Lighting display device

Abstract

To improve the utilization efficiency of light source light while preventing mixing of light from adjacent light sources in a lighting display device for vehicles that has a plurality of light sources.SOLUTION: A lighting display device 1 comprises: a light source unit 10 having a plurality of light-emitting light sources 11 arranged at a prescribed interval; an inner lens unit 20 formed by a plurality of inner lenses 21 which are interconnected via a connection part 22 in the vicinity of a light emission plane 24, the inner lenses being composed of a light incidence plane 23 provided facing each light-emitting light source 11 and facing the light-emitting light source 11, a light emission plane 24 for emitting light, and a light guide part 25 located between the light incidence plane 23 and the light emission plane 24, for guiding light entered from the light incidence plane 23 toward the light emission plane 24, which are all arranged along the optical axis; and a light shielding member unit 30 composed of an integrally constituted plurality of shades 32 partitioning between each light guide part 25. The light shielding member unit 30 is formed using a resin sheet the surface of which has light reflection characteristic and which is composed of a foam layer that contains minute bubbles in the inside.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to lighting and display devices, and more particularly to lighting and display devices for vehicles. [Background technology]

[0002] In recent years, in addition to ordinary vehicle lighting fixtures such as headlamps, daytime running lamps, turn signal lamps, tail lamps, and stop lamps, there has been a growing need for lighting and display devices that can display various patterns and information to enable interaction between drivers and pedestrians, and between vehicles and pedestrians.

[0003] Patent document 1 discloses an illumination display device that comprises a light source unit having a plurality of light-emitting sources arranged in a matrix, and an inner lens unit (projection lens module) formed by connecting a plurality of inner lenses (projection lenses) provided corresponding to each light-emitting source, and that is capable of displaying various information in pixels.

[0004] The inner lens of Patent Document 1 is provided with a shade (light-shielding rib) to prevent light from the light source from entering the projection lens of an adjacent pixel, in order to prevent color mixing of light between adjacent pixels. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2021-531629 Summary of the Invention [Problem to be solved by the invention]

[0006] The shade disclosed in Patent Document 1 includes a base made of a transparent material and a light-blocking layer formed by black paint sprayed onto the surface of the base, as described in paragraph 0030. However, a shade made of black paint has the problem that light is absorbed, resulting in low utilization efficiency of light from the light source.

[0007] The present invention has been made in consideration of the above circumstances, and aims to provide a technology for improving the utilization efficiency of light from a light source while preventing color mixing of light from adjacent light sources in a vehicle lighting display device having multiple light sources. [Means for solving the problem]

[0008] In order to achieve the above object, an illumination display device according to one aspect of the present invention has the following configuration.

[0009] 1. A light source unit having a plurality of light-emitting sources arranged at a predetermined interval; an inner lens unit having a light incident surface facing the light-emitting light source, a light exit surface for emitting light, and a light guide portion arranged between the light incident surface and the light exit surface for guiding the light incident from the light incident surface toward the light exit surface, the inner lens unit being formed by connecting a plurality of inner lenses arranged along an optical axis via a connecting portion near the light exit surface; and a light-shielding member unit having a plurality of shades integrally formed to separate the light guide portions; the light-shielding member unit being formed using a resin sheet having a surface with light-reflecting properties and made up of a foam layer containing fine air bubbles inside.

[0010] 2. In the above aspect 1, it is also preferable that the resin sheet is made of a thermoplastic resin, and that its optical properties for visible light with a wavelength of 450 to 650 nm are such that, when barium sulfate at a wavelength of 550 nm is taken as 100%, the total reflectance is 90% or more and the diffuse reflectance is 90% or more.

[0011] 3. In the above aspects 1 and 2, it is also preferable that the light-shielding member unit is formed from one of the resin sheets.

[0012] 4. In the above aspects 1 to 3, it is also preferable that each light-guiding portion protrudes from the connecting portion toward the light incident surface while reducing in diameter, and that the shade is formed as a bowl-shaped recess at a position corresponding to each light-guiding portion, so as to surround at least a part of the light incident surface side region of each light-guiding portion with a space therebetween, and that an opening facing the light source is formed at the bottom of the recess facing the light incident surface, and that the inner surface of the recess is configured to reflect light from the light-emitting source and emit it forward.

[0013] 5. In the above aspects 1 to 3, it is also preferable that each light-guiding portion protrudes from the connecting portion toward the light incident surface while reducing in diameter, that the shade is formed as an inverted truncated cone-shaped recess at a position corresponding to each light-guiding portion so as to cover at least a portion of the light incident surface side region of each light-guiding portion, and that an opening facing the light source is formed at the bottom of the recess facing the light incident surface. [Effects of the Invention]

[0014] According to the above aspect, in a vehicle lighting display device having a plurality of light sources, it is possible to provide a technique for improving the utilization efficiency of light from the light sources while preventing color mixing of light from adjacent light sources. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a front perspective view of a vehicle equipped with an illumination display device according to a first embodiment. [Figure 2] FIG. 2 is an exploded perspective view of a lighting unit that constitutes the illumination display device. [Figure 3] 1A is a cross-sectional view of the lamp unit, and FIG. 1B is an enlarged schematic view illustrating the structure of a light blocking member unit that constitutes the lamp unit. [Figure 4] 3A to 3C are diagrams illustrating the optical principle of the illumination display device. [Figure 5] 10A and 10B are diagrams illustrating an example of an application example. [Figure 6]FIG. 10 is a diagram showing another example of a display image. [Figure 7] 10A to 10C are diagrams illustrating a method for manufacturing the light-shielding member unit. [Figure 8] FIG. 10 is a cross-sectional view of a lighting unit of an illumination display device according to a modified example of the embodiment. [Figure 9] 10(A) is a cross-sectional view of a lighting unit of an illumination display device according to a second embodiment, and FIG. 10(B) is a cross-sectional view of a lighting unit of an illumination display device according to a third embodiment. [Figure 10] 10A to 10C are diagrams illustrating a method for manufacturing a lamp unit according to a second embodiment. [Figure 11] 10A to 10C are diagrams illustrating a manufacturing method of the lamp unit according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Preferred embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited thereto. In the following description, unless otherwise specified, directions such as "front," "rear," "right," and "left" refer to directions when facing the lighting display device, with the optical axis direction of the lighting display device being the forward direction. However, these terms are used merely to make the present embodiment easier to clearly explain and do not limit the present invention. Furthermore, the dimensions of each component are shown enlarged or reduced as appropriate for convenience of explanation and do not necessarily reflect the actual dimensions.

[0017] In the following description of the embodiments and modifications, the same components are denoted by the same reference numerals, and duplicate descriptions are omitted where appropriate. In addition, when a single drawing includes a plurality of identical components, some reference numerals are omitted where appropriate.

[0018] First embodiment Fig. 1 is a front perspective view of a vehicle CAR in which a lighting display device 1 according to a first embodiment is applied as a grill lamp attached to the top of the grill. Fig. 2 is an exploded perspective view showing the structure of a lamp unit 100 constituting the lighting display device 1. Fig. 3 is a cross-sectional view of the lamp unit 100. Fig. 4 is a cross-sectional view illustrating the optical principle of the lamp unit 100, with hatching omitted.

[0019] The lighting display device 1 is applied as a grill lamp provided at the top of the front grill of a vehicle CAR. In Fig. 1, the lighting display device 1 displays an emblem.

[0020] The lighting display device 1 is configured such that the following lighting unit 100 is arranged with the optical axis direction toward the front within a lamp chamber defined by a container-shaped housing (not shown) that is open at the front and a plain front cover (not shown) that closes the opening of the housing.

[0021] The lamp unit 100 generally includes a light source unit 10, an inner lens unit 20, and a light blocking member unit 30.

[0022] The light source unit 10 is configured by arranging a plurality of light emitting sources 12 in a matrix at predetermined intervals on a substrate 11. The light emitting sources 12 are, for example, light emitting diodes (LEDs). Each light emitting source 12 is configured so that it can be turned on and off independently of the others by an illumination control unit (not shown) configured by an electronic circuit or the like. The light emitting sources 12 may be LEDs of the same color or may be LEDs of different colors.

[0023] The inner lens unit 20 is integrally formed by connecting a plurality of inner lenses 21 arranged at predetermined intervals in a matrix corresponding to the light emitting sources 12 with flat connecting portions 22. The inner lens unit 20 is an injection-molded product made of a light-transmitting material such as organosilicon, acrylic resin such as polycarbonate resin (PC) or polymethyl methacrylate resin (PMMA), silicone resin, or glass. Each inner lens 21 has a cylindrical shape as a whole, with its rear end surface serving as a light incident surface 23 directly facing the light emitting source 12 and its front end surface serving as a light exit surface 24 facing forward.

[0024] Between the light incident surface 23 and the light exit surface 24 is a light guide section 25 that guides light incident from the light incident surface 23 toward the light exit surface 24. The light incident surface 23, the light guide section 25, and the light exit surface 24 are arranged along the optical axis. The multiple inner lenses 21 are connected to the light incident surface 23 via connecting sections 22 that are arranged near the light exit surface 24. The diameter of the light guide section 25 tapers from the connecting sections 22 toward the light incident surface 23, so that it has a substantially conical shape. Furthermore, the diameter of the light guide section 25 tapers slightly from the connecting sections 22 toward the light exit surface 24. This allows for demolding during injection molding.

[0025] The light-shielding member unit 30 is made of a single resin sheet, as will be described later. The light-shielding member unit 30 has bowl-shaped recesses 32 formed therein that protrude rearward, corresponding to the positions of the light-emitting sources 12 arranged in a matrix. An opening 31 corresponding to the light-emitting source 12 is formed at the bottom of the recesses 32. The light-shielding member unit 30 has a plurality of recesses 32 that are integrally formed via a light-shielding connecting portion 33 that is aligned with the connecting portion 22 of the inner lens unit 20.

[0026] As shown schematically in Fig. 3(B), the light-shielding member unit 30 is made of a micro-foamed resin sheet (hereinafter referred to as a foamed resin sheet) in which a non-foamed layer 35 is formed on the surface of a foamed layer 34 containing numerous fine bubbles 34a. The average bubble diameter in the foamed layer 34 is preferably in the range of 0.2 to 40 µm. If the average bubble diameter is too small, the light transmittance increases and the reflectance decreases. This is because if the average bubble diameter is too large, the diffuse reflectance decreases.

[0027] The foamed resin sheet has a surface with light reflecting properties. Specifically, the foamed resin sheet has optical properties for visible light with wavelengths of 450 to 650 nm, where a barium sulfate standard at a wavelength of 550 nm is taken as 100%, such that the total reflectance is 90% or more and the diffuse reflectance is 90% or more. Furthermore, the wavelength dependency of the reflectance is within a range of 1% or less. It is particularly advantageous if the total reflectance and diffuse reflectance are both 95% or more.

[0028] The foamed resin sheet is preferably made of a thermoplastic resin such as a finely bubbled PET (polyethylene terephthalate) resin, a PC (polycarbonate) resin, a flame-retardant PC resin, or an acrylic resin. In addition to the above, a transparent resin obtained by imparting flame retardancy to an acrylic resin such as a cycloolefin polymer or polyacrylonitrile may also be used for the foamed resin sheet. Such foamed resin sheets are available on the market, for example, under the trademark MCPET (Furukawa Electric Co., Ltd.), without limitation.

[0029] 3(A), the light source unit 10, the inner lens unit 20, and the light blocking member unit 30 are arranged so that the corresponding light emitting sources 12 and inner lenses 21 share an optical axis. One light emitting source 12, the corresponding inner lens 21, and the corresponding recess (shade) 32 form one pixel. The recess 32 is formed to surround the rear region (light incident surface side region) 25a of the light guiding section 25 of the inner lens 21 with a space therebetween.

[0030] Therefore, as shown in Figure 4, the light emitted from the light-emitting source 12 passes through the opening 31 of the light-shielding member unit 30, enters the inner lens 21 from the light incident surface 23 of the inner lens 21, is internally reflected within the light-guiding section 25, and is emitted from the light exit surface 24 to the front of the lighting display device 1.

[0031] Of the light emitted from the light emitting source 12, light L2 that does not enter the inner lens 21 travels outward from the inner lens 21. However, it is reflected by the inner surface 32a of the recess 32 and is emitted forward of the lighting display device 1 from the connecting portion 22 of the inner lens unit 20. That is, the inner surface 32a of the bowl-shaped recess 32 is designed with a slope such that it directly reflects light that is emitted from the light emitting source 12 but does not enter the light guiding portion 25, and emits it forward of the lighting display device 1 via the connecting portion 22. Although not shown in the figure, even light that has once entered the inner lens 21 will leak to the outside of the light guiding portion. The inner surface 32a of the bowl-shaped recess 32 also reflects such light and emits it forward of the lighting display device 1.

[0032] If the light-shielding member unit 30 is not provided, the light will leak into the adjacent pixel, causing color mixing, as shown by the dotted line. In this way, the recess 32 functions as a shade that separates the light guide sections 25.

[0033] As a result, in the illumination display device 1, the light guided through the light guide section 25 is emitted from the light exit surface 24, causing the light exit surface 24 of the inner lens 21 to shine brightly. Furthermore, the light reflected by the inner surface 32a of the recess 32 causes the outer peripheral edge 26 (FIG. 5) of the light exit surface 24 within the same pixel to shine slightly weakly. On the other hand, the adjacent pixel does not shine brightly. In the enlarged view of FIG. 5, this is shown by using darker colors for the brightly lit areas and lighter colors for the less brightly lit areas.

[0034] 5 and 6 show examples of displays by the lighting display device 1 configured as described above. Fig. 5 displays an emblem 41, and Fig. 6 displays a message to the surroundings such as "BABY IN CAR." In this way, the lighting display device 1 according to the embodiment is configured so that the on / off of the light emitting source 12 in each pixel can be controlled independently, making it possible to display a variety of information, images, etc.

[0035] For example, when the lighting display device 1 is applied as a grill lamp, the emblem shown in FIG. 5 may be kept lit while the vehicle is moving, and when the vehicle is stopped, the emblem may be switched to a message such as "WELCOME" so that the device operates as a welcome lamp mode.

[0036] In addition, when the vehicle operates in welcome lamp mode while stopped, the image may be animated by moving it, rather than just a static image. Also, the light source 12 may be configured with LEDs of three colors (red, blue, and green) instead of a single color LED, and the image may be displayed in color.

[0037] Technical effects In this embodiment, the light-shielding member unit 30 is made of a foamed resin sheet having light-reflecting properties, and is formed with a bowl-shaped recess 32 that functions as a shade, thereby preventing the mixing of light from adjacent light-emitting sources 12 in adjacent pixels. Furthermore, the light-shielding member unit 30 is not made of a black resin molded product, but of a foamed resin sheet having reflective properties that reflect light on its surface. As a result, light is not absorbed, and light utilization efficiency is improved compared to when a conventional light-shielding member unit made of a black resin molded product is used.

[0038] Furthermore, since the foam resin sheet contains many fine bubbles inside and is therefore lightweight, it can be made much lighter than a light-blocking member unit made as a conventional resin injection-molded product, thereby realizing a lightweight lighting display device 1. The resin sheet 50 is very thin, at 0.5 to 1 mm thick. If the shape of the light-blocking member unit 30 were to be realized using a conventional injection-molded product, it would be difficult to achieve a similarly thin shape due to issues such as the fluidity of the resin, and in this respect, too, the use of a foam resin sheet contributes to weight reduction.

[0039] In this embodiment, the recess 32 of the light-blocking member unit 30, which functions as a shade, is formed in a bowl shape that surrounds at least a portion of the light-incident surface side region of the light guide 25, with a space therebetween. As a result, the inner surface 32a of the recess 32 reflects light from the light-emitting source 12 and emits it toward the front of the lighting display device 1 via the connecting portion 22 of the inner lens unit 20, so that the outer periphery of the light-exit surface 24, which is illuminated by the light guided through the light guide 25, can also be illuminated. This increases the light-emitting area per pixel without increasing the volume of the lens. This also contributes to reducing the weight and cost of the lighting display device 1.

[0040] Manufacturing method of light-shielding member unit Here, a method for manufacturing the light shielding member unit 30 will be described with reference to Fig. 7. The light shielding member unit 30 is formed from one resin sheet 50.

[0041] In this method, first, a resin sheet 50 is prepared (STEP 01). Next, the resin sheet 50 is heated and softened, and then placed on a mold 52 (STEP 02). Next, suction is applied from the mold side to bring the resin sheet 50 into close contact with the mold 52 (STEP 03). Next, the molded resin sheet 50 is released from the mold, and holes 51 corresponding to the openings 31 are formed by trimming (STEP 04). The molded product is then formed into the light-shielding member unit 30 (STEP 05). Alternatively, holes 51 corresponding to the openings 31 may be formed in the resin sheet 50 using a punch or the like, and then the resin sheet 50 may be heated and softened, and then the resin sheet 50 may be molded by bringing the resin sheet into close contact with the mold 52 by suction.

[0042] The light-shielding member unit 30 may be manufactured from the resin sheet 50 by vacuum pressure bonding as described above, or may be manufactured by pressure molding or heat press molding. In this way, if the light-shielding member unit 30 is formed from a single resin sheet 50, the manufacturing is easy and handling during the manufacturing process is easy.

[0043] Variation 1 Fig. 8 is a cross-sectional view corresponding to Fig. 3(A) of a lighting unit 100A of an illumination display device 1A according to one modification of the first embodiment. Fig. 8 illustrates the optical principle using the top inner lens 21. The illumination display device 1A has roughly the same configuration as the illumination display device 1, but differs in the following respects.

[0044] Specifically, light-shielding member unit 30A does not have a bowl-shaped recess 32 that is convex outward, but has an inverted truncated cone-shaped recess 32A that fits along the rear part of light-guiding section 25. Also, depth D2 of recess 32A is set smaller than depth D1 of recess 32 shown in Fig. 3(A) (i.e., the length surrounding rear part (light incident surface side region) 25a of light-guiding section 25 is shorter).

[0045] The lighting display device 1A uses a resin sheet having reflective properties, and therefore can be made lighter, similar to the lighting display device 1 according to the above embodiment. Furthermore, the inner wall of the recess 32A has reflective properties and is configured to emit reflected light from the light exit surface 24, so the light utilization efficiency is also equivalent to that of the lighting display device 1 according to the first embodiment.

[0046] When resin sheet 50 is formed by vacuum forming or pressure forming, it may be difficult to form a complex shape, but since the depth of recess 32A is about half the amount of protrusion from connecting portion 22A of light-guiding portion 25, difficulties during forming are avoided.

[0047] Incidentally, the emission of light that is guided through light guiding section 25 and enters light guiding section 25 or connecting section 22A of an adjacent pixel often occurs near the rear end of light guiding section 25, i.e., near light incident surface 23. For this reason, even if recess 32A is shallow, as long as light blocking member unit 30A extends forward from the rear end of the light guiding section to an extent that prevents the emission of light that is at least incident on light guiding section 25 or connecting section 22A of an adjacent pixel, it is possible to achieve the technical effect unique to the present invention of improving the utilization efficiency of light from the light source while preventing color mixing of light from adjacent light sources.

[0048] Furthermore, in the lighting display device 1A, by concentrating the light emitted forward on the light exit surface 24 of the inner lens 21, the light exit surface 24 shines, but the connecting portion 22 around its periphery does not shine. This makes the circular shape of the light exit surface 24 stand out, making it possible to provide a light-emitting state with a design effect different from that of the lighting display device 1A.

[0049] Second embodiment Fig. 9(A) is a cross-sectional view of a lighting unit 200 of an illumination display device 201 according to the second embodiment, corresponding to Fig. 3(A). In Fig. 9(A), the optical principle is explained using the top inner lens 21.

[0050] Except for the light blocking member unit 230, the illumination display device 201 has the same configuration as the illumination display device 1A according to the modified example of the first embodiment.

[0051] Before describing the shape of the light blocking member unit 230, a method for manufacturing the light blocking member unit 230 will be described with reference to FIG.

[0052] The light blocking member unit 230 is manufactured by cutting and bending the resin sheet 50 .

[0053] First, a resin sheet 50 made of the same material as the light-shielding member unit 30 according to the first embodiment is prepared and cut into strip-shaped pieces 53, for example, with a length in the left-right direction of the inner lens unit 20A (STEP 11). The number of strip-shaped pieces 53 to be created is one less than the number of pixels in the up-down direction of the inner lens unit 20A. Next, circular openings 53a are formed in the strip-shaped pieces 53 by punching or the like at intervals corresponding to the spacing between the pixels (STEP 12).

[0054] Another resin sheet 50 is prepared (STEP 13) and cut into strip-shaped pieces 54, each having one side the length of the light-shielding member unit 230 in the front-rear direction and an adjacent side the length of which corresponds to the circumference of the opening 53a of the strip-shaped piece 53. The same number of strip-shaped pieces 54 as the number of openings 53a of the strip-shaped piece 53 are created (STEP 14). Next, the strip-shaped pieces 54 are bent into cylindrical shapes and fixed with an adhesive or the like (STEP 15). The cylindrical pieces 54a formed in this way are inserted into the openings 53a of the strip-shaped piece 53 and fixed with an adhesive or the like (STEP 16). These pieces are arranged vertically in a manner equal to the number of vertical pixels of the inner lens unit 20A to form the light-shielding member unit 230.

[0055] 9(A), inner lens unit 20A is inserted into cylindrical portion 232 of formed light blocking member unit 230, where the portion protruding rearward from connecting portion 22A of each light guide portion 25 corresponds to cylindrical piece 54a, and light blocking member unit 230 is fixed between light source unit 10 and inner lens unit 20A, thereby forming lamp unit 200. Light source unit 10 and inner lens unit 20A are arranged so that their optical axes are the same.

[0056] As a result, in the lighting unit 200, the peripheral wall 232a of the cylindrical portion 232 extends parallel to the optical axis of the light source 12 and is connected by a connecting portion 233 (the connecting portion 233 corresponds to the strip-shaped piece 53) that is perpendicular to the cylindrical portion 232.

[0057] When the light emitting source 12 is turned on, light from the light emitting source 12 enters the light incident surface 23 of the inner lens 21, is guided inside the light guiding section, and is emitted forward from the light exit surface 24. At this time, part of the light from the light emitting source 12 enters the peripheral wall 232a of the cylindrical section 232 directly or via the light guiding section, but is reflected by the reflective properties of the resin sheet 50 and is emitted forward from the exit surface. This prevents light from mixing between adjacent pixels.

[0058] That is, the peripheral wall 232a serves as a shade. Furthermore, light incident on the peripheral wall 232a is not absorbed by the peripheral wall 232a but is reflected and emitted forward from the lighting display device 201, improving the light utilization efficiency. Furthermore, as described above, the resin sheet 50 has a foam layer containing many fine bubbles therein and is configured to be thin. Therefore, the light-blocking member unit 230 is lighter than conventional resin molded products, and as a result, the lighting display device 201 can be made lighter.

[0059] As described above, the lighting display device 201 according to the second embodiment can also achieve the technical effect unique to the present invention of improving the utilization efficiency of light from the light source while preventing color mixing of light from adjacent light sources.

[0060] Third embodiment 9(B) is a cross-sectional view corresponding to FIG. 3(A) of the lighting unit 300 of the illumination display device 301 according to the third embodiment. The optical principle is explained using the uppermost inner lens 21.

[0061] The lighting display device 301 has the same configuration as the lighting display device 1A according to the modified example of the first embodiment, except for the light blocking member unit 330. For ease of understanding, before describing the configuration of the light blocking member unit 330, a method for manufacturing the same will be described with reference to FIG.

[0062] The light blocking member unit 330 is manufactured by cutting a resin sheet 50 .

[0063] First, a resin sheet 50 made of the same material as the light-shielding member unit 30 according to the first embodiment is prepared and cut into strip-shaped pieces 55 having a length in the left-right direction of the inner lens unit 20A (STEP 21). The number of strip-shaped pieces 55 to be created is one less than the number of pixels in the up-down direction of the inner lens unit 20A. Next, cuts 55a corresponding to the thickness of the resin sheet 50 are formed in the strip-shaped pieces 55 at intervals corresponding to the size of the pixels (STEP 22).

[0064] Separately, an identical resin sheet 50 is prepared and cut into strip-shaped pieces 56 having the vertical length of the inner lens unit 20A (STEP 23). The number of strip-shaped pieces 56 to be created is one less than the number of pixels in the horizontal direction of the inner lens unit 20A. Next, cuts 56a corresponding to the thickness of the resin sheet 50 are formed in the strip-shaped pieces 56 at intervals corresponding to the size of the pixels (STEP 25).

[0065] The strip pieces 55 and 56 are combined in a grid pattern to form a light blocking member unit 330.

[0066] 9(B), inner lens unit 20A is inserted into the internal space of each lattice from the portion protruding rearward from connecting portion 22A of each light guide portion 25 into light blocking member unit 330 configured in this manner, and light blocking member unit 330 is fixed between light source unit 10 and inner lens unit 20A, thereby configuring lamp unit 300. Light source unit 10 and inner lens unit 20A are arranged so that their optical axes are the same.

[0067] As a result, in the lighting unit 300 , the peripheral wall 332 a of the lattice 332 extends parallel to the optical axis of the light source 12 .

[0068] When the light emitting source 12 is turned on, light from the light emitting source 12 enters the light incident surface 23 of the inner lens 21, is guided inside the light guiding section, and is emitted forward from the light exit surface 24. At this time, part of the light from the light emitting source 12 enters the peripheral wall 332a of the lattice 332 directly or via the light guiding section, but is reflected by the reflective properties of the resin sheet 50 and is emitted forward from the light exit surface 24. This prevents light from mixing between adjacent pixels.

[0069] That is, the peripheral wall 332a serves as a shade. Furthermore, light incident on the peripheral wall 332a is not absorbed by the peripheral wall 332a due to its high reflectivity, but is reflected and emitted forward from the lighting display device 301, thereby improving the light utilization efficiency. Furthermore, as described above, the resin sheet 50 has a foam layer containing many fine bubbles therein and is configured to be thin. Therefore, the light-shielding member unit 330 is lighter in weight than conventional resin molded products.

[0070] As described above, the lighting display device 301 according to the third embodiment can also achieve the technical effect unique to the present invention of improving the utilization efficiency of light from the light source while preventing color mixing of light from adjacent light sources.

[0071] The above describes a preferred embodiment of the present invention, with reference to an example in which the present invention is applied to a grill lamp having a welcome lamp display mode. However, these are merely examples, and the present invention can be applied to various lighting display devices used as vehicle lighting fixtures such as grill lamps, daytime running lights, tail lamps, etc. [Explanation of symbols]

[0072] 1,1A,201 301: Lighting display device 10: Light source unit 12: Light source 20, 20A: Inner lens unit 21: Inner lens 22,22A: Connection part 23: Light incidence surface 24:Light exit surface 25: Light guide section 30, 30A, 230, 330: Light blocking member unit 31 :Aperture 32: Recess (shade) 32A: Recess (shade) 34: Foam layer 34a: Fine bubbles 50: Resin sheet 232: Cylindrical part (shade) 233 :Connection part

Claims

1. a light source unit having a plurality of light emitting sources arranged at predetermined intervals; an inner lens unit including a plurality of inner lenses arranged along an optical axis, each of which includes a light incident surface facing the light emitting light source, a light exit surface for emitting light, and a light guide portion arranged between the light incident surface and the light exit surface for guiding the light incident from the light incident surface toward the light exit surface, and which are connected via a connecting portion near the light exit surface; and a light-shielding member unit formed by integrally configuring a plurality of shades that separate the light guide sections; The light-shielding member unit is formed using a resin sheet having a surface with light-reflecting properties and a foam layer containing fine bubbles therein. Lighting display device.

2. The lighting display device according to claim 1, wherein the resin sheet is made of a thermoplastic resin, and has optical properties with respect to visible light having a wavelength of 450 to 650 nm, where the total reflectance is 90% or more and the diffuse reflectance is 90% or more, when the reflectance of barium sulfate at a wavelength of 550 nm is taken as 100%.

3. 3. The illumination display device according to claim 1, wherein the light blocking member unit is formed from one of the resin sheets.

4. Each light guide portion protrudes from the connecting portion toward the light incident surface while decreasing in diameter, the shade is formed as a bowl-shaped recess at a position corresponding to each light guide section so as to surround at least a part of a light incident surface side region of each light guide section with a space therebetween, and an opening facing the light source is formed at a bottom of the recess facing the light incident surface, 4. The illumination display device according to claim 3, wherein the inner surface of the recess is configured to reflect light from the light source and emit it forward.

5. Each light guide portion protrudes from the connecting portion toward the light incident surface while decreasing in diameter, the shade is formed as an inverted truncated cone-shaped recess at a position corresponding to each light guide section so as to cover at least a part of a light incident surface side region of each light guide section, 4. The illumination display device according to claim 3, wherein an opening facing the light source is formed in a bottom of the recess facing the light incident surface.

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