JP2018018706A - Luminaire and headup display device - Google Patents

Abstract

[Object] To provide a lighting device capable of reducing power consumption and cost and saving space. A plurality of light sources arranged in a two-dimensional matrix and emitting illumination light in one direction of the surface, and a plurality of convex lens portions corresponding to each of the plurality of light sources are provided. A condensing lens 20 disposed on the exit surface side of the plurality of light sources 10, the convergence lens 20 condensing the illumination light L1 emitted from the corresponding light source 10, and a plurality of convex lens portions 22 A plurality of bulging light-emitting surfaces 32 corresponding to each of the bulging light-emitting surfaces 32, each of which illuminates from the adjacent plurality of convex lens portions so that each of the illuminating lights L3 is a non-overlapping parallel light; A collimator lens array 30 disposed on the exit surface side of the optical lens 20; [Selection diagram] FIG.

Description

  The present invention relates to a lighting device including a plurality of light sources and a head-up display device including the lighting device.

  Conventionally, a display original image formed by transmitting illumination light through a projection member such as a transmissive liquid crystal panel (LCD) is enlarged by a predetermined optical system, and a display image is shaped. A head-up display device (hereinafter also referred to as a HUD device) that projects and displays on a display member such as a windshield of a moving body (for example, a vehicle) is known. The HUD device is a device that is mounted on a vehicle such as an automobile and displays the display image in the field of view of the driver or passenger who is an observer during driving. The projection member displays the flat LCD data of the display original image. The original display image is optically emitted by transmitting the illumination light therethrough. On the transparent (or translucent) display member such as a display made of a half mirror called a vehicle windshield or combiner, a display image of character information such as vehicle speed or image information such as a navigation image is displayed. The image is projected, and the scenery in front of the vehicle and the display image are superimposed and recognized by the driver. In the head-up display, the display image is formed at a point at infinity, so when the driver switches the viewpoint from the outside world to the display image, a physiological phenomenon that takes about several seconds of commas and refocuses occurs. There are no advantages. In recent years, the demand for the HUD device, which is a display that allows the driver to visually recognize the driver without refocusing during driving, has been increasing.

Therefore, for example, the following conventional HUD illumination device is known.
1. Two stages of condensing lenses having a plurality of convex portions corresponding to LEDs that are a plurality of light sources, and the effective diameter of the condensing lens in the second stage farther from the LEDs is adjusted by adjusting the light imaging position. An illumination unit that can achieve a large display area while reducing the focal length and achieving high illumination efficiency (Patent Document 1).
2. By using a light source that is aligned with the lens optical axis of a condensing lens that has multiple convex parts and a light source that is decentered from the optical axis, the deviation of the imaging position is suppressed and the luminance unevenness of the virtual image is reduced. Lighting unit (Patent Document 2).

3. It includes a plurality of LEDs that are light sources, a lens array that collects light emitted from the light sources, and a field lens that adjusts the direction of the light, and the field lens has a diffusion region in at least a partial region on the incident surface side. Then, by transmitting the overlapping light from the field lens (light of the portion where the adjacent incident light overlaps) to the diffusion region, this uneven light is diffused and the brightness unevenness in which a bright line (bright line) is generated. (Patent Document 3).
4). A lens array having a plurality of convex lenses corresponding to a plurality of light sources is provided, and at least a part of a boundary line that is a valley formed between adjacent convex lenses is formed into a concavo-convex shape, whereby the luminance of light emitted from the boundary line is increased. An illuminating device in which luminance unevenness in which dark lines are generated by averaging is reduced (Patent Document 4).

Japanese Patent Laying-Open No. 2015-232608 Japanese Patent Laying-Open No. 2015-232943 Japanese Patent Laying-Open No. 2015-219425 Japanese Patent No. 4952762

  A backlight including an illuminating device that emits illuminating light in the HUD device includes a light source including, for example, a plurality of LEDs, whereby the luminance of the entire device can be improved. However, as shown in FIG. 15A, depending on the arrangement of the plurality of LED light sources 10 ... 10, illumination light L3 emitted from one LED light source 10 and illumination emitted from another adjacent LED light source 10 are used. The light L3 overlaps as shown by a broken line ellipse AA in the figure (the light in the overlapped portion is called overlapping light). In this case, since the region where the illumination light L3 overlaps becomes brighter than the other regions, luminance unevenness (so-called bright line) is visually recognized in the light emitted from the backlight. As shown in FIG. 15C, depending on the arrangement of the plurality of LED light sources 10 ... 10, illumination light L3 emitted from one LED light source 10 and illumination emitted from another adjacent LED light source 10 are used. While the light L3 does not overlap as indicated by the broken line ellipse CC in the figure, a gap is generated between the illumination lights L3 (the illumination light having this gap is referred to as gap light). In this case, since the area of the gap between the illumination lights L3 is darker than the other areas, luminance unevenness (so-called dark lines) is visually recognized in the light emitted from the backlight.

  On the other hand, if the amount of lost light such as the overlapping light or gap light that emits light in such an unnecessary direction increases, the LED output becomes excessive by the amount of the overlapping light, and the luminance reduction due to the gap light is compensated. Therefore, it is necessary to increase the LED output. As the LED output increases, the amount of heat dissipation increases, so the heat sink for cooling the LED increases in size, and as a result, the backlight device increases in size. In the prior arts 2 to 4, although the luminance unevenness as described above is reduced, the generation of loss light itself is not reduced. Therefore, such an increase in the amount of heat dissipation, an increase in the size of the heat sink, and an increase in the size of the backlight device are reduced. It cannot be avoided. Since prior art 1 is not a technique for reducing the above-described luminance unevenness and is not a technique for reducing the generation of loss light itself, similarly, an increase in heat dissipation, a larger heat sink, and a backlight device Larger size cannot be avoided.

In addition, as a backlight for a head-up display, a light source with an ultra-high luminance of 1 million cd / m ² or more such as a 1.8-inch size is required. A configuration in which a diffuser is used to provide surface emission uniformity is common, but a multi-lamp low-power LED can also be used. When a high-power LED with a small number of lamps is used, the amount of loss light generated increases, leading to an increase in heat dissipation, a larger heat sink, and a larger backlight device. In the configuration where loss light generation itself is not reduced as in the prior arts 1 to 4, the number of LED lamps is further increased, and as a result, the amount of heat radiation is increased. This increases the size of the heat sink and the size of the backlight device.

  Therefore, the present invention is capable of suppressing an increase in the amount of heat dissipation, that is, reducing power consumption and cost, and enabling an increase in the size of the heat sink and an increase in the size of the backlight device, that is, a space saving of the device. It is another object of the present invention to provide a head-up display device.

  As a result of various studies, the present inventor has found that the above object is achieved by the present invention described below.

  That is, the illumination device according to the present invention is arranged in a planar shape of a two-dimensional matrix, and a plurality of light sources each emitting illumination light in one direction of the planar shape, and a plurality corresponding to each of the plurality of light sources. A converging lens disposed on the exit surface side of the plurality of light sources, and the plurality of convex lenses, the convex lens unit condensing the illumination light emitted from the corresponding light source. Having a plurality of bulging light emitting surfaces corresponding to each of the portions, and emitting light from the plurality of bulging light emitting surfaces so that each illumination light from the adjacent convex lens portions becomes parallel light without overlapping, A collimator lens array disposed on the exit surface side of the condenser lens.

  According to this configuration, the collimator lens array suppresses the spread of the illumination light so that the illumination light emitted from the plurality of light sources is collected by the condenser lens, and the collimator lens array includes each of the plurality of convex lens portions of the condenser lens. The illumination light emitted from the corresponding convex lens portion is expanded so that each illumination light from the adjacent convex lens portions becomes parallel light without overlapping. The emitted light exit surface further suppresses and emits light. Therefore, the generation of lost light itself can be reduced, power consumption and cost can be reduced, and the space of the apparatus can be saved. This effect becomes more remarkable when a large number of LEDs are used.

  The said structure WHEREIN: It is preferable that the curvature radius of the said convex lens part of the said condensing lens is smaller than the curvature radius of the said bulged light emission surface of the said collimator lens array. As a result, the illumination light emitted from the plurality of convex lens portions can reach the light exit surface where the collimator lens array bulges with almost no leakage, so that the light utilization efficiency can be increased.

  In the above configuration, the first diffuser is disposed on the exit surface side of the collimator lens array, and the second diffuser is spaced from the first diffuser on the exit surface side of the first diffuser. It is preferable that they are arranged open. Luminance unevenness can be reduced by using a diffuser. With the above arrangement of the two diffusers, the certainty of reducing luminance unevenness can be increased.

  In the case where the first diffuser and the second diffuser are disposed, the first diffuser has a haze value that represents the degree of diffusion of the illumination light, rather than the second diffuser. Is preferably small. As a result, the directivity of the light emitted from the condenser lens, collimator lens array, or the like disposed on the first diffuser side can be maintained as much as possible to reduce luminance unevenness and increase the light utilization efficiency. .

  A head-up display device according to the present invention includes any one of the above illumination devices that emits the illumination light, a projection member that forms and emits a display image by transmitting the illumination light from the illumination device, and an emission An optical system for shaping the displayed image, and projecting the shaped display image onto a display member, thereby displaying a virtual image of the display image so as to be visible to an observer.

  According to this configuration, since any one of the illumination devices having the above-described features and operational effects is provided, the generation of loss light itself can be reduced, power consumption and cost can be reduced, and the space of the device can be saved. Can be realized. This becomes more noticeable when a large number of LEDs are used.

  The lighting device and the head-up display device according to the present invention can suppress an increase in heat dissipation, that is, reduce power consumption and cost, and suppress an increase in the size of a heat sink and an increase in the size of a backlight device, that is, a space saving of the device. Can be realized.

1 is a schematic side view of a head-up display device mounted on a vehicle according to an embodiment of the present invention. It is a schematic side view of the other example of the head-up display device. It is a perspective view explaining the external appearance of the backlight which concerns on one Embodiment of this invention. It is a front view explaining the external appearance of the backlight. It is a disassembled front view which shows the structure of the illuminating device which concerns on one Embodiment of this invention. It is a disassembled perspective view which shows the structure of the illuminating device. It is the top view of each component which looked at the illuminating device from the output surface side. It is the VIII-VIII sectional view taken on the line of FIG. It is the IX-IX sectional view taken on the line of FIG. It is a perspective view which shows the condensing lens which is a component of the illumination device. It is a perspective view which shows the collimator lens array which is a component of the illumination device. It is a front view explaining the modification of a structure of the same illuminating device. It is a front view explaining the other modification of the structure of the same illuminating device. It is a front view explaining the further another modification of the structure of the same illuminating device. It is a figure explaining the effect of the illuminating device of this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals indicate the same or corresponding parts, and the description thereof will be omitted as appropriate unless otherwise specified.

  FIG. 1 is a schematic side view of a head-up display (HUD) device 700 mounted on a vehicle 600 according to an embodiment. The HUD device 700 includes a backlight 200 including a lighting device 100 (FIG. 3) described later, a projection member 300, and an optical system 400. The HUD device 700 is placed, for example, in the vicinity of the dashboard of the vehicle 600 where a steering wheel 610 and an instrument panel (not shown) are provided. Specifically, as shown in the perspective view of FIG. 3 and the front view of FIG. 4, the backlight 200 includes, for example, a lighting device 100 that is covered with a black upper frame 210 and the light output portion 101 is exposed, and a heat sink 60. Composed. Illumination light that is, for example, uniform white light is emitted from the light output unit 101 of the illumination device 100.

  The projection member 300 in FIG. 1 is a transmissive dot matrix TFT liquid crystal panel (LCD) or the like, and displays an image of a display original image and planar LCD data as character data on the liquid crystal panel, and the light output of the illumination device 100 is displayed there. By transmitting the illumination light from the unit 101, a display original image is formed and optically emitted. The optical system 400 is a concave mirror in this example, but may be an optical element such as a lens, a prism, or an optical fiber. By the optical system 400, the display original image is shaped into a display image, and projected onto a display member 500A for display (hereinafter referred to as a windshield 500A) such as a windshield of the vehicle 600. Depending on the curvature of the curved surface of the windshield 500A and the optical orientation and positional relationship between the windshield 500A and the backlight 200, the size, inclination and distortion of the display image projected on the windshield 500A. Therefore, the display original image is enlarged or reduced by the optical system 400 and shaped such as correction of the tilt and distortion, and becomes a display image for display on the display member.

  On the windshield 500A, a display image that is character information such as the speed of the vehicle and image information such as a navigation image is projected, and the display image and the scenery in front of the vehicle are superimposed and recognized by the driver. From the viewpoint (or field of view) D of the driver, for example, the display image appears to float in the landscape ahead of the vehicle 3 to 5 meters ahead of the vehicle. In order not to disturb the driving, the display image is, for example, only information necessary for driving the vehicle is displayed near the corner of the windshield 500A.

  The display member on which the display image is projected is the windshield 500A in FIG. 1, but may be a combiner 500B shown in FIG. The combiner 500B is a display composed of, for example, a half mirror, and when a display image is projected, the scenery in front of the vehicle and the display image are superimposed and recognized by the driver via the combiner 500B. The combiner 500B and the HUD device 700 may be sold as an integrated device. In this case, the combiner 500B and the HUD device can be sold as a device with optimized optical characteristics before shipping. It is preferable that it can be simply attached to the vehicle as it is.

  As shown in the exploded front view of the illuminating device 100 in FIG. 5, the illuminating device 100 includes a plurality of light sources 10... 10 that emit illumination light, a condenser lens 20, and a collimator lens array 30 in the emission direction. Prepare in this order. Furthermore, in the illumination device 100, a first diffuser (diffusion sheet) 40 is disposed on the exit surface side of the collimator lens array 30, and a second diffuser (on the exit surface side of the first diffuser sheet 40). (A diffusion sheet) 50 is disposed at a distance from the first diffusion sheet 40. In the present embodiment, the intervals between the plurality of light sources 10, the condensing lens 20, the collimator lens array 30, the first diffusion sheet 40, and the second diffusion sheet 50 are, for example, 0.5 mm and 6.9 mm, respectively. 3.2 mm and 2.9 mm. Note that a transparent glass (not shown) that protects the second diffusion sheet 50 may exist on the foremost surface on the light exit surface side of the lighting device 100, and in this case, the transparent glass forms the light output portion 101.

  The plurality of light sources 10 are arranged in a two-dimensional matrix plane (xy plane) as shown in the exploded perspective view of the illumination device 100 in FIG. 6, and are directed toward one direction (upward in FIG. 6) of the xy plane. Each of the illumination lights L1 is emitted. The light source 10 is, for example, a white LED such as a product number NSSW157 manufactured by Nichia. A plurality of light sources 10 shown in FIG. 5 are, for example, soldered onto a wiring board 12 that supplies and controls each light source 10. As shown in FIG. 7, the plurality of light sources 10 are arranged in the x direction and only four in the y direction, and a total of 36 light sources 10 are used in the x direction (FIG. 8) and the y direction (FIG. 9). The arrangement pitch P1 is 6 mm, which is equally spaced, and the LED elements are arranged in the same direction. On the wiring board 12 shown in FIG. 3, a heat sink 60, which is a cooling member that dissipates heat generated by each light source 10, is attached in an electrically insulated state to the surface opposite to the surface on which the plurality of light sources 10 are mounted. It has been.

  In addition, the light source 10 of the illumination device 100 of this embodiment is inferior in power per lamp, but a large size reduction is realized by using a large number of low-cost LEDs to improve the light utilization efficiency. . The backlight unit size of the example of this embodiment is, for example, length 66 × width 40 × height 16 mm, while the unit size of the conventional backlight (eg, length 70 × width 45 × height 35 mm) is used. It has become. In addition, as described later, power consumption has also been reduced, which has a great effect of reducing the size of the heat sink 60, and heat sinks of other conventional products (eg, length 100 × width 60 × height 60 mm). On the other hand, the size of the heat sink 60 in the example of the present embodiment is 90 × length × 40 × 40 mm in height, and the space can be saved, for example, the height is reduced to 2/3. Yes.

  The condensing lens 20 of FIG. 5 has a plurality of convex lens portions 22... 22 corresponding to each of the plurality of light sources 10, and the convex lens portion 22 condenses the illumination light L1 emitted from the corresponding light source 10. The illumination light L2 is emitted. The condenser lens 20 is disposed on the emission surface side of the plurality of light sources 10. As shown in FIG. 10, the plurality of convex lens portions 22 are disposed away from each other on the exit surface side of the condenser lens 20. As shown in FIG. 7, each of the plurality of light sources 10 is arranged in the xy direction. It corresponds by existing in the almost same position. Therefore, the plurality of convex lens portions 22 are formed on the condenser lens 20 by the same number as the plurality of light sources 10.

  The condensing lens 20 is manufactured by injection molding of a thermoplastic resin such as PMMA or PC (in this embodiment, PMMA). In the present embodiment, the radius of curvature R1 of each convex lens portion 22 shown in FIG. 8 is 2 mm, for example, and the interval P2 between adjacent convex lens portions 22 is 6 mm in both the x and y directions, for example. The vertices bulge from the main surface 24 of the condenser lens 20 by 2.3 mm (maximum thickness = 2.3 mm).

  The collimator lens array 30 shown in FIG. 5 has a plurality of bulged light output surfaces 32 corresponding to each of the plurality of convex lens portions 22, and specifically, collimator lenses 34 having the light output surfaces 32, respectively. 34. The collimator lens array 30 is disposed on the exit surface side of the condenser lens 20. Each collimator lens 34 receives each illumination light L2 emitted from the corresponding convex lens section 22, and each collimator lens 34 receives illumination light L3 in which the directions of the lights L2 are aligned in parallel. Emitted. Specifically, the light exit surface 32 swelled out of the collimator lens 34 suppresses the spread of the light of each illumination light L2, so that the adjacent illumination light L3 becomes parallel light without overlapping (that is, overlapped light and light). Illumination light L3 (which does not become gap light) is emitted from the plurality of light emitting surfaces 34 that have bulged.

  As shown in FIG. 11, the plurality of collimator lenses 34 are disposed adjacent to each other on the exit surface side of the collimator lens array 30, and as shown in FIG. 7, the plurality of light sources 10 are arranged in the xy direction. This corresponds to each of the convex lens portions 22 and substantially the same position. Accordingly, the plurality of collimator lenses 34 are formed on the collimator lens array 30 by the same number as the plurality of light sources 10. In other words, the emitted light L3 is emitted from the entire surface of the collimator lens array 30, but in detail, the emitted light L3 is emitted divided into 36 light emitting regions.

  The collimator lens array 30 is manufactured by injection molding of a thermoplastic resin such as PMMA or PC (in this embodiment, PMMA). In this embodiment, the radius of curvature R2 of each collimator lens 34 shown in FIG. 8 is, for example, 6.3 mm, and the apex of the bulging light exit surface 32 is the main surface 35 of the collimator lens array 30 by 2.5 mm. (Maximum thickness = 2.5 mm). As described above, the radius of curvature R1 of the convex lens portion 22 of the condenser lens 20 of the present embodiment is smaller than the radius of curvature R2 of the light exiting surface 32 of the collimator lens array 30 bulged.

  In the collimator lens 34 of the present embodiment, the overlapping light indicated by the broken line ellipse AA in FIG. 15A and the gap light indicated by the broken line ellipse CC in FIG. As shown in (B), in addition to suppressing the spread of the illumination light L2 by the convex lens portion 22, the illumination light L2 emitted from the convex lens portion 22 so that the adjacent illumination lights L3 become parallel light without overlapping. Further, the corresponding collimator lens 34, that is, the bulging light emitting surface 32, suppresses the spread of the light and emits the illumination light L 3. Therefore, in the illumination light L3, the light directions are aligned in parallel as described above, and the illumination device 100 of the present embodiment can reduce the generation of loss light (overlapping light or gap light) itself.

  That is, in the present embodiment, by providing the collimator lens array 30 in addition to the condenser lens 20, it is possible to reduce the occurrence of loss light itself, and to reduce the power consumption and cost of the LED 10, Further, since the heat sink 60 is reduced in size, the space of the apparatus can be saved. This effect becomes more remarkable when a large number of LEDs are used.

  In addition, since the light emission surface 32 of the collimator lens array 30 shown in FIG. 5 bulges and is adjacent, a valley (valley portion 37) is formed at the boundary of each collimator lens 34, that is, the boundary of each light emitting region. In the collimator lens array 30 of the present embodiment, a not-shown wrinkle is formed in the valley portion 37. Therefore, the wrinkles are arranged in a lattice pattern on the collimator lens array 30 along the valleys 37, that is, the boundaries between the light emitting regions. The width of each grain is about 1 to 2 mm. It should be noted that the embossing density, that is, the embossing pitch width and height, may be different between the trough 37 in one direction (x direction) and the trough 37 in the other direction (y direction). Each light emitting area of the collimator lens 34 mainly emits light from one LED 10 disposed in each of the light emitting areas. Therefore, the joint of the irradiation range of each LED 10, that is, the boundary of the light emitting area is conspicuous, and uneven brightness occurs. To do. Specifically, a bright line or a dark line is easily visually recognized along the valley portion 37 of the collimator lens array 30. However, due to the presence of the grain, the luminance of the light emitted from the boundary line (the valley portion 37) can be averaged, and the occurrence of luminance unevenness can be reduced.

  The diffusion sheets 40 and 50 are made of, for example, a PET resin which is a thermoplastic engineering plastic. The diffusion sheets 40 and 50 are passed by forming a minute lens array on the surface or coating the surface with a resin that diffuses light. The diffused light can be diffused to provide more uniform illumination light. The second diffusion sheet 50 has a haze value of 67% indicating the degree of diffusion of illumination light. Since the emitted light L3 from the valley portion 37 of the collimator lens array 30 has a large amount of light, the second diffusion sheet 50 needs to diffuse the emitted light L3 in order to reduce luminance unevenness. Therefore, the second diffusion sheet 50 has a higher light diffusion function than the first diffusion sheet 40 because the HAZE value is higher than that of the first diffusion sheet 40 described later. Here, the second diffusion sheet 50 is disposed on the emission surface side of the first diffusion sheet with a space from the first diffusion sheet.

  The first diffusion sheet 40 has a HAZE value of 29%. The second diffusion sheet 50 diffuses the emitted light diffused by the first diffusion sheet 40 again, and emits the illumination light L4 with further reduced luminance unevenness. It is not necessary to provide both the first diffusion sheet 40 and the second diffusion sheet 50, and only one of them may be used. For example, only the second diffusion sheet 50 may be used. In the present embodiment, the above diffusion sheet is used as the diffuser, but a fly-eye lens or the like may be used instead of the diffusion sheet.

  The present invention is not limited to the above-described embodiments, and various additions, modifications, or deletions are possible within the scope not departing from the gist of the present invention. Therefore, such a thing is also included in the scope of the present invention. Such a configuration is also included in the scope of the present invention.

  For example, the following modifications may be made in the configuration of the illumination device 100 described above. As shown in FIG. 12, instead of the collimator lens array 30, a concave-convex mixed lens body 36 having convex lens bodies 36a (corresponding to the collimator lens 34) and concave lens bodies 36b alternately in an array may be used. In the figure, the HAZE value of the diffusion sheet 40A is 87%. In this case, luminance unevenness due to a bright line or a dark line generated by a valley which is a boundary of a light emitting region corresponding to the convex lens body 36a can be reduced by making the concave lens body 36b correspond to the valley. As shown in FIG. 13, instead of the condenser lens 20 and the plurality of convex lens portions 22, for example, a condenser lens 28 having a plurality of meniscus lenses 28c (corresponding to the convex lens portion 22) having concave surfaces 28b and convex surfaces 28a. Also good. Further, as shown in FIG. 14, the condensing lens 28 and the above-described fly-eye lens 38 disposed on the exit surface side of the condensing lens 28 and spaced apart from each other are used. It may be. In the example of FIGS. 13 and 14 as well, the luminance unevenness due to the bright line or the dark line that occurs in the valley 27 that is the boundary of the light emitting region can be reduced by the lens shape (configuration) described in each example.

DESCRIPTION OF SYMBOLS 10 (plurality) light source 20 Condensing lens 22 (plurality) convex lens part 28 Condensing lens 28c Meniscus lens (convex lens part)
30 collimator lens array 32 bulged light exiting surfaces 34 collimator lens 36a convex lens body (collimator lens)
40 First diffusion sheet (diffuser)
50 Second diffusion sheet (diffuser)
DESCRIPTION OF SYMBOLS 100 Illuminating device 300 Projection member 400 Optical system 700 HUD (head up display) apparatus L1, L2, L3, L4 Illumination light

Claims (5)

A plurality of light sources arranged in a planar shape of a two-dimensional matrix and emitting illumination light respectively in one direction of the planar shape;
It has a plurality of convex lens parts corresponding to each of the plurality of light sources, and is arranged on the emission surface side of the plurality of light sources, where the convex lens parts collect the illumination light emitted from the corresponding light sources. A condensing lens,
From the plurality of light emitting surfaces bulged so as to have a plurality of bulged light emitting surfaces corresponding to each of the plurality of convex lens portions, and each illumination light from the adjacent convex lens portions becomes parallel light without overlapping. A collimator lens array disposed on the exit surface side of the condenser lens that emits light; and
A lighting device. The lighting device according to claim 1,
The illuminating device, wherein a radius of curvature of the convex lens portion of the condenser lens is smaller than a radius of curvature of the bulged light exit surface of the collimator lens array. The lighting device according to claim 1 or 2,
A first diffuser is disposed on the exit surface side of the collimator lens array, and a second diffuser is disposed on the exit surface side of the first diffuser at a distance from the first diffuser. Lighting equipment. The lighting device according to claim 3,
The first diffuser has a smaller haze value representing the degree of diffusion of the illumination light than the second diffuser. The illumination device according to any one of claims 1 to 4, which emits the illumination light;
A projection member that forms and emits a display image by transmitting illumination light from the illumination device; and
An optical system for shaping the emitted display image;
Comprising
A head-up display device for projecting the shaped display image onto a display member to display a virtual image of the display image so as to be visible from an observer

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