Display apparatus

Abstract

This display apparatus comprises: a light source array configured to emit light in a first direction; and a multi-viewpoint lens adjacent to the light source array in the first direction. The light source array includes: a first light source configured to emit light in order to provide an image at a first viewpoint among a plurality of viewpoints; and a second light source that is adjacent to the first light source in a second direction different from the first direction and configured to emit light in order to provide an image at a second viewpoint adjacent to the first viewpoint among the plurality of viewpoints. The multi-viewpoint lens includes: a refraction unit configured to refract light, emitted from the first light source, to the first viewpoint; and a reflection unit that is adjacent to the refraction unit in the second direction and configured to reflect light, emitted from the second light source, to the second viewpoint.

Description

display device

[0001] Embodiments of the present disclosure relate to a display device.

[0002] A display device is a type of output device that converts acquired or stored electrical information into visual information and displays it to the user, and is used in various fields such as homes and businesses.

[0003] Display devices include, for example, monitor devices connected to personal computers or server computers, portable computer devices, navigation terminal devices, general television devices, Internet Protocol television (IPTV) devices, portable terminal devices such as smart phones, tablet PCs, personal digital assistants (PDAs), or cellular phones, various display devices used to play images such as advertisements or movies in industrial settings, and various types of audio / video systems.

[0004] Display devices include a type that provides the same image to multiple viewpoints looking at the screen, and a multi-view display type that provides different images depending on the viewpoint.

[0005] Multi-view display devices can provide different images depending on the viewing angle by modulating light emitted from external or internal light sources. Holography and stereoscopy are two methods for providing different images depending on the viewing angle.

[0006] Holography is a method that uses the interference phenomenon of coherent light to provide different images depending on the viewpoint.

[0007] Stereoscopic method is a method of providing multiple two-dimensional images separated by viewpoint.

[0008] Stereoscopic methods include autostereoscopic methods, which separate images from a display device to form a field of view. Types of autostereoscopic methods include parallax barrier methods, which utilize parallax barriers, and lenticular lens methods.

[0009] The lenticular lens method is a method that refracts light incident from pixels to a lenticular lens and emits it in a desired direction, thereby providing different images at multiple viewpoints.

[0010] One or more embodiments provide a display device having an improved structure to provide different images at multiple points in time.

[0011] One or more embodiments provide a display device having an improved structure to expand the area of ​​multiple viewpoints.

[0012] One or more embodiments provide a display device having an improved structure that reduces noise in an image and improves image quality.

[0013] One or more embodiments provide a display device having an improved structure to prevent a decrease in brightness of an image while expanding a region of multiple viewpoints.

[0014] The technical problems to be achieved in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0015] According to one or more aspects of the embodiments, a display device is provided that is configured to provide a plurality of different images at a plurality of viewpoints, the display device comprising: a light source array configured to emit light in a first direction; and a multi-view lens adjacent to the light source array in the first direction, the light source array comprising: a first light source configured to emit light to provide an image at a first viewpoint among the plurality of viewpoints; and a second light source adjacent to the first light source in a second direction different from the first direction and configured to emit light to provide an image at a second viewpoint adjacent to the first viewpoint in the second direction among the plurality of viewpoints, the multi-view lens comprising: a refracting portion configured to refract light emitted from the first light source toward the first viewpoint; and a reflecting portion adjacent to the refracting portion in the second direction and configured to reflect light emitted from the second light source toward the second viewpoint.

[0016] The above refracting portion may have a lens axis passing through the focus of the refracting portion in the first direction. The reflecting portion may include a reflective surface inclined with respect to the first direction such that the distance between the reflecting portion and the lens axis decreases as the distance from the second light source to the reflecting portion in the second direction increases.

[0017] The above reflector may have a predetermined refractive index. The above reflector may include a reflective surface configured to totally reflect light incident on the reflector from the second light source.

[0018] The above reflective portion may further include a refracting surface configured to allow light reflected by the reflective surface to be incident. The refracting surface may be configured to refract the light reflected by the reflective surface so that the angle at which the refracted light is inclined with respect to the first direction is reduced.

[0019] The second light source may include a first edge light source arranged on a first side of the first light source in the second direction, and a second edge light source arranged on a second side of the first light source opposite the first side of the first light source in the second direction. The reflector may include a first reflector arranged on a first side of the refracting portion in the second direction and configured to reflect light emitted from the first edge light source, and a second reflector arranged on a second side of the refracting portion opposite the first side of the refracting portion in the second direction and configured to reflect light emitted from the second edge light source.

[0020] The second viewpoint may include a first edge viewpoint disposed on a first side of the first viewpoint in the second direction, and a second edge viewpoint disposed on a second side of the first viewpoint opposite the first side of the first viewpoint in the second direction. The first reflector may be configured to reflect light from the first edge light source to the first edge viewpoint. The second reflector may be configured to reflect light from the second edge light source to the second edge viewpoint.

[0021] The above re-focusing lens may be adjacent to one side of the first direction side of the light source array.

[0022] The display device may further include an optical sheet disposed between the light source array and the re-focusing lens. The optical sheet may be configured to limit the range of light emitted from the first light source and incident on the refracting portion to a first width, and may be configured to limit the range of light emitted from the second light source and incident on the reflecting portion to a second width smaller than the first width.

[0023] The optical sheet may include a first hole configured to transmit at least a portion of light emitted from the first light source and traveling toward the refracting portion, and a second hole adjacent to the first hole in the second direction and configured to transmit at least a portion of light emitted from the second light source and traveling toward the reflecting portion. The size of the second hole may be smaller than the size of the first hole.

[0024] The first light source may be configured to emit light in a range of a first width toward the refracting portion, and the second light source may be configured to emit light in a range of a second width smaller than the first width toward the reflecting portion.

[0025] The light source array may include a plurality of light source arrays that are partitioned from each other. The multi-view lens may include a plurality of multi-view lenses corresponding to the plurality of light source arrays, respectively. The refracting unit of each of the plurality of multi-view lenses may be configured to refract light so that light from the first light source of each of the plurality of light source arrays proceeds toward the same first viewpoint. The reflecting unit of each of the plurality of multi-view lenses may be configured to reflect light so that light from the second light source of each of the plurality of arrays proceeds toward the same second viewpoint.

[0026] The light source array may include a plurality of light source arrays that are partitioned from each other. The plurality of light source arrays may include a central light source array arranged at the center of the plurality of light source arrays in the second direction, and an outer light source array adjacent to the central light source array in the second direction. The multi-view lens may include a plurality of multi-view lenses. The plurality of multi-view lenses may include a central multi-view lens adjacent to the central light source array in the first direction, and an outer multi-view lens adjacent to the outer light source array in the first direction.

[0027] The above outer re-focusing lens may have an asymmetrical shape with respect to the center of the outer re-focusing lens in the second direction.

[0028] The angle at which the direction of travel of light emitted from the reflector included in the outer re-focusing lens is inclined with respect to the first direction may be greater than the angle at which the direction of travel of light emitted from the reflector included in the central re-focusing lens is inclined with respect to the first direction.

[0029] The first direction and the second direction may be perpendicular to each other. The re-focusing lens may extend in a third direction different from the first direction and the second direction.

[0030] According to another aspect of one or more embodiments, a display device configured to provide a plurality of different images at a plurality of viewpoints is provided, the display device comprising a light source array configured to emit light in a first direction, a multi-view lens adjacent to the light source array in the first direction, and an optical sheet disposed between the light source array and the multi-view lens, wherein the light source array comprises a first light source configured to emit light to provide an image at a first viewpoint among the plurality of viewpoints, and a second light source adjacent to the first light source in a second direction different from the first direction and configured to emit light to provide an image at a second viewpoint adjacent to the first viewpoint in the second direction among the plurality of viewpoints, the multi-view lens comprising a refracting portion configured to refract light emitted from the first light source toward the first viewpoint, and a reflecting portion adjacent to the refracting portion in the second direction and configured to reflect light emitted from the second light source toward the second viewpoint.

[0031] The above refracting portion may have a lens axis passing through the focus of the refracting portion in the first direction. The reflecting portion may include a reflective surface inclined with respect to the first direction such that the distance between the reflecting portion and the lens axis decreases as the distance from the second light source to the reflecting portion in the second direction increases.

[0032] The above reflector may have a predetermined refractive index. The above reflector may include a reflective surface configured to totally reflect light incident on the reflector from the second light source.

[0033] The above reflective portion may further include a refracting surface configured to allow light reflected by the reflective surface to be incident. The refracting surface may be configured to refract the light reflected by the reflective surface so that the angle at which the refracted light is inclined with respect to the first direction is reduced.

[0034] The optical sheet may be configured to limit the range of light emitted from the first light source and incident on the refracting portion to a first width, and may be configured to limit the range of light emitted from the second light source and incident on the reflecting portion to a second width smaller than the first width.

[0035] The embodiments will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings.

[0036] FIG. 1 is a perspective view of a display device according to one or more embodiments.

[0037] FIG. 2 is a diagram illustrating an image provided from a display device at multiple viewpoints according to one or more embodiments.

[0038] FIG. 3 is an exploded perspective view showing the components of a display device according to one or more embodiments.

[0039] FIG. 4 is a diagram illustrating a light source array and light sources included therein of a display device according to one or more embodiments.

[0040] FIG. 5 is an exploded view of a light source array, a re-focusing lens, and an optical sheet of a display device according to one or more embodiments.

[0041] FIG. 6 is an enlarged view of a light source array and a refocusing lens of a display device according to one or more embodiments.

[0042] FIG. 7 is an enlarged view of a light source array and a refocusing lens of a display device according to one or more embodiments.

[0043] FIG. 8 is a drawing illustrating an example of a re-focusing lens of a display device according to one or more embodiments having a flat reflective surface.

[0044] FIG. 9 is a drawing illustrating an example of a re-focusing lens of a display device according to one or more embodiments having a coated reflective surface.

[0045] FIG. 10 is a diagram illustrating an example of a re-focusing lens of a display device according to one or more embodiments including a reflective portion including a mirror.

[0046] FIG. 11 is a diagram illustrating light emitted from a plurality of light sources of a display device according to one or more embodiments passing through an optical sheet.

[0047] FIG. 12 is a diagram illustrating light emitted from a plurality of light sources of a display device according to one or more embodiments passing through holes of an optical sheet.

[0048] FIG. 13 is a diagram illustrating a state in which light emitted from a plurality of light sources of a display device according to one or more embodiments passes through an optical sheet including a high refractive index portion and a low refractive index portion.

[0049] FIG. 14 is a diagram illustrating a state in which light emitted from a plurality of light sources of a display device according to one or more embodiments passes through an optical sheet including a high refractive index portion and a low refractive index portion.

[0050] FIG. 15 is a diagram illustrating a state in which light emitted from a plurality of light sources of a display device according to one or more embodiments passes through an optical sheet including a high refractive index portion and a low refractive index portion.

[0051] FIG. 16 is a diagram illustrating how light emitted from a plurality of light sources of a display device according to one or more embodiments travels to a refocusing lens.

[0052] FIG. 17 is a diagram illustrating a plurality of adjacent light source arrays and a plurality of adjacent re-focusing lenses included in a display device according to one or more embodiments.

[0053] FIG. 18 is a diagram illustrating a light source array, a central re-focusing lens, and an outer re-focusing lens of a display device according to one or more embodiments.

[0054] FIG. 19 is a diagram illustrating a light source array and a central re-focusing lens of a display device according to one or more embodiments.

[0055] FIG. 20 is a diagram illustrating a light source array and an outer re-focusing lens of a display device according to one or more embodiments.

[0056] FIG. 21 is a drawing illustrating a light source array and a re-focusing lens of a display device according to one or more embodiments spaced apart from each other by a predetermined distance.

[0057] FIG. 22 is a diagram illustrating a light source array, a re-focusing lens, and a display panel of a display device according to one or more embodiments.

[0058] The embodiments described in this specification and the configurations illustrated in the drawings are merely examples of the disclosed invention, and there may be various modified examples that can replace the embodiments and drawings of this specification at the time of filing of this application.

[0059] Additionally, the same reference numbers or symbols presented in each drawing of this specification represent parts or components that perform substantially the same function.

[0060] In addition, the terminology used in this specification is used to describe embodiments and is not intended to limit and / or restrict the disclosed invention. The singular expression includes plural expression unless the context clearly indicates otherwise. In this specification, the terms "comprise" or "have" and the like are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0061] Additionally, terms including ordinal numbers such as “first,” “second,” etc. used herein may be used to describe various components, but the components are not limited by the terms, and the terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term “and / or” includes any combination of a plurality of related listed items or any item among a plurality of related listed items.

[0062] The terms 'part, module, element, block' used in the specification may be implemented in software or hardware, and in some embodiments, multiple 'parts, modules, elements, blocks' may be implemented as one component, or one 'part, module, element, block' may include multiple components.

[0063] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the attached drawings.

[0064] In describing various embodiments of the present disclosure with reference to FIGS. 1 to 22, the terms “front-rear direction,” “vertical direction,” “horizontal direction (left-right direction),” etc. used in the following description are defined based on the drawings, and the shape and position of each component are not limited by these terms. For example, the term “front-rear direction” below may mean a direction parallel to the Z direction based on the drawings. For example, the term “vertical direction” below may mean a direction parallel to the Y direction based on the drawings. For example, the term “horizontal direction (left-right direction)” below may mean a direction parallel to the X direction based on the drawings, respectively.

[0065] FIG. 1 is a perspective view of a display device according to one or more embodiments.

[0066] Referring to FIG. 1, a display device (1) according to various embodiments of the present disclosure is a device that can process an image signal received from the outside and visually display the processed image.

[0067] For example, the display device (1) according to various embodiments of the present disclosure can be implemented in various forms such as a television (TV), a monitor which is a type of computer output device, a portable multimedia device, a portable communication device, etc. For example, the display device (1) according to various embodiments of the present disclosure can be a large format display (LFD) installed outdoors such as on a building rooftop or a bus stop. Here, the outdoors is not necessarily limited to outdoors, and for example, the display device (1) according to various embodiments of the present disclosure can be installed in any place where many people can come and go, such as a subway station, a shopping mall, a movie theater, a company, a store, etc. Even indoors. The display device (1) according to various embodiments of the present disclosure is not limited to the type described above as long as it is a device that visually displays an image.

[0068] For example, the display device (1) may be installed in a standing manner on a floor or furniture surface, indoors or outdoors. For example, the display device (1) may be installed on a wall surface or inside a wall of a building or other structure. For example, the display device (1) may be installed on a wall using a wall mount device.

[0069] In FIG. 1, the display device (1) is described as a flat display device with a flat screen as an example, but the embodiments are not limited thereto, and the display device (1) according to various embodiments of the present disclosure may also include a curved display device or a bendable or flexible display device whose flat and curved states can be changed. The configuration of the present disclosure described below can be applied to display devices of various shapes regardless of the screen size or ratio of the display device.

[0070] The display device (1) can receive content including video signals and audio signals from various content sources, and output video and audio corresponding to the video signals and audio signals. For example, the display device (1) can receive content data via a broadcast reception antenna or a wired cable, receive content data from a content playback device, or receive content data from a content provider's content provision server.

[0071] The display device (1) can display an image corresponding to video data and output a sound corresponding to audio data. For example, the display device (1) can restore a plurality of image frames included in the video data and continuously display the plurality of image frames. In addition, the display device (1) can restore an audio signal included in the audio data and continuously output a sound according to the audio signal.

[0072] The display device (1) may include a screen (S) configured to display an image. The screen (S) may be provided on one side of the display device (1). The side on which the screen (S) is provided may be defined as the front side of the display device (1). The screen (S) may be provided on the front side of the display device (1). The screen (S) may be configured to display an image in the front. For example, the screen (S) may display a still image or a moving image. For example, the screen (S) may display a two-dimensional planar image or a three-dimensional stereoscopic image.

[0073] A plurality of pixels (P) can be formed on a screen (S). An image displayed on the screen (S) can be formed by light emitted from each of the plurality of pixels (P). For example, an image can be formed on the screen (S) by combining the light emitted from the plurality of pixels (P) like a mosaic.

[0074] Each of the plurality of pixels (P) can emit light of different brightness and different colors. For example, each of the plurality of pixels (P) can be divided into sub-pixels (P R , P G , P B ) may include sub-pixels (P R , P G , P B ) is a red sub-pixel (P) that can emit red light. R ), a green sub-pixel (P) capable of emitting green light G ) and blue sub-pixels (P) capable of emitting blue light. B ) can include. For example, red light can refer to light with a wavelength of approximately 620 nm (nanometer, one billionth of a meter) to 750 nm, green light can refer to light with a wavelength of approximately 495 nm to 570 nm, and blue light can refer to light with a wavelength of approximately 450 nm to 495 nm.

[0075] Red subpixel (P R ), green subpixel (P G ) and blue subpixel (P B ) Each of the plurality of pixels (P) can emit light of various brightness and color by combining the light emitted from each pixel.

[0076] For example, the screen (S) of the display device (1) may have an approximately rectangular shape. The screen (S) may have a first side (s1) and a second side (s2). The screen (S) may have a rectangular shape having a pair of first sides (s1) that are parallel to each other and a pair of second sides (s2) that are parallel to each other.

[0077] For example, the first side (s1) of the screen (S) may be a side parallel to the horizontal direction (X), and the second side (s2) of the screen (S) may be a side parallel to the vertical direction (Y). For example, the first side (s1) of the screen (S) may be a long side, and the second side (s2) of the screen (S) may be a short side. As illustrated in FIG. 1, the screen (S) may have a long side parallel to the horizontal direction (X) (e.g., the first side (s1)) and a short side parallel to the vertical direction (Y) (e.g., the second side (s2)), but is not limited thereto, and the screen (S) of the display device (1) according to various embodiments of the present disclosure may have a long side parallel to the vertical direction (Y) and a short side parallel to the horizontal direction (X). As another example, the screen (S) of the display device (1) according to various embodiments of the present disclosure may be provided in a square shape in which the lengths of the first side (s1) and the second side (s2) are almost equal. As another example, the screen (S) of the display device (1) according to various embodiments of the present disclosure may have various shapes, such as various types of polygons or circles, in addition to the rectangular shape.

[0078] FIG. 2 is a diagram illustrating an image provided from a display device at multiple viewpoints according to one or more embodiments.

[0079] Referring to FIG. 2, a display device (1) according to one embodiment of the present disclosure may be configured to provide different images to viewpoints (V) viewing a screen (S). The display device (1) may be configured to display different images depending on the viewpoint through the screen (S). The display device (1) may utilize an auto-stereoscopy method that provides different images depending on the viewpoint by separating a plurality of different images and displaying them on the screen (S).

[0080] A display device (1) may be configured to provide a plurality of different images to a plurality of viewpoints (V). The viewpoint (V) is formed in an area (hereinafter referred to as a “viewing area”) located a predetermined distance (d) in front (Z) from a screen (S), and may be defined as a point for a viewer to view an image displayed on the screen (S). The viewing area may be divided into a plurality of viewpoints, and the plurality of viewpoints (V) may be arranged in one direction along the viewing area.

[0081] Hereinafter, the front direction in which the screen (S) displays an image is defined as the “first direction (Z)”, and the direction in which a plurality of viewpoints (V) are arranged is defined as the “second direction (X)”. The first direction (Z) may be parallel to the direction in which the light source array (20) described below emits light. The second direction (X) may be different from the first direction (Z). For example, the second direction (X) may be perpendicular to the first direction (Z), but is not limited thereto, and the angle between the first direction (Z) and the second direction (X) may not be perpendicular. For example, the second direction (X) may be parallel to the first side (s1) of the screen (S). For example, the second direction (X) may be parallel to the long side of the screen (S). As another example, for example, the second direction (X) may be parallel to the short side of the screen (S). For example, the second direction (X) may be parallel to the horizontal direction of the display device (1) that is parallel to the ground. As another example, for example, the second direction (X) may be parallel to the vertical direction of the display device (1) that is perpendicular to the ground.

[0082] Hereinafter, a direction different from the first direction (Z) and the second direction (X) is defined as a third direction (Y). For example, the third direction (Y) may be perpendicular to the first direction (Z) and the second direction (X), but is not limited thereto, and the third direction (Y) may not be perpendicular to the first direction (Z) or the second direction (X). Although the drawings illustrate an embodiment in which the third direction (Y) is parallel to the short side of the screen (S) and parallel to the vertical direction of the display device (1), various embodiments of the present disclosure are not limited thereto.

[0083] The properties of light emitted from a display device (1) can be defined by a light field. A light field can be defined as a function representing the direction and intensity of light propagation at all points in three-dimensional space. The display device (1) can control the light field of light emitted from a screen (S) so that only a specific image is visible at a specific point among a plurality of points of view (V). By allowing only a specific image to be visible at a specific point of view, different images can be provided to each of the plurality of points of view.

[0084] For example, referring to FIG. 2, light (L1a) traveling from a first point (P1) on a screen (S) to a first time point (VA), light (L2a) traveling from the first point (P1) to a second time point (VB), light (L3a) traveling from the first point (P1) to a third time point (VC), and light (L4a) traveling from the first point (P1) to a fourth time point (VD) can provide different images. The combination of sub-pixels that provide light (L1a) from a first point (P1) on the screen (S) toward a first viewpoint (VA), the combination of sub-pixels that provide light (L2a) from the first point (P1) toward a second viewpoint (VB), the combination of sub-pixels that provide light (L3a) from the first point (P1) toward a third viewpoint (VC), and the combination of sub-pixels that provide light (L4a) from the first point (P1) toward a fourth viewpoint (VD) may be different from each other. For example, a viewer can perceive different images when looking at a first point (P1) on a screen (S) from a first viewpoint (VA), when looking at the first point (P1) on the screen (S) from a second viewpoint (V2), when looking at the first point (P1) on the screen (S) from a third viewpoint (V3), and when looking at the first point (P1) on the screen (S) from a fourth viewpoint (V4). The first point (P1) illustrated in Fig. 2 is an example of a point approximately adjacent to the center of the screen (S) in the second direction (X), but is not limited thereto.

[0085] Similarly, for example, referring to FIG. 2, light (L1b) traveling from a second point (P2) on the screen (S) to a first time point (VA), light (L2b) traveling from a second point (P2) to a second time point (VB), light (L3b) traveling from the second point (P2) to a third time point (VC), and light (L4b) traveling from the second point (P2) to a fourth time point (VD) can provide different images. The combination of sub-pixels that provide light (L1b) from a second point (P2) on the screen (S) toward a first viewpoint (VA), the combination of sub-pixels that provide light (L2b) from a second point (P2) toward a second viewpoint (VB), the combination of sub-pixels that provide light (L3b) from the second point (P2) toward a third viewpoint (VC), and the combination of sub-pixels that provide light (L4b) from the second point (P2) toward a fourth viewpoint (VD) may be different from each other. For example, a viewer can perceive different images when looking at a second point (P2) on the screen (S) from a first viewpoint (VA), when looking at the second point (P2) on the screen (S) from a second viewpoint (V2), when looking at the second point (P2) on the screen (S) from a third viewpoint (V3), and when looking at the second point (P2) on the screen (S) from a fourth viewpoint (V4). The second point (P2) illustrated in Fig. 2 is an example of a point adjacent to the edge of the screen (S) in the second direction (X), but is not limited thereto.

[0086] This allows the viewer to perceive that different images are displayed on the screen (S) depending on the viewpoint (V). In order to provide a plurality of different images to a plurality of viewpoints (V) as described above, the display device (1) according to one embodiment of the present disclosure may include a multi-viewpoint lens (100, see FIGS. 3 and 5, etc.) configured to separate light emitted from a light source (30, see FIG. 4, etc.) and provide the light to each viewpoint (V). The multi-viewpoint lens (100) may also be referred to as a “lenticular lens.” A detailed description thereof will be provided later.

[0087] In the above, the city area is divided into four viewpoints (VA, VB, VC, VD) as an example, but this is for convenience of explanation and illustration, and in various embodiments of the present disclosure, the city area may be divided into a different number of viewpoints.

[0088] According to one embodiment of the present disclosure, the display device (1) can be configured to provide images from points spaced apart from each other on the screen (S) to each of a plurality of viewpoints (V). For example, the viewpoints (VA, VB, VC, VD) at which light (L1a, L2a, L3a, L4a) from a first viewpoint (P1) arrives and the viewpoints (VA, VB, VC, VD) at which light (L1a, L2a, L3a, L4a) from a second viewpoint (P2) arrives may coincide with each other. As a result, the area of ​​the plurality of viewpoints (V) provided by the display device (1) can be expanded, and for example, the display device (1) can provide a wider viewing area.

[0089] Hereinafter, the configurations of a display device (1) for providing different images at multiple viewpoints (V) and providing a wider field of view will be described in detail with reference to various embodiments of the present disclosure.

[0090] FIG. 3 is an exploded perspective view illustrating components of a display device according to one or more embodiments. FIG. 4 is a drawing illustrating a light source array of a display device and light sources included therein according to one or more embodiments.

[0091] Referring to FIGS. 3 and 4, a display device (1) according to one embodiment of the present disclosure may include a case (10) that supports various components of the display device (1). Various components of the display device (1) may be accommodated in the case (10). The case (10) may form the exterior of the display device (1).

[0092] For example, the case (10) can support a light source array (20). For example, the case (10) can support a re-focusing lens (100). For example, the case (10) can support an optical sheet (40). For example, the case (10) can support a board assembly (50).

[0093] The case (10) may include a front chassis (11). For example, the front chassis (11) may support a front or side edge of the light source array (20). For example, the front chassis (11) may have a shape of an approximately square frame.

[0094] The case (10) may include a rear chassis (12). For example, the rear chassis (12) may cover the rear of the light source array (20). For example, the rear chassis (12) may support the rear of the light source array (20). For example, the rear chassis (12) may support the board assembly (50). For example, the rear chassis (12) may have a substantially flat plate shape, but its shape is not limited thereto.

[0095] A display device (1) may include a light source array (20) configured to emit light. The light source array (20) may be configured to emit light in a first direction (Z). The light source array (20) may be configured to emit light for providing an image.

[0096] For example, the light source array (20) may have a shape roughly equivalent to a rectangular plate. For example, the light source array (20) may have a shape roughly corresponding to the screen (S).

[0097] For example, the light source array (20) may have a first side (21) and a second side (22). The light source array (20) may have a pair of first sides (21) that are parallel to each other and a pair of second sides (22) that are parallel to each other. For example, the first side (21) of the light source array (20) may be parallel to the second direction (X). For example, the second side (22) of the light source array (20) may be parallel to the third direction (Y). For example, the first side (21) of the light source array (20) may be parallel to the direction in which a plurality of viewpoints (V) are divided and arranged from each other (see FIG. 2).

[0098] For example, the first side (21) of the light source array (20) may be parallel to the long side of the screen (S). As another example, for example, the first side (21) of the light source array (20) may be parallel to the short side of the screen (S). As another example, the first side (21) of the light source array (20) may be parallel to the horizontal direction of the display device (1). Alternatively, for example, the first side (21) of the light source array (20) may be parallel to the vertical direction of the display device (1).

[0099] The light source array (20) may include a plurality of light sources (30). Each of the plurality of light sources (30) may be arranged to emit light in approximately the same direction. Each of the plurality of light sources (30) may be arranged to emit light in a first direction (Z). The light source array (20) may be formed by arranging the plurality of light sources (30) at a constant interval. The intervals between the plurality of light sources (30) may be uniform or non-uniform. For example, the light source array (20) may include a plurality of light sources (30) arranged in a plurality of rows and a plurality of columns. The rows of the light sources (30) may be an array extending in a second direction (X). The columns of the light sources (30) may be an array extending in a third direction (Y).

[0100] For example, the light source (30) may include a light emitting diode (LED) element (hereinafter referred to as “LED”). In the light source array (20), a plurality of LEDs (30) may be arranged in a plurality of rows and a plurality of columns.

[0101] A combination of a predetermined number of light sources (30) arranged adjacent to each other among a plurality of light sources (30) can correspond to each pixel (P) of the screen (S). A predetermined number of light sources (30) arranged adjacent to each other among a plurality of light sources (30) can form each pixel (P) of the screen (S), and the plurality of light sources (30) can form an image as a whole.

[0102] The light source array (20) may include a light source substrate (25) on which a plurality of light sources (30) are mounted. The light source substrate (25) may include a circuit to which the plurality of light sources (30) are electrically connected. The plurality of light sources (30) may receive a driving current through the circuit of the light source substrate (25). For example, the light source substrate (25) may have an approximately rectangular plate shape. The light source substrate (25) on which the entire light source (30) is mounted may be provided as an integral body, or may be provided as a plurality of light source substrates (25) that are separate from each other.

[0103] A display device (1) according to one embodiment of the present disclosure may include a self-luminous display device that can independently display an image by using a light source array (20) of a plurality of LEDs as light sources (30). In addition, the light source array (20) of the display device (1) may include various types of display panels, such as a self-luminous panel such as an organic light-emitting diode (OLED) or micro-LED panel, or a light-emitting panel such as a liquid crystal display (LCD) panel. If the light source array (20) is a light-emitting display panel such as an LCD panel, each portion of a pixel formed on the display panel (e.g., a sub-pixel) may be defined as a light source (30).

[0104] The light source array (20) may be arranged to emit light to provide different images at multiple viewpoints. Some of the plurality of light sources (30) may be combined with each other to emit light to provide a specific image (referred to as a first image) at a specific viewpoint (referred to as a first viewpoint) among the plurality of viewpoints (V), and other some of the plurality of light sources (30) may be combined with each other to emit light to provide a specific image (referred to as a second image) different from the first image at a specific viewpoint (referred to as a second viewpoint) different from the first viewpoint among the plurality of viewpoints (V).

[0105] The number of the plurality of light sources (30) may be equal to or greater than the number of the plurality of viewpoints (V) included in the entire field of view. The number of columns of the plurality of light sources (30) may be equal to or greater than the number of the plurality of viewpoints (V) included in the entire field of view. The number of the light sources (30) included in one row may be equal to or greater than the number of the plurality of viewpoints (V) included in the entire field of view.

[0106] The display device (1) may include a multi-view lens (100) so that the light emitted from each of the plurality of light sources (30) may be directed toward each of the predetermined time points (V). The multi-view lens (100) may be arranged in a first direction (Z) (i.e., forward) of the light source array (20). The multi-view lens (100) may be arranged in each of the plurality of light sources (30) in the first direction (Z). The multi-view lens (100) may be configured to direct the light emitted from each of the plurality of light sources (30) toward each of the predetermined time points (V). The multi-view lens (100) may change the path of the light emitted from each of the plurality of light sources (30) so that the light may be emitted toward each of the predetermined time points (V).

[0107] A detailed description of the structure and function of the refocusing lens (100) will be provided later.

[0108] The display device (1) may include an optical sheet (40). The optical sheet (40) may be disposed between the light source array (20) and the re-viewing lens (100). The optical sheet (40) may be disposed in a first direction (Z) of the light source array (20). The optical sheet (40) may be arranged to control the characteristics of light emitted from the light source array (20). For example, the optical sheet (40) may be arranged to limit the angular range of light traveling from the light source array (20) toward the re-viewing lens (100).

[0109] A detailed description of the structure and function of the optical sheet (40) will be described later.

[0110] The display device (1) may include various board assemblies (50). Electronic components may be mounted on the board assembly (50), and a circuit including the electronic components may be provided on the board assembly (50). For example, the circuit of the board assembly (50) may be formed by printing a conductive material such as copper (Cu) in a circuit line pattern on an electrically insulating substrate. The board assembly (50) may be provided to control various components for performing the functions of the display device (1), such as the light source array (20), and to supply power to the components.

[0111] The board assembly (50) may include various circuit boards such as a main board, a power supply board, and a source board.

[0112] For example, the main board can control the overall operation of the display device (1). The main board can include a processor and a power management device for driving the display device (1). The main board can include a control circuit for controlling components such as a light source array (20), a communication module, and a content receiving unit for receiving content data from content sources.

[0113] For example, a power supply board may be provided to supply power to various components of a display device (1). The power supply board (60) may include a Switched Mode Power Supply (SMPS) board. The power supply board (60) may include a power supply circuit for supplying power to components such as a light source array (20).

[0114] For example, the source board can control the light source array (20). The source board can control the operation of each of the plurality of light sources (30) by transmitting a driving signal to the light source array (20). The source board can include a control circuit for controlling the light source array (20).

[0115] The circuit boards of the board assembly (50), such as the main board, power supply board, and source board, may be arranged independently of each other or may be arranged in a merged manner. When the circuit boards are arranged independently of each other, the circuit boards may be electrically connected to each other to transmit and receive data, signals, or power. For example, the circuit boards of the board assembly (50) may be electrically connected to each other by cables to perform a function for driving the display device (1). The cables may include various types of cables, such as film cables, flexible flat cables (FFCs), and flexible printed circuit boards (FPCBs).

[0116] The display device (1) may include a cable for transmitting image data from a board assembly (50) to a light source array (20), a display driver integrated circuit (DDI) for processing digital image data and outputting an analog image signal, etc.

[0117] The configurations of the display device (1) described above with reference to FIGS. 3 and 4 are merely examples of configurations that the display device (1) according to one embodiment of the present disclosure may include, and the present disclosure is not limited thereto. The display device (1) according to various embodiments of the present disclosure may include various configurations for performing various functions of the display device (1).

[0118] FIG. 5 is an exploded view of a light source array, a multi-view lens, and an optical sheet of a display device according to one or more embodiments. FIG. 6 is an enlarged view of a light source array and a multi-view lens of a display device according to one or more embodiments. FIG. 7 is an enlarged view of a light source array and a multi-view lens of a display device according to one or more embodiments.

[0119] Referring to FIGS. 5 to 7, a display device (1) according to one embodiment of the present disclosure may include a light source array (20) including a plurality of light sources (30) and a multi-view lens (100) configured to change the direction of propagation of light emitted from the light source array (20) and emit light to a predetermined point in time among a plurality of points in time (V).

[0120] The re-pointing lens (100) may be arranged in the first direction (Z) of the light source array (20). For example, the re-pointing lens (100) may be arranged adjacent to the front of the light source array (20). For example, the re-pointing lens (100) may be attached to the front of the light source array (20). For example, an optical sheet (40) may be provided between the light source array (20) and the re-pointing lens (100), and the re-pointing lens (100) may be attached to the front of the optical sheet (40) or may be arranged at a position adjacent thereto. For example, the incident surface (101) of the re-pointing lens (100) onto which light from the light source array (20) is incident may be attached to the front of the optical sheet (40) or may be arranged at a position adjacent thereto. In an embodiment where no optical sheet (40) is provided between the re-focusing lens (100) and the light source array (20), the incident surface (101) of the re-focusing lens (100) may be attached to the front surface of the light source array (20) or may be positioned adjacent thereto.

[0121] For example, the re-focusing lens (100) may be fixed to the light source array (20) using an adhesive or a screw, etc. For example, the re-focusing lens (100) may be fixed to the optical sheet (40) using an adhesive or a screw, etc. In addition, the re-focusing lens (100), the optical sheet (40), and the light source array (20) may be fixed to each other in various ways.

[0122] As illustrated in FIG. 5, a plurality of re-pointing lenses (100) may be provided. The plurality of re-pointing lenses (100) may each be arranged in a first direction (Z) of the light source array (20). The plurality of re-pointing lenses (100) may be arranged in a second direction (X) with respect to each other. Each of the plurality of re-pointing lenses (100) may be provided to emit light incident from the plurality of light sources (30) to a predetermined point of view (V) among the plurality of point of view (V).

[0123] Each of the plurality of multi-point lenses (100) may extend in a third direction (Y) that is different from the first direction (Z) and the second direction (X). For example, the third direction (Y) may be perpendicular to the first direction (Z) and the second direction (X). If the plurality of multi-point lenses (100) are arranged in a horizontal direction of the display device (1), each of the plurality of multi-point lenses (100) may extend in a vertical direction. If the plurality of multi-point lenses (100) are arranged in a vertical direction of the display device (1), each of the plurality of multi-point lenses (100) may extend in a horizontal direction. If the plurality of multi-point lenses (100) are arranged in a long-side direction of the display device (1), each of the plurality of multi-point lenses (100) may extend in a short-side direction of the display device (1). If multiple re-point lenses (100) extend in the short-side direction of the display device (1), each of the multiple re-point lenses (100) can extend in the long-side direction of the display device (1).

[0124] As another example, each of the plurality of multi-view lenses (100) may extend in a direction different from the first direction (Z) and the second direction (X), but the direction may not be perpendicular to the first direction (Z) and the second direction (X). For example, each of the plurality of multi-view lenses (100) may extend in a direction inclined with respect to the direction perpendicular to the first direction (Z) and the second direction (X). If the plurality of multi-view lenses (100) are arranged in a horizontal direction of the display device (1), each of the plurality of multi-view lenses (100) may extend in a direction inclined with respect to the vertical direction. If the plurality of multi-view lenses (100) are arranged in a vertical direction of the display device (1), each of the plurality of multi-view lenses (100) may extend in a direction inclined with respect to the horizontal direction. If a plurality of re-pointing lenses (100) are arranged in the long-side direction of the display device (1), each of the plurality of re-pointing lenses (100) can extend in a direction inclined with respect to the short-side direction of the display device (1). If a plurality of re-pointing lenses (100) are arranged in the short-side direction of the display device (1), each of the plurality of re-pointing lenses (100) can extend in a direction inclined with respect to the long-side direction of the display device (1).

[0125] For example, multiple re-focusing lenses (100) can be extended in a direction parallel to each other.

[0126] Hereinafter, the structure of one of the multiple re-point lenses (100) and the corresponding light source array (20) will be described in detail with reference to FIGS. 6 and 7.

[0127] The light source array (20) may include a plurality of light sources (30) arranged in a second direction (X) with respect to each other. The light source array (20) may include a first light source (31) and a second light source (32) arranged in a second direction (X) of the first light source (31). The first light source (31) and the second light source (32) may be arranged in the second direction (X) with respect to each other. The terms “first light source (31)” and “second light source (32)” described below may each mean a single light source element (e.g., an LED element), but are not limited thereto, and “first light source (31)” may mean one or more first light sources (31) and “second light source (32)” may mean one or more second light sources (32). For example, the first light source (31) may include a plurality of first light sources (31) arranged in the second direction (X) with respect to each other. For example, the first light source (31) may include a plurality of first light sources (31) arranged in a third direction (Y) with respect to each other. For example, the second light source (32) may include a plurality of second light sources (32) arranged in a second direction (X) with respect to each other. For example, the second light source (32) may include a plurality of second light sources (32) arranged in a third direction (Y) with respect to each other.

[0128] The first light source (31) may be arranged to emit light to provide an image at a first point (V1) among a plurality of points (V). For example, the first point (V1) may be located adjacent to the center of the plurality of points (V).

[0129] The second light source (32) may be arranged to emit light to provide an image at a second point (V2) among the plurality of points (V). The second point (V2) may be arranged in the second direction (X) of the first point (V1). For example, the second point (V2) may be positioned closer to the edge of the plurality of points (V) than the first point (V1). For example, the second point (V2) may be positioned further from the center of the plurality of points (V) than the first point (V1).

[0130] The first time point (V1) and the second time point (V2) can be separated from each other. The first time point (V1) and the second time point (V2) can be separated from each other in the visual field and arranged in the second direction (X).

[0131] The re-focusing lens (100) may be arranged to emit light emitted from the first light source (31) to the first point of view (V1). The re-focusing lens (100) may include a refracting part (110) arranged to emit light emitted from the first light source (31) to the first point of view (V1).

[0132] The refracting unit (110) may be provided to refract light from the first light source (31). Light emitted from the first light source (31) may be incident on the refracting unit (110) through the incident surface (101) of the multi-point lens (100) and may be refracted while passing through the refracting unit (110). The light passing through the refracting unit (110) may be emitted through the exit surface (111) of the refracting unit (110) and may proceed to the first time point (V1). For example, the refracting unit (110) may be provided to refract light from the first light source (31) and cause it to proceed to the first time point (V1) among a plurality of time points (V).

[0133] The refracting member (110) may include various materials having a predetermined refractive index. The refracting member (110) may also be referred to as a “refractive lens (110).”

[0134] For example, the exit surface (111) of the refracting portion (110) may have a convex curve in the first direction (Z). However, this is not limited thereto, and the exit surface (111) may have various shapes that allow light transmitted through the refracting portion (110) to be refracted and proceed to the first point (V1).

[0135] The refracting unit (110) may be arranged in the first direction (Z) of the first light source (31). The refracting unit (110) may be arranged to refract light emitted from the first light source (31) in the first direction (Z). In addition to the light emitted from the first light source (31) in the first direction (Z), the refracting unit (110) may also refract light emitted in a direction similar to the first direction (Z) and cause it to advance to the first time point (V1).

[0136] The refracting member (110) can be placed adjacent to the first light source (31).

[0137] As described above, the light emitted from the second light source (32) can pass through the multi-point lens (100) and proceed to the second viewpoint (V2). In one embodiment, if the multi-point lens (100) is configured so that the light emitted from the second light source (32) changes its path and proceeds only through refraction, the degree to which the path of the light is changed may not be sufficiently large, and there may be a limit to the distance at which the second viewpoint (V2) can be spaced from the center of the entire field of view. In such an embodiment, the range of the entire field of view of the display device (1) may not be sufficiently wide. As the amount of light that must proceed from the center of the field of view to a viewpoint located outside increases, the path of the light whose angle must be changed by the multi-point lens (100) increases. However, in an embodiment that uses only the refraction of the light, there is a limit to the angle at which the light propagates, so the width of the plurality of viewpoints (V) or the width of the entire field of view may become narrow.

[0138] In one example, even if multiple re-viewing lenses are arranged to provide multiple viewpoints, if each re-viewing lens only uses the refraction of light, the display device (1) may not provide a wide field of view overall, but may only repeatedly provide a narrow field of view.

[0139] In one example, the curvature of the multi-point lens may be formed to be relatively large (i.e., the radius of curvature may be relatively small) in order to increase the angle of refraction of light by the multi-point lens. However, in this case, the central thickness of the multi-point lens increases due to the relatively small radius of curvature, which has the disadvantage that aberrations are expected to increase. In addition, because the radius of curvature of the multi-point lens is small, light incident on the area adjacent to the edge of the multi-point lens may not be able to pass through the multi-point lens and may be totally reflected back toward the light source (30). In this case, noise may be generated in the image and the image quality may be lowered (crosstalk of the image may be increased) as the light passes through another adjacent multi-point lens, the amount of light passing through the multi-point lens may be reduced, the full width at half maximum (FWHM) of the transmitted light may be limited, and the brightness of the screen (S) may be lowered.

[0140] To solve the above problem, according to one embodiment, the re-focusing lens (100) may include a reflector (120). The reflector (120) may be arranged to project light emitted from the second light source (32) toward the second viewpoint (V2). The reflector (120) may be arranged to reflect light emitted from the second light source (32). The reflector (120) may be arranged to reflect light from the second light source (32) and direct it toward the second viewpoint (V2).

[0141] The reflector (120) may be arranged in the first direction (Z) of the second light source (32). The reflector (120) may be arranged to reflect light emitted from the second light source (32) in the first direction (Z). In addition to the light emitted from the first light source (31) in the first direction (Z), the reflector (120) may also reflect light emitted in a direction similar to the first direction (Z) and allow it to advance to the second time point (V2).

[0142] The reflector (120) may be arranged to reflect light emitted from the second light source (32) so as to intersect the lens axis (LL). For example, the lens axis (LL) may be an axis passing through the focus (F) of the refracting portion (110) in the first direction (Z). For example, the lens axis (LL) may be an optical axis of the refracting portion (110). The distance from the re-pointing lens (100) to the point where the light emitted from the reflector (120) intersects the lens axis (LL) may be shorter than the distance from the re-pointing lens (100) to the focus (F) of the refracting portion (110).

[0143] The above focus (F) can be defined as a point where light passing through the refracting portion (110) in the first direction (Z) intersects. For example, as illustrated in FIGS. 6 and 7, the first light source (31) may include a first central light source (31a) and a second central light source (31b) which are arranged in the second direction (X) with respect to each other. Light emitted from the first central light source (31a) and light emitted from the second central light source (31b) may each enter the refracting portion (110) through the incident surface (101), be refracted while passing through the refracting portion (110), and be emitted through the exit surface (111) of the refracting portion (110). For example, a first point of view (V1) may include a first central point of view (V12) and a second central point of view (V11) which are arranged in a second direction (X) relative to each other, and light from a first central light source (31a) may be refracted by a refracting member (110) and may proceed to the first central point of view (V12), and light from a second central light source (31b) may be refracted by a refracting member (110) and may proceed to the second central point of view (V11). Light emitted from the first central light source (31a) in the first direction (Z) and transmitted through the refracting member (110) and light emitted from the second central light source (31b) in the first direction (Z) and transmitted through the refracting member (110) may intersect at a focus (F).

[0144] When light emitted from a first light source (31), passes through a refracting portion (110), and travels to a first point in time (V1), is referred to as first light, and light emitted from a second light source (32), is reflected by a reflecting portion (120), and travels to a second point in time (V2), is referred to as second light, the first light and the second light may intersect each other. However, the first light at the first point in time (V1) and the second light at the second point in time (V2) may not overlap each other, and the first point in time (V1) and the second point in time (V2) may be separated from each other.

[0145] The angle at which the direction in which the second light emitted from the reflector (120) travels is inclined with respect to the first direction (Z) (i.e., the front-back direction of the light source array (20)) may be greater than the angle at which the direction in which the first light emitted from the refractor (110) travels is inclined with respect to the first direction (Z). For example, the angle at which light incident on the reflector (120) in the first direction (Z) is reflected may be greater than the angle at which light incident on the refractor (110) in the first direction (Z) is refracted.

[0146] In this way, since the reflector (120) utilizes light reflection, the direction of light propagation can be changed to a larger angle compared to a case where only light refraction is utilized. As the light from the second light source (32) is bent at a large angle and propagates by the reflector (120), the width of multiple viewpoints (V) can relatively increase.

[0147] The reflector (120) may also be referred to as a “reflector (120).”

[0148] The reflective portion (120) may include a reflective surface (121) configured to reflect light. The reflective surface (121) may be configured to reflect light from the second light source (32) toward the second viewpoint (V2). The reflective surface (121) may be inclined with respect to the first direction (Z). For example, the reflective surface (121) may be inclined with respect to the first direction (Z) so as to come closer to the lens axis (LL) in the second direction (X) as the distance from the second light source (32) increases. For example, the reflective surface (121) may be extended so as to come closer to the lens axis (LL) in the second direction (X) as the distance from the incident surface (101) of the multi-view lens (100) increases. For example, the reflective surface (121) may be extended so as to come closer to the refracting portion (110) in the second direction (X) as the distance from the second light source (32) increases.

[0149] For example, the reflective surface (121) may have a curved surface. For example, the reflective surface (121) may have a convex curved surface in the outer direction of the re-focusing lens (100). For example, the reflective surface (121) may have a curved surface whose angle of inclination with respect to the first direction (Z) increases as the distance in the second direction from the second light source (32) increases.

[0150] According to one embodiment, the reflector (120) may be configured to have a predetermined refractive index. The reflector (120) may include a material having a predetermined refractive index that is filled between the incident surface (101) and the reflective surface (121). Light emitted from the second light source (32) may be incident on the reflector (120) through the incident surface (101) of the multi-view lens (100) and may be totally reflected by the reflective surface (121) while traveling within the reflector (120). That is, the reflector (121) may be arranged to totally reflect the light traveling from the second light source (32) to the reflector (120). Parameters such as the refractive index of the material included in the reflector (120) and the inclination angle of the reflective surface (121) may be appropriately set so that the light from the second light source (32) may be totally reflected and travel toward the second viewpoint (V2).

[0151] The reflective portion (120) may further include a refracting surface (122). The refracting surface (122) may be positioned at a position where light reflected by the reflective portion (121) proceeds. The refracting surface (122) may be provided to refract the light reflected by the reflective portion (121) at a predetermined angle. For example, light emitted from the second light source (32) may be incident on the reflective portion (120) through the incident surface (101) of the multi-view lens (100), and may be refracted while being emitted through the refracting surface (122) after being reflected by the reflective portion (121). The light emitted from the refracting surface (122) may proceed to the second viewpoint (V2).

[0152] For example, the refracting surface (122) can refract light so that the angle at which the light reflected by the reflecting surface (121) propagates with respect to the first direction (Z) becomes smaller.

[0153] The direction in which the refractive surface (122) is arranged can be appropriately set so that the light reflected by the reflective surface (121) can proceed toward the second time point (V2).

[0154] However, embodiments are not limited thereto, and for example, a surface from which light reflected by the reflective surface (121) is emitted from the reflective portion (120) toward the second viewpoint (V2) may be configured so as not to substantially refract the light.

[0155] The reflector (120) may be positioned adjacent to the second light source (32). The reflector (120) may be positioned in the first direction (Z) of the second light source (32).

[0156] The reflective portion (120) may be arranged adjacent to the refracting portion (110). The reflective portion (120) may be arranged in the second direction (X) of the refracting portion (110). The refracting portion (110) and the reflective portion (120) may be arranged relative to each other in the second direction (X).

[0157] The reflector (120) may be connected to the refracting unit (110). For example, the reflector (120) may be formed integrally with the refracting unit (110). For example, the re-focusing lens (100) may be formed as an integral lens. However, this is not limited thereto, and the reflector (120) and the refracting unit (110) may be provided as separate components.

[0158] According to one embodiment, as illustrated in FIGS. 6 and 7, the second light source (32) may include a first edge light source (32a) and a second edge light source (32b) that are spaced apart from each other. The first edge light source (32a) and the second edge light source (32b) may be spaced apart from each other in the second direction (X). The first light source (31) may be arranged between the first edge light source (32a) and the second edge light source (32b). The first central light source (31a) and the second central light source (31b) may be arranged between the first edge light source (32a) and the second edge light source (32b). The first edge light source (32a) may be arranged on one side in the second direction (X) from the first light source (31). The second edge light source (32b) may be arranged on the other side opposite the first edge light source (32a) in the second direction (X) from the first light source (31). For example, the first edge light source (32a) may be arranged on one side opposite the first central light source (31a) in the second direction (X), and the second edge light source (32b) may be arranged on the other side opposite the first edge light source (32a) and / or the first central light source (31a) in the second direction (X) from the second central light source (31b).

[0159] The reflective portion (120) may include a first reflective portion (120a) configured to reflect light emitted from a first edge light source (32a). The light emitted from the first edge light source (32a) may be incident on the first reflective portion (120a) through the incident surface (101) and then reflected by the reflective surface (121) of the first reflective portion (120a). For example, the light reflected by the reflective surface (121) may be emitted and refracted through the refracting surface (122) of the first reflective portion (120a).

[0160] The first reflector (120a) can be placed on one side in the second direction (X) from the refractor (110).

[0161] The first reflector (120a) can be placed in the first direction (Z) of the first edge light source (32a).

[0162] The reflector (120) may include a second reflector (120b) configured to reflect light emitted from a second edge light source (32b). The light emitted from the second edge light source (32b) may be incident on the second reflector (120b) through the incident surface (101) and then reflected by the reflective surface (121) of the second reflector (120b). For example, the light reflected by the reflective surface (121) may be emitted and refracted through the refractive surface (122) of the second reflector (120b).

[0163] The second reflector (120b) may be arranged on the other side opposite to the first reflector (120a) in the second direction (X) from the refracting portion (110). A refracting portion (110) may be arranged between the first reflector (120a) and the second reflector (120b).

[0164] The second reflector (120b) can be placed in the first direction (Z) of the second edge light source (32b).

[0165] The second viewpoint (V2) may include a first edge viewpoint (V22) and a second edge viewpoint (V21). The first edge viewpoint (V22) and the second edge viewpoint (V21) may be spaced apart from each other in the second direction (X). The first viewpoint (V1) may be disposed between the first edge viewpoint (V22) and the second edge viewpoint (V21). The first central viewpoint (V12) and the second central viewpoint (V11) may be disposed between the first edge viewpoint (V22) and the second edge viewpoint (V21). The first edge viewpoint (V22) may be disposed in the second direction (X) from the first viewpoint (V1). The second edge viewpoint (V21) may be disposed on the other side opposite to the first edge viewpoint (V22) in the second direction (X) from the first viewpoint (V1). For example, the first edge viewpoint (V22) may be positioned on one side in the second direction (X) from the first center viewpoint (V12), and the second edge viewpoint (V21) may be positioned on the other side opposite to the first edge viewpoint (V22) and / or the first center viewpoint (V12) in the second direction (X) from the second center viewpoint (V11).

[0166] The first reflector (120a) may be provided to reflect light emitted from the first edge light source (32a) toward the first edge viewpoint (V22). The first reflector (120a) may be provided to reflect light emitted from the first edge light source (32a) so as to intersect the lens axis (LL). The light from the first edge light source (32a) may have its path changed by the first reflector (120a) and may proceed toward the first edge viewpoint (V22).

[0167] The second reflector (120b) may be provided to reflect the light emitted from the second edge light source (32b) toward the second edge viewpoint (V21). The second reflector (120b) may be provided to reflect the light emitted from the second edge light source (32b) so as to intersect the lens axis (LL). The light from the second edge light source (32b) may have its path changed by the second reflector (120b) and may proceed toward the second edge viewpoint (V21).

[0168] The reflective surface (121) of the first reflective portion (120a) and the reflective surface (121) of the second reflective portion (120b) may each be inclined with respect to the first direction (Z). The reflective surface (121) of the first reflective portion (120a) and the reflective surface (121) of the second reflective portion (120b) may be arranged so that they become closer to each other in the second direction (X) as the distance from the light source (30) in the first direction (Z) increases.

[0169] By this configuration, in various embodiments of the present disclosure, the re-focusing lens (100) can emit light from the light source array (20) over a wider angular range, and the display device (1) can provide a wider field of view.

[0170] In FIGS. 6 and 7, an embodiment is illustrated in which the light source array (20) includes four light sources (30) of a first central light source (31a), a second central light source (31b), a first edge light source (32a), and a second edge light source (32b), and the plurality of viewpoints (V) include four mutually partitioned viewpoints (V) of a first central viewpoint (V12), a second central viewpoint (V11), a first edge viewpoint (V22), and a second edge viewpoint (V21); however, in various embodiments, the number of the plurality of viewpoints (V) and the number of the plurality of light sources (30) are not limited thereto.

[0171] FIG. 8 is a drawing illustrating an example of a re-focusing lens of a display device according to one or more embodiments having a flat reflective surface.

[0172] Referring to FIG. 8, a multi-view lens (100-1) of a display device (1) according to one embodiment of the present disclosure may include a refracting portion (110) and a reflecting portion (120-1). Detailed descriptions of the features of the refracting portion (110) and the reflecting portion (120-1) correspond to those described in the refracting portion (110) and the reflecting portion (120) of the above-described embodiment, and thus, repeated descriptions may be omitted.

[0173] The reflective portion (121-0) may include a reflective surface (121-1) configured to reflect light from the second light source (32). The reflective surface (121-1) may be configured to reflect light from the second light source (32) and direct it toward a second point of view (V2). For example, the first reflective portion (120a-1) may include a reflective surface (121-1) configured to reflect light from the first edge light source (32a) and direct it toward a first edge point of view (V22). For example, the second reflective portion (120b-1) may include a reflective surface (121-1) configured to reflect light from the second edge light source (32b) and direct it toward a second edge point of view (V21).

[0174] The reflective surface (121-1) may have a flat shape. The reflective surface (121-1) may be formed as a plane. The reflective surface (121-1) may have a certain angle of inclination with respect to the first direction (Z). The reflective surface (121-1) may be inclined with respect to the first direction (Z) so as to get closer to the lens axis (LL) and the second direction (X) as the distance from the second light source (32) increases.

[0175] The angle of the reflective surface (121-1) with respect to the first direction (Z) can be appropriately set so that the light from the second light source (32) is totally reflected and can proceed toward the second viewpoint (V2) by taking into consideration the refractive index of the reflective portion (120-1), etc.

[0176] FIG. 9 is a drawing illustrating an example of a re-focusing lens of a display device according to one or more embodiments having a coated reflective surface.

[0177] Referring to FIG. 9, a re-focusing lens (100-2) of a display device (1) according to one embodiment of the present disclosure may include a refracting portion (110) and a reflecting portion (120-2). Detailed descriptions of the refracting portion (110) and the reflecting portion (120-2) correspond to those described in the refracting portion (110) and the reflecting portion (120 or 120-1) of the above-described embodiment, and thus, repeated descriptions may be omitted.

[0178] The reflective portion (121-2) may include a reflective surface (121-2) provided to reflect light from a second light source (32). The reflective surface (121-2) may be provided to reflect light from the second light source (32) and allow the light to advance to a second time point (V2). The reflective surface (121-2) may be coated with a coating layer (CL). For example, the coating layer (CL) may be coated on the outer side of the reflective surface (121-2). For example, the coating layer (CL) may include a material having a high light reflectivity, such as chromium (Cr). For example, the coating layer (CL) may be formed by plating a material having a relatively high light reflectivity on the outer side of the reflective surface (121-2). By providing the coating layer (CL) on the reflective surface (121-2), the light reflection efficiency at the reflective surface (121-2) can be further improved.

[0179] For example, the first reflector (120a-2) may include a reflective surface (121-2) provided to reflect light from the first edge light source (32a) and allow it to advance toward the first edge point (V22), and the reflective surface (121-2) of the first reflector (120a-2) may be coated with a coating layer (CL). For example, the second reflector (120b-2) may include a reflective surface (121-2) provided to reflect light from the second edge light source (32b) and allow it to advance toward the second edge point (V21), and the reflective surface (121-2) of the second reflector (120b-2) may be coated with a coating layer (CL).

[0180] FIG. 10 is a diagram illustrating an example of a re-focusing lens of a display device according to one or more embodiments including a reflective portion including a mirror.

[0181] Referring to FIG. 10, a re-focusing lens (100-3) of a display device (1) according to one embodiment of the present disclosure may include a refracting portion (110) and a reflecting portion (120-3). Detailed descriptions of the refracting portion (110) and the reflecting portion (120-3) correspond to those described in the refracting portion (110) and the reflecting portion (120 or 120-1 or 120-2) of the above-described embodiment, and thus, repeated descriptions may be omitted.

[0182] According to one embodiment, the reflector (120-3) of the re-focusing lens (100-3) may be formed separately from and spaced apart from the refracting portion (110). The reflector (120-3) may not be connected to the refracting portion (110).

[0183] According to one embodiment, the reflector (120-3) of the re-focusing lens (100-3) may include a mirror configured to reflect light from a second light source (32). The reflector (120-3) may include a reflective surface (121-3), and the mirror may be provided at least on the reflective surface (121-3) of the reflector (120-3). The mirror provided on the reflective surface (121-3) may be inclined with respect to the first direction (Z) so as to become closer to the lens axis (LL) and the second direction (X) as the distance from the second light source (32) in the first direction (Z) increases.

[0184] For example, the mirror provided on the reflective surface (121-3) may have a structure in which one surface of a material such as glass or transparent plastic is coated with a material having a relatively high light reflectivity, such as chrome. In addition, the mirror on the reflective surface (121-3) may include a mirror having a structure that is pore-formed or will be announced in the future.

[0185] In this way, the reflector (120-3) can reflect light including a mirror, and the light emitted from the second light source (32) enters the reflector (120-3) and does not pass through the reflector (120-3), but is directly reflected by the mirror of the reflective surface (121-3) and can proceed to the second time point (V2).

[0186] FIG. 11 is a diagram illustrating a manner in which light emitted from a plurality of light sources of a display device according to one or more embodiments passes through an optical sheet. FIG. 12 is a diagram illustrating a manner in which light emitted from a plurality of light sources of a display device according to one or more embodiments passes through holes of an optical sheet.

[0187] Referring to FIGS. 11 and 12, a display device (1) according to one embodiment of the present disclosure may include an optical sheet (40) configured to change the characteristics of light incident on a re-focusing lens (100). The optical sheet (40) may be disposed between a light source array (20) and the re-focusing lens (100). The optical sheet (40) may be disposed between a plurality of light sources (30) and the re-focusing lens (100).

[0188] In various embodiments, an image provided at a second point in time (V2) by light emitted from a second light source (32) and reflected by a reflector (120) and an image provided at a first point in time (V1) by light emitted from a first light source (31) and refracted by a refractor (110) may not overlap with each other to improve image quality. If the image provided at the first point in time (V1) and the image provided at the second point in time (V2) overlap with each other, the image quality of the entire image may deteriorate.

[0189] Since the light emitted from the second light source (32) must be incident on the reflector (120) adjacent to the edge of each multi-view lens (100) and then bent at a relatively large angle before proceeding to the second viewpoint (V2), it is desirable that the range of the light (i.e., the radiation width of the light) be relatively small so as not to overlap with the light from the first light source (31) in the field of view. For example, in order to prevent crosstalk of the image between multiple viewpoints (V) and to improve the image quality, the radiation range of the light emitted from the second light source (32) and incident on the reflector (120) may be smaller than the radiation range of the light emitted from the first light source (31) and incident on the refractor (110).

[0190] To implement this function, the optical sheet (40) may be arranged to limit the range of light emitted from the first light source (31) and incident on the refracting portion (110) to a first width (R1). In addition, the optical sheet (40) may be arranged to limit the range of light emitted from the second light source (32) and incident on the reflecting portion (120) to a second width (R2) smaller than the first width (R1). By this configuration, the range width of light incident on the reflecting portion (120) may be made smaller than the range width of light incident on the refracting portion (110), and image crosstalk at the time point (V) may be prevented and / or reduced.

[0191] According to one embodiment, as illustrated in FIG. 12, the optical sheet (40) may include a first hole (41) configured to transmit at least a portion of light emitted from a first light source (31) that proceeds to the refracting portion (110) and a second hole (42) configured to transmit at least a portion of light emitted from a second light source (32) that proceeds to the reflecting portion (120). For example, the first hole (41) may be configured to transmit at least a portion of light emitted from the first light source (31), and the second hole (42) may be configured to transmit at least a portion of light emitted from the second light source (32). Other portions of the optical sheet (40) in which the first hole (41) and the second hole (42) are not formed may be configured to restrict or block the propagation of light.

[0192] The size (d2) of the second hole (42) may be smaller than the size (d1) of the first hole (41). Accordingly, for example, based on the fact that the radiation ranges of the light emitted from each of the first light source (31) and the second light source (32) are almost the same, the range of the light emitted from the second light source (32) and proceeding to the reflector (120) may be more limited than the range of the light emitted from the first light source (31) and proceeding to the refractor (110).

[0193] The first hole (41) and the second hole (42) of the optical sheet (40) may have the shape of a slit extending along the direction in which the re-focusing lens (100) extends. For example, the first hole (41) and the second hole (42) of the optical sheet (40) may each extend in the third direction (Y). As another example, the first hole (41) and the second hole (42) of the optical sheet (40) may each extend in a direction inclined at an angle other than 90 degrees with respect to the second direction (X).

[0194] In FIGS. 11 and 12, only the first central light source (31a) among the first light sources (31) and the first edge light source (32a) among the second light sources (32) are illustrated, but the contents described above can also be correspondingly applied to the second central light source (31b) and the second edge light source (32b), respectively.

[0195] FIG. 13 is a diagram illustrating a manner in which light emitted from a plurality of light sources of a display device according to one or more embodiments passes through an optical sheet including a high refractive index portion and a low refractive index portion. FIG. 14 is a diagram illustrating a manner in which light emitted from a plurality of light sources of a display device according to one or more embodiments passes through an optical sheet including a high refractive index portion and a low refractive index portion. FIG. 15 is a diagram illustrating a manner in which light emitted from a plurality of light sources of a display device according to one or more embodiments passes through an optical sheet including a high refractive index portion and a low refractive index portion.

[0196] Referring to FIG. 13, a display device (1) according to one embodiment of the present disclosure may include an optical sheet (40-1) configured to refract light traveling from a light source (30) to a re-focusing lens (100) to limit the range of light emitted from each light source (30).

[0197] The optical sheet (40-1) may include a high refractive index portion (41-1) and a low refractive index portion (42-1). The high refractive index portion (41-1) may include a material having a higher refractive index than the refractive index of the material of the low refractive index portion (42-1). For example, light emitted from a light source (30) may be refracted while sequentially passing through the high refractive index portion (41-1) and the low refractive index portion (42-1) and then may be incident on a re-focusing lens (100). The high refractive index portion (41-1) may be arranged closer to the light source (30), and the low refractive index portion (42-1) may be arranged closer to the re-focusing lens (100). The light emitted from the light source (30) may be refracted on a surface where it is incident on the high refractive index portion (41-1). Light passing through the high refractive index portion (41-1) can be refracted at the boundary between the high refractive index portion (41-1) and the low refractive index portion (42-1).

[0198] Light emitted from a light source (30) may pass through a high refractive index portion (41-1) and a low refractive index portion (42-1) and the width of the light may be limited. For example, light emitted from a first light source (31) may pass through a high refractive index portion (41-1) and a low refractive index portion (42-1) and the range of the light may be limited to a first width (R1), and light emitted from a second light source (32) may pass through a high refractive index portion (41-1) and a low refractive index portion (42-1) and the range of the light may be limited to a second width (R2) smaller than the first width (R1).

[0199] In order to limit the range of light emitted from the first light source (31) and the range of light emitted from the second light source (32) to predetermined ranges, for example, the refractive indices of the materials constituting the high refractive index portion (41-1) and the low refractive index portion (42-1) may be appropriately determined. For example, the refractive index of the high refractive index portion (41-1) through which light emitted from the first light source (31) passes and the refractive index of the high refractive index portion (41-1) through which light emitted from the second light source (32) passes may be different from each other. For example, the refractive index of the high refractive index portion (41-1) through which light emitted from the first light source (31) passes may be greater than the refractive index of the high refractive index portion (41-1) through which light emitted from the second light source (32) passes. As another example, the refractive index of the high refractive index portion (41-1) through which light emitted from the first light source (31) passes and the refractive index of the high refractive index portion (41-1) through which light emitted from the second light source (32) passes may be almost the same.

[0200] In order to limit the range of light emitted from the first light source (31) and the range of light emitted from the second light source (32) to predetermined ranges, for example, the shape of the boundary between the high refractive index portion (41-1) and the low refractive index portion (42-1) may be appropriately determined. For example, the high refractive index portion (41-1) through which light emitted from the first light source (31) passes and the high refractive index portion (41-1) through which light emitted from the second light source (32) passes may have different shapes, such as the direction, length, and size of the boundary with the low refractive index portion (42-1), in which the boundary is arranged. As another example, the high refractive index portion (41-1) through which light emitted from the first light source (31) passes and the high refractive index portion (41-1) through which light emitted from the second light source (32) passes may have almost the same shape.

[0201] As in the embodiment illustrated in FIG. 13, the high refractive index portion (41-1) of the optical sheet (40-1) may have a cross-section of an approximately trapezoidal shape. For example, the high refractive index portion (41-1) may have a cross-section of a trapezoidal shape whose width in the second direction (X) becomes narrower as the distance from the light source (30) in the first direction (Z) increases. For example, the boundary between the high refractive index portion (41-1) and the low refractive index portion (42-1) may include a portion inclined at an angle of less than 90 degrees with respect to the first direction (Z) and a portion arranged at an angle of nearly 90 degrees with respect to the first direction (Z). However, the shapes of the high refractive index portion (41-1) and the low refractive index portion (42-1) of the optical sheet (40-1) illustrated in FIG. 13 are merely examples.

[0202] As in the embodiment illustrated in FIG. 14, the display device (1) may include an optical sheet (40-2) including a high refractive index portion (41-2) and a low refractive index portion (42-2). The high refractive index portion (41-2) of the optical sheet (40-2) may have an approximately triangular cross-section. For example, the high refractive index portion (41-2) may have a triangular cross-section whose width in the second direction (X) becomes narrower as the distance from the light source (30) in the first direction (Z) increases. For example, the boundary surface of the high refractive index portion (41-2) and the low refractive index portion (42-2) may be inclined at an angle less than 90 degrees with respect to the first direction (Z).

[0203] As in the embodiment illustrated in FIG. 15, the display device (1) may include an optical sheet (40-3) including a high refractive index portion (41-3) and a low refractive index portion (42-3). The high refractive index portion (41-2) of the optical sheet (40-2) may have a cross-section of a shape that is approximately a portion of an ellipse. For example, the high refractive index portion (41-2) may have a cross-section of a shape that is a portion of an ellipse whose width in the second direction (X) becomes narrower as the distance from the light source (30) in the first direction (Z) increases. For example, the boundary between the high refractive index portion (41-2) and the low refractive index portion (42-2) may include a curved surface.

[0204] The cross-section of the high refractive index portion (41-1 or 41-2 or 41-3) above can be defined as a cross-section cut in a direction approximately perpendicular to the third direction (Y).

[0205] The optical characteristics of the optical sheet (40-2) illustrated in FIG. 14 and the optical sheet (40-3) illustrated in FIG. 15 can correspond to the optical characteristics of the optical sheet (40-1) described with reference to FIG. 13, and thus a detailed description thereof is omitted below.

[0206] By this configuration, the range width of light incident on the reflector (120) can be made smaller than the range width of light incident on the refractor (110), and image crosstalk at the time point (V) can be prevented and / or reduced.

[0207] In FIGS. 13 to 15, only the first central light source (31a) among the first light sources (31) and the first edge light source (32a) among the second light sources (32) are illustrated, but the contents described above can also be correspondingly applied to the second central light source (31b) and the second edge light source (32b), respectively.

[0208] In various embodiments of the present disclosure, the structure of the optical sheet is not limited to the structure of the optical sheets (40, 40-1, 40-2, 40-3) described above with reference to FIGS. 11 to 15, and the display device (1) according to various embodiments may include various types of optical sheets.

[0209] FIG. 16 is a diagram illustrating how light emitted from a plurality of light sources of a display device according to one or more embodiments travels to a refocusing lens.

[0210] Referring to FIG. 16, a display device (1) according to one embodiment of the present disclosure may be configured such that each of a plurality of light sources (30) emits light of a limited range width to a re-focusing lens (100). A first light source (31) may be configured to emit light of a limited range width to a refracting portion (110), and a second light source (32) may be configured to emit light of a limited range width to a reflecting portion (120).

[0211] For example, the first light source (31) may be arranged to emit light of a first width (R1) toward the refracting portion (110). The second light source (32) may be arranged to emit light of a second width (R2) smaller than the first width (R1) toward the reflecting portion (120). Each light source (30) may include various structures that can limit the radiation width of the light itself.

[0212] In this case, for example, an optical sheet (40) may not be provided between the light source array (20) and the re-focusing lens (100). Nevertheless, since the plurality of light sources (30) emit light with a limited range width in themselves, the range width of the light incident on the reflector (120) may be smaller than the range width of the light incident on the refractor (110), and image crosstalk at the viewpoint (V) may be prevented and / or reduced.

[0213] In Fig. 16, only the first central light source (31a) among the first light sources (31) and the first edge light source (32a) among the second light sources (32) are illustrated, but the contents described above can also be correspondingly applied to the second central light source (31b) and the second edge light source (32b), respectively.

[0214] FIG. 17 is a diagram illustrating a plurality of adjacent light source arrays and a plurality of adjacent re-focusing lenses included in a display device according to one or more embodiments.

[0215] Referring to FIG. 17, a display device (1) according to one embodiment of the present disclosure may include a plurality of light source arrays (20) that are defined to be partitioned from each other, and a plurality of multi-view lenses (100) that respectively correspond to the plurality of light source arrays (20). In FIG. 17, the plurality of light source arrays (20) may refer to some light source arrays (20) among the entire light source arrays (20) of the display device (1). In FIG. 17, the plurality of multi-view lenses (100) may refer to some of the entire multi-view lenses (100) of the display device (1).

[0216] A plurality of light source arrays (20) can be arranged adjacent to each other. A plurality of light source arrays (20) can be arranged adjacent to each other in the second direction (X).

[0217] A plurality of re-point lenses (100) can be arranged adjacent to each other. A plurality of re-point lenses (100) can be arranged adjacent to each other in the second direction (X).

[0218] A plurality of light sources (30) included in a plurality of adjacent light source arrays (20) can emit light of different colors to form at least one pixel among a plurality of pixels (P) on a screen (S). Light emitted from a plurality of light sources (30) included in a plurality of adjacent light source arrays (20) can respectively transmit through a plurality of multi-view lenses (100) to provide images of different colors, and the images of different colors can be combined and viewed at a plurality of viewpoints (V).

[0219] This will be described in more detail with reference to the embodiment illustrated in Fig. 17.

[0220] For example, the light source array (20) of the display device (1) may include a first light source array (20C1), a second light source array (20C2), and a third light source array (20C3) that are adjacent to each other. The first light source array (20C1) may include a plurality of first color light sources (30C1) that emit light of a first color. The second light source array (20C2) may include a plurality of second color light sources (30C2) that emit light of a second color. The third light source array (20C3) may include a plurality of third color light sources (30C3) that emit light of a third color. The first color light source (30C1), the second color light source (30C2), and the third color light source (30C3) may include the first light source (31) and the second light source (32) described above, respectively, and a repeated description thereof may be omitted.

[0221] The first, second, and third colors described above may be different colors. The first, second, and third colors may be combined to form a single pixel. For example, the first color may be red, the second color may be green, and the third color may be blue, but the colors are not limited thereto.

[0222] The multi-view lens (100) of the display device (1) may include a first multi-view lens (100C1), a second multi-view lens (100C2), and a third multi-view lens (100C3) that are adjacent to each other. For example, the first multi-view lens (100C1) may correspond to the first light source array (20C1). For example, the second multi-view lens (100C2) may correspond to the second light source array (20C2). For example, the third multi-view lens (100C3) may correspond to the third light source array (20C3).

[0223] For example, the first re-point lens (100C1), the second re-point lens (100C2), and the third re-point lens (100C3) may have corresponding shapes (e.g., identical shapes), but are not limited thereto.

[0224] For example, light emitted from the first light source (31) among the first color light sources (30C1) can proceed to the first viewpoint (V1) by the refracting part (110) of the first multi-viewpoint lens (100C1). Light emitted from the first light source (31) among the second color light sources (30C2) can proceed to the first viewpoint (V1) by the refracting part (110) of the second multi-viewpoint lens (100C2). Light emitted from the first light source (31) among the third color light sources (30C3) can proceed to the first viewpoint (V1) by the refracting part (110) of the third multi-viewpoint lens (100C3). As a result, a combination of lights of various colors can be recognized at the first viewpoint (V1).

[0225] For example, light emitted from the second light source (32) among the first color light sources (30C1) can proceed to the second viewpoint (V2) by the reflector (120) of the first multi-viewpoint lens (100C1). Light emitted from the second light source (32) among the second color light sources (30C2) can proceed to the second viewpoint (V2) by the reflector (120) of the second multi-viewpoint lens (100C2). Light emitted from the second light source (32) among the third color light sources (30C3) can proceed to the second viewpoint (V2) by the reflector (120) of the third multi-viewpoint lens (100C3). As a result, a combination of lights of various colors can be recognized at the second viewpoint (V2).

[0226] In this way, pixels (P) on a screen (S) can be formed by a plurality of light source arrays (20C1, 20C2, 20C3) that are arranged adjacent to each other and emit light of different colors and a plurality of corresponding re-focusing lenses (100C1, 100C2, 100C3), and an image can be provided by combining a plurality of pixels (P).

[0227] Meanwhile, in the above, the light sources (30C1) in the first light source array (20C1) all emit light of the same first color, the light sources (30C2) in the second light source array (20C2) all emit light of the same second color, and the light sources (30C3) in the third light source array (20C3) all emit light of the same third color. However, this is not limited thereto. According to one embodiment, some of the light sources (30C1) included in the first light source array (20C1) may emit light of different colors, and this also applies to the second light source array (20C2) and the third light source array (20C3).

[0228] FIG. 18 is a diagram illustrating a light source array, a central re-view lens, and an outer re-view lens of a display device according to one or more embodiments. FIG. 19 is a diagram illustrating a light source array and a central re-view lens of a display device according to one or more embodiments. FIG. 20 is a diagram illustrating a light source array and an outer re-view lens of a display device according to one or more embodiments.

[0229] Referring to FIGS. 18 to 20, a display device (1) according to one embodiment of the present disclosure may include a plurality of re-view lenses (100) (e.g., a central re-view lens (100A) and an outer re-view lens (100B)) having different shapes depending on their positions in the display device (1).

[0230] According to one embodiment, the screen (S) of the display device (1) can extend in the second direction (X). Furthermore, according to one embodiment, the screen (S) of the display device (1) can be arranged so that a viewer can view it from various positions in the second direction (X).

[0231] In this case, if the re-focusing lens (100) positioned in the area adjacent to the center of the screen (S) and the re-focusing lens (100) positioned in the area adjacent to the edge of the screen (S) have the same shape, there is a possibility that images may not be clearly provided to each of the multiple viewpoints (V). For example, there is a possibility that the width of the field of view may narrow.

[0232] Accordingly, according to one embodiment, the refracting portion (110) of each of the plurality of multi-view lenses (100) may be arranged to refract light so that light from each of the first light sources (31) (e.g., the first central light source (31a) and the second central light source (31b)) of the plurality of light source arrays (20) proceeds toward the same first time point (V1) (e.g., the first central time point (V12) and the second central time point (V11)). In addition, the reflecting portion (120) of each of the plurality of multi-view lenses (100) may be arranged to reflect light so that light from each of the second light sources (32) (e.g., the first edge light source (32a) and the second edge light source (32b)) of the plurality of light source arrays (20) proceeds toward the same second time point (V2) (e.g., the first edge time point (V22) and the second edge time point (V21)).

[0233] According to one embodiment, the display device (1) may include a central re-focusing lens (100A) and an outer re-focusing lens (100B) having different shapes.

[0234] The display device (1) may include a plurality of light source arrays (20) that are partitioned from each other. For example, the plurality of light source arrays (20) may include a central light source array (20A) arranged in an area adjacent to the center in a second direction (X) of the screen (S), and an outer light source array (20B) arranged in the second direction (X) of the central light source array (20A). For example, the outer light source array (20B) may be arranged outside the central light source array (20A) in the second direction (X). For example, the outer light source array (20B) may be arranged in an area adjacent to an edge in the second direction (X) of the screen (S).

[0235] The central light source array (20A) and the outer light source array (20B) may each include the first light source (31) (e.g., the first central light source (31a) and the second central light source (31b)) and the second light source (32) (e.g., the first edge light source (32a) and the second edge light source (32b)) described above.

[0236] The central re-view lens (100A) may correspond to the central light source array (20A). The central re-view lens (100A) may be arranged adjacent to the central light source array (20A). The central re-view lens (100A) may be arranged in the first direction (Z) of the central light source array (20A). The refracting unit (110) of the central re-view lens (100A) may refract light from the first light source (31) of the central light source array (20A) and direct it to the first viewpoint (V1). For example, the refracting portion (110) of the central re-focusing lens (100A) can refract light from the first central light source (31a) of the central light source array (20A) and advance it to the first central viewpoint (V12), and can refract light from the second central light source (31b) of the central light source array (20A) and advance it to the second central viewpoint (V11). The reflecting portion (120) of the central re-focusing lens (100A) can reflect light from the second light source (32) of the central light source array (20A) and advance it to the second viewpoint (V2). For example, the first reflector (120a) of the central re-view lens (100A) can refract light from the first edge light source (32a) of the central light source array (20A) and advance it to the first edge view point (V22), and the second reflector (120b) of the central re-view lens (100A) can refract light from the second edge light source (32b) of the central light source array (20A) and advance it to the second edge view point (V21).

[0237] According to one embodiment, the description of the configuration of the central re-point lens (100A) corresponds to the configuration of the re-point lens (100) described with reference to FIGS. 5 to 17, and thus, a detailed description thereof may be omitted.

[0238] The outer re-viewpoint lens (100B) may correspond to the outer light source array (20B). The outer re-viewpoint lens (100B) may be arranged adjacent to the outer light source array (20B). The outer re-viewpoint lens (100B) may be arranged in the first direction (Z) of the outer light source array (20B). The refracting portion (110) of the outer re-viewpoint lens (100B) may refract light from the first light source (31) of the outer light source array (20B) and advance the light to the first viewpoint (V1). The reflecting portion (120) of the outer re-viewpoint lens (100B) may reflect light from the second light source (32) of the outer light source array (20B) and advance the light to the second viewpoint (V2).

[0239] Since the outer re-focusing lens (100B) is positioned on one side in the second direction (X) with respect to the center of the screen (S), it may have an asymmetrical shape so as to emit light biased to one side with respect to the second direction (X). As illustrated in FIGS. 18 and 20, the outer re-focusing lens (100B) may have an asymmetrical shape with respect to the center of the outer re-focusing lens (100B) in the second direction (X).

[0240] For example, as illustrated in FIG. 20, the outer re-focusing lens (100B) may include a reflector (120) and a refractor (110). The reflector (120) of the outer re-focusing lens (100B) may have a shape similar to one of the reflectors (120) of the central re-focusing lens (100A) (the first reflector (120a) or the second reflector (120b)). However, the reflector (120) of the outer re-focusing lens (100B) may be configured to bend the direction of light traveling from the second light source (32) at a larger angle than the reflector (120) of the central re-focusing lens (100A). For example, the angle at which the direction of travel of light emitted from the reflector (120) included in the outer re-focus lens (100B) is inclined with respect to the first direction (Z) may be greater than the angle at which the direction of travel of light emitted from the reflector (120) included in the central re-focus lens (100A) is inclined with respect to the first direction (Z).

[0241] For example, the refracting portion (110) of the outer re-focusing lens (100B) may be arranged to refract light from the first central light source (31a) and the second central light source (31b). For example, the refracting portion (110) of the outer re-focusing lens (100B) may refract light from the first central light source (31a) of the outer light source array (20B) to advance to the first central viewpoint (V12), and may refract light from the second central light source (31b) of the outer light source array (20B) to advance to the second central viewpoint (V11).

[0242] For example, the refracting portion (110) may include a plurality of refracting portions (e.g., a first refracting portion (110a) and a second refracting portion (110b)) having different curvatures. The exit surface (111a) of the first refracting portion (110a) and the exit surface (111b) of the second refracting portion (110b) may have different radii of curvature or may be discontinuously connected to each other. For example, light from the first central light source (31a) may be refracted by the first refracting portion (110a), and light from the second central light source (31b) may be refracted by the second refracting portion (110b). However, the present invention is not limited thereto, and in one embodiment, the refracting portion (110) may include a continuous exit surface or may have a uniform radius of curvature.

[0243] In one embodiment, when the reflector (120) of the outer re-viewpoint lens (100B) is arranged to reflect light from the first edge light source (32a) of the second light source (32) to the first edge viewpoint (V22), light from the second edge light source (32b) may be refracted by the refractor (110) of the outer re-viewpoint lens (100B) and may proceed to the second edge viewpoint (V21). For example, light from the second edge light source (32b) may be refracted by the second refractor (110b) of the outer re-viewpoint lens (100B) and may proceed to the second edge viewpoint (V21).

[0244] The reflector (120) of the outer refocus lens (100B) can reflect the light emitted from the first edge light source (32a) so that it intersects the lens axis passing through the focus of the refracting portion (110) (e.g., the first lens axis (LL1) passing through the first focus (F1) and / or the second lens axis (LL2) passing through the second focus (F2)) and advance it to the first edge viewpoint (V22).

[0245] The refracting part (110) (e.g., the second refracting part (110b)) of the outer refocusing lens (100B) can refract light emitted from the second edge light source (32b) so that it intersects with a lens axis passing through the focus of the refracting part (110) (e.g., the first lens axis (LL1) passing through the first focus (F1) and / or the second lens axis (LL2) passing through the second focus (F2)) and advance to the second edge viewpoint (V21).

[0246] By this configuration, the display device (1) can provide one field of view as a whole by using a plurality of re-view lenses (100) having different shapes depending on their positions in the second direction (X) on the screen (S), and the provided field of view can have a wide width.

[0247] In a display device (1) according to one embodiment, in order to provide a single field of view as a whole, a plurality of multi-view lenses (100) may be arranged relatively adjacent to a plurality of light source arrays (20). For example, a plurality of multi-view lenses (100) may be attached to and in contact with the front surface of a plurality of light source arrays (20), or may be attached to and in contact with the front surface of an optical sheet (40). In this case, light emitted from a plurality of light source arrays (20) may be incident only on the multi-view lens (100) corresponding thereto, and an image may be prevented from being repeatedly viewed at viewpoints as the light is incident on different multi-view lenses (100).

[0248] FIG. 21 is a drawing illustrating a light source array and a re-focusing lens of a display device according to one or more embodiments spaced apart from each other by a predetermined distance.

[0249] When describing some components of a display device (1) according to an embodiment of the present disclosure with reference to FIG. 21, components corresponding to the components of the embodiment described with reference to FIGS. 1 to 20 are given the same drawing reference numerals, and repeated descriptions may be omitted.

[0250] Referring to FIG. 21, in a display device (1) according to one embodiment of the present disclosure, a re-focusing lens (200) may be spaced apart from a light source array (20) in a first direction (Z).

[0251] The re-focusing lens (200) may be positioned at a distance (sd) from the light source array (20) in the first direction (Z). The distance (sd) may be determined as a distance at which light from a specific light source (30) of the light source array (20) can be simultaneously incident on two or more re-focusing lenses (200) among the plurality of re-focusing lenses (200).

[0252] For example, as illustrated in FIG. 21, light emitted from any one light source (30) included in the light source array (20) can be simultaneously incident on each of the first re-point lens (200A), the second re-point lens (200B), and the third re-point lens (200C), and can proceed after being refracted or reflected by each of them.

[0253] In this case, by using a re-focusing lens (200), the display device (1) can provide a wide range of viewing areas in multiple ways, and the same image can be repeatedly viewed in each viewing area.

[0254] For example, as illustrated in FIG. 21, the display device (1) can provide an X viewing area (VX), a Y viewing area (VY), and a Z viewing area (VZ) that are partitioned from each other. The X viewing area (VX), the Y viewing area (VY), and the Z viewing area (VZ) can be arranged to be partitioned from each other in the second direction (X).

[0255] Multiple time zones (VX, VY, VZ) may each include multiple viewpoints that are separated from each other.

[0256] For example, the X field of view (VX) may include time points (VX11, VX12) at which light emitted from the first light source (31) passes through one of the plurality of multi-point lenses (200) (e.g., the first multi-point lens (200A)). In addition, the X field of view (VX) may include time points (VX21, VX22) at which light emitted from the second light source (32) passes through one of the plurality of multi-point lenses (200) (e.g., the first multi-point lens (200A)).

[0257] For example, the Y field of view (VY) may include time points (VY11, VY12) at which light emitted from the first light source (31) passes through one of the plurality of multi-point lenses (200) (e.g., the second multi-point lens (200B)). In addition, the Y field of view (VY) may include time points (VY21, VY22) at which light emitted from the second light source (32) passes through one of the plurality of multi-point lenses (200) (e.g., the second multi-point lens (200B)).

[0258] For example, the Z field of view (VZ) may include time points (VZ11, VZ12) at which light emitted from the first light source (31) passes through one of the plurality of multi-point lenses (200) (e.g., the third multi-point lens (200C)). In addition, the Z field of view (VZ) may include time points (VZ21, VZ22) at which light emitted from the second light source (32) passes through one of the plurality of multi-point lenses (200) (e.g., the third multi-point lens (200C)).

[0259] In Fig. 21, for convenience of illustration, only the case where light emitted from the first central light source (31a) among the first light sources (31) progresses to the first central viewpoint (VX12, VY12, VZ12) of each viewing area (VX, VY, VZ) and the case where light emitted from the second edge light source (32b) among the second light sources (32) progresses to the second edge viewpoint (VX21, VY21, VZ21) of each viewing area (VX, VY, VZ) are illustrated. Light emitted from the second central light source (31b) among the first light sources (31) may progress to the second central viewpoint (VX11, VY11, VZ11) of each viewing area (VX, VY, VZ). Additionally, light emitted from the first edge light source (32a) among the second light sources (32) can proceed to the first edge time point (VX22, VY22, VZ22) of each viewing area (VX, VY, VZ).

[0260] For example, an image viewed at a first central viewpoint (VX12) in a viewing area X (VX), an image viewed at a first central viewpoint (VY12) in a viewing area Y (YV), and an image viewed at a first central viewpoint (VZ12) in a viewing area Z (VZ) may be substantially the same. For example, an image viewed at a second central viewpoint (VX11) in a viewing area X (VX), an image viewed at a second central viewpoint (VY11) in a viewing area Y (YV), and an image viewed at a second central viewpoint (VZ11) in a viewing area Z (VZ) may be substantially the same. For example, an image viewed at a first edge viewpoint (VX22) in a viewing area X (VX), an image viewed at a first edge viewpoint (VY22) in a viewing area Y (YV), and an image viewed at a first edge viewpoint (VZ22) in a viewing area Z (VZ) may be substantially the same. For example, the image recognized at the second edge viewpoint (VX21) of the X viewing area (VX), the image recognized at the second edge viewpoint (VY21) of the Y viewing area (YV), and the image recognized at the second edge viewpoint (VZ21) of the Z viewing area (VZ) may be almost identical to each other.

[0261] Meanwhile, according to various embodiments, in order to prevent image noise, each light source (30) may be configured to emit light in a limited manner toward a specific portion included in a specific multi-view lens (e.g., a first multi-view lens (200A), a second multi-view lens (200B), a third multi-view lens (200C)) among the plurality of multi-view lenses (200). For example, each of the first light sources (31) may be configured to emit light in a limited manner toward only a refractive portion of a specific multi-view lens (200) among the plurality of multi-view lenses (200). For example, each of the second light sources (32) may be configured to emit light in a limited manner toward a specific portion included in a specific multi-view lens (e.g., a first multi-view lens (200A), a second multi-view lens (200B), a third multi-view lens (200C)) among the plurality of multi-view lenses (200). In various embodiments, various optical elements may be provided in front of each of the plurality of light sources (30) configured to limit the propagation of light.

[0262] The configuration of the re-focusing lens (200) corresponds to the lenticular lens (100, etc.) described with reference to FIGS. 1 to 20, and therefore, a repeated description thereof will be omitted.

[0263] FIG. 22 is a diagram illustrating a light source array, a re-focusing lens, and a display panel of a display device according to one or more embodiments.

[0264] When describing some components of a display device (1) according to an embodiment of the present disclosure with reference to FIG. 22, components corresponding to the components of the embodiment described with reference to FIGS. 1 to 21 are given the same drawing reference numerals, and repeated descriptions may be omitted.

[0265] Referring to FIG. 22, a display device (1) according to one embodiment of the present disclosure may include a display panel (80) disposed in a first direction (Z) (i.e., forward) of a light source array (20). In this case, the light source array (20) may function as a backlight unit. The light source array (20) as a backlight unit may provide monochromatic light, such as white or blue. The display panel (80) may include, for example, a liquid crystal display (LCD) panel.

[0266] A re-focusing lens (300) according to one embodiment may be placed between a light source array (20) and a display panel (80). The re-focusing lens (300) may control the path of light from the light source array (20) and output it to the display panel (80).

[0267] The configuration of the re-pointing lens (300) corresponds to the re-pointing lens (100, etc.) described with reference to FIGS. 1 to 20, and therefore, a repeated description thereof will be omitted.

[0268] A display device according to one embodiment of the present disclosure may be a display device configured to provide a plurality of different images at a plurality of viewpoints. The display device may include a light source array configured to emit light in a first direction, and a multi-view lens arranged in the first direction of the light source array. The light source array may include a first light source configured to emit light for providing an image at a first viewpoint among the plurality of viewpoints, and a second light source arranged in a second direction different from the first direction of the first light source and configured to emit light for providing an image at a second viewpoint among the plurality of viewpoints, the second light source being arranged in the second direction of the first viewpoint. The multi-view lens may include a refracting unit configured to refract light emitted from the first light source and propagate it toward the first viewpoint, and a reflecting unit arranged in the second direction of the refracting unit and propagate it toward the second viewpoint.

[0269] The above refracting portion may have a lens axis passing through the focus of the refracting portion in the first direction. The reflecting portion may include a reflecting surface inclined with respect to the first direction so as to become closer to the lens axis in the second direction as the distance from the second light source increases.

[0270] The above reflector may be configured to have a predetermined refractive index. The reflector may include a reflective surface configured to totally reflect light incident on the reflector from the second light source.

[0271] The above reflective portion may further include a refracting surface positioned at a position where light reflected by the reflective surface travels. The refracting surface may be configured to refract the light reflected by the reflective surface at a smaller angle relative to the first direction.

[0272] The second light source may include a first edge light source arranged on one side from the first light source in the second direction, and a second edge light source arranged on the other side opposite the first edge light source from the first light source in the second direction. The reflector may include a first reflector arranged on one side from the refracting part in the second direction and configured to reflect light emitted from the first edge light source, and a second reflector arranged on the other side opposite the first reflector in the second direction from the refracting part and configured to reflect light emitted from the second edge light source.

[0273] The second viewpoint may include a first edge viewpoint arranged on one side from the first viewpoint in the second direction, and a second edge viewpoint arranged on the other side opposite the first edge viewpoint in the second direction from the first viewpoint. The first reflector may be arranged to reflect light from the first edge light source toward the first edge viewpoint. The second reflector may be arranged to reflect light from the second edge light source toward the second edge viewpoint.

[0274] The above re-focusing lens may be adjacent to one side of the first direction side of the light source array.

[0275] An optical sheet may further be disposed between the light source array and the re-focusing lens. The optical sheet may be configured to limit the range of light emitted from the first light source and incident on the refracting portion to a first width. The optical sheet may be configured to limit the range of light emitted from the second light source and incident on the reflecting portion to a second width smaller than the first width.

[0276] The optical sheet may include a first hole configured to transmit at least a portion of light emitted from the first light source and transmitted to the refracting portion, and a second hole arranged in the second direction of the first hole and configured to transmit at least a portion of light emitted from the second light source and transmitted to the reflecting portion. The size of the second hole may be smaller than the size of the first hole.

[0277] The first light source may be arranged to emit light in a range of a first width toward the refracting portion. The second light source may be arranged to emit light in a range of a second width smaller than the first width toward the reflecting portion.

[0278] The light source array may include a plurality of light source arrays that are partitioned from each other. The multi-view lens may include a plurality of multi-view lenses corresponding to the plurality of light source arrays, respectively. The refracting unit of each of the plurality of multi-view lenses may be arranged to refract light so that light from the first light source of each of the plurality of light source arrays proceeds toward the same first viewpoint. The reflecting unit of each of the plurality of multi-view lenses may be arranged to reflect light so that light from the second light source of each of the plurality of arrays proceeds toward the same second viewpoint.

[0279] The light source array may include a plurality of light source arrays that are partitioned from each other. The plurality of light source arrays may include a central light source array arranged at the center of the plurality of light source arrays in the second direction, and an outer light source array positioned in the second direction of the central light source array. The multi-view lens may include a plurality of multi-view lenses. The plurality of multi-view lenses may include a central multi-view lens arranged in the first direction of the central light source array, and an outer multi-view lens arranged in the first direction of the outer light source array.

[0280] The above outer re-focusing lens may have an asymmetrical shape with respect to the center of the outer re-focusing lens in the second direction.

[0281] The angle at which the direction of travel of light emitted from the reflector included in the outer re-focusing lens is inclined with respect to the first direction may be greater than the angle at which the direction of travel of light emitted from the reflector included in the central re-focusing lens is inclined with respect to the first direction.

[0282] The first direction and the second direction may be perpendicular to each other. The re-focusing lens may extend in a third direction different from the first direction and the second direction.

[0283] A display device according to one embodiment of the present disclosure may include a light source array including a first light source and a second light source arranged in a second direction different from the first direction and configured to emit light in a first direction, and a multi-view lens arranged in the first direction of the light source array. The multi-view lens may include a refracting portion arranged to refract light emitted from the first light source, and a reflecting portion arranged in the second direction of the refracting portion and configured to reflect light emitted from the second light source so that the focus of the refracting portion intersects a lens axis passing in the first direction.

[0284] The above reflector may include a reflective surface inclined with respect to the first direction so that the further away from the second light source, the closer the lens axis passing through the focus of the refracting portion becomes in the second direction.

[0285] The second light source may include a first edge light source arranged on one side from the first light source in the second direction, and a second edge light source arranged on the other side opposite the first edge light source in the second direction from the first light source. The reflector may include a first reflector arranged on one side from the refracting part in the second direction and configured to reflect light emitted from the first edge light source in a manner intersecting the lens axis, and a second reflector arranged on the other side from the refracting part in the second direction opposite the first reflector and configured to reflect light emitted from the second edge light source in a manner intersecting the lens axis.

[0286] A display device according to one embodiment of the present disclosure may include a light source array in which a plurality of light sources are arranged, and a multi-view lens arranged in front of the light source array. The plurality of light sources may include a first light source configured to emit first light for providing a first image, and a second light source configured to emit second light for providing a second image different from the first image. The multi-view lens may include a refracting unit configured to refract the first light in front of the first light source and propagate it toward a first viewpoint, and a reflecting unit arranged in front of the second light source and adjacent to the refracting unit and adapted to reflect the second light so as to intersect with the first light and propagate it toward a second viewpoint separated from the first viewpoint.

[0287] The angle at which the direction in which the second light emitted from the reflector travels is inclined with respect to the front-back direction of the light source array may be greater than the angle at which the direction in which the first light emitted from the refractor travels is inclined with respect to the front-back direction of the light source array.

[0288] According to the invention, a display device can provide different images at multiple viewpoints by including a multi-view lens disposed in front of a light source array.

[0289] According to the idea of ​​the present disclosure, a display device can include a multi-view lens including a refracting portion and a reflecting portion, thereby increasing the range of the direction in which light travels and expanding the area of ​​multiple viewpoints.

[0290] According to the idea of ​​the present disclosure, a display device can reduce image noise and improve image quality by controlling the direction of light propagation using a refracting part and a reflecting part of a re-focusing lens, thereby reducing the overlapping of images at a viewpoint.

[0291] According to the idea of ​​the present disclosure, a display device can reduce noise of an image and improve image quality by including an optical sheet or a light source having such a structure, which is disposed between a re-focusing lens and a light source array and controls a range of light incident on the re-focusing lens.

[0292] According to the idea of ​​the present disclosure, a display device can prevent a decrease in brightness of an image while expanding the area of ​​multiple viewpoints by using a refracting part and a reflecting part of a re-focusing lens.

[0293] The effects according to the idea of ​​the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0294] The above illustrates and describes specific embodiments. However, the invention is not limited to the above-described embodiments, and those skilled in the art will readily appreciate that various modifications and implementations can be made without departing from the spirit and scope of the invention as set forth in the claims below.

Claims

1. A display device configured to provide multiple different images at multiple points in time, an array of light sources configured to emit light in a first direction; and a re-focusing lens adjacent to the first direction in the light source array; The above light source array is, A first light source configured to emit light to provide an image at a first point in time among the plurality of points in time; and A second light source is adjacent to the first light source in a second direction different from the first direction and configured to emit light to provide an image at a second time point adjacent to the first time point in the second direction among the plurality of time points; The above refocusing lens is, A refracting unit configured to refract light emitted from the first light source toward the first point in time; and A display device comprising a reflector adjacent to the refracting portion in the second direction and configured to reflect light emitted from the second light source toward the second viewpoint.

2. In paragraph 1, The above refracting part has a lens axis passing through the focus of the above refracting part in the first direction, A display device wherein the reflector includes a reflective surface inclined with respect to the first direction such that the distance between the reflector and the lens axis decreases as the distance from the second light source to the reflector in the second direction increases.

3. In paragraph 1, The above reflector has a predetermined refractive index, A display device including a reflective surface configured to totally reflect light incident on the reflective portion from the second light source.

4. In paragraph 3, The above reflective portion further includes a refracting surface configured to allow light reflected by the reflective surface to be incident, A display device in which the above refracting surface is configured to refract light reflected by the above reflecting surface so that the angle at which the refracted light is inclined with respect to the first direction is reduced.

5. In paragraph 1, The above second light source is, a first edge light source arranged on the first side of the first light source in the second direction; and a second edge light source disposed on a second side of the first light source opposite to the first side of the first light source in the second direction; The above reflector, A first reflector arranged on the first side of the refracting portion in the second direction and configured to reflect light emitted from the first edge light source; and A display device comprising a second reflector arranged on a second side of the refracting portion opposite to the first side of the refracting portion in the second direction and configured to reflect light emitted from the second edge light source.

6. In paragraph 5, The second point above is, a first edge point positioned on the first side of the first point in the second direction; and a second edge point disposed on a second side of the first point opposite to the first side of the first point in the second direction; The first reflector is configured to reflect light from the first edge light source toward the first edge viewpoint, A display device in which the second reflector is configured to reflect light from the second edge light source toward the second edge viewpoint.

7. In paragraph 1, The above re-focusing lens is a display device adjacent to one side of the first direction side of the light source array.

8. In paragraph 1, Further comprising an optical sheet disposed between the light source array and the re-focusing lens; The above optical sheet, It is configured to limit the range of light emitted from the first light source and incident on the refracting portion to a first width, A display device configured to limit the range of light emitted from the second light source and incident on the reflector to a second width smaller than the first width.

9. In paragraph 8, The above optical sheet, A first hole configured to transmit at least a portion of light emitted from the first light source and traveling to the refracting portion; and A second hole adjacent to the first hole in the second direction and configured to transmit at least a portion of light emitted from the second light source and traveling to the reflector; A display device in which the size of the second hole is smaller than the size of the first hole.

10. In paragraph 1, The first light source is configured to emit light in a range of a first width toward the refracting portion, A display device in which the second light source is configured to emit light in a range of a second width smaller than the first width toward the reflector.

11. In paragraph 1, The above light source array includes a plurality of light source arrays that are partitioned from each other, The above re-pointing lens includes a plurality of re-pointing lenses each corresponding to the plurality of light source arrays, The refracting section of each of the plurality of re-focusing lenses is configured to refract light from the first light source of each of the plurality of light source arrays so that the light proceeds toward the same first point of view, A display device in which the reflector of each of the plurality of re-viewing lenses is configured to reflect light from the second light source of each of the plurality of arrays so that the light proceeds toward the same second viewpoint.

12. In paragraph 1, The above light source array includes a plurality of light source arrays that are partitioned from each other, and the plurality of light source arrays are: A central light source array arranged at the center of the second direction of the plurality of light source arrays; and An outer light source array adjacent to the central light source array in the second direction; The above re-pointing lens comprises a plurality of re-pointing lenses, and the plurality of re-pointing lenses are: a central re-focusing lens adjacent to the central light source array in the first direction; and A display device comprising an outer re-focusing lens adjacent to the outer light source array in the first direction.

13. In paragraph 12, A display device in which the outer re-focusing lens has an asymmetrical shape based on the center of the outer re-focusing lens in the second direction.

14. In paragraph 12, The angle at which the direction of travel of light emitted from the reflector included in the outer re-focusing lens is inclined with respect to the first direction is A display device in which the direction of travel of light emitted from the reflector included in the central re-focusing lens is greater than an angle inclined with respect to the first direction.

15. In paragraph 1, The first direction and the second direction are perpendicular to each other, A display device in which the above-described re-focusing lens extends in a third direction different from the first direction and the second direction.

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