Patent Application
20200174310
The subject matter herein generally relates to display devices.
A liquid crystal display device generally includes a backlight module and a display panel stacked on the backlight module. However, light of the backlight module can leak through the joint area where the backlight module and the display panel are joined.
Therefore, there is room for improvement in the art.
Implementations of the present disclosure will now be described, by way of embodiment, with reference to the attached figures.
It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the exemplary embodiments described herein. However, it will be understood by those of ordinary skill in the art that the exemplary embodiments described herein may be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the exemplary embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure.
The term “comprising” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series, and the like. The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references can mean “at least one”. The term “circuit” is defined as an integrated circuit (IC) with a plurality of electrical elements, such as capacitors, resistors, amplifiers, and the like.
As shown in
As shown in
The backlight module 20 may be a direct type backlight module or an edge type backlight module. The backlight module 20 includes a light source (not shown), an optical film group 22, and a back plate 23 (e.g., made of a metal material). The optical film group 22 includes a brightness enhancement film 221, a diffusion sheet 222, a light guide plate 223, and a reflection sheet 224 sequentially stacked as stated in a direction away from the display panel 10. The backlight module 20 defines a mounting hole 24 extending through the backlight module 20 in the light transmission area 103. The mounting hole 24 is circular, and a size of the mounting hole 24 is larger than or substantially equal to a size of the light transmission area 103. The camera 80 is in the mounting hole 24. The back plate 23 is shaped to define an inner wall of the mounting hole 24 extending to abut against a surface of the array substrate 12. Since the camera 80 is in the display area 101, a screen ratio of the liquid crystal display device 100 is greater as compared to conventional art, in which the camera 80 is outside the display area.
As shown in
A junction between the backlight module 20 and the display panel 10, that is to say the junction between the back plate 23 and the array substrate 12, is provided with black foam 50. The black foam 50 is in the shape of a ring to surround the mounting hole 24. The top and bottom sides of the black foam 50 can be attached to the back plate 23 and the array substrate 12 respectively through a double-sided tape 70. In one embodiment, a thickness of the black foam 50 is approximately 0.3 mm when the black foam 50 is uncompressed and is approximately 0.2 mm when the black foam 50 is compressed. In other embodiments, the thickness, compressibility, and other features of the black foam 50 can be selected according to actual needs.
In one embodiment, the black foam 50 has light absorbing property, preventing the light of the backlight module 20 from leaking out from the area where the display panel 10 and the backlight module 20 are combined, thereby solving the light leakage problem. In addition, during mechanical reliability testing after the display panel 10 and the backlight module 20 are assembled, the black foam 50 serves as a link and a buffer preventing separation of the display panel 10 from the backlight module 20 and preventing cracking and failure of the second substrate 121 (which is made of glass). In addition, the black foam 50 is stable, with good appearance, and, with positional precision during manufacture, allows some toleration for dimensional differences of other materials. The foam 50 is also low cost.
It is to be understood, even though information and advantages of the present exemplary embodiments have been set forth in the foregoing description, together with details of the structures and functions of the present exemplary embodiments, the disclosure is illustrative only. Changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the present exemplary embodiments to the full extent indicated by the plain meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | |
|---|---|---|---|
| 62774525 | Dec 2018 | US |
