Patent Publication Number: US-2016239140-A1

Title: Touch screen display and bidirectional data transmission method

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Chinese Patent Application No. 201510074484.9, filed on Feb. 12, 2015, the contents of which are incorporated by reference herein. 
     FIELD 
     The subject matter herein relates to data transmission. 
     BACKGROUND 
     Touch screen displays are more and more popular. The touch screen display receives display signals from a host through a digital visual interface, and transmits touch control signals to the host through a universal serial bus interface. Thus, the touch screen display connects to the host through a digital visual cable and a universal serial bus. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Implementations of the present technology will now be described, by way of example only, with reference to the attached figures. 
         FIG. 1  is a block diagram of a touch screen display. 
         FIG. 2  is a flowchart of a bidirectional data transmission method. 
     
    
    
     DETAILED DESCRIPTION 
     It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features. The description is not to be considered as limiting the scope of the embodiments described herein. 
     The term “comprising” means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series, and the like. 
       FIG. 1  illustrates a touch screen display  10  including a display signal transmission interface  12 , a storage module  14 , a display control module  16 , a display panel  18 , a touch panel  20 , and a touch control module  22 . 
     The display signal transmission interface  12  communicates with a host  30 . The display signal transmission interface  12  is configured to receive display data transmitted from the host. The host  30  may be a computer or a personal digital assistant. The storage module  14  is configured to store the display data transmitted from the host  30 . The storage module  14  may be an electrically-erasable programmable read-only memory. The display control module  16  is configured to display the received display data on the display panel  18 . 
     The touch control module  22  includes an inter-integrated circuit interface (IIC Interface)  23 . The display signal transmission interface  12  includes a display data channel (DDC)  25 . The display signal transmission interface  12  may be a digital visual interface (DVI) or high definition multimedia interface (HDMI). The inter-integrated circuit interface  23  connects to the display data channel  25  through an inter-integrated circuit bus. The touch panel  20  is configured to receive and sense applied pressure on the touch panel  20  and the touch position of the applied pressure. The touched position includes the coordinate of the applied pressure. The touch panel  20  may be a capacitive touch panel or a resistive touch panel. The touch control module  22  is configured to generate a touch signal according to the touched position and transmit the touch signal to the host  30  through the display data channel  25 . 
     Referring to  FIG. 2 , a flowchart of a bidirectional data transmission method is presented in accordance with an example embodiment. The example method is provided by way of example, as there are a variety of ways to carry out the method. The method described below can be carried out using the configurations illustrated in  FIG. 1 , for example, and various elements of these figures are referenced in explaining example method. Each block shown in  FIG. 2  represents one or more processes, methods, or subroutines, carried out in the example method. Furthermore, the illustrated order of blocks is illustrative only and the order of the blocks can change. Additional blocks can be added or fewer blocks may be utilized, without departing from this disclosure. The example method can begin at block  102 . 
     At block  102 , the touch screen display  10  receives display data transmitted from the host  30  which is in communication with the touch screen display  10  through the display signal transmission interface  12  including the display data channel  25 . 
     The host  30  may be a computer or a personal digital assistant. The display signal transmission interface  12  may be a digital visual interface (DVI) or high definition multimedia interface (HDMI). 
     At block  104 , the storage module  14  stores the display data transmitted from the host  30 . The storage module  14  may be an electrically-erasable programmable read-only memory. 
     At block  106 , the display control module  16  displays the display data received by the touch screen display  10  on the display panel  18  of the touch screen display  10 . 
     At block  108 , the touch panel  20  of the touch screen panel  10  receives applied pressure on the touch panel  20  and senses applied pressure on the touch panel  20  and the touch position of the applied pressure. The touched position includes the coordinates of the applied pressure. The touch panel  20  may be a capacitive touch panel or a resistive touch panel. 
     At block  110 , the touch control module  22  generates a touch signal according to the touched position and transmit the touch signal to the host  30  through the display data channel  25  which is connected to the inter-integrated circuit interface  23  of the touch control module  22 , through an inter-integrated circuit bus. 
     The embodiments shown and described above are only examples. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the details, including in matters of shape, size, and arrangement of the parts within the principles of the present disclosure, up to and including the full extent established by the broad general meaning of the terms used in the claims.