KR101602959B1 - Display apparatus - Google Patents

Abstract

The present invention relates to a display device, in which a front edge portion of a display device is exposed to the outside, and a width of an image non-display region defined in a front edge portion of the display device is narrower than an actual size, There is a big visible effect.

Display module, front panel, back cover

Description

[0001]

The present invention relates to a display device.

In general, a display device is a device for outputting an image or a moving image through an image, such as a TV, a computer monitor, and the like.

In recent years, high-definition and large-sized display devices such as a liquid crystal display panel (LCD) or a plasma display panel (PDP) have appeared.

In addition, efforts are being made to minimize the width of the edge portion where the image is not displayed in order to make the display image relatively large compared to the display module of the same size.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an assembly structure of a display device in which a width of an image non-display area formed on a front edge of a display device is made narrower than actual.

According to an aspect of the present invention, there is provided a display device including a display module to output an image; A transparent front panel coupled to the front of the display module and covering the entire front surface of the display module and having a rim exposed to the outside; A shielding member attached to a rear surface of the front panel, the shielding member having a predetermined width at an edge of the front panel and surrounding the rim of the front panel; A module bracket attached to the shielding member and fixed to a back surface of the front panel, the module bracket supporting the display module; And a back cover which covers the front surface of the front panel and protects the display module. The front panel includes a display non-display area defined by the shielding member and an inner space of the shielding member A light path changing part for changing a light path of light is formed at an edge part of the front panel corresponding to an outer edge area of the image non-display area, and an outer edge of the image non- Wherein the light path changing portion formed in the region is a prism array in which a plurality of pieces of prism are arranged in the center direction of the image non-display region from the outer edge of the image non-display region, Wherein the plurality of prism pieces are disposed in the image non- Wherein the refracting surface of the plurality of prism pieces is a rounded refracting surface of a concave lens divided into a plurality of segments or a concave surface of the concave lens divided into a plurality of segments, And the prism array extends linearly along the rim of the front panel.

According to the display device having the above-described structure, the screen is larger than other display devices having the display module of the same standard. In addition, there is an effect that the image display area of the display device is actually enlarged.

Further, unlike the conventional display device which is made of a plastic injection material and covers the front edge of the display device, the front edge area of the display device can be assembled in a state in which the front edge area is directly exposed to the outside. Therefore, there is an advantage that the appearance of the display device can be designed so that the product can be upgraded.

Hereinafter, embodiments of the present invention will be described in detail with reference to specific examples.

It is to be understood that the spirit of the present invention is not limited to the embodiments shown in the drawings and that other embodiments embodied by a combination of respective embodiments are included in the scope of the present invention .

1 is a front perspective view of a display device according to an embodiment of the present invention.

Referring to FIG. 1, in a display device 10 according to an embodiment of the present invention, a front portion is not clearly divided into an image display region and an image non-display region in a state where power is not applied. In detail, in a state where power is not applied to the display module, both the front portion of the display device corresponding to the image display region and the image non-display region forming the outer frame of the image display region are close to black.

However, when power is supplied to the display device and an image is output from the display module, the image display area and the image non-display area are clearly distinguished. In addition, the width of the image non-display area is narrower than the actual width by the optical path changing unit (to be described later) according to the embodiment of the present invention. In other words, light refraction occurs due to the light path changing portion formed at the outer edge portion of the image non-display region. Therefore, the width of the image non-display area is narrower than the actual width in the viewer's eyes. Such optical phenomenon will be described in more detail with reference to the drawings hereinafter.

The display device 10 includes a transparent front panel 11, a display module (not shown) provided on the rear surface of the front panel 11, And a back cover 16 directly or indirectly coupled to the back surface of the front cover 11. A shielding member 12 corresponding to an image non-display area is provided at an edge of the front panel 11. [ The shielding member 12 is provided to prevent a part of the edge of the display module from being exposed to the outside. In addition, the shielding member 12 may be a thin sheet of opaque material through which light is not transmitted, and a black film may be used as an example. The shielding member 12 is referred to as a bezel by a person skilled in the art and has a rectangular band shape having a predetermined width and surrounding the edge of the front panel as shown in the figure.

2 is a view schematically showing the principle of a concave lens.

Referring to FIG. 2, there is shown how an image is formed when the object M is placed in front of the concave lens L1.

The distance from the concave lens L1 to the focal point is f, the distance from the concave lens L1 to the object M is a, the distance to the image m of the object M is b The focal length formula is as follows.

1 / a + 1 / b = 1 / f

When the object substance M is positioned within the focal distance f, an upright virtual image m of a reduced size is formed at a certain point between the object M and the concave lens L1. That is, the upright virtual image m of the reduced size is recognized in the eye of the observer, and the object M appears smaller than the actual size. For example, light passing through the upper end of the object M passes through the concave lens L1 and is refracted upward as indicated by a solid line. Then, the observer's eye appears to have an optical path represented by a dotted line without the concave lens L1.

3 is a view showing the principle of a Fresnel lens applied to the idea of the present invention.

Referring to FIG. 3, the Fresnel lens originates from a lens whose original thickness is reduced while having the same function as a convex lens. Specifically, the convex Fresnel lens is made by cutting a convex lens in an upright state into a plurality of segments in the lateral direction (direction parallel to the light passing direction) and horizontally moving these pieces in one plane. Then, the rounded refracting surface of the convex lens formed on each piece is flattened and deformed into a prism shape. When the rounded refracting surface of the convex lens is flattened, the chromatic aberration is reduced and the thickness of the lens itself is reduced.

The principle of this convex Fresnel lens can be used to make a concave Fresnel lens in the same way.

As shown in FIG. 3, a portion of the edge of the concave lens corresponding to the region (l) necessary for application to the front panel of the present invention is divided into a plurality of segments. The round refracting surface of the concave lens formed on each segment is flattened so that a plurality of prisms are arranged in a line on one plane. It is a matter of course that the refracting surface of the prism may take the round refracting surface of the concave lens as it is. In the present invention, a prism array is defined as a configuration in which a plurality of small prisms are arranged in a line on one plane as described above. The refracting surfaces of the respective prism pieces constituting the prism array have different inclination angles. That is, the inclination angle of the refraction surface of the prism piece increases toward the outer side, and the inclination angle of the refraction surface of the prism piece decreases toward the inner side. Here, the inclination angle means an angle formed by the refraction surface with respect to the vertical plane in the drawing.

According to this work, chromatic aberration caused by wavelength difference of light is reduced while exhibiting the same effect as that of the concave lens, and a concave Fresnel lens having a thickness thinner than that of the conventional concave lens edge is produced.

The concave Fresnel lens having the above-described prism array region has the same principle as a general concave lens. That is, light passing through the prism array region is refracted outward of the lens and diffused. When the object is placed on the left side of the concave Fresnel lens, a fixed virtual image smaller than the size of the actual object is recognized to the observer. The prism array may be formed on the front edge region of the display device, particularly on the outer edge of the image non-display region. Hereinafter, it is defined that the prism array formed on the front surface of the display device is defined as a light path changing portion, and the prism array and the light path changing portion can be used in combination. The actual traveling path of the light passing through the prism array region will be described in detail below with reference to the drawings.

4 is a partial cross-sectional view illustrating a configuration of a front panel and a shield member for defining an image non-display region provided on a front surface of a display device according to an embodiment of the present invention.

Referring to FIG. 4, an optical path changing portion 111 to which a prism array is applied is formed on a front edge of a front panel 11 according to an embodiment of the present invention. A shielding member 12 of an opaque material is provided on the rear of the front panel 11. The front panel 11 shields the image display area Q and the image non- P). That is, the inner space of the shielding member 12 is defined as the image display area Q, and the portion surrounded by the shielding member 12 becomes the image non-display area P. Here, the opaque material 12 is opaque meaning that the image can not be projected to the outside so that the viewer can not recognize the image, or an object or part disposed in the room immediately after the shielding member 12 It can be understood as a level of blocking the passage of light to such an extent as not to be exposed to the outside. That is, it does not mean that light does not pass through at all.

Further, the light path changing portion 111 means a structure in which light traveling forward from the back surface of the front panel 11 is refracted in a specific direction. In other words, the front panel 11 has a function of artificially changing the light traveling path so that the light traveling forward from the back surface of the front panel 11 is collected in one place or diffused outward. The present invention is limited to the optical path changing portion 111 for allowing the light to diffuse outward so that the width of the shielding member 12 provided on the rear surface of the front panel is narrowed. As an embodiment of the optical path changing unit 111 functioning to artificially change the light traveling path, a prism array using the Fresnel lens principle as described with reference to FIG. 3 may be proposed.

In detail, in the case of a general Fresnel lens, a plurality of concentric protrusions and grooves are formed on the surface of the lens, but in the present invention, a plurality of protrusions and grooves are formed in a straight line parallel to the edge surface of the front panel 11 For example,

More specifically, a linear prism array is provided in a linear shape at the edge portions of the front panel 11, that is, the upper and lower left and right edge portions. The width of the prism array, that is, the light path changing portion 111 may be set differently depending on how much the outer edge of the shielding member 12 is narrowed.

 FIG. 5 is a diagram illustrating an optical phenomenon appearing on a front panel of a display device having an optical path changing unit according to an embodiment of the present invention. FIG. 6 is a view illustrating a state in which an image non- Fig. 2 is a perspective view of a display device.

5 and 6, a description is given of an image of the shielding member 12 that is formed on the viewer's eyes when the shielding member 12 is provided at a position apart from the rear surface of the front panel 11. [

In detail, when the concave Fresnel lens is applied, the size of the image formed becomes smaller as the distance between the object and the lens becomes larger. Therefore, in this embodiment, the amount of reduction of the image formed on the viewer's eyes differs according to the distance k between the shielding member 12 and the front panel 11. [ That is, as the distance between the shielding member 12 and the front panel 11 increases, the size of the image becomes smaller.

In the drawing, a path of light passing through the upper end of the shielding member 12 and an image are shown.

In detail, the light is spread in all directions at the upper end of the shielding member 12, and the light spreading toward the front panel 11 is refracted while passing through the front panel 11. This refraction phenomenon occurs when the medium passes through another material, that is, air and the front panel 11. The light passing through the front panel 11 passes through the optical path changing portion 111 of the concave lens shape and is refracted again in the direction of diffusing. The virtual image 121 finally formed on the viewer's eyes is smaller than the actual size of the shielding member 12. [ As shown in the figure, it is recognized that the upper end of the shielding member 12 is located at a point where the viewer's eye descends downward. A portion indicated by a bold arrow typically represents light reaching the viewer's eyes, and a virtual image 121 is formed at a point where the arrows intersect. The virtual image 121 is formed between the shielding member 12 and the front panel 11.

Since the thickness t of the front panel 11 is a fixed value, the position of the upper end of the virtual image 121 is determined according to the distance k between the shielding member 12 and the front panel 11. That is, as the shielding member 12 moves away from the front panel 11, the upper end of the virtual image 121 descends further downward. As a result, the width of the image non-display area P as a whole becomes narrower than the actual width. As a result, an optical illusion phenomenon in which the area of the image display area Q is relatively large is caused.

The light path changing portion 111 is formed only on the outer edge of the shielding member 12 so that the outer edge of the shielding member 12 moves toward the center of the display device 10, Will be recognized. This phenomenon will be clearly understood from Fig.

FIG. 7 is an exploded perspective view of a display device having an optical path changing part according to an embodiment of the present invention, FIG. 8 is a cross-sectional view taken along line I-I 'of FIG. 6, Fig.

7 and 8, the display device 10 according to the embodiment of the present invention has a structure in which front edge portions are exposed as they are to the outside.

A front panel 11 provided on the front surface of the display module 14 to form the entire front surface of the display device 10; A module bracket 13 provided to firmly attach the display module 14 to the rear surface of the front panel 11 and a module bracket 13 fixed to the rear surface of the front panel 11, And a back cover 15 for covering and protecting the front cover 13.

In detail, both side edge portions of the display module 14 are surrounded and supported by the module bracket 13. The module bracket 13 includes a contact surface 131 attached to the back surface of the front panel 11 and a support surface 132 bent at the end of the contact surface and closely contacting the side surface of the display module 14 And an engaging end 133 folded inward at an end of the support portion 132 and bent outward. The module bracket 13 may be provided in the form of a metal piece having a predetermined elastic force. For example, a spring steel is applicable.

In addition, the shielding member 12 is attached to the rear edge region of the front panel 11 to define an image non-display region. The support surface 132 of the module bracket 13 and the back cover 15 are not exposed to the outside by the shielding member 12.

Further, the contact surface 131 of the module bracket 13 is fixed to the point where the shielding member 12 is attached by an adhesive. Both ends of the display module 14 are fitted to the module bracket 13 in this state.

In detail, the contact surface 131 and the support surface 132 of the module bracket 13 are kept bent at an angle of less than 90 degrees. The side edge portion of the display module 14 is brought into contact with the latching end 133 in the process of bringing the display module 14 into close contact with the rear surface of the front panel 11. As the display module 14 approaches the back surface of the front panel 11, the supporting surface 132 is deformed by the elastic deformation. Then, the support surface 132 and the contact surface 131 are maintained at an angle of about 90 degrees, and the support surface 132 presses the side surface of the display module 14 by the elastic force. The latching end 133 is hooked on the rear edge of the display module 14 so that the display module 14 is not detached.

A plurality of fastening bosses 141 protrude from the rear edge of the display module 14, and the fastening holes are formed in the back cover 15.

More specifically, when the back cover 15 is seated on the back surface of the display module 14, the fastening holes formed in the back cover 15 are aligned with the fastening bosses 141 of the display module 14. The fastening member passes through the fastening hole and is inserted into the fastening boss 141, so that the back cover 15 is fixed to the back surface of the display module 14. The front end of the side surface of the back cover 15 is in close contact with the rear edge of the front panel 11. Here, the outer side surfaces of the side portions of the back cover 15 are aligned on the same plane as the side surfaces of the front panel 11, or positioned at a position spaced inward from the side surface of the front panel 11. [

The display module 14 is spaced apart from the front panel 11 by at least the thickness of the contact surface 131 of the module bracket 13. Here, since the shielding member 12 is provided in the form of a thin thin film, it will have little influence on the separation distance of the display module 14. [

With such an assembling structure, the display module 14 is coupled to the front panel 11 in a spaced apart state. The back cover 15 may be indirectly coupled via the display module 14 without being directly coupled to the back surface of the front panel 11. [ Further, the edge of the front panel 11 is not covered with the back cover 16 or other members, but is exposed to the outside. Therefore, the display device is not only larger than the actual size, but also has the advantage that the appearance is neatly designed.

Meanwhile, the disassembly process of the display device 10 is performed in the reverse order of the assembling process.

1 is a front perspective view of a display device according to an embodiment of the present invention;

2 is a view schematically showing the principle of a concave lens;

3 is a view showing a principle of a Fresnel lens applied to an idea of the present invention.

4 is a partial cross-sectional view illustrating a configuration of a front panel and a shielding member for defining an image non-display area provided on a front surface of a display device according to an embodiment of the present invention.

5 is a view showing optical phenomena appearing on a front panel of a display device having an optical path changing unit according to an embodiment of the present invention.

6 is a perspective view of a display device showing a state in which an image non-display area is reduced in a state in which an image is output from the display module.

7 is an exploded perspective view of a display device having an optical path changing unit according to an embodiment of the present invention.

8 is a cross-sectional view taken along line I-I 'of FIG. 6, and is a sectional view showing an assembled state of a display device provided with a light path changing portion.

Claims (8)

A display module for outputting an image; A transparent front panel coupled to the front of the display module and covering the entire front surface of the display module and having a rim exposed to the outside; A shielding member attached to a rear surface of the front panel, the shielding member having a predetermined width at an edge of the front panel and surrounding the rim of the front panel; A module bracket attached to the shielding member and fixed to a back surface of the front panel, the module bracket supporting the display module; And And a back cover that covers the front surface of the front panel and protects the display module, Wherein the front panel is divided into an image non-display area defined by the shielding member and an image display area defined in an inner space of the shield member, A light path changing portion for changing the light path is formed at an edge portion of the front panel corresponding to an outer edge region of the image non-display region, Wherein the light path changing portion formed in the outer edge region of the image non-display region is a prism array in which a plurality of pieces of prism are arranged in the center direction of the image non-display region from the outer edge of the image non- Wherein the light path changing portion formed in the inner edge region of the image non-display region is a prism array in which a plurality of pieces of prism are arranged in the center direction of the image non-display region from the inner edge of the image non- Wherein the refracting surface of the plurality of prism pieces is a refracting surface obtained by flattening a round refracting surface of a concave lens divided into a plurality of segments or a round refracting surface of a concave lens divided into a plurality of segments, And the prism array extends linearly along the rim of the front panel. delete The method according to claim 1, Wherein the back cover is folded forward to form a side surface portion of the display device, the outer side surface of the side surface portion is aligned with the side surface of the front panel, And the display device is located at a position spaced apart by a predetermined distance. The method according to claim 1, Wherein the module bracket is bent to surround a front part and a side part of the display module and is fixed to a rear surface of the front panel by an adhesive member. The method according to claim 1, The module bracket includes: A contact surface attached to the back surface of the front panel, A support surface bent at an end of the contact surface and brought into close contact with a side surface of the display module, And a latching end bent at the end of the supporting surface many times and hooked to the back surface of the display module. 6. The method of claim 5, Wherein the module bracket is made of an elastic material, Wherein when the display module is assembled to the module bracket, the contact surface and the support surface are maintained in an orthogonal state. The method according to claim 1, Further comprising a fastening boss projecting from a rear surface of the display module, Wherein the back cover is fixed to the back surface of the display module by a fastening member inserted through the back cover and inserted into the fastening boss. The method according to claim 1, Wherein the display module is spaced apart from the back surface of the front panel by at least the thickness of the module bracket.

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