JPH0337072Y2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial application field This invention enables connection of multiple image sources such as televisions and video cameras in addition to the monitor image of the information processing system, and allows specifying the image source with a light pen. In particular, the present invention relates to a display device that switches display images.

B. Conventional technology Conventionally, there has been a plurality of display images, a specific light pen indicating device (usually multiple on one screen) is provided in the image, and when the light pen is operated, the position of this specific light pen indicating position A display device has been proposed that switches to display an image corresponding to a specific light pen indication position when detection is made (for example, see Japanese Patent Laid-Open No. 49-29532).

However, there is a problem in displaying a specific light pen pointing position in television images or video camera images, and the pointing position is not displayed. For this reason, in order to switch from a television image to an image displaying the indicated position, the image has been switched by making a selection using an input device such as a keyboard or a switching switch.

C. Problems to be solved by the invention The present invention has been made in view of the above-mentioned points, and it is possible to change the display from an image that does not have a specific light pen indication position, without increasing the cost by providing a special selection switch. The present invention aims to provide a display device that allows easy switching to a certain image.

D. Means for Solving the Problems The present invention provides a light pen, an image source for an image having an image indicating section indicating another image source that can be displayed, and an image source for an image having no image indicating section; a display means for displaying an image of an image source; a detection means for detecting the operation of a light pen and a position indicated by the light pen on the display means; a storage means for storing an image source of the displayed image; and the detection means. switching means for switching the image source of the image displayed on the display means to the image source corresponding to the image indicating section whose position has been detected when the position of the image indicating section is detected, the switching means: If the detection means detects the operation of the light pen when the storage means stores an image source of an image without an image instruction section, the display is performed without detecting the position indicated by the light pen on the display means. The display device is configured to switch the image source of the image displayed on the means to the image source of the image having an image instruction section.

E. Effect When the displayed image does not have an image indicator, that is, if the storage means stores an image source without an image indicator, the light pen can be operated even if the position is not detected by the detection means. If the image is displayed, the display is switched by the switching means to a specific image having an image instruction section.

F. Embodiment FIG. 1 is a schematic diagram of an embodiment of the present invention.
1 is a CRT which is a display means, 2 is a control circuit that controls the entire device, 3 is a memory that stores the image source of the image displayed on the CRT 1, 4 is a light pen, and 5 is a light pen 4. A light pen counter that detects the current operating position based on the input signal.
7 is a CRT control circuit for displaying image information generated by the control circuit 2 on the CRT 1;
9 is an image source that supplies a video signal of a television image, 9 is an image source that supplies a video signal of a video camera image, and 6 is controlled by the control circuit 2 to select the video line signals from the image sources 8 and 9 and the above-mentioned image information. This is a selection circuit for displaying images on the CRT1. As this image information, several types of images are prepared by the program processed by the control circuit 2, and the image instruction section (FIG. 2A) that represents other images that can be displayed is displayed on the image. It has also been done. In particular, basic images that can be switched to images from other image sources 8, 9 are shown in FIG. The program processing in the control circuit 2 is also progressed and displayed based on this basic image.

In a device having such a configuration, at startup, the control circuit 2 displays a display as shown in FIG. 2 via the CRT control circuit 7. At this time, the selection circuit 6
The CRT control circuit 7 is selected, and the CRT control circuit 7 is stored in the memory 3 as a display image source.
When the light pen 4 is operated, position information detected by the light pen counter 5 is sent to the control circuit 2. The control circuit 2 performs control according to the meaning corresponding to the position information.

When the light pen 4 is placed and operated on the image indicating area a representing a television image, the position is detected by the light pen counter 5 in response to the input signal. The control circuit 2 receives the position information and selects the selection circuit 6.
selects the image source 8 of the television image, and further stores the image source 8 of the television image, which is the display image source, in the memory 3. Although a television image is displayed on the CRT 1, the image instruction section A as shown in FIG. 2 is not displayed on the displayed image.

Here, the light pen 4 is operated and its input signal is input to the control circuit 2. Normally, the input of positional information from the light pen counter 5 would be awaited, but since the memory 3 stores an image source 8 of a television image that is not displayed in the image instruction section, the control circuit 2 Regardless of whether detection is made or not, the selection circuit 6 selects the CRT control circuit 7 to display the basic image shown in FIG. 2, and stores this in the memory 3.

G. Effect of the invention As is clear from the above explanation, the present invention is effective in detecting the position of the light pen when the content of the memory circuit that stores the image source of the displayed image is an image source that does not have an image indicating section. Regardless, since switching to the basic image is performed simply by operating the light pen, there is no need to provide a special selection switch, and various images can be selectively displayed with ease.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of displaying a basic image. 1...CRT, 2...Control circuit, 3...Memory circuit, 4...Light pen, 6...Selection circuit, 7...
CRT control circuit, 8, 9...image source.

Claims (1)

[Claims for Utility Model Registration] A light pen, an image source of an image having an image indicator indicating another image source that can be displayed, an image source of an image without the image indicator, and an image display of the image source. a display means for detecting the operation of a light pen and a position indicated by the light pen on the display means; a storage means for storing an image source of an image being displayed; switching means for switching an image source of an image to be displayed on the display means to an image source corresponding to the image indicating section whose position has been detected when the position of the image indicating section is detected; If an operation of the light pen is detected by the detection means while an image source of an image having no part is stored, an image to be displayed on the display means without detecting the position indicated by the light pen on the display means. A display device characterized in that the image source of the image is switched to an image source of an image having an image instruction section.