystal orientation is disturbed, the transparency is lowered, and the drying load is increased. The printing thickness is usually about 1 to 20 μm, preferably about 3 to 10 μm.
Moreover, when using an infrared reflective pigment as the infrared reflective material, the printed thickness of the infrared reflective pattern may be 0.1 μm or more, but is usually about 1 to 20 μm. In general, the thicker the film thickness, the better the reflectivity. However, since the coloring becomes dark and the transparency is impaired, it is necessary to adjust appropriately.

The coordinate input transparent sheet (hereinafter sometimes referred to as a transparent sheet) of the present embodiment obtained as described above is used as follows, for example. The transparent sheet is mounted on the surface or front of a display device capable of displaying an image and reads an infrared reflection pattern from the transparent sheet using an input terminal (input sensor) capable of irradiating and detecting infrared rays. Provides information on the location of the input terminal above.

However, the transparent sheet obtained as described above does not necessarily have the same pattern when cutting out from a continuous printed matter. In addition, for example, when cutting into a rectangle, each side of the sheet may be inclined with respect to the coordinate axis, or may include a repeated boundary line of the coordinate pattern.
In order to solve this problem in the present invention, when a transparent sheet is actually arranged in front of the display and used as a coordinate input transparent sheet in combination with a coordinate input sensor, the coordinate information provided by the sheet Correction is performed in which the coordinate information on the display is associated one-to-one. The algorithm used for correction is not particularly limited as long as a known method is used.
Hereinafter, an example of the correction method will be described.

First, the coordinates provided by the sheet are distinguished from the sheet coordinates, and the coordinates on the display are distinguished from the display coordinates. Unless otherwise specified, the sheet coordinates mean the coordinates provided by the coordinate information pattern, and do not represent the number of pixels or dots constituting the actual pattern and the actual sheet size. For example, if there are two sheets of the same size on which different coordinate information patterns are formed, the coordinate information provided is different even if they are the same point relative to each other. The sheet coordinates are different.
Similarly, display coordinates are coordinates handled by computers that use the display as a display device, and are affected by the screen resolution setting, etc., but indicate the actual number of pixels and dots of the display and the actual display dimensions. is not. For example, even if the same display is used, if the computer has a screen resolution of 1024 x 768 pixels and 640 x 480 pixels, the display coordinates on the upper right of the screen will be (1024,768) and ( 640,480).

Here, in a pattern that can be arranged in front of the display and can provide coordinate information, sheet coordinates and display coordinates should have a one-to-one correspondence (see FIG. 2).
At this time, since the sheet coordinates provided by the sheet become the display coordinates below (or behind) the sheet coordinates as it is, the input sensor need only transmit the read sheet coordinates to the computer.
However, if this is strictly observed, it is necessary to prepare a sheet of the same size for every display, and the assortment and cost are very high. In addition, if the position or angle at which the sheet is installed is deviated, the sheet coordinates and the display coordinates are deviated, resulting in a disadvantage.
To solve this, the sheet coordinates read by the input sensor are converted in real time (or with a slight time lag) to the display coordinates below (or behind) the display coordinates, and the input sensor determines which position of the display coordinates to the computer. Just tell them you are pointing.

The correction may be performed by the input sensor, may be performed by an independent device between the input sensor and the computer, or the computer itself (hardware, software) may perform such correction. When correction is performed by the computer itself, it is desirable to use so-called driver software (resident software) such as a general mouse driver. Of course, the application software itself that uses the coordinate input function may have the function.
When this coordinate input sheet is used in a dedicated application, it is not always necessary to convert the sheet coordinates into display coordinates, and can be appropriately converted into a coordinate system used in the application.

As a specific example, the following correction is performed.
Here, a coordinate system is considered in which the lower left is the origin, the x-axis extends in the right direction, and the y-axis extends in the upper direction. However, the numerical values of the coordinates are merely examples and are not limited.
The cut sheet shape and the display shape are rectangular.
(1) When the sheet coordinate pattern is repeated (a0, b0)-(a1, b1) and a part not including the repeated part boundary is cut out in the range of horizontal w and vertical h Correction (see FIGS. 3A to 3C)
Coordinate conversion is performed so that the coordinate information provided by the four corner patterns of the sheet corresponds to the four corner coordinates on the display.
For example, in order to convert a point P that can be read as sheet coordinates (x, y) in FIG. 3B to a point P ′ on the coordinates on the display in FIG.
x ′ = (x−a) / w × 1024 and y ′ = (y−b) / h × 768
The values of a, b, h, and w can be calculated by reading the sheet coordinates of the point in FIG. 3B corresponding to the vertices on the diagonal line in FIG. 3C, for example, the lower left and upper right coordinates. Can be obtained.
The coordinate calculation is not limited to this example, and various known methods are possible.
Further, it is not always necessary to read the vertex, and the coordinates of an arbitrary point on the display set so as to be convenient for calculation may be read. For example, to read the vertex of the rectangular region set inside several cm from the four sides of the display. FIG. 4 shows an example (+ mark) of the vertex reading position for such coordinate correction.

(2) Correction when the sheet coordinate axis and the four sides of the sheet are slanted when cutting the sheet (see Fig. 5)
For example, as shown in FIG. 5A, when the angle of the sheet coordinate axis indicated by the sheet pattern and the four sides of the sheet is inclined by θ, the sheet coordinates (x, y) of FIG. In order to convert the point P into the point P ′ on the display coordinates in FIG. 3c, first, as shown in FIG. 5B, the rotation processing is performed, and the point P ″ whose relative position in the sheet is the same as the point P is changed to four sides. If the coordinates are expressed as coordinates P ″ (x ″, y ″) in the sheet coordinate system in which the coordinate axes are not inclined, and then coordinate conversion is performed in the procedure of FIG. 3B to FIG. 3C as described in (1). good.
In the above example, the values of a, b, w · cosθ, w · sinθ, h · sinθ, h · cosθ can be calculated by first reading the sheet coordinates at the four corners of FIG. sinθ and cosθ can be obtained.
Here, from the sheet coordinates (x, y) provided from the coordinate pattern of the point P on the sheet, and a and b that have already been obtained, sin (θ + θ ′) = (y−b) / √ ((x−a) ² + (y−b) ² ) and cos (θ + θ ′) = (x−a) / √ ((x−a) ² + (y−b) ² )
Therefore, the values of sin (θ + θ ′) and cos (θ + θ ′) are obtained. Further, sin θ ′ and cos θ ′ are obtained from the values of sin (θ + θ ′), cos (θ + θ ′), sin θ, and cos θ from the addition theorem.
Thus, the sheet coordinates P (x, y) obtained from the coordinate system tilted with respect to the four sides of the sheet at the point P in FIG. 5A are represented as relative positions in the sheet as shown in FIG. Is the same as P, and the sheet coordinates of the lower left point of the sheet are (a, b) and the sheet coordinates of the upper right point are (a + w, b + h), The coordinate information (x ", y") of the point P "expressed in a new sheet coordinate system whose four sides are not inclined with respect to the coordinate axis is x" = √ ((x-a) ² + (y-b) ² ) × cosθ '
y ″ = √ ((x−a) ² + (y−b) ² ) × sin θ ′
Can be obtained.
Thereafter, as in (1), conversion may be performed so that the sheet coordinates of P ″ (x ″, y ″) in FIG. 5B correspond to the coordinates on the actual display.
These conversion methods are not limited to those described here, and various known methods may be used.
Further, depending on the width of the sheet to be printed and the size of the sheet that is actually cut out, there are cases where there is less loss when the sheet is intentionally rotated by 90 ° and cut out. Naturally, this correction can also be applied to such a case.

(3) When the cut sheet is placed in front of the display, correction is made when the coordinate axis of the sheet and the coordinate axis of the display are skewed (see Fig. 6)
For example, as shown in FIG. 6, when the sheet coordinate axis indicated by the sheet pattern and the angle of the display are inclined by θ, this can be considered substantially the same as FIG.
By rotating the sheet coordinates of the point P (x, y) on the sheet once by the same method as in the above (2), the rest of the points P "(x", in FIG. The conversion may be performed so that the sheet coordinates of y ") correspond to the coordinates on the actual display.
These conversion methods are not limited to those described here, and various known methods may be used.
In addition, instead of reading the four corners of the display, when reading and correcting points that exist to some extent from the four sides of the display (for example, the right figure in FIG. 4), the size of the sheet is abbreviated as the display. Even when they are the same and do not cover the entire surface of the display, it is possible to apply correction. However, in such a case, coordinates cannot be detected for points on the display that are not covered by the sheet. Therefore, it is preferable to arrange the sheet so that it does not rotate as much as possible, or to make it slightly larger. .

(4) Correction when the coordinate pattern repeat consists of (a0, b0)-(a1, b1) repeats, and a part including the repeat boundary part is cut out in the range of horizontal w and vertical h ( (See Figure 7)
In this case as well, coordinate transformation is performed in which the coordinates of the four corners of the sheet correspond to the coordinates of the four corners on the display. At this time, since the boundary of the repetitive pattern is included, the x coordinate in the area of the pattern 2 in FIG. 7B is smaller than the x coordinate of the pattern 1 portion.
Here, if the values of a0 and a1 are known in advance, the values of a, b, w, and h can be calculated by reading the lower left and upper right coordinates in FIG. 7B, for example.
Further, in order to convert the sheet coordinates P (x, y) on the sheet in FIG. 7B to the corresponding display coordinates P ′ (x ′, y ′) in FIG. ) Almost the same as
When a ≦ x ≦ a1, x ′ = (x−a) / w × 1024 and y ′ = (y−b) / h × 768
Otherwise x ′ = (x−a0 + a1−a) / w × 1024 and y ′ = (y−b) / h ×
768
What should I do?
The coordinate calculation is not limited to this example, and various known methods are possible.
Further, it is not always necessary to read the vertex, and the coordinates of an arbitrary point on the display set so as to be convenient for calculation may be read.
In this case, if the coordinate axis of the sheet is inclined as in (2) or (3), the same processing as in (2) or (3) may be additionally performed.

(5) When the sheet covers three or more areas (see Fig. 8)
In some cases, the continuous printed material in the present embodiment may be printed by repeating a plurality of patterns with respect to the substrate width, and even when the pattern is cut out, the value of the boundary of the sheet coordinates of each pattern region is known. If so, the process performed in (4) can be expanded and corrected.

In addition, when cutting out across a boundary portion of a continuous printed matter printed by repeating a plurality of patterns, correct coordinate information may not be provided at the repeated boundary portion of the pattern depending on the pattern algorithm that provides the coordinate information ( (See FIG. 9).
In the case of FIG. 9A, there is no particular problem, but in the case of FIG. 9B, it is difficult to read the correct coordinates at the pattern boundary. Further, as shown in FIG. 9C, when taking a measure such as opening a gap that does not interfere with the pattern, the resolution of the coordinate information at the boundary portion is lowered.
As described above, when a coordinate providing algorithm that interferes with a repeated boundary portion of a pattern is used, exception processing is required at the pattern boundary portion.
The determination of whether or not the read sheet coordinates are abnormal (whether it corresponds to exception processing), for example, it is possible to create a determination formula or a data table in advance for the abnormal coordinate information pattern indicated by the pattern boundary, Exceptions when the coordinate range suddenly deviates from the expected coordinate range, or when coordinate information is continuously read, when coordinate information that is extremely deviated or when the coordinate information cannot be read suddenly, etc. It is also good.
As an exception process, when some coordinate information is obtained, for example, coordinate conversion may be performed based on a data table or a mathematical formula that is held in advance, and when coordinate information is not obtained, immediately before or after You may guess from the change of the read sheet coordinate.
In these exception processes, if there is a boundary area where the coordinate information cannot be obtained, the coordinate information cannot be obtained when the portion is pointed by the sensor pinpoint. Therefore, it is necessary to move the sensor slightly.
In order to perform smooth coordinate reading by the sensor, it is preferable not to have a blank area of coordinate information, and for that purpose, it is preferable to use a pattern that does not have a blank area of coordinates at the coordinate information pattern boundary. . Alternatively, when cutting out the sheet, it is preferable that the boundary portion is not included, or the boundary portion is close to the end of the sheet so that there is no practical problem even if it is included.

From the above, the following effects can be obtained by this embodiment .
According to this embodiment , since the coordinate providing sheet may be cut out at an arbitrary position, it is not necessary to change the printing plate for each display size, and continuous production can be performed. Thereby, the productivity at the time of sheet manufacture is greatly improved.
Since strict alignment when cutting out the sheet is not required, a position detection mark for cutting position alignment is also unnecessary. In particular, since the sheet of the present embodiment is transparent to visible light, conventionally, it is necessary to use a sensor that detects infrared rays to perform position detection, or to print a position detection mark using visible ink. Yes, this can be omitted. At the same time, the occurrence of defective products due to the shift of the cutting position is reduced.

EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to a following example, unless the summary is exceeded.
Example 1
(1) Production of gravure plate Coordinate information pattern printing data capable of providing coordinate information by the arrangement of dots is prepared in a 17-inch monitor size (length 277 mm x width 344 mm), and the circumference is 344 mm (plate diameter 109.5 mm). ), A gravure plate in which a pattern was continuously printed in the horizontal direction on the surface of a gravure roll having a width of 300 mm was prepared. The coordinate information pattern at this time is a coordinate system that matches the resolution of the 17-inch monitor.
(2) Manufacture of transparent sheet for coordinate input Using ink containing ultraviolet curable cholesteric liquid crystal set to selectively reflect only infrared as ink, using TAC film with width of 300 mm as transparent substrate, The ink was continuously printed, dried and cured on the substrate to continuously form a transparent infrared reflection pattern capable of providing coordinates. Further, an ultraviolet curable resin was applied, dried and cured thereon to form a transparent hard coat layer.
(3) Cutting out transparent sheet for coordinate input Several sheets were cut out with a 15-inch monitor size from an arbitrary position of the pattern portion of the obtained sheet using a cutter. Some of the cut sheets do not include the pattern boundary portion at the time of printing.
(4) The initial setting function of the initial coordinates by software is provided, and the above sheet is pasted with a transparent tape on the surface of a 15-inch display connected to a computer on which coordinate reading software by an infrared sensor is operating. It was. Start coordinate compare Tadashiyo software, by pointing the sensor a plurality of points displayed on the screen, reads the sheet coordinates corresponding to the display coordinates, and sets the coordinate correction condition.
(5) After the initial setting by the coordinate reading software, a one-to-one correspondence between the position indicated by the coordinate reading sensor and the cursor position on the display can be obtained. In addition, when the sheet is repositioned or the position of the sheet is slightly shifted, the initial setting is performed each time, and the sheet can be used without any problem.

Comparative Example 1
In the first embodiment, when a computer without a function for initial setting of coordinates is used, a one-to-one correspondence between the position indicated by the coordinate reading sensor and the cursor position on the display cannot be obtained, and it can be normally used as a coordinate input sheet. could not.
Comparative Example 2
In Comparative Example 1, when a sheet is cut out accurately with a 17-inch coordinate pattern size and a 17-inch size display is used as a display, it can be used normally as a coordinate input sheet. It was. However, it is difficult to accurately cut out a transparent pattern from a transparent sheet, and the yield at the time of cutting is reduced.
Further, if the sheet is slightly displaced when the sheet is placed on the front surface of the display, the position of the coordinate reading sensor and the position of the cursor are shifted. For this reason, it has been necessary to set the position of the coordinate input sheet again accurately.

As described above in detail, according to the method for manufacturing a coordinate input system of the present invention, a coordinate input system is obtained by obtaining a coordinate input transparent sheet with a simplified manufacturing process, a low manufacturing cost, and a high yield. Can be provided.

It is a figure which shows the state which cuts out the transparent sheet for coordinate input from continuous printed matter. It is a figure which shows the corresponding | compatible state of the transparent sheet for coordinate inputs, and a display coordinate. It is a figure which shows the correction method of the transparent sheet for coordinate input which cut out the part which does not contain a repetition partial boundary. It is a figure which shows the example of the reading position of the vertex for coordinate correction. FIG. 10 is a diagram illustrating a correction method when a sheet coordinate axis and four sides of the sheet are inclined when a sheet is cut out. It is a figure which shows the correction method when the coordinate axis of a sheet | seat and the coordinate axis of a display become diagonal when arrange | positioning the cut-out sheet | seat in front of a display. It is a figure which shows the correction method of the transparent sheet for coordinate input which cut out a part including the boundary part repeatedly from continuous printed matter. It is a figure which shows the state in which the transparent sheet for coordinate input cut out from a continuous printed matter spans three or more area | regions. It is a figure which shows the state of the repeating boundary part of a coordinate information pattern. It is a figure which shows the printing state of the conventional transparent sheet for coordinate input.

Explanation of symbols

1: Continuous printed matter of transparent sheet for coordinate input 2: Transparent substrate 3: Coordinate information pattern 4: Transparent sheet for coordinate input (transparent sheet)

Claims (3)

A coordinate information pattern showing the same coordinate range is repeated on a sheet in which a coordinate information pattern is formed of a liquid crystal material having a cholesteric structure that is transparent in the visible region and has infrared reflectivity on a transparent substrate transparent in the visible region. A step of forming
For each display, from the repeated coordinate information pattern of the sheet, cutting or punching so as not to exceed the pattern boundary, and forming a display arrangement sheet,
Arranging the display arrangement sheet on a display screen;
A step of causing a coordinate input sensor to read a coordinate information pattern of the display arrangement sheet located on two or more corners on the display screen to obtain sheet coordinates on the display arrangement sheet;
And a step of obtaining an arithmetic expression for converting sheet coordinates on the display arrangement sheet into display coordinates on the display screen based on the sheet coordinates. On a transparent transparent substrate in the visible region, the sheet coordinate information pattern is formed by a liquid crystal material having a cholesteric structure having an infrared reflective transparent in the visible region, coordinate information pattern representing the same coordinate range is repeated A step of forming
For each display, from the repeated coordinate information pattern of the sheet, cutting or punching so as not to exceed the pattern boundary, and forming a display arrangement sheet,
Arranging the display arrangement sheet on a display screen;
A coordinate information pattern of the display arrangement sheet positioned inside the side of the display screen is read by a coordinate input sensor to obtain sheet coordinates on the display arrangement sheet;
And a step of obtaining an arithmetic expression for converting sheet coordinates on the display arrangement sheet into display coordinates on the display screen based on the sheet coordinates.   3. The coordinates according to claim 1, wherein in the step of forming the display arrangement sheet, the display arrangement sheet is formed with a mark shape so as not to make a mistake in the front, back, top, bottom, left and right of the sheet. A method for manufacturing an input system.

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