JP2000163211A - Planar input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make accurately and intuitively understandable and operable an input device by determining a gap so that a contact point is on an input surface even when the movement of an indication part is limited by an input operation frame. SOLUTION: The internal periphery of the input operation surface frame 6E is formed of a curve which is inwardly convex to the input operation surface 7E and a curve whose corner parts are outwardly convex. The internal periphery of the input operation surface frame 6E is positioned outside an effective sensor area Ls. A sensor nonsetting area Ans where a coordinate detection sensor is not arranged is provided between the effective sensor area Ls and input operation surface frame 6E and the sensor nonsetting area Ans is so determined that when a finger that the user slides on the input operation surface 7E is stopped by the input operation surface frame 6E, a sensor provided at the end part of the input operation surface 7E detects the presence of the finger and generates a coordinate signal. Namely, the internal peripheral edge of the input operation surface frame 6E is determined at a specific distance G from the external periphery of the effective sensor area Ls.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a pointing device, and more particularly to a flat input device used as a pointing device of an information processing apparatus such as a computer.

[0002]

2. Description of the Related Art In recent years, personal computers, especially notebook-type portable personal computers (hereinafter referred to as notebook-type personal computers).
, Flat input devices that are operated by a user touching the surface thereof are widely used as pointing devices.

[0003] The structure of such a conventional flat input device will be described with reference to FIGS. 11, 12, 13 and 14. First, as shown in FIG. 11, a conventional flat input device TSPc is roughly divided into a circuit board 101 having a coordinate detection sensor (not shown) on one side and a topsheet 1.
02. The flat input device TSPc is a circuit board 1
01 is provided on the side where the coordinate detection sensor surface is provided.
2 are superposed.

As shown in FIG. 12, a flat input device TS
Pc is the input operation surface frame 1 surrounding the periphery of the topsheet 102.
05. Note that the inside of the top sheet 102 surrounded by the input operation surface frame 105 is the input operation surface 104 operated by the user. In such a state, the flat input device TSPc is often used by being attached to a front surface of a notebook personal computer (not shown).

When the user touches the surface of the top sheet 102, that is, the input operation surface 104, with a finger, the coordinate detection sensor is pressed, and the coordinates indicating the position where the circuit board 101 is pressed are detected. To move the cursor on the screen of the notebook personal computer using this flat input device, place a finger on the input operation surface 104 and slide the finger as it is in the desired direction. Circuit board 101
Outputs the coordinates of the position where the finger is first placed on the coordinate detection sensor. Then, the coordinates of the position where the finger is moved are sequentially detected, and the CPU of the notebook personal computer is detected.
Send a signal to Based on this signal, the CPU moves the position of the cursor displayed on the display unit of the notebook personal computer in accordance with the movement of the finger.

The flat-type input device TSPc has a function of moving a cursor displayed on the display unit and a function of designating absolute coordinates on the input operation surface 104. Using this absolute coordinate designation function, input operation surface 1
A flat-type input device capable of assigning various functions to an absolute coordinate designation area on the input device 04 (hereinafter, referred to as “function-assigned flat-type input device”) has been developed. In this function assignment type flat input device, a user can select a specific function from a plurality of functions or set a function arbitrarily and assign it to an arbitrary position on the input operation surface 104. The portion on the input operation surface 104 to which such a specific function is assigned is called a function area.

In FIG. 12, a first function area 106 and a second function area 10 provided on an input operation surface 104 are provided.
7 is indicated by a dotted line. First functional area 1 in upper left corner
When the finger touches 06, the circuit board 101 detects the absolute coordinates of the contact point and sends a coordinate signal to the CPU of the notebook personal computer. The CPU determines whether the sent coordinate signal is a cursor movement command or an assignment function execution command. If the CPU determines that the command is the execution command of the assignment function, the CPU executes the function assigned to the absolute coordinates in advance, and displays the result on the display unit of the notebook personal computer.

If the function assigned to the first function area 106 is, for example, an ENTER key input function, touching the first function area 106 with a finger causes the user to press the ENTER key provided on the keyboard. The same instruction is executed. In other words, EN during operation of the flat input device
Even when it is necessary to press the TER key, simply moving the finger on the input operation surface 104 of the flat-panel input device causes ENT to be pressed.
This is convenient because the same input operation as pressing the ER key can be performed. Similarly, for example, if a vertical scroll function is assigned to the second functional area 107, a vertical scroll can be realized by touching the second functional area 107 with a finger and sliding the finger up and down.

[0009]

SUMMARY OF THE INVENTION For convenience of explanation,
In FIG. 12, the function area is clearly indicated by a dotted line, but the function area is not specifically displayed on the input operation surface 104 of the actual flat input device TSPc. For this,
There are inconveniences described below when the user uses the provided functions.

(1) Since the position of the function area is not known exactly, it is difficult for the user to correctly touch the function area corresponding to the desired assignment function. That is, the user touches the periphery of the desired functional area by mistake. As a result, the flat input device determines that, for example, the movement of the cursor has been instructed, and the user cannot execute the desired function.

(2) As the number of functional areas increases, the number of undesired functional areas often increases. In order to avoid such a situation, the function area functions can be assigned at most to only the four corners on the input operation surface.

(3) The contents of the functions assigned to each of the function areas are not known.

(4) Although the entire surface of the topsheet can be used as the input operation surface, the area of the input operation surface is reduced by surrounding the periphery of the topsheet with the input operation surface frame. As a result, components that can be attached to notebook personal computers that require
Despite the need to minimize the waste of volume and effective area, wasteful areas and volumes cannot be used by users.

(5) As shown in FIG.
When touching the input operation surface 104 with the
, The finger F can touch only an area inside a position away from the input operation surface frame 105 by a distance G. That is, as shown in FIG.
04 cannot touch the entire surface of the input operation surface frame 105.
Can be touched only on the inner accessible area AOe which is separated by a distance G from the inner circumference of the area. Accessible area AOe and input operation surface frame 105
Is an operation-impossible area AOn in which the user cannot operate despite the provision of the sensor S. In a notebook personal computer, the inoperable area AOn wastes area and volume wastefully, and reduces the effective operation area of the flat input device.

(6) In a flat input device which is made small for mounting on a notebook type personal computer, a resolution corresponding to a high resolution of a display is provided on an input operation surface having a smaller area. There is a need for a discriminating ability of the coordinates. However, the effective operation area of the input operation surface, which originally has only a small operation area, is further reduced due to the above-described items (4) and (5). As a result, it is more difficult for the user to touch the input operation surface and input correctly. Further, the problems described in the above items (2) and (3) become even more serious.

The present invention has been made to solve the above-mentioned conventional problems, and has a function of activating a specific function by designating an absolute coordinate area, and a flat-type input device capable of understanding and operating the operation more accurately and intuitively. The purpose is to provide.

Means for Solving the Problems and Effects of the Invention

According to a first aspect of the present invention, when a pointing unit is moved on a flat input surface, a plane operating unit for generating an input signal representing information of a contact point between the pointing unit and the input surface; An input operation frame provided so as to cover the indication unit with a predetermined gap and defining a maximum movement range of the indicating unit, wherein the predetermined gap is such that the indicating unit is moved by the input operation frame. Is determined such that the contact point is located on the outer edge of the input surface even when is restricted.

As described above, in the first aspect, the input can be performed by tracing the input surface with a finger or the like while being guided by the input operation frame.

According to a second aspect, in the first aspect, the gap is determined by a curvature of the pointing portion with respect to the input surface and a height of the input frame from the input surface.

As described above, in the second aspect, the gap can be appropriately determined according to the size of the finger or the like and the input frame.

According to a third aspect, in the second aspect, the pointing portion is a finger.

According to a fourth aspect, in the second aspect, when the input surface is formed in a polygonal shape defined by a plurality of sides, the gap is minimum at the center of the side, and It is characterized in that it becomes larger as it gets farther away from it, and becomes maximum at a corner formed by an adjacent side.

In a fifth aspect based on the first aspect, a function area to which a specific function is assigned is provided on the input surface, and if an input is given to the function area by an instruction section, the plane operation section is switched to the specific operation section. A function execution instruction signal for instructing execution of a function is generated.

In a sixth aspect based on the fifth aspect, the sign indicating the content of the specific function assigned to the functional area is:
It is provided on the functional area.

As described above, in the sixth aspect, the sign allows the user to know the position of the function area on the input operation surface or the contents of the function assigned to the function area.

In a seventh aspect based on the fifth aspect, the sign indicating the content of the specific function assigned to the functional area is:
It is provided on the input operation frame.

As described above, in the seventh invention, the same effects as in the sixth invention can be obtained.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 10, an example in which a flat input device according to an embodiment of the present invention is applied to a notebook personal computer will be described.
The flat input device according to the present embodiment has been devised to achieve the above-described object.

FIG. 1 shows a notebook personal computer equipped with a flat input device according to an embodiment of the present invention. Notebook type personal computer N
The BPC includes a personal computer main unit 1, a display unit 2, a display screen 3, a keyboard 4, a flat input device TSP1 according to the present embodiment, a left click button 8 and a right click button 9. The flat input device TSP1 is provided in front of the keyboard 4, and a portion surrounded by an input operation surface frame 6 is an input operation surface 7.

FIG. 2 shows the flat input device TS shown in FIG.
2 shows a II-II cross section of P1. As shown in the drawing, the flat input device TSP1 includes a circuit board 10, a coordinate detection sensor 1
1. The topsheet 12 is held by a housing 13 of the personal computer main unit 1 as shown in the figure. The flat input device TSP1 is a topsheet 12, a coordinate detection sensor 1
1 is laminated on a circuit board 10, has a flat input operation surface 7 of several centimeters square, and is embedded in a notch provided in a housing of the personal computer main body 1.

The input operation surface 7 is surrounded by an input operation surface frame 6, and the surface of the input operation surface 7 is covered with a top sheet 12. The topsheet 12 is an opaque film with a good touch, which protects the coordinate detection sensor 11 and prevents the inside from being seen through. The coordinate detection sensor 11 used in the present embodiment is preferably a capacitance-type tablet, but may employ another type such as a pressure-sensitive type.

FIG. 3 shows a configuration of an electronic circuit of the flat input device TSP1. 1024 rows x
A coordinate detection sensor is arranged in each section defined by 768 rows. When a finger is placed on the coordinate detection sensor 11 via the top sheet 12, the capacitance of the portion where the finger is placed is reduced. Therefore, the change in the capacitance is converted into a change in the current value to place the finger. The position of the cut portion is detected.

That is, the coordinate position of the portion where the finger contacts the coordinate detection sensor 11 via the topsheet 12 is detected by the detection unit 1.
4 detects a crossing point between the horizontal scanning line and the vertical scanning line and generates a coordinate signal Sc. The coordinate signal Sc is sent to the CPU (not shown) of the personal computer main unit 1 via the interface unit 15 and the I / O unit (not shown).
Is output to

The coordinate signal Sc sent from the circuit board 10
Is a signal representing the absolute coordinate position designated by the finger. CPU
Determines whether the coordinate signal Sc instructs movement of the cursor on the display screen or instructs execution of a function assigned to a specific function area. And C
The PU executes the instruction corresponding to the determination, and displays the result on the display screen 3.

In the following, referring to the front views of the flat input device TSP1 shown in FIGS. 4, 5, 6, 7, and 8, signs indicating specific functional areas on the coordinate detecting sensor 11 will be described. Alternatively, various examples of the sign indicating the content of the function assigned to the function area will be described.

First, in FIG. 4, circles 17a, 17
b, 17c and 17d and arrows 18a and 18b
Is a sign provided on the input operation surface 7A of the flat input device TSP1. The signs 17a-17d and 18a and 18b are preferably printed on the topsheet 12A, but may be engraved or embossed as long as they can be easily recognized by the user and do not hinder the operation. good. That is, if unevenness is provided on the surface of the topsheet 12A so that the user can confirm the position with his finger, the user can perform a blind touch input.

In FIG. 4, for example, a circle 17a at the upper left corner
When a finger is touched, the same command as when the ENTER key is pressed is executed. Circle 17b in upper right corner, circle 1 in lower left corner
7c and the circle 17d at the lower right corner are also assigned the function of the ENTER key similarly to the circle 17a. Such a function is called a launcher function.

The arrow 18a on the right side is a sign indicating the position of the up / down scroll function and the up / down scroll function. The user can know both the contents of the function and the position where the function is assigned by the arrow. If the user understands the meaning of the right-side arrow 18a, it is easy to recognize that the lower-side arrow 18b is a left-right scroll function without any further explanation. As is clear from the comparison with the example of the flat input device TSPc shown in FIG. 12, in the flat input device TSP1 according to the present invention, the user can accurately, based on the sign displayed on the top sheet 12A,
Input operation can be performed quickly.

Next, FIG. 5 shows an example in which eight concave markers are provided inside the input operation surface frame 6B. Input operation surface frame 6B
At the four corners are 3/4 circular notches 19a, 19b, 1
9c and 19d are provided as markers for the functional area. Then, on the four inner sides of the input operation surface frame 6B,
Semicircular notches 20T, 20R, 20L, and 20
B is provided as a marker for the functional area.

The user can know the position of the functional area by using these concave markers by tracing the periphery of the inner peripheral side of the input operation surface frame 6B with a finger. Signs 19a, 19
b, 19c, 19d, 20T, 20R, 20L, and 20B, stop the finger at the sign indicating the function area to which the desired function is assigned, and slide the finger to lightly press the input operation surface 7B. It is possible to input a desired function execution command accurately and quickly. Of course, also in this embodiment, as described with reference to FIG. 4, if the sign printed on the top sheet 12 is provided along with the concave sign, the operability is further improved.

FIG. 6 shows the markers 19a and 19 shown in FIG.
Modified examples of b, 19c, and 19d are shown. In the same example,
3 of the markers 19a, 19b, 19c and 19d shown in FIG.
The ４ circular notch shape is devised to facilitate user operability. In this example, the input operation surface frame 6
The inner periphery of C is formed in a gentle convex curved shape with respect to the input operation surface 7.

A semicircular notch 21a is provided at the upper left corner, for example, of the four corners defined by these curved four sides. Unlike the example shown in FIG. 5, the marker 21a is not a 3/4 circle but a semicircle. Further, the semicircular end is smoothly joined to the side 22 of the input operation surface frame 6C having a gentle convex curve with respect to the input operation surface 7.

As a result, unlike the example shown in FIG. 4, the input operation surface frame 6C has no corners on the inner peripheral surface side (especially at the corners), and is formed as a smooth continuous line as a whole. The user can easily follow the inner peripheral portion of the input operation surface frame 6C thus formed with his / her finger. In addition, there is no corner at the time of the normal cursor movement operation, so that there is no uncomfortable feeling in the operation of sliding the finger.

FIG. 7 shows an example in which markers indicating functional areas on the input operation surface 7 are provided in a concave or convex shape at corresponding positions on the input operation surface frame 6D. These signs 24
The sheets on which a, 24b, 25a, and 25b are printed may be attached to the upper surface of the input operation surface frame 6D.

FIG. 8 shows the input operation surface frame 6A shown in FIG.
Markers 17a, 17b, 17c provided at the four inner corners of
17d and 17d and an example in which a grid portion 26 is provided on the entire surface of the topsheet 12. In this example, the scroll function of two sides in the example shown in FIG.

In order to use the function of the grid section 26, first, for example, one of the markers 17a to 17d is touched to specify a corresponding launcher function area. Then, on the display screen 3 of the notebook personal computer, an icon in which the function of the application program is symbolized by a pattern or the like is displayed. The icon displayed at this time is
It is set in advance so as to match the lattice arrangement of the lattice part 26.

In this example, the icons are arranged on a 3 column × 3 row basis. If the desired icon is in the third column and the second row while looking at the display screen 3, if the corresponding area 28 on the flat input device TSP1 is touched with a finger, the icon on the flat input device TSP1 is previously displayed. If the correspondence between the area and the icon on the display screen 3 is registered, a desired application program can be started.

The method of registering an application program corresponding to an icon and activating the registered application program by operating the icon is the same as the method disclosed in Japanese Patent Application No. 10-244880. is there. According to this example, the flat input device TS is independent of the display size of the icons on the display screen 3.
The icon can be quickly selected by the grid portion 26 on P1.

FIG. 9 shows an example in which the input operation surface frame 6E is formed by a curve. In the figure, the dotted line Ls indicates the circuit board 1
An effective sensor area indicating an area where the 0 coordinate detection sensor 11 can output a coordinate signal by a user operation is shown. Further, the dotted line Lf indicates the outer shape of the top sheet 12 provided so as to cover the input surface of the coordinate detection sensor 11 of the circuit board 10.

As described above, in the present example, the inner periphery of the input operation surface frame 6E is formed by a curve that is convex inward with respect to the input operation surface 7E and a curve whose corners are convex outward. Thus, the inner periphery of the input operation surface frame 6E is located outside the effective sensor area Ls. That is, between the effective sensor area Ls and the input operation surface frame 6E, the sensor non-installation area Ans in which the coordinate detection sensor is not arranged is provided. this is,
Since the movement of the user's finger is limited by the input operation surface frame described with reference to FIG. 12, the effective operation surface area that the user can actually touch is limited, and a part of the input operation surface is wasted. It is to eliminate the situation.

That is, in the sensor non-provided area Ans, the finger sliding by the user on the input operation surface 7E is input to the input operation surface frame 6E.
Is stopped, the sensor provided at the end of the input operation surface 7E is determined so as to detect the presence of the user's finger and generate a coordinate signal. In other words, the inner peripheral edge of the input operation surface frame 6E is positioned with respect to the outer edge of the effective sensor area Ls.
It is determined to be separated by a predetermined distance G. This separation distance is referred to as a gap G.

In each of the four sides on the inner peripheral side of the input operation surface frame 6E (hereinafter, abbreviated as "input operation surface frame 6E"), the input operation surface frame 6E is approximately a predetermined distance GL from the effective sensor area Ls. It only needs to be separated. The separation distance at the four sides is referred to as a side gap GL. However, in each of the four corners of the input operation surface frame 6E, the gap G becomes closer to the vertex (corner) where the two sides intersect.
Need to be bigger.

In order for the sensor located at the corner of the effective sensor area Ls to detect the user's finger, the gap G takes the maximum value GC. The gap G with respect to the corner of the effective sensor area Ls is referred to as a corner gap GC. That is, even if the finger is to be moved to the functional area 31 at the corner, the input operation surface frame 6 located at a position higher than the input operation surface 7E.
The two side walls of E catch the finger, and it is difficult to push the fingertip to the corner. Therefore, in order to reliably specify the position of the functional area 31 at the corner, the inner peripheral corner of the input operation surface frame 6E has a bulge.

As described above, the input operation surface frame 6E has an inner peripheral portion formed by a smooth continuous line which is at least separated from the effective sensor area Ls by the side gap GL and separated by at most the corner gap GC. . An area where no sensor is provided between the inner periphery of the input operation surface frame 6E and the effective sensor area Ls is an unsensored area Ans. That is, the inner peripheral shapes of the sensor non-installation area Ans and the input operation surface frame 6E are the shape of the effective sensor region Ls, the shape of the user's finger, and the height and side surface of the input operation surface frame 6E from the input operation surface 7E. It is appropriately determined according to the shape.

In addition, the center of the four sides has only one side of the wall for preventing the intrusion of the finger with respect to the four corners. Therefore, in the portion along the side, the sensor non-installation area Ans may be basically small. Further, as described with reference to FIG. 6, in order to smooth the movement of the finger, the four sides are formed to have an inwardly convex shape.

Of course, the allowable range of the sensor non-installation area Ans varies depending on the height of the wall of the input operation surface frame 6E, the thickness of the finger, the sensitivity of the coordinate detection sensor, and the like. It is necessary. FIG.
In the example shown in FIG. 5, the same operation range as when a conventional coordinate detection sensor that is substantially larger is used. Therefore, the position of the functional area 31 arranged at the corner can be reliably specified. Also, the input operation surface 7E surrounded by the rounded frame does not catch a fingertip on a corner even in a normal cursor movement operation.

The present invention is not limited to the above-mentioned sign, but it is also possible to notify the sign by voice, for example. For example, if a pressure-sensitive sensor is attached to a predetermined position of the input operation surface frame, a voice notification is issued when a finger touches a specified position. In addition, a liquid crystal panel can be provided on the front surface instead of the topsheet. In this case, since the sign can be displayed on the liquid crystal screen, the sign can be changed in accordance with the setting of the flat-type input device, so that the usability of the user is further improved.

If the sensor area of the circuit board 10 is sufficiently large and the resolution is sufficient for the requirements, the sensor non-installation area Ans is reduced or eliminated, and a part of the input operation surface frame 6E is effective. It may be located on the sensor area Ls.

As described above, in the embodiment of the present invention, the user can tactilely or visually recognize the functional area on the input operation surface by the unevenness provided on the input operation surface frame or the sign such as a printed design. It is possible to know exactly, and it is easy to specify the functional area with a fingertip.

Further, by providing a sign indicating the function content of the function area on the input operation surface frame, designation of the function area is easy, and there is an effect that erroneous input is reduced. Further, since the functional area can be accurately recognized, the number of the functional areas can be increased, and the input efficiency can be improved.

Further, by forming the mark on the unevenness formed on the input operation surface frame or the printed matter, the function area or the function content of the function area can be recognized by the fingertip, so that the blind touch is easy. Further, in contrast to the method of printing a sign on the top sheet, the input operation surface can be made plain, so that there is no sense of incongruity at the time of a normal cursor movement operation.

By providing a sensor-free area where no coordinate detection sensor is disposed between the coordinate detection sensor section and the inner peripheral portion of the input operation surface frame, designation of a functional area at a corner is facilitated. . Further, the input operation surface can be used efficiently because it can be used as a function designation area up to the effective limit of the coordinate detection sensor.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a notebook personal computer incorporating a flat input device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of the flat input device shown in FIG.

FIG. 3 is a block diagram illustrating a configuration of an electronic circuit of the flat input device illustrated in FIG. 1;

FIG. 4 is an explanatory diagram showing a first example of a sign provided on the flat input device according to the embodiment of the present invention;

FIG. 5 is an explanatory diagram showing a second example of a marker provided on the flat input device according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a third example of a marker provided on the flat input device according to the embodiment of the present invention;

FIG. 7 is an explanatory diagram showing a fourth example of a marker provided on the flat input device according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a fifth example of a marker provided on the flat input device according to the embodiment of the present invention.

FIG. 9 is an explanatory diagram showing a modification of the input operation surface frame provided in the flat input device according to the embodiment of the present invention.

10 is a cross-sectional view of the flat-type input device shown in FIG. 9, taken along line XX.

FIG. 11 is an exploded perspective view showing the structure of a conventional flat input device.

FIG. 12 is a front view showing an input operation surface of a conventional flat input device.

FIG. 13 is an explanatory diagram illustrating a state in which an input operation surface of a conventional flat input device is operated with a finger.

FIG. 14 is a front view showing an effective operation area in which the input operation surface of the conventional flat input device shown in FIG. 12 can be operated with a finger;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Personal computer main body 2 Display part 3 Display screen 4 Keyboard 6, 6A, 6C, 6D, 6E Input operation surface frame 7, 7A, 7B, 7E Input operation surface 8 Left click button 9 Right click button 10 Circuit board 11 Coordinate detection sensor 12, 12A, 12E Topsheet 13 Case 14 Detector 15 Interface 17a, 17b, 17d, 17e Circle 18a, 18b Arrows 19a, 19b, 19c, 19d Notch 20L, 20R, 20T, 20B Notch 21a Mark 22 Sides 24a, 24b Signs 25a, 25b Signs 26 Lattice 28 Area 31 Function Area 101 Circuit Board 102 Surface Sheet 104 Input Operation Surface 105 Input Operation Surface Frame 106 First Function Area 107 Second Function Area NBPC Notebook Type Personal Computer TSP1 Flat type Device Ans sensor non installation zone AOn inoperable region F finger G gap GL sides contour Ls effective sensor region TSPc flat input device S sensor gap GC corner gap Lf topsheet

Claims (7)

[Claims] A plane operation unit that generates an input signal representing information on a contact point between the pointing means and the input surface when the pointing means is moved on a planar input surface; An input operation frame provided so as to cover the input means with a gap, and an input operation frame defining a maximum movement range of the instruction means, wherein the predetermined gap is defined by the input operation frame The flat-type input device, characterized in that the contact point is determined to be on the outer edge of the input surface even when the movement is restricted by the following. 2. The flat input device according to claim 1, wherein the gap is determined by a curvature of the pointing device with respect to the input surface and a height of the input frame from the input surface. 3. The flat input device according to claim 2, wherein said indicating means is a finger. 4. When the input surface is configured in a polygonal shape defined by a plurality of sides, the gap is minimum at the center of the side, and increases as the distance from the side increases; The flat input device according to claim 2, wherein the maximum value is obtained at a corner formed by the adjacent sides. 5. A function area to which a specific function is assigned is provided on the input surface, and when there is an input from the instruction means in the function area, the plane operation unit instructs execution of the specific function. 2. The flat input device according to claim 1, wherein the flat input device generates a function execution instruction signal. 6. The flat input device according to claim 5, wherein a sign indicating the content of a specific function assigned to the function area is provided on the function area. 7. The flat-type input device according to claim 5, wherein a sign indicating the content of a specific function assigned to the function area is provided on the input operation frame.