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WO2017110366A1 - Système d'éclairage de véhicule - Google Patents

Système d'éclairage de véhicule Download PDF

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Publication number
WO2017110366A1
WO2017110366A1 PCT/JP2016/085048 JP2016085048W WO2017110366A1 WO 2017110366 A1 WO2017110366 A1 WO 2017110366A1 JP 2016085048 W JP2016085048 W JP 2016085048W WO 2017110366 A1 WO2017110366 A1 WO 2017110366A1
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WO
WIPO (PCT)
Prior art keywords
light
light guide
incident
lighting device
guide
Prior art date
Application number
PCT/JP2016/085048
Other languages
English (en)
Japanese (ja)
Inventor
理祥 亀井
Original Assignee
林テレンプ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 林テレンプ株式会社 filed Critical 林テレンプ株式会社
Priority to JP2017557811A priority Critical patent/JP6761429B2/ja
Priority to CN201680075551.1A priority patent/CN108430830B/zh
Publication of WO2017110366A1 publication Critical patent/WO2017110366A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/20—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for lighting specific fittings of passenger or driving compartments; mounted on specific fittings of passenger or driving compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/20—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for lighting specific fittings of passenger or driving compartments; mounted on specific fittings of passenger or driving compartments
    • B60Q3/217—Doors, e.g. door sills; Steps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction

Definitions

  • the present invention relates to a vehicular illumination device including a long light guide and a light source.
  • Patent Document 1 discloses a vehicular interior illumination device that linearly illuminates a ceiling by extending linearly along the front-rear direction on left and right sides of the ceiling in the vehicle compartment.
  • This illuminating device includes a light guide that extends linearly and a light emitting diode (LED) that introduces light into the light guide from an end of the light guide.
  • a minute reflecting means is formed on the rear surface facing the front surface which is the light output surface of the light guide so that the light introduced into the light guide is efficiently emitted to the front surface. It is stated that it is good.
  • Patent Document 2 discloses a vehicular lamp including a plurality of light sources and a single light guide that can guide light emitted from the plurality of light sources from one end surface.
  • the light guide body is called a single extending element that extends in a predetermined direction and emits the light to be guided from the surface of the light guide body or the other end surface opposite to the plurality of light sources. It has a body part.
  • the light guide is arranged at one end of the extending element so as to be branched from the extending element, and the incident surface on which light emitted from each of the plurality of light sources is incident (corresponding to the one end face) And a plurality of branch portions called a plurality of incident elements.
  • a light source is arranged so as to face an end surface in the longitudinal direction of a long light guide, and light emitted from the light source is taken in from the end surface. If the light source is arranged only on the end face side of one end of the light guide, if the length (extension distance) of the light guide becomes longer, the light does not reach the end face side of the other end, or the amount of light that reaches It will be insufficient, and it is difficult to emit light uniformly. In addition, when the light sources are arranged on both end faces of the light guide, the power harness connecting each light source is required for the length of the light guide, or for the length of the light guide or more.
  • an object of the present invention is to provide an illumination device that can uniformly emit a long light guide and can reduce the length of a harness for supplying power to a light source.
  • an object of the present invention is to provide an illuminating device that suppresses an increase in the required number of LED substrates and eliminates cost, process, and design problems.
  • the vehicular lighting device includes a long light guide having a pair of end surfaces, and a light incident portion having an incident surface on one side surface of the light guide between the pair of end surfaces.
  • a light source is disposed integrally with the light guide and is opposed to the incident surface.
  • the vehicular illumination device In the field of a vehicular illumination device using a long or large light guide, the vehicular illumination device according to the present invention has a pair of end surfaces instead of the end surfaces of the light guide due to the configuration having the light incident portion. Since the light from the light source can be introduced into the light guide from the middle part between the two, the long light guide can be made to emit light uniformly, and in addition, for example, when a plurality of light sources are arranged However, since the light sources are close to each other, the number of the substrates and the harness connecting the plurality of substrates can be reduced by making the substrates for the light sources common.
  • the vehicle lighting device according to the present invention has a light source in the middle of the light guide, the length of the power harness can be reduced as compared with the conventional one, and the assembly structure of the board can be abolished and saved. Excellent effects on cost, process, and design, such as space saving, can be obtained.
  • the light emitting range in the light guide including the vicinity of both ends of the light guide is not limited, and the light emitting range is maximized. Can be secured.
  • the vehicular illumination device having added value that can cope with such functional illumination requiring a large amount of light and further lengthening and enlargement of the light guide. Can be provided.
  • the light incident part is preferably formed to protrude from the one side surface of the light guide, and may further have a leg part branched into a plurality together with the structure, and an incident surface is formed on the leg part. Each is preferably formed. With this protruding structure and the configuration of the incident surface, light from the light source can be efficiently guided to the light guide. Further, the light branched from the incident surface of one leg is guided to one end surface of the light guide by the legs branched into a plurality, and the light from the incident surface of the other leg is guided to the other end of the light guide. The light can be guided toward.
  • the light incident part is formed so as to protrude in a direction different from the light exiting direction from the light exiting surface that is one of the side surfaces of the light guide, so that the direction of each normal of the incident surface and the light exiting surface is Preferably they are different.
  • the angle formed by the normal line of the incident surface of the light entrance of the light guide and the normal line of the light output surface of the light guide is approximately 90 °. Is preferred. At this time, the leakage light output rate can be reduced most.
  • the light incident part of the light guide may have a wide part with a large cross-sectional area as it approaches the connection part between the light guide and the light incident part at a base part protruding from one side of the light guide. Good. With this configuration, light can be efficiently incident from the entire root portion to the elongated main body portion of the light guide body, and the length of the light guide body can be reduced while reducing the amount of leakage light in the light incident portion. The light guide efficiency to the can be increased.
  • a convex portion positioned opposite to the light incident portion may be formed on the other side surface facing the one side surface where the light incident portion is formed.
  • a plurality of recesses may be formed on the reflecting surface of the light guide opposite to the light exit surface so as to be aligned in the longitudinal direction of the light guide with a space therebetween.
  • the concave portions may be partially arranged in a plurality of rows.
  • the light guide may have a rectangular cross-sectional shape orthogonal to the longitudinal direction.
  • the light incident portion is formed on the first side surface, and the second side adjacent to the first side surface.
  • the light exit surface is formed on the side surface, the reflective surface is formed on the third side surface facing the second side surface, and the convex portion is formed on the fourth side surface facing the first side surface.
  • a light guide can be easily injection-molded.
  • FIG. 3 is a sectional view taken along the line III-III in FIG. 2. It is the A section enlarged view of FIG. 3A. It is a perspective view which shows the light guide which concerns on one Embodiment. It is a perspective view which shows the other example of the said light guide. It is a perspective view which shows the light-incidence part of the light guide which concerns on one Embodiment. It is the perspective view seen from the lower part which shows a recessed part. It is a cross-sectional view of a recessed part.
  • FIG. 3 is a sectional view taken along the line III-III in FIG. 2. It is the A section enlarged view of FIG. 3A. It is a perspective view which shows the light guide which concerns on one Embodiment. It is a perspective view which shows the other example of the said light guide. It is a perspective view which shows the light-incidence part of the light guide which concerns on one Embodiment. It is the perspective view seen from the lower part which shows a recessed part. It is
  • FIG. 3 is a transparent enlarged view of a portion C in FIG. 2.
  • FIG. 3 is a cross-sectional view taken along the line IX-IX in FIG. 2. It is the B section enlarged view of FIG. 9A.
  • It is a perspective view for demonstrating the extension angle with respect to the light guide of a light-incidence part. It is the figure which looked at FIG. 10A in the longitudinal direction of the light guide. It is a characteristic view which shows the relationship between the extension angle and the leaking light emission rate in the light emission surface.
  • It is a top view for demonstrating the protrusion angle with respect to the longitudinal direction of a light guide of the leg part of a light-incidence part.
  • FIG. 1 shows an exploded perspective view of the lighting device 1 according to the present embodiment
  • FIG. 2 shows a front view of the lighting device 1.
  • the front side is the surface side that emits light from the lighting device 1.
  • the illuminating device 1 is, for example, a skin-transmitting illuminating type illuminating device attached to a decoration member (ornament) such as a door trim of an automobile.
  • the lighting device 1 includes at least a skin 100, an outer lens 200, a fastening portion 300, a front case 400, a light guide 500, a light emitting portion 600, a fixing claw 700 for attaching the light guide 500 to the front case 400, and A back case 800 is included, and these components are stacked in this order from the front side to the back side.
  • the outer skin 100 is an outermost member that covers the front side of the lighting device 1, and the material is preferably a knitted fabric, for example.
  • the material of the skin 100 can be widely used as long as it transmits light.
  • Illumination device 1 may be, for example, a direct illumination type that is not a skin transmissive type, and when used for the ceiling of an automobile, a ceiling base material (not shown) whose surface is bonded to the surface is used as the skin. It is also possible to use a lighting device that is embedded in a hollow portion formed in a long hole shape in the ceiling base material and is cut out and the outer lens 200 described later is exposed in the vehicle interior.
  • the outer lens 200 is disposed oppositely in the immediate vicinity of the light exit surface 550 of the light guide 500, as shown in an enlarged view of a portion A (FIG. 3B) in the III-III sectional view (FIG. 3A) of FIG. It has a function of transmitting and protecting the light guide 500.
  • the outer lens 200 is formed, for example, by molding a transparent or translucent acrylic resin such as PMMA (polymethyl methacrylate) or a thermoplastic resin such as PC (polycarbonate).
  • the outer lens 200 may be added with a scattering agent or colored milky white.
  • the fastening portion 300 can be omitted when the lighting device 1 is a direct illumination type that is not a skin-transmitting type as described above, for example.
  • the front case 400 may be the ceiling base material.
  • a back case 800 is fastened to the front case 400 on the opposite side of the fastening portion 300.
  • the fastening method between the front case 400 and the back case 800 is as shown in FIG. 3B.
  • a known fastening method can be applied, for example, by fastening the fixing screw BS through TH1 and TH2.
  • the light guide 500 is a member that causes incident light to be reflected on the inner surface to propagate inside, and to emit light from various places to the outside. Therefore, the light guide 500 is preferably made of, for example, a transparent thermoplastic resin that can be injection molded such as acrylic or PC, or a thermosetting resin such as silicone. However, the material of the light guide 500 is not limited to this, and a transparent material such as glass that is not a resin can also be used. As shown in FIG. 4, the light guide 500 according to the present embodiment has a long shape and is a portion between both end surfaces 511 and 512 in the longitudinal direction X, and is a side surface different from the both end surfaces 511 and 512. One light incident portion 520 is provided in the middle of a certain side surface. Note that there may be a plurality of light incident portions 520 as shown in FIG.
  • the light incident portion 520 is integrally formed so as to extend from one side surface 530 of the light guide 500, and is branched into a bifurcated shape at the branch portion 525, and the method is started from one side surface 530. It has the 1st leg part 521 and the 2nd leg part 522 which are the multiple (2 in this embodiment) leg part which protrudes in the direction away from a linear direction.
  • the end surfaces of the first leg 521 and the second leg 522 are incident surfaces 523 and 524, respectively, and corresponding LEDs 610 and 611 (FIG. 1) so as to face the incident surfaces 523 and 524, respectively. ) Is arranged.
  • the first leg portion 521 and the second leg portion 522 protrude from the side surface of the light guide so as to bend outward, and light from the LEDs 610 and 611 entering from the incident surfaces 522 and 523 is respectively reflected on the other side.
  • the light is guided into the light guide 500 while being directed toward the legs. Specifically, the light from the incident surface 523 of the first leg 521 is guided toward the one end surface 511 (FIG. 4) of the light guide 500 by the legs 521 and 522 branched in two. Light from the incident surface 524 of the second leg 522 can be guided toward the other end surface 512 (FIG. 4) of the light guide 500.
  • the present invention can be applied to a portion of the light guide that cannot secure a space for mounting the light source at both ends.
  • Each of the first leg 521 and the second leg 522 in FIG. 6 has a rectangular cross section orthogonal to the light incident direction, for example, and has a constant cross-sectional area in the vicinity of the incident surfaces 523 and 524.
  • Wide portions 526 and 527 are formed in the base portion near the connection portion 528 to the light guide 500, and the cross-sectional area perpendicular to the traveling direction of light increases as the distance from the intermediate portion approaches the connection portion 528.
  • the wide portions 526 and 527 allow light to efficiently enter the entire base portions of the first leg portion 521 and the second leg portion 522 and the long main body portion of the light guide 500. It is possible to increase the light guide efficiency in the longitudinal direction X (and -X direction) of the light guide 500 while reducing the amount of light leakage at the first leg 521 and the second leg 522. Can do.
  • the light guide 500 has a rectangular cross section orthogonal to the longitudinal direction X of the main body portion, for example, and is one of the light guides in which the first leg portion 521 and the second leg portion 522 are protruded.
  • a convex portion 541 is integrally formed and extended.
  • the convex part 541 is located opposite to the connection part 528, and the light guided from the first leg part and the second leg part by the convex part 541 becomes leakage light on the other side surface 540.
  • the convex portion 541 has four surfaces, and is inclined ⁇ 20 ° with respect to the top surface and the bottom surface orthogonal to the one side surface 530 and the other side surface 540 and the side surface of the light guide. It has two side surfaces 541a and 541b that are formed. Since the light reflected by the two side surfaces 541a and 541b of the convex portion 541 is guided more efficiently in the longitudinal direction X of the light guide 500, the light guiding efficiency can be further increased and the convexity can be increased. Abnormal light emission near the light incident part 520 that frequently occurs when the part 541 is not present can be suppressed.
  • the side surface of the convex portion 541 is planar, but may be formed so as to curve outward. According to this curved shape, the light guide efficiency can be further increased.
  • the light output from the light guide 500 is made from the light output surface 550 which is one of the remaining two side surfaces of the light guide 500 orthogonal to the one side surface 530 and the other side surface 540. That is, the direction of the normal line N1 of the incident surfaces 523 and 524 of the light incident portion 520 parallel to the one side surface 530 is different from the direction of the normal line N2 of the light output surface 550. In this embodiment, both normal lines N1 and N2 form. The angle is approximately 90 °.
  • the fourth side surface is a reflection surface 560 that faces the light exit surface 550. In FIG. 6, the light exit surface 550 forms a lower surface, and the reflection surface 560 forms an upper surface.
  • a light incident portion 520 is formed on one side surface 530 that is the first side surface
  • a light exit surface 550 is formed on a second side surface adjacent to the first side surface 530
  • a third surface that faces the second side surface 550 is formed on a reflection surface 560
  • a convex portion 541 is formed on the fourth side surface 540 facing the first side surface 530.
  • the first leg 521 and the second leg 522 are formed so as to protrude in a direction different from the light emission direction (light emission direction) from the light guide 500.
  • a plurality of fine concave portions (optical patterns) 561 serving as reflecting means are arranged in the longitudinal direction X of the light guide 500 at intervals on the reflective surface 560 that is a surface facing the light exit surface 550 of the light guide 500. It is formed as follows. In the optical pattern 561, for example, as can be grasped from a perspective view seen from below shown in FIG.
  • a concave portion that is a prism P having an oval shape in the front view and a minimum depth of about several hundreds ⁇ m is formed as a light incident portion
  • the major axis of the ellipse is tilted by about tens to hundreds of degrees with respect to the light guide direction in the light guide 500, that is, the longitudinal direction X (hereinafter, this angle is referred to as an arrangement angle). It is also arranged in a predetermined pattern.
  • the cross section perpendicular to the major axis of the prism P is a semicircular shape with a radius R.
  • the prism P is arranged so that the major axis thereof is perpendicular to the light guide direction, too much light is emitted from the prism P toward the outside of the light guide 500. In order to prevent this, it is preferable that the prism P is arranged to be inclined at an arrangement angle in the above-described range other than 90 ° to control the light output.
  • the arrangement angle of the prism P is variable with respect to the longitudinal direction X.
  • the prism P is arranged at an arrangement angle in which the major axis direction of the prism P is perpendicular to the light guide direction. In the vicinity of the light incident part 520, in order to reduce light leakage, As described above, the arrangement angle of the prism P is changed.
  • the radius R and the depth D of the prism P are adjusted so as to be smaller than the other portions in the vicinity of the light incident portion 520. This is because the entire light guide 500 is caused to emit light uniformly by reducing the amount of light emitted in the vicinity of the light incident portion 520.
  • the optical pattern 561 is formed simultaneously with the injection molding of the light guide 500, for example. Specifically, a fine optical pattern such as the optical pattern 561 can be formed by processing the molding die of the light guide 500 by blasting, laser processing, etching, or the like.
  • the concave portions are formed so as to be arranged in three rows only in the vicinity of the light incident portion 520.
  • the concave portions In the vicinity of the light incident part 520, there is a possibility that a brightness deviation occurs in the width direction Y orthogonal to the longitudinal direction X of the light guide 500. Therefore, by forming the concave portions so as to form a plurality of rows in the width direction Y of the light guide 500, light scattering is increased in the vicinity of the light incident portion 520, and the light guide 500 emits light uniformly. That is, it is possible to emit light uniformly from the light exit surface 550 of the light guide 500.
  • the first and second leg portions 521, 522 and the convex portion 541 are unevenly distributed on the side opposite to the light exit surface side in the one side surface 530 and the other side surface 540, that is, these light guides are arranged.
  • 6 is formed so as to be positioned substantially on the upper half side, which is the upper side in FIG. 6, and the connection portion 528 of the light incident portion 520 and the like are formed on the lower half sides of both side surfaces 530 and 540. No fitting part 580 is formed.
  • a flange portion 570 protrudes outward in the same plane as the reflective surface 560 at the edge of both side surfaces 530 and 540.
  • the light guide 500 is formed along the longitudinal direction X.
  • the fitting portion 580 shown in FIG. 6 of the light guide 500 is fitted into the long groove formed in the front case 400 or the ceiling base material shown in FIG.
  • the light guide 500 can be locked to position the light guide 500 in the fitting direction, and the light exit surface 550 is substantially flush with the front side of the front case 400 or the ceiling base material in FIG. It becomes possible to improve the designability.
  • the flange portion 570 of FIG. 6 is formed over almost the entire length of the light guide 500, only the portions corresponding to the light incident portion 520 and the convex portion 541 are not formed. This is to prevent the above-described function of the convex portion 541, that is, the function of improving light guiding efficiency and the function of suppressing abnormal light emission from being deteriorated.
  • the LEDs 610 and 611 allow the luminescence light to enter the corresponding incident surfaces 523 and 524, respectively.
  • the LEDs 610 and 611 can be selected widely regardless of the manufacturer or the like as long as the area of the light emitting surface is the same as or smaller than the area of the incident surfaces 523 and 524.
  • the FPC 630 is a substrate on which an electric circuit is formed by bonding an insulating flexible base film (polyimide or the like) and a conductive metal such as copper foil, and an LED substrate to which an LED is attached and which receives power supply It is.
  • the LEDs 610 and 611 are attached to one FPC in this embodiment, but may be attached to separate FPCs.
  • the heat sink 650 is made of a material having high thermal conductivity such as aluminum, copper, and iron, and has a configuration in which the area of the heat radiation surface is increased, and is an enlarged view of a portion B in the IX-IX cross-sectional view (FIG. 9A) of FIG. 9B), the LED 610, 611 or the FPC 630 is disposed in contact with or near the LED 610, 611 or the FPC 630, thereby dissipating heat generated from the LEDs 610, 611.
  • the heat sink 650 can prevent problems such as the incident surfaces 523 and 524 of the light guide 500 being melted by the generated heat and the peripheral components of the LEDs 610 and 611 being burnt.
  • the lifetime of the LEDs 610 and 611 themselves can be prevented from being reduced due to heat generation.
  • the heat sink 650 may be omitted depending on the required brightness of the lighting device, that is, depending on the type of LED used, because such a separate heat dissipation component is not necessary.
  • the fixing claw 700 is formed separately from the front case 400 and the light guide 500, and is inserted into a hole HL formed in the front case 400 as shown in FIG. It is used to fix the light guide 500 to the front case 400 by locking it to the side surface of 570 with mechanical frictional force.
  • the material of the fixing claw 700 is not particularly limited as long as it has vibration resistance, heat resistance, and the like in order to fix the light guide 500 to the front case 400.
  • the back case 800 is made of a resin such as PMMA, PC, or ABS, or other material, and functions as a housing that accommodates the light guide 500 or the like.
  • the back case 800 is preferably made of a black light-shielding material so as not to cause light leakage.
  • the illuminating device 1 As described above, according to the illuminating device 1 according to the present embodiment, light is incident on the middle of one side surface 530 of the light guide 500 different from the both end surfaces 511 and 512 in the longitudinal direction X of the light guide 500 in FIG.
  • the long or large light guide 500 can uniformly emit light, and the LEDs 610 and 611 in FIG. 8 are in the middle of one side surface 530 of the light guide 500. Since it exists close to the vicinity, it is possible to provide an illumination device that can reduce the length of the harness for supplying power to the LEDs 610 and 611.
  • the LEDs 610 and 611 are present in the vicinity of the light incident part 520 in the middle of the light guide 500, the LEDs 610 and 611 can be mounted on one LED substrate, It is possible to provide an illuminating device that suppresses an increase in the required number of LED substrates and eliminates problems in cost, process, and design.
  • the LEDs 610 and 611 are disposed on the one end surface 511 and the other end surface 512 that are both ends of the light guide 500, light is emitted from the vicinity of both ends where the LEDs 610 and 611 are disposed in terms of light emission uniformity.
  • the light-emitting range in the light guide 500 is limited, but the lighting device 1 according to the present embodiment maximizes the light-emitting range including the vicinity of both ends of the light guide 500. Can be secured.
  • FIG. 10A when the height direction (upward direction in the figure) Z orthogonal to both the longitudinal direction X and the width direction Y of the light guide 500 is set to a direction opposite to the light exit direction, FIG.
  • FIG. 10B which is a view in the ⁇ X direction
  • the extension angle ⁇ 1 changes as 0 ° ⁇ ⁇ 1 ⁇ 90 °.
  • the light (hereinafter also referred to as leakage light) from which the light from the light incident part 520 exits from the periphery of the connection part 528 to the outside of the light guide 500 is critical in the propagation process of light that repeats total reflection inside the light guide 500. Occurs because it exceeds the corner. That is, it means that light exits beyond a critical angle from either one of two surfaces that are not parallel to the light propagation direction. Conversely, light that has repeatedly undergone total reflection between two surfaces completely parallel to the propagation direction does not exceed the critical angle and does not emit light.
  • the characteristic figure with the leak light emission rate in is shown.
  • the leaked light output rate is a ratio of the leaked light in the light output direction to the entire incident light to the light guide 500.
  • FIG. 11A the angle formed by the side plane 521a of the wide portion 526 of the first leg 521 facing the second leg 522 and the longitudinal direction X is the protrusion angle ⁇ 2.
  • FIG. 11B shows the relationship between the protrusion angle ⁇ 2, the leakage light output rate at the light output surface 550, and the light guide efficiency to the main body of the light guide 500 when the protrusion angle ⁇ 2 is changed from 15 to 60 °. A characteristic diagram is shown.
  • the light guide efficiency is obtained by a calculation formula of “remaining light quantity at the end of the light guide body (the one end surface 511 and the other end surface 512) / the total luminous flux emitted from the LEDs 610 and 611”.
  • the leaked light output rate decreases most in the range of 25 ° ⁇ ⁇ 2 ⁇ 35 ° (the light guide efficiency increases most), and the leak light output rate increases as the distance from the range increases (the light guide efficiency).
  • the second leg portion 522 as well.
  • FIG. 12B shows the protrusion length L when the protrusion length L is changed from ⁇ 2.5 to 7.5 (mm), the leaked light emission rate on the light output surface 550, and the main body of the light guide 500.
  • the characteristic view which shows the relationship with the light guide efficiency of is shown. According to FIG.
  • FIG. 13A the angle formed between the side surface 541a of the convex portion 541 and the longitudinal direction X is the inclination angle ⁇ 3.
  • FIG. 13B shows the relationship between the inclination angle ⁇ 3, the leakage light output rate at the light output surface 550, and the light guide efficiency to the main body of the light guide 500 when the protrusion angle ⁇ 3 is changed from 10 to 45 °.
  • a characteristic diagram is shown. According to FIG.
  • FIG. 14A when the intersection line 541c (FIG. 6) of the side surfaces 541a and 541b of the convex portion 541 is called the top line of the convex portion 541, the top line 541c protrudes from the main body of the light guide 500.
  • the position where there is no h is 0 (mm).
  • FIG. 14B shows the top line movement amount h when the top line movement amount h is changed from 1 to 7 (mm), the leaked light emission rate at the light exit surface 550, and the light guide to the main body of the light guide 500.
  • FIG. 15 is a schematic plan view of the traveling direction of light when using the extension angle ⁇ 1, the protrusion angle ⁇ 2, the protrusion length L, the inclination angle ⁇ 3, and the top line movement amount h described above, and FIG. Shown in FIG. 15 shows the traveling direction of light around the light incident portion 520 in FIG. 14A.
  • light enters the light guide 500 from the light entrance 520 through the connection portion 528 without leaking from the light entrance 520 and the light guide 500 in FIG. 14A.
  • FIG. 16 shows the relationship between the position in the longitudinal direction of the light guide 500 in FIG. 14A and the luminance distribution of the light guide 500, specifically, the intermediate portion in the longitudinal direction X of the connection portion 528 as a reference point.
  • the illuminating device 1 of this embodiment the illuminating device such as uneven brightness and glare due to dark spots and hot spots, which are likely to occur when the light incident portion 520 is provided in the middle of the longitudinal direction X of the light guide 500. The cause of the performance degradation in the appearance of has been eliminated.
  • the inventors of the present application have found that this is possible, and has made it possible to provide an illumination device 1 that is characterized in that light is incident from a light incident portion 520 in the middle of the long light guide 500.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)

Abstract

L'invention concerne un système d'éclairage qui permet à un corps de guidage de lumière long d'émettre une lumière de manière uniforme, et qui permet de réduire la longueur des faisceaux de câbles servant à alimenter des sources de lumière. En outre, dans le système d'éclairage, l'augmentation du nombre requis de substrats à DEL est supprimée, éliminant ainsi des déficiences de coût, de traitement et de conception. Ce système d'éclairage de véhicule comprend un corps de guidage de lumière long ayant une paire de surfaces d'extrémité. Sur une surface latérale d'une partie du corps de guidage de lumière entre la paire de surfaces d'extrémité, une unité d'entrée de lumière ayant le plan d'incidence est formée d'un seul tenant avec le corps de guidage de lumière. Des sources de lumière sont disposées de façon à faire face au plan d'incidence.
PCT/JP2016/085048 2015-12-24 2016-11-25 Système d'éclairage de véhicule WO2017110366A1 (fr)

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JP2008210758A (ja) * 2007-02-28 2008-09-11 Rohm Co Ltd 面状光源装置
JP2012096564A (ja) * 2010-10-29 2012-05-24 Hayashi Telempu Co Ltd 自動車用照明装置
JP2013222540A (ja) * 2012-04-13 2013-10-28 Koito Mfg Co Ltd 車両用灯具

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CN102933891B (zh) * 2010-03-17 2015-07-15 三菱丽阳株式会社 面光源装置、面光源装置用导光体及其制造方法
JP5740560B2 (ja) * 2012-12-11 2015-06-24 パナソニックＩｐマネジメント株式会社 照明装置

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JP2008210758A (ja) * 2007-02-28 2008-09-11 Rohm Co Ltd 面状光源装置
JP2012096564A (ja) * 2010-10-29 2012-05-24 Hayashi Telempu Co Ltd 自動車用照明装置
JP2013222540A (ja) * 2012-04-13 2013-10-28 Koito Mfg Co Ltd 車両用灯具

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