Abstract: A phosphor layer comprising a phosphor plate adhesively formed by a phosphor powder and an adhesive agent. The phosphor plate has a front side and a back side. The phosphor layer also has particles which are fixedly connected to the front and/or back side of the phosphor plate. Also provided in the present invention are a phosphor component, a corresponding light source, a projection system, and a method for manufacturing the phosphor layer. The phosphor component prevents adhesion between the phosphor plate and substrates thereof in high temperature conditions. A manufacturing method for the phosphor layer includes forming a phosphor plate by adhesively fixing a phosphor powder by an adhesive agent, the phosphor plate having a front side and a back side, and fixedly connecting at least one particle to the front and/or back side of the phosphor plate.
Abstract: A projector, comprising a housing (100) and a machine body provided inside the housing (100). A supporting piece (200) is connected to the housing (100) via a connection mechanism, and the supporting piece (200) can be converted between a first position and a second position under the limiting action of the connection mechanism. The supporting piece (200) is attached to a surface of the housing (100) at the first position, and a projection element is triggered at the same time to enable the machine body to be in a first working state. The supporting piece (200) departs from the surface of the housing (100) at the second position and drives the housing (100) to change a projection elevation thereof with respect to a horizontal plane, and the projection element is triggered at the same time to enable the machine body to be in a second working state, thereby controlling the working states of the machine body on the premise of free adjustment of a projection angle.
Abstract: Provided is a projection screen. The screen includes: a base layer; a cylindrical lens layer formed on a side of the base layer close to a viewer, a Fresnel structure formed on a side of the base layer facing away from the viewer, a reflective layer formed on a side of the Fresnel structure facing away from the base layer, including reflective particles and configured to scatter and reflect, in a solid angle range corresponding to a particle size of the reflective particles, incident light incident from the Fresnel structure, to form reflected light; and a light-absorbing layer formed on a side of the reflective layer facing away from the Fresnel structure. The cylindrical lens layer includes a plurality of cylindrical lenses each having an axis perpendicular to a horizontal direction, and scatters light from the Fresnel structure to increase a viewing angle in the horizontal direction.
November 3, 2017
Date of Patent:
July 21, 2020
Appotronics Corporation Limited
Fei Hu, Hongxiu Zhang, Zuqiang Guo, Yi Li
Abstract: An optical module a first adjusting screw rod, a first anti-loosening assembly, a second adjusting screw and a second anti-loosening assembly. The first adjusting screw rod is configured to adjust a position of a component in a first direction a, and the second adjusting screw is configured to adjust a position of a component in a second direction b. The first anti-loosening assembly is configured to lock the first adjusting screw rod after position adjustment of the first adjusting screw rod, and the second anti-loosening assembly is configured to lock the second adjusting screw after position adjustment of the second adjusting screw.
January 31, 2018
June 25, 2020
APPOTRONICS CORPORATION LIMITED
Jinjiang FU, Fei HU, Lunchun DU, Xinbo WEN, Yi LI
Abstract: Disclosed are a wavelength conversion device, a light-emitting device and a projection system, comprising a wavelength conversion layer having a first surface and a second surface opposite each other. The first surface receives an excitation light. The wavelength conversion layer absorbs the excitation to produce a converted light and emits the converted light or the mixture of the converted light and the excitation light from the first surface and the second surface. A scattering reflective substrate is stacked with the wavelength conversion layer and includes a white porous ceramic or a white scattering material for scattering the incident light. The scattering reflective substrate includes a third surface facing the second surface and scatters at least a part of the incident light on the third surface and then emits all the light from the third surface to the second surface.
Abstract: Disclosed are a color wheel device and a projector, wherein the color wheel device comprises: a color wheel chamber used for accommodating a color wheel module and provided with an air inlet and an air outlet; a heat exchanger having a heat-exchange core, the heat-exchange core being provided with a first channel for air in the color wheel chamber passing, the air outlet of the color wheel chamber being communicated with a heat-exchange inlet of the first channel, and a heat-exchange outlet of the first channel being communicated with the air inlet of the color wheel chamber to form a closed circulating air duct, wherein the first channel has multiple layers spaced apart from one another, and the space between two adjacent layers of the first channel forms a second channel for outside air passing; and an air propulsion device used for accelerating air flow.
Abstract: Provided are a light-reflecting microstructure, a projection screen and a projection system. The light-reflecting microstructure includes a transparent structure, the transparent structure including a light incident surface, a light-reflecting surface and a light-absorption surface connecting the light incident surface and the light-reflecting surface; a light-absorption structure located on the light-absorption surface; and a reflection layer located on the light-reflecting surface. The transparent structure is configured to refract projected light incident on the light incident surface at a preset angle to the reflection layer, and refract stray light incident on the light incident surface at another angle to the light-absorption structure. The reflection layer is configured to reflect the projected light in such a manner that the projected light is emitted at a certain angle from the light incident surface after being refracted twice through the transparent structure.
Abstract: The present disclosure provides a projection system and a control method thereof, comprising: a light source system, configured to sequentially generate primary light of three colors; a light modulation system comprising at least one light modulator configured to module the primary light; and a control system, configured to: divide time duration of each primary light in each source image frame into a plurality of modulation periods according to the number of gray scales, sequentially arrange the modulation periods, wherein at least two modulation periods of at least one primary light are arranged with an interval, and control the light source system to generate the primary light of the corresponding color in each modulation period according to a sequence of the modulation periods, and control the at least one light modulator to modulate the primary light of the corresponding color.
Abstract: A preparation method for a ceramic composite material, a ceramic composite material, and a wavelength converter. The preparation method comprises: preparing an aluminium salt solution and a fluorescent powder; dispersing the fluorescent powder into a buffer solution having a pH 4.5-5.5 to obtain a suspension; titrating the suspension with the aluminium salt solution to obtain a fluorescent powder coated with Al2O3 hydrate film; calcining the fluorescent powder coated with Al2O3 hydrate film to obtain a Al2O3-coated fluorescent powder; mixing aluminium oxide powder with a particle size of 0.1 ?m-1 ?m and aluminium oxide powder with a particle size of 1 ?m-10 ?m to obtain mixed aluminium oxide powder; mixing the Al2O3-coated fluorescent powder and the mixed aluminium oxide powder to obtain mixed powder, the Al2O3-coated fluorescent powder being present in 40%-90% by weight of the mixed powder; and pre-pressing and sintering the mixed powder to obtain the ceramic composite material.
Abstract: A projection system has a light source, a spatial light modulator, a light recycling system, and a lens assembly. The light source emits source light toward the spatial light modulator. The spatial light modulator modulates, according to an image signal, light incident on the spatial light modulator, so as to form projection light and non-projection light. The light recycling system receives at least a portion of the non-projection light, and guides the at least a portion of the non-projection light toward the spatial light modulator. The lens assembly receives and emits the projection light to form a projection image. The projection system of the present disclosure enables efficient use of non-projection light.
Abstract: A light source system includes a first light source emitting first laser; a wavelength conversion device; a driver device driving the wavelength conversion device to move in such a manner that regions of the wavelength conversion device sequentially and periodically receive the first laser; a second light source emitting supplementary light consistent in color with light emitted by one primary color light region; a control device controlling on and off of the second light source, the control device controlling the second light source to be on in at least two of: every time period during which a primary color light region of a same color is receiving the first laser, every time period during which the mixed color light region is receiving the first laser, and some time periods during which a primary color light region of a different color is receiving the first laser.
Abstract: Disclosed are a light source and a display system. The light source comprises at least one original light emitting device group (1) and at least one supplementary light emitting device group (2). The original light emitting device group (1) comprises at least two LED (11, 12, 13) and a wavelength light combining device (14, 15), wherein the energy of the overlapped spectrum in the normalized spectrum of the two LED is smaller than 50% of the smaller energy of the two, and the wavelength light combining device combines the light output from all the LED in the original light emitting device group (1) in a wavelength light combining way. The supplementary light emitting device group (2) comprises at least one LED (21). The energy of the overlapped spectrum in the normalized spectrum of any LED of the supplementary light emitting device group (2) and at least one LED of the original light emitting device group (1) is larger than or equal to 10% of the smaller energy of the two.
Abstract: A light source system including: a light source device emitting excitation light; an light output device receiving the excitation light and converting it into converted light, wherein the light output device includes at least two different wavelength conversion materials, the converted light of at least one wavelength conversion material being a multi-color light; a light splitting and combining device splitting the multi-color light into a first and a second color light propagating respectively along a first and a second optical channel, wherein the first and second color lights have different wave spectrum coverage ranges; and a first and a second light modulation device respectively modulating the light propagating over the first and second optical channels, wherein the light of three primary colours can be allocated to two DMDs for processing. This results in improved colour gamut of the light source and the light efficiency and reliability of the system.
Abstract: A color wheel includes a phosphor wheel, a color correction wheel, a rotation shaft, and a metal piece fixed on the rotation shaft, and the phosphor wheel and the color correction wheel are fixed together with the metal piece, such that they both contact the metal piece and heat generated by the phosphor wheel can be quickly transmitted to the metal piece and the color correction wheel and emitted into the air to cool the phosphor wheel.
Abstract: Disclosed are a light source system and a laser light source (300). The laser light source includes two groups of laser groups (20a, 20b), wherein at least one group of laser groups includes at least two lasers (21a, 21b, 21c, 21d), and the light beams (L1) generated by the two groups of laser groups are in the same direction and parallel to each other. The first projections of the two groups of laser groups on the cross section of the light beams formed by the respective emergent light rays thereof are partially overlapped with the second projections in a first direction, which first direction is the connection direction of at least two laser centres of a group of laser groups. The laser light source has the effects of being able to effectively increase the light power density and at the same time reduce the volume of the light source.
Abstract: Disclosed are a housing and a projection device comprising the housing. The housing comprises a case body, the case body comprising a first substrate, a second substrate and an annular connection plate, wherein the first substrate and the second substrate are arranged oppositely, the annular connection plate is disposed between the first substrate and the second substrate, the second substrate comprises a lens placement region in which a lens of the projection device is to be arranged, and a region, corresponding to the lens, of the annular connection plate is an opening region. The housing further comprises a knob lens cap arranged at the lens placement region, wherein the knob lens cap comprises a knob portion movably connected to the case body and extending out of the case body; and the knob portion drives the knob lens cap to rotate and move so as to shelter or expose the lens.
Abstract: A projection system includes a light source system that has a first light source for emitting first light, and a rotating color wheel that has at least a first fluorescent color band to absorb the first light and generate second light, and a second fluorescent color band to absorb the first light and generate compensation light. A light splitting device sequentially splits the first and second lights into light travelling along first and second light paths respectively. A first light modulation device modulates the light travelling along the first light path, and a second light modulation device for modulating the light travelling along the second light path. The first light is a primary light, the second light is a wide-spectrum light comprising at least two kinds of primary light, and a combined light of the first light and the second light comprises light of three primary colors.
Abstract: A projection system, a light source system and a light source assembly. The light source system includes an excitation light source, a wavelength conversion device, a filter device, a drive device and a first optical assembly. The wavelength conversion device includes at least one wavelength conversion region; the filter device is fixed relative to the wavelength conversion device and includes at least one first filter region. The drive device drives the wavelength conversion device and the filter device, so that the wavelength conversion region and the first filter region synchronously move, and the wavelength conversion region is periodically disposed on a propagation path of excitation light, to wavelength-convert the excitation light into the converted light. The first optical assembly guides the converted light into the first filter region; and the first filter region filters the converted light to improve its color purity.
Abstract: Disclosed are a wavelength conversion device and a light emitting device. The wavelength conversion device includes a wavelength conversion layer used for absorbing excitation light and generating converted light; a box having a first area used for transmitting the excitation light to the wavelength conversion layer and a second area used for transmitting the converted light, and further including an air outlet and an air inlet; a conduit, disposed outside the box and used for connecting the air inlet and the air outlet, so as to seal with the box the wavelength conversion layer in the box; a heat exchanger, used for decreasing a gas temperature in the conduit; and a gas circulation device, disposed in sealed space encircled by the box and the conduit, and used for driving exchange between gas in the box and gas in the conduit. The wavelength conversion device achieves both dust prevention and heat dissipation.
Abstract: A multicolor illumination device using an excitation light source and a multi-segmented moving plate with wavelength conversion materials (e.g. phosphors) is disclosed. The exciting light source is a light emitting diode or a laser diode emitting in the UV and/or blue region. The wavelength conversion materials absorb the excitation light and emit longer wavelength light. Each segment of the moving plate contains a different wavelength conversion material or no wavelength conversion material. The plate is supported to move so that different segments are exposed to the excitation light at different times. The plate may be a wheel or rectangular in shape and rotates or oscillates linearly. When the plate moves, light of different colors is generated sequentially in time by the different wavelength conversion materials in different segments of the plate. The multicolor illumination device may be used in a projector system having a microdisplay imager for image display.