KR20130067986A - Bidirectional display device - Google Patents

Abstract

PURPOSE: A two direction display device is provided to display a predetermined image on each of first and second panels arranged in a direction of a front or rear side of a light guide plate by emitting light in two directions using the one light guide plate. CONSTITUTION: A light guide plate(110) radiates light in each direction of a front side and a rear side. A light source housing surrounds a front and rear side edge portion and each side of the light guide plate. A light source module(140) irradiates light to a light incident unit. A first liquid crystal display panel(150) displays an image by using the light radiated from the front side of the light guide plate. A second liquid crystal display panel(160) displays an image by using light radiated from the rear side of the light guide plate.

Description

[0001] BIDIRECTIONAL DISPLAY DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a bidirectional display device.

2. Description of the Related Art In recent years, various types of flat panel display devices capable of reducing weight and volume, which are disadvantages of cathode ray tubes (CRTs), have been developed. As a flat panel display device, a liquid crystal display device, a plasma display panel (PDP), a field emission display device, a light emitting display device and the like are actively studied However, the liquid crystal display device is in the spotlight due to the advantages of mass production technology, ease of driving means, and realization of high image quality.

The liquid crystal display device displays a moving image by using a thin film transistor (Thin Film Transistor) as a switching element. This liquid crystal display device is used as a display device of a notebook computer, a tablet computer, or various portable information devices in addition to a display device of a television or a monitor.

Since such a liquid crystal display device is not a self-luminous element, a backlight unit is provided under the liquid crystal display panel to display an image using the light emitted from the backlight unit.

As a light source of the backlight unit, a light emitting diode (LED) has recently been spotlighted. Light emitting diodes (LEDs) are energy-saving, eco-friendly, and have high response speeds.

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

Referring to FIG. 1, a conventional liquid crystal display device includes a liquid crystal display panel 10, a backlight unit 20, a guide frame 30, a support case 40, and a front case 50.

The liquid crystal display panel 10 is composed of a lower substrate 12 and an upper substrate 14 which are adhered to each other with a liquid crystal layer interposed therebetween and displays a predetermined image using light emitted from the backlight unit 20. [ Polarizing films 16 and 18 are attached to the upper and lower surfaces of the liquid crystal display panel 10, respectively.

The backlight unit 20 is disposed below the liquid crystal display panel 10 and irradiates light to the entire rear surface of the liquid crystal display panel 10. [ The backlight unit 20 includes a reflective sheet 21 disposed on the support case 40 and reflecting the incident light toward the liquid crystal display panel 10, A light guide plate 25 that is placed on the reflective sheet 21 to advance the light incident on the light incident portion from the light emitting diode module 23 toward the liquid crystal display panel 10, And a plurality of optical sheet members 27 arranged to improve the luminance characteristic of light traveling from the light guide plate 25 toward the liquid crystal display panel 10. [

The light emitting diode module 23 includes an LED (Light Emitting Diode) array substrate 23a, and a plurality of LED packages 23b.

The LED array substrate 23a is installed perpendicularly to the support case 40 so as to face the light-incident portion provided on one side of the light guide plate 25. [ The LED array substrate 23a is provided with a driving power supply line for emitting light for each of the plurality of LED packages 23b.

Each of the plurality of LED packages 23b is mounted on the LED array substrate 23a at a predetermined interval to emit light having a predetermined brightness toward the light incoming portion of the light guide plate 25 by the driving power supplied from the driving power source line .

The light emitted from each of the plurality of LED packages 23b is incident on the light incoming portion of the light guide plate 25 and then reflected and refracted inside the light guide plate 25 and reflected by the reflective sheet 21, Passes through the optical sheet member 27 of the liquid crystal display panel 10 and is irradiated onto the liquid crystal display panel 10.

The guide frame 30 is formed to support the rear edge portion of the liquid crystal display panel 10 and is supported by the support case 40.

The support case 40 is coupled to the guide frame 30 to house the backlight unit 20 and to support the guide frame 30. The support case 40 includes a support plate for supporting the backlight unit 20 and support sidewalls that are bent perpendicularly from the support plate and support the guide frame 30. [ At this time, the LED array substrate 23a of the light emitting diode module 23 is attached to the inner wall of the support side wall by an adhesive member.

The front case 50 is formed so as to have a "┓" -shaped cross section and is engaged with the side surface of the guide frame 30 to wrap the front edge portion of the liquid crystal display panel 10 and the side surface of the guide frame 30.

Such a conventional liquid crystal display device displays a predetermined image by using light emitted from the backlight unit 20 to the liquid crystal display panel 10. [

However, since the conventional liquid crystal display device displays images only in one direction, images can not be displayed in both directions.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bidirectional display device capable of displaying images in both directions.

It is another object of the present invention to provide a bi-directional display device capable of displaying stereoscopic images in both directions.

Furthermore, another object of the present invention is to provide an interactive display device in which the thickness and weight are reduced, and the front stepped portion is removed to improve the aesthetics.

According to an aspect of the present invention, there is provided a bi-directional display device including: a light guide plate for emitting light incident through a light-incident portion provided on at least one side surface in a front direction and a rear direction, respectively; A light source housing surrounding the front and rear edge portions of the light guide plate and the side surfaces thereof; A light source module installed in the light source housing and irradiating light to the light-incident portion; A first liquid crystal display panel coupled to a front surface of the light source housing and displaying an image using light emitted from a front surface of the light guide plate; And a second liquid crystal display panel coupled to a rear surface of the light source housing and displaying an image using light emitted from a rear surface of the light guide plate.

Wherein the light source housing includes first to fourth divided housings which are coupled to each other so as to surround a front surface and a rear edge portion of the light guide plate and respective side surfaces thereof and each of the first to fourth divided housings includes a light guide plate, 2 side walls surrounding each side of the liquid crystal display panel; A first panel coupling portion protruding from the inner surface of the side wall by a predetermined length and coupled to a rear edge portion of the first liquid crystal display panel; And a second panel coupling part protruding from the inner surface of the side wall in a predetermined length so as to be parallel to the first panel coupling part and coupled to a rear edge part of the second liquid crystal display panel.

Wherein the light source module unit includes at least one light source module installed in at least one of the first to fourth divided housings, and the light source module is disposed in a space between the first and second panel combining parts, A light source driving substrate attached to the substrate; And a plurality of light sources mounted on the light source driving substrate at regular intervals to irradiate light to the light-entering portion.

Wherein the bidirectional display device comprises: a plurality of front optical sheets disposed between a front surface of the light guide plate and the first liquid crystal display panel; And a plurality of rear optical sheets disposed between the rear surface of the light guide plate and the second liquid crystal display panel, wherein each of the first through fourth divided housings is formed on the side wall, And a plurality of sheet fixing portions for fixing each of the sheets.

Wherein each of the plurality of front and rear optical sheets includes a plurality of protruding members protruding from a predetermined region of each side by a predetermined length and having fixing holes, each of the plurality of sheet fixing portions is formed on the side wall, And an insertion hole into which a protruding member of each of the rear optical sheets is inserted; A first sheet fixing member protruding at a predetermined height from one side inner wall of the insertion hole and inserted into a fixing hole formed in a protruding member of each of the plurality of front optical sheets; And a second sheet fixing member protruding at a predetermined height from the other side inner wall of the insertion hole so as to be spaced apart from the first sheet fixing member by a predetermined distance and inserted into a fixing hole formed in a protruding member of each of the plurality of rear optical sheets .

Wherein each of the plurality of sheet fixing portions further comprises a guide portion formed at one side edge portion of each of the first and second sheet fixing members so as to have a predetermined slope or a predetermined curvature, Wherein each of the first and second sheet fixing members elastically deforms the projecting members of the plurality of front and rear optical sheets to be inserted into the space between the first and second sheet fixing members, And is inserted into the fixing hole by an elastic restoring force of each protruding member.

The light source housing that encloses the side surfaces of the first and second liquid crystal display panels and the front and rear surfaces of the first and second liquid crystal display panels may be exposed to the outside.

Wherein the bidirectional display device comprises: a first three-dimensional transformer disposed on a front surface of the first liquid crystal display panel and converting an image displayed on the first liquid crystal display panel into a three-dimensional image; And a second stereoscopic conversion element disposed on the front surface of the second liquid crystal display panel and converting an image displayed on the second liquid crystal display panel into a stereoscopic image. At this time, each of the first and second stereoscopic converting members can implement the stereoscopic image using a lenticular lens or a liquid crystal molecule array.

Wherein the bidirectional display device comprises: a first gap glass disposed between the first liquid crystal display panel and the first three-dimensional conversion member; And a second gap glass disposed between the second liquid crystal display panel and the second stereoscopic conversion member.

The bidirectional display device according to the present invention has the following effects.

First, light is emitted in both directions by using one light guide plate, and a predetermined image is displayed on each of the first and second liquid crystal display panels arranged in the front direction and the rear direction of the light guide plate, thereby displaying images in both directions.

Second, the light source housing may be used to support the light guide plate, the light source module unit, the first and second liquid crystal display panels, and fix the optical sheets to have a light and thin thickness.

Third, a stereoscopic image can be displayed in both directions by disposing a three-dimensional conversion member on the entire surface of each of the first and second liquid crystal display panels.

1 is a cross-sectional view schematically showing a part of a conventional liquid crystal display device.
2 is an exploded perspective view schematically showing a bidirectional display device according to a first embodiment of the present invention.
3 is a cross-sectional view schematically showing a cross section of the line II 'shown in FIG.
Fig. 4 is a view for explaining the first and second divided housings shown in Figs. 2 and 3. Fig.
5 is a view for explaining the third and fourth divided housings shown in Figs. 2 and 3. Fig.
6 is a perspective view showing a coupling structure for a part of a bidirectional display device according to the first embodiment of the present invention.
7 is an exploded perspective view schematically showing a bidirectional display device according to a second embodiment of the present invention.
8 is a cross-sectional view schematically showing a cross section taken along a line II-II 'shown in FIG.
9 is an exploded perspective view schematically showing a bidirectional display device according to a third embodiment of the present invention.
10 is a cross-sectional view schematically showing a cross section taken along a line III-III 'shown in FIG.
11 is a perspective view showing a coupling structure for a part of a bidirectional display device according to a third embodiment of the present invention.
12 is an exploded perspective view schematically showing a bidirectional display device according to a fourth embodiment of the present invention.
13 is a cross-sectional view schematically showing a cross section taken along the line IV-IV 'shown in FIG.
14 is a cross-sectional view for explaining the first and second conversion members shown in Figs. 12 and 13. Fig.

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

FIG. 2 is an exploded perspective view schematically showing a bidirectional display device according to a first embodiment of the present invention, and FIG. 3 is a cross-sectional view schematically showing a cross section of a line I-I 'shown in FIG.

2 and 3, a bidirectional display apparatus 100 according to a first embodiment of the present invention includes a light guide plate 110, a plurality of front optical sheets 120, a plurality of rear optical sheets 125, The second liquid crystal display panel 160, the second display panel drive unit 165, and the case member 140. The first liquid crystal display panel 130, the light source module unit 140, the first liquid crystal display panel 150, the first display panel drive unit 155, (170).

The light guide plate 110 is formed in a flat plate shape to include a light entrance portion 112 provided on at least one side surface. At this time, the light-incident portion 112 is preferably provided on each side of the light guide plate 110. The light guide plate 110 emits the light incident from the light source module unit 140 in the front direction and the rear direction, respectively. To this end, the light guide plate 110 may include a light reflection / scattering pattern (not shown) formed on the inside or on the front and back sides. The light reflection / scattering pattern is formed in various shapes such as spherical, polygonal, comb-like, stripe, or point, and advances the incident light toward the front direction and the rear direction respectively.

Each of the plurality of front optical sheets 120 is disposed on the front surface of the light guide plate 110 and is emitted toward the front surface of the light guide plate 110 to improve the brightness characteristics of light emitted to the first liquid crystal display panel 150. To this end, the plurality of front optical sheets 120 may comprise at least one diffusion sheet and a prism sheet selected from a lower diffusion sheet, a lower prism sheet, an upper prism sheet, and an upper diffusion sheet.

Each of the plurality of front optical sheets 120 includes a plurality of first protruding members 122 protruding from a predetermined region of each side by a predetermined length and having first fixing holes 122h. Each of the plurality of first projecting members 122 is fixed to the light source housing 130.

Each of the plurality of rear optical sheets 125 is disposed on the rear surface of the light guide plate 110 to improve the luminance characteristic of light emitted to the rear surface of the light guide plate 110 and directed to the second liquid crystal display panel 160. To this end, the plurality of rear optical sheets 125 may be composed of at least one diffusion sheet and a prism sheet selected from a lower diffusion sheet, a lower prism sheet, an upper prism sheet, and an upper diffusion sheet.

Each of the plurality of rear optical sheets 125 includes a plurality of second protruding members 127 protruding from a predetermined region of each side by a predetermined length and having a second fixing hole 127h. Each of the plurality of second projecting members 127 is fixed to the light source housing 130.

The light source housing 130 surrounds the front and rear edge portions and the respective side surfaces of the light guide plate 110. The light source housing 130 includes first to fourth divided housings 132, 134, 136, and 138 that are coupled to each other so as to surround the front and rear edge portions and the respective side surfaces of the light guide plate 110.

The first and second divided housings 132 and 134 surround the front and rear edge portions and the side surfaces of the both long sides of the light guide plate 110. The third and fourth divided housings 136 and 138 surround the front and rear edge portions and the side surfaces of both side short sides of the light guide plate 110. The ends of each of the first to fourth divided housings 132, 134, 136, and 138 are connected to the ends of the adjacent divided housings by a screw or a hook coupling method to have a rectangular frame shape. 4 to 6, each of the first to fourth divided housings 132, 134, 136, and 138 includes a side wall 210, a first panel connecting portion 220, An engaging portion 230, and a plurality of sheet fixing portions 240. [ Each of the first to fourth divided housings 132, 134, 136, and 138 having such a configuration is formed of a high-strength metal according to an extrusion molding method.

The side walls 210 are vertically formed to surround the side surfaces of the light guide plate 110 and the first and second liquid crystal display panels 150 and 160, respectively. This sidewall 210 may be formed to have a " ] " -shaped cross section to have side grooves. Further, screw holes 212 are formed at both ends of the side wall 210.

The first panel coupling portion 220 protrudes from the upper inner surface of the side wall 210 to have a predetermined length. The upper surface of the first panel coupling portion 220 is coupled to a rear edge portion of the first liquid crystal display panel 150. The lower surface of the first panel coupling portion 220 covers the front edge portion of the light guide plate 110 and the edge portions of the plurality of front optical sheets 120, respectively.

The second panel coupling portion 230 protrudes from the lower inner surface of the side wall 210 to have a predetermined length so as to be parallel to the first panel coupling portion 220. The upper surface of the second panel coupling portion 230 facing the first panel coupling portion 220 covers the lower edge portion of the light guide plate 110 and the edge portion of each of the plurality of rear optical sheets 125. The lower surface of the second panel coupling portion 230 is coupled to a rear edge portion of the second liquid crystal display panel 160.

The light guide plate 110 is inserted into the space 214 between the first and second panel coupling portions 220 and 230. [ Accordingly, the front and rear edge portions and the respective side surfaces of the light guide plate 110 are surrounded by the first and second panel coupling portions 220 and 230.

Each of the plurality of sheet fixing portions 240 is formed on the side wall 210 to fix a plurality of front optical sheets 120 and a plurality of rear optical sheets 125, respectively. To this end, each of the plurality of sheet fixing portions 240 comprises an insertion hole 242, a first sheet fixing member 144, and a second sheet fixing member 146. [

The insertion hole 242 penetrates the side wall 210 so as to correspond to the first projecting member 122 of each of the plurality of front optical sheets 120 and the second projecting member 127 of each of the plurality of rear optical sheets 125 . In the insertion hole 242, the first projecting member 122 of each of the plurality of front optical sheets 120 and the second projecting member 127 of each of the plurality of rear optical sheets 125 are inserted.

The first sheet fixing member 244 protrudes from the inner wall of one side of the insertion hole 242 so as to have a predetermined height. The first sheet fixing member 244 is inserted into the first fixing hole 122h formed in the first protruding member 122 of each of the plurality of front optical sheets 120, The front optical sheet 120 is fixed to prevent the plurality of front optical sheets 120 from flowing.

The second sheet fixing member 246 is protruded to have a predetermined height from the other side inner wall of the insertion hole 242 so as to be spaced apart from the first sheet fixing member 244 by a predetermined distance. The second sheet fixing member 246 is inserted into the second fixing hole 127h formed in the second projection member 127 of each of the plurality of rear optical sheets 125, The rear optical sheet 125 is fixed to prevent the flow of the plurality of rear optical sheets 125.

The plurality of sheet fixing portions 240 may further include first and second guide portions 244a and 246b formed on the first and second sheet fixing members 244 and 246, respectively.

The first guide portion 244a is formed to have a predetermined inclination or a predetermined curvature at one side edge portion of the first sheet fixing member 244 opposed to the side surfaces of the plurality of front optical sheets 120. [ The first guide portion 244a contacts the first projecting member 122 of each of the plurality of front optical sheets 120 inserted in the insertion hole 242 to elastically change the first projecting member 122 So that the first projecting member 122 is inserted into the space between the first and second sheet holding members 244 and 246. The first projecting members 122 of each of the plurality of front optical sheets 120 are elastically deformed by the first guide portions 244a and then elastically restored so that the first sheet fixing members 244 are elastically deformed 1 protruding member 122 in the first fixing hole 122h. As a result, the first guide portion 244a elastically deforms the first projecting member 122 of each of the plurality of front optical sheets 120 inserted into the insertion hole 242, so that the first sheet fixing member 244 Thereby facilitating the engagement of the first fixing holes 122h.

The second guide portion 246a is formed to have a predetermined inclination or a predetermined curvature at one side edge portion of the second sheet fixing member 246 opposite to the side surfaces of the plurality of rear optical sheets 120. [ The second guide portion 146a contacts the second projecting member 127 of each of the plurality of rear optical sheets 125 inserted into the insertion hole 242 to elastically change the second projecting member 127 So that the second projection member 127 is inserted into the space between the first and second sheet fixing members 244 and 246. Accordingly, the second projecting members 127 of each of the plurality of rear optical sheets 125 are elastically deformed by the second guide portion 246a, and then elastically restored, whereby the second sheet fixing member 246 is elastically deformed 2 protruding member 125, as shown in FIG. As a result, the second guide portion 246a elastically deforms the second projecting member 127 of each of the plurality of rear optical sheets 125 inserted into the insertion hole 242, so that the second sheet fixing member 246 Thereby facilitating the engagement of the second fixing hole 127h.

The light source housing 130 supports the first and second liquid crystal display panels 150 and 160 using the first and second panel coupling parts 220 and 230, respectively, as shown in FIG. 6, And a plurality of sheet fixing parts 240 which cover the edge parts of the light guide plate 110 and the plurality of front and rear optical sheets 120 and 125 and are inserted into the insertion holes 242 of the side wall 210 The projecting members 122 and 127 of the front and rear optical sheets 120 and 125 are fixed to prevent the flow of each of the front and rear optical sheets 120 and 125, respectively.

4, the first divided housing 132 of the first through fourth divided housings 132, 134, 136, and 138 includes a plurality of front grooves 132a and a plurality of rear grooves 132b ).

Each of the plurality of front grooves 132a is formed to be concave from the upper surface of the side wall 210 so as to have a constant spacing. Each of the plurality of front grooves 132a is provided with a plurality of first circuit films constituting the first display panel driver 155 described later.

Each of the plurality of rear grooves 132b is formed concave from the lower surface of the side wall 210 so as to have a constant gap. Each of the plurality of rear grooves 132b is provided with a plurality of second circuit films constituting the second display panel driver 165, which will be described later.

2 and 3, the light source module unit 140 irradiates the light entering portion 112 provided on the side surface of the light guide plate 110 with light. For example, the light source module unit 140 may include first to fourth light source modules 142, 144, 146, and 146 provided in the light source housing 130 so as to face the light entering units 112 provided on each side of the light guide plate 110, 148).

Each of the first to fourth light source modules 142, 144, 146, and 148 includes a light source driving substrate 140a and a plurality of light sources 140b.

The light source driving substrate 140a is vertically installed on the inner surface of the side wall 210 of the light source housing 130 so as to be substituted for the light entering portion 112 of the light guide plate 110. [ That is, the light source driving substrate 140a is attached to the inner surface of the side wall 210 corresponding to the space 214 between the first and second panel coupling portions 220 and 230 formed in the light source housing 130. The light source driving substrate 140a may be a metal printed circuit board (MPCB) or a flexible printed circuit board (FPCB) having flexibility. The light source driving substrate 140a may be attached to the inner surface of the side wall 210 by a double- have. A driving power supply line or the like for driving each of the plurality of light sources 140b is formed on the light source driving substrate 140a and is connected to a control board (not shown) through a signal cable (not shown).

Each of the plurality of light sources 140b is driven in accordance with the light source driving voltage supplied from the light source driving substrate 140a to emit light of a predetermined brightness toward the light entrance part 112 of the light guide plate 110. [ For example, each of the plurality of light sources 140b may be a light emitting diode (LED) package mounted at a predetermined interval on the light source driving substrate 140a. The light emitted from each of the plurality of light sources 140b is incident into the light guide plate 110 through the light entering portion 112 of the light guide plate 110 and then reflected and refracted inside the light guide plate 110, In the front direction and the rear direction, respectively.

The first liquid crystal display panel 150 is mounted on the first panel coupling portion 220 of the light source housing 130 and is incident on the light guide plate 110 through a plurality of front optical sheets 120, . The first liquid crystal display panel 150 includes a lower substrate 151 and an upper substrate 152 which are adhered to each other with a liquid crystal layer (not shown) interposed therebetween, a lower polarizing film And an upper polarizer film 154 attached to the upper surface of the upper substrate 152. [

The lower substrate 151 includes a plurality of pixels (not shown) formed for each region intersected by a plurality of gate lines (not shown) and a plurality of data lines (not shown). Each pixel may include a thin film transistor (not shown) connected to a gate line and a data line, a pixel electrode connected to the thin film transistor, and a common electrode formed adjacent to the pixel electrode and supplied with a common voltage. At this time, the common electrode may be formed on the upper substrate 152 according to the driving method of the liquid crystal layer. The lower substrate 151 controls the light transmittance of the liquid crystal layer by forming an electric field corresponding to a difference voltage between a data voltage and a common voltage applied to each pixel.

A pad portion (not shown) connected to each signal line is provided on a lower edge portion of the lower substrate 151, and a first display panel driver 155 is coupled to the pad portion. In addition, a gate driving circuit (not shown) for supplying a gate (or scan) signal to the gate line is formed at one side of the lower substrate 151 or at the edges of both short sides. A gate drive circuit is formed together with the thin film transistor manufacturing process of each pixel described above so as to be connected to each gate line.

The above-described lower substrate 151 is seated on the first panel coupling portion 220 of the light source housing 130. At this time, a rear edge portion of the lower substrate 151 may be coupled to the first panel coupling portion 220 by a panel bonding member 150a such as a double-sided tape or an adhesive. The lower substrate 151 may not be coupled to the first panel coupling part 220 by the panel bonding member 150a but may be mounted on the buffer pad attached to the first panel coupling part 220 .

The first display panel driving unit 155 is connected to the pad unit provided on the lower substrate 151 of the first liquid crystal display panel 150 to drive the first liquid crystal display panel 150, And displays a predetermined image. The first display panel driver 155 may include a plurality of first circuit films 156 coupled to the pad portions of the lower substrate 151 and a plurality of first circuit films 156 mounted on the plurality of first circuit films 156, A driving integrated circuit 157, and a first printed circuit board 158 coupled to each of the plurality of first circuit films 156.

Each of the plurality of first circuit films 156 is attached to the pad portion of the lower substrate 151 and the first printed circuit board 158 by a TAB (Tape Automated Bonding) Or COF (Chip On Flexible Board or Chip On Film). Each of the plurality of first circuit films 156 is disposed in the front groove 132a of the light source housing 130 described above. The first and / or the last of the plurality of first circuit films 156 is also connected to a gate driving circuit formed on the lower substrate 151.

The first data driving integrated circuit 157 converts input data, which is mounted on each of the plurality of first circuit films 156, into input data voltages, and supplies the data voltages to the respective data lines of the first liquid crystal display panel 150.

The first printed circuit board 158 is electrically connected to the plurality of first circuit films 156 and transmits various signals for displaying an image on the first liquid crystal display panel 150. The first printed circuit board 158 is connected to an external control board 159 through a flexible signal cable.

The control board 159 includes a control circuit unit for displaying the same image or different images on the first and second liquid crystal display panels 150 and 160, various power supply circuits (not shown), and memory devices (not shown) Respectively. Particularly, the control circuit part arranges the input data inputted from the driving system in response to the timing synchronization signal supplied from the driving system (not shown) so as to be suitable for driving the first liquid crystal display panel 150, 157). In addition, the control circuit section generates a data control signal based on the timing synchronization signal to control the driving timing of the first data driving integrated circuit 157. [ The control circuit unit generates a gate control signal based on the timing synchronization signal and outputs the generated gate control signal to the first liquid crystal display panel 160 through the first and / To the gate driving circuit formed on the lower substrate 151 of the gate driver circuit 150 to control the driving timing of the gate driving circuit.

The second liquid crystal display panel 160 is mounted on the second panel coupling portion 230 of the light source housing 130 and passes through the light guide plate 110 and the plurality of rear optical sheets 125, . The second liquid crystal display panel 160 includes a lower substrate 161 and an upper substrate 162 which are adhered to each other with a liquid crystal layer (not shown) interposed therebetween, a lower polarizing film An upper polarizer film 163, and an upper polarizer film 164 attached to the upper surface of the upper substrate 162. Since the second liquid crystal display panel 160 having such a configuration has the same configuration as that of the first liquid crystal display device 150 described above except for the reference numerals, the lower substrate 161 of the second liquid crystal display panel 160, The upper substrate 162, the lower polarizing film 163, and the upper polarizing film 164 will be described in detail with reference to the accompanying drawings.

The lower substrate 161 of the second liquid crystal display panel 160 may be coupled to the second panel coupling portion 230 by a panel bonding member 160a such as a double-sided tape or an adhesive, And may be seated on a cushioning pad attached to the coupling portion 230.

The upper substrate 162 is adhered to the lower substrate 161 with the liquid crystal layer interposed therebetween. The lower polarizing film 163 is attached to the rear surface of the lower substrate 161 so as to face the plurality of rear optical sheets 125. [ The upper polarizing film 164 is attached to the upper surface of the upper substrate 162.

The second display panel driving unit 165 is connected to the pad unit provided on the lower substrate 161 of the second liquid crystal display panel 160 to drive the second liquid crystal display panel 160, And displays a predetermined image. To this end, the second display panel driver 165 includes a plurality of second circuit films 166 coupled to the pad portions of the lower substrate 161, second data (not shown) mounted on each of the plurality of second circuit films 166, A driving integrated circuit 167, and a second printed circuit board 168 coupled to each of the plurality of second circuit films 166. The second display panel driver 165 having this configuration has the same configuration as that of the first display panel driver 155 described above but has the same configuration as the first display panel driver 155, A detailed description of each of the two circuit films 166, the second data driving IC 167, and the second printed circuit board 168 will be given instead of the above description, .

The plurality of second circuit films 166 are connected to the pad portions provided on the lower substrate 161 of the second liquid crystal display panel 160 and are connected to the second printed circuit board 168.

The second data driving integrated circuit 167 is mounted on each of the plurality of second circuit films 166 and converts the input data input from the control board 159 into the data voltage to be supplied to the second liquid crystal display panel 160 And supplies it to each data line.

The second printed circuit board 168 is electrically connected to the plurality of second circuit films 166 and transmits various signals inputted from the control board 159 to each of the plurality of second circuit films 166.

On the other hand, the control circuit mounted on the control board 159 controls the input data inputted from the driving system in response to the timing synchronization signal supplied from the driving system (not shown) so as to be suitable for driving the second liquid crystal display panel 160 And supplies it to the second data drive IC 167. In addition, the control circuit section generates a data control signal based on the timing synchronization signal, and controls the driving timing of the second data driving integrated circuit 167. Then, the control circuit portion generates a gate control signal based on the timing synchronization signal, and outputs the generated gate control signal to the second liquid crystal display panel 163 through the first and / or the last circuit film of the plurality of second circuit films 166, To the gate driving circuit formed on the lower substrate 161 of the gate driver circuit 160 to control the driving timing of the gate driving circuit.

The case member 170 is coupled to the light source housing 130 to surround the front edge portions of the first and second liquid crystal display panels 150 and 160 and the side surface of the light source housing 130. To this end, the case member 170 is configured to include a front case 172 and a rear case 174. [

The front case 172 is formed in the shape of a rectangular frame so as to have a "┏" or "┓" cross-section so as to cover the front edge portion of the first liquid crystal display panel 150 and the upper side of the outer surface of the light source housing 130. The front case 172 may be coupled to the side wall 210 of the light source housing 130 by a screw or a hook.

The rear case 174 is formed in the shape of a rectangular frame so as to have a "┏" or "┓" cross-section so as to cover the front edge portion of the second liquid crystal display panel 160 and the outer side lower surface of the light source housing 130. The rear case 174 may be coupled to the lower side of the side wall 210 of the light source housing 130 by a screw or a hook coupling method.

As described above, the bidirectional display device 100 according to the first embodiment of the present invention is configured to emit light in both directions using one light guide plate 110 and to transmit light to the first and second light guide plates 110, And displays an image in both directions by displaying a predetermined image on each of the second liquid crystal display panels 150 and 160. The bidirectional display device 100 according to the first embodiment of the present invention includes the light guide plate 110, the light source module unit 140, the first and second liquid crystal display panels 150 and 160 using the light source housing 130, And has a light and thin thickness by fixing the optical sheets 120 and 125.

FIG. 7 is an exploded perspective view schematically showing a bidirectional display device according to a second embodiment of the present invention, and FIG. 8 is a cross-sectional view schematically showing a cross section taken along a line II-II 'shown in FIG.

The bidirectional display apparatus 200 according to the second embodiment of the present invention shown in Figs. 2 and 3 is similar to the bidirectional display apparatus 100 shown in Figs. 2 and 3 except that the case member 170 is removed So that the front step due to the case member 170 is removed, thereby having an improved esthetic feeling in design.

Specifically, in the bidirectional display device 200 according to the second embodiment of the present invention, each of the first and second liquid crystal display panels 150 and 160 includes a panel adhesive member 150a or 160a such as a double-sided tape or an adhesive To the first and second panel coupling parts 220 and 230 of the light source housing 130, respectively.

Each of the upper polarizing films 154 and 164 of each of the first and second liquid crystal display panels 150 and 160 includes a lower substrate 151 and a lower substrate 161, 152, and 162, respectively.

The upper and lower surfaces of the side wall 210 of the light source housing 130 are positioned on the same line as the upper surfaces of the upper polarizing films 154 and 164 of the first and second liquid crystal display panels 150 and 160, respectively. The side grooves provided in the side wall 210 of the light source housing 130 are sealed by the side cap 250.

In the bidirectional display device 200 according to the second embodiment of the present invention, the entire upper surface of each of the first and second liquid crystal display panels 150 and 160, and the upper and lower surfaces of the light source housing 130, Lt; / RTI > However, one long side edge portion of the first and second liquid crystal display panels 150 and 160 including the pad portion and the first and second display panel driving portions 155 and 165 may be covered by the supporting structure. At this time, the supporting structure may be a main body structure or a cradle including a driving system for driving the bidirectional display device 200. Accordingly, the bidirectional display device 200 according to the second embodiment of the present invention has a frontal and a rear surface of a remaining portion except for one side long edge portion covered by the supporting structure, .

Meanwhile, the bidirectional display device 200 according to the second embodiment of the present invention includes a front glass reinforced glass (or a front protective film) covering the upper surface of the light source housing 120 exposed to the outside and the front surface of the first liquid crystal display panel 150 And a rear surface reinforced glass (or rear surface protection film) covering the lower surface of the light source housing 120 exposed to the outside and the front surface of the second liquid crystal display panel 160. In this case, the bidirectional display device 200 according to the second embodiment of the present invention has a frontal and a rear surface that are both flat without a step, so that they are improved in design.

FIG. 9 is an exploded perspective view schematically showing a bidirectional display device according to a third embodiment of the present invention, FIG. 10 is a cross-sectional view schematically showing a section of the line III-III 'shown in FIG. 9, And FIG. 7 is a perspective view showing a coupling structure for a part of the bidirectional display device according to the third embodiment.

The bidirectional display device 300 according to the third embodiment of the present invention shown in Figs. 9 to 11 displays stereoscopic images and includes a light guide plate 110, a plurality of front optical sheets 120, The first display panel driving part 155, the second liquid crystal display panel 160, the second display panel driving part 155, the light source housing 130, the light source module part 140, the first liquid crystal display panel 150, A second gap glass 385, a first three-dimensional conversion member 390, a second three-dimensional conversion member 395, and a case member 370. The second gap glass 385 includes a first gap glass 165, a first gap glass 380, . The bidirectional display apparatus 300 according to the third embodiment having such a configuration includes a first gap glass 380, a second gap glass 385, a first three-dimensional conversion member 390, a second three- 395, and the case member 370 are the same as those of the bi-directional display device 100 shown in Figs. 2 and 3 described above. Therefore, the same reference numerals are assigned to the same components, and repetitive description of the same components will be omitted.

First, each of the first and second liquid crystal display panels 150 and 160 is driven by each of the first and second display panel drivers 155 and 165 to generate a stereoscopic image having a plurality of viewpoints, that is, The image and the right eye image are spatially separated and displayed.

The first gap glass 380 is disposed on the front surface of the light source housing 130 so as to be disposed on the front surface of the first liquid crystal display panel 150. At this time, the first gap glass 380 is attached to the upper surface of the side surface of the first liquid crystal display panel 150 or the light source housing 130 by a first glass bonding member 380a such as double-sided tape or adhesive. When the first gap glass 380 is attached to the first liquid crystal display panel 150, the first glass bonding member 380a is disposed on the first panel coupling portion 220 of the light source housing 130, As shown in Fig. The first gap glass 380 separates a distance between the first liquid crystal display panel 150 and the first stereoscopic conversion member 390 by a predetermined distance so that the left eye image displayed on the first liquid crystal display panel 150, Prevent mixing of images.

The second gap glass 385 is disposed on the rear surface of the light source housing 130 so as to be disposed on the front surface of the second liquid crystal display panel 160. At this time, the second gap glass 385 is attached to the side surface of the second liquid crystal display panel 160 or the side surface of the light source housing 130 by a second glass bonding member 385a such as double-sided tape or adhesive. When the second gap glass 385 is attached to the second liquid crystal display panel 160, the second glass bonding member 385a is attached to the second panel coupling portion 230 of the light source housing 130, As shown in Fig. The second gap glass 385 separates the distance between the second liquid crystal display panel 160 and the second stereoscopic conversion member 395 by a predetermined distance so that the left eye image displayed on the second liquid crystal display panel 160, Prevent mixing of images.

The first stereoscopic conversion member 390 is attached to the upper surface of the first gap glass 380 and converts each of the left eye image and the right eye image, which pass through the first gap glass 380, into a plurality of views, To the viewer. The first three-dimensional conversion member 390 may be formed of a lens sheet including a plurality of lenticular lenses 392 formed to have a predetermined slope with respect to at least one pixel formed on the first liquid crystal display panel 150 have. At this time, the width and the slope of each of the plurality of lenticular lenses 392 are set to correspond to the number of viewers who can view the stereoscopic image, that is, the number of viewers (Viewer).

The second stereoscopic conversion member 395 is attached to the upper surface of the second gap glass 385 and converts each of the left eye image and the right eye image passing through the second gap glass 385 to a plurality of viewpoints, To the viewer. For this, the second stereoscopic conversion member 395 may be formed of a lens sheet including a plurality of lenticular lenses (not shown) formed to have a predetermined slope with respect to each pixel formed on the second liquid crystal display panel 160 . At this time, the width and slope of each of the plurality of lenticular lenses are set to correspond to the number of viewers who can view stereoscopic images, that is, the number of viewers (Viewer).

The case member 370 is coupled to the light source housing 130 and surrounds the front edge portions of the first and second three-dimensional conversion members 390 and 395 and the side surface of the light source housing 130, respectively. To this end, the case member 370 is configured to include a front case 372 and a rear case 374.

The front case 372 is formed in the shape of a rectangular frame so as to have a "┏" or "┓" cross-section so as to cover the front edge portion of the first three-dimensional conversion member 390 and the outer side surface of the light source housing 130. The front case 372 may be coupled to the side wall 210 of the light source housing 130 by a screw or a hook.

The rear case 374 is formed in the shape of a rectangular frame so as to have a "┏" or "┓" cross-section so as to cover the front edge portion of the second stereoscopic conversion member 395 and the outer side lower surface of the light source housing 130. The rear case 374 may be coupled to the lower side of the side wall 210 of the light source housing 130 by a screw or a hook coupling method.

The above-described case member 370 can be omitted. That is, when the gap glasses 380 and 395 are fixedly coupled to the light source housing 130, the front and rear surfaces of the bidirectional display device 300 are flattened by the gap glasses 380 and 395, respectively. Since the three-dimensional conversion members 390 and 395 are attached and fixed to the entire upper surface of each of the gap glasses 380 and 390, it is not necessary to cover the front edge portions of the three-dimensional conversion members 390 and 395. Accordingly, when the case member 370 described above is removed, the bidirectional display device 300 of the third embodiment of the present invention has a frontal and a rear surface flattened without a step, thereby having a design augmented feeling.

As described above, the bidirectional display device 300 according to the third embodiment of the present invention provides the same effect as the bidirectional display device 100 of the first embodiment described above, and is provided with three-dimensional conversion members 390 and 395 The stereoscopic image can be displayed in both directions.

FIG. 12 is an exploded perspective view schematically showing a bidirectional display device according to a fourth embodiment of the present invention, FIG. 13 is a cross-sectional view schematically showing a section of line IV-IV 'shown in FIG. 13, 13 is a cross-sectional view for explaining the first and second three-dimensional conversion members shown in Fig. 13; Fig.

12 to 14, a bidirectional display device 400 according to a fourth embodiment of the present invention displays stereoscopic images and includes a light guide plate 110, a plurality of front optical sheets 120, a plurality of rear optical sheets A first LCD panel 150, a first LCD panel 155, a second LCD panel 160, a second display panel driver 165, A second gap glass 385, a first three-dimensional conversion member 490, a first lens panel driving unit 492, a second three-dimensional conversion member 495, a second gap- 2 lens panel driving unit 497, and a case member 370. [ The bidirectional display device 400 according to the fourth embodiment having such a configuration is configured such that the first three-dimensional conversion member 490, the first lens panel driver 492, the second three-dimensional conversion member 495, and the second lens panel driver 497 Are the same as those of the bidirectional display device 300 shown in Figs. 9 to 11 described above. Therefore, the same reference numerals are assigned to the same components, and repetitive description of the same components will be omitted.

The first stereoscopic conversion member 490 is attached to the upper surface of the first gap glass 380 and converts each of the left eye image and the right eye image passing through the first gap glass 380 to a plurality of viewpoints, To the viewer. For this, the first three-dimensional conversion member 490 may be a liquid crystal lens panel that realizes a stereoscopic image using a liquid crystal lens formed according to the arrangement of liquid crystal molecules.

The first three-dimensional conversion member 490 includes a rear substrate 490a and a front substrate 490b which are opposed to each other with the liquid crystal layer LC for image separation interposed therebetween.

The rear substrate 490a is attached to the upper surface of the first gap glass 380 and includes a plurality of transparent electrode lines 491a, a plurality of pad electrodes 491b, a lower insulating film 491c, and a lower orientation film 491d .

Each of the plurality of transparent electrode lines 491a is formed on the rear substrate 490a and forms an electric field in the liquid crystal layer LC for image separation according to a liquid crystal driving signal supplied through each of the plurality of pad electrodes 491b, The driving of the separation liquid crystal layer LC is turned on / off.

Each of the plurality of pad electrodes 491b is formed on a rear substrate 490a which overlaps with a lens panel pad portion LPPP provided on one side of the rear substrate 490a and electrically connected to each of the plurality of transparent electrode lines 491a Respectively. The plurality of pad electrodes 491b are connected to the first lens panel driver 492 and supply a liquid crystal driving signal supplied from the first lens panel driver 492 to each of the plurality of transparent electrode lines 491a.

The lower insulating film 491c is formed on the rear substrate 490a to cover the plurality of transparent electrode lines 491a and the pad electrodes 491b.

The lower alignment film 491d is formed on the lower insulating film 491c so that the liquid crystal molecules of the liquid crystal layer LC for image separation are aligned (or oriented) in a predetermined direction.

The front substrate 490b is adhered to the rear substrate 490a with the liquid crystal layer LC for image separation therebetween. The front substrate 490b is formed so as to cover the rear substrate 490a excluding the peripheral region of one side of the rear substrate 490a provided with the lens panel pad portion LPPP. 490a. The front substrate 490b includes a transparent electrode layer 494a and a lens pattern layer 494b.

The transparent electrode layer 494a is formed on the front substrate 490b so as to be superimposed on the plurality of transparent electrode lines 491a formed on the rear substrate 490a. The transparent electrode layer 494a is supplied with a reference voltage that is a reference for turning on / off driving of the liquid crystal layer for image separation LC.

The lens pattern layer 494b is formed on the front substrate 490b so as to cover the transparent electrode layer 494a and is formed to be concave from the opposing face opposed to the rear substrate 490a so as to overlap each of the plurality of transparent electrode lines 491a. And a plurality of lens pattern grooves (LP).

Each of the plurality of lens pattern grooves LP is formed to have a concave lens shape, for example, a semicircular or elliptical cross section so as to overlap with a plurality of transparent electrode lines 491a formed on the rear substrate 490a. At this time, the sectional width of each of the plurality of lens pattern grooves LP is for separating the left eye image and the right eye image spatially separated and displayed on the wp1 liquid crystal display panel 150, .

The rear substrate 490a and the front substrate 490b are bonded together by a sealing member 493 so as to face each other with the liquid crystal layer LC for image separation therebetween.

The liquid crystal layer LC for image separation is made of an anisotropic material including at least one of liquid crystal and RM (Reactive Mesogen), and is packed in each of a plurality of lens pattern grooves LP formed in the front substrate 490b. At this time, the liquid crystal molecules of the liquid crystal layer LC for image separation are aligned (or oriented) in a predetermined direction by the lower alignment film 491d formed on the rear substrate 490a. The liquid crystal layer for image separation LC is driven according to a liquid crystal driving signal applied to each of the plurality of transparent electrode lines 491a and a reference voltage applied to the transparent electrode layer 494a, thereby separating the left eye image and the right eye image.

The second stereoscopic conversion member 495 is attached to the upper surface of the second gap glass 385 and converts each of the left eye image and the right eye image passing through the second gap glass 385 to a plurality of viewpoints, To the viewer. For this, the second stereoscopic conversion member 495 may be a liquid crystal lens panel that realizes a stereoscopic image using a liquid crystal lens formed according to the arrangement of liquid crystal molecules.

The second three-dimensional conversion member 495 includes a rear substrate 490a and a front substrate 490b which are adhered to each other with the liquid crystal layer LC for image separation interposed therebetween. The second three-dimensional conversion member 495 having such a configuration is the same as the above-mentioned first three-dimensional conversion member 490 except that it is driven by the second lens panel driving unit 497. Therefore, Instead.

The first lens panel driving unit 492 generates a liquid crystal driving signal corresponding to the left eye image and the right eye image displayed on the first liquid crystal display panel 150 under the control of the control board 459, To the plurality of pad electrodes 491b formed in the lens panel pad portion LPPP of the liquid crystal display panel. The first lens panel driving unit 492 includes a plurality of first flexible circuit films 492a coupled to the lens panel pad unit LPPP of the first three-dimensional conversion member 490, A first liquid crystal driving integrated circuit 492b mounted on each of the first flexible circuit films 492a and 492a, and a first lens driving printed circuit board 492c coupled to the plurality of first flexible circuit films 492a.

Each of the plurality of first flexible circuit films 492a is attached to the lens panel pad portion LPPP and the first lens driving printed circuit board 492c by a TAB (Tape Automated Bonding) Package) or COF (Chip On Flexible Board or Chip On Film).

Each of the first liquid crystal driving integrated circuits 492b is mounted on each of the plurality of first flexible circuit films 492a and generates a liquid crystal driving signal in response to the lens panel control signal through the first lens driving printed circuit board 492c And supplies the generated liquid crystal driving signals to the respective transparent electrode lines 491a of the rear substrate 490a.

The first lens-driving printed circuit board 492c is electrically connected to each of the plurality of first flexible circuit films 492a and is electrically connected to the first flexible circuit film 492b for driving the liquid crystal layer LC for image separation of the first three- Signal. The first lens-driving printed circuit board 492c is connected to an external control board 459 through a flexible signal cable.

The second lens panel driving unit 497 generates a liquid crystal driving signal corresponding to the left eye image and the right eye image displayed on the second liquid crystal display panel 160 under the control of the control board 459, To the plurality of pad electrodes 491b formed in the lens panel pad portion LPPP of the liquid crystal display panel. To this end, the second lens panel driver 497 includes a plurality of second flexible circuit films 497a coupled to the lens panel pad portion LPPP of the second stereoconverter 495, a plurality of second flexible circuit films A second liquid crystal driving integrated circuit 497b mounted on each of the first and second flexible circuit films 497a and 497a and a second lens driving printed circuit board 497c coupled to the plurality of second flexible circuit films 497a. The second lens panel driver 497 having such a configuration is the same as the first lens panel driver 492 except for the difference between the first lens panel driver 492 and the first lens panel driver 492 described above.

As described above, the bidirectional display device 400 according to the fourth embodiment of the present invention provides the same effects as the bidirectional display device 100 of the first embodiment described above, and is provided with three-dimensional conversion members 490 and 495 The stereoscopic image can be displayed in both directions.

In the bi-directional display device 400 according to the fourth embodiment of the present invention described above, the case member 370 may be removed as described above. In this case, one side long edge portion including the pad portion of the three-dimensional conversion member 490 and 495 and the first and second lens panel driving portions 492 and 497 is covered by the supporting structure. Accordingly, the bidirectional display device 400 according to the fourth embodiment of the present invention has a design augmented by the flatness of the front and rear surfaces of the remaining portion excluding the one long side edge portion covered by the support structure, .

Meanwhile, in the bidirectional display device 400 according to the fourth embodiment of the present invention, the three-dimensional conversion members 490 and 495 are made of a liquid crystal lens panel, but the present invention is not limited thereto. Or a switchable barrier panel for implementing a stereoscopic image. The switchable barrier panel has no lens pattern layer 494b in the above-described liquid crystal lens panel, and a plurality of transparent electrode lines 491a are formed in the liquid crystal lens panel through a light transmitting region which transmits light in accordance with a liquid crystal driving signal applied to each of the plurality of transparent electrode lines 491a Dimensional image having a viewpoint (Multi View) or liquid crystal molecules of the liquid crystal layer LC for image separation according to a liquid crystal driving signal applied to each of the plurality of transparent electrode lines 491a is arranged in the form of a lens, The stereoscopic image is realized.

The bidirectional display apparatus according to the first to fourth embodiments of the present invention can be used as a public display or a public display for providing information to the public rather than a specific individual in a public place. In this case, the bidirectional display apparatus according to the present invention can be used as an information board in a public place such as a large-sized store, an exhibition hall, an airport, or a counter-waiting room to display various information composed of two- .

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

110: light guide plate 120: front optical sheet
125: rear optical sheet 130: light source housing
140: light source module unit 150: first liquid crystal display panel
155: first display panel driver 160: second liquid crystal display panel
165: second display panel driver 170: case member

Claims (11)

A light guide plate for emitting light incident through at least one light-incident portion provided on at least one side surface in a front direction and a rear direction, respectively;
A light source housing surrounding the front and rear edge portions of the light guide plate and the side surfaces thereof;
A light source module installed in the light source housing and irradiating light to the light-incident portion;
A first liquid crystal display panel coupled to a front surface of the light source housing and displaying an image using light emitted from a front surface of the light guide plate; And
And a second liquid crystal display panel coupled to a rear surface of the light source housing and displaying an image using light emitted from a rear surface of the light guide plate. The method according to claim 1,
Wherein the light source housing includes first to fourth divided housings coupled to each other to surround a front surface and a rear edge portion of the light guide plate,
Wherein each of the first to fourth divided housings comprises:
Side walls surrounding side surfaces of the light guide plate and the first and second liquid crystal display panels;
A first panel coupling portion protruding from the inner surface of the side wall by a predetermined length and coupled to a rear edge portion of the first liquid crystal display panel; And
And a second panel coupling portion protruding from the inner surface of the side wall to a predetermined length so as to be parallel to the first panel coupling portion and coupled to a rear edge portion of the second liquid crystal display panel. 3. The method of claim 2,
Wherein the light source module unit includes at least one light source module installed in at least one of the first through fourth divided housings,
The light source module includes:
A light source driving board attached to an inner surface of the side wall so as to be disposed in a space between the first and second panel connecting parts; And
And a plurality of light sources mounted on the light source driving substrate at regular intervals to irradiate light to the light-incident portion. 3. The method of claim 2,
A plurality of front optical sheets disposed between a front surface of the light guide plate and the first liquid crystal display panel; And
Further comprising a plurality of rear optical sheets disposed between a rear surface of the light guide plate and the second liquid crystal display panel,
Wherein each of the first through fourth divided housings further comprises a plurality of sheet fixing portions formed on the side walls to fix each of the plurality of front and rear optical sheets. 5. The method of claim 4,
Wherein each of the plurality of front and rear optical sheets includes a plurality of protruding members protruding from a predetermined area of each side by a predetermined length and having fixing holes,
Wherein each of the plurality of sheet fixing portions comprises:
An insertion hole formed in the side wall and into which a protruding member of each of the plurality of front and rear optical sheets is inserted; And
A first sheet fixing member protruding at a predetermined height from one side inner wall of the insertion hole and inserted into a fixing hole formed in a protruding member of each of the plurality of front optical sheets; And
And a second sheet fixing member protruding at a predetermined height from the other side inner wall of the insertion hole so as to be spaced apart from the first sheet fixing member by a predetermined distance and inserted into a fixing hole formed in a protruding member of each of the plurality of rear optical sheets Wherein the display device is a bi-directional display device. 6. The method of claim 5,
Wherein each of the plurality of sheet fixing portions further comprises a guide portion formed at one side edge portion of each of the first and second sheet fixing members so as to have a predetermined slope or a predetermined curvature,
The guide portion elastically deforms the projecting members of each of the plurality of front and rear optical sheets inserted into the insertion hole to be inserted into the space between the first and second sheet fixing members,
Wherein each of said first and second sheet fixing members is inserted into said fixing hole by an elastic restoring force of a projecting member of each of said plurality of front and rear optical sheets. 7. The method according to any one of claims 1 to 6,
Further comprising: a case surrounding the front edge portion of each of the first and second liquid crystal display panels and the side surface of the light source housing. 7. The method according to any one of claims 1 to 6,
Wherein the light source housing and the first and second liquid crystal display panels each have a front surface and a rear surface exposed to the outside. 7. The method according to any one of claims 1 to 6,
A first stereoscopic conversion element disposed on a front surface of the first liquid crystal display panel and converting an image displayed on the first liquid crystal display panel into a stereoscopic image; And
Further comprising a second stereoscopic conversion element disposed on a front surface of the second liquid crystal display panel and converting an image displayed on the second liquid crystal display panel into a stereoscopic image. 10. The method of claim 9,
Wherein each of the first and second stereoscopic converting members implements the stereoscopic image using a lenticular lens or a liquid crystal molecule array. 10. The method of claim 9,
A first gap glass disposed between the first liquid crystal display panel and the first three-dimensional conversion member; And
Further comprising a second gap glass disposed between the second liquid crystal display panel and the second three-dimensional conversion member.

Images