JPS61148523A - Coordinate inputting device - Google Patents

Abstract

PURPOSE:To obtain a coordinate inputting device having the high reliability by providing a pair of deflection angle detectors for detecting the deflection angle of a pressure point on both right and left ends of both sides of a face plate, also providing a pair of elevation angle detectors for detecting the elevation angle of the pressed point on upper and lower both ends of both sides of the face plate, and executing the correction of an input coordinate position. CONSTITUTION:A titled devices is constituted of the face plate 1, a pressure detector 2 provided on four corners of the rear side, a pair of deflection angle detectors 3 provided on right and left both ends of the face sides of the face plate 1, and a pair of elevation angle detectors 4 provided on the upper and lower both ends of the face sides of the face plate, etc. In case when the face plate 1 is pressed from a diago nal direction, an electric signal corresponding to the (z) component Fz of a pressing force F is outputted from the usual pressure detector 2, and also an electric signal corresponding to the magnitude of pressing force components Fx, Fy is outputted from the deflection angle detector 3 and the elevation angle detector 4. In such a way, the deflection angle alpha, and the elevation angle beta are calculated, errors DELTAx, DELTAy of each coordinate are obtained and corrected, and a true coordinate is calculated and inputted.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is used to input position information, items displayed on a panel, handwritten characters, figures, etc. into electronic devices such as word processors and personal computers. I
! ! The present invention relates to a standard input device, and more specifically, is designed to improve the reliability of such a PI input device.

[Conventional technology]

In recent years, personal computers such as Word Processor V have become widespread in everyday life, and keyboards are widely used to input data and the like. This keyboard has a large number of keys on which various characters are displayed, and the operator inputs data by pressing the keys.

However, the keys on this keyboard are not arranged regularly in the usual 50 sounds @, etc., but in the
Since they are arranged according to the two-hand rule, a certain degree of skill is required to operate them, and it is impossible to input figures and the like.

Therefore, in order to make the operation easier even for beginners, we created the coordinate input 1iffi!, which allows you to read and input characters written by the hand of the cabinet, as well as input figures, etc. is proposed. This coordinate input device has a face plate on the front side of the CRT with pressure detectors installed at the top, bottom, left and right corners of the back side, and when characters, figures, etc. are drawn on the face plate, the characters, figures, etc. Accordingly, an output signal is output to each pressure detector to detect the coordinate position of the pressed point on the face plate, and the data such as characters and figures is inputted into a personal computer or the like.

By the way, in this coordinate input device, as shown in FIG. 5, there is usually enough space between the face plate a on which characters, figures, etc. are drawn and the CRT b to accommodate the deviation and movement when the face plate a is pressed. A certain amount of @IIL is provided in order to secure space for the pressure sensor and to also secure space for arranging the pressure detector.

[Trying to solve @Target]

However, with this type of coordinate input device, when trying to select the appropriate data from among several pieces of data displayed on the CRTbii screen (hereinafter referred to as menu selection), the following steps are required: A situation like this may occur. That is, when selecting a menu, the operator
The eye position is on the same horizontal plane with respect to the j-plane, and the CRT
b There is no problem when pressing and operating the face plate a from a direction perpendicular to the screen, but if the eye position is above the CRTbi surface,
Or, if your eyes are located below, or even if your eyes are horizontal to the CRTb screen, they are located to the left or right of the CRTb screen and you press or operate faceplate a from an angle, the thickness D of faceplate a will change.
and 11L, the coordinates R of the target position (hereinafter referred to as true coordinates) and the position mW (hereinafter referred to as incorrect coordinates) are pressed and input, and as a result, the data that you were trying to select is In some cases, adjacent data etc. that are interesting are selected.

The purpose of this invention is to detect the direction of the pressing force and correct the error even if the user presses or operates the wrong coordinates because the eye position is off the CR7 screen when selecting a menu on the CRTj screen. It is an object of the present invention to provide a highly reliable coordinate input device capable of correcting coordinates and selecting correct data.

(Means and effects for solving the problem) That is, the present invention provides a coordinate input device in which a face plate is provided on the front side of a CRT and data such as characters and figures are input by pressing the face plate. A pair of declination angle detectors for detecting the declination angle of the pressing point are provided on both end surfaces, and a pair of elevation angle detectors for detecting the elevation angle of the pressing point are provided on both the upper and lower end surfaces of the face plate,
This system is designed to correct the input coordinate position, and if the operator's eye position is, for example, diagonally below the face plate, the face plate is pushed diagonally upward and erroneously deviates from the true coordinate position. When the coordinate position is pressed, the above-mentioned incorrect coordinate position 1
The pressure detector detects the erroneous coordinate position from the component (hereinafter referred to as two components) acting perpendicularly to the face plate of the pressing force applied by the all! ! - In order to detect and correct the distance between the position and the true coordinate position (hereinafter referred to as error), the declination angle detector and the elevation angle detector detect the horizontal component of the pressing force (hereinafter referred to as the X component) and the By detecting the vertical component of the pressure (hereinafter referred to as the y component), the angle of deviation of the pressing force is determined, and based on these, incorrect seating is corrected from the gap between the face plate and the CRT, etc. Since the true coordinates can be obtained reliably and accurately, the operator can select the correct item he or she is aiming for even if the face plate is stamped or operated from an oblique direction, especially when selecting a menu. It is.

(Example) A drawing of an example of this invention! I will explain it while referring to it.

FIG. 1 shows a coordinate input device according to the present invention. This coordinate input device includes a face plate 1 provided on the front side of a CRT (not shown) and four corners on the back side of this face @1. A pressure detector 2 provided therein, a pair of declination angle detectors 3 provided on both left and right end surfaces of this face plate 1, and a pair of elevation angle detectors 4 provided on both upper and lower end surfaces of this WJ pivot i, etc. It is configured.

The face plate 1 is erected together with the CRT, and characters, figures, etc. can be drawn and input on the face plate 1. The face plate 1 of this embodiment has an origin O at the lower left corner of the surface. Therefore, the lower edge 1a and left edge 1b of the surface of the face plate 1 are respectively
It constitutes the axis and the V axis. In this example,
Although the configuration is such that the surface @1 is installed vertically together with the CRT, the present invention is not limited to this, and of course, a configuration in which the surface @1 is installed horizontally together with the CRT is also possible.

The pressure detector 2 uses a strain gauge, a piezoelectric element, or the like, and outputs an electric signal from the pressing force F applied to the face plate 1 when drawing characters, figures, etc. This pressure detector 2 is designed to detect two components of the force FZ among the pressing forces acting on the face plate 1 and output an electric signal corresponding to the magnitude thereof (see Fig. 2). .

The declination detector 3 is similar to the pressure detector 2, and is particularly sensitive to the X component of the pressing force Y that acts on the face plate 1 when drawing characters, figures, etc. on the face plate 1. Force F,
is detected and outputs an electrical signal depending on its size. (See Figure 2). Based on the magnitude of the electrical signals detected by the pair of left and right declination angle detectors 3,
The deflection angle α (hereinafter referred to as deflection angle) of the pressing force F pressed against the face plate 1 on the horizontal plane (X-Z plane) is calculated.

By the way, the true coordinates R (A, B) and the erroneous coordinates W (C.

In order to correct the dark error with D), this argument α is expressed using the X and Z components FX and FZ of the pressing force F, tan a-FX, /FZ ...-" (A)
becomes. Therefore, in FIG. 3, the true coordinate R and the erroneous coordinate W
The error ΔX for the X component between the face plate 1 and the CRT
A relational expression using the distance S from 5 and the argument α (hereinafter, xl!
i standard correction standard), Δx-8・tanα...
...It can be obtained from (b), and from (a), Δx −8−Fx /Fz becomes the Ill difference of the X component to be corrected.

The elevation detector 4 is similar to the pressure detector 2, and detects especially the y-component of the pressing force F that acts on the face plate 1 when drawing characters, figures, etc. on the face plate 1. Fy
is detected and outputs an electrical signal depending on its magnitude (see Figure 2). Then, from the magnitude of the electric signal output to the pair of upper and lower elevation angle detectors 4, the angle β of the deviation of the pressing force F pressed against the face plate 1 in the vertical plane (y-z plane) ) is now calculated.

By the way, in Fig. 2, in order to correct the difference between Kosan [R (A, B) and Primeval IW (C, D), this elevation angle β is expressed as y of pressing force F, and l components Fy, Fz are When expressed using tan β-Fy, /Fz (c). Therefore, in FIG. 4, the error Δy for the y component between the true coordinates R and the primeval IW is expressed by the following relational expression (hereinafter,
(referred to as y-coordinate correction formula) Δy-8-tanβ...
...It can be obtained from (d), and from (c), Δy −8−f−y , /Fz becomes the error of the y component to be corrected.

Therefore, when the coordinate input device according to this embodiment is used, when a pressing force is acting perpendicularly to the face plate 1, the position coordinate of the pressed point is detected by the ordinary pressure detectors 2 provided at the four corners of the face plate 1. is detected, and since the elevation angle detector 3 and the elevation angle detector 4 do not output electrical signals, these are input as they are as true coordinates.

Further, when the surface @1 is pressed from an oblique direction, an electric signal corresponding to the Z component Fz of the pressing force F is outputted from the normal pressure detector 2, and an electric signal corresponding to the Z component Fz of the pressing force F is outputted, and the declination angle detector 3 and the elevation angle detection Is
4 to the respective pressing force components Fx.

An electrical signal corresponding to the magnitude of Fy is output. As a result, the declination angle a and the elevation angle β are determined, and these declination angle α and elevation angle β
Using x, y! am correction formula, i.e. Δx-8-
From tancr ΔV-8-tanβ, the errors ΔX and Δy of each coordinate are calculated and corrected,
The true coordinates are determined and input.

In this way, even if the operator intends to press the true coordinate R and presses the wrong coordinate at a different position due to a difference in the position of the operator's eyes, this coordinate input device will reliably correct the error, so the menu When making a selection, there is no possibility that something different from what you have selected will be input.

(Effects) As described above, if the coordinate input device according to the present invention is used, even if the face plate is pressed from an oblique direction,
Since the correction is reliably performed by the declination angle detector, the elevation angle detector, etc. provided on the upper, lower, left and right end surfaces of the face plate, coordinate input can be performed accurately. In particular, when selecting a menu, it is possible to prevent the user from mistakenly selecting and inputting an item that is different from his/her own selection, which is a remarkable effect.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing the coordinate input device according to the present invention, FIG. 2 is an explanatory diagram showing the pressing force acting on the face plate according to the present invention, and No. 38 shows the relationship between the declination angle and the error Δ×. 14 is a schematic side view showing the relationship between the elevation angle and the error Δy, and FIG. 5 is a schematic side view showing a conventional coordinate input device. 1... Face plate, 2... Pressure detector, 3... Declination angle detector, 4... Elevation angle detector, 5... CRT, α...
・Declination angle, β... Elevation angle, Applicant NEC Home Electronics Co., Ltd. Agent Patent Attorney Masu 1) Bamboo □Huo Figure 1 Figure 3 Figure 5 vJ

Claims (1)

[Claims] 1. In a coordinate input device in which a face plate is provided on the front side of a CRT and character/graphic data is input by pressing the face plate, declination angle detection of a pressed point is provided on both left and right end faces of the face plate. A coordinate input device comprising: a pair of declination angle detectors for detecting the elevation angle of the pressed point; and a pair of elevation angle detectors for detecting the elevation angle of the pressed point on both upper and lower end surfaces of the face plate, and correcting the input coordinate position. .