CN2137843Y

CN2137843Y - Calling-number displaying device for telephone

Info

Publication number: CN2137843Y
Application number: CN 92229376
Authority: CN
Inventors: 黄学广; 朱秋瑜
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-29
Filing date: 1992-07-29
Publication date: 1993-07-07
Anticipated expiration: 2002-07-29

Abstract

The utility model relates to a calling-number displaying device for a telephone, which makes use of special service function of a program control exchanger. When the utility model is arranged on a called telephone, if a calling telephone calls the called telephone by the program control exchanger, the calling-number displaying device for a telephone can display the calling telephone number; thus, a user knows incoming number before the user receives the call. The utility model comprises a DTMF encoder, a transformation and matrix circuit, a display drive circuit, a controlling circuit, an LCD display and a power supply. The utility model is characterized in that the DTMF information with calling telephone number is sent from the calling telephone by the program control exchanger; under the control of the controlling circuit, the calling telephone number is displayed on a display device of the called telephone by the DTMF encoder, the transformation and matrix circuit, and a display drive circuit.

Description

Calling-number displaying device for telephone

The utility model is a special service function of utilizing stored-program control exchange about cooperation, when being contained in this device on the called phone machine, when caller phone is called out this called phone machine by stored-program control exchange, the device of display of calling telephone number on this device of this called phone machine.

Now retrieve application number and be its name of utility model of 88212655.5 and be called " display of calling telephone number display ".Before use, the user must advance " display " by its requirement establishment with the telephone number of oneself, in case after finishing, others will use this " display ", then will be again oneself telephone number be enrolled " display "; Be somebody's turn to do the number that could demonstrate the other side when " display " wants both sides to install respectively in addition, wherein a side is unkitted then and can not be shown the other side's number; And when both sides' conversation is set up, should " display " just work, take shortcoming and defect such as air time.

The calling telephone number display unit of a kind of novel telephone set that the utility model proposes according to above-mentioned shortcoming.It is to cooperate the special service function of utilizing stored-program control exchange, and this device is contained on the called phone machine.When any caller phone is called out this called phone machine by stored-program control exchange, can both demonstrate calling telephone number on this device of this called phone machine, promptly the user knows the device of calling number before receiving calls.It comprises DTMF decoder, conversion and matrix circuit, display driver circuit, control circuit and LCD display and power supply.It is characterized in that: caller is called out called by stored-program control exchange, this display unit receives the DTMF information that exchange is sent, under control circuit control, through DTMF decoder, conversion and matrix circuit, display driver circuit, on the display unit of called phone machine, put the number that caller phone is shown.

The utility model is realized by following approach:

This device is a hook state at ordinary times, when party call is equipped with the called phone of this device, send the DTMF information that contains the other side's number at this device of ring forward direction by stored-program control exchange, after this device receives this signal, deliver to the DTMF decoder, the DTMF decoder is sent the pulse control signal of an effective DTMF input of expression to control circuit, by control circuit, exports switching circuit and the output of DTMF decoder data that three tunnel control signals are controlled display driver circuit, telephone set respectively.The data-signal that the DTMF decoder is translated into is delivered to conversion and matrix circuit and is transformed into alternative in matrix, be i.e. analogue-key " key entry " operation, triggers display driver, and display driver is output display of calling telephone number under control circuit control.

This device is as the calling party time, and this device also can detect the dtmf signal of being transferred to.When dialling with the telephone set that this device is housed, because it is the caller state that this telephone set monitors this machine by control circuit, control the DTMF decoder this moment, forbids its data-signal output, and directly show the telephone number of being transferred to by the dialing display driver circuit of telephone set itself; When separately as device, when also the telephone set of usefulness dials as caller with it, after the DTMF decoder receives dtmf signal, can be directly by conversion and matrix circuit, display driver circuit, demonstrate the telephone number of dial-out, when this device during at hook state, the shown content of display disappears.

1 pair of example of the present utility model elaborates with reference to the accompanying drawings:

1.DTMF decoder--this decoder is made up of DTMF decoder ic (MT8870) and peripheral cell thereof.When receiving effective dtmf signal, this decoder is to the pulse of the effective dtmf signal input of expression of controller output.Simultaneously, dtmf signal is interpreted into the data-signal of 4bit, the control signal control of the output-controlled system device of this data-signal, and the 4bit data-signal is sent to conversion and matrix circuit.

2. control circuit--this circuit is made up of elements such as integrated circuits such as gate circuit, trigger (CD4069, CD4011, CD4013) and switch triodes.Detect the state of telephone set and detect the pulse that DTMF deciphers effective dtmf signal input, control the switching circuit in data output, display driver circuit and the telephone set network of DTMF decoder respectively.

As shown in Figure 3, the control signal that is input to control circuit has: the hands-free working state signal HFO of the dislodging machine state of telephone set (promptly pick up mobile phone or put mobile phone well) signal HK, hand free set and represent the pulse signal STd of effective DTM input.When the DTMF decoder receives effective dtmf signal, pulse signal STd trigger control circuit, under HK, HFO, the acting in conjunction of STd signal, control circuit is exported three tunnel control signals, one the tunnel is sent to the DTMF decoder, two tunnel output control signal HK that control telephone set dislodging machine switching circuit respectively in addition, make telephone set be in extension state and make display driving integrated circuit enter the output control signal PULES of operating state, remain to always and just recover reset condition till telephone set is hung.

3. conversion and matrix circuit-this circuit mainly is made up of decoding integrated circuit (CD4514B) and 10 switch triode matrixes.The 4bit data-signal of DTMF decoder output is transformed into a corresponding gating signal, drive in the matrix circuit respective switch triode and carry out line and the alignment of selecting respective number and " key in operation; promptly be equivalent on the telephone keyboard this number button and " press " operation, triggering display driver circuit execution corresponding operating.

As shown in Figure 4, from the 4bit data-signal that the DTMF decoder is sent here, maximum can represented 16 numerical signal information.The corresponding numerical signal of each dtmf signal, promptly a 4bit data-signal is represented a number.For example: the data-signal of representing number " 2 " is through IC ₂16 select a decoding to be transformed into the gating signal of respective number " 2 ", and this gating signal is through R ₁₂With switch triode V in the matrix ₂Corresponding row, the alignment of matrix are connected in conducting, promptly are equivalent to number button on telephone keyboard " 2 " and " press " operation.

4. display driver circuit--this display driver circuit is made up of dialing integrated circuit (W91550) and peripheral cell thereof that the band liquid crystal display drives.Operate signal from the acting in conjunction to LCD that export display message under in the control of control circuit and " key entry " of conversion and matrix circuit.

5. display--be to constitute, be used for showing telephone number by LCD plate.This LCD plate can show 10 bit digital.

6. telephone set network mainly is made up of ringing circuit, speaking circuit and dial-up circuit.This circuit is the common phone circuit, just the dialing integrated circuit (IC) that is driven by the band liquid crystal display ₆And peripheral cell is as the dial-up circuit in the telephone set.

Fig. 1 is the calling telephone number device block diagram of the utility model telephone set.

Fig. 2 is the calling telephone number schematic diagram of device of the utility model telephone set.

Fig. 3 is a control circuit schematic diagram in the utility model.

Fig. 4 is conversion and a matrix circuit schematic diagram in the utility model.

Claims

1, a kind of calling telephone number display unit of telephone set, it is to cooperate the special service function of utilizing stored-program control exchange, when caller phone is equipped with the called phone machine of this device by the stored-program control exchange calling, on this device of called phone machine, the number of display of calling telephone set, it comprises the DTMF decoder, conversion and matrix circuit, display driver circuit, control circuit and LCD display and power supply, it is characterized in that: caller phone is called out called phone by stored-program control exchange, this display unit receives the DTMF information that stored-program control exchange sends, under control circuit control, through the DTMF decoder, conversion and matrix circuit, display driver circuit, the number of display of calling phone on the display unit of called phone machine

1.1DTMF decoder is by DMTF decoder ic IC ₁, capacitor C ₁～C ₃, resistance R ₁～R ₁₀, composition such as crystal oscillator G, when receiving effective dtmf signal, this decoder is shown with the pulse of imitating the dtmf signal input to respective table of controller output, simultaneously, dtmf signal is interpreted into the data-signal of 4bit, the control signal control of the output-controlled system device of this data-signal, the 4bit data-signal is sent to this and changes and matrix circuit.

1.2 control circuit is by flip-flop integrated circuit and logic gates integrated circuit (IC) ₃～IC ₅, capacitor C ₄～C ₈, resistance R ₂₁～R ₃₀, transistor V ₁₁～V ₁₅Form Deng element, detect the state of telephone set network and detect the pulse of the effective dtmf signal input of DTMF decoder, control the switching circuit in data output, display driver circuit and the telephone set network of DTMF decoder respectively;

1.3 conversion and matrix circuit are by decoding integrated circuit IC ₂, resistance R ₁₁～R ₂₀, transistor V ₁～V ₁₀Deng composition, the 4bit data conversion of DTMF decoder output is become a corresponding gating signal, drive corresponding switch triode in the matrix circuit, carry out line and alignment " key entry " operation of selecting respective number, promptly " press " operation, trigger display driver circuit and carry out corresponding operating corresponding to this number button on the telephone keyboard;

1.4 display driver circuit mainly is the dialing integrated circuit (IC) that is driven by the band liquid crystal display ₆And the peripheral cell composition, operate under the acting in conjunction in the control of control circuit and " key entry " of conversion and matrix circuit, to the signal of LCD output display message;

1.5 display is to be made of LCD plate, is used for showing telephone number;

1.6 telephone set network mainly is made up of ringing circuit, speaking circuit and dial-up circuit, this circuit is the common phone circuit, just the dialing integrated circuit (IC) that is driven by the band liquid crystal display ₆And foreign element is as the circuit that dials in the telephone set.