Abstract:
An electronic input device (MS) has a flexible keyboard ( 14 ) for receiving user input and a housing ( 10 ) defining a space for accommodating the keyboard. The input device has a compacted state and an extended state. The keyboard adopts a compacted spatial configuration in the compacted state and adopts an extended spatial configuration in the second state. In the compacted state the keyboard is wound on a roll. The input device additionally has a retractable, flexible display having corresponding compacted and extended states so that both the keyboard and the display can be rolled in and out together.

Description:
FIELD OF THE INVENTION  
         [0001]    The invention relates to user interfaces, and relates especially to minimising the size of user interfaces.  
         BACKGROUND OF THE INVENTION  
         [0002]    During the last two decades different types of small electronic input devices have been developed, especially for mobile telecommunication. These devices generally have a keypad comprising either a set of buttons typically used on a telephone handset or a small keyboard in the QWERTY format.  
           [0003]    It is common in such electronic input devices to provide a display to let a user see information which has been entered via the keypad or keyboard and to provide the user with other information such as received messages, instructions or other information. Developments in electronic and battery technologies have allowed manufacture of ever smaller devices having ever greater functionality. This improvement in functionality has enabled users to interact with electronic input devices in more ways, which has led to more menu options being available. Consequently, electronic input devices generally require a relatively large display and a large number of input keys. It is now common for users to carry their electronic input devices with them most of the time. This increased mobility generally limits the size of electronic input devices to a handheld size. Furthermore, since they are now often carried about, they need to be robust. There is thus a conflict between the need to have a large display and a large keyboard to allow ease of use and the need to have a small portable electronic input device.  
           [0004]    In order to keep the size of electronic input devices small, it is known to provide browsing menus to display only a small number of available options and/or information at any one time and to reduce the size of keyboard keys. However, user interfaces of newer and more complicated devices, such as mobile telephones and Personal Digital Assistants, often have a computer-like functionality, and so require a display which is capable of displaying text (having a number of rows) and graphics. QWERTY format keyboards are often provided. An example of such a device is the Nokia® 9000 Communicator. This is in the form of a two-part mobile station comprising a complete QWERTY format keyboard in one part and a display having 640×200 pixels in the other part. The two parts are joined together by a hinge.  
         SUMMARY OF THE INVENTION  
         [0005]    Now a user interface for an electronic input device has been invented, which input device has an input means extractable from a storage space of the device into an extended state and retractable back into the storage space into a retracted state. Thus, the size of the data input device can conveniently be made smaller for transport whilst the input means is protected in the storage space. The electronic input device can subsequently be put into a larger size when the input means is to be used.  
           [0006]    According to a first aspect of the invention there is provided an electronic input device comprising:  
           [0007]    a flexible input means for receiving user input; and  
           [0008]    a housing defining a space for accommodating said input means;  
           [0009]    characterised in that  
           [0010]    said input device has a first state and a second state; wherein  
           [0011]    the input means adopts a compacted spatial configuration in the first state and adopts an extended spatial configuration in the second state.  
           [0012]    Preferably, the input means has an input surface having touch sensitive areas.  
           [0013]    Preferably, the compacted state is non-planar. All or part of the input means may adopt the compacted spatial configuration. In this way, a smaller input area, or no input area at all, is provided to the user.  
           [0014]    Preferably, the extended spatial configuration is planar. All or part of the input means may adopt the extended spatial configuration. In this way, the input means provides an input area to a user.  
           [0015]    Advantageously, the size of the electronic input device can be reduced, for example by gathering the input means either partially or entirely into the housing, and increased to reveal a convenient large input means, for example by letting out the input means either partially or entirely from the housing.  
           [0016]    Preferably, in the second configuration the input means is wound into a roll. Alternatively, it may be folded. In one embodiment, it is a concertina arrangement.  
           [0017]    Preferably, said device comprises means for moving said input means between said first and second configurations.  
           [0018]    Preferably, said input means is a keyboard. In an embodiment in which the input means is a keyboard its size can be changed considerably thus allowing construction of a small device with full keyboard functionality. It is an advantage of a full keyboard that the user can quickly and easily type text, and yet the input device can be compacted to a convenient small size to be easy to carry with the user during transportation.  
           [0019]    Preferably, said input means is a display. Preferably, part of the display is arranged to display a key to implement a soft key the function of which can be varied by software. This has an advantage of combining an input and output means so that the same surface can be used both for displaying information to the user and for reading user input, and thus it is not necessary to provide a separate display at all.  
           [0020]    Preferably, the electronic input device comprises:  
           [0021]    a flexible output means for outputting information; and  
           [0022]    a housing defining a space for accommodating said output means;  
           [0023]    characterised in that  
           [0024]    said input device has a first state and a second state; wherein  
           [0025]    the output means adopts a compacted spatial configuration in the first state and adopts an extended spatial configuration in the second state.  
           [0026]    Preferably, said flexible output means is a display.  
           [0027]    Advantageously, the size of the display can be changed to a high extent. This allows construction of a small device with a large enough display to show a large amount of information at any one time, for example a WWW (World Wide Web) page or e-mail.  
           [0028]    Preferably said output means and said input means are arranged so that the input device has two states corresponding to the first and second states of both input means and output means. In the first state both the input means and the output means are compacted and in the second state both the input means and the output means are extended. This provides the advantage of either simultaneous extension or simultaneous compaction of both the input means and the output means.  
           [0029]    Preferably, the electronic input device comprises a hinge for foldingly connecting the housing defining the space for accommodating said flexible output means to the housing defining a space for accommodating said input means. This provides an electronic input device, which has a relatively large display, and a relatively large input means and yet can be packed into a compact configuration. This is particularly useful in reducing the size of an electronic input device that is always carried by a user.  
           [0030]    Preferably, the electronic input device is a telecommunications device. The telecommunications device may have a data terminal mode in its extended spatial configuration and a telephone mode in its compacted spatial configuration.  
           [0031]    Preferably, the electronic input device comprises:  
           [0032]    two elements, which are foldable about a hinge between an open configuration and a closed configuration,  
           [0033]    a speaker located in one element, and  
           [0034]    a microphone in another element.  
           [0035]    The telecommunications device is unfoldable to separate the microphone and the speaker. In this way the speaker may be located conveniently close to a user&#39;s mouth and the microphone may be located conveniently close to the user&#39;s ear. Advantageously the elements can be folded together to reduce thei size of the electronic input device.  
           [0036]    Preferably, the electronic input device further comprises:  
           [0037]    a stop to prevent the device being opened beyond a certain maximum opening angle, and a means for changing the maximum opening angle when the configuration of the device is changed between the compacted spatial configuration and the extended spatial configuration. This provides different maximum opening angles for when the device is to be used in a telephone mode and when it is to be used in a data terminal mode. For example, it is possible to reduce the opening of the device to a convenient viewing angle for the data terminal mode. In the telephone mode, the mobile station can be further opened to increase the distance of the microphone and the speaker from each other.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0038]    The invention will now be described, by way of example only, with reference to the accompanying drawings, in which:  
         [0039]    [0039]FIG. 1 shows a perspective view from the front of a mobile station in a transport mode;  
         [0040]    [0040]FIG. 2 shows a side view of the mobile station of FIG. 1 in a telephone mode;  
         [0041]    [0041]FIG. 3 shows a perspective view from the front of the mobile station of FIG. 1 in a telephone mode;  
         [0042]    [0042]FIG. 4 shows a perspective view from the front of the mobile station of FIG. 1 in a data terminal mode;  
         [0043]    [0043]FIG. 5 shows an example of a support mechanism;  
         [0044]    [0044]FIG. 6 shows a front view of the mobile station of FIG. 1 in a partially extended mode;  
         [0045]    [0045]FIG. 7 shows a cross section of the mobile station of FIG. 6 along line A-A′; and  
         [0046]    [0046]FIG. 8 shows enlarged detail of FIG. 6.  
     
    
     DETAILED DESCRIPTION  
       [0047]    [0047]FIG. 1 shows a mobile station MS in a retracted configuration, which is suitable for transportation and to be carried by a user, for example in a pocket. It can be seen that in this retracted, or folded-up, configuration the mobile station is basically of a cylindrical shape. The mobile station comprises four elements  10 ,  11 ,  12 , and  13 , which have outwardly facing curved surfaces defining the cylindrical shape. The elements are a lower storage element  10 , an upper storage element  11 , a battery element  12  and an electronics housing element  13 . The battery element  12  contains a battery for operating the mobile station. The electronics housing element  13  contains mobile station electronics to enable the mobile station to be used as, among other things, a mobile telephone and as a data terminal.  
         [0048]    Referring now to FIGS. 2 and 3 it can be seen that elements  11  and  10  and elements  13  and  12  are hinged together with hinges  18 . The elements  10  and  12  are adjacent to each other and form a first hinged entity. The elements  11  and  13  are correspondingly adjacent to each other and form a second hinged entity. Both of the hinged entities each move about the hinges as a unit. The mobile station is provided with a latch (not shown) to resist it being accidentally opened. Alternatively, friction means may be provided for this purpose.  
         [0049]    [0049]FIG. 3 shows a perspective view from the front of the mobile station of FIG. 1 in an opened, that is telephone, configuration. The first and second entities have been moved relatively with respect to each other about the hinges  18  and are disposed at an angle of about 115°. This is a comfortable angle for the mobile station to be used as a telephone or as a data terminal as will be described below. The opened configuration reveals a telephone speaker  20  located close to the upper end of the electronics housing element  13  and a microphone  21  located close to the lower end of the battery element  12 . A telephone keypad  22  can be seen on a surface of the battery element  12 , which surface faces a corresponding surface of the lower storage element  10 . In another embodiment of the invention, the user may give verbal input rather than pressing keys with the input being recognised by speech recognition.  
         [0050]    Of course, the angle does not have to be exactly 115° but may be arbitrarily chosen. The angle may be either freely adjustable or it may be adjustable in certain steps. There may only be two possible angles at which the mobile station may be fixed: in a completely closed configuration, where the angle is 0°, and in an open configuration, where the angle is typically within a range of 90 to 270 degrees, preferably less than 180 degrees. Alternatively, there may be a third fixed angle so that there are different angles for telephone use and for data terminal use, as described later in this document.  
         [0051]    [0051]FIG. 4 shows a perspective of the mobile station of FIG. 1 in an extended, data terminal, configuration. Pairs of elements forming each of the first and second hinged entities, that is elements  10  and  12  and elements  11  and  13  are connected to each other by a flexible keyboard  14  and a flexible display  15  respectively. The upper storage element  11  provides a storage space into which the keyboard  14  can be wound and the lower storage element  10  provides a storing space into which the display  15  can be wound. Both the keyboard  14  and the display  15  are arranged to be wound into their respective storage spaces so that the mobile station is in a suitable configuration for transportation or to be used as a telephone. This can be arranged by using any suitable means such as a spring-loaded or an electrically driven roller. In case of electrically driven winding, the battery can be connected to a miniature sized electrical motor in the lower storage element  10  with flexible wires extending beneath the keyboard  14 . The elements  13  and  12  are provided with grips, which a user can grasp to pull the elements in respective pairs  10  and  12  and  11  and  13  away from each other. When these pairs are being separated, the keyboard  14  and the display  15  become removed from their storage spaces and unwound partially or to their full extents. The keyboard  14  and the display  15  are electrically coupled to the electronics within the electronics housing element  13 . The device also comprises a flexible flat cable (not shown) extending across the hinges  18  to couple the battery, the keypad and the keyboard  14  to the electronics in the electronics housing element  13 . Thus the electronics drives the display  15  and receives input from the keyboard  14 .  
         [0052]    Since the keyboard  14  and the display  15  are flexible and can be wound, they do not need to be sharply folded. Alternatively, the keyboard  14  and the display  15  may be stored in their respective storage spaces in a concertina type arrangement having a suitable mechanism to retract them.  
         [0053]    In the extracted configuration, the keyboard  14  and the display  15  are parallel in the direction of their longest side, although they do not necessarily share the same plane.  
         [0054]    In one embodiment of the invention the keyboard  14  is a touch pad arrangement for sensing touch by a finger or by a touch pen  17  which is provided for this purpose. In this embodiment, the pen  17  is located in an end of the lower storage element  10 . It is convenient to locate the pen  17  on, or adjacent to, an axis about which the keyboard  14  is wound. In this way, the pen  17  may be located inside the keyboard  14  when it is wound. The keyboard  14  is made of an EMFi film, as is known to a person skilled in the art. A set of keys  16  is printed on the keyboard  14  to indicate to a user where to press. In another embodiment, the keys of the keyboard are not printed but instead the keyboard is capable of displaying virtual keys  16 , that is soft keys, which are to be pressed. Using soft keys allows dynamic mapping and thus enhances the variability of the keyboard so that it can be adapted to receive input of different kinds in different circumstances. For example, the mobile station can show legends for shortcut keys (such as CTRL A) adjacent to certain keys. These legends may be customised by different applications. In another embodiment, rather than providing a keyboard, a touch pad is provided which can be used as a drawing surface for a drawing application or used as a general input device. For example, it could be used to extend the display area to provide an expanded view to a document or an image.  
         [0055]    The display  15  is a paper-like display element. Manufacturers for such display elements comprise E-Ink Inc. &amp; Massachusetts Institute of Technology and Rank Xerox Corporation. Rank Xerox has described one type of paper-like displays called “gyricon”: “A gyricon sheet is a thin layer of transparent plastic in which millions of small beads, somewhat like toner particles, are randomly dispersed. The beads, each contained in an oil-filled cavity, are free to rotate within those cavities. The beads are ‘bichromal’, with hemispheres of contrasting color (e.g. black and white), and charged so they exhibit an electrical dipole. Under the influence of a voltage applied to the surface of the sheet, the beads rotate to present one colored side or the other to the viewer. A pattern of voltages can be applied to the surface in a bit-wise fashion to create images such as text and pictures. The image will persist until new voltage patterns are applied to create new images. ‘ . . . ’ For applications requiring more rapid and direct electronic update, the gyricon material might be packaged with a simple electrode structure on the surface and used more like a traditional display. Gyricon is described at http://www.parc.xerox.com/dhl/projects/epaper/.  
         [0056]    The first hinged entity is relatively massive compared to the second hinged entity so that the first entity can lie flat upon a surface when the mobile station is opened. This applies even when the second hinged entity is disposed at an angle to the first hinged entity of more than 90°. In this way, the mobile station is self-supporting when in a data terminal mode. Therefore, the mobile station can be placed on a desk and not topple over. This stability can be provided by locating heavy parts of the mobile station, such as the battery, in the battery housing element  12 . Alternatively, it can be provided by locating the majority of the weight in the battery housing element  12  away from the hinges  18  and the majority of the weight in the electronics housing element  13  close to the hinges  18 .  
         [0057]    The mobile station may also comprise a frame located beneath the keyboard  14  and the display  15 . The frame holds the mobile station in the extended configuration. The frame is extendable and retractable. The frame also provides support to the back faces of the keyboard  14  and the display  15  to enable the mobile station to be used on an uneven surface or in the hands of a user. In any case, whether or not a frame is provided, winding of the keyboard  14  and the display  15  can be arranged to occur only in response to user initiation so that the mobile station can be laid on a desk or other such flat surface and stay in the extended configuration.  
         [0058]    [0058]FIG. 5 shows an example of a frame provided to support the keyboard. The frame comprises three sets of folding support bars  52 . Each set has four support bars which pivot about pivots  56  at both ends. The support bars  52  of each set are maintained in a parallel configuration with corresponding support bars  52  in the other sets. The support bars  52  mechanically connect the battery housing element  12  with the lower storage element  10 . The mechanism further comprises three intermediate bars  58 , which connect the three sets together. The intermediate bars  58  force corresponding support bars  52  from each set to stay parallel when the mobile station is extended or retracted. In an embodiment in which the support bars  52  comprise conductive material, they can be used electrically to couple the keyboard and battery housing elements  10  and  12 . Alternatively, one of these sets can support an electrical lead coupling these elements. A similar frame arrangement can be used to support the display  15 .  
         [0059]    [0059]FIG. 6 shows a front view of the mobile station in a partially extended mode. The battery housing element  12  and the electronics housing element  13  are provided with a stop mechanism. The stop mechanism uses a stud  62  provided on the upper storing element  11 .  
         [0060]    [0060]FIG. 7 shows a cross section of the view of the mobile station in FIG. 6 along the line A-A′. This embodiment has three fixed opening angles. On a wall facing towards the upper storage element  11 , the electronics housing element  13  has a recess  74  on its side at its lower end, close to the hinge  18 .. The recess has a form of a sector of approximately 45 degrees. The hinged end of the electronics housing element forms the first straight side or radius of the sector.  
         [0061]    The battery housing element  12  has a wall that faces towards the lower storage element  10 . This wall has an extending flange  72 . The flange is basically an extension of the wall going beyond the end of the battery housing element  12 . The flange has a sector shape in side view. The flange has an arc extending from the lower side of the battery housing element. The arc extends over an angle of about 60 degrees and terminates at a straight side connecting the arc to the upper side of the battery housing element. The narrow apex of the flange is thus towards the hinge. The flange is aligned in proportion to the hinge so that it enters the recess when the mobile station is opened about the hinges. At a certain first opening angle, the flange fills the entire recess and a leading edge  73  meets the end  77  of the recess.  
         [0062]    In order to provide two different opening angles, there is a stop  76 . The stop is an extension of the wall of the electronics housing element  13 , which faces towards the upper storage element. The stop follows the plane of this wall and extends a few millimetres over the recess  74 . The stop and the flange are both aligned to the level of the outer surfaces of the electronics housing element  13  and battery housing element  12 . In other words, the stop  76  and the flange  72  occupy a common plane. The flange has two configurations, a relaxed and a bent configuration. In the bent configuration, the flange is slightly bent sideways. The recess is dimensioned deeply enough so that there is space behind the stop for the flange to slide, when the flange is in the bent configuration.  
         [0063]    There are three abutment surfaces. The flange  72  has the first abutment surface  73  that is its leading edge. This surface prevents further opening of the mobile station beyond a certain opening angle. The recess  74  has an inner wall (the second direct wall of the sector) defining the second abutment surface  77 , which defines the first opening angle. This first opening angle defines the maximum opening angle when the mobile station is being used as a telephone. The stop  76  provides a third abutment surface which faces roughly towards the hinged end of the electronics housing element. When the mobile station is being used as a data terminal that is in the extracted configuration, the stud  62  is far from the flange, the flange moves along the plane of the side walls of the battery and electronics housing elements, and at a certain point engages with the stop.  
         [0064]    The operation of the stop mechanism will now be described referring to FIGS. 6, 7 and  8 . The flange  72  has a relaxed configuration in which it is not pressed upon by the stud  62 . This is shown in FIG. 6. In this configuration, when the flange engages the stop  76 , further opening movement is prevented, and thus the maximum opening angle for the data terminal mode is defined. Additionally, the flange has a compressed configuration, in which the stud  62  presses the flange  72  into the recess. This happens when the mobile station is set into the telephone mode, that is the upper storage element  11  is brought next to the electronics housing element  13 . In this compressed configuration, the first abutment surface  73  of the flange  72  can avoid the stop  76 , and the flange slides through the gap. Thus, the mobile station can open until the flange is fully received by the recess  74 , that is until the first abutment surface  73  engages the third abutment surface  77  of the recess. When the abutment surfaces are in contact, the battery housing element  12  and the electronics housing element  13  are stopped from opening any further.  
         [0065]    The present invention provides several advantages over the prior art. A mobile station according to the invention occupies in its transportation mode a fraction of its fully opened size. In addition, it also has an intermediate configuration provided to enable the mobile station to be used for telephony. The invention can be applied to mobile telephones, personal digital assistants and small laptop computers to provide a screen of a presentation size. Alternatively it can be used for interactive posters in exhibitions, electronic games, user interfaces of various types of home and business electronics like hi-fi-sets, car audio systems, and multimedia devices used, for example, in aeroplanes.  
         [0066]    This paper presents the implementation and embodiments of the invention with the help of examples. It is obvious to a person skilled in the art, that the invention is not restricted to details of the embodiments presented above, and that the invention can be implemented in another embodiment without deviating from the characteristics of the invention. The invention was here described using the most complex embodiment as an example, but naturally the invention can also be implemented in a device comprising merely a retracting keyboard without neither display properties nor mobile telephone functionality etc. Thus, the presented embodiments should be considered illustrative, but not restricting. Hence, the possibilities of implementing and using the invention are only restricted by the enclosed patent claims. Consequently, the various options of implementing the invention as determined by the claims, including the equivalent implementations, also belong to the scope of the present invention.