Abstract: A new process to synthesis of compound OBI-3424 R-form and S-form products is provided. The “R-form” compound OBI-3423 was first synthesized with 48% overall yield from compound OBI-3424-5 by installation of the labile phosphate motif at later stage. The stereo chemistry is established by 5 steps chemo-enzyme combination synthesis to afford 99% optical purity. After then, the “S-form” compound OBI-3424 is prepared with improving overall yield of 54% from compound OBI-3424-5. The stereo chemistry is established by 4 steps combination of chemo-enzyme synthesis with excellent optical purity of 99%.

Abstract: A wearable display device, including an optical waveguide element and a projection device, is provided. The projection device includes an optical engine main body, a light emitting unit, an optical combiner, a projection lens, and a connection assembly. The light emitting unit is connected to the optical engine main body and configured to emit an illumination beam. The optical combiner is disposed in the optical engine main body, located on a transmission path of the illumination beam, and configured to guide the illumination beam to form an image beam. The projection lens is connected to the optical engine main body, located on a transmission path of the image beam, and configured to project the image beam. The connection assembly includes a flexible circuit board and a system connector. The light emitting unit is connected to the flexible circuit board and electrically connected to the system connector.

Abstract: A wearable display device includes an optical waveguide element and a projection device. The projection device includes an optical engine main body, at least one light emitting unit, an optical combiner, and a projection lens. The optical engine main body has at least one positioning structure. The light emitting unit is connected to the optical engine main body and configured to emit an illumination beam. The optical combiner is disposed in the optical engine main body and positioned at the positioning structure, the optical combiner is located on a transmission path of the illumination beam, and the optical combiner is configured to guide the illumination beam to form an image beam. The projection lens is connected to the optical engine main body, and the projection lens is located on a transmission path of the image beam and configured to project the image beam to the optical waveguide element.

Abstract: A new process to synthesis of compound OBI-3424 R-form and S-form products is provided. The “R-form” compound OBI-3423 was first synthesized with 48% overall yield from compound OBI-3424-5 by installation of the labile phosphate motif at later stage. The stereo chemistry is established by 5 steps chemo-enzyme combination synthesis to afford 99% optical purity. After then, the “S-form” compound OBI-3424 is prepared with improving overall yield of 54% from compound OBI-3424-5. The stereo chemistry is established by 4 steps combination of chemo-enzyme synthesis with excellent optical purity of 99%.

Abstract: A projection device includes at least one projection module and at least one adjusting structure. The projection module has an optical axis and is adapted to emit an image beam. The image beam is transmitted to a projection target to form a projection image. The adjusting structure includes a base and an adjusting component. The adjusting component is rotatably connected to the base along a first axis, and the projection module is rotatably connected to the adjusting component along the optical axis. The adjusting component and the projection module are adapted to rotate along the first axis such that the projection image moves vertically, and the projection module is adapted to rotate along the optical axis such that the projection image rotates.

Abstract: A projection device including at least one projection module and at least one adjusting structure is provided. The projection module has at least one optical axis. The projection module is adapted to provide an image beam. The image beam is transmitted along a light transmission path to a projection target and forms a projection image. The adjusting structure is connected to the projection module. The adjusting structure is adapted to drive at least a part of the projection module to rotate along the optical axis such that the projection image rotates.

Abstract: A projection device including at least one projection module, at least one reflecting element, and at least one adjusting structure is provided. The projection module has at least one optical axis. The projection module is adapted to provide a projection beam. The projection beam is transmitted along a light transmission path to a projection target to form a projection image. The reflecting element is disposed between the at least one projection module and the projection target and located on the optical axis and has a reflecting surface, wherein the reflecting surface is adapted to reflect the projection beam to the projection target. The adjusting structure is connected to the projection module and the reflecting element. The adjusting structure is adapted to drive the projection module and the reflecting element to rotate along a second axis such that the projection image rotates.

Abstract: A projection device including at least one projection module, at least one reflecting element, and at least one adjusting structure is provided. The projection module has at least one optical axis. The projection module is adapted to provide a projection beam. The projection beam is transmitted along a light transmission path to a projection target to form a projection image. The reflecting element is disposed between the at least one projection module and the projection target and located on the optical axis and has a reflecting surface, wherein the reflecting surface is adapted to reflect the projection beam to the projection target. The adjusting structure is connected to the reflecting element. The adjusting structure is adapted to drive the reflecting element to rotate along a first axis such that the projection image moves horizontally.

Abstract: A projection device includes at least one projection module and at least one adjusting structure. The projection module has an optical axis and is adapted to emit an image beam. The image beam is transmitted to a projection target to form a projection image. The adjusting structure includes a base and an adjusting component. The adjusting component is rotatably connected to the base along a first axis, and the projection module is rotatably connected to the adjusting component along the optical axis. The adjusting component and the projection module are adapted to rotate along the first axis such that the projection image moves vertically, and the projection module is adapted to rotate along the optical axis such that the projection image rotates.

Abstract: A projection device including at least one projection module, at least one reflecting element, and at least one adjusting structure is provided. The projection module has at least one optical axis. The projection module is adapted to provide a projection beam. The projection beam is transmitted along a light transmission path to a projection target to form a projection image. The reflecting element is disposed between the at least one projection module and the projection target and located on the optical axis and has a reflecting surface, wherein the reflecting surface is adapted to reflect the projection beam to the projection target. The adjusting structure is connected to the projection module and the reflecting element. The adjusting structure is adapted to drive the projection module and the reflecting element to rotate along a second axis such that the projection image rotates.

Abstract: A projection device including at least one projection module and at least one adjusting structure is provided. The projection module has at least one optical axis. The projection module is adapted to provide an image beam. The image beam is transmitted along a light transmission path to a projection target and forms a projection image. The adjusting structure is connected to the projection module. The adjusting structure is adapted to drive at least a part of the projection module to rotate along the optical axis such that the projection image rotates.

Abstract: A projection device including at least one projection module, at least one reflecting element, and at least one adjusting structure is provided. The projection module has at least one optical axis. The projection module is adapted to provide a projection beam. The projection beam is transmitted along a light transmission path to a projection target to form a projection image. The reflecting element is disposed between the at least one projection module and the projection target and located on the optical axis and has a reflecting surface, wherein the reflecting surface is adapted to reflect the projection beam to the projection target. The adjusting structure is connected to the reflecting element. The adjusting structure is adapted to drive the reflecting element to rotate along a first axis such that the projection image moves horizontally.

Abstract: A head-mounted display device includes a belt body, a buckle assembly disposed on the belt body, and an electronic module disposed on the buckle assembly. The buckle assembly includes a base movably fixed to the belt body and a cover detachably disposed on the base. One of the base and the cover includes a sliding rail while the other includes a sliding member. One of the base and the cover includes an arm and a hook protruding from the arm while the other includes an engaging indent. The electronic module including a display module is disposed on the cover. The hook is engaged with the engaging indent so that the cover is fixed to the base.

Abstract: A universal joint module includes a base, a first bearer, a rotor, a fastening member, and an elastic member. The base has an inner space, a hole, and an opening opposite to the hole communicating with the inner space. The first bearer is disposed in the inner space. The rotor includes a knob rotatably disposed in the inner space and leant against the first bearer, and a shaft connected to the knob and passing through the hole. The fastening member is located in the inner space and close to the opening, and movably fastened to the base to adjust a distance between the fastening member and the first bearer. The elastic member located between the first bearer and the fastening member presses the first bearer to preserve a stress between the first bearer and the knob. A head-mounted display device using the universal joint is also provided.

Abstract: A head-mounted display device includes a belt body, a buckle assembly disposed on the belt body, and an electronic module disposed on the buckle assembly. The buckle assembly includes a base movably fixed to the belt body and a cover detachably disposed on the base. One of the base and the cover includes a sliding rail while the other includes a sliding member. One of the base and the cover includes an arm and a hook protruding from the arm while the other includes an engaging indent. The electronic module including a display module is disposed on the cover. The hook is engaged with the engaging indent so that the cover is fixed to the base.

Abstract: The present invention provides an ?-selective glycosylation method. The ?-selective glycosylation method includes performing a reaction of a donor having a saccharide structure and a formamide-containing compound to form a glycosyl imidate compound; and in one pot environment, performing an addition reaction of the glycosyl imidate compound and an acceptor having a hydroxyl group to form an ?-glycoside with high ?-selectivity. The ?-selective glycosylation method is applicable to the large scale production and easy to recover the formamide-containing compound.