KR102563967B1 - Dual screen display device - Google Patents

Abstract

An example of the present invention relates to a dual screen display device that displays an image in a dual screen method using only one display device that implements an original image without an external monitor. A dual screen display device according to an example of the present invention includes a first display panel displaying a first image, a second display panel disposed on a rear surface of the first display panel and displaying a second image, and a rear surface of the second display panel. It includes a rear cover disposed on. A dual screen display device according to an example of the present invention may implement a dual screen mode by using a second display panel that is exposed to the outside while sliding. Accordingly, in one embodiment of the present invention, a dual screen mode can be implemented using one display device without using a separate external monitor.

Description

Dual screen display device {DUAL SCREEN DISPLAY DEVICE}

One example of the present invention relates to a dual screen display device.

In the information society, many related technologies are being developed in the field of a display device for displaying visual information as an image or image. The display device includes a display panel having a display area provided with pixels displaying an image and a non-display area disposed outside the display area and not displaying an image, a gate driver supplying a gate signal to the pixels, and a data voltage to the pixels. It includes a data driver to supply and a timing controller to supply signals for controlling the gate driver and the data driver.

In addition, in order to simultaneously display two types of images or images, a dual screen type display device having two display panels is used. The dual screen display device simultaneously displays two independent images or related associations on two display panels so that the two images can be viewed simultaneously. In the case of expanding the screen and expressing it, the image was expressed on a larger display panel.

Existing dual-screen display devices express two images at the same time by connecting cables to ports such as DVI, DP, and HDMI to a separate display device such as an external monitor. Accordingly, in order to express a dual screen image, two display devices, a display device implementing an original image and an external monitor, must be provided separately.

One example of the present invention is to provide a dual screen display device that displays an image in a dual screen method using only one display device that implements an original image without an external monitor.

A dual screen display device according to an example of the present invention includes a first display panel displaying a first image, a second display panel disposed on a rear surface of the first display panel and displaying a second image, and a rear surface of the second display panel. It includes a rear cover disposed on. A rear cover rail for moving the second display panel is disposed on the front side of the rear cover according to an embodiment of the present invention, and rear cover rail stoppers are disposed at both ends of the rear cover rail. The second display panel according to an example of the present invention moves to the upper side, left side, or right side of the first display panel to expose the second image to the outside.

A dual screen display device according to an example of the present invention may implement a dual screen mode by using a second display panel that is exposed to the outside while sliding. Accordingly, in one embodiment of the present invention, a dual screen mode can be implemented using one display device without using a separate external monitor. In addition, since there is no need to use a cable to connect to an external monitor, the dual screen mode can be implemented more conveniently.

1 is a perspective view illustrating a case in which a dual screen display device according to an embodiment of the present invention displays only a first image.
2 is a perspective view illustrating a case in which a second image is displayed above a first image in a dual screen display device according to an embodiment of the present invention.
3 is a perspective view illustrating a case in which a second image is displayed on the right side of a first image in a dual screen display device according to an embodiment of the present invention.
4 is a block diagram of a first display panel unit according to an embodiment of the present invention.
5 is a circuit diagram illustrating a pixel according to an exemplary embodiment of the present invention.
6 is a rear view of a second display panel according to an embodiment of the present invention.
7 is a front view of a rear cover according to an example of the present invention.
8 is an exemplary view of a moving member according to an embodiment of the present invention.
9 is an exemplary view of a moving member according to another example of the present invention.
10 is a II′ cross-sectional view of FIG. 1 .
11 is a side view illustrating a case in which a first image and a second image are displayed in a dual screen display device according to an embodiment of the present invention.
12 is a side view illustrating a case in which a dual screen display device according to another example of the present invention displays a first image and a second image.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to examples described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the examples disclosed below, but will be implemented in a variety of different forms, and only examples of the present invention make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims.

Since the shape, size, ratio, angle, number, etc. disclosed in the drawings for explaining an example of the present invention are exemplary, the present invention is not limited to the illustrated details. Like reference numbers designate like elements throughout the specification. In addition, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

When 'includes', 'has', 'consists', etc. mentioned in this specification is used, other parts may be added unless 'only' is used. In the case where a component is expressed in the singular, the case including the plural is included unless otherwise explicitly stated.

In interpreting the components, even if there is no separate explicit description, it is interpreted as including the error range.

In the case of a description of a positional relationship, for example, 'on top of', 'on top of', 'at the bottom of', 'next to', etc. Or, unless 'directly' is used, one or more other parts may be located between the two parts.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal precedence relationship is described in terms of 'after', 'following', 'next to', 'before', etc. It can also include non-continuous cases unless is used.

Although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, the first component mentioned below may also be the second component within the technical spirit of the present invention.

"First horizontal axis direction", "second horizontal axis direction", and "vertical axis direction" should not be interpreted only as a geometric relationship in which the relationship between each other is vertical, and the range in which the configuration of the present invention can function functionally It can mean having a wider direction than within.

The term “at least one” should be understood to include all possible combinations from one or more related items. For example, "at least one of the first item, the second item, and the third item" means not only the first item, the second item, or the third item, respectively, but also two of the first item, the second item, and the third item. It may mean a combination of all items that can be presented from one or more.

Each feature of the various examples of the present invention can be partially or entirely combined or combined with each other, technically various interlocking and driving is possible, and each example can be implemented independently of each other or can be implemented together in a related relationship. .

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

1 is a perspective view illustrating a case in which a dual screen display device according to an embodiment of the present invention displays only a first image DA1. 2 is a perspective view illustrating a case in which a second image DA2 is displayed above a first image DA1 in a dual screen display device according to an embodiment of the present invention. 3 is a perspective view illustrating a case in which a second image DA2 is displayed on the right side of a first image DA1 in a dual screen display device according to an embodiment of the present invention.

1 to 3 , a dual screen display device according to an example of the present invention includes a first display panel 100, a second display panel 200, and a back cover 300. .

A dual screen display device according to an example of the present invention is a display device capable of self-emission and is characterized by a structure without a backlight. Accordingly, the display device according to an example of the present invention does not include a separate backlight for supplying light to the first display panel 100 or the second display panel 200, and thus the first display panel 100 and the second display panel 200 Two display panels 200 may be included in one display device, and it is possible to overlap the first display panel 100 and the second display panel 200 .

The first display panel 100 is disposed on the front side of the dual screen display device. The first display panel 100 displays a first image DA1. The first image DA1 is an image that is always visually recognized by the user. The first image DA1 always displays an image when the dual screen display device is turned on.

The second display panel 200 is disposed on the rear surface of the first display panel 100 . Preferably, the second display panel 200 is disposed adjacent to the first display panel 100 so that the thickness of the dual screen display device is within a range in which the front surface of the second display panel 200 is not damaged by friction. to minimize The second display panel 200 displays the second image DA2. The second image DA2 is an image visually recognized by the user when driving in the dual screen mode as needed. The second image DA2 is displayed when the second display panel 200 is exposed to the outside of the first display panel 100 and can be recognized by the user.

The rear cover 300 is disposed on the rear surface of the second display panel 200 . The rear cover 300 protects the rear surface of the dual screen display device from external impact. Also, the rear cover 300 allows the second display panel 200 to move upward, left, or right of the first display panel 100 . To this end, the rear cover 300 includes a rear cover rail 310 and a rear cover rail stopper 320 .

The rear cover rail 310 is disposed on the front side of the rear cover 300 . The rear cover rail 310 moves the second display panel 200 upward, left, or right. Accordingly, when the rear cover rail 310 is driven in the single screen mode, the second display panel 200 is disposed on the rear surface of the first display panel 100 so that the second image DA2 is not exposed to the outside. , In the case of driving in the dual screen mode, the second image DA2 is exposed to the outside.

The rear cover rail stopper 320 is disposed at the upper, left, and right ends of the rear cover rail 310 . The rear cover rail stopper 320 has greater frictional force than the rear cover rail 310, has an inclined surface, or has a protrusion. The rear cover rail stopper 320 prevents the second display panel 200 from leaving the dual screen display device by the rear cover rail 310 .

As described above, FIG. 1 shows a case of driving in a single screen mode, and the second display panel 200 is disposed on the rear surface of the first display panel 100 . Accordingly, the second image DA2 is not exposed to the outside.

On the other hand, the case of FIG. 2 shows a case of driving in a dual screen mode, and the second display panel 200 moves above the first display panel 100 . Accordingly, the second image DA2 is exposed to the outside from above the first image DA1.

3 shows a case of driving in the dual screen mode, and the second display panel 200 moves to the right of the first display panel 100 . Accordingly, the second image DA2 is exposed to the outside from the right side of the first image DA1. Although not shown in the drawings, the second image DA2 may be exposed to the outside from the left side of the first image DA1 according to the same principle.

In this way, the second display panel 200 can be driven in the dual screen mode by moving to the upper, left, or right side of the first display panel 100 to expose the second image DA2 to the outside. Accordingly, the dual screen mode can be implemented without external equipment having a display panel such as a separate monitor. In addition, cables for connecting to external monitors are not required to operate in dual screen mode. In addition, since the first image DA1 and the second image DA2 are adjacent to each other, space consumption can be reduced compared to the case of driving in the conventional dual screen mode.

4 is a block diagram of a first display panel unit according to an embodiment of the present invention. 5 is a circuit diagram illustrating a pixel according to an exemplary embodiment of the present invention.

Referring to FIGS. 4 and 5 , the first display panel unit according to an example of the present invention includes a first display panel 100, a gate driver 110, a data driver 120, a source drive integrated circuit (IC), SD-IC) 121, a timing controller (T-CON) 130, a scan driver (not shown), and a sensing driver (not shown). Although only the first display panel portion including the first display panel 100 has been described in FIGS. 4 and 5 , only the positions of the first display panel 100 and the second display panel 200 are different, and the image Since the principle of implementing the image and the components for implementing the image are the same, a description of the second display panel portion including the second display panel 200 will be omitted.

The first display panel 100 includes a display area and a non-display area provided around the display area. The display area is an area where the pixels P are provided to display an image. Gate lines GL1 to GLp (where p is a positive integer greater than or equal to 2), data lines DL1 to DLq (where q is a positive integer greater than or equal to 2), and sensing lines SL1 to SLq are provided in the display panel 100 . do. The data lines DL1 to DLq and the sensing lines SL1 to SLq may cross the gate lines GL1 to GLp. The data lines DL1 to DLq and the sensing lines SL1 to SLq may be parallel to each other. The display panel 100 may include a lower substrate on which the pixels P are provided and an upper substrate performing a sealing function.

Each of the pixels P may be connected to one of the gate lines GL1 to GLp, one of the data lines DL1 to DLq, and one of the sensing lines SE1 to SEm. Since the display device according to an example of the present invention can be applied to a display device having pixels P capable of self-emission without using a backlight, the following describes an example of the present invention while explaining the structure of the pixel P. A description will be made on the assumption that the display device according to the present invention is an organic light emitting display device.

Each of the pixels P may include an organic light emitting diode (OLED) and a pixel driver PD supplying current to the organic light emitting diode (OLED), as shown in FIG. 5 . In FIG. 5 , for convenience of explanation, the jth data line DLj (j is a positive integer satisfying 1≤j≤q), the jth sensing line SLj, and the kth (k represents 1≤k≤p). Satisfied positive integer) scan line Sk, and only the pixels P connected to the k th sensing signal line SSk are shown.

Referring to FIG. 5 , the pixel P includes an organic light emitting diode (OLED) and a pixel driver (PD) supplying current to the organic light emitting diode (OLED) and the j th sensing line (SLj).

The organic light emitting diode (OLED) emits light according to the current supplied through the driving transistor (DT). The anode electrode of the organic light emitting diode OLED may be connected to the source electrode of the driving transistor DT, and the cathode electrode may be connected to the low potential voltage line ELVSSL to which a low potential voltage lower than the high potential voltage is supplied.

An organic light emitting diode (OLED) may include an anode electrode, a hole transporting layer, an organic light emitting layer, an electron transporting layer, and a cathode electrode. there is. In the organic light emitting diode (OLED), when voltage is applied to the anode electrode and the cathode electrode, holes and electrons are moved to the organic light emitting layer through the hole transport layer and the electron transport layer, respectively, and holes and electrons combine with each other in the organic light emitting layer to emit light.

The pixel driver PD includes a driving transistor DT, a first transistor ST1 controlled by a scan signal of a scan line Sk, and a second transistor ST1 controlled by a sensing signal of a sensing signal line SSk. A transistor ST2 and a capacitor C may be included. The pixel driver PD receives the data voltage VDATA of the data line DLj connected to the pixel P when a scan signal is supplied from the scan line Sk connected to the pixel P in display mode, The current of the driving transistor DT according to the data voltage VDATA is supplied to the organic light emitting diode OLED. The pixel driver PD receives the sensing voltage of the data line DLj connected to the pixel P when a scan signal is supplied from the scan line Sk connected to the pixel P in the sensing mode, and the driving transistor ( The current of DT is passed through the sensing line SLj connected to the pixel P.

The driving transistor DT is provided between the high potential voltage line ELVDDL and the organic light emitting diode OLED. The driving transistor DT adjusts the current flowing from the high potential voltage line ELVDDL to the organic light emitting diode OLED according to the voltage difference between the gate electrode and the source electrode. The gate electrode of the driving transistor DT is connected to the first electrode of the first transistor ST1, the source electrode is connected to the anode electrode of the organic light emitting diode OLED, and the drain electrode has a high potential to which a high potential voltage is supplied. It may be connected to the voltage line ELVDDL.

The first transistor ST1 is turned on by the k th scan signal of the k th scan line Sk to supply the voltage of the j th data line DLj to the gate electrode of the driving transistor DT. The gate electrode of the first transistor T1 is connected to the kth scan line Sk, the first electrode is connected to the gate electrode of the driving transistor DT, and the second electrode is connected to the jth data line DLj. It can be. The first transistor ST1 may be collectively referred to as a scan transistor.

The second transistor ST2 is turned on by the k th sensing signal of the k th sensing signal line SSk to connect the j th sensing line SLj to the source electrode of the driving transistor DT. The gate electrode of the second transistor ST2 is connected to the kth sensing signal line SSk, the first electrode is connected to the jth sensing line SLj, and the second electrode is connected to the source electrode of the driving transistor DT. can be connected. The second transistor ST2 may be collectively referred to as a sensing transistor.

The capacitor C is provided between the gate electrode and the source electrode of the driving transistor DT. The capacitor C stores a difference voltage between the gate voltage and the source voltage of the driving transistor DT.

In FIG. 5 , the driving transistor DT and the first and second transistors ST1 and ST2 have been mainly described as being formed of N-type MOSFETs (Metal Oxide Semiconductor Field Effect Transistors), but it should be noted that they are not limited thereto. The driving transistor DT and the first and second transistors ST1 and ST2 may be formed of a P-type MOSFET. Also, the first electrode may be a source electrode and the second electrode may be a drain electrode, but it should be noted that they are not limited thereto. That is, the first electrode may be the drain electrode and the second electrode may be the source electrode.

In the display mode, when a scan signal is supplied to the kth scan line Sk, the data voltage VDATA of the jth data line DLj is supplied to the gate electrode of the driving transistor DT, and the kth sensing signal line ( When a sensing signal is supplied to SSk, the initialization voltage of the jth sensing line SEj is supplied to the source electrode of the driving transistor DT. Due to this, the current of the driving transistor DT flowing according to the voltage difference between the voltage of the gate electrode and the voltage of the source electrode of the driving transistor DT in the display mode is supplied to the organic light emitting diode OLED, and the organic light emitting diode OLED ) emits light according to the current of the driving transistor DT. At this time, since the data voltage VDATA is a voltage obtained by compensating for the threshold voltage and electron mobility of the driving transistor DT, the current of the driving transistor DT does not depend on the threshold voltage and electron mobility of the driving transistor DT. .

In the sensing mode, when a scan signal is supplied to the kth scan line Sk, the sensing voltage of the jth data line is supplied to the gate electrode of the driving transistor DT, and the sensing signal is supplied to the kth sensing signal line SSk. When supplied, the initialization voltage of the j th sensing line SLj is supplied to the source electrode of the driving transistor DT. In addition, when a sensing signal is supplied to the kth sensing signal line SSk, the second transistor ST2 is turned on and driven according to a voltage difference between the voltage of the gate electrode and the voltage of the source electrode of the driving transistor DT. The current of the transistor DT is allowed to flow through the jth sensing line SLj.

The gate driver 120 receives the gate control signal GCS from the timing controller 130, generates gate signals according to the gate control signal GCS, and supplies them to the gate lines GL1 to GLp.

The data driver 120 may include a plurality of source drive ICs 121 as shown in FIG. 3 . Each of the source drive ICs 121 may be mounted on each of the flexible films 150 . Each of the flexible films 150 may be provided as a chip on film (COF). The chip-on-film may include a base film such as polyimide and a plurality of conductive lead wires provided on the base film. Each of the flexible films 150 may be bent or bent. Each of the flexible films 150 may be attached to the lower substrate 101 of the display panel 100 and the control printed circuit board (C-PCB) 140 . In particular, each of the flexible films 150 may be attached on the lower substrate 101 in a Tape Automated Bonding (TAB) method using an anisotropic conductive film (ACF), and thereby the source drive IC 121 ) may be connected to the data lines DL1 to DLq.

The control printed circuit board 140 may be attached to the flexible films 150 . The control printed circuit board 140 may mount the timing controller 130 as shown in FIG. 3, and on the control printed circuit board 140, the timing controller 130 and the source drive IC mounted on the associative film 150 ( 121) are disposed.

The timing controller 130 receives digital video data DATA and a timing signal TS from an external system board. Timing signals and digital video data DATA are input to the input terminal of the timing controller 130 according to a set protocol. The timing signal TS includes a vertical sync signal (Vsync), a horizontal sync signal (Hsync), a data enable signal (DE), and a dot clock (DCLK). include The timing controller 130 receives sensing data SEN from the data driver 120 . The timing controller 130 compensates the digital video data DATA based on the sensing data SEN.

The timing controller 130 generates timing control signals for controlling operation timings of the gate driver 110, the data driver 120, the scan driver, and the sensing driver. The timing control signals include a gate timing control signal (GCS) for controlling the operation timing of the gate driver 110, a data timing control signal (DCS) for controlling the operation timing of the data driver 120, and an operation timing of the scan driver. It includes a scan timing control signal for controlling and a sensing timing control signal for controlling the operation timing of the sensing driver.

The timing controller 130 operates the data driver 120, the scan driver, and the sensing driver in one of a display mode and a sensing mode according to a mode signal. The display mode is a mode in which the pixels P of the display panel 100 display an image, and the sensing mode is a mode in which a current of the driving transistor DT of each of the pixels P of the display panel 100 is sensed. When the waveform of the scan signal and the sensing signal supplied to each of the pixels P in the display mode and the sensing mode are changed, the data timing control signal DCS, the scan timing control signal and the The sensing timing control signal may also be changed. Accordingly, the timing controller 130 generates a data timing control signal (DCS), a scan timing control signal, and a sensing timing control signal corresponding to a corresponding mode depending on which mode is selected from among the display mode and the sensing mode.

The timing controller 130 outputs the gate timing control signal GCS to the gate driver 110 . The timing controller 130 outputs the compensated digital video data and the data timing control signal DCS to the data driver 120 . The timing controller 130 outputs the scan timing control signal to the scan driver. The timing controller 130 outputs the sensing timing control signal to the sensing driver.

In addition, the timing controller 130 generates a mode signal for driving the data driver 120, the scan driver, and the sensing driver according to which mode among the display mode and the sensing mode is to be driven. The timing controller 130 operates the data driver 120, the scan driver, and the sensing driver in one of a display mode and a sensing mode according to a mode signal.

6 is a rear view of the second display panel 200 according to an example of the present invention. The second display panel 200 according to an example of the present invention includes a display panel rail 210 and a display panel rail stopper 220 .

The display panel rail 210 is disposed on the rear surface of the second display panel 200 . The display panel rails 210 are disposed to cross each other in the X-axis direction and the Y-axis direction. The X-axis direction may be defined as a horizontal direction or a gate line direction, and the Y-axis direction may be defined as a mutual direction or a data line direction. As described above, since the gate line and the data line are disposed while crossing each other vertically, the display panel rail 210 is disposed while vertically crossing each other. Preferably, the display panel rails 210 extend downward, left, and right from the center of the rear surface of the second display panel 200 . In this case, the display panel rail 210 is disposed in a 'TT' shape.

The display panel rail 210 is a path through which the second display panel 200 can move while sliding on the rear cover 300 . The second display panel 200 may move only in the direction in which the display panel rail 210 is formed. For example, when the display panel rails 210 are disposed in a 'TT' shape, the second display panel 200 may move while sliding upward, left, and right on the rear cover 300 . To this end, the display panel rail 210 may be formed by digging a groove on the rear surface of the second display panel 200, may have a concave-convex structure that engages with the rear cover 300, or may be formed in the form of a rail on which wheels can go. .

The display panel rail stoppers 220 are disposed at lower, left, and right ends of the display panel rail 210 . The display panel rail stopper 220 has greater frictional force than the display panel rail 210 , has an inclined surface, or has a protrusion. The display panel rail stopper 220 prevents the second display panel 200 from leaving the dual screen display device by the display panel rail 210 .

In the dual screen display device according to an example of the present invention, a display panel rail 210 and a display panel rail stopper 220 are formed on the rear surface of the second display panel 200 . Accordingly, the second display panel 200 can be moved along a path determined by the display panel rail 210 without leaving the rear cover 300 .

7 is a front view of a rear cover 300 according to an example of the present invention. As described above, the rear cover 300 according to an example of the present invention includes the rear cover rail 310 and the rear cover rail stopper 320 . Among them, the description of the rear cover rail stopper 320 is the same as that described in connection with FIGS. 1 to 3, so a description thereof will be omitted. In addition, the rear cover 300 according to an example of the present invention includes a moving member 330.

The rear cover rail 310 is a path through which the second display panel 200 can move while sliding on the rear cover 300 . The second display panel 200 may move only in the direction in which the rear cover rail 310 is formed. For example, when the rear cover rail 310 extends from the center of the front side of the rear cover 300 to the upper, left, and right sides and is disposed in a 'ㅗ' shape, the second display panel 200 is the rear cover. It can move while sliding up, left, and right on the 300. To this end, the rear cover rail 310 may be formed by digging a groove in the front of the rear cover 300, or may have a concave-convex structure that engages with the second display panel 200, or may be formed in the form of a rail on which wheels can go. .

Preferably, the rear cover rail 310 is disposed in a shape corresponding to the display panel rail 210 . That is, as shown in FIGS. 6 and 7 , when the display panel rail 210 extends downward, left, and right from the center of the rear surface of the second display panel 200, the rear cover rail 310 is also the rear cover. It extends from the center of the front of 300 upward, left, and right.

When the display panel rail 210 and the rear cover rail 310 are disposed in a corresponding manner, a force sliding the display panel rail 210 and the rear cover rail 310 when the second display panel 200 is moved it is distributed Also, depending on the structure of the rail, some rails are designed to be interlocked on both sides. In order to apply this rail structure, the display panel rail 210 and the rear cover rail 310 must be in corresponding positions so that the second display panel 200 ) can move on the rear cover 300. That is, when the display panel rail 210 and the rear cover rail 310 are disposed in a corresponding shape, the second display panel 200 can be moved more stably on the rear cover 300 .

The moving member 330 is disposed on the front side of the rear cover 300 . The moving member 330 moves along the display panel rail 210 and the rear cover rail 310 . 6 and 7 , when the display panel rail 210 and the rear cover rail 310 are arranged in a cross shape intersecting at the center, the movable member 330 also moves upward, downward, left, and right at the center. As a result, the display panel rail 210 and the rear cover rail 310 may be moved along a path formed thereon.

The moving member 330 further stabilizes the movement of the second display panel 220 along the display panel rail 210 and the rear cover rail 310 on the rear cover 300 . When the movement path of the second display panel 200 is guided only by the display panel rail 210 and the rear cover rail 310 without the moving member 330, separation between the second display panel 200 and the rear cover 300 or slippage may occur. On the other hand, while the movable member 330 moves along the path between the display panel rail 210 and the rear cover rail 310, separation or slipping between the second display panel 200 and the rear cover 300 may be prevented.

8 is an exemplary view of a moving member 330 according to an example of the present invention. The moving member 330 according to an example of the present invention includes a connection part 331, a head part 332, and a tail part 333.

The connection part 331 is disposed between the head part 332 and the tail part 333. The connection part 331 connects the display panel rail 210 and the rear cover rail 310 . Accordingly, the connection unit 331 may connect the second display panel 200 and the rear cover 300 .

The head 332 contacts the display panel rail 210 . The head part 332 is engaged with the display panel rail 210 and moves along the path on which the display panel rail 210 is formed. The head portion 332 has a width corresponding to that of the display panel rail 210 . Accordingly, the head portion 332 may be engaged with the display panel rail 210 or may be coupled with irregularities of the display panel rail 210 . In addition, the head 332 is formed with wheels to be able to move on the rail, or is formed to be easily moved due to low frictional force. Accordingly, the head part 332 can move while sliding on the display panel rail 210 .

The tail portion 333 contacts the rear cover rail 310 . The tail part 333 engages with the rear cover rail 310 and moves along the path on which the rear cover rail 310 is formed. The tail portion 333 has a width corresponding to that of the rear cover rail 310 . Accordingly, the tail portion 333 may be engaged with the rear cover rail 310 or may be combined with irregularities of the rear cover rail 310 . In addition, the tail portion 333 is formed with wheels to be able to move on the rail, or is formed to be easily moved due to low frictional force. Accordingly, the tail portion 333 can move while sliding on the rear cover rail 310 .

In the above description, the case in which the head portion 332 contacts the display panel rail 210 and the tail portion 333 contacts the rear cover rail 310 has been exemplified, but is not limited thereto, and the head portion 332 is in contact with the rear cover rail 310. It may contact the rear cover rail 310 and the tail portion 333 may contact the display panel rail 210 .

At this time, the moving member 330 may be formed of a material having elasticity. In particular, it is preferable that the connecting portion 331 is an elastic body that can be lengthened or shortened by a predetermined length. When the connecting portion 331 can be lengthened or shortened by a predetermined length, the distance between the second display panel 200 and the rear cover 300 can also be lengthened or shortened by a predetermined length, so that the second display The panel 200 can be moved flexibly and can be slid more naturally. In addition, when the head portion 332 and the tail portion 333 have elasticity, they may contact the display panel rail 210 and the rear cover rail 310 and then engage with the rail more easily.

9 is an exemplary view of a moving member 340 according to another example of the present invention. The moving member 340 according to another example of the present invention includes an elastic member 341, a first ball 342 and a second ball 343.

The elastic member 341 connects the first ball 342 and the second ball 343. The elastic member 341 may adjust the distance between the first ball 342 and the second ball 343 . The elastic member 341 reduces the distance between the first ball 342 and the second ball 343 when moving the moving member 340 on the display panel rail 210 and the rear cover rail 310 . Accordingly, while the first ball 342 and the second ball 343 maintain contact on the display panel rail 210 and the rear cover rail 310, the first ball 342 and the second ball ( 343) so that it can move while sliding without applying pressure.

When the elastic member 341 is to fix the first ball 342 and the second ball 343 of the moving member 340 to specific positions on the display panel rail 210 and the rear cover rail 310, the first ball Increase the distance between (342) and the second ball (343). Accordingly, the elastic member 341 brings the first ball 342 and the second ball 343 into close contact with the display panel rail 210 and the rear cover rail 310, so that the display panel rail 210 and the rear cover rail Pressure may be applied so as not to move at a specific position on 310. The elastic member 341 may be formed of a spring or an elastic body that can replace it.

The first ball 342 contacts the display panel rail 210 . The first ball 342 is engaged with the display panel rail 210 and moves along the path on which the display panel rail 210 is formed. The first ball 342 has a size corresponding to the width of the display panel rail 210 . Accordingly, the first ball 342 may engage with the display panel rail 210 or may engage with the unevenness of the display panel rail 210 . In addition, the first ball 342 is formed with wheels to be able to move on the rail, or is formed to be easily moved due to low frictional force. Accordingly, the first ball 342 can move while sliding on the display panel rail 210 .

The second ball 343 contacts the rear cover rail 310 . The second ball 343 engages with the rear cover rail 310 and moves along the path on which the rear cover rail 310 is formed. The second ball 343 has a size corresponding to the width of the rear cover rail 310 . Accordingly, the second ball 343 may be engaged with the rear cover rail 310 or may be combined with irregularities of the rear cover rail 310 . In addition, the second ball 343 is formed with wheels to be able to move on the rail, or is formed to be easily moved due to low frictional force. Accordingly, the second ball 343 can move while sliding on the rear cover rail 310 .

In the above description, the case where the first ball 342 contacts the display panel rail 210 and the second ball 343 contacts the rear cover rail 310 has been exemplified, but is not limited thereto, and the first ball ( 342 may contact the rear cover rail 310 and the second ball 333 may contact the display panel rail 210 .

The moving member 340 according to another example of the present invention may adjust the distance between the first ball 342 and the second ball 343 using the elastic member 341 . When the distance between the first ball 342 and the second ball 343 can be adjusted, the distance between the second display panel 200 and the rear cover 300 can also be adjusted, so that the second display panel 200 can be adjusted. It can move flexibly and slide more naturally. In addition, when the first ball 342 and the second ball 343 need to be fixed without moving, the first ball 342 and the second ball 343 are attached to the display panel rail by extending the elastic member 341. 210 and the rear cover rail 310 may be closely attached.

10 is a II′ cross-sectional view of FIG. 1 . When only the first image DA1 is displayed, as described above with reference to FIG. 1 , the first display panel 100 , the second display panel 200 , and the rear cover 300 are overlapped. In FIG. 10 , the first display panel 100 is not shown in order to focus on the description of the second display panel 200 and the rear cover 300 .

The display panel rail 210 is formed on the rear surface of the second display panel 200 , and the rear cover rail 310 is formed on the front surface of the rear cover 300 . In addition, display panel rail stoppers 220 are formed at both ends of the display panel rail 210 , and rear cover rail stoppers 320 are formed at both ends of the rear cover rail 310 . In addition, a moving member 330 is provided at a central portion where the display panel rail 210 and the rear cover rail 310 intersect. The moving member 330 is in contact with the display panel rail 210 and the rear cover rail 310 .

At this time, since the second display panel 200 should not be exposed to the outside when driven in the single screen mode, the moving member 330 is located at the center where the display panel rail 210 and the rear cover rail 310 intersect. You need to stay in place and not move. Accordingly, a fixing member fixing the movable member 330 may be provided at a central portion where the display panel rail 210 and the rear cover rail 310 intersect.

As an example of the fixing member, the surface of the central portion where the display panel rail 210 and the rear cover rail 310 intersect is formed of a material with high frictional force or fine irregularities are formed to prevent easy sliding of the movable member in the central portion. can do.

As another example of the fixing member, a groove capable of accommodating the movable member 330 is formed in the central portion of the rear cover rail 310 or the central portion where the display panel rail 210 and the rear cover rail 310 intersect is concave. It can be formed so that the movable member 330 is located in the central part as much as possible.

As another example of the fixing member, when the moving member 330 is made of a metal material, a magnet may be disposed at a central portion where the display panel rail 210 and the rear cover rail 310 intersect as a fixing means.

By fixing the movable member 330 to the central portion where the display panel rail 210 and the rear cover rail 310 intersect the fixing member according to various examples, the movable member 330 moves in the single screen mode to display the second display. The panel 200 may not be exposed to the outside.

11 is a side view illustrating a case in which a dual screen display device according to an example of the present invention displays a first image DA1 and a second image DA2, and FIG. 12 is a dual screen display according to another example of the present invention. It is a side view showing a case where the device displays the first image DA1 and the second image DA2.

When only the first image DA1 is displayed, as described above with reference to FIGS. 2 and 3 , the first display panel 100 and the second display panel ( 200) do not overlap. To this end, the second display panel 200 moves while sliding on the rear cover 300 and is exposed to the outside by leaving the rear cover 300 . In FIGS. 11 and 12 , the first display panel 100 is not illustrated in order to focus on the description of the second display panel 200 and the rear cover 300 .

The display panel rail 210 is formed on the rear surface of the second display panel 200 , and the rear cover rail 310 is formed on the front surface of the rear cover 300 . In addition, display panel rail stoppers 220 are formed at both ends of the display panel rail 210 , and rear cover rail stoppers 320 are formed at both ends of the rear cover rail 310 . In addition, in FIG. 11, the moving member 330 according to an example of the present invention is provided at the center where the display panel rail 210 and the rear cover rail 310 intersect, and in FIG. 12, the display panel rail 210 and the rear cover rail 310 intersect. A moving member 340 according to another example of the present invention is provided at the center where the cover rails 310 intersect. The moving members 330 and 340 are in contact with the display panel rail 210 and the rear cover rail 310 .

The second display panel 200 moves while sliding on the rear cover 300 using the display panel rail 210 and the rear cover rail 310, and is exposed to the outside from the top of the rear cover 300. The moving members 330 and 340 slide the display panel rail 210 and the rear cover rail 310 to move to one end of the display panel rail 210 and the rear cover rail 310 . The moving members 330 and 340 contact the display panel rail stopper 220 and the rear cover rail stopper 320 .

At this time, the display panel rail stopper 220 and the rear cover rail stopper 320 prevent the moving members 330 and 340 from leaving the rear cover 300 . To this end, the lengths of the moving members 330 and 340 are longer than the distance between the display panel rail stopper 220 and the rear cover rail stopper 320 . Accordingly, the display panel rail stopper 220 and the rear cover rail stopper 320 may serve as thresholds to prevent the moving members 330 and 340 from leaving the rear cover 300 . In addition, when the separation of the moving members 330 and 340 is prevented, the problem of separation of the second display panel 200 from the rear cover 330 can also be prevented.

A dual screen display device according to an example of the present invention may implement a dual screen mode by using a second display panel that is exposed to the outside while sliding. Accordingly, in one embodiment of the present invention, a dual screen mode can be implemented using one display device without using a separate external monitor. In addition, since there is no need to use a cable to connect to an external monitor, the dual screen mode can be implemented more conveniently.

Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and may be variously modified and implemented without departing from the technical spirit of the present invention. . Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. The protection scope of the present invention should be construed according to the claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: first display panel 110: gate driver
120: data driver 130: timing controller
200: second display panel 210: display panel rail
220: display panel rail stopper 300: rear cover
310: rear cover rail 320: rear cover rail stopper
330, 340: Moving member DA1, DA2: 1st, 2nd image
P: pixel

Claims (8)

a first display panel displaying a first image;
a second display panel disposed behind the first display panel to display a second image; and
a rear cover disposed on a rear surface of the second display panel;
A rear cover rail for moving the second display panel is disposed on the front side of the rear cover, and rear cover rail stoppers are disposed at upper, left, and right ends of the rear cover rail,
the second display panel is movably disposed between the first display panel and the rear cover disposed to overlap each other through the rear cover rail;
When driving in single screen mode, the first display panel, the second display panel, and the rear cover are disposed to overlap each other,
In the dual screen mode, only the second display panel is moved above, left, or right of the first display panel to expose the second image to the outside. According to claim 1,
Display panel rails extending downward, left, and right from the center of the rear surface of the second display panel are disposed on the rear surface of the second display panel, and display panel rails are disposed at the lower, left, and right ends of the display panel rails. Dual screen display unit with stopper placed. According to claim 2,
The rear cover rail is disposed in a form corresponding to the display panel rail by extending upward, left, and right from the center of the front surface of the rear cover. According to claim 3,
a moving member disposed between the display panel rail and the rear cover rail;
According to the movement of the second display panel, the moving member in contact with the display panel rail stopper moves along the display panel rail and the rear cover rail. According to claim 4,
The moving member moves while sliding the display panel rail and the rear cover rail using a head and a tail having widths corresponding to those of the display panel rail and the rear cover rail, and is a dual screen material having elasticity. display device. According to claim 4,
The moving member moves while sliding the display panel rail and the rear cover rail using a first ball and a second ball having a width corresponding to the width of the display panel rail and the rear cover rail, and the first ball and the second ball are connected by an elastic member. According to claim 4,
A dual screen display device comprising a fixing member for fixing the moving member at a central portion where the display panel rail and the rear cover rail intersect. According to claim 4,
The length of the moving member is longer than the distance between the display panel rail stopper and the rear cover rail stopper.

Images