Display back frame and liquid crystal display device

The present invention provides a display back frame and liquid crystal display device. Display back frame includes a plurality of splicing elements spliced together, with at least a part of splicing elements connected through rotation mechanism. Splicing element includes main part and stop wall. The stop wall includes bottom part, side wall and top part. Bottom part and outer edge of the main part is connected levelly. Top part is disposed in parallel with the bottom part with a spacing gap. Side wall is disposed between top part and bottom part. Surface of the main part facing the top part has a first bump. As such, through the above disposition, the present invention can reduce required space during storage and transport to improve transport and storage efficiency, and save the use of mold frame to simplify assembly and improve assembly efficiency to reduce cost.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to the field of displaying techniques, and in particular to a display back frame and liquid crystal display device.

2. The Related Arts

The known liquid crystal display device usually comprises mold frame, back frame, liquid crystal panel, optical film and light-guiding plate (LGP).

Among the components, the mold frame and back frame of the liquid crystal display panel are mainly for fixing optical components, such as, light source, light-guiding plate and optical film and for carrying liquid crystal panel.

However, the known back frame of liquid crystal display device is usually made of a monolithic structure, manufactured by metal stamping or plastic inject molding techniques so that the back frame is usually heavier in weight. In addition, a large-sized back frame usually requires larger stamping equipments and larger molds with complex structure, thus, a higher cost. Furthermore, the monolithically structured back frame requires more storage and transport cost and results in less efficiency in storage in transport.

Even further, when fixing optical components, such as, light source, light-guiding plate and optical film and for carrying liquid crystal panel, the back frame must be used with mold frame so that the liquid crystal display device has a higher cost as well as more assembly time leading to reduced efficiency.

SUMMARY OF THE INVENTION

The technical issue to be addressed by the present invention is to provide a display back frame and liquid crystal display device, which reduce required space during storage and transport to improve transport and storage efficiency to as well as save the use of mold frame to reduce cost.

The present invention provides a display back frame, which comprises: a plurality of splicing elements spliced together, at least a part of splicing elements being connected through rotation mechanism so that the display back frame able to switch between a normal usage state and a folded state, the display back frame in the folded state being smaller in size than in the normal usage state, wherein the splicing element comprising main part and stop wall, the stop wall comprising bottom part, side wall and top part, the bottom part and outer edge of the main part being connected levelly, the top part disposed in parallel with the bottom part with a spacing gap, the side wall being disposed between the top part and the bottom part, surface of the main part facing the top part being disposed with a first bump and a second bump, wherein height of the first bump being higher than height of the second bump.

According to a preferred embodiment of the present invention, in the normal usage state, the plurality of splicing elements comprise: a first support frame and a second support frame disposed in parallel; a third support frame and a fourth support frame disposed in parallel; the third support frame connected perpendicularly respectively to one end of each of the first support frame and the second support frame; and the fourth support frame connected perpendicularly respectively to the other end of each of the first support frame and the second support frame.

The present invention provides a display back frame, which comprises: a plurality of splicing elements spliced together, at least a part of splicing elements being connected through rotation mechanism so that the display back frame able to switch between a normal usage state and a folded state, the display back frame in the folded state being smaller in size than in the normal usage state, wherein the splicing element comprising main part and stop wall, the stop wall comprising bottom part, side wall and top part, the bottom part and outer edge of the main part being connected levelly, the top part disposed in parallel with the bottom part with a spacing gap, the side wall being disposed between the top part and the bottom part, surface of the main part facing the top part being disposed with a first bump.

According to a preferred embodiment of the present invention, the surface of the main part facing the top part is also disposed with a second bump, wherein height of the first bump is higher than height of the second bump.

According to a preferred embodiment of the present invention, in the normal usage state, the plurality of splicing elements comprise: a first support frame and a second support frame disposed in parallel; a third support frame and a fourth support frame disposed in parallel; the third support frame connected perpendicularly respectively to one end of each of the first support frame and the second support frame; and the fourth support frame connected perpendicularly respectively to the other end of each of the first support frame and the second support frame; a plurality of auxiliary support frames are disposed between the first support frame and the second support frame, with both ends of each of the auxiliary support frames connected respectively to the first support frame and the second support frame.

According to a preferred embodiment of the present invention, the first support frame comprises a first main part and a first extension part extending from one end of the first main part; the second support frame comprises a second main part and a second extension part extending from one end of the second main part; the first extension part and one end of the third support frame, the other end of the third support frame and one end of the second main part away from the second extension part, the second extension part and one end of the fourth support frame, the other end of the fourth support frame and one end of the first main part away from the first extension part are all connected respectively through the rotation mechanism.

According to a preferred embodiment of the present invention, in the folded state, the first main part is connected levelly to the fourth support frame and is located between the first extension part and the second extension part; the second main part is connected levelly to the third support frame and is located between the first extension part and the second extension part; wherein the total length of first main part levelly connected to the fourth support frame is equal to the total length of second main part levelly connected to the third support frame.

The present invention provides a liquid crystal display device, which comprises: a display back frame, formed by splicing a plurality of splicing elements together, at least a part of splicing elements being connected through rotation mechanism so that the display back frame able to switch between a normal usage state and a folded state, the display back frame in the folded state being smaller in size than in the normal usage state, wherein the splicing element comprising main part and stop wall, the stop wall comprising bottom part, side wall and top part, the bottom part and outer edge of the main part being connected levelly, the top part disposed in parallel with the bottom part with a spacing gap, the side wall being disposed between the top part and the bottom part, surface of the main part facing the top part being disposed with a first bump; light-guiding plate, disposed inside the display back frame, comprising a light entering surface and a light exiting surface; optical film; disposed on the light-guiding plate; light source, disposed on side wall of the display back frame facing the light entering surface of light-guiding plate; liquid crystal panel, disposed on the top part of the back frame of liquid crystal display device; and front frame, assembled with the display back frame, for sandwiching liquid crystal panel firmly between the front frame and the display back frame.

The efficacy of the present invention is that to be distinguished from the state of the art. The display back frame of the present invention can switch between a normal usage state and a folded state with the display back frame in the folded state being smaller in size than in the normal usage state, as well as uses stop wall and first bump to fix and support light-guiding plate, optical film and liquid crystal panel. As such, through the above disposition, the present invention can reduce required space during storage and transport to improve transport and storage efficiency, as well as save the use of mold frame to simplify assembly and improve assembly efficiency to reduce cost.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring toFIGS. 1-3,FIG. 1is a top view showing the structure of the first embodiment of the display back frame in normal usage state according to the present invention;FIG. 2is a schematic view showing the structure of the main splicing element according to the present invention; andFIG. 3is a schematic view showing the three-dimensional structure of the main splicing element ofFIG. 2. As shown inFIG. 1, a display back frame comprises first main splicing elements110,130, second main splicing elements120,140, a plurality of rotation mechanisms150and a plurality of position-stopping mechanisms160.

In the instant embodiment, each of first main splicing elements110,130and second main splicing elements120,140comprises main part and stop wall, with specific structure shown inFIG. 2. As shown inFIG. 2, a main splicing element comprises a main part101and a stop wall102, wherein stop wall comprises a bottom part103, a side wall104and a top part105. Bottom part103and outer edge of main part101are connected levelly. Top part103is disposed in parallel with bottom part103with a spacing gap. Side wall104is disposed between top part103and bottom part105. Therefore, bottom part103, side wall104and bottom part105form a U-shaped structure, with opening of U-shape facing main part101.

Refer toFIGS. 2 and 3. In the instant embodiment, a surface of main part101facing top part105of stop wall102is disposed with a first bump106(as shown inFIG. 2andFIG. 3). Preferably, first bump106is disposed at both end of main part101for supporting four corners of light-guiding plate and optical film when assembling the light-guiding plate and optical film. The surface of main part101facing top part105of stop wall102is further disposed with a second bump107(as shown inFIG. 3), wherein second bump107is connected to first bump106, and height of the first bump106is higher than height of the second bump107.

Refer toFIG. 1again. First main splicing elements110,130and second main splicing elements120,140having main parts and stop walls are spliced to form an outer frame of the back plate. The outer frame of the display back frame in a normal usage state is a rectangular structure. Specifically, first main splicing elements110,130are disposed in parallel, and second main splicing elements120,140are disposed in parallel. Two ends of first main splicing elements110,130are connected to one end of second main splicing elements120,140through rotation mechanism150so that adjacent first main splicing elements110,130and second main splicing elements120,140can rotate with rotation mechanism150as axis so that the display back frame can switch between the normal usage state and the folded state.

At the junction points between first main splicing elements110,130and second main splicing elements120,140are disposed with position-stopping mechanisms160so as to fasten first main splicing elements110,130and second main splicing elements120,140in the normal usage state. In the instant embodiment, position-stopping mechanisms160are disposed at the junction points between first main splicing elements110,130and second main splicing elements120,140to provide better fastening to first main splicing elements110,130and second main splicing elements120,140. In other embodiments, to save cost or reduce complexity, position-stopping mechanisms160can also be disposed at one or more locations for fastening element. In the instant embodiment, rotation mechanism150and position-stopping mechanism160can be screw, rivet, bolt or any other equivalent fastening element.

Referring toFIG. 4,FIG. 4is a top view showing the structure of the first embodiment of the display back frame in folded state according to the present invention. Compared toFIG. 1, when switching from normal usage state to folded state, position-stopping mechanisms160of the display back frame are removed so that first main splicing elements110,130and second main splicing elements120,140can rotate around rotation mechanism150, respectively. As such, the outer frame of the display back frame changes from a rectangle to a parallelogram, so that the display back frame in folded state occupies a smaller space than in normal usage state.

Referring toFIG. 5andFIG. 6,FIG. 5is a top view showing the structure of the second embodiment of the display back frame in normal usage state according to the present invention; andFIG. 6is a top view showing the structure of the second embodiment of the display back frame in folded state according to the present invention. Compared to the first embodiment, first main splicing elements110,130are disposed in parallel, and second main splicing elements120,140are disposed in parallel in this embodiment, too. The difference between this embodiment and the first embodiment is that the display back frame further comprises first auxiliary splicing elements210,220and second auxiliary splicing element230, wherein first auxiliary splicing elements210,220are in parallel with second main splicing elements120,140, and second auxiliary splicing element230is in parallel with first main splicing elements110,130.

In the instant embodiment, two ends of first auxiliary splicing elements210,220are respectively connected to two first main splicing elements110,130through rotation mechanism150; two ends of second auxiliary splicing element230are respectively connected to two first auxiliary splicing elements210,220through rotation mechanism150. Similarly, position-stopping mechanisms160are disposed at the junction points between first auxiliary splicing elements210,220and first main splicing elements110,130, and between auxiliary splicing element230and two first auxiliary splicing elements210,220to provide better fastening to the display back frame. Other embodiments may comprise one or more first auxiliary splicing elements, or more second auxiliary elements, and the numbers of position-stopping mechanisms160can be less.

Because first auxiliary splicing elements210,220and second auxiliary splicing elements230are disposed within the outer frame formed by first main splicing elements110,130and second main splicing elements120,140, and are in parallel with first main splicing elements110,130or second main splicing elements120,140, therefore, the display back frame in this embodiment can also switch between the normal usage state ofFIG. 5and the folded state ofFIG. 6, and the display back frame in folded state occupies a smaller space than in normal usage state.

Referring toFIG. 7andFIG. 8,FIG. 7is a top view showing the structure of the third embodiment of the display back frame in normal usage state according to the present invention: andFIG. 8is a top view showing the structure of the third embodiment of the display back frame in folded state according to the present invention. Compared to the first embodiment, first main splicing elements110,130are disposed in parallel, and second main splicing elements120,140are disposed in parallel in this embodiment, too. The difference between this embodiment and the first embodiment is that the display back frame further comprises four auxiliary mechanisms170. Two ends of first main splicing elements110,130and two ends of second main splicing elements120,140are connected to respective rotation mechanism150through corresponding auxiliary mechanism170. As such, the display back frame in this embodiment can also switch between the normal usage state ofFIG. 7and the folded state ofFIG. 8, and the display back frame in folded state occupies a smaller space than in normal usage state.

Referring toFIG. 9,FIG. 9is a top view showing the structure of the fourth embodiment of the display back frame in normal usage state according to the present invention. In the instant embodiment, the display back frame comprises two first main splicing elements311,313, two second main splicing elements312,314, four auxiliary splicing elements321,322,323,324, a first auxiliary mechanism331, four second auxiliary mechanisms332, a plurality of rotation mechanisms350and a plurality of position-stopping mechanisms360.

In normal usage state, first main splicing elements311,313are disposed in parallel in normal usage state, and second main splicing elements312,314are disposed in parallel to form outer frame of the display back frame. In the instant embodiment, one end of each of first main splicing elements311,313and second main splicing elements312,314is connected to corresponding second auxiliary mechanism332through rotation mechanism350respectively, and the other end is connected to corresponding second auxiliary mechanism332through stop mechanism360. Auxiliary splicing elements321,322,323,324are disposed in a cross manner, with one end connected to corresponding second auxiliary mechanism332through rotation mechanism350and the other end connected to first auxiliary mechanism331through rotation mechanism350.

Referring toFIG. 10,FIG. 10is a top view showing the structure of the fourth embodiment of the display back frame in folded state according to the present invention. When switching from normal usage state to folded state, stop mechanisms360of the display back frame are removed so that each auxiliary splicing element321,322,323,324can rotate around first auxiliary mechanism331to reduce width of the back plate to save space. In the mean time, first main splicing elements311,313and second main splicing elements312,314use rotation mechanism350as axis to make fastened end of stop mechanism360rotate towards first auxiliary mechanism331. As different from the first to the third embodiments of the present invention, the present embodiment uses first auxiliary mechanism331as a center to rotate auxiliary splicing elements321,322,323,324to realize the switching between the normal usage state shown inFIG. 9and the folded state shown inFIG. 10so that the back plate in folded state occupies a smaller space than in normal usage state.

In other embodiments, the third embodiment can be simplified, for example, by cancelling second auxiliary mechanism332. One end of first main splicing elements311,313and one end of second main splicing elements312,314are connected respectively to one end of corresponding auxiliary splicing elements321,322,323,324through rotation mechanism350. Alternatively, auxiliary splicing elements321,323are replaced by an auxiliary splicing element, auxiliary splicing elements322,324are replaced by another auxiliary splicing element and rotation mechanism350is placed between the two for connection.

Referring toFIG. 11,FIG. 11is a top view showing the structure of the fifth embodiment of the display back frame in normal usage state according to the present invention. In the instant embodiment, the display back frame comprises first support frame510, second support frame520, third support frame530, aluminum extrusion540and auxiliary support frame550.

In normal usage state, first support frame510and second support frame520are disposed in parallel, and third support frame530and fourth support frame540are disposed in parallel. First support frame510, second support frame520, third support frame530and fourth support frame540are spliced to form the rectangular outer frame of the display back frame. Auxiliary support frame550is disposed between first support frame510and second support frame520, with two ends connected respectively to first support frame510and second support frame520. Auxiliary support frame550is in parallel with third support frame530and fourth support frame540. The number of auxiliary support frames550can be single or plural.

Also referring toFIG. 12,FIG. 12is a schematic view showing the three-dimensional structure of first support frame510. In this embodiment, first support frame510comprises a first main part511and a first extension part512, extending perpendicularly from one end of first main part511; wherein first main part511has the same structure as the main splicing element ofFIG. 3. Thus, the description is omitted here.

In the instant embodiment, second support frame520has the same structure as first support frame510, that is, second support frame520comprises a second main part521and a second extension part522, extending perpendicularly from one end of second main part521.

Refer toFIG. 11again. First extension part512and one end of third support frame530, the other end of third support frame530and one end of second main part521away from second extension part522, second extension part522and one end of fourth support frame540, the other end of fourth support frame540and one end of first main part511away from first extension part512are all connected respectively through a rotation mechanism500.

In comparison withFIG. 11,FIG. 13is a top view showing the structure of the fifth embodiment of the back plate in folded state according to the present invention. When switching from normal usage state to folded state, auxiliary support frame550of the display back frame is removed so that first support frame510and second support frame520, and third support frame530and fourth support frame540can rotate around rotation mechanism500respectively. As such, the outer frame of the display back frame changes from a rectangle to a parallelogram. When the display back frame is in the folded state, first main part511is connected levelly to fourth support frame540and is located between first extension part512and second extension part522. Similarly, second main part521is connected levelly to third support frame530and is located between first extension part512and second extension part522. In addition, the total length of first main part511levelly connected to fourth support frame540is equal to the total length of second main part521levelly connected to third support frame530.

As such, the display back frame of the instant embodiment can also switch between the normal usage state shown inFIG. 11and the folded state shown inFIG. 13, and the back plate in folded state occupies a smaller space than in normal usage state.

In other embodiments, those having ordinary skills in the art may easily vary the structures and elements of these drawings without paying any creative effort as long as some of the splicing elements are able to rotate through rotation mechanism so that the back plate can switch between a normal usage state and a folded state to achieve the object of the present invention, and not limited to embodiments shown inFIGS. 1-13.

Referring toFIG. 14,FIG. 14is a schematic view showing the structure of a liquid crystal display device according to the present invention. As shown inFIG. 14, a liquid crystal display device600of the present invention comprises: a display back frame610, light-guiding plate611, optical film612, light source613, liquid crystal panel614and front frame615.

In the instant embodiment, display back frame610can be any of the display back frames of aforementioned embodiments. Light-guiding plate611comprises a light entering surface and a light exiting surface and is disposed inside the display back frame610. Optical film612is disposed on the light-guiding plate611. Light source613is disposed on side wall619of the display back frame610facing the light entering surface of light-guiding plate611. Liquid crystal panel614is disposed on the top part620of display back frame610. In the instant embodiment, a buffer structure618is disposed between liquid crystal panel614and top part620of display back frame610to reduce the friction between display back frame610and liquid crystal panel614to protect liquid crystal panel614more effectively.

In the present embodiment, front frame615is assembled with display back frame610. Specifically, front frame615and wide wall619of display back frame610are fastened through a plurality of buckles616so as to sandwich liquid crystal panel614firmly between front frame615and display back frame610.

In the present embodiment, light-guiding plate611and optical film612are further fastened by tape and rubber structure, as specifically shown inFIG. 15.

InFIG. 15, the two side surfaces of light-guiding plate611perpendicular to the light-entering surface and light-exiting surface and corresponding sides of optical film612are fastened by tape621to form optical component. The four corners of the optical components are further fastened by four rubber structures622and rubber structures622are fastened to first bump617(as shown inFIG. 14).

To distinguish from the known liquid crystal display device, the present invention uses stop wall and first bump to fasten and support light-guiding plate, optical film and liquid crystal panel to eliminate the use of mold frame and improves the assembly efficiency and reduce cost. In addition, the display back frame of the present invention can switch between a normal usage state and a folded state with the display back frame in the folded state being smaller in size than in the normal usage state to reduce required space during storage and transport to improve transport and storage efficiency.

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 clams of the present invention.