Abstract:
A separable build-in mouse input device, which combines with a common build-in mouse input device for a portable computer and an optical mouse module applying with the wireless transmission technique, equips in a portable computer via a link unit as a build-in mouse, or flip out as an isolated optical mouse. Applying with this device, the input selectivity for portable computer users in increased, and the convenience for conventional portable computer users of carrying a mouse to link with the portable computer instead is improved. In sum, this device is featured combining with the build-in input unit of a portable computer, or removing as an isolated optical mouse to a portable computer.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    (1) Field of the Invention  
           [0002]    The present invention relates to a mouse cursor input device and, in particular, to a separable build-in mouse input device implementing wireless transmission technology, which is suitable for portable electronic information processing apparatus such as portable computers, Tablet PCs, electronic satchels, electronic books, and Web Pads.  
           [0003]    (2) Description of the Related Art  
           [0004]    Due to the rapid development of technology, the market lead by the semiconductor and information industries grows vigorously and continuously, thus brings about many changes on the application level. These changes not only result in technology achievements, but also improve the quality and the pattern of human lives. Various kinds of electronic consuming products, such as personal computers, mice, scanners, mobile phones, and PDAs are also affected, and people&#39;s requirements for these electronic products are thus stricter. While moving from the professional field into the general consuming market, various requirements for these electronic products, such as the concept of ergonomics design, has been conducted.  
           [0005]    Most portable computers incorporate built-in touch pads, track balls, or track sticks as its mouse cursor input devices. These devices are designed to satisfy the requirements of portability and limited spaces of portable computers. However, when compared with conventional mice, these built-in mouse cursor input devices are not user-friendly to users. Although most portable computers provide external connectors for users to connect conventional mice, it is still inconvenient since the users have to bring extra mice and connect/disconnect the mice to/from the portable computers.  
           [0006]    However, if one can implement mechanical design concepts to re-design a conventional mouse for portable computers into a separable one, then the mouse has more flexibility and can have different ways of usage depending on different occasions. For instance, the mouse can be combined into the portable computer when no stable and flat operation surface is available, and can be separated from the portable computer when a flat operation surface is available. Therefore, how to design a separable input device has become an important problem to be solved.  
         SUMMARY OF THE INVENTION  
         [0007]    In view of the above, an objective of the invention is to provide a separable build-in mouse input device, which combines the touch pad, the touch stick, or the track ball of a portable computer, shares the functions of its buttons and/or rollers, and is an independent input device.  
           [0008]    To achieve the above-mention objective, the separable build-in mouse input device according to the invention includes an information processing apparatus and a mouse input device, which are signally connected together for inputting information. The information processing apparatus includes a radio frequency receiver for receiving a radio frequency signal transmitted from the separable mouse input device, a system embedded controller for controlling the switch of power of the radio frequency receive, and a mouse sensing module using the ground of the mouse input device as a detection signal for the system embedded controller to judge if the mouse input device is removed. The mouse input device includes a radio frequency transmitter for transmitting the information of the mouse controller via the radio frequency signal, a power supply unit for providing power to the mouse input device when the mouse input device is removed from the information processing apparatus, and a power control circuit for detecting the ground of the information processing apparatus to judge whether the mouse input device is removed, and switches the power of the mouse input device.  
           [0009]    According to one aspect of the invention, the radio frequency signal may be transmitted via radio frequency using ISM (Industry-Science-Medical) frequency band of 2.4 GHz.  
           [0010]    According to another aspect of the invention, the information processing apparatus may further include a mouse battery charger for providing power to the mouse input device and charges the mouse input device. The mouse battery charger may stop charging the separable mouse input device when the main battery of the information processing apparatus is at a low-power status and the information processing apparatus uses its main battery as the only power source.  
           [0011]    According to still another aspect of the invention, the first connecting unit and the second connecting unit may be of spring-type design or slot-type design.  
           [0012]    According to still another aspect of the invention, the input module may be a touch pad, a track ball, or a track stick module. The information processing apparatus might be a portable computer, a tablet PC, an electronic satchel, an electronic book, or a web pad.  
           [0013]    These and other features, aspects and advantages of the invention will become better understood with regard to the following description and accompanying drawings.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0014]    [0014]FIG. 1 is a block diagram showing the architecture of the portable computer and the separable mouse input device according an embodiment of the present invention.  
         [0015]    [0015]FIG. 2 is a schematic diagram showing the separable mouse input device according the embodiment of the present invention.  
         [0016]    [0016]FIG. 3A is a flowchart showing the operation of the separable mouse input device when being removed from the portable computer.  
         [0017]    [0017]FIG. 3B is a flowchart showing the operation of the separable mouse input device when being removed from the portable computer. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0018]    The separable mouse input device according to an embodiment of the invention will be described with reference to the accompanying drawings, wherein the same reference numbers denote the same elements.  
         [0019]    Referring to FIG. 1, the separable mouse input device  200  according to an embodiment of the present invention is implemented in a portable computer  100 . The portable computer  100  and the separable mouse input device  200  are connected together for a user to input information. However, it should be noted that the invention is not limited to portable computers, and can be implemented in various kinds of electronic information processing apparatus, such as Tablet PCs, electronic satchels, electronic books, and Web Pads.  
         [0020]    The portable computer  100  includes a radio frequency receiver  110 , a P/S2 interface  120 , a mouse battery charger  130 , a mouse sensing module  140 , a system embedded controller  150 , and a first connector unit  160 . The separable mouse input device  200  includes a radio frequency transmitter  210 , a mouse controller  220 , an input module  230 , an optical mouse sensor module  240 , a power supply unit  250 , a power control circuit  260 , and a second connecting unit  270 . Below are detailed descriptions of the components mentioned above.  
         [0021]    The radio frequency receiver  110  receives the radio frequency signal transmitted from the separable mouse input device  200 . When receiving the radio frequency signal, the radio frequency receiver  110  issues a command signal. In the present embodiment, the radio frequency signal is transmitted via radio frequency, and uses the ISM (Industry-Science-Medical) frequency band of 2.4 GHz.  
         [0022]    The mouse battery charger  130  provides power to and charges the separable mouse input device  200  when the portable computer  100  is connected to the separable mouse input device  200 . In the present embodiment, the mouse battery charger  130  stops charging the separable mouse input device  200  when the main battery of the portable computer  100  is at a low-power status and the portable computer  100  uses its main battery as the only power source.  
         [0023]    The P/S2 interface  120  transmits the data received by the radio frequency receiver  110  to the portable computer  100  to process the data received.  
         [0024]    The system embedded controller  150  is a built-in control circuit for controlling the P/S2 interface  120 , the mouse battery charger  130 , and the switch of the power of the radio frequency receiver  110 .  
         [0025]    The mouse sensing module  140  detects the ground of the separable mouse input device  200 , and sends the detection result to the system embedded controller  150  to judge if the separable mouse input device  200  is removed.  
         [0026]    The first connecting unit  160  is for connecting with the separable mouse input device  200 , and can use a spring-type design or a slot-type design.  
         [0027]    The radio frequency transmitter  210  transmits the information of the mouse controller  220  via radio frequency signals. In the present embodiment, the radio frequency signal is transmitted via radio frequency, and uses the ISM (Industry-Science-Medical) frequency band of 2.4 GHz.  
         [0028]    The mouse controller  220  includes the button of the mouse, the roller, and the X/Y axes motion-coding controller.  
         [0029]    The input module  230  is a standard build-in input device of the portable computer, which connects to the P/S2 interface  120  of the portable computer  100  via the first connecting unit  160 . The input module  230  may be a touch pad, a track ball or a track stick module.  
         [0030]    The optical mouse sensor module  240  calculates the X/Y axes displacement vectors using the optical image displacements, and provides the same to the mouse controller  220 . In the present embodiment, the optical mouse sensor module  240  includes a light emitting diode, a refraction plate, and an image displacement control circuit.  
         [0031]    The power supply unit  250  provides power to the separable mouse input device  200  when the separable mouse input device  200  is removed from the portable computer  100 .  
         [0032]    The power control circuit  260  detects the ground of the portable computer  100  to judge whether the separable mouse input device  200  is removed, and switches the power of the separable mouse input device  200 .  
         [0033]    The second connecting unit  270  is for connecting with the first connecting unit  160 , and can use a spring-type design or a slot-type design.  
         [0034]    It should be noted that in the present embodiment, the portable computer  100  and the separable mouse input device  200  could operate independently. When operating independently, the separable mouse input device  200  transmits the control signals input by the user to the portable computer  100 . It should also be noted that while the present embodiment uses a portable computer as an example, the invention is suitable for other electronic information processing apparatus, such as a tablet PC, an electronic book, an electronic satchel, a web pad, or a PDA.  
         [0035]    [0035]FIG. 2 is a schematic diagram of the separable mouse input device according to the embodiment of the present invention. Referring to FIG. 2, the separable mouse input device can be combined with, for example, conventional touch pad, as an independent module. This independent module can combine with a portable computer using a spring-type or a knife-type connector. When combined with a portable computer, only the touch pad and the buttons are exposed. When the independent module is removed from the portable computer, the touch pad is inactivated, and the wireless mouse function is activated to make the independent module a wireless mouse. Using this design, the user does not have to bring an extra mouse when he/she wants to use a mouse instead of a touch pad.  
         [0036]    According to the present embodiment, the separable mouse input device  200  is stored in the portable computer  100 . The input module  230 , which may be a touch pad, a track ball, or a track stick, connects to the P/S2 interface  120  using the second connector  270 , and is the main input device of the portable computer  100 . Except for charging the power supply unit  250  according to its volume, other units of the separable mouse input device  200  are under an inactive status.  
         [0037]    [0037]FIG. 3A is a flowchart showing the operation of the separable mouse input device  200  when being removed from the portable computer  100 . Referring to FIG. 3A, when the separable mouse input device  200  is separated from the portable computer  100 , the mouse sensing modulel 40  detects the event of the removal of the separable mouse input device  200  and issues a signal (step  300 ). This signal requests the system embedded controller  150  to issue a SCI (system control interrupt) (step  310 ). A SCI may make a mouse driver to switch the left/right buttons of the mouse. The system embedded controller  150  then sends out a hardware command signal (step  320 ), which turns on the power of the radio frequency receiver  110  to activate its function, and a software command to inactivate the function of the input module  230  (step  330 ). The power control circuit  260  of the separable mouse input device  200  starts to provide power to the separable mouse input device  200  (step  340 ).  
         [0038]    [0038]FIG. 3B is a flowchart showing the operation of the separable mouse input device  200  when being combined with the portable computer  100 . Referring to FIG. 3B, when the separable mouse input device  200  is combined with the portable computer  100  under a power-on status, the mouse sensing module  140  detects the separable mouse input device  200  and issues a signal (step  400 ). The signal is for requesting the system embedded controller  150  to reset the input module  230  (step  410 ), such as a touch pad, a track ball, or a track stick, and for inactivate the function of the wireless mouse. The power control circuit  260  stops providing power to the separable mouse input device  200 .  
         [0039]    If the separable mouse input device  200  is removed from the portable computer  100  when the portable computer  100  is at a power-on status, then it functions as an external wireless mouse. When separated from the portable computer, the separable mouse input device  200  may act as an optical wireless mouse transmitting information via radio frequency.  
         [0040]    The portable computer  100  may reserve space for the separable mouse input device  200 , and the separable mouse input device  200  features in that it shares the same touch pad and the buttons of other device controlling the mouse cursor.  
         [0041]    The portable computer  100  and the separable mouse input device  200  connect with each other using the first connect unit  160  and the second connecting unit  270 . When the separable mouse input device  200  is removed from the portable computer  100 , the space left in the portable computer  100  can be hidden using suitable mechanical design. Alternatively, the portable computer  100  may be left as it is without any modification in view of its esthetics and utility design.  
         [0042]    While the invention has been described with reference to a preferred embodiment, this description is not intended to be construed in a limiting sense. Various modifications of the embodiment will be apparent to persons skilled in the art upon reference to the description. It is therefore intended that the appended claims encompass any such modifications.