JP2004185495A - Coordinate input device, display device and method and program for inputting coordinate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To more accurately select the coordinates of a touch point intended by a user when two or more positions are simultaneously touched on the display screen of a display device with a touch panel. <P>SOLUTION: When a user touches the display screen 101 of the device with a pen mouse or the like held by the user, the coordinates of the touch parts are detected. When the user touches the screen with the pen mouse held by the user, not only parts 401, 501, other parts 402, 502 may also be touched by the back of a hand holding the pen mouse. When the user's dominant hand is the right hand in this case, the coordinates of the most left side touch part 401 are selected in the figure, and in the case of the left hand, the coordinates of the most right side touch part 501 are selected. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a coordinate input device for inputting coordinates of a touched point on a display screen, a display device, a coordinate input method, and a program.
[0002]
[Prior art]
Conventionally, a display device with a touch panel in which a display device such as a PDP (Plasma Display Panel) or a liquid crystal rear projector and a coordinate input device are integrated has been used. As a coordinate input device mounted on such a display device with a touch panel, light is emitted from light sources provided at a plurality of different positions toward a display screen, and a reflection member that reflects the irradiated light recursively. Receives reflected light. Then, there is a method in which the presence or absence of a shielding object is detected from the result of the light reception, and the coordinates of the shielding object are acquired (for example, see Patent Document 1).
[0003]
Display device with a touch panel having a coordinate input device as described above, a user can input any command to the device side by pointing on the display screen with a finger or a pen mouse, etc. There is an example in which a character or a figure corresponding to the moving miracle can be drawn on a display screen by being moved.
[0004]
[Patent Document 1]
JP 2001-14091 A
[0005]
[Problems to be solved by the invention]
However, in a display device with a touch panel having a function of performing drawing according to the movement locus of the position pointed as described above, when the user performs a work of writing with a pen mouse or a finger on the display screen, the back of the hand is displayed on the display screen. When it touches, the coordinate input device detects not only the touch point of the fingertip and the pen mouse but also the contact point of the back of the hand. That is, coordinates of a plurality of places may be detected at the same time.
[0006]
In such a case, the conventional coordinate input device cannot determine which of the plurality of detected coordinates is the one touched by the fingertip or the point touched by the pen mouse, and as a result, There has been a problem that a figure or the like different from a moving miracle of a finger or the like is drawn or drawing is not performed at all.
[0007]
The present invention has been made in view of the above, even when the coordinates of a plurality of locations are detected, a coordinate input device, a display device, a coordinate input device that can more accurately obtain the coordinates of the touch point intended by the user, It is an object to obtain a coordinate input method and a program.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is a coordinate detecting means for detecting coordinates on a display screen touched by an object, and a hand used by a user to touch the display screen is a right hand. Left and right discriminating means for discriminating whether the hand is a left hand, and when a plurality of coordinates are detected by the coordinate detecting means, based on the discrimination result of the left and right discriminating means, a plurality of coordinates detected by the coordinate detecting means And a selecting means for selecting one of the coordinates.
[0009]
According to the first aspect of the present invention, when a plurality of touch points on the display screen are detected by the coordinate detecting means, the coordinates are selected by the selecting means based on whether the hand used by the user is the left hand or the right hand. Is done. When the user touches the display screen, coordinates other than the touch point intended by the user may be detected by touching the display screen with another part such as the back of the hand used for the touch. Generally, there is a tendency that the positional relationship between the intended touch point and the touch point of another part differs depending on the hand to be used. In the present invention, attention is paid to the positional relationship between a plurality of touch points that fluctuate depending on the hand to be used, and one coordinate is selected depending on whether the hand to be used is the right hand or the left hand. The coordinates can be obtained more accurately.
[0010]
According to a second aspect of the present invention, in the configuration of the first aspect of the present invention, the right / left hand used by the left / right discriminating means for the user to touch the display screen based on the touch content of the user is the right hand. Or left hand.
[0011]
According to the second aspect of the present invention, since the left / right discriminating means discriminates the hand used by the user based on the content of the touch from the user, the discrimination of the hand used is accurate, and as a result, more accurate The coordinates of the touch position intended by the user can be selected.
[0012]
According to a third aspect of the present invention, in the configuration of the first or second aspect, when the determination result by the left / right determination means is a right hand, the selection means detects the right hand. From among a plurality of coordinates, when the display screen is viewed from the position facing the display screen, the leftmost coordinate is selected, and when the result of determination by the left / right determination means is a left hand, the coordinates are selected. When the display screen is viewed from a position facing the display screen, the rightmost coordinate is selected from the plurality of coordinates detected by the detection means.
[0013]
When the user has a pen mouse or the like to operate, when using the right hand, touches the display screen. The tip of the pen mouse touches the display screen. It is generally located on the left side, and when using the left hand, the tip of the pen mouse is generally located on the right side. In view of such a tendency, according to the invention according to claim 3, the selecting means selects the leftmost coordinate when the hand to be used is the right hand, and selects the rightmost coordinate when the hand to be used is the left hand. Is selected, the coordinates of the touch point intended by the user can be selected more accurately.
[0014]
The invention according to claim 4 is a display device including a display device having a display screen and a coordinate input device, wherein the coordinate input device detects coordinates on the display screen touched by an object. Coordinate detection means, left and right determination means for determining whether the hand used by the user to touch the display screen is right hand or left hand, and when a plurality of coordinates are detected by the coordinate detection means, Selecting means for selecting one coordinate from a plurality of coordinates detected by the coordinate detecting means based on a result of the determination by the left / right determining means.
[0015]
Since the invention according to claim 4 has the same configuration as the invention according to claim 1, even if there are a plurality of detected coordinates, the coordinates of the touch point intended by the user can be selected more accurately. can do.
[0016]
According to a fifth aspect of the present invention, there is provided a coordinate detecting step for detecting coordinates of a plurality of points on a display screen touched by an object, wherein a hand used by the user to touch the display screen is a right hand or a left hand. A left / right determination step of determining whether or not a plurality of coordinates are detected by the coordinate detection means, based on a determination result of the left / right determination step, from among the plurality of coordinates detected by the coordinate detection step. And a selecting step of selecting one coordinate.
[0017]
According to the invention according to claim 5, when a plurality of touch points on the display screen are detected, the coordinates are selected by the selecting means based on whether the user's hand is the left hand or the right hand. Then, in the present invention, the user focuses on the positional relationship that fluctuates depending on the hand used for touch, and selects one coordinate depending on whether the hand to be used is the right hand or the left hand. Can be obtained more accurately.
[0018]
The invention according to claim 6 is a coordinate detecting means for detecting the coordinates of the computer on the display screen touched by the object, and the hand used by the user to touch the display screen is the right hand or the left hand. Left and right discriminating means for judging whether there are a plurality of coordinates on the display screen designated by an object, selecting means for selecting one coordinate from the plurality of coordinates based on the discrimination result of the left and right discriminating means Function as
[0019]
According to the invention according to claim 6, the computer can function as a device having the same configuration as that of the invention according to claim 1, and even if there are a plurality of detected coordinates, the touch point intended by the user is intended. Can be selected more accurately.
[0020]
According to a seventh aspect of the present invention, in the configuration according to the sixth aspect, when the determination result by the left / right determination unit is a right hand, the selection unit selects the display from among the plurality of coordinates. When the display screen is viewed from the position opposing the screen, the leftmost coordinate is selected, and when the result of the determination by the left / right determination means is a left hand, the display screen is selected from the plurality of coordinates. When the display screen is viewed from a position opposing to, the rightmost coordinate is selected.
[0021]
According to the invention according to claim 7, the computer can function as a device having a configuration similar to that of the invention according to claim 3, and the coordinates of the touch point intended by the user can be more accurately selected.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of a coordinate input device, a display device, a coordinate input method, and a program according to the present invention will be described in detail below with reference to the accompanying drawings.
[0023]
A. Configuration of the embodiment
FIG. 1 is a block diagram illustrating a configuration of a display device with a touch panel function including a coordinate input device according to an embodiment of the present invention. As shown in FIG. 1, the display device 1 includes a display device 10 and a coordinate input device 20, and each of the display device 10 and the coordinate input device 20 is connected to a PC (Personal Computer) 30. .
[0024]
The display device 10 has a display screen 101 such as a PDP, an LCD (Liquid Crystal Display), a CRT (Cathode-Ray Tube), and displays an image corresponding to image data supplied from the PC 30 on the display screen 101. I do.
[0025]
The coordinate input device 20 includes optical units 102A and 102B, reflecting members 103A, 103B and 103C, a computing unit 104, and an interface unit 105.
[0026]
The three reflecting members 103A, 103B, and 103C are light-reflecting reflecting members that reflect incident light at an angle of 180 degrees, and are arranged so as to cover three sides of the rectangular display screen 101. More specifically, the reflecting members 103A and 103C are members having substantially the same length as the length of the display screen in the vertical direction, and the respective longitudinal directions are along the left end and the right end of the display screen 101 in the drawing. Are located. The reflecting member 103B is a member having substantially the same length as the horizontal direction of the display screen 101, and is arranged so that the longitudinal direction is along the upper end of the display screen. By arranging the respective reflection members in this manner, the upper side and the left and right sides of the display screen 101 are covered.
[0027]
The optical units 102A and 102B are respectively disposed on the left and right ends of the lower end of the display screen 101, that is, on the lower ends of the reflection members 103A and 103C. The optical units 102A and 102B radiate fan-shaped light from the lower side of the display screen 101 that is not covered with the reflection members 103A, 103B and 103C toward the display screen side. The area is illuminated. Further, the optical units 102A and 102B receive the reflected light of the irradiated light from the reflection members 103A, 103B and 103C, and output the light reception result to the calculation unit 104.
[0028]
Here, FIG. 2 is a diagram of the optical unit 102A viewed from a side facing the display screen 101, and FIG. 3 is a diagram of the optical unit 102A viewed from a direction along the display screen 101. As shown in FIGS. 2 and 3, the optical unit 102A includes a light source 201, a lens 202, a lens 203, a light receiving unit 204, and a half mirror 205.
[0029]
The light source 201 has a semiconductor laser and emits laser light (indicated by a dashed line in the figure). The lens 202 is a lens that diffuses the laser light emitted from the light source 201, and the laser light that has passed through the lens 202 is diffused in a fan shape when viewed from the side facing the display screen 101 (see FIG. 2).
[0030]
The half mirror 205 allows the light diffused by the lens 202 as described above to pass to the display screen 101 side (see FIG. 1), which is the upper side of the figure, while the light is reflected from the reflection members 103A, 103B, and 103C. The reflected light is reflected toward the light receiving section 204 (the right side in FIG. 3). This reflected light passes through the lens 203 and is received by the light receiving unit 204.
[0031]
The light receiving unit 204 includes a CCD (Charge Coupled Device) or the like, receives light reflected from the reflecting members 103A, 103B, and 103C, and outputs received light data to the calculation unit 104 illustrated in FIG.
[0032]
The above is the configuration of the optical unit 102A. By using such a unit in which the light source 201 and the light receiving unit 204 are integrated, adjustment of the positional relationship (distance, center alignment, etc.) of each component can be performed for each unit. Adjustment work is facilitated. Since the configuration of the optical unit 102B is the same as that of the optical unit 102A, a detailed description of the configuration is omitted.
[0033]
The arithmetic unit 104 has a memory such as a CPU (Central Processing Unit), a ROM (Read Only Memory) or a RAM (Random Access Memory), and performs processing such as coordinate detection and coordinate selection according to a program stored in the memory. I do. The coordinate detection process performed by the arithmetic unit 104 is a process of detecting the coordinates of a touch point on a display screen by an object such as a user's finger or a pen mouse based on light reception data supplied from the optical units 102A and 102B. . The coordinate detection by the arithmetic unit 104 will be described with reference to FIG.
[0034]
As shown in the figure, light is emitted from the optical units 102A and 102B to the entire area of the display screen 101, and the light is reflected by the reflecting members 103A, 103B and 103C, and the reflected light is reflected by the optical units 102A and 102B. Received. Therefore, as shown in the figure, when a certain point is touched by a user's finger or the like, light passing through that part is blocked, and is not received by the optical units 102A and 102B. On the other hand, when no object such as a finger is present on the display screen 101, the light is not blocked as described above, and the optical units 102A and 102B receive all the reflected light. The light receiving data is supplied to the arithmetic unit 104, and the coordinates of the touch point 301 are obtained as follows based on the light receiving data.
[0035]
First, the arithmetic unit 104 calculates the optical units 102A and 102B from the optical axis of the light that should be received at the position where the light receiving unit 204 of the optical units 102A and 102B did not receive the light out of the fan-shaped light. The angles (light shielding angles) θL and θR of the straight lines passing through the light receiving points and the light passing points and the touch point 301 are determined. Then, the calculation unit 104 obtains the coordinates (x, y) of the touch point 301 using the angles θL and θR as follows.
x = W × tan θR / (tan θL + tan θR)
y = W × tan θL × tan θR / (tan θL + tan θR)
[0036]
The arithmetic unit 104 outputs the coordinate data including the coordinates obtained as described above to the PC 30 via the interface unit 105. In the present embodiment, the presence or absence of a touch on the display screen 101 is detected based on the received light data of the optical units 102A and 102B. However, even if the touch reaches the position close to the display screen 101 (the position blocking the irradiation light of the optical units 102A and 102B), it is detected that there is a touch. This includes things that are in contact.
[0037]
Further, the coordinate input device 20 according to the present embodiment is configured to be able to detect the coordinates of each touch point even when a plurality of locations on the display screen 101 are touched simultaneously. The detection of the coordinates of a plurality of places touched simultaneously as described above will be described with reference to FIGS.
[0038]
As shown in FIG. 5, when a plurality of points (two points in the illustrated example) are touched at the same time, the reflected light is blocked at two places. An area (dark area) exists. In such a case, when the coordinates are obtained by the above equation, the coordinates A, A ′, B, and B ′ are derived even though the original touch points are two places. It is unknown whether is the coordinate of the touch point.
[0039]
Therefore, the arithmetic unit 104 extracts two coordinates corresponding to a real touch point from the four coordinates as described below using the technique disclosed in Japanese Patent Application Laid-Open No. 2001-318759.
[0040]
First, the arithmetic unit 104 calculates the four coordinates obtained as described above, the peak point (dark point) where the amount of light received by the light receiving unit 204 of each of the optical units 102A and 102B is small, and the predetermined light receiving point (for example, , The center size of the light receiving element) and the image size b of the light receiving unit 204, the diameter size D of the light shielding object at each of the four coordinate points is calculated.
[0041]
The arithmetic unit 104 sets the point having the smallest voltage value among the light receiving waveforms of the light receiving unit 204 shown in FIG. 6 as a peak point, and determines the peak point X and the distance a from the central pixel of the light receiving element which is a predetermined light receiving point. And the imaging size b of the area where the voltage value is smaller than the predetermined threshold value. If two points are touched at the same time, there must be two dark points for each light receiving unit 204, and therefore, the distance a and the image size b are acquired for each.
[0042]
Then, based on the acquired distance a and the imaging size b, the diameter D of the shield corresponding to each dark spot is calculated as follows.
[0043]
As shown in FIG. 7, the distance a between the peak point X and the center pixel is an angle α formed by a perpendicular line from the center of the light receiving unit 204 and a line connecting the center point C of the shield and the peak point X. And the angle α is calculated by the following equation.
α = tan ^-1 (A / f)
Here, f is the focal length of the lens 203.
[0044]
Next, a distance L from the center point C of the shield to the lens 203 is obtained from the coordinates.
The image magnification of the object image of the shielding object received by the light receiving unit 204 depends on the distance L, and the following relationship is established.
L: 1 = D: b
Here, 1 is the distance from the lens 203 to the peak point X. From this relationship, the diameter D of the shield can be calculated by the following equation.
D = (b / l) · L
= (B / (a / sinα)) · L
= (B / (a / sin (tan) ^-1 (A / f))) · L
The arithmetic unit 104 can derive the diameter size D of the shield by substituting the distance a and the imaging size b obtained in the above equation.
[0045]
As described above, the arithmetic unit 104 obtains the diameter size D of the shield at four coordinates for each light reception result of each light receiving unit 204, and calculates the diameter obtained from the light reception result of the light receiving unit 204 of the optical unit 102A for each coordinate. The size D is compared with the diameter size D obtained from the light receiving result of the light receiving unit 204 of the optical unit 102B. Then, the calculation unit 104 detects, as the coordinates of the touch point, two coordinates that the compared diameter size D approximates from among the four coordinates.
[0046]
The configuration for detecting each touch coordinate when two points are touched at the same time is not limited to the configuration using the above-described method. For example, three optical units are provided, and each point is determined based on the light reception result of each optical unit. A configuration for detecting coordinates may be employed.
[0047]
As described above, the coordinate input device 20 according to the present embodiment is configured to be able to detect the coordinates of each touch point when a plurality of places are touched at the same time. At this time, not only the touch by the pen mouse but also the touch of the back of the hand is detected, and the coordinates of each touch point are obtained. When a plurality of coordinates are simultaneously detected in this way, the arithmetic unit 104 determines whether the user's hand is the right hand or the left hand, and, based on the determination result, one coordinate from among the plurality of coordinates. Is performed to select coordinates. The coordinate data including the selected coordinates is output to the PC 30 via the interface unit 105. Therefore, in the present embodiment, as shown in FIG. 8, the calculation unit 104 includes a left and right determination unit 800 that determines whether the hand used by the user to touch the display screen is a right hand or a left hand. And selecting means 801 for selecting one coordinate from among a plurality of detected coordinates based on the result of determination by the left / right determining means 800 when the coordinates of. Are detected. The details of the coordinate selection process performed by the arithmetic unit 104 will be described later.
[0048]
The PC 30 executes a function set in advance to the coordinates indicated by the coordinate data based on the coordinate data supplied from the calculation unit 104 via the interface unit 105. The functions referred to here include, for example, character drawing, figure drawing, and ruled line drawing in which the trajectory of the drag is drawn with a line of a specific color and thickness. The image data created by executing such a function is expanded in the RAM in a format represented by R, G, and B and output from the PC 30 to the display device 10. The display device 10 displays an image corresponding to the image data on the display screen 101.
[0049]
B. Operation of the embodiment
Next, the operation of the coordinate input device 20 having the above configuration will be described.
[0050]
As shown in FIG. 9, when the display device 1 with the touch panel provided with the coordinate input device 20 is powered on, the arithmetic unit 104 sets the user status to the right hand (step Sa1). Here, the user status is a status in which the user touches the display screen when the user uses the touch panel function on the display device 1. In this embodiment, the user status is set after the power is turned on. Is set to the right hand as the default state. The left hand may be set as the default state, or the contents set immediately before the power is turned off may be stored in an EEPROM (Electrically Erasable Programmable) or the like, and the hand ( Left or right) may be set as the usage status.
[0051]
When the user status is set, the calculation unit 104 outputs image data to the display device 10 to display an image prompting the user to input which hand to use on the display screen 101 (step Sa2). As a result, a setting image for selecting and setting a hand to be used as shown in FIG. 10 is displayed on the display screen 101. As shown in the figure, the setting image is displayed at the upper right end of the display screen 101, and a left hand region 702 and a right hand region 701 are displayed. The left hand area and the right hand area are displayed in different ways so that the user can know which hand is currently set. After the power is turned on, the user status is set to the right hand as described above, and in this embodiment, the area of the selected hand (right hand) is shaded as shown in the figure.
[0052]
Next, the arithmetic unit 104 performs a process of detecting coordinates based on the received light data supplied from the optical units 102A and 102B (step Sa3). Thereafter, the arithmetic unit 104 determines whether or not the detected coordinates are plural (step Sa4), and if there are plural detected coordinates, performs a coordinate selection process (step Sa5).
[0053]
As shown in FIG. 11, in the coordinate selection process, the calculation unit 104 determines whether the user status is set to the right hand (step Sb1). When the user status is set to the right hand (determination Yes), the coordinate is located at the leftmost position (the left side in FIG. 1) when viewed from the side facing the display screen 101 among the plurality of detected coordinates. A coordinate having an x coordinate is selected (step Sb2). On the other hand, when the user status is set to the left hand (determination No), the coordinate is located on the rightmost side (the right side in FIG. 1) when viewed from the side facing the display screen 101 among the plurality of detected coordinates. A coordinate having an x coordinate is selected (step Sb3).
[0054]
Returning to FIG. 9, if it is determined in step Sa4 that there is only one detected coordinate, the flow proceeds to step Sa6 without performing the coordinate selection processing.
[0055]
Next, the arithmetic unit 104 determines whether or not the detected coordinates or the coordinates selected by the coordinate selection processing are within the area where the change of the user status to the left hand is touched (step Sa6). That is, it is determined whether or not the point touched by the user with a finger or a pen mouse is the left hand area 702 shown in FIG. 10, and if it is within such an area, the user's hand status is set to the left hand (step Sa7), coordinate detection is performed based on the next received light data (step Sa3).
[0056]
On the other hand, if the coordinates are not in the area where the change to the left hand is touched (No in step Sa6), it is determined whether or not the coordinates are in the area 701 where the change of the user status is touched to the right hand. Is determined (step Sa8), and if it is within such an area, the user status is set to the right hand (step Sa9), and then coordinate detection based on the next received light data is performed (step Sa3).
[0057]
On the other hand, when the coordinates are not within the area where the change to the right hand is touched (No in step Sa8), the coordinates are not within the area where the change to the right hand and the left hand are touched, and the coordinate input device 20 is not used. Therefore, the coordinate data including the coordinates is output to the PC 30 via the interface unit 105 (step Sa10). The coordinate data output to the PC 30 in this manner is used in the PC 30 for drawing processing and the like.
[0058]
The above is the details of the processing operation performed by the calculation unit 104 of the coordinate input device 20. In this embodiment, when the user touches the display screen 101 with a pen mouse or the like, a process corresponding to the touched position, for example, A drawing process or the like according to the miracle of the movement of the touch position is performed.
[0059]
When performing a drawing process or the like in accordance with the movement trajectory of the position touched by the user in this way, the user usually carries a pen mouse or the like on the dominant arm in the same manner as a pencil or the like, and draws a picture or character on paper with a pencil or the like You will operate the pen mouse in the same way. When the user performs this operation, not only the tip of the pen mouse touches the display screen 101 but also the back of the hand used may touch the display screen 101. In such a case, the conventional coordinate input device cannot determine which touch point coordinate data should be used for processing by the PC 30 such as drawing processing when two or more touches are made at the same time, and the The processing corresponding to the operation performed, that is, the processing corresponding to the touch position of the pen mouse cannot be performed.
[0060]
On the other hand, the coordinate input device 20 according to the present embodiment also determines whether the user is using the right hand or the left hand even when a plurality of touches are detected at the same time. In some cases, the coordinate data having the leftmost coordinate as viewed from the side facing the display screen 101 is selected, and in the case of the left hand, the coordinate data having the rightmost coordinate is selected and output to the PC 30, and the drawing processing is performed. And so on. By doing so, even when a plurality of touches are detected at the same time due to the touch of the back of the hand as described above, the coordinate data corresponding to the touch position intended by the user is acquired for the following reason. can do.
[0061]
As shown on the left side of FIG. 12, when a user with a dominant arm has a pen mouse 80 with his right hand and draws characters and pictures on the display screen 101, as shown on the right side of FIG. In addition to detecting a touch on the display screen 101 (touch portion 401), a touch (touch portion 402) of the back of the user's right hand on the display screen 101 may be detected. On the other hand, as shown on the right side of FIG. 13, even when the user holds the pen mouse 80 with his left hand and draws a character or a picture, the user touches the tip portion 81 of the pen mouse 80 (touch portion 501) as shown on the left side of FIG. ) May be detected, as well as the back of the left hand and the touch (the touch portion 502) may be detected.
[0062]
As shown in FIG. 12, when the hand to be used is the right hand, the positional relationship between the portion 401 touched by the tip portion 81 of the pen mouse 80 and the portion 402 touched by the back of the hand is determined by the side facing the display screen 101. The relationship is that the touch portion 401 is located on the left side of the touch portion 402 when viewed from above. On the other hand, when the hand to be used is the left hand, as shown in FIG. 13, the relationship is such that the touch part 501 is located on the right side of the touch part 502.
[0063]
In addition, although the angle at which the pen mouse 80 is held varies from person to person, as shown in FIG. 14, even if the user holds the pen mouse 80 in a relatively horizontal state, when using the right hand, The touch portion 401 is located on the left side of the touch portion 402. Further, as shown in FIG. 15, even if the user holds the pen mouse 80 in a relatively vertical state, the pen mouse 80 is located on the left side of the touch part 402 with respect to the touch part 401 when used with the right hand. Will be.
[0064]
As described above, when the holding method of the pen mouse 80 is general, the touch part 401 is located on the left side of the touch part 402 when the right hand is used, and the touch part 501 is used when the left hand is used. It will be located on the right side of the touch part 502. The coordinate input device 20 according to the present embodiment focuses on the positional relationship between the touch portions (401, 501) of the tip portion 81 of the pen mouse 80 and the touch portions (402, 502) of the back of the hand, and is shown in FIG. When the hand to be used is the right hand, the coordinate data of the touch part 401 located on the leftmost side is selected, and when the hand to be used is the left hand, the coordinate data of the touch part 501 located on the rightmost side is selected. By doing so, the coordinate data of the touch point of the tip portion 81 of the pen mouse 80 can be output to the PC 30 more accurately. When the PC 30 performs the drawing process or the like using the coordinate data of the touch point of the tip portion 81 of the pen mouse 80 that is accurately selected as described above, the operation intended by the user is reflected in the drawing process or the like. is there.
[0065]
C. Modified example
Note that the present invention is not limited to the above-described embodiment, and various modifications as exemplified below are possible.
[0066]
(Modification 1)
In the above-described embodiment, the user refers to the setting screen (see FIG. 10) displayed on the upper right side of the display screen 101, and based on the touch content that the user touches either the right hand area 701 or the left hand area 702, Is set in the coordinate input device 20 (user status) to determine whether the hand to be used is the right hand or the left hand, and the coordinate selection is performed according to the setting. , It may be determined whether the hand to be used is the right hand or the left hand, and the coordinates may be selected.
[0067]
For example, in the display device 1 with a touch panel, a dedicated pen mouse or the like for touching the display screen 101 is often used. When a pen mouse or the like for the touch panel-equipped display device 1 is provided, a switch or the like for the user to input whether the hand used for the pen mouse is the right hand or the left hand is provided. You may. By supplying this switch operation state from the pen mouse to the coordinate input device 20 using wired or wireless communication, the hand used by the user in the coordinate input device 20 is the right hand or the left hand as in the above-described embodiment. Can be determined, and coordinate selection can be performed based on the determination result.
[0068]
(Modification 2)
Further, in the above-described embodiment, both the right hand area 701 and the left hand area 702 are displayed on the setting screen (see FIG. 10) for setting the hand used by the user, and the current setting is shaded. Was displayed, but only the area of the hand that is not currently set is displayed (if the user status is right hand, only the left hand area is displayed). When a point in the display area is touched, The user status may be switched to a hand different from the setting of the user.
[0069]
(Modification 3)
Further, in the above-described embodiment, the user makes a touch whether the hand to be used is the “right hand” or the “left hand”, and the hand to be used is determined based on the touch. Whether the hand used by the coordinate input device 20 is a left hand or a right hand may be determined based on other information.
[0070]
For example, the user may input a user name to the coordinate input device 20, and the coordinate input device 20 may automatically set the user status to the right hand or the left hand based on the input user name. In such a case, the coordinate input device 20 is provided with a conversion table having contents as shown in FIG. 17 in which user name information and hand information to be used are stored in association with each other. By referring to the table, it is possible to determine whether the hand to be used is the left hand or the right hand.
[0071]
Further, as another method of determining the hand used by the coordinate input device 20, the biometric information of the user may be acquired, and the hand to be used may be determined based on the acquired biometric information.
[0072]
(Modification 4)
In the above-described embodiment, the case where the present invention is applied to the coordinate input device 20 having the optical coordinate detection function including the optical units 102A and 102B has been described. The present invention is not limited to a device having a function, and is applicable to a coordinate input device having a coordinate detection function of another method capable of detecting touch coordinates of a plurality of positions when a plurality of positions on the display screen 101 are simultaneously touched. You can also.
[0073]
(Modification 5)
Further, in the above-described embodiment, the above-described processing of coordinate detection and coordinate selection (see FIGS. 9 and 11) is performed by operating according to the program stored in the memory included in the arithmetic unit 104. However, a dedicated hardware circuit that performs the above-described processing may be constructed instead of the arithmetic unit 104, and the hardware circuit may execute the above-described processing.
[0074]
Further, a program for causing a computer to execute the above processing may be provided to a user via a communication line such as the Internet, or the program may be provided on a computer-readable recording medium such as a CD-ROM (Compact Disc). And may be provided to the user.
[0075]
【The invention's effect】
As described above, according to the first aspect of the present invention, even when coordinates at a plurality of locations are detected, it is possible to more accurately acquire the coordinates of the touch point intended by the user. Play.
[0076]
Further, according to the second aspect of the present invention, it is possible to accurately determine the hand to be used, and as a result, it is possible to more accurately select the coordinates of the touch position intended by the user.
[0077]
Further, according to the third aspect of the invention, there is an effect that the coordinates of the touch point intended by the user who uses the touch while holding the pen mouse or the like can be more accurately selected.
[0078]
Further, according to the invention according to claim 4, there is an effect that even when there are a plurality of detected coordinates, the coordinates of the touch point intended by the user can be selected more accurately.
[0079]
Further, according to the invention according to claim 5, there is an effect that the coordinates of the touch point intended by the user can be acquired more accurately.
[0080]
According to the invention of claim 6, the computer can function as a device having the same configuration as that of the invention of claim 1, and even if there are a plurality of detected coordinates, the user's intention is obtained. There is an effect that the coordinates of the touch point can be selected more accurately.
[0081]
According to the seventh aspect of the present invention, the computer can function as a device having the same configuration as the third aspect of the present invention, and the coordinates of the touch point intended by the user can be selected more accurately. It has the effect of being able to do it.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a display device including a coordinate input device according to an embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of an optical unit which is a component of the coordinate input device.
FIG. 3 is a diagram showing a configuration of an optical unit which is a component of the coordinate input device.
FIG. 4 is a view for explaining a method of detecting touch point coordinates on a display screen by the coordinate input device.
FIG. 5 is a diagram for explaining a method of detecting a plurality of touch point coordinates by the coordinate input device.
FIG. 6 is a diagram showing an example of a light receiving waveform output from a light receiving section of the optical unit.
FIG. 7 is a diagram for explaining a method of detecting a plurality of touch point coordinates by the coordinate input device.
FIG. 8 is a block diagram illustrating a functional configuration of a calculation unit of the coordinate input device.
FIG. 9 is a flowchart showing a procedure of a process executed by the coordinate input device.
FIG. 10 is a diagram showing a setting screen displayed on a display screen of the display device by processing of the coordinate input device.
FIG. 11 is a flowchart showing a procedure of a coordinate selection process executed by the coordinate input device.
FIG. 12 is a diagram for explaining a touch portion on the display screen detected by the coordinate input device when a pen mouse is operated with a right hand.
FIG. 13 is a diagram for explaining a touch portion on the display screen detected by the coordinate input device when a pen mouse is operated with a left hand.
FIG. 14 is a diagram for explaining another example of a touch portion on the display screen detected by the coordinate input device when a pen mouse is operated with a right hand.
FIG. 15 is a diagram for explaining another example of a touch portion on the display screen detected by the coordinate input device when a pen mouse is operated with a right hand.
FIG. 16 is a diagram for explaining coordinates selected by the coordinate input device when the pen mouse is operated with the right hand and when the pen mouse is operated with the left hand.
FIG. 17 is a diagram showing the contents of a conversion table used to determine whether a hand used by a user is a right hand or a left hand in a modification of the coordinate input device.
[Explanation of symbols]
1 Display device
10 Display device
20 Coordinate input device
30 PC
80 pen mouse
81 Tip
101 Display screen
102A, 102B optical unit
103A, 103B, 103C Reflecting member
104 arithmetic unit
105 Interface section
201 light source
202 lens
203 lens
204 light receiving section
205 half mirror

Claims (7)

Coordinate detection means for detecting coordinates on the display screen touched by the object,
Left and right discriminating means for discriminating whether a hand used by the user to touch the display screen is a right hand or a left hand;
And selecting means for selecting one coordinate from the plurality of coordinates detected by the coordinate detecting means based on a result of the determination by the left / right determining means when the plurality of coordinates are detected by the coordinate detecting means. A coordinate input device. The coordinate according to claim 1, wherein the left / right determination unit determines whether a hand used by the user to touch the display screen is a right hand or a left hand based on the touch content of the user. Input device. The selecting means,
When the result of the determination by the left / right determination means is a right hand, the leftmost position when the display screen is viewed from a position facing the display screen from among a plurality of coordinates detected by the coordinate detection means. Select the coordinates to
When the result of the discrimination by the left and right discriminating means is a left hand, the position on the rightmost side when the display screen is viewed from a position facing the display screen from among a plurality of coordinates detected by the coordinate detecting means. The coordinate input device according to claim 1, wherein coordinates to be selected are selected. A display device having a display screen, and a display device including a coordinate input device,
The coordinate input device,
Coordinate detection means for detecting coordinates on the display screen touched by the object,
Left and right discriminating means for discriminating whether a hand used by the user to touch the display screen is a right hand or a left hand;
And selecting means for selecting one coordinate from among the plurality of coordinates detected by the coordinate detecting means based on a result of the determination by the left / right determining means when the plurality of coordinates are detected by the coordinate detecting means. A display device characterized by the above-mentioned. A coordinate detection step of detecting coordinates on the display screen touched by the object,
A left / right determination step of determining whether the hand used by the user to touch the display screen is a right hand or a left hand;
A selecting step of selecting one coordinate from the plurality of coordinates detected by the coordinate detecting step based on a determination result of the left / right determining step when the plurality of coordinates is detected by the coordinate detecting means. A coordinate input method. Computer
Coordinate detecting means for detecting coordinates on the display screen touched by the object,
Left and right discriminating means for discriminating whether a hand used by the user to touch the display screen is a right hand or a left hand;
When there are a plurality of coordinates on the display screen instructed by an object, a selection unit that selects one coordinate from the plurality of coordinates based on a determination result of the left / right determination unit,
Program to function as The selecting means,
When the determination result by the left and right determination unit is a right hand, from the plurality of coordinates, select the coordinates located on the leftmost side when viewing the display screen from a position facing the display screen,
When the result of the determination by the left / right determination means is a left hand, it is preferable to select, from the plurality of coordinates, the coordinate located on the rightmost side when viewing the display screen from a position facing the display screen. The program according to claim 6, wherein:

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