KR20110103729A - Display apparatus - Google Patents

Abstract

The present invention relates to a display device, the device comprising a display module; A front panel disposed in front of the display module; A first support member comprising a plurality of surfaces formed in a direction crossing each other, the first surface being fixed to the front panel and the second surface being fixed to the display module; And a bezel formed in an outer region of the display device to surround the edge of the front panel.

Description

Display apparatus

The present invention relates to a display device.

As the information society develops, the demand for display devices is increasing in various forms, and in recent years, liquid crystal display devices (LCDs), plasma display panels (PDPs), electro luminescent displays (ELDs), and vacuum fluorescents (VFDs) have been developed. Various display devices such as displays have been studied and used.

Among them, the liquid crystal panel of the LCD includes a liquid crystal layer and a TFT substrate and a color filter substrate facing each other with the liquid crystal layer interposed therebetween, and have no self-luminous power to display an image using light provided from the backlight unit. can do.

An object of the present invention is to provide a structure of a display device that can improve the stability and appearance of the display device.

A display apparatus according to an embodiment of the present invention, a display module; A front panel disposed in front of the display module; A first support member comprising a plurality of surfaces formed in a direction crossing each other, wherein a first surface of the plurality of surfaces is fixed to the front panel and a second surface is fixed to the display module; And a bezel formed in an outer region of the display device to surround the edge of the front panel.

According to the display device according to the exemplary embodiment of the present invention, the exterior of the display device may be provided with a transparent bezel, the width of which decreases toward the rear, thereby improving the appearance of the display device. In addition, it is possible to secure the rigidity of the display device by using one or more bars that can stably fix the structures of the display device.

According to the display device according to another embodiment of the present invention, the thickness of the device can be reduced while simplifying the manufacturing process of the display device by bringing the backlight unit into close contact with the display panel. In addition, by arranging the plurality of light sources in the backlight unit to emit light in different directions, it is possible to provide light of uniform brightness to the display panel, thereby improving the image quality of the display image.

1 is a diagram schematically illustrating a front shape of a display device.
2 is a cross-sectional view showing a simplified configuration of a display device.
3 is a cross-sectional view illustrating a configuration of a display device according to a first embodiment of the present invention.
4 to 11 are cross-sectional views illustrating embodiments of a front panel and a bezel of a display device.
12 is a cross-sectional view illustrating a configuration of a display device according to a second embodiment of the present invention.
13A to 13H are diagrams illustrating an exemplary embodiment of a method of manufacturing the display device illustrated in FIG. 12.
14 is a cross-sectional view illustrating a configuration of a display apparatus according to a third embodiment of the present invention.
15 and 16 are perspective views illustrating a configuration of a display apparatus according to a fourth exemplary embodiment of the present invention.
17 to 21 illustrate embodiments of a configuration of a backlight unit included in a display device.
22 is a cross-sectional view illustrating a configuration of a display apparatus according to a fifth embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings as follows. Hereinafter, the embodiments may be modified in various forms, and the technical scope of the embodiments is not limited to the embodiments described below. The examples are provided to more fully illustrate those skilled in the art. Accordingly, the shape and size of elements in the drawings may be exaggerated for clarity.

FIG. 1 briefly illustrates a display area and a non-display area of a display device, and illustrates a shape when the display device is viewed from the front, that is, the user side.

Referring to FIG. 1, the display apparatus may include a display area 1 in which an image is displayed and a non-display area 2 in which an image is not displayed. The non-display area 2 may be formed in the outer area of the display device in a shape surrounding the display area 1, and a light blocking pattern may be formed in the non-display area 2.

The light shielding pattern formed in the non-display area 2 may block light from passing through the outer area of the display device, so that a structure provided in the outer area of the display device is not visible from the user side in addition to the image to be displayed. can do.

The light shielding pattern formed in the non-display area 2 may have a black color to effectively block light, and may be, for example, a black layer printed in black. Thus, when viewed from the user side, the non-display area 2 of the display device may become black.

FIG. 2 is a schematic cross-sectional view of an embodiment of a display device, and the display device may include a display module 10, a front panel 20, and a light shielding pattern 21.

Referring to FIG. 2, the display module 10 displays an image by emitting light in a front direction in which the front panel 20 is disposed. For example, the display module 10 may be a liquid crystal display module, and in this case, may include a liquid crystal panel (not shown) and a backlight unit (not shown). The liquid crystal panel (not shown) may display an image using light provided from a backlight unit (not shown). For this purpose, the liquid crystal panel (not shown) may face each other with the liquid crystal layer interposed therebetween. And a TFT substrate and a color filter substrate.

However, embodiments according to the present invention are not limited to the above-described liquid crystal display device, and can be applied to various display devices such as plasma display panel (PDP), electro luminescent display (ELD), and vacuum fluorescent display (VFD). have.

The front panel 20 is disposed at the front of the display module 10 at regular intervals to protect the display module 10 from external shocks, and transmits the light emitted from the display module 10 to the display module 10. The image displayed at is displayed from the outside.

For example, the front panel 20 may be made of a plastic or glass material such as PC (polycarbonate) having impact resistance and light transmittance.

As shown in FIG. 2, the front panel 20 transmits light emitted from the display module 10 to display a display area 1 on which an image is displayed and a non-display area 1 surrounding the display area 1. ), And the light blocking pattern 21 for blocking light may be formed in the non-display area 2.

On the other hand, when the display device is powered off, the display area 1 in which no image is displayed has a black color similar to the non-display area 2. However, at this time, reflection, absorption, or scattering of external light incident from the outside may occur differently in the display area 1 and the non-display area 2.

For example, in the display area 1, a part of external light may be reflected by a display panel or the like provided therein, and a portion of the external light may be absorbed in the non-display area 20 in which the black layer is printed. Visual heterogeneity may occur between the display area 10 and the non-display area 20 of FIG. Such a visual heterogeneity may be particularly apparent at the boundary between the display area 1 and the non-display area 2, which may degrade the design characteristics of the display device.

In the display device according to the exemplary embodiment, a metal thin film layer (not shown) may be formed on one surface of the front panel 20 so as to overlap the light blocking pattern 21. That is, the light blocking pattern 21 and the metal thin film layer (not shown) may overlap each other in the non-display area 2 of the front panel 20.

The metal thin film layer (not shown) may be formed by depositing a metal, for example nickel (Ni) or aluminum (Al), on one surface of the front panel 20.

The metal thin film layer (not shown) has both reflective and light-transmitting properties due to the characteristics of the metal and the thin film, thereby allowing a part of the external light incident from the outside to be reflected and partially transmitted.

The light blocking pattern 21 may be a black layer printed in black. For example, the light blocking pattern 21 may be formed by forming a black print layer on a metal thin film layer (not shown) formed on the first surface of the front panel 20.

As described above, as the metal thin film layer 200 has both light reflectivity and transmittance, some of the external light incident on the non-display area is reflected by the metal thin film layer 200 and is emitted back to the front surface, that is, the user side. The remaining part of the external light incident to the area may pass through the metal thin film layer 200 and be absorbed by the light blocking pattern 120.

According to the above configuration, reflection of external light generated in the display area of the display device may occur in the metal thin film layer (not shown) formed in the non-display area, more specifically, the non-display area.

In addition, since some of the external light incident to the non-display area is transmitted through the metal thin film layer (not shown) and absorbed by the light shielding pattern 21, for example, the printed black layer, absorption of external light generated in the display area is also non-display area. In this case, both the display area and the non-display area may become black.

Accordingly, when viewing the display device from the front side, a similar visual reflection can be felt in the display area and the non-display area, which can reduce the visual heterogeneity of the display area 1 and the non-display area 2.

3 is a cross-sectional view showing the configuration of a display device according to a first embodiment of the present invention.

According to the exemplary embodiment of the present invention, the bezel 30 may be formed on the outer region of the display device so as to surround the edge of the front panel 20. As shown in FIG. 3, the bezel 30 may include a portion of which width decreases toward the rear side, for example, the cross-sectional shape of the bezel 30 may be trapezoidal.

On the other hand, the bezel 30 may have a light transmittance, and may be made of a transparent material, for example, a plastic material such as PC (polycarbonate) or acrylic or glass (glass) material.

More specifically, the bezel 30 may be made of the same material as the front panel 20 or may be made of a separate structure separated from the front panel 20 by a different material.

As the transparent bezel 30 has a cross-sectional shape including a portion where the width of the trapezoid or the like gradually decreases, light incident from the rear of the display device, more specifically, from the rear or the side of the bezel 30, can be obtained. This prism effect may cause dispersion or refraction toward the front of the display device.

For example, when light emitted from a separate light source using external light or a light emitting diode (LED) is incident on the rear surface of the transparent bezel 30, the incident light is mutually as shown in FIG. 3. The transparent bezel 30 having two or more non-parallel optical planes can be dispersed or refracted to the front of the display device. Can be improved.

The bezel 30 shape as shown in FIG. 3 is only one embodiment according to the present invention, and thus the present invention is not limited thereto. For example, the bezel 30 may be of various shapes having two or more optical planes that are not parallel to each other that can scatter or refract the light incident from the back or side as described above.

In addition, as shown in FIG. 3, the bezel 30 together with the front panel 20 forms a front appearance of the display device according to an embodiment of the present invention, for example, the front and bezel of the front panel 20. The front surface of 30 may be disposed on substantially the same plane.

Hereinafter, embodiments of the front panel 20 and the bezel 30 included in the display apparatus will be described in detail with reference to FIGS. 4 through 11.

Referring to FIG. 4, the bezel 30 formed in the outer region of the display device may include a first region 31 having a constant width w and a second region 32 decreasing in width toward the rear. Can be. In addition, the first region 31 having a constant width w may be located in front of the second region 32, and thus, as described above, the display device may be slimmer in addition to the dispersion or refraction of light. May have an effect that looks like

According to another embodiment of the present invention, a seating groove 33 for mounting the front panel 20 may be formed in the bezel 30, and the front panel 20 in the seating groove 33 of the bezel 30. ) Is supported and fixed to the front panel 20 and the bezel 30 can be more stably fixed.

Referring to FIG. 5, the front panel 20 may be seated in a seating groove 33 formed in the bezel 30 to support an edge of the front panel 20. For that purpose, the depth d of the seating groove 33 may be equal to or greater than the thickness of the front panel 20.

Meanwhile, as shown in FIG. 6, at least a portion of the seating groove 33 may have a shape in which the width thereof decreases toward the rear, for example, a trapezoidal cross-sectional shape, and thus the edge portion of the front panel 20 may also be formed. It may have a trapezoidal cross-sectional shape so as to correspond to the shape of the seating groove 33.

In addition, the seating groove 33 may have a triangular cross-sectional shape as shown in FIG. 7, so that the edge portion of the front panel 20 also corresponds to the shape of the seating groove 33. Can have

By forming a seating groove 33 supporting the edge of the front panel 20 in the bezel 30 as described above, the bezel 30 can be more firmly fixed to the front panel 20, and At the same time, the gap between the bezel 30 and the front panel 20 can be reduced.

Meanwhile, the bezel 30 and the front panel 20 may be integrally formed as shown in FIG. 8. In this case, the bezel 30 and the front panel 20 may be made of the same material made of a transparent material. .

9 is a cross-sectional view of another embodiment of the configuration of the bezel 30, and the configuration of the bezel 30 and the front panel 20 shown in FIG. The description of the same will be omitted below.

Referring to FIG. 9, light incident from the rear of the bezel 30, for example, external light, may be scattered or refracted at the rear and front surfaces of the bezel 30 that are not parallel to each other, and are distributed to the front surface as described above. Alternatively, the appearance of the display apparatus may be improved by emitting the refracted light to the front surface.

As described above, the bezel 30 surrounds the outer region of the display device, and at the same time, the thickness of the bezel 30, that is, the thickness d2 of the thickest portion of the bezel 30, is used for the dispersion or refraction of light due to the prism effect. It is preferable to be larger than the thickness d1 of the front panel 2.

In addition, as the thickness d2 of the bezel 30 increases, the overall thickness of the display device may increase. As the thickness d2 of the bezel 30 decreases, dispersion and refraction of incident light as described above may be increased. The effect may be lowered.

Therefore, in order to improve the appearance of the display device according to the dispersion and refraction effects of light and not to increase the thickness of the display device significantly, the thickness d2 of the bezel 30 is equal to the thickness d1 of the front panel 20. 2.7 to 6.5 times.

Meanwhile, as the inclination angle θ of the second region 32 of the bezel 30 gradually decreasing in width w to form the inclined rear surface increases, the overall thickness of the display device increases, and the inclination angle θ is increased. As it decreases, the dispersion and refraction effects of the incident light as described above may be lowered.

Therefore, in order to improve the appearance of the display device according to the dispersion and refraction effects of light without greatly increasing the thickness of the display device, the inclination angle θ of the second region 32 of the bezel 30 may be 45 degrees to 60 degrees. have.

In addition, considering the thickness ratio d2 / d1 of the bezel 30 and the front panel 20 and the inclination angle θ of the second region 32 of the bezel 30, the bezel 30 may be formed. The thickness d3 of the thickest portion of the two regions 32 may be 1.7 to 5.5 times the thickness d3 of the first region 31.

According to another embodiment of the present invention, a pattern 34 having a specific pattern may be formed on the rear surface of the bezel 30. As the pattern 34 is formed on the rear surface of the bezel 30 as described above, light that is scattered or refracted forward by the bezel 30 may exhibit a specific pattern by the pattern 34, thereby displaying the display. The appearance of the device can be further improved.

For example, the pattern 34 may be formed by imprinting a shape of a specific pattern on a rear surface of the bezel 30 using a mold or the like, and a pattern imprinted with the specific pattern from the rear or side surface of the bezel 30. As light enters 34 and is dispersed or refracted, the user may observe a pattern corresponding to the pattern 34 from the front of the display apparatus.

Referring to FIG. 10, a plurality of embossed patterns 35 may be formed by processing the rear surface of the bezel 30 using injection or the like. Meanwhile, referring to FIG. 11, a plurality of intaglio patterns 35 may be formed by processing the rear surface of the bezel 30 using injection or the like.

As described above, light incident to the rear surface of the bezel 30 may be scattered by the embossed or intaglio patterns 35 or 36, and thus the user may observe more natural light from the front of the display device. .

12 is a cross-sectional view illustrating a configuration of a display apparatus according to a second exemplary embodiment of the present invention, and descriptions of the same elements as those described with reference to FIGS. 1 to 11 of the display apparatus illustrated in FIG. 12 are omitted below. Let's do it.

According to one embodiment of the invention, a support member for fixing the front panel 20 to the front of the display module 10 may be formed on the side of the display module 10.

Referring to FIG. 12, the display module 10 may include a display panel 100, a backlight unit 200, and an optical sheet 250, and a back cover may be provided at the rear of the display module 10. 40 may be located.

Meanwhile, a first support member 300 for fixing the front panel 20 to the display module 10 may be located at the side of the display module 10.

More specifically, the first support member 300 may be attached to the front panel 20 on which the light shielding pattern 301 is formed using the adhesive member 301, and the display module 10 using the fixing member 302. It can be connected with.

By the first support member 300, the adhesive member 301, and the fixing member 302 as described above, the front panel 20 may be supported and fixed to the front surface of the display module 10, and the display module 10 ) And the front panel 20 to reduce the overall thickness of the display device.

For example, the first support member 300 may be a bar extruded in an 'L' shape using a metal such as aluminum (Al), and thus the display module 10 and the front panel 20 may be formed. ) And the rigidity of the display device can be improved. Meanwhile, the fixing member 302 for fixing the display module 10 to the first supporting member 300 may be a screw formed to penetrate the first supporting member 300.

In addition, the rear surface of the front panel 20 may be etched or film laminated to prevent stain.

Meanwhile, in the display apparatus according to the exemplary embodiment of the present invention, a second support member 310 connected to the first support member 300 to form a rear surface of the display apparatus together with the back cover 40 may be located.

The second support member 310 is connected to the first support member 300 to further improve the rigidity of the display device and prevent the first support member 300 and the fixing member 302 from being exposed from the rear side. can do. Similar to the first support member 300, the second support member 310 may be an extruded bar having an 'L' shape made of a metal such as aluminum (Al).

On the other hand, the transparent bezel 30 as described above may be formed in the outer region of the display device to surround the second support member 300, it is connected to the front panel 20 using the mounting groove 33 to be fixed Can be.

As shown in FIG. 12, the depth d of the mounting groove 33 formed in the bezel 30 may be smaller than the thickness d1 of the front panel 20.

Hereinafter, an embodiment of the manufacturing method of the display device illustrated in FIG. 12 will be described with reference to FIGS. 13A to 13H.

Referring to FIG. 13A, a light shielding pattern 21 may be formed by first printing a black layer on a rear outer area of the front panel 20 made of a transparent material such as a PC, for example, a non-display area.

Thereafter, as illustrated in FIG. 13B, an adhesive is applied to the rear surface of the front panel 20 on which the light blocking pattern 21 is formed to form an adhesive member 301 to which the first support member 300 may be adhesively fixed. can do.

As shown in FIG. 12, the region where the adhesive member 301 is formed may overlap with the region where the light shielding pattern 21 is formed. For example, the adhesive may be applied in the region where the light shielding pattern 21 is formed. have.

Referring to FIG. 13C, the first support member 300 may be adhered to and fixed to the rear surface of the front panel 20 on which the adhesive member 301 is formed.

As shown in FIG. 13D, the display module 10 fixed to the back cover 40 is inserted and positioned in an area in which the first support member 300 is formed, and then a screw or the like is illustrated in FIG. 13E. The side of the display module 10 may be fixed to the first support member 30 using the fixing member 302 of FIG.

Referring to FIG. 13F, the second support member 301 is coupled to the first support member 300 to which the display module 10 is fixed from the rear to strongly fix the display module 10 and the front panel 20. Can be.

Referring to FIG. 13H, as shown in FIG. 13G, a bezel having the configuration as described above may be formed at an edge of the front panel 20 fixed to the display module 10 by the first and second support members 300. 30) can be inserted and fixed.

For example, by using the mounting groove 33 of the bezel 30 as described above, the bezel 30 can be inserted into the edge portion of the front panel 20 to connect the front panel 20 and the bezel 30. have.

FIG. 14 is a cross-sectional view illustrating a configuration of a display apparatus according to a third embodiment of the present invention, and descriptions of the same elements as those described with reference to FIGS. 1 to 13 are omitted below. Let's do it.

Referring to FIG. 14, a support member 300 for fixing the front panel 20 to the display module 10 may be positioned at a side of the display module 10. More specifically, the support member 300 may be attached to the front panel 20 using the adhesive member 301.

For example, the support member 300 may be a bar extruded in an 'L' shape using a metal such as aluminum (Al), and thus, may be disposed between the display module 10 and the front panel 20. It is possible to improve the fixing and rigidity of the display device.

On the other hand, according to another embodiment of the present invention, the fixing member 302 for fixing the display module 10 to the support member 300 to connect the display module 10 and the front panel 20 is the back cover 40 It can be formed through).

For example, as shown in FIG. 14, the fixing member 302 may be a screw coupled to the supporting member 300 after passing through the back cover 40.

According to another embodiment of the present invention, as shown in FIG. 14, the front filter 20 may be formed on the front side of the display device, and the bezel 30 may be coupled to the rear of the front panel 20.

15 and 16 illustrate a display device according to another embodiment of the present invention.

Referring to FIG. 15, the display apparatus includes a display module 10, a front cover 45 and a back cover 40 surrounding the display module 10, a driver 55 and a driver provided in the back cover 40. 55 may include a driving part cover 50.

The front cover 45 may include a front panel made of a transparent material that transmits light, and the front panel protects the display module 10 at regular intervals and transmits the light emitted from the display module 10 to display the display panel 10. The image displayed in the module 10 is displayed externally.

In addition, the front cover 45 may be made of a flat plate without a window. In this case, the front cover 45 is made of a transparent material that transmits light, for example, injection molded plastic. In this way, when the front cover 45 is formed into a flat plate, the frame can be removed from the front cover 45. The back cover 40 may be combined with the front cover 45 to protect the display module 10.

The driving unit 55 may be disposed on one surface of the back cover 40. The driving unit 55 may include a driving control unit 55a, a main board 55b, a power supply unit 55c, and the like. For example, the driving controller 55a may be a timing controller. The driving controller 55a may be a driver for adjusting operation timing of each driver IC of the display module 20, and the main board 55b may be a V sink, an H sink, and a timing controller. The driving unit transmits R, G, and B resolution signals, and the power supply unit 55c is a driving unit that applies power to the display module 10.

The driver 55 may be provided in the back cover 40 and may be wrapped by the driver cover 50. The back cover 40 may include a plurality of holes to connect the display module 10 and the driver 55. In addition, a stand 60 supporting the display device may be provided.

On the other hand, as shown in FIG. 16, the driving control unit 55a of the driving unit 55 may be provided in the back cover 40, and the main board 55b and the power board 55c may be provided in the stand 60. have. In addition, the driving unit cover 50 may wrap only the driving unit 55 provided in the back cover 40.

In the present embodiment, the main board 55b and the power board 55c are separately configured, but may be formed as one integrated board, but is not limited thereto.

17 to 35 illustrate embodiments of a configuration of a backlight unit included in a display device according to an exemplary embodiment of the present invention.

The display module 10 may include a display panel 100 and a backlight unit 200. More specifically, the display module 100 may include a backlight unit 200 extended along the display panel 100, and the backlight unit 200 corresponds to an area of the display panel 100 displaying an image. Can be located on the lower side. For example, the size of the backlight unit 200 may be the same as or similar to the size of the display panel 100.

According to the exemplary embodiment of the present invention, the display apparatus may be configured by closely placing the backlight unit 200 on the rear surface of the display panel 100.

For example, the backlight unit 200 may be adhered to and fixed to the lower side of the display panel 100, more specifically, the lower polarizer, and an adhesive layer (not shown) is provided between the lower polarizer and the backlight unit 200. This can be formed.

By forming the backlight unit 200 in close contact with the back of the display panel 100 as described above, it is possible to improve the appearance by reducing the overall thickness of the display device, by removing the structure for fixing the backlight unit 200 The structure and manufacturing process of the display device can be simplified.

In addition, by removing the space between the backlight unit 200 and the display panel 100, it is possible to prevent the malfunction of the display device due to the insertion of foreign matters into the space or the degradation of the image quality of the display image.

According to an exemplary embodiment of the present invention, the backlight unit 200 may be configured in a form of a plurality of functional layers stacked, and at least one of the plurality of functional layers may include a plurality of light sources (not shown). Can be.

In addition, as described above, in order for the backlight unit 200 to be closely fixed to the lower surface of the display panel 100, the plurality of layers constituting the backlight unit 200, more specifically, the backlight unit 200 may be provided. It is preferable that each is made of a flexible material.

According to an exemplary embodiment of the present invention, the display panel 100 may be divided into a plurality of areas, and the display panel 100 may be divided from areas of the backlight unit 200 corresponding to gray peak values or color coordinate signals of each of the divided areas. The brightness of the emitted light, that is, the brightness of the corresponding light source, may be adjusted to adjust the brightness of the display panel 100.

To this end, the backlight unit 200 may be divided into a plurality of divided driving regions corresponding to each of the divided regions of the display panel 100.

Referring to FIG. 17, the backlight unit 200 may include a first layer 210, a light source 220, a second layer 230, and a reflective layer 240.

Referring to FIG. 17, a plurality of light sources 220 are formed on the first layer 210, and a second layer 230 is disposed on the first layer 210 so that the plurality of light sources 220 are disposed. It may be formed to surround. Preferably, the second layer 230 may completely surround the plurality of light sources 220 formed in the first layer 210, and as another example, the second layer 230 may be applied to the first layer 210. Only specific portions or specific surfaces of the formed plurality of light sources 220 may be wrapped.

The first layer 210 may be a substrate on which the plurality of light sources 220 are mounted, and an adapter (not shown) for supplying power and an electrode pattern (not shown) for connecting the light source 220 may be formed. Can be. For example, a carbon nanotube electrode pattern (not shown) for connecting the light source 220 and the adapter (not shown) may be formed on an upper surface of the substrate.

Meanwhile, the first layer 210 may be a printed circuit board (PCB) substrate on which a plurality of light sources 220 are mounted by using polyethylene terephthalate, glass, polycarbonate and silicon, and formed in a film form. Can be.

The light source 220 may be one of a light emitting diode (LED) chip or a light emitting diode package having at least one light emitting diode chip. In this embodiment, a light emitting diode package is provided as the light source 220.

Meanwhile, the LED package constituting the light source 220 may be divided into a top view method and a side view method according to a direction in which the light emitting surface is directed, and the light source 220 according to an embodiment of the present invention. Is a top view LED package in which the light emitting surface is the upper side of the LED package (e.g., light is emitted upward or in a vertical direction) and the emitting surface is the upper side of the LED package (e.g. the side It can be configured using at least one of the side view of the LED package (the light is emitted in a direction or a horizontal direction).

In addition, the light source 220 may be a colored LED or a white LED emitting at least one of colors such as red, blue, and green. In addition, the colored LED may include at least one of a red LED, a blue LED, and a green LED, and the arrangement and emission light of such a light emitting diode may be changed within the technical scope of the embodiment.

Meanwhile, the second layer 230 disposed above the first layer 210 to surround the plurality of light sources 220 transmits and diffuses the light emitted from the light source 220 and simultaneously diffuses the light source. Light emitted from the 220 may be uniformly provided to the display panel 100.

A reflective layer 240 may be formed between the first layer 210 and the second layer 230, for example, an upper surface of the first layer 210 to reflect light emitted from the light source 220. The upper reflective layer 240 of the first layer 21 may reflect the light totally reflected from the boundary of the second layer 230 so that the light emitted from the light source 220 may be spread more widely.

The reflective layer 240 may be formed by dispersing a white pigment such as titanium oxide in a sheet made of a synthetic resin, laminating a metal deposition film on the surface, and dispersing bubbles in order to scatter light in a sheet made of a synthetic resin. In addition, silver (Ag) may be coated on the surface to increase the reflectance. Meanwhile, the reflective layer 240 may be formed by coating the upper surface of the first layer 210 as a substrate.

The second layer 230 may be made of a light transmissive material, for example, silicone or acrylic resin. However, the second layer 230 is not limited to the above materials and may be composed of various resins.

In addition, in order for the light emitted from the light source 220 to be diffused so that the backlight unit 200 has a uniform brightness, the second layer 230 may be formed of a resin having a refractive index of about 1.4 to 1.6.

For example, the second layer 230 may be formed of any one material selected from the group consisting of polyethylene terephthalate, polycarbonate, polypropylene, polyethylene, polystyrene and polyepoxy, silicone, acrylic, and the like.

The second layer 230 may include a polymer resin having a predetermined adhesiveness so as to be in close contact with the light source 220 and the reflective layer 240. For example, the second layer 230 may comprise unsaturated polyester, methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, normal butyl methacrylate, normal butyl methyl methacrylate, acrylic acid, methacrylic acid, Hydroxy ethyl methacrylate, hydroxy propyl methacrylate, hydroxy ethyl acrylate, acrylamide, metyrol acrylamide, glycidyl methacrylate, ethyl acrylate, isobutyl acrylate, normal butyl acrylate, 2 -Acryl-based, urethane-based, epoxy-based, melamine-based, and the like, such as ethyl hexyl acrylate polymer or copolymer or terpolymer.

The second layer 230 may be formed by applying a liquid or gel resin on the upper surface of the first layer 210 on which the plurality of light sources 220 and the reflective layer 240 are formed, and then curing the resin. Alternatively, it may be manufactured separately and bonded to the upper surface of the first layer 210.

On the other hand, as the thickness a of the second layer 230 increases, the light emitted from the light source 200 is spread more widely, so that light having uniform brightness is provided from the backlight unit 200 to the display panel 100. Can be. On the other hand, as the thickness a of the second layer 230 increases, the amount of light absorbed by the second layer 230 may increase, thereby increasing the amount of light provided from the backlight unit 200 to the display panel 100. Luminance may be reduced overall.

Therefore, in order to provide light of uniform brightness without greatly reducing the brightness of the light provided from the backlight unit 200 to the display panel 100, the thickness a of the second layer 230 may be 0.1 to 4.5 mm. Can be.

Hereinafter, the first layer 210 included in the backlight unit 100 is a substrate on which the plurality of light sources 220 are formed, and the second layer 230 is a resin layer composed of a specific resin. The configuration of the backlight unit 200 according to the embodiment of the present invention will be described in detail.

Referring to FIG. 18, a plurality of light sources 220 may be mounted on the substrate 210, and a resin layer 230 covering all or a portion of the light sources 220 may be disposed on the substrate 210. have. Meanwhile, a reflective layer 240 may be formed between the substrate 210 and the resin layer 230, for example, on an upper surface of the substrate 210.

In addition, as shown in FIG. 18, the resin layer 230 may include a plurality of scattering particles 231, and the scattering particles 231 may scatter or refract incident light from the light source 220. The light emitted can be spread more widely.

The scattering particles 231 may be formed of a material having a refractive index different from that of the material of the resin layer 230, and more particularly of the silicon of the resin layer 230 in order to scatter or refract light emitted from the light source 220. Or it may be made of a material having a higher refractive index than the acrylic resin.

For example, the scattering particles 231 may be polymethyl methacrylate / styrene copolymer (MS), polymethyl methacrylate (PMMA), polystyrene (PS), silicon, titanium dioxide (TiO2), silicon dioxide (SiO2). ), Or a combination of the above materials.

On the other hand, the scattering particles 231 may be made of a material having a lower refractive index than the material constituting the resin layer 230, for example, may be formed by forming a bubble in the resin layer (230). .

In addition, the material constituting the scattering particles 231 is not limited to the above materials, and may be formed using various polymer materials or inorganic particles.

According to an embodiment of the present invention, the resin layer 230 is a first layer in which a plurality of light sources 220 and a reflective layer 240 are formed after mixing the scattering particles 231 in a liquid or a gel-like resin. It may be formed by applying to the upper surface of the 210 and then curing.

Referring to FIG. 18, an optical sheet 250 may be disposed above the resin layer 230. For example, the optical sheet 250 may include one or more prism sheets 251 and / or one or more diffusion sheets 252. ) May be included.

In this case, the plurality of sheets included in the optical sheet 250 may be provided in a state of being adhered or adhered to each other without being spaced apart from each other, thereby reducing the thickness of the optical sheet 250 or the backlight unit 200.

Meanwhile, the lower surface of the optical sheet 250 may be in close contact with the resin layer 230, and the upper surface of the optical sheet 250 may be in close contact with the lower surface of the display panel 100, for example, the lower polarizer 140. have.

The diffusion sheet 252 may diffuse the incident light to prevent the light emitted from the resin layer 230 from being partially concentrated, thereby making the luminance of the light more uniform. In addition, the prism sheet 251 may collect light emitted from the diffusion sheet 252 to allow light to enter the display panel 100 vertically.

According to another embodiment of the present invention, the optical sheet 250 as described above, for example, at least one of the prism sheet 251 and the diffusion sheet 252 may be removed, or the prism sheet 251 and In addition to the diffusion sheet 252 may be configured to further include a variety of functional layers.

In addition, a plurality of holes (not shown) may be formed at a position corresponding to the plurality of light sources 220 in the reflective layer 240, and a plurality of light sources mounted on the lower substrate 210 in the holes. 220 may be inserted.

In this case, the light sources 220 may be inserted below through the holes formed in the reflective layer 240, so that at least a portion of the light sources 220 protrude upward from the reflective layer 240.

As such, the backlight unit 200 is configured by using the structure in which the light sources 220 are inserted into the holes of the reflective layer 240, thereby, between the substrate 210 and the reflective layer 240 on which the light sources 220 are mounted. The fixability of can be improved more.

Meanwhile, each of the light sources 220 provided in the backlight unit 200 has a light emitting surface disposed on a side thereof, and emits light in a lateral direction, for example, a direction in which the substrate 210 or the reflective layer 240 extends. can do.

For example, the plurality of light sources 220 may be configured using a side view LED package, thereby reducing the observation of the light source 220 as a hot spot on the screen. The thickness a of the resin layer 230 may be reduced to reduce the thickness of the backlight unit 200 and further, the display device.

Referring to FIG. 19, a pattern layer including a plurality of patterns 232 may be formed on an upper side of the resin layer 230 of the backlight unit 200 including the light sources 220. The plurality of patterns 232 included in the pattern layer may be formed on the resin layer 230 so as to correspond to positions where the light sources 220 are disposed.

For example, the pattern 232 formed on the resin layer 230 may be a reflective pattern reflecting at least a portion of the light emitted from the light source 220.

As shown in FIG. 19, the reflective pattern 232 may be formed on the resin layer 230 to reduce the luminance of light emitted from the region adjacent to the light source 220, and thus may be uniform from the backlight unit 200. It is possible to emit light of luminance.

That is, the reflective pattern 232 is formed on the resin layer 230 so as to correspond to the position where the plurality of light sources 220 are disposed, and selectively reflects the light emitted upward from the light source 220. The luminance of the light emitted from the region adjacent to) may be reduced, and the reflected light may diffuse in the lateral direction.

More specifically, the light emitted from the light source 220 in the upward direction is diffused in the lateral direction by the reflective pattern 232 and reflected downwardly, and the light reflected from the reflective pattern 232 is the reflective layer 240. By diffusing in the lateral direction again can be reflected in the upward direction. That is, the reflective pattern 232 may reflect 100% of the incident light, or may reflect some of the incident light and pass some of the incident light. As such, the properties of the reflective pattern 232 can be adjusted by controlling the transmission of light through the resin layer 230 and the reflective pattern 232.

Accordingly, the light emitted from the light source 220 may be diffused widely in the lateral direction and other directions without being concentrated upwards, and thus light of more uniform brightness may be emitted from the backlight unit 200.

The reflective pattern 232 may include a reflective material such as a metal, and may include a metal having a reflectance of 90% or more, for example, aluminum, negative, or gold. For example, the reflective pattern 232 may be made of a material or shape such that about 10% or less of the total incident light is transmitted and the rest is reflected.

In this case, the reflective pattern 232 may be formed by depositing or coating the metal as described above. Alternatively, the reflective ink including the metal may be formed according to a predetermined pattern, for example, silver ink. The reflective pattern 232 may be formed by printing.

In addition, in order to improve the reflection effect of the reflective pattern 232, the color of the reflective pattern 232 may have a color having a high brightness, for example, a color close to white, more specifically, than the resin layer 230. The brightness may have a high color.

The reflective pattern 232 may include a metal oxide, for example, titanium dioxide (TiO ₂ ). More specifically, the reflective ink including titanium dioxide (TiO ₂ ) may be printed according to a predetermined pattern to form the reflective pattern 232.

On the other hand, forming the plurality of reflective patterns 232 to correspond to the position of the light sources 220, respectively, as shown in Figure 19, the center of the reflective pattern 232 of the light source 220 corresponding thereto In addition to the case where the center is formed to match the center, the center of the reflective pattern 232 may be formed to be spaced apart from the center of the light source 220 corresponding thereto.

Referring to FIG. 20, the plurality of light sources 220 and 221 included in the backlight unit 200 may be divided into a plurality of arrays, for example, a first light source array A1 and a second light source array A2. Can be.

The first light source array A1 and the second light source array A2 may each include a plurality of light source lines formed by the light sources. For example, the first light source array A1 consists of a plurality of lines L1 each including two or more light sources, and the second light source array A2 includes a plurality of lines each including two or more light sources ( L2).

The light source lines included in the first light source array A1 and the light source lines included in the second light source array A2 may be alternately arranged to correspond to the display area of the display panel 100.

As another embodiment of the present invention, the first light source array A1 is configured to include odd-numbered light source lines from an upper side among a plurality of light source lines formed by the plurality of light sources, and the second light source array A2 is on the upper side. It can be configured to include even light source lines from.

The first light source line L1 included in the first light source array A1 and the second light source line L2 included in the second light source array A2 are disposed vertically adjacent to each other, and the first light source line L1 is disposed. ) And the second light source line L2 may be alternately arranged to constitute the backlight unit 200.

In addition, the light source 220 included in the first light source array A1 and the light source 222 included in the second light source array A2 may emit light in the same direction or may emit light in different directions. Can be.

Referring to FIG. 20, the backlight unit 200 may include two or more light sources emitting light in different directions.

That is, the light sources 220 included in the first light source array A1 and the light sources 222 included in the second light source array A2 may emit light in different directions. The direction in which the light emitting surfaces of the light sources 220 included in A1 face and the direction of the light emitting surfaces of the light sources 222 included in the second light source array A2 may be different from each other.

In more detail, the light emitting surface of the first light source 220 and the second light source 221 included in the first light source array A1 and the light emitting surface of the third light source 222 included in the second light source array A2. The first light source 220 and the second light source 221 included in the first light source array A1 and the second light source array A2 may be formed to face in opposite directions. The third light source 222 may emit light in directions opposite to each other.

In this case, the light sources provided in the backlight unit 200 may emit light in a lateral direction, respectively, and may be configured by using a side view type LED package.

Meanwhile, the plurality of light sources provided in the backlight unit 200 may be arranged to form two or more rows, and the two or more light sources arranged in the same row may emit light in the same direction.

For example, the second light source 221 adjacent to the first light source 220 also emits light in the same direction as the first light source 220, that is, the x-axis direction, and the light sources adjacent to the third light source 222 may also be used. Light may be emitted in the same direction as the third light source 222, that is, in a direction opposite to the x-axis direction.

As described above, the light emission directions of the light sources disposed in the y-axis direction, for example, the second light source 221 and the third light source 222 are formed in opposite directions to each other, so that a specific area of the backlight unit 200 is formed. The phenomenon in which the brightness of light is concentrated or weakened can be reduced.

That is, the light emitted from the second light source 221 may be weakened as it proceeds to an adjacent light source, and thus the farther away from the second light source 221, the brightness of light emitted toward the display panel 100 in the corresponding area. Can be weakened.

Accordingly, by reversing the directions in which light is emitted from each of the second light source 221 and the third light source 222, the luminance of light is concentrated in an area adjacent to the light source and the luminance of light is weakened in an area far from the light source. As a result, the luminance of light emitted from the backlight unit 200 may be uniform.

In addition, the first light source line L1 included in the first light source array A1 and the second light source line L2 included in the second light source array A2 do not correspond to the left and right positions of the light sources, and alternate with each other. It may be disposed in the form, thereby improving the uniformity of the light emitted from the backlight unit 200.

That is, the third light source 222 included in the second light source array A2 may be disposed to be diagonally adjacent to the first light source 220 or the second light source 221 included in the first light source array A1. Can be.

21 to 28 are enlarged views of region P of FIG. 20.

Referring to FIGS. 21 and 22, two light source lines included in the first light source array A1 and the second light source array A2 and formed to be adjacent to each other, for example, the first light source line L1 and the first light source line L1 and the second light source line A1 and the second light source array A1, respectively. The two light source lines L2 may be spaced apart by a predetermined interval.

The first light source 220 may be disposed in the first light source array A1 to emit light in one direction. In addition, a second light source 221 disposed adjacent to the first light source 220 and disposed on the same horizontal line L1 as the first light source 220 and emitting light in the same direction as the first light source 220 may be provided. Can be arranged. Here, the horizontal line L1 may be a line extending in the x-axis direction.

A third light source 222 may be disposed in the second light source array A2 to emit light in a direction opposite to the first light source 220. The third light source 222 may be disposed between the first light source 220 and the second light source 221, and may be disposed diagonally with the first light source 220 or the second light source 221.

The third light source line L3 formed in the first light source array A1 may be spaced apart from the second light source line L2 by a predetermined interval. Light is emitted to the third light source line L3 in the same direction as the second light source 221, is perpendicular to the direction in which the light of the second light source 221 is emitted, and is perpendicular to the second light source 221 ( The fourth light source 223 may be disposed on ℓ2.

In addition, the third light source 222 may be disposed between the second light source 221 and the fourth light source 223, which bisects the distance d1 between the second light source 221 and the fourth light source 223. It may be disposed on the horizontal line (L3).

In addition, the third light source 222 may be disposed adjacent to the line ℓ2 perpendicular to the second light source 221, and may be disposed in a direction opposite to the direction in which the light of the second light source 221 is emitted. .

Here, the light directivity angle θ from the light source and the light directivity angle θ ′ in the second layer 230 may have a relationship as shown in Equation 1 according to Snell's law.

On the other hand, considering that the portion where the light is emitted from the light source is the air layer (refractive index n1 is '1'), and in general, the direction angle θ of the light emitted from the light source is 60 degrees, The light directivity angle θ 'in the layer 230 may have a value as shown in Equation 2 below.

In addition, when the second layer 230 is composed of an acrylic resin series such as polymethyl metaacrylate (PMMA), since the second layer 230 has a refractive index of about 1.5, the optical directivity angle in the second layer 230 according to Equation 2 θ ') may be about 35.5 degrees.

As described above with reference to Equations 1 and 2, the direction angle θ 'at which light is emitted from the light source in the second layer 230 may be less than 45 degrees, whereby the light emitted from the light source may be The range of travel in the y-axis direction may be smaller than that in the x-axis direction.

Accordingly, the third light source 222 may be disposed on a horizontal line l3 that bisects the distance d1 between the second light source 221 and the fourth light source 223, and thus emits from the backlight unit 200. The luminance of the light to be made may be uniform.

Meanwhile, referring to FIG. 22, the first light source 220, the second light source 221, and the third light source 222 may be spaced apart from each other by a predetermined distance.

In more detail, the first light source 220 and the second light source 221 have a first distance d2 which is a distance between the light emitting surface of the first light source 220 and the opposite surface of the light emitting surface of the second light source 221. Can have The first light source 220 and the third light source 222 may have a second distance d3 which is a distance between the center of the light emitting surface of the first light source 220 and the center of the light emitting surface of the third light source 222. Can be. In addition, the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222 may have a third distance d4.

Here, the first distance d2, which is a distance between the center of the light emitting surface of the first light source 220 and the center of the opposite surface of the light emitting surface of the second light source 221, is equal to the center of the light emitting surface of the first light source 220. It may be smaller than or equal to the second distance d3 which is a distance between the centers of the light emitting surfaces of the third light source 222.

The first distance d2, which is the distance between the center of the light emitting surface of the first light source 220 and the center of the opposite surface of the light emitting surface of the second light source 221, is the center of the light emitting surface of the first light source 220 and the third distance. If less than the second distance d3, which is the distance between the centers of the light emitting surfaces of the light source 222, the area where the light emitted from the first light source 220 and the light emitted from the third light source 222 overlap is reduced. It is possible to prevent uneven brightness. In addition, the third distance d4, which is a horizontal distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222, is reduced to reduce the distance between the second light source 221 and the third light source 222. It is possible to prevent the luminance from darkening in the region.

In other words, as illustrated in FIG. 23, an area in which the light emitted from the first light source 220 and the light emitted from the third light source 222 overlap each other may be removed to prevent uneven luminance.

Further, the first distance d2, which is a distance between the center of the light emitting surface of the first light source 220 and the center of the opposite surface of the light emitting surface of the second light source 221, is equal to the center of the light emitting surface of the first light source 220. If the distance equal to the second distance d3 which is the distance between the centers of the light emitting surfaces of the third light source 222 is equal to, the area where the light emitted from the first light source 220 and the light emitted from the third light source 222 overlaps with each other. The third distance d4, which is a horizontal distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222, may be maximized. That is, the overlapping of light between the first light source 220 and the third light source 222 light source can be minimized, and the occurrence of dark parts in the region between the second light source 221 and the third light source 222 is minimized. There is an advantage to this.

In other words, as shown in FIG. 24, the area in which the light emitted from the first light source 220 and the light emitted from the third light source 222 overlap each other is minimized, and the second light source 221 and the third light source are minimized. There is an advantage in that brightness in the area between the light sources 223 can be minimized.

Therefore, the backlight unit according to an embodiment of the present invention has an advantage of providing uniform luminance over the entire surface of the backlight unit.

25 and 26, in the second light source 221 and the third light source 222, the emission surface of the second light source 221 and the emission surface of the third light source 222 are the same vertical line l 4. It may be arranged to be positioned on. That is, the third distance d4, which is the distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222, may form a minimum distance.

Thus, as shown in FIG. 26, the dark portion is prevented from occurring between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222, and thus, the backlight unit 200 exhibiting a better brightness uniformity. There is an advantage that can provide.

Meanwhile, in the backlight unit of the present invention, the first layer 210 in which the light source 220 is disposed may be divided into a plurality of parts.

27 and 28 illustrate a backlight unit including two or more first layers 210.

Referring to FIG. 27, the first optical assembly 10A and the second optical assembly 10B having the plurality of light sources 220, 221, and 222 disposed on the first layer 210 may be in contact with each other. The plurality of light sources respectively disposed in the first optical assembly 10A and the second optical assembly 10B may be arranged in the same arrangement.

In more detail, the first optical assembly 10A is disposed with a first light source 220 that emits light in one direction, is positioned diagonally with the first light source 220, and the light of the first light source 220 is disposed. The third light source 222 may be disposed to emit light in a direction opposite to the emitted direction.

In addition, a second light source 221 may be disposed on the same horizontal line as the first light source 220 and the second light source 221 may emit light in the same direction as the first light source 220.

As described above with reference to FIG. 22, the first distance d2, which is the distance between the center of the light emitting surface of the first light source 220 and the center of the opposite surface of the light emitting surface of the second light source 221, is the first light source 220. It may be less than or equal to the second distance (d3) that is the distance between the center of the light emitting surface and the center of the light emitting surface of the third light source (222).

In addition, referring to FIG. 27, the third light source 222 disposed in the first optical assembly 10A may be disposed in contact with the side of the first optical assembly 10A, and disposed in the second optical assembly 10B. The second light source 221 may be disposed in contact with the side of the second optical assembly 10B.

Here, the third distance d4 which is the distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222 is equal to the sum of the widths of the second light source 221 and the third light source 222. can do.

In particular, each of the second and third light sources 221 and 222 may have a width of about 1 to 2 mm. Therefore, in the exemplary embodiment of the backlight unit including the plurality of optical assemblies, the minimum distance of the third distance d4, which is the distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222, is defined as It may be equal to the sum of the widths of the second light source 221 and the third light source 222.

29 and 30, the third distance d4, which is a distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222, is the second light source 221 and the third light source. The width t of 222 may be greater than or equal to 2t, and may be less than or equal to 10 times 10t of the width t of the light sources 221 and 222. That is, d4 may be made of 2t to 10t, more preferably d4 may be made of 3t to 8t.

Accordingly, the third distance d4, which is a horizontal distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222, is reduced, so that the distance between the second light source 221 and the third light source 222 is reduced. It is possible to prevent the luminance from darkening in the region of.

Therefore, as described above, the backlight unit according to the present exemplary embodiment may have uneven luminance between the first light source 220 and the third light source 222 or between the second light source 221 and the third light source 222. There is an advantage in that it is possible to provide a backlight unit which exhibits better luminance uniformity.

31 and 32 illustrate a backlight unit according to an embodiment of the present invention.

Referring to FIG. 31, a backlight unit according to an exemplary embodiment may include a plurality of diffusion patterns for facilitating propagation of light emitted from the light source 220 onto an adjacent light source 225 on the reflective layer 240. 241 may be formed. The plurality of diffusion patterns 241 may diffuse or refract the light emitted from the light source 220.

More specifically, referring to FIG. 32, the backlight unit 200 may include two or more light sources emitting light in different directions.

The backlight unit 200 may include a first light source 220 and a second light source 221 that emit light in a direction parallel to the x axis, that is, in the same direction. In addition, a third light source 222 may be disposed to be perpendicular to the x-axis direction in which the first light source 220 is arranged and to emit light in a direction opposite to the first light source 220. That is, the rows in which the first light source 220 and the second light source 221 are arranged and the rows in which the third light source 222 is arranged may cross each other.

Accordingly, by forming the light emission directions of the first light source 220 and the second light source 221 and the third light source 222 in opposite directions, the luminance of light is concentrated in a specific area of the backlight unit 200 or Weakening can be reduced.

In this case, as the light emitted from each of the light sources 220, 221, and 222 proceeds, the luminance may be weakened. Accordingly, the further away from each of the light sources 220, 221, and 222, the more the display panel is directed in the corresponding area. The luminance of the light emitted by the light may be weakened.

Therefore, in the eighth embodiment of the present invention, a plurality of diffusion patterns 241 may be disposed between the light sources 220, 221, and 222. The plurality of diffusion patterns 241 may diffuse or refract the light emitted from the light sources 220, 221, and 222 to emit light of uniform brightness from the backlight unit 200.

The plurality of diffusion patterns 241 may include at least one of a metal or a metal oxide that is a reflective material. For example, aluminum (Al), silver (Ag), gold (Ag), or titanium dioxide (TiO ₂ ) It may be configured to include a metal or a metal oxide having a high reflectance, such as.

In this case, the plurality of diffusion patterns 241 may be formed by depositing or coating the metal or metal oxide on the first layer 210, or may be formed by printing a metal ink. Here, as a deposition method, a vacuum deposition method such as a thermal evaporation method, an evaporation method or a sputtering method may be used, and as a coating or printing method, a printing method, a gravure coating method, or a silk screen method may be used.

In addition, in order to improve the effect of diffusion or refraction of the plurality of diffusion patterns 241, the color of the plurality of diffusion patterns 241 may have a high brightness color, for example, a color close to white.

The plurality of diffusion patterns 241 may include a plurality of dots each including the material. For example, each of the diffusion patterns 241 may be formed of a circular dot of each planar shape, or may be formed of an ellipse or a polygon.

The plurality of diffusion patterns 241 may increase in density from one light source to another adjacent light source. For example, the density may increase from the first light source 220 to the second light source 221. Accordingly, it is possible to prevent the luminance of light emitted upward from an area far from the first light source 220, that is, from the rear region of the second light source 221, to be prevented from decreasing, thereby reducing the luminance of the light provided from the backlight unit 200. The brightness can be kept uniform.

For example, in the plurality of diffusion patterns 241 made of dots, an interval between two adjacent diffusion patterns may increase from the light emitting surface of the first light source 220 to the second light source 221. Light emitted from the first light source 220 may be diffused or refracted toward the second light source 221 to maintain uniform brightness.

In particular, the plurality of diffusion patterns 241 may be hardly present in an area adjacent to each of the light sources 220, 221, and 222. Accordingly, the light emitted from the light sources 220, 221, and 222 is totally reflected by the lower reflective layer 240 in the region where the diffusion patterns 241 do not exist, and the diffusion patterns 241 are moved. In the existing region, the luminance of the entire region including the region adjacent to the light sources 220, 221, and 222 may be uniformly diffused or refracted.

In addition, a plurality of diffusion patterns 241 may be arranged in a line on a diagonal line between the first light source 220 and the third light source 222. Thus, since the directions of the light emitted from the first light source 220 and the light emitted from the third light source 222 are opposite to each other, the light of the first light source 220 and the light of the third light source 222 are mutually different. Luminance may be increased in areas that may overlap. Therefore, the plurality of diffusion patterns 241 are positioned on the diagonal of the first light source 220 and the third light source 222, thereby preventing the luminance from being increased in the overlapping area of the light.

Accordingly, as illustrated in FIG. 32, the planar shape formed by the plurality of diffusion patterns 241 disposed in the direction in which the light of the first light source 220 is emitted is the direction in which the light of the third light source 222 is emitted. The diffusion patterns 241 may be formed to be symmetrical with respect to a planar shape formed by the plurality of diffusion patterns 241.

For example, the planar shape formed by the plurality of diffusion patterns 241 disposed in the direction in which the light of the first light source 220 and the third light source 222 are respectively emitted may be formed in a fan shape.

Such a fan shape is arranged to correspond to the direction of the light emitted from the light source is about 120 degrees, thereby efficiently transmitting and diffusing the light emitted from the light source, thereby maintaining the overall brightness of the backlight unit uniformly.

Referring to FIG. 33, the reflective layer 240 provided in the backlight unit 200 may have two or more reflectances. For example, the reflectance of the reflective layer 240 may be configured to have different reflectances according to the formed positions. have. That is, the reflective layer 240 may include two or more regions each having a different reflectance.

Referring to FIG. 33, the reflective layer 240 may include a first reflective layer 242 and a second reflective layer 243 having different reflectances, and the first and second reflecting layers 242 and 243 having different reflectances. ) May be arranged alternately.

For example, the first and second reflective layers 242 and 243 may be made of reflective sheets made of different materials, or one of the first and second reflective layers 242 and 243 may be made of the same reflective sheet. By adding or processing the surface, the reflectances of the first and second reflective layers 242 and 243 can be implemented differently.

According to an embodiment of the present invention, the first and second reflective layers 242 and 243 may be composed of one reflective sheet that is not physically separated. In this case, by forming a pattern for adjusting the reflectance on at least a portion of the reflecting sheet, the first and second reflecting layers 242 and 243 having different reflectances as described above may be formed.

That is, the reflectance may be adjusted by forming a pattern in at least one of the region corresponding to the first reflective layer 242 and the region corresponding to the second reflective layer 243 of the reflective layer 240, for example, one reflection. A reflectance of the corresponding region may be adjusted by forming a pattern in an area corresponding to the second reflective layer 243 shown in FIG. 33 of the reflective layer 240 formed of a sheet.

More specifically, protruding patterns for diffusing light may be formed on an upper surface of a region of the reflective layer 240 corresponding to the second reflective layer 243, and thus a region corresponding to the second reflective layer 243. Can reduce the reflectance. In this case, the light diffusion effect in the region of the reflective layer 240 corresponding to the second reflective layer 243 may be improved, so that the light emitted from the light source 220 is disposed in the adjacent light source 222. It can be spread evenly.

In addition, the surface roughness of the first and second reflective layers 242 and 243 may be different from each other. For example, the surface roughness of the second reflective layer 243 may be higher than the surface roughness of the first reflective layer 242. The reflectance of the reflective layer 243 may be lower than the reflectance of the first reflective layer 242.

Meanwhile, the first reflective layer 242 adjacent to the light sources 220, 221, and 222 based on the direction in which the light is emitted among the first and second reflective layers 242 and 243 may be formed of a specular reflection sheet. The second reflective layer 243 may be formed of a diffuse reflection sheet.

In the specular reflection sheet, light incident on a smooth surface may be reflected to have the same angle of incidence and the angle of reflection. Accordingly, the first reflective layer 242 may have the light incident obliquely from the light sources 220, 221, and 222 at the same angle of incidence. It may be reflected to proceed in a direction toward an adjacent light source.

On the other hand, the diffuse reflection sheet may be observed as if the incident light is reflected at various angles and diffused due to the diffuse reflection generated on the rough surface on which the unevenness is formed, so that the second reflective layer 243 is a light source 220, 221, 222 After the light is emitted from the light beam, the light propagates and diffuses upward.

In one embodiment of the present invention, the second reflecting layer 243 composed of the diffusing reflecting sheet is formed by processing the surface of the reflecting sheet to form irregularities, or by using a diffuse reflecting material such as titanium dioxide (TiO ₂ ). It may be formed by applying or adding at a density.

In this case, the reflectance of the first reflecting layer 242 may be higher than the reflectance of the second reflecting layer 243. Accordingly, as described above, the light incident from the light sources 220, 221, and 222 is incident on the first reflecting layer 242. The light is specularly reflected at the same reflection angle, and diffuse reflection occurs in the second reflection layer 243 to emit light upward.

Light emitted from the light sources 220, 221, and 222 by configuring the first reflective layer 242 adjacent to the light sources 220, 221, and 222 as a high reflectance sheet based on the direction in which light is emitted as described above. It is possible to effectively proceed to the adjacent light source, whereby the brightness of the light is concentrated in the region adjacent to the light source 220, 221, 222, the brightness of the light in the area far from the light source 220, 221, 222 is weakened Can be reduced.

In addition, by forming the second reflecting layer 243 away from the light sources 220, 221, and 222 on the basis of the direction in which the light is emitted, the diffuse reflecting sheet having a relatively low reflectance is used to display the traveling light. The light emitted from the light sources 220, 221 and 222, thus compensating for the reduced brightness as the light emitted from the light sources 220, 221 and 222 proceeds to the adjacent light sources, thereby weakening the brightness of the light in an area far from the light sources 220, 221 and 222. This can reduce the phenomenon.

Meanwhile, the specular reflection sheet constituting the first reflection layer 242 specularly reflects the light emitted from the light sources 220, 221, and 222 to proceed toward the adjacent light source, and at the same time reflects some of the incident light upward. The light may be scattered to be emitted toward the display panel 100.

The diffuse reflection sheet constituting the second reflection layer 243 may be manufactured by processing a surface of a sheet made of the same material as the specular reflection sheet or by forming a plurality of protruding patterns on the surface.

According to an exemplary embodiment of the present invention, light luminance of an area adjacent to the light sources 220, 221, and 222 and a region far from the light sources 220, 221, and 222 may be similarly adjusted, and thus, the backlight unit 200 may be adjusted. The uniform light luminance in the entire area may be provided to the display panel 100.

In order to allow the light emitted from the light sources 220, 221, and 222 to proceed to the region where the adjacent light sources are disposed, the first reflective layer 242 adjacent to the light sources 220, 221, and 222 may be disposed based on the direction in which the light is emitted. The width w1 may be set to a value larger than the width w2 of the second reflective layer 243. However, the width w1 of the first reflective layer 242 may be equal to or smaller than the width w2 of the second reflective layer 243, in which case the first reflective layer 242 and the second reflective layer 243 may be The reflectance can be adjusted to achieve the effects as described above.

On the other hand, as the width w1 of the first reflective layer 242 decreases, propagation of the light emitted from the light sources 220, 221, and 222 may be degraded, and thus far from the light sources 220, 221, and 222. The brightness of the light in the area may be weakened.

In addition, when the width w1 of the first reflective layer 242 increases significantly compared to the width w2 of the second reflective layer 243, light may be concentrated in an area far from the light sources 220, 221, and 222. For example, the luminance of light in an intermediate region between two adjacent light sources 220 and 222 may be weakened compared to an area far from the light sources 220, 221 and 222.

Therefore, the light emitted from the light sources 220, 221, and 222 proceeds to the area where the adjacent light source is disposed and is emitted upward, thereby providing light of uniform brightness to the display panel 100 in the entire area of the backlight unit 200. In order to be able to do this, the width w1 of the first reflective layer 242 may be formed in a range of 1.1 times to 1.6 times the width w2 of the second reflective layer 243.

Referring to FIG. 33, the first light source 220 and the second light source 221 disposed adjacent to each other in the y-axis direction do not overlap with the first reflective layer 242, that is, the first reflective layer 242 is formed. It can be placed outside of the area.

In addition, the third light source 222 and the second light source 221 which are adjacent to the first light source 220 in the x-axis direction may be disposed in an area where the second reflective layer 243 is formed.

For example, holes (not shown) into which the second light source 221 and the third light source 222 may be inserted may be formed in the second reflective layer 243, and thus the lower side of the second reflective layer 243. The second and third light sources 221 and 222 mounted on the substrate 210 may protrude upward through the holes of the second reflective layer 243 to emit light in the lateral direction.

Meanwhile, since the positions of the light sources 220, 221, and 222 illustrated in FIG. 33 are only an embodiment of the present disclosure, the light sources 220, 221, and 222 may be disposed between the light sources 220, 221, and 222 and the first and second reflective layers 242 and 243. The positional relationship of may vary.

34 is a sectional view showing a configuration of a backlight unit according to an embodiment of the present invention.

Referring to FIG. 34, a first layer 210 as described with reference to FIGS. 17 to 33, a plurality of light sources 220 formed on the first layer, and a second layer surrounding the plurality of light sources 220. The 230 and the reflective layer 240 may be configured as one optical assembly A, and the backlight unit 200 may be configured by arranging a plurality of optical assemblies A adjacent to each other.

On the other hand, the plurality of optical assemblies (A) provided in the backlight unit 200 may be arranged in a matrix form N and M (N, M is one or more natural numbers) in the x-axis, y-axis direction, respectively.

As illustrated in FIG. 34, the backlight unit 200 may include 21 optical assemblies A in a 7 × 3 arrangement. However, since the configuration shown in FIG. 34 is only an example for describing the backlight unit according to the present invention, the present invention is not limited thereto and may be changed according to the screen size of the display device.

For example, in the case of a 47-inch display device, the backlight unit 200 may be configured by arranging 240 optical assemblies A as described above in a 24 × 10 array.

Each of the optical assemblies A may be manufactured as an independent assembly, and may be disposed in close proximity to form a modular backlight unit. Such a modular backlight unit may provide light to the display panel 100 as a backlight means.

As described above, the backlight unit 200 may be driven in a full driving manner or a partial driving scheme such as local dimming or impulsive. The driving method of the backlight unit 200 may be variously changed according to a circuit design, but is not limited thereto. As a result, the color contrast ratio is increased and the image of the bright and dark portions on the screen can be clearly expressed, thereby improving image quality.

That is, the backlight unit 200 is divided into a plurality of divided driving regions, and the luminance of the divided driving region is linked with the luminance of the image signal so that the black portion of the image decreases the brightness and the bright portion increases the brightness. , Improve the contrast and sharpness.

For example, only some of the plurality of optical assemblies A shown in FIG. 34 can be driven independently to emit light upwards, for which the light sources 220 included in each optical assembly A are therefor. Each of these can be controlled independently.

Meanwhile, an area of the display panel 110 corresponding to one optical assembly A may be divided into two or more blocks, and the display panel 100 and the backlight unit 200 may be divided and driven in units of the blocks. .

According to an exemplary embodiment of the present invention, the backlight unit 200 may be divided into a plurality of blocks to be driven for each of the divided blocks, and the luminance of each of the divided blocks may be linked with the luminance of the image signal. The black portion decreases the brightness and the bright portion increases the brightness, thereby improving the contrast ratio and sharpness.

For example, when the backlight unit 200 is driven by a local dimming method, the display panel 100 may have a plurality of divided regions corresponding to each of the blocks of the backlight unit 200, and the display panel 100 The brightness of the light emitted from each of the blocks of the backlight unit 200 may be adjusted according to the luminance level of each of the divided regions of, eg, the gray level peak value or the color coordinate signal.

That is, the plurality of light sources included in the backlight unit 200 may be divided into a plurality of blocks, and may be driven for each of the divided blocks.

The block is a basic unit to which driving power for emitting light is emitted from a plurality of light sources included in the backlight unit 200, more specifically, the backlight unit 200, that is, the light sources included in one block are turned on at the same time. It is turned on or turned off and may emit light of the same brightness when turned on. In addition, light sources included in different blocks of the backlight unit 200 may be supplied with different driving powers to emit light having different luminance.

By assembling the plurality of optical assemblies (A) as described above to configure the backlight unit 200, it is possible to simplify the manufacturing process of the backlight unit 200, to minimize the loss (loss) that may occur in the manufacturing process Productivity can be improved. In addition, the backlight unit 200 has an effect that can be applied to a backlight unit of various sizes by standardizing the optical assembly (A) to mass production.

Meanwhile, when a failure occurs in any one of the plurality of optical assemblies A provided in the backlight unit 200, the replacement operation may be performed because only the optical assembly in which the failure occurs may be replaced without replacing the entire backlight unit 200. It is easy to reduce the cost of replacing parts.

On the other hand, since the optical assembly (A) and the distribution of the light sources 220 as shown in Figure 34 is only one embodiment of the present invention, the present invention is not limited thereto. For example, the optical assembly A and the light sources 220 provided in the backlight unit 200 may have a configuration as shown in FIG. 35.

FIG. 36 is a cross-sectional view illustrating a configuration of a display apparatus according to an exemplary embodiment of the present disclosure, and a description of the same configuration as that described with reference to FIGS. 1 to 21 will be omitted.

Referring to FIG. 36, a display panel 100 including a color filter substrate 110, a TFT substrate 120, an upper polarizer 130, and a lower polarizer 140, a first layer 210, and a plurality of light sources The backlight unit 200 including the 220 and the second layer 230 may be formed in close contact with each other.

For example, an adhesive layer 150 may be formed between the backlight unit 200 and the display panel 100 so that the backlight unit 200 may be adhered to and fixed to the lower side of the display panel 100.

More specifically, the upper surface of the backlight unit 200 may be bonded to the lower surface of the lower polarizer 140 using the adhesive layer 150. The backlight unit 200 may further include a diffusion sheet (not shown), and the diffusion sheet (not shown) may be disposed in close contact with an upper surface of the second layer 230. In this case, an adhesive layer 150 may be formed between the diffusion sheet (not shown) of the backlight unit 200 and the lower polarizer 140 of the display panel 100.

In addition, the back cover 35 may be disposed under the backlight unit 200, and the back cover 35 may be formed in close contact with the bottom surface of the first layer 210.

The display apparatus may include a power supply unit 55c for supplying a driving voltage to the display module 20, more specifically, the display panel 100 and the backlight unit 200. The plurality of light sources 220 provided in the 200 may be driven by using a voltage supplied from the power supply unit 55c to emit light.

In order to stably support and fix the power supply unit 55c, the power supply unit 55c may be disposed and fixed on the back cover 35 surrounding the rear surface of the display module 20.

According to an embodiment of the present invention, a first connector 310 may be formed on the rear surface of the first layer 210, and a hole for inserting the first connector 310 into the back cover 35 is formed therefor. A hole 350 may be formed.

The first connector 310 electrically connects the light source 220 and the power supply unit 55c so that a driving voltage can be supplied from the power supply unit 55c to the light source 220.

For example, the first connector 310 is formed on the lower surface of the first layer 210, is connected to the power supply 55c using the first cable 420, and supplies power through the first cable 420. The driving voltage supplied from the supply part 55c may be transmitted to the light source 220.

An electrode pattern (eg, carbon nanotube electrode pattern) may be formed on the top surface of the first layer 210. The electrode formed on the upper surface of the first layer 210 may be in contact with the electrode formed in the light source 220 to electrically connect the first connector 310 and the light source 220.

In addition, the display apparatus may include a driving controller 55a for controlling driving of the display panel 100 and the backlight unit 200. For example, the driving controller 55a may be a timing controller. Can be.

The timing controller controls driving timing of the display panel 100, and more specifically, a data driver (not shown), a gamma voltage generator (not shown), and a gate driver (not shown) included in the display panel 100. A signal for controlling the driving timing of the signal may be generated and supplied to the display panel 100.

Meanwhile, the timing controller backlights a signal for controlling the driving timing of the light sources 220 such that the backlight unit 200, and more particularly, the light sources 220 operate in synchronization with driving of the display panel 100. It may be supplied to the unit 200.

As shown in FIG. 36, in order to stably support and fix the driving controller 55a, the driving controller 55a may be disposed and fixed on the back cover 35 disposed at the rear of the display module 20. have.

According to an embodiment of the present disclosure, a second connector 320 may be formed on the substrate 210, and a hole 350 for inserting the second connector 320 may be formed in the back plate 50. It may be.

The second connector 320 may electrically connect the first layer 210 and the driving controller 55a to supply the control signal output from the driving controller 55a to the first layer 210.

For example, the second connector 320 is formed on the lower surface of the first layer 210, is connected to the driving control unit 55a using the second cable 430, and is driven through the second cable 430. The control signal supplied from the controller 55a may be transmitted to the light source driver.

Meanwhile, a light source driver (not shown) may be formed in the first layer 210, and the light source driver (not shown) may be controlled using a control signal supplied from the drive controller 55a through the second connector 320. The light sources 220 may be driven.

In addition, the power supply unit 55c and the driving controller 55a described above may be surrounded by the driving unit cover 40 to be protected from the outside.

The configuration of the display device illustrated in FIG. 36 is only an embodiment of the present disclosure, and accordingly, the power supply unit 55c, the driving control unit 55a, the first and second connectors 310 and 320, and the first and second units are illustrated. The position or number of the two cables 420 and 430 can be changed as necessary.

The present invention has been described above with reference to preferred embodiments thereof, which are merely examples and are not intended to limit the present invention. Those skilled in the art to which the present invention pertains do not depart from the essential characteristics of the present invention. It will be appreciated that various modifications and applications are not possible that are not illustrated above. For example, each component shown in detail in the embodiment of the present invention may be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

Claims (20)

Display module;
A front panel disposed in front of the display module;
A first support member comprising a plurality of surfaces formed in a direction crossing each other, wherein a first surface of the plurality of surfaces is fixed to the front panel and a second surface is fixed to the display module; And
And a bezel formed on an outer region of the display device to surround the edge of the front panel. The method of claim 1,
And an adhesive member formed between the first surface of the first support member and the front panel. The method of claim 1,
Further comprising a light shielding pattern formed on the back of the front panel,
And the adhesive member is formed at a position where at least a portion of the adhesive member overlaps the light blocking pattern. The method of claim 1,
And a fixing member for fixing the display module to the second surface of the first supporting member. The method of claim 4, wherein
Further comprising a back cover surrounding the display module from the rear,
And the fixing member fixes the back cover to the second surface of the first supporting member. The method of claim 5, wherein the fixing member
And a screw fixed to the back cover through the second surface of the first support member. The method of claim 1,
A back cover surrounding the display module at a rear side thereof; And
And a fixing member for fixing the back cover to the second surface of the first supporting member. The method of claim 7, wherein the fixing member
And a screw fixed to the second surface of the first support member through the back cover. The method of claim 1,
The first support member is composed of an aluminum (Al) extrusion bar (bar). The method of claim 1,
And a second support member connected to the first support member. The method of claim 10,
And the second support member surrounds the first support member from behind. The method of claim 10,
The second support member includes a first surface and a second surface formed in a direction crossing each other,
And a first surface of the second support member is coupled to a first surface of the first support member, and a second surface of the second support member is coupled to a second surface of the first support member. The method of claim 1,
And the bezel includes a portion of which width decreases toward the rear side. The method of claim 1,
The bezel is made of a transparent material. The method of claim 1,
The thickness of the thickest portion of the bezel is 2.7 to 6.5 times the thickness of the front panel display device. The method of claim 1,
And a seating groove supporting the edge of the front panel on the bezel. The method of claim 1, wherein the bezel
A first region having substantially the same width; And a second area whose width decreases toward the rear side.
And a second region of the bezel has a shape inclined rearward 45 to 60 degrees. The method of claim 1,
A display device in which an embossed or intaglio pattern is formed on a rear surface of the bezel. The method of claim 1,
And a backside of the front panel is etched or film laminated. The method of claim 1, wherein the display module
Display panel; And a backlight unit,
The backlight unit
First layer;
A plurality of light sources formed on the first layer; And
And a second layer disposed above the first layer and formed to surround the plurality of light sources.

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