Patent Publication Number: US-2019189970-A1

Title: Display panel, display apparatus and manufacturing method thereof

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application is a 35 U.S.C. § 371 National Phase conversion of International (PCT) patent application No. PCT/CN2018/071694, filed on Jan. 8, 2018, which claims foreign priority of Chinese patent application No.201711372344.5, filed on Dec. 14, 2017 in the State Intellectual Property Office of China, the contents of all of which are hereby incorporated by reference. 
    
    
     TECHNICAL FIELD 
     The present disclosure generally relates to the display field, and in particular to a display panel, a display apparatus and a manufacturing method thereof. 
     BACKGROUND 
     A touch screen is direct and efficient human-machine interface device which largely improves the efficiency and the convenience of the human-machine communication. Among various touch control technologies, capacitive touch control is widely used because a touch screen using this technology is light and thin. 
     The touch screen is usually manufactured individually and then attached on the surface of a display panel with optical transparent glue so as to form the complete touch control display apparatus. Since the individually-manufactured touch screen is thick, when attached on the display panel it may increase the thickness of the display apparatus. Thus, this kind of display apparatus cannot be very light, thin and flexible. 
     SUMMARY 
     The present disclosure provides a display panel, a display apparatus and a manufacturing method thereof to solve the above-mentioned problem. 
     To solve the above-mentioned problem, a technical scheme adopted by the present disclosure is to provide a display panel, including: a display screen; a circular polarizer, located at a light exit side of the display screen; a touch control electrode layer, located between the display screen and the circular polarizer, inside the circular polarizer or at a light exit side of the circular polarizer. 
     To solve the above-mentioned problem, another technical scheme adopted by the present disclosure is to provide a manufacturing method for a display panel, including: forming a touch control electrode layer on a display screen, and forming a circular polarizer on the touch control electrode layer; or forming a circular polarizer on a display screen, wherein the circular polarizer comprises a touch control electrode layer; or forming a circular polarizer on a display screen, and forming a touch control electrode layer on the circular polarizer. 
     To solve the above-mentioned problem, another technical scheme adopted by the present disclosure is to provide a display apparatus including the above-mentioned display panel. 
     According to the present disclosure, the touch control electrode layer is set at one of two sides of the circular polarizer or inside the circular polarizer, such that the touch screen does not have to be manufactured individually, and the total thickness of the display panel may be reduced. Therefore, the present disclosure may contribute to the improvement of the flexibility of the display panel. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       To describe the technical solutions in the embodiments of the present disclosure more clearly, the accompanying drawings required for describing the embodiments will now be briefly introduce as follows. Apparently, the accompanying drawings in the following description show merely some embodiments of the present disclosure. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative efforts. 
         FIG. 1  is a schematic diagram of a display panel according to an embodiment of the present disclosure. 
         FIG. 2  is a schematic diagram of a display panel according to an embodiment of the present disclosure. 
         FIG. 3  is a schematic diagram of a display panel according to an embodiment of the present disclosure. 
         FIG. 4  is a schematic diagram of a conducting bridge according to an embodiment of the present disclosure. 
         FIG. 5  is a schematic diagram of a display panel according to another embodiment of the present disclosure. 
         FIG. 6  is a schematic diagram of a display panel according to another embodiment of the present disclosure. 
         FIG. 7  is a schematic diagram of a display panel according to another embodiment of the present disclosure. 
         FIG. 8  is a schematic diagram of a display panel according to an embodiment of the present disclosure. 
         FIG. 9  is a flow chart of a manufacturing method for a display panel according to an embodiment of the present disclosure. 
         FIG. 10  is a schematic diagram of a display apparatus according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The disclosure will now be described in detail with reference to the accompanying drawings and examples. Apparently, the embodiments described below are only a part but not all of the embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present invention. 
     Referring to  FIG. 1 , the display panel according to an embodiment of the present disclosure may include: 
     a display screen  10 , wherein the display screen  10  may be an OLED (organic light-emitting diode) screen; 
     a circular polarizer  20 , located at the light exit side of the display screen  10 ; 
     a touch control electrode layer  30 , located at the light exit side of the circular polarizer  20 . 
     Referring to  FIGS. 1-4 , the display panel may further include a third glue layer  50  and a protection cap  60  for protecting the display panel. 
     In this embodiment, the circular polarizer  20  may be attached with the display screen  10  by a first glue layer  40 . The circular polarizer  20  may include: 
     a phase compensation film layer  201  located at a side of the first glue layer  40  far away from the display screen  10 , wherein the phase compensation film layer  201  may be a ¼λ, phase compensation film; 
     a second glue layer  202  located at a side of the phase compensation film layer  201  far away from the first glue layer  40 , wherein, the first glue layer  40  and the second glue layer  202  may both include the OCA (optical clear adhesive); 
     a linear polarizer  203  located at a side of the second glue layer  202  far away from the phase compensation film layer  201 . 
     In one embodiment, the linear polarizer  203  may include TAC (triacetyl cellulose) and PVA (polyvinyl alcohol). The thickness of the TAC may be 0-40 μm. The thickness of the PVA may be 0-20 μm. 
     In this embodiment, the touch control electrode layer  30  may be located at a side of the linear polarizer  203  far away from the second glue layer  202 . 
     The touch control electrode layer  30  may include: 
     a conducting bridge  301  located at a side of the linear polarizer  203  far away from the second glue layer  202 , wherein the conducting bridge  301  may include titanium, aluminum or other metal; 
     an insulating layer  302  covering the conducting bridge  301 , wherein the insulating layer  302  defines two via holes  3021  located corresponding to the two electrodes of the conducting bridge  30 , optionally the insulating layer  302  may include materials such as silicon nitride; 
     at least two touch-driving electrodes  303  located at a side of the insulating layer  302  far away from the conducting bridge  301 , and connected to the conducting bridge  301  through the via holes  3021 ; 
     a touch-sensing electrode  304  located at a same layer as the touch-driving electrodes  303 , wherein a gap is defined between the touch-sensing electrode  304  and the touch-driving electrodes  303  such that an induced capacitor is formed between the touch-sensing electrode  304  and the touch-driving electrodes  303 . 
     In one embodiment, the touch-driving electrodes  303  and the touch-sensing electrode  304  may have a metal mesh configuration. The mesh lines may be located corresponding to the non-light emitting area of the display screen  10  while the mesh openings may be located corresponding to the pixel light emitting area  101  of the display screen  10 . 
     In one embodiment, the width of the touch-driving electrode  303  and the touch-sensing electrode  304  may be less than or equal to 3 μm. The distance between adjacent pixel light emitting areas  101  may be 18 to 20 μm. 
     In one embodiment, the touch-driving electrode  303  and the touch-sensing electrode  304  may include titanium, aluminum or other metal. 
     According to the present disclosure, the touch control electrode layer may be set at a sides of the circular polarizer, such that the touch screen does not have to be manufactured individually, and the total thickness of the display panel may be reduced. Therefore, the present disclosure may contribute to the improvement of the flexibility of the display panel. 
     Referring to  FIGS. 5 and 6 , according to another embodiment of the present disclosure, the display panel may include the above-mentioned display screen  10 , the circular polarizer  20  and the touch control electrode  30 . However, in this embodiment, the touch control electrode layer  30  may be located inside the circular polarizer  20 , that is to say, between the phase compensation film layer  201  and the second glue layer  202 . 
     In one embodiment, the touch-driving electrodes  303  and the touch-sensing electrode  304  may have a metal mesh configuration. The mesh lines may be located corresponding to the non-light emitting area of the display screen  10  while the mesh openings may be located corresponding to the pixel light emitting area  101  of the display screen  10 . 
     According to the present disclosure, the touch control electrode layer may be set inside the circular polarizer, such that the touch screen does not have to be manufactured individually, and the total thickness of the display panel may be reduced. Therefore, the present disclosure may contribute to the improvement of the flexibility of the display panel. 
     Referring to  FIGS. 7 and 8 , the display panel according to another embodiment of the present disclosure may include the above-mentioned display screen  10 , the circular polarizer  20  and the touch control electrode  30 . However, in this embodiment, the touch control electrode layer  30  may be located between the display screen  10  and the circular polarizer  20 , that is to say, between the first glue layer  40  and the phase compensation film layer  201 . 
     In one embodiment, the touch-driving electrodes  303  and the touch-sensing electrode  304  may have a metal mesh configuration. The mesh lines may be located corresponding to the non-light emitting area of the display screen  10  while the mesh openings may be located corresponding to the pixel light emitting area  101  of the display screen  10 . 
     According to the present disclosure, the touch control electrode layer may be set at a side of the circular polarizer, such that the touch screen does not have to be manufactured individually, and the total thickness of the display panel may be reduced. Therefore, the present disclosure may contribute to the improvement of the flexibility of the display panel. 
     Referring to  FIG. 9 , the manufacturing method according to an embodiment of the present disclosure may include: 
     forming a touch control electrode layer on a display screen, and forming a circular polarizer on the touch control electrode layer; or 
     forming a circular polarizer on a display screen, wherein the circular polarizer comprises a touch control electrode layer; or 
     forming a circular polarizer on a display screen, and forming a touch control electrode layer on the circular polarizer. 
     Specifically, S 101 : Forming a first glue layer on the display screen. 
     S 102 : Forming a phase compensation film layer on the first glue layer. 
     S 103 : Forming a second glue layer on the phase compensation film layer. 
     S 104 : Forming a linear polarizer on the second glue layer. 
     S 201 : Forming a conducting bridge at a side of the linear polarizer far away from the second glue layer, or at one of two sides of the phase compensation film layer by depositing a thin metal film layer via a first mask. 
     S 202 : Depositing an insulating layer on the conducting bridge and forming via holes corresponding to two electrodes of the conducting bridge by applying a second mask. 
     S 203 : Forming at least two touch-driving electrodes and a touch-sensing electrode by depositing a thin metal film layer on the insulating layer via a third mask, wherein the at least two touch-driving electrodes are connected to the conducting bridge through the via holes, a gap is defined between the touch-sensing electrode and the touch-driving electrodes such that an induced capacitor is formed between the touch-sensing electrode and the touch-driving electrodes. 
     Optionally, PVD (physical vapor deposition) or CVD (chemical vapor deposition) may be applied for depositing the thin metal film layer or the insulating layer. Masks may be employed during the exposure, develop and etch process to form the conducting bridge, the via holes or the touch control electrodes. 
     In this embodiment, a protection cap may be formed on the touch control electrode layer for protecting the display panel. 
     According to the present disclosure, the touch control electrode layer may be set at a side of the circular polarizer, such that the touch screen does not have to be manufactured individually, and the total thickness of the display panel may be reduced. Therefore, the present disclosure may contribute to the improvement of the flexibility of the display panel. 
     Referring to  FIG. 10 , the display apparatus  70  according to an embodiment of the present disclosure may include the above-mentioned display panel  701 . 
     The display panel  701  of the display apparatus  70  as set forth will not be described hereon. 
     According to the present disclosure, the touch control electrode layer may be set at a side of the circular polarizer, such that the touch screen does not have to be manufactured individually, and the total thickness of the display panel may be reduced. Therefore, the present disclosure may contribute to the improvement of the flexibility of the display panel. 
     The foregoing is merely embodiments of the present disclosure, and is not intended to limit the scope of the disclosure. Any transformation of equivalent structure or equivalent process which uses the specification and the accompanying drawings of the present disclosure, or directly or indirectly application in other related technical fields, are likewise included within the scope of the protection of the present disclosure.