JPH04127314A - Touch position discriminating method for touch panel - Google Patents

Abstract

PURPOSE:To prevent a malfunction by making its operation effective, when only one touch position is touched, as a result of executing a retrieval twice. CONSTITUTION:When a touch is detected continuously twice with regard to one of plural touch positions on a touch panel, its touch position is informed as a selected position. Accordingly, only in the case only one of plural touch positions is touched, its touch becomes effective. That is, in the case (a) the touch positions of two parts or more are touched, and in the case (b) the touch position is shifted, the result of detection is not informed. In such a manner, the malfunction is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for determining a touch position in various devices having a touch panel.

(Prior Art) A touch panel is provided on the screen of a display device such as a CRT. This touch panel allows the operator to perform manual operations according to the display on the display device. Such a touch panel is configured, for example, by arranging transparent electrodes in a grid on a transparent plate.

FIG. 4 is a front view of the touch panel.

As shown in the figure, a plurality of touch positions are provided by X coordinates X1 to X, and X coordinates Yt to Y.

In the conventional touch panel touch position determination method, the coordinates of the smallest unit on the touch panel are sequentially searched, and the first coordinate discovered is recognized as data. The search order may be in any order, but for example, (xi, y+
), (x2. y,) , ... (x,,, Y,),
(xi, Y2), (X2. Y2), .'', etc. in a certain order.

FIG. 2 is a flowchart showing the steps of a conventional touch position determination method.

As mentioned above, the touch positions are sequentially searched,
If the corresponding coordinates are touched (step 521)
, and notifies that effect (step 524). If the checked coordinates are not detected even after all the coordinates have been checked (step 522), no notification is made (Stella:
523).

(Problems to be Solved by the Invention) However, the above-mentioned conventional technology has the following problems.

FIG. 3 is an explanatory diagram 1 of the operation status of the touch panel.

As shown in FIG. 3(a), if the user presses the left end of this coordinate ■ while pressing the coordinate C to be selected, there is a possibility that the adjacent coordinate ■ will be recognized as data. In other words,
(L, Yl), (L, Yl), ・(Xn, Yl),
If you search for the coordinates in the order of (X,, Yl), (Xa, Yl), -0'-, then if you follow the method shown in Figure 2, the coordinates ■
There was a gap in which information was recognized as data.

Further, as shown in FIG. 3(b), if the finger moves a little during the touch, two pieces of data will appear consecutively. In other words, if the finger shifts from the position shown by the broken line in FIG. 3(b) to the position shown by the solid line, according to the method shown in FIG.
There was a problem in that the coordinates ■ were notified first, followed by the coordinates ■.

Furthermore, there is a problem in that there is no measure to prevent malfunctions when the device has some unstable factors (for example, noise generation, etc.).

The present invention has been made in view of the above points, and an object of the present invention is to eliminate the occurrence of erroneous input of touch panel data that is not intended by the user, and to provide a device with excellent operability.

(Means for Solving the Problems) A touch position determination method for a touch panel of the present invention includes:
Multiple touch positions are defined on the touch panel, and it is determined multiple times whether or not each touch position has been touched. If a touch at only one touch position is detected two or more times in a row, that touch is detected. The feature is that the position is notified as a selected position.

(Function) In the touch panel touch position determination method of the present invention, one of a plurality of touch positions on the touch panel
When a touch is detected twice in succession for one touch position, the touch position is notified as the selected position. Therefore, only when only one of the plurality of touch positions is touched, that touch is considered valid. This makes it possible to prevent erroneous operations.

(Example) FIG. 1 is a flowchart showing the procedure of the method of the present invention, and FIG. 5 is a diagram showing an example of control information according to the present invention.

When the touch position search starts at a predetermined interval (for example, 100m5ec), the fifth
After writing invalid data to the currently selected data shown in the figure (
Step s1), a check is made to see if there is a touch on the top coordinates (step S2). If there is a touch (step 511), the coordinates are stored in the current selection data (step 513), and the next coordinate is checked (step S2). At this time, if there is already selected data this time, unless the coordinates are the same (step 512), it is assumed that a plurality of coordinates have been touched and invalid data is notified (step S6), and the process ends.

If the current selected data is invalid (no touch) when the first all coordinates check is completed (step S4), the fifth
After writing invalid data with no touch in the previously selected data shown in the figure (step S5), the invalid data is notified (step S6), and the process ends. If there is selected data this time (step S4), a second check is started (
Steps Sl to S4).

As a result, as shown in FIG. 3(a) or (b), 2
If more than one touch position is touched or if the touch position shifts, the detection result will not be notified. Then, the detection result is notified only when only one desired touch position is touched. Therefore, the touch position is reliably detected regardless of the operation status of the touch panel. Furthermore, generation of selection data due to hardware noise or the like can be prevented. As a result, erroneous input on the touch panel can be prevented.

When the second full coordinate check is completed successfully (step S
7) Compare the previous selection data and the current selection data (step S8). If the same is the case, it is assumed that the finger has not been released, that is, the finger is being touched continuously, and invalid data is notified (step S6), and the process ends. If different, the current selection data is written to the previous selection data (step S9).
), the current selection data is notified and the process ends.

As a result, as long as the user presses the touch panel with his/her finger, it is considered as one operation.

(Effects of the Invention) As explained above, according to the touch position determination method of the touch panel of the present invention, when only one touch position is touched as a result of two searches, that operation is determined to be valid. Therefore, if two or more coordinates are touched or the finger is misplaced, the operation becomes invalid, and erroneous operations can be prevented. Further, by performing such two searches, abnormal data due to hardware noise or the like can be treated as an error.

Further, when the current selection data and the previous selection data are compared and they match, it is possible to notify the touch panel data of one location and then invalidate it until the finger is removed from that coordinate.

In the manner described above, it is possible to eliminate the occurrence of erroneous input of touch panel data by the user.

[Brief explanation of the drawing]

Fig. 1 is a flowchart showing the procedure of the method of the present invention, Fig. 2 is a flowchart showing the procedure of the conventional method, Fig. 3 is an explanatory diagram of the operation status of the touch panel, and Fig. 4 is the device to which the present invention is applied. The front view of FIG. 5 is a diagram showing an example of control information according to the present invention. Flowchart illustrating the steps of the conventional method FIG. 2x. Touch panel coordinates〉 Original image of the touch panel Figure 4 shows an example of IIIWI information related to the present invention.
figure

Claims (1)

[Claims] A plurality of touch positions are defined on a touch panel, and it is determined multiple times whether or not each touch position has been touched, and if a touch at only one touch position is detected two or more times in succession. A method for determining a touch position of a touch panel, characterized in that when a touch position is selected, the touch position is notified as a selected position.