KR20140005758A - Display device including lens for expanding display area - Google Patents

Display device including lens for expanding display area Download PDF

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Publication number
KR20140005758A
KR20140005758A KR1020130021172A KR20130021172A KR20140005758A KR 20140005758 A KR20140005758 A KR 20140005758A KR 1020130021172 A KR1020130021172 A KR 1020130021172A KR 20130021172 A KR20130021172 A KR 20130021172A KR 20140005758 A KR20140005758 A KR 20140005758A
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KR
South Korea
Prior art keywords
display
display area
liquid crystal
lens
angle
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KR1020130021172A
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Korean (ko)
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KR102047728B1 (en
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최명조
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엘지디스플레이 주식회사
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems
    • E03B7/072—Arrangement of flowmeters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00—Function characteristic
    • G02F2203/02—Function characteristic reflective

Abstract

The present invention provides a display comprising: at least one display module containing a display area used for image displaying and a surrounding non-display area of the display area; and a display device containing at least one lens which placed on the upper part of at least one display module and outputs the image of display area to front viewing angle and side viewing angle of the non-display area.

Description

Display Device Including Lens For Expanding Display Area

The present invention relates to a display device, and more particularly, to a display device including a lens disposed in front of a display module in order to extend the display area.

Display devices include liquid crystal displays (LCDs), plasma display panels (PDPs), and organic light emitting diodes (OLEDs).

In general, the display device includes a display panel for displaying an image, a driving circuit for supplying power and a signal to the display panel, and a frame that surrounds and integrates the display panel and the driving circuit.

Here, the display device necessarily includes an area that cannot be used for image display, and this area acts as a factor of deteriorating the design and performance of the display device.

1 is a cross-sectional view of a conventional liquid crystal display device.

As shown in FIG. 1, a conventional liquid crystal display device includes a liquid crystal panel 10, a backlight unit 20, a main frame 30, a bottom frame 50, and a top frame 40.

The liquid crystal panel 10 is an image display part, and includes first and second substrates 12 and 14 bonded to each other with a liquid crystal layer interposed therebetween, and first and second substrates 12 and 14. And first and second polarizing plates 19a and 19b respectively attached to the outer surface of the substrate.

The liquid crystal panel 10 includes a display area DA including a plurality of pixel areas, and a black matrix area in which a black matrix is formed to cover a portion that cannot be used for displaying an image such as a link wiring and a pad. (BMA).

The backlight unit 20 is disposed on the rear surface of the liquid crystal panel 10.

The backlight unit 20 includes an LED assembly 29 arranged along a length direction of at least one edge of the main frame 30, a white or silver reflecting plate 25 disposed on the bottom frame 50, and a reflecting plate. (25) It includes a light guide plate 23 disposed on the upper portion, and a plurality of optical sheets 21 disposed on the light guide plate 23.

Here, the LED assembly 29 is configured on one side of the light guide plate 23, and includes a plurality of LEDs 29a emitting white light and an LED printed circuit board 29b on which the LEDs 29a are mounted.

The liquid crystal panel 10 and the backlight unit 20 may include a top frame 40 and a backlight unit 20 that surround the top edge of the liquid crystal panel 10 with the edges surrounded by a rectangular ring-shaped main frame 30. The bottom frame 50 covering the back of each is coupled in the front and rear are integrated through the main frame 30.

Here, when the LCD is viewed from the front, an area corresponding to the top frame 40 is a portion where an image is not displayed, and the entire LCD is a display area DA of the LCD panel 10 displaying an image. And a non-display area NDA that cannot display an image, including an area corresponding to the top frame 40 and a black matrix area BMA of the liquid crystal panel 10.

The non-display area NDA is also referred to as a bezel area, and the bezel area serves as an obstacle for viewing an image displayed by the liquid crystal display device. The smaller the bezel area, the lower the bezel area. Satisfaction rises.

In particular, when displaying a single image by connecting a plurality of display devices such as a multi-vision up, down, left, and right, the bezel area is located in the center of the displayed image, which acts as a large defect in viewing an image.

Although it is preferable to completely remove the bezel area, the bezel area inevitably occurs due to the structure of the liquid crystal panel 10 and the frames 30, 40, and 50, and there is a limit in reducing the bezel area.

The inevitable generation of the bezel area is similarly applied to other display devices such as a plasma display device and an organic light emitting diode display device.

Accordingly, various methods for making the bezel area invisible instead of removing or reducing the bezel area have been proposed, which will be described with reference to the accompanying drawings.

2 is a cross-sectional view of a conventional multi-vision display device including a prism sheet.

As shown in FIG. 2, a conventional multi-vision display device includes first and second display panels 110 and 120 arranged side by side adjacent to each other to display a separate image, and first and second display panels. It includes a prism sheet 130 disposed on the (110, 120).

Each of the first and second display panels 110 and 120 includes a display area DA and a non-display area NDA, and each of the first and second display panels 110 and 120 has a non-display area (a center) adjacent to the first and second display panels 110 and 120. NDA) is arranged.

The prism sheet 130 is disposed to cover the connection portion, which is the non-display area NDA, between the first and second display panels 110 and 120.

Here, the prism sheet 130 serves to shift the images of the first and second display panels 110 and 120 to a central connection area. Specifically, the prism sheet 130 is formed from the first display panel 110. By moving the first image to the right and moving the second image emitted from the second display panel 120 to the left, the first and second images are output in a combined form at the center line of the connection unit.

Therefore, the non-display area NDA of the connection unit is not recognized by the user, and the center bezel area can be removed.

However, in the conventional multi-vision display device including the prism sheet, a problem occurs when a user views an image from a side of the display device rather than from the front side.

In other words, an image corresponding to the non-display area NDA of the connection part is emitted from the side view angle of the display device, or only a part of the first and second images are emitted, thereby causing a sharp deterioration of the image quality.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a display device in which a non-display area is removed and the display area is expanded.

Another object of the present invention is to provide a display device including a lens disposed on an upper portion of the display module to extend and output an image of the display module to the outside.

In order to solve the above problems, the present invention, at least one display module including a display area used for image display and a non-display area around the display area; A display device disposed on the at least one display module, the display device including at least one lens emitting an image of the display area or an image outside the at least one display module to a front view angle and a side view angle of the non-display area; to provide.

The at least one lens may include first to fourth side parts forming a rectangular ring shape; It may include a first to a fourth corner portion connected to two adjacent to the first to fourth side portion.

Each of the first to fourth side parts may include: a first surface corresponding to the display area; A second surface forming a first inclination angle with respect to the first surface and having a shape inclined toward the non-display area; The second surface may include a third surface having a second inclination angle with respect to the first surface and having a shape inclined toward the non-display area.

Each of the first to fourth side parts may further include a reflective layer formed under the third surface, and the first inclination angle may be smaller than the second inclination angle.

In addition, a first ray constituting an image of the display area is incident on the first surface from the at least one display module, proceeds into the at least one lens at a first refractive angle, and then refracts on the second surface. And display the image of the display area at the first viewing angle from the second surface to display the image of the display area at the front viewing angle of the display area, wherein the second light beam constituting the image of the display area is the at least one display module. Is incident from the first surface to the first surface at a second refractive angle, and is totally reflected on the second surface, reflected on the third surface, and refracted on the second surface, to form the second surface. The image may be emitted from the second emission angle to display an image of the display area at the front viewing angle of the non-display area.

The first and second refractive angles may be angles inclined in opposite directions with respect to the normal of the first surface.

In addition, a third ray constituting an image of the display area is incident on the first surface from the at least one display module, proceeds into the at least one lens at a third refractive angle, and then refracts on the second surface. And display the image of the display area at the third viewing angle from the second surface to display the image of the display area at the side viewing angle of the display area, and the fourth light beam constituting the image of the display area is the at least one display module. Is incident from the first surface to the fourth surface at a fourth refraction angle, and then totally reflected on the second surface, reflected on the third surface, and refracted on the second surface, to form the second surface. And an image emitted from the fourth emission angle to display the image of the display area at the side viewing angle of the non-display area.

The third and fourth refractive angles may be angles inclined in opposite directions with respect to the normal of the first surface.

In addition, each of the first to fourth side portions is arranged in a bar shape parallel to each other above the second surface, each wedge including a first upper surface inclined with respect to the second surface. The apparatus may further include a plurality of first protrusion patterns having a shape.

The inclination of the first upper surface with respect to the first surface may be greater than the inclination of the second surface with respect to the first surface.

In addition, each of the first to fourth side portions is arranged in a bar shape parallel to each other below the third surface, each wedge including a second upper surface inclined with respect to the third surface. A plurality of second protrusion patterns having a form may be further included.

The slope of the second upper surface with respect to the first surface may be greater than the slope of the third surface with respect to the first surface.

In addition, each of the first to fourth corner portions may have a streamlined curved shape, or each may extend from the first to fourth side portions to form a bent portion that meets each other at a diagonal of the corner, or the first to fourth corner portions. It may have a form extending from one of the two adjacent of the fourth side.

The at least one display module may include a plurality of display modules disposed to contact each other adjacent to each other, and the at least one lens may include a plurality of lenses respectively disposed on the plurality of display modules. .

In addition, the at least one display module includes: a liquid crystal panel including the display area and a black matrix area formed around the display area; A backlight unit disposed on a rear surface of the liquid crystal panel to supply light to the liquid crystal panel; It may include a main frame, a top frame and a bottom frame surrounding the liquid crystal panel and the backlight unit and modularized.

The non-display area may include the black matrix area, an area corresponding to the main frame, the top frame, and the bottom frame.

The at least one lens may further include: a first surface corresponding to a rear surface of the at least one display module and disposed outside the at least one display module; A second surface forming a first inclination angle with respect to the first surface and having a shape inclined by the at least one display module; It may include a third surface forming a second inclination angle with respect to the first surface and having a shape inclined by the at least one display module.

The first light beam constituting an image outside the at least one display module is incident on the first surface and proceeds to the inside of the at least one lens at a first refractive angle, and is then refracted at the second surface so as to form the first light beam. A second light beam emitted from two surfaces at a first exit angle to display an image outside the at least one display module at the front viewing angle outside the non-display area, and constituting an image outside the at least one display module; Is incident on the first surface and proceeds into the at least one lens at a second refractive angle, and then is totally reflected on the second surface, reflected on the third surface, and refracted on the second surface to make the second The image may be emitted from a plane at a second emission angle to display an image outside the at least one display module at the front viewing angle of the non-display area.

In the present invention, since the image of the display area of the display module is extended to the non-display area by the lens disposed above the display module and is emitted to the front viewing angle and the side viewing angle, the bezel area, which is the non-display area of the display device, is removed. There is an effect of improving the display quality.

In addition, since the image of the display area of the plurality of display modules is extended to the non-display area of the connection portion between the adjacent display modules by the array lens disposed on the plurality of display modules, the images are output at the front and side viewing angles. The non-display area of the center of the device is removed to improve the display quality of the image.

1 is a cross-sectional view of a conventional liquid crystal display device.
2 is a cross-sectional view of a conventional multi-vision display device including a prism sheet.
3 is an exploded perspective view of a liquid crystal display according to a first embodiment of the present invention.
4 is a sectional view of a liquid crystal display device according to the first embodiment of the present invention.
5A is a view showing an optical path of an image emitted to the front of a display area in a liquid crystal display according to a first embodiment of the present invention.
5B is a view showing an optical path of an image emitted to the front of the non-display area in the liquid crystal display according to the first embodiment of the present invention.
FIG. 5C is a view showing an optical path of an image emitted to the front of the display area and the non-display area in the liquid crystal display according to the first embodiment of the present invention; FIG.
FIG. 6A is a view illustrating an optical path of an image emitted at a side view 15 degree viewing angle of a display area in a liquid crystal display according to a first exemplary embodiment of the present invention; FIG.
FIG. 6B is a view showing an optical path of an image emitted at a 15 degree side viewing angle of a non-display area in a liquid crystal display according to a first embodiment of the present invention; FIG.
FIG. 6C is a view illustrating an optical path of an image emitted at a 15-degree viewing angle of the display area and the non-display area in the liquid crystal display according to the first embodiment of the present invention; FIG.
FIG. 7A is a view showing an optical path of an image emitted at a front viewing angle of a non-display area of a liquid crystal display according to a first modification of the first embodiment of the present invention; FIG.
FIG. 7B is a view showing an optical path of an image emitted at the front viewing angle of the non-display area of the liquid crystal display according to the second modification of the first embodiment of the present invention; FIG.
FIG. 8A illustrates luminance distribution according to a front viewing angle of an edge region of a liquid crystal display according to a first exemplary embodiment of the present invention. FIG.
FIG. 8B is a diagram showing luminance distribution according to a side 15 degree viewing angle of an edge region of a liquid crystal display according to a first embodiment of the present invention; FIG.
9 is a perspective view of a part of a liquid crystal display according to a second embodiment of the present invention.
10 is a perspective view of a portion of a liquid crystal display according to a third embodiment of the present invention.
11 is a cross-sectional view of a liquid crystal display device according to a fourth embodiment of the present invention.
12 is a view showing an optical path of an image emitted at the front viewing angle of the non-display area in the liquid crystal display according to the fifth embodiment of the present invention.
13 is a perspective view of a backlight unit according to a sixth embodiment of the present invention.
14 is a perspective view of a backlight unit in a seventh embodiment of the present invention;
15 is a cross-sectional view of a backlight unit according to an eighth embodiment of the present invention;

Hereinafter, a display device according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

3 is an exploded perspective view of the liquid crystal display according to the first embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3 as a cross-sectional view of the liquid crystal display according to the first embodiment of the present invention. .

3 and 4, the liquid crystal display 200 according to the first embodiment includes a liquid crystal panel 210, a backlight unit 220, a main frame 230, a top frame 240, and a bottom. And a display area expansion lens 260 mounted on an upper edge of the liquid crystal display module 205.

Here, the liquid crystal panel 210 is a portion for displaying an image and includes first and second substrates 212 and 214 bonded to each other with a liquid crystal layer interposed therebetween.

Although not shown, in the active matrix type liquid crystal panel 210, a plurality of pixel lines (pixels) are formed on the inner surface of the first substrate 212 called a lower substrate or an array substrate by crossing a plurality of gate wirings and a plurality of data wirings. A region is defined, and a thin film transistor (TFT) and a pixel electrode connected to the thin film transistor are formed in each pixel region.

On the inner surface of the second substrate 214, which is called an upper substrate or a color filter substrate, a color filter of red (R), green (G), and blue (B) corresponding to each pixel region, and a color filter A black matrix is formed around each other and covers elements such as a gate wiring, a data wiring, and a thin film transistor, and a common electrode is formed below the color filter and the black matrix.

In addition, polarizing plates 219a and 219b are formed on outer surfaces of the first and second substrates 212 and 214 to selectively transmit only specific polarizations.

The liquid crystal panel 210 is arranged in the periphery of the display area, such as a plurality of pixel areas, substantially used for image display, and the display area, such as link wiring and pads, and thus cannot be used for image display. It includes a matrix area (BMA), the black matrix formed on the inner surface of the second substrate 214 is formed to correspond not only to the gate wiring, data wiring and thin film transistor but also to the black matrix region (BMA) black matrix region (BMA) Prevent light leakage through

Meanwhile, a printed circuit board (PCB) 217 is connected to at least one edge of the liquid crystal panel 210 through a connecting member 216 such as a flexible circuit board or a tape carrier package (TCP). The printed circuit board 217 is properly inclined and adhered to the side of the main frame 230 or the bottom of the bottom frame 250 during the modularization process.

When the thin film transistor selected for each gate wiring is turned on by the gate signal of the gate driver, the liquid crystal panel 210 transmits the data signal of the data driver to the corresponding pixel electrode through the data wiring. The arrangement direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode, indicating a difference in transmittance.

On the rear surface of the liquid crystal panel 210, a backlight unit 220 is provided to supply light such that a difference in transmittance of the liquid crystal panel 210 is expressed to the outside.

The backlight unit 220 may include an LED assembly 229, a white or silver reflector 225, a light guide plate 223 disposed on the reflector 125, and a plurality of optical sheets disposed on the light guide plate 223. 221).

The LED assembly 229 is disposed on one side of the light guide plate 223 so as to face the light incident surface of the light guide plate 223, and the LED PCBs are mounted to be spaced apart from each other by a plurality of LEDs 229a and a plurality of LEDs 229a. (229b).

Here, the plurality of LEDs 229a include an LED chip (not shown) that emits all the colors of RGB or emits white color, and emits white light toward the light incident surface of the light guide plate 223.

In addition, the plurality of LEDs 229a may include LED chips that emit light having red, green, and blue colors, respectively. White light can also be realized by this.

Meanwhile, the liquid crystal panel 210 and the backlight unit 120 are modularized by the main frame 230, the top frame 240, and the bottom frame 250. The top frame (also referred to as a top cover, a case top, or a top case) The 240 has a rectangular ring shape, the cross section of which is bent in a "b" shape to cover the top edge and side surfaces of the liquid crystal panel 210, and is formed in the liquid crystal panel 210 by opening the front surface of the top frame 240. The image is configured to be displayed.

Also referred to as a bottom cover or a bottom cover, the bottom frame 250, on which the liquid crystal panel 210 and the backlight unit 220 are mounted, is the basis for assembling the entire apparatus of the liquid crystal display device. It has a plate shape of a, and includes a horizontal surface 251 in close contact with the back of the backlight unit 220 and the side surface 253 whose edge is vertically bent upwardly.

The main frame 230, also called a support main, a guide panel, a main support, or a mold frame, has a rectangular ring shape with one edge open, and is mounted on the bottom frame 250 so as to be mounted on the liquid crystal panel 210 and the backlight. The edge of the unit 220 is coupled to the top frame 240 and the bottom frame 250.

Here, when the liquid crystal display module 205 is viewed from the front, regions corresponding to the main frame 230, the top frame 240, and the bottom frame 250 are portions in which an image is not displayed, and the liquid crystal display module 205. ) The whole cannot display an image including the display area DA of the liquid crystal panel 210, the area corresponding to the top frame 240, and the black matrix area BMA of the liquid crystal panel 210. It is divided into a non-display area NDA.

The display area expansion lens 260 is disposed on the liquid crystal display module 205.

The lens 260 has a rectangular ring shape disposed along an upper edge of the liquid crystal display module 205, and has a cross section inclined in an outward direction of the liquid crystal display module 205.

Specifically, the lens 260 is the first between the first to fourth side portions 262a, 262b, 262c, and 262d constituting the rectangular ring shape, and the first to fourth side portions 262a, 262b, 262c, and 262d. To fourth corner portions 264a, 264b, 264c, and 264d, each of the first to fourth corner portions 264a, 264b, 264c, and 264d on two adjacent sides 262a, 262b, 262c, and 262d. It is connected in a streamlined shape with no bends.

Each of the first to fourth side parts 262a, 262b, 262c, and 262d may include a first surface 260a corresponding to an edge of the display area DA of the liquid crystal panel 210 of the liquid crystal display module 205. The second surface 260b and the first surface having a first inclination angle (θ1 of FIG. 5A) with respect to the first surface 260a and inclined toward the non-display area NDA and facing the front side of the liquid crystal display 200. A third inclination (θ 2 of FIG. 5A) with respect to the surface 260a and having a shape inclined from the boundary of the display area DA to the non-display area NDA and facing the rear surface of the liquid crystal display 200. 260c, and a reflective layer 262 is formed under the third surface 260c.

In the liquid crystal display module 205, the black matrix area of the liquid crystal panel 210 and the area covered by the top frame 240 overlap each other to be defined as a non-display area NDA, which is also called a bezel area. The area may not be substantially used for image display and may act as a factor of degrading the quality of the liquid crystal display 200.

In the liquid crystal display device 200 according to the first embodiment of the present invention, the image of the upper edge of the liquid crystal panel 210 is displayed on the front of the display area by the lens 260 disposed on the liquid crystal display module 205. The display quality of the liquid crystal display 200 may be improved by removing the bezel area by emitting the light at the viewing angle and the side viewing angle, and emitting the light at the front viewing angle and the side viewing angle of the non-display area.

The optical paths according to the front and side viewing angles of the image through the lens will be described with reference to the drawings.

FIG. 5A is a view illustrating an optical path of an image emitted at a front viewing angle of a display area in a liquid crystal display according to a first embodiment of the present invention, and FIG. 5B is a view of a liquid crystal display according to the first embodiment of the present invention. FIG. 5C illustrates an optical path of an image emitted at a front viewing angle of a non-display area of FIG. 5C. FIG. 5C is a view illustrating an image emitted at a front viewing angle of a display area and a non-display area of a liquid crystal display according to a first exemplary embodiment of the present invention. It is a figure which shows an optical path.

6A is a view showing an optical path of an image emitted at a side view 15 degrees viewing angle of a display area in a liquid crystal display according to a first embodiment of the present invention, and FIG. 6B is a view showing an optical path according to the first embodiment of the present invention. Side view of the non-display area of the liquid crystal display device FIG. 15 is a view showing an optical path of an image emitted at a viewing angle, and FIG. 6C is a side view of the display area and the non-display area of the liquid crystal display device according to the first embodiment of the present invention. It is a figure which shows the optical path of the image radiate | emitted by a 15 degree viewing angle.

As shown in FIGS. 5A to 5C, the lens 260 is formed with respect to the first surface 260a and the first surface 260a corresponding to the top edge of the liquid crystal panel 210 of the liquid crystal display module 205. A second inclination angle θ1 is formed and a second inclination angle θ2 is formed with respect to the front surface of the liquid crystal display 200, and a second inclination angle θ2 is formed with respect to the first surface 260a. And a fourth surface 260d connecting the third surface 260c and the second and third surfaces 260b and 260c, and a reflective layer 262 is formed under the third surface 260c.

Here, although the lens 260 includes the first to fourth surfaces 260a, 260b, 260c, and 260d as an example, in another embodiment, the lens may be formed so that the second and third surfaces directly meet each other. In this case, the fourth surface is omitted.

The first surface 260a is disposed directly above the display area DA, and a part of the second surface 260b is disposed directly above the display area DA, and the rest of the second surface 260b is disposed above the display area DA. The third surface 260c is disposed directly above the non-display area NDA, and the third surface 260c is disposed directly above the non-display area NDA.

As shown in FIG. 5A, the liquid crystal panel 210 of the liquid crystal display module 205 enters the first surface 260a of the lens 260 and proceeds into the lens 260 at the first refractive angle a1. The first ray R1 is incident on the second surface 260b at the first incident angle b1 and according to the refractive index of the lens 260 and the refractive index of the outside air contacting the lens 260. Is refracted, and exits from the second surface 260b to the first emission angle c1 to display an image at the front viewing angle of the display area DA.

Accordingly, the first light ray R1 of the light rays constituting the image of the liquid crystal panel 210 corresponding to the first surface 260a is the front viewing angle of the display area DA of the liquid crystal display device 200 (the first surface ( 260a) in the 0 degree direction).

As shown in FIG. 5B, the liquid crystal panel 210 of the liquid crystal display module 205 enters the first surface 260a of the lens 260 and proceeds into the lens 260 at the second refractive angle a2. The second light ray R2 is incident on the second surface 260b at a second incident angle b2, and according to the refractive index of the lens 260 and the refractive index of external air contacting the lens 260, the second surface 260b. ) Is totally reflected from the second surface 260b to the first reflection angle d1 to the inside of the lens 260 and is incident on the third surface 260c at the third incident angle b3, and the third surface 260c. Reflected by the lower reflective layer 262, it proceeds from the third surface 260c to the second reflection angle d2 into the lens 260, and then enters the second surface 260b at the fourth incident angle b4. In accordance with the refractive index of the lens 260 and the refractive index of the outside air in contact with the lens 260 is refracted in the second surface 260b, and is emitted from the second surface 260b to the second exit angle (c2), Image with frontal viewing angle of non-display area (NDA) Displays.

Accordingly, the second light ray R2 of the light rays constituting the image of the liquid crystal panel 210 corresponding to the first surface 260a is the front viewing angle of the non-display area NDA of the liquid crystal display device 200 (first surface). It exits in the 0 degree direction with respect to the normal line NL of 260a.

As shown in FIG. 5C showing the first and second rays R1 and R2 together, among the rays constituting the image of the liquid crystal panel 210 corresponding to the first surface 260a of the lens 260. In addition, the first ray R1 traveling into the lens 260 at the first refraction angle a1 is the front viewing angle of the display area DA of the liquid crystal display 200 (normal line NL of the first surface 260a). The second light ray R2 emitted at a zero degree direction with respect to the second refraction angle a2 and traveling inside the lens 260 at the second refraction angle a2 is a front viewing angle of the non-display area NDA of the liquid crystal display 200. It exits to the 0 degree direction with respect to the normal line NL of one surface 260a.

As described above, in the liquid crystal display device 200 according to the first exemplary embodiment of the present invention, an image of a portion of the display area DA is also displayed at the front viewing angle of the non-display area NDA of the liquid crystal display device 200. The shape (eg, black band) of the non-display area NDA of the liquid crystal display module 205 at the front viewing angle may be covered by the image of the display area DA, and as a result, the display of the liquid crystal display device 200 is displayed. The area DA is enlarged to improve the display quality.

Meanwhile, the liquid crystal display 200 displays an image at a side 15 degree viewing angle similarly to an image display according to a front viewing angle.

That is, as shown in FIG. 6A, the liquid crystal panel 210 of the liquid crystal display module 205 is incident on the first surface 260a of the lens 260 to enter the lens 260 at the third refractive angle a3. The advancing third light beam R1 is incident on the second surface 260b at the fifth incident angle b5, and according to the refractive index of the lens 260 and the refractive index of the outside air contacting the lens 260, the second surface 260b. It is refracted at 260b and exits from the second surface 260b at the third exit angle c3 to display an image at a 15 degree side view angle of the display area DA.

Accordingly, the third light ray R3 of the light rays constituting the image of the liquid crystal panel 210 corresponding to the first surface 260a may have a 15-degree viewing angle (first first side) of the display area DA of the liquid crystal display device 200. 15 degrees with respect to the normal line NL of the surface 260a.

As shown in FIG. 6B, the liquid crystal panel 210 of the liquid crystal display module 205 enters the first surface 260a of the lens 260 and proceeds into the lens 260 at the fourth refractive angle a4. The fourth ray R4 is incident on the second surface 260b at the sixth incident angle b6, and according to the refractive index of the lens 260 and the refractive index of external air contacting the lens 260, the second surface 260b. ) Is totally reflected from the second surface 260b to the third reflection angle d3 to the inside of the lens 260 and is incident on the third surface 260c at the seventh incident angle b7, and the third surface 260c. Reflected by the lower reflective layer 262, it proceeds from the third surface 260c to the fourth reflection angle d4 into the lens 260, and then enters the second surface 260b at the eighth incident angle b8. It is refracted by the second surface 260b according to the refractive index of the lens 260 and the refractive index of the outside air in contact with the lens 260, and is emitted from the second surface 260b to the fourth exit angle c4, 15-degree viewing angle on the side of the non-display area (NDA) It indicates the phase.

Accordingly, the fourth light ray R4 of the light rays constituting the image of the liquid crystal panel 210 corresponding to the first surface 260a has a 15-degree viewing angle at the side of the non-display area NDA of the liquid crystal display device 200. 15 degrees with respect to the normal line NL of one surface 260a.

As shown in FIG. 6C showing the third and fourth rays R3 and R4 together, among the rays constituting the image of the liquid crystal panel 210 corresponding to the first surface 260a of the lens 260. The third ray R3 traveling toward the inside of the lens 260 at the third refraction angle a3 is emitted at a 15-degree viewing angle on the side of the display area DA of the liquid crystal display 200, and the fourth refraction angle a4. As a result, the fourth ray R4 traveling into the lens 260 is emitted at a side view 15 degrees of the non-display area NDA of the liquid crystal display 200.

As described above, in the liquid crystal display device 200 according to the first exemplary embodiment of the present invention, an image of a portion of the display area DA is also different from a conventional view even at a side view angle of the non-display area NDA of the liquid crystal display device 200. Is displayed, the shape of the non-display area NDA of the liquid crystal display module 205 at the side viewing angle (for example, a black stripe) can be covered by the image of the display area DA, and as a result, the liquid crystal display device ( The display area DA of 200 is enlarged to further improve display quality.

In conclusion, in the liquid crystal display device 200 according to the first exemplary embodiment of the present invention, an image of the upper edge of the liquid crystal panel 210 is displayed by the lens 260 disposed on the liquid crystal display module 205. The display quality of the liquid crystal display 200 may be improved by removing the bezel area by emitting the light at the front viewing angle and the side viewing angle of the region, and at the same time as the emitting at the front viewing angle and the side viewing angle of the non-display area.

To achieve this effect, the lens is formed such that the first inclination angle θ1 of the first and second surfaces 260a and 260b is smaller than the second inclination angle θ2 of the first and third surfaces 260a and 260c. (260). (θ1 <θ2)

In addition, the first and third refractive angles a1 and a3 of the first and third light beams R1 and R3 emitted to the display area DA may be separated from the normal line NL of the first surface 260a by the liquid crystal panel 210. ), And the second and fourth refractive angles a2 and a4 of the second and fourth light beams R2 and R4 emitted to the non-display area NDA are the first surface 260a. The lens 260 should be configured to be an angle inclined outward from the normal line NL of the liquid crystal panel 210.

That is, the first and second refractive angles a1 and a2 and the third and fourth refractive angles a3 and a4 are angles inclined in opposite directions with respect to the normal line NL of the first surface 260a, respectively. When the inner and outer sides of the liquid crystal panel 210 are defined as positive and negative with respect to the normal line NL of the first surface 260a, respectively, the product of the first and second refractive angles a1 and a2 and the third and fourth refractive angles ( The lens 260 should be configured such that the product of a3 and a4 is negative. (a1 X a2 <0, a3 X a4 <0)

Meanwhile, in FIGS. 5A to 5C and 6A to 6C, the reflective layer 262 is formed under the third surface 260c of the lens 260. However, in other embodiments, the third and seventh incident angles b3 are formed. , b7) is formed when the lens 260 is larger than or equal to the total reflection critical angle at the third surface 260c according to the refractive index of the lens 260 and the refractive index of the outside air contacting the lens 260. The reflective layer 262 under the three surfaces 260c may be omitted.

5A to 5C and 6A to 6C, the first and second refractive angles a1 and a2 and the third and fourth refractive angles a3 and a4 are normals NL of the first surface 260a, respectively. Although the angles are inclined in opposite directions relative to each other, the lens 260 is formed such that the first and second inclination angles θ1 and θ2 are greater than or equal to a specific value in other embodiments. The refraction angles a1 and a2 and the third and fourth refraction angles a3 and a4 are equal to each other with respect to the normal line NL of the first surface 260a (for example, the normals of the first surface 260a) NL) may be an angle inclined toward the inner side of the liquid crystal panel 210).

Meanwhile, in the modified example of the first embodiment of the present invention, the height of the lens can be reduced by forming a pattern on the surface of the lens, which will be described with reference to the drawings.

7A and 7B are diagrams showing optical paths of an image emitted to the front viewing angle of the non-display area of the liquid crystal display according to the first and second modified examples of the first embodiment of the present invention, respectively. The description of the optical path and the same parts as those of the first embodiment will be omitted.

As shown in FIG. 7A, the lens 270 of the first modified example is disposed on the first surface 270a and the first surface 270a corresponding to the top edge of the liquid crystal panel 210 of the liquid crystal display module 205. A second inclination angle θ1 with respect to the second surface 270b facing the front of the liquid crystal display device 200, and a second inclination angle θ2 with respect to the first surface 270a and a rear surface of the liquid crystal display device 200. And a fourth surface 270d connecting the third surface 270c and the second and third surfaces 270b and 270c facing each other, and a plurality of protrusion patterns 272 are formed on the second surface 270b. .

The plurality of protruding patterns 272 may be arranged in a bar shape parallel to each other on the second surface 270b, and each of the plurality of protruding patterns 272 is inclined with respect to the second surface 270b. It may have a wedge shape including (272a).

For example, each of the plurality of protrusion patterns 272 may have an inclination of the top surface 272a with respect to the first surface 270a which is a horizontal plane greater than that of the second surface 270b with respect to the first surface 270a. Specifically, the sides of the tangent of the first and second surfaces 270a and 270b with respect to the second surface 270b may be lower than the sides of the tangent of the second and fourth surfaces 270b and 270d. Can be formed.

Referring to the optical path of the lens 270, the lens 270 is incident from the liquid crystal panel 210 of the liquid crystal display module 205 to the first surface 270a of the lens 270 and at the second refractive angle a2. The second light ray R2 traveling inwardly passes through the second surface 270b and is incident on the upper surface 272a of the plurality of protruding patterns 272 at a second incident angle b2 and the plurality of protruding patterns 272. ) Is totally reflected on the top surface 272a of the plurality of protrusion patterns 272 according to the refractive index of the air and the refractive index of the outside air in contact with the plurality of protrusion patterns 272. Proceed into the lens 270 at the first reflection angle d1 and enter the third surface 270c at the third incident angle b3, and is reflected by the third surface 270c to reflect the second reflection angle from the third surface 270c. The lens 270 is advanced to the inside of the lens 270, and passes through the second surface 270b to be incident on the upper surface 272a of the plurality of protruding patterns 272 at a fourth incident angle b4. With a refractive index of (272) According to the refractive index of the outside air contacting the plurality of protrusion patterns 272, the second surface is refracted by the top surface 272a of the plurality of protrusion patterns 272, and thus the second emission angle is increased from the top surface 272a of the plurality of protrusion patterns 272. c2), and displays an image at the front viewing angle of the non-display area NDA.

Accordingly, the second light ray R2 of the light rays constituting the image of the liquid crystal panel 210 corresponding to the first surface 270a is the front viewing angle of the non-display area NDA of the liquid crystal display device 200 (first surface). It exits in the 0 degree direction with respect to the normal line NL of 270a.

Here, the first and second tilt angles θ1 and θ2 of the lens 270 of the first modified example may be smaller than the first and second tilt angles θ1 and θ2 of the lens 260 of the first embodiment, respectively. As a result, the first height h1 (or thickness) of the lens 270 of the first modified example may be smaller than the height of the lens 260 of the first embodiment.

When the height of the lens 270 is reduced by simply decreasing the first and second inclination angles θ1 and θ2, the incident angle of the second light beam R2 with respect to the second surface 270b is decreased to thereby reduce the second surface 270b. ) May not be totally reflected, or may be reflected from the second surface 270b at a relatively small value of the first reflection angle d1 to prevent the image from being displayed at the front viewing angle of the non-display area NDA.

In order to prevent this, a plurality of protruding patterns 272 including an upper surface 272a having an inclination larger than that of the second surface 270b is formed on the second surface 270b, thereby forming a plurality of protrusion patterns 272a on the upper surface 272a. An incident angle of the second ray R2 may be increased, and as a result, the height of the lens 270 may be decreased.

Accordingly, in the first modification, the thickness of the lens 270 may be further reduced than in the first embodiment, and as a result, slimming of the liquid crystal display 200 may be achieved.

As shown in FIG. 7B, the lens 280 of the second modification includes a first surface 280a and a first surface 280a corresponding to the top edge of the liquid crystal panel 210 of the liquid crystal display module 205. The first inclination angle θ1 is formed with respect to the second surface 280b facing the front of the liquid crystal display device 200, and the second inclination angle θ2 is formed with respect to the first surface 280a and the liquid crystal display device 200 is formed. And a fourth surface 280d connecting the second and third surfaces 280b and 280c facing the rear surface of the upper surface of the second surface 280c, and below the second surface 280b and below the third surface 280c. A plurality of first protrusion patterns 282 and a plurality of second protrusion patterns 284 are formed, respectively.

The plurality of first protrusion patterns 282 may be arranged in a bar shape parallel to each other on the second surface 280b, and each of the plurality of first protrusion patterns 282 may be disposed on the second surface 280b. It may have a wedge shape including an upper surface 282a that is inclined with respect to the upper surface.

For example, each of the plurality of first protrusion patterns 282 has a slope of the top surface 282a with respect to the first surface 280a which is a horizontal plane rather than a slope of the second surface 280b with respect to the first surface 280a. It may be formed to be larger, specifically, the tangential side of the first and second surfaces 280a and 280b with respect to the second surface 280b than the tangential side of the second and fourth surfaces 280b and 280d. It can be formed to be low.

In addition, the plurality of second protrusion patterns 284 may be arranged in a bar shape parallel to each other under the third surface 280c, and each of the plurality of second protrusion patterns 284 may have a third surface 280c. It may have a wedge (Wedge) shape including the top surface 284a inclined with respect to.

For example, each of the plurality of second protrusion patterns 284 has an inclination of the upper surface 284a with respect to the first surface 280a which is a horizontal plane rather than an inclination of the third surface 280c with respect to the first surface 280a. The tangential side of the first and third surfaces 280a and 280c with respect to the third surface 280c may be larger than the tangential side of the third and fourth surfaces 280b and 280d. It can be formed to be high.

Referring to the optical path of the lens 280, the lens 280 is incident on the first surface 280a of the lens 280 from the liquid crystal panel 210 of the liquid crystal display module 205 and the second refractive angle a2. The second ray R2 traveling inwardly passes through the second surface 280b and is incident on the upper surface 282a of the plurality of first protrusion patterns 282 at a second incident angle b2, and the plurality of first rays According to the refractive index of the protrusion pattern 282 and the refractive index of the outside air in contact with the plurality of first protrusion patterns 282 is totally reflected on the upper surface 282a of the plurality of first protrusion patterns 282, the plurality of first protrusion patterns A third reflection is performed on the upper surface 284a of the plurality of second protrusion patterns 284 through the third surface 280c through the third surface 280c from the upper surface 282a of the upper surface 282a to the first reflection angle d1. The lens 280 is incident on the incident angle b3 and reflected from the top surfaces 284a of the plurality of second projection patterns 284 to the second reflection angle d2 from the top surfaces 284a of the plurality of second projection patterns 284. ) And go back to the second page Passing through 280b and incident on the top surface 282a of the plurality of first protrusion patterns 282 at a fourth incident angle b4, the refractive indices of the plurality of first protrusion patterns 282 and the plurality of first protrusion patterns ( The second exit angle c2 is refracted by the upper surfaces 282a of the plurality of first projection patterns 282 according to the refractive index of the outside air in contact with 282, and from the upper surfaces 282a of the plurality of first projection patterns 282. And the image is displayed at the front viewing angle of the non-display area NDA.

Accordingly, the second light ray R2 of the light rays constituting the image of the liquid crystal panel 210 corresponding to the first surface 280a is the front viewing angle (first surface) of the non-display area NDA of the liquid crystal display device 200. (0 degree direction) with respect to the normal line NL of 280a.

Here, the first and second inclination angles θ1 and θ2 of the lens 280 of the second modified example may be smaller than the first and second inclination angles θ1 and θ2 of the lens 260 of the first embodiment, respectively. As a result, the second height h2 (or thickness) of the lens 280 of the second modified example may be smaller than the height of the lens 260 of the first embodiment.

When the height of the lens 280 is decreased by simply decreasing the first and second inclination angles θ1 and θ2, the incident angle of the second light beam R2 with respect to the second surface 280b is decreased to thereby reduce the second surface 280b. ) Is not total reflection or is reflected from the second surface 280b at a relatively small value of the first reflection angle d1 so that the incident angle of the second light beam R2 with respect to the third surface 280c decreases, thereby not being displayed. An image may not be displayed at the front viewing angle of the area NDA.

In order to prevent this, a plurality of first protrusion patterns 282 including an upper surface 282a having an inclination larger than that of the second surface 280b is formed on the upper surface of the second surface 280b, thereby forming an upper surface 282a. A plurality of second protrusion patterns 284 including an upper surface 284a having an inclination greater than that of the third surface 280c and increasing the incident angle of the second ray R2 to the third surface 280c may be increased. By forming the lower portion 280c, the incident angle of the second light beam to the image surface 282c may be increased, and as a result, the height of the lens 280 may be reduced.

Accordingly, in the second modification, the thickness of the lens 280 may be further reduced than in the first embodiment, and as a result, the thickness of the liquid crystal display 200 may be further reduced.

8A and 8B illustrate luminance distributions according to a front viewing angle and a side 15-degree viewing angle of an edge region of a liquid crystal display according to a first exemplary embodiment of the present invention, respectively.

As shown in FIGS. 8A and 8B, although the luminance of the non-display area NDA is slightly lower than that of the display area DA, a sharp drop in the luminance is not observed in the non-display area NDA, and the front viewing angle is observed. There is almost no difference in luminance distribution at the viewing angle of 15 and side.

Therefore, the inherent shape of the non-display area NDA may be covered by an image of a portion of the display area DA at both the front view angle and the side view 15 degree viewing angle.

Also, no sharp drop in luminance is observed at the corners of the non-display area NDA.

Therefore, even in the corner portion of the non-display area NDA, an image of a part of the display area DA may cover an inherent shape of the non-display area NDA.

Therefore, the same effect as that of removing the non-display area NDA of the liquid crystal display device 200 and extending the display area DA can be obtained, and the display quality can be improved.

In the first embodiment of the present invention, each of the corners 264a, 264b, 264c, and 264d of the lens 260 has a streamlined curved shape, but in another embodiment, may have a different shape.

9 and 10 are perspective views of a part of the liquid crystal display according to the second and third embodiments of the present invention, respectively, and have the same configuration as the liquid crystal display according to the first embodiment of the present invention except for the shape of a lens. The description of the same parts is omitted.

As shown in FIG. 9, the lens 360 of the liquid crystal display 300 according to the second exemplary embodiment of the present invention has a rectangular ring shape disposed along an upper edge of the liquid crystal display module 305. The cross section has a form inclined outwardly of the liquid crystal display module 305.

Specifically, the lens 360 includes first to fourth side portions 362a and 362b (not shown) and a first to fourth side portions 362a and 362b (not shown) forming a rectangular ring shape. 4 edge portion 364a (not shown).

Here, each of the first to fourth corner portions 364a (not shown) is connected to two adjacent sides 362a and 362b (not shown) and has a bent portion, specifically, two adjacent sides 362a, 362b (not shown) may be formed to meet each other at a diagonal of the corner.

Even when the lens 360 of this type is used, the non-display area NDA is displayed by using the lens 360 to display a part of the image of the display area DA at the front and side viewing angles of the non-display area NDA. The shape (eg, a black belt) of the image may be covered by an image of the display area DA. As a result, the display area DA of the liquid crystal display device 300 may be enlarged, thereby improving display quality.

As shown in FIG. 10, the lens 460 of the liquid crystal display device 400 according to the third exemplary embodiment has a rectangular ring shape disposed along an upper edge of the liquid crystal display module 405. The cross section has a shape inclined in the outward direction of the liquid crystal display module 405.

Specifically, the lens 460 includes first to fourth side parts 462a and 462b (not shown) constituting a rectangular ring shape.

Here, the first and third side portions 462a (not shown) facing each other are formed to extend to both corners, so that the extension portions of the first and third side portions 462a (not shown) are formed at the edge portions of the first and second embodiments. In another embodiment, instead of the first and third side portions 462a (not shown), the second and fourth side portions 462b (not shown) may be extended to both corners, and the first to fourth sides may be formed. Only one end of each of the two ends 462a and 462b may be extended to the edge.

That is, in the first to fourth sides 462a and 462b, one of two adjacent sides may extend to the edge.

Even when the lens 460 of this type is used, the non-display area NDA is displayed by using the lens 460 to display a part of the image of the display area DA at the front and side viewing angles of the non-display area NDA. The shape (eg, a black band) of the image may be covered by an image of the display area DA. As a result, the display area DA of the liquid crystal display device 400 is enlarged, thereby improving display quality.

11 is a cross-sectional view of a liquid crystal display according to a fourth embodiment of the present invention.

As shown in FIG. 11, the liquid crystal display device 500 according to the fourth embodiment of the present invention is a multi-vision display device, and includes a plurality of liquid crystal display modules 505a, 505b, 505c, 505d and a plurality of lenses 560a, 560b, 560c, and 560d disposed on the plurality of liquid crystal display modules 505a, 505b, 505c, and 505d, respectively.

The plurality of lenses 560a, 560b, 560c, and 560d may be configured independently or in the form of an integrated lens array.

Each of the plurality of liquid crystal display modules 505a, 505b, 505c, and 505d includes a display area DA and a non-display area NDA around the display area DA.

Here, each of the plurality of lenses 560a, 560b, 560c, and 560d has a rectangular ring shape corresponding to an edge portion of the display area DA of each of the plurality of liquid crystal display modules 505a, 505b, 505c, and 505d. For example, the first surface corresponding to the edge portion of the display area DA may have a first inclination angle with respect to the first surface and may be inclined toward the non-display area NDA, and may face the front of the liquid crystal display device 500. A second inclination angle greater than the first inclination angle with respect to the first surface and having a shape inclined from the boundary of the display area DA to the non-display area NDA and facing the rear surface of the liquid crystal display device 500; It includes three surfaces, and a reflective layer is formed below the third surface.

In the liquid crystal display device 500 according to the fourth embodiment of the present invention, a plurality of lenses 560a, 560b, 560c, and 560d are disposed on the plurality of liquid crystal display modules 505a, 505b, 505c, and 505d. The image of the edge portion of each of the plurality of liquid crystal display modules 505a, 505b, 505c, and 505d is emitted to the front and side viewing angles of the display area DA, By emitting the light at the front viewing angle and the side viewing angle, the display quality of the liquid crystal display device 500 may be improved by removing the bezel area that is the boundary of the plurality of liquid crystal display modules 505a, 505b, 505c, and 505d.

Meanwhile, in the first to fourth embodiments, the bezel area is removed by displaying an image of the liquid crystal display device in the non-display area by using a lens inclined inside the liquid crystal display device. The bezel area may be removed by allowing an image outside the liquid crystal display to be displayed on the non-display area using an inclined lens, which will be described with reference to the drawings.

FIG. 12 is a diagram illustrating an optical path of an image emitted at a front viewing angle of a non-display area in a liquid crystal display according to a fifth exemplary embodiment of the present invention, and a description of the same parts as those in the first exemplary embodiment will be omitted.

The lens 660 has a first inclination angle θ1 with respect to the first surface 660a and the first surface 660a which are disposed outside the liquid crystal display device 600 corresponding to the rear surface of the liquid crystal display device 600. The second surface 660b facing the front side of the liquid crystal display device 600 and the third surface 660c facing the rear surface of the liquid crystal display device 600 form a second inclination angle θ2 with respect to the first surface 660a. , The fourth surface 660d connecting the second and third surfaces 660b and 660c, the fifth surface 660e connecting the first and second surfaces 660a and 660b, and the first and third surfaces 660a, And a sixth surface 660f connecting the 660c, and a reflective layer 662 is formed under the third surface 660c.

Herein, the lens 660 includes first to sixth surfaces 660a, 660b, 660c, 660d, 660e, and 660f, but in another embodiment, the lens 660 may directly meet the second and third surfaces. May be formed, in which case the fourth surface is omitted.

The first surface 660a is disposed outside the non-display area NDA, and a part of the second surface 660b is disposed outside the non-display area NDA, and the rest of the second surface 660b is The third surface 660c is disposed directly above the non-display area NDA, and the third surface 660c is disposed directly above the non-display area NDA.

Referring to the optical path of the lens 660, the light incident from the outside of the liquid crystal display device 600 is incident on the first surface 660a of the lens 660 and proceeds into the lens 660 at the first refractive angle a1. The first ray R1 is incident on the second surface 660b at the first incident angle b1, and according to the refractive index of the lens 660 and the refractive index of external air contacting the lens 660, the second surface 660b. Is refracted at, and exits from the second surface 660b to the first emission angle c1 to display an image at a front viewing angle outside the non-display area NDA.

Therefore, the first light ray R1 of the light rays constituting the image outside the liquid crystal display device 600 corresponding to the first surface 660a is the front viewing angle outside the non-display area NDA of the liquid crystal display device 600. It exits from the 0 degree direction with respect to the normal line NL of the 1st surface 660a.

The second light beam R2 incident on the first surface 660a of the lens 660 from the outside of the liquid crystal display device 600 and traveling toward the inside of the lens 660 at the second refractive angle a2 is the second surface. The second incident angle b2 is incident on the second incident angle b2 and totally reflected on the second surface 660b according to the refractive index of the lens 660 and the refractive index of the outside air contacting the lens 660. From the first reflection angle (d1) to the inside of the lens 660 is incident on the third surface (660c) at the third incident angle (b3), is reflected by the reflective layer 662 below the third surface (660c), From the third surface 660c to the second reflection angle d2, the lens 660 is moved into the lens 660 and is incident on the second surface 660b at the fourth incident angle b4. The refractive index of the lens 660 and the lens ( 660b is refracted by the second surface 660b according to the refractive index of the outside air, and exits from the second surface 660b to the second emission angle c2 to display the image at the front viewing angle of the non-display area NDA. Is displayed.

Accordingly, the second light ray R2 of the light rays constituting the image outside the liquid crystal display device 600 corresponding to the first surface 660a is the front view angle of the non-display area NDA of the liquid crystal display device 600 (the It exits from 0 degree direction with respect to the normal line NL of one surface 660a.

As described above, in the liquid crystal display device 600 according to the fifth embodiment of the present invention, an image outside the liquid crystal display device 600 is also displayed at the front viewing angle of the non-display area NDA of the liquid crystal display device 600. The shape of the non-display area NDA of the liquid crystal display 600 at the front viewing angle (for example, a black stripe) may be covered by an image outside the liquid crystal display 600. As a result, the liquid crystal display 600 may be blocked. The display area DA is enlarged to improve the display quality.

FIG. 13 is a perspective view of a backlight unit according to a sixth embodiment of the present invention, and FIG. 14 is a perspective view of a backlight unit in a seventh embodiment of the present invention.

As shown in FIG. 13, the backlight unit 720 according to the sixth embodiment of the present invention includes a rectangular backlight module 725 and a lens 760 mounted on the backlight module 725. .

Although not shown, the backlight module 725 may include a light source (for example, an LED lamp or a fluorescent lamp), a light guide plate, a reflecting plate, a plurality of optical sheets, and the like.

The backlight module 725 may include a light emitting area EA and a non-light emitting area NEA around the light emitting area EA.

Here, the lens 760 corresponds to the entire emission area EA of the backlight module 725. For example, the lens 760 forms a first inclination angle with respect to the first surface and the first surface corresponding to the entire emission area EA. The second surface facing the front surface of the backlight unit 720 and having a second inclination angle larger than the first inclination angle with respect to the first surface has a shape inclined from the center of the light emitting area EA to the non-light emitting area NEA. It has a shape inclined from the boundary of the EA to the non-emission area (NEA) and includes a third surface facing the back of the backlight unit 720, the reflective layer is formed below the third surface.

As illustrated in FIG. 14, the backlight unit 820 according to the seventh exemplary embodiment includes a circular backlight module 825 and a lens 860 mounted on the backlight module 825. Include.

Although not shown, the backlight module 825 may include a light source (for example, an LED lamp or a fluorescent lamp), a light guide plate, a reflector plate, a plurality of optical sheets, and the like.

The backlight module 825 may include a light emitting area EA and a non-light emitting area NEA around the light emitting area EA.

Here, the lens 860 corresponds to the entire light emitting area EA of the backlight module 825. For example, the lens 860 forms a first inclination angle with respect to the first and first surfaces corresponding to the entire light emitting area EA. The second surface facing the front surface of the backlight unit 820 and a second inclination angle larger than the first inclination angle with respect to the first surface are inclined from the center of the light emitting area EA to the non-light emitting area NEA. It has a shape inclined from the boundary of the EA to the non-light emitting area (NEA) and includes a third surface facing the rear surface of the backlight unit 820, a reflective layer is formed below the third surface.

In the backlight units 720 and 820 according to the seventh and eighth embodiments of the present invention, the backlight modules 725 and 825 are disposed by the lenses 760 and 860 disposed on the backlight modules 725 and 825. By emitting the light of the entire light emitting area EA to the front and the side of the light emitting area EA, and also to the front and the side of the non-light emitting area NEA, the bezel area is removed to remove the backlight units 720 and 820. The luminous quality of can be improved.

15 is a cross-sectional view of a backlight unit according to an eighth embodiment of the present invention.

As shown in FIG. 15, the backlight unit 920 according to the eighth embodiment of the present invention includes a plurality of backlight modules 925a, 925b, 925c, and 925d arranged to be in close contact with each other, and a plurality of backlight modules. And a plurality of lenses 960a, 960b, 960c, and 960d respectively disposed above the 925a, 925b, 925c, and 925d.

The plurality of lenses 960a, 960b, 960c, and 960d may be independently configured or may be configured in the form of an integrated lens array.

Although not shown, each of the plurality of backlight modules 925a, 925b, 925c, and 925d may include a light source (for example, an LED lamp or a fluorescent lamp), a light guide plate, a reflector plate, a plurality of optical sheets, and the like.

Each of the plurality of backlight modules 925a, 925b, 925c, and 925d may include a light emitting area EA and a non-light emitting area NEA around the light emitting area EA.

Here, each of the plurality of lenses 960a, 960b, 960c, and 960d corresponds to the entire emission area EA of each of the plurality of backlight modules 925a, 925b, 925c, and 925d, for example. A first inclination angle with respect to the first surface and the first surface corresponding to the whole of EA, and has a shape inclined from the center of the light emitting area EA to the non-light emitting area NEA, and faces the front of the backlight unit 920. The second surface has a second inclination angle greater than the first inclination angle with respect to the first surface, and has a shape inclined from the boundary of the light emitting area EA to the non-light emitting area NEA and toward the rear surface of the backlight unit 920. And a reflective layer is formed below the third surface.

In the backlight unit 920 according to the eighth embodiment of the present invention, by a plurality of lenses 960a, 960b, 960c, and 860d respectively disposed on the plurality of backlight modules 925a, 925b, 925c, and 925d, A plurality of backlight modules 925a, 925b, 925c, and 925d emit the light of the entire light emitting area EA to the front and side of the light emitting area EA, and to the front and side of the non-light emitting area NEA. By emitting the light, the light emitting quality of the backlight unit 920 may be improved by removing the bezel area that is a boundary between the plurality of backlight modules 925a, 925b, 925c, and 925d.

The liquid crystal display device has been described as an example, but the present invention can be applied to other display devices such as a plasma display device and an organic light emitting diode display device.

That is, a display module such as a plasma display device or an organic light emitting diode display device also includes a display area and a non-display area around the display area. By mounting the lens of the present invention on the display module, the non-display area is removed and displayed. The area can be extended, and as a result, the display quality of the image can be improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It can be understood that

200: liquid crystal display device 205: liquid crystal display module
210: liquid crystal panel 220: backlight unit
230: main frame 240: top frame
250: bottom frame 260: lens
DA: display area NDA: non-display area

Claims (19)

At least one display module including a display area used for displaying an image and a non-display area around the display area;
At least one lens disposed on the at least one display module and configured to emit an image of the display area or an image outside the at least one display module at a front viewing angle and a side viewing angle of the non-display area
.
The method of claim 1,
The at least one lens,
First to fourth sides constituting a rectangular ring shape;
First to fourth corner parts connected to two adjacent two first to fourth side parts
.
3. The method of claim 2,
Each of the first to fourth side portions,
A first surface corresponding to the display area;
A second surface forming a first inclination angle with respect to the first surface and having a shape inclined toward the non-display area;
A third surface having a second inclination angle with respect to the first surface and having a shape inclined toward the non-display area
.
The method of claim 3, wherein
Each of the first to fourth side parts may further include a reflective layer formed under the third surface.
The method of claim 3, wherein
The first inclination angle is smaller than the second inclination angle.
The method of claim 5, wherein
The first light beam constituting the image of the display area is incident on the first surface from the at least one display module, proceeds into the at least one lens at a first refractive angle, and is then refracted by the second surface. Emits a first emission angle from a second surface to display an image of the display area at the front viewing angle of the display area,
The second light beam constituting the image of the display area is incident on the first surface from the at least one display module, proceeds into the at least one lens at a second refractive angle, and is totally reflected on the second surface. A display device reflected by the third surface, refracted by the second surface and exiting from the second surface at a second exit angle to display an image of the display area at the front viewing angle of the non-display area.
The method according to claim 6,
The first and second refractive angles are angles inclined in opposite directions with respect to a normal line of the first surface.
The method of claim 5, wherein
The third light beam constituting the image of the display area is incident on the first surface from the at least one display module, proceeds into the at least one lens at a third refractive angle, and is then refracted by the second surface. Emits a third emission angle from a second surface to display an image of the display area at the side viewing angle of the display area,
The fourth light beam constituting the image of the display area is incident on the first surface from the at least one display module, proceeds into the at least one lens at a fourth refractive angle, and is totally reflected on the second surface. A display device reflected by the third surface, refracted by the second surface and exiting from the second surface at a fourth exit angle to display an image of the display area at the side viewing angle of the non-display area.
The method of claim 8,
And the third and fourth refractive angles are angles inclined in opposite directions with respect to the normal of the first surface.
The method of claim 3, wherein
Each of the first to fourth sides may have a wedge shape arranged on a bar shape parallel to each other on an upper portion of the second surface, and each including a first upper surface inclined with respect to the second surface. The display device further comprises a plurality of first projection pattern having.
11. The method of claim 10,
The inclination of the first upper surface with respect to the first surface is greater than the inclination of the second surface with respect to the first surface.
11. The method of claim 10,
Each of the first to fourth sides may have a wedge shape arranged in a bar shape parallel to each other below the third surface, and each of which includes a second upper surface inclined with respect to the third surface. The display device further comprises a plurality of second projection pattern having.
13. The method of claim 12,
The inclination of the second upper surface with respect to the first surface is greater than the inclination of the third surface with respect to the first surface.
3. The method of claim 2,
Each of the first to fourth corner portions may have a streamlined curved shape, may extend from the first to fourth side portions, respectively, and may form a bent portion that meets each other at a diagonal of the corner, or the first to fourth portions. A display device having a form extending from one of two adjacent sides of a side part.
The method of claim 1,
The at least one display module includes a plurality of display modules arranged to be adjacent to each other,
The at least one lens includes a plurality of lenses disposed on the plurality of display modules, respectively.
The method of claim 1,
The at least one display module,
A liquid crystal panel comprising the display area and a black matrix area formed around the display area;
A backlight unit disposed on a rear surface of the liquid crystal panel to supply light to the liquid crystal panel;
A main frame, a top frame, and a bottom frame that enclose and modularize the liquid crystal panel and the backlight unit;
.
17. The method of claim 16,
The non-display area includes the black matrix area and an area corresponding to the main frame, the top frame, and the bottom frame.
The method of claim 1,
The at least one lens,
A first surface corresponding to a rear surface of the at least one display module and disposed outside the at least one display module;
A second surface forming a first inclination angle with respect to the first surface and having a shape inclined by the at least one display module;
A third surface having a second inclination angle with respect to the first surface and having a shape inclined by the at least one display module
.
The method of claim 18,
A first ray constituting an image outside the at least one display module is incident on the first surface and proceeds into the at least one lens at a first refractive angle, and is then refracted by the second surface to be the second surface. Emits a first emission angle from the display to display an image outside the at least one display module at the front viewing angle outside the non-display area,
The second light beam constituting an image outside the at least one display module is incident on the first surface and travels inside the at least one lens at a second refractive angle, and then is totally reflected on the second surface, and the third And a display reflected from the surface, refracted from the second surface, and exiting from the second surface at a second emission angle to display an image outside the at least one display module at the front viewing angle of the non-display area.
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