KR102410429B1 - Frame using Double Injection molding and Curved Display Device having the same - Google Patents

Abstract

The double injection frame according to the present invention provides a double injection frame that can be coupled to the liquid crystal module in close contact with the liquid crystal module in response to the curvature of the curved liquid crystal module. Here, the double injection frame can respond flexibly to the curvature of the liquid crystal module by providing a third support formed by double injection molding with a flexible material at a portion where the curvature of the liquid crystal module changes. In addition, there is provided a display device including a liquid crystal module, a housing, and a double injection frame, and a double injection frame coupled in close contact with a liquid crystal module formed in a curved surface.

Description

Frame using Double Injection molding and Curved Display Device having the same}

The present invention relates to a double injection frame that can be elastically bent corresponding to the curved surface of a liquid crystal module and a curved display device having the same.

As we enter the information age in earnest, the field of display for visually displaying electrical information signals is rapidly developing. Accordingly, research to develop performance such as thinner, lighter, and lower power consumption for various flat display devices is continuing.

Representative examples of such a flat panel display device include a liquid crystal display device (LCD), a plasma display panel device (PDP), a field emission display device (FED), and an electroluminescence display device. (Electro Luminescence Display device: ELD), Electro-Wetting Display device (EWD), Organic Light Emitting Display device (OLED), and the like can be cited.

Such flat panel display devices display an image by using a unique light emitting material or a polarizing material interposed between a pair of substrates bonded to each other to face each other.

In addition, the liquid crystal display includes a liquid crystal panel that displays an image by using the optical anisotropy and polarization properties of liquid crystal. The liquid crystal panel includes a pair of substrates and a liquid crystal layer injected therebetween, and the light transmittance of each pixel area is adjusted by adjusting the arrangement direction of the liquid crystal. That is, the liquid crystal panel does not generate light by itself, and displays an image by controlling the amount of light supplied from the outside is emitted from each pixel area. Accordingly, the liquid crystal display includes a backlight unit that irradiates light to the liquid crystal panel.

Such a liquid crystal display device may be mounted as a component of another electronic device. That is, the liquid crystal display device is a device that displays an image or is implemented as a device provided as a user interface in various electronic devices such as a navigation device, a notebook computer, or a home appliance.

In addition, recently, the development of a curved display formed in a structure in which the distance between the center area and the side edge area of the liquid crystal display device and the viewing area of the viewer is the same is being actively developed.

Because such a curved display maintains the same distance from the viewing area to the entire area of the liquid crystal display, distortion is less, and as the viewing angle is widened, a large amount of information can be transmitted as visual information, and fatigue is reduced and comfortable viewing of images is possible. There are advantages to doing.

However, such a curved display has a limitation in that the liquid crystal module is fixed to the outer frame in close contact with the liquid crystal module and the outer frame supporting the same.

In addition, when the curvature of the liquid crystal module and the curvature of the outer frame exceed the deformation critical point, either one of them is damaged, or the manufacturing process and product reliability are deteriorated while not continuously maintaining the fixed state.

The present invention is provided with a first support part for supporting a flat surface, a second support part for supporting a curved surface, and a third support part which is bent to respond flexibly to the curvature of the liquid crystal module, so that the tolerance range of the double injection frame is widened and the liquid crystal module and To provide a double-injection frame and a display device having the same, which can increase the assembly yield and reduce product defects by reducing cracks or breakage of a liquid crystal module or double-injection frame.

In order to solve the above problems, the present invention is coupled to support both ends of a liquid crystal module formed in a flat surface, and a first support part injection-molded with a first material, and a curved surface to support the upper or lower sides of the liquid crystal module formed in a curved surface It is composed of a second support part that is formed and coupled, and a third support part that is injection-molded with a second material that is elastically bent so as to correspond to a portion where the center or curvature of the liquid crystal module formed in a curved surface is deformed, so that it is in close contact with the curved shape of the liquid crystal module. can be combined

In addition, the present invention is a liquid crystal including the above-described double injection frame, a liquid crystal module having a display panel and a backlight unit mounted inside the double injection frame, and a top cover coupled to the double injection frame to support the outer portion of the liquid crystal module. It can be combined to closely adhere to the curved shape of the module.

According to the double injection frame and the curved display device having the same according to the present invention,

First, the durability is improved because the double injection frame is molded by double injection using different materials,

Second, the liquid crystal module and the double injection frame can be closely coupled with each other by providing a third support part that elastically corresponds to the curvature of the liquid crystal module,

Third, it is possible to prevent cracks from occurring at any one of the moments when the liquid crystal module and the double injection frame are in close contact due to the elasticity of the third support part,

Fourth, since the liquid crystal module and the double injection frame can be closely coupled, the effect of improving product reliability can be expected by preventing light leakage and significantly reducing the defect rate.

1 is an exploded perspective view showing a curved display device having a double injection frame according to an embodiment of the present invention.
FIG. 2 is a partially enlarged view showing a part of the double injection frame shown in FIG. 1 .
Fig. 3 is a side view showing the display device shown in Fig. 1;

Hereinafter, preferred embodiments of the present invention will be described so that those of ordinary skill in the art can easily implement them with reference to the accompanying drawings. It should be noted that the reference numbers indicated on the components in the accompanying drawings use the same reference numbers as much as possible when indicating the same components in other drawings. In addition, in the description of the present invention, when it is determined that a detailed description of a related known function or a known configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, certain features presented in the drawings are enlarged, reduced, or simplified for ease of explanation, and the drawings and components thereof are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

1 is an exploded perspective view showing a curved display device having a double injection frame according to an embodiment of the present invention separated, and FIG. 2 is a partially enlarged view showing a part of the double injection frame shown in FIG. 1 .

1 and 2 , the display device 100 of the present invention includes a liquid crystal module 10 in which a liquid crystal panel 110 and a backlight unit 120 are combined to form a curved surface, and a rear surface of the liquid crystal module 10 . A double injection frame 130 that is coupled to the liquid crystal module 10 and is coupled in close contact with the curved surface of the liquid crystal module 10, and a housing 140 that is coupled to the front and rear surfaces of the double injection frame 130 to form an external shape. do.

The liquid crystal panel 110 includes an upper substrate (not shown) and a lower substrate (not shown), and a liquid crystal layer (not shown) may be provided between the upper substrate and the lower substrate, and upper and lower surfaces of the liquid crystal layer An alignment layer (not shown) disposed on one side of the liquid crystal layer and initially aligning the liquid crystal inside the liquid crystal layer may be provided, and a polarization layer (not shown) disposed on the upper or lower portion of the liquid crystal panel 110 and transmitting polarized light city) may be provided.

The liquid crystal panel 110 selectively turns on-off a plurality of transistors to form an electric field that changes the arrangement direction of liquid crystals for each pixel region, thereby adjusting the light transmittance of each pixel region to display an image.

In addition, the housing 140 may include a top cover (not shown) disposed on the front surface of the liquid crystal module 10 and a bottom cover (not shown) coupled to the top cover to cover the rear surface of the liquid crystal module.

Here, the liquid crystal panel 110 and the backlight unit 120 are accommodated between the bottom cover and the top cover coupled to each other, and the support main therein is supported to prevent the liquid crystal panel from flowing. Also, the backlight unit 120 may be integrally mounted inside the bottom cover.

In addition, the liquid crystal panel 110 is bonded to the upper substrate and the lower substrate to face each other, and a liquid crystal layer may be disposed therebetween.

Although not shown in detail in FIG. 1 , when the liquid crystal panel 110 is driven in the active matrix method, the liquid crystal panel 110 is formed on any one of an upper substrate and a lower substrate (eg, on a lower substrate. In addition, a plurality of The liquid crystal panel 110 may further include a plurality of thin film transistors (not shown) corresponding to the pixel regions, and when the liquid crystal panel 110 displays a color image, the liquid crystal panel 110 corresponds to each pixel region. It further includes a color filter layer (not shown) to filter the color.

In addition, the backlight unit 120 is disposed below the liquid crystal panel 110 and irradiates light toward the liquid crystal panel 110 .

For example, the backlight unit 120 includes a plurality of light sources 121 emitting light, a flexible circuit board (FPCB) on which the plurality of light sources 121 are mounted, and converts light emitted from the plurality of light sources into a planar light source. a light guide plate (LGP, 122)), a plurality of optical sheets (111) disposed between the light guide plate (122) and the liquid crystal panel (110), and a reflective sheet (Reflector) disposed under the light guide plate (122) , 123).

Each of the plurality of light sources 121 may be a light emitting diode (LED) emitting white light.

The double injection frame 130 includes a first support part 131 for supporting corner portions disposed at both ends in the longitudinal direction of the liquid crystal module 10 formed in a square shape, and a liquid crystal module ( 10) includes a second support portion 132 for supporting the edge portion formed along the longitudinal direction, and a third support portion 133 integrally formed with the second support portion 132 to support the curved portion of the liquid crystal module. . And the double injection frame 130 may accompany the function of the guide panel.

Here, the first support part 131 is disposed to face the left/right ends of the liquid crystal module 10 , and the second support part 132 is also disposed to face the upper/lower ends of the liquid crystal module 10 . And the third support 133 is disposed at the center of the curved portion of the liquid crystal module (10).

The third support part 133 is disposed at a portion where the radius of curvature of the liquid crystal module 10 decreases. can be provided.

As shown in FIG. 2 , a third support part 133 is provided at the center of the double injection frame 130 .

At this time, the first support part 131 and the second support part 132 are injected with a first material (Polycarbonate), which is a plastic synthetic resin material, and the third support part 133 is a urethane resin, a polyester resin. , Polyvinyl Chloride resin, Polystyrene resin, Polyethylene resin, Polypropylene resin, Urea resin, Silicon resin as a group to the second material including at least one or a plurality of injections. In addition, since the first material and the second material are manufactured by double injection in the same injection machine, there is no need to additionally perform a separate injection process. There is an effect that can be improved.

Therefore, the third support part 133 is freely bent because it has a relatively flexible elasticity compared to the first support part 131 and the second support part 132 .

Then, in response to the change in curvature of the liquid crystal module 10, since the double injection frame 130 and the liquid crystal module 10 can be coupled in close contact with each other, the tolerance range in the curved portion is increased. That is, as the curvature or radius of curvature of the liquid crystal module 10 changes, the double injection frame 130 can be coupled in close contact with it, so that there is a lifting or light between the liquid crystal module 10 and the double injection frame 130 . It has the effect of reducing defects such as leaks.

In addition, even if the curvature of the liquid crystal module 10 and the set curvature of the double injection frame 130 are different, the third support part 133 is elastically deformed to adjust the curvature close to the curvature of the liquid crystal module 10 . Therefore, even after the molding of the double injection frame 130 is completed, there is an effect that can solve the problem of cracks or damage during the bonding process with the liquid crystal module 10 .

Fig. 3 is a side view showing the display device shown in Fig. 1;

Referring to FIG. 3 , FIG. 3 (a) is a shape having a constant curvature from the center area to both ends of the display apparatus 100, and FIG. 3 (b) is a diagram in which the center area of the display apparatus 100 is flat. It represents a shape in which the curvature is partially formed in the portion adjacent to the end portion.

At this time, the third support part of the double injection frame is positioned at the part where the curvature is changed. Accordingly, in FIG. 3(a) , the third support part is positioned in the central portion, and in FIG. 3(b), the third support part is positioned in the region adjacent to both ends. Also, although not shown in the drawings, when a portion having a change in curvature is formed in three or more regions, a third support portion may be further provided to correspond to the region.

And it is preferable that the third support portion is formed in a smaller area than the second support portion. For example, the third support part is formed in a ratio of 1/10 to 1/2 compared to the second support part. This is to prevent a decrease in rigidity for supporting the upper and lower sides of the liquid crystal module when the size of the third support part is larger than a set range or when it is formed over a larger area than that of the second support part. In addition, the third support part may be implemented to correspond to the changed curvature through one third support part even if a change in curvature occurs in different adjacent regions of the liquid crystal module.

In the above, specific embodiments have been described with reference to the drawings to illustrate the technical idea of the present invention, but the present invention is not limited to the same configuration and effects as the specific embodiments as described above, and various modified examples are within the scope of the present invention. It can be carried out within the limit that does not deviate from Accordingly, such modifications should be regarded as belonging to the scope of the present invention, and the true technical protection scope of the present invention should be determined by the spirit of the claims to be described later.

100: display device
110: liquid crystal panel 111: optical sheet
120: backlight unit 121: light source
122: light guide plate 123: reflective sheet
130: double injection frame 131: first support
132: second support 133: third support
140: housing 10: liquid crystal module

Claims (5)

a first support part which is injection molded by a first material and supports both side short sides of the liquid crystal panel;
a second support part bent from both side short sides of the first support part to support the upper and lower long sides of the liquid crystal panel; and
a third support portion integrally injection-molded by a second material different from the first material to support the curved portion of the liquid crystal panel in the second support portion;
A frame comprising a,
The frame is a double injection frame having an L (L) shape or a L (Nieun) shape to accommodate the plurality of optical sheets and support the liquid crystal panel. The method according to claim 1,
The third support portion is a double injection frame provided with at least one portion of the curvature radius of the liquid crystal panel decreases. The method according to claim 1,
The third support part is elastically deformed in appearance to correspond to the shape of the curved part of the liquid crystal module, and is made of urethane resin, polyester resin, polyvinyl chloride resin, polystyrene resin, polyethylene resin, polypropylene resin, urea resin, and silicon resin. Double injection frame comprising at least one or a plurality as a group. The method according to claim 1,
The third support portion is a double injection frame formed in a ratio of 1/10 to 1/2 compared to the second support portion. liquid crystal panel;
The double injection frame according to any one of claims 1 to 4, which supports the outer portion of the liquid crystal panel and is coupled to correspond to the curved portion of the liquid crystal panel in close contact;
a housing coupled to the double injection frame to cover a corner portion of the liquid crystal panel;
A display device comprising a.

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