Indication device

Abstract

To provide a display device that can provide different images depending on the viewing angle. [Solution] A display device according to one embodiment of this specification includes a display area including a first display area and a second display area arranged along a first direction; a plurality of first light sources arranged within the display area; a diffusion sheet arranged on the plurality of first light sources; a light emission control film arranged on the diffusion sheet; a base substrate arranged on the light emission control film; a light guide plate arranged on the base substrate and including a first light guide pattern and a second light guide pattern; and a plurality of second light sources arranged facing the side surface of the light guide plate, wherein the first light guide pattern and the second light guide pattern have different shapes from each other, the first light guide pattern is arranged in the first display area, and the second light guide pattern is arranged in the second display area.

Description

Technical Field

[0001] The present specification relates to a display device.

Background Art

[0002] With the development of the information society, various demands for display devices that display images are increasing, and various types of display devices such as liquid crystal display apparatuses and organic light emitting diode display apparatuses have been put into use.

[0003] A general display device does not restrict the viewing angle. However, for reasons such as privacy and information protection, there has recently been a demand for restricting the viewing angle of display devices. For example, in the case of a display device used as an information medium inside a vehicle, it is necessary to provide high-quality images to a passenger riding in the passenger seat, while restricting the viewing angle for the driver for safety reasons.

Summary of the Invention

Problem to be Solved by the Invention

[0004] The problem to be solved by the present specification is to provide a display device capable of providing different images depending on viewing angles.

[0005] Another problem to be solved by the present specification is to provide a display device in which light guide patterns having different characteristics depending on viewing angles can be arranged.

[0006] Another problem to be solved by the present specification is to provide a display device capable of improving the quality of an image emitted at a narrow viewing angle and a wide viewing angle by arranging light guide patterns having different characteristics depending on viewing angles.

[0007] The problems described herein are not limited to those described above, and other technical problems can be inferred from the following embodiments. [Means for solving the problem]

[0008] A display device according to one embodiment of this specification includes a display area including a first display area and a second display area arranged along a first direction; a plurality of first light sources arranged within the display area; a diffusion sheet arranged on the plurality of first light sources; a light emission control film arranged on the diffusion sheet; a base substrate arranged on the light emission control film; a light guide plate arranged on the base substrate and including a first light guide pattern and a second light guide pattern; and a plurality of second light sources arranged facing the side surface of the light guide plate, wherein the first light guide pattern and the second light guide pattern have different shapes from each other, the first light guide pattern is arranged in the first display area, and the second light guide pattern is arranged in the second display area.

[0009] A display device according to another embodiment of this specification includes a display area including a first display area and a second display area; a plurality of first light sources disposed within the display area; a diffusion sheet disposed on the plurality of first light sources; a light emission control film disposed on the diffusion sheet; a light guide plate disposed on the light emission control film and including a base substrate and a first light guide pattern and a second light guide pattern disposed on the base substrate; and a plurality of second light sources disposed opposite the side surface of the light guide plate, wherein the first light guide pattern is disposed in the first display area and the second light guide pattern is disposed in the second display area, and the second light guide pattern covers a portion of the second display area of ​​the base substrate and exposes the remaining portion.

[0010] Specific details of other embodiments are included in the detailed description and drawings. [Effects of the Invention]

[0011] According to embodiments of this specification, a display device can be provided that can provide images that differ from each other depending on the viewing angle.

[0012] According to embodiments of this specification, a display device can be provided in which light guide patterns having different characteristics depending on the viewing angle are arranged.

[0013] According to embodiments of this specification, a display device can be provided that can improve the quality of the screen emitted at narrow and wide viewing angles by arranging light guide patterns having different characteristics depending on the viewing angle.

[0014] According to embodiments of this specification, the power consumption of a display device can be reduced by improving the quality of the screen emitted at both narrow and wide viewing angles.

[0015] The effects described herein are not limited to those described above, and other effects not mentioned herein will be clearly understood by those with ordinary skill in the art to which this specification pertains from the following description. [Brief explanation of the drawing]

[0016] [Figure 1] This is a plan view of a display device according to one embodiment. [Figure 2] This is an exploded perspective view of a display device according to one embodiment. [Figure 3] This is a cross-sectional view taken along line A-A' in Figure 1. [Figure 4] This is a schematic diagram of a display device in which both the first and second display areas operate in share mode. [Figure 5] This is a schematic diagram of a display device where the first display area operates in shared mode and the second display area operates in private mode. [Figure 6] This is a perspective view of the second light guide plate and its surroundings according to one embodiment. [Figure 7] This is an enlarged view of a portion of the second display area in Figure 6. [Figure 8] This is an enlarged view of a portion of the second display area in Figure 6. [Figure 9] This is a cross-sectional view taken along line B-B' in Figure 6. [Figure 10] It is a diagram schematically illustrating a fourth light guiding pattern according to one embodiment. [Figure 11] It is a graph showing a density along a second direction of the fourth light guiding pattern according to one embodiment. [Figure 12] It is a plan view of a display device according to another embodiment. [Figure 13] It is a perspective view of a second light guide plate and the periphery thereof according to another embodiment. [Figure 14] It is a plan view of a display device according to another embodiment. [Figure 15] It is a perspective view of a second light guide plate and the periphery thereof according to another embodiment. DETAILED DESCRIPTION OF EMBODIMENTS

[0017] Hereinafter, embodiments will be described with reference to the drawings. In this specification, when a certain component (or a region, layer, portion, or the like) is referred to as being "on", "connected to", or "coupled to" another component, this means that it may be directly connected / coupled on the other component, or a third component may be disposed therebetween.

[0018] Identical reference numerals refer to identical components. In addition, in the drawings, the thicknesses, ratios, and dimensions of components are exaggerated for effective description of the technical content. "And / or" includes all combinations of one or more of the associated listed items that can be defined.

[0019] Terms such as first, second, and the like may be used to describe various components, but the components are not limited by these terms. These terms are only used to distinguish one component from another. For example, a first component may be named as a second component without departing from the scope of the rights of the present embodiment, and similarly, a second component may also be named as a first component. Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0020] Terms such as "down," "on the lower side," "up," and "on the upper side" are used to describe the relationships between components shown in the drawing. These terms are relative concepts and are described based on the direction shown in the drawing.

[0021] Terms such as "includes" or "has" are intended to indicate the presence of features, figures, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood not to preemptively exclude the possibility of the presence or addition of one or more other features, figures, steps, actions, components, parts, or combinations thereof.

[0022] Figure 1 is a plan view of a display device according to one embodiment.

[0023] Referring to Figure 1, the display device 1 may be a device that includes both a display function for displaying images and a touch sensing function for sensing user touches, but the present invention is not limited thereto. For example, the display device 1 may include only one of either a display function for displaying images or a touch sensing function for sensing user touches.

[0024] The display device 1 may be an electroluminescent display device or a micro light-emitting diode display device that includes a touch sensor. Alternatively, the display device 1 may be an electroluminescent display device that includes a touch sensor, an organic light-emitting diode (OLED) display device, a quantum-dot light-emitting diode display device, or an inorganic light-emitting diode display device.

[0025] The display device 1 according to this embodiment may be a vehicle display device, but the present invention is not limited thereto. For example, the description of the display device 1 can be applied to any device that includes a display function, without being limited to the type of device.

[0026] The display device 1 may have a length extending along a first direction DR1 and a width along a second direction DR2. The first direction DR1 and the second direction DR2 may be intersecting directions or perpendicular to each other, but the present invention is not limited thereto. The display device 1 may have a long side extending along the first direction DR1 and a short side extending along the second direction DR2.

[0027] If the display device 1 according to this embodiment is a vehicle display device, the display device 1 may include functions for operating at least some of the various functions of the vehicle, and functions for displaying various information related to the vehicle.

[0028] If the display device 1 according to this embodiment is a vehicle display device, the display device 1 may be placed on the dashboard of the vehicle. The display device 1 may be placed across the driver's seat and the passenger seat located in the front seats of the vehicle, but the present invention is not limited thereto.

[0029] The orientation in which the display device 1 is positioned across the driver's seat and the passenger seat may correspond to the first direction DR1. In other words, the display device 1 may extend along the first direction DR1 and be positioned across the driver's seat and the passenger seat along the first direction DR1.

[0030] If the display device 1 is a vehicle display device, both the driver in the driver's seat and the co-driver in the passenger seat can use the display device 1. The display device 1 may provide the same image to both the driver in the driver's seat and the co-driver in the passenger seat, or it may provide different images to each of them.

[0031] The display device 1 may include a display area DA and a non-display area NDA.

[0032] The display area DA may be an area on which a screen can be displayed. Light may be emitted to the outside from the display area DA. The display area DA may further include a function to sense user touch. In this case, the display area DA may correspond to a touch sensing area, but the present invention is not limited thereto.

[0033] The planar shape of the display area DA may correspond to the planar shape of the display device 1, but the present invention is not limited thereto. The display area DA may have a long side extending in a first direction DR1 and a short side extending in a second direction DR2.

[0034] The display area DA may include a first display area DA1 and a second display area DA2. The first display area DA1 and the second display area DA2 may be arranged consecutively along the first direction DR1. That is, the second display area DA2 may be located on one side of the first direction DR1 of the first display area DA1, and the first display area DA1 may be located on the other side of the first direction DR1 of the second display area DA2.

[0035] The first display area DA1 may operate in the first mode, and the second display area DA2 may operate in both the first and second modes.

[0036] For example, the first mode may be a Share mode, which does not restrict the lateral viewing angle of the display device 1. The second mode may be a Privacy mode, which restricts the lateral viewing angle of the display device 1. That is, the Share mode may be a mode with a wide viewing angle, and the Privacy mode may be a mode with a narrow viewing angle.

[0037] Here, the lateral field of view may refer to the lateral field of view in the first direction DR1.

[0038] In the first display area DA1, the share mode may be maintained while the display device 1 is operating. In the second display area DA2, the operating mode may be selectively changed between the share mode and the privacy mode while the display device 1 is operating. While the display device 1 is operating, in the second display area DA2, the operating mode may be switched from the share mode to the privacy mode, or from the privacy mode to the share mode.

[0039] When the display device 1 is applied to a vehicle display device, the first display area DA1 may be positioned closer to the driver's seat, and the second display area DA2 may be positioned closer to the passenger seat.

[0040] When the first display area DA1 and the second display area DA2 are operating in share mode, the images and videos displayed in the first display area DA1 and the images and videos displayed in the second display area DA2 may be provided to both the driver sitting in the driver's seat and the passenger sitting in the front passenger seat.

[0041] When the second display area DA2 operates in privacy mode, images and videos displayed in the second display area DA2 are provided to the passenger sitting in the front passenger seat, but not to the driver sitting in the driver's seat.

[0042] A virtual line, the display boundary BD, may be located between the first display area DA1 and the second display area DA2. The display boundary BD may refer to the boundary between the first display area DA1 and the second display area DA2. The second display area DA2 may be located on one side of the first direction DR1 of the display boundary BD, and the first display area DA1 may be located on the other side of the first direction DR1 of the display boundary BD.

[0043] The non-display area (NDA) may be an area where no display is shown on the screen. Light does not need to be emitted from the non-display area (NDA), but the present invention is not limited thereto. The non-display area (NDA) may be located around the display area (DA). The non-display area (NDA) may surround the display area (DA), but the embodiments of this specification are not limited thereto. The non-display area (NDA) may define the bezel area of ​​the display device 1, but the embodiments of this specification are not limited thereto.

[0044] Figure 2 is an exploded perspective view of a display device according to one embodiment. Figure 3 is a cross-sectional view taken along line A-A' in Figure 1.

[0045] Referring to Figures 1 to 3, a display device 1 according to one embodiment may include a display panel 110 that includes pixels and displays an image, and a first backlight unit 120 and a second backlight unit 130 that are arranged on the back of the display panel 110 and emit light to the front of the display panel 110. Although not shown in the drawings, the display device 1 may further include a panel guide, a top case, a bottom cover, etc., that house and fix the display panel 110 and the first backlight unit 120 and the second backlight unit 130.

[0046] The display panel 110 is a liquid crystal panel and may include a lower substrate and an upper substrate joined to each other, and a liquid crystal layer interposed between these substrates.

[0047] The lower substrate may include gate lines and data lines arranged to intersect each other, and liquid crystal cells formed in the intersection regions of the gate lines and data lines. The liquid crystal cells may include thin-film transistors positioned in the intersection regions of the gate lines and data lines, and pixel electrodes that receive data voltages applied to the data lines via the thin-film transistors when the thin-film transistors are turned on.

[0048] The upper substrate may have a color filter for realizing multiple colors including red, green, and blue, a black matrix for partitioning the space between the color filters and blocking light from passing through the liquid crystal layer, and a common electrode for applying voltage to the liquid crystal layer.

[0049] The liquid crystal cell is driven by an electric field generated by the potential difference between the data voltage supplied to the pixel electrodes via the data line and the common voltage supplied to the common electrode, thereby adjusting the amount of light transmitted through the display panel 110.

[0050] The first backlight unit 120 and the second backlight unit 130 are located below the display panel 110 and provide light to the display panel 110. The first backlight unit 120 may be located below the display panel 110, while the second backlight unit 130 may be located between the first backlight unit 120 and the display panel 110.

[0051] The first backlight unit 120 may include a first light source package 121, a first light guide plate 122, a diffusion sheet 123, a prism sheet 124, and a light emission control film 125.

[0052] The planar shapes of the first light guide plate 122, the diffusion sheet 123, the prism sheet 124, and the light emission control film 125 can correspond to the planar shape of the display device 1. That is, the first light guide plate 122, the diffusion sheet 123, the prism sheet 124, and the light emission control film 125 may have a long side extending in a first direction DR1 and a short side extending in a second direction DR2.

[0053] The first light source package 121 may include a first light source LS1 and a first light source substrate BS1. Multiple first light source LS1s are provided, and multiple first light source LS1s may be mounted on the first light source substrate BS1. On the first light source substrate BS1, multiple first light source LS1s may be repeatedly arranged along a first direction DR1 and a second direction DR2. At least some of the multiple first light source LS1s may be arranged within the display area DA.

[0054] Multiple first light sources LS1 are driven by power applied via the first light source substrate BS1 to generate light. The first light sources LS1 can generate light using various light sources, including, but are not limited to, cold cathode fluorescent lamps (CCFLs), external electrode fluorescent lamps (EEFLs), hot cathode fluorescent lamps (HCFLs), and light-emitting diodes (LEDs).

[0055] The first light source substrate BS1 can provide a space on which the first light source LS1 is arranged. The first light source substrate BS1 may have a circuit board mounted on it for the operation of the first light source LS1. The first light source substrate BS1 controls the first light source LS1 in response to electrical signals supplied via the wiring of the circuit board, thereby enabling the first light source LS1 to emit light.

[0056] The first light source package 121 may be positioned below the first light guide plate 122. This allows light emitted from the first light source package 121 to enter the lower surface of the first light guide plate 122. However, the positioning of the first light source package 121 is not limited to this. For example, the first light source package 121 may be positioned on one side of the first light guide plate 122. In other words, the first light source package 121 may be positioned facing one side of the first light guide plate 122. This allows light emitted from the first light source package 121 to enter the side of the first light guide plate 122, and the light to diverge to the upper surface of the first light guide plate 122.

[0057] The display device 1 may further include a light source protection layer PT. The light source protection layer PT may be placed on the first light source package 121 and positioned to cover the first light source LS1. The light source protection layer PT can protect the first light source LS1. The light source protection layer PT may be made of resin, but the present invention is not limited thereto.

[0058] The first light guide plate 122 may be placed on the first light source package 121. The first light guide plate 122 is positioned opposite the first light source package 121 and guides the light incident from the first light source package 121 to exit to its upper surface.

[0059] In one embodiment, the first light guide plate 122 is a light-transmitting material and may be manufactured from a material selected from, for example, a plastic material such as polymethyl methacrylate (PMMA) or a polycarbonate (PC) system. However, the material of the first light guide plate 122 is not limited to those described above, and the first light guide plate 122 may be manufactured from other materials.

[0060] The diffusion sheet 123 may be placed on the first light guide plate 122. The diffusion sheet 123 improves brightness uniformity with respect to viewing angle by diffusing the light emitted from the first light guide plate 122. The diffusion sheet 123 may be formed from PET or PC (Poly Carbonate) resin and may include a particle coating layer that plays a role in diffusion.

[0061] The prism sheet 124 may be placed on the diffusion sheet 123. The prism sheet 124 concentrates the light emitted from the first light guide plate 122 or the diffusion sheet 123 so that the direction of propagation of the light approaches the normal direction of the display panel 110, thereby improving the front brightness of the display panel 110.

[0062] The prism sheet 124 may include a first prism sheet 124a and a second prism sheet 124b. Each of the first prism sheet 124a and the second prism sheet 124b may include a prism pattern. The prism patterns of the first prism sheet 124a and the prism pattern of the second prism sheet 124b may be arranged so that their axes are perpendicular to each other.

[0063] The brightness of the display device 1 can be improved by arranging the second light source package 131 on one and the other side of the second direction DR2 of the second light guide plate 132, and by including the first prism sheet 124a and the second prism sheet 124b in the prism sheet 124.

[0064] The Light Control Film (LCF) 125 may be placed on the prism sheet 124. The Light Control Film 125 can control the light emission profile of the first backlight unit 120. For example, the Light Control Film 125 can be used to adjust the viewing angles of the light emitted from the first backlight unit 120 to be narrow in the left-right (first direction DR1) and / or up-down (second direction DR2) directions.

[0065] The light-emitting control film 125 may include a plurality of light-shielding patterns BP and a pattern insulating film IL that fills the spaces between the light-shielding patterns BP. Although not shown, the light-emitting control film 125 may further include a lower substrate and an upper substrate that are positioned between the light-shielding patterns BP and the pattern insulating film IL.

[0066] The light-shielding pattern BP may contain a black dye such as carbon black. The light-shielding pattern BP may have a constant thickness in the thickness direction (third direction DR3) and extend parallel to the second direction DR2. Multiple light-shielding patterns BP may be provided and arranged repeatedly along the first direction DR1.

[0067] The spacing between adjacent light-shielding patterns BP may be constant across the entire display area DA, but is not limited to this. Multiple light-shielding patterns BP may all have the same thickness, but is not limited to this.

[0068] For example, the spacing between adjacent light-shielding patterns BP and the thickness of multiple light-shielding patterns BP may all be the same across the first display area DA1 and the second display area DA2, but the present invention is not limited thereto.

[0069] Therefore, if the spacing between adjacent light-shielding patterns BP is constant across the entire area, and the thickness of all multiple light-shielding patterns BP is the same, the light emission control film 125 can more smoothly restrict the emission angle of light emitted from the first light source package 121 and restrict the direction of travel to a narrower angle. Furthermore, in this case, a more uniform amount of light is provided across the entire display area DA, and the clarity can be improved across the entire display area DA.

[0070] The light-shielding pattern BP may restrict the path of light passing through the light-emitting control film 125. The light-emitting control film 125 adjusts the transmittance of light emitted from the first light source package 121, thereby increasing the contrast and sharpness of images and videos displayed in the display area DA.

[0071] Furthermore, the light emission control film 125 can limit the emission angle of light emitted from the first light source package 121 by using the light shielding pattern BP.

[0072] The light-shielding pattern BP may restrict the path of light passing through the light-emitting control film 125. By using the light-shielding pattern BP, the light-emitting control film 125 can suppress or prevent light emitted from the first light source package 121 from traveling to one side and the other side of the first direction DR1.

[0073] Of the light emitted from the first light source package 121, the light that travels in the third direction DR3 while traveling to one or the other side of the first direction DR1 can be blocked by the light emission control film 125. Therefore, the direction of propagation of the light emitted from the first light source package 121 that has passed through the light emission control film 125 has a narrow angle.

[0074] As a result, in the first display area DA1, most of the light emitted from the first light source package 121 may be directed towards the driver and not perceived by the passengers. In the second display area DA2, most of the light emitted from the first light source package 121 may be directed towards the passengers and not perceived by the driver.

[0075] The second backlight unit 130 may be placed on the first backlight unit 120. The second backlight unit 130 may include a second light source package 131 and a second light guide plate 132.

[0076] The second light guide plate 132 may be placed on the light emission control film 125. The second light guide plate 132 guides the light emitted from the second backlight unit 130 and emits it to its upper surface. The light emitted from the second backlight unit 130 may also be incident on the side surface of the second light guide plate 132.

[0077] The planar shape of the second light guide plate 132 may correspond to the planar shape of the display device 1. That is, the second light guide plate 132 may have a longer side extending in the first direction DR1 and a shorter side extending in the second direction DR2.

[0078] The second light guide plate 132 may be made of substantially the same material as the first light guide plate 122, but the present invention is not limited thereto.

[0079] The second light source package 131 may be positioned on the side of the second light guide plate 132. The second light source package 131 may be positioned facing (opposing) the long side of the second light guide plate 132. The second light source package 131 may extend along the first direction DR1.

[0080] The second light source package 131 may be arranged on both one and the other side of the second direction DR2 of the second light guide plate 132, but the present invention is not limited thereto. That is, the second light guide plate 132 may be arranged between the second light source packages 131. The second light source packages 131 may be arranged opposite each other with the second light guide plate 132 in between.

[0081] The second light source package 131 may include a second light source LS2 and a second light source substrate BS2. The second light source substrate BS2 may extend along a first direction DR1. Multiple second light source LS2s are provided, and multiple second light source LS2s may be mounted on the second light source substrate BS2. Multiple second light source LS2s may be arranged on the second light source substrate BS2 and repeatedly arranged along the first direction DR1.

[0082] In Figure 2, for the sake of explanation, only four second light sources LS2 arranged on the second light source substrate BS2 are shown, but the present invention is not limited to this. More than four second light sources LS2 may be provided.

[0083] By repeatedly arranging multiple second light sources LS2 along the first direction DR1, the field of view of the first direction DR1 in share mode can be improved.

[0084] Multiple second light sources LS2 are powered and driven via the second light source substrate BS2 to generate light. While not limited to these, the second light sources LS2 can generate light using various light sources such as cold cathode fluorescent lamps (CCFLs), external electrode fluorescent lamps (EEFLs), hot cathode fluorescent lamps (HCFLs), and light-emitting diodes (LEDs).

[0085] The second light source substrate BS2 can provide space for the second light source LS2 to be positioned. The second light source substrate BS2 may have a circuit board mounted on it for the operation of the second light source LS2. The second light source substrate BS2 controls the second light source LS2 in response to electrical signals supplied via the wiring of the circuit board, thereby enabling the second light source LS2 to emit light.

[0086] The second light guide plate 132 can refract the light emitted from the second light source package 131 and incident on it not only in the second direction DR2 but also in the first direction DR1. As a result, the light emitted from the second light source package 131 and passing through the second light guide plate 132 can realize at least a portion of the display device 1 in share mode.

[0087] Figure 4 is a schematic diagram of a display device in which both the first and second display areas operate in share mode. Figure 5 is a schematic diagram of a display device in which the first display area operates in share mode and the second display area operates in privacy mode.

[0088] The light emitted from the first light source package 121 and passing through the light emission control film 125 has a narrow viewing angle. Therefore, when there is no light emitted from the second light source package 131, both the first display area DA1 and the second display area DA2 operate in privacy mode.

[0089] At least some and the rest of the multiple second light sources LS2 may be turned on and turned off independently. This allows at least some of the multiple second light sources LS2 to be turned on, and a portion of the display area DA corresponding to the area where the turned-on second light sources LS2 are located to be switched to share mode.

[0090] As shown in Figure 4, when the second light source LS2, which is positioned in the regions corresponding to the first display region DA1 and the second display region DA2, is turned on and emits light, both the first display region DA1 and the second display region DA2 may emit light L1, which has a narrow viewing angle and is emitted from the first light source package 121 and has passed through the light emission control film 125, and light L2, which has a wide viewing angle and is emitted from the second light source package 131 and has passed through the second light guide plate 132 and has passed through the first direction DR1.

[0091] Therefore, both the first display area DA1 and the second display area DA2 can be operated in shared mode.

[0092] As shown in Figure 5, a portion of the second light source LS2 located in the area corresponding to the first display area DA1 turns on and emits light, while the remaining portion of the second light source LS2 located in the area corresponding to the second display area DA2 does not need to turn off and emit light.

[0093] In this case, both light L1 with a narrow viewing angle, emitted from the first light source package 121 and passing through the light emission control film 125, and light L2 with a wide viewing angle in the first direction DR1, emitted from the second light source package 131 and passing through the second light guide plate 132, can be emitted from the first display area DA1. From the second display area DA2, only light L1 with a narrow viewing angle, which has passed through the light emission control film 125, can be emitted by passing through the second light guide plate 132.

[0094] Therefore, the first display area DA1 can operate in shared mode, and the second display area DA2 can operate in private mode.

[0095] When the first display area DA1 operates only in share mode, the first light source LS1 and the second light source LS2, which are located in the area corresponding to the first display area DA1, can maintain their turned-on state.

[0096] Here, the first light source LS1 located in the area corresponding to the first display area DA1 may refer to the first light source LS1 located in the third direction DR3 of the first display area DA1. The second light source LS2 located in the area corresponding to the first display area DA1 may refer to the second light source LS2 located on one side and the other side of the second direction DR2 of the first display area DA1.

[0097] If the second display area DA2 operates in a switchable manner between share mode and privacy mode, the first light source LS1 located in the area corresponding to the second display area DA2 will maintain a turned-on state, and the second light source LS2 located in the area corresponding to the second display area DA2 may switch between a turned-on state and a turned-off state. By switching the operation of the second light source LS2 located in the area corresponding to the second display area DA2 between a turned-on state and a turned-off state, the operating mode of the second display area DA2 may be switched between share mode and privacy mode.

[0098] Here, the first light source LS1 located in the area corresponding to the second display area DA2 may refer to the first light source LS1 located in the third direction DR3 of the second display area DA2. The second light source LS2 located in the area corresponding to the second display area DA2 may refer to the second light source LS2 located on one side and the other side of the second direction DR2 of the second display area DA2.

[0099] By including both a first display area DA1 and a second display area DA2, the display device 1 can provide the driver and passenger with different images depending on their viewing angle.

[0100] In the first display area DA1 and the second display area DA2, different light guide patterns GP1 to 4 (see Figure 6) may be arranged on the second light guide plate LGP. This allows for improved wide-viewing-angle characteristics in the first direction DR1 in the first display area DA1, which operates only in share mode, and improves both wide-viewing-angle and narrow-viewing-angle characteristics in the second display area DA2, which can switch between share mode and privacy mode. This improves the quality of the screen emitted at both wide and narrow viewing angles.

[0101] Figure 6 is a perspective view of the second light guide plate and its surroundings according to one embodiment. Figures 7 and 8 are enlarged views of a portion of the second display area in Figure 6.

[0102] Figure 7 shows a simplified diagram of the light propagation direction when the second display area DA2 is driven in privacy mode. Figure 8 shows a simplified diagram of the light propagation direction when the second display area DA2 is driven in share mode.

[0103] Referring to Figures 1 to 3 and Figures 6 to 8, in the second light guide plate 132, the first display area DA1 and the second display area DA2 may be arranged with light guide patterns GP1 and GP2 having different shapes from each other.

[0104] Specifically, the second light guide plate 132 may include a base substrate SB, a first light guide pattern GP1, a second light guide pattern GP2, a third light guide pattern GP3, and a fourth light guide pattern GP4 arranged on the base substrate SB.

[0105] The first light guide pattern GP1 and the second light guide pattern GP2 may be arranged on the upper surface of the base substrate SB. The upper surface of the base substrate SB may refer to the surface facing the display panel 110. The upper surface of the base substrate SB may refer to the surface from which light is emitted.

[0106] The first light guide pattern GP1 and the second light guide pattern GP2 may have different shapes and be arranged in different regions. The first light guide pattern GP1 may be placed in the first display region DA1, and the second light guide pattern GP2 may be placed in the second display region DA2.

[0107] The first light guide pattern GP1 may protrude from the base substrate SB toward the display panel 110. Multiple first light guide patterns GP1 may be provided. Each of the multiple first light guide patterns GP1 may extend in the second direction DR2. In the first display area DA1, the multiple first light guide patterns GP1 may be repeatedly arranged along the first direction DR1.

[0108] The cross-section of the first light guide pattern GP1 cut along the second direction DR2 may be convex toward the display panel 110. The cross-section of the first light guide pattern GP1 cut along the first direction DR1 may be round. The cross-section of the first light guide pattern GP1 cut along the first direction DR1 may be any shape selected from the shapes of a part of a circle, a part of an ellipse, etc.

[0109] The cross-section of the first light guide pattern GP1 cut in the first direction DR1 may be constant along the second direction DR2. The first light guide pattern GP1 extends along the second direction DR2, and the size of the cross-section of the first light guide pattern GP1 may be constant along the second direction DR2.

[0110] The first light guide pattern GP1 extends along the second direction DR2, and the thickness (width) of the first light guide pattern GP1 may be constant along the second direction DR2. Here, the thickness of the first light guide pattern GP1 may refer to the thickness in the third direction DR3. That is, the first light guide pattern GP1 may be arranged over the entire area of ​​the first display area DA1. The entire area of ​​the first display area DA1 of the base substrate SB may be covered by the first light guide pattern GP1.

[0111] The first light guide pattern GP1 can uniformly diffuse light incident from the first light source LS1 and the second light source LS2 in the first direction DR1 through scattering, refraction, diffraction, and surface total internal reflection.

[0112] Since the first light guide pattern GP1 is arranged across the entire area of ​​the first display area DA1 and formed in a constant cross-sectional shape along the second direction DR2, light passing through the first light guide pattern GP1 can be smoothly diffused by the first direction DR1. Therefore, when the first display area DA1 is driven in share mode, a wider viewing angle can be secured, and the screen emitted at a wide viewing angle can have a more uniform brightness.

[0113] The second light guide pattern GP2 may protrude from the base substrate SB toward the display panel 110. Multiple second light guide patterns GP2 may be provided.

[0114] The second light guide pattern GP2 may be positioned near (or around) at least one end of the base substrate SB on either side of the second direction DR2. For example, if the second light source LS2 is positioned on both sides of the second direction DR2 of the second light guide plate 132, the second light guide pattern GP2 may be positioned near both ends of the base substrate SB on either side of the second direction DR2.

[0115] In the second display area DA2, the second light guide pattern GP2 may be repeatedly arranged in the first direction DR1 near the ends of the base substrate SB in the second direction DR2 on both sides.

[0116] The length of the second direction DR2 of the second light guide pattern GP2 may be shorter than the length of the second direction DR2 of the first light guide pattern GP1. The length of the second direction DR2 of the second light guide pattern GP2 may also be shorter than the length of the second direction DR2 of the base substrate SB.

[0117] As a result, the base substrate SB between the second light guide pattern GP2 located near one end of the second direction DR2 of the base substrate SB and the second light guide pattern GP2 located near the other end of the second direction DR2 of the base substrate SB may be exposed without being covered by the second light guide pattern GP2.

[0118] The cross-section of the second light guide pattern GP2 cut along the second direction DR2 may be convex toward the display panel 110. The cross-section of the second light guide pattern GP2 cut along the first direction DR1 may be round. The cross-section of the second light guide pattern GP2 cut along the first direction DR1 may be any shape selected from the shapes of a part of a circle, a part of an ellipse, etc.

[0119] The width of the cross-section of the second light guide pattern GP2 may decrease as it approaches the second direction DR2 from the edge of the base substrate SB. Specifically, the cross-section obtained by cutting the second light guide pattern GP2 along the first direction DR1 may change as it approaches the second direction DR2.

[0120] For example, the cross-section obtained by cutting the second light guide pattern GP2, located at one end of the second direction DR2 of the base substrate SB, in the first direction DR1, may have a smaller cross-sectional size (width) as it approaches the other side of the second direction DR2. The cross-section obtained by cutting the second light guide pattern GP2, located at the other end of the second direction DR2 of the base substrate SB, in the first direction DR1, may have a smaller cross-sectional size (width) as it approaches the one side of the second direction DR2.

[0121] As a result, the base substrate SB may be exposed between adjacent second light guide patterns GP2 along the first direction DR1, without being covered by the second light guide patterns GP2.

[0122] As the second light guide pattern GP2 approaches the center of the base substrate SB, its width decreases, and by exposing at least a portion of the base substrate SB of the second display area DA2, the diffusion of light in the first direction DR1 by the second light guide pattern GP2 can be minimized. Light traveling at a narrow viewing angle passing through the base substrate SB that is exposed and not covered by the second light guide pattern GP2 can smoothly maintain a narrow viewing angle.

[0123] As shown in Figure 7, when the second display area DA2 operates in privacy mode, no light may be emitted from the second light source LS2, and light may be emitted from the first light source LS1. Most of the light L3 emitted from the first light source LS1 can pass through the base substrate SB in the area exposed and not covered by the second light guide pattern GP2. This allows the light L3 emitted from the first light source LS1 to maintain a narrow viewing angle more smoothly in privacy mode.

[0124] In other words, when the second display area DA2 of the display device 1 is driven in privacy mode, the area exposed and not covered by the second light guide pattern GP2 can more smoothly maintain a narrow viewing angle of emitted light, thereby improving the quality of images and videos provided at a narrow viewing angle.

[0125] The second light guide pattern GP2 can diffuse the light emitted from the second light source LS2 and incident on the second light guide plate 132 in the first direction DR1 through scattering, refraction, diffraction, and total internal reflection of the surface.

[0126] By having a cross-section of the second light guide pattern GP2 that is part of a circle or part of an ellipse, light can be diffused in the first direction DR1 via the second light guide pattern GP2.

[0127] As shown in Figure 8, when the second display area DA2 operates in share mode, light may be emitted from the first light source LS1 and the second light source LS2. A portion of the light L4 emitted from the second light source LS2 can pass through the third light guide pattern GP3, be refracted and reflected by the fourth light guide pattern GP4, and travel toward the second light guide pattern GP2.

[0128] When a portion of the light L4 emitted from the second light source LS2 passes through the second light guide pattern GP2, that portion of the light L4 can be refracted and diffused by the second light guide pattern GP2 to one side and the other side of the first direction DR1. As a result, in share mode, the light L4 emitted from the second light source LS2 can provide a wider viewing angle more smoothly.

[0129] In addition, although not shown in Figure 8, the second light guide pattern GP2 can direct a portion of the light emitted from the first light source LS1 into the second light guide pattern GP2. In this case, the second light guide pattern GP2 can refract and diffuse the light emitted from the first light source LS1 to one side and the other side of the first direction DR1.

[0130] In other words, when the second display area DA2 of the display device 1 is driven in share mode, the light emitted from the first light source LS1 and the second light source LS2 can be provided more smoothly and at a wider viewing angle via the second light guide pattern GP2, thereby improving the quality of images and videos provided at a wide viewing angle.

[0131] Although Figure 8 only describes the light L4 emitted from the second light source LS2, the same explanation can be applied to the light emitted from the first light source LS1.

[0132] As a result, even if the second display area DA2 is configured to be switchable between share mode and privacy mode, the shape and arrangement of the second light guide pattern GP2 can suppress or minimize the degradation of image and video quality provided in both share mode and privacy mode.

[0133] Furthermore, by arranging the first light guide pattern GP1 in the first display area DA1, which operates only in share mode, the quality of images and videos provided at a wide viewing angle can be improved. In the second display area DA2, which operates in a switchable manner between share mode and privacy mode, by arranging a second light guide pattern GP2, which is different from the first light guide pattern GP1, the degradation of the quality of images and videos provided at wide and narrow viewing angles can be suppressed or minimized.

[0134] The third light guide pattern GP3 may be arranged on the side surface of the base substrate SB. The third light guide pattern GP3 may protrude from the base substrate SB toward the second light source LS2. Multiple third light guide patterns GP3 may be provided. Each of the multiple third light guide patterns GP3 may extend in the first direction DR1. Multiple third light guide patterns GP3 may be arranged across the first display area DA1 and the second display area DA2. Multiple third light guide patterns GP3 may be repeatedly arranged along the third direction DR3.

[0135] Light emitted from the second light source LS2 and incident toward the third light guide pattern GP3 may be refracted to one side and the other side of the third direction DR3 as it passes through the third light guide pattern GP3. Through the third light guide pattern GP3, the light emitted from the second light source LS2 can be guided toward the upper surface of the base substrate SB.

[0136] The fourth light guide pattern GP4 may be positioned on the underside (backside) of the base substrate SB. The underside of the base substrate SB may refer to the surface facing the prism sheet 124. To describe the fourth light guide pattern GP4 in more detail, refer to Figures 9 to 11.

[0137] Figure 9 is a cross-sectional view taken along line B-B' in Figure 6. Figure 10 is a schematic diagram showing the fourth light guide pattern GP4 according to one embodiment. Figure 11 is a graph showing the density along the second direction of the fourth light guide pattern GP4 according to one embodiment.

[0138] In Figure 11, the horizontal axis (X-axis) represents the position of the base substrate SB in the second direction DR2, and the vertical axis (Y-axis) represents the density of the fourth light guide pattern GP4 per unit area. That is, the vertical axis (Y-axis) represents the position from one side of the base substrate SB in the second direction DR2 to the other side of the second direction DR2. The higher the density of the fourth light guide pattern GP4 per unit area, the more fourth light guide patterns GP4 can be placed per unit area.

[0139] Furthermore, referring to Figures 9 to 11, a fourth light guide pattern GP4 having a polygonal protruding shape may be formed on the lower surface (back surface) of the base substrate SB. The fourth light guide pattern GP4 may be formed convexly on the back surface of the base substrate SB by injection or printing. In other embodiments, the fourth light guide pattern GP4 may be formed as a recessed concave shape on the back surface of the base substrate SB.

[0140] In one embodiment, the fourth light guide pattern GP4 may have a pyramidal shape. In this case, the fourth light guide pattern GP4 may have a symmetrical shape in which the inclinations of all four sides forming the pyramid are the same or substantially similar. This allows the light emitted from the second light source package 131, which is positioned on one and the other side of the second direction DR2 of the base substrate SB, to be uniformly refracted or dispersed on one and the other side of the first direction DR1, and a portion of the display area DA corresponding to the area where the second light source LS2 is turned on can operate more smoothly in share mode.

[0141] In one embodiment, the length L of one side of the symmetrical pyramid is approximately 10 μm to 50 μm, and may be, for example, approximately 30 μm. Also in one embodiment, the angle a between the back surface of the base substrate SB and one side surface of the symmetrical pyramid is approximately 20° to 60°, and may be, for example, approximately 40°. The angle c between the back surface of the second light guide plate 132 and the other side surface of the symmetrical pyramid is approximately 20° to 60°, and may be, for example, approximately 40°. The apex angle b of the symmetrical pyramid may be approximately 100°.

[0142] The angle a between the back surface of the base substrate SB and one side surface of the symmetrical pyramid, and the angle c between the back surface of the base substrate SB and the other side surface of the symmetrical pyramid, may be the same, but the present invention is not limited thereto.

[0143] The height h1 of the symmetrical pyramid may be determined based on its size and the inclination of its four sides, for example, 5 μm to 30 μm. However, this embodiment is not limited thereto.

[0144] The emission angle of light incident on the second light guide plate 132 from the second light source package 131 may be controlled by a fourth light guide pattern GP4 formed on the back surface. By forming the fourth light guide pattern GP4 in a symmetrical pyramidal or dot shape, the light emitted from the second light source packages 131, positioned on one and the other sides of the second direction DR2 of the second light guide plate 132, may be refracted by the four faces or curved surfaces of the fourth light guide pattern GP4. As a result, the light emitted from the second light source package 131 can be refracted and emitted not only in the second direction DR2 but also in the first direction DR1 by the fourth light guide pattern GP4.

[0145] When light emitted from the second light source package 131 passes through the second light guide plate 132, it may be refracted by the fourth light guide pattern GP4 to one side and the other side of the first direction DR1 and emitted, and the light emitted from the second light source package 131 may be emitted with a wide angle in the first direction DR1.

[0146] The fourth light guide pattern GP4 may be arranged at regular or irregular intervals. The density per unit area of ​​the fourth light guide pattern GP4 may vary depending on the position of the second light guide plate 132.

[0147] The density per unit area of ​​the fourth light guide pattern GP4 may vary depending on the second direction DR2.

[0148] As shown in Figure 11, on the base substrate SB, the density of the fourth light guide pattern GP4 per unit area may decrease as it approaches the second light source package 131 and increase as it moves away from the second light source package 131. By arranging the second light source package 131 on both sides of the second direction DR2 of the base substrate SB, the density of the fourth light guide pattern GP4 per unit area on the base substrate SB may increase as it approaches the center along the second direction DR2 and decrease as it approaches one side and the other side of the second direction DR2 from the center.

[0149] As the density per unit area of ​​the fourth light guide pattern GP4 increases with distance from the second light source package 131, even if the amount of light reaching the area is insufficient due to the distance from the second light source package 131, the proportion of light refracted or dispersed in the first direction DR1 can be increased by more of the fourth light guide pattern GP4.

[0150] Therefore, the light passing through the second light guide plate 132 becomes more uniform across the entire display area DA. Furthermore, the uniformity of brightness according to the viewing angle of the display device 1 can be improved.

[0151] The density per unit area of ​​the fourth light guide pattern GP4 on the base substrate SB may be the same along the first direction DR1, but the present invention is not limited thereto.

[0152] Other embodiments of this specification are described below. Components included in other embodiments that are substantially the same as those described with reference to Figures 1 to 11 are denoted by the same reference numerals, and redundant components may be omitted or simplified.

[0153] Figure 12 is a plan view of a display device according to another embodiment. Figure 13 is a perspective view of the second light guide plate and its surroundings according to another embodiment.

[0154] Referring to Figures 12 and 13, the display area DA_1 of the display device 1_1 according to this embodiment may further include a third display area DA3 in addition to the first display area DA1 and the second display area DA2.

[0155] The third display area DA3 may overlap with a portion of at least one of the first display area DA1 and the second display area DA2.

[0156] Within the third display area DA3, a display boundary BD may be located, which is the boundary between the first display area DA1 and the second display area DA2. The display boundary BD extends in the second direction DR2 and can move to one side and the other side of the first direction DR1 within the third display area DA3. Depending on the position of the display boundary BD, at least one of the first display area DA1 and the second display area DA2 may overlap with the third display area DA3.

[0157] The sizes of the first display area DA1 and the second display area DA2 are variable depending on the position of the display boundary BD.

[0158] Some of the multiple second light sources LS2, which are located in at least a portion of the area, may be driven (turned on and turned off) independently. This makes the size of the first display area DA1 and the second display area DA2 variable.

[0159] The second light source LS2, which can be turned on and off, makes it possible to switch the second display area DA2 between privacy mode and share mode. Therefore, by adjusting the number and position of the second light source LS2 that are turned on from among the second light source LS2 corresponding to the third display area DA3, the display boundary BD, which is the boundary between the first display area DA1 and the second display area DA2, can be adjusted to one side and the other side of the first direction DR1.

[0160] Here, the second light source LS2 corresponding to the third display area DA3 refers to the second light source LS2 among the multiple second light sources LS2 that are arranged on one side and the other side of the second direction DR2 of the third display area DA3.

[0161] In other words, depending on the position of the second light source LS2, which can be switched on and off, the size of the first display area DA1 and the second display area DA2 changes, and the position of the display boundary BD, which is the boundary between the first display area DA1 and the second display area DA2, may change.

[0162] In this case, by arranging the second light source package 131 so as to face the long side of the second light guide plate 132, it becomes easier to change the size of the first display area DA1 and the second display area DA2.

[0163] The first light guide pattern GP1 may be placed only on the side of the third display area DA3 that is not in the first direction DR1. The first light guide pattern GP1 may be placed only on a part of the first display area DA1 that does not overlap with the third display area DA3, even if the position of the display boundary BD changes.

[0164] The second light guide pattern GP2 may be positioned across the second display area DA2 and the third display area DA3. The second light guide pattern GP2 may be positioned across the second display area DA2 and the third display area DA3 even if the position of the display boundary BD changes, and may also be positioned where the second display area DA2 and the third display area DA3 overlap.

[0165] In the second display area DA2 and the third display area DA3, a portion of the base substrate SB may be exposed and not covered by the second light guide pattern GP2.

[0166] By making the sizes of the first display area DA1 and the second display area DA2 variable, the user of the display device 1 can be provided with improved convenience. Furthermore, the efficiency of the display device 1 is improved, and the manufacturing process of the display device 1 is simplified, thus reducing power consumption and production energy.

[0167] Even in this case, by arranging the second light guide pattern GP2 across the second display area DA2 and the third display area DA3, it is possible to suppress or minimize the degradation of image and video quality provided in both share mode and privacy mode, even if the size of the second display area DA2 is variable.

[0168] Figure 14 is a plan view of a display device according to another embodiment. Figure 15 is a perspective view of a second light guide plate and its surroundings according to another embodiment.

[0169] Referring to Figures 14 and 15, the display area DA_2 of the display device 1_2 according to this embodiment includes a first display area DA1, a second display area DA2, and a third display area DA3, but differs from the embodiments shown in Figures 12 and 13 in that both the first light guide pattern GP1 and the second light guide pattern GP2 may be arranged in the third display area DA3.

[0170] The third display area DA3 may contain both the first light guide pattern GP1 and the second light guide pattern GP2, which may be arranged alternately and repeatedly along the first direction DR1, but the present invention is not limited thereto.

[0171] In the first display area DA1, which does not overlap with the third display area DA3, only the first light guide pattern GP1 may be placed. In the second display area DA2, which does not overlap with the third display area DA3, only the second light guide pattern GP2 may be placed.

[0172] By further arranging the first light guide pattern GP1 in the third display area DA3, even if the size of the first display area DA1 and the second display area DA2 are variable in the third display area DA3, it is possible to suppress or minimize the degradation of the quality of images and videos provided in the wide viewing angle of the share mode operating in the third display area DA3.

[0173] Furthermore, since the second light guide pattern GP2 is also positioned, it is possible to suppress or minimize the degradation of image and video quality provided in the narrow viewing angle of the privacy mode operating in the third display area DA3.

[0174] Display devices according to various embodiments of this specification can be described as follows.

[0175] A display device according to an embodiment of this specification includes a display area including a first display area and a second display area arranged along a first direction; a plurality of first light sources arranged within the display area; a diffusion sheet arranged on the plurality of first light sources; a light emission control film arranged on the diffusion sheet; a base substrate arranged on the light emission control film; a light guide plate arranged on the base substrate and including a first light guide pattern and a second light guide pattern; and a plurality of second light sources arranged facing the side surface of the light guide plate, wherein the first light guide pattern and the second light guide pattern have different shapes from each other, the first light guide pattern is arranged in the first display area, and the second light guide pattern is arranged in the second display area.

[0176] According to various embodiments of this specification, the first light guide pattern may cover the entire first display area of ​​the base substrate, and the second light guide pattern may cover a portion of the second display area of ​​the base substrate, leaving the remaining portion exposed.

[0177] According to various embodiments of this specification, the second light guide pattern may be positioned around at least one end of the base substrate in a second direction intersecting the first direction.

[0178] According to various embodiments of this specification, the second light guide pattern extends from the edge of the base substrate along the second direction, and the size of the cross-section obtained by cutting the second light guide pattern in the first direction may decrease as it moves further away from the edge of the base substrate.

[0179] According to various embodiments of this specification, the size of the cross-section obtained by cutting the first light guide pattern in the first direction may be constant along the second direction.

[0180] According to various embodiments of this specification, the second light guide pattern may include a plurality of second light guide patterns, the plurality of second light guide patterns may be repeatedly arranged along the first direction.

[0181] According to various embodiments of this specification, the first light guide pattern comprises a plurality of first light guide patterns, the plurality of first light guide patterns are repeatedly arranged along a first direction, and each of the plurality of first light guide patterns may extend along a second direction.

[0182] According to various embodiments of this specification, the first display area may operate in a share mode with a wide viewing angle, and the second display area may operate in a switchable manner between a share mode with a wide viewing angle and a privacy mode with a narrow viewing angle.

[0183] According to various embodiments of this specification, when the second display area operates in share mode, some of the plurality of second light sources corresponding to the second display area may be in a turn-on state, and when the second display area operates in privacy mode, some of the plurality of second light sources corresponding to the second display area may be in a turn-off state.

[0184] According to various embodiments of this specification, the plurality of second light sources are repeatedly arranged along the first direction and are positioned opposite at least one side of the light guide plate in the second direction, and the second direction may intersect the first direction.

[0185] According to various embodiments of this specification, the first light guide pattern and the second light guide pattern may be arranged on the upper surface of the base substrate.

[0186] According to various embodiments of this specification, the third light guide pattern is further provided on the side surface of the base substrate, wherein the third light guide pattern comprises a plurality of third light guide patterns, the plurality of third light guide patterns are repeatedly arranged along the thickness direction and may extend along the first direction.

[0187] According to various embodiments of this specification, the plurality of third light guide patterns may face the plurality of second light sources.

[0188] According to various embodiments of this specification, the display area may further include a third display area on which a display boundary, which is the boundary between the first display area and the second display area, can move along a first direction.

[0189] According to various embodiments of this specification, the third display area may overlap with at least one of the first display area and the second display area.

[0190] According to various embodiments of this specification, the second light guide pattern may be arranged across the first display area and the second display area.

[0191] A display device according to an embodiment of this specification includes a display area including a first display area and a second display area; a plurality of first light sources disposed within the display area; a diffusion sheet disposed on the plurality of first light sources; a light emission control film disposed on the diffusion sheet; a light guide plate disposed on the light emission control film and including a base substrate and a first light guide pattern and a second light guide pattern disposed on the base substrate; and a plurality of second light sources disposed opposite the side surface of the light guide plate, wherein the first light guide pattern is disposed in the first display area and the second light guide pattern is disposed in the second display area, and the second light guide pattern covers a portion of the second display area of ​​the base substrate and exposes the remaining portion.

[0192] According to various embodiments of this specification, the first light guide pattern may cover the entire first display area of ​​the base substrate.

[0193] According to various embodiments of this specification, the first light guide pattern and the second light guide pattern may have different shapes from each other.

[0194] According to various embodiments of this specification, the first display area may operate in a share mode with a wide viewing angle, and the second display area may operate in a switchable manner between a share mode with a wide viewing angle and a privacy mode with a narrow viewing angle.

[0195] While embodiments have been described above with reference to the attached drawings, those skilled in the art in the field to which this specification belongs will understand that the above-described technical configurations can be implemented in other specific forms without altering the technical idea or essential features. Therefore, the above embodiments should be understood to be illustrative and not restrictive in any respect. Furthermore, the scope of the embodiments is indicated by the claims, which will be discussed later, rather than by the detailed description. In addition, all modifications or altered forms derived from the meaning and scope of the claims, and equivalent concepts thereto, should be interpreted as being included within the scope of the embodiments. [Explanation of symbols]

[0196] 1:Display device DA:Display area NDA: Hidden area 110: Display Panel 120: First backlight unit 121: First light source package 122: 1st light guide plate 123: Diffusion Sheet 124: Prism Sheet 125: Idemitsu Control Film 130: Second backlight unit 131: Second light source package 132:Second light guide plate SB: Base board GP: Light guide pattern

Claims

1. A display area including a first display area and a second display area arranged along a first direction, A plurality of first light sources arranged within the display area, A diffusion sheet arranged on the plurality of first light sources, A light emission control film placed on the diffusion sheet, Disposed on the light emission control film, a base substrate, and a light guide plate disposed on the base substrate, including a first light guide pattern and a second light guide pattern, A plurality of second light sources are arranged to face the side surface of the light guide plate, Includes, The first light guide pattern and the second light guide pattern have different shapes, the first light guide pattern is arranged in the first display area, and the second light guide pattern is arranged in the second display area. Display device.

2. The first light guide pattern covers the entire first display area of ​​the base substrate. The second light guide pattern covers a portion of the second display area of ​​the base substrate, leaving the remaining portion exposed. The display device according to claim 1.

3. The display device according to claim 2, wherein the second light guide pattern is arranged around at least one end of the base substrate in a second direction intersecting the first direction, one side and the other side.

4. The second light guide pattern extends from the edge of the base substrate along the second direction, The size of the cross-section obtained by cutting the second light guide pattern in the first direction decreases as it moves further away from the edge of the base substrate. The display device according to claim 3.

5. The display device according to claim 4, wherein the size of the cross-section obtained by cutting the first light guide pattern in the first direction is constant along the second direction.

6. The display device according to claim 3, wherein the second light guide pattern includes a plurality of second light guide patterns, and the plurality of second light guide patterns are repeatedly arranged along the first direction.

7. The display device according to claim 6, wherein the first light guide pattern comprises a plurality of first light guide patterns, the plurality of first light guide patterns are repeatedly arranged along the first direction, and each of the plurality of first light guide patterns extends along the second direction.

8. The first display area operates in a share mode with a wide viewing angle, The second display area operates in a way that allows switching between a share mode with a wide viewing angle and a privacy mode with a narrow viewing angle. The display device according to claim 1.

9. When the second display area operates in share mode, some of the plurality of second light sources corresponding to the second display area are in a turned-on state. When the second display area operates in privacy mode, some of the multiple second light sources corresponding to the second display area are in a turned-off state. The display device according to claim 8.

10. The plurality of second light sources are repeatedly arranged along the first direction and are positioned to face at least one side of the light guide plate in the second direction, The second direction intersects the first direction. The display device according to claim 9.

11. The display device according to claim 1, wherein the first light guide pattern and the second light guide pattern are arranged on the upper surface of the base substrate.

12. The present invention further includes a third light guide pattern disposed on the side surface of the base substrate, The third light guide pattern includes a plurality of third light guide patterns, the plurality of third light guide patterns are repeatedly arranged along the thickness direction and extend along the first direction. The display device according to claim 11.

13. The display device according to claim 12, wherein the plurality of third light guide patterns face the plurality of second light sources.

14. The display device according to claim 1, wherein the display area further includes a third display area on which a display boundary, which is the boundary between the first display area and the second display area, can move along a first direction.

15. The display device according to claim 14, wherein the third display area overlaps with at least one of the first display area and the second display area.

16. The display device according to claim 15, wherein the second light guide pattern is arranged across the first display area and the second display area.

17. A display area including the first display area and the second display area, A plurality of first light sources arranged within the display area, A diffusion sheet arranged on the plurality of first light sources, A light emission control film placed on the diffusion sheet, A light guide plate is disposed on the light emission control film and includes a base substrate and a first light guide pattern and a second light guide pattern disposed on the base substrate, A plurality of second light sources are arranged to face the side surface of the light guide plate, Includes, The first light guide pattern is arranged in the first display area, and the second light guide pattern is arranged in the second display area. The second light guide pattern covers a portion of the second display area of ​​the base substrate, leaving the remaining portion exposed. Display device.

18. The display device according to claim 17, wherein the first light guide pattern covers the entire first display area of ​​the base substrate.

19. The display device according to claim 18, wherein the first light guide pattern and the second light guide pattern have different shapes from each other.

20. The first display area operates in a share mode with a wide viewing angle, The second display area operates in a way that allows switching between a share mode with a wide viewing angle and a privacy mode with a narrow viewing angle. The display device according to claim 17.

Images