Display device

Abstract

A display apparatus includes a display panel including a plurality of pixels, each of the plurality of pixels including a light emitting layer; and a lenticular lens including a curved base disposed on a surface of the display panel with a predetermined radius of curvature and a plurality of lenses disposed on the curved base and inclined from one side of the display panel. A thickness of the curved base of the lenticular lens increases as a distance from a center of the lenticular lens increases.

Description

Technical Field

[0001] Embodiments of the present invention relate to display devices. Background Technology

[0002] Three-dimensional (3D) display technology is divided into stereoscopic and autostereoscopic technologies. Stereoscopic technology utilizes the parallax image between the left and right eyes, which provides a large stereoscopic effect. Stereoscopic technology includes both eyeglass-based and eyeglass-free methods, both of which are already in practical use. According to the eyeglass-based method, left-eye and right-eye images with different polarizations are displayed on a direct-view display or projector screen, allowing viewers with polarized glasses to see a stereoscopic image. Alternatively, the left-eye and right-eye images are displayed using time-division multiplexing, allowing viewers with shutter glasses to see a stereoscopic image. According to the eyeglass-free method, optical plates such as parallax gratings and biconvex lenses are used to separate the optical axis of the left-eye image from that of the right-eye image, allowing viewers to see a stereoscopic image without eyeglasses.

[0003] Glasses-free display devices may include 3D light controllers, such as biconvex lenses, parallax gratings, switchable gratings, and switchable lenses. Glasses-free display devices can use 3D light controllers to appropriately control the light emitted from the pixels of the display panel and can define a video area at an optimal viewing distance to achieve 3D images. The video area may include n views, where n is a natural number equal to or greater than 2. Summary of the Invention

[0004] The present invention provides a display device comprising a display panel and a stereo lens, wherein the display panel is bent at a predetermined radius of curvature, the stereo lens is disposed on the surface of the display panel, and the display device matches the observation points of the plurality of lenses by adjusting at least one of the following: the thickness of the substrate of the stereo lens, the radius of curvature of each of the plurality of lenses, the thickness of each of the plurality of lenses, and the lens spacing.

[0005] It should be noted that the present invention is not limited to the features described above, and other embodiments of the present invention will be apparent to those skilled in the art from the following description.

[0006] Embodiments of the present invention provide a display device, comprising: a display panel including a plurality of pixels, each of the plurality of pixels including a light-emitting layer; and a stereolens comprising a curved substrate disposed on the surface of the display panel with a predetermined radius of curvature, and a plurality of lenses disposed on the curved substrate and tilted from one side of the display panel. The thickness of the curved substrate of the stereolens increases with increasing distance from the center of the stereolens.

[0007] In this implementation, the surface radius of curvature of each of the plurality of lenses may increase with increasing distance from the center of the stereo lens.

[0008] In one implementation, the thickness of each of the plurality of lenses may decrease as the distance from the center of the stereo lens increases.

[0009] In one implementation, the distance between the light-emitting layer and each of the plurality of lenses can be increased as the distance from the center of the display panel increases.

[0010] In this implementation, the video regions of each of the multiple lenses may overlap. The width of the video region of each of the multiple lenses may decrease as the distance from the center of the stereoscopic lens increases.

[0011] In an implementation, the thickness of the curved substrate of the stereo lens can be determined based on the refractive index of the curved substrate, the refractive index between the light-emitting layer and the curved substrate, the distance between the light-emitting layer and the curved substrate, the refractive index of the plurality of lenses, the thickness of each of the plurality of lenses, and the object distance of each of the plurality of lenses.

[0012] In this implementation, the thickness of the curved substrate of the stereolens can be determined according to the following equation:

[0013]

[0014] Where T1 represents the thickness of the curved substrate of the stereo lens, n1 represents the refractive index of the curved substrate, d1 represents the object distance of each of the multiple lenses, T2 represents the distance between the light-emitting layer and the curved substrate, n2 represents the refractive index between the light-emitting layer and the curved substrate, T3 represents the thickness of each of the multiple lenses, and n3 represents the refractive index of the multiple lenses.

[0015] In an implementation, the thickness of each of the plurality of lenses can be determined based on the surface radius of curvature and the lens spacing of each of the plurality of lenses.

[0016] In this implementation, the thickness of each of the plurality of lenses can be determined according to the following equation:

[0017]

[0018] Where T3 represents the thickness of each of the multiple lenses, R1 represents the surface radius of curvature of each of the multiple lenses, and P represents the lens spacing.

[0019] Embodiments of the present invention provide a display device, comprising: a display panel including a plurality of pixels and curved at a predetermined radius of curvature, each of the plurality of pixels including a light-emitting layer; and a stereo lens including a substrate disposed on a surface of the display panel and a plurality of lenses disposed on the substrate and tilted from one side of the display panel. The lens spacing of the plurality of lenses is substantially equal. The lens spacing is the distance between the lens centers of adjacent lenses in the plurality of lenses, and wherein a line extending from the lens center of each of the plurality of lenses to the center of a pixel on the display panel corresponding to the lens center reaches a target viewing point.

[0020] In this embodiment, the surface radii of curvature of the plurality of lenses may all be substantially equal. The center of each of the plurality of lenses may be positioned on a curve having a predetermined radius of curvature.

[0021] In this implementation, the thickness of all the lenses can be substantially equal. The thickness of the substrate of the stereo lens can be uniform.

[0022] In an implementation, the lens spacing can be determined based on the length of the lens region of the stereo lens and the number of lenses. The length of the lens region of the stereo lens can correspond to the length of the curve from the center of the outermost lens at the edge of the adjacent stereo lens to the center of the outermost lens at the opposite edge of the adjacent stereo lens.

[0023] In the implementation method, the length of the lens region of the stereo lens can be determined according to the following equation:

[0024] B=2(RL)θ′

[0025] Where B represents the length of the lens region, RL represents the distance between the origin of the predetermined radius of curvature of the display panel and the center of the outermost lens, and θ' represents the angle between the straight line passing through the origin of the predetermined radius of curvature of the display panel and the center of the outermost lens and the reference line passing through the origin of the predetermined radius of curvature of the display panel.

[0026] In an embodiment of the present invention, a display device includes: a display panel comprising a plurality of pixels and curved at a predetermined radius of curvature, each of the plurality of pixels including a light-emitting layer; and a stereo lens comprising a substrate disposed on a surface of the display panel and a plurality of lenses disposed on the substrate and tilted from one side of the display panel. The spacing between the plurality of lenses increases with increasing distance from the center of the stereo lens, wherein the lens spacing is the distance between the lens centers of adjacent lenses among the plurality of lenses.

[0027] In one implementation, the target observation point can be reached by extending a line through the center of each of the multiple lenses and the pixel center of the display panel corresponding to the center of the lens.

[0028] In this implementation, the angle between a straight line passing through the lens center of each of the plurality of lenses and the origin of a predetermined radius of curvature of the display panel, and a reference line passing through the origin of the predetermined radius of curvature of the display panel, can be determined according to the following equation:

[0029]

[0030] Wherein, θ' represents the angle between a straight line passing through the center of each of the multiple lenses and the origin of a predetermined radius of curvature of the display panel, and a reference line passing through the origin of the predetermined radius of curvature of the display panel; α represents the angle between a straight line passing through the target observation point and the center of each of the multiple lenses, and a reference line passing through the origin; R represents the predetermined radius of curvature of the display panel; L represents the distance between each of the multiple lenses and the light-emitting layer; and Y represents the distance between the origin and the target observation point.

[0031] In this implementation, the angle between a straight line passing through the target observation point and the pixel center of the display panel and a reference line passing through the origin of a predetermined radius of curvature of the display panel can be determined according to the following equation:

[0032]

[0033] Where α represents the angle between the straight line passing through the target observation point and the center of each of the multiple lenses and the reference line passing through the origin, x' represents the x-axis coordinate of the pixel center, y' represents the y-axis coordinate of the pixel center, and Y represents the distance between the origin and the target observation point.

[0034] In this implementation, the angle between a straight line passing through the origin of a predetermined radius of curvature of the display panel and the center of the lens of each of the plurality of lenses and a straight line passing through the target observation point and the center of the lens can be determined according to the following equation:

[0035]

[0036] Wherein, β represents the angle between the straight line passing through the origin of the predetermined radius of curvature of the display panel and the center of the lens of each of the plurality of lenses and the straight line passing through the target observation point and the center of the lens, α represents the angle between the straight line passing through the target observation point and the center of the lens of each of the plurality of lenses and the reference line passing through the origin, R represents the predetermined radius of curvature of the display panel, L represents the distance between each of the plurality of lenses and the light-emitting layer, and Y represents the distance between the origin and the target observation point.

[0037] In this implementation, the coordinates of the pixel center of the display panel can be determined according to the following equation:

[0038] (x′, y′)=(R sinθ, R cosθ)

[0039] Where x' represents the x-axis coordinate of the pixel center, y' represents the y-axis coordinate of the pixel center, R represents the predetermined radius of curvature of the display panel, and θ represents the angle between the straight line passing through the pixel center and the origin of the predetermined radius of curvature of the display panel and the reference line passing through the origin.

[0040] Embodiments of the present invention provide a display device comprising a display panel bent at a predetermined radius of curvature and a stereolens disposed on the surface of the display panel. When the stereolens attached to the flat display panel has an observation point, the observation points of the plurality of lenses may become different as the stereolens and the display panel are bent together. In this respect, the display device matches the different observation points of the plurality of lenses by adjusting at least one of the following: the thickness of the substrate of the stereolens, the predetermined radius of curvature of each of the plurality of lenses, the thickness of each of the plurality of lenses, and the lens spacing, thereby displaying a stereoscopic image.

[0041] It should be noted that the effects of the present invention are not limited to those described above, and other effects of the present invention will be apparent to those skilled in the art from the following description. Attached Figure Description

[0042] The above and other embodiments and features of the present invention will become clearer by referring to the accompanying drawings and describing the embodiments of the present invention in detail.

[0043] Figure 1 This is a perspective view of an embodiment of the display device according to the present invention.

[0044] Figure 2 This is a perspective view illustrating an embodiment of the display panel of a display device according to the present invention.

[0045] Figure 3 This is a perspective view illustrating an embodiment of a stereoscopic lens in a display device according to the present invention.

[0046] Figure 4 It is a view that shows multiple video areas provided by a display device.

[0047] Figure 5 This is a cross-sectional view illustrating an embodiment of the pixel structure of a display device according to the present invention.

[0048] Figure 6 This is a cross-sectional view illustrating an embodiment of the display device according to the present invention.

[0049] Figure 7 It is shown Figure 6 A cross-sectional view of a portion of the display device.

[0050] Figure 8This is a diagram illustrating an embodiment of the target observation point and the actual observation point of the radius of curvature of a stereo lens in a display device according to the present invention.

[0051] Figure 9 This is a diagram illustrating an embodiment of the process of matching an actual observation point with a target observation point in a display device according to the present invention.

[0052] Figure 10 The diagram shows an embodiment of a video region formed by the outermost lens and a video region formed by the central lens that overlap each other in a display device according to the invention.

[0053] Figure 11 This is a flowchart illustrating an embodiment of the process for calculating the lens-pixel distance in a display device according to the present invention.

[0054] Figure 12 This is a cross-sectional view illustrating another embodiment of the display device according to the present invention.

[0055] Figure 13A This is a diagram illustrating another embodiment of the arrangement of the target viewing point, lens center, and pixel center in a display device, and Figure 13B yes Figure 13A An enlarged view of a portion of the display device.

[0056] Figure 14 This is a diagram illustrating another embodiment of the distance between the center of the central pixel and the center of the outermost pixel in a display device.

[0057] Figure 15 This is a diagram illustrating another embodiment of the distance between the center of the central lens and the center of the outermost lens in a display device.

[0058] Figure 16 This is a flowchart illustrating another embodiment of the process for calculating the lens spacing in a display device according to the present invention.

[0059] Figure 17 This is a cross-sectional view illustrating another embodiment of a display device according to another embodiment of the present invention.

[0060] Figure 18 It is shown Figure 17 A cross-sectional view of a stereoscopic lens.

[0061] Figure 19 This is a diagram illustrating another embodiment of the arrangement of the target viewing point, lens center, and pixel center in a display device.

[0062] Figure 20 This is a diagram illustrating another embodiment of the process for calculating the coordinates of the center of a lens in a display device according to the present invention.

[0063] Figure 21 This is a flowchart illustrating another embodiment of the process for calculating the spacing between multiple lenses in a display device according to the present invention. Detailed Implementation

[0064] In the following description, numerous specific details are set forth for purposes of explanation in order to provide a thorough understanding of various embodiments or implementations of the invention. As used herein, “implementation” and “method” are interchangeable terms and are non-limiting examples of apparatus or methods employing one or more of the inventive concepts disclosed herein. However, it will be apparent that various embodiments may be practiced without these specific details or with one or more equivalent arrangements. In other instances, well-known structures and apparatuses are shown in block diagram form to avoid unnecessarily obscuring the various embodiments. Furthermore, the various embodiments may be different, but not necessarily exclusive. For example, a particular shape, configuration, and characteristic of an embodiment may be used or implemented in another embodiment without departing from the inventive concept.

[0065] Unless otherwise stated, the described embodiments should be understood as exemplary features providing details of variations in some ways in which the inventive concept can be implemented in practice. Therefore, unless otherwise stated, features, components, modules, layers, films, panels, regions and / or aspects (hereinafter individually or collectively referred to as “elements”) of various embodiments may be combined, separated, interchanged and / or rearranged in other ways without departing from the inventive concept.

[0066] The use of crosshairs and / or shading in the accompanying drawings is generally provided to clarify the boundaries between adjacent elements. Therefore, unless specified, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for a particular material, material properties, size, scale, commonalities between the elements shown, and / or any other characteristics, properties, or characteristics of the elements. Furthermore, in the drawings, the dimensions and relative dimensions of elements may be exaggerated for clarity and / or descriptive purposes. When embodiments can be implemented differently, a particular process sequence may be performed differently than the sequence described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Additionally, the same reference numerals denote the same elements.

[0067] When a component or layer is referred to as being "on" another component or layer, "connected to," or "attached to" another component or layer, it can be directly on, directly connected to, or directly attached to the other component or layer, or there can be an intermediate component or layer. However, when a component or layer is referred to as being "directly on" another component or layer, "directly connected to," or "directly attached to" another component or layer, there is no intermediate component or layer. Therefore, the term "connection" can refer to a physical connection, electrical connection, and / or fluid connection with or without an intermediate component. Furthermore, the X-axis, Y-axis, and Z-axis are not limited to the three axes of a Cartesian coordinate system, such as the x-axis, y-axis, and z-axis, and can be interpreted in a broader sense. For example, the X-axis, Y-axis, and Z-axis can be perpendicular to each other, or they can represent different directions that are not perpendicular to each other. For the purposes of this disclosure, “at least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” can be interpreted as X only, Y only, Z only, or any combination of two or more of X, Y, and Z, such as, for example, XYZ, XYY, YZ, and ZZ. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0068] Although the terms “first,” “second,” etc., may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Therefore, without departing from the teachings of this disclosure, the first element discussed below may be referred to as the second element.

[0069] For descriptive purposes, spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” “side” (e.g., as in “sidewall”), etc., may be used herein to describe the relationship between one element and another element (or multiple elements) as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, spatial relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture. For example, if the device in the drawings is flipped, an element described as “below” or “under” other elements or features will consequently be oriented “above” other elements or features. Thus, the exemplary term “below” can encompass both above and below orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or in other orientations), and therefore, the spatial relative descriptive terms used herein should be interpreted accordingly.

[0070] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context clearly indicates otherwise. Furthermore, when used in this specification, the terms “comprises,” “comprising,” “includes,” and / or “including” specify the presence of the described features, integrals, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than terms of degree, and are therefore used to allow for inherent deviations in measurements, calculated values, and / or provided values ​​that will be recognized by those skilled in the art.

[0071] Various embodiments are described herein with reference to sectional views and / or exploded views as schematic diagrams of idealized embodiments and / or intermediate structures. Therefore, variations in the illustrated shapes should be expected, for example, due to manufacturing techniques and / or tolerances. Consequently, the embodiments disclosed herein should not necessarily be construed as limited to the shape of the specific regions shown, but should include, for example, deviations in shape due to manufacturing processes. In this way, the regions shown in the figures may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of the areas of the device, and are therefore not necessarily intended to be limiting.

[0072] As is customary in the art, some embodiments are described and illustrated in the accompanying drawings with respect to functional blocks, units, and / or modules. Those skilled in the art will understand that these blocks, units, and / or modules are physically implemented by electrical circuits (or optical circuits) such as logic circuits, discrete components, microprocessors, hardwired circuits, memory elements, wiring connectors, etc., which can be formed using semiconductor-based manufacturing techniques or other manufacturing techniques. Where blocks, units, and / or modules are implemented by microprocessors or other similar hardware, they can be programmed and controlled using software (e.g., microcode) to perform the various functions discussed herein, and can optionally be driven by firmware and / or software. It is also contemplated that each block, unit, and / or module can be implemented by dedicated hardware, or as a combination of dedicated hardware for performing some functions and a processor (e.g., one or more programmable microprocessors and associated circuitry) for performing other functions. Furthermore, without departing from the scope of the inventive concept, each block, unit, and / or module in some embodiments may be physically separated into two or more interactive and discrete blocks, units, and / or modules. Furthermore, without departing from the scope of the inventive concept, blocks, units and / or modules in some embodiments may be physically combined into more complex blocks, units and / or modules.

[0073] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms, such as those defined in common dictionaries, shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field, and shall not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0074] Figure 1 This is a perspective view of an embodiment of the display device according to the present invention. Figure 2 This is a perspective view illustrating an embodiment of the display panel of a display device according to the present invention. Figure 3 This is a perspective view illustrating an embodiment of a stereoscopic lens in a display device according to the present invention.

[0075] Reference Figures 1 to 3 The display device 10 can be implemented as a flat panel display device, such as a liquid crystal display (“LCD”) device, a field emission display (“FED”) device, a plasma display panel (“PDP”) device, and an organic light-emitting diode (“OLED”) display device. In an embodiment, for example, the display device can be a curved display device capable of displaying stereoscopic images.

[0076] The display device 10 may include a cover window 100, a display panel 200, a stereo lens 300, and a cover frame 900.

[0077] Cover 100 can cover the top surface of display device 10. Cover 100 is disposed on stereoscopic lens 300 to protect display device 10. Cover 100 may include a transmissive portion for displaying an image of display panel 200 and a non-transmissive portion other than the transmissive portion. In one embodiment, for example, the non-transmissive portion of cover 100 may be opaque, so that the user cannot see any elements other than the image on display panel 200. In another embodiment, for example, the non-transmissive portion of cover 100 may be implemented as a decorative layer of a pattern that is visible to the user when no image is displayed.

[0078] The display panel 200 can be bent with a predetermined radius of curvature. In an embodiment, for example, the radius of curvature of the display panel 200 can be set on a plane defined by a straight line in a first direction (x-axis direction) and a straight line in a third direction (z-axis direction). The distance between the straight line passing through the origin of the radius of curvature of the display panel 200 in the second direction (y-axis direction) and the display panel 200 can be the radius of curvature. The display panel 200 can be a flexible display panel that can be easily bent, folded, or rolled up.

[0079] As the display device 10 becomes larger, there may be a difference between the viewing angle when a user views the central area of ​​the display area DA of the display device 10 and the viewing angle when the user views the left and right ends of the display area DA of the display device 10. The viewing angle can be defined by the user's line of sight and the tangent of the display device 10. The viewing angle difference of the display device 10 can be reduced by bending the display device 10 along a predetermined curvature. In an embodiment, for example, the display device 10 can be bent to be concave towards the user.

[0080] Display panel 200 may include a display area DA and a non-display area NDA. The display area DA may include data lines, scan lines, power supply lines, and a plurality of pixels SP connected to the respective data lines and scan lines. In an embodiment, for example, scan lines may extend in a first direction (x-axis direction) and be spaced apart from each other in a second direction (y-axis direction). Data lines and power supply lines may extend in the second direction (y-axis direction) and be spaced apart from each other in the first direction (x-axis direction).

[0081] Each pixel SP can be connected to at least one scan line, at least one data line, and at least one power supply voltage line. Each pixel SP may include a thin-film transistor, a light-emitting element, and a capacitor. The thin-film transistor includes a driving transistor and at least one switching transistor. When a scan signal is applied from the scan line, each pixel SP receives a data voltage from the data line and provides a driving current to the light-emitting element according to the data voltage applied to the gate electrode, thereby emitting light.

[0082] The non-display area NDA can be positioned at the edge of the display panel 200 to surround the display area DA. The non-display area NDA may include a scan driver (not shown) that applies scan signals to scan lines and pads (not shown) connected to the circuit board 210.

[0083] The display panel 200 may include a circuit board 210 and a display driver 220.

[0084] An anisotropic conductive film (“ACF”) can be used to attach the circuit board 210 to the pads on the display panel 200. The leads of the circuit board 210 can be electrically connected to the pads of the display panel 200. The circuit board 210 can be a flexible printed circuit board (“FPCB”), a printed circuit board (“PCB”), or a flexible film such as a chip on film (“COF”).

[0085] Display driver 220 may be disposed on circuit board 210. Display driver 220 may output signals and voltages for driving display panel 200. Display driver 220 may provide data voltage to data lines. Display driver 220 may provide power voltage to power lines and may provide scan control signals to scan driver. In an embodiment, for example, display driver 220 may be disposed (e.g., mounted) on circuit board 210 and connected to pads of display panel 200. Display driver 220 may be implemented as an integrated circuit (“C”) and may be disposed in the non-display area NDA of display panel 200 by means of chip-on-glass (“COG”) technology, chip-on-plastic (“COP”) technology, or ultrasonic bonding.

[0086] A stereo lens 300 can be disposed on a display panel 200. The stereo lens 300 can be attached to the surface of the display panel 200 via an adhesive member. The stereo lens 300 and the display panel 200 can be attached together via a panel bonding device. In one embodiment, for example, the stereo lens 300 can be implemented as a biconvex lens comprising a plurality of lenses 320. In another embodiment, for example, the stereo lens 300 can be implemented as a liquid crystal lens that controls the liquid crystal of a liquid crystal layer to form a lens. When the stereo lens 300 is implemented as a biconvex lens, the stereo lens 300 may include a substrate 310 and a plurality of lenses 320.

[0087] The substrate 310 can be directly disposed on the top surface of the display panel 200. In an embodiment, for example, the surface of the substrate 310 can face the display panel 200, and the opposing surface of the substrate 310 can face the plurality of lenses 320. The substrate 310 can be bent with a predetermined radius of curvature. In an embodiment, for example, the stereo lens 300 can be attached to the display panel 200 and then bent with a predetermined radius of curvature. In an alternative embodiment, each of the stereo lens 300 and the display panel 200 can be bent and then attached together by a panel bonding device. In an embodiment, the radius of curvature of the substrate 310 can be set on a plane defined by a straight line in a first direction (x-axis direction) and a straight line in a third direction (z-axis direction). The distance between the straight line passing through the origin of the radius of curvature of the substrate 310 in the second direction (y-axis direction) and the substrate 310 can be the radius of curvature.

[0088] Light incident from the display panel 200 can pass through the substrate 310 without change. The direction of light passing through the surface of the substrate 310 can be the same as the direction of light passing through the opposite surface of the substrate 310. The substrate 310 can be integrated with multiple lenses 320, but is not limited to this.

[0089] Multiple lenses 320 can be disposed on the substrate 310 to change the direction of light incident from the display panel 200. Light incident from the display panel 200 can pass through the substrate 310 to reach the multiple lenses 320. The multiple lenses 320 can be tilted from one side of the display panel 200. In an embodiment, for example, the multiple lenses 320 can be tilted lenses, which are tilted at a predetermined angle from the side of each of the multiple pixels SP of the display panel 200. The predetermined angle can be designed to prevent the viewer from perceiving color lines in the display device 10.

[0090] The plurality of lenses 320 may be integral with the substrate 310. In one embodiment, for example, the plurality of lenses 320 may be imprinted on the top surface of the substrate 310. The plurality of lenses 320 may be, but is not limited to, semi-cylindrical lenses. In another embodiment, for example, the plurality of lenses 320 may be implemented as Fresnel lenses. In yet another embodiment, the plurality of lenses 320 may be manufactured separately from the substrate 310 and then attached to the substrate 310.

[0091] The cover frame 900 can cover the side and bottom surfaces of the display panel 200. The cover frame 900 can form the exterior of the display device 10 on the side and bottom surfaces. In embodiments, for example, the cover frame 900 can include at least one of plastic and metal.

[0092] Figure 4 It is a view that shows multiple video areas provided by a display device.

[0093] Reference Figure 4 The display panel 200 may include a light-emitting layer E. Each of the pixels SP of the display panel 200 may emit light using the light-emitting layer E. Each of a plurality of lenses 320 may be spaced apart from the light-emitting layer E of the display panel 200 by a predetermined distance. In the following description, the distance between each of the plurality of lenses 320 and the light-emitting layer E of the display panel 200 is defined as the lens-pixel distance L. In an embodiment, for example, the lens-pixel distance L may be substantially equal to the sum of the thickness of the layer of the display panel 200 disposed on the light-emitting layer E and the thickness of the substrate 310 of the stereoscopic lens 300. The display panel 200 may include at least one of a cathode electrode, an encapsulation layer, an encapsulation substrate, and a polarizing film disposed between the light-emitting layer E and the substrate 310.

[0094] The display device 10 can adjust the viewing distance D by adjusting the lens-pixel distance L. The display device 10 may include multiple video regions VZ positioned at the optimal viewing distance D. In some embodiments, for example, the display device 10 may include a first video region V1, a second video region V2, and a third video region V3, but the number of video regions VZ is not limited to three. The display device 10 can display stereoscopic images by displaying different images on the multiple video regions VZ.

[0095] Figure 5 This is a cross-sectional view illustrating an embodiment of the pixel structure of a display device according to the present invention.

[0096] Reference Figure 5 The display panel 200 may include a first substrate SUB1, a plurality of thin film transistors (TFTs), a gate insulating layer (GI), an interlayer dielectric layer (ILD), a passivation layer (PAS), a planarization layer (OC), a pixel defining layer (PDL), a plurality of light-emitting elements (ELs), an encapsulation layer (TFEL), and a second substrate SUB2.

[0097] The first substrate SUB1 may be a base substrate and may include an insulating material, such as a polymer resin. In embodiments, for example, the first substrate SUB1 may be a flexible substrate that can be bent, folded, or rolled up. When the substrate is a flexible substrate, it may include, but is not limited to, polyimide (“PI”).

[0098] Multiple thin-film transistors (TFTs) can be disposed on a first substrate SUB1 to form a pixel circuit of multiple pixels SP. In an embodiment, for example, each of the multiple TFTs can be a driving transistor or a switching transistor of the pixel circuit. Each of the multiple TFTs may include a semiconductor layer ACT, a gate electrode GE, a source electrode SE, and a drain electrode DE.

[0099] The semiconductor layer ACT can be disposed on the first substrate SUB1. The semiconductor layer ACT can overlap with the gate electrode GE, the source electrode SE, and the drain electrode DE. The semiconductor layer ACT can be in direct contact with the source electrode SE and the drain electrode DE, and can face the gate electrode GE, with the gate insulating layer GI between the semiconductor layer ACT and the gate electrode GE.

[0100] The gate electrode GE can be disposed on the gate insulating layer GI. The gate electrode GE can overlap with the semiconductor layer ACT, and the gate insulating layer GI is located between the semiconductor layer ACT and the gate electrode GE.

[0101] The source electrode SE and drain electrode DE are disposed on the interlayer dielectric layer ILD such that they are spaced apart from each other. The source electrode SE can contact one end of the semiconductor layer ACT through contact holes defined in the gate insulating layer GI and the interlayer dielectric layer ILD. The drain electrode DE can contact the other end of the semiconductor layer ACT through contact holes defined in the gate insulating layer GI and the interlayer dielectric layer ILD. The drain electrode DE can be connected to the anode electrode AND of the light-emitting element EL.

[0102] A gate insulating layer GI can be disposed on the semiconductor layer ACT. In an embodiment, for example, the gate insulating layer GI can cover the semiconductor layer ACT and the first substrate SUB1, and can insulate the semiconductor layer ACT from the gate electrode GE. The gate insulating layer GI may include contact holes through which the source electrode SE passes and contact holes through which the drain electrode DE passes.

[0103] An interlayer dielectric layer (ILD) can be disposed above the gate electrode GE. In an embodiment, for example, the ILD may include contact holes through which the source electrode SE passes and contact holes through which the drain electrode DE passes. The contact holes of the ILD may be connected to the contact holes of the gate insulating layer GI.

[0104] A passivation layer PAS can be disposed on multiple thin-film transistor TFTs to protect them. In an embodiment, for example, the contact hole through which the anode electrode AND of the light-emitting element EL passes can be defined in the passivation layer PAS.

[0105] A planarization layer OC can be disposed on a passivation layer PAS to provide a flat surface above a thin-film transistor (TFT). In an embodiment, for example, a contact hole through which the anode electrode AND of the light-emitting element EL passes can be defined in the planarization layer OC.

[0106] The light-emitting element EL can be disposed on the planarization layer OC. The light-emitting element EL may include an anode electrode AND, a light-emitting layer E, and a cathode electrode CAT.

[0107] The anode electrode AND can be disposed on the planarization layer OC. In an embodiment, for example, the anode electrode AND can overlap with an opening defined by the pixel defining layer PDL. The anode electrode AND can be connected to the drain electrode DE of the thin-film transistor TFT.

[0108] The light-emitting layer E can be disposed on the anode electrode AND. The light-emitting layer E may include a hole injection layer, a hole transport layer, a light receiving layer, an electron blocking layer, an electron transport layer, and so on. In embodiments, for example, the light-emitting layer E may be, but is not limited to, an organic emitting layer comprising organic materials. When the light-emitting layer E is an organic emitting layer, the thin-film transistor (TFT) can apply a predetermined voltage to the anode electrode AND of the light-emitting element EL, and the cathode electrode CAT of the light-emitting element EL can receive a common voltage or a cathode voltage. Furthermore, holes and electrons can move to the light-emitting layer (e.g., the organic emitting layer) E through the hole transport layer and the electron transport layer, respectively, and holes and electrons can recombine with each other in the light-emitting layer (e.g., the organic emitting layer) E to emit light.

[0109] In the following description, the pixel center PP is defined as the center of the top surface of the light-emitting layer E of each of the plurality of pixels SP. In an implementation, for example, the lens-pixel distance L may be substantially equal to the distance between each of the plurality of lenses 320 and the pixel center PP.

[0110] The cathode electrode CAT can be disposed on the light-emitting layer E. In one embodiment, for example, the cathode electrode CAT can be implemented as an electrode shared by all pixels SP, rather than being a separate electrode for each of the pixels SP. In another embodiment, for example, the cathode electrode CAT can be disposed on the light-emitting layer E within an opening, and can be disposed on the pixel defining layer PDL in the area outside the opening.

[0111] A pixel-defining layer (PDL) can define an opening. The PDL can separate and insulate the anode AND of one of a plurality of light-emitting elements (ELs) from the anode AND of another plurality of light-emitting elements (ELs).

[0112] The TFEL encapsulation layer can be placed on the cathode electrode CAT to cover the light-emitting element EL. The TFEL encapsulation layer can prevent oxygen or moisture from penetrating into the light-emitting element EL.

[0113] The second substrate SUB2 is disposed on the encapsulation layer TFEL to protect the display panel 200. In an embodiment, for example, the second substrate SUB2 may be a flexible substrate that can be bent, folded, or rolled up.

[0114] In some embodiments, for example, the display panel 200 may further include a polarizing film (not shown) disposed on a second substrate SUB2. The polarizing film may be disposed on the second substrate SUB2 to prevent reflection of external light, which could otherwise degrade visibility. The polarizing film may include a linear polarizer and a phase retardation film such as a λ / 4 plate (quarter-wave plate). In some embodiments, for example, the phase retardation film may be disposed on the second substrate SUB2, and the linear polarizer may be disposed between the phase retardation film and the stereoscopic lens 300.

[0115] Figure 6 This is a cross-sectional view illustrating an embodiment of the display device according to the present invention. Figure 7 It is shown Figure 6 A cross-sectional view of a portion of the display device.

[0116] Reference Figure 6 and Figure 7 The display device 10_1 may include a curved display panel 200 and a stereo lens 300 disposed on the display panel 200. The display panel 200 may include a self-emissive light-emitting layer E. The display panel 200 has a constant thickness and can be bent along the curvature of the stereo lens 300. The stereo lens 300 may be disposed on the display panel 200 and bent with a predetermined radius of curvature.

[0117] The thickness T1 of the substrate 310 of the stereo lens 300 can increase with increasing distance from the center of the stereo lens 300. In an embodiment, for example, the curved stereo lens 300 can be symmetrical about the center of the stereo lens 300 in the horizontal direction. The thickness of the substrate 310 can increase or decrease in the direction of the stereo lens 300, and the thickness of the display panel 200 can be uniform. In an embodiment, for example, the lens-pixel distance L can be substantially equal to the sum of the thickness T1 of the substrate 310 and the thickness T2 of the layer LL disposed on the light-emitting layer E of the display panel 200. In the following description, the layer disposed on the light-emitting layer E of the display panel 200 is defined as the upper panel layer LL. Therefore, the lens-pixel distance L can be substantially equal to the sum of the thickness T1 of the substrate 310 and the thickness T2 of the upper panel layer LL. Since the thickness of the upper panel layer LL does not change, the lens-pixel distance L can be increased or decreased by the thickness T1 of the substrate 310.

[0118] In one embodiment, for example, the upper panel layer LL may include a cathode electrode CAT, an encapsulation layer TFEL, and a second substrate SUB2. In another embodiment, the upper panel layer LL may also include a polarizing film. Therefore, the upper panel layer LL may refer to a layer of the display panel 200 disposed on the light-emitting layer E, regardless of the configuration of the display panel 200.

[0119] The thickness T1 of the substrate 310 of the stereo lens 300 can be determined based on the refractive index of the substrate 310, the refractive index between the light-emitting layer E and the substrate 310 or the refractive index of the upper panel layer LL, the distance between the light-emitting layer E and the substrate 310 or the thickness T2 of the upper panel layer LL, the refractive index of the plurality of lenses 320, the thickness T3 of each of the plurality of lenses 320, and the object distance of each of the plurality of lenses 320. In an embodiment, for example, the thickness T1 of the substrate 310 of the stereo lens 300 can be calculated using the following Equation 1:

[0120] [Equation 1]

[0121]

[0122] Wherein, T1 represents the thickness of the substrate 310 of the stereoscopic lens 300, n1 represents the refractive index of the substrate 310, d1 represents the object distance of each of the lenses 320, T2 represents the distance between the light-emitting layer E and the substrate 310 or the thickness of the upper panel layer LL, n2 represents the refractive index between the light-emitting layer E and the substrate 310 or the refractive index of the upper panel layer LL, T3 represents the thickness of each of the lenses 320, and n3 represents the refractive index of the lens 320. Therefore, when the substrate 310 of the stereoscopic lens 300 has different thicknesses T1, the display device 10_1 can control the light emission angle of each of the multiple lenses 320. The display device 10_1 can focus the light emitted from each of the multiple lenses 320 onto the target observation point, and the viewer can enjoy the stereoscopic image on the curved display device 10_1.

[0123] The lens-pixel distance L between each of the plurality of lenses 320 and the light-emitting layer E can increase with increasing distance from the center of the display panel 200. In an embodiment, the curved display panel 200 can be, for example, symmetrical with respect to the center of the display panel 200 in the horizontal direction. The lens-pixel distance L of each of the plurality of lenses 320 can increase with increasing distance from the center of the display panel 200 or the center of the stereo lens 300. The plurality of lenses 320 can include first lenses 320-1 to nth lenses 320-n, where n is a natural number. The lens-pixel distance Ln of the nth lens 320-n can be greater than the lens-pixel distance Ln-1 of the (n-1)th lens 320-(n-1). The lens-pixel distance L2 of the second lens 320-2 can be greater than the lens-pixel distance L1 of the first lens 320-1. Since the lenses 320 of the display device 10_1 have different lens-pixel distances L, the light emission angle of each of the lenses 320 can be controlled. Therefore, when the display device 10_1 is implemented as a curved display device, the light emission angle of each of the multiple lenses 320 can be controlled, and the observation points of the multiple lenses 320 can be matched to display a stereoscopic image. The display device 10_1 can focus the observation points of the multiple lenses 320 onto the target observation point, thereby forming a video area VZ or viewing area. The display device 10_1 can focus the light emitted from each of the multiple lenses 320 onto the target observation point, and the viewer can enjoy the stereoscopic image on the curved display device 10_1.

[0124] The surface radius of curvature of each of the plurality of lenses 320 can increase with increasing distance from the center of the stereoscopic lens 300. In an embodiment, for example, the curved stereoscopic lens 300 can be symmetrical about the center of the stereoscopic lens 300 in the horizontal direction. The plurality of lenses 320 may include first lenses 320-1 to nth lenses 320-n. The surface radius of curvature of the nth lens 320-n can be greater than the surface radius of curvature of the (n-1)th lens 320-(n-1). The surface radius of curvature of the second lens 320-2 can be greater than the surface radius of curvature of the first lens 320-1. Since the lenses 320 of the display device 10_1 have different radii of curvature, the light emission angle of each of the lenses 320 can be controlled. Therefore, when the display device 10_1 is implemented as a curved display device, the light emission angle of each of the plurality of lenses 320 can be controlled, and the observation points of the plurality of lenses 320 can be matched to display a stereoscopic image. Display device 10_1 can focus the observation points of multiple lenses 320 onto a target observation point, thereby forming a video area VZ or viewing area. Display device 10_1 can focus light emitted from each of the multiple lenses 320 onto the target observation point, and the viewer can enjoy a stereoscopic image on the curved display device 10_1.

[0125] The thickness T3 of each of the plurality of lenses 320 can decrease as the distance from the center of the stereoscopic lens 300 increases. In an embodiment, for example, the thickness of each of the plurality of lenses 320 can be inversely proportional to its surface radius of curvature. However, it should be understood that the invention is not limited thereto. The plurality of lenses 320 may include first lenses 320-1 to nth lenses 320-n. The thickness T3 of the nth lens 320-n can be less than the thickness T3 of the (n-1)th lens 320-(n-1). The thickness T3 of the second lens 320-2 can be less than the thickness T3 of the first lens 320-1. Since the lenses 320 of the display device 10_1 have different thicknesses T3, the light emission angle of each of the lenses 320 can be controlled. Therefore, when the display device 10_1 is implemented as a curved display device, the light emission angle of each of the plurality of lenses 320 can be controlled, and the observation points of the plurality of lenses 320 can be matched to display a stereoscopic image. Display device 10_1 can focus the observation points of multiple lenses 320 onto a target observation point, thereby forming a video area VZ or viewing area. Display device 10_1 can focus light emitted from each of the multiple lenses 320 onto the target observation point, and the viewer can enjoy a stereoscopic image on the curved display device 10_1.

[0126] The thickness T3 of each of the plurality of lenses 320 can be determined based on the surface radius of curvature and the lens spacing of the plurality of lenses 320. Here, the lens spacing can refer to the distance between the lens centers of adjacent lenses. In an embodiment, for example, the thickness T3 of each of the plurality of lenses 320 can be calculated using the following Equation 2:

[0127] [Equation 2]

[0128]

[0129] Where T3 represents the thickness of each of the plurality of lenses 320, R1 represents the surface radius of curvature of each of the plurality of lenses 320, and P represents the lens spacing. Therefore, since the lenses 320 of the display device 10_1 have different thicknesses T3, the light emission angle of each of the lenses 320 can be controlled. The display device 10_1 can focus the light emitted from each of the plurality of lenses 320 onto the target observation point, and the viewer can enjoy a stereoscopic image on the curved display device 10_1.

[0130] Figure 8 This is a diagram illustrating an embodiment of the target observation point and the actual observation point of the radius of curvature of a stereo lens in a display device according to the present invention. Figure 9 This is a diagram illustrating an embodiment of the process of matching an actual observation point with a target observation point in a display device according to the present invention. (In conjunction with...) Figure 3 refer to Figure 8 , Figure 8 The horizontal direction of the coordinates can correspond to Figure 3 The first direction (x-axis direction), and Figure 8 The vertical direction of the coordinates can correspond to Figure 3 The third direction (z-axis direction).

[0131] Reference Figure 8 and Figure 9 The stereo lens 300 of the display device 10_1 can be disposed on the display panel 200 and bent with a predetermined radius of curvature R. The top surface of the base 310 of the stereo lens 300 can be disposed along a curve with a radius of curvature R spaced apart from the origin O. Figure 8 In this design, before the stereo lens 300 is bent, its lens center can be located at coordinates (Q, 0). After the stereo lens 300 is bent with a radius of curvature R, its lens center PL can be located at coordinates (R×sinθ, RR×cosθ). The lens center PL on the curved surface can be located at a position spaced from the origin O by the radius of curvature R at a first angle θ. The distance between the lens center PL of the stereo lens 300 and the lens center CL on the reference line of the stereo lens 300 can be approximately equal to Q. In this design, the reference line can extend from the origin O in a direction of 0 degrees (θ=0). The stereo lens 300 can be symmetrical with respect to the reference line in the horizontal direction. Therefore, the lens center CL on the reference line can be located at the center of the stereo lens 300.

[0132] Before the stereo lens 300 bends, the lens 320 can emit light in the direction of the second angle α at coordinate (Q, 0). After the stereo lens 300 bends, the lens center PL of the lens 320 on the curved surface tilts by a first angle θ, and the lens 320 can emit light in the direction of the sum of the first angle θ and the second angle α (θ+α). The lens 320, which emits light towards the target observation point PD before the stereo lens 300 bends, can emit light towards the actual observation point PD' after the stereo lens 300 bends. The second angle α that matches the actual observation point PD' with the target observation point PD after the stereo lens 300 bends can be calculated.

[0133] The second angle α can be calculated based on the radius of curvature R of the stereo lens 300, the first angle θ, the second angle α, and the distance Q between the lens center CL on the reference line of the stereo lens 300 and the lens center PL of the stereo lens 300. In an implementation, for example, the second angle α matching the actual observation point PD' and the target observation point PD can be calculated using the following Equation 3:

[0134] [Equation 3]

[0135]

[0136] In the implementation, for example, the left side of Equation 3 can represent the y-axis coordinate value of the actual observation point PD', and the right side of Equation 3 can represent the y-axis coordinate value of the target observation point PD, where R represents the radius of curvature of the stereo lens 300, θ represents the angle of the first angle or the angle of the straight line between the lens center PL on the curved surface and the origin O, α represents the second angle or the angle of the straight line between the coordinates (Q, 0) of the lens center before the lens is bent and the target observation point PD, and Q represents the distance between the lens center CL on the reference line of the stereo lens 300 and the lens center PL of the stereo lens 300 or the x-axis coordinate value of the lens center before the stereo lens 300 is bent.

[0137] In the display device 10_1, a lens-pixel distance L that satisfies the second angle α that matches the actual observation point PD' with the target observation point PD can be calculated. Therefore, since the lenses 320 of the display device 10_1 have different lens-pixel distances L, the light emission angle of each of the lenses 320 can be controlled. Thus, when the display device 10_1 is implemented as a curved display device, the light emission angle of each of the multiple lenses 320 can be controlled, and the observation points of the multiple lenses 320 can be matched to display a stereoscopic image. The display device 10_1 can focus the observation points of the multiple lenses 320 onto the target observation point PD, thereby forming a video area VZ or a viewing area. The display device 10_1 can focus light emitted from each of the multiple lenses 320 onto the target observation point PD, and the viewer can enjoy the stereoscopic image on the curved display device 10_1.

[0138] Figure 10 The diagram shows an embodiment of a video region formed by the outermost lens and a video region formed by the central lens that overlap each other in a display device according to the invention.

[0139] Reference Figure 10The video regions VZ of the plurality of lenses 320 in the display device 10_1 can overlap each other. The width of the video region VZ of each of the plurality of lenses 320 can decrease as the distance from the lens center CL of the stereoscopic lens 300 increases. The plurality of lenses 320 may include first lenses 320-1 to nth lenses 320-n. In an embodiment, for example, the length of the video region (image of 320-1) of the first lens 320-1 on the x-axis can exceed 20 mm, but the length of the video region (image of 320-n) of the nth lens 320-n on the x-axis can be less than 10 mm. The center of the video region (image of 320-1) of the first lens 320-1 can be adjacent to the center of the video region (image of 320-n) of the nth lens 320-n. Therefore, the display device 10_1 can display a stereoscopic image by matching the observation points or video regions of the plurality of lenses 320 with each other.

[0140] Figure 11 This is a flowchart illustrating an embodiment of the process for calculating the lens-pixel distance in a display device according to the present invention.

[0141] Reference Figure 11 The stereo lens 300 of the display device 10_1 can be disposed on the display panel 200 and bent with a predetermined radius of curvature R. After the stereo lens 300 is bent with the radius of curvature R, the lens center PL of the stereo lens 300 can be set at coordinates (R×sinθ, RR×cosθ). The lens center PL can be set at a position that is spaced from the origin O by a first angle θ from the radius of curvature R. Therefore, the radius of curvature R and the first angle θ can be measured based on the distance and angle between the lens center PL and the origin O (operation S110).

[0142] The lens center PL of the stereo lens 300 can be measured based on the radius of curvature R and the first angle θ (operation S120). In an embodiment, for example, after the stereo lens 300 is bent with a radius of curvature R, the lens center PL of the stereo lens 300 can be set at coordinates (R×sinθ, RR×cosθ).

[0143] Before the stereo lens 300 bends, the lens 320 can emit light in the direction of the second angle α at coordinate (Q, 0). After the stereo lens 300 bends, the lens center PL of the lens 320 tilts at a first angle θ, and the lens 320 can emit light in the direction of the sum of the first angle θ and the second angle α (θ+α). The lens 320, which emits light towards the target observation point PD before the stereo lens 300 bends, can emit light towards the actual observation point PD' after the stereo lens 300 bends. The distance between the target observation point PD and the lens center CL of the stereo lens 300 can be the target observation distance D, and the distance between the actual observation point PD' and the lens center CL of the stereo lens 300 can be the actual observation distance D'. Therefore, the target observation distance D and the actual observation distance D' can be calculated using the target observation point PD and the actual observation point PD' (operation S130).

[0144] Equation 3 can be used to calculate the second angle α that matches the actual observation point PD' with the target observation point PD (operation S140). In an implementation, for example, the left side of Equation 3 may correspond to the y-axis coordinate value of the actual observation point PD', and the right side of Equation 3 may correspond to the y-axis coordinate value of the target observation point PD.

[0145] In the display device 10_1, the lens-pixel distance L that satisfies the second angle α that matches the actual observation point PD' and the target observation point PD can be calculated (operation S150). Therefore, since the lenses 320 of the display device 10_1 have different lens-pixel distances L, the light emission angle of each of the lenses 320 can be controlled. Therefore, when the display device 10_1 is implemented as a curved display device, the light emission angle of each of the multiple lenses 320 can be controlled, and the observation points of the multiple lenses 320 can be matched, thereby displaying a stereoscopic image.

[0146] Figure 12 This is a cross-sectional view illustrating another embodiment of the display device according to the present invention.

[0147] Reference Figure 12 The display device 10_2 may include a curved display panel 200 bent at a predetermined radius of curvature R and a stereo lens 300 disposed on the display panel 200. The display panel 200 may include a self-emissive light-emitting layer E. The display panel 200 has a constant thickness and can be bent at a predetermined radius of curvature R. The stereo lens 300 may be disposed on the display panel 200 and bent along the curvature of the display panel 200.

[0148] The lens spacing P of the stereoscopic lenses 300 can be substantially all equal. In an embodiment, for example, each of the lens spacings P can be substantially equal to the distance between the lens centers of adjacent lenses 320. The plurality of lenses 320 can include first lenses 320-1 to nth lenses 320-n. The lens spacing P between the nth lens 320-n and the (n-1)th lens 320-(n-1) can be substantially equal to the lens spacing P between the (n-1)th lens 320-(n-1) and the (n-2)th lens 320-(n-2). The lens spacing P between the third lens 320-3 and the second lens 320-2 can be substantially equal to the lens spacing P between the second lens 320-2 and the first lens 320-1. Therefore, the display device 10_2 can have a lens spacing PL (reference) extending through the center of the outermost lens. Figure 13A and Figure 13B ) and the pixel center PP of the display panel 200 corresponding to the center PL of the outermost lens (reference) Figure 13A and Figure 13B And reach the target observation point PD (reference) Figure 14 and Figure 15 The display device 10_2 may have an extension line that passes through the center of each of the multiple lenses 320 and the pixel center of the display panel 200 corresponding to the center of the lens, and reaches the target observation point PD.

[0149] Because the display device 10_2 is implemented as a curved display device, the observation points of the multiple lenses 320 can be matched to display a stereoscopic image. The display device 10_2 can focus the observation points of the multiple lenses 320 onto the target observation point PD, thereby forming a video area VZ or viewing area. The display device 10_2 can focus light emitted from each of the multiple lenses 320 onto the target observation point PD, and the viewer can enjoy the stereoscopic image on the curved display device 10_2.

[0150] Lenses 320 may have the same surface radius of curvature. The lens center of lens 320 may be located on a curve with a predetermined radius of curvature. The lens center of lens 320 may be located on the upper surface of the curved substrate 310. Lenses 320 may have the same thickness, and the thickness of the substrate 310 of the stereo lens 300 may be uniform.

[0151] Figure 13A This is a diagram illustrating another embodiment of the arrangement of the target viewing point, lens center, and pixel center in a display device, and Figure 13B yes Figure 13A An enlarged view of a portion of the display device. Figure 14 This is a diagram illustrating another embodiment of the distance between the center of the central pixel and the center of the outermost pixel in a display device. Figure 15This is a diagram illustrating another embodiment of the distance between the center of the central lens and the center of the outermost lens in a display device.

[0152] Reference Figures 13A to 15 The display device 10_2 may include a curved display panel 200 bent at a predetermined radius of curvature R and a stereo lens 300 disposed on the display panel 200. The display panel 200 may include a self-emissive light-emitting layer E. The display panel 200 has a constant thickness and can be bent at a predetermined radius of curvature R. The stereo lens 300 may be disposed on the display panel 200 and bent along the curvature of the display panel 200.

[0153] The lens spacing P can be determined based on the length B of the lens region of the stereo lens 300 and the number of lenses 320. In one embodiment, for example, the length B of the lens region of the stereo lens 300 can be defined as the length of a curve from the center PL of the outermost lens adjacent to one edge of the stereo lens 300 to the center PL of the outermost lens adjacent to the other edge of the stereo lens 300. In an alternative embodiment, the length B of the lens region of the stereo lens 300 can be substantially equal to twice the length between the center PL of the outermost lens adjacent to one edge of the stereo lens 300 and the center CL of the lens on the reference line (B / 2 = CL ~ PL).

[0154] In the display device 10_2, the second angle α can be calculated based on the radius of curvature R of the display panel 200, the first angle θ, and the distance D' between the target viewing point PD of the display panel 200 and the pixel center PP. In an embodiment, for example, the second angle α can be calculated using the following equation 4:

[0155] [Equation 4]

[0156]

[0157] Wherein, α represents the second angle or the angle between the straight line passing through the target observation point PD and the center of the outermost lens PL and the reference line passing through the origin O, R represents the radius of curvature of the display panel 200, θ represents the first angle or the angle between the straight line passing through the origin O and the pixel center PP of the display panel 200 corresponding to the center of the outermost lens PL and the reference line passing through the origin O, and D' represents the distance between the target observation point PD and the pixel center PP of the display panel 200.

[0158] In the display device 10_2, the third angle β can be calculated based on the radius of curvature R of the display panel 200, the lens-pixel distance L, the distance D between the target observation point PD and the lens center CL on the reference line, and the second angle α. In an embodiment, for example, the third angle β can be calculated using the following equation 5:

[0159] [Equation 5]

[0160]

[0161] Where R represents the radius of curvature of the display panel 200, L represents the lens-pixel distance, D represents the distance between the target observation point PD and the lens center CL on the reference line, α represents the second angle or the angle between the straight line passing through the target observation point PD and the outermost lens center PL and the reference line passing through the origin O, and β represents the third angle or the angle between the straight line passing through the origin O and the outermost lens center PL with the radius of curvature R and the straight line passing through the target observation point PD and the outermost lens center PL.

[0162] In the display device 10_2, the fourth angle θ' (θ' = α - β) can be calculated using the calculated second angle α and third angle β.

[0163] In the display device 10_2, the length B of the lens region of the stereo lens 300 can be calculated based on the distance RL between the origin O of the radius of curvature R of the display panel 200 and the center PL of the outermost lens, and the fourth angle θ'. In an embodiment, for example, the length B of the lens region of the stereo lens 300 can be calculated using the following equation 6:

[0164] [Equation 6]

[0165] B=2(RL)θ′

[0166] Where B represents the length of the lens area, RL represents the distance between the origin O of the radius of curvature R of the display panel 200 and the center PL of the outermost lens, and θ' represents the fourth angle or the angle formed by the straight line (O~PL) between the origin O of the radius of curvature R of the display panel 200 and the center PL of the outermost lens and the reference line (O~CL) passing through the origin O of the radius of curvature R of the display panel 200 and the center CL of the lens.

[0167] In the display device 10_2, the lens spacing P can be calculated by dividing the length B of the lens region by the number of lenses 320. When the lens spacing P is substantially equal, the display device 10_2 can have an extension line passing through the lens center PL of each of the lenses 320 and the pixel center PP of the display panel 200 corresponding to the lens center PL, reaching the target viewing point PD. Therefore, when the display device 10_2 is implemented as a curved display device, the viewing points of the multiple lenses 320 can be matched to display a stereoscopic image. The display device 10_2 can focus the viewing points of the multiple lenses 320 onto the target viewing point PD, thereby forming a video area VZ or viewing area. The display device 10_2 can focus light emitted from each of the multiple lenses 320 onto the target viewing point PD, and the viewer can enjoy the stereoscopic image on the curved display device 10_2.

[0168] Figure 16 This is a flowchart illustrating another embodiment of the process for calculating the lens spacing in a display device according to the present invention.

[0169] Reference Figure 16 The system can measure the pixel distance A / 2 on the curved surface, the radius of curvature R of the display panel 200, and the target viewing distance D (operation S210). The pixel distance A / 2 on the curved surface can be defined as the distance on the curved surface between the center CP of the display panel 200 and the pixel center PP corresponding to the center PL of the outermost lens. The target viewing distance D can be defined as the distance between the target viewing point PD and the lens center CL of the stereo lens 300.

[0170] The first angle θ (R×θ=A / 2) can be calculated using the pixel distance A / 2 on the curved surface and the radius of curvature R of the display panel 200 (operation S220).

[0171] The distance D' between the target observation point PD and the pixel center PP of the display panel 200 can be calculated (operation S230).

[0172] As shown in Equation 4 above, the second angle α can be calculated based on the radius of curvature R of the display panel 200, the first angle θ, and the distance D' between the target observation point PD of the display panel 200 and the pixel center PP (operation S240).

[0173] As shown in Equation 5 above, the third angle β can be calculated using the radius of curvature R of the display panel 200, the lens-pixel distance L, the distance D between the target observation point PD and the lens center CL on the reference line, and the second angle α (operation S250).

[0174] The fourth angle θ' can be calculated using the second angle α and the third angle β (operation S260).

[0175] As shown in Equation 6 above, the length B of the lens region can be calculated using the distance RL between the origin O of the radius of curvature R of the display panel 200 and the center PL of the outermost lens, as well as the fourth angle θ' (operation S270).

[0176] In the display device 10_2, the multiple lens spacings P can be calculated by dividing the length B of the lens area by the number of multiple lenses 320 (operation S280). When the lens spacings P are all substantially equal, the display device 10_2 can have an extension line that passes through the lens center PL of each of the lenses 320 and the pixel center PP of the display panel 200 corresponding to the lens center PL and reaches the target observation point PD.

[0177] Figure 17 This is a cross-sectional view illustrating another embodiment of the display device according to the present invention. Figure 18 It is shown Figure 17 A cross-sectional view of a stereoscopic lens.

[0178] Reference Figure 17 and Figure 18 The display device 10_3 may include a curved display panel 200 bent with a predetermined radius of curvature R and a stereo lens 300 disposed on the display panel 200. The display panel 200 may include a self-emissive light-emitting layer E. The display panel 200 has a constant thickness and can be bent with a predetermined radius of curvature R. The stereo lens 300 may be disposed on the display panel 200 and bent along the curvature of the display panel 200.

[0179] As the lens center PL moves away from the center of the stereo lens 300, the plurality of lens spacings P of the stereo lens 300 can increase. In an embodiment, for example, each of the lens spacings P can be substantially equal to the distance between the lens centers PL of adjacent lenses 320. The plurality of lenses 320 can include first lenses 320-1 to nth lenses 320-n. In an embodiment, the plurality of lens spacings P can include lens spacing P2 between the first lens 320-1 and the second lens 320-2 to the nth lens spacing Pn between the nth lens 320-n and the (n-1)th lens 320-(n-1). The nth lens spacing Pn between the nth lens 320-n and the (n-1)th lens 320-(n-1) can be greater than the (n-1)th lens spacing Pn-1 between the (n-1)th lens 320-(n-1) and the (n-2)th lens 320-(n-2). In an implementation, for example, the nth lens spacing Pn can be substantially equal to the distance between the lens center PLn of the nth lens 320-n and the lens center PLn-1 of the (n-1)th lens 320-(n-1). The (n-1)th lens spacing Pn-1 can be substantially equal to the distance between the lens center PLn-1 of the (n-1)th lens 320-(n-1) and the lens center PLn-2 of the (n-2)th lens 320-(n-2). Therefore, the display device 10_3 can have an extension line that passes through the lens center PL of each of the plurality of lenses 320 and the pixel center PP of the display panel 200 corresponding to the lens center PL, and reaches the target observation point PD.

[0180] When the display device 10_3 is implemented as a curved display device, the observation points of the multiple lenses 320 can be matched to display a stereoscopic image. The display device 10_3 can focus the observation points of the multiple lenses 320 onto the target observation point PD, thereby forming a video area VZ or viewing area. The display device 10_3 can focus light emitted from each of the multiple lenses 320 onto the target observation point PD, and the viewer can enjoy the stereoscopic image on the curved display device 10_3.

[0181] Figure 19 This is a diagram illustrating another embodiment of the arrangement of the target viewing point, lens center, and pixel center in a display device. Figure 20 This is a diagram illustrating another embodiment of the process for calculating the coordinates of the center of a lens in a display device. (In conjunction with...) Figure 3 refer to Figure 19 , Figure 19 The x-axis of the coordinates can be compared with Figure 3 The first direction (x-axis direction) is opposite, and Figure 19 The y-axis of the coordinates can be parallel to Figure 3 The third direction (z-axis direction) is opposite.

[0182] Reference Figure 19 and Figure 20 The display device 10_3 may include a curved display panel 200 bent with a predetermined radius of curvature R and a stereo lens 300 disposed on the display panel 200. The display panel 200 may include a self-emissive light-emitting layer E. The display panel 200 has a constant thickness and can be bent with a predetermined radius of curvature R. The stereo lens 300 may be disposed on the display panel 200 and bent along the curvature of the display panel 200.

[0183] The radius of curvature R of the display panel 200 and the pixel distance A / 2 on the curved surface can be used (see...). Figure 13A The first angle θ (R×θ=A / 2) is calculated using this method. The first angle θ can be the slope of the straight line between the pixel center PP and the origin O of the radius of curvature R. The pixel distance A / 2 on the curved surface can be defined as the distance on the curved surface between the center CP of the display panel 200 and the pixel center PP on the curved surface.

[0184] The coordinates (x', y') of the pixel center PP can be calculated using the radius of curvature R and the first angle θ (x', y' = R × sinθ, R × cosθ).

[0185] In the display device 10_3, the second angle α can be calculated based on the x-axis coordinate (x') of the pixel center PP, the y-axis coordinate (y') of the pixel center PP, and the distance Y between the origin O and the target observation point PD. The second angle α can be defined as the angle between the straight line between the target observation point PD and the pixel center PP and a reference line passing through the origin O. In an embodiment, for example, the second angle α can be calculated using the following equation 7:

[0186] [Equation 7]

[0187]

[0188] Where α represents the second angle or the angle between the straight line passing through the target observation point PD and the pixel center PP and the reference line passing through the origin O, x' represents the x-axis coordinate of the pixel center PP, y' represents the y-axis coordinate of the pixel center PP, and Y represents the distance between the origin O and the target observation point PD.

[0189] In the display device 10_3, the third angle β can be calculated based on the second angle α, the radius of curvature R of the display panel 200, the lens-pixel distance L, and the distance Y between the origin O and the target observation point PD. In an embodiment, for example, the third angle β can be calculated using the following equation 8:

[0190] [Equation 8]

[0191]

[0192] Where β represents the third angle or the angle between the straight line passing through the origin O and the center PL of each of the lenses 320 through the radius of curvature R and the straight line passing through the target observation point PD and the center PL of the lens, α represents the second angle, R represents the radius of curvature, L represents the lens-pixel distance, and Y represents the distance between the origin O and the target observation point PD.

[0193] In an implementation, for example in a display device 10_3, the fourth angle θ' (θ' = α - β) can be calculated using the calculated second angle α and third angle β.

[0194] In another embodiment, in the display device 10_3, for example, the fourth angle θ' can be calculated based on the second angle α, the radius of curvature R of the display panel 200, the lens-pixel distance L, and the distance Y between the origin O and the target observation point PD. The fourth angle θ' can be calculated using the following equation 9:

[0195] [Equation 9]

[0196]

[0197] Where θ' represents the fourth angle or the angle between the straight line passing through the lens center PL and the origin O of the radius of curvature R of each of the lenses 320 and the reference line passing through the origin O of the radius of curvature R, α represents the second angle, R represents the radius of curvature, L represents the lens-pixel distance, and Y represents the distance between the origin O and the target observation point PD.

[0198] Because the lens spacing P is different from each other, the display device 10_3 can have an extension line passing through the lens center PL of each of the lenses 320 and the pixel center PP of the display panel 200 corresponding to the lens center PL, reaching the target viewing point PD. Therefore, when the display device 10_3 is implemented as a curved display device, the viewing points of the multiple lenses 320 can be matched to display a stereoscopic image. The display device 10_3 can focus the viewing points of the multiple lenses 320 onto the target viewing point PD, thereby forming a video area VZ or viewing area. The display device 10_3 can focus light emitted from each of the multiple lenses 320 onto the target viewing point PD, and the viewer can enjoy the stereoscopic image on the curved display device 10_3.

[0199] Figure 21 This is a flowchart illustrating another embodiment of the process for calculating the spacing between multiple lenses in a display device according to the present invention.

[0200] Reference Figure 21The pixel distance A / 2 on the curved surface and the radius of curvature R of the display panel 200 can be measured (operation S310). The pixel distance A / 2 on the curved surface can be defined as the distance on the curved surface between the center CP of the display panel 200 and the pixel center PP corresponding to the center PL of the outermost lens.

[0201] The first angle θ (R×θ=A / 2) can be calculated using the radius of curvature R of the display panel 200 and the pixel distance A / 2 on the curved surface (operation S320).

[0202] The coordinates (x', y') of the pixel center PP can be calculated using the radius of curvature R and the first angle θ (x', y' = R × sinθ, R × cosθ) (operation S330).

[0203] As shown in Equation 7 above, the second angle α can be calculated based on the x-axis coordinate (x') of the pixel center PP, the y-axis coordinate (y') of the pixel center PP, and the distance Y between the origin O and the target observation point PD (operation S340).

[0204] As shown in Equation 8 above, the third angle β can be calculated based on the second angle α, the radius of curvature R of the display panel 200, the lens-pixel distance L, and the distance Y between the origin O and the target observation point PD (operation S350).

[0205] The fourth angle θ' can be calculated using the second angle α and the third angle β (operation S360).

[0206] Display device 10_3 can calculate the coordinates (x, y) of the lens center PL on the curved surface (operation S370).

[0207] The lens spacing P can be calculated based on the coordinates of the lens center PL of each of the multiple lenses 320 (operation S380).

[0208] Since the lens spacing P is different from each other, the display device 10_3 can have an extension line that passes through the lens center PL of each of the lenses 320 and the pixel center PP of the display panel 200 corresponding to the lens center PL and reaches the target observation point PD.

Claims

1. A display device, including: The display panel includes a plurality of pixels, each of which includes a light-emitting layer; as well as Stereo lenses, including: A curved substrate is disposed on the surface of the display panel with a predetermined radius of curvature; and Multiple lenses are disposed on the curved substrate and tilted from one side of the display panel. The thickness of the curved substrate of the stereo lens increases with the distance from the center of the stereo lens.

2. The display device according to claim 1, wherein, The surface radius of curvature of each of the plurality of lenses increases with increasing distance from the center of the stereo lens.

3. The display device according to claim 1, wherein, The thickness of each of the plurality of lenses decreases as the distance from the center of the stereo lens increases.

4. The display device according to claim 1, wherein, The distance between the light-emitting layer and each of the plurality of lenses increases with the distance from the center of the display panel.

5. The display device according to claim 1, wherein, The video regions of each of the plurality of lenses overlap each other, and the width of the video region of each of the plurality of lenses decreases as the distance from the center of the stereoscopic lens increases.

6. The display device according to claim 1, wherein, The thickness of the curved substrate of the stereo lens is determined based on the refractive index of the curved substrate, the refractive index between the light-emitting layer and the curved substrate, the distance between the light-emitting layer and the curved substrate, the refractive index of the plurality of lenses, the thickness of each of the plurality of lenses, and the object distance of each of the plurality of lenses.

7. The display device according to claim 6, wherein, The thickness of the curved substrate of the stereo lens is determined according to the following equation: Wherein, T1 represents the thickness of the curved substrate of the stereo lens, n1 represents the refractive index of the curved substrate, d1 represents the object distance of each of the plurality of lenses, T2 represents the distance between the light-emitting layer and the curved substrate, n2 represents the refractive index between the light-emitting layer and the curved substrate, T3 represents the thickness of each of the plurality of lenses, and n3 represents the refractive index of the plurality of lenses.

8. The display device according to claim 1, wherein, The thickness of each of the plurality of lenses is determined based on the surface radius of curvature and the lens spacing of each of the plurality of lenses.

9. The display device according to claim 8, wherein, The thickness of each of the plurality of lenses is determined according to the following equation: Wherein, T3 represents the thickness of each of the plurality of lenses, R1 represents the surface curvature radius of each of the plurality of lenses, and P represents the lens spacing.

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