Display device

Abstract

A display device is disclosed. The display device includes a display panel that displays a two-dimensional (2D) image and a three-dimensional (3D) image. The light transmission control unit passes 2D image display light displayed on the display panel in a first linearly polarized light direction, and converts a polarized light direction of 3D image display light displayed on the display panel into a second linearly polarized light direction and emits the 3D image display light in the second linearly polarized light direction. The optical device passes 2D image display light incident in a first linearly polarized light direction through the light transmission control unit while maintaining an optical path of the 2D image display light, and refracts and emits 3D image display light whose polarized light direction is converted to a second linearly polarized light direction by the light transmission control unit. Accordingly, the display quality of a stereoscopic image can be improved by preventing the occurrence of a crosstalk phenomenon in which images of different viewing viewpoints are viewed in a superimposed state during a stereoscopic image display period.

Description

Technical Field

[0001] The present disclosure relates to a display device, and more particularly, to a stereoscopic image display device. Background Art

[0002] A stereoscopic image display device is a device that allows a viewer to perceive a sense of depth by sending separate images to the left and right angles of the user. While this can be achieved with special 3D glasses, it can also be achieved without 3D glasses by using optics to direct eye-specific images to the correct eye by controlling the viewing angle of the light emitted from the display device.

[0003] When using 3D glasses, the display device can be configured to send the left eye image and the right eye image to the correct eye of the viewer by changing the polarization of the eye-specific image and then using glasses with different polarization filters on each eye to ensure that each eye sees only its intended image. Another method uses 3D glasses with a shutter synchronized with the display device to allow only the appropriate eye-specific image to enter the appropriate eye at the appropriate time. A stereoscopic image display device using non-glasses technology realizes a stereoscopic image by forming optical devices such as a parallax barrier and a lenticular lens sheet in the display device and separating the optical axis of the left parallax image and the optical axis of the right parallax image. However, a problem with a stereoscopic image display device using non-glasses technology is that parallax images adjacent to each other are viewed in a superimposed state. Utility Model Content

[0004] The purpose of the utility model is to provide a display device.

[0005] A display device may include: a light transmission control unit that allows 2D image display light displayed on a display panel to pass in a first linear polarized light direction, and converts the polarized light direction of 3D image display light displayed on the display panel into a second linear polarized light direction and emits the 3D image display light in the second linear polarized light direction; and an optical device that allows 2D image display light incident in the first linear polarized light direction through the light transmission control unit to pass while maintaining the optical path of the 2D image display light, and refracts and emits the 3D image display light, the polarized light direction of the 3D image display light being converted into the second linear polarized light direction by the light transmission control unit.

[0006] The display device may further include a display driver that changes a voltage difference between the first driving voltage and the second driving voltage and supplies the first driving voltage and the second driving voltage to the light transmission control unit during each 2D image display period or the 3D image display period, so that the light transmission control unit allows the 2D image display light to pass in a first linear polarized light direction, converts the polarized light direction of the 3D image display light into a second linear polarized light direction, and emits the 3D image display light in the second linear polarized light direction.

[0007] The light transmission control unit may include a plurality of light transmission partition films that partition light emission areas of the light transmission control unit according to arrangement positions of anisotropic lenses included in the optical device, and divide and emit 3D image display light for each emission area using the plurality of light transmission partition films.

[0008] The light transmission control unit may include: a first base substrate, which is arranged on the front surface of the display panel; a plurality of first polarization electrodes, which are arranged on the first base substrate according to the arrangement position of each anisotropic lens included in the optical device; a second base substrate, which faces the first base substrate and is parallel to the first base substrate; a plurality of second polarization electrodes, which are arranged in the rear surface direction of the second base substrate to face the plurality of first polarization electrodes and correspond to the plurality of first polarization electrodes in parallel with the plurality of first polarization electrodes; a plurality of polarization control layers, which are respectively placed between the plurality of first polarization electrodes and the plurality of second polarization electrodes; and a light transmission separation film, which is placed between the first base substrate and the second base substrate, so that the light emission area of ​​the light transmission control unit is separated according to the arrangement position of each anisotropic lens.

[0009] A plurality of first polarization electrodes may be disposed on a first base substrate in parallel with at least one anisotropic lens to correspond to an arrangement position of each anisotropic lens and a shape of a base side of each anisotropic lens, and wherein each of the plurality of first polarization electrodes may have an area and a width that are respectively smaller than an area and a width of a base side of each anisotropic lens.

[0010] A plurality of second polarization electrodes may be disposed on the rear surface of the second base substrate to face the plurality of first polarization electrodes, and each of the plurality of polarization control layers may be placed between the plurality of second polarization electrodes and the plurality of first polarization electrodes, and the plurality of second polarization electrodes may correspond to the plurality of first polarization electrodes in parallel with the plurality of first polarization electrodes, and wherein the plurality of second polarization electrodes may respectively have the same area, width and length as the plurality of first polarization electrodes facing the plurality of second polarization electrodes.

[0011] According to the voltage difference between the first polarization electrode and the second polarization electrode, the polarization control layer can make the 2D image display light incident in the first linear polarization light direction pass through in the first linear polarization light direction, and can convert the polarization light direction of the 3D image display light incident in the first linear polarization light direction into the second linear polarization light direction and can emit the 3D image display light in the second linear polarization light direction, wherein the display driver can be arranged on the display panel, in the 2D image display mode or the 3D image display mode, the display driver changes the voltage difference between the first driving voltage and the second driving voltage, and supplies the first driving voltage and the second driving voltage to the first polarization electrode and the second polarization electrode respectively, so that the multiple polarization control layers make the 2D image display light pass through in the first linear polarization light direction, and convert the polarization light direction of the 3D image display light into the second linear polarization light direction and emit the 3D image display light in the second linear polarization light direction.

[0012] In response to a first control signal and a second control signal of a display driver, a plurality of light-transmitting separation films can allow 2D image display light incident in a first linear polarized light direction to pass through during a 2D image display period, and can control the optical path of 3D image display light so that 3D image display light incident in a second linear polarized light direction is divided and emitted for each emission area during the 3D image display period.

[0013] A plurality of light-transmitting separation films may be respectively arranged in regions between first polarization electrodes adjacent to each other in a planar direction among a plurality of first polarization electrodes and in regions between second polarization electrodes adjacent to each other in a planar direction among a plurality of second polarization electrodes, arranged with the same length as an anisotropic lens included in the optical device, and overlapped with the base sides of two adjacent anisotropic lenses with a preset width.

[0014] A plurality of light-transmitting separation films may include: first light-transmitting electrodes, each arranged in a region between mutually adjacent first polarization electrodes among a plurality of first polarization electrodes; second light-transmitting electrodes, each arranged in a region between mutually adjacent second polarization electrodes among a plurality of second polarization electrodes; and a color-changing material layer, each placed between the first light-transmitting electrode and the second light-transmitting electrode.

[0015] According to a disclosed embodiment, a display device includes: a display panel that displays a two-dimensional (2D) image or a three-dimensional (3D) image; a light transmission control unit that allows 2D image display light displayed on the display panel to pass in a first linear polarized light direction, and converts the polarized light direction of 3D image display light displayed on the display panel into a second linear polarized light direction and emits the 3D image display light in the second linear polarized light direction; and an optical device that allows 2D image display light incident in the first linear polarized light direction through the light transmission control unit to pass while maintaining the optical path of the 2D image display light, and refracts and emits the 3D image display light, the polarized light direction of the 3D image display light being converted into the second linear polarized light direction by the light transmission control unit.

[0016] The display device may further include a display driver that changes a voltage difference between the first driving voltage and the second driving voltage, and supplies the first driving voltage and the second driving voltage to the light transmission control unit during each 2D image display period or the 3D image display period, so that the light transmission control unit allows the 2D image display light to pass in a first linear polarized light direction, and converts the polarized light direction of the 3D image display light into a second linear polarized light direction and emits the 3D image display light in the second linear polarized light direction.

[0017] The light transmission control unit may include a plurality of light transmission partition films which separate light emission areas of the light transmission control unit in a plan view according to the arrangement positions of the anisotropic lenses included in the optical device, and the plurality of light transmission partition films may be used to divide and emit 3D image display light for each emission area.

[0018] The light transmission control unit may include: a first base substrate, which is arranged on the front surface of the display panel; a plurality of first polarization electrodes, which are arranged on the first base substrate according to the arrangement position of each anisotropic lens included in the optical device; a second base substrate, which faces the first base substrate and is parallel to the first base substrate; a plurality of second polarization electrodes, which are arranged in the rear surface direction of the second base substrate to face the plurality of first polarization electrodes and correspond to the plurality of first polarization electrodes in parallel with the plurality of first polarization electrodes; a plurality of polarization control layers, which are respectively placed between the plurality of first polarization electrodes and the plurality of second polarization electrodes; and a plurality of light transmission separation films, which are placed between the first base substrate and the second base substrate, so that the light emission area of ​​the light transmission control unit is separated in a plan view according to the arrangement position of each anisotropic lens.

[0019] A plurality of first polarization electrodes may be disposed on a first base substrate in parallel with at least one anisotropic lens to correspond to an arrangement position of each anisotropic lens and a shape of a base side of each anisotropic lens, and each of the plurality of first polarization electrodes may have an area and a width that are smaller than an area and a width of the base side of each of the anisotropic lenses.

[0020] A plurality of second polarization electrodes may be disposed on the rear surface of the second base substrate to face the plurality of first polarization electrodes, and each of the polarization control layers may be placed between the plurality of second polarization electrodes and the plurality of first polarization electrodes, and the plurality of second polarization electrodes may correspond to the plurality of first polarization electrodes in parallel with the plurality of first polarization electrodes, and the plurality of second polarization electrodes may respectively have the same area, width, and length as the first polarization electrodes facing the plurality of second polarization electrodes.

[0021] According to the voltage difference between the first polarization electrode and the second polarization electrode, the multiple polarization control layers can allow the 2D image display light incident in the first linear polarization light direction to pass in the first linear polarization light direction, and can convert the polarization light direction of the 3D image display light incident in the first linear polarization light direction into the second linear polarization light direction and can emit the 3D image display light in the second linear polarization light direction.

[0022] The display driver may be disposed on the display panel. In a 2D image display mode or a 3D image display mode, the display driver may change a voltage difference between a first driving voltage and a second driving voltage, and supply the first driving voltage and the second driving voltage to the first polarization electrode and the second polarization electrode, respectively, so that the plurality of polarization control layers allow the 2D image display light to pass in a first linear polarization light direction, and convert the polarization light direction of the 3D image display light into a second linear polarization light direction and emit the 3D image display light in the second linear polarization light direction.

[0023] In response to a first control signal and a second control signal of a display driver, a plurality of light-transmitting separation films can allow 2D image display light incident in a first linear polarized light direction to pass through during a 2D image display period, and control the optical path of 3D image display light so that 3D image display light incident in a second linear polarized light direction is divided and emitted for each emission area during the 3D image display period.

[0024] A plurality of light-transmitting separation films may be respectively arranged in regions between first polarization electrodes adjacent to each other in a planar direction among a plurality of first polarization electrodes and in regions between second polarization electrodes adjacent to each other in a planar direction among a plurality of second polarization electrodes, may be arranged with the same length as an anisotropic lens included in the optical device, and may be overlapped with the base side of two anisotropic lenses adjacent to each other with a preset width.

[0025] A plurality of light-transmitting separation films may include: first light-transmitting electrodes, each arranged in a region between mutually adjacent first polarization electrodes among a plurality of first polarization electrodes; second light-transmitting electrodes, each arranged in a region between mutually adjacent second polarization electrodes among a plurality of second polarization electrodes; and a color-changing material layer, each placed between the first light-transmitting electrode and the second light-transmitting electrode.

[0026] The first light-transmitting electrode may be formed on the first base substrate to have the same length as the first polarization electrode along a length direction of the first polarization electrode, and the second light-transmitting electrode may be formed between the second polarization electrodes adjacent to each other to face the first light-transmitting electrode, and each of the color-changing material layers is disposed between the second light-transmitting electrode and the first light-transmitting electrode, and the second light-transmitting electrode may correspond to the first light-transmitting electrode in parallel with the first light-transmitting electrode and may have the same area, width, and length as the first light-transmitting electrode.

[0027] The color-changing material layer may remain transparent or change color to black according to a voltage difference between a first control voltage of the first light-transmitting electrode and a second control voltage of the second light-transmitting electrode.

[0028] The display driver may be disposed on the display panel, the display driver generating a first control voltage and a second control voltage having the same voltage magnitude during a 2D image display period, and supplying the first control voltage and the second control voltage to the first light-transmitting electrode and the second light-transmitting electrode, respectively, and generating a first control voltage and a second control voltage having a voltage difference greater than a preset voltage difference during a 3D image display period, and supplying the first control voltage and the second control voltage to the first light-transmitting electrode and the second light-transmitting electrode, respectively.

[0029] The optical device may include: a flat portion, which is set as a plane in the front surface direction of the light transmission control unit; and a stereoscopic lens layer, which can emit 2D image display light incident in a first linear polarized light direction in the front surface direction while maintaining the optical path of the 2D image display light, and can refract and change the optical path of 3D image display light incident in a second linear polarized light direction and can emit 3D image display light in the direction in which the optical path of the 3D image display light is refracted.

[0030] The stereoscopic lens layer may include: a plurality of first anisotropic lenses arranged side by side on a front surface of the flat portion; and a plurality of second anisotropic lenses covering the plurality of first anisotropic lenses and formed on a front surface of the plurality of first anisotropic lenses.

[0031] The plurality of first anisotropic lenses may be formed into a hemispherical shape in which liquid crystal is hardened in a state in which the long axis direction of the liquid crystal is oriented in the second linear polarized light direction, so that the plurality of first anisotropic lenses have a refractive index anisotropic property in which the refractive index of emitted light changes according to light having the first linear polarized light direction or the second linear polarized light direction incident from the rear surface direction.

[0032] The plurality of second anisotropic lenses may have the same refractive index as that in the short axis direction of the liquid crystal, and may correspond to the plurality of first anisotropic lenses in a one-to-one manner by respectively covering the plurality of first anisotropic lenses, or may be integrally formed to cover all of the plurality of first anisotropic lenses.

[0033] A display device, the display device comprising: a display panel, displaying a 2D image and a 3D image; a light transmission control unit, allowing 2D image display light displayed on the display panel to pass in a first linear polarized light direction, and converting the polarized light direction of 3D image display light displayed on the display panel into a second linear polarized light direction and emitting the 3D image display light in the second linear polarized light direction; an optical device, allowing the image display light emitted in the first linear polarized light direction through the light transmission control unit while maintaining the optical path of the image display light, and refracting the optical path of the image display light emitted in the second linear polarized light direction through the light transmission control unit and emitting the image display light whose optical path is refracted; and a display driver, controlling the emission operation of the light transmission control unit in the first linear polarized light direction or the second linear polarized light direction according to the 2D image display mode or the 3D image display mode.

[0034] According to the display device of the present disclosure, the display quality of a stereoscopic image can be improved by preventing the occurrence of a crosstalk phenomenon in which images of different viewing viewpoints are viewed in a superimposed state during a stereoscopic image display period. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other aspects and features of the present disclosure will become more apparent by describing embodiments of the present disclosure in detail with reference to the accompanying drawings, in which:

[0036] Figure 1 is an exploded perspective view showing a display device according to an embodiment;

[0037] Figure 2 yes Figure 1 A combined construction view of a display panel and an optical device as shown in FIG.

[0038] Figure 3 is a plan view partially showing an arrangement structure of sub-pixels in a display area;

[0039] Figure 4is a plan view partially showing an embodiment of an arrangement structure of sub-pixels of a display area;

[0040] Figure 5 is a view showing a method of setting viewing viewpoint information for each sub-pixel according to the width of a lens of an optical device;

[0041] Figure 6 is shown in detail along Figure 5 A cross-sectional view of the cutting surface taken along line II' in FIG.

[0042] Figure 7 It is shown in detail Figure 6 A cross-sectional view of a light-transmitting partition film;

[0043] Figure 8 is a plan view showing an arrangement structure of a first polarization electrode and a first light-transmitting electrode according to a width of a lens of an optical device;

[0044] Fig. 9 is a view showing image display timing in a two-dimensional (2D) mode and a three-dimensional (3D) mode;

[0045] Fig.10 is a cross-sectional view showing a light transmission control unit and a light emission path of an optical device in a 2D mode;

[0046] Fig.11 is a cross-sectional view showing a light transmission control unit and a light emission path of an optical device in a 3D mode;

[0047] Fig.12 is shown in more detail Fig.11 A cross-sectional view of a light transmission control unit and a light emission path of an optical device shown in ;

[0048] Fig.13 is an exploded perspective view showing a display device according to another embodiment of the present disclosure; and

[0049] Fig.14 It is shown Fig.13 A plan view of the construction of the display panel and optical device shown in FIG. DETAILED DESCRIPTION

[0050] The present disclosure will now be described more fully hereinafter with reference to the accompanying drawings, in which disclosed embodiments are shown. However, the present disclosure may be implemented in different forms and should not necessarily be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0051] It will also be understood that when a layer is referred to as being “on” another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. The same reference numerals may refer to the same components throughout the specification and drawings.

[0052] It will be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not necessarily be limited by these terms. These terms are used to distinguish one element from another element. For example, the first element discussed below may be referred to as the second element without departing from the teachings of the present disclosure. Similarly, the second element may also be referred to as the first element.

[0053] Each of the features of the various embodiments of the present disclosure can be combined in part or in whole or in combination with each other, and various interlocks and drives are technically possible. Each embodiment can be implemented independently of each other, or can be implemented together in association.

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

[0055] Figure 1 is an exploded perspective view showing a display device according to an embodiment. Figure 2 yes Figure 1 FIG. 1 is a diagram showing the combined construction of a display panel and an optical device as shown in FIG.

[0056] The display device 290 may be implemented as a flat panel display device such as a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), or an organic light emitting display (OLED).

[0057] The display device 290 may be a stereoscopic image display device (e.g., a three-dimensional (3D) image display device) including a display module 100 and an optical device 200. In order to display a 3D image, the stereoscopic image display device may separate and display a left-eye image and a right-eye image in a front surface direction so that a viewer can feel a three-dimensional effect through binocular parallax. In addition, the stereoscopic image display device may separate a plurality of viewing angle images and provide them to the front surface of the display device so that a different image is viewed for each of the different viewing angles.

[0058] According to an embodiment, the display device 290 may be a light field display device that allows the eyes of a viewer to view different image information by disposing the optical device 200 on the front surface of the display module 100. The light field display device may create a stereoscopic image by generating a light field by the display module 100 and the 3D optical device 200. As described later, light generated from each pixel of the display module 100 of the light field display device may form a light field guided toward a specific direction (e.g., a specific viewing angle and / or a specific viewpoint) through a stereoscopic lens, a pinhole, a barrier, etc., and thus, stereoscopic image information corresponding to a specific direction may be provided to the viewer.

[0059] The display module 100 may include a display panel 110 , a display driver 120 , and a circuit board.

[0060] The display panel 110 may include a display area DA and a non-display area NDA. The display area DA may include data lines, scan lines, voltage supply lines, and a plurality of pixels connected to the corresponding data lines and scan lines. For example, the scan lines may extend in a first direction (X-axis direction) and may be spaced apart from each other in a second direction (Y-axis direction). The data lines and the voltage supply lines may extend in the second direction (Y-axis direction) and may be spaced apart from each other in the first direction (X-axis direction).

[0061] Each of the pixels may be connected to at least one scan line, a data line, and a voltage supply line. Each of the pixels may include a thin film transistor, a light emitting element, and a capacitor, and the thin film transistor includes a driving transistor and at least one switching transistor. When a scan signal is applied from the scan line to each of the pixels, each of the pixels may receive a data voltage of the data line, and may emit light by supplying a driving current to the light emitting element according to the data voltage applied to the gate electrode of the driving transistor.

[0062] In the present disclosure, according to the order in which the display driver 120 supplies image data, the pixels of the display panel 110 display two-dimensional (2D) images in 2D mode, and display stereoscopic images (e.g., multi-view images) in 3D mode. The multi-view image includes n (where n is an integer of 2 or greater) view images. Here, the n view images are images of objects captured by n cameras spaced apart from each other at the binocular distance of ordinary people. The display panel 110 displays the multi-view image in units of n pixels in 3D mode. For example, the display panel 110 can display the multi-view image in units of two pixels in 3D mode. For example, two pixels of the display panel 110 can display a multi-view image including two view images.

[0063] The non-display area NDA may at least partially surround the display area DA at an edge of the display panel 110. The non-display area NDA may include a scan driver that applies a scan signal to a scan line and a pad (or "pad") connected to the display driver 120. For example, the display driver 120 may be disposed on one side of the non-display area NDA, and the pad may be disposed at an edge of one side of the non-display area NDA on which the display driver 120 is disposed.

[0064] The display driver 120 may output a control signal and an image data voltage for driving the display panel 110 in units of at least one frame or in units of at least one subframe. The display driver 120 may supply an image data voltage to a data line in units of at least one subframe. The display driver 120 may supply a source voltage to a voltage supply line and a scan control signal to a scan driver.

[0065] The display driver 120 sets a viewing viewpoint for each sub-pixel and a viewing viewpoint number according to the viewing viewpoint according to the relative arrangement position of the sub-pixel for each anisotropic lens included in the stereoscopic lens layer 220 of the optical device 200. In addition, the display driver 120 aligns the arrangement position for each horizontal line of the image data input from the outside according to the viewing viewpoint and the viewing viewpoint number of the sub-pixel. By generating an image data voltage so as to correspond to the image data whose arrangement position for each horizontal line is aligned and supplying the image data voltage to the data line, the display driver 120 can allow an image to be displayed according to the relative arrangement position of the sub-pixel relative to the stereoscopic lens layer 220.

[0066] The display driver 120 may be formed as an integrated circuit (IC) and may be disposed in a non-display area NDA of the display panel 110 in a chip on glass (COG) manner, a chip on plastic (COP) manner, or an ultrasonic bonding manner. As an example, the display driver 120 may be mounted on a circuit board and connected to a pad of the display panel 110.

[0067] The optical device 200 may be disposed on the front surface of the display panel 110 or the display module 100 in the third direction (Z-axis direction). The optical device 200 may be attached to one surface of the display panel 110 or the display area DA by an adhesive. Such an optical device 200 may be bonded to the front surface of the display module 100 by a separate panel bonding device. As an example, the optical device 200 may be implemented as a lenticular lens sheet including a stereoscopic lens layer 220. As an example, the stereoscopic lens layer 220 may include a plurality of first anisotropic lenses (or a first anisotropic lens sheet) forming an optical path according to the liquid crystal arrangement of the liquid crystal layer and a second anisotropic lens (or a second anisotropic lens sheet) forming an optical path of light emitted by the plurality of first anisotropic lenses. In this way, when the stereoscopic lens layer 220 is implemented as a lenticular lens sheet type by including a plurality of first anisotropic lenses, the stereoscopic lens layer 220 may be disposed on the flat portion 210.

[0068] The flat portion 210 may be directly disposed on the front surface of the display panel 110 or the display area DA in the Z-axis direction. For example, one surface of the flat portion 210 facing the display area DA and another surface of the flat portion 210 opposite to the one surface of the flat portion 210 may be parallel to each other. The flat portion 210 may output light incident from the display area DA as it is. The direction of light passing through one surface of the flat portion 210 may be consistent with the direction of light passing through the other surface of the flat portion 210. The flat portion 210 may be formed integrally with the stereoscopic lens layer 220, but is not necessarily limited thereto.

[0069] The stereoscopic lens layer 220 may be disposed on the flat portion 210 and may change the emission direction or traveling direction of the emitted light incident from the display area DA located on the rear surface thereof and emitted in the direction of the front surface thereof. For example, the image display light incident from the display area DA of the display module 100 may pass through the flat portion 210 and reach the rear surface of the stereoscopic lens layer 220.

[0070] The first anisotropic lens (or first anisotropic lens sheet) of the stereoscopic lens layer 220 may be tilted at a predetermined angle from one side of the display module 100 or the display area DA. As an example, the plurality of first anisotropic lenses may be formed as a tilted lens type or a semi-cylindrical lens type tilted at a predetermined angle based on one side of each of the sub-pixels of the display area DA. Here, the predetermined angle may be designed to prevent the color bands of the display device 290 from being recognized by the viewer. As another example, the plurality of first anisotropic lenses may be implemented as Fresnel lenses. The shape or type of the plurality of first anisotropic lenses is not necessarily limited thereto.

[0071] The stereoscopic lens layer 220 may be manufactured separately from the flat portion 210 and then attached to the flat portion 210. Alternatively, the stereoscopic lens layer 220 may be formed integrally with the flat portion 210. The first anisotropic lens (or first anisotropic lens sheet) of the stereoscopic lens layer 220 may be formed as an embossed pattern on the upper surface of the flat portion 210.

[0072] Figure 3 is a plan view partially showing the arrangement structure of sub-pixels in the display area.

[0073] Figure 3 The arrangement structure of sub-pixels arranged in a size of 24×6 is shown in FIG. Figure 3 , the arrangement form from the sub-pixel arranged at the arrangement position of (1,1) to the sub-pixel arranged at the arrangement position of (24,6) has been shown.

[0074] Reference Figure 3 , a plurality of unit pixels UP are arranged and formed in the display area DA of the display panel 110, and each of the unit pixels UP includes a plurality of sub-pixels SP1, SP2, and SP3. The respective sub-pixels SP1, SP2, and SP3 may be arranged along a plurality of rows and a plurality of columns. For example, the plurality of sub-pixels SP1, SP2, and SP3 may be arranged and formed in a vertical or horizontal stripe structure. In this case, as the resolution of the display device 290 increases, the display area DA may include more unit pixels UP.

[0075] For example, each of the unit pixels UP may include first to third sub-pixels SP1, SP2, and SP3 that display different colors. The first to third sub-pixels SP1, SP2, and SP3 may be arranged at positions where n data lines (where n is a positive integer) and m scan lines (where m is a positive integer) intersect each other. Each of the plurality of sub-pixels SP1, SP2, and SP3 may include a light-emitting element and a pixel circuit. The pixel circuit may include a driving transistor, at least one switching transistor, and at least one capacitor to drive the light-emitting element of each of the plurality of sub-pixels.

[0076] Each of the plurality of unit pixels UP may include a first sub-pixel SP1, a second sub-pixel SP2, and a third sub-pixel SP3. Optionally, each of the plurality of unit pixels UP may include a total of four sub-pixels, including a first sub-pixel SP1, two second sub-pixels SP2, and a third sub-pixel SP3. The number of sub-pixels included in each unit pixel UP is not necessarily limited thereto. The first sub-pixel SP1 may be a red sub-pixel, the second sub-pixel SP2 may be a green sub-pixel, and the third sub-pixel SP3 may be a blue sub-pixel. Each of the first to third sub-pixels SP1, SP2, and SP3 may receive a data signal including brightness information of red light, green light, or blue light from the display driver 120 and output light of a corresponding color.

[0077] Figure 4 is a plan view partially showing an embodiment of an arrangement structure of sub-pixels of a display area.

[0078] Reference Figure 4 , a plurality of unit pixels UP and a plurality of sub-pixels SP1, SP2 and SP3 may be The PENTILE is an arrangement of light emitting areas manufactured by Samsung. For example, each of the plurality of unit pixels UP may include The first to third sub-pixels SP1, SP2, and SP3 are arranged in a matrix form. A plurality of first to third sub-pixels SP1, SP2, and SP3 may be disposed at positions where n data lines (where n is a positive integer) and m scan lines (where m is a positive integer equal to or different from n) cross each other.

[0079] Each of the plurality of unit pixels UP may include a first sub-pixel SP1, two second sub-pixels SP2, and a third sub-pixel SP3, but is not necessarily limited thereto. Here, the first sub-pixel SP1 may be a red sub-pixel, the second sub-pixel SP2 may be a green sub-pixel, and the third sub-pixel SP3 may be a blue sub-pixel. The size of the opening area of ​​each of the first to third sub-pixels SP1, SP2, and SP3 may be determined according to the brightness of the corresponding light. Therefore, the size of the opening area of ​​each of the first to third sub-pixels SP1, SP2, and SP3 may be adjusted to achieve white light by mixing the light emitted from each of the plurality of light-emitting layers. Each of the first to third sub-pixels SP1, SP2, and SP3 may receive a data signal including brightness information of red light, green light, or blue light from the display driver 120 and output light of the corresponding color.

[0080] Figure 5 is a view showing a method of setting viewing viewpoint information for each sub-pixel according to the width of a lens of an optical device.

[0081] Reference Figure 5 , the viewing viewpoint information and the viewing viewpoint number can be set for each sub-pixel in sequence according to the relative arrangement positions of the sub-pixels SP1, SP2 and SP3 overlapped with the corresponding first anisotropic lenses LS1, LS2 and LS3 and information such as the width and tilt angle of each of the first anisotropic lenses LS1, LS2 and LS3.

[0082] As an example, the viewing viewpoint information and the viewing viewpoint number according to the relative arrangement positions of the sub-pixels SP1, SP2, and SP3 respectively overlapped with the first anisotropic lenses LS1, LS2, and LS3 are arranged in the width direction or the X-axis direction (see FIG. Figure 1 and Figure 2 ) is repeated. This can be expressed as formula 1.

[0083] [Formula 1]

[0084] Viewpoint information (or viewpoint number) offset = row × pixel size × tan (tilt angle)

[0085] Here, row is a horizontal line number, and pixel size is the width or size of each sub-pixel. In addition, tan (tilt angle) is a tangent value of a tilt angle, where the tilt angle represents a tilt angle relative to the vertical direction, but in this embodiment, the lenses are arranged side by side in the Y-axis direction (or vertical direction), so tan (tilt angle) becomes 0. In this case, the viewing viewpoint information (or viewing viewpoint number) offset is always 0.

[0086] All of the viewing viewpoint information (or viewing viewpoint numbers) of the subpixels arranged in the first horizontal line and the viewing viewpoint information of the subpixels arranged from the second horizontal line to the last horizontal line are identical to each other in the Y-axis direction (or vertical direction).

[0087] For example, the viewing viewpoint information of the corresponding sub-pixels SP1, SP2 and SP3 is set according to the relative arrangement positions of the sub-pixels SP1, SP2 and SP3 relative to the corresponding first anisotropic lenses LS1, LS2 and LS3, and the image display viewpoint or viewing viewpoint of the display device 290 is set according to the viewing viewpoint information and viewing viewpoint numbers of the corresponding sub-pixels SP1, SP2 and SP3.

[0088] like Figure 5As shown in , the image display viewpoint or viewing viewpoint of the display device 290 can be set to be the same as the number of sub-pixels and the viewpoint number corresponding to the width of each of the first anisotropic lenses LS1, LS2 and LS3 (or included in the width of each of the first anisotropic lenses LS1, LS2 and LS3) and arranged on the rear surface of each of the first anisotropic lenses LS1, LS2 and LS3. In particular, when the number of sub-pixels corresponding to the width of the rear surface (or substrate surface or substrate side) of each of the first anisotropic lenses LS1, LS2 and LS3 (or included in the width of the rear surface (or substrate surface or substrate side) of each of the first anisotropic lenses LS1, LS2 and LS3) and arranged on the rear surface of each of the first anisotropic lenses LS1, LS2 and LS3 is 9, the viewing viewpoint for detecting the optical characteristics of the display device 290 can be set to 9 viewing viewpoints.

[0089] Figure 6 is shown in detail along Figure 5 A cross-sectional view of the cutting surface taken along line II' in FIG.

[0090] Reference Figure 5 and Figure 6 The display device 290 includes a display panel 110 that displays a 2D image or a 3D image, a light transmission control unit 170 that changes the polarization direction of the 2D image or 3D image display light, and an optical device 200 that maintains or refracts the optical path of the image display light emitted through the light transmission control unit 170.

[0091] As described above, the first to third sub-pixels SP1, SP2, and SP3 of the display panel 110 display a 2D image in a 2D mode, and display a stereoscopic image (e.g., a multi-view image) in a 3D mode. For example, in a 3D mode, the first to third sub-pixels SP1, SP2, and SP3 may display a multi-view image in units of two adjacent sub-pixels. For example, the first to third sub-pixels SP1, SP2, and SP3 may display a multi-view image including two view images of two adjacent sub-pixels. The first to third sub-pixels SP1, SP2, and SP3 of the display panel 110 may emit 2D or 3D image display light to the front surface in a first linear polarized light direction according to the arrangement alignment of the polarizer on the front surface, etc.

[0092] The light transmission control unit 170 allows the 2D image display light displayed on the display panel 110 to pass as it is in the first linear polarization light direction, and converts the polarization light direction of the 3D image display light displayed on the display panel 110 into a second linear polarization light direction different from the first linear polarization light direction and emits the 3D image display light in the second linear polarization light direction. As an example, the first linear polarization light direction may refer to a direction in which the light vibrates in the Y-axis direction when traveling, and the second linear polarization light direction may refer to a direction in which the light vibrates in the X-axis direction when traveling.

[0093] The light transmission control unit 170 divides the emission area of ​​the 3D image display light emitted in the second linear polarized light direction, and allows the 3D image display light to be divided and emitted for each divided area. When the 3D image display light is divided and emitted for each divided area, the image display light can be emitted for each of the sub-pixels adjacent to each other and each of the divided areas adjacent to each other without overlapping each other. The structural features of the light transmission control unit 170 will be described in more detail below.

[0094] The light transmission control unit 170 includes a first base substrate 131 , a plurality of first polarization electrodes 132 , a second base substrate 141 , a plurality of second polarization electrodes 142 , a plurality of polarization control layers 135 , and a plurality of light transmission partition films 150 .

[0095] The first base substrate 131 is disposed on the front surface of the display panel 110 or the display area DA. The first base substrate 131 may include transparent glass, a transparent plastic film, or the like.

[0096] The plurality of first polarization electrodes 132 are disposed on the front surface of the first base substrate 131 according to the arrangement position of each first anisotropic lens LS included in the optical device 200. For example, the plurality of first polarization electrodes 132 may be disposed on the first base substrate 131 in parallel with the plurality of first anisotropic lenses LS, respectively, to correspond to the arrangement position of each of the plurality of first anisotropic lenses LS included in the optical device 200 and the shape of the base side of each of the plurality of first anisotropic lenses LS. For example, each of the plurality of first polarization electrodes 132 may have an area and a width smaller than an area and a width of the base side of each of the plurality of first anisotropic lenses LS.

[0097] The second base substrate 141 faces the first base substrate 131, a plurality of light-transmitting partition films 150 and a plurality of polarization control layers 135 are interposed between the second base substrate 141 and the first base substrate 131, and the second base substrate 141 is parallel to the first base substrate 131. Similar to the first base substrate 131, the second base substrate 141 may include transparent glass, a transparent plastic film, or the like.

[0098] The plurality of second polarization electrodes 142 are disposed on the rear surface of the second base substrate 141 to face the plurality of first polarization electrodes 132, and each of the polarization control layers 135 is interposed between the plurality of second polarization electrodes 142 and the plurality of first polarization electrodes 132, and the plurality of second polarization electrodes 142 correspond to the plurality of first polarization electrodes 132 in parallel with the plurality of first polarization electrodes 132. The plurality of second polarization electrodes 142 may have the same area, width, and length as the plurality of first polarization electrodes 132 facing the plurality of second polarization electrodes 142, respectively.

[0099] The plurality of polarization control layers 135 are respectively disposed between the plurality of first polarization electrodes 132 and the plurality of second polarization electrodes 142. According to the voltage difference between the first polarization electrodes 132 and the second polarization electrodes 142 facing each other, the plurality of polarization control layers 135 allow the 2D image display light to pass in the first linear polarization light direction, and convert the polarization light direction of the 3D image display light into the second linear polarization light direction and emit the 3D image display light in the second linear polarization light direction. To this end, the plurality of polarization control layers 135 may include a liquid crystal layer in which a plurality of liquid crystals LC are arranged. The arrangement of the liquid crystals LC in the liquid crystal layer changes according to the voltage difference between the first driving voltage of the first polarization electrode 132 and the second driving voltage of the second polarization electrode 142.

[0100] The light transmission control unit 170 transmits the image display light incident from the display panel 110 while maintaining the polarization direction of the image display light or changes the polarization direction of the image display light and transmits the image display light in the changed polarization direction by controlling the arrangement of the liquid crystals LC during the 2D image display period and the arrangement of the liquid crystals LC during the 3D image display period to be different from each other. For example, the light transmission control unit 170 passes the 2D image display light incident in the first linear polarization direction while maintaining the polarization direction of the 2D image display light as the first linear polarization direction, and changes the polarization direction of the 3D image display light incident in the first linear polarization direction to the second linear polarization direction and transmits the 3D image display light in the second linear polarization direction.

[0101] The plurality of light-transmitting partition films 150 are interposed between the first base substrate 131 and the second base substrate 141 so that the light emission region of the light-transmitting control unit 170 is divided in a plan view according to the arrangement position of each first anisotropic lens LS included in the optical device 200. For example, in a plan view, the plurality of light-transmitting partition films 150 divide the light emission region of the light-transmitting control unit 170 according to the contact position and the arrangement position of both side surfaces of the first anisotropic lenses LS aligned in the optical device 200.

[0102] The plurality of light-transmitting partition films 150 allow the 2D image display light emitted in the first linear polarized light direction to pass as it is, and allow the 3D image display light emitted in the second linear polarized light direction to be divided and emitted for each emission area. Therefore, the plurality of light-transmitting partition films 150 can allow the 3D image display lights of adjacent sub-pixels or adjacent emission areas to be emitted without overlapping each other.

[0103] A plurality of light-transmitting partition films 150 may be respectively disposed in regions between the first polarization electrodes 132 adjacent to each other in the planar direction and in regions between the second polarization electrodes 142 adjacent to each other in the planar direction. The plurality of light-transmitting partition films 150 are disposed along the length direction of the first anisotropic lenses LS adjacent to each other in the planar direction with the same length as the length of the first anisotropic lenses LS, and overlap the base sides of the two first anisotropic lenses LS adjacent to each other with a predetermined width. This will be referred to later. Figure 7 etc. provide a detailed description of the plurality of light-transmitting partition films 150 .

[0104] The optical device 200 emits the image display light emitted by the light transmission control unit 170 while maintaining the optical path of the image display light, or changes the optical path of the image display light and emits the image display light through the changed optical path. To this end, the optical device 200 includes a flat portion 210 and a stereoscopic lens layer 220.

[0105] The flat portion 210 of the optical device 200 is provided as a plane in the front surface direction of the light transmission control unit 170. The flat portion 210 may include transparent glass, a transparent plastic film, etc., and may be arranged and adhered in the front surface direction of the light transmission control unit 170.

[0106] The stereoscopic lens layer 220 may be disposed and adhered in the front surface direction of the flat portion 210. The stereoscopic lens layer 220 emits 2D image display light incident in a first linear polarized light direction in the front surface direction while maintaining the light path of the 2D image display light, and refracts and changes the light path of 3D image display light incident in a second linear polarized light direction and emits the 3D image display light in a direction in which the light path of the 3D image display light is refracted.

[0107] The stereoscopic lens layer 220 includes a plurality of first anisotropic lenses LS arranged side by side on the front surface of the flat portion 210 and a plurality of second anisotropic lenses CLS covering the plurality of first anisotropic lenses LS and formed on the front surface of the plurality of first anisotropic lenses LS.

[0108] Each of the plurality of first anisotropic lenses LS can be formed into a hemispherical shape by aligning the long axis direction of the liquid crystal in the second linear polarization direction and then hardening the liquid crystal. Therefore, the plurality of first anisotropic lenses LS have a refractive index anisotropy characteristic in which the refractive index of emitted light changes according to light having the first linear polarization direction or the second linear polarization direction incident from the rear surface direction.

[0109] The plurality of second anisotropic lenses CLS may have the same refractive index as the refractive index in the short axis direction of the liquid crystal. The plurality of second anisotropic lenses CLS may be formed in a one-to-one manner to correspond to the plurality of first anisotropic lenses LS by respectively covering the plurality of first anisotropic lenses LS, or may be integrally formed to cover all the plurality of first anisotropic lenses LS.

[0110] When the image display light is incident on the plurality of first anisotropic lenses LS in the first linear polarization direction, the image display light incident on the plurality of first anisotropic lenses LS in the first linear polarization direction passes through the plurality of first anisotropic lenses LS as is in the first linear polarization direction according to the refractive index in the short axis direction of the liquid crystal included in the plurality of first anisotropic lenses LS. In this case, since the plurality of second anisotropic lenses CLS also have a refractive index in the short axis direction of the liquid crystal, the image display light having the first linear polarization direction is not refracted at the interface between the plurality of first anisotropic lenses LS and the plurality of second anisotropic lenses CLS and passes in the front surface direction.

[0111] However, when the image display light whose polarization direction is changed to have the second linear polarization direction is incident on the plurality of first anisotropic lenses LS, the polarization direction of the image display light incident on the plurality of first anisotropic lenses LS with the second linear polarization direction may be changed according to the refractive index in the long axis direction of the liquid crystal included in the plurality of first anisotropic lenses. Therefore, the image display light is refracted at the interface between the plurality of first anisotropic lenses LS having the refractive index in the long axis direction of the liquid crystal and the plurality of second anisotropic lenses CLS having the refractive index in the short axis direction of the liquid crystal. In this way, the plurality of first anisotropic lenses LS are implemented to function as refractive lenses only when the image display light having the second linear polarization direction is incident thereon.

[0112] Figure 7 It is shown in detail Figure 6 A cross-sectional view of a light-transmitting separation film.

[0113] Reference Figure 6 and Figure 7The plurality of light-transmitting separation films 150 include a first light-transmitting electrode 151, a second light-transmitting electrode 155 and a color-changing material layer 153. The first light-transmitting electrodes 151 are all arranged in a region between the first polarizing electrodes 132 adjacent to each other, the second light-transmitting electrodes 155 are all arranged in a region between the second polarizing electrodes 142 adjacent to each other, and the color-changing material layer 153 is placed between the first light-transmitting electrode 151 and the second light-transmitting electrode 155.

[0114] The first light-transmitting electrode 151 is formed in a region between the first polarization electrodes 132 adjacent to each other in a plane direction with the same length as that of the first polarization electrodes 132 along a length direction of the first polarization electrodes 132 adjacent to each other, and is formed on the first base substrate 131. Therefore, the first light-transmitting electrode 151 may overlap the base sides of the two first anisotropic lenses LS disposed adjacent to each other and in contact with each other by a predetermined width.

[0115] The second light-transmitting electrode 155 is formed between the second polarizing electrodes 142 adjacent to each other to face the first light-transmitting electrode 151, and each of the color-changing material layers 153 is interposed between the second light-transmitting electrode 155 and the first light-transmitting electrode 151, and the second light-transmitting electrode 155 corresponds to the first light-transmitting electrode 151 in parallel with the first light-transmitting electrode 151. The second light-transmitting electrode 155 may be formed on the rear surface of the second base substrate 141, and may have the same area, width, and length as the first light-transmitting electrode 151, respectively, and the first light-transmitting electrode 151 faces the second light-transmitting electrode 155 in parallel with the second light-transmitting electrode 155.

[0116] The color-changing material layer 153 changes color between the first light-transmitting electrode 151 and the second light-transmitting electrode 155 according to a voltage difference between a first control voltage of the first light-transmitting electrode 151 and a second control voltage of the second light-transmitting electrode 155 .

[0117] The color-changing material layer 153 includes an electrochromic material, such as tungsten that is oxidized or reduced according to an electrochemical reaction. As an example, an electrochromic material such as tungsten oxide can absorb ambient light, and change color to a predetermined color (such as black) when a reduction reaction occurs, and change color to transparent when an oxidation reaction occurs. As another example, an electrochromic material such as viologen (1,1'-dibenzyl-4,4'-bipyridylium bis tetrafluoroborate) can also absorb ambient light, and change color to a predetermined color (such as black) when a reduction reaction occurs, and change color to transparent when an oxidation reaction occurs. In this way, the color-changing material layer 153 can also include a mixed material with other electrochromic materials that display various colors through a reduction reaction in addition to the electrochromic material (such as tungsten oxide or viologen) to increase the light shielding function of the color-changing material layer 153.

[0118] Reference Figure 7 , when the voltage difference between the first control voltage of the first light-transmitting electrode 151 and the second control voltage of the second light-transmitting electrode 155 is 0V, the electrochromic material included in the color-changing material layer 153 may be oxidized to maintain transparency. When the voltage difference between the first control voltage of the first light-transmitting electrode 151 and the second control voltage of the second light-transmitting electrode 155 is 3V to 5V or more, the electrochromic material included in the color-changing material layer 153 may be reduced to change color to a predetermined color (such as black).

[0119] Figure 8 is a plan view showing an arrangement structure of a first polarization electrode and a first light-transmitting electrode according to a width of a lens of an optical device.

[0120] Reference Figure 8 , the plurality of first polarization electrodes 132 may have an area and a width smaller than that of the base side of each of the first anisotropic lenses LS1, LS2, and LS3 to correspond to the arrangement positions of the first anisotropic lenses LS1, LS2, and LS3 included in the optical device 200. In addition, the first light-transmitting electrode 151 of the light-transmitting partition film 150 is disposed in a region between the first polarization electrodes 132 adjacent to each other in a plane direction with the same length as the first polarization electrode 132 along the length direction of the first anisotropic lenses LS1, LS2, and LS3. Therefore, the first light-transmitting electrode 151 may overlap the base sides of the first anisotropic lenses LS1, LS2, and LS3 adjacent to each other and in contact with each other with a predetermined width.

[0121] Fig. 9 is a view showing image display timing in 2D mode and 3D mode. In addition, Table 1 is a table showing changes in magnitudes of voltages applied to the first and second polarization electrodes and the first and second light transmission electrodes, respectively, in 2D mode and 3D mode.

[0122] Reference Fig. 9 In the 2D mode, the display driver 120 may divide each first frame period 1Frame into a first subframe period SF1 and a second subframe period SF2, and supply a 2D image data voltage RGB2D for displaying a 2D image to the data line of the display panel 110 during the first subframe period SF1 and the second subframe period SF2. Therefore, the display panel 110 may be driven at a frequency twice the input frame frequency. The frame frequency is 60 Hz in the National Television Standards Committee (NTSC) system and 50 Hz in the Phase Alternation Line (PAL) system. For example, the frame frequency of the display panel 110 may be 120 Hz, which is twice the frame frequency of the input image in the NTSC system.

[0123] Table 1

[0124]

[0125]

[0126] Referring to Table 1, during the 2D mode driving period, the display driver 120 may supply a first driving voltage to the plurality of first polarization electrodes 132, and supply a second driving voltage with the same voltage magnitude as the first driving voltage to the second polarization electrode 142. In this case, the display driver 120 may generate the first driving voltage and the second driving voltage so that the difference between the first driving voltage of the first polarization electrode 132 and the second driving voltage of the second polarization electrode 142 is maintained at a preset reference voltage magnitude (e.g., 5V) or less, and supply the first driving voltage and the second driving voltage to the first polarization electrode 132 and the second polarization electrode 142, respectively.

[0127] Similarly, during the 2D mode driving period, the display driver 120 may supply a first control voltage to the first light-transmitting electrode 151 of the light-transmitting partition film 150, and supply a second control voltage with the same voltage magnitude as the first control voltage to the second light-transmitting electrode 155 of the light-transmitting partition film 150. In this case, the display driver 120 may generate the first control voltage and the second control voltage so that the difference between the first control voltage of the first light-transmitting electrode 151 and the second control voltage of the second light-transmitting electrode 155 is maintained at a preset reference voltage magnitude (e.g., 1V) or less, and supply the first control voltage and the second control voltage to the first light-transmitting electrode 151 and the second light-transmitting electrode 155, respectively.

[0128] Reference Fig. 9 In a 3D mode for displaying a stereoscopic image such as a multi-view image, the display driver 120 may divide each first frame period 1Frame into a first sub-frame period SF1 and a second sub-frame period SF2, and supply 3D image data voltages MLD and MRD for displaying a 3D image to the data lines of the display panel 110 during the first sub-frame period SF1 and the second sub-frame period SF2.

[0129] Referring to Table 1, during the 3D mode driving period, the display driver 120 may supply a first driving voltage to the plurality of first polarization electrodes 132, and supply a second driving voltage as a voltage having a magnitude greater than that of the first driving voltage by a preset voltage difference or more to the second polarization electrode 142. For example, the display driver 120 may generate the first driving voltage and the second driving voltage so that the difference between the first driving voltage of the first polarization electrode 132 and the second driving voltage of the second polarization electrode 142 is maintained at a preset voltage difference (e.g., 25V) or more, and supply the first driving voltage and the second driving voltage to the first polarization electrode 132 and the second polarization electrode 142, respectively.

[0130] Similarly, in the 3D mode, the display driver 120 may supply a first control voltage to the first light-transmitting electrode 151 of the light-transmitting partition film 150, and supply a second control voltage with a voltage magnitude greater than the first control voltage to the second light-transmitting electrode 155 of the light-transmitting partition film 150. In this case, the display driver 120 may generate the first control voltage and the second control voltage so that the difference between the first control voltage of the first light-transmitting electrode 151 and the second control voltage of the second light-transmitting electrode 155 is maintained at a preset reference voltage difference (e.g., 5V) or more, and supply the first control voltage and the second control voltage to the first light-transmitting electrode 151 and the second light-transmitting electrode 155, respectively.

[0131] Fig.10 is a cross-sectional view showing a light transmission control unit and a light emission path of an optical device in a 2D mode.

[0132] Reference Fig.10 In the 2D mode, the display driver 120 supplies a 2D image data voltage RGB2D for displaying a 2D image to the data lines of the display panel 110 during each first frame period 1Frame or during each of the first subframe period SF1 and the second subframe period SF2.

[0133] All of the first to third sub-pixels SP1, SP2, and SP3 disposed in the display area DA of the display panel 110 may be aligned according to the arrangement of the polarizers on the front surface, etc., to transmit light having the first linear polarization direction to the display area DA. The 2D image of "(X)" shows that light is emitted to the front surface.

[0134] The display driver 120 generates a first driving voltage and a second driving voltage such that a difference between the first driving voltage and the second driving voltage is maintained at or below a preset reference voltage, and supplies the first driving voltage and the second driving voltage to the first polarization electrode 132 and the second polarization electrode 142 of the light transmission control unit 170, respectively. Since the voltage difference between the first polarization electrode 132 and the second polarization electrode 142 is maintained at or below a preset reference voltage difference, the plurality of polarization control layers 135 each disposed between the corresponding first polarization electrode 132 and the second polarization electrode 142 can maintain the refractive index in the short-axis direction of the liquid crystal.

[0135] When the 2D image display light is emitted from the display area DA of the display panel 110 in the first linear polarization direction When “(X)” is incident, the first linear polarized light direction “(X)” The incident 2D image display light is polarized in the first linear polarization direction according to the refractive index in the short axis direction of the liquid crystal included in the polarization control layer 135. “(X)” is passed as is.

[0136] In addition, since the image display light is in the first linear polarization direction “(X)” is incident on the first anisotropic lens LS of the optical device 200, and thus is polarized in the first linear polarization direction. The incident 2D image display light "(X)" passes as is in the first linear polarization direction according to the refractive index in the short axis direction of the liquid crystal included in the first anisotropic lens LS. In this case, since the plurality of second anisotropic lenses CLS also have a refractive index in the short axis direction of the liquid crystal, the first linear polarization direction The 2D image of “(X)” shows that light is not refracted at the interface between the plurality of first anisotropic lenses LS and the plurality of second anisotropic lenses CLS and passes in the front surface direction.

[0137] The display driver 120 generates a first control voltage and a second control voltage so that a difference between the first control voltage and the second control voltage is maintained at a preset reference voltage level (e.g., 1V) or less, and during a 2D mode driving period, supplies the first control voltage and the second control voltage to first light-transmitting electrodes 151 and second light-transmitting electrodes 155 included in a plurality of light-transmitting partition films 150, respectively.

[0138] Since the voltage difference between the first control voltage of the first light-transmitting electrode 151 and the second control voltage of the second light-transmitting electrode 155 is a preset reference voltage or less, the electrochromic material included in the color-changing material layer 153 is oxidized to maintain transparency. Therefore, the plurality of light-transmitting partition films 150 allow the 2D image display light incident from the display area DA to pass to the front surface.

[0139] Fig.11 is a cross-sectional view showing the light transmission control unit and the light emission path of the optical device in the 3D mode. Fig.12 is shown in more detail Fig.11 A cross-sectional view of the light transmission control unit and the light emission path of the optical device shown in FIG.

[0140] Reference Fig.11 and Fig.12 In the 3D mode, the display driver 120 supplies 3D image data voltages MLD and MRD for displaying a 3D image to the data lines of the display panel 110 during each first frame period 1Frame or each of the first subframe period SF1 and the second subframe period SF2.

[0141] All of the first to third sub-pixels SP1, SP2, and SP3 disposed in the display area DA of the display panel 110 may be aligned according to the arrangement of the polarizers on the front surface, etc., to transmit light having the first linear polarization direction to the display area DA. The 3D image of "(X)" shows that light is emitted to the front surface.

[0142] The display driver 120 generates a first driving voltage and a second driving voltage such that a difference between the first driving voltage and the second driving voltage is maintained at a voltage magnitude greater than a preset reference voltage magnitude, and supplies the first driving voltage and the second driving voltage to the first polarization electrode 132 and the second polarization electrode 142 of the light transmission control unit 170, respectively. Since the voltage difference between the first polarization electrode 132 and the second polarization electrode 142 is maintained at the preset reference voltage difference or greater, the plurality of polarization control layers 135 each disposed between the corresponding first polarization electrode 132 and the second polarization electrode 142 can be converted to have a refractive index in the long axis direction of the liquid crystal.

[0143] When the 3D image display light is emitted from the display area DA of the display panel 110 in the first linear polarization direction When “(X)” is incident, the first linear polarized light direction The polarization direction of the incident 3D image display light “(X)” is changed to the second linear polarization direction according to the refractive index in the long axis direction of the liquid crystal included in the polarization control layer 135 "←→", and the 3D image displays light in the second linear polarized light direction Launch on “←→”.

[0144] In this case, since the image display light is in the second linear polarization direction “←→” is incident on the first anisotropic lens LS of the optical device 200, so the second linear polarized light direction is “←→” The incident 3D image display light is reflected in the second linear polarization direction according to the refractive index in the long axis direction of the liquid crystal included in the first anisotropic lens LS. In this case, since the plurality of second anisotropic lenses CLS also have a refractive index in the short axis direction of the liquid crystal, they have a second linear polarization direction The 3D image of "←→" shows that light is refracted at the interface between the plurality of first anisotropic lenses LS and the plurality of second anisotropic lenses CLS. The 3D image shows that light is emitted in the direction in which it is refracted.

[0145] The display driver 120 generates a first control voltage and a second control voltage such that a difference between the first control voltage and the second control voltage changes to a preset reference voltage magnitude (e.g., 5 V) or more, and during a 3D mode driving period, supplies the first control voltage and the second control voltage to first light-transmitting electrodes 151 and second light-transmitting electrodes 155 included in a plurality of light-transmitting partition films 150, respectively.

[0146] Since the voltage difference between the first control voltage of the first light-transmitting electrode 151 and the second control voltage of the second light-transmitting electrode 155 becomes greater than the preset reference voltage, the electrochromic material included in the color-changing material layer 153 is reduced to change color to black. Therefore, the plurality of light-transmitting partition films 150 block the 3D image display light incident from the display area DA at the rear surface. In addition, the plurality of light-transmitting partition films 150 allow the 3D image display light incident from the display area DA to be displayed in the second linearly polarized light direction. The 3D image display light traveling on “←→” is divided and emitted for each emission area. Therefore, the plurality of light-transmitting partition films 150 may allow the 3D image display lights of adjacent sub-pixels or adjacent emission areas to be emitted without overlapping each other.

[0147] Fig.13 is an exploded perspective view showing a display device according to another embodiment of the present disclosure. Fig.14 It is shown Fig.13 A plan view of the construction of the display panel and optical device shown in FIG.

[0148] Reference Fig.13 and Fig.14 The display device 290 according to the embodiment may be implemented as a flat panel display device such as an organic light emitting display (OLED), and may be a stereoscopic image display device including the display module 100 and the optical device 200 .

[0149] The display module 100 may include a display panel 110 , a display driver 120 , and a circuit board 130 .

[0150] The display panel 110 may include a display area DA and a non-display area NDA. The display area DA may include data lines, scan lines, voltage supply lines, and a plurality of pixels connected to the corresponding data lines and scan lines.

[0151] The optical device 200 may be disposed on the display module 100. The optical device 200 may be attached to one surface of the display module 100 by an adhesive. The optical device 200 may be bonded to the display module 100 by a panel bonding device. For example, the optical device 200 may be implemented as a lenticular lens sheet including first anisotropic lenses LS1, LS2, and LS3.

[0152] In concluding the detailed description, those skilled in the art will appreciate that many variations and modifications can be made to the preferred embodiments without substantially departing from the principles of the present disclosure.

Claims

1. A display device, characterized in that: The display device comprises: a light transmission control unit that allows 2D image display light displayed on the display panel to pass in a first linear polarized light direction, converts the polarized light direction of 3D image display light displayed on the display panel into a second linear polarized light direction and emits the 3D image display light in the second linear polarized light direction; and an optical device that allows the 2D image display light incident in the first linear polarized light direction through the light transmission control unit to pass therethrough while maintaining the optical path of the 2D image display light, and refracts and emits the 3D image display light, the polarized light direction of the 3D image display light being converted into the second linear polarized light direction by the light transmission control unit.

2. The display device according to claim 1, characterized in that The display device also includes a display driver that changes a voltage difference between a first driving voltage and a second driving voltage and supplies the first driving voltage and the second driving voltage to the light transmission control unit during each 2D image display period or a 3D image display period, so that the light transmission control unit allows the 2D image display light to pass in the first linear polarized light direction, converts the polarized light direction of the 3D image display light into the second linear polarized light direction, and emits the 3D image display light in the second linear polarized light direction.

3. The display device according to claim 1, characterized in that The light transmission control unit includes a plurality of light transmission partition films that partition light emission areas of the light transmission control unit according to arrangement positions of anisotropic lenses included in the optical device, and divides and emits the 3D image display light for each emission area using the plurality of light transmission partition films.

4. The display device according to claim 1, characterized in that The light transmission control unit comprises: A first base substrate is disposed on the front surface of the display panel; a plurality of first polarization electrodes disposed on the first base substrate according to an arrangement position of each anisotropic lens included in the optical device; a second base substrate facing the first base substrate and parallel to the first base substrate; a plurality of second polarization electrodes disposed in a rear surface direction of the second base substrate to face the plurality of first polarization electrodes and corresponding to the plurality of first polarization electrodes in parallel with the plurality of first polarization electrodes; a plurality of polarization control layers, respectively disposed between the plurality of first polarization electrodes and the plurality of second polarization electrodes; and A plurality of light-transmitting partition films are interposed between the first base substrate and the second base substrate so that a light-emitting area of ​​the light-transmitting control unit is partitioned according to the arrangement position of each anisotropic lens.

5. The display device according to claim 4, characterized in that: The plurality of first polarization electrodes are disposed on the first base substrate in parallel with at least one anisotropic lens to correspond to the arrangement position of each anisotropic lens and the shape of the base side of each anisotropic lens, and Each of the plurality of first polarization electrodes has an area and a width that are respectively smaller than an area and a width of the substrate side of each anisotropic lens.

6. The display device according to claim 5, characterized in that: The plurality of second polarization electrodes are disposed on a rear surface of the second base substrate to face the plurality of first polarization electrodes, and each of the plurality of polarization control layers is disposed between the plurality of second polarization electrodes and the plurality of first polarization electrodes, and the plurality of second polarization electrodes correspond to the plurality of first polarization electrodes in parallel with the plurality of first polarization electrodes, and The plurality of second polarization electrodes respectively have the same area, width and length as the plurality of first polarization electrodes facing the plurality of second polarization electrodes.

7. The display device according to claim 5, characterized in that: According to a voltage difference between the first polarization electrode and the second polarization electrode, the plurality of polarization control layers allow the 2D image display light incident in the first linear polarization light direction to pass in the first linear polarization light direction, and convert the polarization light direction of the 3D image display light incident in the first linear polarization light direction into the second linear polarization light direction and emit the 3D image display light in the second linear polarization light direction, Wherein, a display driver is arranged on the display panel, and in a 2D image display mode or a 3D image display mode, the display driver changes a voltage difference between a first driving voltage and a second driving voltage, and supplies the first driving voltage and the second driving voltage to the first polarization electrode and the second polarization electrode respectively, so that the multiple polarization control layers allow the 2D image display light to pass in the first linear polarization light direction, and convert the polarization light direction of the 3D image display light into the second linear polarization light direction and emit the 3D image display light in the second linear polarization light direction.

8. The display device according to claim 4, characterized in that: In response to a first control signal and a second control signal of a display driver, the plurality of light-transmitting partition films allow the 2D image display light incident in the first linear polarized light direction to pass through during a 2D image display period, and control an optical path of the 3D image display light so that the 3D image display light incident in the second linear polarized light direction is divided and emitted for each emission area during the 3D image display period.

9. The display device according to claim 8, characterized in that: The plurality of light-transmitting separation films are respectively arranged in regions between first polarization electrodes adjacent to each other in a plane direction among the plurality of first polarization electrodes and in regions between second polarization electrodes adjacent to each other in the plane direction among the plurality of second polarization electrodes, are arranged with the same length as the anisotropic lens included in the optical device, and are overlapped with the base sides of two adjacent anisotropic lenses with a preset width.

10. The display device according to claim 8, characterized in that The plurality of light-transmitting partition films include: The first light-transmitting electrodes are each disposed in a region between the first polarizing electrodes adjacent to each other among the plurality of first polarizing electrodes; second light-transmitting electrodes, each disposed in a region between second polarization electrodes adjacent to each other among the plurality of second polarization electrodes; and The color-changing material layer is disposed between the first light-transmitting electrode and the second light-transmitting electrode.

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