JPH05313823A - Two-dimensional coordinate reading device - Google Patents

Abstract

PURPOSE:To provide a two-dimensional coordinate reading device which can facilitate the designation of an input mode and also to surely input the coordinates. CONSTITUTION:The output of a 1st photodetector 22 is switched by a 1st changeover switch 31, converted into a digital signal by a 1st A/D converter 32 and inputted to a microcomputer 30. Meanwhile, the output of a 2nd photodetector 24 is switched by a 2nd changeover switch 33, converted into a digital signal by a 2nd A/D converter 33 and inputted to the microcomputer 30. The contact of a mode changeover switch 26 is directly inputted to the microcomputer 30. Furthermore, the output of a conductive filmswitch 28 provided on the surface of a display 20 is fetched by the microcomputer 30 via a detecting circuit 35. Thus, it is possible to easily switch the modes and also to surely input the coordinates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-dimensional coordinate reading device for inputting coordinates by pointing a figure displayed on a display such as a CRT display or a liquid crystal display with a finger, and particularly when used for an in-vehicle display. The present invention relates to a two-dimensional coordinate reading device capable of increasing the certainty of input.

[0002]

2. Description of the Related Art Various types of optical matrix switch devices have been proposed as pointing devices for inputting coordinates by directly pointing a figure displayed on a display, for example, a CRT display (for example, Japanese Patent Application No. 2-60112). reference).

In this optical matrix switch device, a light source and a light receiving element are arranged in a vertical direction and a horizontal direction, and an intersection of light intercepted by a finger is used as an input coordinate. However, even when the figure displayed on the CRT display is directly pointed, the meaning of the pointing action is different between the case of actually inputting the coordinate and the case of inputting the coordinate to be canceled in order to cancel the inputted coordinate.

For example, in the case where the shortest route is displayed by inputting the present location and the destination in the car navigation system, it may be necessary to cancel the entered destination and input a new destination. Equivalent to. In such a case, it is conventionally necessary to point to a destination that has already been input, then point to a predetermined position on the CRT display to specify the cancellation mode, point to a new target value, and then enter the input mode. Had to be specified. The same applies to liquid crystal displays and the like.

[0005]

As described above, in the conventional optical matrix switch device, it is necessary to input the position pointed on the display as coordinates and further specify the input mode. In particular, when designating the input mode, it is necessary to confirm the predetermined position on the display before pointing, and this is not necessarily appropriate as an in-vehicle system.

Further, the optical matrix switch device can increase the resolution by increasing the number of light receiving elements, but when a finger is moved on the display surface to search for a predetermined position, erroneous input is likely to occur. The present invention has been made in view of the above problems, and an object of the present invention is to provide a two-dimensional coordinate reading device capable of not only facilitating input mode designation but also surely inputting coordinates. To do.

[0007]

FIG. 1 shows a second embodiment of the present invention.
It is a block diagram of a dimensional coordinate reading device. That is, the first aspect of the invention is that the first light source array 11 arranged on one side of the display.
A first light receiving element array 12 disposed on a side opposite to the side on which the first light source array 11 is disposed; and a first light receiving element array 12 disposed on a side adjacent to the side on which the first light source array 11 is disposed. Second light source row 1 provided
3, the second light receiving element array 14 disposed on the side opposite to the side on which the second light source array 13 is disposed, the light receiving signal of the first light receiving element array 12, and the second light receiving element array Coordinate determining means 15 for determining the coordinate pointed on the display based on the received light signal of 14, at least one mode changeover switch 16 provided around the display, and each time the mode changeover switch 16 is operated. And a process switching unit 17 for switching the process in which the data input from the coordinate determining unit 15 is used.

A second aspect of the present invention is a transparent conductive film switch 18 installed so as to cover the surface of the display, and the coordinates determined by the coordinate determining means 15 when the conductive film switch 18 is turned on. And a data input means 19 for taking in as.

[0009]

In the first aspect of the invention, different processing is performed on the coordinate data input each time at least one mode changeover switch is operated. In the second invention, the position on the display is accurately determined by the optical matrix switch, and the coordinate data is input when the conductive film switch is turned on. Therefore, the coordinate data is input accurately and surely.

[0010]

2 is a block diagram of a CRT display used in a two-dimensional coordinate reading device according to the present invention.
(A) shows a front view and (B) shows a side sectional view. Ie CR
A first light source array 21 for generating parallel light rays in the vertical direction is provided on the upper side of the T display 20, and a first light receiving element 22 for receiving parallel light rays emitted from the first light source array 21 is provided on the lower side thereof. Has been done.

A second light source array 23 for generating parallel light rays in the lateral direction is provided on the left side, and a second light receiving element 24 for receiving parallel light rays emitted from the second light source array 23 is provided on the right side. Has been done. Further, a transparent conductive film switch 28 is installed on the display surface of the CRT display 20, and C
A mode changeover switch 26 is installed on the lower side of the RT display 20.

FIG. 3 is a hardware configuration diagram of an embodiment of a two-dimensional coordinate reading device according to the present invention. For example, the output of the first light receiving element 22 which is a phototransistor array is switched by a first changeover switch 31. After being processed, it is converted into a digital signal by the first A / D converter 32 and input to the microcomputer 30. The output of the second light receiving element 24 is switched by the second changeover switch 33, converted into a digital signal by the second A / D converter 33, and input to the microcomputer 30.

The contacts of the mode changeover switch 26 are directly input to the microcomputer 30. The conductive film switch 2 installed on the surface of the CRT display 20
The output of 8 is taken into the microcomputer 30 via the detection circuit 35. FIG. 4 shows a microcomputer 30.
It is a flow chart of the mode change routine executed by the step, and is executed every time the mode change switch 26 is operated.

In step 41, it is determined whether or not the mode changeover switch 26 has been operated. If not, the process directly proceeds to step 45. If it is determined in step 41 that the mode changeover switch 26 has been operated, the process proceeds to step 42 and the flag MO indicating the processing mode is displayed.
It is determined whether D is "1".

If the flag MOD is "1", step 4
In step 3, the flag MOD is set to "0". On the contrary, if the flag MOD is "0", the routine proceeds to step 44, where the flag MOD is set to "1" and the routine proceeds to step 45. In step 45, the mode is displayed on the CRT display 20 and this routine is finished.

That is, each time the mode changeover switch 26 is operated, the value of the flag MOD is inverted. FIG. 5 is a flowchart of a first coordinate reading / processing routine executed by the microcomputer 30, which is executed every time the light is cut off. In step 51, it is judged whether or not the light is blocked, and if it is not blocked, this routine is immediately ended.

If the light is blocked, the process proceeds to step 52, and the X and Y coordinates of the blocked position are read. In step 53, it is determined whether or not the value of the flag MOD is "1". If the value of the flag MOD is "1", step 5
Then, the process A is executed. On the contrary, if the value of the flag MOD is "0", the routine proceeds to step 55, the processing B different from the processing A is executed, and this routine is ended.

For example, in the process A, the read coordinates (X / Y) are handled as input data, and in the process B, the read coordinates (X / Y) are handled to cancel the already input coordinate data. Can be The number of mode changeover switches 26 is not limited to one, and a plurality of mode changeover switches 26 can be installed around the CRT display.

When N mode changeover switches are installed, 2 ^N kinds of modes can be set. FIG. 6 shows a conductive film switch 2 according to the second invention.
2nd coordinate reading used when 8 is installed
6 is a flowchart of a processing routine, which includes step 61 between steps 52 and 53 of the routine of FIG.
Is inserted, and step 54 or step 55 is executed only when the conductive film switch 28 is turned on.

That is, in step 51, it is judged whether or not the light is blocked, and if it is not blocked, this routine is immediately terminated. If the light is blocked, the process proceeds to step 52, the X coordinate and the Y coordinate of the blocked position are read, and the process proceeds to step 61. In step 61, it is determined whether the conductive film switch 28 is turned on,
If it is not on, this routine ends.

If the conductive film switch 28 is turned on, the routine proceeds to step 53, where the flag MOD is set at step 53.
It is determined whether the value of is "1". If the value of the flag MOD is "1", the process proceeds to step 54 and the process A is executed. On the contrary, if the value of the flag MOD is "0", the routine proceeds to step 55, the processing B different from the processing A is executed, and this routine is ended.

That is, according to the second aspect of the invention, since the processing is performed only when the conductive film switch is pressed and turned on, the coordinate position can be surely input.

[0023]

According to the present invention, the pointing operation can be performed once by pointing the display surface after operating the mode changeover switch to set a predetermined mode. Further, when a conductive film switch is installed on the display surface, it becomes possible to input the coordinate position with certainty.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of the present invention.

FIG. 2 is a configuration diagram of a CRT display.

FIG. 3 is a hardware configuration diagram of the embodiment.

FIG. 4 is a flowchart of a mode switching routine.

FIG. 5 is a flowchart of a first coordinate reading / processing routine.

FIG. 6 is a flowchart of a second coordinate reading / processing routine.

[Explanation of Codes] 11 ... First light source array 12 ... First light receiving element array 13 ... Second light source array 14 ... Second light receiving element array 15 ... Coordinate determining means 16 ... Mode changeover switch 17 ... Processing changeover means 18 ... Conductive film switch 19 ... Data input means

Claims (2)

[Claims] 1. A first light source array arranged on one side of a display, and a first light receiving element array arranged on a side opposite to the side on which the first light source array is arranged, A second light source array disposed on a side adjacent to the side disposed on the first light source array, and a second light source disposed on a side opposite to the side disposed on the second light source array. A light receiving element array, a coordinate determining means for determining the coordinate pointed on the display based on the light receiving signal of the first light receiving element row and the light receiving signal of the second light receiving element row, and the periphery of the display. Two-dimensional coordinate system including at least one mode changeover switch provided in the above, and a process changeover unit for changing over the process in which the data input from the coordinate decision unit is used each time the mode changeover switch is operated. Reader. 2. A transparent conductive film switch installed so as to cover the surface of the display, and data input means for taking in the coordinates determined by the coordinate determining means as input data when the conductive film switch is turned on. 2 according to claim 1, further comprising:
Dimensional coordinate reading device.