Display device having viewing angle control film

Abstract

To provide a display device having a view angle control film, capable of reducing an interference phenomenon between the view angle control film and a panel to effectively block an unnecessary view angle.SOLUTION: A display device according to one example of the present specification comprises a display panel, and a viewing angle control film 200 arranged on the display panel. The viewing angle control film comprises a plurality of shading patterns 250 that blocks light traveling in a side face direction excluding a front direction of the display panel in a viewing angle control mode. Each of the plurality of shading patterns has a thickness within a range of 8 to 25% of a pixel size of the display panel, and an interval within a range of 33 to 39% of the pixel size. An inclination angle of the shading pattern can have an angle within a range of ±5 degrees to 15 degrees with reference to 90 degrees.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present specification relates to a display device having a viewing angle control film that can reduce the interference phenomenon between a panel and the viewing angle control film and effectively block light at unnecessary viewing angles. [Background technology]

[0002] Among the display devices installed in automobiles, the display device placed in front of the passenger seat provides the necessary images to the passenger seat user, but is equipped with a viewing angle control film that blocks light emitted toward the driver so as not to disturb the driver when the automobile is moving.

[0003] The viewing angle control film disposed on the display panel has a light-shielding pattern for controlling the viewing angle. This causes a moire artifact, which is an interference phenomenon between the pixel structure of the display panel and the light-shielding pattern of the viewing angle control film, and the display performance is deteriorated. Therefore, a method for reducing the moire artifact is required.

[0004] Furthermore, the viewing angle control film is required to have a method of effectively blocking light from unnecessary viewing angles toward the driver.

[0005] The contents of the above-mentioned background art are technical information that the inventors of this specification possessed in order to derive the examples of this specification or that they acquired in the process of deriving the examples of this specification, and cannot necessarily be considered as publicly known art that was disclosed to the general public prior to the filing of this specification. Summary of the Invention [Problem to be solved by the invention]

[0006] The present specification provides a display device having a viewing angle control film that can reduce the interference phenomenon between a panel and a viewing angle control film and effectively block unnecessary viewing angles.

[0007] The problems to be solved by the examples of this specification are not limited to those mentioned above, and other problems not mentioned will be clearly understood by a person having ordinary skill in the art to which the technical ideas of this specification belong from the following description. [Means for solving the problem]

[0008] A display device according to one example of the present specification includes a display panel and a viewing angle control film arranged on the display panel, the viewing angle control film including a plurality of light-shielding patterns that block light traveling in a lateral direction except for a front direction of the display panel in a viewing angle control mode, each of the plurality of light-shielding patterns having a thickness in a range of 8 to 25% of a pixel size of the display panel and a spacing in a range of 33 to 39% of the pixel size, and an inclination angle of the light-shielding patterns may be in a range of ±5 degrees to 15 degrees based on 90 degrees.

[0009] The viewing angle control film includes a first substrate on which a first transparent electrode is arranged, a second substrate on which a second transparent electrode is arranged, and a transparent insulating layer arranged between the first substrate and the second substrate and having a groove portion in which a plurality of light-shielding patterns are arranged, and the light-shielding height of each of the plurality of light-shielding patterns can be changed between a viewing angle control mode and a viewing angle non-control mode depending on a driving voltage applied to the first transparent electrode and the second transparent electrode.

[0010] The viewing angle control film is positioned in a lateral direction of the display panel, and at least one of the thickness, spacing, and height of the plurality of shading patterns can be set to be different depending on the position on the display panel, taking into account the position of the viewer to which the viewing angle control mode is applied.

[0011] In the viewing angle control film, a second spacing of a second shading pattern located at a second position farther from the viewer than a first spacing of a first shading pattern located at a first position close to the viewer is set wider, and the first shading pattern and the second shading pattern may have the same thickness and the same height.

[0012] In the viewing angle control film, the second thickness of the second shading pattern located at a second position farther from the viewer than the first thickness of the first shading pattern located at a first position close to the viewer is set to be thinner, the second distance between the second shading patterns is set wider than the first distance between the first shading patterns, and the first shading pattern and the second shading pattern may have the same height.

[0013] In the viewing angle control film, a second height of a second shading pattern located at a second position farther from the viewer than a first height of a first shading pattern located at a first position close to the viewer is set lower than the first height of the first shading pattern located at the first position close to the viewer, the first shading pattern and the second shading pattern have the same thickness, and the spacing between the first shading patterns and the second shading patterns are the same.

[0014] In the viewing angle control film, the second thickness of the second shading pattern located at a second position farther from the viewer than the first thickness of the first shading pattern located at a first position close to the viewer is set to be thinner, the second spacing between the second shading patterns is set to be wider than the first spacing between the first shading patterns, and the second height of the second shading pattern is set to be lower than the first height of the first shading pattern.

[0015] In the viewing angle control film, the distance between the light-shielding patterns may be gradually increased as the distance between the viewer and the light-shielding patterns increases.

[0016] In the viewing angle control film, as the distance between the viewer and the light-shielding pattern increases, the interval between the light-shielding patterns gradually increases, and the thickness of the light-shielding pattern gradually decreases.

[0017] In the viewing angle control film, the height of the light-shielding pattern may be gradually reduced as the distance between the viewer and the light-shielding pattern increases.

[0018] In the viewing angle control film, as the distance between the viewer and the light-shielding patterns increases, the thickness of the light-shielding patterns gradually decreases, and the height of the light-shielding patterns gradually decreases.

[0019] The spacing between the shading patterns, which increases with the distance between the viewer and the shading patterns, can be set within a threshold that limits the spacing to a range of 33-39% of the pixel size.

[0020] In the viewing angle control film, the transmittance deviation of the viewing angle control film caused by the intervals between the plurality of light-shielding patterns which differ according to the positions of the display panel can be compensated for by adjusting the brightness of the display panel.

[0021] Specific matters relating to the various aspects of the present specification other than the means for solving the problems mentioned above are included in the following description and drawings. Effect of the Invention

[0022] A display device according to one example of the present specification has a viewing angle control film having a range of thicknesses, angles, and spacings of light-shielding patterns derived to minimize moire artifacts, thereby minimizing moire artifacts and improving display performance without being affected by the shape and size of the pixels of the display panel.

[0023] In a display device according to an example of the present specification, the viewing angle control film applies a difference in at least one of the spacing, thickness, and height of the shading pattern depending on the position on the display panel that differs in distance from the driver, thereby effectively blocking unnecessary light from the viewing angle toward the driver while improving the brightness of the image provided to the viewer in the passenger seat and reducing the manufacturing cost of the viewing angle control film.

[0024] A display device according to an example of the present specification can provide uniform brightness by compensating for position-specific brightness deviations caused by application of differences in at least one of the spacing and thickness of the light-shielding patterns in the viewing angle control film through brightness adjustment of the display panel, thereby improving display performance, improving brightness, and reducing power consumption. [Brief description of the drawings]

[0025] [Figure 1] 1 is a diagram illustrating a schematic configuration of a display device having a viewing angle control film according to an embodiment. [Diagram 2] 1 is a three-dimensional view showing a configuration of a view angle control film according to an embodiment. [Diagram 3] FIG. 2 is a top view of a viewing angle control film according to an embodiment. [Figure 4A] 4A and 4B are diagrams illustrating the operating states of a viewing angle control mode and a viewing angle non-control mode of a viewing angle control film according to an embodiment. [Figure 4B] 4A and 4B are diagrams illustrating the operating states of a viewing angle control mode and a viewing angle non-control mode of a viewing angle control film according to an embodiment. [Figure 5A] 4A and 4B are diagrams illustrating the operating states of a viewing angle control mode and a viewing angle non-control mode of a viewing angle control film according to an embodiment. [Figure 5B] 4A and 4B are diagrams illustrating the operating states of a viewing angle control mode and a viewing angle non-control mode of a viewing angle control film according to an embodiment. [Figure 6] 1 is a diagram illustrating a moire artifact phenomenon in a display device according to a related art. [Figure 7] 1 is a flowchart showing a method for deriving a design range of a view angle control film according to an embodiment. [Figure 8A] FIG. 11 is a diagram showing design variables of a light blocking pattern in a view angle control film according to an embodiment. [Figure 8B] FIG. 11 is a diagram showing design variables of a light blocking pattern in a view angle control film according to an embodiment. [Figure 9A]FIG. 2 is a diagram showing a target design range of a view angle control film according to an embodiment. [Figure 9B] FIG. 2 is a diagram showing a target design range of a view angle control film according to an embodiment. [Figure 9C] FIG. 2 is a diagram showing a target design range of a view angle control film according to an embodiment. [Figure 10] 11 is a diagram showing a moire level according to a change in pixel size and shape of a display device having a viewing angle control film according to an embodiment. [Figure 11] 11A and 11B are diagrams illustrating different application of the spacing between light blocking patterns of a view angle control film according to an embodiment. [Figure 12] 13A and 13B are diagrams illustrating different thicknesses of a light-shielding pattern of a view angle control film according to an embodiment. [Figure 13A] FIG. 11 is a diagram showing an adjustment range of the spacing of light-shielding patterns in a view angle control film according to an embodiment. [Figure 13B] FIG. 11 is a diagram showing an adjustment range of the spacing of light-shielding patterns in a view angle control film according to an embodiment. [Figure 14] 13A and 13B are diagrams illustrating different heights of a light blocking pattern of a viewing angle control film according to an embodiment. [Figure 15] 11A and 11B are diagrams showing different applications of the spacing, thickness, and height of a light-shielding pattern of a view angle control film according to an embodiment. [Figure 16] 11A and 11B are diagrams illustrating a method of compensating for a luminance deviation caused by applying a difference in the spacing between light blocking patterns of a viewing angle control film according to an embodiment. [Figure 17] 11A and 11B are diagrams illustrating a method of compensating for a luminance deviation caused by applying a difference in the spacing between light blocking patterns of a viewing angle control film according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] The advantages and features of the present specification, and the methods for achieving them, will become clear with reference to the following detailed description of the embodiments together with the accompanying drawings. However, the present specification is not limited to the embodiments disclosed below, and may be realized in various different forms. The embodiments are merely provided to complete the disclosure of the specification and to fully inform those skilled in the art of the invention to which the specification pertains, and the specification is defined only by the scope of the claims.

[0027] In order to explain the embodiments of the present specification, the shapes, sizes, ratios, angles, numbers, etc. shown in the drawings are illustrative and the present specification is not limited to the matters shown in the drawings. The same reference symbols refer to the same components throughout the specification. In addition, in explaining this specification, if a specific description of related known technology is determined to unnecessarily obscure the gist of the present invention, the detailed description will be omitted. When "including," "having," "consisting of," etc. are used in this specification, other parts can be added unless "only" is used. When a component is expressed in the singular, it includes the case where it includes a plurality unless otherwise explicitly stated.

[0028] When interpreting elements, they are to be interpreted as including a range of error even if there is no separate explicit description.

[0029] When describing a location, for example when describing the location of two parts using "on top of," "at the top of," "below," "beside," etc., one or more other parts may be located between the two parts, unless "immediately" or "directly" is used.

[0030] When describing a temporal relationship, for example when the temporal sequence is described using "after", "following", "next to", "before", etc., it can also include cases where the events are not consecutive, since "immediately" or "directly" are not used.

[0031] Although the terms "first", "second" and the like are used to describe various components, these components are not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, the first component referred to below may be the second component within the technical concept of the present invention.

[0032] In describing components in this specification, terms such as first, second, A, B, a, b, etc. may be used. These terms are used to distinguish the components from other components, and do not limit the nature, order, sequence, or number of the components. When a component is described as being "connected," "coupled," or "connected" to another component, it should be understood that the component can be directly connected or connected to the other component, but other components may also be "intervening" between each component that can be indirectly connected or connected unless otherwise explicitly described.

[0033] The term "at least one" should be understood to include all possible combinations of one or more of the associated items. For example, the meaning of "at least one of a first, second, and third element" may include all combinations of two or more elements from among the first, second, and third elements, and not just the first, second, or third element.

[0034] The features of the various embodiments of this specification may be partially or fully combined or combined with each other, and various technical interlocking and driving mechanisms may be possible, and each embodiment may be implemented independently of each other, or may be implemented together in a related relationship.

[0035] The present invention will be described in detail with reference to the accompanying drawings and examples as follows: The scales of the components shown in the drawings are different from the actual scales for the convenience of explanation, and therefore, the scales are not limited to those shown in the drawings.

[0036] FIG. 1 is a diagram showing a schematic configuration of a display device having a viewing angle control film according to one embodiment, FIG. 2 and FIG. 3 are a three-dimensional view and a top view showing the viewing angle control film according to one embodiment, and FIG. 4A, 4B, 5A, and 5B are diagrams showing the operating states of a viewing angle control film according to one embodiment in a viewing angle control mode and a viewing angle non-control mode.

[0037] Referring to FIG. 1, a display device according to an embodiment may include a viewing angle control film 200 and a cover substrate 300 disposed on a display panel 100 .

[0038] The display panel 100 may include a display unit 110 including a pixel array in which a plurality of pixels are arranged, a polarizing plate 120 arranged on the display unit 110, and a touch sensor 130 arranged on the polarizing plate 120. The touch sensor 130 in the display panel 100 may be omitted.

[0039] The display panel 100 may be any one of various display panels including a liquid crystal display panel, an electroluminescent display panel, a micro LED (Light Emitting Diode) display panel, etc. The electroluminescent display panel may be an organic light emitting diode (OLED) display panel, a quantum-dot light emitting diode (QD) display panel, or an inorganic light emitting diode (ILD) display panel.

[0040] Referring to Figures 2 and 3, the viewing angle control film 200 may include a first substrate 210 having a first transparent electrode arranged thereon, a second substrate 220 having a second transparent electrode arranged thereon, a transparent insulating layer 230 arranged between the first and second substrates 210, 220, and a light-shielding pattern 250 arranged in a plurality of grooves formed in the transparent insulating layer 230.

[0041] The first transparent electrode disposed on the first substrate 210 and the second transparent electrode disposed on the second substrate 220 can receive a driving voltage applied from a driving circuit via an FPC (260).

[0042] The light-blocking pattern 250 may be made of a light-blocking material that absorbs light, and may be made of electronic ink including light-blocking particles that flow in response to a voltage applied to the first and second transparent electrodes.

[0043] The light blocking pattern 250 is disposed to overlap a display area 240 in which a pixel array for displaying an image is located in the display panel 100. The display area 240 has a structure surrounded by a bezel area 242. The light blocking pattern 250 may be disposed in a diagonal line shape in the display area 240, but is not limited to this, and may be disposed in various other shapes.

[0044] The light blocking pattern 250 is driven by a driving voltage applied to the first and second transparent electrodes of the first and second substrates 210 and 220, and the light blocking height can be adjusted according to a viewing angle control mode and a viewing angle non-control mode.

[0045] 4A and 5A, in the viewing angle control mode, the viewing angle control film 200 is driven by a first driving voltage applied to the first and second transparent electrodes of the first and second substrates 210 and 220, and the light blocking pattern 250 is diffused throughout the groove of the transparent insulating layer 230, so that the light blocking height of the light blocking pattern 250 can be increased to be equal to the height of the groove. In the viewing angle control mode, the viewing angle control film 200 can transmit light emitted from the display panel 100 in the front direction, but the light traveling in the left and right lateral directions where the driver is located can be blocked by the light blocking pattern 250.

[0046] 4B and 5B, in the viewing angle non-control mode, the viewing angle control film 200 is driven by a second driving voltage applied to the first and second transparent electrodes of the first and second substrates 210 and 220, and the light-shielding height of the light-shielding pattern 250 can be reduced so that the light-shielding pattern 250 is located only at the bottom of the transparent insulating layer 230 adjacent to the display panel 100. In the viewing angle non-control mode, the viewing angle control film 200 can transmit light emitted from the display panel 100 in both the front and side directions. Thus, when the driver wishes to view an image displayed on the display panel 100, such as when not driving a car, the viewing angle control film 200 is driven in the viewing angle non-control mode to provide the image displayed on the display panel 100 to both the driver and the viewer in the passenger seat.

[0047] FIG. 6 is a diagram illustrating a moire artifact phenomenon in a display device according to the related art.

[0048] Referring to FIG. 6, in a display device 500 arranged facing the passenger seat of a car, when the viewing angle control film is operated in a viewing angle control mode, light toward the driver is blocked and the driver can see a black screen 500A, but a viewer in the passenger seat can see an image 500B in which moire artifacts are generated by the viewing angle control film.

[0049] In order to reduce such moire artifacts, the design range of the viewing angle control film according to an embodiment can be derived as follows.

[0050] FIG. 7 is a flowchart showing a method for deriving the design range of the view angle control film according to one embodiment.

[0051] 7, in the method of deriving the design range of the viewing angle control film according to an embodiment, the specification (pixel size) of the display panel is applied (S702), any specification (thickness, interval, inclination angle of the light-shielding pattern) of the viewing angle control film is applied (S704), moire artifacts are simulated (S706), and the level of moire can be evaluated (S708). If the evaluation score of the moire pattern is greater than the threshold value (th) (S710), the corresponding specification (thickness, interval, inclination angle of the light-shielding pattern) of the viewing angle control film can be determined as a design range suitable for the viewing angle control film (S712). On the other hand, if the evaluation score of the moire pattern is equal to or less than the threshold value (th) (S710), the corresponding specification (thickness, interval, inclination angle of the light-shielding pattern) of the viewing angle control film can be excluded from the design range (S714). By repeating this method of deriving the design range of the viewing angle control film, the design of the viewing angle for reducing the moire artifacts can be determined as the design range of the viewing angle control film (S712).

[0052] A method for deriving the design range of a viewing angle control film according to one embodiment repeats the process of FIG. 7 to calculate the target ranges of the thickness, spacing, and angle of the shading pattern, which are the three design elements of a viewing angle control film that can reduce moiré artifacts.

[0053] 8A and 8B are diagrams showing design variables of a view angle control film according to an embodiment, and Figs. 9A-9C are diagrams showing target design ranges of a view angle control film according to an embodiment.

[0054] 8A and 8B, in one embodiment of the viewing angle control film 200, the spacing (W) between the light blocking patterns 250, the thickness (d) of the light blocking patterns 250, and the inclination angle (θ) of the light blocking patterns 250 may have optimal design ranges in order to reduce moire artifacts.

[0055] For example, in order to reduce moire artifacts, it is preferable that the thickness (d) of the light shielding pattern 250 in the viewing angle control mode of the viewing angle control film according to one embodiment is in the range of 8 to 25% of the pixel size, the interval (W) between the light shielding patterns 250 is in the range of 33 to 39% of the pixel size, and the inclination angle (θ) of the light shielding pattern 250 is designed to be in the range of ±5 degrees to 15 degrees based on 90 degrees, that is, in the range of 95 degrees to 105 degrees, or 75 degrees to 85 degrees. Note that the pixel size means the pitch of the pixel or the width of the pixel.

[0056] Referring to Figures 9A-9C, it can be seen that under conditions in which the thickness of the light-shielding pattern (Resin) is 8%, 16%, and 25% of the pixel size, the spacing of the light-shielding pattern (Resin) is in the range of 33 to 39% of the pixel size, the inclination angle of the light-shielding pattern is in the design range of ±5 degrees to 15 degrees with 90 degrees as the base, and the evaluation score of the moiré pattern is above the target range (e.g., 4 points or more), moiré artifacts can be reduced to a level acceptable to the viewer.

[0057] FIG. 10 is a diagram showing a moire level according to a change in pixel size and shape of a display device having a viewing angle control film according to an embodiment.

[0058] 10, when the viewing angle control film according to an embodiment has a light blocking pattern specification A (thickness, thickness, inclination angle) in the target range, the moire level is evaluated and it can be seen that the difference in the moire level due to the change in pixel shape or size is negligible. Therefore, the design range of the viewing angle control film derived in an embodiment can be applied to all display panels having various pixel shapes and sizes.

[0059] On the other hand, in FIG. 10, when the viewing angle control film has specifications B and C (thickness, thickness, tilt angle) that are outside the target range, the moire level is noticeable, but it can be seen that the difference in the moire level noticed due to changes in pixel shape and size is negligible.

[0060] In the display device according to an embodiment, the viewing angle control film 200 can adjust the interval (W), thickness (d), height (H), etc. of the light blocking pattern 250 differently depending on the position on the display panel 100. As a result, the viewing angle control film 200 operated in the viewing angle control mode can improve the brightness (transmittance) of the display panel 100 provided to the first viewer in the passenger seat (first viewing position) and can effectively block light toward the driver (second viewer) in the driver's seat (second viewing position).

[0061] FIG. 11 is a diagram showing the application of different spacing between shading patterns of a viewing angle control film according to one embodiment, FIG. 12 is a diagram showing the application of different thicknesses between shading patterns of a viewing angle control film according to one embodiment, FIGS. 13A and 13B are diagrams showing the adjustment range of spacing between shading patterns in a viewing angle control film according to one embodiment, FIG. 14 is a diagram showing the application of different heights between shading patterns of a viewing angle control film according to one embodiment, FIG. 15 is a diagram showing the application of different spacing, thickness, and height between shading patterns of a viewing angle control film according to one embodiment, and FIGS. 16 and 17 are diagrams showing a method of compensating for brightness deviations due to different spacing between shading patterns of a viewing angle control film according to one embodiment.

[0062] Referring to FIG. 11, the viewing angle control film 200 according to an embodiment has a distance (W) between the light blocking patterns 250 for each position on the display panel 100 in consideration of the driver's position. S , W E ) can be set to different thicknesses (d SThe first interval (W) and the height (H) between the light blocking patterns 250 on the display panel 100 may be set to be the same as the first interval (W) between the light blocking patterns 250 on the display panel 100. S ) is set relatively small, and the second interval (W E ) is the first interval (W S ) can be set larger.

[0063] The distance between the light-shielding patterns 250 (W S , W E ) can be determined as shown in FIG. 11 and the following Equation 1:

[0064]

number

[0065] FIG. 11 and Equation 1 S is a first distance (W) between the light-shielding patterns 250 at a first position on the display panel 100 that is relatively close to the driver, i.e., at a first position on the display panel 100 that has a first horizontal distance (S) from the driver. S ) can mean. E is a second distance (W) between the light-shielding patterns 250 at a second position on the display panel 100 that is farther from the driver, i.e., at a second position on the display panel 100 that has a second horizontal distance (E) greater than the first horizontal distance (S) from the driver. E ) may mean the height of the light blocking pattern 250. θ S θ means the angle of light emitted to the driver from a first position of the display panel 100 relatively close to the driver, and can be determined by the arctangent function of the vertical distance (D) and the first horizontal distance (S) between the driver and the display panel 100. Emeans the angle of light emitted to the driver from a second position of the display panel 100 that is relatively far from the driver, and can be determined by the arctangent function of the vertical distance (D) and the second horizontal distance (E) between the driver and the display panel 100.

[0066] Referring to FIG. 11 and Equation 1, the first distance (W S ) is the light emission angle (θ S The second spacing (W) between the light blocking patterns 250 at a second position of the display panel 100 that is relatively far from the driver can be determined by the ratio of the height (H) of the light blocking patterns 250 to the tangent function of the light blocking pattern 250. E ) is the light emission angle (θ E ) to the tangent function of the light-shielding pattern 250.

[0067] Referring to FIG. 12, the viewing angle control film 200A according to an embodiment has a thickness (d S , d E ) and the distance between the light-shielding patterns 250A and 250B (W S , W E The first thickness (d ) of the first light blocking pattern 250A disposed at a first position on the display panel 100 close to the driver may be set to be different from the first thickness (d ) of the first light blocking pattern 250A. S ) is set relatively thick, and the first interval (W S ) may be set relatively narrow, and the second thickness (d E ) is the first thickness (d S ) between the second light blocking patterns 250B. E ) is the first interval (W S ) can be set thicker.

[0068] A first distance (W S ) and the second spacing (W E ) can be determined by the above-mentioned Equation 1. S The first light-shielding pattern 250A has a first thickness (d S ) and the second interval (W E The second thickness (d E ) can be determined as shown in FIG. 12 and Equation 2 below.

[0069]

number

[0070] In FIG. 12 and Equation 2, W may represent a constant distance (W) between the light blocking patterns 250A and 250B.

[0071] Referring to FIG. 12 and Equation 2, at the first position close to the driver, the first distance (W S The first light-shielding pattern 250A has a first thickness (d S ) is a constant interval (W) and a first interval (W S ) at a second position farther from the driver, E The second thickness (d E ) is a constant interval (W) and a second interval (W E ) can be determined by the difference

[0072] Referring to FIG. 13A, the distance between the light blocking patterns 250 (W S , W E ) can be set to increase as the horizontal distance (S, E) from the driver increases, but in order to limit it to a range of 33 to 39% of the pixel size to prevent moire, the spacing (W S , W EThe variable range of can be set to the threshold value (Th) if it exceeds the threshold value (Th).

[0073] Referring to FIG. 14, the viewing angle control film 200C according to an embodiment has heights (H S , H E The first height (H) of the first light blocking pattern 250C may be set to be different from the first height (H) of the first light blocking pattern 250C, and the distance (W) between the light blocking patterns 250C and 250D may be set to be the same. The thickness of the light blocking patterns 250C and 250D may be set to be the same. S The second height (H) of the second light blocking pattern 250D may be set relatively high, and the farther the position is from the driver, the lower the second height (H E ) is the first height (H S ) can be set lower.

[0074] The height (H S , H E ) can be determined as shown in FIG. 14 and Equation 3 below.

[0075]

number

[0076] In FIG. 14 and Equation 3, H S is a first height (H) of the first light-shielding pattern 250C at a first position on the display panel 100 that is relatively close to the driver, i.e., at a first position on the display panel 100 that has a first horizontal distance (S) from the driver. S ) can mean. H E is a second height (H) of the second light-shielding pattern 250D at a second position on the display panel 100 that is farther from the driver, i.e., at a second position on the display panel 100 that has a second horizontal distance (E) greater than the first horizontal distance (S) from the driver. E θS θ means the angle of light emitted to the driver at a first position of the display panel 100 relatively close to the driver, and can be determined by the arctangent function of the vertical distance (D) and the first horizontal distance (S) between the driver and the display panel 100. E means the angle of light emitted to the driver at a second position of the display panel 100 that is relatively far from the driver, and can be determined by the arctangent function of the vertical distance (D) and a second horizontal distance (E) between the driver and the display panel 100.

[0077] 14 and Equation 3, the first height (H S ) is the light emission angle (θ S The second height (H) between the second light blocking patterns 250D at a second position of the display panel 100 that is relatively far from the driver can be determined by multiplying the tangent function of the distance (W) between the first light blocking patterns 250C. E ) is the light emission angle (θ E ) by the distance (W) between the second light blocking patterns 250D.

[0078] Referring to FIG. 15, the viewing angle control film 200E according to an embodiment has a thickness (d S , d E ), the distance between the light-shielding patterns 250E and 250F (W S , W E ), the height of the shading patterns 250E and 250F (H S , H E ) can be set to be complex and different.

[0079] In FIG. 15, the thickness (d S , d E), the distance between the light-shielding patterns 250E and 250F (W S , W E ), the height of the shading patterns 250E and 250F (H S , H E ) can be determined by the above-described formulas 1 to 3.

[0080] In FIG. 15, the first thickness (d S ) and the first height (H S ) is set relatively high, while the first spacing (W S ) may be set relatively narrow, and the second thickness (d E ) and the second height (H E Each of the first thicknesses (d S ) and height (H S ) between the second light blocking patterns 250F, and the second interval (W E ) is the first interval (W S ) can be set wider.

[0081] In this way, the viewing angle control film according to one embodiment and the display device having the same can improve the transmittance through the viewing angle control film by applying differences in the thickness and spacing of the light-shielding patterns of the viewing angle control film depending on the position on the display panel taking into account the driver's position, thereby improving the brightness of the display device.

[0082] The viewing angle control film according to one embodiment and the display device having the same can reduce the manufacturing costs of the viewing angle control film by applying differences in the height of the light-shielding pattern of the viewing angle control film depending on the position on the display panel taking into account the driver's position.

[0083] 16 and 17, in the view angle control film according to an embodiment, the distance (W S, W E ) depending on the position, the distance (W) between the light blocking patterns 250 increases as the horizontal distance (S, E) from the driver increases. S , W E ) increases, the transmittance of light traveling in the front, that is, the luminance (F1), increases. S From L E Therefore, the display panel may have a luminance deviation, which is a deviation in transmittance depending on the position on the display panel.

[0084] Referring to FIG. 16, the difference interval (W S , W E The luminance (F1) by position due to the application of S ) and high brightness (L E ), the brightness deviation can be uniformly compensated for to improve image quality and the overall brightness of the display device can be improved.

[0085] Referring to FIG. 17, the difference interval (W S , W E The position-specific luminance (F1) achieved by applying E ) and low brightness (L S ), the luminance deviation can be uniformly compensated for to improve image quality and reduce power consumption of the display device.

[0086] The features, structures, effects, etc. described in the various examples of this specification are included in at least one example of this specification, and are not necessarily limited to only one example. Furthermore, the features, structures, effects, etc. exemplified in at least one example of this specification can be combined or modified in different examples by a person having ordinary skill in the art to which the technical ideas of this specification belong. Therefore, the contents related to these combinations and modifications must be interpreted as being included in the technical scope or scope of rights of this specification.

[0087] The present specification described above is not limited to the above-mentioned embodiments and the attached drawings, and it will be apparent to those skilled in the art to which the present specification pertains that multiple substitutions, modifications and changes are possible within the scope of the technical idea of ​​the present specification. Therefore, the scope of the present specification is indicated by the claims set forth below, and all modifications or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present specification. [Explanation of symbols]

[0088] 100: Panel 200: Viewing angle control film 300: Cover board 110: Display unit 120: Polarizing plate 130: Touch sensor 210: First substrate 220: Second board 230: Transparent insulating layer 250: Shading pattern 260:FPC 240:Display area 242: Bezel area

Claims

1. A display panel, and A viewing angle control film is disposed on the display panel, The viewing angle control film is a plurality of light-shielding patterns for blocking light traveling in a lateral direction other than a front direction of the display panel in a viewing angle control mode; The light blocking patterns are parallel to each other and arranged in a horizontal direction as follows: a thickness in the range of 8 to 25% of the horizontal width of a pixel of the display panel; Spacing between 33% and 39% of the horizontal width of said pixel and Each of the plurality of light-shielding patterns extends in a direction having an inclination angle in a range of 95 to 105 degrees or 75 to 85 degrees with respect to a horizontal direction, The viewing angle control film is a first substrate having a first transparent electrode disposed thereon; a second substrate having a second transparent electrode disposed thereon; a transparent insulating layer disposed between the first substrate and the second substrate and having grooves in which the light-shielding patterns are disposed; a light blocking height of each of the light blocking patterns is changed between the viewing angle control mode and the viewing angle non-control mode according to a driving voltage applied to the first transparent electrode and the second transparent electrode; In the viewing angle control mode, the viewing angle control film transmits light emitted from the display panel in a front direction, and light traveling in the left and right lateral directions is blocked by the light blocking pattern, In the viewing angle non-control mode, the viewing angle control film transmits light emitted from the display panel in a front direction and in left and right lateral directions; A display device in which at least one of the thickness, spacing, and height of the plurality of shading patterns is set to be different on the left and right sides when viewed horizontally, depending on the position on the display panel, taking into consideration the position of a viewer to which the viewing angle control mode is applied.

2. In the viewing angle control film, a second interval of a second light blocking pattern located at a second position farther from the viewer than a first interval of a first light blocking pattern located at a first position closer to the viewer is set wider than the first interval of a first light blocking pattern located at a first position closer to the viewer; the first light-shielding pattern and the second light-shielding pattern have the same thickness; The display device according to claim 1 , wherein the first light-shielding pattern and the second light-shielding pattern have the same height.

3. In the viewing angle control film, a second thickness of a second light-shielding pattern located at a second position farther from the viewer than a first thickness of a first light-shielding pattern located at a first position closer to the viewer; a second interval between the second light blocking patterns is set to be wider than a first interval between the first light blocking patterns; The display device according to claim 1 , wherein the first light-shielding pattern and the second light-shielding pattern have the same height.

4. In the viewing angle control film, a second height of a second light blocking pattern located at a second position farther from the viewer than a first height of a first light blocking pattern located at a first position closer to the viewer is set lower than the first height of the first light blocking pattern located at a first position closer to the viewer; the first light-shielding pattern and the second light-shielding pattern have the same thickness; The display device according to claim 1 , wherein the interval between the first light-shielding patterns is the same as the interval between the second light-shielding patterns.

5. In the viewing angle control film, a second thickness of a second light-shielding pattern located at a second position farther from the viewer than a first thickness of a first light-shielding pattern located at a first position closer to the viewer; a second interval between the second light blocking patterns is set to be wider than a first interval between the first light blocking patterns; The display device according to claim 1 , wherein a second height of the second light-shielding pattern is set lower than a first height of the first light-shielding pattern.

6. a first interval between the first light blocking patterns is set by applying a vertical distance between the viewer and the display panel, a first horizontal distance between the viewer and the first position of the display panel, and a height of the first light blocking patterns; A display device as described in any one of claims 2, 3 and 5, wherein a second interval between the second shading patterns is set by applying a vertical distance between the viewer and the display panel, a second horizontal distance between the viewer and the second position of the display panel, and a height of the second shading patterns.

7. A first thickness of the first light blocking pattern is set according to a first interval between the first light blocking patterns; The display device according to claim 3 or 5, wherein a second thickness of the second light-shielding pattern is set according to a second interval between the second light-shielding patterns.

8. a first height of the first light blocking pattern is set by applying a vertical distance between the viewer and the display panel, a first horizontal distance between the viewer and the first position of the display panel, and an interval between the first light blocking patterns; 6. The display device of claim 4, wherein the second height of the second shading pattern is set by applying a vertical distance between the viewer and the display panel, a second horizontal distance between the viewer and the second position of the display panel, and an interval between the second shading patterns.

9. The display device according to claim 1 , wherein in the viewing angle control film, the distance between the light blocking patterns gradually increases as the distance between the viewer and the light blocking patterns increases.

10. The display device according to claim 1 , wherein in the viewing angle control film, the distance between the light-shielding patterns gradually increases and the thickness of the light-shielding patterns gradually decreases as the distance between the viewer and the light-shielding patterns increases.

11. The display device according to claim 1 , wherein in the viewing angle control film, the height of the light blocking pattern gradually decreases as the distance between the viewer and the light blocking pattern increases.

12. The display device of claim 1 , wherein in the viewing angle control film, as the distance between the viewer and the light-shielding pattern increases, the thickness of the light-shielding pattern decreases, and the height of the light-shielding pattern decreases.

13. 13. A display device according to claim 9, 10 or 12, wherein the spacing between the shading patterns, which increases with the distance between the viewer and the shading patterns, is set within a threshold limiting the spacing to a range of 33-39% of the horizontal width of the pixel.

14. The display device of claim 1 , wherein a transmittance deviation of the viewing angle control film caused by a distance between the plurality of light blocking patterns that varies depending on a position of the display panel is compensated for by adjusting a brightness of the display panel.

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