JP2976792B2 - Email system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic mail system comprising a plurality of terminal devices and an electronic mail device for accommodating each terminal device and transmitting mail information such as image information to each of the accommodated terminal devices. About.

[0002]

2. Description of the Related Art Generally, an e-mail device constituting an e-mail system contains a plurality of terminal devices.
When image information addressed to each accommodated terminal device arrives, the corresponding terminal device is called to transmit the image information. That is, when image information from a facsimile device is transmitted to a terminal device accommodated in the e-mail device via a telephone line to the e-mail device, the e-mail device receives the image information and stores it in a memory. I do.
Then, when the corresponding terminal device is called, and the terminal device responds, the image information is read out from the memory, transmitted, and displayed on the display of the terminal device.

[0003]

By the way, the screen size of the display of such a terminal device is generally small, and there is a problem that not all images can be displayed even if image information is transmitted from an electronic mail device.

[0004] Accordingly, it is an object of the present invention to provide a method for displaying all image information and the like transmitted from an electronic mail device on a display having a screen size smaller than the size of the received image.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a terminal device which accommodates a plurality of terminal devices and transmits image information to each of the accommodated terminal devices. In an e-mail system including an e-mail device to be displayed on a display device, when image information is transmitted to a terminal device, a determination unit that determines the size of a display screen of the terminal device, and a determination unit that determines the size of the display screen. An image information transmitting unit that divides and compresses image information in accordance with the output and transmits a divided / compressed signal at the time of the division and compression to the corresponding terminal device together with the divided and compressed image information; A transmitting means for transmitting the size information of the display screen of the terminal to the mail device, and dividing the image information when receiving the image information from the e-mail device.
An image information reproducing means for reproducing based on a compressed signal is provided in a terminal device.

[0006]

When the image information is transmitted to the terminal device, the size of the display screen of the terminal device is determined. Information is divided and compressed, and the divided / compressed signal at the time of the division / compression is transmitted to the terminal device together with the divided / compressed image information.
Playback is performed based on the compressed signal. As a result, when image information or the like transmitted from the e-mail device is received, all images can be displayed on a display device having a screen smaller than the size of the image.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 5 is a block diagram showing one embodiment of a terminal device constituting the electronic mail system of the present invention. In FIG. 1, the terminal device 1 is provided with a CPU 11, and the CPU 11 has an LCD unit 1 for performing various displays.
2 and the A / D converter 13 are connected. Where A
The / D conversion unit 13 converts the voltage level signal from the touch key unit 14 into a digital signal and transmits the digital signal to the CPU 11. The touch key section 14 is formed of a group of resistors and is formed integrally with the LCD unit 12 described above. When the display area of each section of the LCD unit 12 is pressed, each of the touch keys 14 in the X and Y directions corresponds to the pressed position. A voltage level signal is generated, and the voltage level signal is converted into a digital signal by the above-mentioned A / D converter 13 to be an operation signal.

The CPU 11 is connected to a buzzer 15, a clock unit 16, and a modem unit 17 that ring when an incoming call is received. Here, the modem unit 17 sends the data signal from the CPU 11 to the wireless transmission / reception unit 18 to transmit the data signal to an e-mail device to be described later via the antenna AT1, and transmits the data signal from the e-mail device via the antenna A and the radio transmission / reception unit 18. Is received, the received data is transmitted to the CPU 11. In addition, since the terminal device 1 is portable, a battery 19 is used as a power supply, and a power supply control unit 20 converts an output voltage of the battery 19 and supplies the output voltage V to each unit of the device.

Next, FIG. 3 is a diagram showing a configuration of an electronic mail device 3 accommodating such a terminal device 1. The electronic mail device 3 includes a control unit 31, a gateway 32, and a memory 3.
3. It comprises a transmission / reception unit 34 and the like. A plurality of lines L such as telephone lines are connected to the gateway 32, and an exchange network 4 such as an exchange is connected to the lines L. Further, the facsimile device 5 and the like are connected to the exchange network 4.

[0010] Here, the CPU 11 of the terminal device 1 has an A / D
When an operation signal is input from the touch key unit 14 via the conversion unit 13, predetermined processing is performed and the processing result is displayed on the LCD unit 12. When this display screen is transmitted to, for example, the partner terminal device, the modem unit 1 is called after calling the partner terminal device via the electronic mail device 3 which is the center device.
7. The packet is transmitted as packet data to the electronic mail device 3 via the wireless transmission / reception unit 18 and the antenna AT1. As a result, the display screen data is transmitted from the electronic mail device 3 to the partner terminal device and displayed on the LCD unit of the partner terminal device. The display screen data transmitted from the partner terminal device is received by the CPU 11 via the antenna AT1, the wireless transmission / reception unit 18 and the modem unit 17, and is similarly displayed on the LCD unit 12. As described above, the terminal device can perform two-way communication of a data signal such as display screen data with the partner terminal device.

When facsimile information addressed to a terminal device accommodated in the electronic mail device 3 arrives at the electronic mail device 3 from the facsimile device 5 via the exchange network 4, the control unit 31 in the electronic mail device 3 Through the memory 33. Then, the terminal device is called and the facsimile information stored in the memory is transmitted to the terminal device via the transmitting / receiving section 34 and the antenna AT.

Here, the display screen size of the LCD unit 12 of the terminal device 1 is previously transmitted from each terminal device and stored in the electronic mail device 3, and the electronic mail device 3 transmits the facsimile information from the facsimile device 5 to the facsimile information. Is received, the facsimile information is transmitted according to the display screen size of the terminal device. That is, when the width of the display screen of the terminal device 1 is smaller than the width of the facsimile screen, the facsimile information stored in the memory 33 is divided according to the display screen of the terminal, for example, as shown in FIG. The data is read from the memory 33 and transmitted to the terminal device 1 in the transmission order indicated by. Further, when the display screen of the terminal device 1 is smaller, the divided facsimile information is compressed so as to conform to the display screen of the terminal and transmitted to the terminal device 1 as shown in FIG.

FIG. 1 is a flowchart showing the operation of the control unit 31 of the electronic mail device 3 for transmitting facsimile information and the like in accordance with the screen size of the terminal device.
When mail information such as facsimile information received from the facsimile device 5 or the like and stored in the memory 33 is transmitted to the corresponding terminal device, first, in step ST1, the size of the display screen previously transmitted from the corresponding calling terminal device in advance is determined. Judge. If the width of the display screen of the corresponding terminal is equal to the width of the facsimile screen (FAX screen) and becomes “Y” in step ST2, or if the width of the display screen of the corresponding terminal is larger than the width of the facsimile screen and “Y” in step ST3 In step ST4, the mail information such as facsimile information is read from the memory 33 in step ST4 and transmitted to the corresponding terminal device via the transmission / reception unit 34 and the antenna AT2 as it is.

If the display screen width of the corresponding terminal device is smaller than the width of the facsimile screen and becomes "Y" in step ST5, the divided / compressed signal is first transmitted to the corresponding terminal device in step ST6, and then in step ST7. The facsimile information and the like stored in the RAM 33 transmitted to the corresponding terminal device are divided and read out. If the terminal display screen is smaller than the divided facsimile screen, the divided and read facsimile information is further compressed and Send to terminal device.

Next, the operation of the terminal device 1 responding to the operation of the electronic mail device 3 will be described with reference to the flowchart of FIG. The CPU of the terminal device 1 stores the size of the display screen of the LCD unit 12, and when inquiring the electronic mail device 3 about the presence or absence of mail information such as facsimile information addressed to the own terminal, or in step ST11 when idling. Transmits the model name of the terminal itself and the display screen size to the electronic mail device 3.

Next, when facsimile information or the like is received from the electronic mail device 3, it is determined in step ST12 whether or not the above-mentioned divided / compressed signal has been received. When the display screen of the own terminal is smaller than the facsimile screen, therefore, when the divided / compressed signal transmitted from the electronic mail device 3 is received and the determination in step ST12 becomes “Y”, the divided image subsequently transmitted from the electronic mail device 3 In step ST13, the mail information such as the compressed facsimile information is received via the antenna AT1, the wireless transmission / reception unit 18 and the modem unit 17, and stored in the RAM 22. Then, the facsimile information stored in the RAM 22 is reproduced based on the divided / compressed signal already transmitted in step ST14, and
The information is sequentially displayed on the CD unit 12. When the information to be displayed is character data, the information is sequentially displayed at a speed at which the data can be viewed.

If the divided / compressed signal is not received before receiving mail information such as facsimile information from the electronic mail device 3 and the determination in step ST12 is "N", the display screen of the terminal device 1 is large. Therefore, the mail information transmitted from the electronic mail device 3 is stored in the step ST.
When the mail information is received at 15, the mail information is displayed on the LCD unit 12 as it is.

As described above, when the electronic mail device 3 transmits mail information such as facsimile information to the terminal device 1, the electronic mail device 3 divides and compresses the mail information transmitted according to the display screen size of the terminal device. In addition to transmitting the mail information to the corresponding terminal device and receiving the mail information on the terminal device side, the received mail information is reproduced and displayed on the LCD unit 12 in accordance with the divided / compressed signal transmitted from the electronic mail device prior to the transmission of the mail information. It is something to do. As a result, image information such as facsimile information is L
All are displayed on the display screen of the CD unit 12 without missing.

[0019]

As described above, according to the present invention, when image information is transmitted to a terminal device, the size of the display screen of the terminal device is determined, and for example, the image is transmitted to the display screen. When it is determined that the width of the image is large, the image information is divided and compressed, and the divided / compressed signal at the time of the division and compression is transmitted to the terminal device together with the divided and compressed image information. -Since the reproduction is performed based on the compressed signal, when the image information or the like transmitted from the electronic mail device is received, all the images can be displayed on the display device having a screen smaller than the size of the image.

[Brief description of the drawings]

FIG. 1 is a flowchart showing an operation of a main part of an electronic mail device constituting an electronic mail system according to the present invention.

FIG. 2 is a flowchart showing the operation of the terminal device 1 in response to the operation of the electronic mail device.

FIG. 3 is a block diagram illustrating a configuration of an electronic mail device.

FIG. 4 is a diagram showing a transmission status of mail information to a terminal device of the electronic mail device.

FIG. 5 is a block diagram showing a configuration of the terminal device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal device 3 E-mail device 4 Switching network 5 Facsimile device 11 CPU 12 LCD unit 22 RAM 31 Control unit 33 Memory

Claims (1)

(57) [Claims] An e-mail system comprising: a plurality of terminal devices; and an e-mail device that accommodates each of the terminal devices and transmits image information to each of the accommodated terminal devices to display the image information on a display of the terminal device. Determining means for determining the size of the display screen of the terminal device when transmitting the image information to the terminal device; and dividing and compressing the image information according to the determination output of the determining device. Image information transmitting means for transmitting the divided / compressed signal to the corresponding terminal device together with the divided and compressed image information, and
Transmitting means for transmitting the size information of the display screen of the terminal to the electronic mail apparatus; and image information reproducing means for reproducing the image information based on the division / compression signal when receiving the image information from the electronic mail apparatus An electronic mail system comprising: