Abstract:
The embodiments of the present invention provide a display panel, a method for manufacturing the display panel, a display device, and a method for manufacturing the display device, relating to the technical field of display, thereby solving the problem that the anti-reflection effect of AR film is poor, since attaching an AR film can only achieve a zero reflection within a narrow wavelength range. The method for manufacturing a display panel comprises forming a black matrix on a first surface of a base substrate, and defining a plurality of display units with the criss-cross black matrix; forming a photoresist on a second surface of the base substrate; performing a curing process for the photoresist corresponding to the position of the display units; removing the photoresist corresponding to the position of the black matrix; and performing a texturing process for a portion of the second surface of the base substrate corresponding to the position of the black matrix.

Description:
RELATED APPLICATIONS 
       [0001]    The present application claims the benefit of Chinese Patent Application No. 201410599115.7, filed Oct. 30, 2014, the entire disclosure of which is incorporated herein by reference. 
       FIELD OF THE INVENTION 
       [0002]    The present invention relates to the technical field of display, in particular to a display panel, a method for manufacturing the display panel, a display device, and a method for manufacturing the display device. 
       BACKGROUND OF THE INVENTION 
       [0003]    TFT-LCD (Thin Film Transistor Liquid Crystal Display) is a flat panel display, and is applied in high performance display fields increasingly because of its characteristics such as small volume, low power consumption, no radiation and the relatively low production cost. 
         [0004]    As shown in  FIG. 1 a   , a TFT-LCD consists of an array substrate  10  and a color film substrate  10 ′. A liquid crystal layer  12  is arranged between the array substrate  10  and the color film substrate  10 ′. In addition, the upper surface of the color film substrate  10 ′ is provided with a polarizer  13 . The intensity of the light can be controlled by controlling the orientation of the liquid crystal molecules in the liquid crystal layer  12 , with the filter function of the color film substrate  10 ′, color image display can be realized. 
         [0005]    In order to eliminate the influence of the external light source on the display effect, in the existing manufacturing process of TFT-LCD, generally an AR (Anti-Reflective) film  16  is attached on a surface of the polarizer  13 . The refractive index of the material of the AR film  14  is different with that of the material of the polarizer  13 . In such a manner, for light incident to the AR film from a same point, a coherent addition will be performed for two reflected light beams, one of these reflected light beams being reflected at the interface between air and the AR film  14 , the other being reflected at the interface between the AR film  14  and the surface of the polarizer  13 , resulting in a destructive interference, thereby reducing the reflection. 
         [0006]    However, the thickness of the AR film is related to the wavelength of the light that can be eliminated by the AR film. For example, when the thickness of the AR film is close to a quarter of the red light wavelength in the AR film, the AR film can then eliminate the reflected light of the incident light with a wavelength near red light wavelength. Therefore, the AR film can only achieve a zero reflection within a narrow wavelength range, and can not eliminate all the reflected light with wavelength of the visible light. Hence it reduces the effect of anti reflection. If, in addition, in order to improve the anti reflection effect, a plurality of AR films with different thicknesses are arranged on the polarizer  13 , although they can effectively reduce the influence of visible light reflection on the display effect, meanwhile they will increase the thickness of the display, which is adverse to the ultrathin design of the display. 
       SUMMARY OF THE INVENTION 
       [0007]    The embodiments of the present invention provide a display panel, a method for manufacturing the display panel, a display device, and a method for manufacturing the display device, thereby solving the problem that attaching an AR film can only achieve a zero reflection within a narrow wavelength range. 
         [0008]    To this end, an embodiment of the present invention provides the following solutions. 
         [0009]    An aspect of the present invention provides a method for manufacturing a display panel, wherein the method comprises forming a black matrix on a first surface of a base substrate, and defining a plurality of display units with the criss-cross black matrix, wherein the method further comprises: 
         [0010]    forming a photoresist on a second surface of the base substrate; wherein the first surface is arranged opposite to the second surface; 
         [0011]    performing a curing process for the photoresist corresponding to the position of the display units; 
         [0012]    removing the photoresist corresponding to the position of the black matrix; and performing a texturing process for a portion of the second surface of the base substrate corresponding to the position of the black matrix. 
         [0013]    Optionally, performing a curing process for the photoresist corresponding to the position of the display units comprises: 
         [0014]    providing a mask plate on the surface of the photoresist, a transparent area of the mask plate being corresponding to the position of the display units, and an opaque area of the mask plate being corresponding to the position of the black matrix; 
         [0015]    exposing the photoresist such that the photoresist corresponding to the transparent area of the mask plate is cured. 
         [0016]    Optionally, performing a curing process for the photoresist corresponding to the position of the display units comprises: 
         [0017]    employing the black matrix as a mask plate; exposing the photoresist from a side of the first surface of the base substrate, such that the photoresist corresponding to the position of the display units is cured. 
         [0018]    Optionally, performing a texturing process for a portion of the second surface of the base substrate corresponding to the position of the black matrix comprises: 
         [0019]    after removing the photoresist corresponding to the position of the black matrix, spraying an etching solution on the second surface of the base substrate, and etching the area of the second surface that is not covered by the photoresist. 
         [0020]    Optionally, the etching solution is added with bubbles. 
         [0021]    Optionally, the etching solution comprises hydrofluoric acid solution if the base substrate is a glass substrate. 
         [0022]    Optionally, after the step of performing a texturing process for a portion of the second surface of the base substrate corresponding to the position of the black matrix, further comprises: 
         [0023]    peeling off the photoresist corresponding to the position of the display units. 
         [0024]    Another aspect of the present invention provides a display substrate, wherein the display substrate comprises a base substrate, a black matrix on a first surface of the base substrate, and a plurality of display units defined with the criss-cross black matrix; wherein 
         [0025]    a portion of a second surface of the base substrate corresponding to the position of the black matrix is coarse; wherein the first surface is arranged opposite to the second surface. 
         [0026]    Another aspect of the present invention provides a display device, wherein the display device comprises the display substrate mentioned above. 
         [0027]    Still another aspect of the present invention provides a method for manufacturing a display device, the method comprises forming a display panel; the display panel comprises a base substrate, a black matrix on a first surface of the base substrate, and a plurality of display units defined with the criss-cross black matrix, wherein the method further comprises: 
         [0028]    forming a photoresist on a second surface of the base substrate; wherein the first surface is arranged opposite to the second surface; 
         [0029]    performing a curing process for the photoresist corresponding to the position of the display units; 
         [0030]    removing the photoresist corresponding to the position of the black matrix; and 
         [0031]    performing a texturing process for a portion of the second surface of the base substrate corresponding to the position of the black matrix. 
         [0032]    Optionally, performing a curing process for the photoresist corresponding to the position of the display units comprises: 
         [0033]    providing a mask plate on the surface of the photoresist, a transparent area of the mask plate being corresponding to the position of the display units, and an opaque area of the mask plate being corresponding to the position of the black matrix; 
         [0034]    exposing the photoresist such that the photoresist corresponding to the transparent area of the mask plate is cured. 
         [0035]    Optionally, performing a curing process for the photoresist corresponding to the position of the display units comprises: 
         [0036]    employing the black matrix as a mask plate; exposing the photoresist from a side of the first surface of the base substrate, such that the photoresist corresponding to the position of the display units is cured. 
         [0037]    Optionally, performing a texturing process for a portion of the second surface of the base substrate corresponding to the position of the black matrix comprises: 
         [0038]    after removing the photoresist corresponding to the position of the black matrix, spraying an etching solution on the second surface of the base substrate, and etching the area of the second surface that is not covered by the photoresist. 
         [0039]    Optionally, after the step of performing a texturing process for a portion of the second surface of the base substrate corresponding to the position of the black matrix, further comprises: peeling off the photoresist corresponding to the position of the display units. 
         [0040]    The embodiments of the present invention provide a display panel, a method for manufacturing the display panel, a display device, and a method for manufacturing the display device. The method for manufacturing a display panel comprises: firstly, forming a black matrix on a first surface of a base substrate, and defining a plurality of display units with the criss-cross black matrix; then forming a photoresist on a second surface of the base substrate, wherein the first surface is arranged opposite to the second surface; since the display area of the display panel corresponds to the position of the display units, then performing a curing process for the photoresist corresponding to the position of the display units, such that the portion of the base substrate corresponding to the position of the display units can be protected; then removing the photoresist corresponding to the position of the black matrix, such that the portion of the second surface of the base substrate corresponding to the position of the black matrix is not covered by the photoresist; then, performing a texturing process for a portion of the second surface of the base substrate corresponding to the position of the black matrix, such that this portion is coarse. In such a manner, when visible light is incident to the non display area of the display panel corresponding to the black matrix, diffuse reflection will occur for all visible light incident to the non display area due to the coarse surface, which can eliminate the reflected light in the non display area. Although etching process is not performed for the portion of the base substrate corresponding to the position of the display area, the reflected light in the display area has little influence on the display effect, since the intensity of the light emitted from the display area (for display) is far greater than the intensity of the reflected light. Therefore, on the premise of ensuring the normal display of the display panel, the embodiment provided by the present invention eliminates the reflected light of all the visible light incident to the non display area, without increasing the thickness of the display panel, thereby improving the image quality and product quality. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0041]    In the following, the technical solutions in embodiments of the invention will be described clearly and completely in connection with the drawings in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, and not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by those of ordinary skills in the art under the premise of not paying out creative work pertain to the protection scope of the invention. 
           [0042]      FIG. 1A  is a structural schematic diagram of a display panel in the prior art; 
           [0043]      FIG. 1B  is a schematic diagram of overlooking structure of an array substrate in the prior art; 
           [0044]      FIG. 1C  is a schematic diagram of overlooking structure of a display substrate in the prior art; 
           [0045]      FIG. 2  is a flow chart of a method for manufacturing a display panel provided by an embodiment of the present invention; 
           [0046]      FIG. 3A - FIG. 3D  are schematic diagrams of every stages in a method of manufacturing a display panel provided by an embodiment of the present invention; 
           [0047]      FIG. 4  is a flow chart of another method for manufacturing a display panel provided by an embodiment of the present invention; 
           [0048]      FIG. 5A - FIG. 5B  are schematic diagrams of every stages in another method of manufacturing a display panel provided by an embodiment of the present invention; 
           [0049]      FIG. 6  is a schematic diagram of a method for manufacturing a display panel provided by an embodiment of the present invention; 
           [0050]      FIG. 7  is a flow chart of a method for manufacturing a display panel provided by an embodiment of the present invention; 
           [0051]      FIG. 8A - FIG. 8D  are schematic diagrams of every stages in a method of manufacturing a display device provided by an embodiment of the present invention; 
           [0052]      FIG. 9  is a flow chart of another method for manufacturing a display device provided by an embodiment of the present invention; 
           [0053]      FIG. 10  is a schematic diagram of a method for manufacturing a display device provided by an embodiment of the present invention; and 
           [0054]      FIG. 11  is a schematic diagram of another method for manufacturing a display device provided by an embodiment of the present invention. 
       
    
    
     REFERENCE SIGNS 
       [0055]      10 —array substrate;  10 ′—color film substrate;  11 —display substrate;  100 —sub-pixel;  101 —pixel electrode;  110 —base substrate; A—first surface of the base substrate; B—second surface of the base substrate;  111 —black matrix;  112 —display unit;  12 —liquid crystal layer;  13 —polarizer;  14 —AR film;  20 —photoresist;  21 —mask plate; C—transparent area of the mask plate; D—opaque area of the mask plate;  22 —etching solution. 
       DETAILED DESCRIPTION OF THE INVENTION 
       [0056]    The embodiments of the present invention provide a direct type backlight module and a display device to reduce the light mixing distance on the premise of obtaining a homogeneous illumination, thereby reducing the thickness of the direct type backlight module and the thickness of the entire display device. 
         [0057]    An embodiment of the present invention provides a method for manufacturing a display panel, wherein the method comprises forming a black matrix  111  on a first surface A of a base substrate  110 , and defining a plurality of display units  112  with the criss-cross black matrix  111 , as shown in  FIG. 2 , wherein the method can further comprise: 
         [0058]    S 101 , as shown in  FIG. 3 a   , forming a photoresist  20  on a second surface B of the base substrate  110 ; wherein the first surface A is arranged opposite to the second surface B. 
         [0059]    S 102 , as shown in  FIG. 3 b   , performing a curing process for the photoresist  20  corresponding to the position of the display units  112 , such that the photoresist  20  at this position is cured. 
         [0060]    S 103 , removing the photoresist  20  corresponding to the position of the black matrix  111 . 
         [0061]    S 104 , as shown in  FIG. 3 c   , performing a texturing process for a portion of the second surface B of the base substrate  110  corresponding to the position of the black matrix  111 , such that the portion of the second surface B not covered by the photoresist is coarse. 
         [0062]    The method for manufacturing a display panel comprises: firstly, forming a black matrix on a first surface of a base substrate, and defining a plurality of display units with the criss-cross black matrix; then forming a photoresist on a second surface of the base substrate, wherein the first surface is arranged opposite to the second surface; since the display area of the display panel corresponds to the position of the display units, then performing a curing process for the photoresist corresponding to the position of the display units, such that the portion of the base substrate corresponding to the position of the display units can be protected; then removing the photoresist corresponding to the position of the black matrix, such that the portion of the second surface of the base substrate corresponding to the position of the black matrix is not covered by the photoresist; then, performing a texturing process for a portion of the second surface of the base substrate corresponding to the position of the black matrix, such that this portion is coarse. In such a manner, when visible light is incident to the non display area of the display panel corresponding to the black matrix, diffuse reflection will occur for all visible light incident to the non display area due to the coarse surface, which can eliminate the reflected light in the non display area. Although etching process is not performed for the portion of the base substrate corresponding to the position of the display area, the reflected light in the display area has little influence on the display effect, since the intensity of the light emitted from the display area (for display) is far greater than the intensity of the reflected light. Therefore, on the premise of ensuring the normal display of the display panel, the embodiment provided by the present invention eliminates the reflected light of all the visible light incident to the non display area, without increasing the thickness of the display panel, thereby improving the image quality and product quality. 
         [0063]    It should be noted that, firstly, the display substrate can be a color film substrate  10 ′ provided with a black matrix  111  and a color film, the display substrate can also be an array substrate  10  provided with a black matrix  111  and a color film. The display substrate is not limited herein. 
         [0064]    Secondly, a plurality of sub pixels  100  are defined by a plurality of criss-cross gate lines Gate and date data lines Data in the array substrate  10  (of which a top view is shown in  FIG. 1 b   ). A pixel electrode  101  is provided in each sub-pixel  100 . 
         [0065]    The display substrate, such as the color film substrate (of which a top view is shown in  FIG. 1 c   ), comprises the black matrix  111  and a plurality of display units  112  defined with the criss-cross black matrix  111 ; a color film is provided in the display unit  112 , of which the color can be red (R), green (G) or blue (B). 
         [0066]    Wherein the display units  112  are one-to-one correspond to the pixel electrodes  101  in sub-pixel  100  of the array substrate shown in Fig. lb. A plurality of pixel units are formed after box aligning is performed for the display substrate and the array substrate, each pixel unit comprising sub-pixels  100  of three different colors: red (R), green (G), and blue (B). 
         [0067]    In addition, the non display area in the sub-pixel  100  other than the pixel electrode  101  corresponds to the position of the black matrix  111  on the display substrate, such that the black matrix  111  can shield the control circuit (such as a TFT area), preventing light exposure to the control circuit, and avoiding damage to the circuit. 
         [0068]    Thirdly, the base substrate  110  can be made of glass or quartz. 
         [0069]    Fourthly, the texturing process refers to performing a roughening process to the surface of the base substrate  110  corresponding to the non display area, such that the surface is coarse, resulting in inconsistent directions for the visible light incident to the non display area after being reflected (i.e., inducing diffuse reflection), thereby eliminating the influence of the reflected light effect on the display effect. The texturing process can use sand blasting, polishing process, or solution etching process. Since solution etching process is simple for operation, the damage to the display panel being small, it is preferable for the present invention. The following embodiments are described with using etching solution  22  for the texturing process. 
         [0070]    In particular, as shown in  FIG. 5 a   - FIG. 5 b   , the solution etching process can be, with a high pressure gas, spraying an etching solution  22  on the second surface B of the base substrate  110 , etching a portion of the second surface B not covered by the photoresist  20  (i.e., the portion of the second surface B corresponding to the position of the black matrix). 
         [0071]    Optionally, the etching solution can be added with bubbles, such that the etching solution  22  sprayed on the second surface B of the base substrate  110  has an inhomogeneous distribution, forming a coarse surface. In this way, it is avoided that a smooth etched surface is formed due to a homogeneous coverage of the etching solution  22  on the second surface B, which reduces the effect of diffuse reflection. In particular, the bubbles can be formed by adding dry air, hydrogen or nitrogen into the etching solution  22   
         [0072]    Fifthly, after the texturing process, the display substrate can be washed to avoid the erosion of the base substrate  110  due to the residual etching solution  22 . 
         [0073]    Sixthly, the curing process can be achieved with high temperature, high pressure curing process, exposure or development process. For exposure or development process, when a photoresist curable in an exposure condition (positive photoresist) is used, the above mentioned curing process can be an exposure process. Therefore, if the photoresist  20  formed on the second surface B of the base substrate  110  is a positive photoresist, an exposure process can be performed to the photoresist  20  corresponding to the position of the display units  112 , such that the photoresist  20  at this position is cured. A development process can be performed to the photoresist  20  corresponding to the position of the black matrix  111 , such that the photoresist  20  not cured at this position can be removed. 
         [0074]    In addition, when a photoresist curable in a development condition (negative photoresist) is used, the above mentioned curing process can be a development process. Therefore, if the photoresist  20  formed on the second surface B of the base substrate  110  is a negative photoresist, a development process can be performed to the photoresist  20  corresponding to the position of the display units  112 , such that the photoresist  20  at this position is cured. An exposure process can be performed to the photoresist  20  corresponding to the position of the black matrix  111 , such that the photoresist  20  not cured at this position can be removed. 
         [0075]    The curing process is not limited herein, though the following embodiments are described with using a positive photoresist as the photoresist  20 . 
         [0076]    In the following, the method for manufacturing the display substrate is described in detail. 
       Embodiment 1 
       [0077]    S 201 , after the above mentioned step S 101 , as shown in  FIG. 4  and  FIG. 5 a   , providing a mask plate  21  on the surface of the photoresist  20 , a transparent area C of the mask plate  21  being corresponding to the position of the display units  112 , and an opaque area D of the mask plate  21  being corresponding to the position of the black matrix  111 . 
         [0078]    S 202 , exposing the photoresist  20  such that the photoresist  20  corresponding to the transparent area C of the mask plate  21  is cured, therefore the portion of the surface of the base substrate  110  corresponding to the display area is protected from being roughened by the texturing process. 
         [0079]    S 203 , if the base substrate  110  is a glass substrate, dry air can be filled into the hydrofluoric acid solution to form an etching solution with bubbles. Moreover, as shown in  FIG. 5 b   , the etching solution  22  can be sprayed on the second surface B of the base substrate  110  with a high pressure gas, forming a coarse surface as shown in  FIG. 3   d.    
         [0080]    S 204 , as shown in  FIG. 3 d   , peeling off the photoresist  20  corresponding to the position of the display units  112 . 
         [0081]    It should be noted that if the photoresist  20  is white and transparent, it will not affect the display, so the step S 204  can also be omitted. If the photoresist  20  is not white or transparent, or in order to reduce the thickness of the display device, the step S 204  can be carried out, peeling off the photoresist  20 . 
       Embodiment 2 
       [0082]    After the above mentioned step  5101 , as shown in  FIG. 6 , employing the black matrix  111  as a mask plate; exposing the photoresist  20  from a side of the first surface A of the base substrate  110 , such that the photoresist  20  corresponding to the position of the display units  112  is cured, therefore the portion of the surface of the base substrate  110  corresponding to the display area is protected from being roughened by the texturing process. 
         [0083]    Then, the step S 203  and S 204 , or the step S 104  can be carried out. 
         [0084]    Compared with the embodiment 1, the embodiment 2 uses the opaque characteristic of the black matrix  111 , exposuring in a different direction, omitting the step of providing the mask plate  21 . 
         [0085]    An embodiment of the present invention provides a display substrate, as shown in  FIG. 3 d   , wherein the display substrate comprises a base substrate  110 , a black matrix  111  on a first surface A of the base substrate  110 , and a plurality of display units  112  defined with the criss-cross black matrix  111 . A portion of a second surface B of the base substrate  110  corresponding to the position of the black matrix  111  is coarse; wherein the first surface A is arranged opposite to the second surface B. In such a manner, when visible light is incident to the non display area of the display panel corresponding to the black matrix, diffuse reflection will occur for all visible light incident to the non display area due to the coarse surface, which can eliminate the reflected light in the non display area. Although etching process is not performed for the portion of the base substrate corresponding to the position of the display area, the reflected light in the display area has little influence on the display effect, since the intensity of the light emitted from the display area (for display) is far greater than the intensity of the reflected light. Therefore, on the premise of ensuring the normal display of the display panel, the embodiment provided by the present invention eliminates the reflected light of all the visible light incident to the non display area, without increasing the thickness of the display panel, thereby improving the image quality and product quality. 
         [0086]    An embodiment of the present invention provides a display device, wherein the display device comprises the display substrate  11  mentioned above. The display substrate has the same advantages as the display substrate  11  provided by the above mentioned embodiments. Since the structures and the beneficial effects have been described in detail in the aforementioned embodiments, they will not be repeated here. 
         [0087]    It should be noted that in the embodiments of the present invention, the display device can comprise liquid crystal display device; for example, the display device can be any product or component with display function, such as liquid crystal display, liquid crystal TV, digital photo frame, mobile phone, tablet computer and so on. 
         [0088]    An embodiment of the present invention provides a method for manufacturing a display device, the method comprises forming a display panel  11 ; the display panel  11  comprises a base substrate  110 , a black matrix  111  on a first surface A of the base substrate  110 , and a plurality of display units  112  defined with the criss-cross black matrix  111 , as shown in  FIG. 7 , the method can further comprise (wherein the following embodiment is described with the display substrate  10  being a color film substrate  10 ′): 
         [0089]    S 301 , as show in  FIG. 8 a   , forming a photoresist  20  on a second surface B of the base substrate  110 ; wherein the first surface A is arranged opposite to the second surface B. 
         [0090]    S 302 , as show in  FIG. 8 b   , performing a curing process for the photoresist  20  corresponding to the position of the display units  112 , such that the photoresist  20  at this position is cured. 
         [0091]    S 303 , removing the photoresist  20  corresponding to the position of the black matrix  111 . 
         [0092]    S 304 , as show in  FIG. 8 c   , performing a texturing process for a portion of the second surface B of the base substrate  110  corresponding to the position of the black matrix  111 , such that the portion of the second surface B of the base substrate  110  not covered by the photoresist is coarse. 
         [0093]    The method for manufacturing a display device comprises: firstly, forming a display substrate; the display substrate comprising a base substrate, a black matrix on a first surface of the base substrate, and a plurality of display units defined with the criss-cross black matrix; then forming a photoresist on a second surface of the base substrate, wherein the first surface is arranged opposite to the second surface; since the display area of the display panel corresponds to the position of the display units, then performing a curing process for the photoresist corresponding to the position of the display units, such that the portion of the base substrate corresponding to the position of the display units can be protected; then removing the photoresist corresponding to the position of the black matrix, such that the portion of the second surface of the base substrate corresponding to the position of the black matrix is not covered by the photoresist; then, performing a texturing process for a portion of the second surface of the base substrate corresponding to the position of the black matrix, such that this portion is coarse. In such a manner, when visible light is incident to the non display area of the display panel corresponding to the black matrix, diffuse reflection will occur for all visible light incident to the non display area due to the coarse surface, which can eliminate the reflected light in the non display area. Although etching process is not performed for the portion of the base substrate corresponding to the position of the display area, the reflected light in the display area has little influence on the display effect, since the intensity of the light emitted from the display area (for display) is far greater than the intensity of the reflected light. Therefore, on the premise of ensuring the normal display of the display panel, the embodiment provided by the present invention eliminates the reflected light of all the visible light incident to the non display area, without increasing the thickness of the display panel, thereby improving the image quality and product quality. 
         [0094]    In the following, the method for manufacturing the display device is described in detail. 
       Embodiment 3 
       [0095]    S 401 , after the above mentioned step  5301 , as shown in  FIG. 9  and  FIG. 10 , providing a mask plate  21  on the surface of the photoresist  20 , a transparent area C of the mask plate  21  being corresponding to the position of the display units  112 , and an opaque area D of the mask plate  21  being corresponding to the position of the black matrix  111 . 
         [0096]    S 402 , exposing the photoresist  20  such that the photoresist  20  corresponding to the transparent area C of the mask plate  21  is cured, therefore the portion of the surface of the base substrate  110  corresponding to the display area is protected from being roughened by the texturing process. 
         [0097]    S 403 , if the base substrate  110  is a glass substrate, dry air can be filled into the hydrofluoric acid solution to form an etching solution with bubbles. Moreover, as shown in  FIG. 5 b   , the etching solution  22  can be sprayed on a surface of the base substrate  110  departing from the array substrate  10  (i.e., the second surface B) with a high pressure gas, forming a coarse surface as shown in  FIG. 8   d.    
         [0098]    S 404 , as shown in  FIG. 8 d   , peeling off the photoresist  20  corresponding to the position of the display units  112 . 
       Embodiment 4 
       [0099]    After the above mentioned step S 301 , as shown in  FIG. 11 , employing the black matrix  111  as a mask plate; exposing the photoresist  20  from a side of the first surface A of the base substrate  110 , such that the photoresist  20  corresponding to the position of the display units  112  is cured, therefore the portion of the surface of the base substrate  110  corresponding to the display area is protected from being roughened by the texturing process. 
         [0100]    Then, the step S 403  and S 404 , or the step S 304  can be carried out. 
         [0101]    Compared with the embodiment  3 , the embodiment  4  uses the opaque characteristic of the black matrix  111 , exposuring in a different direction, omitting the step of providing the mask plate  21 . Moreover, the embodiment  4  can be performed after box aligning is performed for the array substrate  10  and the color film substrate  10 ′. In such a manner, bad vacuum adsorption can be avoided when the color film substrate  10 ′ is grasped by a manipulator with vacuum adsorption method during box aligning, which may occur due to the coarse surface of a portion on the side of the color film substrate  10 ′ departing from the array substrate  10  (i.e., the position corresponding to the position of the black matrix  111 ). 
         [0102]    The above embodiments are only used for explanations rather than limitations to the present invention, the ordinary skilled person in the related technical field, in the case of not departing from the spirit and scope of the present invention, may also make various modifications and variations, therefore, all the equivalent solutions also belong to the scope of the present invention, the patent protection scope of the present invention should be defined by the claims.