Patent Publication Number: US-2023165103-A1

Title: Stretchable display panel and manufacturing method therefor

Description:
PRIORITY INFORMATION 
     The present application claims the priority and the benefit of the patent application filed before the China National Intellectual Property Administration on July 21st, 2020 with the application number of 202010707450.X, which is incorporated herein in its entirety by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to the technical field of stretchable displaying and more particularly, to a stretchable display panel and a fabricating method thereof. 
     BACKGROUND 
     Stretchable displaying, as novel displaying devices, has an effect of displaying of a high stretchability and a high resolution. Stretchable displaying employs the connection mode of islands (the displaying units) and bridges (the connecting units), and hollowed-out regions are formed within the displaying region to provide the stretchability. Currently, it has not been found that any conventional stretchable component employs the structure of a color film on the luminescent base plate (COE). 
     SUMMARY 
     The present disclosure is made on the basis of the following finding of the inventor: 
     The inventor of the present disclosure has found by study that, in a method for fabricating a stretchable displaying component of a color film in a displaying base plate (COE), a hollowing-out process may be performed by using a color-film protecting layer (CF Cover) as the hard mask after the color-film layer (CF) is completed, which may effectively prevent the influence on the low-temperature polycrystalline-silicon (LTPS) thin-film-transistor (TFT) characteristic by the deposition of the columnar-supportor protecting layer (PS Cover), and the damaging on the anode by the etching of a second anode sublayer (AND2). 
     In the first aspect of the present disclosure, the present disclosure provides a method for fabricating a stretchable display panel. 
     According to an embodiment of the present disclosure, the method includes: 
     providing a substrate, wherein a displaying unit, a connecting unit and a hollowed-out region are provided on the substrate, and the hollowed-out region is provided between the displaying unit and the connecting unit;   forming film-layer components on the substrate, wherein orthographic projections of the film-layer components on the substrate are within the displaying unit, the connecting unit and the hollowed-out region;   forming a first planarization layer on a surface of the film-layer components that is away from the substrate;   forming a color-film layer on one side of the first planarization layer that is away from the substrate, wherein an orthographic projection of the color-film layer on the substrate is within the displaying unit;   forming a color-film protecting layer on one side of the color-film layer that is away from the substrate, wherein the color-film protecting layer covers the displaying unit and the connecting unit; and   performing an ashing process to the hollowed-out region not covered by the color-film protecting layer, to remove the first planarization layer and the film-layer components within the hollowed-out region.   

     By using the method for fabricating a stretchable display panel according to the embodiment of the present disclosure, not only the color-film layer may be fabricated on one side of the luminescent base plate, but also the color-film protecting layer is used as the hard mask to perform the ashing process to form the hollowed-out region, which may effectively prevent the influence on the low-temperature polycrystalline-silicon thin-film-transistor characteristic by the deposition of the columnar-supportor protecting layer, and the damaging on the anode by the etching. 
     Furthermore, the fabricating method according to the above embodiment of the present disclosure may also have the following additional technical features: 
     according to an embodiment of the present disclosure, the method further includes: forming a black-matrix layer between the color-film layer and the color-film protecting layer, wherein the black-matrix layer covers part of the color-film layer; and   stripping the substrate from the film-layer components, and adhering a back film to a surface of the film-layer components that is away from the color-film layer.   

     According to an embodiment of the present disclosure, the step of forming the film-layer components includes: 
     forming a flexible matrix, a flexible-matrix protecting layer, a thin-film-transistor component and a second planarization layer on the substrate, wherein the thin-film-transistor component is formed in the displaying unit;   forming a source-drain-electrode protecting layer on a surface of the thin-film-transistor component that is away from the substrate; and   forming an organic luminescent component and a columnar supporter on a surface of the thin-film-transistor component that is away from the substrate, wherein both of orthographic projections on the substrate of the organic luminescent component and the columnar supportor are within the displaying unit.   

     According to an embodiment of the present disclosure, the step of forming the organic luminescent component includes:
     forming a luminescent layer by vacuum evaporation of an opening mask, wherein the luminescent layer is formed by using a white-light organic luminescent material.   

     According to an embodiment of the present disclosure, the orthographic projection of the color-film layer on the substrate and an orthographic projection of the luminescent layer on the substrate overlap. 
     According to an embodiment of the present disclosure, the first planarization layer directly covers a surface of the columnar supportor that is away from the substrate. 
     According to an embodiment of the present disclosure, an anode of the organic-light-emitting-diode component is formed in one step. 
     In the second aspect of the present disclosure, the present disclosure provides a stretchable display panel. 
     According to an embodiment of the present disclosure, the stretchable display panel includes a displaying unit, a connecting unit and a hollowed-out region, the hollowed-out region is provided between the displaying unit and the connecting unit, and the stretchable display panel includes: 
     film-layer components, wherein the film-layer components are in the displaying unit and the connecting unit;   a first planarization layer, wherein the first planarization layer is provided on one side of the film-layer components, and an orthographic projection of the first planarization layer on the film-layer components are within the displaying unit and the connecting unit;   a color-film layer, wherein the color-film layer is provided on one side of the first planarization layer that is away from the film-layer components, and an orthographic projection of the color-film layer on the film-layer components is within the displaying unit; and   a color-film protecting layer, wherein the color-film protecting layer is provided on one side of the color-film layer that is away from the film-layer components, and covers the displaying unit and the connecting unit.   

     In the stretchable display panel according to the embodiment of the present disclosure, the hollowed-out region is formed by using an ashing process using the color-film protecting layer as the hard mask, which can result in a good low-temperature polycrystalline-silicon thin-film-transistor characteristic and little damaging on the anode, thereby resulting in a high fabrication yield of the stretchable display panel. In addition, the color-film layer may also be provided on one side of a luminescent base plate, to enable the display panel to have a lower thickness. 
     Furthermore, the stretchable display panel according to the above embodiment of the present disclosure may also have the following additional technical features: 
     according to an embodiment of the present disclosure, the stretchable display panel further includes:   a substrate, wherein the substrate is provided on a surface of the film-layer components that is away from the first planarization layer.   

     According to an embodiment of the present disclosure, the stretchable display panel further includes: 
     a back film, wherein the back film is adhered to a surface of the film-layer components that is away from the first planarization layer. 
     According to an embodiment of the present disclosure, the film-layer components include a flexible matrix, a flexible-matrix protecting layer, a thin-film-transistor component, a second planarization layer, a source-drain-electrode protecting layer, an organic luminescent component and a columnar supportor that are arranged in stack, orthographic projections of the flexible matrix, the flexible-matrix protecting layer and the second planarization layer on the film-layer components are within the displaying unit and the connecting unit, and orthographic projections of the thin-film-transistor component, the organic luminescent component and the columnar supportor on the film-layer components are within the displaying unit. 
     According to an embodiment of the present disclosure, a luminescent layer of the organic luminescent component is formed by using a white-light organic luminescent material, and an orthographic projection of the color-film layer on the film-layer components and an orthographic projection of the luminescent layer on the film-layer components overlap. 
     According to an embodiment of the present disclosure, the first planarization layer directly covers a surface of the columnar supportor that is away from the flexible matrix. 
     According to an embodiment of the present disclosure, an anode of the organic-light-emitting-diode component is formed by using an integral material. 
     Some of the additional aspects and advantages of the present disclosure will be given in the following description, and some will become apparent from the following description or be known from the implementation of the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above aspects of the present disclosure will be explained with reference to the following description on the drawings and the embodiments. In the drawings: 
         FIG.  1    is photographs of a normal anode (a) and a damaged anode (b) where the silver disappears; 
         FIG.  2    is a schematic flow chart of a method for fabricating a stretchable display panel according to an embodiment of the present disclosure; 
         FIG.  3    is a schematic cross-sectional structural diagram of the product of the step S 200  of a fabricating method according to an embodiment of the present disclosure; 
         FIG.  4    is a schematic cross-sectional structural diagram of the product of the step S 200  of a fabricating method according to another embodiment of the present disclosure; 
         FIG.  5    is a schematic cross-sectional structural diagram of the semi-finished product of the step S 200  of a fabricating method according to another embodiment of the present disclosure; 
         FIG.  6    is a schematic cross-sectional structural diagram of the semi-finished product of the step S 200  of a fabricating method according to another embodiment of the present disclosure; 
         FIG.  7    is a schematic cross-sectional structural diagram of the semi-finished product of the step S 200  of a fabricating method according to another embodiment of the present disclosure; 
         FIG.  8    is a schematic cross-sectional structural diagram of the semi-finished product of the step S 200  of a fabricating method according to another embodiment of the present disclosure; 
         FIG.  9    is a schematic cross-sectional structural diagram of the product of the step S 500  of a fabricating method according to an embodiment of the present disclosure; 
         FIG.  10    is a schematic cross-sectional structural diagram of the product of the step S 500  of a fabricating method according to another embodiment of the present disclosure; 
         FIG.  11    is a schematic cross-sectional structural diagram of the product of the step S 600  of a fabricating method according to an embodiment of the present disclosure; 
         FIG.  12    is a schematic cross-sectional structural diagram of the product of the step S 700  of a fabricating method according to an embodiment of the present disclosure; 
         FIG.  13    is a schematic cross-sectional structural diagram of a stretchable display panel according to an embodiment of the present disclosure; 
         FIG.  14    is a schematic cross-sectional structural diagram of a stretchable display panel according to another embodiment of the present disclosure; and 
         FIG.  15    is an electron-microscope photograph of a cross section of a third planarization layer after filled according to an embodiment of the present disclosure. 
     
    
    
     REFERENCE NUMBERS 
       100  substrate 
       200  film-layer components 
       210  flexible matrix 
       220  flexible-matrix protecting layer 
       2301  buffer layer 
       2302  active layer 
       2303  first grid insulating layer 
       2304  first grid 
       2305  second grid insulating layer 
       2306  second grid insulating layer 
       2307  interlayer dielectric layer 
       2308  source-drain electrode 
       241  second planarization layer 
       242  third planarization layer 
       250  source-drain-electrode protecting layer 
       251  slot 
       260  fourth planarization layer 
       2701  anode 
       2702  pixel definition layer 
       2703  luminescent layer 
       2704  cathode 
       280  columnar supportor 
       300  first planarization layer 
       400  color-film layer 
       500  color-film protecting layer 
       600  black-matrix layer 
       700  organic adhesive layer 
       800  back film 
     DETAILED DESCRIPTION 
     The embodiments of the present disclosure will be described in detail below. A person skilled in the art can understand that the following embodiments are intended to interpret the present disclosure, and should not be deemed as a limitation on the present disclosure. Unless indicated particularly, where the particular techniques or conditions of an embodiment in the following are not clearly described, a person skilled in the art may implement the embodiment by using commonly used techniques or conditions in the art or according to the specification of the product. 
     In an aspect of the present disclosure, the present disclosure provides a method for fabricating a stretchable display panel. According to an embodiment of the present disclosure, referring to  FIG.  2   , the fabricating method includes: 
     S 100 : providing a substrate. 
     In this step, the substrate  100  is provided, a displaying unit A, a connecting unit B and a hollowed-out region C are provided on the substrate  100 , and the hollowed-out region C is provided between the displaying unit A and the connecting unit B. 
     The inventor of the present disclosure has found by long-term study that the current red-blue-green (RBG) stretchable displaying components, as compared with the conventional fabricating processes of RBG organic light emitting diode (OLED) components, require being additionally added a source-drain-electrode protecting layer (SD Cover) and a PS Cover. However, after a hollowing-out process using a PS Cover as the hard mask (Hard Mask) is performed to form a hollowed-out region, it is further required to etch the AND2 on the surface of the PS Cover that is away from the first anode sublayer (AND1). However, an etching-atmosphere over-etching damages the indium tin oxide (ITO) in the AND 1, and the subsequent basic-etchant process further damages the silver (Ag) in the AND1, which easily results in displaying imperfects. Moreover, the additionally added SD Cover and PS Cover of a silicon-nitride material result in the problem of LTPS TFT characteristic drifting. 
     Additionally, the luminescent layers of the three colors in the RBG stretchable displaying components require to be vacuum evaporated individually by using Fine Metal Masks (FMM), and the hollowed-out parts of the FMM are not evenly distributed, which easily results in nonuniform deformation of the FMM during stowing net, thereby resulting in RGB color mixing of the displaying units. 
     In some embodiments of the present disclosure, the substrate  100  may include a plurality of displaying units A that are arranged in an array, and each of the displaying units A may be formed by a plurality of pixel units. Moreover, the substrate  100  may further include a plurality of connecting units B, and a connecting unit B is provided between each two neighboring displaying units A. Additionally, the hollowed-out region C is provided between each of the displaying units A and a connecting unit B. That may enable the finally fabricated stretchable display panel to have both of a stretchability and a displaying performance. 
     S 200 : forming film-layer components on the substrate. 
     In this step, referring to  FIG.  3   , film-layer components  200  are formed on the substrate  100 , and the orthographic projections of the film-layer components  200  on the substrate  100  are within the displaying unit A, the connecting unit B and the hollowed-out region C. 
     In some embodiments of the present disclosure, referring to  FIGS.  4 - 8   , the step S 200  may include: S 210  forming a flexible matrix  210 , a flexible-matrix protecting layer  220 , a thin-film-transistor component and a second planarization layer  241  on the substrate  100 , wherein the thin-film-transistor component is formed in the displaying unit A; S 220  forming a source-drain-electrode protecting layer  250  on the surface of the thin-film-transistor component that is away from the substrate  100 ; and S 230  forming an organic luminescent component and a columnar supportor  280  on the surface of the thin-film-transistor component that is away from the substrate  100 , wherein both of the orthographic projections on the substrate  100  of the organic luminescent component and the columnar supportor  280  are within the displaying unit A. Accordingly, a luminescent (EL) base plate of improved structure and functions may be fabricated. 
     In some particular embodiments, the material for forming the luminescent layer  2703  of the organic luminescent component may be merely selected to be a white-light organic luminescent material. Accordingly, the luminescent layer may be formed by merely using one-step vacuum evaporation of an opening mask (Open Mask), which, as compared with the design of RGB displaying, requires merely one time of the vacuum evaporation process, to obtain a lower vacuum evaporation cost and prevent the problem of color mixing of color-separation vacuum evaporation. 
     Particularly, the step of forming the thin-film-transistor component may include the following. Referring to  FIG.  4   , a buffer layer  2301 , an active layer  2302 , a first grid insulating layer  2303 , a first grid  2304 , a second grid insulating layer  2305 , a second grid insulating layer  2306  and an interlayer dielectric layer  2307  are formed sequentially on the surface of the flexible-matrix protecting layer  220  that is away from the substrate  100 . Referring to  FIG.  5   , subsequently, etching of the first time (EP1) is performed to remove the buffer layer  2301 , the first grid insulating layer  2303 , the second grid insulating layer  2305  and the interlayer dielectric layer  2307  in the area outside the displaying unit A. Subsequently, etching of the second time (EP2) is performed to remove the flexible-matrix protecting layer  220  within the hollowed-out region C. Referring to  FIG.  6   , subsequently, the area outside the displaying unit A is filled with an organic material to form a third planarization layer  242 , which may reduce offset. Referring to  FIG.  15   , the thickness of the third planarization layer  242  may be 1-2 micrometers. Subsequently, a via hole in the area of the active layer  2302  is formed. The via hole penetrates the first grid insulating layer  2303 , the second grid insulating layer  2305  and the interlayer dielectric layer  2307 , which may enable the formed source-drain electrode  2308  to contact the active layer  2302  via the via hole. Subsequently, the area outside the displaying unit A continues to be filled with an organic material to form a second passivation layer  241 , to coat the data lines (SD lines). Accordingly, because the third planarization layer  242  and the second passivation layer  241  sandwich the SD lines therebetween, the SD lines may be cushioned in stretching, thereby further increasing the stretchable amount of the display panel. Particularly, when the stretching amount is 5%, no crack emerges, and when the stretching amount reaches 10%, slightly cracks emerge. Referring to  FIG.  7   , the source-drain-electrode protecting layer  250  is deposited on the surface of the interlayer dielectric layer  2307  that is away from the substrate  100 , wherein merely the covered part of the source-drain electrode  2308  may provide a packaging cross section for the subsequent packaging, and prevent bad contact between the inorganic layer and the organic layer of the packaging. Subsequently, a slot (Dam)  251  is formed on the source-drain-electrode protecting layer  250 , which can increase the paths of oxygen water invasion and improve the packaging reliability, and can also increase the stability of the inversed-trapezoidal PS and prevent falling. 
     Particularly, referring to  FIG.  8   , the step of forming the organic luminescent component may include: forming a fourth planarization layer  260  on the surface of the source-drain electrode  2308  that is away from the substrate  100 , to provide a planarization interface for the anode; subsequently, forming the anode  2701  on the surface of the fourth planarization layer  260  that is away from the substrate  100 ; subsequently, forming a pixel definition layer  2702  on the surfaces of the anode  2701  and the fourth planarization layer  260  that are away from the substrate  100 ; subsequently, fabricating an inversed-trapezoidal columnar cushion (PS)  280  on the slot  251 , to form a blocking component; subsequently, forming the luminescent layer  2703  on the surfaces of the pixel definition layer  2702  and the anode  2701  that are away from the substrate  100 ; and finally, forming a cathode  2704  on the surface of the luminescent layer  2703  that is away from the substrate  100 . 
     The anode  2701  of the organic-light-emitting-diode component may be formed in one step. Accordingly, it is not required to subsequently fabricate a columnar-supportor protecting layer (PS Cover) as the hard mask for the formation of the hollowed-out region C, and therefore it is not required to fabricate a second anode sublayer (AND2), thereby effectively preventing damaging to the anode  2701  by AND2 etching, which results in a high fabrication yield of the stretchable display panel. 
     S 300 : forming a first planarization layer on a surface of the film-layer components that is away from the substrate. 
     In this step, a first planarization layer  300  is formed on the surface of the film-layer components  200  that is away from the substrate  100 . 
     In some embodiments of the present disclosure, referring to  FIG.  10   , the first planarization layer  300  may directly cover the surface of the columnar supportor  280  in the film-layer components  200  that is away from the substrate  100 . Accordingly, in the fabricating method, it is not required to additionally fabricate a PS Cover and an AND2 on the surface of the columnar supportor  280  that is away from the substrate  100 , and the hollowed-out region C can still be hollowed out by using the subsequently fabricated color-film protecting layer (CF Cover)  500  as the hard mask, thereby effectively preventing the LTPS TFT characteristic drifting caused by the PS Cover of a silicon-nitride material, which results in a high fabrication yield of the stretchable display panel. 
     S 400 : forming a color-film layer on one side of the first planarization layer that is away from the substrate. 
     In this step, a color-film layer  400  is formed on the side of the first planarization layer  300  that is away from the substrate, and the orthographic projection of the color-film layer  400  on the substrate  100  is within the displaying unit A. 
     In some embodiments of the present disclosure, the orthographic projection of the color-film layer  400  on the substrate  100  and the orthographic projection of the luminescent layer  2703  on the substrate  100  may overlap. Particularly, the orthographic projection of the color-film layer  400  on the substrate  100  may be within the orthographic projection of the luminescent layer  2703  on the substrate  100 . Accordingly, the white light emitted by the luminescent layer  2703  may be modulated by the color-film layer  400  of a red color, a blue color or a green color, and color lights are emitted from the stretchable display panel. 
     In some embodiments of the present disclosure, a black-matrix layer  600  may be formed on the surface of the color-film layer  400  that is away from the substrate  100 , and the black-matrix layer  600  between the color-film layer  400  and the color-film protecting layer  500  may cover part of the color-film layer  400 . Accordingly, not only the color-film layer  400  is fabricated on one side of the luminescent base plate, but also the black-matrix layer  600  for preventing light leakage is also fabricated on one side of the luminescent base plate, which can enable the stretchable display panel to have a better effect of displaying. 
     S 500 : forming a color-film protecting layer on one side of the color-film layer that is away from the substrate. 
     In this step, referring to  FIG.  9   , a color-film protecting layer  500  is formed on the side of the color-film layer  400  that is away from the substrate  100 , and the color-film protecting layer  500  merely covers the displaying unit A and the connecting unit B. accordingly, the hollowed-out region C is not covered by the color-film protecting layer  500 . According to an embodiment of the present disclosure, the material forming the color-film protecting layer  500  may be silicon nitride (SiN). Accordingly, the color-film protecting layer  500  using that material can better prevent atmosphere damaging on the color-film layer  300 , the black-matrix layer  400  and part of the film-layer components  200  by the subsequent ashing process. 
     S 600 : performing an ashing process to the hollowed-out region not covered by the color-film protecting layer, to remove the first planarization layer and the film-layer components within the hollowed-out region. 
     In this step, referring to  FIG.  11   , an ashing process is performed to the hollowed-out region C not covered by the color-film protecting layer  500 , to remove the first planarization layer  300  and the film-layer components  200  within the hollowed-out region C. Particularly, the ashing process may be performed by means of an oxygen plasma (O Plasma). Accordingly, by removing the organic material within the hollowed-out region C by using the high-energy plasma, the fabricated hollowed-out region C can have little residue and spend a short time. In some embodiments of the present disclosure, referring to  FIG.  12   , the ashing process may remove the first planarization layer  300 , the second planarization layer  241  and the third planarization layer  242  within the hollowed-out region C. Accordingly, the organic film layers formed by the organic material within the hollowed-out region C are thoroughly removed by the oxygen plasma. 
     In some embodiments of the present disclosure, after the step S 600 , the fabricating method may further include: 
     S 700 : stripping the substrate from the film-layer components, and adhering a back film to a surface of the film-layer components that is away from the color-film layer. 
     In this step, referring to  FIG.  13   , the substrate  100  is stripped from the film-layer components  200 , and subsequently, referring to  FIG.  14   , a back film  800  is adhered to the lower surface of the film-layer components  200  by using an organic adhesive layer  700 . Accordingly, the fabrication of the stretchable display panel can be completed. 
     In conclusion, according to the embodiments of the present disclosure, the present disclosure provides a method for fabricating a stretchable display panel, wherein not only the color-film layer can be fabricated on one side of the luminescent base plate, but also the color-film protecting layer is used as the hard mask to perform the ashing process to form the hollowed-out region, which can effectively prevent the influence on the low-temperature polycrystalline-silicon thin-film-transistor characteristic by the deposition of the columnar-supportor protecting layer, and the damaging on the anode by a basic etchant. 
     In another aspect of the present disclosure, the present disclosure provides a stretchable display panel. 
     According to an embodiment of the present disclosure, referring to  FIG.  13   , the stretchable display panel includes a displaying unit A, a connecting unit B and a hollowed-out region C, the hollowed-out region C is provided between the displaying unit A and the connecting unit B, and the stretchable display panel includes: film-layer components  200 , a first planarization layer  300 , a color-film layer  400  and a color-film protecting layer  500 . The film-layer components  200  are in the displaying unit A and the connecting unit B. The first planarization layer  300  is provided on one side of the film-layer components  200 , and the orthographic projection of the first planarization layer  300  on the film-layer components  200  are within the displaying unit A and the connecting unit B. The color-film layer  400  is provided on the side of the first planarization layer  300  that is away from the film-layer components  200 , and the orthographic projection of the color-film layer  400  on the film-layer components  200  is within the displaying unit A. The color-film protecting layer  500  is provided on the side of the color-film layer  400  that is away from the film-layer components  200 , and the color-film protecting layer  500  covers the displaying unit A and the connecting unit B. Accordingly, the hollowed-out region C of the stretchable display panel is formed by a hollowing-out process by using the color-film protecting layer  500  as the mask, and the color-film protecting layer  500  is completely the same as the sum of the shapes of the displaying unit A and the connecting unit B, which can effectively prevent the influence on the low-temperature polycrystalline-silicon thin-film-transistor characteristic by the deposition of the columnar-supportor protecting layer, and the damaging on the anode by the etching. 
     In some embodiments of the present disclosure, the stretchable display panel may include a plurality of displaying units A that are arranged in an array, and each of the displaying units A may be formed by a plurality of pixel units. Moreover, the stretchable display panel may further include a plurality of connecting units B, and a connecting unit B is provided between each two neighboring displaying units A. Additionally, the hollowed-out region C is provided between each of the displaying units A and a connecting unit B. That can enable the stretchable display panel to have both of a stretchability and a displaying performance. 
     In some embodiments of the present disclosure, referring to  FIG.  11   , the stretchable display panel may further include a substrate  100 , and the substrate  100  is provided on the surface of the film-layer components  200  that is away from the first planarization layer  300 . Accordingly, in the fabrication of the stretchable display panel, the hard substrate  100  can provide good supporting and smoothness for the fabrication. 
     In some other embodiments of the present disclosure, referring to  FIG.  14   , the stretchable display panel may further include a back film  800 , and the back film  800  is adhered to the surface of the film-layer components  200  that is away from the first planarization layer  300  by using an organic adhesive layer  700 . Accordingly, the stretching-resistance performance of the display panel can be better. 
     According to an embodiment of the present disclosure, referring to  FIG.  14   , the film-layer components  200  may include a flexible matrix  210 , a flexible-matrix protecting layer  220 , a thin-film-transistor component, a second planarization layer  240 , a source-drain-electrode protecting layer  250 , an organic luminescent component and a columnar supporter  280  that are arranged in stack, the orthographic projections of the flexible matrix  210 , the flexible-matrix protecting layer  220  and the second planarization layer  240  on the film-layer components  200  are within the displaying unit A and the connecting unit B, and the orthographic projections of the thin-film-transistor component, the organic luminescent component and the columnar supporter  280  on the film-layer components  200  are within the displaying unit A. 
     In some embodiments of the present disclosure, a luminescent layer  2703  of the organic luminescent component may be formed by using a white-light organic luminescent material, and the orthographic projection of the color-film layer  400  on the film-layer components  200  and the orthographic projection of the luminescent layer  2703  on the film-layer components  200  overlap. Particularly, the orthographic projection of the color-film layer  400  on the substrate  100  may be within the orthographic projection of the luminescent layer  2703  on the substrate  100 . Accordingly, it is not required to fabricate a columnar-supportor protecting layer (PS Cover) as the hard mask for the formation of the hollowed-out region C, and therefore it is not required to fabricate a second anode sublayer (AND2), thereby effectively preventing damaging to the anode  2701  by AND2 etching, which results in a high fabrication yield of the stretchable display panel. In addition, the white light emitted by the luminescent layer  2703  may be modulated by the color-film layer  400  of a red color, a blue color or a green color, and color lights are emitted from the stretchable display panel. 
     In some embodiments of the present disclosure, referring to  FIG.  14   , the first planarization layer  300  may directly cover the surface of the columnar supporter  200  in the film-layer components  200  that is away from the flexible matrix  210 . Accordingly, it is not required to additionally fabricate a columnar-supportor protecting layer (PS Cover) and a second anode sublayer (AND2) on the surface of the columnar supporter  280  that is away from the substrate  100 , and the hollowed-out region C can still be hollowed out by using the subsequently fabricated color-film protecting layer (CF Cover)  500  as the hard mask, thereby effectively preventing the LTPS TFT characteristic drifting caused by the PS Cover of a silicon-nitride material, which results in a high fabrication yield of the stretchable display panel. 
     In some embodiments of the present disclosure, the anode  2701  of the organic-light-emitting-diode component may be formed by using an integral material. Accordingly, it is not required to fabricate a PS Cover as the hard mask for the formation of the hollowed-out region C, and therefore it is not required to fabricate an AND2, thereby effectively preventing damaging to the anode  2701  by AND2 etching, which results in a high fabrication yield of the stretchable display panel. 
     In conclusion, according to the embodiments of the present disclosure, the present disclosure provides a stretchable display panel, wherein the hollowed-out region is formed by using an ashing process using the color-film protecting layer as the hard mask, which can result in a good low-temperature polycrystalline-silicon thin-film-transistor characteristic and little damaging on the anode, thereby resulting in a high fabrication yield of the stretchable display panel. In addition, the color-film layer may also be provided on one side of a luminescent base plate, to enable the display panel to have a lower thickness. 
     In the description of the present disclosure, it should be understood that the terms “first”, “second”, “third” and “fourth” are merely for the purpose of describing, and should not be construed as indicating or implying the degrees of importance or implicitly indicating the quantity of the specified technical features. Accordingly, the features defined by “first”, “second”, “third” and “fourth” may explicitly or implicitly comprise at least one of the features. In the description of the present disclosure, the meaning of “plurality of” is “at least two”, for example, two, three and so on, unless explicitly and particularly defined otherwise. 
     In the description of the present disclosure, the description referring to the terms “an embodiment”, “some embodiments”, “example”, “particular example” or “some examples” and so on means that particular features, structures, materials or characteristics described with reference to the embodiment or example are comprised in at least one of the embodiments or examples of the present disclosure. In the description, the illustrative expressions of the above terms do not necessarily relate to the same embodiment or example. Furthermore, the described particular features, structures, materials or characteristics may be combined in one or more embodiments or examples in a suitable form. Moreover, subject to avoiding contradiction, a person skilled in the art may combine different embodiments or examples described in the description and the features of the different embodiments or examples. 
     Although the embodiments of the present disclosure have already been illustrated and described above, it can be understood that the above embodiments are illustrative, and should not be construed as a limitation on the present disclosure, and a person skilled in the art may make variations, modifications, substitutions and improvements to the above embodiments within the scope of the present disclosure.