Abstract: A wavelength conversion device includes a substrate, a reflection layer, a wavelength conversion layer, and a first optical layer. The wavelength conversion device has a central axis. The reflection layer is disposed on an upper surface of the substrate. The central axis is perpendicular to the upper surface. The wavelength conversion layer is disposed on the reflection layer and around the central axis, has a complete or partial annular shape, and includes a first region and two second regions. The first region is located between the second regions. The first optical layer is disposed on a surface of the wavelength conversion layer and corresponds to the first region. In an axial direction, an orthographic projection of the first optical layer on the upper surface is not overlapped with an orthographic projection of the second regions on the upper surface. The first optical layer includes first diffusing particles.

Abstract: A wavelength conversion device and a light source system, including: a substrate; a first light-emitting portion disposed on the substrate, wherein the first light-emitting portion includes a first light guide area and a counterweight area provided on the same layer as the first light guide area, the first light guide area being used for guiding first light, and the counterweight area being used for making the weight distribution of the wavelength conversion device substantially uniform; and a second light-emitting portion provided on the substrate on the same side as the first light-emitting portion, the second light-emitting portion including a conversion area, and the conversion area being used to convert at least a part of excitation light into excited light for emission when the excitation light is received.

Abstract: A wheel provided by the disclosure includes a substrate, a driving component, a clamping element and a balance component. The driving component is connected to the substrate, and is configured to drive the substrate to rotate about the axis of the driving component as the central axis. The clamping element is arranged on the substrate along the axis, and the clamping element includes a plurality of protruding structures. The balance component includes a balance substance and an adhesive. The balance substance is arranged on the protruding structure, and the adhesive covers the balance substance and the protruding structure to fix the balance component on the clamping element. The wheel and projection device provided by the disclosure have better structural reliability and heat dissipation efficiency.

Abstract: The invention provides a light generating system (1000) comprising a light generating device (100), a luminescent material layer (200), and optics (400), wherein: (I) the light generating device (100) is configured to generate polarized laser radiation (101); (II) the luminescent material layer (200) comprises a luminescent material (210) configured in a light-receiving relationship with the light generating device (100) and configured to convert at least part of the polarized laser radiation (101) into luminescent material radiation (211); (III) the light generating system (1000) is configured to generate in an operational mode system light (1001) at least comprising the luminescent material radiation (211); (IV) the optics (400) comprise first optics (410) and second optics (420); wherein the first optics (410) are configured to change the polarization of the polarized laser radiation (101), and wherein the second optics (420) have one or more of (i) a polarization dependent transmission and (ii) a polariza

Abstract: An optical system of the disclosure includes: a fluorescent unit that includes a phosphor region excited by a first color light beam to output fluorescent light including at least one color light beam, and outputs the first color light beam in a first period and outputs the fluorescent light in a second period; one or two light valves illuminated by at least one of the first color light beam or the fluorescent light; and a region division element including first and second regions and disposed on an optical path between the fluorescent unit and the one or two light valves, the first region outputting the first color light beam and the fluorescent light from the fluorescent unit to be able to reach the one or two light valves, the second region outputting the fluorescent light from the fluorescent unit to be able to reach the one or two light valves.

Abstract: A light source system and a projection apparatus are provided. The light source system includes a first light source, a second light source including a second blue laser light source, a wavelength conversion element configured to convert second blue laser light into excited light, and a controller. The first light source includes a first blue laser light source configured to emit first blue laser light, a red laser light source configured to emit red laser light, and a green laser light source configured to emit green laser light. The controller controls the first and second blue laser light sources, the red laser light source, and the green laser light source to combine the first blue laser light, the red laser light, and the green laser light to form light source light, or to combine the first blue laser light and the excited light to form the light source light.

Abstract: An illumination system, configured to provide an illumination beam, is provided. The illumination system includes a first excitation light source, a wavelength conversion element, and a controller. The first excitation light source is configured to provide a first excitation beam. The wavelength conversion element is located on a transmission path of the first excitation beam. The wavelength conversion element includes multiple wavelength conversion regions and multiple non-wavelength conversion regions. The controller controls whether the first excitation light source emits light. During a first time interval, the controller turns off the first excitation light source. During a second time interval, the controller controls the first excitation light source to emit light. The first excitation beam is transmitted to one of the wavelength conversion regions to form a converted beam. The illumination beam includes the converted beam. Another illumination system and multiple projection devices are also provided.

Abstract: A light source system includes a first light emitter configured to emit a first light with a first color band in a first time interval of a time period, a second light emitter configured to emit a second light with a second color band in a second time interval of the time period rather than in the rest of the time period other than the second time interval, and a light guide disposed downstream from the first light emitter and the second light emitter. The first time interval and the second time interval overlap in an overlapping time interval. The first light emitter and the second light emitter synchronously emit the first light and the second light in the overlapping time interval to form a combined light beam in the light guide. The light with the second color band is dominant of the combined light beam.

Abstract: A nano-structure layer is disclosed. The nano-structure layer includes an array of nano-structure material configured to receive a first light beam at a first angle of incidence and to emit the first light beam at a second angle greater than the first angle, the nano-structure material each having a largest dimension of less than 1000 nm.

Abstract: A light source is provided that includes a laser operable to emit laser light at a wavelength in a range from 460 nanometers to 470 nanometers and a converter assembly arranged so as to absorb the laser light emitted by the laser and to emit photoluminescent light produced by the laser light and having a longer wavelength than the laser light. The converter assembly has a converter element with a ceramic doped with Eu3+ such that under irradiation of the laser light the converter assembly emits photoluminescent light in the red spectral range.

Abstract: A construction component forms at least a part of a structure that faces a target space. The construction component has a first function, a second function, and a third function. The first function is a function of emitting illumination light toward the target space. The second function is a function of allowing incident light to enter the construction component. The incident light is emitted from a light source disposed out of a projection area, viewed from the target space, of the construction component and is incident on the construction component via a light transmission member. The third function is a function of converting the incident light into the illumination light.

Abstract: A light-source device includes an excitation light source; an optical element having a reflecting surface to reflect first colored light emitted from the excitation light source; and a wavelength conversion unit including a waveform conversion member configured to convert at least a portion of the first colored light reflected by the optical element and incident on the wavelength conversion unit, into second colored light having a wavelength different from a wavelength of the first colored light and emit the second colored light. A point P does not intersect with a light flux Q where the point P is a center of the first colored light on the reflecting surface of the optical element and the light flux Q is a light flux of the first colored light emitted from the wavelength conversion unit.

Abstract: An electronic lighting device and a method for manufacturing the same are disclosed. The electronic lighting device includes an outer shell with a first opening at a top surface and a core contained within the outer shell. The core includes a left semicircular structure and a right semicircular structure arranged to form a circular shape that is aligned with the first opening at the top surface of the outer shell. The device includes a flame component positioned partially in the internal cavity. The device also includes a light emitting element disposed at least partially in a lighting element installation cradle on a sidewall of the core to hold the light emitting element at a non-zero angle with respect to a longitudinal axis of the electronic lighting device to allow illumination of the flame component. The device further includes a control circuit to control an operation of the lighting emitting element.

Abstract: A colour wheel assembly, a light source system provided with the same, and a projection device are provided, a boron nitride coating being arranged on the side of the colour wheel assembly corresponding to a red fluorescent area and the other side being provided with glass powder, and the two sides of a non-red fluorescent area both being provided with a glass powder coating layer. By means of arranging boron nitride material in a position corresponding to a red fluorescent area, as the boron nitride material has good thermal conductivity relative to the glass powder and the crystal structure of the boron nitride is a layered structure, having the effect of effectively blocking light and thereby further reducing the excitation light incident on the red fluorescent powder, attenuation of the red fluorescence under the direct excitation of strong excitation light can be effectively prevented.

Abstract: A light emitting device includes a substrate, a plurality of first light emitting elements mounted on the substrate, including first LED dies, and emitting light having a first wavelength, and a light guide layer arranged so as to cover the plurality of first light emitting elements, and guiding the light from the plurality of first light emitting elements, wherein when LG1 is a distance between the first LED dies, and ?c is a critical angle of the light emitted from the light guide layer to the air, and a thickness T between the upper surfaces of the first light emitting elements and the upper surface of the light guide layer is equal to or longer than T1 indicated by T1=LG1/(2tan ?c).

Abstract: A light source module including first and second light sources, first and second wavelength conversion units, first and second light-splitting units is provided. The first light source emits a first light having a first wavelength. The first wavelength conversion unit converts at least one portion of the first light into a first converted light having a second wavelength. The second light-splitting unit allows the light having the first wavelength to travel through and reflects the light having the second wavelength. The second light source emits a second light having the first wavelength. The second wavelength conversion unit converts at least one portion of the second light into a second converted light having the second wavelength. The first light-splitting unit disposed between the first and the second wavelength conversion units reflects the light having the first wavelength and allow the light having the second wavelength to travel through.

Abstract: A light emitting device includes a substrate, a plurality of light sources disposed on the substrate, and a plurality of light reflecting members disposed on the substrate. The light reflecting members respectively include wall parts each surrounding each of the light sources individually or two or more of the light sources in groups. Two adjacent ones of the light reflecting members are joined to each other such that outer surfaces of the wall parts of the two adjacent ones of the light reflecting members are bonded to each other via an adhesive agent.

Abstract: A color filter unit having improved optical efficiency and color reproduction and a display apparatus including the color filter unit are provided. The display apparatus includes a first pixel, a second pixel, and a third pixel on a first substrate, the first pixel, the second pixel, and the third pixel are configured to emit light of different colors from one another, wherein each of the first pixel and the second pixel includes a display element, a light scattering layer corresponding to the display element, the light scattering layer comprising first scattering particles and first quantum dots, and a color conversion layer on the light scattering layer, the color conversion layer including second scattering particles and second quantum dots configured to convert incident light into light of a set color.

Abstract: The laser device includes a substrate, a laser element disposed on the substrate for emitting a laser light ray, a light guide member disposed on the substrate, and a wavelength conversion layer. The light guide member is light-transmissible and thermally conductive, and has at least one reflection surface for reflecting the laser light ray from the laser element so as to change travelling direction of the laser light ray. The wavelength conversion layer converts wavelength of the laser light ray from the light guide member to result in a laser beam, and contacts the light guide member so that heat from the wavelength conversion layer is transferred to the substrate through the light guide member.

Abstract: Provided is a light emitting device, including a first light emitting element having a light emission peak wavelength within a range of 400 nm or more and 490 nm or less, a second light emitting element having a different light emission peak wavelength from the first light emitting element within a range of 400 nm or more and 490 nm or less, a first fluorescent material that is excited by at least one of the first light emitting element and the second light emitting element and emits light having a light emission peak wavelength within a range of 500 nm or more and 540 nm or less, and a second fluorescent material, wherein the first fluorescent material is a Ce-activated aluminate fluorescent material containing Lu, Al, and Ga, and optionally at least one element selected from rare earth elements other than Lu.

Abstract: The invention discloses color conversion film which, upon ex-citation by blue light, emits green and red light. The films comprise at least one red light emitting layer, one green light emitting layer and sandwiched in between at least one separation layer.

Abstract: A display apparatus includes: a first to third light-emitting element, each including an emission layer to emit light in a first direction, an encapsulation layer covering the first to third light-emitting elements; a first light-shielding layer arranged on the encapsulation layer, the first light-shielding layer including a first set of opening portions respectively corresponding to the first to third light-emitting elements; a metal layer arranged on an inner surface defining the first set of opening portions, wherein a width of the metal layer in a second direction normal (or perpendicular) to the first direction gradually decreases along the first direction; and a first color conversion layer; a second color conversion layer; and a light-transmitting layer, the first color conversion layer, the second color conversion layer, and a light-transmitting layer respectively corresponding to the first to third light-emitting elements.

Abstract: A method of manufacturing a light emitting device includes: bonding a light emitting element and a light transmissive member by a surface activated bonding method, which includes: activating a first bonding surface of the light emitting element to which the light transmissive member is to be bonded, by irradiating at least the first bonding surface with an ion beam, activating a second bonding surface of the light transmissive member to which the light emitting element is to be bonded, by irradiating at least the second bonding surface with an ion beam, and joining the light emitting element and the light transmissive member by bringing the activated first bonding surface and the activated second bonding surface into contact.

Abstract: A lighting fixture appears as a skylight and is referred to as a skylight fixture. First and second light engines of the fixture provide different color points, peak light intensity angles, far-field light distribution characteristics, and/or circadian stimulus values. A skylight fixture may include a sky-resembling assembly and a plurality of sun-resembling assemblies, with dedicated optical assemblies and/or light sources. A lighting fixture may include multiple waveguides that different extraction feature patterns and/or may be sequentially arranged.

Abstract: A device including a phosphor layer having a plurality of holes or pockets arranged within the phosphor layer to reduce lateral light transmission. The phosphor layer can be sized and positioned to extend over a plurality of LED emitter pixels.

Abstract: A light source device includes a light source, a plurality of wavelength conversion units, and a plurality of optical systems. The plurality of wavelength conversion units each includes a wavelength conversion region configured to receive light emitted from the light source and emit light with a wavelength different from a wavelength of the received light. The plurality of optical systems are configured to form images of wavelength conversion regions of the plurality of wavelength conversion units. The light source is configured to irradiate the wavelength conversion units with light at a same timing. The plurality of optical systems are configured to cause the images of the wavelength conversion regions of the plurality of wavelength conversion units to be adjacent to or superimposed on each other.

Abstract: This application relates to the field of lighting, and discloses an LED filament including: at least one LED section, each LED section including at least two LED chips, adjacent LED chips being electrically connected to each other; electrodes, electrically connected to the LED section; and a light conversion layer, wrapping the LED section and parts of the electrodes, and including a top layer and a carrying layer, the carrying layer including a base layer and a transparent layer, the base layer including an upper surface and a lower surface opposite to each other, the upper surface of the base layer being in contact with a part of the top layer, and a part of the lower surface of the base layer being in contact with the transparent layer. This application has the characteristics of uniform light emission and good heat dissipation effect.

Abstract: The present invention relates to a red phosphor, a preparation method thereof and a light-emitting device prepared therefrom. A particle of the red phosphor consists of a phosphor inner core having a chemical formula of Ax1Gez1F6:y1Mn4+ and an outer shell having a chemical formula of Bx2Mz2F6:y2Mn4+, wherein 1.596?x1?2.2, 1.6?x2?2.2, 0.001?y1?0.2, 0?y2?0.2, 0.9?z1?1.1, and 0.9?z2?1.1; A and B are independently selected from alkali metal elements; and M is Si, or Si and Ge. The red phosphor provided by the present invention has high luminous efficiency and stability. Moreover, the phosphor alone or in combination with other luminescent materials can be used for preparing a light-emitting device with high performance.

Abstract: A light emitting device includes a light emitting element having a dominant wavelength in a range of 400 nm or more and 500 nm or less, and a wavelength conversion member that is arranged on a light emitting side of the light emitting element and includes a rare earth aluminate fluorescent material having a composition represented by the following formula (I), wherein the light emitting device emits light having a dominant wavelength in a range of 475 nm or more and 500 nm or less, and wherein the light emitting device emits light having an S/P ratio of 6.5 or less derived from the formula (1), which is the ratio of a luminous flux in scotopic vision relative to a luminous flux in photopic vision: (Lu1-p-nLnpCen)3(Al1-mGam)5kO12??(I) wherein in the formula (I), Ln represents at least one rare earth element selected from the group consisting of Y, La, Gd, and Tb, and the parameters k, m, n, and p satisfy 0.95?k?1.05, 0.05?m?0.70, 0.002?n?0.050, and 0?p?0.30, respectively.

Abstract: A reflector includes a reflector body that reflects light emitted from a light source and a phosphor layer that is provided on the reflector body and includes a phosphor excited by the light emitted from the light source.

Abstract: A light source apparatus includes a light source configured to emit first light, a wavelength converter configured to emit second light having a wavelength different from that of the first light, a first optical system, and a second optical system configured to transmit the second light. The second optical system includes a reflector configured to reflect the first light to the wavelength converter. The first optical system condenses the first light from the light source on the wavelength converter, and guides the first light to the reflector.

Abstract: A projection apparatus includes an illumination system configured to output an illumination beam, a light valve and a projection lens. The illumination system includes a laser light source configured to emit a laser beam and a wavelength conversion element. A first region of the wavelength conversion element includes at least one first and second optical function region. In a first sub-time interval, the first optical functional region guides the laser beam to a first position with a first optical path, wherein the light valve is located at the first position. In the second sub-time interval, the second optical functional region guides the laser beam to a second position with a second optical path, wherein the second position is different from the first position. The projection apparatus of the present invention has good image quality.

Abstract: Optical glass, a preparation method thereof, a backlight module and a display module. The optical glass comprises a glass substrate and optical masterbatches, which are dispersed in the glass substrate, each optical masterbatch comprises a quantum dot fluorescent agent inner core and an encapsulation shell which encloses the quantum dot fluorescent agent inner core. A quantum dot fluorescent agent is protected by the encapsulation shell and the luminous efficiency is high; when the optical glass is applied to a display module, the color gamut may be improved; moreover, the glass is capable of preventing against the invasion of water vapor, even the quantum dot fluorescent agent at an edge of the glass rarely fails, and an edge failure size is basically avoided; meanwhile, the expansion coefficient is small, and an expansion space reserved during assembly is extremely small.

Abstract: A luminescent light emitting device includes a base, a luminescent material layer provided on the base, a heat dissipating rib provided on an outer circumferential side of the luminescent material layer in such a manner as to rise erect from the base, and a collective lens fixed to the heat dissipating rib to seal in the luminescent material layer.

Abstract: A fluorescent color wheel includes a substrate, a phosphor layer, and a fan blade structure. The substrate has a front surface, a rear surface opposite to the front surface, and a plurality of through holes communicating the front surface and the rear surface. The phosphor layer is disposed on the front surface. The fan blade structure includes a heat-dissipating plate and a plurality of first fan blades. The heat-dissipating plate has a first surface attached to the rear surface of the substrate. The first fan blades are disposed on the first surface and respectively pass through the through holes to protrude out from the front surface of the substrate.

Abstract: A light source module includes a light source, a dichroic unit, a color wheel and a wavelength conversion unit. The light source is configured to emit a light. The dichroic unit is opposite to the light source and configured to reflect a portion of the light as a first illumination light in a first direction and reflect a portion of the light as a second illumination light in a second direction inverse to the first direction. The color wheel is opposite to the dichroic unit and configured to at least receive the first illumination light. The color wheel has a blue filter area, a green filter area and a red filter area. The wavelength conversion unit is opposite to the color wheel and the dichroic unit and configured to at least receive the second illumination light and provide a converted light to the color wheel.

Abstract: A lighting device is provided that includes light emitting unit that emits primary light and a light conversion element that is illuminated with the primary light and emits secondary light of another wavelength. The light conversion element has a front side defining a primary light receiving surface that received the primary light and a secondary light emitting surface that emits the secondary light. The light conversion element has a variable thickness at the primary light receiving surface and/or in the secondary light emitting surface.

Abstract: Provided is an optical member. The optical member includes a color filter member including quantum dots and a low-refractive index layer below the color filter member and including a first hollow particle and a second hollow particle. The first hollow particle may have a particle size different from a particle size of the second hollow particle.

Abstract: An optoelectronic component is provided that includes a radiation-emitting semiconductor chip, which emits electromagnetic radiation from a radiation exit surface during operation, a carrier comprising at least two first contact points, and a cover including at least two second contact points, wherein the at least two first contact points and the at least two second contact points are electrically conductively and/or thermally conductively connected to one another by a first plurality of nanowires and a second plurality of nanowires, and the nanowires provide a mechanically stable connection between the carrier and the cover. In addition, a method for producing an optoelectronic component is provided.

Abstract: A method for producing a fluoride fluorescent material comprises: preparing fluoride particles having a composition containing at least one element or ion A selected from the group consisting of alkaline metal elements and NH4+, at least one element M selected from the group consisting of Group-4 elements and Group-14 elements, Mn4+, and F, in which a molar ratio of A in 1 mol of the composition is 2, a total molar ratio of M and Mn4+ is 1, a molar ratio of Mn4+ is in a range of more than 0 and less than 0.2, and a molar ratio of F is 6; subjecting the fluoride particles to a first heat treatment at a temperature of 500° C. or more in an inert gas atmosphere; washing the first heat-treated fluoride particles with a washing liquid; and bringing the washed fluoride particles into contact with a fluorine-containing substance and subjecting the resulting fluoride particles to a second heat treatment at a temperature of 400° C. or more.

Abstract: Provided is a method for producing a ?-sialon fluorescent material, comprising preparing a composition containing a silicon nitride that contains aluminium, oxygen, and europium; heat-treating the composition at a temperature in a range of 1300° C. or more and 1600° C. or less to obtain a heat-treated product; subjecting the heat-treated product to a temperature-decrease of from the heat treatment temperature to 1000° C. as a first temperature-decrease step; and subjecting the heat-treated product to a temperature-decrease of from 1000° C. to 400° C. as a second temperature-decrease step. The first temperature-decrease step has a temperature-decrease rate in a range of 1.5° C./min or more and 200° C./min or less, and the second temperature-decrease step has a temperature-decrease rate in a range of 1° C./min or more and 200° C./min or less.

Abstract: An illuminator includes a light emitting apparatus which outputs first light belonging to a first wavelength band, a wavelength converter which converts part of the first light into second light belonging to a second wavelength band and causes the second and remainder of the first light to exit, a first optical system with positive power and which the first light enters, an optical element which the remaining first light enters and which reflects either the first or second light and transmits the other, a second optical system with positive power and which the first from the optical element and second light from the converter enter, a third optical system with positive power and causes the first light from the second optical system to enter the converter, and a fourth optical system with positive power and which the second light from the second optical system enters.

Abstract: An optoelectronic component and a method for producing an optoelectronic component are disclosed. In an embodiment an optoelectronic component includes a semiconductor chip including a plurality of pixels, each pixel configured to emit electromagnetic primary radiation from a radiation exit surface and conversion layers located on at least a part of the radiation exit surfaces, wherein the conversion layers comprise a crosslinked matrix having a three-dimensional siloxane-based network and at least one phosphor embedded in the matrix, and wherein the conversion layers have a thickness of ?30 ?m.

Abstract: An LED filament and an LED light bulb applying the same are provided. The LED filament includes a at least one LED section, wherein the at least one LED section comprises at least two LED chips electrically connected to each other through a first wire, and at least two conductive electrodes, wherein each of the at least two conductive electrodes is electrically connected to corresponding one of the at least one LED section; and a light conversion layer, covering the at least one LED section and a portion of each of the at least two conductive electrodes, a portion of the first wire is exposed outside the light conversion layer.

Abstract: A wavelength conversion device includes a substrate, a reflective layer, a phosphor layer and a thermal conductive layer. The substrate has a surface. The reflective layer is disposed on the surface of the substrate. The phosphor layer is disposed on the reflective layer and has a conversion region configured to perform a wavelength conversion. The thermal conductive layer is disposed on the surface of the substrate and thermally directly connected to the conversion region for conducting a heat generated at the conversion region during the wavelength conversion. The thermal resistance of the reflective layer is high and causes heat in the conversion region to accumulate. By disposing the thermal conductive layer adjacent to a side of the phosphor layer, the thermal conductive layer is thermally directly connected to the conversion region, so that the heat generated at the conversion region during the wavelength conversion is efficiently dissipated.

Abstract: The purpose is to provide a wavelength conversion member, a method for manufacturing the wavelength conversion member, and a light-emitting device, which are capable of reducing the temperature rise of the wavelength conversion member and thus reducing the decrease in luminescence intensity with time and deformation and discoloration of constituent materials. A wavelength conversion member 10 includes a matrix 1 and phosphor particles 3 dispersed in the matrix 1, wherein the matrix 1 is formed of a porous oxide body 2 having an average pore diameter of 50 ?m or less.

Abstract: The present invention provides a quantum dot material structure, a liquid crystal display device, and an electronic device. The quantum dot material structure is applied in the liquid crystal display device. The quantum dot material structure includes a quantum dot core, a quantum dot shell, and a quantum dot ligand layer in order from an inside to an outside. The quantum dot core comprises a cadmium arsenide magic-size, and the quantum dot core is used to absorb green light of a predetermined wavelength. The quantum dot shell is used to protect the quantum dot core. The quantum dot ligand layer is used to promote a structural dispersion of the quantum dot material.

Abstract: A light emitting diode, LED, filament arrangement (100), comprising at least one LED filament (120) comprising an array of a plurality of light emitting diodes (140), LEDs. The LED filament comprises a substrate (150) on which the plurality of LEDs is arranged. The substrate surface comprises at least one of a multi-faceted surface structure (160), a lens structure (161), and a grating structure (162) and is configured to at least partially refract, at least partially reflect, and/or at least partially diffract the light emitted from the at least one LED filament during operation.

Abstract: A vehicular apparatus includes: a housing that is configured to be attached to a vehicle; and a first light source and a second light source that are provided in the housing to emit light having main wavelengths in mutually different wavelength ranges. The first light source emits light having a main wavelength in 490 nm-498 nm while the vehicle is being automatically driven.

Abstract: An illumination system providing an illumination light beam is provided. The excitation light beam passes beside a central region from a first side of the wavelength conversion wheel and then exits from a second side and is transmitted to the first mirror. The first mirror reflects the excitation light beam to the central region on the second side. A non-conversion reflection region of the wavelength conversion wheel reflects the excitation light beam, or a wavelength conversion reflection region of the wavelength conversion wheel converts the excitation light beam into a converted light beam and reflects the converted light beam. The excitation light beam or the converted light beam that is reflected is transmitted to the light homogenizing element. The light homogenizing element homogenizes the excitation light beam and the converted light beam to form the illumination light beam. A projection device is proposed, too.