Patent Publication Number: US-2003234820-A1

Title: Method and apparatus for controlling a display unit

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS  
       [0001] This application claims the priority of Korean Patent Application No. 2002-34294 filed on Jun. 19, 2002 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.  
       BACKGROUND OF THE INVENTION  
       [0002] 1. Field of the Invention  
       [0003] The present invention relates to a display unit, and, more particularly, to a method and an apparatus for controlling a display unit.  
       [0004] 2. Description of the Related Art  
       [0005] Current liquid crystal display (LCD) display units have a “Menu” button, a “+” or “−” button, and a selection button on the external surface so that a user can control information on the brightness, contrast, or geometry thereof. In a case where a display unit is controlled by physically pressing buttons on its external surface, when the “Menu” button is selected, the maximum number of colors that an image displayed on the screen can have is limited, and the outer appearance of the display unit cannot be designed without the buttons on its external surface. Further, if a display unit of a personal computer cannot be controlled by external buttons, the display unit cannot be controlled in a WINDOWS, DOS, LINUX, UNIX, or Mac OS environment. Thus, the user cannot conveniently and easily control the display unit using a mouse.  
       SUMMARY OF THE INVENTION  
       [0006] Accordingly, the invention provides a method of conveniently and easily controlling a display unit, which does not require additional buttons on its external surface to control the display unit, so that costs for manufacturing the display unit can be reduced.  
       [0007] The invention provides an apparatus for performing the display unit controlling method.  
       [0008] Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.  
       [0009] According to an aspect of the present invention, there is provided a method of controlling a display unit having a first serial port that is connected to a personal computer having a second serial port. The first serial port is connected to the second serial port via a cable. A menu of the display unit is controlled using the personal computer.  
       [0010] Also, the method determines whether a user wishes to control the display unit, upon that determination displaying a menu image corresponding to the menu via the display unit, determining an icon selected by the user from the displayed menu image, displaying a controllable image corresponding to the determined icon via the display unit, determining a result that the user chooses in the displayed controllable image as a control value of the selected icon, and transmitting the control value and the selected icon from the personal computer to the display unit via the cable, wherein the display unit controls a display unit function represented by the transmitted icon by the control value.  
       [0011] According to another aspect of the present invention, there is provided an apparatus for controlling a display unit having a first serial port that is connected to a personal computer having a second serial port. The apparatus includes a control checker, a storage unit, a first image outputting unit, an icon identifier, a second outputting unit, a control value identifier, and a transmitter. The control checker checks whether a user wishes to control the display unit and outputs the checked result as a control signal. The storage unit stores a menu image of the display unit and a controllable image corresponding to at least one of the icons marked on the menu image. The first image outputting unit reads the menu image from the storage unit and outputs the menu image to the display unit in response to the control signal. The icon identifier identifies an icon selected by the user from the menu image output from the first image outputting unit and displayed on the display unit and outputs the identified result. The second outputting unit that reads the controllable image corresponding to the identified result from the storage unit and outputs the controllable image to the display unit. The control value identifier identifies a result the user chooses in the controllable image output from the second image outputting unit and displayed on the display unit and outputs the identified result as a control value of the selected icon. The transmitter transmits the identified result input from the icon identifier and the control value input from the control value identifier to the display unit. It is preferable that the first serial port is connected to the second serial port via a cable, and the display unit displays the menu image input from the first image outputting unit and the controllable image input from the second image outputting unit and adjusts a display unit function represented by the icon corresponding to the identified result transmitted from the transmitter by the transmitted control value. 
     
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
     [0012] These and/or other aspects and advantages of the invention will become apparent and more readily appreciated from the following description of the preferred embodiments taken in conjunction with the accompanying drawings in which:  
     [0013]FIG. 1 is a flowchart explaining a method of controlling a display unit according to an embodiment of the present invention;  
     [0014]FIG. 2 is a view explaining the method of controlling the display unit shown in FIG. 1;  
     [0015]FIG. 3 is a flowchart explaining operation  12  shown in FIG. 1;  
     [0016]FIG. 4 is an exemplary view of a menu image displayed on a display unit;  
     [0017]FIG. 5 is an exemplary view of a controllable image displayed when a geometry icon is confirmed;  
     [0018]FIG. 6 is an exemplary view of a controllable image displayed when a screen icon is confirmed in operation  44 ; and  
     [0019]FIG. 7 is a block diagram of an apparatus for performing the method of controlling a display unit shown in FIG. 3. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
     [0020] Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.  
     [0021] An example of the type of display unit controlled by these embodiments of the present invention is a monitor. To assist in explaining the present invention, throughout the description it will be assumed that the display unit is a monitor. However, the present invention is not limited to a monitor.  
     [0022]FIG. 1 is a flowchart explaining a method of controlling a display unit according to an embodiment of the present invention. The method comprises operations  10  and  12  of connecting a display unit to a personal computer (PC) via a cable and controlling a menu of the display unit.  
     [0023]FIG. 2 is a view explaining the display unit controlling method shown in FIG. 1. Here, a display unit  20  and a PC  22  are shown.  
     [0024] In the display unit controlling method according to this embodiment of the present invention, as shown in FIG. 2, in operation  10 , a first serial port  24  of the display unit  20  is connected to a second serial port  26  of the PC  22  via a cable  28 . Here, the display unit  20  generally serves to support the cable  28  regardless of the type of the display unit  20 . The display unit  20  may be a cathode ray tube (CRT) display unit or an LCD display unit.  
     [0025] Here, a serial port means a port for communication, such as an RS232 port or a USB (Universal Serial Bus) port. To assist in explaining the present invention, throughout the description it will be assumed that the serial port is an RS232 port. However, the present invention is not limited to an RS232 port.  
     [0026] After operation  10 , the PC  22  controls a menu of the display unit  20  in step  12 . According to this embodiment of the present invention, the PC  22  can control the menu of the display unit  20  in a WINDOWS, DOS, LINUX, UNIX, or MAC OS environment.  
     [0027]FIG. 3 is a flowchart explaining an aspect  12 A of operation  12  shown in FIG. 1. The operation  12 A comprises operations  40 ,  42 , and  44  of a user selecting a desired icon from a menu image displayed when the user desires to control the display unit  20 , and operations  46 ,  48 , and  50  of calculating a control value of the selected icon and transmitting the control value and the selected icon to the display unit  20 .  
     [0028] After operation  10 , the PC  22  continues to determine whether the user would like to control the display unit  20  in operation  40 .  
     [0029] If the PC  22  determines that the user desires to control the display unit  20 , the PC  22  displays the menu image showing the menu of the display unit  20  to the user via the display unit  20  in operation  42 . Here, the menu image displayed on the display unit  20  may include geometry icons, position icons, brightness icons, contrast icons, color icons, and the like. The geometry icons are selected so that a screen can be displayed on the display unit  20  as a geometrical, e.g., lozenge-shaped, trapezoid-shaped, or parallelogram-shaped. Also, the position icons are selected to change the position of the screen displayed on the display unit  20 , e.g., move the screen in a horizontal direction or a vertical direction. The brightness icons are selected to brighten or darken the screen displayed on the display unit  20 . The contrast icons are selected to increase or decrease the contrast of the screen displayed on the display unit  20 . The color icons are selected to adjust the color of the screen displayed on the display unit  20 .  
     [0030]FIG. 4 is an exemplary view of a menu image displayed on the display unit  20 . The menu image include a brightness increase icon  60 , a brightness decrease icon  62 , a contrast increase icon  64 , a contrast decrease icon  66 , a position upward icon  68 , a position downward icon  70 , and a standard control icon  72 .  
     [0031] Here, the position upward icon  68  and the position downward icon  70  correspond to the previously described position icons. The standard control icon  72  is selected to automatically set brightness, contrast, and colors of the screen displayed on the display unit  20  to predetermined values.  
     [0032] If it is determined that the user would like to control the display unit  20  in the display unit controlling method according to an embodiment of the present invention, for example, the menu image as shown in FIG. 4 may be displayed to the user in operation  42 .  
     [0033] After operation  42 , in operation  44 , the PC  22  determines the icon selected by the user from the menu image displayed on the display unit  20 . In other words, if the user selects a desired icon from the displayed menu image, the icon that has been selected is confirmed in the display unit controlling method according to this embodiment of the present invention. Here, the user can select a desired icon from the displayed menu image using a mouse (not shown). More particularly, the user can move the mouse&#39;s position indicator to the desired icon, and select the desired icon by clicking the mouse button.  
     [0034] After operation  44 , the PC  22  displays a controllable image corresponding to the confirmed icon to the user via the display unit  20  in operation  46 .  
     [0035]FIG. 5 is an exemplary view of a controllable image displayed when a confirmed icon is a geometry icon. The controllable image has a plurality of progress bars  80 ,  82 ,  84 , and  86 .  
     [0036] If the user selects the geometry icon from the menu image in the display unit controlling method according to this embodiment of the present invention, for example, the controllable image as shown in FIG. 5 is displayed to the user via the display unit  20  in operation  46 .  
     [0037]FIG. 6 is an exemplary view of a controllable image displayed when the icon confirmed in operation  44  is a screen icon. The controllable image has a plurality of progress bars  90 ,  92 ,  94 ,  96 , and  98 . Here, the screen icon includes a brightness icon, a contrast icon, and a color icon. The color icon has progress bars  94 ,  96 , and  98  corresponding to red R, green G, and blue B.  
     [0038] After operation  46 , the result that the user chooses in the displayed controllable image is determined as a control value of the selected icon. For example, when the controllable image shown in FIG. 5 or  6  is displayed, the user manipulates the progress bar  80 ,  82 ,  84 ,  86 ,  90 ,  92 ,  94 ,  96 , or  98  using a mouse or the like. Then, a control value of a corresponding icon is determined.  
     [0039] After operation  48 , the control value and the selected icon are transmitted from the PC  22  to the display unit  20  via the cable  28  in step  50 . Here, the display unit  20  controls the icon received from the PC  22  by the control value. For example, if the user clicks on a left bar  100  of the progress bar  90  using the mouse to control the brightness icon, a pointer  104  moves to the left and the controllable image darkens. If the user clicks on a right bar  102 , the pointer  104  moves to the right and the controllable image brightens. If the user stops clicking on the mouse, a value designated to the position of the pointer  104  is determined as a control value of the brightness icon.  
     [0040] Hereinafter, the structure and operation of an apparatus for performing the display unit controlling method according to an embodiment of the present invention will be described with reference to FIGS. 3 and 7.  
     [0041]FIG. 7 is a block diagram of an apparatus for performing the display unit controlling method according to an embodiment of the present invention described with reference to FIG. 3. The apparatus includes a control checker  110 , a storage unit  112 , first and second image outputting units  114  and  118 , an icon identifier  116 , a control value identifier  120 , and a transmitter  122 .  
     [0042] The apparatus shown in FIG. 7 is included in the PC  22  shown in FIG. 2. Here, to perform operation  40  of FIG. 3, the control checker  110  checks whether the user wishes to control the display unit  20 , and outputs the result of the check as a control signal to the first image outputting unit  114 . For example, if a display unit control icon indicating that the display unit  20  is to be controlled is displayed on the display unit  20 , the user selects the display unit control icon using the mouse or the like to control the display unit  20 . In this case, when the user clicks on the display unit control icon using the mouse, the control checker  110  receives a signal via an input port IN 1  to indicate that the user wishes to control the display unit  20 . Alternatively, an additional key (not shown) representing a display unit control icon may be prepared on a keyboard (not shown) so that the user can press the additional key to control the display unit  20 .  
     [0043] To carry out operation  42 , the first image outputting unit  114  reads a menu image from the storage unit  112  and outputs the read menu image to the display unit  20  through the cable  28  and via an output port OUT 1  in response to the control signal input from the control checker  110 . For example, if the first image outputting unit  114  perceives from the control signal that the user wishes to control the display unit  20 , the first image outputting unit  114  outputs the menu image read from the storage unit  112  to the display unit  20  via the output port OUT 1 . For this, the storage unit  112  stores the menu image of the display unit  20 . Here, the display unit  20  displays the menu image input from the first image outputting unit  114 .  
     [0044] To perform operation  44 , the icon identifier  116  identifies an icon selected by the user from the menu image output from the first image outputting unit  114 , and displayed on the display unit  20 , and then outputs the identified result to the second image outputting unit  118 . For example, the user selects a desired icon from the menu image displayed on the display unit  20  using the mouse or the like. In this case, when the user clicks on the desired icon using the mouse, the icon identifier  116  receives a signal via an input port IN 2  to identify the icon selected by the user.  
     [0045] To perform operation  46 , the second image outputting unit  118  reads a controllable image corresponding to the icon selected by the user, from the storage unit  112  using the identified result input from the icon identifier  116 , and then outputs the controllable image to the display unit  20  through the cable  28  and via the output port OUT 2 . For this, the storage unit  112  stores a controllable image corresponding to at least one of the icons of the menu image displayed on the display unit  20 . Here, the display unit  20  displays the controllable image input from the second image outputting unit  118 .  
     [0046] To carry out operation  48 , the control value identifier  120  identifies the result that the user designates in the controllable image output from the second image outputting unit  118 , displayed on the display unit  20 , and then outputs to the transmitter  122  the identified result as a control value of the selected icon. For example, the user points a progress bar of a desired icon, e.g., the progress bar  80 ,  82 ,  84 ,  86 ,  90 ,  92 ,  94 ,  96 , or  98 , in the controllable image displayed on the display unit  20 , e.g., the controllable image shown in FIGS.  5  or  6 , using the mouse or the like and adjusts a value of the desired icon to a desired value. In this case, when the user clicks on desired progress bar using the mouse, the control value identifier  120  receives a signal generated by the mouse via an input port IN 3  to identify the choice of the user.  
     [0047] To perform operation  50 , the transmitter  122  transmits the identified result input from the icon identifier  116 , i.e., the icon selected by the user and the control value input from the control value identifier  120 , to the display unit  20  via an outpurt port OUT 3 , and through the cable  28 . Here, the display unit  20  adjusts a display unit function corresponding to the identified result transmitted from the transmitter  122  by the transmitted control value.  
     [0048] Alternately, the operations of the apparatus of FIG. 7 could be implemented by permanent or removable digital storage, such as magnetic and optical discs, RAM, ROM, etc., on which the operations and data structures of the present invention can be stored and distributed. The operations can also be distributed via, for example, downloading over a network such as the Internet.  
     [0049] As described above, unlike a conventional display unit controlling method in which a display unit has to include an additional control chip (not shown) capable of supporting USB to connect the display unit to a PC via the USB, in a method and an apparatus for controlling a display unit according to an embodiment of the present invention, a display unit  20  is connected to a PC  22  via a cable  28 . Thus, the display unit  20  does not require an additional control chip for supporting the cable  28  so that costs for manufacturing the display unit  20  can be reduced. Also, a user can conveniently and easily control the display unit  20  using a mouse, a scroll bar, or various other functions provided in WINDOWS. In addition, a menu image can be generated without limiting the number of colors. Furthermore, a display unit can be designed without buttons for controlling the display unit so as to meet the trend toward emphasis on a sleek outer appearance, such as an LCD display unit.  
     [0050] Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in this embodiment without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.