JPH0555230U - Optical touch screen - Google Patents

Abstract

(57) [Summary] [Purpose] An optical touch screen that detects the pointing point of the operator by emitting a beam in the X and Y directions and detecting the blocked beam. It is an object of the present invention to provide an optical touch screen capable of detecting light. [Structure] First position detector 14 and second position detector 1
8 is provided, the pointing direction of the operator's finger is calculated, and the pointing point on the screen 12 is detected.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an optical touch screen that detects a pointing point of an operator by emitting a beam in X and Y directions and detecting the blocked beam.

[0002]

[Prior Art]

 FIG. 4 is a block diagram of a conventional optical touch screen. In the figure, 1 is a CRT device and 2 is a screen of the CRT device 1. Reference numeral 3 is a frame provided on the screen 2. A plurality of light emitting elements 4 for emitting a beam in the Y direction are provided on one side of the frame 3 in the X direction, and a plurality of light receiving elements for receiving a beam from the light emitting element 4 are provided on the other side. 5 are provided.

Similarly, a plurality of light emitting elements 6 that emit a beam in the X direction are provided on one side of the frame 3 in the Y direction, and a beam from the light emitting element 6 is received on the other side. A plurality of light receiving elements 7 are provided.

Next, the operation of the above configuration will be described. When the operator touches a desired position on the screen, the operator's finger blocks the beams in the X and Y directions, and the position (X1, Y1) of the operator's finger can be detected.

[0005]

[Problems to be solved by the device]

 However, in the optical touch screen having the above structure, the detected position of the operator's finger (X1, Y1) is just the coordinate on the plane P formed by the beams emitted from the light emitting elements 4 and 5.

However, as shown in FIG. 5, there is a distance d between the plane P on which the beam runs and the plane PS of the screen 2. Therefore, as shown in FIGS. 5 and 6, there is a problem in that the correct pointing position cannot be detected unless the finger is vertically placed on the screen.

The present invention has been made in view of the above problems, and an object thereof is to provide an optical touch screen capable of detecting an accurate pointing position of an operator.

[0008]

[Means for Solving the Problems]

 The invention according to claim 1 which solves the above-mentioned problems, is provided on a screen, and a first position detection unit for measuring a first detection position (X1, Y1) is provided on a screen side, and an external side is provided. Is provided with a frame having a second position detecting section for measuring the second detected position (X2, Y2) and an arithmetic section for calculating the instructed position on the screen.

According to a second aspect of the invention, the first and second position detecting sections in the first aspect of the invention are composed of a light emitting section and a light receiving section provided in the X direction and the Y direction, respectively. ..

According to a third aspect of the present invention, the arithmetic unit in the first or second aspect of the present invention is configured such that the first detection position (X1, Y1), the second detection position (X2, Y2) and the first detection position (X2, Y2). The pointing direction of the operator's finger is calculated from the distance between the position detection unit and the second position detection unit, and the pointing direction data, the distance between the second position detection unit and the screen, and the screen surface shape data of the screen are calculated. Is calculated and the coordinates (X, Y) on the screen with which the finger abuts are calculated.

[0011]

[Action]

 In the optical touch screen of the invention according to claim 1, the arithmetic unit includes a first detection position (X1, Y1) detected by the first position detection unit of the frame and a second detection position (X1, Y1) detected by the second detection unit of the frame. It takes in the two detection positions (X2, Y2) and detects the designated position on the screen.

In the optical touch screen according to the second aspect of the present invention, the light emitting section provided in the X direction of the first position detecting section and the second position detecting section is the light receiving section provided in the X direction. The beam is emitted toward the light-emitting portions of the first position detecting portion and the second position detecting portion, which are provided in the Y direction, toward the light receiving portion provided in the Y direction.

In the optical touch screen according to a third aspect of the present invention, the calculation unit includes a first detection position (X1, Y1), a second detection position (X2, Y2), and a first position detection unit. The pointing direction of the operator's finger is calculated from the distance between the second position detecting units, and the pointing direction data, the distance between the second position detecting unit and the screen, and the screen surface shape data of the screen are loaded, Calculate the coordinates (X, Y) on the screen where the finger touches.

[0014]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a block diagram for explaining an embodiment of the present invention, FIG. 2 is a diagram for explaining the operation in FIG. 1, and FIG. 3 is a block diagram of this embodiment.

First, the configuration of the optical touch screen of this embodiment will be described with reference to FIG. Reference numeral 11 is a CRT device, and 12 is a screen of the CRT device 11. A frame 13 is provided on the screen 12. A first position detector 14 is provided on the screen 12 side of the frame 13.

In the first position detector 14, a plurality of light emitting elements 15 that emit beams in a row in the Y direction are provided on one side of the frame 13 in the X direction, and on the other side thereof. A plurality of light receiving elements 16 corresponding to the light emitting elements 15 are provided to receive the beam from the light emitting elements 15. On one side in the Y direction of the frame 13, a plurality of light emitting elements 17 that emit beams in a row in the X direction are provided, and on the other side, the light emitting elements 17 correspond to the light emitting elements 17, and A plurality of light receiving elements 18 for receiving the beam are provided.

A second position detector 18 is provided on the outer side of the frame 13 adjacent to the first position detector 14. In the second position detector 18, a plurality of light emitting elements 19 that emit beams in a row in the Y direction are provided on one side of the frame 13 in the X direction, and the light emitting elements are provided on the other side. Corresponding to No. 19, a plurality of light receiving elements 20 for receiving the beam from the light emitting element 19 are provided. On one side of the frame 13 in the Y direction, a plurality of light emitting elements 21 that emit beams in a row in the X direction are provided, and on the other side, the light emitting elements 21 correspond to the light emitting elements 21. A plurality of light receiving elements 22 for receiving the beam are provided.

Next, the operation of the above configuration will be described with reference to FIGS. 2 and 3. As shown in FIG. 2, when the operator touches a desired position on the screen, the X-direction and Y-direction beams of the second position detection unit 18 are blocked by the operator's finger, and the second detection position is detected. The position (X2, Y2) of the operator's finger on the plane P2 on the certain second position detector 18 is detected.

Similarly, the X-direction and Y-direction beams of the first position detector 14 are blocked by the operator's finger, and the first position detector 14 on the plane P1 on the first position detector 14 is intercepted. The position (X1, Y1) of the operator's finger at is detected.

Then, as shown in FIG. 3, the calculation unit 30 detects the position data (X 1, Y 1) detected by the first position detection unit 14 and the position data (X 1, Y 1) detected by the second position detection unit 18. X2, Y2) and the tube surface shape data 31 of the screen 12 are taken in to calculate the coordinates (X, Y) on the screen 12 with which the operator's finger abuts.

This coordinate calculation method is performed as follows, as shown in FIG. From the first detection position (X1, Y1), the second detection position (X2, Y2) and the distance d2 between the first position detection unit 14 and the second position detection unit 18, the operator's finger Calculate the straight line L that indicates the pointing direction. This straight line L, the distance between the second position detector 18 and the screen 12, and the tube surface shape data 31 of the screen 12 are taken in to calculate the coordinates (X, Y) on the screen 12 with which the finger abuts. To do.

According to the above configuration, the pointing point on the screen 12 can be accurately calculated by calculating the pointing method of the operator's finger. Further, by taking in the tube surface shape data of the screen 12, it is possible to calculate a more accurate pointing point.

Further, even if one of the first position detector 14 and the second position detector 18 fails, the other position detector is used to calculate the instruction point of the operator. In addition, the accuracy can be the same level as that of the conventional optical touch screen.

[0024]

[Effect of the device]

 As described above, according to the present invention, it is possible to realize an optical touch screen that can detect an operator's accurate pointing position by using the two-stage position detecting unit.

[Brief description of drawings]

FIG. 1 is a configuration diagram illustrating an embodiment of the present invention.

FIG. 2 is a diagram illustrating an operation in FIG.

FIG. 3 is a block diagram of the present embodiment.

FIG. 4 is a configuration diagram of a conventional optical touch screen.

FIG. 5 is a diagram illustrating a problem of a conventional example.

FIG. 6 is a diagram illustrating a problem of a conventional example.

[Explanation of symbols]

 12 screen 13 frame 14 first position detector 18 second position detector 30 calculator

Claims (3)

[Scope of utility model registration request] 1. A first position detection unit (14) provided on a screen (12) for measuring a first detection position (X1, Y1) on the screen side, and a second position detection unit (14) on the outside side. Detection position (X
A frame (13) having a second position detector (18) for measuring (2, Y2), and a calculator (30) for calculating a designated position on the screen (12). Characteristic optical touch screen. 2. The first and second position detectors (14, 1)
The optical touch screen according to claim 1, wherein 8) includes a light emitting unit and a light receiving unit provided in the X direction and the Y direction, respectively. 3. The calculation unit (30) is configured to detect a first detection position (X
1, Y1), the second detection position (X2, Y2), and the pointing direction of the operator's finger is calculated from the distance between the first position detecting unit and the second position detecting unit, and the pointing direction data, The coordinate (X, Y) on the screen with which the finger abuts is calculated by taking in the distance between the second position detector and the screen and the screen surface shape data of the screen. Optical touch screen.