JPS60143390A - Image signal switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to improvements in display terminals for image information devices.

[Description of prior art]

FIGS. 1 and 2 are block configuration diagrams showing the configuration of a conventional device. In the conventional device shown in FIG. 1, a ROM 21 is used in the control circuit 2, and in the conventional device shown in FIG. Further, No. 3 and 1 indicate divided areas of an image displayed on the screen 50 by the conventional device. In this conventional device, the horizontal address signal ■ and the vertical address signal ■
The ranges of the horizontal switching portion a and the vertical switching portion A are set by each of these, and the screen 50 is divided into two areas by a rectangular outline 51 formed by the selected ranges. One of the image signals (2) and (2) is displayed in one area of the divided screen 50, and the other image signal is displayed in the other area.

The shape of this divided area is limited to a rectangular shape as described above, and there is a drawback that it is not possible to divide the area into an arbitrarily shaped outline 52 as shown in FIG. 4 and switch the display on the screen 50.

[Purpose of the invention]

SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned drawbacks, and aims to provide a device that allows images to be switched and displayed in arbitrarily shaped areas by simple area setting operations and operations defined by simple software. shall be.

[Features of the invention]

The present invention is capable of switching and displaying images in an arbitrary shaped area, and includes a switching circuit that selects one of the image signals input to a plurality of input terminals and connects it to an output terminal, and a control input signal to the switching circuit. In the image signal switching device, the control circuit is capable of accumulating bit signals for at least one frame of the image signal sent to the output terminal, and outputs the readout output to the control input. A memory for generating a signal, a circuit means for rewriting the contents of this memory into a desired pattern, and a signal corresponding to the scanning of the image signal sent to the output terminal is applied to the address input of the memory to continuously output the stored contents. The invention is characterized by comprising circuit means for

[Explanation based on examples]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A device according to an embodiment of the present invention will be explained below based on the drawings.

FIG. 5 is a block diagram showing the configuration of the apparatus of this embodiment. First, the configuration and connections of this embodiment device will be explained based on FIG. 5.

The device of this embodiment is composed of a switching circuit 1 and a control circuit 2, and the control circuit 2 is composed of a rewriting/continuation circuit (hereinafter referred to as a shoe/reading circuit) 24 and a memory 25. book·
The reading path 24 includes circuit means for rewriting the contents of the memory 25 into a desired pattern, and circuit means for applying a predetermined signal to the address input of the memory 25 to read out the stored contents. The switching circuit 1 also has a first image signal input terminal (hereinafter referred to as the first input terminal), a second image signal input terminal (hereinafter referred to as the second input terminal), and an image signal input terminal. It has an output terminal (hereinafter referred to as an output terminal) and a control input signal terminal (hereinafter referred to as a control terminal).

An image signal ■ from a first image signal source (not shown) is connected to the first input terminal of the switching circuit 1, and an image signal ■ from a second image signal source (not shown) is connected to the first input terminal of the switching circuit 1.
is connected to be inputted to the second input terminal of the switching circuit 1, and the output of the switching circuit 1 is connected to be applied to an image display section (not shown) from the output terminal of the switching circuit 1.

The write/read path 24 and the memory 25 are connected so that the address signal ■ and rewrite data ■ from the read/write path 24 are given to the memory 25, and the control input signal ■ from the memory 25 is applied to the switching circuit 1. The memory 25 and the switching circuit 1 are connected as given.

Next, the operation of this embodiment device will be explained based on FIGS. 5, 6, and 7. FIG. 6 is a flowchart showing the order of rewriting operations in the memory 25, and FIG. 7 is a diagram showing a comparison between the stored contents of the memory 25 and the image displayed by the image signal output from the switching circuit 1. .

First, while operating the writing/reading path 24 and displaying the position using a cursor or trackball on the display screen 50, as shown in FIG.
Specify. Along with this designation operation, in the memory 25, the data of the corresponding storage content on the outline 53 of the switching area is changed to "1".
", and the data at the storage address corresponding to the screen portion other than the outline 53 is set to "0".

When the setting of this switching area is completed, by specifying an arbitrary point on the contour internal area shown by the diagonal line in FIG. 6(B), the memory 25 corresponding to the area inside the contour All data at storage addresses are set to 11.

Next, an address signal ■ is sent from the writing/reading path 24 to the memory 25.
is given. By this address signal ■, switching circuit 1
A control input signal (2) corresponding to the stored content of the memory 25 is sent to the switching circuit 1 at a timing corresponding to the scanning of the image signal [phase] sent from the output terminal of.

The switching circuit 1 outputs the image signal ■ as an image signal [phase] when the control input signal ■ is "0", and outputs the image signal ■ as an image signal [phase] when the control input signal ■ is "1". ] is output. Therefore, the stored contents of the memory 25 are the seventh
As shown in FIG. 7(C), when the data corresponding to the area on the contour line and inside the contour is "1" and the data corresponding to the area outside the contour is "10", FIG.
As shown in D), on the screen 50, an image corresponding to the muko image signal ■ is displayed on the contour line 53 and an area inside the contour, and an image according to the image signal ■ is displayed on the area outside the contour. Is displayed.

In this example device, the number of regions is "2" and the number of image signals input to the switching circuit 1 is "2", but the present invention can be carried out.

Further, in this embodiment device, the number of setting types for the memory section is "1", but the present invention can be practiced even if this number is "n" (however, n is any natural number). . In this case, it is possible to display up to "2n" types of switching areas on the screen.

〔Effect of the invention〕

The present invention makes it possible to switch and display images in arbitrarily shaped areas, but as mentioned above, since the setting of the switching area is performed via the memory circuit, it is possible to re-set the area and change the area. Since some changes can be made easily, this device has the effect of making it easier to operate.

In addition, the area can be determined without depending on the signals on the boundary line of the area.
This is done using signals at all positions on the area, which simplifies the software governing image switching operations.
This has the effect of reducing costs.

[Brief explanation of drawings]

FIGS. 1 and 2 are block configuration diagrams showing the configuration of a conventional device. FIG. 3 is an explanatory diagram showing a switching area that can be realized with a conventional device. FIG. 4 is an explanatory diagram showing an arbitrarily shaped switching area. FIG. 5 is a block configuration diagram showing the configuration of an apparatus according to an embodiment of the present invention. FIG. 6 is a flowchart explaining the rewriting operation. FIG. 7 is a diagram showing a comparison between stored contents and displayed images. ■...Switching circuit, 2...Control circuit, 2I...RO
M, 22...Regisf, 23...Comparator, 24...
・Book/reading path, 25...Memory, 50...Screen, 5
1.52.53...A contour that divides an area. Patent applicant Yokogawa Medical System Co., Ltd. Agent
Patent Attorney Nao Takashi Ide 1 Figure 2 Atsushi 3 Atsushi 4 Kasumi Group 6 (C) (D) Misfortune 7 Figure

Claims (1)

[Claims] (1) In an image signal switching device that includes a switching circuit that selects one of the image signals input to a plurality of input terminals and connects it to an output terminal, and a control circuit that provides a control input signal to this switching circuit, the above-mentioned The control circuit includes a memory capable of storing focus signals for at least one frame of the image signal sent to the output terminal, and whose readout output is used as the control input signal; and circuit means for applying a signal corresponding to the scanning of the image signal sent to the output terminal to the address input of the memory to read out the stored contents of the image signal. Switching device.