Tiled display device

Abstract

A tile-type display device is provided. The tile-type display device includes a first and second display device comprising a display area including pixels and a non-display area surrounding the display area, a coupling area disposed between the first and second display devices, a viewing distance detection unit for detecting a user's viewing distance, and a brightness compensation unit for compensating the brightness of pixels adjacent to the coupling area based on the size of the coupling area and the viewing distance.

Description

Technology Field

[0001] The present invention relates to a tile-type display device. Background Technology

[0002] When manufacturing display devices in large sizes, the defect rate of light-emitting elements may increase due to the increase in the number of pixels, and productivity or reliability may decrease. To address this, a tile-type display can realize a large screen by connecting multiple display devices of relatively small size. A tile-type display may include boundary areas called seams between multiple display devices due to the non-display areas or bezel areas of each of the adjacent display devices. When a single image is displayed across the entire screen, these boundary areas create a sense of discontinuity, thereby reducing immersion in the image. The problem to be solved

[0003] The problem that the present invention aims to solve is to provide a tile-type display device that can prevent boundary parts or non-display areas between display devices from being perceived, eliminate the sense of disconnection between display devices, and enhance image immersion by compensating for the brightness of pixels adjacent to the combined area.

[0004] The problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0005] A tile-type display device according to one embodiment for solving the above problem includes a first and second display device including a display area including pixels and a non-display area surrounding the display area, a combined area disposed between the first and second display devices, a viewing distance detection unit for detecting a user's viewing distance, and a brightness compensation unit for compensating the brightness of pixels adjacent to the combined area based on the size of the combined area and the viewing distance.

[0006] The above-mentioned luminance compensation unit can calculate a visibility index based on the size of the combined area and the viewing distance, and determine a luminance compensation amount capable of optimizing the visibility index.

[0007] The above-described luminance compensation unit can calculate a visibility index that changes according to the viewing distance when the luminance compensation amount has a specific value, and determine the range of viewing distances where the visibility index satisfies a reference index.

[0008] The above-mentioned luminance compensation unit can determine the amount of luminance compensation according to the user's selection within the range of viewing distances where the above-mentioned visibility index satisfies the reference index.

[0009] The above-mentioned luminance compensation unit can increase the number of pixels compensating for the luminance as the amount of luminance compensation increases.

[0010] The size of the above-mentioned combined area can be determined by comparing the combined pitch between the pixel of the first display device and the pixel of the second display device and the pixel pitch between the pixels.

[0011] The above-described luminance compensation unit can increase the luminance compensation amount of pixels adjacent to the combination area as the combination pitch becomes larger than the pixel pitch, and decrease the luminance compensation amount as the combination pitch becomes smaller than the pixel pitch.

[0012] The above luminance compensation unit may not compensate pixels adjacent to the combination area when the combination pitch and the pixel pitch are the same.

[0013] The above viewing distance detection unit can detect the viewing distance by performing foveated rendering based on the user's location.

[0014] A tile-type display device according to one embodiment for solving the above problem comprises a first and second display device including a display area including pixels and a non-display area surrounding the display area, a combined area disposed between the first and second display devices, a viewing distance detection unit for detecting a user's viewing distance, an illuminance detection unit for detecting the illuminance of the combined area, and a luminance compensation unit for compensating the luminance of pixels adjacent to the combined area based on the size of the combined area, the viewing distance, and the illuminance.

[0015] The above-described luminance compensation unit can calculate a visibility index based on the size of the combined area, the viewing distance, and the illuminance, and determine a luminance compensation amount capable of optimizing the visibility index.

[0016] The above-described luminance compensation unit calculates a visibility index that changes according to the viewing distance when the luminance compensation amount and the illuminance have specific values, and can determine the range of viewing distances where the visibility index satisfies a reference index.

[0017] The above-mentioned luminance compensation unit can determine the amount of luminance compensation according to the user's selection within the range of viewing distances where the above-mentioned visibility index satisfies the reference index.

[0018] The above-mentioned luminance compensation unit can reduce the luminance compensation amount of pixels adjacent to the combination area as the illuminance increases.

[0019] The above-mentioned luminance compensation unit can compensate the luminance of pixels adjacent to the combination area based on the size of the combination area and the viewing distance when the illuminance is below a certain level.

[0020] The above-mentioned luminance compensation unit can increase the number of pixels compensating for the luminance as the amount of luminance compensation increases.

[0021] The size of the above-mentioned combined area can be determined by comparing the combined pitch between the pixel of the first display device and the pixel of the second display device and the pixel pitch between the pixels.

[0022] The above-described luminance compensation unit can increase the luminance compensation amount of pixels adjacent to the combination area as the combination pitch becomes larger than the pixel pitch, and decrease the luminance compensation amount as the combination pitch becomes smaller than the pixel pitch.

[0023] The above luminance compensation unit may not compensate pixels adjacent to the combination area when the combination pitch and the pixel pitch are the same.

[0024] The above viewing distance detection unit can detect the viewing distance by performing foveated rendering based on the user's location.

[0025] Specific details of other embodiments are included in the detailed description and drawings. Effects of the invention

[0026] According to the tile-type display device of the embodiments, by compensating the brightness of unit pixels adjacent to the combined area based on the size of the combined area, viewing distance, and illuminance, it is possible to prevent the user from perceiving the combined area between multiple display devices and improve the sense of disconnection between multiple display devices, thereby enhancing the immersion of the image.

[0027] The effects according to the embodiments are not limited to those exemplified above, and a wider variety of effects are included in this specification. Brief explanation of the drawing

[0028] FIG. 1 is a plan view showing a tile-type display device according to one embodiment. Figure 2 is an enlarged view of area A1 of Figure 1. FIG. 3 is a block diagram showing a display panel, a display driving unit, a viewing distance detection unit, and a brightness compensation unit of a tile-type display device according to one embodiment. FIG. 4 is a flowchart illustrating an example of a brightness compensation process for a tile-type display device according to one embodiment. FIG. 5 is a diagram showing another example of a brightness compensation process for a tile-type display device according to one embodiment. FIG. 6 is a block diagram showing a display panel, a display driving unit, a viewing distance detection unit, an illuminance detection unit, and a brightness compensation unit of a tile-type display device according to another embodiment. FIG. 7 is a flowchart illustrating an example of a brightness compensation process for a tile-type display device according to another embodiment. FIG. 8 is a diagram showing another example of a brightness compensation process for a tile-type display device according to another embodiment. FIG. 9 is a graph showing a visibility index according to the size of the combined area, the viewing distance, and the amount of brightness compensation in a tile-type display device according to one embodiment. FIG. 10 is a graph showing the range of viewing distances at a specific brightness compensation amount in a tile-type display device according to one embodiment. FIGS. 11 to 14 are graphs showing the brightness before brightness compensation and the compensated brightness according to the size of the combined area and the viewing distance in a tile-type display device according to one embodiment. Specific details for implementing the invention

[0029] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims.

[0030] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may also be the second component within the technical scope of the present invention.

[0031] The features of each of the various embodiments of the present invention may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship.

[0032] Specific embodiments will be described below with reference to the attached drawings.

[0033] FIG. 1 is a plan view showing a tile-type display device according to one embodiment, and FIG. 2 is an enlarged view of area A1 of FIG. 1.

[0034] Referring to FIGS. 1 and 2, a tile-type display device (TD) may include a plurality of display devices (10). The display devices (10) may be arranged in a grid pattern, but are not limited thereto. The display devices (10) may be connected in a first direction (X-axis direction) or a second direction (Y-axis direction), and the tile-type display device (TD) may have a specific shape. For example, each of the display devices (10) may have the same size as each other, but is not limited thereto. As another example, the display devices (10) may have different sizes.

[0035] The tile-type display device (TD) may include first to fourth display devices (10-1 to 10-4). The number and combination relationship of the display devices (10) are not limited to the embodiment of FIG. 1. The number of display devices (10) may be determined according to the size of each of the display device (10) and the tile-type display device (TD).

[0036] Each of the display devices (10) may have a rectangular shape including a long side and a short side. The display devices (10) may be arranged such that their long or short sides are connected to one another. Some of the display devices (10) may be placed at the edges of the tile display device (TD) to form one side of the tile display device (TD). Other parts of the display devices (10) may be placed at the corners of the tile display device (TD) to form two adjacent sides of the tile display device (TD). Still other parts of the display devices (10) may be placed inside the tile display device (TD) and surrounded by other display devices (10).

[0037] Each of the display devices (10) may include a display area (DA) and a non-display area (NDA). The display area (DA) may include a plurality of unit pixels (UP) to display an image. Each of the unit pixels (UP) may include first to third pixels (SP1, SP2, SP3). Each of the first to third pixels (SP1, SP2, SP3) may include an organic light-emitting diode (OLED) including an organic light-emitting layer, a quantum dot light-emitting diode (QDLED) including a quantum dot light-emitting layer, an inorganic light-emitting diode (LED) including an inorganic semiconductor, or a micro light-emitting diode (MicroLED). The non-display area (NDA) may be placed around the display area (DA) to surround the display area (DA) and may not display an image.

[0038] Unit pixels (UP) may be arranged along a plurality of rows and columns in a display area (DA). Each of the first to third pixels (SP1, SP2, SP3) may include a light-emitting region or an aperture region defined by a pixel defining film or bank, and may emit light having a predetermined peak wavelength through the light-emitting region or aperture region. The light-emitting region may be an area where light generated from a light-emitting element of the display device (10) is emitted to the outside of the display device (10). The first pixel (SP1) may emit light of a first color, the second pixel (SP2) may emit light of a second color, and the third pixel (SP3) may emit light of a third color. For example, the first color light may be red light having a peak wavelength in the range of 610 nm to 650 nm, the second color light may be green light having a peak wavelength in the range of 510 nm to 550 nm, and the third color light may be blue light having a peak wavelength in the range of 440 nm to 480 nm, but is not limited thereto.

[0039] The first to third pixels (SP1, SP2, SP3) may be sequentially and repeatedly arranged along the first direction (X-axis direction) of the display area (DA). For example, the area of ​​the light-emitting region of each of the first to third pixels (SP1, SP2, SP3) may be substantially the same. As another example, the area of ​​the light-emitting region of each of the first to third pixels (SP1, SP2, SP3) may be different from one another, but is not limited thereto.

[0040] The tile-type display device (TD) may have a planar shape overall, but is not limited thereto. The tile-type display device (TD) may have a three-dimensional shape to provide a sense of depth to the user. For example, if the tile-type display device (TD) has a three-dimensional shape, at least some of the display devices (10) may have a curved shape. As another example, the tile-type display device (TD) may have a three-dimensional shape by each of the display devices (10) having a planar shape and being connected to each other at a predetermined angle.

[0041] A tile-type display device (TD) may include a bonding area (SM) positioned between display areas (DA). The tile-type display device (TD) may be formed by connecting the non-display areas (NDA) of each adjacent display device (10). A plurality of display devices (10) may be connected to each other through a bonding member or an adhesive member positioned in the bonding area (SM). The bonding area (SM) of each display device (10) may not include a pad portion or a flexible film attached to the pad portion. The distance between the display areas (DA) of each display device (10) may be close enough that the bonding area (SM) between the plurality of display devices (10) is not perceived by the user. The size (BAS) of the bonding area (SM) may correspond to the difference between the bonding pitch (CP) and the pixel pitch (PP). For example, the coupling pitch (CP) may correspond to the pitch between a unit pixel (UP) placed to the right of the first display device (10-1) and a unit pixel (UP) placed to the left of the second display device (10-2), and the pixel pitch (PP) may correspond to the pitch between the unit pixels (UP) of the second display device (10-2). Accordingly, the tile-type display device (TD) can improve the sense of disconnection between the multiple display devices (10) and enhance the immersion of the image by preventing the coupling area (SM) between the multiple display devices (10) from being perceived by the user.

[0042] FIG. 3 is a block diagram showing a display panel, a display driving unit, a viewing distance detection unit, and a brightness compensation unit of a tile-type display device according to one embodiment.

[0043] Referring to FIG. 3, the tile-type display device (TD) may include a display panel (100), a display driving unit (200), a viewing distance detection unit (300), and a brightness compensation unit (500).

[0044] Each of the display devices (10) may include a display panel (100). The display panel (100) may include a display area (DA) and a non-display area (NDA). The display area (DA) may include a plurality of unit pixels (UP) to display an image. Each of the unit pixels (UP) may include first to third pixels (SP1, SP2, SP3). The non-display area (NDA) may be placed around the display area (DA) to surround the display area (DA) and may not display an image.

[0045] The display driving unit (200) can output a signal and a voltage for driving the first to third pixels (SP1, SP2, SP3). The display driving unit (200) can supply data voltages to the data lines of the display panel (100). The data voltage can be supplied to the first to third pixels (SP1, SP2, SP3) and can determine the brightness of the first to third pixels (SP1, SP2, SP3). The display driving unit (200) can supply a power voltage to the power lines of the display panel (100) and supply a gate control signal to the gate driving unit of the display panel (100). For example, the display driving unit (200) can be formed as an integrated circuit (IC) and mounted on a chip-on-film method or a tape carrier package method, but is not limited thereto.

[0046] The viewing distance detection unit (300) can detect the user's viewing distance (VD). The viewing distance detection unit (300) can detect the user's position by tracking the user's pupils, including an eye tracker. The viewing distance detection unit (300) can detect the viewing distance (VD) between the tile display device (TD) and the user by performing foveated rendering based on the user's position. The method of detecting the user's position and the method of detecting the viewing distance (VD) are not limited to the above description. The viewing distance detection unit (300) can supply the detected viewing distance (VD) to the brightness compensation unit (500).

[0047] The luminance compensation unit (500) can receive the size (BAS) of the combined area (SM) and the viewing distance (VD). The size (BAS) of the combined area (SM) can be calculated by comparing the combined pitch (CP) and the pixel pitch (PP) after the display devices (10) are combined. For example, the combined pitch (CP) may correspond to the pitch between the unit pixel (UP) placed to the right of the first display device (10-1) and the unit pixel (UP) placed to the left of the second display device (10-2), and the pixel pitch (PP) may correspond to the pitch between the unit pixels (UP) of the second display device (10-2). Therefore, as the combined pitch (CP) becomes larger than the pixel pitch (PP), the size (BAS) of the combined area (SM) may increase. The size (BAS) of the combined area (SM) can be measured after the display devices (10) are combined and stored in memory, and the brightness compensation unit (500) can receive the size (BAS) of the combined area (SM) during the brightness compensation process.

[0048] The luminance compensation unit (500) can increase the luminance compensation amount (LCA) of unit pixels (UP) adjacent to the combination area (SM) as the combination pitch (CP) becomes larger than the pixel pitch (PP), and decrease the luminance compensation amount (LCA) as the combination pitch (CP) becomes smaller than the pixel pitch (PP). The luminance compensation unit (500) may not compensate the unit pixels (UP) adjacent to the combination area (SM) when the combination pitch (CP) and the pixel pitch (PP) are the same. Therefore, the luminance compensation unit (500) can terminate the luminance compensation process when the combination pitch (CP) and the pixel pitch (PP) are the same.

[0049] The luminance compensation unit (500) can compensate the luminance of unit pixels (UP) adjacent to the combined area (SM) based on the size (BAS) and viewing distance (VD) of the combined area (SM). For example, the luminance compensation unit (500) can calculate a visibility index through the simulation of a Human Vision System (HVS) based on the size (BAS) and viewing distance (VD) of the combined area (SM). The Human Vision System (HVS) can express the degree to which the combined area (SM) is visible to the user through the visibility index according to the size (BAS) and viewing distance (VD) of the combined area (SM). The Human Vision System (HVS) can use a characteristic function of the user's eye or a characteristic function of a tiled display device (TD). Here, the Human Vision System (HVS) can use at least one of a phase transfer function, a modulation transfer function, a light transfer function, a line spread function, a pupil function, or a point spread function as a characteristic function. The unit of the visibility index can be JND (Just Noticeable Difference).

[0050] The luminance compensation unit (500) can calculate a visibility index based on the size (BAS) and viewing distance (VD) of the combined area (SM) and determine a luminance compensation amount (LCA) that can optimize the visibility index. The luminance compensation unit (500) can adjust the luminance around the combined area (SM) to the average luminance level of the display area (DA) by compensating the luminance of unit pixels (UP) adjacent to the combined area (SM). The luminance compensation unit (500) can reduce the visibility index by determining the optimal luminance compensation amount (LCA). The lower the visibility index, the more the combined area (SM) is prevented from being perceived by the user and the sense of disconnection between the display devices (10) is improved, thereby enhancing the immersion of the image. The luminance compensation amount (LCA) may correspond to a compensation value added to the existing data voltage to minimize the visibility index.

[0051] The luminance compensation unit (500) can compensate for the luminance of unit pixels (UP) placed in the column or row closest to the combined area (SM). Referring to FIG. 1, the luminance compensation unit (500) can compensate for the luminance of unit pixels (UP) placed in the far right column and the lowest row of the first display device (10-1). The luminance compensation unit (500) can compensate for the luminance of unit pixels (UP) placed in the far left column and the lowest row of the second display device (10-2). The luminance compensation unit (500) can compensate for the luminance of unit pixels (UP) placed in the far right column and the highest row of the third display device (10-3). The luminance compensation unit (500) can compensate for the luminance of unit pixels (UP) placed in the far left column and the highest row of the fourth display device (10-4). For example, the luminance compensation unit (500) can increase the number of unit pixels (UP) that compensate for luminance as the luminance compensation amount (LCA) increases. The luminance compensation unit (500) can compensate for the luminance of unit pixels (UP) placed in at least one column or at least one row adjacent to the combination area (SM).

[0052] The luminance compensation unit (500) can calculate a visibility index that changes according to the viewing distance (VD) when the luminance compensation amount (LCA) has a specific value, and can determine the range of the viewing distance (VD) where the visibility index satisfies the reference index. Here, the reference index can define the degree to which the combined area (SM) is not visible to the user. For example, when the luminance compensation amount (LCA) is 1%, it can calculate a visibility index that changes according to the size (BAS) of the combined area (SM) and the viewing distance (VD), and determine the range of the size (BAS) of the combined area (SM) or the viewing distance (VD) where the visibility index satisfies the reference index. The size (BAS) of the combined area (SM) can be measured after the tile-type display device (TD) is manufactured. Accordingly, the luminance compensation unit (500) can determine the luminance compensation amount (LCA) according to the user's selection within the range of viewing distance (VD) where the visibility index satisfies the reference index based on the size (BAS) of the measured combined area (SM).

[0053] The brightness compensation unit (500) can provide a determined brightness compensation amount (LCA) to the display driving unit (200). The display driving unit (200) can generate compensation data (DATA) that is added to the existing data voltage based on the brightness compensation amount (LCA). The display driving unit (200) can generate compensation data (DATA) by adjusting the existing data voltage by a ratio of the brightness compensation amount (LCA). The display driving unit (200) can supply the compensation data (DATA) to unit pixels (UP) adjacent to the combined area (SM) of the display panel (100).

[0054] FIG. 4 is a flowchart illustrating an example of a brightness compensation process for a tile-type display device according to one embodiment.

[0055] Referring to FIG. 4, the size (BAS) of the combined area (SM) can be calculated by comparing the combined pitch (CP) and the pixel pitch (PP) after the display devices (10) are combined (step S110). The size (BAS) of the combined area (SM) can be measured after the display devices (10) are combined and stored in memory.

[0056] The viewing distance detection unit (300) can detect the user's viewing distance (VD) (step S120). The viewing distance detection unit (300) can detect the user's position by tracking the user's pupils, including an eye tracker. The viewing distance detection unit (300) can detect the viewing distance (VD) between the tile display device (TD) and the user by performing foveated rendering based on the user's position.

[0057] The luminance compensation unit (500) can calculate a visibility index based on the size (BAS) of the combined area (SM) and the viewing distance (VD) (step S130). For example, the luminance compensation unit (500) can calculate a visibility index through the simulation of a Human Vision System (HVS) based on the size (BAS) of the combined area (SM) and the viewing distance (VD). The Human Vision System (HVS) can utilize a characteristic function of the user's eye or a characteristic function of a tiled display device (TD). Here, the Human Vision System (HVS) can utilize at least one of a phase transfer function, a modulation transfer function, a light transfer function, a line spread function, a pupil function, or a point spread function as a characteristic function.

[0058] The luminance compensation unit (500) can determine a luminance compensation amount (LCA) that can optimize the visibility index (step S140). The luminance compensation unit (500) can compensate the luminance of unit pixels (UP) placed in at least one column or at least one row adjacent to the combined area (SM). By compensating the luminance of the unit pixels (UP) adjacent to the combined area (SM), the luminance compensation unit (500) can adjust the luminance around the combined area (SM) to the average luminance level of the display area (DA).

[0059] The brightness compensation unit (500) can provide a determined brightness compensation amount (LCA) to the display driving unit (200). The display driving unit (200) can generate compensation data (DATA) that is added to the existing data voltage based on the brightness compensation amount (LCA) (step S150). The display driving unit (200) can supply the compensation data (DATA) to unit pixels (UP) adjacent to the combined area (SM) of the display panel (100).

[0060] FIG. 5 is a diagram showing another example of a brightness compensation process for a tile-type display device according to one embodiment.

[0061] Referring to FIG. 5, the size (BAS) of the combined area (SM) can be calculated by comparing the combined pitch (CP) and the pixel pitch (PP) after the display devices (10) are combined (step S210).

[0062] The luminance compensation unit (500) may not compensate unit pixels (UP) adjacent to the combination area (SM) when the combination pitch (CP) and the pixel pitch (PP) are the same (step S220). Accordingly, the luminance compensation unit (500) may terminate the luminance compensation process when the combination pitch (CP) and the pixel pitch (PP) are the same.

[0063] The luminance compensation unit (500) can increase the luminance compensation amount (LCA) of unit pixels (UP) adjacent to the combination area (SM) when the combination pitch (CP) exceeds the pixel pitch (PP) (step S230) (step S240).

[0064] The luminance compensation unit (500) can reduce the luminance compensation amount (LCA) when the combined pitch (CP) is less than the pixel pitch (PP) (step S250).

[0065] The viewing distance detection unit (300) can detect the user's viewing distance (VD) (step S260).

[0066] The luminance compensation unit (500) can determine an optimal luminance compensation amount (LCA) that reflects the viewing distance (VD) (step S270). The luminance compensation unit (500) can compensate the luminance of unit pixels (UP) placed in at least one column or at least one row adjacent to the combination area (SM). By compensating the luminance of the unit pixels (UP) adjacent to the combination area (SM), the luminance compensation unit (500) can adjust the luminance around the combination area (SM) to the average luminance level of the display area (DA). The luminance compensation unit (500) can provide the determined luminance compensation amount (LCA) to the display driving unit (200). The display driving unit (200) can generate compensation data (DATA) that is added to the existing data voltage based on the luminance compensation amount (LCA).

[0067] FIG. 6 is a block diagram showing a display panel, a display driving unit, a viewing distance detection unit, an illuminance detection unit, and a brightness compensation unit of a tile-type display device according to another embodiment.

[0068] Referring to FIG. 6, the tile-type display device (TD) may include a display panel (100), a display driving unit (200), a viewing distance detection unit (300), an illuminance detection unit (400), and a brightness compensation unit (500).

[0069] Each of the display devices (10) may include a display panel (100). The display panel (100) may include a display area (DA) and a non-display area (NDA). The display area (DA) may include a plurality of unit pixels (UP) to display an image. Each of the unit pixels (UP) may include first to third pixels (SP1, SP2, SP3). The non-display area (NDA) may be placed around the display area (DA) to surround the display area (DA) and may not display an image.

[0070] The display driving unit (200) can output a signal and a voltage for driving the first to third pixels (SP1, SP2, SP3). The display driving unit (200) can supply data voltages to the data lines of the display panel (100). The data voltage can be supplied to the first to third pixels (SP1, SP2, SP3) and can determine the brightness of the first to third pixels (SP1, SP2, SP3). The display driving unit (200) can supply a power voltage to the power lines of the display panel (100) and supply a gate control signal to the gate driving unit of the display panel (100). For example, the display driving unit (200) can be formed as an integrated circuit (IC) and mounted on a chip-on-film method or a tape carrier package method, but is not limited thereto.

[0071] The viewing distance detection unit (300) can detect the user's viewing distance (VD). The viewing distance detection unit (300) can detect the user's position by tracking the user's pupils, including an eye tracker. The viewing distance detection unit (300) can detect the viewing distance (VD) between the tile display device (TD) and the user by performing foveated rendering based on the user's position. The method of detecting the user's position and the method of detecting the viewing distance (VD) are not limited to the above description. The viewing distance detection unit (300) can supply the detected viewing distance (VD) to the brightness compensation unit (500).

[0072] The illuminance detection unit (400) can detect illuminance (IL) around the tile-type display device (TD). The illuminance detection unit (400) includes at least one illuminance sensor and can detect illuminance (IL) for the display area (DA) and the combined area (SM) of the tile-type display device (TD). When the illuminance (IL) is high, the reflectance of the combined area (SM) may increase, and when the illuminance (IL) is low, the reflectance of the combined area (SM) may decrease. The illuminance detection unit (400) can supply the detected illuminance (IL) to the brightness compensation unit (500).

[0073] The luminance compensation unit (500) can receive the size (BAS) of the combined area (SM), the viewing distance (VD), and the illuminance (IL). The size (BAS) of the combined area (SM) can be calculated by comparing the combined pitch (CP) and the pixel pitch (PP) after the display devices (10) are combined. For example, the combined pitch (CP) may correspond to the pitch between the unit pixel (UP) placed to the right of the first display device (10-1) and the unit pixel (UP) placed to the left of the second display device (10-2), and the pixel pitch (PP) may correspond to the pitch between the unit pixels (UP) of the second display device (10-2). Therefore, as the combined pitch (CP) becomes larger than the pixel pitch (PP), the size (BAS) of the combined area (SM) may increase. The size (BAS) of the combined area (SM) can be measured after the display devices (10) are combined and stored in memory, and the brightness compensation unit (500) can receive the size (BAS) of the combined area (SM) during the brightness compensation process.

[0074] The luminance compensation unit (500) can increase the luminance compensation amount (LCA) of unit pixels (UP) adjacent to the combination area (SM) as the combination pitch (CP) becomes larger than the pixel pitch (PP), and decrease the luminance compensation amount (LCA) as the combination pitch (CP) becomes smaller than the pixel pitch (PP). The luminance compensation unit (500) may not compensate the unit pixels (UP) adjacent to the combination area (SM) when the combination pitch (CP) and the pixel pitch (PP) are the same. Therefore, the luminance compensation unit (500) can terminate the luminance compensation process when the combination pitch (CP) and the pixel pitch (PP) are the same.

[0075] The luminance compensation unit (500) can reduce the luminance compensation amount (LCA) of unit pixels (UP) adjacent to the combination area (SM) as the illuminance (IL) increases. When the illuminance (IL) is high, the reflectance of the combination area (SM) may increase. The reflectance of the combination area (SM) may have the same effect as the luminance compensation amount (LCA) of the unit pixels (UP). Therefore, the luminance compensation unit (500) can reduce the luminance compensation amount (LCA) of unit pixels (UP) adjacent to the combination area (SM) as the reflectance of the combination area (SM) increases.

[0076] The luminance compensation unit (500) can compensate the luminance of unit pixels (UP) adjacent to the combined area (SM) based on the size (BAS) of the combined area (SM), the viewing distance (VD), and the illuminance (IL). For example, the luminance compensation unit (500) can calculate a visibility index through the simulation of a Human Vision System (HVS) based on the size (BAS) of the combined area (SM), the viewing distance (VD), and the illuminance (IL). The Human Vision System (HVS) can express the degree to which the combined area (SM) is visible to the user through the visibility index according to the size (BAS) of the combined area (SM), the viewing distance (VD), and the illuminance (IL). The Human Vision System (HVS) can use a characteristic function of the user's eye or a characteristic function of the tiled display device (TD). Here, the human visual system (HVS) may use at least one of a phase transfer function, a modulation transfer function, an optical transfer function, a line spread function, a pupil function, or a point spread function as a characteristic function. The unit of the visibility index may be the Just Noticeable Difference (JND).

[0077] As another example, the luminance compensation unit (500) can compensate the luminance of unit pixels (UP) adjacent to the combined area (SM) based on the size (BAS) and viewing distance (VD) of the combined area (SM) when the illuminance (IL) is below a certain level. The luminance compensation unit (500) can recognize the reflectance of the combined area (SM) as 0 when the illuminance (IL) is below a certain level. Accordingly, when the illuminance (IL) is below a certain level, the luminance compensation unit (500) can exclude the condition of illuminance (IL) and determine the luminance compensation amount (LCA) based on the size (BAS) and viewing distance (VD) of the combined area (SM).

[0078] The luminance compensation unit (500) can calculate a visibility index based on the size (BAS) of the combined area (SM), the viewing distance (VD), and the illuminance (IL), and determine a luminance compensation amount (LCA) that can optimize the visibility index. The luminance compensation unit (500) can adjust the luminance around the combined area (SM) to the average luminance level of the display area (DA) by compensating the luminance of the unit pixels (UP) adjacent to the combined area (SM). The luminance compensation unit (500) can reduce the visibility index by determining the optimal luminance compensation amount (LCA). The lower the visibility index, the more the combined area (SM) is prevented from being perceived by the user and the sense of disconnection between the display devices (10) is improved, thereby enhancing the immersion of the image. The luminance compensation amount (LCA) may correspond to a compensation value added to the existing data voltage to minimize the visibility index.

[0079] The luminance compensation unit (500) can compensate for the luminance of unit pixels (UP) placed in the column or row closest to the combined area (SM). Referring to FIG. 1, the luminance compensation unit (500) can compensate for the luminance of unit pixels (UP) placed in the far right column and the lowest row of the first display device (10-1). The luminance compensation unit (500) can compensate for the luminance of unit pixels (UP) placed in the far left column and the lowest row of the second display device (10-2). The luminance compensation unit (500) can compensate for the luminance of unit pixels (UP) placed in the far right column and the highest row of the third display device (10-3). The luminance compensation unit (500) can compensate for the luminance of unit pixels (UP) placed in the far left column and the highest row of the fourth display device (10-4). For example, the luminance compensation unit (500) can increase the number of unit pixels (UP) that compensate for luminance as the luminance compensation amount (LCA) increases. The luminance compensation unit (500) can compensate for the luminance of unit pixels (UP) placed in at least one column or at least one row adjacent to the combination area (SM).

[0080] The luminance compensation unit (500) can calculate a visibility index that changes according to the viewing distance (VD) when the luminance compensation amount (LCA) has a specific value, and can determine the range of the viewing distance (VD) where the visibility index satisfies the reference index. Here, the reference index can define the degree to which the combined area (SM) is not visible to the user. For example, when the luminance compensation amount (LCA) is 1%, it can calculate a visibility index that changes according to the size (BAS) of the combined area (SM), the viewing distance (VD), and the illuminance (IL), and can determine the range of the size (BAS), viewing distance (VD), or illuminance (IL) where the visibility index satisfies the reference index. The size (BAS) of the combined area (SM) can be measured after the tile-type display device (TD) is manufactured. The size of the illuminance (IL) can be measured in real time or at a specific time. Accordingly, the luminance compensation unit (500) can determine the luminance compensation amount (LCA) according to the user's selection within the range of viewing distance (VD) where the visibility index satisfies the reference index, based on the size (BAS) and illuminance (IL) of the measured combined area (SM).

[0081] The brightness compensation unit (500) can provide a determined brightness compensation amount (LCA) to the display driving unit (200). The display driving unit (200) can generate compensation data (DATA) that is added to the existing data voltage based on the brightness compensation amount (LCA). The display driving unit (200) can generate compensation data (DATA) by adjusting the existing data voltage by a ratio of the brightness compensation amount (LCA). The display driving unit (200) can supply the compensation data (DATA) to unit pixels (UP) adjacent to the combined area (SM) of the display panel (100).

[0082] FIG. 7 is a flowchart illustrating an example of a brightness compensation process for a tile-type display device according to another embodiment.

[0083] Referring to FIG. 7, the size (BAS) of the combined area (SM) can be calculated by comparing the combined pitch (CP) and the pixel pitch (PP) after the display devices (10) are combined (step S310). The size (BAS) of the combined area (SM) can be measured after the display devices (10) are combined and stored in memory.

[0084] The viewing distance detection unit (300) can detect the user's viewing distance (VD) (step S320). The viewing distance detection unit (300) can detect the user's position by tracking the user's pupils, including an eye tracker. The viewing distance detection unit (300) can detect the viewing distance (VD) between the tile display device (TD) and the user by performing foveated rendering based on the user's position.

[0085] The illuminance detection unit (400) can detect illuminance (IL) around the tile-type display device (TD) (step S330). The illuminance detection unit (400) includes at least one illuminance sensor and can detect illuminance (IL) for the display area (DA) and the combined area (SM) of the tile-type display device (TD).

[0086] The luminance compensation unit (500) can calculate a visibility index based on the size (BAS) of the combined area (SM), the viewing distance (VD), and the illuminance (IL) (step S340). For example, the luminance compensation unit (500) can calculate a visibility index through the simulation of a Human Vision System (HVS) based on the size (BAS) of the combined area (SM), the viewing distance (VD), and the illuminance (IL). The Human Vision System (HVS) can utilize a characteristic function of the user's eye or a characteristic function of the tiled display device (TD). Here, the Human Vision System (HVS) can utilize at least one of a phase transfer function, a modulation transfer function, a light transfer function, a line spread function, a pupil function, or a point spread function as a characteristic function.

[0087] The luminance compensation unit (500) can determine a luminance compensation amount (LCA) that can optimize the visibility index (step S350). The luminance compensation unit (500) can compensate the luminance of unit pixels (UP) placed in at least one column or at least one row adjacent to the combined area (SM). By compensating the luminance of the unit pixels (UP) adjacent to the combined area (SM), the luminance compensation unit (500) can adjust the luminance around the combined area (SM) to the average luminance level of the display area (DA).

[0088] The brightness compensation unit (500) can provide a determined brightness compensation amount (LCA) to the display driving unit (200). The display driving unit (200) can generate compensation data (DATA) that is added to the existing data voltage based on the brightness compensation amount (LCA) (step S360). The display driving unit (200) can supply the compensation data (DATA) to unit pixels (UP) adjacent to the combined area (SM) of the display panel (100).

[0089] FIG. 8 is a diagram showing another example of a brightness compensation process for a tile-type display device according to another embodiment.

[0090] Referring to FIG. 8, the size (BAS) of the combined area (SM) can be calculated by comparing the combined pitch (CP) and the pixel pitch (PP) after the display devices (10) are combined (step S410).

[0091] The luminance compensation unit (500) may not compensate unit pixels (UP) adjacent to the combination area (SM) when the combination pitch (CP) and the pixel pitch (PP) are the same (step S420). Accordingly, the luminance compensation unit (500) may terminate the luminance compensation process when the combination pitch (CP) and the pixel pitch (PP) are the same.

[0092] The luminance compensation unit (500) can increase the luminance compensation amount (LCA) of unit pixels (UP) adjacent to the combination area (SM) when the combination pitch (CP) exceeds the pixel pitch (PP) (step S430) (step S440).

[0093] The luminance compensation unit (500) can reduce the luminance compensation amount (LCA) when the combined pitch (CP) is less than the pixel pitch (PP) (step S450).

[0094] The viewing distance detection unit (300) can detect the user's viewing distance (VD), and the illuminance detection unit (400) can detect the illuminance (IL) around the tile-type display device (TD) (step S460).

[0095] The luminance compensation unit (500) can determine an optimal luminance compensation amount (LCA) that reflects the viewing distance (VD) and illuminance (IL) (step S470). The luminance compensation unit (500) can compensate the luminance of unit pixels (UP) placed in at least one column or at least one row adjacent to the combination area (SM). By compensating the luminance of the unit pixels (UP) adjacent to the combination area (SM), the luminance compensation unit (500) can adjust the luminance around the combination area (SM) to the average luminance level of the display area (DA). The luminance compensation unit (500) can provide the determined luminance compensation amount (LCA) to the display driving unit (200). The display driving unit (200) can generate compensation data (DATA) that is added to the existing data voltage based on the luminance compensation amount (LCA).

[0096] FIG. 9 is a graph showing a visibility index according to the size of the bonding area, the viewing distance, and the luminance compensation amount in a tile-type display device according to one embodiment. FIG. 9 shows the visibility index (R-index) when the size (BAS) of the bonding area (SM) is 30 to 100 [㎛], the viewing distance (VD) is 1 or 4.47 [m], and the luminance compensation amount (LCA) is 1 to 1.1.

[0097] Referring to FIG. 9, the luminance compensation unit (500) can calculate a visibility index (R-index) through the simulation of a Human Vision System (HVS) based on the size (BAS) of the combined area (SM) and the viewing distance (VD).

[0098] For example, the luminance compensation unit (500) can calculate a visibility index (R-index) as shown in Table 1 below through the simulation of a Human Vision System (HVS).

[0099] Size of the binding region (SM) (BAS) [㎛] 30 40 50 60 70 80 90 100 Luminance Compensation (LCA) 1 6.3 7.2 8.0 8.7 9.4 10.0 10.5 11.0 1.01 5.7 6.7 7.6 8.3 9.0 9.6 10.2 10.8 1.02 5.1 6.1 7.1 7.9 8.6 9.3 9.9 10.5 1.03 4.7 5.7 6.7 7.5 8.2 8.9 9.6 10.2 1.04 4.5 5.5 6.3 7.2 7.9 8.6 9.2 9.8 1.05 4.3 5.3 6.1 6.9 7.7 8.3 9.0 9.6 1.06 4.9 5.1 6.0 6.7 7.5 8.1 8.8 9.4 1.07 5.6 5.1 5.8 6.6 7.3 8.0 8.6 9.2 1.08 6.1 5.7 5.7 6.5 7.2 7.9 8.5 9.1 1.09 6.7 6.2 5.8 6.4 7.1 7.8 8.4 9.0 1.1 7.2 6.8 6.4 6.3 7.0 7.7 8.3 8.9

[0100] In Table 1, the viewing distance between the tiled display device (TD) and the user may be 1 [m]. The luminance compensation amount (LCA) may correspond to a compensation value added to the existing data voltage to minimize the visibility index (R-index). For example, if the luminance compensation amount (LCA) is 1.01, 1% of the data voltage may be added to the existing data voltage, and if the luminance compensation amount (LCA) is 1.1, 10% of the data voltage may be added to the existing data voltage. The unit of the visibility index (R-index) may be JND (Just Noticeable Difference). The luminance compensation unit (500) can reduce the visibility index by determining the optimal luminance compensation amount (LCA). The lower the visibility index, the more the combined area (SM) is prevented from being perceived by the user and the sense of disconnection between the display devices (10) can be improved, thereby enhancing the immersion of the image.

[0101] FIG. 10 is a graph showing a range of viewing distances at a specific luminance compensation amount in a tile-type display device according to one embodiment. FIG. 10 shows a visibility index (R-index) when the size (BAS) of the combined area (SM) is 30 or 60 [㎛], the viewing distance (VD) is 1 to 4.47 [m], and the luminance compensation amount (LCA) is 1 to 1.1.

[0102] Referring to FIG. 10, the luminance compensation unit (500) can calculate a visibility index (R-index) that changes according to the viewing distance (VD) when the luminance compensation amount (LCA) has a specific value, and can determine the range of viewing distances (VD) where the visibility index (R-index) satisfies a reference index. The reference index can define the degree to which the combined area (SM) is not visible to the user. For example, the reference index may be 3 [JND]. Accordingly, the luminance compensation unit (500) can calculate a visibility index (R-index) that changes according to the viewing distance (VD) when the luminance compensation amount (LCA) has a specific value, and can determine the range of viewing distances (VD) where the visibility index (R-index) is 3 [JND] or less.

[0103] For example, when the luminance compensation amount (LCA) is 1.02, the size of the combined area (SM) (BAS) is 30 [㎛], and the viewing distance (VD) is 1 to 4.47 [m], the visibility index (R-index) may have a value of approximately 1.3 to 5. When the luminance compensation amount (LCA) is 1.04, the size of the combined area (SM) (BAS) is 30 [㎛], and the viewing distance (VD) is 1 to 4.47 [m], the visibility index (R-index) may have a value of approximately 2 to 4.5. When the luminance compensation amount (LCA) is 1.05, the size of the combined area (SM) (BAS) is 60 [㎛], and the viewing distance (VD) is 1 to 4.47 [m], the visibility index (R-index) may have a value of approximately 1 to 7. In this way, the luminance compensation unit (500) can determine the range of the viewing distance (VD) in which the visibility index (R-index) is 3 [JND] or less. Accordingly, the luminance compensation unit (500) can determine the luminance compensation amount (LCA) and the size (BAS) of the combined area (SM) according to the user's selection within the range of the viewing distance (VD) in which the visibility index (R-index) satisfies the reference index.

[0104] FIGS. 11 to 14 are graphs showing the brightness before brightness compensation and the compensated brightness according to the size of the combined area and the viewing distance in a tile-type display device according to one embodiment.

[0105] Referring to FIGS. 11 to 14, a tile-type display device (TD) may include a plurality of display devices (10) and a combined area (SM). Referring to FIG. 1, the tile-type display device (TD) may include first to fourth display devices (10-1 to 10-4) and a combined area (SM). Each display area (DA) of the first to fourth display devices (10-1 to 10-4) may have a brightness according to the data voltage, but the combined area (SM) may have a lower brightness than the display area (DA) because it does not include a unit pixel (UP).

[0106] In FIG. 11, the size (BAS) of the combined area (SM) of the tile-type display device (TD) may be 30 [㎛], and the viewing distance (VD) may be 1 [m]. In this case, the difference in brightness between the display area (DA) and the combined area (SM) may be about 40 or more. Accordingly, the brightness compensation unit (500) can adjust the brightness around the combined area (SM) to the average brightness level of the display area (DA) by compensating the brightness of the unit pixels (UP) adjacent to the combined area (SM).

[0107] In FIG. 12, the size (BAS) of the combined area (SM) of the tile-type display device (TD) may be 30 [㎛], and the viewing distance (VD) may be 4.47 [m]. In this case, the difference in luminance between the display area (DA) and the combined area (SM) may be about 20 or less. Therefore, as the viewing distance (VD) of FIG. 12 increases compared to the viewing distance (VD) of FIG. 11, the difference in luminance between the display area (DA) and the combined area (SM) in FIG. 12 may be relatively smaller than the difference in luminance between the display area (DA) and the combined area (SM) in FIG. 11. Accordingly, the luminance compensation amount (LCA) of the tile-type display device (TD) in FIG. 12 may be relatively smaller than the luminance compensation amount (LCA) of the tile-type display device (TD) in FIG. 11.

[0108] In FIG. 13, the size (BAS) of the combined area (SM) of the tile-type display device (TD) may be 80 [㎛], and the viewing distance (VD) may be 1 [m]. In this case, the difference in luminance between the display area (DA) and the combined area (SM) may be about 100 or more. Therefore, as the size of the combined area (SM) in FIG. 13 increases compared to the size (BAS) of the combined area (SM) in FIG. 11, the difference in luminance between the display area (DA) and the combined area (SM) in FIG. 13 may be relatively larger than the difference in luminance between the display area (DA) and the combined area (SM) in FIG. 11. Accordingly, the luminance compensation amount (LCA) of the tile-type display device (TD) in FIG. 13 may be relatively larger than the luminance compensation amount (LCA) of the tile-type display device (TD) in FIG. 11.

[0109] In FIG. 14, the size (BAS) of the combined area (SM) of the tile-type display device (TD) may be 80 [㎛], and the viewing distance (VD) may be 4.47 [m]. In this case, the difference in luminance between the display area (DA) and the combined area (SM) may be about 20 or less. Therefore, as the viewing distance (VD) of FIG. 14 increases compared to the viewing distance (VD) of FIG. 13, the difference in luminance between the display area (DA) and the combined area (SM) in FIG. 14 may be relatively smaller than the difference in luminance between the display area (DA) and the combined area (SM) in FIG. 13. Accordingly, the luminance compensation amount (LCA) of the tile-type display device (TD) in FIG. 14 may be relatively smaller than the luminance compensation amount (LCA) of the tile-type display device (TD) in FIG. 13.

[0110] Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention may be implemented in other specific forms without changing the technical concept or essential features thereof. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. Explanation of the symbols

[0111] TD: Tile display device 10: Display device SM: Connection Area 100: Display Panel 200: Display driving unit 300: Viewing distance detection unit 400: Illuminance detection unit 500: Luminance compensation unit CP: Combined pitch PP: Pixel pitch BAS: Size of the connection area VD: Viewing distance IL: Illuminance LCA: Luminance compensation amount DATA: Reward data

Claims

Claim 1 A tile-type display device comprising: a first and second display device including a display area including pixels and a non-display area surrounding the display area; a coupling area disposed between the first and second display devices; a viewing distance detection unit for detecting a user's viewing distance; and a luminance compensation unit for compensating the luminance of pixels adjacent to the coupling area based on the size of the coupling area and the viewing distance, wherein the luminance compensation unit calculates a visibility index that changes according to the viewing distance when the luminance compensation amount has a specific value, determines a range of viewing distances where the visibility index satisfies a reference index, and the luminance compensation unit determines the luminance compensation amount according to the user's selection within the range of viewing distances where the visibility index satisfies the reference index. Claim 2 A tile-type display device according to claim 1, wherein the luminance compensation unit calculates a visibility index based on the size of the combined area and the viewing distance, and determines a luminance compensation amount capable of optimizing the visibility index. Claim 3 A tile-type display device according to claim 1, wherein the luminance compensation unit calculates a visibility index that changes according to the viewing distance when the luminance compensation amount has a specific value, and determines a range of viewing distances in which the visibility index satisfies a reference index. Claim 4 In claim 3, the luminance compensation unit is a tile-type display device that determines the amount of luminance compensation according to the user's selection within a viewing distance range in which the visibility index satisfies the reference index. Claim 5 In claim 1, the luminance compensation unit is a tile-type display device that increases the number of pixels compensating for the luminance as the amount of luminance compensation increases. Claim 6 A tile-type display device according to claim 1, wherein the size of the combined area is determined by comparing the combined pitch between the pixel of the first display device and the pixel of the second display device and the pixel pitch between the pixels. Claim 7 A tile-type display device according to claim 6, wherein the luminance compensation unit increases the luminance compensation amount of pixels adjacent to the combination area as the combination pitch becomes larger than the pixel pitch, and decreases the luminance compensation amount as the combination pitch becomes smaller than the pixel pitch. Claim 8 In claim 6, the luminance compensation unit is a tile-type display device that does not compensate pixels adjacent to the combination area when the combination pitch and the pixel pitch are the same. Claim 9 In claim 1, the viewing distance detection unit is a tile-type display device that detects the viewing distance by performing foveated rendering based on the user's location. Claim 10 A tile-type display device comprising: a first and second display device including a display area including pixels and a non-display area surrounding the display area; a coupling area disposed between the first and second display devices; a viewing distance detection unit for detecting a user's viewing distance; an illuminance detection unit for detecting the illuminance of the coupling area; and a luminance compensation unit for compensating the luminance of pixels adjacent to the coupling area based on the size of the coupling area, the viewing distance, and the illuminance, wherein the size of the coupling area is determined by comparing the coupling pitch between a pixel of the first display device and a pixel of the second display device and the pixel pitch between the pixels, and the luminance compensation unit increases the amount of luminance compensation for pixels adjacent to the coupling area as the coupling pitch becomes larger than the pixel pitch, and decreases the amount of luminance compensation as the coupling pitch becomes smaller than the pixel pitch, and the luminance compensation unit does not compensate for pixels adjacent to the coupling area when the coupling pitch and the pixel pitch are the same. Claim 11 A tile-type display device according to claim 10, wherein the luminance compensation unit calculates a visibility index based on the size of the combined area, the viewing distance, and the illuminance, and determines a luminance compensation amount capable of optimizing the visibility index. Claim 12 A tile-type display device according to claim 10, wherein the luminance compensation unit calculates a visibility index that changes according to the viewing distance when the luminance compensation amount and the illuminance have a specific value, and determines the range of viewing distances in which the visibility index satisfies a reference index. Claim 13 In claim 12, the luminance compensation unit is a tile-type display device that determines the amount of luminance compensation according to the user's selection within a viewing distance range in which the visibility index satisfies the reference index. Claim 14 In claim 10, the luminance compensation unit is a tile-type display device that reduces the luminance compensation amount of pixels adjacent to the combination area as the illuminance increases. Claim 15 In claim 10, the luminance compensation unit is a tile-type display device that compensates the luminance of pixels adjacent to the combined area based on the size of the combined area and the viewing distance when the illuminance is below a certain level. Claim 16 delete Claim 17 delete Claim 18 delete Claim 19 In claim 10, the luminance compensation unit is a tile-type display device that does not compensate pixels adjacent to the combination area when the combination pitch and the pixel pitch are the same. Claim 20 In claim 10, the viewing distance detection unit is a tile-type display device that detects the viewing distance by performing foveated rendering based on the user's location.

Images