Patent Publication Number: US-2005130720-A1

Title: Multifunction mobile communications device with slidable display screen

Description:
BACKGROUND OF THE INVENTION  
      Mobile telephones and similar communication devices are rapidly expanding in use and function. Such devices will soon accommodate such diverse services as, Internet access, personal information management, facsimile, imaging messaging, and video conferencing, in addition to telephone communication. To accomplish this there is a need to provide keypads, function buttons, and displays that are compatible with the more complex applications to which the mobile device will be adapted. Full function text keyboards, such as the standard QWERTY typing array of keys and buttons, are difficult to provide while maintaining the compact size required in the mobile device. An equally difficult problem is presented by the need for display screens that can display the vast amount of different information that will be accessible by these devices. Such devices on the market today are cumbersome and often require several devices to obtain the full array of functions, i.e. personal digital assistant and a mobile telephone.  
      It is a purpose of this invention to provide a simple and inexpensive full function mobile communications device which can access many services through the use of a single device. It is another purpose of this invention to combine the personal digital assistant with a mobile telephone in a practical package of minimum dimensions. It is also a purpose of this invention to provide a configuration of keypads, button decks, and displays which provide a simple, easy to use, user interface. It is another purpose of this invention to allow the device to be operated with one hand.  
     SUMMARY OF THE INVENTION  
      A mobile communication device is designed to provide the combined functions of a personal digital assistant (PDA) and a mobile telephone. The device is constructed having a body which is defined by bottom, top, and side walls to form an enclosure which houses the internal components of the device and associated accessories. The top of the body has a recessed central portion in which a display screen panel is mounted for sliding and pivotal motion. The screen slides transverse to the longitudinal axis of the body, within the recess, between a first position in which it generally conforms to the overall contour of the body and a second position in which the screen extends externally to the body contour. In the extended position, a text keyboard, mounted on the recessed deck which forms the floor of the recessed central portion is exposed for use. On each side of the recessed central portion button decks are constructed on which can be mounted buttons or keypads suitable for the basic functioning of the communication device and its associated accessories. A digital camera is also mounted on one of the side decks on a movable bracket to accommodate video telephoning or other digital camera applications.  
      The display screen is viewable in either the first or second positions and may be tilted up to make viewing more convenient in the extended position. One of the side decks of the body is constructed with a telephone keypad for use with the mobile telephone function. The display may be oriented on the screen between at least two positions for reading in a longitudinal direction or a transverse direction depending on the function being used. When the text keyboard is in use the display will read longitudinally. Other functional keys are distributed on the screen panel and side decks for convenient access by the user. The mobile telephone function is designed for one hand operation. 
    
    
     DESCRIPTION OF THE DRAWING  
      The invention is described in more detail below with reference to the attached drawing in which:  
       FIG. 1  is a top view of the communications device with the screen oriented for mobile telephone operation;  
       FIG. 2   a  is a bottom view of the communications device in the closed position;  
       FIG. 2   b  is a sectional view taken along the section lines A-A in  FIG. 1 ;  
       FIG. 3  is a perspective view of the communication device in which the display screen panel extended;  
       FIG. 4  is a top view of the communication device with the display screen extended;  
       FIG. 5   a  is a perspective view of the communication device in which the display screen panel extended and tilted;  
       FIG. 5   b  is a perspective cutaway view showing one side of a mounting arrangement for the screen panel;  
       FIG. 6  is a perspective view of the communications device with the screen panel fully pivoted to the closed position;  
       FIG. 7  is a perspective view of the communications device showing an alternative embodiment of the screen panel attachment; and  
       FIG. 8  is a block diagram of the system of the communication device. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT  
      An electronic device  30  is constructed having a configuration of screens, text keyboard, and function keys which allow the device to provide multiple functions. The configuration is optimized for utilization of internet services through a mobile telephone to provide internet access for shopping, news, email, finance, travel and other available services. In addition personal information data processing may be provided, such as calendar, appointments, notes, contacts, and other applications provided by packaged software such as MICROSOFT OFFICE. The result is the effective combination of the functions of a personal digital assistant and a mobile telephone.  
      The subject mobile communication device is constructed having a body  1  which is defined by bottom, top, and side walls to form an enclosure which houses the internal components of the device and associated accessories shown generally in  FIG. 5 . The top of the body  1  has a recessed central portion  3  in which a display screen panel  2  is mounted for sliding and pivotal motion. The bottom surface of the recess provides a recessed deck on which is mounted a text keyboard  12 , such as the QWERTY keyboard shown in  FIG. 3 .  
      The screen panel  2  slides over the keyboard  12  in a direction substantially transverse to the longitudinal axis  14  of the body  1 . The screen panel  2  may be mounted on pins  31 , as shown in  FIG. 5   b , in transverse slots  32  constructed on the sides  33  of the recess  3 . Appropriate electrical connections  34  are made through the mounting pins  31  at either end of the panels travel. The screen panel  2  may be manually moved between a first position, as shown in  FIG. 1 , in which it generally conforms to the overall contour of the body  1  and a second position, as shown in  FIG. 3 , in which the screen panel  2  extends externally to the contour of body  1 . A releasable locking mechanism  35 , such as a spring detent  36  and groove  37  is constructed at either end of each slot to engage the mounting pins  31  and maintain the screen panel  2  in the desired position. Once extended, the screen panel  2  may be tilted upwards from the flat position to an angle, for example of 150°, to make viewing of the display  6  of screen  2  easier when using the device on a desk or other flat surface. As shown in  FIG. 6 , the screen panel  2  may be adapted to pivot approximately 180° to provide a cover for the device with screen  2  facing recess  3  in a protected position. As shown in  FIG. 2 , a window  15  is provided through the bottom  16  of body  1  to allow, at least caller identification, or other display content to be viewed , in the covered position.  
      In the alternate embodiment, shown in  FIG. 4 , the screen panel  2  is mounted on pivot pins  31  for rotation about the axis of the pins  38 . An intermediate sledge element  17  supports the pins  31  for rotation. The sledge element  17  in turn is mounted to the side walls of the recess for sliding motion in a track  18 . This configuration may provide a more durable electrical and mechanical connection. The sledge elements  17  could also be mounted to slide in grooves or rails formed in the top surface of the body  1 . In the latter embodiment no recess need be formed or only a slight recess to provide clearance over the keyboard  12 .  
      The panel  2  is operable in either position and the display is oriented for the most advantageous view for a particular function. The display may be graphically rotated through 90° on screen panel  2  for reading in a transverse direction or a longitudinal direction, as shown in  FIGS. 1 and 3  respectively. The display orientation on screen  2  is accomplished either manually, by a switch, or automatically by instructions from the control microprocessor of the device. In the later instance, the desired orientation could be determined by the operation of software associated with a particular function or by a sensor  39  which indicates the screen panel position. The sliding operation of the screen panel  2  is arranged to trigger the display  6  to rotate to the longitudinal orientation.  
      In the extended position, the text keyboard  12 , mounted on the recessed deck of the body  1 , is exposed for use. Each side of the recessed portion of the top of the body is constructed with button decks  4  and  5  on which can be mounted buttons or keypads suitable for the basic function of the communication device and its associated accessories. A digital camera is mounted on one of the side decks on a movable bracket to accommodate video telephoning or other digital camera applications. In the alternate embodiment in which no recess is formed, a single flat deck may be formed on the top surface of the body  2 . This surface may be divided into side button decks and a central text keyboard deck.  
      The display screen is viewable in either the first or second positions and may be tilted up, as shown in  FIG. 5 , to make viewing more convenient in the extended position. One of the side decks of the body is constructed with a telephone keypad  7  for use with the mobile telephone function. With the display  6  oriented in the transverse condition, the device may be operated as a standard mobile phone. The display  6  may be oriented on the screen between at least two positions for reading in a longitudinal direction or a transverse direction depending on the function being used.  
      Other functional keys are distributed on the screen panel, such as hard keys  21  which correspond to screen identified functions. The side decks  4  and  5  also provide a practical surface on which to mount frequently used function keys, such as cursor keys  13 , send and end keys  9 , application key  8 , and on/off and display orientation or camera buttons  23  and  24  for convenient access by the user.  
      The mobile telephone function is designed for one hand operation. To facilitate this function the telephone number pad  7  may be arranged in a circle to provide more convenient access in both of the longitudinal or transverse positions of use. As shown in  FIG. 5   a , a similar convenience could be provided by arranging the telephone keypad skewed at a 45° angle to the longitudinal axis  14  to enable convenient use in both positions of use. For the purpose of this application, the positions of use are associated with the display orientation, i.e., the transverse position as shown in  FIG. 1 , and the longitudinal position, as shown in  FIGS. 2-5 .  
      The microphone  20  and earpiece  19  of mobile telephone  21  are positioned at the bottom surface  22  of body  1 , as shown in  FIG. 2 . Earpiece  19  and microphone  20  are connected to a mobile phone transceiver contained within body  1 , as is well known. The system of the multifunction device  30  is shown in general in the block diagram of  FIG. 5 . Main control processor  25  contains application software to provide the functions of the personal digital assistant and control the operation of the components. A selection of menus are available to allow the user to select and operate the applications provided, such as the video camera  11 , calendar data  26 , contact data  27 , and Internet browser  28 . The functions are all controlled by hard keys which have a common function in all the applications and soft keys which may have different functions depending on the application software. Screen orientation is set according to the most convenient view in each application. Control Processor  25  can instruct the display driver  29  of display  6  to rotate the display according to the software application in use. Screen orientation can also be triggered by extending the display panel. A manual override is provided by actuation of switch  23  for special uses.  
      For further convenience a speaker  40  is provided on side deck  4  to allow hands free operation when the text keyboard is exposed for use. This enables the user to continue to work or take notes while having a telephone conversation.  
      In this manner a wide variety of applications can be accommodated in a very compact package with a user interface that allows convenient use of keyboard, keypads and screen. It should be noted that the applications shown in the block diagram of  FIG. 8  are for illustration only and could include many others, such as facsimile, games, email, messaging to name a few.