Display device

Abstract

To provide a display device capable of being reduced in height.SOLUTION: A display device includes: a display panel; a first light guide part to guide light along an optical axis toward the front side of a screen of the display panel; a substrate formed along a lateral direction of the display panel and a depth direction from the front side of the display panel toward the back side thereof; a light emitting element fixed to the substrate so as to emit light along the optical axis at a position shifted from the optical axis toward the display panel; and a second light guide part provided between the light emitting element and the first light guide, the second light guide being tilted so as to guide light emitted from the light emitting element to the first light guide part.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present disclosure relates to a display device. [Background technology]

[0002] As disclosed in the following Patent Document 1, for example, a portion of the frame of a display panel of a display device that extends laterally below the display panel includes a light-emitting unit that emits light toward the front of the display panel to provide some kind of notification. This light-emitting unit has a light-emitting element inside its housing. The light emitted by the light-emitting element travels from inside the housing to outside the housing through a through-hole in the housing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-71919 Summary of the Invention [Problem to be solved by the invention]

[0004] In the light-emitting unit disclosed in Patent Document 1, the substrate on which the light-emitting elements are mounted is installed parallel to the display panel. In other words, the width direction of the substrate is parallel to the height direction of the display panel. In this case, the height of the housing of the light-emitting structure must be greater than the width of the substrate. Therefore, it is not possible to reduce the height of, for example, the portion of the frame of the display panel of the display device that extends laterally below the display panel. Therefore, it is not possible to reduce the height of the display device (excluding the stand).

[0005] The present disclosure has been made in view of the above-mentioned problems, and an object of the present disclosure is to provide a display device that can be reduced in height. [Means for solving the problem]

[0006] The display device of the present disclosure includes a display panel, a first light guide section that guides light along an optical axis toward the front side of a screen of the display panel, a substrate formed along the lateral direction of the display panel and the depth direction from the front side to the back side of the display panel, a light emitting element fixed to the substrate so as to emit light along the optical axis at a position offset from the optical axis toward the display panel, and a second light guide section that is provided between the light emitting element and the first light guide section and is inclined so as to guide the light emitted by the light emitting element to the first light guide section. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a front view of a display device according to a first embodiment. [Figure 2] 2. FIG. 3 is a partial vertical cross-sectional view of the display device of the first embodiment, taken along line II-II of FIG. [Figure 3] FIG. 2 is a perspective view of the light-emitting unit according to the first embodiment. [Figure 4] FIG. 2 is a plan view of the light-emitting unit according to the first embodiment. [Figure 5] FIG. 2 is a partial plan view of the light-emitting unit according to the first embodiment. [Figure 6] FIG. 2 is a partial front view of the light-emitting unit according to the first embodiment. [Figure 7] FIG. 2 is a partial perspective view of the light-emitting unit according to the first embodiment. [Figure 8] 1 is a partial perspective cross-sectional view of a light-emitting unit according to a first embodiment. [Figure 9] 9 is a partial vertical cross-sectional view of the light-emitting unit of the first embodiment, taken along line IX-IX in FIGS. 5 and 6. FIG. [Figure 10] 7 is a partial cross-sectional view of the light-emitting unit of the first embodiment, taken along line XX in FIG. 6. FIG. [Figure 11] FIG. 10 is a partial plan view of a light-emitting unit according to a second embodiment. [Figure 12] FIG. 10 is a partial front view of the light-emitting unit of the second embodiment. [Figure 13] FIG. 10 is a partial perspective view of a light-emitting unit according to a second embodiment. [Figure 14] FIG. 10 is a partial perspective cross-sectional view of a light-emitting unit according to a second embodiment. [Figure 15] 13 is a partial vertical cross-sectional view of the light-emitting unit of the second embodiment, taken along line XV-XV in FIGS. 11 and 12. FIG. [Figure 16] 16 is a partial cross-sectional view of the light-emitting unit of the second embodiment, taken along line XVI-XVI in FIG. 12. FIG. [Figure 17] FIG. 11 is a partial plan view of a light-emitting unit according to a third embodiment. [Figure 18] FIG. 11 is a partial front view of the light-emitting unit of the third embodiment. [Figure 19] FIG. 11 is a partial perspective view of a light-emitting unit according to a third embodiment. [Figure 20] FIG. 11 is a partial perspective cross-sectional view of a light-emitting unit according to a third embodiment. [Figure 21] 19 is a partial vertical cross-sectional view of the light-emitting unit of the third embodiment, taken along line XXI-XXI in FIGS. 17 and 18. FIG. [Figure 22] 12 is a partial cross-sectional view of the light-emitting unit of the third embodiment, taken along line XXII-XXII of FIG. 18. FIG. [Figure 23] FIG. 10 is a partial plan view of a light-emitting unit according to a fourth embodiment. [Figure 24] FIG. 10 is a partial front view of the light-emitting unit of the fourth embodiment. [Figure 25] FIG. 10 is a partial perspective view of a light-emitting unit according to a fourth embodiment. [Figure 26] FIG. 10 is a partial perspective cross-sectional view of a light-emitting unit according to a fourth embodiment. [Figure 27] 27 is a partial vertical cross-section of the light-emitting unit of the fourth embodiment, taken along line XXVII-XXVII in FIGS. 23 and 24. FIG. [Figure 28] 25 is a partial cross-sectional view of the light-emitting unit of the fourth embodiment, taken along line XXVIII-XXVIII in FIG. 24. FIG. [Figure 29] FIG. 10 is a partial plan view of a light-emitting unit according to a fifth embodiment. [Figure 30] FIG. 10 is a partial front view of the light-emitting unit of the fifth embodiment. [Figure 31]FIG. 10 is a partial perspective view of a light-emitting unit according to a fifth embodiment. [Figure 32] FIG. 11 is a partial perspective cross-sectional view of a light-emitting unit according to a fifth embodiment. [Figure 33] 31 is a partial vertical cross-sectional view of the light-emitting unit of the fifth embodiment, taken along the line XXXIII-XXXIII in FIGS. 29 and 30. FIG. [Figure 34] 31 is a partial cross-sectional view of the light-emitting unit of the fifth embodiment, taken along line XXXIV-XXXIV in FIG. 30. FIG. [Figure 35] FIG. 13 is a partial plan view of a light-emitting unit according to a sixth embodiment. [Figure 36] FIG. 13 is a partial front view of the light-emitting unit of the sixth embodiment. [Figure 37] FIG. 13 is a partial perspective view of a light-emitting unit according to a sixth embodiment. [Figure 38] FIG. 13 is a partial perspective cross-sectional view of a light-emitting unit according to a sixth embodiment. [Figure 39] 37 is a partial vertical cross-sectional view of the light-emitting unit of the sixth embodiment, taken along the line XXXIX-XXXIX in FIGS. 35 and 36. FIG. [Figure 40] 37 is a partial cross-sectional view of the light-emitting unit of the sixth embodiment, taken along the line XL-XL of FIG. 36. FIG. [Figure 41] FIG. 13 is a partial plan view of the light-emitting unit of the seventh embodiment. [Figure 42] FIG. 13 is a partial front view of the light-emitting unit of the seventh embodiment. [Figure 43] FIG. 13 is a partial perspective view of a light-emitting unit according to a seventh embodiment. [Figure 44] FIG. 13 is a partial perspective cross-sectional view of a light-emitting unit according to a seventh embodiment. [Figure 45] 44 is a partial vertical cross-sectional view of the light-emitting unit of the seventh embodiment, taken along line XLV-XLV in FIGS. 42 and 43. FIG. [Figure 46] 46 is a partial cross-sectional view of the light-emitting unit of the seventh embodiment, taken along line XLVI-XLVI of FIG. 43. FIG. [Figure 47] 13 is a diagram showing a light incident surface of a second light guide section of a light emitting unit according to a seventh embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, display devices according to embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same or equivalent elements are designated by the same reference numerals, and redundant description will not be repeated.

[0009] (Embodiment 1) A display device 100 according to the first embodiment will be described with reference to FIGS.

[0010] FIG. 1 is a front view of a display device 100 according to the present embodiment.

[0011] As shown in Fig. 1, the display device 100 of this embodiment includes a display panel 10 and a stand 120. The stand 120 is placed on an installation surface such as a desk or floor. The display panel 10 is fixed to the upper end of the stand 120. The display panel 10 includes a screen 11 and a frame portion 20.

[0012] Display panel 10 is a horizontally long rectangular flat plate when viewed from the front, but the shape of display panel 10 is not particularly limited and may be any shape, such as a circular or elliptical flat plate, or a shape with a curved screen 11. Frame 20 is formed along the periphery of display panel 10. Frame 20 is shaped as four straight line segments extending along each of the four sides of the rectangle, but may have any shape as long as it surrounds the periphery of display panel 10.

[0013] The frame portion 20 is provided with a predetermined width along the periphery of the display panel 10 so as to surround the display panel 10. A lower, horizontally extending portion of the frame portion 20 includes a light-emitting unit 21 that emits light.

[0014] Fig. 2 is a partial cross-sectional view of the display device 100 of the present embodiment. Fig. 3 and Fig. 4 are a perspective view and a plan view, respectively, of the light-emitting unit 21 of the display device 100 of the present embodiment.

[0015] In this embodiment, the display panel 10 is installed along imaginary planes extending in both the vertical and horizontal directions. The light-emitting unit 21 and the substrate 30 provided therein are installed along a horizontal plane. Therefore, the screen 11 of the display panel 10 and the main surface 31 of the substrate 30 are each formed along two planes that intersect perpendicularly. However, the orientation of the display panel 10 and the orientation of the substrate 30 may be any orientation as long as the screen 11 of the display panel 10 and the main surface 31 of the substrate 30 on which the electronic components are mounted are positioned so that the width of the frame 20 in the height direction of the display panel 10 is minimized.

[0016] The light-emitting unit 21 includes a container-shaped housing 40 and a substrate 30 provided inside the housing 40. The substrate 30 is a plate member. The thickness direction of the substrate 30 and the height direction of the housing 40 are parallel to each other. The height direction of the housing 40 is the height direction of the display panel 10, in other words, the height direction of the display device 100.

[0017] A light emitting element 50 is mounted on the substrate 30. The light emitting element 50 is fixed to the substrate 30 so as to emit light along a main surface 31 of the substrate 30. The light emitted by the light emitting element 50 is output from the first light guiding section 1 via the second light guiding section 2 to the external space.

[0018] 5 to 10 are a partial plan view, a partial front view, a partial perspective view, a partial perspective cross-sectional view, a partial vertical cross-sectional view, and a partial horizontal cross-sectional view, respectively, of the light-emitting unit 21 of the present embodiment.

[0019] The light-emitting unit 21 includes a container-shaped housing 40. The housing 40 has a through-hole 41 in a wall portion on the front side. The through-hole 41 is formed along the front-rear direction of the display device 100. The through-hole 41 forms a cylindrical space. A first light guide 1 is inserted into the through-hole 41. The first light guide 1 has a cylindrical portion that corresponds to the cylindrical shape of the through-hole 41. The first light guide 1 is fitted into the through-hole 41.

[0020] The first light guide unit 1 guides light toward the front side of the screen 11 of the display panel 10 along the optical axis of the first light guide unit 1. The substrate 30 is formed along the lateral and thickness directions of the display panel 10. The thickness direction of the display panel 10 refers to the depth direction from the front side to the rear side of the display panel 10. The front side of the display panel 10 is the side on which the screen 11 is provided, and the rear side of the display panel 10 is the side behind the side on which the screen 11 is provided. The main surface 31 of the substrate 30 is the upper surface of two opposing surfaces surrounded by end faces that form the periphery of the substrate 30. The light-emitting element 50 is fixed to the substrate 30 so as to emit light along the optical axis at a position offset from the optical axis toward the display panel 10.

[0021] The direction in which the central axis of the through-hole 41 that forms the disk-shaped space of the housing 40 extends coincides with the direction in which the central axis (or optical axis) of the cylindrical first light guide unit 1 extends. Light emitted by the light-emitting element 50 travels through the through-hole 41 to the outside of the housing 40. The light output from the through-hole 41 travels toward the front side of the display panel 10 in a direction perpendicular to the screen 11 of the display panel 10.

[0022] The second light guide 2 is provided between the light emitting element 50 and the first light guide 1. The second light guide 2 is inclined so as to guide the light emitted by the light emitting element 50 to the first light guide 1. This allows the light emitted by the light emitting element 50 to be guided to the first light guide 1 while reducing the width of the frame 20 in the direction perpendicular to the main surface 31 of the substrate 30 in a front view of the display device 100, specifically, while reducing the height of the frame 20. Therefore, in the display device 100 of this embodiment, the light emitting element 50 is provided inside the frame 20 below (or above) the rectangular display panel 10. According to the display device 100 of this embodiment, the height of the housing 40 can be reduced. Therefore, the width of the frame 20 can be reduced. As a result, the height of the display device 100 (excluding the stand 120) can be reduced. Also, since the height of the sound collection unit 21, which is disposed outside the frame portion 20 surrounding the display panel 10 and protrudes forward from the underside of the display panel 10, is reduced, the protrusion of the lower part of the display panel 10 becomes less noticeable, thereby improving the overall design of the display device 100. Furthermore, since the housing 40 that covers the sound collection unit 21 can be made smaller, the weight of the entire display device 100 can be reduced.

[0023] In this embodiment, the second light guiding section 2 has a tapered shape that narrows along the direction of travel of light emitted by the light emitting element 50. This allows the light to be effectively guided to the first light guiding section 1. The tapered shape of the second light guiding section 2 is formed by a part of the circumferential surface of a cone. This allows the light to be extremely effectively guided to the first light guiding section 1.

[0024] In this embodiment, the first light guiding section 1 and the second light guiding section 2 are formed as two independent members that are separated from each other. This increases the degree of freedom in designing the first light guiding section 1 and the second light guiding section 2. However, the first light guiding section 1 and the second light guiding section 2 may also be formed as a single structure that is inseparable from each other.

[0025] The second light guide 2 extends toward the light emitting element 50 along the main surface 31 of the substrate 30. The light incident surface 2X of the second light guide 2 is located near the light emitting element 50 along the main surface 31 of the substrate 30. However, the light incident surface 2X of the second light guide 2 may be in contact with the light emitting element 50. This configuration allows the light emitted by the light emitting element 50 to be collected almost completely, except for a very small portion of the light. As a result, it is possible to prevent a significant portion of the light emitted by the light emitting element 50 from traveling in a direction different from the direction of the second light guide 2, resulting in a large loss of light. Furthermore, the light exit surface 2Y of the second light guide 2 is located near the first light guide 1. However, the exit surface of the second light guide 2 may be in contact with the first light guide 1.

[0026] In the present embodiment, one light-emitting element 50 may be fixed to substrate 30, but as shown in Fig. 4, two light-emitting elements 51 may be arranged side by side on substrate 30 adjacent to one light-emitting element 50. In this case, for example, two types of light emitted by the two types of light-emitting elements 51 are collected by second light guiding section 2 and guided to first light guiding section 1 (see Fig. 4). In this way, the two types of light emitted by the two types of light-emitting elements 51 can be guided by a set of light guiding structures consisting of first light guiding section 1 and second light guiding section 2.

[0027] That is, the correspondence relationship between the light emitting elements and a set of light guiding structures made up of the first light guiding section 1 and the second light guiding section 2 may be a one-to-one relationship or a one-to-many relationship. However, when the correspondence relationship between the light emitting elements and a set of light guiding structures made up of the first light guiding section 1 and the second light guiding section 2 is a one-to-many relationship, it is preferable that a light condenser, which will be described later, condenses multiple light beams emitted from the multiple light emitting elements and guides them to the second light guiding section 2.

[0028] First light guiding section 1 has flange 1A that abuts against housing 40 having through-hole 41 into which first light guiding section 1 is inserted. Flange 1A functions as both a light collecting section that collects light emitted from light emitting element 50 or 51 and a positioning section that positions first light guiding section 1.

[0029] (Embodiment 2) 11 to 16, a display device 100 according to the second embodiment will be described. Note that, in the following, description of the same points as those in the display device according to the first embodiment will not be repeated. The display device according to the present embodiment differs from the display device according to the first embodiment in the following points.

[0030] 11 to 16 are a partial plan view, a partial front view, a partial perspective view, a partial perspective cross-sectional view, a partial vertical cross-sectional view, and a partial horizontal cross-sectional view, respectively, of a light-emitting unit 21 of the present embodiment.

[0031] As shown in FIGS. 11 to 16 , in this embodiment, the second light guide section 2 is also inclined so as to guide light to the first light guide section 1. Similar to the first embodiment, the second light guide section 2 having such a shape can reduce the height of the housing 40. Therefore, the width of the frame section 20 can be reduced. As a result, the height of the display device 100 (excluding the stand 120) can be reduced. Furthermore, the height of the sound collection unit 21, which is disposed outside the frame section 20 around the display panel 10 and protrudes forward from the lower side of the display panel 10, is reduced. This reduces the protrusion of the lower part of the display panel 10, thereby improving the overall design of the display device 100. Furthermore, the housing 40 covering the sound collection unit 21 can be made smaller, thereby reducing the weight of the entire display device 100.

[0032] In this embodiment, too, the light incident surface of the second light guide section 2 extends along the main surface 31 of the substrate 30 toward the light emitting element 50. More specifically, the second light guide section 2 has a shape that is inclined so that its central axis approaches the optical axis of the first light guide section 1. This allows the light emitted by the light emitting element 50 to be collected almost completely, except for a very small portion of the light. As a result, it is possible to prevent a large portion of the light emitted by the light emitting element 50 from traveling in a direction different from that of the second light guide section 2, thereby preventing a large loss of light.

[0033] In the present embodiment as well, the first light guiding section 1 and the second light guiding section 2 are formed as two independent members that are separated from each other, which increases the degree of freedom in designing the first light guiding section 1 and the second light guiding section 2. However, the first light guiding section 1 and the second light guiding section 2 may also be formed as a single structure that is inseparable from each other.

[0034] First light guiding section 1 has flange 1A that abuts against a wall of housing 40 having through-hole 41 into which first light guiding section 1 is inserted. Flange 1A functions as both a light collecting section that collects light emitted by light emitting element 50 and a positioning section that positions first light guiding section 1.

[0035] (Embodiment 3) 17 to 22, a display device 100 according to the third embodiment will be described. Note that, in the following, description of the same points as those in the display device according to the first embodiment will not be repeated. The display device according to the present embodiment differs from the display device according to the first embodiment in the following points.

[0036] 17 to 22 are a partial plan view, a partial front view, a partial perspective view, a partial perspective cross-sectional view, a partial vertical cross-sectional view, and a partial horizontal cross-sectional view, respectively, of a light-emitting unit 21 of this embodiment.

[0037] 17 to 22, in the present embodiment, the second light guide section 2 is also inclined so as to guide light to the first light guide section 1. Therefore, for the same reasons as those described in the above-described embodiments, the second light guide section 2 having a shape like that of the present embodiment can also reduce the height of the frame section 20 of the display panel 10, thereby reducing the height of the display device 100. Furthermore, the height of the sound collection unit 21, which is disposed outside the frame section 20 around the display panel 10 and protrudes forward from the lower side of the display panel 10, is reduced, making the protrusion of the lower part of the display panel 10 less noticeable, thereby improving the overall design of the display device 100. Furthermore, the housing 40 covering the sound collection unit 21 can be made smaller, thereby reducing the weight of the entire display device 100.

[0038] Furthermore, a portion of the second light guiding section 2 of this embodiment functions as a light concentrating section 3 that collects light emitted by the light emitting element 50 through the space and guides it to the first light guiding section 1. The light concentrating section 3 functions as a lens that collects light so that all of the light emitted by the light emitting element 50 is guided to the first light guiding section 1. Such a second light guiding section 2 can effectively guide light to the first light guiding section 1. Furthermore, since the thickness of the second light guiding section 2 in the height direction can be reduced, the occurrence of "sink marks" during plastic molding of the second light guiding section 2 can be suppressed.

[0039] Furthermore, the first light guide section 1 and the second light guide section 2 are integrally molded. That is, the first light guide section 1 and the second light guide section 2 are formed as a single member. This allows the number of parts of the display device 100 to be reduced. However, the first light guide section 1 and the second light guide section 2 of this embodiment may also be formed as separate, independent members. This embodiment also allows the height of the housing 40 to be reduced, as in the first or second embodiment. This allows the width of the frame section 20 to be reduced. As a result, the height of the display device 100 (excluding the stand 120) can be reduced.

[0040] The second light guide 2 includes a vertical light guide 2A that collects light in the vertical direction of the display panel 10, and a horizontal light guide 2B (light collecting section 3) that is integrated with the vertical light guide 2A and collects light in the horizontal direction of the display panel 10. Therefore, light can be collected effectively in both the vertical and horizontal directions of the display panel 10.

[0041] In this embodiment, a part of the horizontal light guiding section 2B configures the light collecting section 3 having an arc-shaped cross section of the incident surface 3A that protrudes toward the light emitting element 50 so as to collect light (see FIG. 22). With such a shape, the horizontal light guiding section 2B (light collecting section 3) can effectively collect the light emitted by the light emitting element 50.

[0042] (Fourth embodiment) 23 to 28, the display device 100 of the fourth embodiment will be described. Note that, in the following, description of the same points as those of the display device of the first embodiment will not be repeated. The display device of the present embodiment differs from the display device of the first embodiment in the following points.

[0043] 23 to 28 are a partial plan view, a partial front view, a partial perspective view, a partial perspective cross-sectional view, a partial vertical cross-sectional view, and a partial horizontal cross-sectional view, respectively, of the light-emitting unit 21 of this embodiment.

[0044] As shown in FIGS. 23 to 28, in this embodiment, the second light guide section 2 is also inclined so as to guide light to the first light guide section 1. The second light guide section 2 having such a shape can also reduce the height of the housing 40, as in the first to third embodiments described above. Therefore, the width of the frame section 20 can be reduced. As a result, the height of the display device 100 (excluding the stand 120) can be reduced. Furthermore, the height of the sound collection unit 21, which is disposed outside the frame section 20 around the display panel 10 and protrudes forward from the lower side of the display panel 10, is reduced. This reduces the protrusion of the lower part of the display panel 10, thereby improving the overall design of the display device 100. Furthermore, the housing 40 covering the sound collection unit 21 can be made smaller, thereby reducing the weight of the entire display device 100.

[0045] In the present embodiment, the cross section of the incident surface 3A of the light collecting unit 3 as part of the second light guiding unit 2 has an arc shape (see FIG. 28). With this shape, the light collecting unit 3 can effectively collect the light emitted by the light emitting element 50 in a horizontal plane.

[0046] (Embodiment 5) 29 to 34, the display device 100 of the fifth embodiment will be described. Note that, in the following, description of the same points as those of the display device of the first embodiment will not be repeated. The display device of the present embodiment differs from the display device of the first embodiment in the following points.

[0047] 29 to 34 are a partial plan view, a partial front view, a partial perspective view, a partial perspective cross-sectional view, a partial vertical cross-sectional view, and a partial horizontal cross-sectional view, respectively, of the light-emitting unit 21 of this embodiment.

[0048] As shown in FIGS. 29 to 34, in this embodiment, the second light guide section 2 is also inclined so as to guide light to the first light guide section 1. Similar to the first to fourth embodiments, the second light guide section 2 having such a shape can reduce the height of the housing 40. Therefore, the width of the frame 20 can be reduced. As a result, the height of the display device 100 (excluding the stand 120) can be reduced. Furthermore, the height of the sound collection unit 21, which is disposed outside the frame 20 around the display panel 10 and protrudes forward from the lower side of the display panel 10, is reduced. This reduces the protrusion of the lower part of the display panel 10, thereby improving the overall design of the display device 100. Furthermore, the housing 40 covering the sound collection unit 21 can be made smaller, thereby reducing the weight of the entire display device 100.

[0049] In this embodiment as well, the cross section of the incident surface 3A of the light collecting unit 3 has an arc shape that protrudes toward the light emitting element 50 (see FIG. 34). With this shape, the light collecting unit 3 can effectively collect the light emitted by the light emitting element 50 in a horizontal plane. In addition, in this embodiment, the vertical section of the incident surface 3A of the light collecting unit 3 also has an arc shape that protrudes toward the light emitting element 50 (see FIG. 33). With this shape, the light collecting unit 3 can effectively collect the light emitted by the light emitting element 50 in a plane that includes the vertical direction.

[0050] (Embodiment 6) 35 to 40, the display device 100 of the sixth embodiment will be described. Note that, in the following, description of the same points as those of the display device of the first embodiment will not be repeated. The display device of the present embodiment differs from the display device of the first embodiment in the following points.

[0051] 35 to 40 are a partial plan view, a partial front view, a partial perspective view, a partial perspective cross-sectional view, a partial vertical cross-sectional view, and a partial horizontal cross-sectional view, respectively, of the light-emitting unit 21 of the present embodiment.

[0052] As shown in FIGS. 35 to 40 , in this embodiment, the second light guide section 2 is also inclined so as to guide light to the first light guide section 1. Similar to the first to fifth embodiments, the second light guide section 2 having such a shape can reduce the height of the housing 40. Therefore, the width of the frame section 20 can be reduced. As a result, the height of the display device 100 (excluding the stand 120) can be reduced. Furthermore, the height of the sound collection unit 21, which is disposed outside the frame section 20 around the display panel 10 and protrudes forward from the lower side of the display panel 10, is reduced. This reduces the protrusion of the lower part of the display panel 10, thereby improving the overall design of the display device 100. Furthermore, the housing 40 covering the sound collection unit 21 can be made smaller, thereby reducing the weight of the entire display device 100.

[0053] In this embodiment, the cross section of the light incident surface 3A of the light collecting unit 3 forms an arc-shaped depression. Therefore, light can be effectively collected toward the first light guiding unit 1. The arc-shaped curved surface that forms the light incident surface 3A of the light collecting unit 3 in this embodiment is recessed toward the first light guiding unit 1. Note that the light incident surface 3A of the light collecting unit 3 may be a curved surface other than an arc-shaped curved surface.

[0054] (Embodiment 7) 41 to 47, the display device 100 of the seventh embodiment will be described. Note that, in the following, description of the same points as those of the display device of the first embodiment will not be repeated. The display device of the present embodiment differs from the display device of the first embodiment in the following points.

[0055] 41 to 47 are a partial plan view, a partial front view, a partial perspective view, a partial perspective cross-sectional view, a partial vertical cross-sectional view, and a partial horizontal cross-sectional view, respectively, of the light-emitting unit 21 of the present embodiment.

[0056] As shown in FIGS. 41 to 46, in this embodiment, the second light guide section 2 is also inclined so as to guide light to the first light guide section 1. Similar to the first to sixth embodiments, the second light guide section 2 having such a shape can reduce the height of the housing 40. Therefore, the width of the frame 20 can be reduced. As a result, the height of the display device 100 (excluding the stand 120) can be reduced. Furthermore, the height of the sound collection unit 21, which is disposed outside the frame 20 around the display panel 10 and protrudes forward from the lower side of the display panel 10, is reduced. This reduces the protrusion of the lower part of the display panel 10, thereby improving the overall design of the display device 100. Furthermore, the housing 40 covering the sound collection unit 21 can be made smaller, thereby reducing the weight of the entire display device 100.

[0057] In the present embodiment as well, the first light guide section 1 and the second light guide section 2 are formed as a single structure that cannot be separated from each other. This allows the number of parts of the display device 100 to be reduced.

[0058] In the present embodiment, the second light guiding section 2 also has a tapered shape that narrows along the traveling direction of light emitted by the light emitting element 50. This enables the light to be effectively guided to the first light guiding section 1. More specifically, the tapered shape of the second light guiding section 2 is formed by the peripheral surface of a cone.

[0059] In this embodiment, light collecting section 3 constituting a part of second light guiding section 2 has flange section 3B that abuts against housing 40 having through-holes 41 into which first light guiding section 1 and second light guiding section 2 are inserted. This flange section 3B functions as both a light collecting section and a positioning section that positions first light guiding section 1.

[0060] FIG. 47 is a diagram showing a light incident surface 3A of the second light guiding section 2 (light collecting section 3) of the light emitting unit 21 of the present embodiment.

[0061] 47, the light incident surface 3A of the light concentrator 3 as part of the second light guiding section 2 of this embodiment may be a knurled surface. Accordingly, if the light incident surface 3A of the second light guiding section 2 is a knurled surface, light can be effectively concentrated toward the first light guiding section 1. However, the light incident surface 3A of the light concentrator 3 may also be a flat surface. Furthermore, the light incident surface of the second light guiding section 2 may be a curved surface, for example, a curved surface that forms a part of a sphere, that is, a curved surface whose cross section is arc-shaped. [Explanation of symbols]

[0062] 1 1st light guide section 1A Tsubabe 2 Second light guide 2A Vertical light guide section 2B Horizontal light guiding section 3. Light collecting section 3A entrance surface 3B Tsubabe 10 Display panel 50 Light-emitting element 100 display device

Claims

1. A display panel; a first light guide unit that guides light along an optical axis toward a front side of a screen of the display panel; a substrate formed along a lateral direction of the display panel and a depth direction from the front side to the rear side of the display panel; a light-emitting element fixed to the substrate so as to emit light along the optical axis at a position shifted from the optical axis toward the display panel; a second light guiding section provided between the light emitting element and the first light guiding section and inclined so as to guide the light emitted by the light emitting element to the first light guiding section, Display device.

2. the second light guiding portion extends along the substrate toward the light emitting element; The display device according to claim 1 .

3. The first light guiding portion and the second light guiding portion are formed as two independent members separated from each other. The display device according to claim 1 .

4. the first light guiding portion has a flange portion that abuts against a housing having a through hole into which the first light guiding portion is inserted; The display device according to claim 1 .

5. The first light guiding section and the second light guiding section are integrally molded. The display device according to claim 1 .

6. The second light guiding section has a tapered shape that narrows along the traveling direction of the light. The display device according to claim 1 .

7. The tapered shape is formed by a part of the circumferential surface of a cone. The display device according to claim 6.

8. The second light guiding section is a vertical light guide portion that collects light in the vertical direction; a horizontal light guiding section integrated with the vertical light guiding section and configured to condense light in the horizontal direction, The display device according to claim 1 .

9. a part of the second light guiding section functions as a light collecting section that guides the light emitted by the light emitting element to the first light guiding section through a space; The display device according to claim 1 .

10. a cross section of the light incident surface of the second light guiding section, the cross section including the optical axis, is arc-shaped; The display device according to claim 1 .

11. The light incident surface of the second light guiding section is a knurled surface. The display device according to claim 1 .

12. a plurality of light-emitting elements including the light-emitting element, the plurality of light-emitting elements are arranged side by side on the substrate, The two types of light emitted by the plurality of light-emitting elements are collected by the second light-guiding section and guided to the first light-guiding section. The display device according to claim 1 .

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