KR20210132268A - Display device - Google Patents

Abstract

The present invention relates to a display device to which a light leakage prevention structure of a liquid crystal module with an exposed edge is applied. More specifically, the display device comprises: a liquid crystal panel of which the edge is exposed; a light leakage prevention member coupled to the exposed edge of the liquid crystal panel to prevent forward light leakage through the edge of the liquid crystal panel; and a support frame separated from the edge of the liquid crystal panel by a prescribed distance to enclose the edge of the liquid crystal panel, and coupled to a cover bottom positioned behind the liquid crystal panel. The light leakage prevention member is omitted, and a light leakage prevention surface is formed on the inside of the support frame facing the edge of the liquid crystal panel. The optical path of light leaked to the edge of the liquid crystal panel is controlled through the light leakage prevention surface to degrade visibility in front of the liquid crystal panel.

Description

display device {DISPLAY DEVICE}

The present invention relates to a display device of a type in which the edge of a liquid crystal panel is exposed, and in particular, a sealant or light-shielding printing structure applied to prevent light leakage to the front through the exposed edge of the liquid crystal panel is omitted, and It relates to a display device in which a light leakage preventing surface capable of reducing light leakage toward the front of a liquid crystal panel is formed on an inner surface of a support frame opposite to an edge portion.

Recently, the global display market is a trend of infinite competition for design differentiation. In order to differentiate this design, the structure of the liquid crystal display module is designed such that the end of the liquid crystal panel is externally It is disclosed in the derived state. Such a structure can produce a beautiful design by eliminating the step difference between parts on the front of the display device.

1 is a conceptual diagram showing a state of visibility due to a light leakage phenomenon of a liquid crystal module with an exposed edge portion, and FIG. 2 is a conceptual diagram illustrating a state in which a liquid crystal panel sealant is configured to prevent light leakage from an exposed liquid crystal module edge portion, as shown in FIG. (a) is a view showing a state of visibility of light according to the configuration of FIG. 1 , and (b) of FIG. 3 is a view showing a state of blocking the view of light according to the configuration of FIG. 2 .

In the structure of the conventional liquid crystal display module, the edge of the liquid crystal panel is exposed to the outside, and the liquid crystal panel is fixed to the support frame through the liquid crystal panel adhesive member. In this case, in the case of the liquid crystal panel in which the edge portion is exposed, as shown in FIG. 1 , the light leaked to the side of the liquid crystal panel through the space between the liquid crystal panel and the support frame is visually recognized. That is, as shown in (a) of FIG. 3 , a bright line visible phenomenon occurs.

Accordingly, as shown in FIG. 2 , a liquid crystal panel sealant or a printed light blocking layer (not shown) is provided on the edge of the liquid crystal panel for light leaking from the liquid crystal and exterior design. That is, in the prior art, in order to prevent light from leaking from the side of the edge of the liquid crystal panel, the sealant or light-shielding printing structure introduced in the prior art 1 and the prior art 2 is applied to the edge of the edge of the liquid crystal panel, as shown in FIG. 3 ( As shown in b), the bright line visibility phenomenon does not occur.

However, due to the addition of the process, there was an aspect that the manufacturing cost increased, and a problem occurred in that the thickness of the bezel of the side was increased. In addition, a secondary defect problem occurred in the sealant and light-shielding printing structure.

(0001) Korean Patent Publication No. 10-2018-0031605 (0002) Korean Patent Publication No. 10-2012-0014628

The technical problem to be solved by the present invention is to omit the sealant or light-blocking printing structure applied to prevent light leakage through the exposed edge of the liquid crystal panel and to be viewed, and the support frame facing the edge of the liquid crystal panel An object of the present invention is to provide a display device having a light leakage prevention effect by applying an aspherical shape capable of controlling the optical path of the leaked light to the inner surface of the .

A display device according to the present invention for achieving the above technical problem includes a liquid crystal panel with an exposed edge portion and a light leakage preventing member coupled to the exposed edge portion of the liquid crystal panel to prevent light leakage forward through the edge portion of the liquid crystal panel and In the display device comprising a support frame spaced apart from the edge portion of the liquid crystal panel at a predetermined distance to surround the edge portion of the liquid crystal panel and coupled with a cover bottom located at the rear of the liquid crystal panel, the light leakage preventing member is omitted, and the A light leakage preventing surface is formed on the inner surface of the support frame opposite to the edge of the liquid crystal panel, and the light leaking to the edge of the liquid crystal panel is controlled in an optical path through the light leakage preventing surface, so that visibility in front of the liquid crystal panel It is characterized in that it decreases.

In addition, the light leakage preventing surface is characterized in that it has an aspherical curvature structure.

Here, the aspherical curvature is characterized in that the coordinate value 'Y' corresponding to the deepest vertical distance is formed by the following relational expression.

here,

Y: Aspherical Y-axis coordinate value

x : Aspherical x-axis coordinate value

c: aspherical curvature (4.55e-0.05 ＜ c ＜ 3.03e-0.05)

e: eccentricity

k : conic constant (-2 < k < 2)

In addition, the front end of the light leakage preventing surface is characterized in that to form a concave surface from the inside to the front.

In addition, at least one pattern of an intaglio pattern and an embossed pattern is formed on the light leakage preventing surface.

The present invention described above has the following effects.

First, in a display device having a design in which the edge of the liquid crystal panel is exposed to the outside, the sealant and shading printing structure applied to prevent light leaking through the exposed edge and being visually recognized are omitted, thereby reducing the number of processes and working efficiency. It can not only improve the performance, but also solve the problem of defects occurring in the sealant and light-shielding printing structures.

In addition, by forming a light leakage prevention surface with a curvature structure that can control the light path of the leaked light on the inner surface of the support frame opposite to the exposed liquid crystal panel, the visibility of leaked light can be minimized without a sealant and light blocking printing structure. can

In addition, the structure that forms the light leakage prevention surface on the support frame can reduce the defect rate compared to the technology applying the sealant and light-shielding printing structure, thereby improving the production efficiency as well as the work efficiency.

In addition, by forming a concave surface at the end of the light leakage preventing surface, it is possible to further improve the effect of reducing the visibility of the leaked light.

In addition, by adding at least one of the engraved pattern and the embossed pattern to the light leakage preventing surface, it is possible to reduce the visibility by offsetting the light leaking through the diffuse reflection.

1 is a conceptual diagram showing a visible state due to a light leakage phenomenon of a liquid crystal module with an exposed edge portion;
2 is a conceptual view showing a state in which a liquid crystal panel sealant is configured to prevent light leakage from the exposed edge of the liquid crystal module;
Figure 3 (a) is a view showing a state of visibility of light according to the configuration of Figure 1,
Figure 3 (b) is a view showing a state of blocking the view of light different from the configuration of Figure 2;
4 is a conceptual view showing a light leakage prevention surface configured in a support frame on the side of the liquid crystal panel to which the edge portion is exposed according to an embodiment of the present invention;
5 is a view comparing the viewing angle state of the general support frame and the curvature support frame according to the present invention;
6 is a conceptual view showing a state of visibility when using a support frame to which a light leakage prevention surface is applied according to an embodiment of the present invention;
7 is a reference view for Equation 1,
8 is a conceptual diagram showing a support frame to which a light leakage prevention surface is applied according to another embodiment of the present invention;
9 is a conceptual view showing a state in which an embossed pattern is formed on the light leakage preventing surface according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the components from other components, and the essence, order, or order of the components are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

4 is a conceptual view showing the light leakage preventing surface 21 configured on the support frame 20 on the side of the liquid crystal panel 10 to which the edge part is exposed according to an embodiment of the present invention, and FIG. 5 is a general support frame and the present invention. It is a view comparing the viewing angle state of the curvature support frame according to the present invention. It is a reference view for Equation 1, and FIG. 8 is a conceptual view showing the support frame 20 to which the light leakage prevention surface 21 is applied according to another embodiment of the present invention, and FIG. 9 is a light leakage prevention according to an embodiment of the present invention. It is a conceptual diagram showing a state in which the embossed pattern is formed on the surface 21 .

A display device according to the present invention will be described with reference to FIGS. 4 to 9 as follows.

Prior to the description, it is determined that there is a risk of obscuring the gist of the present invention since each configuration state including the liquid crystal module in which the edge portion of the display device is exposed is a known technology, so the basic configuration will be referred to FIG. 2 , and detailed description thereof should be omitted.

The liquid crystal display module applied to the present invention is composed of a liquid crystal panel, a cover bottom that maintains the rigidity and shape of the module, a light source and an optical sheet disposed inside the cover bottom, and a support frame (guide panel) for fixing the liquid crystal panel. , a liquid crystal panel adhesive member for fixing the liquid crystal panel is applied to the upper surface of the support frame (see FIG. 2).

The liquid crystal panel 10 and the support frame 20 applied to the present invention have a design in which the edge of the liquid crystal panel 10 is exposed to the outside, but on the edge side of the liquid crystal panel 10, a sealant or light blocking agent for preventing light leakage The print structure does not apply.

That is, in the display device of the present invention, light leakage such as a liquid crystal panel sealant or a printed light blocking layer coupled to the exposed edge of the liquid crystal panel to prevent light leakage forward through the liquid crystal panel with the edge portion exposed and the edge portion of the liquid crystal panel In the display device comprising a support frame that is spaced apart from the edge of the liquid crystal panel by a predetermined distance and is coupled to a cover bottom positioned at the rear of the liquid crystal panel while surrounding the edge of the liquid crystal panel, the light leakage preventing member is omitted. And, the light leakage preventing surface 21 is provided on the inner surface of the support frame (20).

Referring to FIG. 4 , a light leakage preventing surface 21 is provided on the inner surface of the support frame 20 opposite to the exposed edge of the liquid crystal panel 10 . The light leakage preventing surface 21 has an aspherical curvature structure at the front end thereof. Here, 'front' refers to the upper part with reference to FIG. 4, and the lower part is referred to as 'rear'. As shown in 'A' of FIG. 4 , the light leaking through the exposed edge of the liquid crystal panel 10 is blocked by the light leakage preventing surface 21 .

That is, the light leaking to the edge of the liquid crystal panel 10 is controlled through the light leakage preventing surface 21 at the angle of reflection of the light, so that the visibility in front of the liquid crystal panel 10 is reduced.

As described above, according to the support frame 20 to which the light leakage prevention surface 21 having a non-curvature is applied, the light refraction path due to the curvature is changed, so that the light intensity of the curvature is reduced, so that the side viewing angle is reduced compared to the general support frame. (refer to FIGS. 5 and 6)

In this case, the aspherical curvature is formed by the following relational expression (Equation 1), the coordinate value 'Y' corresponding to the deepest vertical distance (see FIG. 7).

here,

Y: Aspherical Y-axis coordinate value

x : Aspherical x-axis coordinate value

c: aspherical curvature (4.55e-0.05 ＜ c ＜ 3.03e-0.05)

e: eccentricity

k: Conic constant (-2 < k < 2).

By applying the aspherical curvature formed by the above [Equation 1], it is possible to effectively prevent light from leaking between the liquid crystal module 10 with the edge portion exposed and the support frame 20 provided with the light leakage preventing surface 21. .

Meanwhile, referring to FIG. 8 , a concave surface (aspherical curvature) from the inside to the front may be formed at the front end of the light leakage preventing surface 21 . At this time, the inner aspherical curvature shape of the support frame 20 is preferably configured to have an upwardly concave shape according to the length and thickness of the bezel or support frame 20 . That is, when the gap between the edge end of the liquid crystal panel 10 and the support frame 20 increases due to an increase in the bezel size, light leaked through the gap can be viewed from the front, so the light leakage preventing surface 21 ) can be concave from the bottom to the top to increase the path blocking surface of the forward reflected light.

In addition, as shown in the enlarged view 'A' of FIG. 9 , on the light leakage preventing surface 21, at least one of an intaglio pattern and an embossed pattern may be formed. Although only the embossed pattern is formed on the drawing, only the conceptual shape is shown, the embossed pattern and the engraved pattern can be applied at the same time to offset the reflected light leaking to the outside through the diffuse reflection of light. Since the diffuse reflection technology itself using the embossed pattern and the engraved pattern is a known technology, a detailed description thereof will be omitted. The embossed pattern and the engraved pattern applied to the light leakage preventing surface 21 can be implemented through corrosion of the mold surface or a printing method.

According to the present invention described above, by applying an aspherical shape that can control the optical path, that is, the light leakage preventing surface 21, to the inner surface of the support frame 20 opposite to the exposed edge portion of the liquid crystal panel 10, Visibility due to light leakage can be improved without the existing sealant or light-shielding printing structure, and through this, it is possible to reduce the manufacturing cost and minimize the defect rate through the simplification of the panel manufacturing process.

In the above, even though it has been described that all components constituting the embodiment of the present invention operate as one combined or combined, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, terms such as "comprises", "comprises" or "have" described above mean that the corresponding component may be inherent, unless otherwise stated, excluding other components. Rather, it should be construed as being able to further include other components. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Commonly used terms such as terms defined in the dictionary should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Accordingly, the embodiments disclosed in the present invention are for explanation rather than limiting the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

10: liquid crystal panel 11: support frame
21: light leakage prevention surface

Claims (5)

A light leakage preventing member coupled to the exposed edge of the liquid crystal panel and the edge of the liquid crystal panel are spaced apart from the liquid crystal panel by a predetermined distance to prevent light leakage forward through the liquid crystal panel with the edge portion exposed and the edge portion of the liquid crystal panel. In the display device comprising a support frame coupled to the cover bottom positioned at the rear of the liquid crystal panel while surrounding the edge of the panel,
The light leakage preventing member is omitted,
A light leakage preventing surface is formed on the inner surface of the support frame opposite to the edge of the liquid crystal panel,
The light leakage to the edge of the liquid crystal panel is the light path is controlled through the light leakage prevention surface is a display device, characterized in that the visibility in front of the liquid crystal panel is reduced. According to claim 1,
The light leakage preventing surface is a display device having an aspherical curvature structure. 3. The method of claim 2,
The aspherical curvature is a display device in which the coordinate value 'Y' corresponding to the deepest vertical distance is formed by the following relational expression.

here,
Y: Aspherical Y-axis coordinate value
x : Aspherical x-axis coordinate value
c: aspherical curvature (4.55e-0.05 ＜ c ＜ 3.03e-0.05)
e: eccentricity
k : conic constant (-2 < k < 2) According to claim 1,
The front end of the light leakage preventing surface is a display device to form a concave surface from the inside to the front. According to claim 1,
A display device in which at least one pattern of an intaglio pattern and an embossed pattern is formed on the light leakage preventing surface.

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