1. Field of the Invention
The present invention relates to the field of liquid crystal displaying techniques, and in particular to a middle frame and liquid crystal display device.
2. The Related Arts
Referring to
The first support part 121 is disposed on the back plate 11, and the light-guiding plate 14 is disposed above the back plate 11. The light source 13 is disposed on the side of the incident surface 141 of light-guiding plate 14, and the optical film 15 is disposed on the light-emitting surface 142 of light-guiding plate 14. The second support part 122 of the middle frame 12 is located above the optical film 15 and forming a gap 16 with the optical film 15.
To prevent the heat generated by the light source 13 from causing the light-guiding plate 14 to expand and deform to damage the light source 13, the known liquid crystal display device 10 further disposes a gap 17 between the incident surface 141 of light-guiding plate 14 and the light source 13.
However, the light emitted by the light source 3 may radiate in the gap 17 to leak through the gap 16 to cause light leak in liquid crystal display device 10 leading to reducing the display quality of the liquid crystal display device 10
The technical issue to be addressed by the present invention is to provide a middle frame and liquid crystal display device, able to improve the light leak problem of the liquid crystal display device so as to improve the display quality of liquid crystal display device.
The present invention provides a middle frame, which comprises; a first support part and a second support part, the second support part being disposed perpendicularly to a top surface of the first support part, wherein the first support part further comprising a bottom surface, disposed oppositely to the top surface, wherein the bottom surface comprising a slant part, extending slantly from the bottom surface towards the top surface; wherein the first support part further comprising at least a side wall connecting the top surface and the bottom surface, the bottom surface comprising a level part parallel to the top surface; the slant part comprising a first end and a second end, the first end being connected to the level part and the second end being connected to the side wall, the slant part having a height of H and H satisfying the following equation: H=H1−H2, wherein H1 being a vertical distance from the top surface of the first support part to the first end of the slant part, and H2 being a vertical distance from the top surface of the first support part to the second end of the slant part; the H being less than 0.2 mm and the tilt angle of the slant part being less than 5°, wherein the tilt angle being the angle between the slant part and the horizontal level.
The present invention provides a middle frame, which comprises: a first support part and a second support part, the second support part being disposed perpendicularly to a top surface of the first support part, wherein the first support part further comprising a bottom surface, disposed oppositely to the top surface, wherein the bottom surface comprising a slant part, extending slantly from the bottom surface towards the top surface.
According to a preferred embodiment of the present invention, the first support part further comprises at least a side wall connecting the top surface and the bottom surface; the bottom surface comprises a level part parallel to the top surface; the slant part comprises a first end and a second end, the first end being connected to the level part and the second end being connected to the side wall, the slant part having a height of H and H satisfying the following equation: H=H1−H2, wherein H1 being a vertical distance from the top surface of the first support part to the first end of the slant part, and H2 being a vertical distance from the top surface of the first support part to the second end of the slant part.
According to a preferred embodiment of the present invention, the H is less than 0.2 mm and the tilt angle of the slant part is less than 5°, wherein the tilt angle is the angle between the slant part and the horizontal level.
According to a preferred embodiment of the present invention, the first support part further comprises a first side wall and a second side wall, disposed in parallel and connecting the top surface and the bottom surface; the slant part comprises a first end and a second end, the first end being connected to the first side wall and the second end being connected to the second side wall, the slant part having a height of H and H satisfying the following equation: H=H1−H2, wherein H1 being a vertical distance from the top surface of the first support part to the first end of the slant part, and H2 being a vertical distance from the top surface of the first support part to the second end of the slant part.
According to a preferred embodiment of the present invention, the H is less than 0.2 mm and the tilt angle of the slant part is less than 5°, wherein the tilt angle is the angle between the slant part and the horizontal level.
The present invention provides a liquid crystal display device, which comprises: a front frame; a back plate, forming an accommodation space with the front frame; a light-guiding plate, disposed on the back plate, the light-guiding plate comprising an incident surface and a light-emitting surface; an optical film, disposed on the light-emitting surface of the light-guiding plate; wherein the liquid crystal display device further comprising a middle frame, the middle frame comprising a first support part and a second support part, the second support part being disposed perpendicularly to a top surface of the first support part, wherein the first support part further comprising a bottom surface, disposed oppositely to the top surface, wherein the bottom surface comprising a slant part, extending slantly from the bottom surface towards the top surface; the first support part of the middle frame being disposed on the back plate and the second support part of the middle frame being disposed above the optical film so that the second support part pressing firmly against the optical film when the slant part of the first support part clinging to the back plate.
According to a preferred embodiment of the present invention, the first support part further comprises at least a side wall connecting the top surface and the bottom surface; the bottom surface comprises a level part parallel to the top surface; the slant part comprises a first end and a second end, the first end being connected to the level part and the second end being connected to the side wall, the slant part having a height of H and H satisfying the following equation: H=H1−H2, wherein H1 being a vertical distance from the top surface of the first support part to the first end of the slant part, and H2 being a vertical distance from the top surface of the first support part to the second end of the slant part.
According to a preferred embodiment of the present invention, the H is less than 0.2 mm and the tilt angle of the slant part is less than 5°, wherein the tilt angle is the angle between the slant part and the horizontal level.
According to a preferred embodiment of the present invention, the level distance from the first end of the slant part to the incident surface of the light-guiding plate is greater than the level distance from the second end of the slant part to the incident surface of the light-guiding plate.
According to a preferred embodiment of the present invention, the accommodation space has a height of H3, wherein. H1 is greater than H2 and H2 is greater than H3.
According to a preferred embodiment of the present invention, the first support part further comprises a first side wall and a second side wall, disposed in parallel and connecting the top surface and the bottom surface; the slant part comprises a first end and a second end, the first end being connected to the first side wall and the second end being connected to the second side wall, the slant part having a height of H and H satisfying the following equation: H=H1−H2, wherein H1 being a vertical distance from the top surface of the first support part to the first end of the slant part, and H2 being a vertical distance from the top surface of the first support part to the second end of the slant part.
According to a preferred embodiment of the present invention, the H is less than 0.2 mm and the tilt angle of the slant part is less than 5°, wherein the tilt angle is the angle between the slant part and the horizontal level.
According to a preferred embodiment of the present invention, the level distance from the first end of the slant part to the incident surface of the light-guiding plate is greater than the level distance from the second end of the slant part to the incident surface of the light-guiding plate.
According to a preferred embodiment of the present invention, the accommodation space has a height of H3, wherein H1 is greater than H2 and H2 is greater than H3.
The efficacy of the present invention is that to be distinguished from the state of the art. The present invention disposes the bottom surface of the first support part of the middle frame comprising a slant part extending from the bottom surface towards the top surface of the middle frame so that the first support part will slant due to the extrusion during assembling the liquid crystal display device, which leads to the slanting of the second support part. When the slant part of the bottom surface clings to the back plate, the second support part of the middle frame presses firmly against the optical film to prevent the light of the light source from light leak through between the optical film and the second support part. As such, the light leak problem in the liquid crystal display device is improved and the display quality if also improved.
To make the technical solution of the embodiments according to the present invention, a brief description of the drawings that are necessary for the illustration of the embodiments will be given as follows. Apparently, the drawings described below show only example embodiments of the present invention and for those having ordinary skills in the art, other drawings may be easily obtained from these drawings without paying any creative effort. In the drawings:
Referring to
In the instant embodiment, the front frame 21 and the back plate 22 form an accommodation space 26, for housing fixing and protecting different internal elements of the liquid crystal display device 20.
The light-guiding plate 23 is disposed on the back plate 22. The light-guiding plate 23 comprises an incident surface 231 and a light-emitting surface 232. The optical film 24 is disposed on the light-emitting surface 232 of the light-guiding plate 23 for making the emitted light from the light-guiding plate 23 uniform.
The middle frame 25 is disposed on the back plate 22, wherein the specific structure of the middle frame 25 refers to
As shown in
Specifically, the first support part 251 further comprises a first side wall 258 and a second side wall 259, disposed in parallel and connecting the top surface 253 and the bottom surface 254. The slant part 255 comprises a first end 256 and a second end 257. The first end 256 is connected to the first side wall 258 and the second end 257 is connected to the second side wall 259. The height H of the slant part 255 satisfies the following equation:
H=H1−H2
wherein H1 is a vertical distance from the top surface 253 of the first support part 251 to the first end 256 of the slant part 255, and H2 is a vertical distance from the top surface 253 of the first support part 251 to the second end 257 of the slant part 255. In the instant embodiment, the H of the slant part 255 is preferably less than 0.2 mm and the tilt angle of the slant part 255 is preferably less than 5°, wherein the tilt angle is the angle between the slant part 255 and the horizontal level.
In the instant embodiment, the level distance D1 from the first end 256 of the slant part 255 to the incident surface 231 of the light-guiding plate 23 is greater than the level distance D2 from the second end 257 of the slant part to 255 the incident surface 231 of the light-guiding plate 23.
Furthermore, referring to
In the instant embodiment, the second support part 252 extends towards the light source 28 correspondingly along the gap 211 and a reflector element 213 is disposed on the extended part of the second support part 252. The reflector element 213 can reflect the light from the light source 28 back to the light-guiding plate 23 to improve the light utilization. Furthermore, the reflector element 213 is located closer to the light source 28 to reduce the transmission path of the light so as to reduce the light loss.
Compared to the known technique, the present invention disposes the bottom surface of the first support part 251 as a slant part structure so that the first support part 251 will slant due to the extrusion during assembling the liquid crystal display device 20, which leads to the slanting of the second support part 252 to press firmly against the optical film 24. As such, the light leak problem in the liquid crystal display device 20 is improved and the display quality if also improved.
Referring to
Specifically, the first support part 351 comprises at least a side wall 359 connecting the top surface 353 and the bottom surface 354. The bottom surface 354 comprises a level part 350 parallel to the top surface 353, and a slant part 355 connected to the level part 350. The slant part 355 comprises a first end 356 and a second end 357. The first end 356 is connected to the level part 350 and the second end 357 is connected to the side wall 359.
Similarly, the first support part 351 of the present embodiment will slant due to the extrusion during assembling the liquid crystal display device, which leads to the slanting of the second support part 352 to press firmly against the optical film. As such, the light leak problem in the liquid crystal display device is improved and the display quality if also improved.
In summary, through disposing the bottom surface of the first support part as a slant part extending from the bottom surface towards the top surface so that the first support part will slant due to the extrusion during assembling the liquid crystal display device, which leads to the slanting of the second support part. When the slant part of the bottom surface clings to the back plate, the second support part of the middle frame presses firmly against the optical film. As such, the light leak problem in the liquid crystal display device is improved and the display quality if also improved.
Embodiments of the present invention have been described, but not intending to impose any unduly constraint to the appended claims. Any modification of equivalent structure or equivalent process made according to the disclosure and drawings of the present invention, or any application thereof, directly or indirectly, to other related fields of technique, is considered encompassed in the scope of protection defined by the claims of the present invention.
Number | Date | Country | Kind |
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201210478854.1 | Nov 2012 | CN | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/CN12/85725 | 12/3/2012 | WO | 00 | 12/5/2012 |