Patent Publication Number: US-2023165044-A1

Title: Display screen and display device

Description:
BACKGROUND 
     Field of Invention 
     The present disclosure relates to a field of display technology, and more particularly, to a display screen, and a display device. 
     Description of the Prior Art 
     In an existing display screen  1 , as shown in  FIG.  1   , a black shielding layer  12  is disposed between a cover plate  11  and a display panel  13  to shield internal circuits. Further, a glue layer  14  is also disposed between the cover plate  11  and the display panel  13  to bond the cover plate  11  and the display panel  13 , preventing external water and oxygen from corroding internal components of the display screen  1 . 
     Wherein, constituent material of the glue layer  14  is ultraviolet (UV) glue. The UV glue is cured under an irradiation of light emitted by a UV lamp  15 . As shown in  FIG.  1   , the UV lamp  15  is disposed on a side of the cover plate  11 . In order to prevent the black shielding layer  12  from blocking the light emitted by the UV lamp  15 , the black shielding layer  12  is disposed avoiding a position opposite to the UV lamp  15 , which causes a light-shielding effect to decrease. 
     Therefore, it is necessary to provide a display screen that can improve the light-shielding effect. 
     SUMMARY 
     A purpose of the present disclosure is to provide a display screen and a display device, improving a light-shielding effect of the screen. . 
     The present disclosure provides a display screen, including:
         a display panel;   a bonding layer disposed on the display panel;   a shielding layer disposed on the bonding layer; and   a cover plate disposed on the shielding layer;   wherein the shielding layer or the bonding layer includes a photosensitive material, and a light transmittance of the photosensitive material becomes less than a threshold under ultraviolet light.       

     In an embodiment, the photosensitive material includes silver halide. 
     In an embodiment, a mass ratio of the photosensitive material in the shielding layer is between 10% and 50% when the shielding layer includes the photosensitive material. 
     In an embodiment, when the shielding layer includes the photosensitive material, the shielding layer includes:
         a photosensitive area disposed opposite to the bonding layer, wherein a constituent material of the photosensitive area includes the photosensitive material; and   a shielding area disposed on two sides of the photosensitive area, wherein a constituent material of the shielding area includes a light-shielding material.       

     In an embodiment, wherein when the bonding layer includes the photosensitive material, the bonding layer includes:
         a doped area, wherein a constituent material of the doped area includes a glue and the photosensitive material.       

     In an embodiment, wherein when the bonding layer includes the photosensitive material, the shielding layer includes:
         a first shielding portion;   second shielding portion; and   an opening area disposed between the first shielding portion and the second shielding portion, wherein the bonding layer further includes: a non-doped area;
 
wherein the doped area of the bonding layer is disposed opposite to the opening area, and the non-doped area is disposed opposite to both the first shielding portion and the second shielding portion.
       

     In an embodiment, when the bonding layer includes the photosensitive material, the shielding layer includes the opening area; and the bonding layer includes a glue layer and a photosensitive layer overlapped, wherein the photosensitive layer is disposed opposite to the opening area. 
     In an embodiment, wherein the photosensitive layer is disposed on the display panel, and the glue layer is disposed between the photosensitive layer and the shielding layer; or
         wherein the glue layer is disposed on the display panel, and the photosensitive layer is disposed between the glue layer and the shielding layer.       

     In an embodiment, a thickness of the photosensitive layer ranges from 0.02 mm to 0.2 mm. 
     In an embodiment, a constituent material of the shielding layer includes black ink. 
     The present disclosure provides a display device, including a display screen, wherein the display screen includes:
         a display panel;   a bonding layer disposed on the display panel;   a shielding layer disposed on the bonding layer; and   a cover plate disposed on the shielding layer;   wherein the shielding layer or the bonding layer includes a photosensitive material, and a light transmittance of the photosensitive material becomes less than a threshold under ultraviolet light.       

     In an embodiment, the photosensitive material includes silver halide. 
     In an embodiment, a mass ratio of the photosensitive material in the shielding layer is between 10% and 50% when the shielding layer includes the photosensitive material. 
     In an embodiment, when the shielding layer includes the photosensitive material, the shielding layer includes:
         a photosensitive area disposed opposite to the bonding layer, wherein a constituent material of the photosensitive area includes the photosensitive material; and   a shielding area disposed on two sides of the photosensitive area, wherein a constituent material of the shielding area includes a light-shielding material.       

     In an embodiment, wherein when the bonding layer includes the photosensitive material, the bonding layer includes:
         a doped area, wherein a constituent material of the doped area includes a glue and the photosensitive material.       

     In an embodiment, wherein when the bonding layer includes the photosensitive material, the shielding layer includes:
         a first shielding portion;   a second shielding portion; and   an opening area disposed between the first shielding portion and the second shielding portion, wherein the bonding layer further includes a non-doped area;
 
wherein the doped area of the bonding layer is disposed opposite to the opening area, and the non-doped area is disposed opposite to both the first shielding portion and the second shielding portion.
       

     In an embodiment, wherein when the bonding layer includes the photosensitive material, the shielding layer includes the opening area; and the bonding layer includes a glue layer and a photosensitive layer overlapped, and the photosensitive layer is disposed opposite to the opening area. 
     In an embodiment, wherein the photosensitive layer is disposed on the display panel, and the glue layer is disposed between the photosensitive layer and the shielding layer; or
         wherein the glue layer is disposed on the display panel, and the photosensitive layer is disposed between the glue layer and the shielding layer.       

     In an embodiment, a thickness of the photosensitive layer ranges from 0.02 mm to 0.2 mm. 
     In an embodiment, a constituent material of the shielding layer includes black ink. 
     In the display screen and the display device of the embodiment of the present disclosure, the photosensitive material is disposed in the shielding material or the bonding layer, and the light transmittance of the photosensitive material becomes less than the threshold under the ultraviolet light to improve the light-shielding effect of the screen. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       Technical solutions and other beneficial effects of the present disclosure will be obvious by describing the specific implementation of the present disclosure in detail with reference to the accompanying drawings. 
         FIG.  1    is structural schematic diagram of an existing display screen. 
         FIG.  2    is a first structural schematic diagram of a display screen according to an embodiment of the present disclosure. 
         FIG.  3    is a first scenario schematic diagram of curing a bonding layer according to an embodiment of the present disclosure. 
         FIG.  4    is a second structural schematic diagram of the display screen according to an embodiment of the present disclosure. 
         FIG.  5    is a second scenario schematic diagram of curing the bonding layer according to an embodiment of the present disclosure. 
         FIG.  6    is a third structural schematic diagram of the display screen according to an embodiment of the present disclosure. 
         FIG.  7    is a fourth structural schematic diagram of the display screen according to an embodiment of the present disclosure. 
         FIG.  8    is a third scenario schematic diagram of curing the bonding layer according to an embodiment of the present disclosure. 
         FIG.  9    is a fourth scenario schematic diagram of curing the bonding layer according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     Embodiments of the present disclosure are described in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows. It is clear that the described embodiments are part of embodiments of the present disclosure, but not all embodiments. Based on the embodiments of the present disclosure, all other embodiments to those of ordinary skill in the premise of no creative efforts obtained, should be considered within the scope of protection of the present disclosure. 
     In the description of the present disclosure, it should be understood that orientations or position relationships indicated by the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, and “counter-clockwise” are based on orientations or position relationships illustrated in the drawings. The terms are used to facilitate and simplify the description of the present disclosure, rather than indicate or imply that the devices or elements referred to herein are required to have specific orientations or be constructed or operate in the specific orientations. Accordingly, the terms should not be construed as limiting the present disclosure. In addition, the term “first”, “second” are for illustrative purposes only and are not to be construed as indicating or imposing a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature that limited by “first”, “second” may expressly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of “plural” is two or more, unless otherwise specifically defined. 
     In the description of the present disclosure, it should be noted that unless otherwise clearly defined and limited, the terms “mounted”, “connected/coupled”, and “connection” should be interpreted broadly. For example, the terms may refer to a fixed connection, a detachable connection, or an integral connection; the terms may also refer to a mechanical connection, an electrical connection, or communication with each other; the terms may further refer to a direct connection, an indirect connection through an intermediary, or an interconnection between two elements or interactive relationship between two elements. Those skilled in the art can understand the specific meanings of the above-mentioned terms in the present disclosure according to circumstances. 
     In the present disclosure, it should he noted that unless otherwise clearly defined and limited, a first feature “on” or “under” a second feature may mean that the first feature directly contacts the second feature, or that the first feature contacts the second feature via an additional feature there between instead of directly contacting the second feature. Moreover, the first feature “on”, “above”, and “over” the second feature may mean that the first feature is right over or obliquely upward over the second feature or mean that the first feature has a horizontal height higher than that of the second feature. The first feature “under”, “below”, and “beneath” the second feature may mean that the first feature is right beneath or obliquely downward beneath the second feature or mean that that horizontal height of the first feature is lower than that of the second feature. 
     The following description provides various embodiments or examples for implementing various structures of the present disclosure. To simplify the description of the present disclosure, parts and settings of specific examples are described as follows. Certainly; they are only illustrative, and are not intended to limit the present disclosure. Further, reference numerals and reference letters may be repeated in different examples. This repetition is for purposes of simplicity and clarity and does not indicate a relationship of the various embodiments and/or the settings. Furthermore, the present disclosure provides specific examples of various processes and materials, however, applications of other processes and/or other materials may be appreciated those skilled in the art. 
     The present disclosure provides a display device. The display device includes a display screen. Please refer to  FIG.  2   ,  FIG.  2    is a structural schematic diagram of the display screen according to an embodiment of the present disclosure. As shown in  FIG.  2   , a display screen  2  includes a display panel  21 , a bonding layer  22 , a shielding layer  23 , and a cover plate  24 . Wherein the bonding layer  22  is disposed on the display panel  21 . The shielding layer  23  is disposed on the bonding layer  22 . The cover plate  24  is disposed on the shielding layer  23 . 
     The display panel  21  can be a liquid crystal display panel or an organic light-emitting panel, which is not specifically limited herein. The cover plate  24  covers the display panel  21 . The cover plate  24  can be made of high-hardness materials such as glass, sapphire, or ceramics, and has a good wear-resisting property to protect internal components in the display panel  21 . 
     In order to prevent components in the display panel  21  from being exposed on an appearance surface, the shielding layer  23  is disposed on a side of the cover plate  24  close to the display panel  21 . Wherein, the shielding layer  23  can be made of a light-shielding material, specifically, such as a material with a light transmittance less than 10%. Specifically, a constituent material of the shielding layer  23  can include black ink. 
     The bonding layer  22  is disposed between the shielding layer  23  and the display panel  21 . Wherein, a constituent material of the bonding layer  22  includes UV glue. The UV glue is cured under an irradiation of ultraviolet light to fix the display panel  21  and the cover plate  24 . 
     Wherein, the shielding layer  23  or the bonding layer  22  includes a photosensitive material, and a light transmittance of the photosensitive material becomes less than a threshold under ultraviolet light. Wherein, the photosensitive material includes silver halide such as silver bromide, silver iodide and the like. For example, the silver iodide is a yellowish solid. When adopting the ultraviolet light to cure the bonding layer  22 , the ultraviolet light can irradiate on the UV glue by passing through the silver iodide in the shielding layer  23  or directly irradiate on the UV glue in the bonding layer  22 . With an end of curing the UV glue, the silver iodide is further broken down and turned black under the irradiation of the ultraviolet light, so that the light transmittance of the shielding layer  23  or the bonding layer  22  is reduced to shield the internal components in the display panel  21 . In summary, the shielding layer  23  or the bonding layer  22  including the photosensitive material not only can ensure the UV glue to be cured under sufficient ultraviolet light, but also improves a light-shielding effect of the display screen  2 . 
     According to an embodiment, when the shielding layer  23  includes the photosensitive material, a mass ratio of the photosensitive material in the shielding layer  23  is between 10% and 50%. 
     When the shielding layer  23  includes the photosensitive material, as shown in  FIG.  2   , the shielding layer  23  includes: a photosensitive area  231  and a shielding area  232 . Wherein, a constituent material of the photosensitive area  231  includes the photosensitive material. The shielding area  232  is disposed on two sides of the photosensitive area  231 , and a constituent material of the shielding area  232  includes the light-shielding material. Wherein, the photosensitive area  231  is disposed opposite to the bonding layer  22 . 
     As shown in  FIG.  3   , when the UV lamp  3  emits the ultraviolet light to the bonding layer  22  from a side close to the cover plate  24 , the ultraviolet light can pass through the photosensitive material in the photosensitive area  231  and irradiate the bonding layer  22  to make the UV glue in the bonding layer  22  cured. With an end of a curing process of the bonding layer  22 , the light transmittance of the photosensitive material in the photosensitive area  231  becomes less than a threshold under the ultraviolet light, and the photosensitive area  231  and the shielding area  232  together realize a function of shielding the components in the display panel  21 . 
     When the bonding layer  22  includes the photosensitive material, the shielding layer  23  includes a first shielding portion  233 , a second shielding portion  234 , and an opening area  235  disposed between the first shielding portion  233  and the second shielding portion  234 . 
     In an embodiment, the bonding layer  22  includes a doped area  221 . A constituent material of the doped area  221  includes a glue and the photosensitive material. Wherein, a doping ratio of the photosensitive material in the doped region  221  is between 10% and 50%. 
     It should be noted that, in an embodiment, the photosensitive material can be doped in an entire bonding layer. That is, the bonding layer  22  only includes the doped area  221 . In another embodiment, as shown in  FIG.  4   , the bonding layer  22  further includes a non-doped area  222 . Wherein, a constituent material of the non-doped area  222  includes the glue and does not include the photosensitive material, improving a bonding performance of the bonding layer  22 . 
     Wherein, the doped area  221  of the bonding layer  22  is disposed opposite to the opening area  235 , and opposite to the first shielding portion  233 . As shown in  FIG.  5   , when the UV lamp  3  emits the ultraviolet light to the bonding layer  22  from the side close to the cover plate  24 , the UV glue in the bonding layer  22  becomes cured. With the end of the curing process of the bonding layer  22 , the light transmittance of the photosensitive material in the doped area  221  becomes less than a threshold under the ultraviolet light. The doped area  221 , the second shielding portion  234 , and the first shielding portion  233  together realize the function of shielding the components in the display panel  21 . 
     When the bonding layer  22  includes the photosensitive material, the bonding layer  22  includes a glue layer  224  and a photosensitive layer  223  stacked. The photosensitive layer  223  is disposed opposite to the opening area  235 . In an embodiment, as shown in  FIG.  6   , the photosensitive layer  223  is disposed on the display panel  21 , and the glue layer  224  is disposed between the photosensitive layer  223  and the shielding layer  23 . In another embodiment, as shown in  FIG.  7   , the glue layer  224  is disposed on the display panel  21 , and the photosensitive layer  223  is disposed between the glue layer  224  and the shielding layer  23 . Wherein, a thickness of the photosensitive layer  223  ranges from 0.02 mm to 0.2 mm. 
     As shown in  FIG.  8    or  FIG.  9   , when the UV lamp  3  emits the ultraviolet light to the bonding layer  22  from the side close to the cover plate  24 , the UV glue in the glue layer  224  becomes cured. With an end of the curing process of the glue layer  224 , the light transmittance of the photosensitive material in the photosensitive layer  223  becomes less than a threshold under the ultraviolet light. The photosensitive layer  223 , the second shielding portion  234 , and the first shielding portion  233  together realize the function of shielding the components in the display panel  21 . 
     In the display screen and the display device of the embodiment of the present disclosure, the photosensitive material is disposed in the shielding material or the bonding layer, and the light transmittance of the photosensitive material becomes less than the threshold under the ultraviolet light to improve the light-shielding effect of the screen. 
     In the foregoing embodiments, the description of each embodiment has its own emphasis. For the parts that are not described in detail in one embodiment, reference may be made to related descriptions in other embodiments. 
     The display screen and the display device provided by the embodiments of the present disclosure are described in detail. The principles and implementations of the present disclosure are described in combination with specific embodiments. The above description of the embodiments is merely for the purpose of understanding the disclosure. In the meantime, for those skilled in the art, there will be changes in the specific implementation and application scope according to the idea of the present disclosure. In conclusion, the content of the specification of the present disclosure should not be construed as limitations of the scope of the present disclosure.