Illumination device and display device

Abstract

To provide an illumination device that has been improved so that an occurrence of optical unevenness is reduced and illumination light of substantially uniform color tone can be obtained as a whole.SOLUTION: An illumination device includes light emission boards on which light emission parts for emitting light are provided, which are aligned along a plane with intervals from each other, and a connection member for electrically connecting the plurality of adjacent light emission boards. The connection member has a shape with the direction that the plurality of connected light emission boards are aligned as a short hand direction, and the direction intersecting with the short hand direction as a longitudinal direction, and covers the surface on the side where the light emission parts of the light emission boards are provided along the longitudinal direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to an illumination device and a display device including the illumination device. [Background technology]

[0002] Conventionally, lighting devices such as that described in Patent Document 1 have been known. This type of lighting device is configured with a plurality of point light sources, a chassis that houses the point light sources, a group of optical sheets that are arranged to cover the opening of the chassis, and a frame that surrounds the periphery. Within the chassis, a plurality of LEDs serving as point light sources are arranged at equal intervals on an LED substrate. A plurality of LED substrates are arranged along their longitudinal direction, and adjacent LED substrates are connected to each other by a connector. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2010 / 147005 Summary of the Invention [Problem to be solved by the invention]

[0004] In lighting devices, the light emitted from the LED can be reflected at different intensities at the LED board, the connector, and the gap between the LED board and the connector. This can lead to optical unevenness, such as localized brightness variations and display irregularities, and there is still room for improvement.

[0005] The present disclosure aims to provide an improved lighting device that reduces the occurrence of optical unevenness or provides illumination light with a generally uniform color tone overall, and a display device that includes the lighting device. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the lighting device according to the present disclosure is provided with a light-emitting section that emits light, and is equipped with a plurality of light-emitting boards that are arranged along a plane with gaps between them, and a connecting member that electrically connects the plurality of adjacent light-emitting boards, and the connecting member is characterized in that the direction in which the plurality of light-emitting boards connected by the connecting member are arranged is the short side direction, and the direction intersecting the short side direction is the long side direction.

[0007] In the lighting device, it is preferable that the connection member covers, along the longitudinal direction, a first surface of the light-emitting board on which the light-emitting portion is provided.

[0008] In the lighting device, it is preferable that the light emitting substrate has a recessed portion on the first surface for accommodating the connecting member.

[0009] In the lighting device, it is preferable that the connection member has a terminal portion for making the electrical connection, and an extension portion extending from the terminal portion along the longitudinal direction.

[0010] In the lighting device, it is preferable that the light emitting substrate has a connector that is electrically connected to the terminal portion.

[0011] In the lighting device, it is preferable that the connection member includes a portion along the longitudinal direction that has a different length in the lateral direction.

[0012] In addition, the lighting device according to the present disclosure includes a plurality of light-emitting substrates each having a light-emitting section that emits light and arranged along a plane with gaps between them, and a connecting member that connects adjacent light-emitting substrates, and the light-emitting substrates have a recessed portion that accommodates the connecting member on a first surface on the side where the light-emitting section is provided.

[0013] A display device including the illumination device having any of the above-described configurations is also within the scope of the technical concept of the present disclosure. That is, the display device of the present disclosure is characterized by including the illumination device and a display panel that displays information using light from the illumination device. [Effects of the Invention]

[0014] According to the present disclosure, it is possible to reduce the occurrence of optical unevenness or to improve illumination light so that it has a substantially uniform color tone overall. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is an exploded perspective view showing a liquid crystal display device according to an embodiment of the present disclosure. [Figure 2] 1 is a cross-sectional view showing a liquid crystal display device according to an embodiment. [Figure 3] 1 is a plan view schematically showing the configuration of a light emitting substrate of a backlight device according to Embodiment 1. FIG. [Figure 4] 3 is an enlarged plan view showing an electrical connection portion of an LED substrate in the backlight device. FIG. [Figure 5A] 4 is a cross-sectional view schematically showing a connection form of a connector of the electrical connection portion. FIG. [Figure 5B] 5B is an enlarged cross-sectional view showing an electrical connection portion of the LED substrate shown in FIG. 5A. FIG. [Figure 6A] 10 is a cross-sectional view schematically showing a connection configuration of light-emitting substrates in a backlight device according to a second embodiment. FIG. [Figure 6B] 6B is an enlarged cross-sectional view showing an electrical connection portion of the LED substrate shown in FIG. 6A. FIG. [Figure 7] FIG. 10 is a plan view schematically showing the configuration of a light emitting substrate in a backlight device according to a third embodiment. [Figure 8A] 4 is a partially enlarged plan view showing an example of a connecting member for the light emitting substrate. FIG. [Figure 8B] 10 is a partially enlarged plan view showing another example of the connecting member of the light emitting substrate. FIG. [Figure 9] FIG. 10 is a plan view schematically showing a connection configuration of light emitting substrates in a backlight device according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] An illumination device and a display device according to an embodiment of the present disclosure will be described with reference to the drawings.

[0017] Fig. 1 is an exploded perspective view showing a liquid crystal display device 10 according to an embodiment of the present disclosure, and Fig. 2 is a cross-sectional view showing the liquid crystal display device 10. In this embodiment, a liquid crystal display device (an example of a display device) 10 including a backlight device 30 as an example of an illumination device is illustrated. Note that in the stacking direction of the components in Fig. 1 (the vertical direction in the figure), the liquid crystal panel 20 side will be referred to as the front side, and the backlight device 30 side will be referred to as the back side.

[0018] The liquid crystal display device 10 has an overall horizontally elongated rectangular shape, and as shown in FIG. 1, comprises a liquid crystal panel (an example of a display panel) 20 that displays images, and a backlight device (an example of an illumination device) 30 that irradiates light onto the liquid crystal panel 20, which are held together by a frame-shaped bezel 12 and a frame 14.

[0019] The liquid crystal panel 20 has a horizontally long rectangular shape overall, and is sandwiched between the bezel 12 and the frame 14 with its display surface capable of displaying images facing outward. The liquid crystal panel 20 is configured by bonding a pair of highly translucent transparent substrates together with a predetermined gap between them, and a liquid crystal layer is sealed between the two glass substrates. Polarizing plates (not shown) are arranged on the outside of both glass substrates.

[0020] The bezel 12 extends along the periphery of the front side of the liquid crystal panel 20, and constitutes the appearance of the front side of the liquid crystal display device 10. The bezel 12 is preferably made of a metal with excellent rigidity (e.g., stainless steel or an aluminum-based material) or a resin with light-blocking properties.

[0021] The frame 14 is preferably made of a white resin (such as polycarbonate) that has excellent light reflectivity. A black tape-like member 151 is attached between the back side of the liquid crystal panel 20 and the frame 14 for fixing and blocking light.

[0022] As shown in Fig. 2, the backlight device 30 includes LEDs 50 as light-emitting units that emit light, and a light-emitting substrate 40 on which the LEDs 50 are mounted. The LEDs 50 are disposed facing the rear side (lower side) of the liquid crystal panel 20, and the backlight device 30 is a so-called direct-type backlight device. Note that the multiple LEDs on the light-emitting substrate 40 are not shown in Fig. 1.

[0023] The backlight device 30 further includes a diffusion plate 32, an optical sheet 31, and a chassis 33. The diffusion plate 32 diffuses light emitted from the LEDs 50. The diffusion plate 32 is thicker than the optical sheet 31, for example, having a thickness of about 3 mm, and is configured with a large number of diffusion particles dispersed in a transparent resin base material. By providing the diffusion plate 32, even if the distance from the LEDs 50 to the liquid crystal panel 20 is reduced, it becomes easier to suppress brightness unevenness (so-called LED unevenness) caused by the arrangement of the LEDs 50, and it becomes possible to reduce the thickness of the backlight device 30 and the liquid crystal display device 10.

[0024] The optical sheet 31 is disposed between the diffuser plate 32 and the liquid crystal panel 20, and imparts a predetermined optical effect to the light emitted from the diffuser plate 32, causing the light to be emitted toward the liquid crystal panel 20. The optical sheet 31 is relatively thin, for example, having a thickness of 30 μm, and is flexible. Various types of optical sheets 31 are known, and one or more types may be used as appropriate depending on the application of the liquid crystal display device 10, etc.

[0025] In this embodiment, for example, two lens sheets are used as the optical sheet 31, which provide a condensing effect to the light emitted from the diffuser plate 32 and emit the light toward the liquid crystal panel 20. Each lens sheet has a large number of unit lenses extending in a predetermined direction, which are arranged in a direction perpendicular to the extending direction. The two lens sheets are arranged so that the extending directions of the unit lenses are perpendicular to each other.

[0026] The chassis 33 is shaped like a tray that is open toward the light-emitting side (the liquid crystal panel 20 side), and houses the light-emitting substrate 40 in its bottom 331. As shown in Fig. 2, an outer periphery 332 of the chassis 33 protrudes toward the front side, and the diffusion plate 32 and the optical sheet 31 are stacked and placed on the outer periphery 332. A fixing tape-like member 152 that is white or the like and has excellent light reflectivity is attached between the front side of the optical sheet 31 and the frame 14.

[0027] The LEDs 50 are arranged in a matrix on a first surface (mounting surface 401) on the front side of the rectangular light emitting substrate 40. The LEDs 50 are rectangular parallelepiped-shaped, with their bottom surfaces arranged on the mounting surface 401 and their upper surfaces opposite the bottom surfaces serving as light emitting surfaces, making them so-called top-emitting (top-view) LEDs. The light emitting substrate 40 may also be non-rectangular.

[0028] In the illustrated embodiment, the LED 50 emits blue light (primary light) in the wavelength range of about 420 nm to about 500 nm. The LED 50 has a light-emitting surface area of ​​5.0 mm 2 The following and a general LED (with a light-emitting surface area of ​​10.0 mm 2 The LED50 is a small LED with a light-emitting surface area of ​​0.01mm. 2 Over 1.0mm 2 The LED 50 is preferably a so-called mini LED or micro LED, as described below. The LED 50 may be packaged in a miniaturized package such as a CSP (Chip Scale Package) or flip chip type.

[0029] As will be described later, the light emitting substrate 40 includes a plurality of LED substrates 400 arranged along a plane with gaps between them, and is an assembly of a plurality of LED substrates 400. The light emitting substrate 40 has a wiring pattern made of a metal film such as copper foil provided on the surface of a substrate (made of, for example, an aluminum-based metal material or an insulating material such as glass epoxy or ceramic) via an insulating layer. Driving power is supplied to the light emitting substrate 40 and the LEDs 50 from an external power source (such as an LED driving substrate) via the wiring pattern. The light emitting substrate 40 may be a flexible film-like substrate having flexibility.

[0030] (Embodiment 1) As the first embodiment of the present disclosure, a specific configuration of the light emitting substrate 40 of the backlight device 30 will be described. FIG.

[0031] The light emitting substrate 40 constituting the backlight device 30 includes a plurality of LED substrates 400 arranged along the plane of the bottom 331 of the chassis 33. Adjacent LED substrates 400 are arranged at intervals from each other, and the LED substrates 400 are electrically connected to each other by connecting members 60. In this disclosure, "adjacent" does not necessarily mean that they are in contact with each other, but also includes being arranged next to each other with an interval between them.

[0032] 3, a plurality of LED substrates 400 are installed inside the bottom 331 of the chassis 33. The LED substrates 400 are made of, for example, synthetic resin, and are formed as plate-like members. A wiring pattern made of a metal film such as copper foil is formed on the surface of the LED substrates 400, and LEDs 50 (not shown) are mounted on the wiring pattern.

[0033] In the illustrated embodiment, four LED substrates 400 are arranged as the light-emitting substrate 40 along the X direction, which corresponds to the long side direction of the chassis 33, and two LED substrates 400 are arranged in the Y direction, which corresponds to the short side direction of the chassis 33. All of these multiple LED substrates 400 that make up the light-emitting substrate 40 are made of a common substrate material. The number and arrangement of the LED substrates 400 that make up the light-emitting substrate 40 are not limited to the example shown in Fig. 3, and any configuration may be used as long as the multiple LED substrates 400 are arranged along a plane with gaps between them.

[0034] The connecting member 60 has a shape in which the direction in which the two LED substrates 400 to be connected are aligned is the short side direction, and the direction intersecting the short side direction is the long side direction. In the illustrated embodiment, the connecting member 60 has a shape in which the short side direction is the X direction, and the long side direction is the Y direction perpendicular to the X direction. An example of such a connecting member 60 is a flexible flat cable having a flat surface using a flexible film.

[0035] More specifically, the connection member 60 has a terminal portion 61 for electrical connection and an extension portion 62 extending along the Y direction, which is the longitudinal direction. The terminal portion 61 is formed integrally with the extension portion 62 and extends from the extension portion 62 in the X direction. The extension portion 62 is formed long along the Y direction and is disposed between the LED substrates 400 adjacent in the X direction. The length in the Y direction of the extension portion 62 is preferably equal to the length in the Y direction of the LED substrates 400 to be connected, or may be longer than the length in the Y direction of the LED substrates 400.

[0036] 3, the connecting member 60 is disposed between the LED substrates 400 with its longitudinal direction facing the Y direction. The connecting member 60 covers the mounting surface 401 of the LED substrate 400 along the Y direction at the extension portion 62, and is provided so as to cover the LED substrate 400 at the terminal portion 61 so as to overlap with a wide area in the X direction.

[0037] In the LED substrate 400, the entire edge portion extending in the Y direction does not have to be covered by the connecting member 60, and both ends in the Y direction may include portions that are not covered by the connecting member 60. A reflective sheet 70, for example, is disposed between the LED substrates 400 adjacent to each other in the Y direction. Even if there are portions at both ends of the LED substrate 400 in the Y direction that are not covered by the connecting member 60, the LED substrates 400 can be covered by the reflective sheet 70.

[0038] The reflective sheet 70 is a sheet material made of, for example, a white polyester or PET resin, and improves light utilization efficiency. The gaps between the LED substrates 400 are covered by the reflective sheet 70. As a result, the LED substrates 400 adjacent to each other in the X direction are connected by the connecting member 60, and the reflective sheet 70 is provided between the LED substrates 400 adjacent to each other in the Y direction.

[0039] In order to improve the light utilization efficiency, a highly reflective layer may be further provided on mounting surface 401. The highly reflective layer is provided, for example, by applying a highly reflective coating (white paint) or by evaporating silver (Ag), aluminum (Al), or the like.

[0040] 4 is an enlarged plan view showing the electrical connection portion of adjacent LED substrates 400. In the light-emitting substrate 40, a connector 41 that electrically connects to the terminal portion 61 is further provided on each of the adjacent LED substrates 400.

[0041] The LED substrates 400 are electrically and physically connected to one another by connectors 41. In the light-emitting substrate 40, an external control unit (not shown) is connected to the multiple LED substrates 400, and the control unit controls the supply of power required for the LEDs and other components mounted on the LED substrates 400, and is also capable of controlling the driving of the LEDs.

[0042] 5A is a cross-sectional view schematically showing the connection state of the connector 41, and FIG. 5B is an enlarged cross-sectional view showing the electrical connection portion of the LED substrate 400, which corresponds to the cross section AA in FIG.

[0043] As shown in FIGS. 5A and 5B, the terminal portion 61 of the connection member 60 disposed between adjacent LED substrates 400 is connected to the connector 41.

[0044] 5B, the connectors 41 include a connector 41 attached to an LED board 400 located relatively on the left side, and a connector 41 attached to an LED board 400 located relatively on the right side. The connectors 41 and the terminal portions 61 are fitted together to complete the connection between the LED boards 400.

[0045] Conventionally, adjacent LED boards are connected only by connectors, and gaps are provided between the LED boards. In contrast, in this embodiment, adjacent LED boards 400 in the X direction are connected by connecting members 60, and a reflective sheet 70 is provided between adjacent LED boards 400 in the Y direction, covering most of the gaps.

[0046] This makes it possible to suppress uneven brightness and uneven display caused by gaps between the LED substrates 400. In the backlight device 30, it is possible to reduce the occurrence of optical unevenness and also to improve the backlight device 30 so that illumination light with a generally uniform color tone can be obtained.

[0047] 5B, the difference in reflectance between the mounting surface 401 of one LED substrate 400a and the mounting surface 401 of the adjacent other LED substrate 400b is preferably within 0.05% of the reflectance of the connecting member 60. The connector 41 preferably has a surface color of, for example, a whitish color with excellent light reflectivity. This makes it possible to more effectively suppress optical unevenness, such as brightness unevenness and display unevenness, caused by reflected light.

[0048] 3, the LED substrates 400 adjacent to each other in the Y direction may be connected by a connecting member 60 instead of the reflective sheet 70. Alternatively, the LED substrates 400 adjacent to each other in the X direction may be covered with a reflective sheet 70 instead of the connecting member 60, and the LED substrates 400 adjacent to each other in the Y direction may be connected by the connecting member 60.

[0049] The liquid crystal display device (display device) 10 according to this embodiment includes a backlight device 30 having the above-described configuration, and a liquid crystal panel (display panel) 20 that displays an image using light emitted from the backlight device 30. Such a liquid crystal display device 10 suppresses unevenness in brightness and display of the light emitted from the backlight device 30, making it possible to obtain excellent display quality.

[0050] (Embodiment 2) The following describes the configuration of the light emitting substrate 40 provided in the backlight device 30 according to embodiment 2. In the embodiments described below, the basic configurations of the backlight device 30 and the liquid crystal display device 10 are the same as those in embodiment 1, and therefore redundant descriptions of the configurations, actions, and effects similar to those in embodiment 1 will be omitted.

[0051] FIG. 6A is a cross-sectional view schematically showing the connection configuration of the light-emitting substrate 40 in the backlight device 30 according to the second embodiment, and FIG. 6B is an enlarged cross-sectional view showing the electrical connection portion of the LED substrate 400.

[0052] In the LED substrate 400 constituting the light emitting substrate 40, a mounting surface 401 on which the LEDs 50 are mounted may be provided with a recess 42 for accommodating the connecting member 60. As shown in Fig. 6A, for example, in the LED substrate 400, a region on the mounting surface 401 where the connecting member 60 is disposed is provided with a concave recess 42 corresponding to the planar shape of the connecting member 60, thereby reducing the thickness of the LED substrate 400. The connecting member 60 is disposed in such a recess 42.

[0053] As shown in FIG. 6B , a connector 41 is further disposed in the recess 42 so as to overlap the terminal portion 61 of the connection member 60. This electrically connects adjacent LED boards 400 to each other. The connector 41 and the terminal portion 61 are disposed so as to be embedded in the recess 42. The surface of the connector 41 can be configured to be substantially flush with the mounting surface 401 of the LED board 400. This allows the optical path lengths of reflected light to be equal between the mounting surface 401 and the connector 41, making it possible to further suppress the occurrence of optical unevenness such as brightness unevenness and display unevenness.

[0054] (Embodiment 3) FIG. 7 is a plan view schematically showing the configuration of a light emitting substrate 40 in a backlight device 30 according to the third embodiment.

[0055] The connecting member 60 electrically connecting the LED substrates 400 to each other has an extending portion 62 extending along the Y direction, for example, assuming that the Y direction is the longitudinal direction, and a terminal portion 61 extending in the lateral direction from the extending portion 62. The connecting member 60 may further include portions having different lengths in the lateral direction.

[0056] 7, the connecting member 60 includes a terminal portion 61, an extension portion 62, and an expanded portion 63. The expanded portion 63 is provided by expanding the extension portion 62 in the X direction, which is the short side direction. Like the terminal portion 61, the expanded portion 63 is arranged on the LED substrate 400 so as to overlap with the terminal portion 61.

[0057] In the illustrated embodiment, the widened portions 63 are provided in a substantially triangular shape with one side in the Y direction. The widened portions 63 are evenly arranged on both sides of the extending portion 62 in the X direction in the connecting member 60, with two widened portions 63 provided on one side of the extending portion 62 in the X direction and two widened portions 63 similarly provided on the other side in the X direction. The widened portions 63 are arranged to face each other with the extending portion 62 in between.

[0058] The connecting members 60 are preferably arranged so that the widened portions 63 are located closer to the center of the chassis 33. As shown in Fig. 7, the connecting members 60 that connect the LED boards 400 adjacent to each other in the X direction are arranged symmetrically with respect to the reflective sheet 70 extending in the X direction. This allows more widened portions 63 to be arranged closer to the center of the light emitting board 40.

[0059] Even if misalignment or the like occurs when the connecting member 60 is disposed relative to the LED substrate 400, the provision of such widened portions 63 allows the adjacent LED substrates 400 to be covered without any gaps. This makes it possible to more effectively suppress the occurrence of optical unevenness. In particular, by disposing more widened portions 63 closer to the center of the light-emitting substrate 40, it is possible to suppress the occurrence of optical unevenness near the center, thereby improving display quality.

[0060] The form of the widened portion 63 is not limited to the example shown in Fig. 7. Figs. 8A and 8B are plan views showing other examples of the connecting member 60 in a partially enlarged manner.

[0061] As shown in Fig. 8A, the connecting member 60A has terminal portions 61 provided at multiple locations in the Y direction, which is the longitudinal direction of the extending portion 62. In this case, the connecting member 60A can be a member equivalent to the two connecting members 60 that connect the LED substrates 400 adjacent in the Y direction in the light-emitting substrate 40 shown in Fig. 7. The connecting member 60A has terminal portions 61 that face each other across the extending portion 62, provided at two locations in the Y direction and spaced apart from each other. In addition, multiple widening portions 63 that face each other across the extending portion 62 are arranged between one terminal portion 61 and the other terminal portion 61 in the Y direction.

[0062] 8B, the widening portion 64 does not have to be formed in a substantially triangular shape. In this case, the connecting member 60B has a plurality of widening portions 64, each of which is formed in a substantially semicircular shape and faces each other across the extension portion 62. The widening portions 64 aligned in the Y direction may be spaced apart from each other.

[0063] In the light-emitting substrate 40 that constitutes the backlight device 30, by connecting the LED substrates 400 together using such connecting members 60A and 60B, the occurrence of optical unevenness can be suitably reduced and the labor required for connection can be reduced.

[0064] (Other embodiments) The present disclosure is not limited to the above description and the embodiments shown in the drawings, and the following embodiments, for example, are also included within the technical scope of the present disclosure.

[0065] (1) The LED 50 does not have to be a small LED, and this technology can also be applied to lighting devices using larger LEDs. The wavelength range of the primary light emitted by the LED 50 is not limited, and each single color may be emitted.

[0066] (2) The bezel 12 and the frame 14 may be non-frame-shaped as long as they are capable of holding at least a portion of the liquid crystal panel 20 and the backlight device 30. Furthermore, the bezel 12 and the frame 14 do not have to both be provided, and only one of them may hold the liquid crystal panel 20 and the backlight device 30.

[0067] (3) The optical sheet 31, the diffusion plate 32, etc. may be supported by a different structure than the outer periphery 332 of the chassis 33.

[0068] (4) The connecting members 60, 60A, 60B may have any configuration that includes portions with different short-side lengths along the longitudinal direction, and is not limited to the configuration of the widened portions 63, 64 described above, and the widened portions 63, 64 do not necessarily overlap with the LED substrate 400. For example, as shown in Fig. 9, the connecting members 60 may have a configuration in which the extension portion 62 is disposed between the LED substrates 400, the terminal portion 61 is connected to the LED substrate 400, and the widened portion 64 is not disposed on the LED substrate 400. A configuration in which a portion of the widened portion 64 overlaps with the LED substrate 400 may also be used.

[0069] (5) The liquid crystal panel 20, the backlight device 30, and the liquid crystal display device 10 may be non-rectangular.

[0070] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the technical gist thereof, and all technical matters included in the technical ideas described in the claims are the subject of the present disclosure. The above-described embodiments are preferred examples, but various modifications can be realized from the disclosed contents, and such modifications are also included in the technical scope described in the claims. [Explanation of symbols]

[0071] 10 Liquid crystal display device (display device) 20 LCD panel (display panel) 30 Backlight device (lighting device) 31 Optical Sheet 32 Diffuser 33 chassis 331 Bottom 332 outer edge 40 Light-emitting substrate (whole) 400 LED board (light-emitting board) 401 Mounting surface (first surface) 41 Connector 42 recess 50 LED (light emitting part) 60, 60A, 60B connecting members 61 Terminal section 62 Stretching section 63, 64 Widened section 70 Reflective Sheet

Claims

1. a plurality of light-emitting substrates each having a light-emitting portion that emits light and arranged along a plane with gaps between them; a connecting member that electrically connects the adjacent plurality of light emitting substrates, The lighting device is characterized in that the connecting member has a shape in which the direction in which the multiple light-emitting substrates connected by the connecting member are arranged is the short side direction and the direction intersecting the short side direction is the long side direction.

2. 2. The lighting device according to claim 1, The lighting device is characterized in that the connection member covers a first surface of the light-emitting substrate on which the light-emitting portion is provided along the longitudinal direction.

3. 3. The lighting device according to claim 2, The lighting device according to claim 1, wherein the light-emitting substrate has a recessed portion on the first surface that accommodates the connecting member.

4. 2. The lighting device according to claim 1, The lighting device is characterized in that the connection member has a terminal portion for making the electrical connection and an extension portion extending from the terminal portion along the longitudinal direction.

5. 5. The lighting device according to claim 4, The lighting device is characterized in that the light-emitting substrate has a connector that is electrically connected to the terminal portion.

6. 2. The lighting device according to claim 1, The lighting device, wherein the connecting member includes a portion along the longitudinal direction that has a different length in the lateral direction.

7. a plurality of light-emitting substrates each having a light-emitting portion that emits light and arranged along a plane with gaps between them; a connecting member that connects the adjacent plurality of light emitting substrates, The lighting device according to claim 1, wherein the light-emitting substrate has a recessed portion for accommodating the connecting member on a first surface on which the light-emitting portion is provided.

8. A lighting device according to any one of claims 1 to 7; A display device comprising a display panel that displays information by utilizing light from the illumination device.

Images