JPS60227558A - Communication terminal equipment provided with composite display section - Google Patents

Abstract

PURPOSE:To attain effective composite display by displaying dial monitor on one layer of a 2-layer display panel at dial input and displaying a communicatable time corresponding to the deposited monetary amount on the one layer at the communication by charge instant accounting. CONSTITUTION:When a terminal operator deposits a charge to a charge processing device 17, the device 17 informs charge storage information to a control circuit 15. Then the circuit 15 transmits terminal call information to an exchange 3 and displays a dialed number on a dial display monitor display panel 12 subjected to dial input 16. Then the circuit 15 commands the return of excess charge to a charge processing device while receiving communication party response information, information representing communication requiring instant accounting and charge information of a unit time and calculates a time possible for communication for the deposited monetary amount at present. The result is displayed graphically on a communicatable time display panel 11. Then data erasing the display content of the panel 12 is fed to a display driver 14 at the same time to prevent the display content of the panel 12 from being overlapped or interferred.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a communication terminal device having an instant charge settlement function, and particularly to a communication terminal equipped with a composite display section suitable for displaying a dial number and available communication time. Regarding.

[Background of the invention]

A public telephone is a typical example of a communication terminal that performs instant charge settlement control. Current public telephones have a communication capability of 1.
Other than the fact that it emits a reminder tone when the card reaches the limit, and that the card phone displays the remaining balance of the card as a 3-digit number.
There is no way to notify users of charge information, making it inconvenient for users to use terminals (public telephones).

Therefore, for the convenience of users, it is desirable to visually display available communication time information on terminals. However, in order to accurately display the available communication time on the terminal, the control section of the communication terminal must either receive the available communication time information from the exchange, or store all charges per unit time for each communication destination and then use dialing. At the same time, it is necessary to have a function to calculate the available communication time from the charge per unit time based on the input amount, so it is actually difficult to realize this function with conventional control circuits that perform relay control. .

Furthermore, when using an international automatic instant call service from a public telephone, dialing of up to 15 digits is required. In this case, it would be convenient to have a dial monitor display to check whether the dialing is correct or incorrect, but if the dial monitor display and available communication time display are placed side by side on the terminal surface, individual The display section becomes smaller and visibility decreases.

In order to improve the above drawbacks, if one display panel is made into a dot matrix type so that any pattern can be displayed on one display panel, the display driver becomes complicated, and especially in the case of a liquid crystal panel, it is difficult to time-divide the applied voltage. There are drawbacks such as a decrease in contrast ratio due to control, etc., and a narrow operating temperature range.

[Purpose of the invention]

An object of the present invention is to improve the above-mentioned drawbacks of the prior art by using a simple display driver to sequentially display the display contents of a composite display section with good visibility and within the same display area as a single display section. An object of the present invention is to provide a communication terminal equipped with a composite display section capable of displaying images.

[Summary of the invention]

In order to achieve the above object, the present invention provides a communication terminal that performs real-time charge settlement control, which includes a two-calendar display panel laminated in two layers, and causes the two-calendar display panel to display a dial monitor during dial input. , and thereafter, in the case of communication with instant fee settlement, the system is configured to display the available communication time for the collected amount.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram of a communication terminal equipped with a composite display section according to an embodiment of the present invention.

1 is a communication terminal, 3 is an exchange, and these are subscriber lines 2
connected by.

11 constituting the communication terminal 1 is a communication available time display panel;
12 is a dial monitor display panel, 13 is a circuit board, 1
4 is a display driver, and 15 is a control circuit that performs display control, charge processing control, terminal status control, and communication control, and is composed of a microprocessor and its peripheral circuits. Also, J6
17 is a dial input section, 17 is a charge processing mechanism, and 18 is a communication interface section. Note that in the figure, arrows indicate the flow of signals.

Next, an overview of the operation of the communication terminal shown in FIG. 1 will be explained.

When the terminal operator inputs the fee into the fee processing mechanism 17, the fee processing mechanism 17 notifies the control circuit 15 of the fee accumulation information. The control circuit 15 receives this.

The communication interface section 18 sends the call information addressed to the terminal to the exchange 3 via the subscriber line 2, and when a dial input is subsequently made from the dial input section 16, the display driver 14 displays display data corresponding to the dial input. and displays the dialed digits on the dial monitor display panel 12.

Communication partner response information, information indicating that the communication requires immediate settlement, information indicating the amount of charge per unit time on the connected line, etc. are controlled from the exchange 3 via the subscriber line 2 and the communication interface unit 18. When the circuit section 15 is reached, the control circuit section 15 instructs the charge processing mechanism 17 to perform charge processing such as returning overage charges, and also uses the charge accumulation information detected from the charge processing mechanism 17 and the unit time sent from the exchange 3. Based on the per charge amount information, the communication time available for the current input amount is calculated. This calculation result is sent to the display driver 14 as display data for displaying a graph, and is displayed as a graph on the available communication time display panel 11. At the same time, the control circuit 15 sends data for erasing the display contents of the dial monitor display panel 12 to the display driver 14, makes the dial monitor display panel 12 transparent, and erases the display contents of the communication available time display panel 11 and the dial monitor display panel 12. Control the display so that they do not overlap or interfere.

By controlling the display in this manner, even if the available communication time display panel 11 and the dial monitor display panel 12 are stacked, it is possible to visually view the image display information from the same display window.

FIG. 2 is an assembled structural diagram of the available communication time display panel 11 and the dial monitor display panel 12 when a liquid crystal display is used as the display panel.

In FIG. 2, 1.1 a to llb are the components of the communication available time display panel 11, lla is the upper polarizing plate,
llb is the upper glass substrate, llc is the upper electrode, ++,
d is the liquid crystal material, lle is the lower electrode, 11f is the lower glass substrate, l1g is the lower polarizing plate, tih is the liquid crystal material 11d
This is a seal that seals between the upper glass substrate 11b and the lower glass substrate 11f. Further, 1.2a to 12h are constituent elements of the dial monitor display panel 12;
is an upper polarizing plate, 12b is an upper glass substrate, 12c is an upper electrode, 12d is a liquid crystal material, 12e is a lower electrode, 12f is a lower glass substrate, 12g is a lower polarizing plate, 12h is a liquid crystal material], 2 d is This is a seal that seals between the upper glass substrate 12b and the lower glass substrate 1.2f.

4 is a reflecting plate. In addition, each of the above electrodes] 1c, 11e,
12c and 12e are transparent electrodes whose shape corresponds to a character pattern or a number segment.

The polarization directions of the upper polarizing plate 11a and the lower polarizing plate 11g of the communication available time display panel 11 are shifted by 90 degrees, and similarly, the polarizing directions of the upper polarizing plate 12a and the lower polarizing plate 12'H of the dial monitor display panel 12 are different from each other by 90 degrees. is also shifted by 90°. However, the polarization directions of the lower polarizing plate 11g of the communication available time display panel 11 and the upper polarizing plate +2a of the dial monitor display panel 12 are the same.

Liquid crystal material 1] d and 12d are respective upper and lower electrodes 1]
, c, ], 1e, ] 2 c,, 1. '2 When no voltage is applied to e, the incident light is
Lower polarizing plate 11 rotated by 0° and shifted by 90° in the polarization direction
Let the incident light pass through g and 12g. When a voltage is applied, the incident light is passed through without being rotated,
The incident light is transmitted to the lower electrodes 11g and 12 whose polarization direction is shifted by 90°.
It becomes impossible to pass g.

Therefore, in the two-layer panel shown in FIG.
The incident light having the polarization direction component 1a is rotated by 90 degrees when passing through the liquid crystal material lid, and then passes through the lower polarizing plate 11g and the upper polarizing plate 12a whose polarization direction matches that of the passing light, Further, when passing through the liquid crystal material 12d, the light is rotated by 90 degrees, passes through the lower polarizing plate 12g whose polarization direction matches that of the passed light, and is reflected by the reflecting plate 4.

The reflected light reflected by the reflection plate 4 is emitted from the upper polarizing plate 11a through a path opposite to the above path. In this way, the incident light is reflected as it is, and the liquid crystal materials 11d and 12
Since d remains a bright white background, both the available communication time display panel 11 and the dial monitor display panel 12 can be considered to be in a non-display state.

When the voltage applied to the pattern-corresponding upper electrode 11c and lower electrode lie of the available communication time display panel 11 is above a certain threshold, the voltage applied to the upper electrode 12c and the lower electrode 12e of the dial monitor display panel 12 is Consider the case where all values are below the threshold. In this case, in the portion where the voltage is applied, the incident light is not rotated when passing through the liquid crystal material lid, so the polarization direction is different from that of the lower polarizing plates 1] and g and is blocked by the lower polarizing plate ttg. The liquid crystal material 1 in this blocked part, that is, the part corresponding to the upper electrode lie and the lower electrode lie to which a voltage higher than the threshold voltage is applied.
1d appears black. Furthermore, all incident light passing through a portion to which no voltage is applied is reflected as described above, and the liquid crystal material in that portion appears white.

Therefore, when looking at the available communication time display panel 11 and the dial monitor display panel 12, the display pattern determined by the upper electrode 11c and the lower electrode lie, that is, the available communication time display pattern on the available communication time display panel 11 is visually observed. .

Conversely, if the voltage applied to all the upper and lower electrodes of the available communication time display panel 11 is less than the threshold value, and a voltage greater than the threshold value is applied to each of the upper and lower electrodes corresponding to the pattern of the dial monitor display panel 12. , only the liquid crystal material 12d corresponding to the portion to which the voltage equal to or higher than the threshold voltage is applied does not rotate the incident light by 90 degrees and is blocked by the lower polarizing plate 12g.

The other portions of the liquid crystal material 12d and all of the liquid crystal material 11d rotate the incident light by 90' and are reflected by the reflecting plate 4.

Therefore, when looking at the available communication time display panel 11 and the dial monitor display panel 12, the upper electrodes 1.2
The display pattern determined by C and the lower electrode 12e, that is, the dial monitor display pattern is visually observed on the dial monitor display panel 12. In other words, the contents of the communicable time panel 11 and the dial monitor display panel 12 can be displayed within a display area equivalent to that of a single display panel.

FIG. 3 is a diagram showing the display surface of the communication available time display panel 11. In Figure 3, "Talk time", numbers 0 to 5, marks ■, mm, 1 minute" are always displayed fixedly during communication, so the upper electrode 1 corresponding to these letters and symbols
The pattern 1c and the pattern of the lower electrode 11g are fixed. A voltage is constantly applied during communication.

FIG. 4 is a diagram showing an example of a state in which the available communication time is displayed on the available communication time display panel 11. As shown in FIG. 4, the available communication time is shown graphically, and is configured so that the available communication time can be recognized with the negative eye. The temporal changes in the graph are shown by the symbols on the graph (each upper electrode 1 corresponding to
1c, by controlling the voltage application to the lower electrode lie.

FIG. 5 is a diagram showing the display surface of the dial monitor display panel 12. In FIG. 5, the characters "The number you dialed" are always displayed in a fixed manner during dial input, so the pattern of the upper electrode 12c and the pattern of the lower electrode 12e corresponding to this character are fixed. has been done. A voltage is constantly applied during dial input.

FIG. 6 is a diagram showing an example of a state in which a dial monitor is displayed on the dial monitor display panel 12. Since the dial monitor naturally changes depending on the dial input, the corresponding upper electrode 12C5 and lower electrode 12e are kanji ``
It is formed into a "day"-shaped segment. This segmental electrode is turned on/off according to the input dial.

In this way, the available communication time display panel 11 and the dial monitor display panel 12 are stacked in two layers so that both panels can be viewed from the same window, and at the same time, only one panel displays the display at the same time. By doing so, a thick display surface can be obtained within a limited display area, and higher visibility can be obtained. Furthermore, since two displays are not placed side by side, there is an advantage that there is less need to move the viewpoint. Furthermore, when the total area of the display windows is small as in this embodiment, the mechanical strength of the display increases. Therefore, it is particularly effective when a certain degree of mechanical strength is required, such as when a public telephone is used by an unspecified number of people without supervision.

In addition, since each two-layer display panel is of a segment type rather than a dot matrix type, there is no need for time-division driving, simplifying the display driver I4, improving the contrast ratio, and reducing the operating temperature range. It becomes wider.

In the above embodiment, an example is shown in which the display device is made of liquid crystal, but it is also possible to obtain the same effect by using a display device such as a discharge tube as the display device. However, in this case, the upper and lower indicators must not interfere with mutual visibility. Furthermore, the number of stacked display devices is not limited to two, and it is also possible to stack even more display devices.

〔Effect of the invention〕

As explained above, according to the communication terminal equipped with the composite display section of the present invention, the display contents of the composite display section can be sequentially displayed with good visibility and the same as that of a single display section using a simple display driver. Can be displayed within the area.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a communication terminal equipped with a composite display according to an embodiment of the present invention, FIG. 2 is a block diagram of a composite display according to an embodiment of the present invention, and FIG. 3 is a communication terminal of FIG. A diagram showing an example of the display surface of the available time display panel, FIG. 4 is a diagram showing an example of the display mode of FIG. 3, and FIG. 5 is an example of the display surface of the dial monitor display panel of FIG. 2. FIG. 6 is a diagram showing an example of the display mode of FIG. 5. 1: Communication terminal, 11: Available communication time display panel, 12:
Dial monitor display panel, 14: Display driver, 15
: Control circuit section, 16: Input dial. 17: Charge processing mechanism. Figure 2 12g 4

Claims (1)

[Claims] (1) A communication terminal that performs instant charge settlement control is equipped with a two-calendar display panel in which two display panels are stacked, and when a dial is entered, a dial monitor is displayed on one layer of the two-calendar display panel, and the charge is instantaneously displayed. 1. A communication terminal equipped with a composite display section, characterized in that the available communication time for the stored amount is displayed on another layer when communicating by payment.