Abstract: An actuator module and a projector having the same are provided. The actuator module includes an actuator including a frame and a lens movably disposed on the frame, and a pair of weighted blocks disposed on the frame and located at two opposite sides of the lens.

Abstract: An object displacement detection method includes capturing n images of an object for obtaining n sets of image dots, where the object corresponds to an ith set of image dots in an ith image of the n images; performing (n?1) difference calculations using the n sets of image dots to obtain (n?1) sets of difference image dots, where a jth set of difference image dots of the (n?1) sets of difference image dots is generated by performing a jth difference calculation of the (n?1) difference calculations using a (j+1)th set of image dots and a jth set of image dots of the n sets of the image dots; and determining the object has displaced when a sum of numbers of the (n?1) sets of difference image dots reaches a first threshold.

Abstract: An optical engine module and a projector having the same are provided. The optical engine module includes an optical engine housing having a sound outlet, a light modulation unit disposed in the optical engine housing, and a heat dissipation tube disposed on the optical engine housing at an outer side of the optical engine housing and configured to dissipate heat from the optical engine housing. The heat dissipation tube communicates with the sound outlet. Noise is generated when the light modulation unit is operated. The noise travels from the sound outlet into the heat dissipation tube and is reflected back through the heat dissipation tube to the sound outlet to form a reflected sound wave, and the heat dissipation tube has a length enabling the reflected sound wave and the noise to have a phase difference of 180 degrees.

Abstract: A plurality of test pads are formed on a first substrate or a second substrate. A plurality of first solder joints are reserved on a first surface of the first substrate, and each of the first solder joints is coupled to at least a test pad or to another first solder joint through at least a first trace. A plurality of second solder joints are reserved on a second surface of the second substrate. Each of the second solder joints is coupled to at least a test pad or to another second solder joint through at least a second trace. A plurality of dummy solder balls are formed between the first solder joints and the second solder joints. Probes are coupled to the test pads to measure circuit characteristics between the test pads.

Abstract: An intraoral scanning system includes a motion sensing unit, an image sensing unit, a storage unit and a processing unit. The processing unit classifies first position information and second position information obtained by the motion sensing unit and the image sensing unit in an initial scanning process into first groups and second groups, wherein the first position information and the second position information are stored in the storage unit. The processing unit selectively uses the first groups or the second groups to perform comparison in a re-scanning process, so as to position an incomplete area in a model.

Abstract: A lane changing system includes an inertia-detecting unit for detecting a vehicle speed, an acceleration, and body parameters of a vehicle, a geographic information unit for detecting a real-time position of the vehicle and storing road-borderline information, a visual tracker for detecting a road curvature and a relative distance and capturing a road-borderline image and a vehicle-surrounding image, a memory storing vehicle parameters, a processor, and a rotation device. The processor calculates a lateral acceleration according to the vehicle parameters, the vehicle speed, the acceleration, and the road curvature. The processor generates a steering signal when the processor determines that the relative distance is less than a first threshold, the lateral acceleration is less than a second threshold, and there is no other vehicle around the vehicle. The rotation device receives the steering signal to for making the vehicle change from an original vehicle lane to an adjacent vehicle lane.

Abstract: A three-dimensional scanning system includes a projection module, an image capturing module, and a reflector. The projection module includes a light source and a pattern generator. The light source provides a short-wavelength infrared light beam. The pattern generator receives the short-wavelength infrared light beam to project a predetermined pattern. The image capturing module captures the image formed by the predetermined pattern on an object to be scanned. The reflector reflects the short-wavelength infrared light beam to project the predetermined pattern on the object, and reflects the short-wavelength infrared light beam reflected by the object so the image capturing module can capture the image.

Abstract: An intraoral scanning system includes a motion sensing unit, an image sensing unit, a storage unit and a processing unit. The processing unit classifies first position information and second position information obtained by the motion sensing unit and the image sensing unit in an initial scanning process into first groups and second groups, wherein the first position information and the second position information are stored in the storage unit. The processing unit selectively uses the first groups or the second groups to perform comparison in a re-scanning process, so as to position an incomplete area in a model.

Abstract: The invention provides a three-dimensional object scanning device using structured lights and method using the same. A combination of specific monochrome light sources is used to construct the content of the structured lights to form a predetermined image, which is projected to the three-dimensional object such as an intraoral object. The combination of blue and green lights effectively eliminates reflective interference of the red or white environment within the intraoral space. Default patterns of the predetermined image are distinguished from one another by using well designed arrangement of color blocks so that specific coding information of location may be embedded and exploited.

Abstract: A lane keeping and following system applied to a vehicle includes a global positioning device, a high-precision road map unit, and a following control device. The global positioning device is used for continuously generating and outputting global positioning information. The high-precision road map unit is used for storing a plurality of pieces of road information. Each piece of road information includes lane information. Each piece of lane information includes lane marking geometric information. The following control device is electrically connected to the global positioning device and the high-precision road map unit, and is used for receiving the global positioning information and matching the road information, to find the lane information currently corresponding to the global positioning information, and retrieving the lane marking geometric information included in the current lane information and controlling the vehicle to travel following the current lane marking geometric information.

Abstract: An object displacement detection method includes capturing n images of an object for obtaining n sets of image dots, where the object corresponds to an ith set of image dots in an ith image of the n images; performing (n?1) difference calculations using the n sets of image dots to obtain (n?1) sets of difference image dots, where a jth set of difference image dots of the (n?1) sets of difference image dots is generated by performing a jth difference calculation of the (n?1) difference calculations using a (j+1)th set of image dots and a jth set of image dots of the n sets of the image dots; and determining the object has displaced when a sum of numbers of the (n?1) sets of difference image dots reaches a first threshold.

Abstract: An image capturing device includes an image capturing unit, a light filter module, a light sensing unit, an infrared light source and a processing unit. The light filter module includes a first light filter and a second light filter. The first light filter filters an infrared and allows a visible light to pass. The second light filter filters a visible light and allows an infrared to pass. The light sensing unit senses an environmental light. When the processing unit determines that an intensity of the environmental light is higher than a threshold, the processing unit alternately switches the first light filter and the second light filter to a front of the image capturing unit, controls the image capturing unit to capture a visible light image through the first light filter, and controls the image capturing unit to capture an infrared image through the second light filter.

Abstract: A projector includes an apparatus casing, a light source module, a flow generating device, a sensing module, and a power module. The light source module is disposed inside the apparatus casing and includes a light-emitting part and a lampshade surrounding the light-emitting part. The flow generating device can generate an air flow for dissipating heat by the light source module. The sensing module is disposed in the apparatus casing and includes a thermo-sensitive component disposed near the lampshade and located in a flowing path of the air flow. The power module is disposed in the apparatus casing and electrically connected to the light source module and the sensing module. The power module selectively stops powering the light source module according to an electric parameter of the thermo-sensitive component. Thereby, the invention protects the projector from being overheated by use of the thermo-sensitivity of the thermo-sensitive component.

Abstract: A projector includes an apparatus casing, a light source module, a flow generating device, a sensing module, and a power module. The light source module is disposed inside the apparatus casing and includes a light-emitting part and a lampshade surrounding the light-emitting part. The flow generating device can generate an air flow for dissipating heat by the light source module. The sensing module is disposed in the apparatus casing and includes a thermo-sensitive component disposed near the lampshade and located in a flowing path of the air flow. The power module is disposed in the apparatus casing and electrically connected to the light source module and the sensing module. The power module selectively stops powering the light source module according to an electric parameter of the thermo-sensitive component. Thereby, the invention protects the projector from being overheated by use of the thermo-sensitivity of the thermo-sensitive component.

Abstract: A portable electronic device is provided. The portable electronic device includes a casing, a display unit, a roller, an encoder and a controller. The casing has a casing surface. The display unit is disposed on the casing surface. The roller is rotatably disposed on the casing surface with a portion of the roller being exposed outside the casing. The roller is for adjusting the voice of the portable electronic device when the portable electronic device works at a voice-adjusting mode. The roller is for touching a surface and rotating on the surface to measure a length when the portable electronic device works at a length-measuring mode. The encoder disposed inside the casing is for outputting a pulse number. The controller receives the pulse number and determines a length value accordingly, and then controls the display unit to display the length value.

Abstract: A portable electronic device is provided. The portable electronic device includes a casing, a display unit, a roller, an encoder and a controller. The casing has a casing surface. The display unit is disposed on the casing surface. The roller is rotatably disposed on the casing surface with a portion of the roller being exposed outside the casing. The roller is for adjusting the voice of the portable electronic device when the portable electronic device works at a voice-adjusting mode. The roller is for touching a surface and rotating on the surface to measure a length when the portable electronic device works at a length-measuring mode. The encoder disposed inside the casing is for outputting a pulse number. The controller receives the pulse number and determines a length value accordingly, and then controls the display unit to display the length value.