KR20070076652A - Reversible liquid crystal display and handy terminal having the same - Google Patents

Abstract

A dual LCD and a portable terminal having the same are provided to reduce an entire thickness of the LCD and the portable terminal, reduce a manufacturing cost, and improve brightness by displaying an image in both directions with a single panel. An LCD panel(100) includes a first display area and a second display area displaying an image from different surfaces thereof. A first backlight unit is provided on a first surface of the LCD panel, and emits light to the first display area. A second backlight unit is provided on a second surface of the LCD panel, and emits light to the second display area. A first light transmitting part is provided on the first display area of the second surface. A second light transmitting part is provided on the second display area of the first surface. The light transmitting parts have the same thickness as the backlight unit. The light transmitting parts include a protective layer(420) and an impact absorbing layer(410) provided between the protective layer and the LCD panel.

Description

A double-sided liquid crystal display device and a portable terminal having the same {REVERSIBLE LIQUID CRYSTAL DISPLAY AND HANDY TERMINAL HAVING THE SAME}

1 is an exploded perspective view of a double-sided liquid crystal display according to a first embodiment of the present invention.

2 is a cross-sectional view of a double-sided liquid crystal display device according to the first embodiment.

3 and 4 are perspective views of the double-sided liquid crystal display device according to the first embodiment.

5 is a plan view for explaining a liquid crystal display panel according to the present embodiment.

6 is an enlarged conceptual view of region C of FIG. 5;

7 is a diagram of a portable wireless terminal according to a second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: liquid crystal display panel 200, 300: backlight unit

400, 500: light transmitting part 600: mold frame

700: storage member

The present invention relates to a double-sided liquid crystal display device and a portable terminal having the same, and relates to a double-sided liquid crystal display device capable of displaying images in both directions using a single liquid crystal display panel.

A double-sided liquid crystal display device that can view images on both sides has recently been applied to a foldable portable wireless terminal so that information can be displayed regardless of whether the folder is closed or opened.

In the case of such a conventional double-sided liquid crystal display device, a main liquid crystal display panel displaying an image in one surface direction and a sub liquid crystal display panel displaying an image in the other surface direction were produced. That is, the two-sided image was displayed using two liquid crystal display panels. However, since two different liquid crystal display panels are used, the manufacturing cost increases and the overall thickness of the device increases. In addition, since the main panel and the sub-panel have to be driven separately, power consumption also increases.

In addition, when the double-sided liquid crystal display device is applied to a small electronic device, an image displayed by the liquid crystal display device is displayed through a window such as a transparent plastic for protecting the same. An air gap is present between the liquid crystal display and the window. The transmittance is reduced in the air gap and in the window, resulting in a decrease of about 10% w in the final transmittance. There is a problem of lowering the luminance of the liquid crystal display device.

Accordingly, the present invention is derived to solve the above problems, it is possible to reduce the overall thickness of the device by displaying the image on both sides through a single liquid crystal display panel, and to reduce the power consumption and manufacturing cost, It is an object of the present invention to provide a double-sided liquid crystal display device and a portable terminal including the same, which have protective films on both sides of the liquid crystal display panel and can be employed in a small electronic device without a window, thereby preventing a decrease in luminance.

A liquid crystal display panel having a first display region and a second display region for displaying an image on different surfaces according to the present invention, and an agent provided on the first surface of the liquid crystal display panel to irradiate light to the first display region. A first backlight unit, a second backlight unit provided on a second surface of the liquid crystal display panel to irradiate light to the second display region, and a first light transmitting unit provided on the first display region of the second surface; And a second light transmitting part provided on the second display area of the first surface.

Here, the light transmitting portion preferably has the same thickness as the backlight portion.

The light transmitting part may include a protective layer and a shock absorbing layer provided between the protective layer and the liquid crystal display panel. Of course, the first and second display areas of the liquid crystal display panel may be formed in a transmissive type, or at least one of the first and second display areas may be formed in a transflective type.

Preferably, the second display area is provided at at least a portion of one side edge of the liquid crystal display panel, and an area ratio of the first display area and the second display area is in a range of 1: 1 to 1:20.

It is preferable to include a plurality of sub pixels provided in one pixel of the first display area and at least one sub pixel provided in one pixel of the second display area. Here, an R sub pixel, a G sub pixel, and a B sub pixel are provided in one pixel of the first display area, and at least one of an R sub pixel, a G sub pixel, and a B sub pixel is provided in one pixel of the second display area. It is effective that any one subpixel is provided.

The liquid crystal display panel includes a thin film transistor substrate on which a pixel electrode and a thin film transistor are formed, and a liquid crystal layer provided between the common electrode substrate on which the common electrode is formed, the thin film transistor substrate, and the common electrode substrate. The first backlight is provided in a first display area, the second light emitter is provided in the second display area, the first light emitter is provided in the first display area above the common electrode substrate, and the second display is provided. Preferably, the second backlight portion is provided in an area.

In addition, in the portable wireless terminal according to the present invention, a liquid crystal display panel having a first body provided with a keypad, a first display area and a second display area for displaying an image on different surfaces, and a first surface A first backlight unit provided to irradiate light to the first display area; a second backlight unit provided to a second surface to irradiate light to the second display area; and the first display area of the second surface. According to an aspect of the present invention, there is provided a portable wireless terminal including a second body provided with a double-sided liquid crystal display device including a first light-transmitting portion provided on the second light-transmitting portion provided on the second display area of the second surface.

In this case, it is preferable that the second body includes opening regions provided on the inner side and the outer side, and the first light transmitting portion is exposed to the inner opening region, and the second light transmitting portion is exposed to the outer opening region.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you.

In the drawings, the thickness of layers, films, panels, regions, etc., may be exaggerated for clarity, and like reference numerals designate like elements. In addition, when a part such as a layer, a film, an area, or a plate is expressed as being on or above another part, not only when each part is directly above or directly above the other part but also another part between each part and another part This includes cases.

1 is an exploded perspective view of a double-sided liquid crystal display according to a first embodiment of the present invention. 2 is a cross-sectional view of a double-sided liquid crystal display device according to a first embodiment. 3 and 4 are perspective views of the double-sided liquid crystal display according to the first embodiment.

1 to 4, a double-sided liquid crystal display according to the present exemplary embodiment includes a liquid crystal display panel 100 having a main display area A and a section display area B, and a main display area A. FIG. A main backlight 200 for irradiating light, a section backlight 300 for irradiating light to the section display area B, a main light projector 500 provided on the main display area A, A section light transmitting part 400 provided in the section display area B is included. The apparatus further includes a mold frame 600 for fixing the liquid crystal display panel 100, the backlight units 200 and 300, and the light transmitting units 400 and 500, and an accommodating member 700 therein.

The liquid crystal display panel 100 includes a thin film transistor substrate 110 having a pixel electrode and a thin firm transistor (TFT), a common electrode substrate 120 having a common electrode, and a liquid crystal layer provided between the two substrates. ).

The thin film transistor substrate 110 may include a plurality of pixel regions in a matrix form, and may be a light-transmissive insulating substrate including a thin film transistor and a pixel electrode provided in the pixel region. In this embodiment, it is effective to use a rectangular glass substrate as the thin film transistor substrate 110 as shown in the figure.

The source terminal of the thin film transistors is connected to a data line extending in one direction, and the gate terminal is connected to a gate line extending in another direction perpendicular to the one direction. The drain terminal is connected to a pixel electrode made of a transparent conductive material provided in a part of the pixel region. In this case, it is preferable to use indium tin oxide (ITO) or indium zinc oxide (IZO) as the transparent conductive material.

When the thin film transistor substrate 110 applies an electrical signal to the gate line and the data line, the thin film transistor is turned on or turned off, and thus the thin film transistor substrate 110 is applied to the electrical signal of the data line, that is, the pixel formation. The necessary electrical signal is applied to the pixel electrode.

To this end, it further includes a separate driver 130 for driving the gate line and the data line. In the present embodiment, as shown in the drawing, the gate driver 130 connected to the gate line for driving the gate of the thin film transistor has an IC mounted structure on one end of the thin film transistor. Of course, the gate line driver 130 is driven by a control signal of an external system. The data driver, which is not shown, may be mounted on a separate flexible circuit board and connected to the data line of the thin film transistor.

The common electrode substrate 120 is a pixel region corresponding to the thin film transistor substrate 110 and is preferably a transparent insulating substrate including a color filter and a common electrode provided in the pixel region.

The color filter and the common electrode may be disposed in a plurality of pixel areas corresponding to the pixel electrode, and the common electrode may be disposed on the entire surface of the common electrode substrate 120. In addition, the common electrode substrate 120 is preferably provided with a black matrix pattern for preventing light leakage. Here, a common voltage Vcom is applied to the common electrode.

The two substrates are pressed at a high temperature so that the pixel electrode and the common electrode of the thin film transistor substrate 110, the common electrode substrate 120, and the like are opposed to each other. In this case, a predetermined sealing film may be applied to seal the two substrates. In addition, a spacer may be provided to maintain a cell gap between the two substrates. Thereafter, the liquid crystal is injected and sealed between the two bonded substrates through liquid crystal injection to manufacture the liquid crystal display panel 100. Although liquid crystal injection is performed in the above, the liquid crystal may be scattered before bonding of the two substrates.

The liquid crystal display panel 100 manufactured as described above turns on the thin film transistor of the thin film transistor substrate 110 to apply an electrical signal necessary for pixel formation to the pixel electrode, and applies a common voltage to the common electrode of the common electrode substrate 120. When is applied, an electric field is formed between the pixel electrode and the common electrode. Such an electric field causes the arrangement of the liquid crystal layer to change, and the light transmittance is changed according to the changed arrangement to display a target image.

It is preferable to manufacture the said liquid crystal display panel 100 in a transmissive type. Of course, the present invention is not limited thereto and may be manufactured in a semi-transmissive type, and only a partial region of the liquid crystal display panel 100 may be manufactured in a semi-transmissive type. Polarizers may be attached to upper and lower surfaces of the liquid crystal display panel 100.

In this case, as described above, the liquid crystal display panel 100 is defined as a main display area A displaying an image on one side and a section display area B displaying an image on the other side. In other words, a single panel displays images on different sides. For example, the main display area A may display an image on a plane in the direction of the common electrode substrate 120, and the section display area B may display an image on a plane in the direction of the thin film transistor substrate 110. . In addition, fabrication of the unit pixels of the two display regions may be formed differently according to characteristics of the display region.

5 is a plan view illustrating a liquid crystal display panel according to an exemplary embodiment, and FIG. 6 is an enlarged conceptual view of region C of FIG. 5.

5 and 6, in the liquid crystal display panel 100 according to the present exemplary embodiment, a section display area B is defined at at least a portion of one side edge area, and the remaining area is defined as the main display area A. FIG. . Here, it is preferable that the area ratio of the section display area B and the main display area A is in the range of 1: 1 to 1:20. In addition, although FIG. 5 illustrates that the section display area B is positioned at the upper one side edge area of the liquid crystal display panel 100 with the same width as the main display area A, the present invention is not limited thereto. The area B may be formed in any area of the liquid crystal display panel 100 and may be formed smaller than the width of the main display area A. FIG. As shown in the drawing, an area where the gate driver 130 is mounted is preferably provided at one side of the liquid crystal display panel 100.

The main display area A and the section display area B may display different images by receiving driving voltages through different driving units, or may display the same image by inverting them. Alternatively, different operations may be displayed on the main display area A and the section display area B by separating the operation in the drive unit through the single drive unit. The main display area A preferably displays images of various data values, and the section display area B preferably displays images of a single data value. That is, when the liquid crystal display panel 100 defined as described above is applied to a portable terminal (for example, a dual type clamshell cellular phone), the section display area B may include a date, a time, an antenna, It is desirable to display simple data such as battery status. Thus, as shown in FIG. 6, the main display area A is made of a structure having three sub-pixels emitting R, G, and B colors in a single pixel, thereby displaying an image of all natural colors. As shown in the drawing, the section display area B is fabricated in a structure in which a single pixel emits one of R, G, and B colors. As a result, an image of the same color may be displayed in the predetermined area. It is preferable to display an image using a single color since only the image corresponding to the same data value is always displayed in the section display area B. FIG. Furthermore, since one large pixel is used in the unit pixel, the design of the section display area B can be simplified, the signal line can be reduced, and the aperture ratio can be improved.

Of course, the present invention is not limited thereto, and the present invention may be manufactured in a structure having three subpixels emitting R, G, and B colors in the unit pixels of the section display area B. FIG.

Meanwhile, in the present embodiment, it is preferable to provide the backlight units 200 and 300 including the optical sheet on the opposite side of the active region where the liquid crystal display panel 100 is visually recognized.

The main display area A is visually recognized in the upper side direction (common electrode substrate direction side) of the liquid crystal display panel 100, and the section display area B is the lower side direction of the liquid crystal display panel 100 (thin film transistor). In the case of visual recognition, the main backlight unit 200 is disposed in the lower region of the liquid crystal display panel 100, and the section backlight unit 300 is disposed in the upper region. .

The main backlight unit 200 is provided on a portion of the lower side of the liquid crystal display panel 100, and as shown in FIGS. 1 and 2, the light source 210 and the light of the light source 210 are provided. The light guide plate 220 irradiated to the main display area A of the liquid crystal display panel 100, the plurality of optical sheets 240 provided on the light guide plate 220, and the reflective plate 230 provided below the light guide plate 220. ).

It is preferable to use a white LED lamp as the light source 210. And, although not shown in the figure, such LED lamps are preferably mounted on a flexible circuit board. The light source 210 may be disposed on any surface of the main display area A of the liquid crystal display panel 100, but preferably, the light source 210 is disposed at an edge area facing the section display area B. At least one white LED lamp may be used, but the white LED lamps may be spaced at uniform intervals to supply uniform white light to the entire light guide plate.

The light guide plate 220 is disposed adjacent to the light source 210 to change light having an optical distribution in the form of a line light source generated by the light source 210 to light having an optical distribution in the form of a surface light source. As the light guide plate 220, a wedge type plate or a parallel flat plate may be used. In addition, the light guide plate 220 is generally formed of high polymethylmethacrylate (PMMA) having high strength and not easily being deformed or broken.

The reflective plate 230 is provided below the light guide plate 220. At this time, the reflective plate 230 serves to reduce the light loss by re-reflecting the light incident on the light guide plate 220 through the back of the light guide plate 220 using a plate having a high light reflectance.

The plurality of optical sheets 240 include a diffusion sheet, a brightness enhancing sheet, and a polarizing sheet, which are disposed between the light guide plate 220 and the main display area A of the liquid crystal display panel 100 and exit from the light guide plate 220. The luminance distribution of the received light is made uniform and irradiated to the main display area A. FIG. The diffusion sheet directs the light incident from the light guide plate 220 toward the front of the liquid crystal display panel 100 and diffuses the light to have a uniform distribution in a wide range so that the liquid crystal display panel 100 is irradiated. As the diffusion sheet, it is preferable to use a film composed of a transparent resin coated with a predetermined light diffusion member on both surfaces. The polarizing sheet serves to change the light incident obliquely among the light incident on the polarizing sheet to be emitted vertically. In addition, the brightness improving sheet transmits light parallel to its transmission axis and reflects light perpendicular to the transmission axis. The transmission axis of such a brightness improving sheet is preferably the same as the polarization axis direction of the polarizing sheet in order to increase the transmission efficiency.

The main backlight unit 200 as described above is provided on the lower surface of the main display area A of the liquid crystal display panel 100. As a result, the liquid crystal display panel 100 corresponding to the main display area A may be protected from external impact.

In the present exemplary embodiment, a section light transmitting part 400 is provided on a lower side of the liquid crystal display panel 100 in which the main backlight unit 200 is not provided. As a result, the liquid crystal display panel 100 corresponding to the section display area B may be protected from an external impact, and the luminance may be improved by improving light transmittance. The section light transmitting part 400 includes a protective layer 420 provided on the section display area B of the liquid crystal display panel 100, and an impact absorbing layer provided between the protective layer 420 and the liquid crystal display panel 100. 410. The shock absorbing layer 410 is preferably a light transmitting material in the form of a gel. As a result, the external shock may be absorbed to absorb the shock applied to the liquid crystal display panel 100. As the protective layer 420, it is preferable to use a light-transmitting material having a high strength. In this case, the impact absorbing layer 410 and the protective layer 420 preferably use a material having a light transmission efficiency of 80% or more to minimize the loss of light. In addition, it is effective to prevent a phenomenon in which light is reflected between the interfaces of each layer by using a material having a refractive index similar to that of the liquid crystal display panel 100. By providing the above-described section light transmitting part 400, the window made of a transparent plastic or glass prepared to protect the liquid crystal display panel 100 in the existing portable terminal can be used. This can reduce the overall size of the portable terminal.

Next, the section backlight unit 300 is provided on a portion of an upper side of the liquid crystal display panel 100, and as shown in the drawing, the light source 310 and the light of the light source 310 are disposed in the liquid crystal display panel. A light guide plate 320 irradiated to the section display area B of 100, a plurality of optical sheets 340 provided below the light guide plate 320, and a reflecting plate 330 provided above the light guide plate 320. do.

A white LED lamp is used as the light source 310. The light guide plate 320 uses a plate that can change the light in the form of a linear light source into a surface light source. The light guide plate 320 may be provided above the section display area B of the liquid crystal display panel 100. The reflecting plate 330 is provided on the light guide plate 320 and uses a plate having a high light reflectance. An optical sheet 340 including at least one of a diffusion sheet, a brightness enhancement sheet, and a polarizing sheet is provided between the light guide plate 320 and the section display area B of the liquid crystal display panel 100 and irradiated from the light guide plate 320. The light may be uniformly irradiated onto the liquid crystal display panel 100.

In the liquid crystal display panel 100, the above-described section backlight 300 is provided on an upper surface of the section display area B to protect the section display area B from external impact. However, since the light is not transmitted, the image corresponding to the area corresponding to the section display area B is difficult to see from the upper side.

In the main display area A, in which the section backlight unit 300 is not provided, the light of the main backlight unit 200 provided below the light passes through the liquid crystal display panel 100, thereby displaying an image. In addition, in the present exemplary embodiment, the main light transmitting part 500 is provided on the upper surface of the main display area A in which the section backlight part 300 is not provided. That is, the main light transmitting part 500 may be provided above the main display area A, thereby protecting the upper surface of the main display area A from external impact. In this case, the main light transmitting part 500 includes a protective layer 520 and an impact absorbing layer 510 made of a light transmitting material. The shock absorbing layer 510 is preferably made of a light transmitting material in the form of a gel. As a result, the external shock may be absorbed to absorb the shock applied to the liquid crystal display panel 100. The protective layer 520 preferably uses a high strength light transmitting material. In this case, the impact absorbing layer 510 and the protective layer 520 preferably use a material having a light transmission efficiency of 80% or more to minimize light loss. In addition, it is effective to prevent a phenomenon in which light is reflected between the interfaces of each layer by using a material having a refractive index similar to that of the liquid crystal display panel 100. As such, the present embodiment may not use a window made of a transparent plastic or glass provided by the main light transmitting part 500 to protect the main display area A of the liquid crystal display panel 100 in the existing portable terminal. Will be. This can reduce the overall size of the portable terminal and increase the transmittance.

And a mold frame 600 which fixes and supports the main backlight unit 200, the liquid crystal display panel 100, and the section backlight unit 300 described above. It is preferable that the mold frame 600 is formed in a rectangular frame shape and a part of the mold frame 600 is refracted as shown in the drawing. In this case, the mold frame 600 is preferably refracted at the boundary between the main display area A and the section display area B of the liquid crystal display panel 100. As a result, the liquid crystal display panel 100 is provided in the center of the mold frame 600, the main backlight unit 200 is fixedly supported at the lower side, and the section backlight unit 300 is fixedly supported at the upper side. In addition, the section light transmitting portion 400 provided in the adjacent region of the main backlight unit 200 is coupled on the refracted mold frame 600, and the main light transmitting portion provided in the adjacent region of the section backlight unit 300. 500 is coupled on the refracted mold frame 600.

The mold frame 600 is provided with a predetermined protrusion for fixing the liquid crystal display panel, and a fixing part 610 for fixing the light sources 210 and 310 of the backlight units 200 and 300 is provided. A predetermined through hole 620 is provided in the fixing part 610 so that the light sources 210 and 310 are introduced into the fixing part 610. And it is effective that the protrusion 630 to be coupled to the receiving member 700 on the outside of the mold frame 600 is provided.

The present invention provides an accommodating member 700 coupled to the mold frame 600. The accommodating member 700 has a shape surrounding the side surface of the liquid crystal display panel 100, the main backlight unit 200, the section backlight unit 300, the main light transmitting unit 500, and the section light transmitting unit 400. Is produced. As shown in the figure, a part of the accommodating member 700 of the present embodiment is preferably refracted, and it is effective that the through hole 710 corresponding to the protrusion 630 of the mold frame 600 is provided. .

Here, the mold frame 600 is made of a plastic-based material, and the receiving member 700 is preferably made of a metallic material such as aluminum.

The liquid crystal display device manufactured as described above is manufactured in a rectangular parallelepiped shape as shown in FIGS. 3 and 4, and the thickness of the liquid crystal display device can be reduced by using a single liquid crystal display panel 100. As shown in FIG. 3, an image of the main display area A can be displayed on the upper side of the liquid crystal display, and a main to protect the liquid crystal display panel 100 on the main display area A. FIG. The miner 500 may be provided so as not to form a separate window. In addition, a section backlight unit 300 is provided at an upper side edge to protect the liquid crystal display panel 100 under the upper side edge. As shown in the drawing, the height of the main light transmitting part 500 may be made uniform with the section backlight 300 to prevent an increase in thickness of the liquid crystal display. Of course, the present invention is not limited thereto, and the height of the main light transmitting part 500 may be higher. Similarly, as shown in FIG. 4, an image of the section display area B may be displayed on the lower side of the liquid crystal display, and a section light transmitting part 400 is provided below the liquid crystal display panel 100. To protect. Of course, the main backlight unit 200 is provided on the lower side to protect the liquid crystal display panel 100.

In the above description, the main light transmitting part 500 and the section light transmitting part 400 are provided in the main display area A and the section display area B of the liquid crystal display panel 100, respectively, but are not limited thereto. It may be provided in the entire area of the panel 100. That is, part of the protective layers 420 and 520 of the light transmitting parts 400 and 500 may extend to the upper side of the backlight parts 200 and 300.

As described above, in the present exemplary embodiment, the liquid crystal display panel is divided into a main display area and a section display area for displaying an image on different surfaces, thereby displaying an image in both lateral directions. In addition, since the image can be displayed on both sides using one liquid crystal display panel, the thickness thereof can be reduced as compared with a structure using two conventional liquid crystal display panels. In addition, both the main display area and the section display area may be manufactured in a transmissive type to reduce the manufacturing cost of the liquid crystal display, and at least one of the regions may be manufactured in a transflective type to reduce power consumption.

In addition, when the liquid crystal display device is applied to a portable terminal, the thickness of the entire terminal can be reduced and optical brightness can be improved. The following describes a portable wireless terminal according to a second embodiment of the present invention. Descriptions overlapping with the above-described embodiments will be omitted.

7 is a diagram of a portable wireless terminal according to a second embodiment of the present invention.

As illustrated in FIG. 7, the first body 1000 provided with the keypad 1100 and the second body 2000 provided with the liquid crystal display 2100 are included. Preferably, the first and second bodies 1000 and 2000 are combined in a folder type. At this time, it is preferable that an antenna device (not shown) is mounted on one side of the first body 1000, and a microphone unit 1200 is further provided below the first body 1000. It is effective that the speaker unit 2200 is further provided on the second body 2000.

Although not shown in the first body 1000, a control unit for controlling the overall operation of the portable wireless terminal, a wireless unit connected to the antenna device for managing transmission and reception of voice data and control data, and received by the wireless unit The voice processing unit converts the voice data into an audible sound and outputs it through the speaker unit 2200, or converts the voice data received from the microphone unit 1200 into a wireless unit and outputs the voice data to the wireless unit, and input data of the keypad 1100 to the controller. It includes a key input unit for transmitting.

Here, the second body 2000 is provided with a double-sided liquid crystal display 2100 for displaying an image according to the control signal of the controller. In the double-sided liquid crystal display device 2100, a main display area A and a sub display area B are defined in a single liquid crystal display panel, and the main display area A is inside the second body 2000. It is preferable to expose the area in contact with the first body 1000 and the sub display area B to be exposed to the upper side of the second body 2000. The main light transmitting part and the sub light transmitting part are provided in the main display area A and the sub display area B of the double-sided liquid crystal display device 2100 of the present embodiment. In addition, it is preferable that a predetermined opening area is provided at an inner side and an outer side of the second body 2000 so that the light transmitting portion of the liquid crystal display 2100 is exposed to the opening area.

As such, in the present exemplary embodiment, the light transmitting part of the liquid crystal display 2100 may be directly exposed so that the window for protecting the existing liquid crystal display panel may not be disposed, thereby reducing the thickness of the portable wireless terminal. In addition, the luminance may be improved by increasing the transmission efficiency. In other words, when an existing window is disposed, an air gap exists between the window and the liquid crystal display panel, and the light transmission efficiency is 91.6%. At this time, the luminance at the panel was 202.1 cd / m 2, but the luminance outside the portable wireless terminal is reduced to 185.3 cd / m 2. However, when the light transmitting portion was provided above the liquid crystal display panel and the window was removed as in the present embodiment, the light transmission efficiency was 97.4%. The luminance in the panel was 202.1 cd / m 2 and the luminance outside the portable radio terminal was 196.9 cd / m 2. Thus, it can be seen that the transmission efficiency of the portable wireless terminal to which the double-sided liquid crystal display device of the present embodiment is increased is 5.8%.

As described above, the present invention can display an image in both side directions by separating a single liquid crystal display panel into a main display region and a section display region, and reduce the overall thickness of the liquid crystal display and the portable terminal including the same. .

In addition, the main display area and the section display area may be manufactured in a transmissive type to reduce the manufacturing cost of the liquid crystal display, and at least one of the regions may be manufactured in a transflective type to reduce power consumption.

In addition, the same image or different images can be displayed on both sides through different driving units or a single driving unit.

In addition, the resolution of an image that can be represented by different unit pixels in the main display area and the section display area can be variously adjusted at the time of manufacture, and the luminance of the signal line can be reduced and the aperture ratio can be improved.

In addition, a high-intensity light-transmitting part may be provided in the exposed main display area and the section display area to protect the liquid crystal display device from external shock, and when applied to a portable terminal, a protection member for protecting a separate liquid crystal display device is not provided. It can not reduce the manufacturing cost and manufacturing cost can be reduced, and can improve the brightness.

Although the invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the invention is not limited thereto, but is defined by the claims that follow. Accordingly, one of ordinary skill in the art may variously modify and modify the present invention without departing from the spirit of the following claims.

Claims (10)

A liquid crystal display panel having a first display area and a second display area for displaying images on different surfaces, respectively; A first backlight unit provided on a first surface of the liquid crystal display panel to irradiate light to the first display area; A second backlight unit provided on a second surface of the liquid crystal display panel to irradiate light to the second display area; A first light transmitting part provided on the first display area of the second surface; And a second light transmitting part provided on the second display area of the first surface. The method of claim 1, And a light emitting part having the same thickness as that of the backlight part. The method according to claim 1 or 2, The light transmitting part includes a protective layer and a shock absorbing layer provided between the protective layer and the liquid crystal display panel. The method according to claim 1, A double-sided liquid crystal display device forming the first and second display areas of the liquid crystal display panel in a transmissive type, or at least one of the first and second display areas in a transflective type. The method according to claim 1, The second display area is provided on at least a portion of one side edge of the liquid crystal display panel, and an area ratio of the first display area and the second display area is in a range of 1: 1 to 1:20. The method according to claim 1, And a plurality of sub pixels provided in one pixel of the first display area, and at least one sub pixel provided in one pixel of the second display area. The method according to claim 6, An R sub pixel, a G sub pixel, and a B sub pixel are provided in one pixel of the first display area, and at least one of an R sub pixel, a G sub pixel, and a B sub pixel is included in one pixel of the second display area. A double-sided liquid crystal display device provided with subpixels. The method according to claim 5, The liquid crystal display panel includes a thin film transistor substrate on which a pixel electrode and a thin film transistor are formed, a liquid crystal layer provided between the common electrode substrate on which the common electrode is formed, the thin film transistor substrate, and the common electrode substrate, The first backlight unit is provided in the first display area under the thin film transistor substrate, and the second light transmitting part is provided in the second display area. And a first backlight unit disposed in the first display area above the common electrode substrate, and the second backlight unit disposed in the second display area. In a portable wireless terminal, A first body provided with a keypad; A liquid crystal display panel having a first display area and a second display area for displaying images on different surfaces, a first backlight unit provided on the first surface for irradiating light to the first display area, and a second surface A second back light portion provided on the second display region to irradiate light to the second display region, a first light transmitting portion provided on the first display region of the second surface, and on the second display region of the second surface; A portable wireless terminal comprising a second body provided with a double-sided liquid crystal display including a second light transmitting part. The method according to claim 9, The second body includes an opening area provided on the inside and the outside, And the first light transmitting portion is exposed to the inner opening region, and the second light transmitting portion is exposed to the outer opening region.

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