Telecommunications – Transmitter and receiver at same station – Convertible
Reexamination Certificate
1994-09-07
2001-03-13
Cumming, William (Department: 2749)
Telecommunications
Transmitter and receiver at same station
Convertible
C455S420000
Reexamination Certificate
active
06201951
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a telephone set with a base station and a control panel detachable therefrom, the base station and the control panel comprising each a means for communicating with each other in a cordless manner.
Such a telephone set is known from EP-A-0396190. That publication describes a telephone set whose keypad for dialling telephone numbers can be detachably connected to both the base station and the operation panel. With prior-art telephone set it is possible to hold a conversation with both the base station and the operation panel, the keypad being optionally connectable to either.
Japanese Patent Application no. 62-110252 further discloses a telephone set with a detachable keypad, in which the keypad comprises an infrared send portion and the telephone set an infrared receive portion, so that it is possible for a person to dial a number while being remote from the telephone set.
Recently, telephone sets have been proposed comprising a display panel, for example, an LCD screen, with texts being displayed on the screen that relate to both a telephone call itself and to a list of names with the associated preselect keys, the number of the calling party, the called telephone number and so on, as well as information about service companies such as viewdata, mail order businesses, banks, travelling agencies and so on. Prior-art telephone set also includes an extensible alphanumeric keypad by which text can be input and displayed on the display panel. In this manner a simple communication with one of said service companies is possible. This prior-art telephone set is marketed by the Applicants under the name of Philips Enhanced Telephone.
Finally, EP-A-0421025 to which U.S. Pat. No. 5,231,381 has disclosed a data processing system consisting of a flat display panel which comprises a so-called touch-screen for inputting data with a finger and a graphic tablet for inputting data with a special pen. With this system it is possible to use a flat, compact unit both for inputting texts and/or figures into a computer with a special pen and inputting texts and data with a finger by touching a virtual keypad. Furthermore, the system can also display texts and figures. As a result, prior-art system is pre-eminently suitable for use as an interactive interface between a user and a (portable) personal computer.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a telephone set which is user-friendly in a manner not achieved thus far with prior-art techniques being implemented.
For this purpose, the invention provides a telephone set of said type, characterized in that the control panel comprises an interactive display panel with a touch-screen and/or a graphic tablet and control electronics for the display panel.
Preferably, the display panel known from EP-A-0421025 is U.S. Pat No. 5,231,381 used as a display panel.
According to a preferred embodiment the control panel also comprises means for holding a telephone conversation, such as a microphone and a loudspeaker or headphone. Alternatively, however, it is possible to use a separate handset for holding a telephone conversation, which handset is connected in a cordless manner or not to the base station. If the control panel and the base station comprise each means for holding a telephone conversation and, for example, a loudspeaker and a microphone, it is possible to couple the display panel to the control panel, so that it can be detached, and arrange the base station in such a way that the display panel can also be coupled to the base station so as to be in the position to telephone via the base station while using the advantageous properties of the interactive display panel.
According to a further embodiment the control panel is suitable for use as a graphic answering machine, which means that a user can read from the screen a message left for him during his absence. A user, if seeking contact with another subscriber who possesses a similar telephone set, can also leave a written message behind in the absence of that subscriber instead of having to record a message, which recording meets with a psychological barrier with many users. A written message may be obtained by operating the virtual keypad or be written by hand or, if the telephone set comprises a means for handwriting recognition, be written by hand and converted into block letters by the telephone set.
According to yet another embodiment the control panel is also suitable for operation as a remote control for audio or video equipment or remote control for other equipment, such as lights, doors and so on, the display panel displaying a virtual control panel of which the user can touch the keys or controllers with a pen or a finger. The base station or the control panel is then to comprise a means capable of communicating with the equipment to be controlled.
According to yet another embodiment the control panel is also suitable for functioning as a keyboard for a personal computer (PC), the control panel then combining the function of keyboard and display screen of a PC. The control panel may then comprise some form of mouse control for moving the cursor on the screen as desired. At the same time the base station is then to comprise all required intelligence and memory capacity of the PC.
It is observed that the telephone set according to the invention clearly distinguishes itself from the recently marketed Personal Digital Assistants (PDA), because a PDA is a complete device with a microprocessor and all relevant peripheral equipment in a housing, an extended memory, a display panel which may have the form of a touch-screen and so on. Such a PDA is extremely costly and rather bulky, whereas the control panel according to the invention comprises only the bare essential intelligence, memory and communication components and it is the base station that comprises all the intelligence, memory capacity and so on.
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Popular Electronics, p. 22, Oct. 1994.
S. Sheng et al, “Portable Multimedia Terminal”, IEEE Communications Magazine, Dec. 1992, No. 12, pp. 64-75.
Japanese “Kokai” 3-76364 (A): Yamanaka, “IC Card Portable Telephone Set”, pub. Aug. 17, 1989.
Japanese “Kokai” 4-86034 (A): Sueda, “Mobile Radio Telephone System”, pub. Mar. 18, 1992.
Duwaer Arne L.
Hafkamp Antonius J. M.
Krexner Christian
Cumming William
Treacy David R.
U.S. Philips Corporation
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