The present invention relates to a technique field of liquid crystal display, and more particularly to a polaroid, liquid crystal panel and liquid crystal display apparatus.
A liquid crystal display (LCD) is a thin flat display apparatus which comprises a certain amount of color or monochrome pixels and is disposed before a light source or a reflecting surface. Because the liquid crystal display has low power consumption and is characterized in high display quality, small size and light weight, it is favored by peoples and becomes a main display apparatus. Nowadays, the major one of the liquid crystal display is the thin film transistor (TFT) liquid crystal display.
As the area of the TFT-LCD being enlarged, a viewing angle is increased and therefore the contrast and the definition of the image is decreased. For a vertical alignment (VA) mode liquid crystal panel, the liquid crystal molecules are disposed vertically in a vertically aligned normal black mode such that the VA mode performs well in a dark state and therefore provides very high contrast in a front viewing angle. However, while being observed from side, the contrast decrease of the VA mode liquid crystal panel is obvious, color washout of an image is easily occurred, and obvious color shift phenomenon is generated under different viewing angles.
In view of the insufficient of the conventional technique, the present invention provides a polaroid and liquid crystal panel comprising the polaroid. Through improving the structure of the polaroid, the contrast and definition under large viewing angle is improved to solve the problem of color shift phenomenon in the liquid crystal panel generated under different viewing angles.
In order to achieve the object above, the present invention adopts the technique solution below:
A polaroid comprising a first protecting film, a polarizing film and a second protecting film which are stacked, wherein a rough structure layer and a surface protecting film are sequentially disposed above the second protecting film.
Wherein, the rough structure layer at least comprises a plane and a rough surface, the plane is coupled to the second protecting film, and the rough surface is coupled to the surface protecting film.
Wherein, the rough structure layer at least comprises a plane and a rough surface, the plane is coupled to the surface protecting film, and the rough surface is coupled to the second protecting film.
Wherein, the polaroid further comprises an adhesive layer which coupled to a side of the first protecting film opposite to the polarizing film.
Wherein, a material of the polarizing film is polyvinyl alcohol.
Wherein, a material of the first protecting film and the second protecting film is triacetyl cellulose, and the material of the adhesive layer is pressure sensitive adhesive.
Wherein, a material of the rough structure layer is transparent material; the rough surface is a zigzag structure formed on a surface of the structure layer through a rubbing process, and the zigzag structure is arranged transversely and/or longitudinally to form an array structure; or the rough surface is a bump-like array formed on the surface of the structure layer through an etching process.
The present invention further provides a liquid crystal panel comprising a thin film transistor substrate, a color filter substrate disposed oppositely to the thin film transistor substrate and a liquid crystal layer disposed between the thin film transistor substrate and the color filter substrate, and the thin film transistor substrate being coupled to a first polaroid and the color filter substrate being coupled to a second polaroid, wherein the polaroid described above is adopted to be the second polaroid.
Wherein, the liquid crystal panel is a vertical alignment mode liquid crystal panel.
Another aspect of the present invention is to provide a liquid crystal display apparatus comprising a liquid crystal panel and a backlight module, the liquid crystal panel being disposed oppositely to the backlight module and a display light source being provided to the liquid crystal panel by the backlight module so as to display an image by the liquid crystal panel, wherein the liquid crystal panel described above is adopted to be the liquid crystal panel in the liquid crystal display apparatus.
Compared with the conventional technique, in the embodiment of the present invention, the structure of the polaroid at the light exit surface of the liquid crystal panel is improved by primarily adding a rough structure layer in the polaroid, such that the diffuse reflection of the emitted light is generated after reflecting and refracting the emitted light by the rough structure layer to improve the uniformity of the emitted light, increase the contrast and definition of the liquid crystal panel under large viewing angle, and solves the color shifting problem of the liquid crystal panel occurred under different viewing angles. Specifically, the rough structure layer at least comprises a plane and a rough surface. When the rough surface is disposed toward the liquid crystal layer, the diffuse reflection caused by the rough surface of the polaroid under the situation of a black mode of the liquid crystal panel can be reduced, and the color washout problem of the panel can be avoided.
In order to make the objects, technique solutions and advantages of the present invention be clearer, the present invention will now be described more specifically by referring to the following embodiments with the attached drawings.
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Furthermore, in the embodiment described above, a material of the rough structure layer 6 is a transparent material. The rough surface 6b could be a zigzag structure formed on a surface of the structure layer through a rubbing process, and the zigzag structure could bean array structure arranged transversely and/or longitudinally; or the rough surface 6b could be a bump-like array formed on the surface of the structure layer through an etching process.
Refer to
Furthermore, in the embodiment described above, the material of the polarizing film 1 is polyvinyl alcohol (PVA), and the material of the first protecting film 2 and the second protecting film 3 is triacetyl cellulose (TAC). The TAC protecting films 2 and 3 are primary for protecting the PVA polarizing film 1 in order to improve a mechanical behavior of the PVA polarizing film 1 and prevent the PVA polarizing film 1 from retracting
In summary, in the embodiment of the present invention, the structure of the polaroid at the light exit surface of the liquid crystal panel is improved by primarily adding a rough structure layer in the polaroid, such that the diffuse reflection of the emitted light is generated after reflecting and refracting the emitted light by the rough structure layer to improve the uniformity of the emitted light, increase the contrast and definition of the liquid crystal panel under large viewing angle, and solves the color shifting problem of the liquid crystal panel occurred under different viewing angles. Specifically, the rough structure layer at least comprises a plane and a rough surface. When the rough surface is disposed toward the liquid crystal layer, the diffuse reflection caused by the rough surface of the polaroid under the situation of a black mode of the liquid crystal panel can be reduced, and the color washout problem of the panel can be avoided.
It should be noted that, in the present disclosure, the relative terms such as first and second are only for distinguishing one object or operation from another object or operation, but not for requiring the real relationships or orders between these objects or operations. Furthermore, the terms of “comprising”, “including” or other variations are meant to cover nonexclusive including, such that the processes, methods, objects or equipment including a plurality of elements do not only include these elements but also include other elements which are non-obviously listed, or include the basic elements which have to be existed in the processes, methods, objects or equipment. Under the situation of no more limitations, the processes, methods, objects or equipment including an element limited by the term of “comprising a . . . ” do not exclude the possibility of other existence of the same element therein.
Those described above are the embodiments of the present application. It is noted that various improvements and modifications can be made within the theory of the present application by those with ordinary skill in the technique field, and these improvements and modifications should be included in the protection scope of the present application.
Number | Date | Country | Kind |
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201410614437.4 | Nov 2014 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2014/090671 | 11/10/2014 | WO | 00 |