Patent Publication Number: US-2018045911-A1

Title: Electronic device and display component thereof

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     The present application is a Section 371 U.S. National Stage Application of International Application No. PCT/CN2015/078149, filed on Apr. 30, 2015, the content of which is incorporated herein by reference in its entirety, and published as WO2016/172987 A1 on Nov. 3, 2016, not in English. 
    
    
     FIELD 
     The present disclosure relates to an adjustment mechanism, and particularly to an adjustable display component and an electronic device having the display component. 
     BACKGROUND 
     At present, a near-to-eye display device, such as a head mounted display (HMD) and the like, becomes more and more popular. The working principle of the near-to-eye display device is to enlarge an image in a super-micro display screen by means of a group of precise optical lens, and to project the image to eyes, so that a wearer may view an enlarged virtual image, which is similar to an enlarged virtual image presented by viewing an object via a magnifying glass. In order to be suitable for pupillary distances of different wearers, most HMDs in the market at present have an adjustment function of pupillary distance. However, few HMDs have an adjustment function of diopter, which is suitable for a myopic or hyperopic wearer. 
     SUMMARY 
     Embodiments of the present disclosure provide a display component which may adjust a pupillary distance and a diopter, and an electronic device having the display component. 
     The display component includes: two optical units; a first adjustment mechanism connected to the two optical units and configured to adjust a distance between the two optical units; two image generation devices, each of the two image generation devices movably connecting to one of the two optical units corresponding to the image generation device, and an image generated by each of the two image generation devices being projected by the corresponding optical unit in a predetermined direction; and two second adjustment mechanisms, each of the two second adjustment mechanisms connecting to one of the two image generation devices corresponding to the second adjustment mechanism and configured to adjust a distance between the corresponding image generation device and the optical unit corresponding to the image generation device. 
     The electronic device includes a housing and the above display component accommodated in the housing, in which at least one part of the first adjustment mechanism and at least one part of the second adjustment mechanisms are exposed out of the housing. 
     The first adjustment mechanism in the present disclosure may adjust the distance between the optical units, thus realizing an adjustment of the pupillary distance. The second adjustment mechanism may adjust the distance between the image generation device and the optical unit corresponding to the image generation device, thus realizing an adjustment of the diopter. Accordingly, the display component and the electronic device in the present disclosure may adjust both the pupillary distance and the diopter, thus being suitable for more users. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The following accompanying drawings are used for illustrating various embodiments of the present disclosure in detail in combination with specific embodiments. It should be understood that various elements illustrated in the accompanying drawings do not represent actual sizes and scale relations, and the accompanying drawings are only schematic views intended for clear illustration. Thus, the accompanying drawings should not be construed to limit the present disclosure. 
         FIG. 1  is a schematic view of a wearable electronic device provided in an embodiment of the present disclosure. 
         FIG. 2  is a schematic view of a display component of the wearable electronic device in  FIG. 1 . 
         FIG. 3  is a side schematic view of a second stud and a second crown gear of the display component in  FIG. 2 . 
         FIG. 4  is a schematic view of the display component in  FIG. 2 , in which the display component is in another state. 
     
    
    
     DETAILED DESCRIPTION 
     In order to make the objectives, technical solutions and advantages of the present disclosure more definite and clear, the present disclosure is further illustrated in detail in combination with a plurality of embodiments and accompanying drawings. It should be understood that, the specific embodiments described herein are only used for explaining the present disclosure and not for limiting the present disclosure. It must be noted that, the “connection” between two elements mentioned in the present disclosure does not necessarily refer to a direct connection, it may be an indirect connection achieved through a third element. 
     In combination with  FIG. 1  and  FIG. 2 , which are schematic views of a wearable electronic device  8  provided in an embodiment of the present disclosure. The electronic device  8  may be a wearable video player, a wearable game device or a wearable navigation device, and so on. The electronic device  8  includes a headphone  10  and a display assembly  11  rotatably connected to the headphone  10 . The display assembly  11  includes a housing  12  and a display component  20  accommodated in the housing  12 . Certainly, the display assembly  11  further includes related circuits, batteries and etc., which are not illustrated in the drawings. The display component  20  includes two optical units  30 , two image generation devices  40 , one first adjustment mechanism  50  and two second adjustment mechanisms  60 . At least part of the first adjustment mechanism  50  and at least part of the second adjustment mechanisms  60  are exposed out of the housing  12  so that it is convenient for a user to adjust. 
     The optical unit  30  includes a lens barrel  32  and a plurality of lens sets  34  disposed in the lens barrel  32 . The lens barrel  32  has an entrance port (not illustrated in the drawings) and an exit port  38 . The entrance port is located at a side facing the image generation device  40 . Light passing through the entrance port enters the lens sets  34  to be refracted and reflected, and is finally emitted out from the exit port  38 . The image generation device  40  includes a base  42  and a micro display unit  44  disposed to the base  42 . The micro display unit  44  has a micro displayer (not illustrated in the drawings), for example an OLED micro displayer, and is disposed to the entrance port. Accordingly, light of an image displayed in the micro displayer enters the entrance port and is projected by the lens sets  34  in a predetermined direction. An enlarged virtual image of the image displayed in the micro displayer is visible to human eyes when the light emitted out from the exit port  38  enters the human eyes. 
     The first adjustment mechanism  50  is connected to the two optical units  30  and is configured to adjust a distance between the two optical units  30 . Specifically, the first adjustment mechanism  50  includes two first threaded holes  51  formed in the two optical units  30 , one first stud  52  screwed to the two first threaded holes  51 , and one first rotary assembly  53  connected to the first stud  52 . In the embodiment, the first threaded hole  51  is formed at an end of a connecting sheet  31  far away from the lens barrel  32 , wherein the connecting sheet  31  is secured to the lens barrel  32 . The connecting sheet  31  may have certain elasticity, thus serving to absorb a part of vibration of the first rotary assembly  53  in a rotation process of the first rotary assembly  53 . However, it may be understood that, the first threaded hole  51  may be directly formed in the lens barrel  32 . Two opposite sides of the first stud  52  are provided with threads which are opposite to each other, so that the two connecting sheets  31  will get close to each other or move away from each other when the first stud  52  rotates. 
     The first rotary assembly  53  is configured to drive the first stud  52  to rotate in two opposite directions so as to adjust the distance between the two optical units  30 . Specifically, in the embodiment, the first rotary assembly  53  includes one first crown gear  54  configured to rotate coaxially and synchronously with the first stud  52  and one first straight gear  55  coupled to the first crown gear  54 . The first straight gear  55  partially extends out of the housing  12 , i.e. exposed out of the housing  12 , so that it is convenient for the user to adjust. Accordingly, by rotating the first straight gear  55 , the first stud  52  may be rotated. As an illustrative embodiment, when the first straight gear  55  is rotated in a first rotation direction, the first stud  52  is driven to rotate in a first direction, so that the two optical units  30  are driven to get close to each other. When the first straight gear  55  is rotated in a second rotation direction which is opposite to the first rotation direction, the first stud  52  is driven to rotate in a second direction which is opposite to the first direction, so that the two optical units  30  are driven to move away from each other. Thus, the distance between the two optical units  30  may be adjusted, i.e. a pupillary distance may be adjusted. However, it may be understood that, the first rotary assembly  53  is not limited to the structure illustrated in the drawings. For example, the first rotary assembly  53  may be a paddle (not illustrated in the drawings) fixed to the first stud  52  and extending outwards along a direction perpendicular to the first stud  52 , and the above function may be implemented by shifting the paddle. Or, the first rotary assembly  53  may only include the first crown gear  54 . 
     In combination with  FIG. 2  and  FIG. 3 , the second adjustment mechanism  60  is connected to one image generation device  40  corresponding to the second adjustment mechanism  60  and configured to adjust a distance between the corresponding image generation device  40  and the optical unit  30  corresponding to the image generation device  40 . Specifically, the second adjustment mechanism  60  includes one second threaded hole  61  formed in the image generation device  40 , one second stud  62  screwed to the second threaded hole  61 , and one second rotary assembly  63  connected to the second stud  62 . In the embodiment, the second threaded hole  61  is formed in the base  42  of the image generation device  40 , the second stud  62  defines an axis (not marked in the drawings) and includes a first segment  64  provided with threads and coupled to the second threaded hole  61 , and a second segment  65  opposite to the first segment  64 . The second segment  65  has a substantially D-shaped section along a direction perpendicular to the axis, and the second rotary assembly  63  sets a D-shaped through hole  68  matched with the section of the second segment in shape. The second segment  65  passes through the through hole  68  and is configured to move in the through hole  68  along a direction of the axis. In the present embodiment, the second rotary assembly  63  specifically includes one second crown gear  66  provided with the through hole  68  and one second straight gear  67  coupled to the second crown gear  66 . The second straight gear  67  partially extends out of the housing  12 , i.e. exposed out of the housing  12 , so that it is convenient for the user to adjust. 
     Accordingly, by rotating the second straight gear  67 , the second stud  62  may be rotated, so that the distance between the image generation device  40  and the optical unit  30  corresponding to the image generation device  40 , i.e. a diopter, may be adjusted, as illustrated in  FIG. 2  and  FIG. 4 . When it is needed to adjust the pupillary distance instead of the diopter, the image generation device  40  may move along with the optical unit  30 . As the second stud  62  is configured to move axially in the through hole  68 , the second stud  62  may also move along with the image generation device  40 . Accordingly, the second straight gear  67  may have a fixed position, just like the first straight gear  55 . Certainly, in other embodiments, the second stud  62  may not be configured to move in the through hole  68 , in which case a space is required to be reserved for the second crown gear  66  and the second straight gear  67  to move therein. 
     It should be understood that, the second rotary assembly  63  is not limited to the structure illustrated in the drawings. For example, the second rotary assembly  63  may also be a paddle (not illustrated in the drawings) fixed to the second stud  62  and extending outwards along a direction perpendicular to the second stud  62 , and the above function may be implemented by shifting the paddle. Or, the second rotary assembly  63  may only include the second crown gear  66 . In addition, the D-shaped section of the second segment  65  of the second stud  62  is intended to allow the second crown gear  66  to drive the second stud  62  to rotate, and thus, it may be understood that the section may have a non-circular shape, but not limited to a D shape, as long as the above function can be realized. 
     Preferably, the display component  20  further includes two guiding rails  70  (one guiding rail in  FIG. 2  is illustrated with dashed lines) disposed at two opposite sides of the optical unit  30  respectively. Two accommodating holes  72  are provided at two opposite sides of the lens barrel  32  of the optical unit  30  respectively, and two accommodating holes  72  are also provided at two opposite sides of the base  42  of the image generation device  40  respectively. In the present embodiment, the guiding rail  70  is column-shaped and movably passes through the accommodating holes  72  of the lens barrel  32  and the accommodating holes  72  of the base  42 . Accordingly, the two optical units  30  may move along the guiding rails  70  under the adjustment of the first adjustment mechanism  50 , and the two image generation devices  40  may move along the guiding rails  70  under the adjustments of the second adjustment mechanisms  60 . 
     In the present embodiment, the lens barrel  32  and the base  42  are fitted over to the same guiding rails  70 . However, it may be understood that, in order to implement a guiding function, the lens barrel  32  and the base  42  both may have their respective guiding rails. In addition, the guiding rail is not limited to the structure illustrated in the drawings. For example, the guiding rail may be a groove (not illustrated in the drawings) formed in the housing  12 , and the lens barrel  32  and the base  42  may be accommodated in the groove and configured to move in the groove along a direction defined by the groove. In summary, it is only needed that the guiding rail can play a guiding function. 
     The above descriptions are only preferable embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equal alternatives, and improvements made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.