KR20050070971A - Detachable liquid crystal display device for two-surface display - Google Patents

Abstract

A double-sided display liquid crystal module having a light guide plate having a plurality of patterns formed therein capable of emitting incident light on both sides, a functional optical sheet respectively positioned on both sides of the light guide plate, and a pair of liquid crystal panels respectively positioned outside the functional optical sheet. and; A removable double-sided display liquid crystal display device including a lamp for supplying light to a light guide plate of the double-sided display liquid crystal module and a cradle having an interface for supplying image information and power to the pair of liquid crystal modules. The light guide plate may further include dummy patterns formed on the front and rear surfaces thereof.

Accordingly, it contributes to the thinness and light weight of the double-sided display liquid crystal display module, which is convenient to carry, and is mounted on the cradle installed in the necessary place while carrying only the liquid crystal module, so that it can be used in various ways from TV, video, digital camera, computer, etc. Image information can be displayed.

Description

Detachable liquid crystal display device for two-surface display}

The present invention relates to a liquid crystal display device, and more particularly, to a portable liquid crystal display module.

Liquid crystal display device (hereinafter, LCD) includes two substrates and a liquid crystal filled therebetween, and is a display device that converts electrical information into visual information and transmits it to humans by controlling the liquid crystal. . Compared to the CRT type, the LCD has less eye fatigue and is thinner. Therefore, the LCD is widely used not only for portable computers but also for TVs and monitors.

Looking at the configuration of such a liquid crystal display device, as shown in Figure 1, the upper and lower liquid crystal display panel 10 including a liquid crystal between the lower panel, the backlight unit 20, and a top case (top) for combining them a case 31 and a rear case (real case) 32 are provided. Here, the backlight unit 20 has a light source placed on the rear surface of the liquid crystal panel 10 so as to directly illuminate the front surface of the substrate, and a light source placed on one or both sides of the substrate to reflect and diffuse light rays by a light guide plate and a reflecting plate. It is divided into edge type (or metering type), and it is mainly used for edge type backlight which can be applied to notebook.

However, in the case of large-sized TVs and monitors, a direct type with some light guide plates and prism removed to enhance luminance is used. In the case of 26 inches, about 16 light sources (CCFLs) are used.

The backlight unit is composed of a functional optical film such as a scattering plate and a diffusion sheet in addition to the lamp.

FIG. 2 illustrates a structure in which light is transferred from the edge type backlight unit to the liquid crystal panel. As shown in FIG. 2, light emitted from the lamp 21 is redirected through the light guide plate 22, and the diffusion plate 25 is illustrated. Through the optical sheet 27, such as the linear light source is shown to change the surface light source. It is preferable that the fine pattern 22a is formed in the light guide plate 22, and the reflecting plate 24 for improving light efficiency is located in the back surface of the light guide plate 22. As shown in FIG.

However, since the structure of the light guide plate 22 is manufactured by injection molding, scattering pattern printing, and groove cutting by a mold, the internal structure of the light guide plate 22 may not be molded, and thus the light guide plate 22 may not be used for double-side display.

In addition, since the backlight unit and the panel are coupled together, there is a reliability problem such as, for example, the circuit is overheated or the current of the inverter is reduced due to heat emitted from the lamp of the backlight unit.

In addition, according to the tendency to make the width of the light guide plate as small as possible in order to achieve a thin shape, the capacity according to the size of the lamp can not be limited, there is a problem to adopt expensive sheets to increase the efficiency of light as a functional optical sheet. .

The present invention has been made to solve the above problems, an object of the present invention is a removable liquid crystal consisting of a liquid crystal module separated from the light source, and a cradle (cradle) to which the light source is mounted and interfaces with the liquid crystal module. To provide a display device, the liquid crystal module to provide a removable display device capable of a two-sided display.

Other objects of the present invention will be understood from the accompanying drawings and the following detailed description.

In order to achieve the above object, the present invention provides a light guide plate formed therein a plurality of patterns capable of emitting incident light on both sides, a functional optical sheet respectively located on both sides of the light guide plate, and as long as the outer side of the functional optical sheet, respectively A double-sided display liquid crystal module having a pair of liquid crystal panels; A removable double-sided display liquid crystal display device including a lamp for supplying light to a light guide plate of the double-sided display liquid crystal module and a cradle having an interface for supplying image information and power to the pair of liquid crystal modules.

The liquid crystal module may include an image control signal receiver for receiving image information and an image control signal, a power supply unit for receiving power, and a timing controller for displaying image information on each liquid crystal panel according to the image control signal. In this case, the cradle receives an inverter for providing AC power, an image information receiving unit receiving image information from the outside to provide image information to the liquid crystal module, a lamp receiving AC power from the inverter, and receiving at the image information receiving unit. And an interface for transmitting one image information to an image control signal receiver of the liquid crystal module.

The image control receiver of the liquid crystal module may be located on one side or side of the liquid crystal module.

The light guide plate may further include dummy patterns formed on a front surface and a rear surface thereof.

The image information receiver may include a digital video interactive (DVI), a Svideo, a component, a composite, and a USB.

The liquid crystal module may include a charging unit, and charging may be performed when mounted on the cradle.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same and similar elements are given the same and similar reference numerals in the respective drawings.

Referring to FIG. 3, a liquid crystal display device for a double-sided display according to an exemplary embodiment of the present invention is disposed between the first and second liquid crystal panels 110a and 110b and the first and second liquid crystal panels 110a and 110b. The backlight unit 130 irradiates light to the liquid crystal panels 110a and 110b.

Each of the first and second liquid crystal panels 110a and 110b has liquid crystal injected between the upper substrates 102a and 104a and the lower substrates 102b and 104b, and the upper substrates 102a and 104a and the lower substrates 102b and 104b, respectively. It is provided with a spacer (not shown) to keep the gap therebetween constant.

Each of the upper substrates 102a and 104a of each of the first and second liquid crystal panels 110a and 110b includes a color filter, a common electrode, a black matrix, and the like, which are not shown. In addition, signal lines such as a data line and a gate line (not shown) are formed on each of the lower substrates 102b and 104b of each of the first and second liquid crystal panels 110a and 110b. Thin film transistors (hereinafter referred to as "TFTs") are formed. The TFT switches the data signal to be transmitted from the data line to the liquid crystal cell in response to the scan signal (gate pulse) from the gate line. The pixel electrode is formed in the pixel region between the data line and the gate line.

In addition, pad regions are formed at one side of each of the lower substrates 102b and 104b to connect the data lines and the gate lines, respectively, to transmit data and scan signals to the data lines and the gate lines, respectively. Supply. An upper polarizer (not shown) for polarizing light from the backlight unit 130 is attached to the front surface of each of the first and second liquid crystal panels 110a and 110b, and the first and second liquid crystal panels 110a, 110b) Attached is a lower polarizer, not shown, which polarizes light via each other.

The backlight unit 130 receives the lamps 122, the lamp housings 124 surrounding each of the lamps 122, and the light incident from the lamps 122 to the first and second liquid crystal panels 110a and 110b. Light guide plate 114 for advancing toward the < RTI ID = 0.0 >), < / RTI > first plurality of optical sheets 116a, 118a, 120a stacked on the front surface of the light guide plate 114 and a second plurality of optical sheets stacked on the back surface of the light guide plate 114. Fields 116b, 118b, and 120b.

Each of the lamps 122 is mainly a cold cathode fluorescent lamp, and is disposed on each side of the light guide plate 114. Light generated by the lamps 122 is incident on the light guide plate 114 through an incident surface existing on the side of the light guide plate 114.

Each of the lamp housings 124 has a reflective surface on its inner surface to reflect light from each lamp 122 toward the incident surface of the light guide plate 114. The light guide plate 114 passes through the incident surface.

The light incident from each of the lamps 122 is converted into a planar light source and emitted toward the first and second liquid crystal panels 110a and 110b.

To this end, patterns 126 such as spheres, polygons, combs, sprite stripes and dots are formed in the inner center of the light guide plate 114 by a laser processing technique. The patterns 126 in the light guide plate 114 bidirectionally scatter the light incident through the incident surface to emit light to the front and rear surfaces of the light guide plate 114 as shown in FIG. 4.

The first plurality of optical sheets 116a, 118a, and 120a vertically generate light emitted from the front surface of the light guide plate to improve light efficiency. To this end, the diffusion sheet 116a for diffusing the light emitted from the light guide plate to the entire area, and the first angle of the two sheets for raising the propagation angle of the light diffused by the diffusion sheet 116a perpendicular to the first liquid crystal panel 110a. Prism sheets 118a and 120a are provided. Accordingly, the light emitted from the light guide plate is incident on the first liquid crystal panel 110a via the first lower and upper prism sheets 118a and 120a via the first diffusion sheet 116a.

The second plurality of optical sheets 116b, 118b, and 120b vertically emits light emitted from the rear surface of the light guide plate to improve light efficiency and enter the second liquid crystal panel 110b.

In the liquid crystal display device for a double-sided display according to the embodiment of the present invention, the light guide plate 114 of the backlight unit 130 is spherical, polygonal, comb-shaped, sprite type on the inner surface of the light guide plate 114 using a laser processing method. The light incident from the lamps can be emitted in both directions by forming the stripes and lighting patterns 126. Accordingly, in the liquid crystal display device for a double-sided display according to the embodiment of the present invention, the backlight unit can remove the reflector disposed on the rear surface of the conventional light guide plate.

FIG. 5 illustrates dummy patterns 132a and 132b formed on the front and rear surfaces of the light guide plate 114 of FIG. 3, and the dummy patterns 132a and 132b are patterns formed inside the light guide plate 114. It serves to reflect and diffuse the light emitted in both directions by the 126. The functional optical sheets 116a, 116b, 118a, and 118b stacked on both surfaces of the light guide plate 114 due to the dummy patterns 132a and 132b. , 120a, 120b) can be reduced.

FIG. 6 illustrates an example in which a double-sided display liquid crystal display having a structure of FIG. 3 or 5 is divided into a cradle having a double-sided display liquid crystal module excluding a ram and a lamp 210.

In the dummy area below the display area 500 on one surface of the double-sided liquid crystal module 100

There is a first connector 160, the slide groove (groov) (170) is formed on both sides to be mounted on the clay 200 in a slide method. When the slide protrusion 270 corresponding to the slide groove 170 of the liquid crystal module 100 slides, that is, is formed downward from the top, and the liquid crystal module 100 slides and is mounted on the cradle 200. A third connector 260 is positioned at a position corresponding to the position of the first connector 160 so that the first and third connectors 160 and 260 are connected when mounted.

It is preferable that the slide protrusion 270 and the slide groove 170 are provided in pairs, respectively, but only one corresponding to each other may be considered, and a separate fixture may be considered. .

Here, the first and third connectors 160 and 260 adopt a low voltage differential signaling (LVDS) transmission method. LVDS is a transmission method for sending digital information to a flat panel display at high speed through copper wire, using a voltage lower than the standard voltage of 5V, and laptop computers because fewer wires can be used between the motherboard and the panel. Widely used in.

On the other hand, the power supply is made through the second and fourth connectors 165 and 265 through a connection with the cradle 200, which is substantially included in the first and third connectors 160 and 260. Or it can be made separately. When the liquid crystal module 100 has a battery 400, the second and fourth connectors may be charging units. In this case, the second connector 165 is connected to the battery 400.

In addition, the connectors may be located on the side of the cradle 200 and the side of the double-sided display liquid crystal module 100, respectively, in this case, the problem that the display area is reduced due to the connector will not occur.

    7A and 7B show that the interface connectors 160 and 260, which are the first and third connectors, are mounted on the side, and the double-sided display liquid crystal module 100 slides from the side toward the third connector 260. There is a method of connecting and securing the latch 280 at the mounting end opposite to the third connector, that is, the interface connector 260, for fixing the module 100. The latch 280 is operated by a spring, and can be slid from one side by changing the inclined surfaces on both sides, it is preferable to limit the movement from the other side. In this case, when the liquid crystal module 100 is separated from the cradle 200, the liquid crystal module 100 may be separated upward.

FIG. 8 is a block diagram of the liquid crystal module 100 and the cradle 200 having the structure of FIG. 6, the rear surface of the double-sided liquid crystal module 100 having an interface with the cradle 200 (see 160 of FIG. 6). A timing controller 300 that receives data (RGB Data) and control signals (for example, a pressure clock, a horizontal synchronization signal, a vertical synchronization signal, and a data enable signal) input through the image signal control signal receiver 380; There is a data drive IC 310a and a gate drive IC 320a. The timing controller 300 includes a data drive 310 including a plurality of drive ICs 320a mounted on a PCB (450 of FIG. 6) using the input control signal 330, and a plurality of gate drive ICs 320a. Generates a control signal for driving the gate drive 320 consisting of.

When the liquid crystal module 100 is connected to the cradle 200, the liquid crystal panel 110 receives the power supply 340, the R, G, and B control signals, and the R, G, and B signals from the cradle 200 according to gray levels. Send it to and display it.

On the other hand, the cradle 200 has a scaler 350 in addition to the inverter 220 for the lamp, and receives the digital control signal 330a and the analog control signal 330b from the image information receiving connector 230 to meet various display standards. The corresponding image signals and control signals are converted into image signals and control signals meeting the resolution and display standard of the liquid crystal display panel and supplied to the liquid crystal display panel through the interface unit 360. This video receiving connector 230 may include Digital Video Interactive (DVI), Svideo, Component, Composite, USB, for example, DVI for TV and Video, Composite for Digital Camera, Svideo for TV, USB Computers and components are for receiving various image information such as TVs.

Starting from the basic concept of the present invention, but described various examples, such as the mounting method, the various magnetic structures of the cradle, but this is only an example and various changes and modifications are possible without departing from the spirit of the present invention, It will be understood through the claims that all modifications fall within the scope of the present invention.

As described above, according to the present invention, by reducing the number of functional optical sheet, carrying only the double-sided display liquid crystal module that can be displayed on both sides, and mounted on the cradle installed in the necessary place, TV, video, digital camera, Various image information from a computer or the like can be displayed.

1 is an exploded perspective view of a conventional liquid crystal display device.

Figure 2 is a schematic diagram showing the light transmission path of the backlight unit.

3 is a block diagram showing the basic concept of the present invention.

4 is a schematic view showing the light transmission path in FIG.

5 is a schematic view showing another embodiment of a light guide plate;

FIG. 6 is a configuration diagram illustrating a coupling relationship between a double-sided display liquid crystal module and a cradle having the structure shown in FIG. 3; FIG.

7A and 7B are diagrams illustrating another coupling relationship between the double-sided display liquid crystal module and the cradle according to another embodiment of the present invention.

8 is a block diagram illustrating an information delivery path of FIG. 6.

* Brief description of symbols for the main parts of the drawings *

100: liquid crystal module 110a, 110b: liquid crystal panel

130: backlight unit 114: light guide plate

200: cradle 210: lamp

400: battery

Claims (12)

A double-sided display liquid crystal module having a light guide plate having a plurality of patterns formed therein capable of emitting incident light on both sides, a functional optical sheet respectively positioned on both sides of the light guide plate, and a pair of liquid crystal panels respectively positioned outside the functional optical sheet. and; A lamp for supplying light to the light guide plate of the double-sided display liquid crystal module; Cradle having an interface unit for supplying image information and power to the pair of liquid crystal modules Removable double-sided display liquid crystal device comprising a The method according to claim 1, The double-sided display liquid crystal module includes an image control signal receiving unit for receiving image information and an image control signal, a power supply unit for receiving power, and a timing controller for displaying image information on each liquid crystal panel according to the image control signal. The cradle has an image information receiver for receiving image information from the outside to provide image information to the liquid crystal module, and the interface unit transmits the image information received by the image information receiver to the image control signal receiver of the liquid crystal module. Removable double-sided display liquid crystal display device. The method according to claim 2, The image control receiver of the double-sided display liquid crystal module is a removable double-sided display liquid crystal display device located on the outer surface of the selected one of the pair of liquid crystal panel. The method according to claim 2, The image control receiver of the liquid crystal module is a removable double-sided liquid crystal display device located on the side of the liquid crystal module. The method according to claim 2, The image information receiver includes a DVI (Digital Video Interactive), Svideo, component, composite, USB. The method according to claim 1, The lamp is a removable double-sided liquid crystal display device positioned on either side or one side of the light guide plate or directly on the light guide plate. The method according to claim 1, And the lamp is located on the cradle. The method according to claim 6 or 7, The cradle further includes an inverter for providing AC power to the lamp. The method according to claim 1, The light guide plate further comprises a dummy pattern formed on the front and rear surfaces. The method according to claim 1, And the interface unit adopts an LVDS transmission method. The method according to claim 1, And the liquid crystal module slides and mounted on the cradle. The method according to claim 1, And a battery for supplying power to the liquid crystal panel.