Abstract:
The invention aims to provide a multifunction personal computer/mobile phone capable of being used both as a mobile phone and as a mobile personal computer, to improve input operability when used as a mobile phone as well as a personal computer, and to retain a compact form when it is not used. 
     A multifunction personal computer/mobile phone is so configured that a left keyboard, a display and a right keyboard are mounted on a hinge so that they are folded and unfolded freely, wherein on the left and right keyboards, key indications for digits, characters, symbols or the like for personal computer use are arranged, and on either of the keyboards, key indications for digits, characters, symbols or the like for mobile phone use are arranged so that the hinge is at the far end from a user, wherein the display is formed rotatably with respect to the keyboard, and the left and right keyboards are spread to a position where the surfaces of the keyboards are horizontal.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a mobile phone capable of incorporating features of a personal computer. 
     2. Description of the Related Arts 
     A mobile phone that is not just a portable, compact and light telephone, but also functions as an information transmitter/receiver as well as a processor and a memory is now widely used. At the same time, a personal computer has a number of features such as a word-processor, a memory or the like as discussed above, and its downsizing or slimming down is under way. Since a mobile phone and a personal computer are comprised of similar electronic and electric means, it is contemplated to share the similar components mentioned above by connecting both by means of cables or the like or directly fitting them. 
     Since a mobile phone is required to be small and light, keys to be operated by fingers that constitute an input unit are inevitably tiny. Alternatively, although some mobile phones have a touch panel type of an input unit instead of the keys, the touch panel is also extremely small. Thus, operation of keys is very difficult. In particular, e-mail transmission from a mobile phone is more difficult, more time-consuming and more prone to typing errors than that from a personal computer. 
     On the other hand, in e-mail transmission from a mobile phone by utilizing a personal computer connected thereto, a user operates the keys of the personal computer, which offers better operability and is less prone to typing errors. This is a simple combination of a personal computer and a mobile phone, and requires a connection kit for linking a personal computer with a mobile phone. In addition, as any similar parts of each remain unshared, this combination offers poor portability. 
     (Reference: Japanese Patent Laid-open Application Nos. 2001-313705 and 2001-339499) 
     SUMMARY OF THE INVENTION 
     The invention provides a multifunction personal computer/mobile phone that shares features of a mobile phone and those of a personal computer, and has achieved a combination of a downsized/slimmed down mobile phone and an operable personal computer. When the mobile phone of the invention is used as a telephone, dial keys of digits, characters, symbols or the like are operated as ordinary keys, while when operations of keys for more characters and symbols, etc. are required like in e-mail transmission, as with, the keys of the invention that have same key arrangement as a personal computer keyboard are operated. Further, a relatively large display as a portable device and better operability are offered. Since the mobile phone of the invention is configured by integrating the features of a personal computer and a keyboard thereof into the mobile phone, while still retaining the features of a mobile phone, as described above, the invention implements the multifunction mobile phone having features of both a mobile phone and a personal computer. 
     The invention aims not only to improve input operability of a mobile phone when key-intensive operations are involved, but also to provide a multifunction personal computer/mobile phone that also utilize features of a personal computer. 
     More specifically, the invention aims to provide a mobile phone that is also used as a personal computer. When it is used as a telephone, use as an ordinary compact mobile phone is possible, while when it is used as a personal computer, it offers a keyboard each key of which has a sufficient size and thus provides a sufficient space for user&#39;s fingers although it is still portable. 
     The invention aims to meet the objectives mentioned above wherein when a mobile phone is used as a telephone, dial keys similar to conventional ones are used as operating keys, while when it is used for e-mail transmission or as a personal computer, keys for a personal computer are used as operating keys. In addition, the invention comprises a multifunction personal computer/mobile phone that has integrated features of a personal computer and is provided with a display that is used both for a mobile phone and a personal computer. 
     To be specific, the invention comprises a multifunction personal computer/mobile phone, wherein a keyboard on the left side, a display and a keyboard on the right side are mounted onto a hinge and so that they are freely folded and unfolded, wherein on keys of the left and right keyboards, digits, characters, symbols or the like for the personal computer are indicated, and on keys of either one of the keyboards, digits, characters, symbols or the like for a mobile phone are indicted so that the hinge will be in the far end position from a user, wherein the display is rotatably formed with respect to the keyboards, and the left and right keyboards are unfolded to a position where the surfaces of the keys of both keyboards are horizontal. 
     In addition, the multifunction personal computer/mobile phone is characterized by the display that is rotatably formed around the hinge. 
     Or, the multifunction personal computer/mobile phone is characterized by the display that is rotatably configured around a side end of the hinge of either of the right/left keyboard. 
     Or, the multifunction personal computer/mobile phone is characterized by the indications of the keys for digits, characters, symbols or the like for a mobile phone are larger than those for a personal computer. 
     A multifunction personal computer/mobile phone of the invention shares features of a mobile phone and a personal computer, is divided into three parts, and is folded threefold. When used as a telephone, it is manipulated similarly to an ordinary mobile phone because the arrangement of digits, characters, symbols, etc. on dial keys is similar to that of an ordinary mobile phone. In addition, when used for e-mail transmission which requires key-intensive operations, or when is used as a personal computer, the right and left keyboards that are folded on the front and back faces of the display sandwiched therebetween are unfolded and spread to 180°. This secures adequate space for the arrangement of the digits, characters, symbols, etc. on the keyboards and provides large keys, thus offering better operability of the keys. In addition, the display is rotatable to 90° with respect to the keyboards, so as to be positioned in the center and in face of a user. 
     To send or receive e-mail messages or the like using the mobile phone, a user no longer needs to press repeatedly a same key to select a character or a symbol, but obtains instead a particular character or a symbol by manipulating the keys on the keyboard for the personal computer. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In the following, embodiments of the multifunction personal computer/mobile phone according to the invention are described with reference to the drawings. 
     Embodiment 1  
       FIGS. 1 to 3  show an embodiment of a multifunction personal computer/mobile phone of the invention. A multifunction personal computer/mobile phone  1  has a structure in which it is divided into three parts that are folded around the axis.  FIG. 1  is a perspective view of mobile phone in a folded position. 
     A display  2  is located at the center when folded, and a left keyboard  3  and a right keyboard  4  are positioned so as to cover the front and back faces of the display, respectively. The display  2  and left and right keyboards  3 ,  4  are pivotably connected to a hinge  5  that serves as an axis.  FIG. 2  is a perspective view in which the left and right keyboards  3 ,  4  are unfolded. At the base edge of the display  2 , a ball-shaped protrusion  6  is formed. The ball-shaped protrusion  6  is fit in the center of the hinge  5  so that it freely rotates to 90°. The display  2  is thus rotatable, and as illustrated in  FIG. 2 , it rotates from the position depicted in broken line to the position depicted in solid line. This makes the screen of the display  2  positioned in the center of the keyboards  3 ,  4  spread to the left and right and the display is thus in face of a user. The display rotates both clockwise and anti-clockwise. 
     The display  2  comprises the pivotable ball-shaped protrusion  6  so that it tilts back and forth to the surfaces of the left and right keyboards  3 ,  4  within the range of approximately 180°. In addition, the display  2  is formed so that at the tilt position, after it is rotated 90° and is in face of a user, it firmly stops at an appropriate position within the range of 180°. It is also possible to comprise the stopper function that stops the display at a predetermined position, for example, at around 130° that is considered optimum inclination when the display is viewed. 
     When folded, the left keyboard  3  is positioned to contact the display  2 . However, when the device is used as either a mobile phone or a personal computer, the keyboard is pivoted on the hinge  5 . On the surface of the left keyboard  3 , keys  7  representing the indications of digits, characters, symbols or the like are arranged in the similar manner to the arrangement and structure of a JIS standard keyboard for a personal computer. The left keyboard  3  comprises the keys  7  to be typed by the left hand fingers. 
     Similarly, the right keyboard  4  is placed adjacent to the display  2  when folded. When the mobile phone is used as a personal computer, the keyboard is pivoted on the hinge  5 . On the surface of the keys of right keyboard  4 , indications of digits, characters, symbols or the like according to a JIS standard personal computer are provided, and the keys  7  have the similar arrangement and structure to those of conventional ones. The right keyboard  4  comprises the keys  7  to be typed by the right hand fingers. 
       FIG. 3  is a perspective view showing the device when it is used as a mobile phone. As shown in  FIG. 3 , only the left keyboard  3  is unfolded to the display  2  that is pivoted to an appropriate angle. While the right keyboard  4  remains folded adjacent to the display  2 , the display is positioned in a predetermined angle to the keyboard  3 . When pivoting, the display either freely stops at an appropriate position, as shown above, or is designed to stop at predetermined angles, for example, approximately at 130° or 170°. 
     The keys  7  on the left keyboard  3  not only constitute the keys  7  for a personal computer, as described above, but also functions as keys  8  for a mobile phone using other indications on the same surface of the keys. The key indications “1” and “the Japanese syllabary character            ” for the telephone use are assigned to the key “T” for PERSONAL COMPUTER, and the key indications “4” and “the Japanese syllabary character          ” are assigned to the key “R”. Similarly and principally, the key indications “7” and “the Japanese syllabary character          ” are assigned to the key “E”, the symbol “*” is assigned to the key “W”, the key indications “2” and “the Japanese syllabary character          ” are assigned to the key “G”, the key indications “5” and “the Japanese syllabary character          ” are assigned to the key “F”, the key indications “8” and “the Japanese syllabary character          ” are assigned to the key “D”, the key indications “0” and “the Japanese syllabary characters           and          ” are assigned to the key “S”, the key indications “3” and “the Japanese syllabary character          ” are assigned to the key “B”, the key indications “6” and “the Japanese syllabary character          ” are assigned to the key “V”, the key indications “9” and “3” are assigned to the key “C”, and “#” is assigned to the key “X”. In addition, as indications of the keys  7  are for personal computer use, they are marked so that they can be read from longitudinal direction when the left and right keyboards  3 ,  4  are spread horizontally. On the other hand, indications of the keys  8  are marked so that they can be read from the end side position opposite to the hinge  5 . The indications of the keys  7  and the indications of the keys  8  are thus placed at a right angle. In addition, as for the sizes of the indications, considering that the mobile phone is used more frequently as a telephone, large characters and symbols are indicated on the keys  8 , thus offering user&#39;s convenience. Furthermore, when the keys  8  are viewed from the longitudinal direction, they do not hinder keystrokes because the indications of digits, characters, symbols or the like are so printed or indented as to be dim or invisible for a user at the longitudinal direction.
       FIG. 4  shows a distance between each key of the keys  7  and the keys  8  according to the invention. The pitch between keys of an ordinary mobile phone is approximately 1.3 mm in length and approximately 7.5 mm in width, while the pitch of an ordinary personal computer is approximately 19 mm both in length and width. Considering the fact that a distance between fingers of an average adult ranges from about 14 to 21 mm, the size of the mobile phone  1  of the invention is made about 100 to 110 mm×56 to 58 mm when it is folded, which provides a pitch of about 15 mm as a distance of the keys  7  in length when the device is used as a personal computer. Similarly, the distance in width is about 10.5 mm. This reduces typing errors on adjacent keys. 
       FIG. 2 , as described above, is a perspective view wherein the multifunction personal computer/mobile phone is used as a personal computer. As shown in  FIG. 2 , the left and right keyboards  3 ,  4  are spread to 180°, so that both are flat. The display  2  is pivoted 90° on the ball-shaped protrusion  6 . In  FIG. 2 , the display  2  rotates from the position depicted in broken line to the position depicted in solid line. After rotation, it is then tilted to an angle which facilitates a good screen view. In this position, the display  2  is placed in the center of the left and right keyboards  3 ,  4 , facing to a user, and the left and right keyboards  3 ,  4  are placed in proximal to a user. As described above, since each pitch between the keys  8  in length and width is adequately secured, the operation is less prone to errors in typing the adjacent keys  8 , thus making the device user-friendly as a personal computer. 
     Embodiment 2 
       FIG. 5  is a perspective view of another embodiment of a multifunction personal computer/mobile phone. Similar to the embodiment 1 described above, the multifunction personal computer/mobile phone  9  comprises a display  10 , a left keyboard  11  and right keyboard  12  each mounted on a hinge  13 . When used as a personal computer, by pivoting and spreading the three parts, the display  10  is positioned in the center, and the left keyboard  11  and right keyboard  12  are positioned in the left and right, respectively. When used as a personal computer, the display  10  rotates 90° around an axis  14  which is located at the bottom edge of the display  10 . The axis  14  is formed in a ball-shaped protrusion similar to embodiment 1, or a cylindrical projection. 
     In addition, positioning the other end of the axis  14  at the edge of the hinge  13  allows the rotated display  10  to stand at the back end of the left and right keyboards  11 ,  12 , when used as a personal computer. 
     Although the display  10  is used in a position just by rotation, it is also moved horizontally by moving along a slot  15  formed in the bottom edge of the display  10 . The arrangement of the indications of digits, characters, symbols or the like of the left and right keyboards  11 ,  12  or other various functions as a personal computer or a mobile phone are same as those of the embodiment 1. 
     Embodiment 3  
       FIG. 6  is a perspective view of a part of other embodiment of a multifunction personal computer/mobile phone. A multifunction personal computer/mobile phone  16  comprises a display  17  in the center, a left keyboard  18  and a right keyboard  19  which are folded on the front and back faces of the display sandwiched therebetween, and the keyboards  18 ,  19  are pivotably connected to a hinge  20 . 
     The display  17  is rotatable around an axis  21  located either on the hinge  20  or at the edge proximal to the hinge  20  of either the left or the right keyboard  18 ,  19 . One end of the axis  21  is movably fit into a sliding slot  22  at the bottom end of the display  17 . 
     This configuration makes the display  17  pivotable like the left and right keyboards  18 ,  19 , and rotatable 90° to face the keyboard  18 , thus allowing the device to be used as a mobile phone. When used as a mobile phone, the right keyboard  19  is folded on the backside of the display  17 . 
     In addition, when used as a personal computer, the display  17  slides along the slot  22  to the center position of the left and right keyboards  18 ,  19 . 
     In order to fold the display  17  onto the left keyboard  18  and further the right keyboard  19  onto the display  17 , at the bottom end of the display  17 , a space corresponding to rising height of a rising gripper  23  fixed to the hinge  20  of the right keyboard  19  is provided, wherein the device is so structured that abutment of the display  17  and the gripper  23  does not prevent the display and the keyboards from being folded, and that the three parts are easily folded. 
     The arrangement of the indications of digits, characters, symbols or the like of the left and right keyboards  18 ,  19  and other various functions as a personal computer and a mobile phone are same as those of embodiments 1 and 2. In addition, when used as a mobile phone, the conditions are similar to those of  FIG. 3 , while the conditions when used as a personal computer are similar to those of  FIG. 5 . 
     In this embodiment, it is needless to say that the left and right keyboards and the display, etc. are mechanically connected as well as electrically. 
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of a multifunction personal computer/mobile phone according to the invention when it is folded. 
       FIG. 2  is a perspective view of a multifunction personal computer/mobile phone according to the invention when it is unfolded and used as a personal computer. 
       FIG. 3  is a perspective view of the multifunction personal computer/mobile phone according to the invention when it is used as a mobile phone with its one keyboard unfolded. 
       FIG. 4  is a partially enlarged plan view showing an arrangement and a size of indications of digits, characters, symbols or the like. 
       FIG. 5  is a perspective view of another embodiment of a multifunction personal computer/mobile phone according to the invention when used as a personal computer. 
       FIG. 6  is a perspective view showing an axis of another embodiment of a multifunction personal computer/mobile phone according to the invention.