JP2014094177A - Mirror device with lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mirror device with a lighting device capable of illuminating a subject to be projected on a mirror with enough brightness and more uniformly.SOLUTION: A mirror device 10 with a lighting device includes: a mirror 30; and a surface light source device 40 located at least on the side of the mirror 30 along a certain direction d. In the angle distribution in a plane parallel to both the normal direction nd of the mirror and the certain direction concerning the luminance on the light emitting surface 40a of the surface light source device, the direction presenting the peak luminance is inclined from the side of the surface light source device in the certain direction toward the side of the mirror with respect to the normal direction of the mirror.

Description

  The present invention relates to an illuminated mirror apparatus having a mirror and a surface light source device.

  For example, as disclosed in Patent Document 1, there is known a mirror device with illumination that is a combination of a mirror and an illumination device. In many of the conventional mirror devices with illumination, the illumination device emits diffuse light having no directivity or weak directivity. Therefore, in this device, only a part of the light from the illumination device is irradiated to the subject to be projected on the mirror. In consideration of heat from the illuminating device, emission of ultraviolet rays, and the like, it is necessary to limit the irradiation intensity from the illuminating device, and thus the subject cannot be illuminated sufficiently brightly. In the first place, a large amount of light from the illumination device is not effectively used, which is not preferable in that the use efficiency of illumination light is significantly reduced.

  In order to solve the above problems, there is an illuminated mirror device using a point light source such as a spotlight as an illumination device. However, with illumination from a point light source, the amount of light applied to each position of the subject varies greatly depending on the distance from the point light source, and the subject cannot be illuminated with uniform brightness. In particular, when the subject is three-dimensional, the uneven brightness of the subject illuminated by the point light source becomes significant. In addition, when a point light source is used, the entire subject may not be illuminated depending on the distance between the subject and the point light source, the size of the subject, and the like.

JP 2001-46199 A

  The present invention has been made in consideration of the above points, and an object of the present invention is to provide an illuminated mirror device that can illuminate a subject to be reflected on a mirror more uniformly with sufficient brightness.

The illuminated mirror device according to the present invention comprises:
With a mirror,
A surface light source device positioned at least at a position on the side of the mirror along a certain direction,
The direction of peak luminance in the angular distribution in a plane parallel to both the normal direction of the mirror and the one direction with respect to the luminance on the light emitting surface of the surface light source device is the normal direction of the mirror On the other hand, it is inclined from the surface light source device side to the mirror side in the one direction.

  In the mirror apparatus with illumination according to the present invention, the surface light source device may include a light guide plate and a light emitting diode disposed at a position facing the light guide plate.

In the mirror apparatus with illumination according to the present invention,
The first surface light source device and the second surface light source device are respectively disposed at positions on both sides of the mirror along the one direction.
The direction of the peak luminance in the angular distribution in the plane parallel to both the normal direction of the mirror and the one direction with respect to the luminance on the light emitting surface of the first surface light source device is the mirror method. Inclining from the side of the first surface light source device in the one direction to the side of the mirror with respect to the line direction,
The direction of the peak luminance in the angle distribution in the plane parallel to both the normal direction of the mirror and the one direction with respect to the luminance on the light emitting surface of the second surface light source device is the mirror method. You may incline with respect to the line direction from the said 2nd surface light source device side in the said one direction to the said mirror side.

In the mirror apparatus with illumination according to the present invention,
The first mirror and the second mirror are arranged at positions on both sides of the surface light source device along the one direction, respectively.
A first peak luminance and a second peak luminance are generated in an angular distribution in a plane parallel to the one direction with respect to the luminance on the light emitting surface of the surface light source device,
The direction exhibiting the first peak luminance is inclined from the surface light source device side in the one direction to the first mirror side with respect to the normal direction to the first mirror,
The direction of exhibiting the second peak luminance may be inclined from the surface light source device side in the one direction to the second mirror side with respect to the normal direction to the second mirror.

  In the mirror device with illumination according to the present invention, the surface light source device may be movable with respect to the mirror.

  In the illuminated mirror device according to the present invention, the surface light source device may be removable from the illuminated mirror device.

  In the mirror device with illumination according to the present invention, the angle formed by the direction in which the peak luminance is exhibited with respect to the normal direction of the mirror may be not less than 15 ° and not more than 75 °.

  In the mirror apparatus with illumination according to the present invention, the peak luminance in the angular distribution in a plane parallel to both the normal direction of the mirror and the one direction with respect to the luminance on the light emitting surface of the surface light source device. The width of the angle region that includes a direction exhibiting the above and can obtain a luminance of half or more of the peak luminance may be 10 ° or more and 70 ° or more.

  In the mirror apparatus with illumination according to the present invention, the peak luminance in the angular distribution in a plane parallel to both the normal direction of the mirror and the one direction with respect to the luminance on the light emitting surface of the surface light source device. The angle range that includes a direction exhibiting at least half of the peak luminance is inclined from the surface light source device side to the mirror side in the one direction with respect to the normal direction of the mirror. It may be in range.

  According to the present invention, a subject to be photographed on a mirror can be illuminated sufficiently uniformly with sufficient brightness. As a result, the reflection of the subject on the mirror can be effectively improved.

FIG. 1 is a diagram for explaining an embodiment of the present invention, and FIG. 1 is a perspective view showing an illuminated mirror device. FIG. 2 is a top view showing the illuminated mirror device of FIG. FIG. 3 is a perspective view showing a surface light source device incorporated in the illuminated mirror device of FIG. FIG. 4 is a cross-sectional view of the surface light source device of FIG. 3 and is a view for explaining the operation of the surface light source device. FIG. 5 is a view showing a cross section taken along line VV in FIG. 4 and is a view for explaining the operation of the light guide plate. FIG. 6 is a graph showing the angular distribution of the luminance on the light emitting surface of the surface light source device. FIG. 7 is a perspective view showing a modification of the illuminated mirror device. FIG. 8 is a perspective view showing another modification of the illuminated mirror device. FIG. 9 is a perspective view showing still another modified example of the illuminated mirror device. FIG. 10 is a side view showing the illuminated mirror device of FIG. 9 in a folded state. FIG. 11 is a diagram corresponding to FIG. 2, and is a top view showing still another modified example of the illuminated mirror device. FIG. 12 is a graph showing the angular distribution of the luminance on the light emitting surface of the surface light source device of FIG. FIG. 13 is a diagram corresponding to FIG. 4, and shows an example of a surface light source device that can be incorporated in the illuminated mirror device of FIG. 11. FIG. 14 is a diagram corresponding to FIG. 4 and showing a modification of the surface light source device. FIG. 15 is a perspective view showing still another modified example of the illuminated mirror device.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1 to FIG. 15, for convenience of illustration and understanding, the scale and the vertical / horizontal dimension ratio are appropriately changed and exaggerated from those of the actual product.

  In addition, as used in the present specification, the terms specifying the shape and geometric conditions and the degree thereof, for example, terms such as “parallel”, “orthogonal”, “triangular shape”, angle values, etc. are the same. Interpretation should include an error range to the extent that an optical function can be expected.

FIGS. 1-6 is a figure for demonstrating one Embodiment by this invention. Among these, FIG. 1 is a perspective view showing the illuminated mirror device 10, and FIG. 2 is a top view showing the illuminated mirror device 10. As shown in FIGS. 1 and 2, the illuminated mirror device 10 includes a mirror 30 having a surface 34 that captures the subject 5, and the mirror 30 along a first direction d ₁ that extends parallel to the plate surface of the mirror 30. And a surface light source device 40 positioned at least in a lateral position. The surface light source device 40 has a light emitting surface 40a and projects light in a planar shape from the light emitting surface 40a. In the mirror device with illumination 10, the subject 5 to be photographed on the mirror 30 can be illuminated by the surface light source device 40, whereby the reflection of the subject 5 on the mirror 30 can be improved. In particular, in the embodiment described below, an illuminated mirror device that illuminates the subject 5 facing the mirror 30, that is, the subject 5 facing the mirror 30 along the normal direction nd of the mirror 30 with the surface light source device 40. Take 10 as an example. Such an illuminated mirror device 10 can be suitably used as, for example, a mirror for a restroom, a mirror for a fitting room, a mirror of a beauty salon or a barber shop, a mirror of a cosmetics department, and the like.

  As shown in FIGS. 1 and 2, the illuminated mirror device 10 further includes a support element 20 that supports the mirror 30 and the surface light source device 40. In the example shown in FIGS. 1 and 2, the support element 20 is configured as a frame structure 21 disposed on the back side of the mirror 30. The surface light source device 40 is arranged at a position around the mirror 30 by the frame structure 21, and emits the illumination light La with a specific light distribution characteristic related to the relative positional relationship with the mirror 30. Due to this light distribution characteristic, the subject 5 can be effectively illuminated by the illumination light La from the surface light source device 40, so that the image 6 of the subject 5 can be reflected on the mirror 30 and be well imaged. .

  Hereinafter, the illuminated mirror device 10 will be described in more detail by taking the illustrated embodiment as an example.

The surface light source device 40 is located at least at a position on the side of the mirror 30 along a first direction d ₁ that extends parallel to the plate surface of the mirror 30. In the illustrated example, the mirror 30 is configured as a plane mirror. The first direction d ₁ extends along the surface 34 of the mirror 30 that captures the subject 5, in other words, the surface 34 on the side where the subject image 6 is observed.

  In this specification, “sheet surface”, “film surface” used for mirror-like, sheet-like, film-like, plate-like, or panel-like objects such as the light guide plate 50 and the optical sheet 70 described later. "," Plate surface "or" panel surface "refers to a surface defined by an object when the object is viewed globally and globally. In the present specification, the normal direction used for a mirror-like, sheet-like, film-like, plate-like, or panel-like object such as the light guide plate 50 and the optical sheet 70 described later is the object. The normal direction to the sheet surface, film surface, plate surface, or panel surface of an object.

In the example illustrated, the illuminated mirror device 10 includes a first surface light source device 41 and a second surface light source device 42. The first surface light source device 41 and the second surface light source device 42 are aligned with the mirror 30 along the first direction d ₁ , and the mirror 30 is positioned between the first surface light source device 41 and the second surface light source device 42. doing. In particular, in the example shown in FIGS. 1 and 2, the light emitting surface 41 a of the first surface light source device 41 and the light emitting surface 42 a of the second surface light source device 42 together with the surface 34 that captures the subject 5 of the mirror 30 in the first direction d. ₁ , the first surface light source device 41, the second surface light source device 42, and the mirror 30 are arranged. The first direction d ₁ extends in the horizontal direction, and the first surface light source device 41 and the second surface light source device 42 are disposed on both sides of the mirror 30.

However, the configuration shown by the solid line in FIGS. 1 and 2 is merely an example, and various modifications are possible. For example, the position of the surface light source device 40 with respect to the mirror 30 is not limited to the position indicated by the solid line in FIG. Further, only one surface light source device 40 or three or more surface light source devices 40 may be incorporated into the illuminated mirror device 10. As a specific example, as shown by a two-dot chain line in FIG. 1, the first and second surface light source devices 41 are positioned at the side of the mirror 30 along the second direction d ₂ intersecting the first direction d _1. , 42 or in addition to the first and second surface light source devices 41, 42, one or more of the third and fourth surface light source devices 43, 44 may be provided. By optimizing the number of the surface light source devices 40 and the relative position with respect to the mirror 30, it is possible to illuminate the subject 5 in a brighter manner and more generally without causing more shade.

  Further, the surface light source device 40 may be removable from the support element 20 of the illuminated mirror device 10. In this example, the removable surface light source device 40 may be attachable to two or more different positions. By making the surface light source device 40 removable, it is possible to remove the surface light source device 40 from the illuminated mirror device 10 when there is no need to illuminate the subject 5, thereby improving the convenience of the illuminated mirror device 10. However, it is also convenient from the viewpoint of space saving. For example, one or more of the first surface light source device 41 and the second surface light source device 42 of FIG. 1 are removed from the frame structure 21 and the third surface light source device 43 or the fourth surface light source indicated by the two-dot chain line. It may be possible to be attached to the position of the device 44. By optimizing the relative position of the surface light source device 40 with respect to the mirror 30, it is possible to illuminate the subject 5 in a brighter manner and more generally without causing more shade.

  Further, the surface light source device 40 may be relatively movable with respect to the mirror 30 of the illuminated mirror device 10, in other words, may be movable with respect to the mirror 30 of the illuminated mirror device 10. As a specific example, as indicated by a two-dot chain line in FIG. 2, one or more of the first surface light source device 41 and the second surface light source device 42 may be able to swing relative to the mirror 30. By optimizing the relative position of the surface light source device 40 with respect to the mirror 30, the subject 5 can be illuminated more brightly and overall without causing more shade.

Next, the light distribution characteristic of the surface light source device 40 will be described. FIG. 6 shows an angular distribution dc1 regarding the luminance on the light emitting surface 41a of the first surface light source device 41 and an angular distribution dc2 regarding the luminance on the light emitting surface 42a of the second surface light source device 42. Angular distribution dc1, dc2 of the luminance shown in the graph of FIG. 6 are those measured in a plane parallel to both the normal direction nd and the first direction d ₁ of the mirror 30. In the graph of FIG. 6, the vertical axis indicates the luminance, and the horizontal axis indicates the angle at which the luminance is measured. Note that the value of the angle is 0 ° in the direction parallel to the normal direction nd of the mirror 30, and the angle when tilted clockwise with respect to the normal direction nd is a positive value. The angle when tilted counterclockwise with respect to the line direction nd was a negative value.

As shown in FIGS. 2 and 6, the luminance on the light emitting surface 40 a of the surface light source device 40 has a peak in the angular distribution in a plane parallel to both the normal direction nd and the first direction d ₁ of the mirror 30. The direction in which the luminance is exhibited is inclined from the surface light source device 40 side to the mirror 30 side in the first direction d _{1 with} respect to the normal direction nd of the mirror 30. In other words, the magnitude of the angle value formed by the direction in which the peak luminance is present in the angular distribution of the luminance with respect to the normal direction nd of the mirror 30, that is, the absolute value of the angle value is greater than 0 ° and 90 °. Less than.

In the illuminated mirror device 10 shown in FIGS. 1 and 2, the luminance on the light emitting surface 41 a of the first surface light source device 41 is parallel to both the normal direction nd and the first direction d ₁ of the mirror 30. The direction d _p1 exhibiting the peak luminance in the in-plane angle distribution dc1 is from the first surface light source device 41 side in the first direction d ₁ to the mirror 30 side with respect to the normal direction nd of the mirror 30. It is inclined. That is, the value of the angle θ _p1 formed by the direction d _p1 exhibiting the peak luminance in the angular distribution of the luminance on the light emitting surface 41 a of the first surface light source device 41 with respect to the normal direction nd of the mirror 30 is from 0 °. It is large and less than 90 °. The direction exhibiting a peak intensity at a second surface light source device 42 angular distribution in the surface parallel to both the normal direction nd and the first direction d ₁ of the mirror 30 for the luminance on the light emitting surface 42a of dc2 d _p2 is inclined from the second surface light source device 42 side in the first direction d ₁ toward the mirror 30 side with respect to the normal direction nd of the mirror 30. That is, the value of the angle θ _p2 formed by the direction d _p2 exhibiting the peak luminance in the angular distribution of the luminance on the light emitting surface 42 a of the second surface light source device 42 with respect to the normal direction nd of the mirror 30 is −90 °. It is larger and less than 0 °.

  In this way, according to the illuminated mirror device 10 in which the direction in which peak luminance is exhibited in the angular distribution of luminance is adjusted with respect to the normal direction nd of the mirror 30, the subject is illuminated by the illumination light La from the surface light source device 10. 5 can be efficiently illuminated. That is, the light La emitted from the surface light source device 10 can be used for illumination of the subject 5 with high utilization efficiency. As a result, it is possible to illuminate the subject 5 with sufficient brightness while avoiding increasing the irradiation intensity of the surface light source device 10 to an unfavorable point from the point of release of heat and ultraviolet rays. Also, unlike a point light source such as a spotlight, the surface light source device 40 has a light emitting surface 40a of an appropriate size in consideration of the size of the subject 5 and the size of the surface 34 of the mirror 30 that captures the subject 5. Can do. Therefore, the portion projected on the mirror 30 of the subject 5 is generally illuminated with sufficiently uniform brightness while effectively suppressing the occurrence of uneven brightness in the portion projected on the mirror 30 of the subject 5. Can do.

The mirror 30 of the illuminated mirror device 10 is intended to capture a human face in applications such as a mirror for a restroom, a mirror for a fitting room, a mirror at a beauty salon or a barber shop, and a mirror at a cosmetics department. If it is, the direction exhibiting a peak intensity in the angular distribution in the surface parallel to both the normal direction nd and the first direction d ₁ of the mirror 30 for the brightness on the light emitting surface 40a of the surface light source device 40 However, the magnitude of the angle value formed with respect to the normal direction nd of the mirror 30, that is, the absolute value of the angle value is preferably 15 ° or more and 75 ° or less. When the present inventors have conducted extensive experiments, according to such a setting, the human face as the subject 5 is illuminated very effectively, and the reflection of the human face on the mirror 30 is effectively performed. It was possible to improve.

Further, as shown in FIG. 6, the peak in the angular distribution in the plane parallel to both the normal direction nd and the first direction d ₁ of the mirror 30 with respect to the luminance on the light emitting surface 40a of the surface light source device 40. The width of the angle range that includes the direction in which the luminance is exhibited and at least half the peak luminance is obtained, in other words, the half-width angle is 10 ° or more and 70 ° or less. Therefore, the angle range is approximately in the range of ± 5 ° to ± 35 ° with the peak luminance at the center. In the illuminated mirror device 10 shown in FIGS. 1 and 2, the luminance on the light emitting surface 41 a of the first surface light source device 41 is parallel to both the normal direction nd and the first direction d ₁ of the mirror 30. In the in-plane angular distribution dc1, the width θ _{w1 of the} angle region including the direction d _p1 in which the peak luminance is exhibited and at least half the peak luminance is obtained is 10 ° or more and 70 ° or less, and , in the angular distribution dc2 in a plane parallel to the both the normal direction nd and the first direction d ₁ of the mirror 30 for the brightness on the light emitting surface 42a of the second surface light source device 42, a direction exhibiting a peak intensity The width θ _{w2 of the} angular region that includes d _p2 and at which half or more of the peak luminance is obtained is 10 ° or more and 70 ° or less.

  In this way, the mirror device with illumination 10 in which the width of the angle region in which the luminance is more than half of the peak luminance is set in the angular distribution of luminance, that is, the illumination in which the full width at half maximum in the angular distribution of luminance is set. According to the attached mirror device 10, the subject 5 can be efficiently illuminated by the illumination light La from the surface light source device 10. That is, the light La emitted from the surface light source device 10 can be used for illumination of the subject 5 with high utilization efficiency. As a result, it is possible to illuminate the subject 5 with sufficient brightness while avoiding increasing the irradiation intensity of the surface light source device 10 to an unfavorable point from the point of release of heat and ultraviolet rays. In addition, unlike a point light source such as a spotlight, the surface light source device 40 has a light emitting surface 40a of an appropriate size in consideration of the size of the subject 5 and the size of the surface 34 of the mirror 30 that captures the subject 5. Can do. Then, it is possible to irradiate the illumination light La that spreads from each position in the light emitting surface 40a to an appropriate angular range. As a result, each position of the subject 5 can be irradiated with illumination light La emitted from each position on the light emitting surface 40a having an appropriate size. Therefore, it is projected on the mirror 30 of the subject 5 while effectively suppressing the occurrence of shade in the portion projected on the mirror 30 of the subject 5 and effectively suppressing the occurrence of uneven brightness. It is possible to illuminate the entire part with sufficiently uniform brightness.

The mirror 30 of the illuminated mirror device 10 is intended to capture a human face in applications such as a mirror for a restroom, a mirror for a fitting room, a mirror at a beauty salon or a barber shop, and a mirror at a cosmetics department. The peak luminance is exhibited in the angular distribution in the plane parallel to both the normal direction nd and the first direction d ₁ of the mirror 30 with respect to the luminance on the light emitting surface 40a of the surface light source device 40. It is preferable that the width of the angle region including the direction and obtaining a luminance of half or more of the peak luminance is 20 ° or more and 60 ° or less. When the present inventors have conducted extensive experiments, according to such a setting, the human face as the subject 5 is illuminated very effectively, and the reflection of the human face on the mirror 30 is effectively performed. It was possible to improve.

Furthermore, as shown in FIG. 6, the peak luminance in the angular distribution in the plane parallel to both the normal direction nd and the first direction d ₁ of the mirror 30 with respect to the luminance on the light emitting surface 40 a of the surface light source device 40. An angle region including a direction exhibiting a luminance of at least half of the peak luminance is inclined from the surface light source device 40 side to the mirror 30 side in the first direction d _{1 with} respect to the normal direction nd of the mirror 30. It is in the range. In other words, each direction within the angle region including the direction exhibiting the peak luminance in the angular distribution of luminance and obtaining half the peak luminance is inclined to the same side with respect to the normal direction nd of the mirror 30. .

In the illuminated mirror device 10 shown in FIGS. 1 and 2, directions d _wx1 and d _{wy1 in} which half the peak luminance is obtained in the angular distribution of the luminance on the light emitting surface 41a of the first surface light source device 41 are obtained. Both are inclined from the side of the first surface light source device 41 in the first direction d ₁ to the side of the mirror 30 with respect to the normal direction nd of the mirror 30. Then, the angle θ formed by the directions d _wx1 and d _{wy1 in} which the half luminance of the peak luminance is obtained in the angular distribution of the luminance on the light emitting surface 41a of the first surface light source device 41 with respect to the normal direction nd of the mirror 30 The values of _wx1 and θ _wy1 are greater than 0 ° and less than 90 °. Also, the directions d _wx2 and d _{wy2 in} which half the peak luminance is obtained in the luminance angular distribution on the light emitting surface 42 a of the second surface light source device 42 are both relative to the normal direction nd of the mirror 30. Inclined from the second surface light source device 42 side in the first direction d ₁ to the mirror 30 side. Then, the angle θ formed by the directions d _wx2 and d _{wy2 in} which the half luminance of the peak luminance is obtained in the angular distribution of the luminance on the light emitting surface 42 a of the second surface light source device 42 with respect to the normal direction nd of the mirror 30. The values of _wx2 and θ _wy2 are greater than −90 ° and less than 0 °.

  In this way, the illuminated mirror including the direction of the peak luminance in the angular distribution of the luminance, and the direction of the angular region capable of securing the luminance more than half of the peak luminance is adjusted with respect to the normal direction nd of the mirror 30 According to the device 10, the subject 5 can be illuminated more brightly by using the illumination light La from the surface light source device 40 with higher utilization efficiency. In addition, the portion of the subject 5 that is projected on the mirror 30 is more effectively suppressed, and the portion of the subject 5 that is projected on the mirror 30 is more effectively suppressed. It is possible to illuminate the entire area with uniform brightness.

Next, a specific example of the surface light source device 40 that can realize the light distribution characteristics described above will be described in detail. 3 to 5 show a specific example of the surface light source device 40 capable of realizing the light distribution characteristics shown in FIG. The first surface light source device 41 and the second surface light source device 42 shown in FIGS. 1 and 2, has a symmetrical structure to each other about a plane perpendicular to the first direction d _1. Therefore, only an example corresponding to the second surface light source device 42 shown in FIGS. 3 to 5 will be described here from the viewpoint of omitting redundant description.

  As shown in FIGS. 3 and 4, the surface light source device 40 is configured as an edge light type surface light source device, and includes a light guide plate 50, a light source 45 disposed on the side of the light guide plate 50, and the light guide plate 50. An optical sheet (prism sheet) 70 and a reflection sheet 49 are disposed to face each other. In the illustrated example, the optical sheet 70 is disposed on the most light exit side, and the light exit surface 71 of the optical sheet 70 forms the light emitting surface 40a.

  In the illustrated example, the light guide plate 50 is generally configured as a quadrangular plate-like member having a pair of main surfaces, and the side surface defined between the pair of main surfaces includes four surfaces. . Similarly, the optical sheet 70 and the reflection sheet 49 are configured as a rectangular plate-like member as a whole.

The light guide plate 50 includes a light exit surface 51 constituted by a main surface on the optical sheet 70 side, a back surface 52 formed of the other main surface facing the light output surface 51, and a side surface extending between the light output surface 51 and the back surface 52. ,have. One side surface of the two surfaces facing the first direction d ₁ of the side surfaces forms a light incident surface 53. As shown in FIGS. 3 and 4, a light source 45 is provided facing the light incident surface 53. The light incident on the light guide plate 50 from the light incident surface 53 is guided substantially along the first direction d ₁ toward the opposite surface 54 facing the light incident surface 53 along the first direction d ₁ that is the light guide direction. The inside of the optical plate 50 is guided. As shown in FIGS. 3 and 4, the optical sheet 70 is disposed so as to face the light exit surface 51 of the light guide plate 50, and the reflection sheet 49 is disposed so as to face the back surface 52 of the light guide plate 50. ing.

The surface light source device 40 are aligned with the lens 30 along the first direction d _1. Then, as shown in FIG. 4, the opposite surface 54 of the light guide plate 50 disposed so as to extend along the first direction d ₁ is disposed on the mirror 30 side, and the light incident surface 53 extends from the mirror 30. It is arranged on the side to be separated. Accordingly, the light emitting source 45 is located on the opposite side to the side facing the mirror 30 in the first direction d light guide plate 50 along _one. That is, the light emitted from the light emission source 45 travels in the direction of approaching the mirror 30 along the first direction d ₁ in the light guide plate 50.

  The light source may be configured in various modes such as a fluorescent lamp such as a linear cold cathode tube, a point LED (light emitting diode), an incandescent lamp, and the like. In the illustrated example, the light source 45 is configured by a large number of point-like light emitters, specifically, a large number of light emitting diodes (LEDs) 46 arranged along the longitudinal direction of the light incident surface 53. Yes. The light emitting diode is not only excellent in energy efficiency, but also advantageous in application to the illuminated mirror device 10 as compared with other light sources such as an organic electroluminescence light source in the following points. First, the light emitting diode 46 having various light distribution characteristics can be obtained at low cost. Therefore, in the combination of the light guide plate 50 and the optical sheet 70, the surface light source device 40 having desired light distribution characteristics can be easily manufactured at low cost. Moreover, the light emitting diode 46 having various spectral characteristics can be obtained at low cost. Accordingly, by selecting the emission spectrum of the light-emitting diode 46 according to the application and use place of the illuminated mirror device 10, for example, by selecting so as to exhibit excellent color rendering properties, the surface light source device 40 can select the subject 5. More effective illumination can be achieved.

  The reflection sheet 49 is a member for reflecting the light leaking from the back surface 52 of the light guide plate 50 so as to enter the light guide plate 50 again. The reflection sheet 49 includes a white scattering reflection sheet, a sheet made of a material having a high reflectance such as metal, a sheet containing a thin film (for example, a metal thin film) made of a material having a high reflectance as a surface layer, and the like. obtain.

The optical sheet 70 is a sheet-like member for correcting the traveling direction of light incident from the light incident side and emitting it from the light output side. In the example shown in FIGS. 3 and 4, the optical sheet 70 includes a sheet-like main body 74 and one direction (arrangement direction) on the sheet surface, specifically, the light incident surface 53 of the light guide plate 50 described above. And a plurality of unit prisms 75 arranged side by side along the first direction d ₁ connecting the opposite surface 54. The unit prisms 75 are arranged on the main body 74 and protrude from the main body 74 toward the light guide plate 50. The unit prism 75 extends linearly on the sheet surface of the optical sheet 70 in a direction orthogonal to the arrangement direction. The unit prism 70 has a triangular cross-sectional shape in a cross section orthogonal to the longitudinal direction. That is, the unit prism 75 is disposed on one side along the first direction d ₁ , more specifically, on one side 76 located on the side away from the mirror 30 and on the other side along the first direction d _1. And the other side surface 77 located. The unit prisms 75 are arranged on the main body 74 without a gap, and the light incident surface 72 of the optical sheet 70 is formed by one side surface 76 and the other side surface 77. On the other hand, the light exit surface 71 of the optical sheet 70 is formed by the main body portion 74.

The size and shape of the optical sheet 70 can be appropriately set in consideration of the size and shape of the light guide plate 50 described later. For example, from the viewpoint of imparting the light distribution characteristics shown in FIG. 6 to the surface light source device 40, as an example, the size and shape of the optical sheet 70 can be set as follows. First, the width Wc (see FIG. 4) of the unit prism 70 can be set to 10 μm or more and 200 μm or less. Further, the protrusion height Hc (see FIG. 4) of the unit prism 75 from the main body 74 along the normal direction to the sheet surface of the optical sheet 70 can be set to 7 μm or more and 150 μm or less. On the other hand, the thickness of the main body 74 can be set to 0.01 mm to 1 mm. Next, the other side surface 77 of the unit prism 75 is intended to change the traveling direction of the light by totally reflecting the light from the light guide plate, as will be described later. And inclination-angle (theta) _c1 (refer FIG. 4) of the other side 77 with respect to the light guide direction of the other side 77 can be set to 15 degrees or more and 45 degrees or less. On the other hand, one side surface 76 of the unit prism 75 is not expected to have an optical function other than functioning as an incident surface of light from the light guide plate, as will be described later. Therefore, it can be designed as long as it does not impair the function of correcting the light traveling direction on the other side surface 77, but it is preferable that the angle be as orthogonal as possible to the incident light angle of the light guide plate.

  By the way, in this specification, terms such as “sheet”, “film”, and “plate” are not distinguished from each other based only on the difference in designation. Therefore, for example, a “sheet” is a concept including a member that can also be called a film or a plate. Similarly, the “unit prism”, “unit element”, “unit shape element”, “unit optical element”, and “unit lens” in the present specification exert an optical action such as refraction and reflection on light, It refers to an element having a function of changing the traveling direction of the light, and is not distinguished from each other based only on the difference in designation.

  Next, the light guide plate 50 will be described in more detail with reference mainly to FIGS. 3 and 4, the light guide plate 50 includes a base portion 60 formed in a plate shape and a plurality of first unit elements 61 formed on the surface of the base portion 60 on the optical sheet 70 side. And a plurality of second unit elements 66 formed on the surface of the base 60 on the reflection sheet 49 side. The base 60 is configured as a flat plate-like member having a pair of parallel main surfaces.

The first unit element 61 will be further described in detail. As is well shown in FIG. 3, the plurality of first unit elements 61 are arranged on the base 60 so as to be arranged in an arrangement direction that intersects the first direction d ₁ and is parallel to the sheet surface of the base 60. ing. Each first unit element 61 extends linearly on the base 60 in a direction intersecting with the arrangement direction.

In a particularly illustrated example, a plurality of first unit elements 61 on the base 60, are arranged side by side without gaps in the array direction perpendicular to the first direction d _1. Therefore, the light exit surface 51 of the light guide plate 50 is composed of the first inclined surface 62 and the second inclined surface 63 formed by the surface of the first unit element 61. Further, each first unit element 61 extends linearly along a first direction d ₁ orthogonal to the arrangement direction. Further, each first unit element 61 is formed in a columnar shape and has the same cross-sectional shape along the longitudinal direction thereof. In the illustrated example, the plurality of first unit elements 61 are configured identically to each other.

In the cross section shown in FIG. 5, that is, a cross section parallel to both the arrangement direction of the first unit elements 61 and the normal direction of the base portion 60 (the direction corresponding to the normal direction of the light guide plate 50 and the normal direction of the mirror 30). Each of the first unit elements 61 has a triangular shape with one side positioned on the base 60 or a shape formed by chamfering the apex angle protruding from the triangular base 60. In the following, the cross section shown in FIG. 5 is also simply referred to as “main cut surface of the light guide plate”. In the example shown in FIG. 5, the cross-sectional shape of each first unit element 61 at the main cutting surface is a shape in which the apex angle of a triangle protruding from the base 60 is chamfered. In the example shown in FIG. 5, the first unit on the main cut surface of the light guide plate is provided for the purpose of providing symmetry to the luminance angular distribution in the plane along the arrangement direction of the first unit elements 61. The cross-sectional shape of the element 61 is symmetric with respect to the normal direction of the base 60 (the direction corresponding to the normal direction of the light guide plate 50 and the normal direction of the mirror 30). Therefore, the two base angles θ _a1 and θ _a2 of the triangular section in the main cut surface are equal to each other.

Next, the second unit element 66 will be described in further detail. As can be understood from FIGS. 3 and 4, the plurality of second unit elements 66 are arranged on the base 60 in the first direction d ₁ and in the arrangement direction parallel to the sheet surface of the base 60. . Each second unit element 66 extends linearly on the base 60 in a direction crossing the arrangement direction.

In particular, in the illustrated example, the plurality of second unit elements 66 are arranged on the base 60 side by side in the first direction d ₁ without a gap. Therefore, the back surface 52 of the light guide plate 50 is formed from the first surface 67 and the second surface 68 that form the surface of the second unit element 62. Further, each of the second unit element 66, along a first direction perpendicular to the direction d _1, and extends linearly. Further, each second unit element 66 is formed in a columnar shape and has the same cross-sectional shape along the longitudinal direction thereof. In the illustrated example, the plurality of second unit elements 66 are configured identically to each other.

In a cross section parallel to both the arrangement direction of the second unit elements 66 and the normal direction of the base 60, each second unit element 66 is formed in a triangular shape with one side positioned on the base 60. The second unit element 66 has a first surface 67 formed as a long side and a second surface 68 formed as a short side. The first surface 67 functions as a reflecting surface for inclining the traveling direction of the light traveling through the light guide plate 50, and promotes the light to be emitted from the light guide plate 50 through the light output surface 51. On the other hand, the second surface 68 is a stepped surface connecting two adjacent first surfaces 67, and is not particularly expected to have an optical function for light traveling in the light guide plate 50. The inclination angle θ _b1 (see FIG. 5) of the first surface 67 with respect to the light guide direction can be set to a relatively small value, for example, 0.2 ° to 2 °. On the other hand, the inclination angle θ _b2 of the second surface 68 with respect to the light guide direction is set to a relatively large value, typically 90 °.

The dimensions of the light guide plate 50 having the above configuration can be set as follows as an example. First, as a specific example of the first unit element 61, the width Wa (see FIG. 5) along the plate surface of the light guide plate 50 can be set to 5 μm or more and 500 μm or less, and the direction normal to the plate surface of the light guide plate 50 The height Ha (see FIG. 5) from the base 60 of the first unit element 61 along the line can be set to 1 μm or more and 250 μm or less. Further, when the cross-sectional shape of the first unit element 61 is a triangle shape or a shape formed by chamfering the apex angle of the triangular shape, the apex angle θ _a3 (see FIG. 5) is set to 90 ° or more and 145 ° or less. It can be. When the cross-sectional shape of the first unit element 61 is a shape formed by chamfering the apex angle of the triangular shape, the top portion of the first unit element 61 has a value of the curvature radius Ra in the main cut surface. It is preferably formed as a curve having a width Wa of 61 or less. As a specific example of the second unit element 66, the width Wb (see FIG. 4) along the plate surface of the light guide plate 50 can be 10 μm or more and 500 μm or less, and along the normal direction to the plate surface of the light guide plate 50. Further, the height Hb (see FIG. 4) of the second unit element 66 from the base portion 60 can be set to 1 μm or more and 50 μm or less. Moreover, the thickness of the base 60 can be 0.1 mm-6 mm.

According to the size and shape of the light guide plate 50 exemplified here, the normal direction of the light guide plate 50 is 0 °, and the light incident surface 53 in the light guide direction from the normal direction of the light guide plate 50, that is, the first direction d ₁ . The angle when tilted toward the negative side is a negative value, and the angle when tilted from the normal direction of the light guide plate 50 toward the opposite surface 54 in the light guide direction is a positive value. In this case, the angle distribution of the luminance has a peak angle at which the luminance is maximized between 65 ° and 80 °, and the luminance is maximized between 65 ° and 75 ° by narrowing the range of the exemplified dimensions. The peak angle can be as follows.

  The light guide plate 50 having the above-described configuration is formed by extrusion molding using a resin molding sheet or by molding the first unit element 61 and the second unit element 66 made of ionizing radiation resin on a base material. Thus, it can be manufactured.

  Next, the operation of the surface light source device 40 having the above configuration will be described.

First, as shown in FIG. 4, the light emitted from the light emitting diode 46 constituting the light source 45 enters the light guide plate 50 via the light incident surface 53. As shown in FIG. 4, most of the light incident on the light guide plate 50 is reflected on the light exit surface 51 and the back surface 52 of the light guide plate 50, particularly due to a difference in refractive index between the material forming the light guide plate 50 and air. repeating total reflection, the light incident surface 53 opposite surface 54 and the light guide direction connecting the light guide plate 50, in particularly the example illustrated advances to the first direction d _1.

However, the back surface 52 of the illustrated light guide plate 50 is configured by the second unit element 66, and the first surface 67 is inclined so as to approach the light exit surface 51 as it goes from the light incident surface 53 to the opposite surface 54. have. The first surface 67 is connected via the second surface 68, and the second surface 68 extends in the normal direction of the light guide plate 50 as an example. Therefore, most of the light traveling in the light guide plate 50 from the light incident surface 53 side to the opposite surface 54 side is reflected by the first surface 67 without entering the second surface 68 of the back surface 52. It becomes like this. Therefore, as shown in FIG. 4, when light travels through the light guide plate 50 while being repeatedly reflected on the light exit surface 51 and the back surface 52, the incident angle of the light on the light exit surface 51 and the back surface 52 gradually decreases. It becomes less than the total reflection critical angle. As a result, the light traveling in the light guide plate 50 is emitted from the light exit surface 51 little by little. According to this method, by adjusting the distribution of the second surface 68, the light amount distribution along the light guiding direction of light emitted from the light exit surface 51 of the light guide plate 50, in the first direction d ₁ in this example It is possible to control the light quantity distribution along, for example, to make the light quantity distribution along the first direction d ₁ uniform.

  By the way, the light exit surface 51 of the light guide plate 50 shown in the figure is constituted by a plurality of first unit elements 61, and the cross-sectional shape of the main cutting surface of each first unit element 61 is chamfered with a triangular shape or a triangular apex angle. It has become a shape. That is, the light exit surface 51 is configured as inclined surfaces 62 and 63 that are inclined with respect to the plate surface of the light guide plate 50 (see FIG. 5). The light that is totally reflected by the inclined surfaces 62 and 63 and travels through the light guide plate 50 and the light that passes through the inclined surfaces 62 and 63 and is emitted from the light guide plate 50 are transmitted from the inclined surfaces 62 and 63 to the following. It comes to have an effect to explain. First, the effect exerted on the light traveling through the light guide plate 50 after being totally reflected by the inclined surfaces 62 and 63 will be described.

  In FIG. 5, the optical paths of the light L51 and L52 traveling through the light guide plate 50 while repeating total reflection on the light exit surface 51 and the back surface 52 are shown in the main cut surface of the light guide plate. As described above, the inclined surfaces 62 and 63 forming the light exit surface 51 of the light guide plate 50 are formed by the outer surface of the first unit element 61 having a cross-sectional shape formed by chamfering a triangular apex angle. And includes two types of surfaces inclined to opposite sides with respect to the normal direction of the base 60. Further, the two types of inclined surfaces 62 and 63 inclined in the opposite directions are alternately arranged along the arrangement direction of the first unit elements 61. As shown in FIG. 5, the light L51 and L52 that travel in the light guide plate 50 toward the light exit surface 51 and enter the light exit surface 51 are often guided out of the two types of inclined surfaces 62 and 63. The light beam is incident on an inclined surface that is inclined to the opposite side of the traveling direction of the light with respect to the normal direction of the base portion 60 as a reference.

As a result, as shown in FIG. 5, the light L51 and L52 traveling in the light guide plate 50 is totally reflected by the inclined surfaces 62 and 63 of the light exit surface 51, in many cases along the arrangement direction of the first unit elements 61. Further, the component is reduced, and further, the traveling direction of the main cut surface is directed to the opposite side with respect to the normal direction of the light guide plate. In this way, the inclined surfaces 62 and 63 forming the light exit surface 51 of the light guide plate 50 restrict the light emitted radially at a certain light emitting point from continuing to spread in the arrangement direction of the first unit elements 61 as it is. . That is, light that is emitted from the light emitting diode 46 of the light source 45 in a direction greatly inclined with respect to the first direction and is incident on the light guide plate 50 is mainly guided while the movement of the first unit elements 61 in the arrangement direction is restricted. will proceed to the first direction d ₁ is the optical direction. Thereby, the light distribution characteristic along the arrangement direction of the first unit elements 61 of the light emitted from the light exit surface 51 of the light guide plate 50, for example, the light quantity distribution, the configuration of the light source 45 (for example, the arrangement of the light emitting diodes 46), Adjustment can be made according to the output of the light emitting diode 46.

  Next, the effect exerted on the light that passes through the light exit surface 51 and exits from the light guide plate 50 will be described. As shown in FIG. 5, the lights L <b> 51 and L <b> 52 emitted from the light guide plate 50 through the light exit surface 51 are refracted on the light exit side surface of the first unit element 61 that forms the light exit surface 51 of the light guide plate 50. Due to this refraction, the traveling direction (outgoing direction) of the light L51 and L52 traveling in the direction inclined from the normal direction of the light guide plate on the main cut surface is mainly the light traveling direction when passing through the light guide plate 50. As compared with the above, the light guide plate 50 is bent so that the angle formed with respect to the normal line direction is small. With such an action, the first unit element 61 can narrow the traveling direction of the transmitted light to the normal direction side of the light guide plate 50 with respect to the light component along the direction orthogonal to the light guide direction. That is, the first unit element 61 exerts a condensing action on the light component along the direction orthogonal to the light guide direction, that is, the arrangement direction of the first unit elements 61. In this way, the emission angle of the light emitted from the light guide plate 50 is a narrow angle range centered on the normal direction of the light guide plate 50 in a plane parallel to the arrangement direction of the first unit elements 61 of the light guide plate 50. It is narrowed down in.

In addition, the light that enters the light guide plate 50 from the light emitting diode 46 of the light source 45 has a lot of light that travels inclined with respect to the first direction d ₁ that is the light guide direction in the observation from the normal direction of the light guide plate. include. In particular, when the light emitting source 45 is configured as a set of light emitting diodes 46 that are point light emitters instead of linear cold cathode tubes, light is emitted radially from the light emitting diodes 46 in a plan view of the light guide plate 50. light traveling in large inclined direction with respect to the first direction d ₁ is a light guide direction, so there are many. When the light exit surface 51 of the light guide plate 50 is formed as the inclined surfaces 62 and 63 inclined with respect to the plate surface of the light guide plate 50, the light guide surface 51 is guided as compared with the case where the light exit surface 51 is a flat surface. the incident angle from the first direction d ₁ in the observation from the normal direction of the optical plate 50 to the light exit surface 51 of the light traveling in a direction inclined easily reduced. That is, when the light exit surface 51 is formed as the inclined surfaces 62 and 63 inclined with respect to the plate surface, the light traveling in the light guide plate 50 is likely to enter the light exit surface 51 at an angle less than the total reflection critical angle. . As a result, when the light exit surface 51 is formed as the inclined surfaces 62 and 63 inclined with respect to the plate surface, extraction of light traveling through the light guide plate 50 from the light exit surface 51 is promoted.

As described above, the emission angle of the light emitted from the light guide plate 50 is a narrow angle range centered on the normal direction of the light guide plate 50 on a plane parallel to the arrangement direction of the first unit elements 61 of the light guide plate 50. It is narrowed down in. On the other hand, the emission angle of the light emitted from the light guide plate 50 is in a plane parallel to the first direction d ₁ due to the fact that it has traveled mainly in the first direction d ₁ until then. In this case, the light emitting plate 50 has a relatively large emission angle that is relatively largely inclined from the normal direction of the light guide plate 50. Specifically, the emission angle of the first direction component of the light emitted from the light guide plate 50, that is, the angle formed by the first direction component of the emitted light and the normal direction of the light guide plate 50 is a relatively large angle. There is a tendency to deviate within the angular range. For example, as already described, in the light guide plate having the above-described exemplary shapes and dimensions, 65 ° or more and 80 ° or less (and 65 ° or more and 75 ° or less) with respect to the normal direction to the plate surface of the light guide plate 50. ) In such a range that the peak luminance is generated.

The light finally emitted from the light guide plate 50 as described above enters the optical sheet 70 as shown in FIG. As described above, the optical sheet 70 includes the unit prism 75 having a triangular cross section whose apex angle projects toward the light guide plate 50 side. 4 As seen in the longitudinal direction of the unit prisms 75 is a direction intersecting the first direction d ₁ by the light guide plate 50, and a direction perpendicular to the guiding direction especially in this embodiment, in parallel with It has become. Further, due to the refractive index difference between the material forming the light guide plate 50 and air, the emission angle of the first direction component of the light emitted from the light exit surface 51 of the light guide plate 50, that is, the first direction component of the emitted light and the light guide plate. The angle formed by the normal direction nd to the plate surface of 50 tends to be biased within a specific angle range (for example, 65 ° to 85 °).

  From these things, as shown in FIG. 4, most of the light emitted from the light exit surface 51 of the light guide plate 50 passes through one side 76 of the unit prism 75 of the optical sheet 70 and enters the unit prism 75. Thereafter, the optical sheet 70 can be designed so as to be totally reflected by the other side surface 77 of the unit prism 75. The light distribution characteristics of light emitted from the light emitting surface 40a of the surface light source device 40 constituted by the light emitting surface 71 of the optical sheet 70 due to total reflection at the other side surface 77 of the unit prism 75, more specifically, a surface light source. It becomes possible to adjust the angular distribution of luminance on the light emitting surface 40a of the device 40 to a desired profile. As a result, as described above, the subject 5 to be imaged on the mirror 30 can be effectively illuminated by the illumination light La from the surface light source device 40.

As described above, according to the present embodiment, the angular distribution in the plane parallel to both the normal direction nd and the first direction d ₁ of the mirror 30 with respect to the luminance on the light emitting surface 40a of the surface light source device 40. The direction in which peak luminance is exhibited is inclined from the surface light source device 40 side to the mirror 30 side in the first direction d _{1 with} respect to the normal direction nd of the mirror 30. Therefore, the subject 5 to be photographed on the mirror 30 can be illuminated with sufficient brightness and uniformity. As a result, the reflection of the subject 5 on the mirror 30 can be effectively improved.

  In the above-described embodiment, the surface light source device 40 is configured as an edge light type. Accordingly, the thickness of the surface light source device 40 can be reduced to a thickness that can be harmonized with the mirror 30, and light distribution characteristics having very strong directivity can be imparted to the surface light source device 40. .

  Note that various modifications can be made to the above-described embodiment. Hereinafter, an example of modification will be described with reference to the drawings. In the drawings used in the following description, the same reference numerals as those used for the corresponding parts in the above-described embodiment are used, and redundant descriptions are omitted.

  In the embodiment described above, examples of the use of the illuminated mirror device 10 include a mirror for a restroom, a mirror for a fitting room, a mirror of a beauty salon or a barber shop, a mirror of a cosmetics department, and the like. However, the use of the illuminated mirror device 10 is not limited to these uses, and can be applied to various uses such as a figure installed in various places, a mirror for a bathroom, and the like. Further, the illuminated mirror device 10 is not limited to a form used on a wall or the like, and as shown in FIGS. 7 and 8, the support element 20 has a stand 22 so that it can be used on a table, for example. Alternatively, as shown in FIGS. 9 and 10, the mobile phone may be configured to be portable.

The support element 20 of the mirror apparatus with illumination 10 shown in FIG. 7 includes a frame structure 21 and a stand 22 that supports the frame structure 21 in a movable manner. The frame structure 21 supports the mirror 30 and the first surface light source device 41 and the second surface light source device 42 located on both sides of the mirror 30 along the first direction d ₁ . The frame structure 21 may be supported so as to be uniaxially or multiaxially rotatable with respect to the stand 22, or may be supported so as to be slidable in the vertical direction with respect to the stand 22. If the frame structure 21 is rotatable with respect to the stand 22, the surface light source device 40 can be arranged on the side, top, and bottom of the mirror 30, and the subject 5 can be effectively used depending on the situation. It becomes possible to illuminate.

  A support element 20 of the illuminated mirror device 10 shown in FIG. 8 includes a frame structure 21 and a stand 22 that is swingably connected to the frame structure 21. By rotating the frame structure 21 relative to the stand 22, the direction of the mirror 30 supported by the frame structure 21 can be adjusted. In the example shown in FIG. 8, the frame structure 21 is formed in a circumferential shape surrounding the mirror 30. The surface light source device 40 is accommodated in the frame structure 21 and is located on the side of the mirror 30. In this example, the first to fourth surface light source devices 41 to 44 are supported by the frame structure 21. In the illuminated mirror device 10 shown in FIG. 8, the mirror 30 is held back-to-back with the auxiliary mirror 38 disposed on the back side thereof, and constitutes a mirror unit 37 together with the auxiliary mirror 38. The mirror unit 37 is supported so as to be rotatable with respect to the frame structure 21, and the subject 5 is projected onto the mirror 30 or the auxiliary mirror 38 by rotating the mirror unit 37 with respect to the frame structure 21. Is possible. As an example, the mirror 30 can be configured as a normal plane mirror, and the auxiliary mirror 38 can be configured as a magnifying mirror.

  The support element 20 of the illuminated mirror device 10 shown in FIGS. 9 and 10 is disposed between the support plate portion 24b, the bottom plate portion 24c, the support plate portion 24b, and the bottom plate portion 24c. A back plate portion 24a swingably connected to each of the bottom plate portions 24c. The support plate portion 24b supports the mirror 30 and the first surface light source device 41 and the second surface light source device 42 that are located on the side of the mirror 30 along the first direction d1. In this illuminated mirror device 10, the back plate 24a, the support plate 24b and the bottom plate 24c are swung with respect to each other in the use state shown in FIG. 9 and the portable state shown in FIG. The illuminated mirror device 10 can be deformed.

In the above-described embodiment, an example in which one or more surface light source devices 40 are arranged around one mirror 30 has been described. Not limited to this example, two or more mirrors 30 may be arranged around one surface light source device 40. In the example shown in FIG. 11, the first mirror 31 and the second mirror 32 are arranged at positions on both sides of the surface light source device 40 along the first direction d ₁ , respectively. In the illuminated mirror device 10 of FIG. 11, one surface light source device 40 is effective for both the first subject 5 a to be projected on the first mirror 31 and the second subject 5 b to be projected on the second mirror 32. Can be illuminated.

FIG. 12 shows an angular distribution dc regarding the luminance on the light emitting surface 40a of the surface light source device 40 shown in FIG. Angular distribution dc luminance shown in the graph of FIG. 12 are those measured in a plane parallel to the first direction d _1. In particular, in the illuminated mirror device 10 shown in FIG. 11, the first mirror 31 and the second mirror 32 are arranged so that the plate surface of the first mirror 31 and the plate surface of the second mirror 32 are parallel to each other. The angular distribution dc of luminance shown in the graph of FIG. 12 is measured on a plane parallel to both the first direction d ₁ and the normal direction nd of each mirror 30. In the graph of FIG. 12, the vertical axis indicates the luminance, and the horizontal axis indicates the angle at which the luminance is measured. The angle value is 0 ° in the direction parallel to the normal direction nd of the mirrors 31 and 32, and the angle when tilted clockwise with respect to the normal direction nd is a positive value. The angle when tilted counterclockwise with respect to the normal direction nd is a negative value.

As shown in FIG. 12, the angular distribution dc in a surface parallel to the first direction d ₁ of the luminance on the light emitting surface 40a of the surface light source device 40, a first peak brightness and the second peak brightness Appears. In particular, in the example shown in FIG. 12, the first peak luminance and the second peak luminance have the same luminance value.

The direction d _pa exhibiting the first peak luminance is inclined from the surface light source device 40 side to the first mirror 31 side in the first direction d _{1 with} respect to the normal direction nd to the first mirror 31. The value of the angle θ _pa formed by the direction d _pa with respect to the normal direction nd of the first mirror 31 is greater than −90 ° and less than 0 °. Further, the direction d _pb exhibiting the second peak luminance is inclined from the surface light source device 40 side in the first direction d ₁ to the second mirror 32 side with respect to the normal direction nd to the second mirror 32. The value of the angle θ _pb formed by the direction d _pb with respect to the normal direction nd of the second mirror 32 is greater than 0 ° and less than 90 °. According to such a light distribution characteristic of the surface light source device 40, unevenness in brightness occurs in the portions of the first subject 5a and the second subject 5b projected on the mirror 30 by the light from one surface light source device 40. The portion projected on the mirror 30 of the first subject 5a and the second subject 5b can be illuminated with a sufficiently uniform brightness as a whole.

Further, in a plane parallel to the first direction d ₁ of the luminance on the light emitting surface 40a of the surface light source device 40 in the angular distribution dc, the and the first peak brightness includes direction d _pa exhibiting a first peak brightness The width θ _wa of the angle region where more than half of the luminance can be obtained is 10 ° or more and 70 ° or less, including the direction d _pb exhibiting the second peak luminance, and more than half of the second peak luminance can be obtained. The angle range of the angle _θwb is 10 ° or more and 70 ° or less. According to such a light distribution characteristic of the surface light source device 40, shade and brightness unevenness are present in the portions of the first subject 5a and the second subject 5b that are projected onto the mirror 30 by the light from one surface light source device 40. While effectively suppressing the occurrence, the portions of the first subject 5a and the second subject 5b projected on the mirror 30 can be illuminated as a whole with sufficiently uniform brightness.

Further, the angle distribution dc in the plane parallel to the first direction d ₁ with respect to the luminance on the light emitting surface 40 a of the surface light source device 40 includes a direction d _pa that exhibits the first peak luminance and has the first peak luminance. angle range more than half of the luminance can be obtained is in the range inclined from the side of the surface light source device 40 in the first direction d ₁ to the side of the first mirror 31. Especially, in a plane parallel to the first direction d ₁ of the luminance on the light emitting surface 40a of the surface light source device 40 in the angular distribution dc, the and the first peak brightness includes direction d _pa exhibiting a first peak brightness The directions d _wxa and d _{wya that} are the _{outermost sides} of the angle range in which more than half of the luminance is obtained are both the normal direction nd of the first mirror 31 and the surface light source device 40 in the first direction d ₁ . It inclines from the side to the first mirror 31 side. Similarly, in the angular distribution dc in a plane parallel to the first direction d ₁ of the luminance on the light emitting surface 40a of the surface light source device 40, and the second peak brightness includes direction d _pb exhibiting a second peak brightness An angle range in which a luminance of more than half of the angle is obtained is in a range inclined from the surface light source device 40 side to the second mirror 32 side in the first direction d ₁ . Especially, in a plane parallel to the first direction d ₁ of the luminance on the light emitting surface 40a of the surface light source device 40 in the angular distribution dc, the and second peak intensity includes direction d _pb exhibiting a second peak brightness Both the directions d _wxb and d _{wyb that} are the outermost angles of the angular range in which more than half of the luminance can be obtained are relative to the normal direction nd of the second mirror 32 and the surface light source device 40 in the first direction d ₁ . It inclines from the side to the second mirror 32 side. According to such a light distribution characteristic of the surface light source device 40, the light from one surface light source device 40 causes shadows in the portions of the first subject 5 a and the second subject 5 b that are projected on the mirror 30. Illuminating the portions of the first subject 5a and the second subject 5b projected on the mirror 30 with more uniform brightness as a whole while more effectively suppressing both the occurrence of uneven brightness. Can do.

  The light distribution characteristics shown in FIG. 12 can be realized by the surface light source device 40 shown in FIG. 13 as an example. In the surface light source device 40 shown in FIG. 13, the opposite surface 54 of the light guide plate 50 forms a second light incident surface, and faces the opposite surface 54 of the light guide plate 50 that forms the second light incident surface. Except that the second light-emitting source 47 is provided, the cross-sectional shape of the second unit element 66 of the light guide plate 50 is different, and the cross-sectional shape of the unit prism 75 of the optical sheet 70 is different. The surface light source device shown in FIGS. 3 to 5 can be configured in the same manner. The second light source 47 can be configured in the same manner as the light source 45 except that the arrangement position is different. In the second unit element 66 of the light guide plate 50, the second surface 68 may be configured as a surface symmetrical to the first surface 67 with the normal direction of the light guide plate 50 as the center. In this case, the first surface 67 of the light guide plate 50 changes the traveling direction of the light from the light emitting source 45 and promotes the emission of the light from the light guide plate 50 through the light output surface 51. On the other hand, the second surface 68 of the light guide plate 50 changes the traveling direction of the light from the second light emitting source 47 and promotes the light to be emitted from the light guide plate 50 through the light output surface 51. Further, in the unit prism 75 of the optical sheet 70, the one side surface 76 can be configured as a surface symmetrical to the other side surface 77 with the normal direction of the light guide plate 50 as the center. In this case, one side surface 76 of the optical sheet 70 mainly functions as an incident surface of the light from the light emission source 45 to the optical sheet 70, and the light from the second light emission source 47 is totally reflected to advance the light. It functions as a surface that deflects the direction. On the other hand, the other side surface 77 of the optical sheet 70 mainly functions as an incident surface of the light from the second light emitting source 47 to the optical sheet 70, and totally reflects the light from the light emitting source 45 to travel the light. It functions as a surface that deflects.

Further, in the above-described embodiment, the example in which the surface 34 of the mirror 30 and the light emitting surface 40a of the surface light source device 40 are arranged on the same surface is shown, but the present invention is not limited to this. For example, as shown in FIG. 15, the mirror 30 may be disposed on a part of the surface of the surface light source device 40. In the example shown in FIG. 15, a portion of the surface of the surface light source device 40 on which the mirror 30 is disposed that is not covered by the mirror 30 forms a light emitting surface 40 a. In particular, in the example shown in FIG. 15, the light emitting surfaces 40 a are located at positions on both sides of the mirror 30 along the first direction d ₁ . By designing the light distribution characteristics of the illumination light La from the light emitting surface 40a as described above, the subject is effectively illuminated by the illumination light La from each of the light emitting surfaces 40a located on both sides of the mirror 30. It becomes possible.

  Furthermore, it is possible to change the structure of the surface light source device 40 shown in FIGS. 3 to 5 described in the above embodiment.

  For example, in the above-described embodiment, the back surface 52 of the light guide plate 50 is formed by the first surface 67 and the second surface 68 of the second unit element 66, and light traveling in the light guide plate 50 is reflected by the first surface 67. By doing so, the extraction of light from the light guide plate 50 via the light output surface 51 is promoted, but the present invention is not limited to this example. First, in the above-described embodiment, the configuration for extracting light from the light guide plate 50 includes the first surface 67 having the inclined back surface 52. However, the configuration for extracting light from the light guide plate 50 is this example. Not limited to.

  For example, as shown in FIG. 14, the base portion 60 of the light guide plate 50 has a main portion 60a made of resin and a diffusion component 60b dispersed in the main portion 60a. The diffusion component 60b here is a component that can act on the light traveling in the base portion 60 by changing the path direction of the light by reflection or refraction. Such a light diffusing function (light scattering function) of the diffusing component 60b can be achieved, for example, by configuring the diffusing component 60b from a material having a refractive index different from that of the material forming the main portion 60a, or with respect to light. It can be applied by constructing the diffusing component 60b from a material that can exert a reflective action. Examples of the diffusion component 60b having a refractive index different from that of the material forming the main portion 60a include a metal compound, a porous substance containing a gas, and simple bubbles.

In the light guide plate 50 shown in FIG. 14, the light traveling in the light guide plate 50 has its traveling direction irregularly changed by the diffusion component 60 b and is incident on the light exit surface 51 at an incident angle less than the total reflection critical angle. There is also. In this case, the light can be emitted from the light exit surface 51 of the light guide plate 50. The collision between the light traveling in the light guide plate 50 and the diffusion component 60b dispersed in the light guide plate 50 occurs in each section in the light guide plate 50 along the light guide direction. For this reason, the light traveling in the light guide plate 50 is gradually emitted from the light exit surface 51. Therefore, by adjusting the distribution of diffuse component 60b of the light guide plate 50, the light amount distribution along the light guiding direction of light emitted from the light exit surface 51 of the light guide plate 50, in this embodiment the first direction d ₁ It is possible to control the light quantity distribution, for example, to make the light quantity distribution along the first direction d ₁ uniform.

  In the example shown in FIG. 14, the back surface 52 of the light guide plate 50 is formed as a flat surface. However, the present invention is not limited to this, and the light guide plate 50 includes the second unit element 66 and the back surface 52 is inclined. One surface 67 may be included.

  Furthermore, the present invention is not limited to the above-described embodiment and the example illustrated in FIG. 14, and another configuration for emitting light incident on the light guide plate 50 from the light guide plate 50 is used instead of the above-described configuration or as described above. In addition to the configuration, it can be adopted. Examples of the light extraction configuration other than the configuration in which the inclined first surface 67 is provided on the back surface 52 and the configuration in which the diffusion component 60b is dispersed in the base 60 include, for example, a configuration in which at least one of the light exit surface 51 and the back surface 52 is a rough surface. And a configuration in which a pattern of a white scattering layer is provided on the back surface 52. In the above-described embodiment, the back surface 52 of the light guide plate 50 has the inclined first surface 67 and the second surface 68 extending in the normal direction. However, the present invention is not limited to this. The two surfaces 68 may be omitted, and the back surface 52 of the light guide plate 50 may be configured as one continuous flat inclined surface or one continuous curved surface.

  Further, in the above-described embodiment, an example in which the light emitting source 45 includes a plurality of point light sources arranged along the light incident surface 51 of the light guide plate 50, specifically, the light emitting diode 46 is shown. The light source 45 is composed of various light sources that can be used in an edge light type surface light source device, for example, a cold cathode tube arranged to extend in parallel with the light incident surface 51 of the light guide plate 50. May be.

  Furthermore, in the above-described embodiment, the example in which the cross-sectional shape of the first unit element 61 of the light guide plate 50 is a triangular shape has been described, but the present invention is not limited thereto. The cross-sectional shape of the first unit element 61 may be a shape other than a triangular shape, for example, various polygonal shapes such as a quadrangle such as a trapezoid, a pentagon, or a hexagon. Further, the cross-sectional shape of the unit shape element 55 may have a shape corresponding to a part of a circle or an ellipse. In the first place, the first unit element 61 may be omitted from the light guide plate 50.

  Furthermore, in the above-described embodiment, an example of the optical sheet 70 disposed on the light output side of the light guide plate 50 has been described, but the above-described optical sheet 70 is merely an example. Instead of the optical sheet 70 described above, various forms of optical sheets can be used. For example, an optical sheet in which a unit prism protrudes on the light output side can be used. An optical sheet in which the unit prism 75 has a cross-sectional shape other than a triangular shape, for example, a shape corresponding to a polygon other than a triangle or a part of an ellipse, or the like can also be used. If the light distribution characteristic of the light emitted from the light exit surface 51 of the light guide plate 50 can be adjusted by appropriately designing the configuration of the light guide plate 50, the optical sheet 70 may be omitted from the surface light source device 40. Is possible.

  Furthermore, the configuration of the surface light source device 40 described above is merely an example, and various modifications can be made. For example, a light diffusing sheet having a function of diffusing transmitted light may be incorporated in the surface light source device 40. Further, the surface light source device 40 does not have to be an edge light type, and may be configured as a direct type surface light source device. In the case of a direct type surface light source device, in order to obtain directivity, one prism sheet arranged such that the prism surface is opposite to the light source or the prism ridges are orthogonal Directivity can be obtained by stacking two sheets in the arrangement.

  In addition, although the some modification with respect to embodiment mentioned above was demonstrated above, naturally, it is also possible to apply combining several modifications suitably.

DESCRIPTION OF SYMBOLS 10 Mirror apparatus 20 with illumination Support element 30 Mirror 31 1st mirror 32 2nd mirror 34 Surface, mirror surface, reflective surface 40 Surface light source device 40a Light emitting surface 41 First surface light source device 42 Second surface light source device 43 Third surface light source device 44 Fourth surface light source device 45 Light source 46 Light emitting diode 50 Light guide plate 70 Optical sheet

Claims (9)

With a mirror,
A surface light source device positioned at least at a position on the side of the mirror along a certain direction,
The direction of peak luminance in the angular distribution in a plane parallel to both the normal direction of the mirror and the one direction with respect to the luminance on the light emitting surface of the surface light source device is the normal direction of the mirror On the other hand, an illuminated mirror device that is inclined from the surface light source device side to the mirror side in the one direction.   The said surface light source device is a mirror apparatus with illumination of Claim 1 which has a light-guide plate and the light emitting diode arrange | positioned in the position which faces the said light-guide plate. The first surface light source device and the second surface light source device are respectively disposed at positions on both sides of the mirror along the one direction.
The direction of the peak luminance in the angular distribution in the plane parallel to both the normal direction of the mirror and the one direction with respect to the luminance on the light emitting surface of the first surface light source device is the mirror method. Inclining from the side of the first surface light source device in the one direction to the side of the mirror with respect to the line direction,
The direction of the peak luminance in the angle distribution in the plane parallel to both the normal direction of the mirror and the one direction with respect to the luminance on the light emitting surface of the second surface light source device is the mirror method. The illuminated mirror device according to claim 1, wherein the mirror device is inclined with respect to a line direction from the second surface light source device side to the mirror side in the one direction. The first mirror and the second mirror are arranged at positions on both sides of the surface light source device along the one direction, respectively.
A first peak luminance and a second peak luminance are generated in an angular distribution in a plane parallel to the one direction with respect to the luminance on the light emitting surface of the surface light source device,
The direction exhibiting the first peak luminance is inclined from the surface light source device side in the one direction to the first mirror side with respect to the normal direction to the first mirror,
The direction of exhibiting the second peak luminance is inclined from the surface light source device side in the one direction to the second mirror side with respect to the normal direction to the second mirror. The mirror apparatus with illumination as described in any one of 1-3.   The mirror device with illumination according to claim 1, wherein the surface light source device is movable with respect to the mirror.   The illuminated mirror device according to any one of claims 1 to 5, wherein the surface light source device is removable from the illuminated mirror device.   The illuminated mirror according to any one of claims 1 to 6, wherein a direction in which the peak luminance is present and an angle formed with respect to a normal direction of the mirror is 15 ° or more and 75 ° or less. apparatus.   The angle distribution in the plane parallel to both the normal direction of the mirror and the one direction with respect to the luminance on the light emitting surface of the surface light source device includes the direction exhibiting the peak luminance and the peak luminance The illuminated mirror device according to any one of claims 1 to 7, wherein a width of an angle region in which a luminance of more than half of the angle is obtained is 10 ° or more and 70 ° or less.   The angle distribution in the plane parallel to both the normal direction of the mirror and the one direction with respect to the luminance on the light emitting surface of the surface light source device includes the direction exhibiting the peak luminance and the peak luminance The angle region in which a luminance of more than half of the angle is obtained is in a range inclined from the surface light source device side to the mirror side in the one direction with respect to the normal direction of the mirror. The mirror apparatus with illumination as described in any one of.

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