Patent Publication Number: US-2016231618-A1

Title: Liquid crystal display with separated polarizer device

Description:
FIELD OF TECHNOLOGY 
     The invention relates to a liquid crystal display, and more particularly, to a liquid crystal display with separated polarizer device that facilitates reworking and has high process yield when curved. 
     BACKGROUND 
     In conventional liquid crystal displays, polarizer devices are directly adhered to liquid crystal panels; therefore, when the liquid crystal display undergoes reworking, not only is it time-consuming but the user might also damage the liquid crystal panel. 
     In addition, when manufacturing curved liquid crystal displays, liquid crystal panels with adhered polarizer devices are required to be bent; however, the polarizer device constrains the glass in the liquid crystal panel and thus when bent, the smaller the radius of curvature of the liquid crystal panel, the larger the curvature, and the easier the glass in the liquid crystal panel may fracture due to curvature, which results in decrease in process yield and increase in manufacture costs. 
     Therefore, the development of a liquid crystal display that facilitates reworking and bending so as to increase reworking efficiency and process yield shall be disclosed in the present invention. 
     SUMMARY 
     To solve the above issues of prior art, a purpose of the present invention is to provide a liquid crystal display with separated polarizer device that facilitates reworking. 
     Another purpose of the present invention is to provide a liquid crystal display with separated polarizer device that has high process yield when curved. 
     To achieve the above and other purposes, the present invention provides a liquid crystal display with separated polarizer device, comprising: a frame; a backlight module, deposited in the frame; a liquid crystal panel, deposited in the frame and separated from the backlight module; a transparent substrate, deposited in the frame and separated from the liquid crystal panel; a first polarizer device, deposited on a surface of the backlight module facing the liquid crystal panel; and a second polarizer device, deposited on a surface of the transparent substrate facing the liquid crystal panel. 
     In the liquid crystal display with separated polarizer device, the material of the transparent substrate is glass or polymethylmethacrylate (PMMA). 
     In the liquid crystal display with separated polarizer device, the backlight module, the liquid crystal panel, the transparent substrate, the first polarizer device, and the second polarizer device are curved. 
     In the liquid crystal display with separated polarizer device, the distance between the liquid crystal panel and the backlight module is between 0.1 mm and 50 mm; preferably, the distance between the liquid crystal panel and the backlight module is between 0.1 mm and 10 mm. 
     In the liquid crystal display with separated polarizer device, the distance between the liquid crystal panel and the transparent substrate is between 0.1 mm and 50 mm; preferably, the distance between the liquid crystal panel and the transparent substrate is between 0.1 mm and 10 mm. 
     In summary, the liquid crystal display with separated polarizer device of the present invention facilitates reworking so as to increase reworking efficiency by the above separated arrangement; in addition, the glass in the liquid crystal panel is effectively prevented from being fractured when bent so as to increase process yield. 
    
    
     
       BRIEF DESCRIPTION 
         FIG. 1  is an exploded diagram of a liquid crystal display with separated polarizer device of a first embodiment of the invention; 
         FIG. 2  is a cross-sectional diagram of the liquid crystal display with separated polarizer device of the first embodiment of the invention; 
         FIG. 3  is a cross-sectional diagram of a liquid crystal display with separated polarizer device of a second embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION 
     The purposes, features, and effects of the invention may be more fully understood by the subsequent detailed description and embodiments with references made to the accompanying drawings. 
       FIG. 1  and  FIG. 2  show a first embodiment of a liquid crystal display  100  with separated polarizer device of the invention. The liquid crystal display  100  comprises a frame  10 , a backlight module  20 , a liquid crystal panel  30 , a transparent substrate  40 , a first polarizer device  50 , and a second polarizer device  60 . 
     The backlight module  20  is deposited in the frame  10 ; the liquid crystal panel  30  is deposited in the frame  10  and is separated from the backlight module  20  by a distance P1. Although not shown, it is understood that the liquid crystal panel  30  is similar with conventional liquid crystal panels and comprises a color filter (CF) substrate, a thin-film transistor (TFT) substrate, a liquid crystal layer, a glass substrate, etc. The distance P1 is between 0.1 mm and 50 mm, and preferably between 0.1 mm and 10 mm; the distance P1 influences the display effect of the liquid crystal display  100 . The smaller the distance P1, the more the saved internal space of the liquid crystal display  100 ; in addition, when the distance P1 exceeds 50 mm, the liquid crystal display  100  may still be used but the display effect of the liquid crystal display  100  may be blurred. 
     The transparent substrate  40  is deposited in the frame  10  and is separated from the liquid crystal panel  30  by a distance P2. The material of the transparent substrate is transparent material such as glass, polymethylmethacrylate (PMMA), etc. The distance P2 is between 0.1 mm and 50 mm, and preferably between 0.1 mm and 10 mm; the distance P2 influences the display effect of the liquid crystal display  100 . The smaller the distance P2, the more the saved internal space of the liquid crystal display  100 . Furthermore, the distance P1 and the distance P2 may be adjusted according to requirements and do not have to be exactly the same; in addition, when the distance P2 exceeds 50 mm, the liquid crystal display  100  may still be used but the display effect of the liquid crystal display  100  may be blurred. 
     The first polarizer device  50  is deposited on a surface of the backlight module  20  facing the liquid crystal panel  30 ; the second polarizer device  60  is deposited on a surface of the transparent substrate  40  facing the liquid crystal panel  30 . 
     Therefore, as the first polarizer device  50  and the second polarizer device  60  are separately deposited on the backlight module  20  and the transparent substrate  40 , when reworking the liquid crystal display  100 , the liquid crystal panel  30  does not have to be processed to rapidly remove and replace the first polarizer device  50  and the second polarizer device  60 ; as a result, reworking efficiency may be increased and the liquid crystal panel  30  may not be damaged. 
     Furthermore, as shown in  FIG. 3 , when manufacturing a curved liquid crystal display  200 , as the first polarizer device  50  and the second polarizer device  60  are separately deposited on the backlight module  20  and the transparent substrate  40  after bending, the first polarizer device  50  and the second polarizer device  60  do not affect the liquid crystal panel  30  regardless of the radius of curvature of the liquid crystal panel  30 . Therefore, the liquid crystal panel  30  is prevented from being fractured when bent, so as to effectively increase process yield. 
     In summary, the liquid crystal display with separated polarizer device of the present invention facilitates reworking so as to increase reworking efficiency by the above separated arrangement; in addition, the glass in the liquid crystal panel is effectively prevented from being fractured when bent so as to increase process yield. 
     While the invention has been described by way of example and in terms of the preferred embodiments in above, those skilled in the art should understand that the embodiments only illustrate the invention and are not to be interpreted as limiting the scope of the invention. It should be noted that, the scope of the invention is intended to cover all modifications and replacements equivalent to the embodiments. Therefore, the scope of the invention should be defined by the scope of the appended claims.