Abstract:
An interfacing device for PDA/wireless terminal is disclosed. The interfacing device of the wireless terminal includes: a main housing provided with a main liquid crystal display (LCD) and a plurality of keys; a speaker housing which opens/closes at the main housing; a hinge means for connecting the main housing with the speaker housing; and a key top housing, which is connected to the hinge means, includes a designated shape window and an array of a plurality of keys, and opens and closes inbetween the main housing and the speaking housing, in which an auxiliary LCD is mounted at a designated position of the speaker housing to help a user to interface the auxiliary LCD through the window when the keypad housing is opened. The device has increased the convenience of use a great deal.

Description:
PRIORITY 
   This application claims priority to an application entitled “User interfacing device for PDA/wireless terminal” filed in the Korean Industrial Property Office on Sep. 29, 2001 and assigned Serial No. 01-61000, the contents of which are hereby incorporated by reference. 
   BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates generally to a portable wireless terminal including a cellular phone, personal digital assistance (PDA), and hand held phone (HHP). In particular, the present invention relates to a user interfacing device for a portable wireless terminal, which enables a user to select one mode out of PDA mode and cellular phone mode. 
   2. Description of the Related Art 
   In general, a cellular phone means a mobile station which is capable of providing a user and another party with wireless communication service while performing wireless communication with a base station. Sometimes, the cellular phone is classified into a bar-type, a flip-type, or a folder-type phone according to its outward appearance. Also, depending on where a user puts on, the cellular phone could be classified into a wrist-type or a neck wearable-type phone. Further, the cellular phone could be classified according to usage or function, for example, a voice communication use phone, a visual communication use phone, a game use phone or an Internet communication use phone. In the future, however, a greater variety of phones equipped with enhanced wearing convenience and convenience of use will be widely available. In particular, a combined multi-functional wireless terminal equipped with diverse modes is expected to be popular. 
   Among other terminals listed above, a cellular phone currently being universalized includes a data input/output unit typically used for text messaging, a transmitting/receiving unit, and an antenna. As for the data input unit, a keypad having a plurality of keys is usually used, and as for the data output unit, a liquid crystal display (LCD) is used. Also, a microphone is used as the transmitting unit, and a speaker is used as the receiving unit. In the alternative, a touch screen or a voice recognition device can be used as the data input unit. If it is necessary to input more complex data, the user needed to purchase a personal digital assistant (PDA). 
   However, there are several problems associated with the wireless terminal currently being universalized. Although more people prefer lighter and smaller cellular phones, the small main body of the phone cannot be accomplished unless the keypad including the LCD and the plurality of keys is also miniaturized. However, if the LCD is miniaturized, the user will find it difficult to check the data thereon. Also, if the keypad is miniaturized, it will be hard to input data by pressing the keys using a finger. This is why some industries are hesitant to miniature the wireless terminal because they know it would be very difficult to make the cellular phone yet enlarge the LCD and the keypad at the same time. 
   Nevertheless, it is inevitable that a multi-functional wireless terminal will be developed to keep abreast of a greater variety of Internet environment, requiring more keys and a larger LCD to perform diverse functions. In other words, the wireless terminal currently being used is not sufficient to satisfy the user&#39;s different needs in addition to making phone calls, such as, sending emails or chatting through the PDA and receiving other additional services. Therefore, more keys and a large LCD are definitely necessary to keep up with growing needs of the users. That is to say, a data input/output device providing more convenience to the data input/output operation is desirable for the wireless terminal. 
   SUMMARY OF THE INVENTION 
   It is, therefore, an object of the present invention to provide a user interfacing device for PDA/wireless terminal that can be used for a cellular phone and a PDA. 
   It is another object of the present invention to provide a user interfacing device for PDA/wireless terminal, which displays data through an auxiliary LCD to a speaker housing when the user interfacing device is used as the PDA only. 
   It is still another object of the present invention to provide a user interfacing device for PDA/wireless terminal, which is capable of operating a specific application displayed on an auxiliary LCD by one clicking. 
   To achieve the above objects, there is provided a PDA/wireless terminal, which includes a main housing with a main LCD and a plurality of keys. A speaker housing opens and closes at the main housing. A hinge means connects the main housing with the speaker housing. A key top housing is connected to the hinge means, and includes a designated shape window and a plurality of keys in an array, and opens and closes inbetween the main housing and the speaking housing. An auxiliary LCD is mounted at a designated position of the speaker housing to allow a user to interface the auxiliary LCD through the window when the keypad housing is opened. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which: 
       FIG. 1  is a prospective view showing a closed speaker housing of a PDA/wireless terminal in accordance with a preferred embodiment of the present invention; 
       FIG. 2  is a prospective view showing a completely opened speaker housing of a PDA/wireless terminal in accordance with the preferred embodiment of the present invention, especially when the PDA/wireless terminal is used as a cellular phone; 
       FIG. 3  is a prospective view showing a state in which a keypad housing of a PDA/wireless terminal in accordance with the preferred embodiment of the present invention is being opened; 
       FIG. 4  is a prospective view showing a completely opened keypad housing of a PDA/wireless terminal in accordance with the preferred embodiment of the present invention, when the PDA/wireless terminal is primarily used as a PDA; and 
       FIG. 5  is a prospective view showing a PDA/wireless terminal having a transparent window in accordance with another preferred embodiment of the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   Preferred embodiments of the present invention will be described herein below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. 
   The wireless terminal mounted with a user interfacing device according to the present invention can be used as a cellular phone and a personal digital assistance (PDA) as well.  FIG. 1  shows a portable wireless terminal.  FIG. 2  diagrammatically shows a wireless terminal in a cellular phone mode.  FIG. 4  diagrammatically shows a wireless terminal in a PDA mode. That is to say, a user should be aware that the wireless terminal of the present invention can be used for either the cellular phone mode or the PDA mode, depending on whether a keypad housing  30  is opened or closed. 
   The configuration of the wireless terminal according to the present invention will now be explained with reference to  FIGS. 1 through 4 . In general, the wireless terminal in accordance with one embodiment of the present invention includes three rotary housings  10 ,  20 , and  30  which are connected to one hinge means H and may be rotated with respect to one another at hinge means H, and two liquid crystal displays (LCD) provided to two selected housings out of the three housings. More specifically, the three housings includes a main housing  10  that supports the base of the one hinge means H, a speaker housing  20 , and a key top housing  30  disposed inbetween the main housing  10  and the speaker housing  20 . The key top housing  30  and the speaker housing  20  are connected with main housing  10  at hinge means H. 
   The two LCDs include a main LCD  110  provided to the main housing  10 , and an auxiliary LCD  210  provided to the speaker housing  20 . The main LCD  110  is a wide LCD disposed on a top surface of the main housing  10 , best seen in  FIGS. 3 and 4 , while the auxiliary LCD  210  is disposed at a designated position on a bottom surface  20   a  of the speaker housing  20 . The designated position for the auxiliary LCD  210  to be installed proximal to a hinge axis A of hinge means H. 
   The main housing  10 , the speaker housing  20 , and the key top housing  30  open and close up to a call angle around the hinge axis A, as shown in  FIGS. 2 and 4 . The call angle means an amount of rotation angle of the speaker housing  20  or the bidirectional key top housing  30  around the main housing  10 . The call angle of the speaker housing  20  or the key top housing  30  is in range of from approximately 135 deg. to 160 deg. 
   The terminal depicted in  FIG. 1  is closed, indicating that the speaker housing  20  or the key top housing  30  is closed with respect to the main housing  10 . As shown in the drawing, the terminal includes the main housing  10 , the key housing  30  which is disposed on the main housing  10 , and the speaker housing  20  which is disposed on the key top housing  30 . The main housing  10 , the speaker housing  20  and the key top housing  30  are all connected about axis A via hinge means H. The speaker housing  20  of the terminal opens at the same time when it is desirable for the key top housing  30  to open. The reference numeral  211  indicates a notch which is projected to an opposite direction from the speaker housing in order to make it easier to open/close the speaker housing. 
   Now referring to  FIGS. 2 through 4 , the speaker housing  20  includes a top surface  20   b  and a bottom surface  20   a , and a speaker  220  and an auxiliary LCD  210  are mounted at designated positions on the bottom surface  20   a . Preferably, the auxiliary LCD  210  is mounted on speaker housing near axis A. In short, the speaker  220  is placed far from the hinge axis A, while the auxiliary LCD  210  is placed near to the hinge axis A. 
   Similar to the speaker, the key top housing  30  includes two sides, that is, a top surface  30   a  and a bottom surface  30   b , and a keypad having a plurality of keys  311  arrayed and a window  310  are mounted at the top surface  30   a . In general,  FIG. 2  shows that the keypad on the top surface  30   a  consists of arranged keys  311  mainly for use of voice communication, or a cellular phone, including a send key and a power key. On the other hand,  FIG. 4  shows that there are contact use projectors  311   a  arrayed on the bottom surface  30   b  of the key top housing  30 , so when the user presses a selected key  311 , the projectors are in touch with the wide LCD  110 . When operating as a cellular phone, depressing one of the keys  311  causes the respective projector  311   a  to contact the respective portion of the touch sensitive LCD  110 . 
   In addition, the window  310  may be an opening or a transparent window. In case the wireless terminal is used as a cellular phone, the window  310  enables the user to check the data displayed on the wide LCD  110  that is mounted at the main housing  10 , without actually opening the key top housing  30 . On the other hand, if the wireless terminal is used as the PDA, the window  30  enables the user to check the data displayed on the auxiliary LCD  210 , without opening the keypad housing. 
   Also, call related information and icons displaying date, time, receive sensitivity of the antenna or residual amount of a battery are displayed on an upper portion of the wide LCD  110 , and the user can check the displayed data through the window  310  while the terminal is being in the cellular phone mode. 
   Preferably, the auxiliary LCD  210  is used as a launcher. That is, a normal user, given that the user&#39;s several favorite application tools for use of launcher are pre-designated as some icons, can simply click the icons using a finger or a pen to initiate the operation. More specifically, the primary function of the auxiliary LCD  210  is to help the user to execute the application he or she wants by one single click, just like clicking a dedicated icon on the desktop of a computer, without undergoing several input procedures to execute that particular application. Moreover, the auxiliary LCD  210  can be replaced by a touch screen that can be employed as an input window for a handwriting input program. 
   In addition, the wide LCD  110  is mounted on the top surface  101  of the main housing  10 , covering a large portion of the main housing. The wide LCD  110  also acts as a GUI with a touch screen for data input/output. In this manner, the user can input data through the wide LCD  110  and output the inputted data. 
   The operation of the wireless terminal according to the present invention is now explained below. 
   First, if the wireless terminal is in the cellular phone mode, that is, if the speaker housing  20  is opened and the keypad housing  30  is closed with respect to the main housing  10 , the user inputs a wanted data by pressing a key  311  using a finger. The inputted data is displayed on the upper portion of the wide LCD  110 , and the user can check the displayed data through the window  310 . Additionally, by installing a sensor (not shown) to the keypad housing  30  for detecting an auto switching state, if the user clicks the auxiliary LCD  210  while the speaker housing  20  is opened, the auxiliary LCD  210  is automatically used as the launcher. Next, if the speaker housing  20  and the keypad housing  30  are opened from the main housing  10 , the wireless terminal is put in the PDA mode. In such case, the user may use the wireless terminal as the PDA, and at the same time, he or she can interface the auxiliary LCD  210  through the window  310 . 
   As shown in  FIG. 5 , the window provided to the keypad housing can be replaced by a transparent window  320 . 
   In conclusion, by using the PDA/wireless terminal according to the present invention in which the auxiliary LCD is used as the launcher in the speaker housing, it became possible for the user to execute a specific application by a single click. Shortly speaking, the present invention greatly improved the user&#39;s convenience because all he or she has to do is to click a particular application he or she wants to execute on the auxiliary LCD, and even better, this consequently brought a wider LCD. 
   While the invention has been shown and described with reference to a certain preferred embodiment thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.