Abstract: A waveguide assembly, an optical device and smart glasses are provided. The waveguide assembly includes a first waveguide layer, a second waveguide layer, and a first spacing layer. The first spacing layer includes a first region and a second region. A refractive index of the first region is less than that of the first waveguide layer and that of the second waveguide layer. A refractive index of the second region is less than that of the first region.

Abstract: A diffractive light waveguide apparatus, a near-eye display device, and a manufacturing method for a diffractive light waveguide apparatus are provided. The diffractive light waveguide apparatus includes a waveguide substrate and a grating structure. The grating structure is arranged on a surface of the waveguide substrate and includes multiple grating units, the multiple grating units have a first period in a first direction and a second period in a second direction, and the second direction is different from the first direction. The first period and the second period are adjustable to cause a two-dimensional pupil expansion angle of the grating structure to be 180°.

Abstract: A grating and an optical device are provided. The grating at least includes a first grating layer and a second grating layer. The first grating layer includes first grating portions and second grating portions that are alternately arranged at regular intervals. A refractive index of each of the first grating portions is greater than a refractive index of each of the second grating portions. The second grating layer is disposed at one side of the first grating layer. The second grating layer includes third grating portions and fourth grating portions that are alternately arranged at regular intervals. A refractive index of each of the third grating portions is greater than a refractive index of each of the fourth grating portions. At least part of each of the third grating portions is aligned with each of the first grating portions.

Abstract: Provided are an optical system and a wearable augmented reality display device. The optical system includes: an image projection assembly configured to emit image light; a first optical assembly configured to reflect and transmit the image light emitted by the image projection assembly; a second optical assembly configured to reflect the image light reflected from the first optical assembly and transmit light from a real scene; and a stray light suppression member disposed between the image projection assembly and the first optical assembly and adjacent to a position above an effective reflection surface of the second optical assembly, the stray light suppression member being configured to block light reflected from the first optical assembly to a central region above the reflection surface of the second optical assembly, and/or to block light directly transmitted from the image projection assembly to two side regions above the reflection surface.

Abstract: An augmented reality (AR) display device and a near-eye display device are provided. The AR display device includes a waveguide substrate, an in-coupling grating, a turn grating, and an out-coupling grating. The in-coupling grating is disposed on the waveguide substrate. A grating vector of the in-coupling grating is a first vector K1. The turn grating is disposed on the waveguide substrate. A grating vector of the turn grating is a second vector K2. The out-coupling grating is disposed on the waveguide substrate. A grating vector of the out-coupling grating is a third vector K3. The first vector K1, the second vector K2, and the third vector K3 form a closed vector triangle. An angle A between the third vector K3 and a horizontal direction X satisfies: ?45°?A?45° when the AR display device 1 is used.

Abstract: Embodiments of the present disclosure provide an image display device and a wearable apparatus. The image display device includes a waveguide assembly and a light-emitting unit. The light-emitting unit is configured to emit a light signal. The light signal is transmitted through the waveguide assembly and forms an emergent light signal. A center of the emergent light signal deviates from a center of a viewing angle of a user.

Abstract: Provided are a diffraction grating structure (100), an imaging device (1000), and a wearable apparatus (2000). The diffraction grating structure (100) includes a waveguide sheet (10), a couple-in grating (20), a couple-out grating (30), and a functional layer (40). The couple-in grating (20) is configured to couple light in the waveguide sheet (10). Each of the waveguide sheet (10) and the couple-out grating (30) is configured to couple the light out to the functional layer (40). The functional layer (40) is configured to refract the light to an ambient environment and increase a light-outcoupling rate of the couple-out grating (30).

Abstract: A method and an apparatus for object storage are disclosed. The method includes, in response to an update to metadata of an object in an object storage region to produce updated metadata of the object, recording a metadata object associated with the object in a metadata change storage region separated from the object storage region. The metadata object includes the updated metadata of the object and pointer information. The pointer information points to a first storage location representing a storage location of the object in the object storage region. The method also includes modifying index information associated with the object to produce modified index information. The modified index information indicates the update to the metadata and a second storage location representing a storage location of the metadata object in the metadata change storage region.

Abstract: A method, system, and computer program product for detecting consistency between first and second data replicas is provided. Detecting consistency between data replicas includes acquiring first characteristic information of a first data replica and second characteristic information of a second data replica, the first and second characteristic information being associated with keys of the respective first and second data replicas. Detecting consistency between data replicas further include determining, based on a predetermined threshold value of a number of determination times, whether the first characteristic information is identical to the second characteristic information of the second data replica. In response to the determining that the first characteristic information and the second characteristic information are identical, whether the first data replica is consistent with the second data replica may then be confirmed.

Abstract: A handheld nebulizer includes a body having a control assembly and an actuation assembly. The control assembly is in electrical communication with the actuation assembly for delivering nebulized particles of a compound to a subject. A nebulizing chamber accommodates a removable cartridge for conducting nebulization. The removable cartridge holds a mixture of a compound to be nebulized into nebulized particles. A nebulizing element is affixed or detachably mounted to the removable cartridge, and the removable cartridge is in electrical communication with the control assembly. A removable cartridge for a handheld nebulizer is also provided.

Abstract: A micro-humidifier for operably-connecting to a breathing circuit contains a liquid feed, a liquid chamber operably-connected to the liquid feed, and a vapour generator operably-connected to the liquid chamber. The liquid chamber has a volume of from about 0.01 mL to about 30 mL. The micro-humidifier is operably-connected to and/or is designed to be operably-connected to a breathing circuit upstream of the patient. When the micro-humidifier is operably-connected to a breathing circuit, the vapour from the vapour generator enters into the breathing circuit. A respiratory humidification system contains the a breathing circuit and the micro-humidifier as described herein. The micro-humidifier is operably-connected to the breathing circuit upstream of the patient, and the vapour from the vapour generator enters into the breathing circuit.

Abstract: A method and an apparatus for object storage are disclosed. The method includes, in response to an update to metadata of an object in an object storage region to produce updated metadata of the object, recording a metadata object associated with the object in a metadata change storage region separated from the object storage region. The metadata object includes the updated metadata of the object and pointer information. The pointer information points to a first storage location representing a storage location of the object in the object storage region. The method also includes modifying index information associated with the object to produce modified index information. The modified index information indicates the update to the metadata and a second storage location representing a storage location of the metadata object in the metadata change storage region.

Abstract: A method, system, and computer program product for detecting consistency between first and second data replicas is provided. Detecting consistency between data replicas includes acquiring first characteristic information of a first data replica and second characteristic information of a second data replica, the first and second characteristic information being associated with keys of the respective first and second data replicas. Detecting consistency between data replicas further include determining, based on a predetermined threshold value of a number of determination times, whether the first characteristic information is identical to the second characteristic information of the second data replica. In response to the determining that the first characteristic information and the second characteristic information are identical, whether the first data replica is consistent with the second data replica may then be confirmed.

Abstract: An odor eliminating toilet with an air passage and enclosed ventilating fan is disclosed. Odors are removed from the toilet bowl during use by an air passage connecting the toilet bowl with the sewer outflow. The air passage contains a ventilating fan for removing said odors.

Abstract: A ventilation system for a toilet that provides a clean, convenient and safe means for eliminating unpleasant odors by use of a fan is herein disclosed. This system can be added to an existing toilet or used in newbuilt as so desired. Odors are eliminated directly to the sewer outflow.

Abstract: An odor eliminating toilet with an air passage and enclosed ventilating fan is disclosed. Odors are removed from the toilet bowl during use by an air passage connecting the toilet bowl with the sewer outflow. The air passage contains a ventilating fan for removing said odors.

Abstract: A decorative sheet includes a decorative base layer; an adhesive layer disposed on a surface of the decorative base layer; and transparent layer disposed on an opposing surface of the base layer from the adhesive layer. The base layer may include up to 50 weight percent inorganic non-combustible filler. The sheet has a reduced heat of combustion or reduced flammability relative to currently available decorative sheets.

Abstract: The present invention provides a light source device for projection display, comprising a light source to be supplemented and a laser light source. The laser emitted from the laser light source and the light emitted from the light source to be supplemented are mixed and then output in a same direction.

Abstract: An electrically conductive metal element comprises an electrically conductive metal substrate having a layer of Ni—Sn alloy overlying an electrically conductive surface of the substrate and at least one layer of Ag or of Ag containing Sn overlying the Ni—Sn alloy layer. The Ni—Sn alloy(s) has a Sn-content not greater than for Ni3Sn2 for high temperature uses. In a convenient method of forming the element the Sn is applied to one or more layers of Ni in a Ag+Sn mixture and diffused into the Ni layer(s) to form the Ni—Sn alloy layer and at least one layer of Ag or of Ag containing Sn. The element may have a surface layer of SnO2 which can be formed by oxidizing residual Sn which migrates to the outer surface of the at least one layer of Ag containing Sn.

Abstract: An electrically conductive metal element comprises an electrically conductive metal substrate having a layer of Ni—Sn alloy overlying an electrically conductive surface of the substrate and at least one layer of Ag or of Ag containing Sn overlying the Ni—Sn alloy layer. The Ni—Sn alloy(s) has a Sn-content not greater than for Ni3Sn2 for high temperature uses. In a convenient method of forming the element the Sn is applied to one or more layers of Ni in a Ag+Sn mixture and diffused into the Ni layer(s) to form the Ni—Sn alloy layer and at least one layer of Ag or of Ag containing Sn. The element may have a surface layer of SnO2 which can be formed by oxidising residual Sn which migrates to the outer surface of the at least one layer of Ag containing Sn.