Abstract:
A laser projection device and a laser projection system. The laser projection device comprises a light source scanner (1) and a MEMS scanning mirror (2), the light source scanner (1) comprising micro laser diodes (11); and the micro laser diodes (11) are used to provide laser beams needed for image projection, and the laser beams are projected to the MEMS scanning mirror (2), and then reflected by the MEMS scanning mirror (2) to a predetermined area (3) to form a projection image. By providing the micro laser diodes (11) in the laser projection device and initiatively emitting laser by exciting the micro laser diodes (11), the laser projection device does not need an external laser source and facilitates the reduction of the size of the laser projection device, as compared with the prior art.
Abstract:
A silicon microphone (10) with a high-aspect-ratio corrugated diaphragm (200). The microphone (10) comprises a compliant diaphragm (200) on which at least one ring-shaped corrugation (210) is formed in the vicinity of the edge of the diaphragm (200) which is fixed to the substrate (100), wherein the depth of the corrugation (210) to the thickness of the diaphragm (200) is larger than 5:1, preferably 20:1, and the walls of the corrugation (210) are inclined to the surface of the diaphragm (200) at an angle in the range of 80º to 100º. The microphone (10) with a high-aspect-ratio corrugated diaphragm (200) can achieve a consistent and optimal sensitivity and reduce impact applied thereto in a drop test so that the performances, the reproducibility, the reliability and the yield can be improved.
Abstract:
A CMOS compatible silicon differential condenser microphone and a method for manufacturing the same are provided. The microphone(1000) comprises a silicon substrate(100), wherein a CMOS circuitry is accommodated thereon; a first rigid conductive perforated backplate(200) supported on the silicon substrate with an insulating layer(120) inserted therebetween; a second rigid perforated backplate(400) formed above the first backplate, including CMOS passivation layers(400a, 400c) and a metal layer(400b) sandwiched between the CMOS passivation layers as an electrode plate of the second plate, wherein an air gap, with a spacer forming its boundary, is provided between the opposite perforated areas of the first backplate and the second backplate; a compliant diaphragm(300) provided between the first backplate and the second backplate, wherein a back hole(150) is formed to be open in the silicon substrate underneath the first backplate so as to allow sound pass through, and the diaphragm and the first backplate form a first variable condenser, the diaphragm and the second backplate form a second variable condenser, and the first variable condenser and the second variable condenser form differential condensers.
Abstract:
A MEMS microphone, comprising a packaging structure that is enveloped by a PCB substrate (1) and a housing (2), wherein the packaging structure is provided with a MEMS acoustoelectric chip (3) therein, and the PCB substrate (1) is provided with a sound port (11) at a position that is corresponding to the MEMS acoustoelectric chip (3), wherein, the MEMS microphone further comprises a filter (5), wherein the filter (5) is embedded into a back cavity of the MEMS acoustoelectric chip (3), the filter (5) and the PCB substrate (1) have a lateral hole therebetween, and the lateral hole serves as a sound channel that is used by the MEMS acoustoelectric chip (3)to gather sound. The MEMS microphone can prevent gas shock, block the interfering to the MEMS microphone by kinetic particles, keep the acoustic performance of the MEMS microphone, and reduce the packaging size of the MEMS microphone.
Abstract:
A laser projection device and a laser projection system are provided. The laser projection device comprises an optical fiber scanner (1) and a MEMS scanning mirror (2). An optical fiber (11) is disposed on the optical fiber scanner (1) and the optical fiber (11) is used to deliver laser beams needed by projection. The optical fiber scanner (1) drives the optical fiber (11) to scan in a first plane and enables the laser beam to project to the MEMS scanning mirror (2), and the MEMS scanning mirror (2) makes scanning movement about a first axis and reflects the laser beam to a predetermined area (3) to form a projection image, wherein the first axis is located in the first plane, or the first axis is parallel to the first plane. Different from the manner in the prior art that the optical fiber scanner or the MEMS scanning mirror makes dual-axis movement individually to implement projection, this laser projection device achieves laser projection by enabling the optical fiber scanner and the MEMS scanning mirror to scan simultaneously in different directions.
Abstract:
Providing a method for manufacturing a thermal bimorph diaphragm and a MEMS speaker with thermal bimorphs, wherein the method comprises the steps of: thermally oxidizing a substrate (1) to obtain an insulating layer (2) thereon and providing a metal layer (3) on the insulating layer (2); providing a sacrificial layer (4) on the metal layer (3); providing a first thermal bimorph layer (5) on the sacrificial layer (4); providing a second thermal bimorph layer (6) on the first thermal bimorph layer (5); providing a metal connecting layer (7) at the positions on the metal layer (3) where the sacrificial layer (4) is not provided; forming corresponding back holes (16) on the substrate (1) and the insulating layer (2) and releasing the sacrificial layer (4); forming a warped thermal bimorph diaphragm with the first thermal bimorph layer (5) and the second thermal bimorph layer (6) after the sacrificial layer (4) is released. With the MEMS speaker with thermal bimorphs, the problems of high production cost, complicated wafer process and limitations on sound performance improvements are solved.
Abstract:
An image display device comprises: a thin film transistor backplane (1), and a first resolution display panel (2), a second resolution display panel (4), a display driving chip (3) and an integrated display driver (5), which are fixed on the thin film transistor backplane (1); the display driving chip (3) is electrically connected to bonding pads (111) on the thin film transistor backplane (1), and is provided under the second resolution display panel (4); and the display driving chip (3) is used for driving the second resolution display panel (4); the integrated display driver (5) is used for driving the first resolution display panel (2); and a resolution of the first resolution display panel (2) is lower than a resolution of the second resolution display panel (4). The first resolution display panel (2) is driven by the standard drive manner of thin film transistor display panels, to realize low resolution displaying, and the second resolution display panel (4) is driven by the display driving chip (3), to improve the displaying quality of the display device.
Abstract:
The present invention relates to an anti-impact silicon based MEMS microphone, a system and a package with the same, the microphone comprises: a silicon substrate provided with a back hole therein; a compliant diaphragm supported on the silicon substrate and disposed above the back hole thereof; a perforated backplate disposed above the diaphragm with an air gap sandwiched in between, and further provided with one or more first thorough holes therein; and a stopper mechanism, including one or more T-shaped stoppers corresponding to the one or more first thorough holes, each of which has a lower part passing through its corresponding first thorough hole and connecting to the diaphragm and an upper part being apart from the perforated backplate and free to vertically move, wherein the diaphragm and the perforated backplate are used to form electrode plates of a variable condenser. In the anti-impact microphone, the stopper mechanism may help to restrain the fragile and brittle diaphragm from large movement induced by sound pressure impact in a drop test and thus prevent the diaphragm from being damaged.
Abstract:
The present invention relates to a CMOS compatible MEMS microphone, comprising: an SOI substrate, wherein a CMOS circuitry is accommodated on its silicon device layer; a microphone diaphragm formed with a part of the silicon device layer, wherein the microphone diaphragm is doped to become conductive; a microphone backplate including CMOS passivation layers with a metal layer sandwiched and a plurality of through holes, provided above the silicon device layer, wherein the plurality of through holes are formed in the portions thereof opposite to the microphone diaphragm, and the metal layer forms an electrode plate of the backplate; a plurality of dimples protruding from the lower surface of the microphone backplate opposite to the diaphragm; and an air gap, provided between the diaphragm and the microphone backplate, wherein a spacer forming a boundary of the air gap is provided outside of the diaphragm or on the edge of the diaphragm; wherein a back hole is formed to be open in substrate underneath the diaphragm so as to allow sound pass through, and the microphone diaphragm is used as an electrode plate to form a variable capacitive sensing element with the electrode plate of the microphone backplate.
Abstract:
A method for manufacturing a fully wafer-level-packaged MEMS microphone and a microphone manufactured with the same are provided, the method comprises: separately manufacturing a first packaging wafer, an MEMS microphone wafer and a second packaging wafer; performing wafer-to-wafer bonding for the three wafers to form a plurality of fully wafer-level-packaged MEMS microphone units; singulating the fully wafer-level-packaged MEMS microphone units to form a plurality of fully wafer-level-packaged MEMS microphones, which are fully packaged at wafer level and do not need any further process after die singulation. The method can improve cost-effectiveness, performance consistency, manufacturability, quality, scaling capability of the packaged MEMS microphone.