JP5069719B2 - Light emitting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To aim at uniformalization of brightness of irradiation light with illuminance maintained, by avoiding an embossing treatment on an irradiating part and restraining unevenness of light as much as possible, even in a light-emitting device having point light sources such as LEDs arrayed in a straight line at an end part of a light guide member. <P>SOLUTION: The light-emitting device includes a light source 1 made by arraying a plurality of LEDs 11 in a straight line set along an end face of one end part of the platy light guide member 2. The device includes an irradiation part 3 provided at the other end part opposite to the one end part of the light guide member 2 equipped with the light source 1 for irradiating light from the light source 1. The irradiating part 3 includes a prism part 38 or a Fresnel lens part structured of a plurality of prisms 36 of a cross-section nearly triangular shape, with a tooth angle d at a reflection/refraction face 37 of each prism 36 formed larger toward outside. Further, an edge line 39 of the prism part 38 or the Fresnel lens part is set so as to be nearly at right angles with a direction b along the end face of the other end part. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a light emitting device.

  Conventionally, as a light emitting device in which a light source is disposed along an edge of a light guide member, light from this light source is incident on the light guide member, and an object to be illuminated is illuminated by light emitted from the exit surface, for example, The thing of patent document 1 is known.

  The light-emitting device disclosed in Patent Document 1 is a light source in which a plurality of LEDs (Light Emitting Diodes) are arranged in a straight line on one side in the depth direction of a light guide member that is triangular in cross section and long in the depth direction. And is made to emit from a light emitting surface which is the other side surface, and this light emitting surface is constituted by a smooth flat surface or a surface subjected to mere embossing.

Japanese Patent Laid-Open No. 2008-234876

  By the way, in the above light emitting device, as described above, since the light source is composed of a small and directional LED, it is emitted from the LED unless the distance between the entrance surface and the exit surface is sufficiently long. The emitted light is emitted without spreading. As a result, as shown in FIG. 8A, a region S that cannot be irradiated to the irradiated object is generated, and so-called light unevenness may occur. In FIG. 8A, reference numeral 2 'indicates a light guide member, and 11' indicates an LED.

  Therefore, the inventor makes the light guide member into a plate shape, thereby increasing the distance between the incident portion where the light from the light source is incident and the emission portion where the light guided through the light guide member is emitted, We have developed a light-emitting device that emits light from a light source consisting of LEDs and then emits it from the light-emitting part to minimize light unevenness.

  However, even in such a light-emitting device, when the emission surface of the emission part 3a is a smooth flat surface, the light emitted from the emission part 3a is, as shown in FIG. Since it spreads toward the direction, the luminance around the emitted light is lowered, and there are cases where the luminance is still uneven between the periphery and the center of the light. In addition, the code | symbol 2a in FIG.8 (b) has shown the light guide member and 11a has shown LED.

  On the other hand, when the exit surface of the exit portion is a surface that has been subjected to simple texture processing, the light emitted from the exit portion is diffused and the overall brightness becomes uniform, but the illuminance decreases. It was a thing.

  The present invention has been made in view of the above-described conventional problems. The object of the present invention is to provide an output portion even in a case where point light sources such as LEDs are arranged in a straight line at the end portion of a light guide member. An object of the present invention is to provide a light-emitting device that can suppress the uneven processing and suppress the unevenness of light as much as possible, and can make the luminance of the emitted light uniform while maintaining the entire light amount (illuminance).

  In order to solve the above problems, the present invention has the following configuration.

  That is, in the invention according to claim 1, the light source 1 in which a plurality of LEDs 11 are arranged in a straight line is provided so as to be along the end surface of one end of the plate-shaped light guide member 2. An emission part 3 for emitting light from the light source 1 is provided at the other end of the light guide member 2 opposite to the one end where the light source 1 is provided. The light emitting section 3 includes a prism section 38 or a Fresnel lens section composed of a plurality of prisms 36 in which the tooth angle d of the reflection / refractive surface 37 of the prism 36 having a substantially triangular cross section is made larger toward the outer prism 36. Is. And the ridgeline 39 of this prism part 38 or the Fresnel lens part was provided so that it might become substantially right-angled in the direction b along the end surface of the other end part.

  With this configuration, even when the small and directional LED 11 is used as the light source 1, the light guide member 2 has a plate shape, so that the light emitted from the LED 11 is sufficiently expanded. The light can be emitted from the light guide member 2 above. In addition, by providing a prism portion 38 or a Fresnel lens portion composed of a plurality of prisms 36 in which the tooth angle d of the reflection / refractive surface 37 of the prism 36 having a substantially triangular cross section is made larger as the outer prism 36 is provided. The light emitted from the portion 38 or the Fresnel lens portion can be emitted without spreading sideways. As a result, it is possible to emit light with a more uniform luminance as a whole by suppressing light unevenness as much as possible while maintaining illuminance.

  In the invention according to claim 2, in the invention according to claim 1, it is defined that a pair of planes of the plate-like light guide member 2 are directed vertically. And the 1st light guide surface 5 which consists of a curved surface or an inclined surface located below as the front-end | tip is provided in the upper surface of the other end part in which the output part 3 of the said light guide member 2 exists. The light emitting unit 3 includes a first light emitting surface 31 that includes the first light guide surface 5 and emits a part of light from the light source 1, and a light source 1 that is reflected by the first light guide surface 5. And a second emission surface 32 from which light is emitted. Then, the prism portion 38 or the Fresnel lens portion was formed on the first emission surface 31.

  With this configuration, not only the light emitted from the first emission surface 31 can be emitted without spreading sideways, but also reflected by the prism portion 38 or the Fresnel lens portion in the light guide member 2. The reflected light can be reflected without spreading sideways. That is, it is possible to emit the light emitted in the two directions of the first emission surface 31 and the second emission surface 32 with a more uniform luminance as a whole by suppressing light unevenness as much as possible.

  According to the present invention, even if a point light source such as an LED is arranged in a straight line at the end portion of the light guide member, the object to be irradiated is irradiated with light of uniform brightness as a whole while suppressing light unevenness as much as possible. Can be illuminated effectively. Moreover, since the light emitting part is not subjected to the graining process, the illuminance can be prevented from being lowered, and the light guide member is formed in a plate shape. It is something that can be done.

It is the schematic of 1st embodiment of this invention, (a) is a top view, (b) is an enlarged view of the area | region U in (a). It is a sectional side view same as the above. It is principal part side sectional drawing same as the above. It is a side view of the vanity which incorporated the light-emitting device same as the above. It is a schematic sectional side view of the principal part of 3rd embodiment. It is a perspective view of a light guide member same as the above. It is a schematic sectional side view of the principal part of 4th embodiment. (A) and (b) are the schematic plan views explaining a prior art example.

  The present invention will be described below with reference to the accompanying drawings.

  As shown in FIG. 4, the first embodiment is a bathroom vanity 7 on which the light emitting device A of the present invention is mounted. In the vanity table 7 of the present embodiment, a mirror cabinet 74 having a mirror 73 disposed on the front surface is disposed above a vanity body 71 having a vanity bowl 72, and the light emitting device A is disposed above the mirror cabinet 74. Is attached.

  The light emitting device A includes a thin light guide member 2 and a light source 1 including a light emitting diode (hereinafter referred to as LED) 11 attached to one end of the light guide member 2. The light emitting device A is attached with a pair of flat surfaces of the thin plate-shaped light guide member 2 facing up and down. For convenience of explanation, the light emitting device A of the present embodiment will be described with the light guide member 2 in which the end side with the incident portion 4 is the rear and the end side with the emission portion 3 is the front.

  As shown in FIG. 2, the light guide member 2 is configured by a thin plate-like transparent member having a substantially rectangular shape in plan view. The light guide member 2 has end faces so as to surround the outer periphery of the plate surface provided at the top and bottom. Of the pair of end portions in the four end portions of the light guide member 2, one of the end surfaces (hereinafter referred to as one end portion) is the incident portion 4 on which light from the light source 1 enters, The other end portion (hereinafter referred to as the other end portion) is the emission portion 3. In addition, the light guide member 2 has an upper surface slightly inclined with respect to the lower surface of the light guide member 2, and this inclination is from the incident portion 4 (that is, one end portion) to the output portion 3 (that is, one end portion). , The other end portion) is inclined such that the distance between the lower surface and the upper surface increases. That is, the thickness is gradually increased from the incident portion 4 to the emission portion 3.

  As shown in FIG. 2, the emission unit 3 of the present embodiment is provided on the upper surface of the light guide member 2, and includes a first emission surface 31 configured with a curved surface that is smoothly continuous from the upper surface, and the other of the light guide member 2. It is comprised from the 2nd output surface 32 located in the lower surface of an edge part side.

  In the present embodiment, the other end portion where the emitting portion 3 is formed is a first light guide surface 5 formed with a curved surface located downward as the tip end, and is repeatedly reflected in the light guide member 2. A part of the light is totally reflected toward the second emission surface 32 in the first light guide surface 5.

  Further, in the present embodiment, the first light guide surface 5 is the first light exit surface 31. That is, the light that does not satisfy the total reflection condition among the light incident on the first light guide surface 5 is emitted while being refracted without being totally reflected by the first light guide surface 5, while, as described above, Incident light that satisfies the total reflection condition on one light guide surface 5 is totally reflected on the first light guide surface 5, and most of the totally reflected light is emitted from the second light exit surface 32. That is, the light emitting device A according to the present embodiment emits light in two different directions from a total of two locations, the first emission surface 31 and the second emission surface 32, and the light emitted from the first emission surface 31 is the wash surface. The light is emitted to the periphery of the face of the user of the dressing table 7, and the light emitted from the second exit surface 32 is light that illuminates the front surface portion (mirror 73) of the mirror cabinet 74 of the vanity table 7.

  As shown in FIG. 1B, the first emission surface 31 includes a plurality of fine prisms 36 having a substantially triangular cross section. The plurality of prisms 36 are juxtaposed along the end face of the other end portion of the light guide member 2, and the ridge line 39 formed at the projecting tip of each prism 36 is in the direction b along the end face of the other end portion. It is provided so as to be substantially perpendicular to. The prism also includes a reflection / refractive surface 37 that emits or reflects light guided in the light guide member 2 (the prism 36 of the present embodiment has a tip that forms the end surface of the emitting portion 3). 2 in the direction b along the end surface of the other end of the plate-shaped light guide member 2, the tooth angle d of the reflection / refractive surface 37 becomes closer to both ends. It is configured to be large.

  The tooth angle d here refers to the end surface on which the prism 36 is not projected at the other end of the light guide member 2 as a virtual plane e, and between the virtual plane and the reflection / refractive surface 37. It shall be the angle formed.

  As described above, when the first emission surface 31 is configured by the prism portion 38 whose tooth angle d is larger toward the outward prism 36 in the direction b along the end surface of the other end portion of the light guide member 2, The outgoing light that is refracted and transmitted through the reflection / refractive surface 37 can travel in a direction substantially forward by this refraction (see the arrow in FIG. 1B). As a result, when viewed as the entire light emitted from the first emission surface 31, it is possible to prevent the emitted light from spreading to the side, and to avoid a decrease in luminance around the emitted light. be able to. That is, the luminance approaches uniformly in the direction b along the end surface of the other end of the light guide member 2 (in this case, the direction b along the end surface of the other end of the light guide member 2 is the luminance uniforming direction f. Become).

  On the other hand, when light reflected by the first light guide surface 5 (first light exit surface 31) and directed toward the second light exit surface 32 is reflected by the reflection / refractive surface 37, the direction along the end surface of the other end of the light guide member 2 Since the outer side prism 36 of b has a larger tooth angle d, when viewed as the whole light reflected on the first light guide surface 5, it is reflected without spreading sideways. As a result, even in the light emitted from the second emission surface 32, it is possible to avoid the peripheral luminance from being lowered, and the luminance can be made uniform.

  Moreover, the light source 1 is comprised by LED11 which is a point light source as already stated. The LEDs 11 are attached so as to be aligned along one end of the light guide member 2. Thus, by using a point light source such as the LED 11 for the light source 1, the light guide member 2 can be further thinned. More specifically, since the LED 11 is used as the light source 1, light can be emitted with low power consumption, so that the running cost can be reduced. In addition, although LED11 of this embodiment uses chip type chip LED11, it is not specifically limited. Further, the color of light of the LED 11 is not particularly limited.

  The light guide member 2 and the light source 1 configured as described above are housed in a housing 6 as shown in FIG.

  The housing 6 is divided into a light guide member housing 61 that houses the light guide member 2 and a light source housing 62 in which the light source 1 is housed, and the light source housing 62 is associated with the light guide member housing 61. It is attached detachably. A thin air layer k is formed between the light guide member housing 61 and the light guide member 2 as shown in FIGS. 2 and 3. Light from the light source 1 is transmitted from the incident portion 4. The reflected light is prevented from being attenuated in the process of guiding light toward the emitting portion 3. That is, as a result of contact of a member different from the light guide member 2 on the upper and lower reflection surfaces of the light guide member 2, the total reflection condition is prevented from being broken depending on the refractive index of the member.

  A light-transmitting illumination cover 63 is attached to the end of the light guide member housing 61 opposite to the end where the light source housing 62 is attached. The illumination cover 63 is detachably attached to the light guide member housing 61. The illumination cover 63 changes the traveling direction of the light transmitted through the illumination cover 63 and further condenses the transmitted light to increase the luminance. It has an enhancing effect. A first transmission portion 64 is provided on the front surface portion of the illumination cover 63, and the light emitted from the first emission surface 31 of the light guide member 2 is transmitted through the first transmission portion 64 and refracted. The light emission direction can be changed. That is, the light traveling direction can be set by the illumination cover 63.

  Furthermore, the lower surface of the illumination cover 63 is provided with a second transmission portion 65 that transmits and refracts the light emitted from the second emission surface 32 of the light guide member 2, so that the light on the second emission surface 32 travels. It is possible to set the direction.

  According to the light emitting device A having such a configuration, even when the small and directional LED 11 is used as the light source 1, the light guide member 2 has a plate-like shape. The distance between the LED 4 and the emission part 3 can be made sufficiently large. As a result, the light emitted from the LED 11 can be emitted from the emission part 3 after being sufficiently expanded in the light guide member 2. That is, the irradiated object can be illuminated with light with little light unevenness. In addition, the code | symbol S in Fig.1 (a) has shown the area | region where the light from a light source does not pass.

  Further, as described above, the ridge line 39 formed by the protruding tip of the prism portion 38 is provided so as to be perpendicular to the luminance uniforming direction f, and the direction along the end surface of the other end portion of the light guide member 2 Since the tooth angle d of the reflection / refractive surface 37 increases as it approaches both ends of b, the light emitted from the first emission surface 31 is converged without spreading in the luminance uniforming direction f. Can be emitted. As a result, the directivity of the light emitted from the light guide member 2 is increased, so that the irradiated object can be effectively illuminated.

  In addition, the light emitted from the second emission surface 32 can be emitted without being spread in the luminance uniforming direction f, so that the light emitted from the second emission surface 32 can be emitted. Therefore, the irradiated object can be illuminated.

  In addition, since the light emitted from the emitting unit 3 is prevented from spreading in this way, it is possible to irradiate the irradiated object at a position away from the light emitting device A.

  Furthermore, since the light guide member 2 of the present embodiment is configured such that the plate thickness increases as the distance from the incident portion 4 to the emission portion 3 increases, the light from the incident light source 1 is repeatedly reflected in the light guide member 2. When going to the emission part 3, the incident angle (reference symbol i in FIG. 2) with respect to the reflecting surface can be increased as the reflection is repeated. As a result, the upper and lower reflecting surfaces in the light guide member 2 are incident on the upper and lower reflecting surfaces in the light guide member 2 under an incident condition that is less than the critical angle as much as possible. It is possible to prevent the total reflection condition of incident light from being broken. That is, it is possible to reduce the attenuation of light generated in the light guiding process.

  In addition, since the incident angle i on the reflection surface of the light guide member 2 increases as the reflection is repeated in this manner, the mirror finish is insufficient on the upper and lower reflection surfaces of the light guide member 2. Even in this case, the amount of light emitted from the emitting portion can be not significantly reduced.

  Moreover, when the traveling direction of the light in the light guide member 2 is considered as a unit vector, the component in the direction toward the emitting portion 3 (the direction of the arrow n in FIG. 2; the incident surface normal direction) repeats reflection. The component in the direction perpendicular to the direction toward the emitting portion 3 (the direction of the arrow m in FIG. 2) gradually decreases as the reflection is repeated. That is, the light travels in the light guide member 2 converges in a substantially constant direction (incident surface normal direction n), so that optical operation is performed at the emitting unit 3 (for example, illumination in the present embodiment). An optical operation can be performed by the cover 63, or an optical operation can be performed by changing the curvature and the curved shape of the first emission surface 31).

  In addition, the illumination cover 63 attached to the light emitting device A of the present embodiment can set the irradiation direction of the converged light emitted from the emission part 3 of the light guide member 2 as described above. . That is, since the illumination cover 63 is detachably provided with the light guide member 2, the same type of light guide member 2 can be used to form the vanity 7 with many shapes by simply providing a plurality of types of illumination covers 63. This makes it possible to cope with inventory management.

  The light emitting device A configured as described above is attached to the vanity 7 as shown in FIG.

  As described in the introduction, the vanity table 7 of the present embodiment includes a mirror cabinet 74 having a mirror 73 disposed on the front surface at a position above the vanity main body 71 having the vanity bowl 72, and this mirror cabinet. A light emitting device A is attached to an upper portion of 74.

  The mirror cabinet 74 has a rectangular box-shaped cabinet body 76 that opens forward and is partitioned by a shelf plate (not shown) or a vertical partition plate (not shown) to form a storage portion (not shown). . A door body 77 is pivotally supported at the front portion of the cabinet body 76 so as to be openable and closable. A mirror 73 (end plate) is disposed on the front surface of the door body 77 over the substantially front surface.

  The light emitting device A is embedded in the upper part of the mirror cabinet 74 as shown in FIG. Specifically, a storage recess 75 for the light emitting device A is formed above the door body 77 installed in the mirror cabinet 74, and most of the light emitting device A is embedded in the storage recess 75. ing. The other end portion of the light emitting device A where the emitting portion 3 is located is installed so as to protrude forward from the mirror 73 of the mirror cabinet 74. That is, only the illumination cover 63 including the emitting part 3 is protruded from the vanity 7 and the other part is installed in the mirror cabinet 74 so as not to be seen.

  As described above, in the light emitting device A of the present embodiment, the portion protruding from the mirror cabinet 74 is a small portion of only the illumination cover 63 including the emitting portion 3 inside, so that the appearance can be improved. It has become. In addition, while the portion protruding from the mirror cabinet 74 is a small portion of only the illumination cover 63, the second emission surface 32 (the first emission surface 31 (the first transmission portion 64) is illuminated with light emitted from the first emission surface 31 (the first transmission portion 64). The light emitted from the second transmitting portion 65) can illuminate the mirror 73 under the light emitting device A.

  Further, since the light guide member 2 has a plate shape, the length between the side walls facing the upper and lower sides of the storage recess 75 provided in the upper part of the mirror cabinet 74 can be made as short as possible. That is, the light emitting device A of the present invention has an advantage that it can be installed even in a place where there is no space in the vertical direction.

  Next, a second embodiment will be described. In addition, since this embodiment is mostly the same as 1st embodiment, it does not illustrate in particular.

  Unlike the said embodiment, the 1st output surface 31 of the output part of the light guide member of this embodiment is comprised by the Fresnel lens part.

  In this Fresnel lens portion, the ridge line 39 drawn at the top of the finely processed protrusion is substantially perpendicular to the direction b (that is, the luminance uniforming direction f) along the end surface of the other end of the light guide member. It is formed by a so-called linear Fresnel lens surface that is formed and arranged in a large number so that each ridge line 39 is parallel to each other.

  Even if comprised in this way, the effect similar to said 1st embodiment can be acquired.

  Next, a third embodiment will be described with reference to FIGS. Since the present embodiment is mostly the same as the first embodiment, the same portions are denoted by the same reference numerals, description thereof is omitted, and different portions are mainly described.

  As shown in FIGS. 5 and 6, the light emitting device A of the present embodiment has the same shape as the first light emitting surface (first light guiding surface) of the light guide member 2, but the second light emitting device A has the second light emitting surface. The shape of the surface 3 is different from that of the first embodiment. That is, a protrusion 34 that protrudes downward from the lower surface of the other end of the light guide member 2 is provided, and the lower end of the protrusion 34 is positioned higher toward the tip of the other end. A convex curved surface is formed, and this convex curved surface is used as the second emission surface 32.

  Further, the rear surface of the ridge portion is used as a contact surface 35, and the contact surface 35 is brought into contact with the front portion of the light guide member housing 61 so as to be positioned.

  The first emission surface 31 of the present embodiment is formed in a wider range than the first emission surface 31 of the first embodiment. That is, the first emission surface 31 is formed at substantially the same position as the lower surface of the light guide member 2 or below it, and the top portion is the boundary between the first emission surface 31 and the second emission surface 32. 33 is located at substantially the same position as the lower surface of the light guide member 2 or below the lower surface of the light guide member 2.

  And the light-emitting device A of this embodiment comprised in this way is mounted | worn with the upper part of the vanity stand 7 similarly to 1st embodiment, and is only the illumination cover 63 which accommodates the output part 3 inside. A slight range protrudes from the mirror cabinet 74 of the vanity 7 and is embedded.

  According to such a configuration, by providing the protrusion 34 on the lower surface of the other end of the light guide member 2, compared to the first or second embodiment without the protrusion 34, The range (reference symbol c in FIG. 5) of the first emission surface 31 configured by a smoothly continuous curved surface from the upper surface of the light guide member 2 can be further increased. As a result, the light collecting action can be performed more effectively, and more light can be totally reflected on the second exit surface 32. In addition, since the second light exit surface 32 is formed with a convex curved surface, when the light totally reflected by the first light guide surface 5 is emitted from the second light output surface 32, the light is condensed by the convex curved surface, and then the mirror cabinet 74. The light can be refracted in the direction approaching the mirror 73.

  Next, a fourth embodiment will be described with reference to FIG. Since this embodiment is mostly the same as the light emitting device A of the first embodiment, the same portions are denoted by the same reference numerals, description thereof is omitted, and different portions are mainly described.

  The light emitting device A of the fourth embodiment is attached to the upper end portion of the building panel 8.

  That is, as shown in FIG. 7, the building panel 8 of the present embodiment is a so-called decorative wall whose front surface is a decorative surface 81, and is configured by accommodating the light emitting device A within the thickness of the building panel 8. Yes. More specifically, a storage recess 82 having a size substantially the same as the thickness of the light emitting device A is provided on the upper end of the building panel 8 and on the back side in the thickness direction, and the mounted light emitting device A has a thickness of the building panel 8. It will fit within. In addition, the code | symbol L in FIG. 7 has shown roughly the area | region of the light which the light-emitting device light-emitted.

  The light emitting device A includes a thin plate-shaped light guide member 2 and a light source 1 including an LED 11 attached to one end of the light guide member 2. The light-emitting device A is installed in a state where the pair of flat surfaces of the thin plate-shaped light guide member 2 are directed front and rear, that is, in a state where the incident part 4 is located below and the emission part 3 is located above.

  The exit part 3 of the present embodiment is not formed with a curved surface as in the first to third embodiments, and the ridge line 39 extends along the end face of the exit part 3 along a plane substantially parallel to the end face of the entrance part 4. The prism portion 38 is provided so as to be substantially perpendicular to the direction b (brightness uniforming direction f). That is, the light incident on the incident portion 4 from below is guided toward the emitting portion 3 in the light guide member 2, and the directional light from the LED 11 is sufficiently spread upward from the emitting portion 3. Further, the light emitted from the emission part 3 can irradiate the irradiated object in a converged state without spreading.

  Such a building panel 8 can be disposed, for example, as an interior wall panel on the front surface of a stud or on the front surface of an existing wall surface. According to the building panel 8 incorporating the light-emitting device A of the present embodiment, the light-emitting device A is composed mainly of the thin plate-shaped light guide member 2, and the thickness of the light-emitting device A is also thin. The light emitting device A of the present invention can be mounted while keeping the thickness of the building panel 8. Furthermore, since the light emitting device A is provided at the upper end of the building panel 8 and irradiates upward, it can be used as so-called indirect illumination for illuminating the ceiling surface or the upper part of the room. However, illumination without light unevenness can be performed.

  Moreover, you may make it install the building panel 8 so that the upper and lower sides of such a building panel 8 may be reversed and the step of a room may be illuminated.

  In addition, the light guide member 2 of the fourth embodiment may be formed so as to increase in thickness as it goes from the incident portion 4 to the emission portion 3, and instead of the above-described embodiment, the light-emitting device A is replaced. Of course, the light emitting device A of any of the first to third embodiments may be incorporated.

  As mentioned above, although the light-emitting device A of this invention was demonstrated based on the bathroom vanity 7 and the panel 8 for construction, the use place of the light-emitting device A of this invention is not specifically limited. Moreover, although the light guide member 2 of the light emitting device A is composed of a thin plate-like transparent member, for example, acrylic resin, glass, polycarbonate resin, epoxy resin, silicone resin, or the like can be suitably used.

  Furthermore, in 1st thru | or 3rd embodiment, although the 1st output surface 31 (1st light guide surface 5) was formed in the curved surface, and the 2nd output surface 32 was demonstrated in the example formed in the convex curve, Even if the 1st light emission surface 31 (1st light guide surface 5) and the 2nd light emission surface 32 are linear inclined surfaces, the same effect can be acquired.

  In the first embodiment, the first emission surface 31 is provided with a plurality of prisms 36 having a substantially triangular cross section. For example, the prism 36 may be a fine protrusion having a substantially semicircular cross section. Good. That is, a fine protrusion having a substantially semicircular cross-section in which the protrusion amount increases toward the outer side in the direction b along the end face of the other end of the light guide member 2, and the ridge line by the top of the fine protrusion has a luminance uniforming direction f (ie Of course, the light guide member may be provided so as to be substantially perpendicular to the direction b) along the end face of the other end of the light guide member, and a plurality of the ridge lines may be arranged in parallel so as to be parallel to each other.

  Furthermore, even if the shape of the end surface of the other end of the light guide member 2 is a substantially convex curved surface in a plan view such as a cylindrical lens, the irradiated object can be illuminated without spreading the emitted light. it can.

  In any of the above-described embodiments, the illumination cover 63 that is mounted may not be particularly mounted.

1 Light source 11 LED
DESCRIPTION OF SYMBOLS 2 Light guide member 3 Light emission part 31 1st light emission surface 32 2nd light emission surface 36 Prism 37 Reflective / refractive surface 38 Prism part 39 Ridge line 4 Incidence part 5 1st light guide surface 6 Housing 61 Light guide member housing 62 Light source housing A Light emitting device b Direction along the end face of the other end d Tooth angle e Virtual plane f Luminance uniform direction

Claims (2)

  A light source in which a plurality of LEDs are arranged in a straight line is provided along the end surface of one end of the plate-shaped light guide member, and the light source is provided at the other end of the light guide member opposite to the end where the light source is provided. An emission part for emitting light from the prism is provided, and the emission part is a prism part or Fresnel lens part composed of a plurality of prisms in which the tooth angle of the reflection / refractive surface of the prism having a substantially triangular cross section is increased toward the outer prism. The ridge line of the prism part or the Fresnel lens part is provided so as to be substantially perpendicular to the direction along the end face of the other end part.   A pair of planes of the plate-shaped light guide member are defined as vertically oriented, and a first surface is formed of a curved surface or an inclined surface positioned downward on the top surface of the other end portion of the light guide member where the emitting portion is located. A light guide surface is provided, and the light emitting section is formed of the first light guide surface and emits a part of the light from the light source, and the light source reflected from the first light guide surface. The light emitting device according to claim 1, further comprising: a second emission surface from which light is emitted, wherein the prism portion or the Fresnel lens portion is formed on the first emission surface.

Images