Patent Publication Number: US-2023152512-A1

Title: Display cover

Description:
BACKGROUND 
     CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the priority benefit of Taiwan application serial No. 110142981, filed on Nov. 18, 2021. The entirety of the above-mentioned patent applications is hereby incorporated by reference herein and made a part of this specification. 
     Technical Field 
     The present invention is related to a display cover. More specifically, the present invention is related to a display cover with a light conduction layer covering an illuminant. 
     Related Art 
     Display covers used for displaying specific information and patterns can be widely applied to a variety of fields. For examples, display covers can be applied to a variety of display screens or illuminant devices, such as decoration lamps, atmosphere lamps, lighting fixtures, automotive covers, dashboards of appliances, panels of medical instruments, etc. However, in addition to main structure of a cover, other parts such as circuit boards for illuminant display covers and illuminant, are also provided in a display cover and result in bulky appearance of a display cover which occupies undesired space and has unwanted weight. Furthermore, cost and working hours for assembling display covers are increased corresponding to numerous assembly parts and multiple assembly process. Therefore, improved display covers with compact size for displaying specific information or patterns are desirable. 
     SUMMARY 
     Technical Means for Solving Problems 
     To solve the problems mentioned above, according to one embodiment of this invention, a display cover is provided, which includes: a light transmitting layer; window patterns, corresponding to design of predetermined patterns and defining a light transmitting windows with the predetermined patterns on the light transmitting layer; at least one light source, provided above the light emitting layer or the window patterns; and a light conduction layer provided above the light transmitting layer and covering the window patterns and the at least one light source. There is at least one light guide structure provided at one side of the light conduction layer, which is facing away the light transmitting layer, and is configured to at least partially guide light emitted from the at least one light source to the light transmitting window. 
     Compared to prior art, the display cover shown by the embodiments of the present application eliminates needs of providing light source or electrical circuit boards above the light conduction layer, and decreases overall thickness or weight of the display cover. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a perspective view of a display cover according to one embodiment of the present invention. 
         FIG.  2    is a cross-sectional view along the cross-section line A-A′ shown in  FIG.  1   . 
         FIG.  3    illustrates that the light guide structure directs light toward the light transmitting window according to one embodiment of the present invention. 
         FIG.  4    is a cross-sectional view illustrating a display cover according to another embodiment of the present invention. 
         FIG.  5    is a top view illustrating parts of the display cover according to another embodiment of the present invention. 
         FIG.  6    is a process illustrating the manufacturing method for the display cover according to another embodiment of the present invention. 
         FIG.  7 A - FIG.  7 C  illustrate steps of the foregoing manufacturing method for the display cover according to another embodiment of the present invention. 
         FIGS.  8 A to  8 F  are schematically cross-sectional views of a display cover plate according to various embodiments of the present invention. 
         FIG.  9    illustrates the display cover according to another embodiment of the present invention. 
         FIG.  10    is a cross-sectional view of the display cover according to another embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     The following description illustrates variety of embodiments, and people skilled in the related art may easily understand spirit and principles of the present invention by referring the description with the accompanied drawings. Although some specific embodiments are described in detail, they are only exemplary for illustration and not for limitation to the present invention. Therefore, variation and modification may be obvious and easily achieved by people skilled in the art under the scope and the spirit of the present invention. 
     Referring to  FIG.  1    and  FIG.  2   , which are a perspective view and a cross-sectional view that illustrate a display cover  10  of the present invention. The display cover  10  is used for showing a predetermined pattern D. The predetermined pattern D can be changed to any letters, shapes or figures, and the “I” character is only for example, and not for limitation to the present invention. The display cover  10  shows a predetermined pattern D through a light transmitting window W lighten by light ray L, and the predetermined pattern D can be applied to all scenarios requiring the predetermined pattern D. For instance, the predetermined pattern D can be applied to decorative lamps, mood lamps, lighting lamps, vehicle covers, electrical instrument panels, medical instrument panels and other light signal display screens or lighting fixtures for displaying predetermined patterns D. 
     Now referring to  FIG.  2   , according to this embodiment, the display cover  10  may comprise a light transmission layer  100 , a window pattern  200  disposed on the light transmission layer  100  which is corresponding to a predetermined pattern D design, at least one light source  400  disposed on the light transmission layer  100  or the window pattern  200 , and a light conduction layer  600  disposed on the light transmission layer  100  and covering the window pattern  200  and the at least one light source  400 . 
     Specifically, the light transmission layer  100  could be any transparent film layer, for example, transparent and decorative thin films used to maintain integrity or consistency of appearance of an object. The transparent and decorative thin films could be made of one of the following materials: Polycarbonate (PC), Polyethylene terephthalate (PET), poly (methyl methacrylate) (PMMA), Polyimide (PI), and Acrylonitrile Butadiene Styrene (ABS). Compared to the light transmission layer  100  having the window pattern  200  with lower light transmittance, components sprayed in black or dark ink can be disposed on the light transmission layer  100  to shield areas external to the predetermined pattern D. Thereby, the light transmission window W with the predetermined pattern D can be defined on the light transmission layer  100 . 
     As noted above, referring to  FIG.  3    in conjunction with  FIG.  2   , at least one light source  400  could be disposed on the light transmission layer  100  or the window pattern  200  and configured to emit light L. For example, the at least one light source  400  could be LEDs, organic light-emitting elements, electroluminescent elements, etc. However, the invention is not limited the manner described above. 
     According to some embodiments, in order to let people outside hardly perceive the existence of the light source  400 , the light source  400  may be disposed on a side of the window pattern  200  facing away from the light transmission layer  100 . However, the present invention is not limited to the manner described above. 
     The light conduction layer  600  disposed to overlap the window pattern  200  and the at least one light source  400  could be, for example, a plastic module. According to some embodiments, the above-mentioned window pattern  200  and the above-mentioned at least one light source  400  could be embedded in the light conduction layer  600 . Therefore, when the at least one light source  400  illuminates, the light L could be directly incident into the light conduction layer  600  for conduction without entering the light conduction layer  600  through the interface between different media. Therefore, loss rate of the light L emitted by the light source  400  could be reduced or avoided. In other words, deflection of the light L possibly emitted by the light source  400  through different media could be reduced or avoided. 
     According to some embodiments, the light L emitted by the light source  400  could be directly incident into the light conduction layer  600 , and is conducted or diffused in the light conduction layer  600  based on structural and shape changes (for example, total reflection in the light conduction layer  600  of the plastic module, but not limited to this) to increase light diffusivity or uniformity. Therefore, there is no need for additional diffusion components or media layers. In addition, when passing through different media, light loss/reduction of transmitted light at the interface of the media caused by diffusion members could also be reduced or avoided. 
     Specifically, as shown in  FIG.  2   , one side of the light conduction layer  600  which is facing away from the light transmission layer  100  could have at least one light-guiding structure  800 . Thereby, further referring further to  FIG.  3    with combination with  FIG.  2   , at least one light-guiding structure  800  could be configured to at least partially guide the light L emitted by the light source  400  to the light transmission window W of the predetermined pattern D. In this way, uniformity and brightness of the emitted light could be effectively improved, and irradiating distance could be increased (for example, toward the expected light-emitting direction of the light transmission window W or an extending direction of the light conduction layer  600 ). In the meantime, numbers or power of the installed light source  400  could be reduced. Therefore, when a predetermined device or a predetermined scenario provided with the display cover  10  that emits light, one observer on the side of the light transmission layer  100  which faces away from the light conduction layer  600  could see the predetermined pattern D displayed by the emitting display cover  10 . 
     Therefore, based on the light guide structure  800  formed on the light conduction layer  600  and the light source  400  covered by the light conduction layer  600 , a light and compact display cover  10  could be provided through a simplified and integral structure. Furthermore, the display cover  10  of the present embodiment reduces or avoids possible loss and variation of light emitted through different media because there are less or no additional circuit boards or light emission elements attached to the light conduction layer  600 . Thereby, efficiency, accuracy and stability of light emission and/or light guiding of the display cover  10  can be obtained under this simplified structure disclosed by the embodiment. 
     In the illustration shown in  FIG.  2    and  FIG.  3   , the light source  400  could be a single front-emitting LED. However, the elements described above are not limitation to the present invention. Variety kinds of LEDs, such as laterally emitting LEDs, wide-angle/full-angle LEDs could be provided. Alternatively, different light sources other than LEDs may also be provided. As mentioned above, examples shown and described here are only for illustration and not for limitation to this invention. 
     Next, referring to  FIG.  4    with  FIG.  5   , which is a top view from the direction Dn of  FIG.  4   , the display cover  20  may substantially further include a conductive pattern  300  disposed on the light transmission layer  100  or a window pattern  200  according to another embodiment of the present invention. Specifically, in order to reduce or avoid additionally attached circuit boards, the circuit configuration and/or circuit design corresponding to the at least one light source  400  can be directly formed on the light transmission layer  100  in a form of a conductive patterns  300 , or formed on the window pattern  200 . Thereby, at least one light source  400  can be electrically connected to the conductive pattern  300  and can be turned on to emit light. 
     According to some embodiments, the conductive pattern  300  could be disposed on one side of the window pattern  200  which is facing away from the light transmission layer  100 . An observer on the side of the light transmission layer  100  which is facing away from the light transmission layer  600  hardly perceives the conductive pattern  300  because of the shielding of the window pattern  200 . However, the elements described above are not limitation to the present invention. For example, when the conductive pattern  300  is made of a light transmission material, the conductive pattern  300  could extends from the window pattern  200  to the light transmission window W provided on the light transmission layer  100  without being detected by an outside observer. In this embodiment, for example, the conductive pattern  300  could have a touch function to be touched by an outside observer. In addition, similar to the window pattern  200  and the at least one light source  400 , the conductive pattern  300  may be covered by the light conduction layer  600 . For example, the conductive pattern  300  can be embedded in the light conduction layer  600 . 
     Next, a method of manufacturing a display cover according to some embodiments of the present invention will be described with reference to  FIG.  6    to  FIG.  7 C . 
     Referring to  FIG.  6   , a method  1000  manufacturing a display cover according to an embodiment of the present invention sequentially includes step S 1 , step S 2  and step S 3 . 
     Referring to  FIG.  7 A , in step S 1 , a light transmission layer  100  could be provided firstly. Then, dark material such as dark ink is printed or coated on the light transmission layer  100  corresponding to a desired pattern, and thereby the window pattern  200  could be formed. 
     Next, referring to  FIG.  7 B , in step S 2 , at least one light source  400  such as an LED patch and a conductive pattern  300  corresponding to circuit employment and design of the light source  400  could be disposed on the light transmission layer  100  or on the window pattern  200 . Specifically, the conductive pattern  300  could be formed by printing or coating a conductive ink, such as conductive silver paste, on the light transmission layer  100  or the window pattern  200 . The light source  400  could also be disposed on the light transmission layer  100  or on the window pattern  200 , and could be electrically connected to the conductive pattern  300 . For example, the conductive pattern  300  could be made by screen printing with a conductive ink, such as conductive silver paste, having a line width of 0.2-1 mm and a thickness of 3-10 um (could be adjusted based on source current of light/the characteristics of the conductive ink such as conductive silver paste/printing parameters). According to some embodiments, in order to prevent outside observers from unexpectedly perceiving the conductive pattern  300  and the light source  400 , the conductive pattern  300  and the light source  400  may be formed on the window pattern  200  without directly contacting the light transmission layer  100 . However, the elements described above are not limitation to the present invention. 
     According to some embodiments, the above-mentioned conductive ink, such as conductive silver paste, could be high-temperature resistant conductive ink. For example, conductive ink with tolerance temperature up to 150° C. or above could be used. In addition, conductive silver paste could be used to electrically connect the conductive pattern  300  and the light source  400 , and the conductive silver paste may also have tolerance of high temperature. For example, baking and curing during the temperature range of 60-150° C. (could be adjusted according to tolerance temperature of conductive materials, such as conductive ink/other components) could be performed. However, the elements described above are not limitation to the present invention. According to other embodiments, conductive materials, such as conductive inks with tolerance range of temperature 90-130° C. or with tolerance range of lower temperature 60-80° C., could also be used. 
     Based on the mentioned above, referring to  FIG.  7 C  with combination of  FIG.  7 B , in the above-mentioned step S 2 , a completely assembled structure of the light transmission layer  100 , the window pattern  200 , at least one light source  400  and the selectively disposed conductive pattern  300  is a screen layer SL. For example, the screen layer SL could be a combination of an outside decorative film intended to be displayed externally and an inside thin film circuit and an inside light source. In step S 3  shown in  FIG.  7 C , the screen layer SL could be disposed in a specific mold with injection of molten plastic to form the corresponding light conduction layer  600 . That is, the display cover  20  could be injection-molded by injection of molding plastic on the screen layer SL to form a cured light conduction layer  600  by means of in-mold electronics. Thereby, one-piece molding could be accomplished, and the window pattern  200 , the at least one light source  400  and the selectively disposed conductive pattern  300  cover are embedded in the integrated display cover plate  20  of the light conduction layer  600 . According to other embodiments, in addition to injection molding, the light conduction layer  600  could sheathe the light source  400  by means of perfusion, so that the light L could be directly incident into the light conduction layer  600  for conduction. 
     According to some embodiments, the at least one light guide structure  800  formed on the side of the light conduction layer  600  which is facing away the light transmittance layer  100  could be transferred to the light conduction layer  600  corresponding to structure in the mold during in-mold electronic process. In this way, the light guide structure  800  could be accomplished by a relatively efficient procedure. Alternatively, according to other embodiments, the at least one light guide structure  800  could be formed by injection molding a semi-finished product of the display cover  20  of the cured light conduction layer  600 , and then through subsequent processing such as etching, cutting, and attaching. In this way, the light guide structure  800  could be accomplished by few fixed molds. According to different embodiments of the present invention, process and details for forming the at least one light guide structure  800  are not limited to the aspects specifically shown in the specification and the drawings. 
     Hereinafter, a display cover having a light guide structure  800  according to various embodiments of the present invention will be described with further reference to  FIG.  8 A  to  FIG.  8 F . 
     Firstly referring to  FIG.  8 A , according to one embodiment, at least one light guide structure  800  of the display cover  30  may include a microstructure  820  for reflecting and guiding light to the light transmission window W. The microstructure  820  could be any microstructures beneficial for reflecting light or guiding light to the light transmission window W. The microstructure  820  could be located on the light path of the light L emitted by the at least one light source  400 . For example, the microstructure  820  may have a plurality of microstructure units  825  deployed to form concave and convex holes, such as sawtooth or wavy shape, and at least one light source  400  may be lateral-emitting LEDs. Thereby, light L could propagate to the microstructure  820  in the light conduction layer  600  and could be guided to the light transmission window W by reflection of the microstructure  820 . 
     Next, referring to  FIG.  8 B , according to one embodiment, at least one light guide structure  800  of the display cover  40  may include an inclined surface structure  840  for reflecting and guiding light to the light transmission window W. The inclined surface structure  840  may define a reflective surface  845  facing interior of the light conduction layer  600 . The reflective surface  845  faces the light transmission window W and is inclined relative to an extending direction dl of the light conduction layer  600 , so that it can reflect the light L from at least one light source  400 . For example, the inclined surface structure  840  could be disposed that, relative to the reflective surface  845 , the optical path of light L emitted by the at least one light source  400  and the incident angle into the reflective surface  845  are symmetrical to or corresponding to the optical path of light L reflected from the reflective surface  845  and the exiting angle. However, the elements and the structures described above are not limitation to the present invention. In addition, at least one light source  400  may be a front-emitting LED to emit light toward the inclined surface structure  840 . Thereby, the light L could propagate in the light conduction layer  600  to the inclined surface structure  840  and could be guided to the light transmission window W by reflection of the inclined surface structure  840 . 
     According to some embodiments, as shown in  FIG.  8 B , at least one reflective layer  860  is disposed on the back surface of the at least one light guide structure  800  which is facing away the light transmission layer  100 , and the at least one reflective layer  860  reflects light L emitted by at least one light source  400 . Therefore, brightness of the emitted light could be improved. For example, in order to further enhance reflection of light L from the inclined surface structure  840  and reduce probability of light L escaping from the light conduction layer  600 , at least one reflective layer  860  could be disposed behind the inclined surface structure  840 . However, the elements and the structures described above are only for illustration, and are not limitation to the present invention. For example, the reflective layer  860  may not be provided, and light L may be simply reflected by the inclined surface structure  840 . 
     Referring to  FIG.  8 C , the display cover  50  could basically have the light guide structure  800  being similar to the structure shown in  FIG.  8 B . Difference between  FIG.  8 C  and  FIG.  8 B  is that the inclined surface structure  840  of  FIG.  8 B  is recessed in the light conduction layer  600 , and the inclined surface structure  840  in  FIG.  8 C  is protruding from the light conduction layer  600 . Various embodiments of the present invention could be understood through different aspects, and the light guide structure  800  could be manufactured flexibly according to various designs or manufacturing process. Various light guide structures  800  should be within the scope of the present invention. 
     As noted above, referring to  FIG.  8 D , according to the display cover  60  of one embodiment, the reflective layer  860  could also be disposed behind the microstructure  820  similar to that shown in  FIG.  8 A . In this way, reflection from the microstructure  820  and guiding light L by the microstructure  820  could be further enhanced, and probability of light L escaping from the light conduction layer  600  could be reduced or avoided. 
     Further, referring to  FIG.  8 E , according to an embodiment, the light guide structure  800  of the display cover  70  may have various combinations of the above-mentioned structures. Specifically, as shown in  FIG.  8 E , the light guide structure  800  may include the above-mentioned microstructure  820 , the inclined surface structure  840  and the reflective layer  860 . The microstructure  820  could be disposed, for example, on one side of the light conduction layer  600  which is near the light source  400  and facing away the light transmission layer  100 , and the inclined surface structure  840  could be disposed on one side of the light conduction layer  600  which is far from the light source  400  and facing away from the light transmission layer  100 . Thus, the reflective surface  845  faces the light source  400  and the light transmission window W. In addition, the reflective layer  860  could be disposed on a backside of the inclined surface structure  840  to increase the reflection capability of the inclined surface structure  840  and reduce or prevent light L from unexpectedly exiting the light conduction layer  600 . As mentioned above, various structures could be combined to direct light L in all possible directions or angles to the light transmission window W. 
     When the light source  400  and the inclined surface structure  840  are disposed on both sides of the light transmission window W, the light source  400  could be lateral-emitting LEDs emitting light L toward the inclined surface structure  840 . However, the elements described above are not limitation to the present invention. 
     As mentioned above, according to another embodiment shown in  FIG.  8 F , the display cover  80  could also be used in combination with the above-mentioned various structures similar to the above-mentioned embodiment. For example, the light guide structure  800  could include the above-mentioned microstructure  820 , the inclined surface structure  840 , and the reflective layer  860  disposed behind the inclined surface structure  840 . At least one light source  400  and the inclined surface structure  840  are oppositely disposed on one side of the light transmission window W, and the inclined surface structure  840  and the microstructure  820  are relatively near the front surface of the light source  400 . Therefore, in this embodiment, at least one light source  400  may be front-emitting LEDs emitting light L toward the microstructure  820  and the inclined surface structure  840  disposed in the front. 
     According to some embodiments, wavelength of light L emitted by the at least one light source  400  changes after being reflected through the at least one reflective layer  860 . For example, the reflective layer  860  could be reflective material with specific colors, and light L will change color after being reflected by the reflective layer  860 . Thereby, characteristics of the light displayed by the display cover could be further adjusted. 
     Although the above-mentioned microstructures  820  are all disposed corresponding to the light transmission window W, the microstructures  820  may also be relatively disposed on the light conduction layer  600  on both sides of the light transmission window W, and appropriately reflect or guide light L to the light transmission window W based on small changes in shapes of the structures based on other embodiments. The aspects shown in this specification and the drawings are only for illustration, and are not limitation to the present invention. 
     As described above, with reference to the above-mentioned various aspects, people having ordinary knowledge in the related technical field should be able to understanding that the specific structure and combination of the light guide structure  800  could be adjusted based on different requirements. For example, the specifically detailed structure and configuration could be deployed and adjusted based on desired emitting range of the light transmission window W, desired light path, angles and directions of exiting light, and desired uniformity and intensity of illumination. Accordingly, exemplary aspects specifically illustrated in the description and drawings are not limitation to the present invention. 
     The above-mentioned microstructures  820  and the inclined surface  840  could be formed by, for example, shapes or structures of molds, or could be formed by etching or cutting after the light conduction layer  600  is formed. Additionally, the reflective layer  860  could be attached at the same time when the light conduction layer  600  is formed by lining on a specific part of the mold and injecting plastic into the mold, or the reflective layer  860  could be formed by being attached to the reflective layer  860  after the light conduction layer  600  is formed. As noted above, the display cover could be formed within the scope of the present invention, and the applicable manufacturing process and means are not limited to above mentioned. In addition, the proportions and relative proportions of each component shown in the drawings of the present application may be enlarged or highlighted for the sake of clear illustration. Therefore, people skilled in the related art should understand that the overall and actual proportions of the components of the display cover manufactured according to the embodiments of the present invention are not limited to the proportions specifically shown in the drawings. 
     Please refer to  FIG.  9   , the upper part in  FIG.  9    shows a schematically cross-sectional view of the display cover  90 , and the lower part in  FIG.  9    shows a top view of relative deployment of the microstructures  820 , the light sources  410  and  420  in the display cover  90 . It should be noted that, in order to make the drawings be easily understood, some elements, such as the reflective layer  860 , are not shown in the top view of  FIG.  9   . According to another embodiment of the present invention, the display cover  90  could have, for example, two light sources  410  and  420 , which are disposed opposite on two sides of the light transmission window W, respectively. As noted above, in this embodiment, the light guide structure  800  may include the microstructure  820  and the reflective layer  860  selectively disposed on the back surface of the microstructure  820 . When the plurality of microstructure units  825  of the microstructure  820  is distant from the light sources  410  and  420  (for example, closer to the middle of the light transmission window W), it has higher density. For example, when each microstructure unit  825  is far from the light source  410  or  420 , spacing among each microstructure unit  825  could be smaller, or the size of the microstructure unit  825  itself could be smaller. Thereby, the microstructure units  825  with high density could increase reflection of light to compensate that less light is reflected when the microstructure units  825  is distant from the light source  410  or  420 . Therefore, according to this embodiment, by using the microstructures  820  with different density, the light transmission window W or the display cover  90  with longer length could be achieved through less light sources (for example, through two light sources  410  and  420 ) without sacrifice of emitting efficiency and uniformity. 
     Because other details according to this embodiment are similar or identical to the embodiments described above, they will not be described here. Additionally, according to some embodiments, only one light source  410  may be provided, and the density of the microstructures  820  that are relatively far from the light source  410  could be increased (for example, the density is higher when the microstructures  820  are closer to the right). Alternatively, only one light source  420  may be provided, and density of the microstructures  820  that are relatively far from the light source  420  is increased (for example, the density is higher when the microstructures  820  are closer to the left). As noted above, people with ordinary knowledge in the related art should understand that numbers and position of the light sources, and density of the microstructures  820  could be adjusted accordingly under disclosure described above, and will not be described here. 
     Next, please refer to  FIG.  10   , according to another embodiment of the present invention, a display cover  95  is provided. The display cover  95  is integrally formed in a predetermined shape F, and light sources such as the light sources  410  and  420 , the window pattern  200  and the selectively disposed conductive pattern  300  can be covered by the light conduction layer  600 . For example, the predetermined shape F can be hemispherical or curved, and the structures of the light sources (such as the light sources  410  and  420 ), the window pattern  200  and the selectively disposed conductive pattern  300  could be embedded in the light conduction layer  600 . However, the elements described above are not limitation to the present invention. 
     According to the principles of the present invention which are described above, the display cover  95  could be formed by integrally covering the respective components, thereby achieving effects of lightening, thinning and/or reducing the occupied space. Further, in addition to the rectangle, the display cover plate  95  could also be correspondingly designed to have different predetermined shapes F based on this thinning characteristic. Therefore, an outer surface E, formed in the predetermined shape F, which is disposed on the light transmission layer  100  of the display cover plate  95  which faces away from the light conduction layer  600  is not substantially flat. For example, the mold could be designed that the display cover plate  95  made by injection in the mold could have arbitrary shapes to adapt manufacturing of various structures for lighting, decoration or display. Therefore, according to the embodiments of the present invention, there is no need to provide or reduce the number of components to be assembled and stacked, as long as the light transmission window W in the light transmission layer  100  faces a predetermined direction (for example, it faces observers intended to use the display cover  95 ), the display cover  95  could be made as the predetermined shape F with various changes. As noted above, the display cover made as the predetermined shape according to the present invention is not limited to aspects specifically shown in this specification and the drawings. 
     As noted above, according to the display cover disclosed in the various embodiments of the present invention, overall weight and thickness of the display cover, and space occupied by the display cover could be reduced. Therefore, cost and process of stacking and assembling could also be reduced. Furthermore, since the light source is covered by the light conduction layer or integrated into the light conducting layer, light loss of light emitted by the light source which is resulted from entering the light conducting layer through different media could be reduced or avoided. Therefore, since light is directly incident to the light conductive layer, better emitting efficiency, display brightness and diffusion uniformity could be achieved. Additionally, according to some embodiments of the present invention, a  3 D predetermined shape could also be obtained efficiently. 
     The above descriptions are only for preferred embodiments of the present invention. It should be noted that various changes and modifications could be made without departing from the spirit and principles of the invention. People with ordinary knowledge in the related field should understand that the present invention is defined by the scope of the appended claims, and various possible changes, such as substitution, combination, modification and diversion, are within the scope of the present invention under guidance of the present invention.