Patent Publication Number: US-2021181572-A1

Title: Display apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the priority benefit of China application serial no. 201911295506.9, filed on Dec. 16, 2019. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification. 
     BACKGROUND 
     Technical Field 
     The disclosure relates to a display apparatus. 
     Description of Related Art 
     With the vigorous development of electronic products, the display technology applied to the electronic products has also been continuously improved. Display apparatuses are constantly improving towards better display effects. With the vigorous development of such display apparatuses, consumers have high expectations for the quality, function, or reliability of these products. Nevertheless, the display apparatuses still do not meet the demands in all aspects. Although some display apparatuses exhibit display functions, development issues in terms of display quality, tolerance to environmental effects, and reliability may still be found in these display apparatuses. 
     SUMMARY 
     The disclosure is directed to a display apparatus in which an adverse impact generated by short-wavelength light is reduced, a flickering phenomenon of the display apparatus is suppressed, and improved display quality and reliability is provided through a filter film capable of reducing a transmittance of a short-wavelength specific band. 
     The display apparatus according to an embodiment of the disclosure includes a panel and a filter film. The filter film is disposed on the panel. A resistance of the filter film is between 10 3  ohm/sq and 10 10  ohm/sq, and a transmittance of the filter film in a wavelength range from 380 nm to 420 nm is less than 100%. 
     According to another embodiment of the disclosure, a display apparatus includes a panel, a polarizer, and a filter film. The polarizer is disposed on the panel. The filter film is disposed on the panel. The transmittance of the filter film in a wavelength range from 380 nm to 420 nm is less than 100%. 
     Based on the foregoing, the display apparatus of an embodiment of the disclosure includes a filter film having a resistance between 10 3  ohm/sq and 10 10  ohm/sq and a transmittance of less than 100% in a wavelength range from 380 nm to 420 nm. Accordingly, arrangement of such a filter film on a panel may endow the functions of resisting static electricity and reducing short-wavelength light. As such, the situation of unfavorable display effect such as flickering caused by the impact of short-wavelength light on the panel is improved, and the display quality and reliability of the display apparatus is thereby enhanced. In some embodiments, the display apparatus includes a panel, a polarizer, and a filter film having a transmittance of less than 100% in a wavelength range from 380 nm to 420 nm. Arrangement of such a filter film on the panel and the polarizer has the function of reducing short-wavelength light. As such, the situation of unfavorable display effect such as flickering caused by the impact of short-wavelength light on the panel is improved, and the display quality and reliability of the display apparatus is thereby enhanced. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification. The accompanying drawings illustrate embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure. 
       Each of  FIG. 1A  and  FIG. 1B  is a cross-sectional schematic view of a display apparatus according to an embodiment of the disclosure. 
         FIG. 2  is a transmittance spectrogram of a filter film in a display apparatus according to an embodiment of the disclosure. 
         FIG. 3  is a transmittance spectrogram of a filter film having different contents of short-wave absorbents in an embodiment of the disclosure. 
         FIG. 4  is a cross-sectional schematic view of a display apparatus in an embodiment of the disclosure. 
         FIG. 5  is a partial cross-sectional schematic view of a display apparatus according to another embodiment of the disclosure. 
         FIG. 6  is a partial cross-sectional schematic view of a display apparatus according to yet another embodiment of the disclosure. 
         FIG. 7  is a partial cross-sectional schematic view of a display apparatus according to yet another embodiment of the disclosure. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     A structure (or layer, component, substrate) being located on another structure (or layer, component, substrate) described in the disclosure may mean that two structures are adjacent and directly connected, or may mean that two structures are adjacent and indirectly connected. Indirect connection means that there is at least one intermediate structure (or intermediate layer, intermediate component, intermediate substrate, intermediate spacing) between two structures, the lower surface of a structure is adjacent or directly connected to the upper surface of the intermediate structure, and the upper surface of the other structure is adjacent or directly connected to the lower surface of the intermediate structure. The intermediate structure may be a single-layer or multi-layer physical structure or non-physical structure, which is not limited. In the disclosure, when a structure is disposed “on” another structure, it may mean that a structure is “directly” disposed on another structure, or a structure is “indirectly” disposed on another structure, that is, at least one structure is sandwiched between a structure and another structure. When a structure is referred to as being “directly disposed on another structure or film, or “directly connected to another structure or film”, there is no component or film inserted between the two structures or films. 
     The terms such as “first”, “second”, “third”, etc. may be used to describe components, but the components should not be limited by these terms. The terms are only intended to distinguish a component from another component in the specification. It is possible that the claims do not use the same terms and replace the terms with “first”, “second”, “third” etc. according to the sequence declared in the claims. Accordingly, in the specification, a first component may be a second component in the claims. 
     Herein, the terms “about”, “approximately”, “substantially”, and “essentially” usually mean within 10%, or within 5%, or within 3%, or 2% or within 1%, or within 0.5% of a given value or range. The quantity given here is an approximate quantity, that is, the meaning of “about”, “approximately”, “substantially”, and “essentially” can still be implied without specifying the terms “about”, “approximately”, “substantially”, and “essentially”. In addition, the terms “a range from a first value to a second value” and “a range between a first value and a second value” indicate that the range includes the first value, the second value, and other values in between. 
     In the disclosure, the transmittance and the multilayer film may be measured by using a cross-sectional image in an optical instrument and a scanning electron microscope, but are not limited thereto. 
     In the disclosure, the following embodiments may be used in any combination without departing from the spirit and scope of the disclosure. For example, some features of one embodiment may be combined with some features of another embodiment to form another embodiment. 
     Exemplary embodiments of the disclosure are described in detail, and examples of the exemplary embodiments are shown in the accompanying drawings. Whenever possible, the same component symbols are used in the drawings and descriptions to indicate the same or similar parts. 
     Each of  FIG. 1A  and  FIG. 1B  is a schematic view of a display apparatus according to an embodiment of the disclosure. Referring to  FIG. 1A  and  FIG. 1B , a display apparatus  10 A may include a panel  12  and a filter film  16 . The filter film  16  is disposed on the panel  12 , and the transmittance of the filter film  16  in a wavelength range from 380 nm to 420 nm is less than 100%. In addition, in one of the embodiments, the filter film  16  may optionally have a resistance between 10 3  ohm/sq and 10 10  ohm/sq. In another aspect, in the embodiment of  FIG. 1B , the filter film  16  is disposed on a polarizer, and the transmittance of the filter film  16  in a wavelength range from 380 nm to 420 nm is less than 100%. In addition, in one of the embodiments, the filter film  16  may optionally have a resistance between 10 3  ohm/sq and 10 10  ohm/sq. In other words, the filter film  16  of  FIG. 1B  is a film layer that has a filter function and is different from a polarizer  14 . The embodiments of  FIG. 1A  and  FIG. 1B  are described in detail later respectively. 
     In  FIG. 1A  and  FIG. 1B , the panel  12  may include a first substrate  100  and a second substrate  200  disposed opposite to each other, and at least include, but is not limited to, a display medium layer  300  and a driving layer  400  disposed between the two substrates, referring to  FIG. 4  to  FIG. 7  hereinafter. In some embodiments, the first substrate and the second substrate may be rigid substrates or flexible substrates. The materials of the first substrate and the second substrate may include, for example, glass, quartz, sapphire, ceramic, plastic, or other suitable materials, or a combination of the foregoing. Plastic materials include, for example but is not limited thereto, polyimide (PI), polycarbonate (PC) or polyethylene terephthalate (PET), liquid-crystal polymers (LCP) or other suitable materials, or a combination of the foregoing materials. The driving layer  400  may be used to drive the display medium layer. A material of the display medium layer includes, but not limited thereto, a liquid crystal material, an electrowetting display material, an electrophoretic display material, an organic light-emitting material, an inorganic light-emitting material, a quantum dot (QD) material, a fluorescence material, a phosphor material, other suitable materials, or a combination of the foregoing materials. 
     Referring to  FIG. 1A , the filter film  16  may be disposed on an outer surface  12   a  of the panel. In the present embodiment, the filter film  16  may optionally have a resistance between 10 3  ohm/sq and 10 10  ohm/sq. In detail, the filter film  16  has a resistance between 10 3  ohm/sq and 10 10  ohm/sq, and may have a function of resisting static electricity, and the transmittance of the filter film in a wavelength range from 380 nm to 420 nm is less than 100%. Light in a wavelength range from 380 nm to 420 nm may be reduced, for example, the transmittance at a wavelength band of 410 nm may be reduced to 6%, and the transmittance at a wavelength band of 405 nm may be reduced to 3%. The adverse impacts of short-wavelength light on the display performance of the panel are reduced. Therefore, in the present embodiment, the filter film  16  in the display apparatus  10 A can endow the functions of resisting static electricity and reducing short-wavelength light. As such, the situation of unfavorable display effect such as flickering caused by the impact of short-wavelength light on the panel is improved, and the display quality and reliability of the display apparatus is thereby enhanced. 
       FIG. 1B  is a schematic view of a display apparatus according to another embodiment of the disclosure. Referring to  FIG. 1B , a display apparatus  10 B includes a panel  12 , a polarizer  14 , and a filter film  16 . The polarizer  14  is disposed on the panel  12 . The filter film  16  is disposed on the polarizer  14 . In the present embodiment, the transmittance of the filter film  16  in a wavelength range from 380 nm to 420 nm is less than 100%, and the filter film  16  is a film layer different from the polarizer  14 . Accordingly, in the present embodiment, the filter film  16  in the display apparatus  10 B may reduce light, for example, in a wavelength range of 380 nm to 420 nm, and reduce the adverse impacts of short-wavelength light on the display performance of the panel, thereby improving the display quality and reliability of the display apparatus. The display apparatus  10 B optionally includes another polarizer, disposed below the panel  12  (not shown). 
       FIG. 2  is a transmittance spectrogram of a filter film in a display apparatus according to an embodiment of the disclosure.  FIG. 2  shows a transmittance spectrogram of a filter film at different wavelengths. The transmittance of the filter film in  FIG. 2  is a spectrogram normalized by taking the maximum transmittance of the filter film as 100%. In the present embodiment, the filter film is, for example, an inorganic multilayer film. The inorganic multilayer film of the filter film may be an inorganic material film that may reduce light having a wavelength range from 380 nm to 420 nm and is formed by a physical vapor deposition (PVD) coating mode. The material is, for example but not limited to, titanium dioxide (TiO 2 ) or silicon dioxide (SiO 2 ). 
     Referring to  FIG. 2 , the filter film may reduce short-wavelength light in a wavelength range from 380 nm to 420 nm, so that the impact of external short-wavelength light on the display performance of the panel may be reduced, the adverse impact on the display apparatus such as flickering may be lowered, and the reliability of the display apparatus may be improved. In more detail, the transmittance of the filter film in a wavelength range from 380 nm to 420 nm may be less than 100%. As shown in  FIG. 2 , the transmittance of the filter film decreases as the wavelength increases from 380 nm to about 400 nm, and then increases as the wavelength increases to 420 nm. In an embodiment, the transmittance of the filter film in a wavelength range from 380 nm to 420 nm may be approximately less than 25%. In another embodiment as shown in  FIG. 2 , the transmittance of the filter film in a wavelength range from 380 nm to 410 nm may be less than or equal to 10%. In another embodiment, the transmittance of the filter film in a wavelength range from 380 nm to 405 nm may be less than or equal to 5%. For example, the transmittance of the filter film in a wavelength range from 420 nm is about 25%, the transmittance in a wavelength range from 410 nm is about 6%, the transmittance in a wavelength range from 405 nm is about 3%, the transmittance in a wavelength range from 390 nm is about 2%, and the transmittance of the filter film in a wavelength range from 380 nm is about 3%. 
     Therefore, the filter film of the present embodiment may achieve the effect of reducing material aging caused by external short-wavelength light irradiating an inner layer of the panel to reduce the impact of short-wavelength light on the display performance, reduce the adverse impacts on the display apparatus such as flicker, and increase the reliability of the display apparatus. 
     Table 1 shows measurement results of flickering of the display apparatus in an embodiment of the disclosure. The filter film in Table 1 is shown in  FIG. 2 . Table 1 shows an irradiation experiment on the filter film and confirms a flicker variation of the filter film used in the display apparatus. The only difference between Comparative Examples 1 and 2 and Examples 1 and 2 is that Comparative Examples 1 and 2 do not use the foregoing filter film. The display apparatuses of Comparative Examples 1 and 2 include the same panel and polarizer, and only two measurements are performed on the display apparatus of the same configuration. In Examples 1 and 2, the filter film of the disclosure is added for measurement based on the configuration of Comparative Examples 1 and 2. The manner adopted for flicker measurement is, for example, driving the panel, switching to a flicker picture, measuring an initial value with a display color meter, switching to a white picture, switching to the flicker picture when irradiating for 1 h with sunlight, and then using the display color analyzer for measurement. If a variance value exceeds 18, it is considered bad. The measurement results are provided in Table 1 as follows. 
     
       
         
           
               
               
               
             
               
                 TABLE 1 
               
             
            
               
                   
               
               
                   
                 Irradiation Under Sunlight 
                 Indoor 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                 Variance 
                   
                   
                 Variance 
               
               
                   
                   
                   
                 value 
                   
                   
                 Value 
               
               
                   
                 0 hr 
                 1 hr 
                 (Delta) 
                 0 hr 
                 1 hr 
                 (Delta) 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Comparative 
                 −44.4 
                 −26.3 
                 18.1 
                 −49.1 
                 −36.3 
                 12.8 
               
               
                 Example 1 
                   
                   
                   
                   
                   
                   
               
               
                 Comparative 
                 −44.4 
                 −25.1 
                 19.3 
                 −44.8 
                 −34.3 
                 10.5 
               
               
                 Example 2 
                   
                   
                   
                   
                   
                   
               
               
                 Example 1 
                 −40.2 
                 −29 
                 11.2 
                 −49.1 
                 −36.3 
                   
               
               
                 Filter Film 
                   
                   
                   
                   
                   
                   
               
               
                 Example 2 
                 −41.4 
                 −27.1 
                 14.3 
                 −44.8 
                 −34.3 
                   
               
               
                 Filter Film 
               
               
                   
               
            
           
         
       
     
     It can be seen from Table 1 that compared with the variation value of Comparative Examples 1 and 2 exceeding an evaluation value of 18, it is confirmed that the display apparatuses of Examples 1 and 2 of the disclosure include the foregoing filter film having a specific transmittance in a specific band. Therefore, a flicker variation value can be reduced to be less than 18. Accordingly, it can be seen that in the display apparatus including the specific filter film of the disclosure, the phenomenon of unfavorable display effect of flickering of the panel is improved, and the display quality and reliability is enhanced. 
     In another embodiment, the filter film may be an organic film, but the disclosure is not limited thereto. More specifically, for the filter film, by adding a short-wavelength absorbent in an organic solution and by changing a content ratio of the short-wavelength absorbent in the organic solution, the transmittance of the filter film may be adjusted, and light in a specific wavelength range from 380 nm to 420 nm may be reduced, so as to obtain a filter film having a transmittance of less than 100% in a wavelength range from 380 nm to 420 nm. 
       FIG. 3  is a transmittance spectrogram of a filter film having different contents of short-wave absorbents in an embodiment of the disclosure.  FIG. 3  shows a transmittance spectrogram of a filter film in which filter films  16 A to  16 E sequentially represent a descending content of a short-wavelength absorbent. In detail, as shown in  FIG. 3 , the transmittance of the filter film at a wavelength of 380 nm may be about 20-80%, and the transmittance at a wavelength of 420 nm may be about 70-96%. It can be seen from  FIG. 3  that compared with the organic filter film  16 E with a low content of short-wavelength absorbent, the transmittance of the organic filter film  16 A with a high content of short-wavelength absorbent may be reduced by about 15-60% in a wavelength range from 380 nm to 420 nm. 
     It can be seen from  FIG. 3  that the overall transmittance (greater than the average of 420 nm to 800 nm) of the organic filter film  16 A with the highest content of short-wavelength absorbent is about 80%, and the transmittance in a wavelength range from 380 nm to 420 nm is about 20% to about 70%. The overall transmittance of the organic filter film  16 E with the lowest content of short-wavelength absorbent is about 95%, and the transmittance in a wavelength range from 380 nm to 420 nm is about 75% to about 95%. The overall transmittance of the organic filter film  16 D with the second highest content of short-wavelength absorbent is about 90%, and the transmittance in a wavelength range from 380 nm to 420 nm is about 54% to about 94%. Therefore, by controlling the content of the short-wavelength absorbent in the organic filter film, a balance between the overall transmittance of the filter film and the transmittance in a wavelength range from 380 nm to 420 nm may be achieved. The material of the organic filter film is, for example, poly(3,4-ethylene dioxythiophene (PEDOT). The short-wavelength absorbent is, for example, a benzophenone derivative. The disclosure is not limited to thereto. 
       FIG. 4  is a cross-sectional schematic view of a display apparatus in an embodiment of the disclosure. Referring to  FIG. 4 , a display apparatus  100 A includes a panel  12  and a filter film  360 . The panel  12  may include a first substrate  100  and a second substrate  200 , and a display medium layer  300  disposed between the two substrates  100  and  200 . In the present embodiment, the filter film  360  is disposed on the other surface of the second substrate  200  opposite to the display medium  300 . In more detail, a driving layer  400  for driving the display medium is disposed between the first substrate  100  and the display medium layer  300 . In detail, the driving layer  400  may include a first conductive layer M 1  including a gate  112  and a common line  114 , a gate insulating layer  120 , an active layer  130 , a second conductive layer M 2  including a source  140  and a drain  142 , a first insulating layer  150 , a first overcoat layer  160 , a pixel electrode  170  and a shared electrode line  172 , a second insulating layer  180 , a touch signal line  191  (third conductive layer M 3 ), a third insulating layer  190 , and a touch electrode  192 . In addition, a first alignment layer  194  is disposed between the touch electrode  192  and the display medium layer  300 . The common line  114 , the shared electrode line  172 , and the touch electrode  192  are electrically connected. The touch electrode  192  and the touch signal line  191  are electrically connected. The touch electrode  192  receives a common voltage provided by the common line  114  during a display period, but receives a voltage for touch detection provided by the touch signal line  191  during the touch period. 
     In addition, as shown in  FIG. 4 , black matrices  210  and  212 , a color filter layer  220 , and a second overcoat layer  230  may be sequentially disposed between the second substrate  200  and the display medium layer  300  from the direction of the second substrate  200 . In addition, a second alignment layer  294  is disposed between the second overcoat layer  230  and the display medium layer  300 . A spacer  312  and a sealant  320  are disposed between the first substrate  100  and the second substrate  200 . The spacer  312 , such as a photo spacer, is used to support a distance between the first substrate and the second substrate. The space between the first substrate and the second substrate is a space for a display medium to fill. The display medium is, for example, liquid crystal  310 , which may be twisted to different degrees with the voltage applied by the driving layer, thereby exhibiting different refractive indexes and controlling the flux of light through. Inner surfaces of the first substrate  100  and the second substrate  200  are jointed by the sealant  320 . In addition, the materials of the first insulating layer  150 , the second insulating layer  180 , and the third insulating layer  190  may be inorganic materials, organic materials, or a combination of the foregoing, and may optionally have a protective function. In addition, the insulating layers have less uneven surfaces, and the electrodes may be smoothly disposed on the insulating layers, and thus the electrical properties are stable. 
     The display apparatus of  FIG. 4  includes a filter film  360 . In the present embodiment, the transmittance of the filter film  360  in a wavelength range from 380 nm to 420 nm is less than 100%. In some embodiments, the transmittance of the filter film  360  in a wavelength range from 380 nm to 420 nm is greater than or equal to 0%. The transmittance of the filter film  360  may be the same as the foregoing filter layer in  FIG. 2 , or the foregoing filter layer in  FIG. 3 , or the foregoing combination, and the disclosure is not limited thereto. In addition, the filter film  360  of the present embodiment may further optionally have a resistance between 10 3  ohm/sq and 10 10  ohm/sq, so that in addition to reducing short-wavelength light, it also has a function of resisting static electricity. In other words, the filter film  360  having a resistance between 10 3  ohm/sq and 10 10  ohm/sq may allow the display apparatus to discharge static electricity from the device while performing display or touch functions. Moreover, the filter film having a transmittance of less than 100% in a wavelength range from 380 nm to 420 nm may reduce short-band light having a wavelength range from 380 nm to 420 nm, and reduce the adverse effects of short-wavelength light on the display performance of the panel. In other words, in the present embodiment, the filter film may have the functions of resisting static electricity and reducing short-wavelength light between 380 nm and 420 nm. 
     In the present embodiment, the transmittance measurement method for the filter film is to perform measurement using, for example, a chromaticity spectrum analyzer, but the disclosure is not limited thereto. The resistance measurement method for the filter film is to measure the resistance of the filter film of the disclosure, such as 10 8  ohm/sq or 10 9  ohm/sq, using, for example, a high-impedance sheet resistance measuring machine, but the disclosure is not limited thereto. 
       FIG. 5  is a partial cross-sectional schematic view of a display apparatus according to another embodiment of the disclosure. The embodiment of  FIG. 5  uses the component numbers and partial content of the embodiment of  FIG. 4 , where the same or similar reference numbers are used to represent the same or similar components, and the description of the same technical content is omitted. For the description of the omitted parts, reference may be made to the description and effects of the foregoing embodiments. The following embodiments will not be repeated, and at least part of the descriptions not omitted in the embodiment of  FIG. 5  may be referred to the subsequent content. 
     Referring to  FIG. 5 , a display apparatus  100 B of the present embodiment includes a panel  12 , a polarizer  400 , and a filter film  460 . In the present embodiment, the filter film  460  is a film layer different from the polarizer  400  that has the function of reducing short-wavelength light. In more detail, the transmittance of the filter film  460  in a wavelength range from 380 nm to 420 nm is less than 100%. In some embodiments, the transmittance of the filter film  360  in a wavelength range from 380 nm to 420 nm is greater than or equal to 0%. By providing the filter film  460  on the panel  12 , it is possible to reduce the incidence of light in a short wavelength range of 380 nm to 420 nm into the panel. In the present embodiment, the resistance of the filter film  460  is not limited. In other words, in the present embodiment, as long as the filter film satisfies the function of reducing short-wavelength light between 380 nm and 420 nm, light in a wavelength range from 380 nm to 420 nm may be reduced, and the adverse impacts of short-wavelength light on the display performance of the panel can be reduced, thereby improving the display quality and reliability of the display apparatus. 
     In addition, the position of the filter film  460  in the present embodiment is described by, not limited to, taking as an example that the filter film is disposed between the panel  12  and the polarizer  400 . The filter film  460  is not limited to be disposed between the panel  12  and the polarizer  400 . In some embodiments, the filter film  460  may be disposed on an outer side of the polarizer, as shown in a position P 1  in  FIG. 5 . In some other embodiments, the polarizer  400  may be disposed between the filter film  460  and the panel  12 , and the disclosure is not limited thereto. 
       FIG. 6  is a partial cross-sectional schematic view of a display apparatus according to yet another embodiment of the disclosure. The embodiment of  FIG. 6  uses the component numbers and partial content of the embodiment of  FIG. 5 , where the same or similar reference numbers are used to represent the same or similar components, and the description of the same technical content is omitted. For the description of the omitted parts, reference may be made to the description and effects of the foregoing embodiments. The following embodiments will not be repeated, and at least part of the descriptions not omitted in the embodiment of  FIG. 5  may be referred to the subsequent content. 
     Referring to  FIG. 6 , a main difference between a display apparatus  100 C of the present embodiment and the display apparatus  100 B of the foregoing embodiments is that: the display apparatus  100 C of the present embodiment may further include a transparency adhesive layer  500 . The transparency adhesive layer  500  may be, for example, an optical clear adhesive (OCA) or other suitable adhesive materials. The transparency adhesive layer  500  is, for example, disposed on a polarizer. In this case, the transparency adhesive layer  500  may have a protective function, such as scratch resistance or reflection resistance. The filter film  560  of  FIG. 6  is a film layer different from the polarizer  400  that has the function of reducing short-wavelength light. For the description of the position of the filter film  560 , the filter film  560  is disposed, for example but not limited to, between the panel  12  and the polarizer  400 . In some embodiments, the filter film  560  may also be disposed a position P 1  between the polarizer  400  and the transparency adhesive layer  500 . In some other embodiments, the filter film  560  may be disposed on an opposite surface of the transparency adhesive layer  500  with respect to the polarizer  400 , as shown in a position P 2  in  FIG. 6 . In addition, in other embodiments, the filter film may be disposed between the transparency adhesive layer  500  and the panel. In some other embodiments, the transparency adhesive layer may be disposed between the filter film and the panel. 
     In addition, in other embodiments, the display apparatus may also replace the transparency adhesive layer  500  in  FIG. 6  with a protective cover  600 . Specifically, the transparency adhesive layer  500  in  FIG. 6  is replaced with the protective cover  600 . In the present embodiment, the display apparatus includes a panel, a polarizer, and a protective cover without including the transparency adhesive layer  500 . In such an implementation, the filter film  560  may be disposed between the panel  12  and the polarizer  400 . In some embodiments, the filter film may be disposed between the polarizer  400  and the protective cover  600 , as shown in a position P 1  in  FIG. 6 . In some other embodiments, the filter film  560  may be disposed on an opposite surface of the protective cover  600  with respect to the polarizer  400 , as shown in a position P 2  in  FIG. 6 . 
       FIG. 7  is a partial cross-sectional schematic view of a display apparatus according to yet another embodiment of the disclosure. The embodiment of  FIG. 7  uses the component numbers and partial content of the embodiment of  FIG. 6 , where the same or similar reference numbers are used to represent the same or similar components, and the description of the same technical content is omitted. For the description of the omitted parts, reference may be made to the description and effects of the foregoing embodiments. The following embodiments will not be repeated, and at least part of the descriptions not omitted in the embodiment of  FIG. 6  may be referred to the subsequent content. 
     Referring to  FIG. 7 , a main difference between a display apparatus  100 D of the present embodiment and the display apparatus  100 C of the foregoing embodiment is that the display apparatus  100 D of the present embodiment includes both a transparency adhesive layer  500  and a protective cover  600 . The protective cover  600  is, for example but not limited to, cover glass. The protective cover  600  is, for example, disposed on the transparency adhesive layer  500 , which may reduce damage to internal components of the panel by the external environment. In an implementation where the display apparatus  100 D includes a polarizer  400 , a transparency adhesive layer  500 , and a protective cover  600 , the filter film  660  of  FIG. 7  is a film layer different from the polarizer  400  that has the function of reducing short-wavelength light. For the description of the position of the filter film  660 , the filter film  660  is disposed, for example but not limited to, between the panel  12  and the polarizer  400 . In some embodiments, the filter film  660  may also be disposed between the polarizer  400  and the transparency adhesive layer  500 , as shown in a position P 1  in  FIG. 7 . In some embodiments, the filter film  660  may be disposed between the transparency adhesive layer  500  and the protective cover  600 , as shown in a position P 2  in  FIG. 7 . In some other embodiments, the filter film  660  may be disposed on an opposite surface of the protective cover  600  with respect to the polarizer  400 , as shown in a position P 3  in  FIG. 7 . 
     According to the foregoing, the display apparatus provided by the embodiments of the disclosure may effectively reduce the impact of short-wavelength light on the display quality of the panel by providing the filter film having a transmittance of less than 100% in a wavelength range from 380 nm to 420 nm on the panel. Further, the advantages of reducing the adverse impacts of short-wavelength light on the display performance of the panel, improving the display quality, and enhancing the reliability of the display apparatus are also provided. 
     Although the disclosure has been described with reference to preferred aspects, a person of ordinary skill in the art should understand that changes may be made in form and detail without departing from the spirit and scope of the disclosure. The features of the embodiments may be used in any combination without departing from the spirit of the disclosure or conflicting with each other.