Abstract: The invention provides a projection method and system. The method includes providing a first sensing group sensing a space and generating a first sensing result to determine whether a user is in an entering or exiting state relative to the space; providing a second sensing group sensing a first or second object in the space according to the first sensing result and generating a second sensing result; and generating a prompt information according to the second sensing result and displaying the prompt information. The system includes a first sensing group, a second sensing group, and a display device. The method and system of the invention sense the space according to the entering and exiting state of the user to effectively reduce the inspection steps of the user for the space, thereby effectively improving the safety of the space, and improving the operating convenience of the user of the space.

Abstract: The invention provides a wavelength conversion device and a projection device, where the wavelength conversion device includes a substrate, a wavelength conversion layer, and a light-transmitting layer. The wavelength conversion layer is disposed on the substrate and is made of a wavelength conversion material and a bonding material. The wavelength conversion layer has a refractive index of 1.55-1.70. The light-transmitting layer is disposed on the wavelength conversion layer and is made of the bonding material. The wavelength conversion device and the projection device provided by the invention have greater brightness and are less restricted by temperature during operation.

Abstract: An optical processing turntable, a wavelength conversion module, and a projection apparatus are provided. The optical processing turntable includes a substrate and a driver assembly. The substrate has a fixing hole and a first side and a second side opposite to each other. The driver assembly passes through the fixing hole to be disposed on the substrate to drive the substrate to rotate. The driver assembly has two locking surfaces, where the two locking surfaces are respectively located on the first side and the second side of the substrate. In the projection apparatus using the optical processing turntable provided by the invention, noise generated by structural vibration may be effectively reduced, and a prolonged service life is provided.

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 wavelength conversion module and a projection device are provided. The wavelength conversion module includes a substrate, a wavelength conversion layer, a first reflective layer, and a second reflective layer. The substrate includes a first region and a second region. The wavelength conversion layer is disposed on the substrate. The first reflective layer is disposed on the first region of the substrate and located between the first region of the substrate and the wavelength conversion layer. The second reflective layer is disposed on the second region of the substrate and located between the second region of the substrate and the wavelength conversion layer, and a distance from a top surface of the second reflective layer to the substrate is shorter than a distance from a top surface of the first reflective layer to the substrate. The projection device includes an illumination system including the wavelength conversion module.

Abstract: A wavelength conversion element includes a substrate and a wavelength conversion layer. The substrate has a bearing surface and a first positioning portion, and the first positioning portion is located on the bearing surface. The wavelength conversion layer is disposed on the bearing surface and has a second positioning portion corresponding to the first positioning portion, and the second positioning portion is adapted to engage with the first positioning portion. A projection apparatus having the wavelength conversion element is also provided. The disclosure is able to improve assemble accuracy and light conversion efficiency of the wavelength conversion element.

Abstract: A wavelength conversion element includes a substrate, an adhesion layer and a wavelength conversion material. The substrate has a bearing surface having an adhesion zone. The adhesion zone has a central portion and two edge portions respectively on two sides of the central portion. The adhesion layer is disposed on the adhesion zone and includes a first adhesive and a second adhesive. The first adhesive is disposed at the edge portions. The second adhesive is disposed at the central portion. Operating temperature of the first adhesive is lower than operating temperature of the second adhesive. Viscosity of the first adhesive is larger than viscosity of the second adhesive. The wavelength conversion material is fixed on the bearing surface by the first adhesive and the second adhesive. A projection apparatus having the wavelength conversion element is provided, and the durability of the wavelength conversion element and the projection apparatus is improved.

Abstract: A wavelength conversion device includes a heat dissipation substrate, a first reflection layer, a second reflection layer, and a wavelength conversion layer. The first reflection layer is disposed on the heat dissipation substrate. The second reflection layer is disposed on the first reflection layer. The wavelength conversion layer is disposed on the second reflection layer. The first reflection layer is located between the heat dissipation substrate and the second reflection layer, and the second reflection layer is located between the first reflection layer and the wavelength conversion layer. A reflectivity of the second reflection layer to a visible light is greater than a reflectivity of the first reflection layer to the visible light, and a thickness of the first reflection layer is greater than or equal to a thickness of the second reflection layer. A projection device having the wavelength conversion device is further provided.

Abstract: The invention relates to a wavelength conversion device and a manufacturing method thereof. The manufacturing method includes: mixing a fluorescent material, a binding material, and a solvent to form a mixed solution. The volume percentage concentration of the fluorescent material is about 50% to 80%, the volume percentage concentration of the binding material is 10% to 40%, and the volume percentage concentration of the solvent is 10% to 30%. The mixed solution is coated on the substrate. A heat treatment is performed on the mixed solution at a first temperature to form a wavelength conversion layer. The first temperature is higher than the boiling point of the solvent, and the wavelength conversion layer has a porosity of 10% to 30%. The wavelength conversion device manufactured by the manufacturing method of the invention has better toughness, and may provide stable optical quality and improve image brightness.

Abstract: A wavelength conversion element includes a substrate, a wavelength conversion layer, and a first inorganic interstitial layer. The wavelength conversion layer is disposed on the substrate. The wavelength conversion layer includes an inorganic adhesive and a wavelength conversion material, and the wavelength conversion material is mixed with the inorganic adhesive. The first inorganic interstitial layer is disposed between the wavelength conversion layer and the substrate. A projection device having the wavelength conversion element is further provided, and a manufacturing method of the wavelength conversion element is also provided. The wavelength conversion element manufactured by using the manufacturing method of the invention may improve conversion efficiency and thermal conductivity. The projection device of the invention may reduce the problem that the image brightness decreases.

Abstract: A wavelength conversion module, a method of forming the same and a projection apparatus are provided. The wavelength conversion module includes a substrate and a wavelength conversion layer. The substrate has a rough surface including two first regions and a second region located between the two first regions in a radial direction on the substrate. The wavelength conversion layer is located on the substrate and includes a wavelength conversion material, a bonding material and diffuse reflection particles. The wavelength conversion material is distributed in the bonding material. The diffuse reflection particles are located on the rough surface of the substrate and between the wavelength conversion material and the substrate. A second density of the diffuse reflection particles in the second region is greater than a first density of the same in one of the two first regions.

Abstract: A wavelength conversion module and a projection device are provided. The wavelength conversion module includes a substrate, a wavelength conversion layer and a thermal conductive adhesive layer. The wavelength conversion layer is located on the substrate. The thermal conductive adhesive layer is located between the wavelength conversion layer and the substrate. The thermal conductive adhesive layer includes a plurality of particles, the particles are distributed in the thermal conductive adhesive layer, and a particle concentration of the particles has a volume ratio greater than 0% and less than or equal to 80%.

Abstract: A rotation-type optical module includes a driving element, a turntable, an optical material, a balancing ring, and a first weight substance. The driving element includes a body and a rotating shaft body. The turntable is sleeved on the rotating shaft body and includes a first surface and a second surface. The optical material is disposed on the first surface of the turntable. The balancing ring is disposed between the driving element and the turntable and includes a third surface and a fourth surface, and the third surface and the second surface face each other. The balancing ring includes an outer retaining wall and at least one inner retaining wall which protrude from the fourth surface, and the first weight substance abuts between the outer retaining wall and the at least one inner retaining wall. A projection apparatus including the foregoing rotation-type optical module is further provided.

Abstract: A wavelength conversion module including a substrate, a reflective layer and a wavelength conversion layer is provided. The reflective layer is located on the substrate, wherein the reflective layer has two first reflective regions and a second reflective region. The second reflective region is located between the two first reflective regions in a radial direction, and the distance from the top of the reflective layer in the second reflective region to the substrate is smaller than the distance from the top of the reflective layer in each of the first reflective regions to the substrate. The wavelength conversion layer is located on the substrate, wherein the reflective layer is located between the substrate and the wavelength conversion layer. In addition, an illumination system, a projection apparatus, and a method of forming a wavelength conversion module are also proposed.

Abstract: A projector and a wavelength conversion device thereof are provided. The projector includes an illumination system that includes a light source device and a wavelength conversion device. The light source device is configured to provide an excitation beam. The wavelength conversion device is disposed on a transmission path of the excitation beam, and configured to convert the excitation beam into an illumination beam. The wavelength conversion device includes a substrate comprising a first surface, a second surface, and an axis center, a heat-conducting connection structure, a first reflective structure, and a wavelength conversion structure. The heat-conducting connection structure is located between the first surface and a first reflective structure, the first reflective structure is located between the heat-conducting connection structure and a wavelength conversion structure, and the wavelength conversion structure is located on the first reflective structure.

Abstract: A wavelength conversion element includes a substrate, a wavelength conversion layer, and a first inorganic interstitial layer. The wavelength conversion layer is disposed on the substrate. The wavelength conversion layer includes an inorganic adhesive and a wavelength conversion material, and the wavelength conversion material is mixed with the inorganic adhesive. The first inorganic interstitial layer is disposed between the wavelength conversion layer and the substrate. A projection device having the wavelength conversion element is further provided, and a manufacturing method of the wavelength conversion element is also provided. The wavelength conversion element manufactured by using the manufacturing method of the invention may improve conversion efficiency and thermal conductivity. The projection device of the invention may reduce the problem that the image brightness decreases.

Abstract: An illumination system configured to provide an illumination beam and including an excitation light source and a wavelength conversion module is provided. The excitation light source is configured to emit an excited beam. The wavelength conversion module is located on a transmission path of the excited beam, and has an annular wavelength conversion region. A first part of the excited beam is incident to the annular wavelength conversion region and converted into a first color light, and a second part of the excited beam is incident to the wavelength conversion module to form a second color light. A proportional value range of the second part of the excited beam and the excited beam ranges between 5% and 30%. Moreover, a projection apparatus is also provided. The illumination system of the invention has a simple structure and a concise optical path layout.

Abstract: An illumination system and a projection device are provided. The illumination system includes at least one laser light source providing at least one laser beam and a polarizing rotation module including a first axle, a first driving element, and a polarizing element. The first axle has a first revolution frequency. The polarizing element is disposed on a transmission path of the laser beam. The first driving element causes the polarizing element to rotate in a temporally sequenced manner. When the polarizing element is rotated, the laser beam is transmitted to the polarizing element at a specific frequency in a plurality of first time periods. The laser beam passing through the polarizing element has different polarizing states at different times. The specific frequency and the first revolution frequency of the first axle are not exactly divisible by each other. The invention can generate an image with uniform polarizing direction.

Abstract: An optical rotating device includes a substrate having a first surface and a second surface opposite to each other, a rotating shaft connected to the substrate, a driving element connected to the rotating shaft and driving it to rotate, a wavelength conversion layer disposed on the first surface to convert a first laser beam into a converted beam, and a polarizing element disposed on the second surface. The first laser beam and at least one second laser beam are respectively transmitted to the wavelength conversion layer and the polarizing element from opposite directions. The driving element drives the substrate, the wavelength conversion layer and the polarizing element to rotate along the rotating shaft as a rotation central axis. When the polarizing element is rotated, the polarizing element makes the second laser beam have different polarization states at different times. An illumination system and a projection device are also provided.

Abstract: A wavelength-converting wheel includes a motor, a turntable, a pressing ring, a first balance block and an adhesive layer. The motor has a rotating shaft. The turntable has an inner ring portion and an annular irradiation portion. The inner ring portion is sleeved on the rotating shaft. The annular irradiation portion is connected to an outer edge of the inner ring portion. The pressing ring is sleeved on the rotating shaft and pressed and abutted against the inner ring portion. The pressing ring has a first surface and a second surface. The second surface faces the inner ring portion. The first balance block is disposed on the first surface. The adhesive layer is adhered between the second surface of the pressing ring and the inner ring portion. A heat insulation structure is disposed in the projection direction where the first balance block is projected on the inner ring portion.