JPH0283722A - Screen coordinate input device - Google Patents

Abstract

PURPOSE:To attain the application of the same screen coordinate input device consisting of a light emitting part, a light receiving part, and a matrix scan circuit regardless of the change of the screen size of a display by dividing the input device for each unit and adding a decoder to each divided unit. CONSTITUTION:The scan coordinates 82 set in the vertical direction are decoded by a light emitting decoder 87, and the decoder 87 which activates a light emitting element 88 serves as a circuit proper to a unit. This circuit differs with the light emitting element units 31 and 32. For instance, the unit 31 decodes phithrough 49 and the unit 32 does 50 through 90 respectively. In such a way, the light emitting elements arranged in the vertical direction are activated successively. A light receiving element unit circuit also works in the approximately same way. In this unit circuit, however, the element 88 is replaced with a light receiving element 92 and the light receiving result is outputted as the data 84. The unit set in the horizontal direction also has the same working. In such constitution, a screen coordinate input device is obtained in accordance with the optional size of a display by combining the vertical and horizontal light emitting and receiving units.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an input device in which coordinate information on a display screen is input by directly pointing a finger at the screen surface, and particularly relates to an input device in which coordinate information on a display screen is input by directly pointing a finger at the screen surface, and in particular, in a case where the size of the display changes. suitable for the case.

[Conventional technology]

The conventional optical coordinate input device is Utility Model No. 62-151648.
As shown in the publication, a group of light emitting elements and a group of light receiving elements are housed in a fixed national body.

[Problem to be solved by the invention]

With the above-mentioned conventional technology, when the screen size of the display changes, it is not possible to transform the national polka dot with light emitting and light receiving elements, so it becomes necessary to create a new polka dot, which poses a problem in terms of usability.

An object of the present invention is to enable the use of the coordinate input device that was used before the screen size change even if the screen size of the display changes.

[Means to solve the problem]

In order to achieve the above object, the National Athletic Meet equipped with light-emitting elements and light-receiving elements is divided into units (for example, National Athletic Meets with a length of 1 inch). A decoder corresponding to the position of the divided unit is mounted on the divided unit so that light can be emitted and received at that position.

By dividing the unit in this way, it becomes possible to expand or shorten the unit to accommodate extremely large displays.

[Effect]

An address bus indicating cutting coordinates for light emission and light reception is supplied to the unit. These are sent through the unit from the control section that performs the matrix scan. The light receiving section returns the received light data to the control section, and the control section outputs input coordinates based on the data and the coordinate values on the address bus.

Coordinate values can be detected by matrix scanning as described above.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 is an implementation diagram of the one-screen coordinate input device of the present invention. The display tube surface 1 is mounted so as to be surrounded by light emitting/light receiving element units. Unit and control section 11. The spacer 21 is adhered to the surface of the display housing 2.

The unit has a group of light emitting elements on the left side and above the screen, and a group of light receiving elements on the right side and bottom side of the screen. Vertical light emitting element unit)
The light emitted from the (F) 31 is the light receiving element unit (r) 5.
1 is detected. Similarly, the light emitted from the horizontal light emitting element unit (H) 41 is transmitted to the light receiving element unit (H) 6.
1 is detected.

Fig. 2 does not show a sectional view of the connection between the units. The unit is fixed to the display case using double-sided adhesive tape. Some of the edges are shaped like connectors so that power and coordinate addresses can flow between the units.

FIG. 6 shows a block diagram of the control section 11. The mad link scan circuit is a circuit that outputs a coordinate value for detection. From the matrix scan circuit 81, vertical scan coordinates 82 and horizontal scan coordinates 83 flow to the light emitting/light receiving element unit through an address bus. The result of light reception is 84. It enters the coordinate detection circuit 86 as a horizontal direction light reception data 85. Outputs the coordinate values detected from the light reception results and the coordinate values on the address bus.

Next, the light emitting element unit and the light receiving element unit will be explained by taking a vertical direction as an example.

FIG. 4 shows a circuit diagram of the light emitting device (Unino) (1'l).

The vertical scan seat s82 is decoded by a light emitting decoder 87, and the decoder that causes the corresponding light emitting element 88 to emit light is a unit-specific circuit, and the light emitting element unit) (F
isl and 52 are different. For example, if 61 decodes φ to 549, 32 decodes 50 to 99. In this way, the light emitting elements arranged in the vertical direction can sequentially emit light.

The light receiving element unit circuit shown in FIG. 5 operates in substantially the same manner. The difference is that the light emitting element 88 is replaced by a light receiving element 92, and the result of light reception is output as data 84.

Horizontal units perform similar operations.

From the above operations, a screen coordinate input device compatible with any size display can be constructed by combining horizontal and vertical light emitting/light receiving units.

〔Effect of the invention〕

According to the present invention, the screen coordinate input device can be changed at low cost depending on the size of the display.

[Brief explanation of the drawing]

FIG. 1 is an implementation diagram of an embodiment of the present invention on a disk fly;
Figure 2 is a sectional view taken along line 1-n in Figure 1, Figure 3 is a block diagram of the screen coordinate detection circuit, Figure 4 is a circuit diagram of a vertical light emitting element unit, and Figure 5 is a vertical light receiving element unit. FIG.

Claims (1)

[Claims] 1. A screen coordinate input device comprising a screen coordinate input device consisting of a light emitting section, a light receiving section, and a matrix scan circuit, which is divided into units, and each unit is provided with a decoder.