Patent Publication Number: US-2015077682-A1

Title: Display device and display wall having alignment unit, method for assembling same

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a display device and a display wall including a number of the display devices. 
     2. Description of Related Art 
     A display wall includes a number of display devices arranged in an array. Yet, a display device may be mislocated or tilted relative to other display device and making a bad display effect. 
     Therefore, it is desirable to provide a display device, a display wall, and a method for manufacturing the display wall which can overbecome the shortcomings mentioned above. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is a schematic, front view of a display device according to a first embodiment of the present disclosure. 
         FIG. 2  is a cross-sectional view taken along II-II line of the display device of 
         FIG. 1 . 
         FIG. 3  is a schematic, front view of a display wall according to a second embodiment of the present disclosure. 
         FIG. 4  is a schematic view showing a method for assembling the display wall of  FIG. 3 . 
         FIG. 5  is a cross-sectional view taken along V-V line of  FIG. 4 . 
     
    
    
     DETAILED DESCRIPTION 
       FIGS. 1 and 2  show a display device  10  according to a first embodiment of the present disclosure. In this embodiment, the display device  10  is a liquid crystal display device. In other embodiments, the display device  10  can also be any known type of display device, such as a plasma display device, for example. 
     The display device  10  includes a housing  11  and a display panel  13  mounted in the housing  11 . The housing  11  includes four sidewalls  110  perpendicularly connected end to end. The four sidewalls  110  include two pair of sidewalls. Each pair of sidewalls  110  includes two opposite sidewalls identical to each other in size and are parallel to each other. The sidewalls  110  surround the display panel  13  and have small widths. In this embodiment, the width of the sidewall  110  is smaller than  5  millimeters. 
     The display device  10  further includes aligning units  15  received in the housing  11 . In this embodiment, there are four aligning units  15 . Each two aligning units  15  correspond to a pair of sidewalls  110 . Each aligning unit  15  includes an optical fiber  150  and two collimating lenses  152  aligned with two ends  151  of the optical fiber  150 . Each collimating lens  152  is formed on a substrate  153 . In this embodiment, the collimating lens  152  is a convex lens. The collimating lens  152  and the substrate are transparent. The four sidewalls  110  define eight light holes  111 . The eight light holes  111  include four pair of light holes. Each pair of light holes  111  corresponds to one aligning unit  15  and is defined in the corresponding pair of sidewalls  110 . Each sidewall  110  defines two light holes  111  adjacent to two ends of the sidewall  110 . A location of the light hole  111  in one sidewall  110  corresponds to a location of the light hole  111  in the opposite sidewall  110 . The collimating lens  152  is arranged between the end  151  of the optical fiber  150  and the corresponding light hole  111  and is aligned with the light hole  111 . 
       FIG. 3  shows a display wall  100  according to a second embodiment of the present disclosure. The display wall  100  includes a number of display device  10  arranged in an array. 
       FIGS. 4 and 5  show a method for assembling the display wall  100 . First, two display devices  10  are assembled together and are roughly aligned with each other. Then two light sources  20  are aligned with two light holes  111  in the sidewall  110  of one display device  10  opposite to the other display device  10 , and two photo sensors  30  are aligned with two light holes  111  in the sidewall  110  of the other display device  10  opposite to the one display device  10 . In this embodiment, the light sources  20  are laser sources. Light emitted by the light sources  20  transmits through the light holes  111 , the collimating lenses  152 , the optical fibers  150 , and are received by the photo sensors  30 . Finally, a location of the other display  10  relative to the one display  10  is adjusted until a light intensity detected by the photo sensors  30  becomes a biggest value. In this way, the two display devices  10  are precisely aligned with each other. Then the above mentioned steps can be repeated until all of the display devices  10  are assembled together. 
     In detail, the step of adjusting location of the other display  10  relative to the one display  10  until a light intensity detected by the photo sensors  30  becomes a biggest value includes the following sub-steps. 
     The one display device  10  is fixed, and a location of the other display device  10  along a direction parallel to the two adjacent sidewalls  10  of the two display devices  10  is adjusted until a light intensity detected by one photo sensor  30  becomes a biggest value. In this way, a mislocation of the other display device  10  relative to the one display device  10  is eliminated or at least reduced. Then the one display device  10  and one end of the other display device  10  adjacent to the one photo sensor  30  are fixed, and a location of the other end of the other display device  10  is adjusted until a light intensity detected by the other photo sensor  30  becomes a biggest value. In this way, a tilt of the other display device  10  relative to the one display device  10  is eliminated or at least reduced. 
     The display devices are precisely aligned by using the aligning units, in this way, a display effect of the display wall is improved. 
     It will be understood that the above particular embodiments are shown and described by way of illustration only. The principles and the features of the present disclosure may be employed in various and numerous embodiments thereof without departing from the scope of the disclosure. The above-described embodiments illustrate the scope of the disclosure but do not restrict the scope of the disclosure.