KR100989401B1 - Backlight unit having dual display function - Google Patents

Abstract

The backlight unit having a dual display function according to an embodiment of the present invention may be configured to induce light of the first light source to at least one first light source for providing light and to a remaining region except for a partial region of the liquid crystal panel. A first light guide member having a first through hole corresponding to a partial region, an instrument panel displayed in a partial region through the first through hole at a position corresponding to the first through hole behind the first light guide member; At least one second light source provided between the first light guiding member and the instrument panel and at least one pattern which diffuses the light of the second light source to guide the instrument panel and the liquid crystal panel. And a two light guiding member.

Dual, Display, Backlight, Pass-Through Hole, Pattern, Instrument Panel, Liquid Crystal Panel

Description

BACKLIGHT UNIT HAVING DUAL DISPLAY FUNCTION}

The present invention relates to a backlight unit having a dual display function. More particularly, the entire area of the liquid crystal panel is divided into a partial area for displaying an image and a mechanical instrument panel, and a remaining area for displaying only an image. Backlight with dual display function to display the different contents in the area, to separate the display contents accurately, and to display the same contents, to reduce the separation and superposition of the images for better identification and reduce eye fatigue. It's about the unit.

In general, a display device is a device capable of displaying figures, characters, and images of contents to be displayed, and a CRT, a liquid crystal display (LCD), and a PDP are generally used.

Here, the liquid crystal display may display figures, characters, and images embodied in the liquid crystal by irradiating light to the liquid crystal, but may not emit light by itself, and irradiate the liquid crystal panel of the liquid crystal display device with a separate light source to emit an image. It is a device to display. Therefore, the liquid crystal display is provided with a backlight unit to irradiate light to the liquid crystal panel.

Here, the backlight unit is divided into an edge method and a direct method according to the installation position of the lamp, the edge method is a method in which the lamp is arranged on one side or both sides of the light guide plate for guiding the light, the direct method is a number of directly below the light guide plate. Lamps are arranged to irradiate light toward the liquid crystal panel.

The backlight unit is provided with a liquid crystal panel in front of the bottom chassis, and a plurality of lamps and a plurality of sockets for connecting the power inverter and the lamp while the light guide plate is fixed to the bottom chassis are provided therebetween.

For this reason, when the image is implemented by using the light provided from the lamp, the image is expressed only as the image implemented in the liquid crystal panel. Therefore, the game contents of the slot machine, which must be expressed in a special mechanical manner, cannot be displayed at the same time. There is.

Therefore, as shown in Japanese Patent Laid-Open No. 166964 in 2004, it is partitioned into different areas so that a mechanical image can be implemented as needed. The image can be realized in the entire area of the liquid crystal panel while being rearward from a certain area of the liquid crystal panel. A liquid crystal display device is provided so that the instrument panel can be displayed so that it can be recognized according to the game situation.

That is, as shown in FIG. 1, the liquid crystal panel 1 is provided at the front, and the optical film 2 and the light guide member 3 are sequentially provided at the rear of the liquid crystal panel 1, and the light guide member 3 is provided. One side of the edge of the lamp 4 is provided with the light of the lamp 4 is guided toward the liquid crystal panel 3 by the light guide member 3, by the induced light to implement an image on the liquid crystal panel 1, A hole 3a is formed in a part of the light guide portion 3 so that the contents of the instrument panel 5 mechanically displayed from the rear thereof can be simultaneously displayed through the hole 3a as necessary.

However, since the instrument panel and the hole 3a of the light guiding member are formed, when the same image is implemented in the entire liquid crystal panel 1, the contrast between the hole forming portion and the portion not forming the hole is not clear and the image is separated. There is.

In addition, when the image is implemented in a part of the liquid crystal panel, that is, the edge region of the liquid crystal panel without holes, and the image is not implemented in the central region where the holes are formed, the instrument panel is formed by the lamp 6 provided at the rear of the instrument panel 5. 5) there is a problem that the image and the display contents of the instrument panel overlap. Therefore, the identification is inferior and the eye fatigue is increased.

The present invention was created in view of the above necessity, and divided the entire area of the liquid crystal panel into a partial area for displaying an image and a mechanical instrument panel, and a remaining area for displaying only an image. In the case of displaying, the display contents can be accurately separated, and if the same contents are displayed, the backlight unit with the dual display function can be provided to reduce the separation and superposition of the images to improve the identification and reduce the eyestrain. There is a purpose.

According to one or more exemplary embodiments, a backlight unit having a dual display function includes at least one first light source for providing light, and a remaining region except for a partial region of the liquid crystal panel. A first light guiding member provided with a first through hole corresponding to the partial region to guide light, and a rear side of the first light guiding member provided at a position corresponding to the first through hole through the first through hole At least one second light source provided between the instrument panel displayed as a partial region, the first light guiding member and the instrument panel, and providing light to the instrument panel and the liquid crystal panel by diffusing light from the second light source. It includes a second light guide member forming one pattern.

Here, the pattern is formed in a region corresponding to the first through hole, protrudes at a predetermined height toward the instrument panel on the surface facing the instrument panel, or is recessed at a constant depth toward the instrument panel on the surface facing the instrument panel.

The pattern may be provided in the shape of a dome having at least one curved surface at a predetermined interval on the surface of the second light guide member, or the pattern may have at least one incline at a predetermined interval on the surface of the second light guide member. It is provided to have a polygonal shape having. In addition, the pattern is provided to have a predetermined length along the surface of the second light guide member.

The inner surface of the first through hole may include a blocking layer that prevents light provided from the first light source from being guided to the first through hole of the first light guiding member, and the blocking layer reflects light directed toward a partial region. The blocking layer may be a diffusion layer that scatters and reflects light.

The inner surface of the first through hole may include a diffuse reflection layer for preventing the light emitted from the first light source and the second light source from being mixed with each other.

The first light source is formed along an edge of the first light guide member, and at least two or more are disposed symmetrically on both sides, and the instrument panel is provided with a reel rotatably installed, and rotation of the reel. The center side includes a third light source for irradiating light to the instrument panel.

And a reflecting plate having a second passage hole corresponding to the predetermined region so that the light guided backward from the first light guiding member may be reflected to the remaining region between the first light guiding member and the second light guiding member.

On the other hand, between the first light guide member and the liquid crystal panel includes an optical sheet for uniformly diffusing the light guided by the first light guide member to the liquid crystal panel.

The backlight unit may include a housing in which the liquid crystal panel, the first light guiding member, the first light source, the second light guiding member, and the second light source are installed, and the housing corresponds to the first through hole of the first light guiding member. It includes a receiving hall.

The first through hole includes a transmission member to directly transmit light from the second light guide member to the liquid crystal panel.

In accordance with another aspect of the present invention, a backlight unit having a dual display function includes at least one first light source for providing light and a remaining region except for a partial region of the liquid crystal panel. A first light guiding member provided with a first through hole corresponding to the partial region to guide light, and a rear side of the first light guiding member provided at a position corresponding to the first through hole through the first through hole At least one second light source provided between the instrument panel displayed as a partial region, the first light guiding member and the instrument panel, and providing light to the instrument panel and the liquid crystal panel by diffusing light from the second light source. And a shutter disposed adjacent to the second light guiding member to determine a display of the instrument panel in the partial region.

The shutter is installed between the second light guiding member and the instrument panel, and the shutter includes a reflecting surface for reflecting light induced through the second light guiding member to a partial region.

The pattern is formed in a region corresponding to the first through hole, protrudes at a predetermined height toward the instrument panel on the surface facing the instrument panel, or is recessed at a constant depth toward the instrument panel on the surface facing the instrument panel.

In addition, the pattern is provided in the shape of a dome having a cross section at least one curved surface at regular intervals on the surface of the second light guide member, or the pattern is at least one slope of the cross section at regular intervals on the surface of the second light guide member. It may be provided to have a polygonal shape having. In this case, the pattern may be provided to have a predetermined length along the surface of the second light guide member.

Meanwhile, a blocking layer is formed on an inner surface of the first through hole to prevent the light provided from the first light source from being guided to the first through hole of the first light guiding member, and the blocking layer reflects light directed toward a partial region. It is a reflective layer or a diffusion layer which scatters and reflects light.

In addition, the inner surface of the first through-hole may include a diffuse reflection layer for preventing the light emitted from the first light source and the second light source is mixed with each other.

The instrument panel is provided with a reel rotatably installed, the rotation center side of the reel includes a third light source for irradiating light to the instrument panel.

And a reflecting plate having a second passage hole corresponding to the predetermined region so that the light guided backward from the first light guiding member may be reflected to the remaining region between the first light guiding member and the second light guiding member.

The backlight unit includes a housing in which the liquid crystal panel, the first light guide member, and the first light source are installed, and the housing includes a reception hole corresponding to the first through hole of the first light guide member.

In addition, the first through hole may include a transmission member for transmitting light directly from the second light guide member to the liquid crystal panel.

As described above, the backlight unit having the dual display function includes a first light guide member, a first light source, a second light guide member, and a second light source to provide light to a partial region and the remaining region of the liquid crystal panel, respectively. When different contents are displayed in some areas and the remaining areas, the display contents can be separated and displayed accurately.In case of displaying the same contents, separation and overlapping of images can be reduced to improve identification and reduce eyestrain. There is.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In describing the present invention, the defined terms are defined in consideration of the function of the present invention, and should not be understood in a limiting sense of the technical elements of the present invention.

2 is a cross-sectional view illustrating a backlight unit having a dual display function according to an exemplary embodiment of the present invention. 3 is a cross-sectional view of a blocking layer formed on a backlight unit having a dual display function according to an exemplary embodiment of the present invention. 4 to 7 are cross-sectional views illustrating patterns of patterns formed on the second light guiding member of the backlight unit having the dual display function according to the exemplary embodiment of the present invention.

8 is a cross-sectional view illustrating a transfer lens of a backlight unit having a dual display function according to an exemplary embodiment of the present invention. 9 is a cross-sectional view illustrating a backlight unit having a dual display function according to another exemplary embodiment of the present invention.

As shown in FIG. 2 to FIG. 6, the backlight unit 100 having the dual display function according to the exemplary embodiment of the present invention includes the liquid crystal panel 10, the first light source 40, and the first light source 40. The first light guide member 30 for guiding the light, and the instrument panel 90, the second light source 60 and the second light guide member (50). The housing 80 includes a first light source 40, a first light guiding member 30, a first light source 40, and a liquid crystal panel 10.

The liquid crystal panel 10 is composed of a conventional LCD liquid crystal panel 10 and is configured to display an image by dividing the partial region 11 and the remaining region 12 from the entire region of the liquid crystal panel 10. . That is, different images may be implemented in the partial region 11 and the remaining region 12, or the partial region 11 and the remaining region 12 may be expressed by dividing the same image.

Therefore, the partial region 11 and the remaining region 12 may be provided with different liquid crystal panels 10 so that different images may be implemented. In this case, the liquid crystal panel 10 corresponding to the partial region 11 is disposed at the center, and the liquid crystal panel 10 corresponding to the remaining region 12 is disposed at the edge of the partial region 11. Therefore, the remaining area 12 may be coupled to the plurality of liquid crystal panels 10 corresponding to the size of the upper and lower sides and the left and right sides, respectively.

The first light guiding member 30 is formed in a plate shape and is made of a synthetic resin plate material such as PMMA or transparent acrylic, and is a partial region of the liquid crystal panel 10 at a position corresponding to the partial region 11 of the liquid crystal panel 10. The first passage hole 31 is provided in a shape corresponding to (11).

In this case, the shape and size of the first through hole 31 is determined by the shape and size of the partial region 11 of the liquid crystal panel 10, and the partial region 11 of the liquid crystal panel 10 may be implemented in a rectangular shape. In this case, the first through hole 31 is also formed in a square. And the size is formed the same. However, the first through hole 31 is not limited to the shape and size of the partial region 11.

The first light source 40 is installed at the edge of the first light guide member 30, that is, the edge. Here, at least one first light source 40 is installed, but at least one is installed at each of the upper and lower portions. In addition, it may be installed on the left and right respectively when viewed from the front. In this case, the first light source 40 is provided as a light source such as a Cold Cathode Fluorescent Lamp (CCFL) or a Light Emitting Diode (LED) to be installed at the edge of the first light guide member 30.

Therefore, when the first light source 40 is driven to provide light, the light provided from the light source is incident at the edge of the first light guiding member 30 and transmitted toward the first through hole 31 to the front liquid crystal panel 10. Induces light

The light directed toward the first through hole 31 is reflected by the surface of the first through hole 31 to induce light to the remaining area 12 of the liquid crystal panel 10 again. At this time, it is reflected by the surface of the first through hole 31, but a part passes through the first through hole 31.

If necessary, as shown in FIG. 3, a blocking layer is provided to prevent light from being transmitted to the inner surface of the first through hole 31. The blocking layer is formed in the form of coating (including printing) or coating on the inner surface of the first through hole 31, and may be provided as a reflective layer so that light incident from the edge can be reflected. In addition, the light incident from the edge may be provided as a diffusion layer to be scattered and reflected. In addition, the inner surface of the first through hole 31 may include a diffuse reflection layer for preventing the light emitted from the first light source 40 and the second light source 60 is mixed with each other.

The optical sheet 20 may be disposed between the first light guide member 30 and the liquid crystal panel 10 so that the light passing through the first light guide member 30 may be uniform. Here, the optical sheet 20 is composed of at least one of a diffusion sheet, a lens sheet and a prism sheet, and a composite sheet, or a sheet in which all of the diffusion sheet, the lens sheet, and the prism sheet are stacked.

At this time, the optical sheet 20 is provided with an optical hole 21 provided in the same size as the first through-hole 31 in a position corresponding to the first through-hole 31. Therefore, the optical sheet 20 is provided to diffuse the light guided by the first light guide member 30 corresponding to the remaining region of the liquid crystal panel 10.

In addition, the rear of the first light guide member 30 is provided with a reflecting plate 70 to allow the light of the first light guide member 30 guided to the rear to be reflected forward. In the center of the reflector 70, a second through hole 71 corresponding to the first through hole 31 of the first light guide member 30 is provided. Here, the first through hole 31 and the second through hole 71 are provided in the same shape and size.

The housing 80 is a rectangular frame, the cross section of which is bent in a "b" shape so that the liquid crystal panel 10, the first light guiding member 30, the first light source 40 and the reflecting plate 70 are formed. Is installed. And the housing 80 is provided with a receiving hole 81 corresponding to the first through hole 31 of the first light guide member 30, the receiving hole 81 is the shape and size of the first through hole 31. Is the same. In this case, the reflector 70 which directly forms, or prints, or forms a reflector, which is not shown, which reflects and toward the housing 80 on the surface of the housing 80 that faces the first light guide member 30, is formed. Can be removed.

The second light guide member 50 and the second light source 60 are provided behind the first light guide member 30. Here, the second light source 60 is provided at the edge of the second light source 60, that is, the edge, so that the light of the light source can be incident from the edge. In this case, the first light source 40 is provided as a Cold Cathode Fluorescent Lamp (CCFL) to be installed at the edge of the first light guide member 30. The second light guide member 50 is formed larger than the second through hole 71 so as to cover the second through hole 71 of the first light guide member 30.

At least one pattern is formed on one surface of the second light guide member 50. Here, the pattern 51 is formed on one surface of the instrument panel 90 side. In this case, the pattern 51 is not limited to one surface of the instrument panel 90, but may be formed on one surface of the liquid crystal panel 10.

In addition, the pattern 51 may be provided with a recessed groove as shown in FIGS. 4 and 5, and may be provided with a protruding protrusion as shown in FIGS. 6 and 7. In this case, the groove or the protrusion formed by the pattern 51 is formed to protrude to a minute size, and corresponds to the first through hole 31 of the first light guide member 30, that is, the partial region 11 of the liquid crystal panel 10. It is formed within an area of the range. Therefore, the second light guide member 50 is formed larger than the area of the first through hole 31.

The pattern 51 may be formed by applying pressure (press) to the plate of the second light guiding member 50 having a predetermined thickness in a range in which the display contents of the instrument panel 90 are not distorted, and may be injection molded integrally. . In addition, the light guide member 50 may be provided by coating or printing powder of the same material.

Accordingly, as shown in FIG. 4, the pattern 51 may be formed in a recessed shape, but the cross section may have a dome shape. In this case, the pattern 51 may have an elliptical dome shape similar to a dome shape and may have a shape having at least one surface having a curved surface.

In addition, as shown in FIG. 5, the pattern 51 may be formed in a recessed shape, but the cross-sectional shape may be formed in a polygonal shape. At this time, the pattern 51 is preferably provided in a triangular shape to have at least one inclination. Accordingly, the pattern 51 may be formed in a trapezoidal shape having a at least one inclined surface, a hexagonal shape, a hexagonal shape, a hexagonal shape, an octagonal shape, or the like.

In addition, as illustrated in FIG. 6, the pattern 51 may be formed in a protruding shape, but the cross section may have a dome shape. In this case, the pattern 51 may have an elliptical dome shape similar to a dome shape and may have a shape having at least one surface having a curved surface.

In addition, as illustrated in FIG. 7, the pattern 51 may be formed in a protruding shape, and the cross-sectional shape may be formed in a polygonal shape. At this time, the pattern 51 is preferably provided in a triangular shape to have at least one inclination. Accordingly, the pattern 51 may be formed in a trapezoidal shape having at least one inclined surface, a hexagonal shape, a hexagonal shape, a hexagonal shape, an octagonal shape, or the like. The pattern 51 may be provided to have a predetermined length in the cross-sectional shape described above.

Therefore, a portion of the light is guided by the pattern 51 toward the liquid crystal panel 10, and some of the remaining light is guided to the instrument panel 90 to illuminate the instrument panel 90. In addition, the light directed toward the liquid crystal panel 10 in the pattern 51 is limited by the reception hole 81 of the housing 80 to the liquid crystal panel 10, thereby irradiating the liquid crystal panel 10.

At this time, the housing 80 is separated from the liquid crystal panel 10, the optical sheet 20, the first light guide member 30, and the first light source 40 installed in the housing 80. The second light guide member 50 and the second light source 60 may be accommodated in the seating part 82 by forming a seating part 82 formed to be stepped again so that the second light source 60 may be installed. .

Accordingly, the second light guiding member 50 provides a part of light to the remaining area 12 of the liquid crystal panel 10, and most of the light is guided by the pattern 51 to be provided to the part area 11. The contrast difference between the partial region 11 and the remaining region 12 can be reduced.

Here, the instrument panel 90 is provided in a reel shape and is rotatably provided, and a phrase or a pattern and a figure to be displayed at a predetermined angle interval are formed. And the instrument panel 90 includes a reel drive means not shown for rotating the instrument panel 90 of a separate reel form. Here, the instrument panel 90 and the reel driving means not shown are known techniques, and the instrument panel 90 may be provided in a plate shape without being limited to the reel form.

In addition, the center of rotation of the instrument panel 90 includes a third light source 110 that illuminates from the rear of the instrument panel 90 toward the first passage hole 31. The third light source 110 is provided to illuminate the instrument panel 90 from the rear to increase the luminance at the front. In this case, since the third light source 110 should be formed to be narrower than the width of the instrument panel 90, the third light source 110 is provided as a high luminance LED. And the instrument panel 90 is provided with a plate material of a relatively thin 1mm or less synthetic resin material so that the brightness can be improved by the third light source (110).

Therefore, when the advertisement or guidance image is to be implemented through the entire area of the liquid crystal panel 10, the first light source 40 and the first light source 40 and the first light source are simultaneously applied to the first light source 40 and the second light source 60. The light guide member 30 improves the luminance of the remaining region 12, and the second light source 60 and the second light guide member 50 uniform the luminance of the partial region 11 and the remaining region 12. To improve. At this time, the third light source 110 is turned off.

In addition, when displaying the instrument panel 90 through the partial region 11 of the liquid crystal panel 10 and the advertisement or guide through the remaining region 12, the first light source 40 and the third light source 110 may be separately displayed. ) By simultaneously applying power to the first light source 40 and the first light guide member 30 to improve the brightness of the remaining region 12, the instrument panel 90 is increased through the partial region (11) Will be displayed. At this time, the second light source 60 is turned off.

On the other hand, as shown in Figure 8 may include a transfer lens 120 to allow the light passing through the second light guide member 50 to be forwarded. Here, the transfer lens 120 has a plate shape having a predetermined thickness and is provided in the same shape and size as the first through hole 31. In this case, the thickness of the transfer lens 120 is greater than the thickness of the first light guide member 30 and smaller than the thickness from the rear surface of the liquid crystal panel 10 to the second light guide member 50.

The rear of the transfer lens 120 is in close contact with the front of the second light guide member 50, and the liquid crystal panel 10 is in close contact with the front of the second light guide member 50. Therefore, the light guided by the second light guide member 50 may be directly transmitted to the liquid crystal panel 10 through the transfer lens 120 to reduce the leakage of light.

At this time, the transfer lens 120 may be formed with a blocking portion 121 so that light transmitted to the inside does not leak, as formed in the first through hole 31 along the surface of the edge. The blocking unit 121 may be formed of the same reflective layer or diffusion layer as the blocking layer formed in the first passage hole 31. In addition, the transfer lens 120 may be integrally provided by protruding the second light guide member 50 forward.

In another embodiment of the backlight unit 100 having a dual display function, as illustrated in FIG. 9, the shutter 130 may be provided adjacent to the second light guiding member 50.

That is, as shown in FIG. 9, the shutter 130 is provided between the second light guide member 50 and the instrument panel 90. Here, the shutter 130 blocks the image of the instrument panel 90 so as to display an image through the entire area of the liquid crystal panel 10.

Therefore, the shutter 130 includes a shutter driving means, which is not shown. The shutter 130 is opened and closed according to whether the image is implemented in the partial region 11 of the liquid crystal panel 10, and blocks the image when the image is realized. If not implemented, the instrument panel 90 is opened for display.

 Therefore, when the image is implemented in the entire area, the shutter 130 is blocked to provide light to the remaining area 12 through the first light source 40 and the first light guide member 30, and the second light source 60. Light is simultaneously provided to the partial region 11 through the second light guide member 50. When the instrument panel 90 is to be displayed through the partial region 11, the shutter 130 is opened and power is supplied to the third light source 110.

In this case, when the image is implemented in the partial region 11, the reflective surface 131 is formed on the surface of the shutter 130 facing the second light guide member 50 to provide sufficient light to the partial region 11. Can be. Therefore, when the image is implemented in the entire area, the light is provided to the remaining area 12 through the first light source 40 and the first light guiding member 30, and the second light source 60 and the second light guiding member 50 are provided. The light including the light reflected from the reflective surface 131 is provided to the partial region 11 at the same time.

When the image is not implemented in the partial region 11, light is provided to the remaining regions through the first light source 40 and the first light guiding member 30, and the second light source 60 and the second light guiding member are provided. Sufficient light is provided to the partial region 11 through the 50 and the third light source 110. In this case, a pattern or a phrase of the instrument panel 90 is displayed in the partial region 11.

The technical idea of the backlight unit having the dual display function of the present invention has been described above with the accompanying drawings, but this is only illustrative of the best embodiments of the present invention and is not intended to limit the present invention.

Accordingly, it is a matter of course that various modifications and variations of the present invention are possible without departing from the scope of the present invention. And are included in the technical scope of the present invention.

1 is a cross-sectional view showing a backlight unit having a conventional dual display function.

2 is a cross-sectional view showing a backlight unit having a dual display function according to an embodiment of the present invention.

3 is a cross-sectional view of a blocking layer formed on a backlight unit having a dual display function according to an exemplary embodiment of the present invention.

4 to 7 are cross-sectional views showing the shape of the pattern formed on the second light guide member of the backlight unit having the dual display function according to an embodiment of the present invention.

8 is a cross-sectional view illustrating a transfer lens of a backlight unit having a dual display function according to an embodiment of the present invention.

9 is a cross-sectional view illustrating a backlight unit having a dual display function according to another exemplary embodiment of the present invention.

Description of the Related Art

100: backlight unit 10: liquid crystal panel

11: partial area 12: remaining area

20: optical sheet 21: optical hole

30, 50: First and second light guiding members 31, 71: First and second passing holes

32: blocking layer 33: diffuse reflection layer

40, 60, 110: First, second, third light source 51: Pattern

70: reflector 80: housing

81: receiving hole 82: seating portion

90: instrument panel

120: transfer lens 130: shutter

Claims (31)

At least one first light source for providing light; A first light guiding member having a first through hole corresponding to the partial region so as to guide light of the first light source to the remaining region except for the partial region of the liquid crystal panel; An instrument panel disposed at a position corresponding to the first through hole at the rear of the first light guiding member and displayed in a partial region through the first through hole; At least one second light source provided between the first light guiding member and the instrument panel and providing light;  And a second light guiding member having at least one pattern which diffuses the light of the second light source to guide the instrument panel and the liquid crystal panel, respectively. The method of claim 1, The pattern is formed in the area corresponding to the first through-hole, the backlight unit having a dual display function, characterized in that protruding at a constant height toward the instrument panel on the surface facing the instrument panel. The method of claim 1, The pattern is formed in a region corresponding to the first through-hole, the backlight unit having a dual display function, characterized in that the surface facing the instrument panel is recessed to a certain depth toward the instrument panel. The method of claim 1, The pattern is a backlight unit having a dual display function, characterized in that the cross section is provided on the surface of the second light guide member at a predetermined interval in the form of a dome having at least one curved surface. The method of claim 1, The pattern is a backlight unit having a dual display function, characterized in that the cross section on the surface of the second light guide member having a polygonal shape having at least one inclination at a predetermined interval. The method of claim 1, The pattern unit is a backlight unit having a dual display function, characterized in that it is provided to have a predetermined length along the surface of the second light guide member. The method of claim 1, And a blocking layer on an inner surface of the first through hole to prevent the light provided from the first light source from being guided to the first through hole of the first light guiding member. The method of claim 7, wherein The blocking layer is a backlight unit having a dual display function, characterized in that the reflective layer for reflecting light directed to a partial region. The method of claim 7, wherein The blocking layer is a backlight unit having a dual display function, characterized in that the diffusion layer for scattering and reflecting light. The method of claim 1, And a diffuse reflection layer on an inner surface of the first through hole to prevent the light emitted from the first light source and the second light source from being mixed with each other. The method of claim 1, The first light source is a backlight unit having a dual display function, characterized in that formed along the edge (Edge) of the first light guide member, at least two are arranged symmetrically on both sides. The method of claim 1, The instrument panel is provided with a reel (Roel) is rotatably installed, The backlight unit having a dual display function on the rotation center side of the reel includes a third light source for irradiating light to the instrument panel. The method of claim 1, And a reflecting plate having a second passage hole corresponding to the partial region so that the light guided backward from the first light guiding member can be reflected to the remaining region between the first light guiding member and the second light guiding member. Back light unit having a dual display function. The method of claim 1, And a optical sheet for uniformly diffusing the light guided by the first light guiding member into the liquid crystal panel between the first light guiding member and the liquid crystal panel. The method of claim 1, The backlight unit includes a housing in which the liquid crystal panel, the first light guide member, the first light source, the second light guide member, and the second light source are installed. And a receiving hole corresponding to the first through hole of the first light guiding member in the housing. The method of claim 1, The backlight unit having a dual display function in the first through-hole includes a transmission member for transmitting light directly from the second light guide member to the liquid crystal panel. At least one first light source for providing light; A first light guiding member having a first through hole corresponding to the partial region so as to guide light of the first light source to the remaining region except for the partial region of the liquid crystal panel; An instrument panel disposed at a position corresponding to the first through hole at the rear of the first light guiding member and displayed in a partial region through the first through hole; At least one second light source provided between the first light guiding member and the instrument panel and providing light;  A second light guiding member forming at least one pattern which diffuses the light of the second light source to guide the instrument panel and the liquid crystal panel, respectively; And a shutter installed adjacent to the second light guiding member to determine the display of the instrument panel to the partial region. The method of claim 17, And the shutter is disposed between the second light guiding member and the instrument panel. The method of claim 17 or 18, The shutter unit has a dual display function, characterized in that it comprises a reflecting surface for reflecting the light guided through the second light guide member to a partial region. The method of claim 17, The pattern is formed in the area corresponding to the first through-hole, the backlight unit having a dual display function, characterized in that protruding at a constant height toward the instrument panel on the surface facing the instrument panel. The method of claim 17, The pattern is formed in a region corresponding to the first through-hole, the backlight unit having a dual display function, characterized in that the surface facing the instrument panel is recessed to a certain depth toward the instrument panel. The method of claim 17, The pattern is a backlight unit having a dual display function, characterized in that the cross section is provided on the surface of the second light guide member at regular intervals in the form of a dome having at least one curved surface. The method of claim 17, The pattern is a backlight unit having a dual display function, characterized in that the cross section on the surface of the second light guide member having a polygonal shape having at least one inclination at a predetermined interval. The method of claim 17, The pattern unit is a backlight unit having a dual display function, characterized in that it is provided to have a predetermined length along the surface of the second light guide member. The method of claim 17, A blocking layer is formed on an inner surface of the first through hole to prevent light provided from the first light source from being guided to the first through hole of the first light guiding member, and the blocking layer is a reflective layer reflecting light directed toward a partial region. A backlight unit having a dual display function, characterized in that. The method of claim 17, A blocking layer may be formed on an inner surface of the first through hole to prevent light provided from the first light source from being guided to the first through hole of the first light guide member, and the blocking layer may be a diffusion layer that scatters and reflects light. Back light unit having a dual display function. The method of claim 17, And a diffuse reflection layer on an inner surface of the first through hole to prevent the light emitted from the first light source and the second light source from being mixed with each other. The method of claim 17, The instrument panel is provided with a reel (Roel) is rotatably installed, The backlight unit having a dual display function on the rotation center side of the reel includes a third light source for irradiating light to the instrument panel. The method of claim 17, And a reflecting plate having a second passage hole corresponding to the partial region so that the light guided backward from the first light guiding member can be reflected to the remaining region between the first light guiding member and the second light guiding member. Back light unit having a dual display function. The method of claim 17, The backlight unit includes a housing in which the liquid crystal panel, the first light guiding member, and the first light source are installed. And a receiving hole corresponding to the first through hole of the first light guiding member in the housing. The method of claim 17, The backlight unit having a dual display function in the first through-hole includes a transmission member for transmitting light directly from the second light guide member to the liquid crystal panel.

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