JP2017126541A - Light source device and light guide plate attachment mounted on light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device which achieves both sound quality of the light source which incorporates a speaker and a light source and quality as illumination, and which especially improves luminescence in the central region of a globe crown.SOLUTION: A globe 22 includes a light source 3 and a speaker 4. The speaker 4 is arranged close to a crown 22a of the globe 22. The light source 3 is arranged around the speaker 4 or at the back of the speaker. In this light source device 1, the crown 22a of the globe 22 includes a beam bent part and a beam diffusion part. The beam bent part is formed in a peripheral end region of the crown 22a of the globe 22, and bends incident light in the central region direction of the crown 22a. The beam diffusion part is formed in the central region of the crown 22a, irregularly reflects reflection light from the beam bent part, and diffuses and radiates it on a front surface of the speaker 4.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a light source device having a base and a built-in speaker, and a light guide plate attachment that is detachable from the light source device.

  There is a light bulb type light source device that can be mounted on a socket for a general incandescent light bulb. In recent years, a light source device in which not only a light source but also a speaker is accommodated in the globe has been proposed (see, for example, Patent Document 1). This light source device receives an audio signal in accordance with a wireless standard such as Bluetooth, and can emit not only lighting effects but also music and voice.

  If the sound wave signal emitted from the speaker goes into the globe or is repeatedly reflected and attenuated on the inner peripheral surface of the globe, the sound quality of the speaker will deteriorate. In order to improve the sound quality of the speaker, it is desirable to arrange the speaker closer to the top of the globe. Further, in order to improve the sound quality of the speaker, it is desirable that sound be emitted directly from the speaker to the outside of the globe without a sound wave shield on the front surface of the speaker.

  For this reason, a light source device has been proposed in which LEDs are arranged around a speaker in a ring shape so that the speaker and the LED are arranged on the same plane so that the LED is not covered on the front surface of the speaker (for example, Patent Documents). 1). There has also been proposed a light source device in which a speaker is installed at the top of the globe and an LED is installed behind the speaker away from the top of the globe (see, for example, Patent Document 2).

  In addition, these light source devices open the top of the globe except for the peripheral wall, that is, do not extend the globe to the front of the speaker, and completely open the front of the speaker, so that the sound wave disturbance from the front of the speaker. The thing is removed.

JP 2008-193189 A JP 2010-056059 A

  When LEDs are arranged around the speaker in a ring shape, there is no light source in the central region of the top of the globe, and the brightness of the central region of the top of the globe is reduced. In addition, when the LED is disposed behind the speaker, an area where the optical path is blocked by the speaker is generated, and the light does not reach the front surface of the speaker, and the luminance of the central area of the top of the globe is lowered.

  Therefore, the light emitted from the tops of these light source devices forms an annular pattern in which the central region is dark and the peripheral edge region is bright, and these light source devices are provided with speckled light distribution characteristics. The quality of the light source device as illumination will deteriorate. In particular, when an LED is used as a light source, the quality deterioration as illumination is remarkable due to the directivity of the LED.

  The present invention has been made to solve the above-described problems of the prior art, and its purpose is to achieve both the sound quality and the quality of illumination of a light source device incorporating a speaker and a light source, An object of the present invention is to provide a light source device that improves the brightness of the central region of the top of the globe.

  In order to achieve the above object, a light source device of the present invention is a light source device that receives power supply through a base, and has a globe having light permeability, and is housed in the globe, and the head of the globe. A speaker disposed near the top and having a diameter smaller than the inner diameter of the globe; and a light source housed in the globe and disposed around the speaker or behind the speaker farther from the top than the speaker. The top of the globe has a light beam bending portion for bending a light beam that passes through or is emitted from the side of the speaker and is incident on the top portion of the globe toward the front surface of the speaker, and a front region of the speaker. A light diffusing portion that is diffused and diffused and radiated on the front surface of the speaker by reflecting the reflected light reaching from the light bending portion.

  The top of the globe extends radially from the center of the top of the globe, and a plurality of arches hanging from the glove's peripheral wall, and the back of the arch facing the speaker, all of the range corresponding to the front of the speaker Or a groove formed in a part and serving as the light diffusing portion, and an outer surface of the arch that passes through or is emitted from the side of the speaker and is incident on the top of the head. It may be formed in whole or in part, inclined at an angle that reflects a part of incident light on the outer surface toward the cut groove, and an inclined surface that becomes the light beam bending portion.

  Out of the sole surface of the arch, the arch is formed at a position corresponding to an entrance of a light beam that passes through or is emitted from the side of the speaker and enters the top of the head, and radiates incident light over the entire inclined surface. A diffusing lens may be further provided.

  In order to achieve the above object, the light guide plate attachment according to the present invention is a light source with a speaker in which a speaker having a smaller diameter than the inner diameter of the globe is exposed from the opening of the globe whose top is open except for the peripheral edge. A light guide plate attachment attached to the apparatus, having a diameter larger than that of the opening from the center of radiation, formed at a peripheral end, and bending incident light to the peripheral end toward the center of radiation inside the member. A speaker comprising: a light beam bending portion; and a light beam diffusion portion that is formed in a region including the radiation center and diffuses and radiates light from the light beam bending portion to the outside of the member from the region including the radiation center. The light beam bending portion is placed on the optical path of a light beam that passes through or is emitted from the side of the speaker in a state of being covered with the opening. Then, the light beam is reflected on the front surface of the speaker, and the light beam diffusing portion is located on the front surface of the speaker in a state of being covered with the opening, and the reflected light from the light beam bending portion is irregularly reflected on the front surface of the speaker. It is characterized by making it.

  It consists of a plurality of arches that extend from the radiation center and have a length that can hang down on the peripheral wall of the globe, and the light diffusing portion is covered with the opening and is on the back surface of the arch facing the speaker. , A plurality of cut grooves formed in all or part of a range corresponding to the front surface of the speaker, and the light beam bending portion is covered with the opening, and the speaker among the outer surfaces of the arch. An inclined surface that is formed in all or part of the range where the light beam that passes through or is emitted from the side reaches and is inclined at an angle that reflects a part of the light beam that reaches the outer surface toward the groove. There may be.

  Of the sole of the arch, in the state of being covered with the opening, the arch is formed at a position corresponding to an entrance of a light beam that passes or is emitted from the side of the speaker, and the incident light is spread over the entire inclined surface. You may make it further provide the diffuser lens to diverge.

  The arch may be a protection bar that crosses the speaker at the front surface of the speaker, and a space between the arches may be a sound emitting hole that communicates the speaker with the outside.

  According to the present invention, even when the speaker is arranged near the top of the globe and the light source is arranged around or behind the speaker, the luminance of the central region of the top of the globe is improved, and the top of the globe is shined without any spots. Therefore, it is possible to achieve both the sound quality of the speaker and the lighting quality.

It is a perspective view which shows schematic structure of the light source device which concerns on 1st Embodiment. It is sectional drawing which shows schematic structure of the light source device which concerns on 1st Embodiment. It is a block diagram which shows the electric constitution of the light source device which concerns on 1st Embodiment. It is a top view of the crown part of the glove concerning a 1st embodiment. It is sectional drawing of the top part of the glove which concerns on 1st Embodiment. It is a schematic diagram which shows the optical path formed in the crown top part of the globe which concerns on 1st Embodiment. It is sectional drawing which shows schematic structure of the light source device which concerns on 2nd Embodiment. It is a perspective view which shows the structure of the light source device and light-guide plate attachment which concern on 3rd Embodiment.

(First embodiment)
FIG. 1 is a perspective view illustrating a schematic configuration of the light source device according to the first embodiment, and FIG. 2 is a cross-sectional view of the light source device according to the first embodiment. The light source device 1 has a base 23 that can be attached to a general incandescent light bulb socket, and is typically a light bulb type. The light source device 1 includes a light source 3 and a speaker 4 and has an illumination function and a sound emission function. The speaker 4 emits music and voice received wirelessly. The light source device 1 has an outer shape integrated with a casing 21 covered with a globe 22. The light source 3 and the speaker 4 are disposed in an internal space defined by the casing 21 and the globe 22.

  The housing 21 is a base of the light source device 1. The housing | casing 21 has a cylindrical shape, one end part is squeezed and the other end opens. The base 23 is fixed to the end portion of the casing 21 where the bottom end is narrowed. The casing 21 is desirably formed of a metal, resin, or ceramic having thermal conductivity. The heat conductive metal is, for example, aluminum, and the heat conductive resin is, for example, a carbon fiber such as a carbon nanotube.

  The globe 22 is a protective cover that covers the light source 3 and the speaker 4. The globe 22 has a cylindrical shape as a whole, and one end face is greatly opened except for the peripheral wall. The globe 22 is attached to the housing 21 by aligning the opening edge surface of the globe 22 and the opening edge surface of the housing 21 and aligning the center axes thereof. The glove 22 has a crown portion 22a, which is an end surface opposite to the opening end surface to be combined with the casing 21, bulging in a bowl shape.

  The globe 22 is made of a permeable material. The permeable material is, for example, glass, acrylic or polycarbonate. The circumferential surface of the globe 22 is given translucency by blasting or coding. The top 22a of the globe 22 remains transparent without being blasted or coded.

  The speaker 4 is a device that converts an electrical signal into a sound wave signal by physical vibration, and is, for example, a dynamic type. The speaker 4 has a cone shape or a dome shape that is smaller than the inner diameter of the globe 22. The speaker 4 is arranged such that the center of expansion is aligned with the common central axis of the globe 22 and the casing 21. Further, the speaker 4 is disposed near the top 22a of the globe 22 and directs the sound emitting surface of the sound wave signal toward the top 22a.

  The light source 3 includes a light emitting element such as an LED (Light Emitting Diode) element or an EL (Electro Luminescence) element. The light emitting element emits white light or single color or multiple colors other than white light. The light source 3 is disposed away from the speaker 4 and closer to the base 23, and is located behind the speaker farther from the top 22 a of the globe 22 than the speaker 4. The light source 3 may be installed in a ring shape around the common central axis of the globe 22 and the housing 21 along the inner peripheral surface of the globe 22 or the housing 21.

  FIG. 3 is a block diagram showing an electrical configuration of the light source device 1. As shown in FIG. 3, the light source device 1 is provided with a control board 5 that supplies power to the light source 3 and the speaker 4 and controls the light source 3 and the speaker 4. The control board 5 is accommodated in an internal space defined by the casing 21 and the globe 22. The control board 5 includes a power source 51, an audio control unit 52, and a light source control unit 53.

  The power supply circuit 51 receives power from an external commercial power supply via the base 23, performs AC / DC conversion by rectification and smoothing, and supplies drive power to the audio control unit 52 and the light source control unit 53 by DC / DC conversion. . The audio control unit 52 receives an audio signal via a wireless communication standard such as Bluetooth, WiFi, ZigBee, wireless LAN, or infrared by an antenna or an infrared light receiving unit, and demodulates, analog converts, and amplifies the audio signal to the speaker 4. Output. The light source control unit 53 supplies power to the light source 3 while controlling lighting, extinction, dimming, and toning of the light source 3.

  Based on FIGS. 4 and 5, the shape of the top 22a of the globe 22 will be described in detail. 4 is a top view of the parietal portion 22a, and FIG. 5 is a cross-sectional view of the parietal portion 22a. The top 22 a is composed of a plurality of transparent arches 71. The arch 71 gathers at the apex of the globe 22 with the base portion where the heel shape starts as the base end. In other words, the arch 71 extends radially from the apex of the globe 22 and hangs down on the peripheral wall of the globe 22. According to the aspect which comprises the top part 22a by the arch 71, between the arches 71 becomes the opening 71a which connects the speaker 4 and the exterior.

  The arch 71 serves as a protective bar that traverses the speaker 4 disposed on the top 22a side. The opening 71a between the arches 71 is a sound emitting hole that expands the directivity of the sound wave emitted from the speaker 4. An opening 71a communicating with the speaker 4 of the globe 22 is preferably formed at the center of the arch 71, and this opening 71a also serves as a sound emitting hole. For example, the top 22a of the globe 22 is composed of six arches 71 extending at equal positions, and includes six openings 71a between the arches 71 and one opening 71a at the apex of the globe 22 as sound emitting holes. .

  The base end portion 74 of each arch 71 has a foot back surface 74 a that is longer than the thickness of the peripheral wall of the globe 22, and protrudes from the peripheral wall of the globe 22 in the central axis direction. The speaker 4 does not extend directly under the base end portion 74 having the long foot back surface 74a, and the base end portion 74 has a light beam that passes between the peripheral wall of the globe 22 and the speaker 4 from the light source 3 at the top of the head. It overlaps with the area K reaching 22a. Therefore, the base end portion 74 becomes a light incident portion where the light enters the member of the top portion 22a. The base end portion 74 has a bay-shaped portion 75 that bulges toward the light source 3 on the foot back surface 74a that serves as an entrance.

  The outer surface 76 of the base end portion 74 corresponds to the skirt portion of the outer surface of the collar 22a. A light beam that passes through the side of the speaker 4 and enters the base end portion 74 via the bay-shaped portion 75 reaches the outer surface 76. The outer surface 76 is adjusted to an inclination angle that reflects a part of the reached light beam through the inside of the member of the arch 71 to the back surface 72 of the arch 71. The outer surface 76 is not totally reflected, and the remainder of the reached light beam is emitted from the outer surface 76 to the outside.

  The back surface 72 of each arch 71 corresponds to the inner surface of the heel of the crown portion 22a. An infinite number of notches 73 are formed on the back surface 72. The cut groove 73 is formed in a part or all of the range of the central region C of the top 22a of the back surface 72. The cut groove 73 is an infinite number of grooves formed in this range. The central region C of the top portion 22a is inside the peripheral end region of the top portion 22a serving as a light entrance portion, in other words, inside the base end portion 74, and corresponds to the front surface of the speaker 4. When the opening 71a is formed at the center of the top 22a, the opening 71a is removed.

  As shown in FIG. 6, a part of the light beam traveling from the rear side of the speaker 4 toward the top 22 from the light source 3 passes through the side of the speaker 4 without being shielded by the speaker 4. The light enters the end 74. In the base end portion 74, the bay portion 75 diverges the incident light on the base end portion 74 so as to spread evenly on the outer surface 76. In other words, the bay portion 75 is an example of a diverging lens that diverges the light incident on the top 22 a to the outer surface 76. The bay portion 75 may be omitted if a sufficient amount of light can be guided to the outer surface 76 even if the foot rear surface 74a of the base end portion 74 is flat.

  The base end portion 74 reflects a part of the light beam incident from the light source 3 through the side of the speaker 4 toward the groove 73. Specifically, the outer surface 76 of the base end portion 74 transmits a part of incident light and radiates it to the outside of the globe 22, and reflects a part of the incident light toward the groove 73. That is, the outer surface 76 of the base end portion 74 serves as a light beam bending portion that bends a part of the light beam incident on the peripheral end of the top portion 22a to the groove 73 formed in the central region C of the top portion 22a.

  It is desirable that the outer surface 76 reflects the light beam so as to spread evenly in the range in which the groove 73 is formed. Therefore, it is desirable that the outer surface 76 be formed by continuously connecting inclined surfaces having a plurality of types of angles. Further, it may be a light-bending portion utilizing refraction, and an inclined surface that refracts incident light toward the groove 73 may be formed on the bottom surface 74 a of the base end portion 74.

  The notch groove 73 diffusely reflects the reflected light from the base end portion 74 on the front surface of the speaker 4 and diffuses and radiates it toward the outside of the globe 22 on the front surface of the speaker 4. That is, the notch groove 73 is an example of a light beam diffusing unit that diffusely reflects light beams on the front surface of the speaker 4. In order to make the back surface 72 of each arch 71 function as a light diffusing portion, it is only necessary to diffusely reflect it on the front surface of the speaker 4, and the surface is not limited to the groove 73 and may be roughened by blasting or the like.

  In the light source device 1, the light beam from the light source 3 does not reach the position behind the speaker 4. However, a part of the light beam passing by the side of the speaker 4 is reflected by the outer surface 76 of the base end portion 74 to the front surface of the speaker 4, and a groove 73 is formed on the front surface of the speaker 4. By diffusely radiating the reflected light by irregular reflection, the function of the light guide plate is imparted to the top portion 22a, and the luminance of the central region C of the globe 22 which is shaded by the speaker 4 is improved.

  As described above, the light source device 1 includes the globe 22 formed of a translucent material, the light source 3 and the speaker 4 accommodated in the globe 22. The speaker 4 is disposed near the top 22 a of the globe 22. The light source 3 is arranged behind the speaker farther from the top 22 a than the speaker 4. In the light source device 1, the top portion 22 a of the globe 22 includes a light beam bending portion and a light beam diffusion portion.

  The light beam bending portion is formed in the peripheral end region of the crown portion 22a of the globe 22, and bends the light beam that passes through the side of the speaker 4 and enters the peripheral region toward the center region of the crown portion 22a. The light diffusing portion is formed in the central region of the top portion 22a, diffuses and reflects the reflected light from the light bending portion, and diffuses and radiates it on the front surface of the speaker 4.

  Thereby, the top part 22a of the globe 22 becomes a light guide plate that emits light of the central region C by incident light at the peripheral edge. The brightness of the center region C, which is the shadow of the speaker 4 and hitting the front surface of the speaker 4, is improved, and the top portion 22a can be illuminated with no spots. Even in the light source device 1 having the speaker 4, the quality of the speaker 4 Both lighting quality can be achieved.

  Further, the top 22 a of the globe 22 is formed by a plurality of arches 71. The arch 71 extends radially from the center of the parietal portion 22a and hangs down to the peripheral end region of the parietal portion 22a. In the back surface 72 of the arch 71, a groove 73 serving as a light diffusing portion is formed at a position corresponding to the central region of the top portion 22a. Of the outer surface 76 of the base end portion 74 of the arch 71, a position corresponding to the peripheral end region of the top 22a is inclined at an angle that reflects a part of the incident light to the outer surface 76 toward the groove 73. A surface was formed as a light bending portion.

  Thereby, the opening 71 a between the arches 71 becomes a sound emitting hole that expands the directivity of the sound wave emitted by the speaker 4, and the arch 71 becomes a protective bar that crosses the speaker 4. For this reason, a light diffusing unit is installed on the front surface of the speaker 4, but it is difficult for problems such as the sound of the speaker 4 to be heard and the diffuser effect by the opening 71 a can be obtained. Therefore, the light source device 1 can have a high quality sound emission function as well as a high quality illumination function.

  Note that the top portion 22a formed by the arch 71 does not need to have a curved saddle shape, and if the outer surface 76 of the base end portion 74 has an inclination for reflection to the cut groove 73, the center portion 22a may be centered. The outer surface of the region may be flat. Further, the outer surface 76 may be a straight line or a curved surface as long as it is an inclined surface that can reflect the light beam to the groove 73.

(Second Embodiment)
The light source device 1 according to the second embodiment will be described in detail with reference to FIG. About the detailed shape of the top part 22a of the globe 22, since it is the same as 1st Embodiment, detailed description is abbreviate | omitted.

  As shown in FIG. 7, in the light source device 1, a light source 3 and a speaker 4 are arranged side by side at the same height. The speaker 4 is installed near the top portion 22a, and the light source 3 is provided around the speaker 4 in a ring shape. The light source 3 emits light by the side of the speaker 4, and most of the light enters the peripheral end region of the top 22 a. That is, even in the positional relationship between the speaker 4 and the light source 3, there are few light rays that directly reach the front surface of the speaker 4.

  Even in the light source device 1, a part of the light beam in the peripheral end region of the top portion 22 a is bent on the front surface of the speaker 4 with the outer surface 76 of the base end portion 74 as a reflection surface, and is provided on the front surface of the speaker 4. Diffuse radiation is caused by irregular reflection at the notch groove 73. Thereby, the brightness | luminance of the center area | region of the top part 22a of the globe 22 improves, and even if it is the light source device 1 which has the speaker 4, a high quality illumination function can be provided.

  Further, the top 22a of the globe 22 can be formed by a plurality of arches 71 as in the first embodiment, and the diffuser effect by the opening 71a can be obtained. Therefore, the light source device 1 can have a high quality sound emission function as well as a high quality illumination function.

(Third embodiment)
The light guide plate attachment according to the third embodiment will be described in detail with reference to FIG. The same configurations and functions as those of the first and second embodiments of the light source device 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The light source device 1 according to the third embodiment includes the light source 3 installed behind the speaker 4 near the top 22a or the light source 3 installed around the speaker 4. The light ray enters from the light source 3 to the peripheral end region of the top portion 22a. In the light source device 1, an opening 22 b having a size excluding the peripheral edge is formed in the top 22 a of the globe 22. The opening 22b has a slightly smaller diameter than the diameter of the top 22a of the globe 22, and exposes the speaker 4.

  The light guide plate attachment 7 is detachably attached to the top 22a of the light source device 1 so as to cover the opening 22b. The light guide plate attachment 7 has a diameter that reaches at least the peripheral end surface 22c around the opening 22b, and is attached using the peripheral end surface 22c as a pedestal. The light guide plate attachment 7 has the same shape as that of the first embodiment, and is configured by arranging arches 71 radially. The arch 71 has a bay-shaped portion 75 serving as a diverging lens and an outer surface 76 serving as a light beam bending portion at the base end portion 74, and a notch groove 73 serving as a light diffusion portion on the back surface 72.

  A concave portion 22d having the same width as the base end portion 74 is formed on the circumferential end surface 22c of the globe 22 at equal intervals with the arrangement angle of the arch 71. The light guide plate attachment 7 is attached by fitting the base end portion 74 of the arch 71 into the recess 22d.

  Thus, even if the light guide plate attachment 7 is the light source device 1 in which the top 22a of the globe 22 does not have the light beam bending portion and the light diffusion portion, the light guide plate attachment 7 can diffuse and radiate light rays on the front surface of the speaker 4. The luminance of the central region C of the top 22 of the head can be improved. Further, the arch 71 serves as a protection bar that crosses the speaker 4, and the opening 71a between the arches 71 provides a diffuser function.

  In addition, the attachment aspect of the light-guide plate attachment 7 is not restricted to this, Various methods are applicable. For example, the light guide plate attachment 7 is provided with a cylindrical cup that envelops the entire arch 71. The cylindrical cup extends below the bottom surface of the base end portion 74 and has a diameter slightly larger than the diameter of the globe 22. The light guide plate attachment 7 may be fitted into the top 22 a of the light source device 1 so as to wrap the circumferential surface of the globe 22 with this cylindrical cup.

DESCRIPTION OF SYMBOLS 1 Light source device 21 Case 22 Globe 22a Top part 22b Opening 22c Opening edge end surface 22d Recess 23 Base 3 Light source 4 Speaker 5 Control base 51 Power supply circuit 52 Audio control part 53 Light source control part 7 Light guide plate attachment 71 Arch 71a Opening 72 Back surface 73 Notch groove 74 Base end portion 74a Foot bottom surface 75 Bay-shaped portion 76 Outer surface

Claims (8)

A light source device that receives power supply through a base,
A globe with light transmission,
A speaker housed in the globe, disposed near the top of the globe, and having a smaller diameter than the inner diameter of the globe;
A light source housed in the globe and disposed around the speaker or behind the speaker farther from the top of the head than the speaker;
With
The top of the glove is
A light beam bending portion that bends the light beam that has passed through the side of the speaker or emitted from the side and entered the top of the head toward the front surface of the speaker;
A light diffusing portion that is formed in a front region of the speaker, diffusely reflects reflected light reaching from the light beam bending portion, and diffuses and radiates on the front surface of the speaker;
Providing
A light source device characterized by the above. The top of the glove is
A plurality of arches that radiate from the center of the top of the head and hang down on the peripheral wall of the globe;
Of the back surface of the arch facing the speaker, formed in all or a part of the range corresponding to the front surface of the speaker, and a groove formed as the light diffusing portion,
Of the outer surface of the arch, the outer surface of the arch is formed in all or part of the range where the light beam that passes through or is emitted from the side of the speaker and is incident on the top of the head reaches the outer surface. An inclined surface that is inclined at an angle that reflects the portion toward the cut groove, and serves as the light beam bending portion,
Providing
The light source device according to claim 1. Out of the sole surface of the arch, the arch is formed at a position corresponding to an entrance of a light beam that passes through or is emitted from the side of the speaker and enters the top of the head, and radiates incident light over the entire inclined surface Further comprising a diffusing lens;
The light source device according to claim 2. The arch is a protective bar that crosses the speaker at the front of the speaker;
The space between the arches is a sound emission hole that allows communication between the speaker and the outside.
The light source device according to claim 2, wherein: A light guide plate attachment that is attached to a light source device with a speaker that exposes a speaker having a diameter smaller than the inner diameter of the globe from the opening of the globe that opens at the top of the head except for the periphery,
The diameter is larger than the opening from the radiation center,
A light beam bending portion that is formed at the peripheral end portion and bends the incident light to the peripheral end portion toward the center of radiation inside the member;
A light diffusing portion that is formed in a region including the radiation center, diffusely reflects the light beam from the light beam bending portion, and diffuses and radiates from the region including the radiation center to the outside of the member;
With
Covered to cover the opening of the light source device with the speaker,
The light beam bending portion is located on the optical path of the light beam that passes or exits from the side of the speaker in the state of being covered with the opening, reflects the light beam to the front surface of the speaker,
The light diffusing portion is located on the front surface of the speaker in a state of being covered with the opening, and diffusely reflects the reflected light from the light beam bending portion on the front surface of the speaker;
Light guide plate attachment characterized by It consists of a plurality of arches extending from the radiation center and having a length that can hang down on the peripheral wall of the globe,
The light diffusing portion is a plurality of grooves formed in all or part of a range corresponding to the front surface of the speaker, of the back surface of the arch facing the speaker in a state of being covered with the opening,
The light beam bending portion is formed on all or a part of the range of the light beam that passes through the side of the speaker or is emitted from the side of the outer surface of the arch in a state of being covered with the opening. An inclined surface that is inclined at an angle that reflects a part of the light beam reaching the outer surface toward the groove.
The light guide plate attachment according to claim 5. Of the sole of the arch, in the state of being covered with the opening, the arch is formed at a position corresponding to an entrance of a light beam that passes or is emitted from the side of the speaker, and the incident light is spread over the entire inclined surface Further comprising a diffusing lens for diverging,
The light guide plate attachment according to claim 6. The arch is a protective bar that crosses the speaker at the front of the speaker;
The space between the arches is a sound emission hole that allows communication between the speaker and the outside.
The light guide plate attachment according to claim 6 or 7.