Display device for vehicle

Abstract

The light guide (3) has: a rod-shaped first light guide (31) which is opposite to the light source (2); a plate-shaped second light guide (32) which is located between one end side and the other end side of the first light guide (31) and protrudes in a direction that intersects with the first light guide (31); an incident part (33) which is located at one end side of the first light guide (31); a plurality of first reflective cutting structures (34) which are located on the side of the first light guide (31) opposite to the second light guide (32); a plurality of second reflective cutting structures which are located on the back side of the second light guide (32); and a display light-emitting part (E1) which is located on the front side of the second light guide (32) and emits light from the front side of the second light guide (32) by emitting light reflected by the plurality of second reflective cutting structures to the outside, thereby emitting light in the form of a display pattern (P) formed by the plurality of second reflective cutting structures.

Description

Technical Field

[0001] This invention relates to a display device for vehicles.

[0002] This application claims priority based on Japanese Patent Application No. 2024-012949, filed on January 31, 2024, the contents of which are incorporated herein by reference. Background Technology

[0003] Conventionally, vehicle lighting fixtures mounted on vehicles have been known to have structures that combine light sources such as light-emitting diodes (LEDs) with rod-shaped or plate-shaped light guides (for example, see Patent Document 1 below).

[0004] In such vehicle lighting fixtures, light emitted from the light source enters from the base end of a light guide, is repeatedly reflected within the light guide, and is guided towards the front end of the light guide. Additionally, light reflected by multiple reflective cutting structures located on the back side of the light guide is emitted from the front side of the light guide. Thus, the light-emitting portion located on the front side of the light guide emits light in a linear or planar manner.

[0005] On the other hand, some vehicles are equipped with a vehicle display device that is mounted on the rear tailgate or trunk lid and displays the vehicle name, manufacturer name, logo, and other brand names as display patterns.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2023-020396 Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] Furthermore, the aforementioned vehicle display device and vehicle lamps are constructed separately. Therefore, a different light source is required to illuminate the displayed pattern. In addition, when using the same light source to illuminate both the displayed pattern and the light-emitting part of the vehicle lamps, a brightness difference will occur between the displayed pattern and the light-emitting part of the vehicle lamps due to the difference in distance from the light source, which may lead to a reduction in visual recognizability and aesthetics.

[0011] The present invention provides a vehicle display device that provides light emission with good visual recognizability and aesthetics.

[0012] Methods for solving problems

[0013] The present invention provides the following structure.

[0014] [1] A display device for a vehicle, characterized in that, The vehicle display device includes a light source and a light guide. The light guide has: A rod-shaped first light guide extends from one end opposite to the light source toward the other end. The plate-shaped second light guide is located between one end and the other end of the first light guide, and protrudes toward the side that intersects with the extending direction of the first light guide; An incident portion is located at at least one end of the first light guide portion, so that light emitted from the light source is incident into the interior of the first light guide portion; Multiple first reflective cut structures are located on the side opposite to the protruding side of the second light guide of the first light guide, and a portion of the light guided inside the first light guide is reflected toward the second light guide; Multiple second reflective cut structures, located on the rear side of the second light guide, reflect light guided inside the second light guide toward the front side of the second light guide; and The display light-emitting part is located on the front side of the second light guide part. It emits light from the front side of the second light guide part to the outside by means of light reflected by the plurality of second reflective cutting structures, thereby emitting light in a shape corresponding to the display pattern formed by the plurality of second reflective cutting structures.

[0015] [2] The vehicle display device according to [1] above is characterized in that, The light guide has: Multiple third reflective cut structures, located on the rear side of the first light guide, reflect light guided inside the first light guide toward the front side of the first light guide; and The linear light-emitting part, located on the front side of the first light guide part, emits light reflected by the plurality of third reflective cutting structures from the front side of the first light guide part to the outside, thereby emitting light in a linear shape.

[0016] [3] The vehicle display device according to [1] above is characterized in that, The display light-emitting part is formed by arranging multiple display patterns on the second light guide part along the extending direction of the first light guide part.

[0017] [4] The vehicle display device according to [1] above is characterized in that, The second light guide portion has: a plurality of connecting portions connected to the first light guide portion; and a slit portion forming a space between adjacent connecting portions of the plurality of connecting portions.

[0018] [5] The vehicle display device according to [4] above is characterized in that, The plurality of first reflective cutting structures are disposed on each portion opposite to the plurality of connecting portions.

[0019] [6] The vehicle display device according to [4] above is characterized in that, The connecting part is configured to connect the two ends of the first light guide part and the second light guide part. The first light guide portion has a light-guiding exit surface located on the side opposite to the space. The second light guide portion has a light guide incident surface located on the side opposite to the space. Light emitted from the light guide exit surface toward the space is incident on the interior of the second light guide portion from the light guide incident surface.

[0020] Invention Effects

[0021] As described above, according to the present invention, a vehicle display device capable of emitting light with good visual recognizability and aesthetics is provided. Attached Figure Description

[0022] Figure 1 This is a front view of a vehicle equipped with a vehicle lamp according to an embodiment of the present invention, viewed from the rear side.

[0023] Figure 2 It indicates composition Figure 1 The diagram shows a front view of the structure of a vehicle display device for vehicle lighting fixtures.

[0024] Figure 3 Based on Figure 2 The sectional view of the vehicle display device shown in line segment III-III.

[0025] Figure 4 Based on Figure 2 The cross-sectional view of the vehicle display device shown by line segment IV-IV.

[0026] Figure 5 Based on Figure 2 The line segment VV shown is a cross-sectional view of a vehicle display device.

[0027] Figure 6 Based on Figure 2 The cross-sectional view of the vehicle display device shown by line segment VI-VI.

[0028] Figure 7 It means Figure 2 A front view of a modified example of a vehicle display device shown.

[0029] Figure 8It means Figure 2 A front view of a modified example of a vehicle display device shown.

[0030] Figure 9 It means Figure 2 The diagram shows a front view of other structures of the display light-emitting part and the linear light-emitting part of the vehicle display device.

[0031] Figure 10 It means Figure 9 The diagram shows a front view of the structure of a vehicle display device.

[0032] Figure 11 It means Figure 2 The diagram shows a front view of another structure of the display light-emitting part and the linear light-emitting part of the vehicle display device.

[0033] Figure 12 It means Figure 11 The diagram shows a front view of the structure of a vehicle display device.

[0034] Figure 13 It means Figure 2 A front view of a modified example of the light guide on the incident portion side of the vehicle display device shown. Detailed Implementation

[0035] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0036] Furthermore, in the accompanying drawings used in the following description, the scale of the dimensions is sometimes different depending on the component to facilitate observation of each component, and the size ratio of each component may not be the same as the actual dimensions.

[0037] As one embodiment of the present invention, for example, Figures 1 to 13 The vehicle lamp 100 of the vehicle display device 1 shown will be described.

[0038] also, Figure 1 This is a front view of vehicle B, which is equipped with vehicle lights 100, viewed from the rear side. Figure 2 This is a front view showing the structure of the vehicle display device 1 that constitutes the vehicle lighting fixture 100. 3 is based on... Figure 2 The cross-sectional view of the vehicle display device 1 shown in line segment III-III. Figure 4 Based on Figure 2 The cross-sectional view of the vehicle display device 1 along line segment IV-IV shown. Figure 5 Based on Figure 2 The line segment VV shown is a cross-sectional view of the vehicle display device 1. Figure 6 Based on Figure 2The cross-sectional view of the vehicle display device 1 with line segment VI-VI shown. Figure 7 This is a front view showing a modified example of the vehicle display device 1. Figure 8 This is a front view showing a modified example of the vehicle display device 1. Figure 9 This is a front view showing the display light-emitting part E1 and the linear light-emitting part E2 of the vehicle display device 1. Figure 10 It means Figure 9 The front view of the structure of the vehicle display device 1 shown. Figure 11 This is a front view showing the display light-emitting part E1 and the linear light-emitting part E2 of the vehicle display device 1. Figure 12 It means Figure 11 The front view of the structure of the vehicle display device 1 shown. Figure 13 This is a front view showing a modified example of the incident portion 33 side of the light guide 3 of the vehicle display device 1.

[0039] In addition, in the following figures, an XYZ rectangular coordinate system is set, with the X-axis direction representing the front-back direction of the vehicle display device 1 (vehicle lamp 100), the Y-axis direction representing the left-right direction of the vehicle display device 1 (vehicle lamp 100), and the Z-axis direction representing the up-down direction of the vehicle display device 1 (vehicle lamp 100).

[0040] For example, Figure 1 As shown, the vehicle lamp 100 equipped with the vehicle display device 1 of this embodiment includes: a display light-emitting part E1, which is mounted on the rear side of the vehicle B and located in the center of the vehicle width direction, and illuminates and displays the vehicle name, manufacturer name, brand name, logo, etc. as a display pattern P; and a pair of linear light-emitting parts E2, which are located on both sides of the display light-emitting part E1 in the vehicle width direction, and extend along the vehicle width direction and emit light in a linear shape.

[0041] Furthermore, in the vehicle display device 1 of this embodiment, there is a structure in which the display light-emitting part E1 and a pair of linear light-emitting parts E2 are arranged in a straight line.

[0042] Furthermore, in the vehicle display device 1 of this embodiment, an example is shown where the display pattern P of the six letters "ABCDEF" is positively displayed by red light emission in the display light-emitting section E1, and as a taillight (TLL) of the vehicle light fixture 100, a pair of linear light-emitting sections E2 emit red light in a linear shape. In addition to the aforementioned text, the display pattern P can also include, for example, numbers, symbols, graphics, and characters, but is not particularly limited to these.

[0043] In addition to the taillight TLL mentioned above, the vehicle lighting 100 also has the following structure: brake lights (BRL) that emit red light brighter than the taillight (TLL) when the vehicle B brakes, turn signals (TRL) that flash orange light when the vehicle B turns or changes lanes, and reverse lights (BCL) that emit white light when the vehicle B reverses.

[0044] Furthermore, the lamps TLL, BRL, TRL, and BCL of the vehicle lamp 100 described above, excluding the taillight TLL, are separately configured with the vehicle display device 1 of this embodiment.

[0045] like Figures 2-6 As shown, the vehicle display device 1 of this embodiment includes two light sources 2 and a light guide 3, which have a structure disposed on a lamp body (not shown).

[0046] The lamp body consists of a housing with a front side opening and a transparent outer lens (not shown) covering the opening of the housing. Furthermore, the shape of the lamp body can be appropriately modified to match the design of vehicle B, etc. Alternatively, it can be configured such that lamp units constituting the aforementioned lamps BRL, TRL, and BCL are arranged inside the lamp body.

[0047] The two light sources 2 are, for example, composed of light-emitting elements such as LEDs that emit red light. In addition, the two light sources 2 are located on the outer side of the vehicle width direction sandwiching the light guide 3, and are configured to emit light L in opposite directions toward the inner side of the vehicle width direction.

[0048] Furthermore, the light source 2 can also be configured as a socket with a coupler that can be easily installed in a mounting hole provided on the back side of the housing (lamp body). Additionally, the light source 2 is not limited to being composed of a single light-emitting element, but can also be composed of multiple light-emitting elements.

[0049] The light guide 3 is made of transparent resins such as polycarbonate and acrylic, or light-transmitting components such as glass. The light guide 3 is located between the two light sources 2 and is continuously arranged in the vehicle width direction.

[0050] Specifically, the light guide 3 has: a first light guide portion 31 in the shape of a long rod, which extends from one end in the vehicle width direction toward the other end; and a second light guide portion 32 in the shape of a generally rectangular plate, which is located in the center between one end and the other end of the first light guide portion 31 and protrudes toward the side (upward in this embodiment) in a direction that intersects the extension direction of the first light guide portion 31.

[0051] The first light guide portion 31 is formed with a roughly circular cross-section. On the other hand, the second light guide portion 32 has a shape that is inclined from the back side to the front side, so that the thickness gradually decreases towards the end side.

[0052] The first light guide 31 has a central portion 31a located in the center of the vehicle width direction, a pair of side portions 31b located on both sides of the central portion 31a in the vehicle width direction, and a pair of curved portions 31c located between the central portion 31a and the pair of side portions 31b. The first light guide 31 has a shape in which the central portion 31a and the pair of side portions 31b are curved by the pair of curved portions 31c so that the second light guide 32 and the pair of side portions 31b are arranged in a straight line in the vehicle width direction.

[0053] The second light guide portion 32 has: a plurality of connecting portions 32a, which are located above the central portion 31a of the first light guide portion 31 and connected to the central portion 31a of the first light guide portion 31; and a plurality of slit portions 32b, which are located between adjacent connecting portions 32a of the plurality of connecting portions 32a.

[0054] Multiple connecting portions 32a are arranged on the second light guide portion 32 along the extending direction (vehicle width direction) of the first light guide portion 31 (central portion 31a) according to each portion corresponding to the six display patterns P displayed in the aforementioned display light-emitting portion E1. In addition, the multiple connecting portions 32a form portions that connect to the central portion 31a of the first light guide portion 31 with widths corresponding to each display pattern P.

[0055] Multiple slits 32b are configured to penetrate between adjacent connecting portions 32a of the multiple connecting portions 32a in the thickness direction (front-back direction in this embodiment) of the second light guide portion 32. Thus, spaces K are formed between adjacent connecting portions 32a of the multiple connecting portions 32a.

[0056] The light guide 3 has: a pair of incident portions 33 located at one end and the other end of the first light guide portion 31; a plurality of first reflective cutting structures 34 located at the central portion 31a of the first light guide portion 31; a plurality of second reflective cutting structures 35 located at the back side of the second light guide portion 32; a first exit portion 36 located at the front side of the second light guide portion 32; a plurality of third reflective cutting structures 37 located at the back side of the side portions 31b of the first light guide portion 31; and a second exit portion 38 located at the front side of the side portions 31b of the first light guide portion 31.

[0057] A pair of incident portions 33 have a flat (planar) incident surface 33a opposite to the light source 2 on one end side and the other end side of the first light guide portion 31.

[0058] At each incident portion 33, light L emitted from each light source 2 is incident from each incident surface 33a into the interior of the first light guide portion 31. As a result, the light L incident from each incident surface 33a is repeatedly reflected inside the first light guide portion 31 and guided from the side portions 31b of the first light guide portion 31 to the central portion 31a via the curved portion 31c.

[0059] Multiple first reflective cutting structures 34 are located on the surface (lower surface in this embodiment) of the central portion 31a of the first light guide portion 31 opposite to the protruding side of the second light guide portion 32, and are arranged in the extending direction (vehicle width direction) of the central portion 31a according to each part opposite to the multiple connecting portions 32a.

[0060] Furthermore, the plurality of first reflective cutting structures 34 are arranged in the vehicle width direction with a width corresponding to each connecting portion 32a. On the other hand, the portion opposite to the plurality of slit portions 32b becomes the area where the plurality of first reflective cutting structures 34 are not provided.

[0061] The multiple first reflective cutting structures 34 are not particularly limited in shape, size, or number, as long as they reflect the light L incident on the lower surface side of the central portion 31a toward each connecting portion 32a. For example, in this embodiment, the multiple first reflective cutting structures 34 are configured by arranging prism cutting structures with a roughly triangular cross-section in the vehicle width direction.

[0062] In the central portion 31a of the first light guide 31, light L that is guided inside the central portion 31a and is reflected by the plurality of first reflective cutting structures 34 is reflected toward each connecting portion 32a of the second light guide 32. Thus, after the light L reflected by the plurality of first reflective cutting structures 34 enters the interior of the second light guide 32 via each connecting portion 32a, it is guided toward the end side of the second light guide 32.

[0063] Multiple second reflective cutting structures 35 are disposed inside the contour of the shape corresponding to each of the six display patterns P displayed in the above-mentioned display light-emitting part E1.

[0064] Regarding the plurality of second reflective cut structures 35, as long as the light L incident on the back side of the second light guide 32 is reflected at an angle from the front side of the second light guide 32 outward (transmitted), their shape, size, number, etc. are not particularly limited. For example, in this embodiment, the plurality of second reflective cut structures 35 are configured by prism cut structures with approximately triangular cross-sections arranged in the plane corresponding to the shape of each display pattern P.

[0065] The first emission section 36 has a flat (planar) first emission surface 36a formed by the front surface of the second light guide section 32. In addition, a light-shielding layer 39 covering the outer side of the outline of each display pattern P is provided on the first emission surface 36a.

[0066] The light-shielding layer 39 is formed, for example, by providing a black coating on the first emission surface 36a and selectively removing (patterning) the coating located inside the outline of each display pattern P. Thus, a transmissive region with a shape corresponding to each display pattern P is provided on the first emission surface 36a.

[0067] Furthermore, the light-shielding layer 39 is not a necessary structure and can be omitted. Alternatively, instead of the light-shielding layer 39, the light-shielding components such as the frame and extensions can be arranged on the front side of the light guide 3.

[0068] In the first emission section 36, light L reflected by the plurality of second reflective cutting structures 35 is emitted from the transmission area in the first emission surface 36a corresponding to the inner side of the outline of each display pattern P to the outside of the second light guide section 32. As a result, each display pattern P can emit red light (positive display) as the display light-emitting section E1.

[0069] Regarding the multiple third reflective cutting structures 37, as long as the light L incident on the back side of the two side portions 31b is reflected at an angle that allows it to exit (transmit) from the front side of the two side portions 31b to the outside, there are no particular limitations on their shape, size, number, etc. For example, in this embodiment, as multiple third reflective cutting structures 37, prism cutting structures with a roughly triangular cross-section are arranged in the vehicle width direction within the range corresponding to the linear light-emitting portion E2.

[0070] The second ejection section 38 has a second ejection surface 38a formed by the front surfaces of the two side portions 31b. The second ejection surface 38a is formed by a convex curved surface that is bent into an arc shape.

[0071] In the second emission section 38, the light L reflected by the plurality of third reflective cutting structures 37 is emitted from the second emission surface 38a to the outside of the side portions 31b (first light guide section 31). As a linear light-emitting section E2, the second emission surface 38a can emit red light in a linear shape.

[0072] As described above, in the vehicle display device 1 of this embodiment, each display pattern P is positively displayed by red light emission in the display light-emitting section E1. As a taillight (TLL) of the vehicle lamp 100, a pair of linear light-emitting sections E2 can emit red light in a linear shape.

[0073] Furthermore, in the vehicle display device 1 of this embodiment, the same light source 2 described above can be used to simultaneously illuminate the display light-emitting portion E1 and the pair of linear light-emitting portions E2. Therefore, compared to the case where the display light-emitting portion E1 and the pair of linear light-emitting portions E2 are separately configured, the structure can be simplified, and manufacturing costs can be kept low.

[0074] Furthermore, in the vehicle display device 1 of this embodiment, by arranging the display light-emitting part E1 located in the center of the vehicle width direction and the pair of linear light-emitting parts E2 located on both sides of the vehicle width direction in a straight line and emitting light symmetrically from left to right, it is possible to obtain light with good visual recognition and aesthetics.

[0075] Furthermore, in the vehicle display device 1 of this embodiment, when the same light source 2 is used to simultaneously illuminate the display light-emitting part E1 and the pair of linear light-emitting parts E2, the spacing and depth of the multiple first reflective cut structures 34, 35, and 37 adjacent to each other can be adjusted for the multiple first reflective cut structures 34, multiple second reflective cut structures 35, and multiple third reflective cut structures 37, so that no brightness difference will occur between each display pattern P of the display light-emitting part E1 and the pair of linear light-emitting parts E2 due to the difference in distance from the light source 2.

[0076] Specifically, as the distance from the light source 2 increases, the spacing between adjacent reflective cutting structures 34, 35, and 37 can be gradually narrowed, or the depth can be gradually increased. Furthermore, in the display light-emitting section E1, the thickness of the multiple connecting sections 32a corresponding to the multiple display patterns P can be adjusted to gradually increase from both ends of the second light guide section 32 towards the center.

[0077] Therefore, in the vehicle display device 1 of this embodiment, when the same light source 2 is used to simultaneously illuminate the display light-emitting part E1 and the pair of line light-emitting parts E2, the display pattern P of each of these display light-emitting parts E1 and the pair of line light-emitting parts E2 can be illuminated more uniformly.

[0078] Furthermore, in the vehicle display device 1 of this embodiment, a plurality of connecting portions 32a corresponding to the plurality of display patterns P are provided, and a plurality of first reflective cutting structures 34 are provided in each portion opposite to these plurality of connecting portions 32a, thereby enabling each display pattern P to emit light efficiently.

[0079] That is, in the vehicle display device 1 of this embodiment, a plurality of first reflective cutting structures 34 are provided in each portion opposite to the plurality of connecting portions 32a, and no plurality of first reflective cutting structures 34 are provided in the portions opposite to each connecting portion 32a (the plurality of gap portions 32b). In this configuration, by efficiently guiding the light L in the light L guided inside the first light guide portion 31 that is reflected by the plurality of first reflective cutting structures 34 to the portion of the second light guide portion 32 corresponding to each display pattern P via the connecting portion 32a, each display pattern P can be made to emit light efficiently.

[0080] Furthermore, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

[0081] For example, in the vehicle display device 1 described above, the display light-emitting unit E1 is structured to positively display multiple display patterns P, but it can also be, for example, as... Figure 7 as well as Figure 8 As shown in the variant example, it becomes a structure that negatively displays these multiple display patterns P.

[0082] Specifically, in Figure 7 In the modified example shown, the above-mentioned slit portion 32b is omitted, and the second light guide portion 32 is connected to the central portion 31a of the first light guide portion 31 via a connecting portion 32a of the same width as the second light guide portion 32.

[0083] Correspondingly, a plurality of first reflective cut structures 34 are located on the lower surface of the central portion 31a of the first light guide portion 31, and are arranged in the extending direction of the first light guide portion 31 with a width corresponding to that of the second light guide portion 32. Furthermore, a plurality of second reflective cut structures 35 are provided on the outer side of the outline of the shape corresponding to each of the six display patterns P displayed in the aforementioned display light-emitting portion E1. And a light-shielding layer 39 covering the inner side of the outline of each display pattern P is provided on the first emission surface 36a.

[0084] With the above structure, the light L reflected by the multiple second reflective cutting structures 35 is emitted from the transmission area in the first emission surface 36a corresponding to the outer side of the outline of each display pattern P to the outside of the second light guide 32. As a result, as the display light-emitting part E1, red light (negative display) can be emitted from the outer side of the outline of each display pattern P.

[0085] On the other hand, Figure 8In the modified example shown, the two ends of the second light guide 32 in the vehicle width direction are connected to the central portion 31a of the first light guide 31 via a pair of connecting portions 32a. Furthermore, a gap 32b forming a space K is provided between the pair of connecting portions 32a.

[0086] Furthermore, a light-guiding exit surface 40a is provided in the central portion 31a of the first light guide section 31, opposite to the space K. On the other hand, a light-guiding incident surface 40b is provided in the second light guide section 32, opposite to the space. The light-guiding exit surface 40a and the light-guiding incident surface 40b are arranged parallel to each other with respect to the vehicle width direction.

[0087] Correspondingly, a plurality of first reflective cut structures 34 are located on the lower surface of the central portion 31a of the first light guide portion 31, and are arranged in the extending direction of the first light guide portion 31 with a width corresponding to the slit portion 32b. Furthermore, a plurality of second reflective cut structures 35 are provided on the outer side of the outline of the shape corresponding to each of the six display patterns P displayed in the aforementioned display light-emitting portion E1. And a light-shielding layer 39 covering the inner side of the outline of each display pattern P is provided on the first emission surface 36a.

[0088] With the above structure, the light L reflected by the multiple first reflective cutting structures 34 is emitted from the light-guiding exit surface 40a toward the space K, and then enters the interior of the second light guide section 32 from the light-guiding incident surface 40b. The light L incident on the second light guide section 32 is reflected by the multiple second reflective cutting structures 35. Furthermore, the light L reflected by the multiple second reflective cutting structures 35 is emitted from the transmission area in the first exit surface 36a corresponding to the outer side of the outline of each display pattern P to the outside of the second light guide section 32. Thus, as the display light-emitting section E1, red light (negative display) can be emitted from the outer side of the outline of each display pattern P.

[0089] In addition, other structures of the aforementioned vehicle display device 1 include, for example Figure 9 The vehicle display device 1A shown has the following structure: a display light-emitting part E1 located in the center of the vehicle width direction and a linear light-emitting part E2 located below the display light-emitting part E1 and extending from the center of the vehicle width direction to both sides of the vehicle width direction are arranged in parallel to each other.

[0090] In the case of this structure, such as Figure 10 As shown, the first light guide portion 31 omits the aforementioned curved portion 31c, forming a shape where the central portion 31a and a pair of side portions 31b are arranged in a straight line. Furthermore, a plurality of third reflective cutting structures 37 are located on the back side between the central portion 31a and the pair of side portions 31b of the first light guide portion 31, and are arranged in the extending direction of the first light guide portion 31. Apart from this, it has a structure substantially the same as the aforementioned vehicle display device 1.

[0091] In the vehicle display device 1A with the above structure, each display pattern P is positively displayed by red light emission in the display light-emitting section E1. As a taillight (TLL) of the vehicle lamp 100, the linear light-emitting section E2 extending from the center in the vehicle width direction toward both sides in the vehicle width direction can emit red light in a linear shape.

[0092] In addition, other structures of the aforementioned vehicle display device 1 include, for example, Figure 11 The vehicle display device 1B shown has the following structure: a display light-emitting unit E1 located at the center in the vehicle width direction and line light-emitting units E2 located above the display light-emitting unit E1 and extending from the center in the vehicle width direction to both sides are arranged parallel to each other. Furthermore, the vehicle display device 1B has a pair of display light-emitting units E3 located on both sides of the display light-emitting unit E1 in the vehicle width direction, displaying a decorative display pattern P. In this embodiment, an example is shown where multiple triangular marks forming the display pattern P are positively displayed by red light emission from the pair of display light-emitting units E3.

[0093] In the case of this structure, such as Figure 12 As shown, the first light guide portion 31 omits the aforementioned curved portion 31c and is formed with the central portion 31a and a pair of side portions 31b arranged in a straight line. Correspondingly, a plurality of third reflective cutting structures 37 are located on the back side between the central portion 31a and the pair of side portions 31b of the first light guide portion 31 and are arranged in the extending direction of the first light guide portion 31.

[0094] Furthermore, the second light guide 32 is located below the central portion 31a of the first light guide 31, and a plurality of first reflective cutting structures 34 are located on the upper surface side of the central portion 31a of the first light guide 31. That is, the second light guide 32 and the plurality of first reflective cutting structures 34 are configured in a way opposite to the structure of the vehicle display device 1 described above.

[0095] Furthermore, the light guide 3 has a pair of second light guide portions 32A that protrude downwards with the same width as the pair of side portions 31b. Correspondingly, a plurality of first reflective cutting structures 34 are located on the upper surface side between the pair of side portions 31b, and are arranged in the extending direction of the first light guide portion 31 with a width corresponding to the second light guide portions 32A.

[0096] Furthermore, in the second light guide section 32A, a plurality of second reflective cutting structures 35 are provided inside the contour of the shape corresponding to the plurality of triangular marks that form the display pattern P. On the other hand, a light-shielding layer 39 covering the outer side of the contour of each triangular mark is provided on the first emission surface 36a. Apart from this, it has a structure that is basically the same as the vehicle display device 1 described above.

[0097] In the vehicle display device 1B with the above structure, each display pattern P is positively displayed by red light emission in the display light emission section E1. As a taillight (TLL) of the vehicle lamp 100, the linear light emission section E2 extending from the center in the vehicle width direction toward both sides in the vehicle width direction can emit red light in a linear shape, and the multiple triangular marks that become the display pattern P emit red light in the display light emission section E3.

[0098] Furthermore, regarding the structure of the light guide 3 on the incident portion 33 side of the light guide 3 in the aforementioned vehicle display device 1, it can be configured, for example, as follows: Figure 13 The structures shown in parts (A) to (B) are as follows.

[0099] in, Figure 13 The first light guide portion 31 shown in part (A) has a shape in which the two side portions 31b and the incident portion 33 are bent by the bending portion 31d. As a result, the configuration of the light source 2 can be changed arbitrarily.

[0100] on the other hand, Figure 13 The first light guide portion 31 shown in part (B) has a shape in which the two side portions 31b and the incident portion 33 are bent through the inclined reflective surface 31e. This allows for arbitrary changes to the arrangement of the light source 2. Furthermore, the light L incident from the incident surface 33a, after being reflected by the inclined reflective surface 31e, is guided from the two side portions 31b of the first light guide portion 31 to the central portion 31a via the bent portion 31c.

[0101] The incident portion 33 has a lens shape that replaces the flat (planar) incident surface 33a described above, so that the light L emitted radially from the light source 2 converges toward the optical axis and is incident into the interior of the first light guide portion 31.

[0102] Specifically, the incident portion 33 has: a first focusing incident surface 33b, which is located at the center of the portion opposite to the light source 2, for a portion of the light L emitted from the light source 2 to be incident; a second focusing incident surface 33c, which is located on the inner periphery of a protrusion that protrudes from a position surrounding the first focusing incident surface 33b toward the light source 2, for a portion of the light L emitted from the light source 2 to be incident; and a focusing reflective surface 33d, which is located on the outer periphery of the protrusion, for reflecting the light L incident from the second focusing incident surface 33c.

[0103] In the incident section 33, the light L emitted radially from the light source 2, which enters the interior of the first light guide section 31 from the first focusing incident surface 33b, is focused towards the vicinity of the optical axis. On the other hand, the light L that enters the interior of the first light guide section 31 from the second focusing incident surface 33c is reflected by the focusing reflective surface 33d, causing it to focus towards the vicinity of the optical axis. Thus, the light L emitted radially from the light source 2 can be focused towards the vicinity of the optical axis while simultaneously entering the interior of the first light guide section 31.

[0104] on the other hand, Figure 13 The first light guide portion 31 shown in part (C) has a shape in which it branches off from the position opposite to the incident portion 33 via the branch portion 31f in opposite directions. Thus, it is possible to configure a plurality of first light guide portions 31 to be connected via the branch portion 31f.

[0105] Furthermore, in the above embodiments, the present invention was exemplified as being applied to the vehicle display device 1 mounted on the rear side of the vehicle, but the present invention can also be applied to a vehicle display device mounted on the front side of the vehicle.

[0106] Specifically, the present invention can be applied to vehicle display devices, which include: a display light-emitting unit E1 mounted on the front side of a vehicle B, located in the center of the vehicle width direction, which emits white light as a display pattern P for brand names such as vehicle name and manufacturer name, logos, etc.; and a pair of linear light-emitting units E2, which emit white light in a linear shape as vehicle width lights (position lights) or daytime running lights (DRL) of vehicle lighting fixtures.

[0107] Label Explanation

[0108] 1, 1A, 1B: Vehicle display device; 2: Light source; 3: Light guide; 31: First light guide section; 31a: Central section; 31b: Side sections; 31c: Curved section; 31d: Curved section; 31e: Inclined reflective surface; 31f: Branch section; 32, 32A: Second light guide section; 33: Incident section; 34: First reflective cutting structure; 35: Second reflective cutting structure; 36: First exit section; 37: Third reflective cutting structure; 38: Second exit section; 39: Light shielding layer; 40a: Light guide exit surface; 40b: Light guide incident surface; 100: Vehicle lamp; TLL: Taillight; E1: Display light-emitting section; E2: Linear light-emitting section; E3: Display light-emitting section; P: Display pattern; L: Light.

Claims

1. A display device for a vehicle, characterized in that, The vehicle display device includes a light source and a light guide. The light guide has: A rod-shaped first light guide extends from one end opposite to the light source toward the other end. The plate-shaped second light guide is located between one end and the other end of the first light guide, and protrudes toward the side that intersects with the extending direction of the first light guide; An incident portion is located at at least one end of the first light guide portion, so that light emitted from the light source is incident into the interior of the first light guide portion; Multiple first reflective cut structures are located on the side opposite to the protruding side of the second light guide of the first light guide, and a portion of the light guided inside the first light guide is reflected toward the second light guide; Multiple second reflective cut structures are located on the back side of the second light guide portion, which reflect light guided inside the second light guide portion toward the front side of the second light guide portion; as well as The display light-emitting part is located on the front side of the second light guide part. It emits light from the front side of the second light guide part to the outside by means of light reflected by the plurality of second reflective cutting structures, thereby emitting light in a shape corresponding to the display pattern formed by the plurality of second reflective cutting structures.

2. The vehicle display device according to claim 1, characterized in that, The light guide has: Multiple third reflective cut structures are located on the back side of the first light guide, which reflect light guided inside the first light guide toward the front side of the first light guide; as well as The linear light-emitting part, located on the front side of the first light guide part, emits light reflected by the plurality of third reflective cutting structures from the front side of the first light guide part to the outside, thereby emitting light in a linear shape.

3. The vehicle display device according to claim 1, characterized in that, The display light-emitting part is formed by arranging multiple display patterns on the second light guide part along the extending direction of the first light guide part.

4. The vehicle display device according to claim 1, characterized in that, The second light guide portion has: a plurality of connecting portions connected to the first light guide portion; and a slit portion forming a space between adjacent connecting portions of the plurality of connecting portions.

5. The vehicle display device according to claim 4, characterized in that, The plurality of first reflective cutting structures are disposed on each portion opposite to the plurality of connecting portions.

6. The vehicle display device according to claim 4, characterized in that, The connecting part is configured to connect the two ends of the first light guide part and the second light guide part. The first light guide portion has a light-guiding exit surface located on the side opposite to the space. The second light guide portion has a light guide incident surface located on the side opposite to the space. Light emitted from the light guide exit surface toward the space is incident on the interior of the second light guide portion from the light guide incident surface.

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