JPH05158462A - Composite terminal device - Google Patents

Abstract

PURPOSE:To provide a composite terminal device which erases only information that is required to be erased from the screen of a display. CONSTITUTION:An ISDN line is connected to a digital telephone set 1. A pen input section 2 inputs plotting information and a scanner input section 3 inputs picture information. The picture information inputted from the section 3 is stored in a first display picture memory 4 and the plotting information inputted from the section 2 is stored in a second display picture memory 5. A display picture control section 6 controls the memories 4 and 5 and if required, the information stored in the memories 4 and 5 is added and displayed on the display. An output section 7 such as a printer outputs the information stored in the memories 4 and 5 to the printer, etc. The functional elements 1 to 7 are controlled by a central processing section 8 which consists of a CPU, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite terminal device having an image display function and a telewriting function.

[0002]

2. Description of the Related Art Conventionally, as a composite terminal device of this type,
For example, ISDs connected to each other via ISDN line
There are N compound terminal devices. This device comprises a digital telephone connected to an ISDN line and a display for displaying image information and drawing information. The display device displays image information input from the scanner and drawing information input from the stylus pen. Therefore, in communication between persons at remote locations, image information and drawing information can be used in addition to voice information. Therefore, it is possible to exchange more detailed information.

For example, by transmitting a map as image information to the receiving side via the ISDN line, displaying the map on the display of each other's compound terminals, and pointing the corresponding point with a pen on the display with an arrow, It is possible to convey information that is difficult to express only with information. Such a compound terminal device also has a function of erasing the information displayed on the display, and when erroneous information is input, the input information can be erased from the display. Therefore, information can be transmitted more easily.

[0004]

However, the above-mentioned conventional composite terminal device has the following drawbacks.
In other words, there is a case in which it is desired to erase only the handwritten and input drawing information displayed on the display, but also the image information displayed overlapping with the drawing information. As a result, the image information of interest disappears from the screen, and similar image information must be transmitted again. In addition, the same phenomenon may occur when only the image information on the screen is desired to be erased, and the drawing information which is not desired to be erased may be erased.

[0005]

The present invention has been made in order to solve such a problem, and the information storage means for storing the information displayed on the display means is the first image memory for storing the image information. And a second image memory for storing drawing information, and the display means displays information obtained by adding the image information and the drawing information stored in each of these memories.

Further, there is provided erasing means for erasing the predetermined information stored in the first image memory or the second image memory and for not displaying the erased predetermined information on the display means.

[0007]

The image information and the drawing information are stored in separate image memories, and the display unit displays the information obtained by adding the information stored in each image memory. Therefore, even if the storage content of one of the image memories is changed, the storage content of the other image memory is not affected at all.

[0008]

1 is a block diagram showing a functional configuration of an ISDN composite terminal device according to an embodiment of the present invention.

An ISDN line is connected to the digital telephone 1, and digital voice information is transmitted and received for conversation. The pen input unit 2 is a telewriting information input device for handwriting input of drawing information such as figures and characters on a display screen. The scanner input unit 3 is an image information input device for inputting image information such as maps and photographs on the display screen. The first display screen memory 4 is an image memory that stores the image information input from the scanner input unit 3 as binary image data, and the second display screen memory 5 stores the drawing information input from the pen input unit 2. An image memory for storing. The display screen control unit 6 controls the respective display screen memories 4, 5
Is controlled to add the information stored in the memories 4 and 5 in response to the request, and display the added information on the display. The output unit 7 such as a printer outputs the information stored in the display screen memories 4 and 5 to a printer or the like, and prints the stored information on paper. Each of these functional elements 1 to 7 is controlled by a central processing unit 8 including a CPU and the like, and control information, image information and drawing information are exchanged via a data bus.

FIG. 2 is a flow chart showing the display screen switching function of the composite terminal device according to this embodiment.

First, the central processing unit 8 judges whether or not drawing information is sent out on the data bus (step 10).
1). If there is no drawing information on the data bus, the central processing unit 8 next determines whether or not the image information is sent on the data bus (step 102). Here, the drawing information and the image information are set with flags indicating the respective types of information, and the central processing unit 8 determines the respective types of information based on this flag. In step 101, when the drawing information is transmitted to the data bus, the central processing unit 8 selects the second display screen memory 5,
The input information is sent to the display screen control unit 6 as the second display screen memory 5
It is controlled to be stored in (step 103). In step 102, when the image information is sent out on the data bus, the central processing unit 8 selects the first display screen memory 4 and displays the input information on the display screen control unit 6 in the first display. The screen memory 4 is controlled to be stored (step 104).

The display screen control unit 6 adds the image information and the drawing information stored in the display screen memories 4 and 5 and adds them when the information is input to the display screen memories 4 and 5. Display the combined information on the display. For example, when a map is input as the image information and an arrow indicating a certain point on the map is input as the drawing information, a screen with an arrow on the map is displayed on the display. Further, only one of the information is displayed on the display screen memory 4
If the input is 5 or 5, the display screen control unit 6 displays only the image information or the drawing information on the display (step 105).

On the other hand, in step 102, when the input information is neither the drawing information nor the binary information, the central processing unit 8 causes the composite terminal to execute other processing such as voice information processing and file transfer processing. Control (Step 1
06).

When the information displayed on the display is erased, the following processing is performed under the control of the central processing unit 8. That is, when the central processing unit 8 detects that the information erasing request is transmitted on the data bus,
It is determined whether the requested information is drawing information or binary information. Then, after determining the type of the requested information, the position on the screen of the information requested to be erased is detected. If the information requested to be erased is image information, the first
The display screen memory 4 is selected and the binary image data stored at the detected position is deleted from the stored contents of the first display screen memory 4. If it is drawing information, the second display screen memory 5 is selected, and the drawn image data stored at the detected position is erased from the stored contents of the second display screen memory 5. As a result, the display screen control unit 6 eliminates the information display of the relevant portion from the contents read from the memories 4 and 5 and displayed on the display.

For example, in the case of the above example, when the point indicated by the arrow on the map is erroneously designated and the deletion request of the arrow is issued, the corresponding information stored in the second display screen memory 5 is stored. The drawing information of the location is deleted from the stored content. The display screen control unit 6 adds the information stored in the memories 4 and 5, and displays the added information on the screen of the display. Therefore, the arrow on the map disappears and is erased. At this time, the map information displayed overlapping the arrow does not disappear as in the conventional case, and it is not necessary to send the map information again. This is because the planes for storing the display information are the two display screen memories 4 and 5 and the image information and the drawing information are handled independently of each other. Therefore, even if one information is erased, the storage content of the other information is stored. It has no effect on the.

FIG. 3 is a flow chart showing the display image printer output function of the composite terminal device according to this embodiment.

First, the central processing unit 8 judges the format of the printer output request (step 201). In the case of the format in which the image information and the drawing information are individually output to the printer, the central processing unit 8 first selects the first display screen memory 4, and the display screen control unit 6 stores the contents stored in the display screen memory 4. Is controlled to be transferred to the output unit 7 such as a printer (step 202). The output unit 7 such as a printer receives the transfer information and prints the image information stored in the first display screen memory 4 on a sheet (step 203). Subsequently, the central processing unit 8 selects the second display screen memory 5,
The display screen control unit 6 is controlled to transfer the stored contents of the display screen memory 5 to the output unit 7 such as a printer (step 204). The output unit 7 such as a printer receives the transfer information and prints the drawing information stored in the second display screen memory 5 on a sheet (step 205). On the other hand, in the case of requesting the printer to output the image information and the drawing information in a combined format, the display screen control unit 6 stores the image information stored in the first display screen memory 4 and the second display screen memory 5. The stored drawing information is added, and the added information is transferred to the output unit 7 such as a printer (step 206). The output unit 7 such as a printer receives the transfer information and prints an image in which the image information and the drawing information are superimposed on a sheet (step 20).
7).

[0018]

As described above, according to the present invention, image information and drawing information are stored in separate image memories,
Information obtained by adding the information stored in each image memory is displayed on the display. Therefore, even if the storage content of one of the image memories is changed, the storage content of the other image memory is not affected at all. Therefore, only the information to be erased can be erased from the screen of the display, and the information displayed over the erased information will not be erased unintentionally.

[Brief description of drawings]

FIG. 1 is a block diagram showing a functional configuration of a composite terminal device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a display screen switching function of the composite terminal device according to the present embodiment.

FIG. 3 is a flowchart showing a display image printer output function of the composite terminal device according to the present embodiment.

[Explanation of symbols]

 1 ... Digital telephone 2 ... Pen input section 3 ... Scanner input section 4 ... First display screen memory 5 ... Second display screen memory 6 ... Display screen control section 7 ... Printer output section 8 ... Central processing section

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04N 1/38 8839-5C

Claims (2)

[Claims] 1. A composite terminal device comprising: information storage means for storing image information and drawing information; and display means for displaying information stored in the information storage means, wherein the information storage means comprises the image information. And a second image memory for storing the drawing information, wherein the display means stores the image information stored in the first image memory and the second image memory for storing the drawing information. The composite terminal device, which displays information obtained by adding the drawing information stored in the image memory. 2. The erasing means for erasing the predetermined information stored in the first image memory or the second image memory and for not displaying the erased predetermined information on the display means. The composite terminal device according to claim 1.