Abstract:
An electronic telephone book comprises a central processing unit, interface circuitry for coupling the central processing unit to a telephone line and a display comprising output circuitry to output information and control graphics and input circuitry for generating control signals responsive to user interaction with the control graphics.

Description:
This is a Continuation of application Ser. No. 08/083,209 filed Jun. 25, 1993; which is a Continuation of Ser. No. 07/722,571, filed Jun. 27, 1991 now abandoned. 
    
    
     TECHNICAL FIELD OF THE INVENTION 
     This invention relates in general to telecommunications, and more particularly to an electronic telephone book. 
     BACKGROUND OF THE INVENTION 
     Each year, hundreds of millions of telephone books are reprinted for distribution to households and businesses around the world. The telephone books are updated yearly, even though the dynamic portion of the telephone book (that portion which actually changes) is extremely small. Consequently, an enormous amount of energy and natural resources are consumed in order to revise a relatively small amount of information. 
     Several computer programs now provide autodialing features, which allow the user to generate a list of his or her most frequently called numbers. A selected number may be dialed by pressing a button. Autodial features are also found on many phones, wherein each button corresponds to a frequently dialed number. 
     Autodialing features, while reducing the frequency with which the telephone book is used, does not relieve the necessity for updated information. Hence, autodialing phones and computer programs do not diminish the need for updated telephone books on a yearly basis. 
     Another problem with telephone books is the arrangement of advertisements in the yellow pages. To conserve money, a business operation will normally advertise in only one section. Therefore, a store which sells appliances, video, audio and photographic products will normally advertise in only section, or will place a advertisement in one section and have a plain listing in the other sections. Consequently, a potential customer searching for a particular good or service may not get a full listing of providers from the yellow pages. 
     Therefore, a need has arisen for a replacement to the traditional telephone book which reduces the waste involved in yearly updates to the telephone book and which provides more advanced searching capabilities. 
     SUMMARY OF THE INVENTION 
     In accordance with the present invention, an electronic telephone book is provided which eliminates substantial problems associated with the prior art. 
     The electronic telephone book comprises a central processing unit and telephone interface circuitry for coupling a central processing unit to a telephone line. A display comprises output circuitry to output information and control graphics and input circuitry for generating control signals responsive to user interaction with the control graphics. 
     The present invention provides significant advantages over the prior art. The electronic telephone book replaces the telephone directory and yellow pages without losing the ability to display graphic advertisements as well as text line listings. The size of the electronic telephone book may be significantly less than that of a medium-sized metropolitan telephone book. Information may be retrieved from the telephone company&#39;s central office, thereby eliminating the need to provide updates to telephone books. Searching can be done electronically on a number of fields such as name, category or keywords, thereby providing a more accurate listing of yellow page advertisers. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     For a more complete understanding of the present invention, and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which: 
     FIGS.  1   a-c  illustrate top, front and back plan views, respectively, of the electronic telephone book; 
     FIG. 2 illustrates a schematic representation of the preferred embodiment of the electronic circuitry of the electronic telephone book; and 
     FIGS.  3   a-f  illustrate use of the electronic telephone book. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The preferred embodiment of the present invention and its advantages are best understood by referring to FIGS.  1 - 3  of the drawings, like numerals being used for like and corresponding parts of the various drawings. 
     FIGS.  1   a-c  illustrate top, front and back plan views of the exterior of the electronic telephone book  10 , respectively. The display  12  is partitioned by the software to provide a viewing area  12   a  and a control area  12   b . The size of the areas may be modified during the operation of the telephone book as needed. Viewing area  12   a  outputs text and graphics to the user while control area  12   b  outputs visual “software buttons”  14  which the user may use to interact with the electronic telephone book  10 . Typically, the display  12  is an LCD (liquid crystal display), but could also be an LED or a thin-film active cell display, among other technologies. To receive inputs from the user, IR (infrared) or other light detection sensors, acoustical wave glass or a contact membrane may be provided. Hence, physical contact with the display  12  may be detected and the location of the contact will indicate the desired action. 
     In FIG.  1   a , several software buttons  14  are shown: Escape, Clear, Page Up, Page Down, AutoDial, Next, Menu, Select, and cursor control keys. The actual keys displayed during operation of the system will depend upon the application being performed. While a standard keyboard could alternatively be coupled to the electronic telephone book, the software button provide superior flexibility and control, as will be shown in greater detail hereinbelow. 
     Shown in FIG.  1   b , the electronic telephone book  10  further comprises a floppy disk drive  16  and a CD ROM drive  18 . A brightness adjust  20  allows the user to adjust the brightness of the display. In FIG.  1   c , the bottom of the electronic telephone book  10  provides an on/off switch  22 , a phone jack  24  and an AC plug  26 . 
     In operation, the electronic dialer  10  is coupled in parallel with a standard telephone to the household or business lines. Alternatively, the phone and the electronic telephone book may be an integral unit. The user operates the electronic telephone book  10  via the software buttons  14  to look up and to dial phone numbers. The drives  16  and  18  may be used to provide programming code for the electronic telephone book  10  or to store information locally within the electronic telephone book  10 . For example, floppy drive  16  may contain data regarding the user&#39;s most frequently dialed numbers, along with address and personal information. CD ROM drive  18  may contain mass data, such as important phone numbers throughout the United States. Drives  16  and  18 , however, are optional to the electronic telephone book  10 . 
     Importantly, the electronic telephone book  10  may communicate with a central office of the telephone company to retrieve information for the user. Thus, the electronic telephone book  10  may retrieve information from the central office, such as phone numbers and advertisements, and may update information stored in the local drives  16  and  18 . 
     FIG. 2 illustrates a block diagram of the electronic telephone book  10 . A CPU  28  is coupled to ROM  30 , RAM  32 , modem  34 , display controller  36  and drive interface  38 . Modem  34  is connected to A/D converter  40  which is connected to the phone jack  24  and phone  42 . Both the A/D converter  40  and phone  42  are coupled to the phone lines  44 . The display controller  36  is coupled to display  12 . Drive interface  38  is coupled to drives  16  and  18 . An expansion RAM  48  is coupled to the RAM  32 . A voice chip  49   a  is optionally coupled to CPU  28  and to speaker  49   b.    
     In operation, the CPU  28  operates a program stored in ROM  30 . Additional program code may be stored in RAM  32 , expansion RAM  48  and drives  16  and  18 . The CPU  28  outputs data to the display  12  and receives input commands from the display  12  through display controller  36 . Communications with the telephone lines is performed through modem  34  and A/D converter  40 . 
     FIGS.  3   a-f  illustrate screens which could be used in operation of the electronic phone book. In FIG.  3   a , the main menu is shown. It should be noted that this menu is for exemplary purposes only, and different menus may be provided for different applications. For example, the menu for a implementation of the electronic telephone book  10  used primarily in a business situation would be different than the menu for an electronic telephone book used primarily for home use. 
     In the embodiment illustrated in FIG.  3   a , the main menu provides four selections: “Friends”, “Business”, “Yellow Pages” and “Utilities”. Instructions are provided at the bottom of viewing area  12   a  to aid the user. In this case, three software buttons  14  are provided: Up and Down cursor keys  54  and  56 , respectively, and a Select button  58 . The user may choose one of the categories by using the cursor keys  54  and  56 ; the chosen category is highlighted. Once the proper category is chosen, the Select button  58  is pressed. 
     FIG.  3   b  illustrates an exemplary display after choosing the “Friends” category. After choosing the “Friends” category, a list of names is provided. The software buttons  14  include alphabetical look-up keys  60  which allow the user to move the display to start at a certain letter, an Autodial key  62 , Page Up and Page Down keys  64  and  66 , Home and End keys  68  and  70 , cursor control keys  72 , Menu key  74  and Select key  76 . The Page Up and Down  64  and  66  change the display to read the previous or next page of output. The Home key  68  brings the display to the first entry in the list and the End key  70  brings the display to the last entry in the list. Cursor control keys  72  allow the user to highlight a desired name on the page. The Menu key  74  returns control back to the previous menu (i.e., to the main menu) and the Select key  76  enters the highlighted name as the desired selection. In this embodiment, pressing the Select key may provide additional information about the highlighted person, such as address and other information. 
     The “&lt;Look-Up New Number&gt;” selection allows the user to look up a number not in the displayed list. FIG.  3   c  illustrates a screen generated in connection with selecting the &lt;Look-Up New Number&gt; selection. In this instance, the control area  12   b  provides a keyboard in which data can be entered for retrieving a phone number. As can be seen in FIG.  3   c , the user need not supply all the data. 
     In FIG.  3   d , a list of the names meeting the criteria is provided to the user. In order to generate the list, the electronic telephone book  10  sends the information entered by the user to the telephone company&#39;s central office which maintains the database of telephone listings. The database is searched for matching entries and equivalents. Thus, in FIG.  3   d , both Dallas and Garland (a Dallas suburb) are searched as well as the names “Timothy”, “Tim” and “T.E.”. The user may choose from these names using the cursor keys  82  and  84  and the Page Up and Page Down keys  86  and  88 . When the Select button  90  is pressed, the highlighted name will be entered into the user&#39;s local database of telephone numbers (in this case, the “Friends” database). 
     FIG.  3   e  illustrates a yellow pages directory listing. This listing would be generated through the yellow pages selection on the main menu, in a similar manner to the procedure shown in FIG.  3   c . The user would be able to search the phone listings at the telephone company&#39;s central office, by name, or by keyword, as shown in FIG.  3   e . In the example of FIG.  3   e , the keyword “locksmith” was used which generated a listing of vendors in the user&#39;s area. The database search could include much greater detail between vendor and their respective products and services than allowed by the yellow pages. For example, using “toaster” as a keyword would generate a list which would include hardware stores, appliance stores and department stores. Some listings are designated by an asterisk (*) which informs the user that an advertisement is associated with the listing. The advertisement may be viewed by pressing the “ADV” button  92  after highlighting the listing. Alternatively, a desired listing may be automatically dialed by pressing the “Autodial” button  94 . 
     FIG.  3   f  illustrates an exemplary utilities menu. The “Update Listings” selection searches the listings in the user&#39;s local memory to determine whether the phone numbers are current. In the preferred embodiment, a global search for all listings, a search for selected listings, and a search for a single listing are supported. The “Tone/Pulse” selection allows the autodialing to be performed in either DTMF tones or pulses. Other utilities may also be provided. 
     In FIG. 2, an optional voice chip and speaker  49   a-b  are illustrated. The voice chip would allow the visually impaired to find a desired listing. 
     Additionally, the flexibility of the electronic telephone book  10  enables it to provide additional services with the evolution of telecommunication technology. For example, with an ISDN network, the display  12  could generate video as well as graphics taking advantage of the broad-band digital capacity of ISDN. Such a feature would allow, for example, a video advertisement to be output to the user. 
     The present invention provides significant advantages over the prior art. First, the need for telephone books is eliminated, since the most current listings may always be provided through the telephone company&#39;s central office. Second, the invention provides local databases which store the most frequently called numbers and allow autodialing for ease of use. Third, the electronic telephone book is customizable to a variety of applications. 
     Although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.