Light emitting device and image display device

Abstract

Provided is a light emitting device in which the joint between panels is made less visible without unduly compromising practicality. The light emitting device comprises an array of a plurality of unit panels each having a surface region divided into a plurality of pixels. Each of the plurality of unit panels includes a first pixel which is at least one of the pixels among the plurality of pixels that are adjacent to an outer periphery of the unit panel, and a second pixel which is at least one pixel other than the first pixel. The number of light sources provided for the first pixel is greater than the number of light sources provided for the second pixel.

Description

[Technical field]

[0001] The present disclosure relates to a light-emitting device and an image display device. [Background technology]

[0002] In a tiling display, a screen is constructed by arranging unit panels vertically and horizontally and connecting them together (Patent Document 1). In a tiling display, the surface area of ​​the unit panel is generally divided into a number of pixels at equal pitches, and each of the pixels is generally provided with an equal number of light sources. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-075825 A Summary of the Invention

[0004] In a tiling display, due to the luminance variation of the light source and the installation accuracy when arranging the unit panels, the boundary formed between adjacent unit panels may be visually recognized by the viewer as a seam between the panels. To address this problem, it is possible to make the seam less noticeable by locally increasing or decreasing the luminance of the light source close to the boundary or by improving the installation accuracy of the unit panels. However, this method has the disadvantage that the luminance of the entire display needs to be adjusted to the minimum luminance of the light source to be adjusted, which reduces the luminance of the entire display. Therefore, in actual operation, the installation accuracy of the unit panels is increased as much as possible while the luminance adjustment is kept to a minimum. However, improving the installation accuracy has practical problems such as requiring special tools or mechanisms such as jigs to achieve this and taking a long time to arrange the unit panels.

[0005] An object of the present disclosure is to provide a light-emitting device and an image display device that can make the seams between panels less noticeable without excessively impairing practicality.

[0006] A light emitting device according to an embodiment of the present disclosure is configured by arranging a plurality of unit panels, each of which has a surface region divided into a plurality of pixels, and each of the plurality of unit panels includes a first pixel, which is at least one of the pixels adjacent to the outer periphery of the unit panel, and a second pixel, which is at least one pixel other than the first pixel. In this embodiment, the number of light sources provided in the first pixel is greater than the number of light sources provided in the second pixel.

[0007] An image display device according to another embodiment of the present disclosure includes a display unit configured by arranging a plurality of unit panels, each of which has a surface area divided into a plurality of pixels, and a control unit configured to drive each of the plurality of unit panels based on image data. In the display unit, each of the plurality of unit panels includes a first pixel which is at least one of the plurality of pixels adjacent to the outer periphery of the unit panel, and a second pixel which is at least one pixel other than the first pixel, the second pixel having light sources of a plurality of colors, and the first pixel having light sources of a plurality of colors and an additional light source, and thus having a larger number of light sources than the second pixel. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing an overall configuration of an image display device according to a first embodiment of the present disclosure. [Diagram 2] FIG. 2 is an explanatory diagram that illustrates a schematic arrangement of unit panels in the image display device according to the above embodiment. [Diagram 3] FIG. 3 is an explanatory diagram that illustrates a schematic arrangement of light sources for each unit panel in the image display device according to the above embodiment. [Figure 4] FIG. 4 is an explanatory diagram that illustrates another example (first modified example) of the arrangement of light sources for each unit panel in the image display device according to the above embodiment. [Diagram 5]FIG. 5 is an explanatory diagram illustrating a still further example (second modified example) of the arrangement of light sources for each unit panel in the image display device according to the above embodiment. [Figure 6] FIG. 6 is an explanatory diagram that illustrates still another example (third modified example) of the arrangement of light sources for each unit panel in the image display device according to the above embodiment. [Figure 7] FIG. 7 is an explanatory diagram that illustrates a schematic arrangement of light sources for each unit panel in an image display device according to a second embodiment of the present disclosure. [Figure 8] FIG. 8 is an explanatory diagram that illustrates a schematic arrangement of light sources for each unit panel in an image display device according to a third embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The embodiments described below are specific examples of the present disclosure, and the technology according to the present disclosure is not limited to the specific aspects below. The same applies to the arrangement, dimensions, and dimensional ratios between the components according to the present disclosure, and are not limited to the examples shown in the drawings.

[0010] The explanation will be given in the following order. 1. First embodiment 1.1. Overall configuration of image display device 1.2. Configuration of the display unit of the image display device 1.2.1. Unit Panel Arrangement 1.2.2. Arrangement of light sources on unit panel (Pattern 1) 1.3.Effects 1.4. Description of Modifications 1.4.1. First modified example (Pattern 2) 1.4.2. Second modification (Pattern 3) 1.4.3. Third modification (Pattern 4) 2. Second embodiment 3. Third embodiment 4. Summary

[0011] <1. First embodiment> [1.1. Overall configuration of image display device] FIG. 1 is a schematic diagram showing an overall configuration of an image display device 101 according to a first embodiment of the present disclosure.

[0012] The image display device 101 includes a display unit 111 and a control unit 121 .

[0013] The display unit 111 is the "display unit" of the image display device according to this embodiment, and also constitutes a "light-emitting device." The display unit 111 is configured by arranging a plurality of unit panels U in a first direction (e.g., up-down or vertical direction) and a second direction (e.g., left-right or horizontal direction) and connecting them together, and the plurality of unit panels U can form a single screen S as a whole. As will be described later, the surface area of ​​each of the unit panels U is divided into a plurality of pixels, and each pixel is provided with a light source.

[0014] The control unit 121 is the "control unit" of the image display device according to this embodiment, and acquires image data and generates control signals for driving the display unit 111 based on the image data. The control unit 121 can be configured by a microcomputer equipped with a central processing unit (CPU) having a processor, various memories such as ROM and RAM, an input / output interface, etc. A computer program is stored in advance in the control unit 121, which operates according to the program to generate control signals for the display unit 111. In this embodiment, the control unit 121 is capable of driving each of the unit panels U provided in the display unit 111 on a pixel-by-pixel basis.

[0015] The control unit 121 is connected to an external device 201 and is capable of acquiring image data from the external device 201. Examples of the applicable external device 201 include imaging devices such as a personal computer and a video camera. The image data can be acquired not only by the external device 201, but also through a storage medium or a network line connected to the control unit 121.

[0016] [1.2. Configuration of the display unit of the image display device] (1.2.1. Unit Panel Arrangement) FIG. 2 is an explanatory diagram that illustrates a schematic arrangement of unit panels U in the image display device 101 (display unit 111) according to this embodiment.

[0017] The unit panels U are arranged vertically and horizontally, and collectively form one screen S. For convenience, Fig. 2 shows only four unit panels U1, U2, U3, and U4, two arranged vertically and two arranged horizontally, out of the multiple unit panels U that form the entire screen S. The number of unit panels U arranged to form one screen S can be appropriately selected depending on the purpose of the display.

[0018] Each of the unit panels U has a surface area divided into a plurality of pixels 1, and each pixel 1 is provided with a light source 2. In this embodiment, the surface area of ​​the unit panels U is divided into a plurality of pixels 1 arranged in the same direction as the unit panels U are arranged, that is, in the vertical and horizontal directions, and each pixel 1 is provided with a light source 2 (2R, 2G, 2B). In this embodiment, as the light source 2 provided for each pixel 1, light sources of multiple colors for color display are provided, specifically, a first light source 2R capable of emitting red light, a second light source 2G capable of emitting green light, and a third light source 2B capable of emitting blue light. These three color light sources 2R, 2G, 2B can be formed as light emitting diode (LED) light sources and integrated into one light emitting element E. In other words, in this embodiment, one light emitting element E is configured including light sources 2R, 2G, 2B of multiple colors (basically three colors), and one light emitting element E is provided for each pixel 1. The multiple colors for color display are not limited to the above three colors.

[0019] In this embodiment, in order to make the boundary between adjacent unit panels U, that is, the seams (hereinafter simply referred to as "seams") J1 and J2 between the panels U, U visually less noticeable to the viewer, the pixels 1 for each unit panel U are distinguished into a first pixel 1a, which is at least one of the pixels adjacent to the periphery of the unit panel U, and a second pixel 1b, which is at least one pixel other than the first pixel 1a. The number of light sources 2 provided for each pixel 1 is made different between the first pixel 1a and the second pixel 1b. Specifically, the first pixel 1a is a pixel adjacent to the periphery of the unit panel U, while the second pixel 1b is a pixel other than the first pixel 1a, particularly a pixel closer to the center of the unit panel U than the first pixel 1a, and the number of light sources 2 provided for the first pixel 1a is made greater than the number of light sources 2 provided for the second pixel 1b.

[0020] In this embodiment, as described above, the second pixel 1b includes three light sources 2R, 2G, and 2B of red, green, and blue colors, one each. These three light sources 2R, 2G, and 2B are integrated to form a This constitutes one light-emitting element E. The light sources 2R, 2G, and 2B provided in the second pixel 1b are light sources that are normally provided for color display.

[0021] In contrast, the first pixel 1a further includes a set of light sources 2R, 2G, 2B of the same colors (i.e., three colors) in addition to the three color light sources 2R, 2G, 2B provided in the second pixel 1b, and these three colors, a total of six light sources 2R, 2G, 2B, are integrated to form one light-emitting element E. The three color light sources 2R, 2G, 2B additionally provided in the first pixel 1a are light sources provided for the purpose of correction (i.e., brightness adjustment) to make the joints J1 and J2 less noticeable.

[0022] In this embodiment, in the unit panel U, a plurality of pixels 1 including a first pixel 1a and a second pixel 1b are arranged at a predetermined first pitch Pv (=Pv1) in the vertical direction (vertically on the paper surface of FIG. 2) and at a predetermined second pitch Ph (=Ph1) in the horizontal direction (horizontally on the paper surface of FIG. 2). Here, the first pitch Pv and the second pitch Ph may be equal in value. That is, as follows. Pv1=Ph1

[0023] Furthermore, in this embodiment, in the unit panel U, the light-emitting element E is disposed at the center of each pixel 1 (1a, 1b). Therefore, the pitch of the light-emitting elements E arranged in the unit panel U is equal to the pitch of the pixels 1, and is a first pitch Pv (=Pv1) in the vertical direction and a second pitch Ph (=Ph1) in the horizontal direction. In other words, regardless of whether it is the first pixel 1a or the second pixel 1b, the multiple light sources 2R, 2G, and 2B constituting one light-emitting element E are contained in the area of ​​one pixel 1. It is preferable that the light-emitting element E is configured to occupy an area of ​​half or less of the surface area of ​​each pixel 1, and the additional light source 2 can be connected in series or in parallel to the normal light source 2 intended for color display.

[0024] Furthermore, in one unit panel U, an interval Ii is formed between the light-emitting elements E provided for each of the adjacent pixels 1 above and below and left and right, and between the light-emitting elements E provided for each of the adjacent pixels 1 across the joints J1 and J2 between the adjacent unit panels U and U, an interval Ie is formed. Here, it is preferable that the following relationship holds between the first pitch Pv (=Pv1) and the second pitch Ph (=Ph1) of the light-emitting elements E provided for one unit panel U, and the first pitch Pv (=Pv2) and the second pitch Ph (=Ph2) of the light-emitting elements E provided for different unit panels U and U adjacent across the joints J1 and J2. However, the relationship between the first pitches Pv1 and Pv2 and the relationship between the second pitches Ph1 and Ph2 depend on the installation accuracy when arranging the unit panels U, and their relative magnitudes change according to the installation accuracy. For example, the first pitch Pv2 of the light-emitting elements E provided for different unit panels U and U may be larger than the first pitch Pv1 of the light-emitting elements E provided for one unit panel U. In this case, the interval Ie formed between the adjacent unit panels U and U can be wider than the interval Ii in one unit panel U (Ii < Ie). Conversely, the former first pitch Pv2 may be smaller than the latter first pitch Pv1. In this case, the interval Ie can be narrower than the interval Ii (Ii > Ie). It is also possible to make the intervals Ii and Ie closer to each other through improving the installation accuracy or the like. Pv1 = Pv2 Ph1 = Ph2

[0025] (1.2.2. Arrangement of light sources in unit panel) FIG. 3 is an explanatory diagram schematically showing the arrangement (pattern 1) of the light sources 2 for each unit panel U in the image display device 101 according to the present embodiment.

[0026] In the example shown in Fig. 3 and the modified examples shown in Figs. 4 to 6, the surface area of ​​the unit panel U is divided into a total of 16 (=4 x 4) pixels 1 for convenience, and these multiple pixels 1 include a first pixel 1a which is a pixel adjacent to the outer periphery of the unit panel U, and a second pixel 1b which is a pixel other than the first pixel 1a. The second pixel 1b has one each of three color light sources 2R, 2G, and 2B for color display, and these three colors and three light sources 2R, 2G, and 2B are integrated to form one light-emitting element E, while the first pixel 1a further has a set of light sources 2R, 2G, and 2B of the same color (i.e., three colors) in addition to the three colors of the light sources 2R, 2G, and 2B provided in the second pixel 1b, and these three colors and six light sources 2R, 2G, and 2B are integrated to form one light-emitting element E. The examples shown in FIGS. 3 to 6 have the above points in common, but differ from each other in the arrangement of the first pixels 1a and the second pixels 1b.

[0027] In this embodiment, as shown in Fig. 3, the first pixels 1a are all pixels adjacent to the periphery of the unit panel U, in other words, when the unit panel U has a rectangular periphery, the first pixels 1a are all pixels located on each of the four sides. The second pixels 1b are pixels closer to the center of the unit panel U than the first pixels 1a, and in the example shown in Fig. 3, they are four pixels closer to the center of the unit panel U and are surrounded by the first pixels 1a.

[0028] [1.3. Action and Effect] In a so-called tiling display, which is configured by arranging a plurality of unit panels, the boundary formed between adjacent unit panels may be visually recognized by the viewer as a seam between the panels due to the variation in the brightness of the light source and the installation accuracy when arranging the unit panels. To address this problem, it is possible to make the seam less noticeable by locally increasing or decreasing the brightness of the light source close to the boundary or improving the installation accuracy of the unit panels. However, in this case, it is necessary to adjust the brightness of the entire display to the minimum brightness of the light source to be adjusted, which is accompanied by the disadvantage that the brightness of the entire display decreases. Therefore, in actual operation, the installation accuracy of the unit tiles is increased as much as possible while the brightness adjustment is kept to a minimum, but improving the installation accuracy requires special tools or mechanisms such as jigs to achieve this, which leads to practical problems such as increased costs and a long time required for the work of arranging the unit panels.

[0029] In contrast, according to the present embodiment, the first pixel 1a, which is at least one of the pixels adjacent to the outer periphery of the unit panel U, is provided with a different number of light sources 2 from the other second pixel 1b, and a larger number of light sources 2 than the second pixel 1b are provided, thereby making it possible to widen the adjustment tolerance range of the luminance variation at the boundary of the unit panel U, that is, at the joints J1 and J2 between the panels U and U. In other words, it is possible to adjust the luminance at the joints J1 and J2 by ​​the light source 2 of the first pixel 1a, particularly the additional light source 2 provided in the first pixel 1a, while suppressing the decrease in luminance in the entire screen S. As a result, it is possible to make the joints J1 and J2 visually inconspicuous even with a relatively low installation accuracy without excessively relying on improving the installation accuracy of the unit panel U, and it is possible to make the joints J1 and J2 inconspicuous without impairing practicality. The adjustment by the additional light source 2 can be performed according to the expansion of the width of the joints J1 and j2. For example, if the width of the seams J1, J2 increases and the interval Ie increases, the brightness of the light source 2 of the first pixel 1a is increased, and if the width of the seams J1, J2 decreases and the interval Ie decreases, the brightness of the light source 2 of the first pixel 1a is decreased.

[0030] Furthermore, by keeping the pitches Pv and Ph at which the pixels 1 are arranged constant regardless of whether they are the first pixel 1a or the second pixel 1b, it is possible to suppress the complication of wiring that would otherwise be caused by the addition of the light source 2 to the first pixel 1a, and to display an image that does not look unnatural.

[0031] Furthermore, by configuring all pixels 1 adjacent to the outer periphery of the unit panel U as the first pixels 1a, the amount of luminance adjustment at the joints J1, J2 can be increased, making it possible to accommodate large-scale luminance adjustment.

[0032] The arrangement of the light sources 2 according to this embodiment is suitable for application to a unit panel U in which other unit panels U are arranged above, below, left and right.

[0033] [1.4. Description of Modifications] (1.4.1. First Modification) FIG. 4 is an explanatory diagram that illustrates another example (pattern 2) of the arrangement of the light sources 2 for each unit panel U in the image display device 101 according to this embodiment.

[0034] In the first modified example, the first pixels 1a are pixels located on only one of a pair of opposing sides of the unit panel U. For example, when the unit panel U is rectangular, the first pixels 1a are all pixels located on two sides that share one corner among the four sides, and in the example shown in Fig. 4, the first pixels 1a are seven pixels located on each of the left side and the bottom side. On the other hand, the second pixels 1b are all nine pixels other than the first pixel 1a.

[0035] In this way, by making the first pixel 1a a pixel located on only one of a pair of opposing sides of the unit panel U, it is possible to moderately limit the number of pixels provided as the first pixel 1a, and to obtain a moderate effect while suppressing the increase in costs that would otherwise accompany an increase in the number of additional light sources 2.

[0036] The arrangement of the light sources 2 according to this embodiment is suitable for application to unit panels U located at the four corners or corner portions of the screen S.

[0037] (1.4.2. Second Modification) FIG. 5 is an explanatory diagram that illustrates still another example (pattern 3) of the arrangement of the light sources 2 for each unit panel U in the image display device 101 according to this embodiment.

[0038] In the second modified example, the first pixels 1a are pixels located on a pair of opposing sides of the unit panel U, and the first pixel 1a located on one of the pair of sides is shifted from the first pixel 1a located on the other side in a direction parallel to the pair of sides. For example, in the example of FIG. 5 in which the unit panel U is rectangular, the first pixels 1a are located on a pair of opposing upper and lower sides and a pair of opposing left and right sides of the four sides. In the former pair, the first pixel 1a located on the upper side and the first pixel 1a located on the lower side are shifted from each other in a left-right direction parallel to the pair of sides, and in the latter pair, the first pixel 1a located on the left side and the first pixel 1a located on the right side are shifted from each other in a vertical direction parallel to the pair of sides.

[0039] In the second modified example, in the second pixel 1b, pixels adjacent to the outer periphery of the unit panel U and pixels closer to the center of the unit panel U are mixed.

[0040] Furthermore, in the second modified example, when a plurality of unit panels U are arranged to form a screen S, the first pixels 1a between two adjacent sides of adjacent unit panels U, U, sandwiching seams J1, J2, are in a complementary relationship with each other, in other words, the first pixels 1a are shifted from each other in a direction parallel to each of these two sides. For example, in the example of Fig. 5 where the unit panels U are rectangular, the first pixel 1a located on the right side of one unit panel U, among the adjacent unit panels U, is shifted from the first pixel 1a located on the left side of the other unit panel U in a vertical direction parallel to each of these two sides.

[0041] In this way, the first pixels 1a are pixels located on each of a pair of opposing sides of the unit panel U, and the first pixel 1a provided on one of the pair of sides is shifted in a direction parallel to the pair of sides relative to the first pixel 1a provided on the other side. This makes it possible to moderately limit the number of pixels provided as first pixels 1a and to obtain a moderate effect around the entire circumference of the unit panel U while suppressing the increase in costs that would otherwise accompany an increase in the number of additional light sources 2.

[0042] Furthermore, between two adjacent sides of adjacent unit panels U, U, the first pixels 1a are shifted in a direction parallel to each of these two sides to create a complementary relationship. This makes it possible to place additional light sources 2 on both sides of the seams J1, J2, specifically, on both the left and right sides of the seam J1 extending in the vertical direction and on both the top and bottom sides of the seam J2 extending in the horizontal direction, and to uniformly illuminate the seams J1, J2, making them less noticeable.

[0043] The arrangement of the light sources 2 according to this embodiment is suitable for application to a unit panel U in which other unit panels U are arranged above, below, left and right.

[0044] (1.4.3. Third Modification) FIG. 6 is an explanatory diagram that illustrates still another example (pattern 4) of the arrangement of the light sources 2 for each unit panel U in the image display device 101 according to this embodiment.

[0045] In the third modified example, the first pixels 1a are pixels located on a diagonal line on the outer periphery of the unit panel U. For example, when the unit panel U is rectangular, the first pixels 1a are pixels located on the diagonal line of the rectangle, that is, at the four corners, and in the example shown in Fig. 6, the first pixels 1a are four pixels located at each of the four corners.

[0046] In this way, by making the first pixel 1a a pixel located diagonally on the outer periphery of the unit panel U, it is possible to locally adjust the brightness at the intersection C of the seams J1 and J2, which is one of the locations where the effects of brightness variations are most noticeable, and therefore it is possible to mitigate the brightness variations while minimizing the number of additional light sources 2, and to make the seams J1 and J2 less noticeable, especially around the intersection C. In Figure 6, the intersection C is emphasized by a thick two-dot chain line.

[0047] The arrangement of the light sources 2 according to this embodiment is suitable for application to a unit panel U that has other unit panels U sharing the intersection C of the joints J1 and J2, for example, a unit panel U that has other unit panels U lined up above, below, to the left, and to the right.

[0048] <2. Second embodiment> In the above description, in the first pixel 1a, in addition to the three color light sources 2R, 2G, and 2B for color display provided in the second pixel 1b, a set of light sources 2R, 2G, and 2B of the same colors (i.e., three colors) is further provided, and these three colors, a total of six light sources 2R, 2G, and 2B are integrated to form one light-emitting element E. However, the number and colors of the additional light sources 2 provided in the first pixel 1a are not limited to this and can be selected appropriately. For example, it is possible to adopt light sources of one or two colors among the three colors for color display as the additional light source 2, and it is also possible to add not only one but two or more light sources 2 of each color. It is also possible to configure the additional light source 2 provided in the first pixel 1a as a light-emitting element separate from the one for color display.

[0049] As an example of such a case, FIG. 7 diagrammatically illustrates an arrangement of the light sources 2 for each unit panel U in an image display device 101 according to a second embodiment of the present disclosure.

[0050] An image display device 101 according to this embodiment has the same configuration as that shown in FIG. 1, and similarly to the first embodiment, a single screen S is formed by arranging and connecting a plurality of unit panels U to each other.

[0051] Each of the unit panels U has a surface area divided into a plurality of pixels 1 at a predetermined pitch (a first pitch Pv in the vertical direction and a second pitch Ph in the horizontal direction), and in each of the pixels 1, a first light-emitting element E1 in which a plurality of light sources 2 for color display, specifically light sources 2R, 2G, and 2B capable of emitting red, green, and blue light, respectively, are integrated is disposed at the center of the pixel 1. Here, the first light-emitting elements E1 are arranged at the first pitch Pv in the vertical direction and at the second pitch Ph in the horizontal direction in the unit panel U, and are provided for each pixel 1. The first pitch Pv and the second pitch Ph may be equal values. The light sources 2 (2R, 2G, 2B) provided in the first light-emitting element E1 correspond to the "first light source" according to this embodiment.

[0052] In this embodiment, in addition to the first light emitting element E1, an additional light source 2' is provided in at least one of the pixels adjacent to the periphery of the unit panel U, that is, the first pixel 1a. This additional light source 2' is provided for the purpose of making the joints J1 and j2 less noticeable, and corresponds to the "second light source" in this embodiment. In the example shown in FIG. 7, the unit panel U is rectangular, and the first pixels 1a are all the pixels located on the right side among the pixels adjacent to the periphery of the unit panel U.

[0053] As described above, the additional light source 2' can be incorporated into the first light-emitting element E1 and configured integrally with the light sources 2R, 2G, and 2B, but in this embodiment, it is configured as a second light-emitting element E2 separate from the first light-emitting element E1. Furthermore, it is possible to adopt a light source of any one or two of the three colors for color display as the additional light source 2', and in this embodiment, a green light source is adopted. As a result, in appearance, in the unit panel U, the first light-emitting element E1 in which multiple light sources 2 (2R, 2G, 2B) for color display are integrated is arranged at a predetermined pitch Pv, Ph, and one or more correction light sources 2' are positioned along the outer periphery of the unit panel U at a distance from this predetermined pitch.

[0054] As already mentioned, the area occupied by the first light-emitting element E1 and the second light-emitting element E2 is less than half the area of ​​the surface area of ​​the first pixel 1a, and the first light-emitting element E1 and the second light-emitting element E2 are contained within the area of ​​the first pixel 1a.

[0055] <3. Third embodiment> In the above description, in each of the first and second pixels 1a and 1b, the multiple light sources 2R, 2G, and 2B are arranged in a direction parallel to the surface area of ​​the unit panel U, in other words, in the planar directions X and Y of the pixels 1a and 1b. However, the direction in which the light sources are arranged is not limited to this, and it is also possible to arrange the light sources in a direction perpendicular to the surface area of ​​the unit panel U, for example. In other words, the multiple light sources 2R, 2G, and 2B are arranged overlapping each other in the direction Z perpendicular to the planar directions X and Y of the pixels 1a and 1b.

[0056] As an example of such a case, FIG. 8 diagrammatically illustrates an arrangement of the light sources 2 for each unit panel U in an image display device 101 according to a third embodiment of the present disclosure.

[0057] In this embodiment, the light sources 2R, 2G, and 2B are arranged in a direction Z perpendicular to the planar directions X and Y of the pixels 1a and 1b in the first pixel 1a, which is a pixel adjacent to the periphery of the unit panel U, and the second pixel 1b, which is a pixel other than the first pixel 1a, so as to be overlapped. The second pixel 1b includes a plurality of (for example, three colors) light sources 2R, 2G, and 2B for color display, and these three colors and three light sources are grouped together to form one light-emitting element E. On the other hand, the first pixel 1a further includes a set of light sources 2R, 2G, and 2B of the same color as the set of light sources 2R, 2G, and 2B included in the second pixel 1b, and these three colors and six light sources are grouped together to form one light-emitting element E. The additional light source is not limited to this, and may be a light source of any one or two colors of the three colors for color display, or a light source of another color. The arrangement of the first pixels 1a and the second pixels 1b in the unit panel U may be the same as the examples shown in FIGS. 3 to 6, or the example shown in FIG. 7, or may be another arrangement.

[0058] As in the first embodiment, a single screen S is formed by arranging and connecting multiple unit panels U together, and further, the area occupied by the light-emitting element E is less than half the area of ​​the surface area of ​​the pixels 1a, 1b, and the light-emitting element E is contained within the areas of the first and second pixels 1a, 1b.

[0059] As a modified example of the arrangement of the light sources according to this embodiment, it is also possible to arrange the normal light sources 2R, 2G, 2B for color display in the direction along the X, Y plane of the pixels 1a, 1b, while arranging the additional light sources 2R, 2G, 2B for correction in the direction perpendicular to the X, Y plane of the pixels 1a, 1b.

[0060] The above description does not specifically mention the sizes of the normal light source for color display and the additional light source for correction. The light source for correction may be a light source of a different size from the light source for color display, and may be a light source smaller than the light source for color display.

[0061] <4. Summary> The embodiment of the present disclosure has been described above in detail with reference to the drawings. According to the embodiment of the present disclosure, it is possible to ensure practicality while improving functionality by making the seams J1 and J2 less noticeable.

[0062] The technology of the present disclosure is not limited to the above specific embodiments, and various modifications are possible, and combinations of the modifications are also possible.

[0063] Furthermore, not all of the configurations and operations described in each embodiment are necessarily essential to the configurations and operations of the present disclosure. For example, among the components in each embodiment, components that are not described in an independent claim showing the highest concept of the present disclosure should be understood as optional components.

[0064] Terms used throughout this specification and the appended claims should be interpreted as "open-ended" terms. For example, the terms "including" or "including" should be interpreted as "limited to the aspects described as including" and the term "having" should be interpreted as "limited to the aspects described as having."

[0065] The terms used in this specification are merely used for convenience of description and are not intended to limit the configuration and operation. For example, terms such as "right", "left", "upper" and "lower" merely indicate directions on the drawings to be referred to. Furthermore, terms such as "inner" and "outer" indicate directions toward and away from the center of the focused element, respectively. The same applies to terms similar to or having the same meaning as these terms.

[0066] The technology of the present disclosure may have the following configuration. According to the technology of the present disclosure having the following configuration, it is possible to ensure practicality while improving functionality by making the seams J1 and J2 less noticeable. The effect achieved by the technology of the present disclosure is not necessarily limited to this, and may be any of the effects described in this specification. (1) A surface area is divided into a plurality of pixels, and the surface area is configured by arranging a plurality of unit panels, Each of the unit panels includes a first pixel which is at least one of the plurality of pixels adjacent to the outer periphery of the unit panel, and a second pixel which is at least one pixel other than the first pixel, and the number of light sources provided in the first pixel is greater than the number of light sources provided in the second pixel. (2) In the light emitting device according to (1) above, the second pixel is a pixel closer to a center of the unit panel than the first pixel. (3) The light-emitting device according to (1) or (2) above, wherein the pixels are arranged at a predetermined first pitch in a first direction of the surface area and at a predetermined second pitch in a second direction perpendicular to the first direction. (4) The first pixels are all pixels adjacent to the outer periphery of the unit panel, and are any one of the light emitting devices described in (1) to (3). (5) The light emitting device according to any one of (1) to (3) above, wherein the first pixel is a pixel located on only one of a pair of opposing sides of the unit panel. (6) The light-emitting device is any one of (1) to (3) above, wherein the first pixels are pixels located on each of a pair of opposing sides of the unit panel, and the first pixel provided on one of the pair of sides is shifted relative to the first pixel provided on the other side in a direction parallel to each of the pair of sides. (7) The light-emitting device of (6) above, wherein, between two adjacent sides of the unit panels that are separated by a boundary between the unit panels, the first pixels are shifted from each other in a direction parallel to each of the two sides. (8) The first pixel is a pixel located diagonally on the outer periphery of the unit panel, and is the light emitting device according to any one of (1) to (3) above. (9) The light emitting device according to any one of (1) to (8) above, wherein the light source is a light emitting diode light source. (10) An image display device comprising a display unit having any one of the light-emitting devices described in (1) to (9), wherein the unit panels each include light sources of multiple colors for the first pixel and the second pixel, and the first pixel includes an additional light source; and a control unit configured to drive each of the multiple unit panels based on image data. (11) The image display device according to (10), wherein the first pixel has a light source of at least one of the plurality of colors as the additional light source. (12) The image display device according to (10) or (11) above, wherein the control unit is configured to be able to drive the light source for each pixel. (13) A light emitting device comprising a plurality of unit panels arranged side by side, each of which has a surface area divided into a plurality of pixels, each of which is arranged at a predetermined pitch and includes a first light source provided for each of the pixels, and a second light source provided in at least one of the pixels that is adjacent to the outer periphery of the unit panel.

[0067] This application claims priority based on Japanese Patent Application No. 2020-106461, filed on June 19, 2020 in the Japan Patent Office, the entire contents of which are incorporated herein by reference.

[0068] Those skilled in the art will recognize that various modifications, combinations, subcombinations, and variations may occur to those skilled in the art depending on design requirements and other factors, and that such modifications are within the scope of the appended claims and their equivalents.

Claims

1. The display device is configured by arranging a plurality of unit panels, each of which has a surface area divided into a plurality of pixels; Each of the plurality of unit panels is a first pixel which is at least one of the pixels adjacent to an outer periphery of the unit panel; a second pixel which is at least one pixel other than the first pixel; Equipped with Each of the first pixel and the second pixel has a first light source of a first color; The number of the first light sources provided in the first pixel is greater than the number of the first light sources provided in the second pixel. Light emitting device.

2. the second pixel is closer to a center of the unit panel than the first pixel; The light emitting device according to claim 1 .

3. the pixels are arranged at a predetermined first pitch in a first direction of the surface region, and are arranged at a predetermined second pitch in a second direction perpendicular to the first direction; The light emitting device according to claim 1 .

4. The first pixels are all pixels adjacent to the outer periphery of the unit panel. The light emitting device according to claim 1 .

5. The first pixel is a pixel located on only one of a pair of opposing sides of the unit panel. The light emitting device according to claim 1 .

6. the first pixels are pixels located on each of a pair of opposing sides of the unit panel, and the first pixel provided on one of the pair of sides is shifted from the first pixel provided on the other side in a direction parallel to the pair of sides, The light emitting device according to claim 1 .

7. between two sides of adjacent unit panels sandwiching a boundary between the unit panels, the first pixels are shifted from each other in a direction parallel to each of the two sides, The light emitting device according to claim 6.

8. The first pixel is a pixel located on a diagonal line of an outer periphery of the unit panel. The light emitting device according to claim 1 .

9. The first light source is a light emitting diode light source. The light emitting device according to claim 1 .

10. Each of the first pixel and the second pixel further has a second light source of a second color different from the first color; The number of the second light sources provided in the first pixel is greater than the number of the second light sources provided in the second pixel. The light emitting device according to claim 1 .

11. A light-emitting device comprising a plurality of unit panels arranged in a row, each unit panel having a surface area divided into a plurality of pixels; a control unit configured to drive each of the plurality of unit panels based on image data; Equipped with Each of the plurality of unit panels is a first pixel which is at least one of the pixels adjacent to an outer periphery of the unit panel; a second pixel which is at least one pixel other than the first pixel; Equipped with Each of the first pixel and the second pixel has a first light source of a first color; The number of the first light sources provided in the first pixel is greater than the number of the first light sources provided in the second pixel. Image display device.

12. Each of the first pixel and the second pixel further has a second light source of a second color different from the first color; The number of the second light sources provided in the first pixel is greater than the number of the second light sources provided in the second pixel. The image display device according to claim 11.

13. The control unit is configured to be able to drive the light source for each pixel. The image display device according to claim 11.

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