Portable electronic apparatus

Abstract

In a portable electronic apparatus, a second keyboard to be manipulated with a right hand is joined to a first keyboard unit including a first keyboard to be manipulated with a left hand so that the second keyboard can be turned down. A display unit having a built-in liquid crystal display is joined to the first keyboard unit so that the display unit can be tuned down. When the display unit is turned down, the display unit engages with the second keyboard unit that is turned down. When all the parts of the electronic apparatus are closed, the electronic apparatus serves as a CD player of a CD jacket size. When the display unit is opened, the electronic apparatus has not only the capability of a DVD player but also the capability of a simple personal computer. When all the parts are left open, the electronic apparatus serves as a personal computer having a full keyboard.

1 . A portable electronic apparatus comprising:
 a first keyboard unit including a first keyboard;   a second keyboard unit including a second keyboard;   a first hinge being interposed between the first and second keyboard units and allowing the second keyboard unit to engage with the first keyboard unit with the first and second keyboards opposed to each other;   a display unit having a built-in display;   a second hinge allowing the display unit to engage with the back of the second keyboard unit with the second keyboard unit turned down to engage with the first keyboard unit; and   an operating unit arranged on the back of the second keyboard unit and capable of being manipulated with the second keyboard unit engaged with the first keyboard unit, wherein the operating unit comprises a first operating unit including function keys except for a character and a number input function designed for particular functions.   
     
     
         2 . The electronic apparatus according to  claim 1 , further comprising a disk drive, and a control unit that controls the operation of the disk drive according to an operational instruction, which is entered at the operating unit, with the display unit opened to disengage from the second keyboard unit. 
     
     
         3 . The electronic apparatus according to  claim 1 , further comprising a computing feature, and a control unit that controls the operation of the computing feature according to an operational instruction, which is entered at the operating unit, with the display unit opened to disengage from the second keyboard unit,
 wherein the operating unit further comprises a second operating unit including keys designed for the operational instructions.   
     
     
         4 . The electronic apparatus according to  claim 1 , wherein:
 when the display unit is opened to disengage from the second keyboard unit, if the first keyboard and the second keyboard that is turned down are held in the operator's hands, the first operating unit is located at a position on the back of the second keyboard unit at which the first operating unit can be manipulated with one hand, and the second operating unit is located at a position on the back thereof at which the second operating unit can be manipulated with the other hand.   
     
     
         5 . The electronic apparatus according to  claim 1 , wherein the display unit joined to the first keyboard unit via the second hinge has an inclined surface that, when the display unit is opened with the first keyboard unit placed on a plane, locks the display unit so that the display unit will meet the first keyboard unit at a predetermined angle. 
     
     
         6 . The electronic apparatus according to  claim 1 , wherein the first keyboard is a keyboard to be manipulated with one hand, and the second keyboard is a keyboard to be manipulated with the other hand. 
     
     
         7 . The electronic apparatus according to  claim 1 , wherein the display unit has the same contour as the side of the second keyboard unit on which the operating unit is formed. 
     
     
         8 . The electronic apparatus according to  claim 1 , further comprising a control unit that, when the power supply of the electronic apparatus is turned on and if the display unit is opened, activates the operating unit. 
     
     
         9 . The electronic apparatus according to  claim 1 , further comprising an invalidating circuit that, when the second keyboard unit is opened, invalidates an operational instruction entered at the operating unit. 
     
     
         10 . The electronic apparatus according to  claim 1 , further comprising a control unit that, when the second keyboard unit is opened, activates the first and second keyboards. 
     
     
         11 . A portable electronic apparatus including a first keyboard unit that includes a first keyboard, a second keyboard unit that is joined to the first keyboard unit via a first hinge so that the second keyboard unit can be engaged with the first keyboard unit, and a display unit that is joined to the first keyboard unit via a second hinge and that has a built-in display, comprising:
 a remote controller connection terminal; and   a first control unit that, when the power supply of the electronic apparatus is turned on and if the display unit is closed, instructs the electronic apparatus to reproduce data from a disk according to an operational instruction entered at a remote controller connected via the connection terminal.   
     
     
         12 . The electronic apparatus according to  claim 11 , further comprising:
 an operating unit formed on the back of the second keyboard unit; and   a second control unit that, when the power supply of the electronic apparatus is turned on and if the display unit is opened, activates the operating unit.   
     
     
         13 . The electronic apparatus according to  claim 11 , wherein the remote controller has the same features as at least part of the features of the operating unit. 
     
     
         14 . The electronic apparatus according to  claim 11 , further comprising a memory unit in which a plurality of operating systems is stored. 
     
     
         15 . The electronic apparatus according to  claim 14 , wherein:
 the plurality of operating systems includes a first operating system and a second operating system that provides the electronic apparatus with a larger number of features than the first operating system does; and   software that controls reproduction of data from a disk and that runs on the first operating system is stored in the memory unit.