DETAILED DESCRIPTION OP THE PREFERRED EMBODIMENTS

[0025] Referring to FIG. 1, a main body 100 of the portable telephone is provided with a display 101 such as a liquid crystal display (LCD) and a keypad 102 having a layout of various keys. The display 101 and the keypad 102 are provided in a main surface of a housing of the main body 100 .

[0026] The keypad 102 is comprised of a first part and a second part. The first part consists of arrow keys 103 and an Enter key 104 and a second part consists of a menu key 105 and other keys including a ten-key pad. A speaker 106 is disposed as a telephone receiver at an upper portion of the main body 100 and a microphone 107 is disposed as a telephone transmitter at a lower portion of the main body 100 . Further, an antenna 108 is provided on the upper surface of the main body 100 and a battery pack 109 is detachably provided on the rear surface of the main body 100 .

[0027] In the first part of the keypad 102 , four arrow keys 103 corresponding to up, down, left and right directions are disposed to surround the Enter key 104 . In the main body 100 , a center key contact corresponding to the Enter key 104 and four key contacts corresponding to the four arrow keys 103 are provided with the center key contact surrounded by the four key contacts. By selectively depressing the arrow keys 103 , a highlight bar displayed in the display 101 can be moved horizontally and vertically on the screen, that is, in up, down, left and right directions, as described later. An information item positioned by the highlight bar is selected and executed by pressing the Enter key 104 . For example, a calling is made or a menu item is carried out. The Enter key 104 can also function as a normal calling key.

[0028] A user moves the highlight bar to a desired information item displayed on the display 101 by selectively operating the up, down, left and right arrow keys 103 , with a thumb, for example. When the Enter key 104 at the center is depressed with the same thumb immediately after the highlight bar has reached the desired information item, an operation corresponding to the desired information item can be executed. In other words, it is possible to carry out the necessary operation by just placing the finger at the first part of the keypad 102 without moving the finger to a long distance.

[0029] Although the four arrow keys 103 are used to move the highlight bar on the display 101 in the four directions of up, down, left and right directions in this case, it is also possible to provide only two arrow keys to move the highlight bar in only two directions of left and right or up and down directions. The number of the arrow keys 103 can be determined according to the volume of information that can be displayed in the display 101 of the telephone. For example, if the display 101 can display only about one to three names of destinations in a telephone directory function, only two arrow keys 103 are sufficient to search for a desired telephone number in two directions.

[0030] Further, according to the present embodiment, a spacing between the first part and the second part of the keypad 102 causes movement and enter operations by the arrow keys 103 and Enter key 104 of the first part to be made easier. It is also possible to form the first part and the second part within one area of the keypad 102 so long as the easiness of operation is not lost. It is needless to mention that even in this case the arrow keys 103 and the Enter key 104 are disposed close to each other as the first part.

[0031] Referring to FIG. 2 , inside the main body 100 of the portable telephone, there are built a transceiver 201 , a channel controller 202 , a speech processor 203 and a microprocessor (CPU) 204 which provide a radio telephone function. The antenna 108 is connected to the transceiver 201 , and the microphone 107 and the speaker 106 as a telephone transmitter and a telephone receiver respectively are connected to the speech processor 203 . The LCD display 101 is connected to an LCD controller 205 which is controlled by the microprocessor 204 , and various kinds of key operation signals of the keypad 102 are input to the microprocessor 204 through an input controller 206 . In the present embodiment, there is provided a directory memory 207 storing registered names and telephone numbers of persons to communicate with, and these names and telephone numbers are read and written under the control of the microprocessor 204 . The operation of the present embodiment will be explained in detail with reference to examples shown in FIGS. 3 to 6 .

[0032] Referring to FIG. 3 and FIGS. 4 A- 4 E, it is assumed that the Enter key 104 also has a function of a normal calling function, that is, registered names or a set of registered names and telephone numbers are displayed on the display 101 by operating the Enter key 104 .

[0033] At first, when the microprocessor 204 is in a waiting status (YES at step S 301 ) and also when a key operation is not carried out (NO at step S 302 ). date and time information as shown in FIG. 4A is being displayed in the display 101 .

[0034] When the Enter key 104 is depressed in this waiting status (YES at step S 302 ), the microprocessor 204 reads out data from the directory memory 207 (step S 303 ) and displays a plurality of names arranged in an alphabetical order, with the highlight bar at an initial position, in the display 101 (step S 304 ).

[0035] For example, names starting from ‘A’ (Japanese alphabet) are displayed in the left column of the display 101 : Ando, Ikeda, Itoh, Ueno, Okada, and so on. Names starting from ‘Ka’ (Japanese alphabet) are displayed In the middle column: Kudoh and Koike. Names starting from ‘Sa’ (Japanese alphabet) are displayed in the right column: Sasaki, Sakai, Satoh, Shimada and so on, as shown in FIG. 4B .

[0036] In English, similarly, names may be displayed in the display 101 with starting from letter A on the left column, names starting from letter B in the middle column and names starting from letter C in the right column.

[0037] A highlight bar 401 inversely displays the highlighted name, with a left column top name initially highlighted, and a telephone number corresponding to the highlighted name is displayed always at the bottom row on screen.

[0038] Then, when one of the arrow keys 103 is depressed (YES at step S 305 ), the highlight bar 401 moves In a direction of the depressed arrow key 103 (step S 306 ). For example, when the arrow key 103 indicating the down direction is depressed two times, the highlight bar 401 moves to “Itoh” two rows below “Ando” and a telephone number of “Itoh” is displayed at the bottom row as shown in FIG. 4C .

[0039] In the case of English names arranged in alphabetical order on screen, for example, Anderson, Ando, Annice, and Arward, “Anderson” is initially highlighted. And when the arrow key 103 indicating the down direction is depressed two times, the highlight bar 401 moves to “Annice” two rows below “Anderson” and a telephone number of “Annice” is displayed at the bottom row on screen.

[0040] When the highlight bar 401 moves in up, down, left and right directions within the current display area of the display 101 (NO at step S 307 ), only the highlight bar 401 moves according to operations of the arrow keys 103 (steps S 305 to S 307 ).

[0041] When the highlight bar 401 moves to the outside of the current display area of the display 101 (YES at step S 307 ), the microprocessor 204 scrolls the display screen of the display 101 so as to display hidden data by the arrow keys 103 (step S 308 ). In this way, the highlight bar moves to the name which is at a location determined by direction and number of depressing of the arrow key 103 . For example, when the arrow key 103 of the down direction is depressed by further four times, the display data in the column of names starting from Japanese alphabet ‘A’ is scrolled down to move the highlight bar 401 from the position of “Itoh” to “Okada”, a fourth name below “Itoh”, as shown in FIG. 4D . In this embodiment, only the display data of the column in which the highlight bar 401 is located is scrolled, allowing easy operation in case of searching other columns.

[0042] On the other hand, when the arrow key 103 of the right direction is depressed three times in the state that the highlight bar 401 is at the initial position, the display data is scrolled in the right direction at the third time of depressing the arrow key, and the highlight bar 401 moves from “Ando” to “Takada”, a third name to the right, as shown in FIG. 4E .

[0043] After moving the highlight bar 401 to a name to whom a user intends to make a call by operating the arrow keys 103 , the user depresses the Enter key 104 surrounded by the arrow keys 103 (YES at step S 305 ). Then, the microprocessor 204 starts a calling operation by using a telephone number corresponding to the selected name (step S 309 ).

[0044] Referring to FIG. 5 and FIGS. 6 A- 6 B, when the menu key 105 is depressed in a waiting status (step S 302 in FIG. 3 ), the microprocessor 204 makes a predetermined list of functions displayed in the display 101 (step S 501 ). For example, as shown in FIG. 6 A, functions such as “Sound level of incoming call”, “Mail setting”, etc. are displayed, with the highlight bar 401 at the top initial position.

[0045] When any one of the arrow keys 103 is depressed (YES at step S 502 ), the highlight bar 401 moves in the direction of the depressed arrow key 103 (step S 503 ). For example, when the arrow key 103 of the down direction is depressed two times, the highlight bar 401 moves to “Vibrator”, two names below “Sound level of incoming call”. When the highlight bar 401 moves within the current display area of the display 101 (NO at step S 504 ), only the highlight bar 401 moves according to the depressing of the arrow keys 103 (steps S 502 to S 504 ).

[0046] When the highlight bar 401 moves to the outside of the current display area of the display 101 (YES at step S 504 ), the microprocessor 204 scrolls the display screen of the display 101 so as to display hidden function items by the arrow keys 103 (step S 505 ). In this way, the highlight bar moves to the function item which is at a location determined by direction and number of depressing of the arrow key 103 . For example, when the arrow key 103 of the down direction is depressed by six times, the displayed items are scrolled and the highlight bar 401 moves from “Sound level of incoming call” to “Initial setting”, a sixth name below, as shown in FIG. 6B .

[0047] After moving the highlight bar 401 to a desired function item by operating the arrow keys 103 , a user depresses the Enter key 104 surrounded by the arrow keys 103 (YES at step S 502 ). Then, the microprocessor 204 executes the selected function (step S 506 ).

[0048] Referring to FIG. 7 , there is shown a second embodiment of the present invention. In the present embodiment, a keypad 102 also has a first part and a second part. However, the structure of the first part is different from that of the first embodiment with all the other structural elements being the same as those of the first embodiment and thus their detailed explanation will be omitted with denoted by the same reference numerals.

[0049] In the first part of the keypad 102 , a stick lever 601 is provided instead of the arrow keys 103 . The stick lever 601 Is a switch having contacts in four directions of up, down, left and right directions as described in detail later. By inclining the stick lever 601 to a desired direction, the highlight bar 401 can be moved on the display screen In the manner as described above. Further, if the stick lever 601 is structured as a push-button surrounded by the four-direction contact switch, a depression of the stick lever 601 can have the same function as the depression of the Enter key 104 for executing a selected name, with improved operation of the keypad.

[0050] The shape of the stick lever 601 may be determined by considering easy of use. If the stick lever 601 is button-shaped as shown in FIG. 7, a user can perform the selection and entering operation by just placing a thumb, for example, on the upper surface of the stick lever 661 . The stick lever 601 is inclined to a desired direction to move the highlight bar 401 , and, when reaching a desired name of a person to communicate with or a desired menu item, the stick lever 601 is depressed with the thumb to execute the desired operation.

[0051] Referring to FIG. 8A, a substrate 602 has a plurality of contacts 603 formed thereon and covered with a metal dome 604 . None of the contacts 603 normally makes contact with the metal dome 604 . An actuator 605 is placed on the top of the metal dome 604 within a housing 606 and is coupled with the stick lever 601 through an opening 607 formed in the top of the housing 606 .

[0052] As shown in FIG. 8 B, five contacts 701 - 705 are arranged on the substrate 602 . The center contact 701 is surrounded by other contacts 702 - 705 , which are spaced uniformly. In this case, the respective contacts 702 , 703 , 704 and 705 correspond to up, down, left and right directions. The center contact 701 is provided for Enter operation.

[0053] When the stick lever 601 is inclined in the up direction, the corresponding edge of the actuator 605 presses down the metal dome 604 to put the metal dome 604 into contact with only the contact 702 . This causes the highlight bar 401 to move in the up direction. It is the same with other contacts 703 - 705 . When reaching a desired name of a person to communicate with or a desired menu item, the stick lever 601 is depressed with the thumb. This causes the metal dome 604 to be pressed down at the center thereof to put it Into contact with the center contact 701 and thereby the desired operation is executed.

[0054] In this manner, it is possible to achieve equivalent functions of the arrow keys 103 and the Enter key 104 with only one stick lever 601 . Therefore, such a control switch like a joystick contributes to improved operability and reduced size of the telephone.

[0055] As described above, according to the present invention, since the arrow keys and the Enter key are disposed close to each other almost in one integration, it becomes possible to select and input necessary display information with minimum move of a finger. Therefore, selection of a desired one from a plurality of display information items can be facilitated extremely without involving a trouble of finding keys. Similarly, selection of a desired one from various displayed functions can be facilitated. The information entering is perfomred with a mere depressing of the Enter key disposed closely. Thus, according to the present invention, it becomes possible to improve substantially the operability of a portable communication apparatus.

[0056] Furthermore, according to the present invention, since it is also possible to achieve equivalent functions of the arrow keys and the Enter key with only one stick lever, the stick lever can contribute to further improve the operability and reduce the size of a portable communication apparatus.