DE19732916A1 - Mobile telecommunications terminal with hands-free operation - Google Patents

Abstract

The mobile telecommunications terminal (MF) includes a receiver inset (HK) and a microphone (M), which work together with a conversation circuit (SC), whereby a lower volume level is provided by the receiver inset for an operation of the telecommunications terminal at the ear of a subscriber. An operating element (BE) is arranged in such way, that the conversation circuit is switched in a condition of an existing telephone conversation to a high volume level produced by the receiver inset for a hands-free operation. An additional dynamic speaker may be arranged at the back of the telecommunications terminal for producing the high volume level signal.

Description

The subject of the registration concerns a mobile telephone device with the monitoring / handsfree feature.

In conventional mobile telephone devices, the Lei Performance feature open listening in connection with Hands-free calling is not possible via the handset.

DE 44 16 550 is a circuit arrangement for remote Speakers known with the feature listening.

The subject of the registration is the task of a To create a handset for a mobile telephone device, which has an option for open listening / speakerphone mode.

The subject of the registration solves the task through the features of claim 1 or claim 2.

The subject of registration brings a loudspeaker / hands-free radio tion in a mobile telephone device without a Hand would be required to hold and a call several participants with themselves.

The subject of registration takes advantage of the knowledge that the sensitivity of the conventionally used microphone is already sufficient for hands-free operation.

The subject of registration is hereinafter referred to as execution example to the extent necessary for understanding hand described in more detail by a figure. It shows:

Fig. 1 is a schematic representation of the mobile telephone device according to the application.

The mobile telephone device shown in FIG. 1 faces the subscriber with its front side V when operated as a handset on the ear of a subscriber. The Fernspre chendgerät has a hearing capsule HK and a microphone M on its front behind sound passages. In the telephone device, a device circuit GS is net angeord, which has a speech circuit SC. The earpiece and the microphone interact with the speech circuit SC. The device circuit is powered by a secondary element. The device circuit has a radio interface, which is completed via an antenna A and which may be operated according to the DECT standard or the GSM standard. The device circuit is connected to a display device DP (for: display) arranged on the front of the mobile telephone set for displaying alphanumeric characters and / or graphic elements. The mobile telephone device can be used in the conventional manner as a handset.

According to the application, the mobile telephone device is a Possibility for loudspeaker / hands-free operation.

By pressing an operating element BE the sound Hearing / hands-free operation triggered. It can be provided that Loudspeaker / hands-free operation by activation and selection in a menu shown on the display device DP is triggered. It can also be provided that the sound Hearing / hands-free operation only during an existing telephone can be triggered. Triggering the function Open listening / hands-free calling is by means of a toggle switch KS held until the function is reset by pressing again the control element or by exiting the current one Call connection by pressing the on / off switch HO (for: hook).  

According to a special embodiment of the subject of the application This is triggered by the monitoring / handsfree function by increasing the output power of the speech circuit of the Volume levels in the sizes emitted by the earpiece order raised 12 dB. An increase in output power the speech circuit can be inserted by an additional Amplifier stage and / or by lowering the input reference damping is given.

The speech circuit likes a language scale SW for compliance the whistling point distance and for decoupling the signal paths exhibit.

According to a special embodiment of the subject of the application is on the back of the mobile telephone device dynamic behind a sound outlet opening of the housing shear converter DW arranged. By operating the control panel BE becomes the dynamic converter of the speech circuit supplied with a signal for a loudspeaker operation. At This arrangement is the focus of the sensitivity spectrum of the microphone and the volume spectrum of the dy Named transducer on opposite sides of the mo Bilen telephone communication device, which is a priori there is an increased whistling point distance. To comply with a a whistle balance SW in the be implemented.

In a further development of the subject of registration, it is provided that that about the dynamic converter during the period in the mobile telephone device is switched off and for is ready to receive a call, a ringer that rings you incoming call signals, can be given.

Operating a telephone is in open listening / hands-free mode talk on the mobile telephone device at a distance given by the user from a meter. The user can So put the mobile telephone device in front of you is there  with released from holding the mobile telephone terminal and has his hands free.

The mobile telephone device may have a NiMH (nickel Metal hydride) accumulator can be supplied with operating voltage. The higher charge capacity of the NiMH battery compared to a conventionally used NiCd (nickel cadmium) battery One effect is caused by increased current consumption in the loudspeaker drove due to shortening the operating time.

Claims (6)

1. Comprehensive mobile telephone device (MF) with the feature open listening / hands-free calling

• an earpiece (HK) and a microphone (M) which interact with a speech circuit (SC), the earpiece being able to deliver a low volume level for operation of the telephone device on the participant's ear,
  characterized in that
• - An operating element (BE) is arranged in such a way that in the state of an existing telephone call, the speech circuit device can be switched to a high volume level emitted by the earphone for listening operation.

2. Comprehensive mobile telephone device (MF) with listening / hands-free feature

• - An earpiece (HK) and a microphone (M), which cooperate with a speech circuit (SC) and which are arranged on the front side (V) of the telephone device for operating the telephone device as a handset, with the earpiece having a low volume level for operation of the telephone device at the ear of the subscriber can be output,
  characterized in that
• - A dynamic sound transducer (DW) is arranged on the back (R) of the telephone device
• - An operating element (BE) is arranged such that the dynamic transducer of the speech circuit with a Si signal for a listening operation with a high volume level can be added.

3. Mobile telephone device according to claim 2 marked by a dynamic sound transducer such that in the state of a a ringing tone can be made for a call that does not exist. 4. Telephone device according to one of the preceding claims,  characterized, that the speech circuit a language scale (SW) for compliance of the whistling point distance. 5. Telephone device according to one of the preceding claims marked by, a control element such that the telephone device only in State of an existing phone call to one Loudspeaker / hands-free operation is switchable. 6. Telephone device according to one of the preceding claims characterized, that the telephone device is replaced by a NiMH (nickel metal Hydride) accumulator (AC) is powered.