Display device

Abstract

The present application relates to a display device. The display device includes: a display panel that displays an image according to an image display mode and includes a surface on which the image is displayed, wherein the image display mode includes a first display mode and a second display mode; a rollable lens that includes a first lens array and a second lens array spaced apart from the first lens array; and a roller that is disposed inside the rollable lens. Here, in the first display mode, the roller rotates the rollable lens so that the first lens array is disposed on the surface of the display panel, and in the second display mode, the roller rotates the rollable lens so that the second lens array is disposed on the surface of the display panel.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Korean Patent Application No. 10-2019-0140480, filed on November 5, 2019, and all rights arising therefrom, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] Exemplary embodiments of the present invention herein relate to a display device capable of displaying a three-dimensional image. Background Art

[0004] Three-dimensional ("3D") display technology has been applied to various image display fields such as movies, televisions, and mobile phones. 3D displays have the ultimate goal of allowing people to experience the same 3D effect as in a real-world environment. To this end, technologies including stereo methods and multi-view methods have been studied. Among these technologies, the light field method can reproduce more accurate 3D spatial information.

[0005] Light generated from the display panel may pass through the lens to provide a light field. In recent years, research has been conducted to change the arrangement method (eg, tilt) of the lens in order to improve the display quality of a 3D image.

[0006] In recent years, mobile devices including display devices, such as mobile phones, personal digital assistants (PDAs), navigation units for vehicles, tablet computers, and game consoles, have been widely used. For example, when the screen direction is changed from a horizontal (lateral) direction to a vertical (vertical) direction or from a vertical direction to a horizontal direction, the mobile device can display an image suitable for the screen direction.

[0007] Furthermore, the demand for viewing 3D images in mobile devices has recently increased, and display devices are expected to be able to provide two-dimensional ("2D") images even when the screen direction is changed. Summary of the invention

[0008] Exemplary embodiments of the present invention provide a display device capable of displaying a three-dimensional ("3D") image when a screen direction of the display device is changed.

[0009] An exemplary embodiment of the present invention provides a display device, comprising: a display panel that displays an image according to an image display mode and includes a surface on which the image is displayed, wherein the image display mode includes a first display mode and a second display mode; a rollable lens that includes a first lens array and a second lens array spaced apart from the first lens array; and a roller that is disposed inside the rollable lens. Here, in the first display mode, the roller rotates the rollable lens so that the first lens array is disposed on the surface of the display panel, and in the second display mode, the roller rotates the rollable lens so that the second lens array is disposed on the surface of the display panel.

[0010] In an exemplary embodiment, in the first display mode, the image may be output in the vertical direction of the display panel, and in the second display mode, the image may be output in the horizontal direction of the display panel.

[0011] In an exemplary embodiment, the first lens array may include a plurality of first lens units arranged in a first direction, and the second lens array may include a plurality of second lens units arranged in a second direction crossing the first direction.

[0012] In an exemplary embodiment, the plurality of first lens units may have a shape inclined at a first inclination angle relative to a virtual first reference line parallel to the second direction, and the plurality of second lens units may have a shape inclined at a second inclination angle relative to a virtual second reference line parallel to the first direction.

[0013] In exemplary embodiments, each of the plurality of first lens units and the plurality of second lens units may include a cylindrical lens.

[0014] In an exemplary embodiment, the first inclination angle may be different from the second inclination angle.

[0015] In an exemplary embodiment, the roller may include a first roller and a second roller spaced apart from each other in the first direction or the second direction.

[0016] In an exemplary embodiment, when the image display mode of the display panel is switched from the second display mode to the first display mode, the first roller and the second roller may move the rollable lens in a first rotation direction so that the first lens array is disposed on the surface of the display panel, and when the image display mode of the display panel is switched from the first display mode to the second display mode, the first roller and the second roller may move the rollable lens in a second rotation direction different from the first rotation direction so that the second lens array is disposed on the surface of the display panel.

[0017] In an exemplary embodiment, the first roller and the second roller may be disposed to correspond to long sides of the display panel, respectively.

[0018] In an exemplary embodiment, the first roller and the second roller may be disposed to correspond to short sides of the display panel, respectively.

[0019] In an exemplary embodiment, a size of each of the first lens array and the second lens array may be greater than or equal to a size of the display panel.

[0020] In an exemplary embodiment, the display device may further include a window module corresponding to a surface of the display panel and disposed on the rollable lens.

[0021] In an exemplary embodiment, the display device may further include a housing accommodating the rollable lens, the display panel, the first roller, and the second roller.

[0022] In an exemplary embodiment of the present invention, a display device includes a display panel that displays an image, a housing that accommodates the display panel, a first lens panel attached to a first side of the housing, and a second lens panel attached to a second side of the housing. Here, the first lens panel includes a first lens array including a plurality of first lens units arranged in a first direction, and the second lens panel includes a second lens array including a plurality of second lens units arranged in a second direction.

[0023] In an exemplary embodiment, the display device may further include a first connection portion connecting the housing with the first lens panel, and a second connection portion connecting the housing with the second lens panel.

[0024] In an exemplary embodiment, each of the first connection portion and the second connection portion may include a flexible material.

[0025] In an exemplary embodiment, the plurality of first lens units may have a shape inclined at a first inclination angle relative to a virtual first reference line parallel to the second direction, and the plurality of second lens units may have a shape inclined at a second inclination angle relative to a virtual second reference line parallel to the first direction.

[0026] In an exemplary embodiment, the first inclination angle may be different from the second inclination angle.

[0027] In exemplary embodiments, each of the plurality of first lens units and the plurality of second lens units may include a cylindrical lens.

[0028] In an exemplary embodiment, the display device may further include a window module connected to the third side of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are included to provide a further understanding of the present invention and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate exemplary embodiments of the present invention and together with the description serve to explain the principles of the present invention. In the drawings:

[0030] Figure 1 is a perspective view showing an exemplary embodiment of a display device according to the present invention;

[0031] Figure 2 It is shown Figure 1 A block diagram of a display device in;

[0032] Figure 3A is a view exemplarily showing a display device operating in a first display mode;

[0033] Figure 3B is a schematic exploded perspective view showing a first lens array and a display panel of a display device operating in a first display mode;

[0034] Figure 4A is a view exemplarily showing a display device operating in a second display mode;

[0035] Figure 4B is a schematic exploded perspective view showing a second lens array and a display panel of a display device operating in a second display mode;

[0036] Figure 5 and Figure 6 It is along Figure 1 A cross-sectional view of the display device taken along line II' in FIG.

[0037] Figure 7 and Figure 8 is a cross-sectional view showing another exemplary embodiment of a display device according to the present invention;

[0038] Fig. 9 is a flowchart showing an exemplary embodiment of a method for operating a display device according to the present invention;

[0039] Fig.10 is a perspective view showing another exemplary embodiment of a display device according to the present invention;

[0040] Fig.11 is a view exemplarily showing a cross section of a first lens panel;

[0041] Fig.12 is a view exemplarily showing a cross section of a second lens panel;

[0042] Fig.13is a view exemplarily showing a state in which a first lens panel is disposed on a front surface of a display device and a second lens panel is disposed on a rear surface of the display device;

[0043] Fig.14 is a view exemplarily showing a state in which a first lens panel is disposed on a rear surface of a display device and a second lens panel is disposed on a front surface of the display device;

[0044] Fig.15 It is shown Fig.10 A schematic diagram of a portion of a cross section of a display module in FIG.

[0045] Fig.16 is a perspective view showing another exemplary embodiment of a display device according to the present invention;

[0046] Fig.17 is a view exemplarily showing an arrangement of a first lens panel, a second lens panel, and a window module of a display device in a first display mode; and

[0047] Fig.18 is a view exemplarily showing an arrangement of a first lens panel, a second lens panel, and a window module of a display device in a second display mode. DETAILED DESCRIPTION

[0048] In the present specification, it will also be understood that when a component (or region, layer, portion) is referred to as being "on", "connected to" or "coupled to" another component, the component may be directly disposed on / connected to / coupled to the other component, or an intervening third component may also be present.

[0049] The same reference numerals represent the same elements throughout the text. In addition, in the drawings, the thickness, proportion and size of the components are exaggerated for clarity of explanation. The term "and / or" includes any and all combinations of one or more of the related listed items.

[0050] It will be understood that although terms such as "first" and "second" are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one component from other components. For example, a first element referred to as a first element in one embodiment may be referred to as a second element in another exemplary embodiment without departing from the scope of the appended claims. Unless otherwise indicated, terms in the singular may include plural forms.

[0051] In addition, for ease of description, spatially relative terms such as "below", "lower", "above" and "upper" may be used herein to describe the relationship between elements and / or features as shown in the drawings and other elements and / or features. These terms may be relative concepts and are described based on the directions shown in the drawings.

[0052] The meaning of “include” or “comprising” indicates characteristics, fixed numbers, steps, operations, elements, components or a combination thereof, but does not exclude other characteristics, fixed numbers, steps, operations, elements, components or a combination thereof.

[0053] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art. Terms as defined in commonly used dictionaries should be interpreted as having the same meaning as in the context of the relevant technology, and unless clearly defined in the specification, these terms are not ideally or excessively interpreted as having a formal meaning.

[0054] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0055] Figure 1 is a perspective view showing an exemplary embodiment of a display device according to the present invention.

[0056] Reference Figure 1 , the display device DD in the exemplary embodiment of the present invention may include a display module DM and a case CS accommodating the display module DM.

[0057] The display device DD may have a rectangular shape having short sides in a first direction DR1 and long sides in a second direction DR2 crossing the first direction DR1. However, the present invention is not limited to the shape of the display device DD. In other exemplary embodiments, for example, the display device DD may have a different shape.

[0058] In an exemplary embodiment, the display device DD may include large display devices such as televisions and monitors, and small and medium-sized display devices such as mobile phones, tablet personal computers ("PCs"), navigation units for vehicles, and game consoles. However, these are merely examples, and other electronic devices are also applicable without departing from the concept of the present invention.

[0059] Hereinafter, a direction crossing a plane defined by the first direction DR1 and the second direction DR2 in a substantially perpendicular manner is defined as a third direction DR3. In this specification, the expression "plan view" may refer to a view in the third direction DR3.

[0060] In a plan view, the display device DD includes a display area DA in which an image is displayed and a frame area BZA disposed adjacent to the display area DA. The frame area BZA in which the image is not displayed may be a part of the housing CS. In an exemplary embodiment, the display device DD may include a partially curved shape. As a result, a portion of the display area DA may have a curved shape.

[0061] The display area DA may be an area in which the image IM is displayed, and a user views the image IM through the display area DA. The display area DA may have a rectangular shape. The display device DD may display a three-dimensional ("3D") image.

[0062] Non-display area NDA (reference Fig.15 ) is a region adjacent to the display area DA and in which the image IM is not displayed. The non-display area NDA may define a bezel area BZA of the display device DD.

[0063] The display device DD in the exemplary embodiment of the present invention can detect the user's input applied from the outside. In the exemplary embodiment, for example, the user's input includes various types of external inputs, such as a part of the user's body, light, heat, or pressure. In addition, the user's input may include input using tools such as a touch pen and a stylus. In addition, according to the structure of the display device DD, the display device DD can detect the user's input applied to the side surface or the rear surface of the display device DD. However, the present invention is not limited thereto.

[0064] Figure 2 It is shown Figure 1 Block diagram of a display device in FIG.

[0065] Reference Figure 2 , the display device DD may include a display module DM, a power module PM, a main electronic module MEM, and a lens module LM. The display module DM, the power module PM, the main electronic module MEM, and the lens module LM may be electrically connected to each other.

[0066] The power module PM provides power required for overall operations of the display device DD. The power module PM may include a typical battery module.

[0067] The main electronic module MEM includes various functional modules for operating the display device DD. The main electronic module MEM may be directly disposed (e.g., mounted) on a circuit board electrically connected to the display module DM, or disposed (e.g., mounted) on a separate substrate and connected to the display module DM via a connector (not shown).

[0068] The main electronic module MEM may include a control module CM, a wireless communication module TM, an image input module IIM, an audio input module AIM, a memory MM, and an external interface IF. The control module CM controls the overall operation of the display device DD. In an exemplary embodiment, the control module CM may be, for example, a microprocessor. In an exemplary embodiment, the control module CM may, for example, activate or deactivate the display module DM. The control module CM may control other modules such as the image input module IIM or the audio input module AIM.

[0069] Although not shown in the drawings, in an exemplary embodiment, the main electronic module MEM may further include, for example, a gyro sensor. The control module CM may determine the image display mode of the display device DD to be one of the first display mode and the second display mode based on a detection signal from the gyro sensor, and control the display module DM and the lens module LM accordingly.

[0070] In another exemplary embodiment, the control module CM may determine the image display mode of the display device DD to be one of the first display mode and the second display mode based on a selection signal received from the user or an application, and control the display module DM and the lens module LM accordingly.

[0071] In an exemplary embodiment, the wireless communication module TM can send / receive wireless signals to / from another terminal via a Bluetooth or WiFi link, for example. The wireless communication module TM can use a general communication line to send / receive audio signals. The wireless communication module TM includes a sending unit TM1 and a receiving unit TM2, the sending unit TM1 modulates the signal to be sent and sends the modulated signal, and the receiving unit TM2 demodulates the received signal.

[0072] The image input module IIM processes the image signal and converts the image signal into image data that can be displayed on the display module DM. The audio input module AIM receives an external audio signal through a microphone in a recording mode or a voice recognition mode and converts the received audio signal into electrical voice data.

[0073] In an exemplary embodiment, the external interface IF is used as an interface for connecting to an external charger, a wired / wireless data port, a card slot (eg, a memory card and a SIM / UIM card), and the like, for example.

[0074] The lens module LM may include a rollable lens and a lens for Figure 1 ) in which the physical / electronic components of the rollable lens are slid and / or rolled. The lens module LM will be described later.

[0075] Figure 3Ais a view exemplarily showing a display device operating in a first display mode.

[0076] Reference Figure 3A , the display device DD outputs an image IM in the vertical direction (or perpendicular direction) of the display area DA in the first display mode. In a plan view, the vertical direction is defined such that the short sides of the display device DD are respectively disposed at the upper and lower sides of the image IM, and the long sides of the display device DD are respectively disposed at the left and right sides of the image IM.

[0077] Figure 3B is a schematic exploded perspective view showing a first lens array and a display panel of a display device operating in a first display mode.

[0078] refer to Figure 3B , the display panel DP may include a plurality of pixels PX. The plurality of pixels PX may include, for example, a first type pixel, a second type pixel, and a third type pixel. In an exemplary embodiment, for example, the first type pixel may emit red light, the second type pixel may emit green light, and the third type pixel may emit blue light. However, the present invention is not limited thereto, and the first type pixel to the third type pixel may emit light of different colors. The pixels PX may be arranged in a matrix form in a first direction DR1 and a second direction DR2 substantially perpendicular to the first direction DR1. In an exemplary embodiment, the display panel DP may be, for example, a plasma display panel, a liquid crystal display panel, or an organic light emitting display panel. The first lens array LZA1 may be disposed on a first surface of the display panel DP. In an exemplary embodiment, the first lens array LZA1 may be disposed on a top surface of the display panel DP. That is, the first lens array LZA1 may be disposed adjacent to a surface of the display panel DP through which light is output.

[0079] The first lens array LZA1 may include a plurality of first lens units LZU1 arranged in a first direction DR1. Each of the plurality of first lens units LZU1 may be a cylindrical lens. The first lens array LZA1 using cylindrical lenses adopts an oblique line arrangement method, by which each of the plurality of first lens units LZU1 is inclined at a predetermined angle to compensate for the reduced resolution in the second direction DR2. In an exemplary embodiment, for example, each of the plurality of first lens units LZU1 may have a shape inclined at a first inclination angle A1 relative to a first reference line RL1. The first reference line RL1 may be a virtual line parallel to a second direction DR2 perpendicularly intersecting the first direction DR1.

[0080] The first inclination angle A1 may be determined in consideration of a pitch between pixels PX in the first direction DR1 , a pitch between pixels PX in the second direction DR2 , and a pitch between the plurality of first lens units LZU1 .

[0081] Figure 3A and Figure 3B The display panel DP of the display device DD in the first display mode outputs an image signal suitable for the vertical direction (or perpendicular direction) of the display area DA. The image signal output from the display panel DP can pass through the first lens array LZA1 and be provided to the user as a 3D image.

[0082] If the user will Figure 3A and Figure 3B The display device DD in the display is moved to be in the horizontal direction. Even if the display panel DP outputs an image signal suitable for the horizontal direction (or the lateral direction), the image signal transmitted through the first lens array LZA1 may not be recognized by the user as a 3D image.

[0083] Figure 4A is a view exemplarily showing a display device operating in a second display mode.

[0084] Reference Figure 4A , the display device DD outputs an image IM in the horizontal direction (or lateral direction) of the display area DA in the second display mode. In a plan view, the horizontal direction is defined such that the short sides of the display device DD are respectively disposed at the left and right sides of the image IM, and the long sides of the display device DD are respectively disposed at the upper and lower sides of the image IM.

[0085] Figure 4B is a schematic exploded perspective view showing a second lens array and a display panel of a display device operating in a second display mode. In addition to the arrangement direction, Figure 4B The display panel DP in Figure 3B The display panel DP is the same as in.

[0086] Reference Figure 4B , the second lens array LZA2 may be disposed on the first surface of the display panel DP. In an exemplary embodiment, the second lens array LZA2 may be disposed on the top surface of the display panel DP. That is, the second lens array LZA2 may be disposed adjacent to the surface of the display panel DP through which light is output.

[0087] The second lens array LZA2 may include a plurality of second lens units LZU2 arranged in the second direction DR2. Each of the plurality of second lens units LZU2 may be a cylindrical lens. The second lens array LZA2 using cylindrical lenses adopts an oblique line arrangement method, by which each of the plurality of second lens units LZU2 is inclined at a predetermined angle to compensate for the reduced resolution in the first direction DR1. In an exemplary embodiment, for example, each of the plurality of second lens units LZU2 may have a shape inclined at a second inclination angle A2 relative to a second reference line RL2. The second reference line RL2 may be a virtual line parallel to the first direction DR1 perpendicularly intersecting the second direction DR2.

[0088] The second tilt angle A2 may be determined in consideration of the intervals between pixels PX in the first direction DR1, the intervals between pixels PX in the second direction DR2, and the intervals between the plurality of second lens units LZU2. The second tilt angle A2 may be the same as or different from the first tilt angle A1.

[0089] Figure 4A and Figure 4B The display panel DP of the display device DD in the second display mode outputs an image signal suitable for the horizontal direction (or lateral direction) of the display area DA. The image signal output from the display panel DP can pass through the second lens array LZA2 and be provided to the user as a 3D image.

[0090] If the user will Figure 4A and Figure 4B The display device DD in the display is moved to be in the vertical direction. Even if the display panel DP outputs an image signal suitable for the vertical direction (or perpendicular direction), the image signal transmitted through the second lens array LZA2 may not be recognized by the user as a 3D image.

[0091] like Figure 3B and Figure 4B As shown in, one of the first lens array LZA1 and the second lens array LZA2 can be selectively used according to the arrangement direction of the display panel DP (i.e., the image display mode). In the display device DD in the exemplary embodiment of the present invention, one of the first lens array LZA1 and the second lens array LZA2 can be set on the top surface of the display panel DP according to the image display mode.

[0092] Figure 5 and Figure 6 It is along Figure 1 A cross-sectional view of the display device taken along line II'.

[0093] Reference Figure 5 and Figure 6, the display device DD includes a display module DM, a rollable lens RLZ, a housing CS, and a roller. The display module DM may include a display panel DP and a window module WM. The roller may include a first roller RM1 and a second roller RM2.

[0094] The display panel DP may be an organic light emitting display panel. However, the present invention is not limited thereto. In other exemplary embodiments, for example, a variety of display panels capable of displaying images, such as a liquid crystal display panel, an electrowetting display panel, and an electrophoretic display panel, may be used as the display panel DP. The display panel DP may be a flexible display panel. Although not shown in the drawings, the display panel DP may include a substrate, a pixel layer disposed on the substrate, and a thin film encapsulation layer disposed on the substrate to cover the pixel layer.

[0095] The display panel DP may be disposed in the accommodation space ST between the first roller RM1 and the second roller RM2. Although not shown in the drawings, Figure 2 The power module PM and the main electronic module MEM in the receiving space ST may be disposed in the receiving space ST. In addition, although not shown in the drawings, a supporting member for fixing the display panel DP and the like may be further disposed in the receiving space ST.

[0096] Figure 2 The lens module LM in may include a rollable lens RLZ and first and second rollers RM1 and RM2 for moving the rollable lens RLZ.

[0097] The first roller RM1 and the second roller RM2 may be spaced apart from each other in the first direction DR1 inside the rollable lens RLZ. Although not shown in the drawings, the first roller RM1 and the second roller RM2 may be rotated by bearings. The first roller RM1 and the second roller RM2 may be coated with an adhesive layer (not shown) having a weak adhesive function to closely contact the inside of the rollable lens RLZ. Therefore, the first roller RM1 and the second roller RM2 may move the rollable lens RLZ while rotating along one of the first rotation direction RD1 (or counterclockwise direction) and the second rotation direction RD2 (or clockwise direction). In an exemplary embodiment, although the first roller RM1 and the second roller RM2 may move in both the first rotation direction RD1 and the second rotation direction RD2, the present invention is not limited thereto. In another exemplary embodiment, the first roller RM1 and the second roller RM2 may rotate only in one of the first rotation direction RD1 and the second rotation direction RD2.

[0098] The rollable lens RLZ includes a first lens array LZA1, a second lens array LZA2, and a connection portion NL. The connection portion NL may be disposed between the first lens array LZA1 and the second lens array LZA2 and include a transparent material.

[0099] like Figure 3B As shown in , the first lens array LZA1 may include a plurality of first lens units LZU1. Each of the plurality of first lens units LZU1 may have a shape inclined at a first inclination angle A1 relative to a first reference line RL1. The first reference line RL1 may be a virtual line parallel to a second direction DR2 perpendicularly intersecting the first direction DR1. In an exemplary embodiment, for example, the first lens array LZA1 may be a lens suitable for a first display mode, in which the display device DD outputs an image in a vertical direction (or a vertical direction).

[0100] like Figure 4B As shown in , the second lens array LZA2 may include a plurality of second lens units LZU2. Each of the plurality of second lens units LZU2 may have a shape inclined at a second inclination angle A2 relative to a second reference line RL2. The second reference line RL2 may be a virtual line parallel to a first direction DR1 perpendicularly intersecting the second direction DR2. In an exemplary embodiment, for example, the second lens array LZA2 may be a lens suitable for a second display mode, in which the display device DD outputs an image in a horizontal direction (or a lateral direction).

[0101] like Figure 5 As shown in FIG. 1 , in the first display mode, the first roller RM1 and the second roller RM2 may rotate in one of the first rotation direction RD1 and the second rotation direction RD2 to rotate the rollable lens RLZ so that the first lens array LZA1 is disposed on the top surface of the display panel DP.

[0102] like Figure 6 As shown in FIG. , in the second display mode, the first roller RM1 and the second roller RM2 can rotate in one of the first rotation direction RD1 and the second rotation direction RD2 to rotate the rollable lens RLZ so that the second lens array LZA2 is disposed on the top surface of the display panel DP.

[0103] like Figure 5 and Figure 6 As shown in , since one of the first lens array LZA1 and the second lens array LZA2 is disposed on the top surface of the display panel DP according to the image display mode, the user can view a 3D image regardless of the image display direction of the display device DD.

[0104] Figure 7 and Figure 8 is a cross-sectional view showing another exemplary embodiment of a display device according to the present invention.

[0105] Reference Figure 7 and Figure 8The display device DD1 includes a display module DM, a rollable lens RLZ, a housing CS, a first roller RM11, and a second roller RM12. Figure 7 and Figure 8 The display module DM, the rollable lens RLZ and the housing CS are Figure 5 and Figure 6 The display module DM, the rollable lens RLZ, and the case CS in FIG. 4 have the same configuration, and thus the same reference numerals are assigned, and overlapping descriptions will be omitted.

[0106] The first roller RM11 and the second roller RM12 may be spaced apart from each other in the second direction DR2 inside the rollable lens RLZ. Although not shown in the drawings, the first roller RM11 and the second roller RM12 may be rotated by bearings. The first roller RM11 and the second roller RM12 may be coated with an adhesive layer (not shown) having a weak adhesive function to closely contact the inside of the rollable lens RLZ. Therefore, the first roller RM11 and the second roller RM12 may move the rollable lens RLZ while rotating along one of the first rotation direction RD11 (or counterclockwise) and the second rotation direction RD12 (or clockwise). In an exemplary embodiment, although the first roller RM11 and the second roller RM12 may move in both the first rotation direction RD11 and the second rotation direction RD12, the present invention is not limited thereto. In another exemplary embodiment, the first roller RM11 and the second roller RM12 may rotate only in one of the first rotation direction RD11 and the second rotation direction RD12.

[0107] like Figure 7 As shown in FIG. , in the first display mode, the first roller RM11 and the second roller RM12 may rotate in one of the first rotation direction RD11 and the second rotation direction RD12 to rotate the rollable lens RLZ so that the first lens array LZA1 is disposed on the top surface of the display panel DP.

[0108] like Figure 8 As shown in FIG. , in the second display mode, the first roller RM11 and the second roller RM12 can rotate in one of the first rotation direction RD11 and the second rotation direction RD12 to rotate the rollable lens RLZ so that the second lens array LZA2 is disposed on the top surface of the display panel DP.

[0109] like Figure 7 and Figure 8 As shown in , since one of the first lens array LZA1 and the second lens array LZA2 is disposed on the top surface of the display panel DP according to the image display mode, the user can view a 3D image regardless of the image display direction of the display device DD1.

[0110] exist Figure 5 and Figure 6 In the exemplary embodiment of the display device DD, the first roller RM1 and the second roller RM2 may be spaced apart from each other in the first direction DR1 inside the rollable lens RLZ. Figure 7 and Figure 8 In an exemplary embodiment of the display device DD1, the first roller RM11 and the second roller RM12 may be spaced apart from each other in the second direction DR2 inside the rollable lens RLZ. As described above, the arrangement of the rollers RM1, RM2, RM11, and RM12 and the rotation direction of the rollable lens RLZ may be selectively applied to the display device as needed.

[0111] Fig. 9 is a flowchart showing an exemplary embodiment of a method of operating a display device according to the present invention.

[0112] Reference Figure 2 , Figure 6 and Fig. 9 , in operation S100 , the control module CM detects movement of the display device DD.

[0113] In operation S110, the control module CM determines whether to change the image display mode according to the degree of movement of the display device DD by the user. In an exemplary embodiment, the control module CM may determine whether the image display mode of the display device DD is changed based on a detection signal from at least one device (such as a gyroscope) capable of detecting angular momentum, momentum, movement direction, and movement distance.

[0114] The control module CM may determine the image display mode to be the first display mode when determining that the display device DD moves in the vertical direction (or perpendicular direction).

[0115] In the first display mode, the control module CM controls the first roller RM1 and the second roller RM2 of the lens module LM to rotate the rollable lens RLZ so that the first lens array LZA1 is disposed on the top surface of the display panel DP in operation S120.

[0116] The control module CM may determine the image display mode to be the second display mode when determining that the display device DD moves in the horizontal direction (or the lateral direction).

[0117] In the second display mode, the control module CM controls the first roller RM1 and the second roller RM2 of the lens module LM to rotate the rollable lens RLZ so that the second lens array LZA2 is disposed on the top surface of the display panel DP in operation S130.

[0118] In another exemplary embodiment, the control module CM may determine the image display mode of the display device DD to be one of the first display mode and the second display mode based on the operation of a physical button / switch input by the user or a selection signal received from an application, rather than based on the user's movement of the display device DD.

[0119] As described above, the control module CM determines the image display mode of the display device DD, and controls according to the determined image display mode so that one of the first lens array LZA1 and the second lens array LZA2 is disposed on the top surface of the display panel DP. Therefore, regardless of the screen direction (horizontal or vertical) of the display device, the user can watch the 3D image.

[0120] Fig.10 is a perspective view showing another exemplary embodiment of a display device according to the present invention.

[0121] Reference Fig.10 , the display device DD2 may include a display module DM2, a case CS accommodating the display module DM2, a first lens panel LZP1, and a second lens panel LZP2.

[0122] The display device DD2 may have a rectangular shape having short sides in the first direction DR1 and long sides in the second direction DR2 crossing the first direction DR1. However, the present invention is not limited to the shape of the display device DD2. In other exemplary embodiments, for example, the display device DD2 may have a different shape.

[0123] In an exemplary embodiment, the display device DD2 may be a small and medium-sized display device such as a mobile phone, a tablet PC, a navigation unit for a vehicle, and a game console. However, these are merely examples, and other electronic devices are also applicable without departing from the concept of the present invention.

[0124] In a plan view, the display device DD2 includes a display area DA in which an image is displayed and a frame area BZA disposed adjacent to the display area DA. The frame area BZA in which the image is not displayed may be a part of the housing CS. In an exemplary embodiment, the display device DD2 may include a partially curved shape. As a result, a portion of the display area DA may have a curved shape.

[0125] The display device DD2 may further include a first connection portion CNT1 and a second connection portion CNT2.

[0126] The first connection portion CNT1 may be attached to one side of the housing CS to connect the housing CS and the first lens panel LZP1. In another exemplary embodiment, the first connection portion CNT1 and the first lens panel LZP1 may be integral with each other. The first connection portion CNT1 may include a variety of materials having flexible or bendable characteristics so that the first lens panel LZP1 moves to be disposed on the front surface or rear surface of the display device DD2.

[0127] The second connection portion CNT2 may be attached to the other side of the housing CS to connect the housing CS and the second lens panel LZP2. In another exemplary embodiment, the second connection portion CNT2 and the second lens panel LZP2 may be integral with each other. The second connection portion CNT2 may include a variety of materials having flexible or bendable characteristics so that the second lens panel LZP2 moves to be disposed on the front surface or rear surface of the display device DD2.

[0128] Despite Fig.10 In the exemplary embodiment shown in FIG. 1 , the first lens panel LZP1 is connected to one of the long sides of the display device DD2 through the first connection portion CNT1, and the second lens panel LZP2 is connected to the other of the long sides of the display device DD2 through the second connection portion CNT2, but the present invention is not limited thereto. In another exemplary embodiment, the first lens panel LZP1 and the second lens panel LZP2 may be connected to the short sides of the display device DD2, respectively.

[0129] Each of the first lens panel LZP1 and the second lens panel LZP2 may have a size greater than or equal to that of the display area DA. The first lens panel LZP1 may include Figure 3B The first lens array LZA1 in the second lens panel LZP2 may include Figure 4B The second lens array LZA2 in.

[0130] The display device DD2 may include at least one coupling member for coupling and / or fixing the first lens panel LZP1 to the case CS when the first lens panel LZP1 is disposed on the front surface or the rear surface of the display device DD2. In an exemplary embodiment, although the first lens panel LZP1 includes the clamps CL11 and CL12 as coupling members, the present invention is not limited thereto.

[0131] The display device DD2 may include at least one coupling member for coupling and / or fixing the second lens panel LZP2 to the case CS when the second lens panel LZP2 is disposed on the front surface or the rear surface of the display device DD2. In an exemplary embodiment, although the second lens panel LZP2 includes the clamps CL21 and CL22 as coupling members, the present invention is not limited thereto.

[0132] Fig.11 2 is a view exemplarily showing a cross section of the first lens panel LZP1 .

[0133] Reference Fig.11 , the first lens panel LZP1 includes a first lens array LZA1 and a first lens substrate LS1. The first lens array LZA1 may include a plurality of first lens units LZU1 arranged in a first direction DR1. Figure 3B As shown in , the first lens array LZA1 may include a plurality of first lens units LZU1 inclined at a first inclination angle A1 with respect to a first reference line RL1.

[0134] The first lens substrate LS1 may include a rigid plastic substrate as a transparent substrate. Preferably, the first lens substrate LS1 may include a non-refracting Fig.10 ) The first lens substrate LS1 can protect the first lens array LZA1 from external impact.

[0135] Fig.12 : is a view exemplarily showing a cross section of the second lens panel LZP2.

[0136] Reference Fig.12 The second lens panel LZP2 includes a second lens array LZA2 and a second lens substrate LS2. The second lens array LZA2 may include a plurality of second lens units LZU2 arranged in a second direction DR2. Figure 4B As shown in , the second lens array LZA2 may include a plurality of second lens units LZU2 inclined at a second inclination angle A2 with respect to a second reference line RL2.

[0137] The second lens substrate LS2 may include a rigid plastic substrate as a transparent substrate. Preferably, the second lens substrate LS2 may include a non-refracting Fig.10 ) The second lens substrate LS2 can protect the second lens array LZA2 from external impact.

[0138] Fig.13 2 is a view exemplarily showing a state in which the first lens panel LZP1 is disposed on the front surface of the display device DD2 and the second lens panel LZP2 is disposed on the rear surface of the display device DD2.

[0139] Reference Fig.13 , the display device DD2 outputs an image IM in the vertical direction (or perpendicular direction) of the display area DA in the first display mode.

[0140] Since the first lens panel LZP1 is disposed on the front surface of the display device DD2 and the second lens panel LZP2 is disposed on the rear surface of the display device DD2 in the first display mode, the user may view the 3D image IM.

[0141] The first lens panel LZP1 may be disposed on the front surface of the display device DD2, and then the clamps CL11 and CL12 may be coupled to the right long side of the case CS. The first lens panel LZP1 may be fixed to the front surface of the display device DD2 by the clamps CL11 and CL12.

[0142] Although not shown in the figure, the second lens panel LZP2 may be disposed on the rear surface of the display device DD2, and then the clamps CL21 and CL22 (refer to Fig.10 ) may be coupled to the left long side of the case CS. The second lens panel LZP2 may be fixed to the rear surface of the display device DD2 by the clamps CL21 and CL22.

[0143] Fig.14 2 is a view exemplarily showing a state in which the first lens panel LZP1 is disposed on the rear surface of the display device DD2 and the second lens panel LZP2 is disposed on the front surface of the display device DD2.

[0144] Reference Fig.14 , the display device DD2 outputs an image IM in the horizontal direction (or transverse direction) of the display area DA in the second display mode.

[0145] Since the first lens panel LZP1 is disposed on the rear surface of the display device DD2 and the second lens panel LZP2 is disposed on the front surface of the display device DD2 in the second display mode, the user may view the 3D image IM.

[0146] The first lens panel LZP1 may be disposed on the rear surface of the display device DD2, and then the clamps CL11 and CL12 may be coupled to the right long side of the case CS. The first lens panel LZP1 may be fixed to the rear surface of the display device DD2 by the clamps CL11 and CL12.

[0147] The second lens panel LZP2 may be disposed on the front surface of the display device DD2, and then the clamps CL21 and CL22 may be coupled to the left long side of the case CS. The second lens panel LZP2 may be fixed to the front surface of the display device DD2 by the clamps CL21 and CL22.

[0148] Fig.15 It is shown Fig.10 Schematic diagram of a portion of a cross section of a display module DM2.

[0149] Reference Fig.15 , the display module DM2 may include a display panel DP, a protection film PF and an adhesive layer OCA.

[0150] The display panel DP may be an organic light emitting display panel. However, the present invention is not limited thereto. In an exemplary embodiment, various display panels capable of displaying images, such as a liquid crystal display panel, an electrowetting display panel, and an electrophoretic display panel, may be used as the display panel DP. The display panel DP may be a flexible display panel.

[0151] The display panel DP may include a substrate SUB, a pixel layer PXL disposed on the substrate SUB, and a thin film encapsulation layer TFE disposed on the substrate SUB to cover the pixel layer PXL. The substrate SUB may include a flexible plastic substrate as a transparent substrate. In an exemplary embodiment, the substrate SUB may include, for example, polyimide.

[0152] The substrate SUB may include a display area DM-DA and a non-display area NDA surrounding the display area DM-DA. The pixel layer PXL may be disposed on the display area DM-DA. The pixel layer PXL may include a plurality of pixels, and each of the pixels may include a light emitting element. The display area DM-DA may correspond to Fig.10 The display area DA of the display device DD2 in FIG. 1 and the non-display area NDA may correspond to Fig.10 The border area BZA of the display device DD2 in the frame.

[0153] The thin film encapsulation layer TFE may include at least two inorganic layers and an organic layer disposed between the inorganic layers. The inorganic layer may include an inorganic material and protect the pixel layer PXL from moisture / oxygen. The organic layer may include an organic material and protect the pixel layer PXL from foreign matter such as dust particles.

[0154] Although not shown in the drawings, a touch sensing unit for detecting an external input (a user's hand or a touch pen) may be further provided on the thin film encapsulation layer TFE. In another exemplary embodiment, the touch sensing portion may be manufactured as a touch panel separated from the display panel DP and attached to the display panel DP by an adhesive.

[0155] The protective film PF is disposed on the thin film encapsulation layer TFE. The protective film PF includes a polymer material. The protective film PF can absorb impacts applied from the outside to protect the display panel DP from the impact. The protective film PF can be adhered to the top surface of the display panel DP through the adhesive layer OCA. When the display module DM2 also includes a touch sensing unit on the thin film encapsulation layer TFE, the protective film PF can be disposed on the touch sensing unit. In another exemplary embodiment, the protective film PF can be omitted. The adhesive layer OCA may include an optically transparent adhesive. The image generated from the display panel DP can pass through the protective film PF and be provided to the user.

[0156] In an exemplary embodiment, preferably, the adhesive layer OCA and the protection film PF may include a material that does not refract light generated from the display panel DP.

[0157] Fig.16 is a perspective view showing another exemplary embodiment of a display device according to the present invention.

[0158] Reference Fig.16 , display device DD3 and Fig.10 The display device DD2 in FIG. 4 has a similar configuration, and further includes a third connection portion CNT3 , a third clamp CL31 , and a window module WM.

[0159] The window module WM may be connected to the short side of the housing CS via a third connection portion CNT3. The third connection portion CNT3 may include a flexible material. In another exemplary embodiment, the third connection portion CNT3 may be integral with the window module WM. In the exemplary embodiment shown, the window module WM is connected to the upper short side of the housing CS, but the present invention is not limited thereto, and the window module WM may be connected to the lower short side of the housing CS, or to both the upper and lower short sides of the housing CS.

[0160] The window module WM may protect the display module DM2 from external scratches and impacts. An image IM generated from the display module DM2 may pass through the window module WM and be provided to a user.

[0161] When the display image IM is a two-dimensional image (ie, in a normal display mode), the window module WM may be disposed on the front surface of the display device DD3, and the first and second lens panels LZP1 and LZP2 may overlap at the rear surface of the display device DD3.

[0162] Fig.17 is a view exemplarily showing the arrangement of the first lens panel LZP1 , the second lens panel LZP2 , and the window module WM of the display device DD3 .

[0163] Reference Fig.17, since the first lens panel LZP1 is disposed on the front surface of the display device DD3 and the second lens panel LZP2 is disposed on the rear surface of the display device DD3, the user can view the 3D image IM. Here, the first lens panel LZP1 and the display module DM2 can be protected by disposing the window module WM on the top surface of the first lens panel LZP1. In an exemplary embodiment, the third clamp CL31 may be coupled to the lower short side of the case CS.

[0164] Fig.18 is a view exemplarily showing the arrangement of the first lens panel LZP1, the second lens panel LZP2, and the window module WM of the display device DD3 in the second display mode.

[0165] Reference Fig.18 , since the first lens panel LZP1 is disposed on the rear surface of the display device DD3 and the second lens panel LZP2 is disposed on the front surface of the display device DD3 in the second display mode, the user can view the 3D image IM. Here, the second lens panel LZP2 and the display module DM2 can be protected by disposing the window module WM on the top surface of the second lens panel LZP2. In an exemplary embodiment, the third clamp CL31 may be coupled to the lower short side of the case CS.

[0166] The display device having the above structure can set the first lens array on the top surface of the display panel when the screen direction is the vertical (perpendicular) direction, and set the second lens array on the top surface of the display panel when the screen direction is the horizontal (lateral) direction. Therefore, the display device can display 3D images regardless of the screen direction.

[0167] Although exemplary embodiments of the present invention have been described, it should be understood that the present invention should not be limited to these exemplary embodiments, but various changes and modifications may be made by those having ordinary skill in the art.

[0168] Therefore, the actual protection scope of the present invention will be determined by the technical scope of the appended claims.

Claims

1. A display device, comprising: a display panel that displays an image according to an image display mode, the display panel comprising a surface on which the image is displayed, wherein the image display mode comprises a first display mode and a second display mode; A rollable lens comprising a first lens array and a second lens array spaced apart from the first lens array; as well as a roller disposed inside the rollable lens, wherein, in the first display mode, the roller rotates the rollable lens so that the first lens array is disposed on the surface of the display panel, and In the second display mode, the roller rotates the rollable lens so that the second lens array is disposed on the surface of the display panel.

2. The display device according to claim 1, wherein: In the first display mode, the image is output in a vertical direction of the display panel, and in the second display mode, the image is output in a horizontal direction of the display panel.

3. The display device according to claim 2, wherein: The first lens array includes a plurality of first lens units arranged in a first direction, and the second lens array includes a plurality of second lens units arranged in a second direction crossing the first direction.

4. The display device according to claim 3, wherein: The plurality of first lens units have a shape inclined at a first inclination angle with respect to a virtual first reference line parallel to the second direction, and The plurality of second lens units have a shape that is inclined at a second inclination angle with respect to a virtual second reference line that is parallel to the first direction.

5. The display device according to claim 4, wherein: Each of the plurality of first lens units and the plurality of second lens units includes a cylindrical lens.

6. The display device according to claim 4, wherein: The first inclination angle is different from the second inclination angle.

7. The display device according to claim 3, wherein: The rollers include a first roller and a second roller, and the first roller and the second roller are spaced apart from each other in the first direction or the second direction.

8. The display device according to claim 7, wherein: When the image display mode of the display panel is switched from the second display mode to the first display mode, the first roller and the second roller move the rollable lens in a first rotation direction so that the first lens array is disposed on the surface of the display panel, and When the image display mode of the display panel is switched from the first display mode to the second display mode, the first roller and the second roller move the rollable lens in a second rotation direction different from the first rotation direction, so that the second lens array is disposed on the surface of the display panel.

9. The display device according to claim 8, wherein: The first roller and the second roller are respectively disposed to correspond to long sides of the display panel.

10. The display device according to claim 8, wherein: The first roller and the second roller are respectively disposed to correspond to short sides of the display panel.

11. The display device according to claim 8, wherein: A size of each of the first lens array and the second lens array is greater than or equal to a size of the display panel. 12 . The display device of claim 1 , further comprising a window module corresponding to the surface of the display panel and disposed on the rollable lens. 13 . The display device of claim 1 , further comprising a housing accommodating the rollable lens, the display panel, and the roller.

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