Patent Publication Number: US-2015085203-A1

Title: Double-vision touch display device and manufacturing method thereof

Description:
TECHNICAL FIELD 
     Embodiments of the present invention relate to a double-vision touch display device and a manufacturing method thereof. 
     BACKGROUND 
     Double-vision displaying refers to displaying different images by the same one display at different angles, that is, a user can see different images on one display screen at different angles, and a double-vision display can be used as a vehicle display. For example, by using the double-vision display, passengers at different seats in a vehicle can see different images from one display respectively, thus it is not necessary to provide each passenger with a separate display, and the cost can be lowered and the space within the vehicle can be saved. 
     As shown in  FIG. 1 , a structure of a double-vision liquid crystal display comprises: an array substrate  11 ; a liquid crystal layer  12 ; a color filter substrate  13 ; an isolating layer  14 ; and a grating  15 . Compared with a structure of a non-double-vision liquid crystal display, the differences of this structure mainly lie in that the double-vision display effect can be generated through the grating  15  in the case of viewing the double-vision liquid crystal display in a first viewing region  16  and a second viewing region  17 , and a first view plane  19  and a second view plane  18  can be seen respectively, as the grating  15  uses opaque material, opaque parts thereof shields a part of an image, thus two different images can be obtained at two different angles. 
     Touch devices have been widely used in electronic devices. As shown in  FIG. 3 , a conventional touch device comprises: a first touch electrode  21  comprising a plurality of metal lines parallel to one another and a second touch electrode  22  comprising a plurality of metal lines parallel to one another, wherein each of the metal lines is connected with a touch control module through a leading wire, and the metal lines of the two touch electrodes cross with one other, for example, perpendicular to one another and are located in different layers. Herein, one touch electrode serves as a touch scanning electrode and the other touch electrode serves as a touch sensing electrode, the touch control module drives the metal lines of the touch scanning electrode in a scanning manner and measures whether a capacitance change occurs at a location of each of the metal lines crossing to the driven metal lines of the touch sensing electrode (that is, whether a distance change between the metal lines in the different layers due to touch occurs), through scanning one by one, an accurate touch position can be obtained, and multi-point touch can be achieved. 
     However, currently it is difficult to touch the double-vision display without adding manufacturing steps and affecting the display effect of the display. 
     SUMMARY 
     Embodiments of the present invention provide a double-vision touch display device and a manufacturing method thereof, which can achieve a touch function without affecting the display effect and adding any manufacturing process. 
     On the one hand, an embodiment of the present invention provides a double-vision touch display device, comprising: a touch circuit; a grating, wherein, the touch circuit comprises: first touch electrodes, second touch electrodes, and a touch control module, and the first touch electrodes cross with and are insulated from the second touch electrodes, and the first touch electrodes and the second touch electrodes are connected with the touch control module, respectively, and the grating is made from an opaque conductive material and formed with the first touch electrodes synchronously. 
     On the other hand, an embodiment of the present invention provides a manufacturing method of the above double-vision touch display device, comprising following step: forming the grating and the first touch electrodes through one patterning process. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to clearly illustrate the technical solution of the embodiments of the invention, the drawings of the embodiments will be briefly described in the following; it is obvious that the described drawings are only related to some embodiments of the invention and thus are not limitative of the invention. 
         FIG. 1  is a structure view of an existing double-vision liquid crystal display; 
         FIG. 2  is an arrangement schematic view of a black matrix in an existing liquid crystal display; 
         FIG. 3  is a schematic view of a first touch electrode and a second touch electrode of an existing touch liquid crystal display; 
         FIG. 4  is a schematic view of a first touch electrode and a second touch electrode in a double-vision touch display device according to a first embodiment of the present invention; 
         FIG. 5  is a schematic view showing a structure in which a grating is externally disposed in a double-vision touch display device according to the first embodiment of the present invention; 
         FIG. 6  is a schematic view showing a structure in which a grating is internally disposed in a double-vision touch display device according to the first embodiment of the present invention; 
         FIG. 7  is an arrangement schematic view of a black matrix in the double-vision touch display device according to the first embodiment of the present invention; 
         FIG. 8  is a switch control principle view of a touch signal of another double-vision touch display device according to a second embodiment of the present invention; and 
         FIG. 9  is a switch control principle view of a touch signal of another double-vision touch display device according to a second embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     In order to make objects, technical details and advantages of the embodiments of the invention apparent, the technical solutions of the embodiment will be described in a clearly and fully understandable way in connection with the drawings related to the embodiments of the invention. It is obvious that the described embodiments are just a part but not all of the embodiments of the invention. Based on the described embodiments herein, those skilled in the art can obtain other embodiment(s), without any inventive work, which should be within the scope of the invention. 
     To make one skilled in the art better understand the technical solutions of the present invention, the embodiments of the present invention will be detailed hereinafter in conjunction with the drawings and the specific embodiments. 
     A First Embodiment 
     The first embodiment provides a double-vision touch display device, comprising: a touch circuit; a grating  15 , wherein, the touch circuit comprises: a plurality of first touch electrodes  21 , a plurality of second touch electrodes  22 , and a touch control module; and the first touch electrodes  21  cross with the second touch electrodes  22 , and they are connected to the touch control module; the grating  15  is made from opaque conductive material and is formed with the first touch electrodes  21  synchronously (that is, the grating  15  is also used as the first touch electrodes  21 ). 
     The working process of the double-vision touch display device will be detailed hereinafter. 
     In combination with  FIG. 2 , through the opaque grating  15 , the double-vision touch display device can make a user see two different images at two different angles, that is, a double-vision effect is generated. As the opaque grating  15  has opaque stripes arranged with an interval therebetween, the images seen at two different angles are also different when light passes through the grating  15 . 
     The first touch electrodes  21  cross with the second touch electrodes  22 , and they are located in different layers and can form capacitors at crossing positions; wherein, one touch electrode serves as a touch scanning electrode and the other touch electrode serves as a touch sensing electrode, the touch control module drives each of the touch scanning electrodes in a scanning manner, and measures whether a capacitance change occurs at the touch sensing electrode crossing with the driven touch scanning electrode as the touch causes the change of distance between the upper layer electrodes and the lower layer electrodes, and through scanning one by one, an accurate touch position can be obtained, and multi-point touch can be achieved. 
     In this device, the grating  15  made from conductive material and the first touch electrodes  21  are formed by using one mask synchronously, that is, the grating  15  has actually the functions of the grating and the first touch electrodes at the same time (that is, it is both the grating  15  and the first touch electrodes  21 ), thus, the structure is simple, the manufacturing process is simplified, the manufacturing cost is saved, and the yield and reliably of the double-vision touch display device can be improved. 
     Exemplarily, as shown in  FIGS. 4 and 5 , the double-vision touch display device is a liquid crystal double-vision touch display device, and comprises a color filter substrate  13  which comprises a base  131  and a black matrix  132  disposed on the base, and the grating  15  is disposed at an outer side of the color filter substrate; or the grating  15  is disposed between the base  131  and the black matrix  132  of the color filter substrate  13 , and is isolated from the black matrix  132  through a transparent adjustment layer  51 . When the grating  15  is located at the outer side (that is, a side away from an array substrate  11  and a liquid crystal layer  12 ) of the color filter substrate  13 , if a distance between the black matrix  132  and the grating  15  is too small, the base  131  of the color filter substrate needs to be thinned, and an isolating layer  14  needs to be disposed; when the grating  15  is disposed between the base  131  and the black matrix  132  , the transparent adjustment layer  51  is disposed between the black matrix  132  and the grating  15 , the two situations both aim to keep a certain distance between the black matrix  132  and the grating  15 , thus the double-vision displaying can be ensured. 
     Exemplarily, the grating  15  is made of black metal material, and of course other opaque conductive materials may be also used. 
     Exemplarily, when the double-vision touch display device is a liquid crystal double-vision touch display device, the second touch electrodes  22  and the black matrix  132  of the color filter substrate  13  are formed synchronously, that is, the black matrix  132  also serves as the second touch electrodes  22 , (that is, it is both the black matrix  132  and the second touch electrodes  22 ), thus the process is further simplified, and the cost can be lowered. 
     Furthermore, the black matrix  132  is made of black metal material. 
     Exemplarily, as shown in  FIG. 6 , the black matrix  132  comprises a first black matrix  1321  serving as the second touch electrodes  22  and a second black matrix  1322  crossing to the first black matrix and being not connected to the first black matrix. As shown in  FIG. 2 , in the prior art the black matrix  132  is in a crossing arrangement manner, this will lead to a short circuit due to the crossing of the first black matrix  1321  in the black matrix  132  serving as the second touch electrodes  22  with each of the metal lines. In the arrangement manner in the embodiment of the present invention, the first black matrix  1321  serving as the second touch electrode  22  is made not to connect to the second black matrix  1322 , thus the short circuit due to the crossing arrangement of the first black matrix  1321  serving as the second touch electrodes  22  and the metal lines can be avoided. 
     Exemplarily, the first touch electrodes  21  serve as a touch sensing electrode, and the second touch electrodes  22  serve as a touch scanning electrode; or, the first touch electrodes  21  serve as the touch scanning electrode and the second touch electrodes  22  serve as the touch sensing electrode. The touch scanning electrode and the touch sensing electrode form a capacitive type touch mode. 
     Exemplarily, the first touch electrodes  21  are arranged perpendicular to the second touch electrodes  22 . 
     A Second Embodiment 
     The second embodiment provides a double-vision touch display device, compared with the structure of the display device according to the first embodiment, the differences of the display device according to the second embodiment lie in that it further comprises a signal control switching module connected with a touch control module for achieving a switch between controlling a first view plane  18  and controlling a second view plane  19 . 
     The working process of the double-vision touch display device will be detailed hereinafter. 
     The embodiment is the same with the first embodiment in the basic principle, while in the embodiment the signal control switching module is added, as shown in  FIG. 8 , a touch signal only controls one view plane at a certain time, for example, the first view plane  18 ; at this moment, if the touch signal is intended to control the second view plane  19 , the signal control switching module is needed to make the touch signal control the second view plane by using a switching signal, thus, the switch between the touch signal controlling the first view plane  18  and the touch signal controlling the second view plane  19  can be completed. The signal control switching module makes an overall touch system more complete, and avoids the mutual influence between the first view plane and the second view plane during switching a control signal. 
     Exemplarily, the signal control switching module comprises a camera unit for tracking eye and head, and a position judging unit or a switch button. As shown in  FIG. 9 , when the signal control switching module comprises the camera unit for tracking eye and head and the position judging unit, the camera unit is used to track a user&#39;s eye and head and the position judging unit is used to judge whether the user is positioned at the first view plane  18  or the second view plane  19 , and then the switching signal is output to achieve the switch between the touch signal controlling the first view plane  18  and the touch signal controlling the second view plane  19  according to the user&#39;s position. Exemplarily, the switching signal can be a high level or a low level, and is a high level when the user is positioned at the first view plane  18  and is a low level when the user is positioned at the second view plane  19 , and when the switching signal is changed from the high level to the low level or from the low level to the high level, the touch signal changes to control the second view plane  19  from the first view plane  18  or to control the first view plane  18  from the second view plane  19 , thus, switching a touch of the user between controlling two view planes can be intelligently and automatically performed by this manner. 
     Exemplarily, in the embodiment of the present invention, the signal control switching module can comprise a switch button, and the switching between the touch signal controlling two view planes can be achieved by a switching operation of a user. 
     A Third Embodiment 
     The third embodiment provides a manufacturing method of a double-vision touch display device according to the first embodiment and the second embodiment, compared with the prior art, in the method of the embodiment, the grating  15  and the first touch electrodes  21  are formed through one patterning process, and the process is simplified and can be achieved easily. 
     Exemplarily, the double-vision touch display device is a liquid crystal double-vision touch display device comprising a color filter substrate, and the black matrix and the second touch electrodes are formed through one patterning process. Thus, the process can be further simplified and the cost can be saved. 
     The embodiment of the invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to those skilled in the art are intended to be included within the scope of the following claims.