JP6287586B2 - Light emitting device - Google Patents

Description

  The present invention relates to a light emitting device.

  The electronic device is provided with a light emitting unit called an indicator or the like for allowing the user to recognize the state of the device by lighting or blinking. Such light emitting units are provided at a plurality of locations on the surface of the casing of the electronic device, and each of them switches the state to lighting, blinking, or extinguishing, and allows the user to recognize the state of the device. The light emitting unit is not configured in a state where a light source such as an LED is directly exposed on the surface of the casing of the electronic device, but the light emitted from the light source disposed inside the electronic device is placed at a predetermined position on the surface of the casing. In some cases, one end of the light guide member that leads to the predetermined position is faced.

A laser generator that emits linearly polarized laser light; a phosphor that is irradiated with the laser light from the laser generator; and an optical member that is disposed in a passage region of the laser light emitted from the laser generator. An optical member includes a light guide member having a laser light incident surface and a laser light output surface, and a light emitting device in which a reflective polarizing filter is formed on at least one of the laser light incident surface and the laser light output surface of the light guide member is known. (See Patent Document 1).
Also, two light guides converging one end side and branching the other end side into two and facing each other with the object to be illuminated on the outer side surface along the longitudinal direction of each light guide Two light guides that form light reflecting means or light diffusing means and whose inner side surface is a light emitting surface, and one light emission arranged facing the end surface of one converged end of the two light guides Each light guide including a diode, and a filter formed by dispersing phosphors or phosphors disposed on the light emitting diode side from the one end side of each light guide or the light reflecting means or the light diffusing means. An illumination device is known in which a filter or phosphor that emits light of different wavelengths when receiving light from a light emitting diode is dispersed (see Patent Document 2).

JP 2011-249538 A Patent No. 4688717

  As described above, when a plurality of light emitting units are provided on the surface of the casing of the electronic device, there is a problem that light emitted from one light emitting unit leaks to another light emitting unit through the light guide member. When there is such light leakage, for example, a light emitting portion that should be turned off originally appears slightly shining, or a certain light emitting portion appears to shine in a color different from the original light emission color. Note that none of the above-mentioned documents solves the leakage of light when such a plurality of light emitting portions exist.

  The present invention has been made to solve at least the above-described problems, and provides a light-emitting device that eliminates unnecessary light leakage.

  In one aspect of the present invention, a light-emitting device integrally includes a plurality of light guides having a light source, an incident surface on which light emitted from the light source is incident, and an exit surface that emits light incident on the incident surface. A light guide member formed on the light incident path, an incident-side restriction unit that is provided on the light incident surface side of each light guide path and restricts the characteristics of light incident on the light incident surface to different characteristics for each light incident surface, and each light guide path And an emission side restriction unit that restricts the characteristics of light emitted from the emission surface to the characteristics of light incident on the incident surface sharing the light guide path.

  According to this aspect, only light having limited characteristics is incident on the incident surface of a light guide through the incident-side limiting unit provided corresponding to the incident surface, and the incident surface and From the exit surface sharing the light guide path, only light whose characteristics are limited to the same characteristics as the light incident on the entrance surface is emitted through the exit-side restricting portion provided corresponding to the exit surface. Therefore, in the situation where a plurality of light guide paths are integrally formed as described above, light to be emitted from a certain emission surface (a part that is visually recognized by the user as one of the light emitting units (indicators)) is emitted from the other emission surface. It is reliably prevented from being emitted from the light (the above-mentioned light leakage).

  In one aspect of the present invention, the light-emitting device includes a light source and a plurality of light guide paths each having an emission surface for emitting light while sharing an incident surface on which light emitted from the light source is incident. Light guide member formed on the incident surface side of the light guide path, an incident light variable portion that can change the characteristics of light incident on the incident surface, and an output surface side of each light guide path And an exit-side restricting unit that restricts the characteristics of the light emitted from the exit surface to any one of the characteristics that can be changed by the incident light variable unit and is different for each of the exit surfaces.

  According to this aspect, the light whose characteristics are limited by the incident light variable unit that can change the characteristics of the light incident on the incident surface is incident on the incident surface shared by the plurality of light guide paths, and for each light guide path. From the exit surface, the characteristics are limited to the characteristics that can be changed by the incident light variable section and are different for each exit surface through the exit-side restricting section provided corresponding to the exit surface. Only light is emitted. Therefore, in the situation where a plurality of light guide paths are integrally formed as described above, it is ensured that light to be emitted from one emission surface is emitted from another emission surface (the above-described light leakage). Is prevented.

  The technical idea of the present invention may be realized by a mode other than the light emitting device record. For example, processing realized by the light emitting device can be regarded as a method invention. In addition, an electronic device including a light-emitting device in part can be regarded as one invention.

FIG. 14 is a perspective view illustrating part of an electronic device including a light-emitting device. The perspective view which shows the light guide member of 1st Example. The perspective view which shows the light-emitting device of 1st Example. The perspective view which shows the light-emitting device of 2nd Example. The perspective view which shows the light-emitting device of 3rd Example. The perspective view which shows the light-emitting device of 4th Example. The perspective view which shows the light-emitting device of 5th Example. The perspective view which shows the light-emitting device of 6th Example.

As an embodiment of the present invention, the light characteristic may be polarization or wavelength.
In addition, as an embodiment of the present invention, the incident side restriction portion provided on one incident surface side, and the emission side restriction portion provided on the emission surface side sharing the light guide path with the incident surface, May be a polarization filter (or wavelength filter) that restricts the polarization (or wavelength) of light to pass to a common polarization (or wavelength).
Further, as an embodiment of the present invention, the incident-side limiting unit for each incident surface includes at least a plurality of light sources that emit light having different polarization states (or wavelengths) from each other. It may be included.

Hereinafter, embodiments of the present invention will be further described with reference to the drawings.
(Outline of the device)
FIG. 1 illustrates a part of an electronic device 100 including a light emitting device 10 as a perspective view. The electronic device 100 may be any product that requires an indicator on the surface of the housing. For example, a television, a recorder, a PC (personal computer), a mobile device, other communication devices, AV devices, and storage devices. Etc. The light emitting device 10 is accommodated in the electronic device 100, and a part (the emission surface 23) thereof is exposed to the outside through a hole formed in the housing 101 of the electronic device 100. That is, the emission surface 23 is an indicator that is visually recognized by the user from the outside of the electronic device 100.
Below, the example of the light-emitting device 10 included in this invention is demonstrated.

(First embodiment)
FIG. 2 illustrates the light guide member 20 according to the first embodiment in a perspective view, and FIG. 3 illustrates the light emitting device 10 according to the first embodiment in a perspective view. The light emitting device 10 includes a light guide member 20 and a light source 30. The light guide member 20 is formed by integrally forming a plurality of light guide paths 21 (21a, 21b), and is entirely made of a material such as a transparent resin. In the light guide member 20 shown in FIGS. 2 and 3, two light guide paths 21 a and 21 b are connected by a connecting portion 26. By integrally molding the plurality of light guide paths 21 with the material as described above, the cost of manufacturing the plurality of light guide paths 21 can be suppressed.

  The light sources 30 (30a, 30b) are light emitting elements such as LEDs (Light Emitting Diodes), for example, and are provided according to the number of light guide paths 21. In the example of FIG. 3, a light source 30a is provided corresponding to the light guide path 21a, and a light source 30b is provided corresponding to the light guide path 21b. The light guide path 21 has incident surfaces 22 (22a, 22b) on which light emitted from the light source 30 is incident on both ends, and emission surfaces 23 (23a, 23b) that emit light incident on the incident surface 22. In the example of FIGS. 2 and 3, the light guide path 21a has an incident surface 22a on which light emitted from the light source 30a is incident and an output surface 23a that emits light incident on the incident surface 22a, and the light guide path 21b is a light source. It has the incident surface 22b which injects the light which 30b emits, and the output surface 23b which radiate | emits the light which injected into the incident surface 22b.

  As shown in FIG. 3, when focusing on the light guide path 21a, a polarizing filter 24a is provided on the incident surface 22a, and a polarizing filter 25a is provided on the output surface 23a. When attention is paid to the light guide path 21b, a polarizing filter 24b is provided on the incident surface 22b, and a polarizing filter 25b is provided on the output surface 23b. Each of such polarizing filters is a polarizing film deposited on the target surface or a polarizer attached to the target surface, and allows the linearly polarized light component to pass therethrough.

  The polarizing filters 24 a and 24 b are examples of an “incident side limiting unit” that is provided on the incident surface 22 side of each light guide path 21 and restricts the characteristics of light incident on the incident surface 22 to different characteristics for each incident surface 22. . The polarizing filters 25 a and 25 b are provided on the exit surface 23 side of each light guide path 21, and limit the characteristics of light emitted from the exit surface 23 to the characteristics of light incident on the incident surface 22 sharing the light guide path 21. It is an example of an "emission side restriction part".

  Specifically, the polarization filter 24a provided on the incident surface 22a side of the light guide path 21a and the polarization filter 25a provided on the output surface 23a side of the same light guide path 21a share the polarized light of the light passing therethrough with a common polarization. Limit to. Further, the polarizing filter 24b provided on the incident surface 22b side of the light guide path 21b and the polarizing filter 25b provided on the output surface 23b side of the same light guide path 21b limit the polarization of light to be transmitted to a common polarization. . At this time, the direction of polarized light (first direction) that the pair of polarizing filters 24a and 25a passes differs from the direction of polarized light (second direction) that the pair of polarizing filters 24b and 25b passes, for example, by about 90 degrees.

  According to the first embodiment, only the light polarized in a specific direction (the first direction) out of the light emitted from the light source 30a by the polarizing filter 24a is incident on the incident surface 22a and enters the incident surface 22a. The incident light is guided to the light guide path 21a and exits from the exit surface 23a (passes through the polarizing filter 25a). At this time, a part of the light incident on the incident surface 22a is guided to the light guide path 21b side through the coupling portion 26, but cannot pass through the polarizing filter 25b provided on the output surface 23b. Further, only light polarized in a specific direction (the second direction substantially orthogonal to the first direction) out of the light emitted from the light source 30b by the polarizing filter 24b is incident on the incident surface 22b and incident on the incident surface 22b. The emitted light is guided to the light guide path 21b and exits from the exit surface 23b (passes through the polarizing filter 25b). At this time, a part of the light incident on the incident surface 22b is guided to the light guide path 21a side through the connecting portion 26, but cannot pass through the polarizing filter 25a provided on the output surface 23a. Therefore, light emitted from the emission surface 23a (light of the light source 30a for illuminating the emission surface 23a) leaks from the emission surface 23b, and light emitted from the emission surface 23b (light source for illuminating the emission surface 23b). 30b) is reliably prevented from leaking from the exit surface 23a, and the quality of the light emitting device 10 is improved.

(Second embodiment)
FIG. 4 illustrates the light emitting device 10 according to the second embodiment in a perspective view. In the second embodiment, a configuration different from the first embodiment will be described.
In the second embodiment, the light emitting device 10 includes light sources 30 (30c, 30d) provided for each of the incident surfaces 22 (22a, 22b). These light sources 30c and 30d are examples of a plurality of light sources that emit light having different polarization states. In the second embodiment, the polarizing filters 24a and 24b on the incident surface 22 (22a and 22b) side as in the first embodiment may or may not be provided. In this sense, in the second embodiment, the light source 30 (30c, 30d) is also limited to the characteristic that the light incident on the incident surface 22 provided on the incident surface 22 side for each light guide 21 is different for each incident surface 22. It is included in the concept of the “incident side limiting portion”. FIG. 4 illustrates a case where the polarizing filters 24a and 24b are not provided.

  Specifically, the light source 30c provided on the incident surface 22a side of the light guide path 21a is polarized in the same direction as the polarization of the light transmitted by the polarizing filter 25a provided on the output surface 23a side of the same light guide path 21a. Only light is emitted to the incident surface 22a. In addition, the light source 30d provided on the incident surface 22b side of the light guide 21b only emits light polarized in the same direction as the polarization of the light passing through the polarizing filter 25b provided on the output surface 23b side of the same light guide 21b. Emits to the incident surface 22b.

  According to the second embodiment, only the light polarized in the first direction is incident on the incident surface 22a from the light source 30c, and the light incident on the incident surface 22a is guided to the light guide path 21a and is emitted. It exits from 23a (passes through the polarizing filter 25a). At this time, a part of the light incident on the incident surface 22a is guided to the light guide path 21b side through the coupling portion 26, but cannot pass through the polarizing filter 25b provided on the output surface 23b. Further, only light polarized in the second direction from the light source 30d is incident on the incident surface 22b, and the light incident on the incident surface 22b is guided to the light guide path 21b and is emitted from the output surface 23b (the polarization filter 25b). pass). At this time, a part of the light incident on the incident surface 22b is guided to the light guide path 21a side through the connecting portion 26, but cannot pass through the polarizing filter 25a provided on the output surface 23a. Accordingly, light emitted from the emission surface 23a (light of the light source 30c for illuminating the emission surface 23a) leaks from the emission surface 23b, and light emitted from the emission surface 23b (light source for illuminating the emission surface 23b). 30d) is reliably prevented from leaking from the exit surface 23a. Further, when compared with the first embodiment, according to the second embodiment, the cost can be reduced by omitting the polarizing filters 24a, 24b on the incident surface 22 (22a, 22b) side.

(Third embodiment)
FIG. 5 illustrates the light emitting device 10 according to the third embodiment in a perspective view. In the third embodiment, a configuration different from the first and second embodiments will be described. In the third embodiment, the shape of the light guide member 20 is different from those in the first and second embodiments. Specifically, the light guide member 20 has a plurality of light guide paths 21 (21a) each having an emission surface 23 (23a, 23b) for emitting light while sharing the incident surface 22 on which light emitted from the light source 30 is incident. , 21b) are integrally formed. In the third embodiment (and the sixth embodiment, which will be described later), the cost of manufacturing the plurality of light guide paths 21 is suppressed by integrally molding the plurality of light guide paths 21 with a material such as a transparent resin.

  In the third embodiment, unlike the first and second embodiments, the number of the light sources 30 is one because the incident surface 22 is one. Further, between the incident surface 22 and the light source 30, an incident light variable unit 31 capable of changing the characteristics of light incident on the incident surface 22 among the light emitted from the light source 30 is provided. Specifically, the incident light variable unit 31 changes the polarization of the light incident on the incident surface 22, and changes the direction of the polarization to one of the first direction and the second direction, for example. To do. The incident light variable unit 31 is, for example, a liquid crystal device whose polarization characteristics are variable according to an applied voltage.

  The polarizing filters 25a and 25b provided for each of the exit surfaces 23a and 23b are any of the properties that the incident light variable unit 31 can change the characteristics of the light emitted from the corresponding exit surfaces 23a and 23b. It is an “outgoing side restricting portion” that restricts the characteristics to be different for each of 23a and 23b. Specifically, the polarization filter 25a corresponding to the emission surface 23a passes only light polarized in the first direction, and the polarization filter 25b corresponding to the emission surface 23b passes only light polarized in the second direction. .

  According to the third embodiment, when the direction of polarized light transmitted by the incident light variable unit 31 is limited to the first direction, only the light polarized in the first direction among the light emitted from the light source 30 is included. Light incident on the incident surface 22 and incident on the incident surface 22 is guided to the light guide path 21a and the light guide path 21b, and exits from the exit surface 23a (passes through the polarization filter 25a). At this time, the light guided to the light guide path 21b side cannot pass through the polarizing filter 25b provided on the emission surface 23b. Further, when the direction of polarized light passing through the incident light variable unit 31 is limited to the second direction, only the light polarized in the second direction out of the light emitted from the light source 30 is incident on the incident surface 22 and the incident surface. The light incident on 22 is guided to the light guide path 21a and the light guide path 21b, and exits from the exit surface 23b (passes through the polarization filter 25b). At this time, the light guided to the light guide path 21a cannot pass through the polarizing filter 25a provided on the emission surface 23a. Therefore, both light leakage from the emission surface 23b when the emission surface 23a emits light and light leakage from the emission surface 23a when the emission surface 23b emits light are reliably prevented. . Further, when compared with the first and second embodiments, according to the third embodiment, since the number of the incident surfaces 22 is one, the number of the light sources 30 can be reduced and the cost can be reduced. The light source 30 itself may have the function of the incident light variable unit 31 and may change the polarization of the emitted light.

(Fourth embodiment)
In the fourth embodiment, the term “polarized light” in the first embodiment is conceptually replaced with the term “wavelength”.
FIG. 6 illustrates the light emitting device 10 according to the fourth embodiment in a perspective view. In the fourth embodiment, a configuration different from that of the first embodiment will be described.

  As shown in FIG. 6, when paying attention to the light guide path 21a, a wavelength filter 27a is provided on the entrance surface 22a, and a wavelength filter 28a is provided on the exit surface 23a. When attention is paid to the light guide path 21b, a wavelength filter 27b is provided on the incident surface 22b, and a wavelength filter 28b is provided on the output surface 23b. All such wavelength filters (bandpass filters) are vapor-deposited or mounted on the target surface, and allow only light of a specific wavelength to pass therethrough.

  The wavelength filters 27 a and 27 b are an example of an “incident side limiting unit” that is provided on the incident surface 22 side for each light guide 21 and restricts the characteristics of light incident on the incident surface 22 to different characteristics for each incident surface 22. . The wavelength filters 28 a and 28 b are provided on the emission surface 23 side of each light guide path 21, and limit the characteristics of light emitted from the emission surface 23 to the characteristics of light incident on the incident surface 22 sharing the light guide path 21. It is an example of an "emission side restriction part".

  Specifically, the wavelength filter 27a provided on the incident surface 22a side of the light guide path 21a and the wavelength filter 28a provided on the output surface 23a side of the same light guide path 21a share the wavelength of light to be transmitted with a common wavelength. Limit to. Further, the wavelength filter 27b provided on the incident surface 22b side of the light guide 21b and the wavelength filter 28b provided on the output surface 23b side of the same light guide 21b limit the wavelength of light to be transmitted to a common wavelength. . At this time, the wavelength (first wavelength) that the pair of wavelength filters 27a and 28a passes is different from the wavelength (second wavelength) that the pair of wavelength filters 27b and 28b passes. For example, the first wavelength is a certain range of wavelengths near 700 nm (wavelength approximately corresponding to red), and the second wavelength is a certain range of wavelengths near 550 nm (wavelength approximately corresponding to green).

  According to the fourth embodiment, only the light having a specific wavelength (the first wavelength) out of the light emitted from the light source 30a is incident on the incident surface 22a and is incident on the incident surface 22a by the wavelength filter 27a. The light is guided to the light guide path 21a and exits from the exit surface 23a (passes through the wavelength filter 28a). At this time, a part of the light incident on the incident surface 22a is guided to the light guide path 21b side through the connecting portion 26, but cannot pass through the wavelength filter 28b provided on the output surface 23b. Further, only light having a specific wavelength (second wavelength) out of the light emitted from the light source 30b is incident on the incident surface 22b by the wavelength filter 27b, and the light incident on the incident surface 22b is guided to the light guide path 21b. And exits from the exit surface 23b (passes through the wavelength filter 28b). At this time, a part of the light incident on the incident surface 22b is guided to the light guide path 21a side through the connecting portion 26, but cannot pass through the wavelength filter 28a provided on the output surface 23a. Accordingly, it is possible to reliably prevent the color of light emitted from the emission surface 23a from leaking from the emission surface 23b and the color of light emitted from the emission surface 23b from leaking from the emission surface 23a. 10 quality is improved.

(5th Example)
The fifth embodiment is different from the fourth embodiment in the same manner as the second embodiment is different from the first embodiment. In the fifth embodiment, the term “polarized light” in the second embodiment is conceptually replaced with the term “wavelength”.
FIG. 7 illustrates the light emitting device 10 according to the fifth embodiment in a perspective view. In the fifth embodiment, a configuration different from that of the fourth embodiment will be described.
In the fifth embodiment, the light emitting device 10 includes light sources 30 (30e, 30f) provided for each of the incident surfaces 22 (22a, 22b). These light sources 30e and 30f are examples of a plurality of light sources that emit light having different wavelengths. In the fifth embodiment, the wavelength filters 27a and 27b on the incident surface 22 (22a and 22b) side as in the fourth embodiment may or may not be provided. In this sense, in the fifth embodiment, the light source 30 (30e, 30f) is also limited to the characteristic that the light incident on the incident surface 22 provided on the incident surface 22 side for each light guide 21 is different for each incident surface 22. It is included in the concept of the “incident side limiting portion”. FIG. 7 illustrates a case where the wavelength filters 27a and 27b are not provided.

  Specifically, the light source 30e provided on the incident surface 22a side of the light guide path 21a is only light having a wavelength that is the same as the wavelength of light transmitted by the wavelength filter 28a provided on the output surface 23a side of the same light guide path 21a. To the incident surface 22a. The light source 30f provided on the incident surface 22b side of the light guide path 21b receives only light having the same wavelength as the wavelength of the light that the wavelength filter 28b provided on the output surface 23b side of the same light guide path 21b passes. Depart to 22b.

  According to the fifth embodiment, only the light having the first wavelength is incident on the incident surface 22a from the light source 30e, and the light incident on the incident surface 22a is guided to the light guide path 21a from the output surface 23a. Outgoes (passes through the wavelength filter 28a). At this time, a part of the light incident on the incident surface 22a is guided to the light guide path 21b side through the connecting portion 26, but cannot pass through the wavelength filter 28b provided on the output surface 23b. Further, only the light of the second wavelength is incident on the incident surface 22b from the light source 30f, and the light incident on the incident surface 22b is guided to the light guide path 21b and is emitted from the emission surface 23b (passes through the wavelength filter 28b). ). At this time, a part of the light incident on the incident surface 22b is guided to the light guide path 21a side through the connecting portion 26, but cannot pass through the wavelength filter 28a provided on the output surface 23a. Therefore, the color of the light emitted from the emission surface 23a (the emission color of the light source 30e) leaks from the emission surface 23b, and the color of the light emitted from the emission surface 23b (the emission color of the light source 30f) is the emission surface 23a. Any leakage from the device is reliably prevented. Further, when compared with the fourth embodiment, according to the fifth embodiment, the cost can be reduced by omitting the wavelength filters 27a, 27b on the incident surface 22 (22a, 22b) side.

(Sixth embodiment)
The sixth embodiment is different from the first and second embodiments in that the third embodiment has differences from the fourth and fifth embodiments. In the sixth embodiment, the term “polarized light” in the third embodiment is conceptually replaced with the term “wavelength”.
FIG. 8 illustrates the light emitting device 10 according to the sixth embodiment in a perspective view. In the sixth embodiment, a configuration different from the fourth and fifth embodiments will be described. In the sixth embodiment, the shape of the light guide member 20 is the same as that of the third embodiment (FIG. 5). The number of the light sources 30 is one as in the third embodiment because there is one incident surface 22.

  In addition, an incident light variable unit 32 that can change the characteristics of light incident on the incident surface 22 among the light emitted from the light source 30 is provided between the incident surface 22 and the light source 30. Specifically, the incident light variable unit 32 is a wavelength tunable optical filter that changes the wavelength of light incident on the incident surface 22 within the visible light band. For example, the incident light variable section 32 can change the wavelength to be passed to either the first wavelength or the second wavelength according to the applied voltage.

  The wavelength filters 28a and 28b provided for each of the emission surfaces 23a and 23b are any of the properties that the incident light variable unit 32 can change the characteristics of the light emitted from the corresponding emission surfaces 23a and 23b. It is an “outgoing side restricting portion” that restricts the characteristics to be different for each of 23a and 23b. Specifically, the wavelength filter 28a corresponding to the emission surface 23a passes only the light of the first wavelength, and the wavelength filter 28b corresponding to the emission surface 23b passes only the light of the second wavelength.

  According to the sixth embodiment, when the wavelength that the incident light variable unit 32 passes is limited to the first wavelength, only the light having the first wavelength out of the light emitted from the light source 30 is incident on the incident surface 22. The light that is incident and incident on the incident surface 22 is guided to the light guide path 21a and the light guide path 21b, and exits from the exit surface 23a (passes through the wavelength filter 28a). At this time, the light guided to the light guide path 21b side cannot pass through the wavelength filter 28b provided on the emission surface 23b. Further, when the wavelength that the incident light variable section 32 passes is limited to the second wavelength, only the light of the second wavelength out of the light emitted from the light source 30 is incident on the incident surface 22 and is incident on the incident surface 22. The light is guided to the light guide path 21a and the light guide path 21b, and exits from the exit surface 23b (passes through the wavelength filter 28b). At this time, the light guided to the light guide path 21a cannot pass through the wavelength filter 28a provided on the emission surface 23a. Accordingly, when the emission surface 23a emits light, the light color of the emission surface 23a leaks from the emission surface 23b, and when the emission surface 23b emits light, the color of the light of the emission surface 23b changes to the emission surface 23a. Any leakage from the device is reliably prevented. Further, when compared with the fourth and fifth embodiments, according to the sixth embodiment, since the number of the incident surfaces 22 is one, the number of the light sources 30 can be reduced and the cost can be reduced. The light source 30 itself may have the function of the incident light variable unit 32 and may change the wavelength of the emitted light.

(Other)
Turning on / off the light source 30 and changing the polarization and wavelength of light transmitted by the incident light variable sections 31 and 32 are controlled by a control circuit such as an IC (not shown) provided in the electronic device 100.

  Further, the number of indicators visually recognized by the user, that is, the number of emission surfaces 23 included in the light guide member 20 may be three or more. In this case, the light guide member 20 is formed by integrally forming three or more light guide paths 21 each having an exit surface 23. In the first, second, fourth, and fifth embodiments, the light guide member 20 is guided. Each optical path 21 has an incident surface 22, and in the third and sixth embodiments, each light guide path 21 shares one incident surface 22. In the first, second, and third embodiments, the polarization corresponding to each of the plurality of exit surfaces 23 is obtained by equally dividing, for example, 180 degrees by the number of exit surfaces 23 (the number of light guide paths 21). In the fourth, fifth, and sixth embodiments, the wavelengths that correspond to each of the plurality of emission surfaces 23 are different wavelengths.

further,
-Applying the combinations of the mutually replaceable members and configurations disclosed in the above embodiments as appropriate,
-Although not disclosed in each of the above embodiments, it is a known technique, and members and structures that are mutually replaceable with members and structures disclosed in each of the above embodiments are appropriately replaced and combinations thereof Change and apply,
-Although not disclosed in each of the above embodiments, the members and structures, etc., which can be assumed as a substitute for the members, structures, etc. disclosed in each of the above embodiments by those skilled in the art based on publicly known techniques, etc. are appropriately replaced. , And changing and applying that combination,
Is disclosed as an embodiment of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Light-emitting device, 20 ... Light guide member, 21, 21a, 21b ... Light guide path, 22, 22a, 22b ... Incident surface, 23, 23a, 23b ... Output surface, 24a, 24b, 25a, 25b ... Polarizing filter, 26 ... Connector, 27a, 27b, 28a, 28b ... Wavelength filter, 30, 30a, 30b, 30c, 30d, 30e, 30f ... Light source, 31, 32 ... Incident light variable part, 100 ... Electronic equipment

Claims (10)

A light source;
A light guide member integrally formed with a plurality of light guide paths each having an incident surface on which light emitted from the light source is incident and an output surface that emits light incident on the incident surface;
An incident-side limiting unit that is provided on the incident surface side for each light guide and restricts the characteristics of light incident on the incident surface to different characteristics for each incident surface;
An exit-side limiting unit that is provided on the exit surface side of each light guide path and restricts the characteristics of light emitted from the exit surface to the characteristics of light incident on the entrance surface sharing the light guide path;
A light emitting device comprising:   The light emitting device according to claim 1, wherein the light characteristic is polarized light.   The incident side restricting portion provided on one incident surface side and the exit side restricting portion provided on the exit surface side sharing the light guide path with the incident surface share the polarization of light to be transmitted. The light-emitting device according to claim 2, wherein the light-emitting device is a polarizing filter that limits the polarization of the light-emitting device.   4. The incident side restricting portion for each incident surface includes at least a plurality of light sources that emit light having different polarization states from each other, the light sources being provided for each incident surface. The light emitting device according to 1.   The light emitting device according to claim 1, wherein the light characteristic is a wavelength.   The incident side restricting portion provided on one incident surface side and the exit side restricting portion provided on the exit surface side sharing the light guide path with the incident surface share a common wavelength of light to be transmitted. The light-emitting device according to claim 5, wherein the light-emitting device is a wavelength filter that limits the wavelength of the light-emitting device.   7. The incident side restricting unit for each incident surface includes at least a plurality of light sources that emit light having different wavelengths from each other, the light sources being provided for each incident surface. The light-emitting device of description. A light source;
A light guide member integrally formed with a plurality of light guide paths each having an emission surface for emitting light while sharing an incident surface on which light emitted from the light source is incident;
An incident light variable portion provided on the incident surface side of the light guide and capable of changing characteristics of light incident on the incident surface;
An exit that is provided on the exit surface side of each light guide path and that restricts the characteristics of the light emitted from the exit surface to any one of the characteristics that can be changed by the incident light variable section and is different for each exit surface. A side restriction,
A light emitting device comprising:   The light emitting device according to claim 8, wherein the light characteristic is polarized light.   The light emitting device according to claim 8, wherein the light characteristic is a wavelength.

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