JPH04100142A - Touch input device - Google Patents

Abstract

PURPOSE:To perform accurate input free from a failure by surely bringing a finger to the position of coordinates to be touched and touching this position while confirming its coordinates on a CRT. CONSTITUTION:When an operator puts his finger in an optical coordinate detector 3 for the purpose of touching a prescribed position on a touch screen 2, the light emitted from a light emitting part 31 is intercepted by the finger and does not reach a light receiving part 32. Since many light emitting parts and light receiving parts are arranged in a matrix, coordinates where light is intercepted (namely, the position of the finger) are recognized. A display controller 4 displays these coordinates on a CRT screen with a cursor moved in accordance with movement of the finger. Thus, an erroneous position is prevented from being inputted by deviation of his vision even if the operator does not exist in the front of the CRT.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to computers and industrial control devices.
The present invention relates to a so-called touch input device that performs screen switching input, data input, etc. in a data display device manually by touching a video portion displayed on the screen with a finger.

[Conventional technology]

Conventionally, the optical detection method detects coordinates and human power by passing infrared light or other light through the front of the CRT and blocking it with your finger (some systems detect the coordinates and human power not at the moment when the block is blocked, but at the next moment when it is no longer blocked). 7 of transparent resistors on the screen
A contact detection method (for example, Japanese Patent Laid-Open No. 60-54
017) is known.

[Problem to be solved by the invention]

Among optical detection methods, those that detect the moment the light is blocked, that is, the moment a finger is inserted, cannot correct the shift because the coordinates are determined as -1 as soon as the light is blocked.

In the case of detection at the moment when the screen is no longer obstructed, in order to complete the input conversion, it is necessary to indicate the coordinates with the finger and then pull the finger out. When the finger moved away from the light, the coordinates inevitably shifted.

For this reason, both methods have the problem that the input must be repeated many times, making the operation complicated.

In addition, with the contact detection method, the coordinates are determined at the point touched, and if the coordinates become incorrect, corrective action is required.
Similarly, there was a problem that the operation became complicated.

An object of the present invention is to provide a device that can solve the drawbacks of these conventional examples.

[Means to solve problems]

In a touch input device for a CRT screen, the light emitted by a touch detection device attached to the front of the CRT screen and a light emitting section attached to the front of the touch detection device is blocked because the light does not reach the light receiving section. The present invention is characterized by comprising: a coordinate detection device that detects coordinates; and a device that displays the coordinates detected by the coordinate detection device or a display corresponding thereto on the CRT screen.

[Operation] When performing a touch input operation using the above means, when a finger is inserted into the coordinate detection device, a cursor is displayed on the screen based on the coordinate data at this time, and the coordinates can be confirmed.

Then, while checking the coordinates, the operator touches the CR and T screens with his/her finger and performs manual operation using the touch sensor, making it possible to perform accurate manual operation extremely easily.

〔Example〕

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

A touch screen 2 is attached to the front of the screen of the CRTI, and an optical coordinate detection device 3 is attached to the front of the touch screen.

When the operator's finger enters the optical coordinate detection device 3 in an attempt to touch a predetermined position on the touch screen 2, the light (infrared rays may also be used) emitted from the light emitting section 3I is blocked by the finger and the light receiving section I can't reach 32. Since these light emitting parts and light receiving parts are arranged in large numbers in the form of IJ hooks (vertically and horizontally), it is possible to grasp the blocked coordinates (that is, the position of the finger).

The display control device 4 displays the coordinates on the CRT screen, for example, with a cursor that moves according to the movement of the finger. With this display, even if the operator is not in front of the CRT, he or she will not manually enter the wrong location due to a shift in line of sight.

The +game author visually confirms this display and inputs accurate coordinates by touching the touch screen 2 on the screen while aligning the cursor with the target position.

When a touch is detected on the touch screen 2, the coordinates at that point are taken in from the optical coordinate detection device 3.

The touch signal and the coordinate signal are then transmitted to the display control device 4 or an external device control device (not shown), and are used to change the display screen or to instruct external device B to turn on or off.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to reliably position the finger at the coordinate position to be touched, and the touch can be made while checking the coordinates on the CRT, so there is no mistake. Accurate input becomes possible.

[Brief explanation of drawings]

The drawings illustrate specific embodiments of the invention. 1...CRT 2...Touch screen 3...Optical coordinate detection device 3N... Light emitting part 32... Light receiving section 4...Display control device

Claims (1)

[Scope of Claims] A touch input device for a CRT screen includes a contact detection device attached to the CRT screen, and a light emitting section attached in front of the contact detection device so that the light emitted by the light emitting section does not reach the light receiving section. A touch input device comprising: a coordinate detection device that detects coordinates where light is blocked; and a display control device that displays the coordinates detected by the coordinate detection device or a display corresponding thereto on the CRT screen. .