Patent Document

BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The invention relates to a recovering image system, and in particular relates to a recovering image system for a LCD panel with touch panel. 
         [0003]    2. Description of the Related Art 
         [0004]    The MVA (Multi-domain Vertical Alignment) panels have a tendency for showing a domain disturbance for a long period of time after mechanical stress occurs on the touch panel (or MVA panel). Accordingly, it makes the MVA panel less useful for touch panel applications since hand written information leaves undesired traces of push domains by the stylus. As long as the panel is only refreshed, this disturbance will not disappear. 
       BRIEF SUMMARY OF THE INVENTION 
       [0005]    A detailed description is given in the following embodiments with reference to the accompanying drawings. 
         [0006]    An embodiment of a recovering image system is provided. The recovering image system comprises a data inputting device, a driver and a panel. The data inputting device outputs digital data signals. The driver device receives the digital data signals, converts the digital data signals into analog data signals, and outputs the analog data signals or resets data signals according to timing control signals. The panel receives the analog data signals or the reset data signals and displays normal images, reset images or both according to the analog data signals and the reset data signals. 
         [0007]    Another embodiment of a recovering image system is provided. The recovering image system comprises a data inputting device, a driver and a panel. The driver device comprises a refresh data unit, a AND logic circuit, a timing control unit and a digital to analog converter (DAC). The data inputting device outputs digital data signals. The refresh data unit receives the digital data signal from the data inputting device and outputs serial digital signals. The AND logic circuit receives the serial digital signals and the timing control signals to output logic circuit signals. The timing control unit outputs the timing control signals according to a reset enable signal and a reset rate signal. The digital to analog converter converts the logic circuit signals into the analog data signals or the reset data signals according to the timing control signals. The panel receives the analog data signals or the reset data signals to display normal images, reset images or both according to the analog data signals and the reset data signals. When the driver device outputs the reset data signals, the panel displays the reset images. When the driver device outputs the analog data signals, the panel displays the normal images. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0008]    The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein: 
           [0009]      FIG. 1  is a schematic diagram of an image system without recovering; and 
           [0010]      FIG. 2  is a schematic diagram of a recovering image system according to an embodiment of the invention; 
           [0011]      FIG. 3  is a schematic diagram of a panel frame reset according to another embodiment of the invention; 
           [0012]      FIG. 4  is a schematic diagram of a panel row reset according to another embodiment of the invention; 
           [0013]      FIG. 5  is a schematic diagram of a panel area reset according to another embodiment of the invention; and 
           [0014]      FIG. 6  schematically shows another embodiment of a system for displaying images. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0015]    The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims. 
         [0016]      FIG. 1  is a schematic diagram of an image system  100  without recovering. Image system  100  comprises data inputting device  110 , driver IC  150  and panel  180 . Panel  180  comprises a LCD panel and a touch panel. The touch panel is disposed on top of the LCD panel. Driver IC  150  comprises memory  152 , refresh data unit  154  and digital to analog converter  158  (DAC). Data inputting device  110  directly outputs digital data signals to refresh data unit  154  or indirectly outputs digital data signals through memory  152  to refresh data unit  154 . Refresh data unit  154  outputs serial digital signals S 154  to digital to analog converter  158 . Digital to analog converter  158  converts serial digital signals S 154  into analog data signals S 158  for the panel  180 . Panel  180  receives analog data signals S 158  to display normal images. 
         [0017]      FIG. 2  is a schematic diagram of recovering image system  200  according to an embodiment of the invention. Recovering image system  200  comprises data inputting device  210 , a driver device  250  and panel  280 . The drive device  250  can be a drive IC. Panel  280  can comprise a LCD panel and a touch panel. The touch panel provides signals to represent a push domain area. The touch panel is disposed on top of the LCD panel. Driver IC  250  comprises memory  252 , refresh data unit  254 , timing control unit  255 , AND logic circuit  256 , digital to analog converter (DAC)  258  and Push Domain Detection unit  259 . Data inputting device  210  directly outputs digital data signals to refresh data unit  254  or indirectly outputs digital data signals through memory  252  to refresh data unit  254 . Refresh data unit  254  outputs digital signals to AND logic circuit  256 . AND logic circuit  256  receives digital signals S 254  and timing control signal S 255  and outputs logic circuit signal S 256  according to digital signals S 254  and timing control signal S 255 . Digital to analog converter (DAC)  258  receives logic circuit signal S 256  from AND logic circuit  256 . Digital to analog converter  258  converts logic circuit signal S 256  into analog data signals S 258  or reset data signals S 259  for panel  280 . Panel  280  receives analog data signals S 258  to display normal images when timing control signal S 255  is disabled. Otherwise, panel  280  receives reset data signals S 259  to display reset images when timing control signal S 255  is enabled. In addition, one frame can comprise normal images, reset images or both. The detail is discussed in following embodiments of the invention in  FIGS. 3 ,  4  and  5 . 
         [0018]    Timing control unit  255  outputs timing control signal S 255  according to reset enable signal S enable  and reset rate signal S rate . Reset signal S enable  can control driver IC  250  to reset panel  280  or not. Reset rate signal S rate  can control the reset rate of panel  280  and is adjustable by another controller (not shown). 
         [0019]    According to an embodiment of the invention, if timing control signal S 255  is low voltage level (logic 0), logic circuit signal S 256  is low voltage level when digital signals S 254  is high or low voltage level. When logic circuit signal S 256  is low voltage level, panel  280  is reset. After resetting panel  280 , the panel will show the normal images again. Timing control circuit unit  255  can output timing control signal S 255  to reset panel  280  at variable reset rates according to reset rate signal S rate . During resetting panel  280 , panel  280  turns black. The luminance of panel  280  drops according to the reset rate of reset rate signal S rate . By selecting an optimum reset rate, a balance can be found between the visibility of the push domain and the luminance loss. 
         [0020]    According to another embodiment of the invention, timing control unit  255  can output timing control signal S 255  to reset the push domain area of panel  280  according to the corresponding push domain control signal. Due to mechanical stress occurring on panel  280 , push domain Detection unit  259  can detect the push domain area of panel  280  to generate a corresponding push domain control signal for indicating locations of push domain areas of panel  280 . Timing control unit  255  can output timing control signal S 255  for resetting the push domain area of panel  280  according to the corresponding push domain control signals. Summarily, panel  280  can displays the reset images to restore the push domain areas of the panel. The detail is discussed as following. 
         [0021]    For example, panel  280  can be the combination of the MVA (Multi-domain Vertical Alignment) panel and the touch panel. Since the MVA panel has a tendency for showing a domain disturbance for a long period of time after mechanical stress occurs on the touch panel (or MVA panel). According to the above embodiments, timing control circuit unit  255  can output timing control signal S 255  to reset panel  280  at variable reset rates according to reset rate signal S rate . After resetting panel  280 , the panel will show the normal images again and the disturbance will not appear on panel  280  for a long period of time. It makes MVA useful for touch panel applications. 
         [0022]      FIG. 3  is a schematic diagram of a panel frame reset according to another embodiment of the invention. Panel  280  displays the reset images for n consecutive frames and the normal images for m consecutive frames. The reset images, as shown in  FIG. 3 , are blanked, meaning switching off panel  280  to display black images. 
         [0023]      FIG. 4  is a schematic diagram of a panel row reset according to another embodiment of the invention. Panel  280  displays reset images at certain rows of one frame for N consecutive frames according to a timing control signal. Next, panel  280  displays the reset images on shifted rows of one frame for next N consecutive frames as shown in  FIG. 4 . The reset images, meaning to switch off pixels at certain rows of panel  280 , will scan all areas of panel  280 . In addition, panel  280  comprises a plurality of pixels at different rows and different columns to form a matrix (not shown). 
         [0024]      FIG. 5  is a schematic diagram of a panel area reset according to another embodiment of the invention. Panel  280  display the reset images at first area of one frame for N consecutive frames. Next, panel  280  displays the reset images at second area of one frame for next N consecutive frames. The reset images, meaning to switch off pixels at certain areas of panel  280 , will scan all areas of panel  280 . 
         [0025]      FIG. 6  schematically shows another embodiment of a system for displaying images which, in this case, is implemented as recovering image system  200  or electronic device  600 . As shown in  FIG. 6 , recovering image system  200  comprises a driver IC  250  and panel  280  of  FIG. 2 . Recovering image system  200  can form a portion of a variety of electronic devices (in this case, electronic device  600 ). Generally, electronic device  600  can comprise recovering image system  200  and power supply  700 . Further, power supply  700  is operatively coupled to recovering image system  200  and provides power to recovering image system  200 . Electronic device  600  can be a mobile phone, digital camera, PDA (personal data assistant), notebook computer, desktop computer, television, GPS (global positioning system), automotive display, avionics display or portable DVD player, for example. 
         [0026]    While the invention has been described by way of example and in terms of preferred embodiment, it is to be understood that the invention is not limited to thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.

Technology Category: g