Abstract: An image projection method and a microelectromechanical system (MEMS) image projection apparatus are provided. The image projection method controls a MEMS scanning mirror swinging around a first swing axis to project an image light beam. The image projection method includes following steps. A resonance frequency and a damping coefficient of the MEMS scanning mirror at swinging are measured to calculate a first amplitude scale and a first maintaining period, and a periodic wave signal is generated accordingly. The periodic wave signal is output to the MEMS scanning mirror for controlling the MEMS scanning mirror to swing, and a swing speed error thereof is recorded. By adjusting the first amplitude scale and the first maintaining period, the periodic wave signal is also adjusted, and the corresponding swing speed error is recorded. According to the recorded swing speed errors, the corrected periodic wave signal is generated for controlling the MEMS scanning mirror.

Abstract: An aligning method is provided. The aligning method includes: fixing a plurality of lenses and a beam combining unit in a fixing base; respectively disposing a plurality of light emitting units in a plurality of holders; leaning the holders on the fixing base, and respectively corresponding locations of the light emitting units to locations of the lenses; turning on the light emitting units, and enabling the light beams respectively emitted by the light emitting units to be combined by the beam combining unit after respectively passing through the lenses; and respectively adjusting positions of at least part of the light emitting units by using at least one jig to respectively hold the at least part of the light emitting units until an overlapping degree of the light beams combined by the beam combining unit matches a preset requirement. In addition, an optical apparatus is provided as well.

Abstract: A joint encoding/decoding method for a solid state drive is provided. Firstly, a data-writing process is implemented for encoding a user data by a hard codec and a soft codec respectively, thereby generating a first number of parity bits and a second number of parity bits. Then, the user data, the first number of parity bits and the second number of parity bits are written into a flash memory module. Then, a data-reading process is implemented for decoding the user data by the hard codec according to the first number of parity bits. If the user data is successfully decoded, the user data is outputted. If the user data is unsuccessfully decoded, a step of decoding the user data by the soft codec according to the second number of parity bits is performed.

Abstract: An optical disc drive comprises a flash memory, an optical pick-up head, a spindle motor and a control unit. The control unit generates a determination result according to whether the optical disc drive has a disc loaded therein, and stores the determination result into the flash memory when the optical disc drive receives a power. The control unit reads the determination result from the flash memory after receiving the power again, and determines whether to control the optical pick-up head and the spindle motor to execute the disc detection procedure according to the determination result. If the determination result is negative, whether the optical disc drive has a disc loaded therein is determined according to a rotation speed of the spindle motor. If the rotation speed is larger than a threshold value, the control unit determines that no disc is loaded in the optical disc drive.

Abstract: A solid state storage device receives a device sleep signal and a power signal from a host. The solid state storage device includes a control chip, a sleep control circuit, and a regulator. If the device sleep signal is activated, the control chip temporarily stores a system parameter into a flash memory module and then generates an acknowledge signal. The sleep control circuit receives the power signal, the device sleep signal and the acknowledge signal. If both of the device sleep signal and the acknowledge signal are activated, the sleep control circuit generates a disable state and a wake-up state. Moreover, if the power signal is received by the regulator and the sleep control circuit generates the disable state, the regulator stops providing a supply voltage to the control chip, so that the solid state storage device enters a sleep mode.

Abstract: A data compensating method for a flash memory is provided. Firstly, a first threshold voltage distribution curve of the cells of the flash memory with a first storing state is acquired. Then, a second threshold voltage distribution curve of the cells of the flash memory with a second storing state is acquired. Then, a first occurrence probability of a first type ICI pattern of the first storing state is calculated according to a statistic voltage range and the first threshold voltage distribution curve. A second occurrence probability of the first type ICI pattern of the second storing state is acquired according to the statistic voltage range and the second threshold voltage distribution curve. During a read cycle, storing states of central cells corresponding to the first type ICI pattern are compensated according to the first occurrence probability and the second occurrence probability.

Abstract: A method for determining a storing state of a flash memory is provided. The method includes the following steps. Firstly, plural first specific cell patterns are programmed into the flash memory. Then, plural second specific cell patterns are programmed into the flash memory. Then, a slicing voltage is adjusted to allow a distinguishable error percentage to be lower than a predetermined value. Afterwards, a first storing state and a second storing state of other cells of the flash memory are distinguished from each other according to the adjusted slicing voltage.

Abstract: An input detecting method used for a virtual projecting input system includes: emitting an image light beam through a reflecting mirror, and the image light beam forming a projecting point on a projecting plane; enabling the reflecting mirror to swing, so as to enable the image light beam to swing, and the projecting point scanning back and forth on the projecting plane, and generating an input image; detecting a swing frequency of the reflecting mirror, and generating a frequency signal; judging whether an input action occurs, and if yes, generating a detecting signal; and analyzing a phase difference between the frequency signal and the detecting signal, and calculating an input position of the input action according to the phase difference.

Abstract: An optical measuring apparatus comprising at least one light emitting unit, a stage, at least one lens, and at least one light detector is provided. The light emitting unit emits a light beam. The stage contains accommodating spaces. The accommodating spaces move to the transmission path of the light beam in turn. The lens is located between the light emitting unit and the stage, whose orthogonal projection on the stage appears substantially to be a polygon. When one of the accommodating spaces moves to the transmission path of the light beam, a perpendicular bisector half line of each side of the polygon is not overlapped with another adjacent accommodating space of the accommodating spaces. An optical measuring method is also provided.

Abstract: A controlling method of a storage device is provided. The storage device is in communication with a handheld electronic device. Firstly, a connection status is provided to the handheld electronic device from the storage device, so that the connection status is shown on the handheld electronic device. The connection status indicates that a first storage unit is connected with the storage device. Then, a specified file of the first storage unit is selected according to the connection status shown on the handheld electronic device. Then, a read command is issued from the storage device to the first storage unit, and the specified file of the first storage unit is read in response to the read command. Afterwards, the specified file is stored into the storage device, and a storing result is provided to the handheld electronic device.

Abstract: A safety protection method for a laser projection apparatus is provided. The laser scanning apparatus includes a laser source, a laser source driver, a scanning mirror, and a light-outputting port. The laser source driver is configured to drive the laser source to emit a laser beam. The safety protection method includes the following steps. Firstly, after the laser projection apparatus is powered on, an optical path of the laser beam is adjusted, so that the laser beam is not ejected out from the light-outputting port. Then, the laser source driver is disabled. Then, a judging step is performed to judge whether an intensity of the laser beam is higher than a threshold level. If the intensity of the laser beam is higher than the threshold level, the laser source is turned off.

Abstract: A laser scanning projection apparatus includes an illumination unit, a projection surface, a scanning mirror, a projection window, an optical sensor, and a controlling unit. The projection window includes a transmissible part and a blocking part. A reflection-differential pattern is formed on the blocking part. When the laser beam reflected by the scanning mirror is projected on the transmissible part, the laser beam is transmitted through the transmissible part and projected on the projection surface. When the laser beam reflected by the scanning mirror is projected on the reflection-differential pattern, a reflective beam with different intensities is reflected by the reflection-differential pattern. The controlling unit calculates a phase difference between an actual projection position and a predetermined projection position of the laser beam according to the sensing signal, and compensating a subsequent image frame according to the phase difference.

Abstract: The present invention provides an external CD module for connecting to a remote host device, comprising: a CD mechanism for accessing a data of a CD; a controller, which includes a FAT file system, and the controller is connected to the CD mechanism via a control interface and a data interface to access and convert the data into a file-based format; and a USB interface responsive to the controller, wherein the controller is configured to provide the converted data to the remote host device using MSC communication protocol via the USB interface.

Abstract: A laser projection system comprising a laser light and a human body detection module is disclosed. The laser light source emits a laser light. The human body detection module detects a reflective light of the laser light irradiated on an object. The human body detection module determines whether the object is a human according to a relationship between several reflectivity indexes of the reflective light. If the relationship corresponds to predefined situation, the human body detection module reduces a laser output intensity of the laser light.

Abstract: A portable electronic device with multiple projecting functions is provided. The portable electronic device includes a main body, a projecting module, and a switching mechanism. The projecting module is disposed within the main body for generating an image beam. The switching mechanism is movably disposed on the main body. When the switching mechanism is located at a first position, the image beam is projected along a first projecting path, and the portable electronic device is in a first operating mode. When the switching mechanism is located at a second position, the image beam is projected along a second projecting path, and the portable electronic device is in a second operating mode.

Abstract: A light-source module including a light-source holder, a light source, a collimator lens holder, a collimator lens, a fasten member and an elastic member is suitable for being disposed in a housing. The light-source holder having a convex portion engaged with a concave portion of the housing is adapted to rotate about an axis. The light source disposed in the light-source holder emits a light beam along a beam path. The collimator lens is disposed in the collimator lens holder disposed in the light source holder on the beam path and a distance is maintained between the light source and the collimator lens. When fastened into a positioning hole of the housing, the fasten member pushes the light-source holder to rotate about the axis and the light-source holder presses the elastic member leaned against the light-source holder.

Abstract: An image projection system includes a scaler IC, a micro-projector, a video connector, and a controller. The video connector is coupled to the scaler IC and the micro-projector. The controller controls the video connector and the scaler IC to form a first signal path mode and a second signal path mode. The video connector transmits a first image signal from the scaler IC for external displaying in the first signal path mode. The video connector receives a second image signal from a peripheral device and passes the second image signal to the micro-projector for projection in the second signal path mode.

Abstract: A projection touch system configured for detecting a position of a touch object and a projection touch method thereof are provided. The projection touch system includes an invisible light source, a projection panel and a light detector. The projection panel includes a transparent plate and a fluorescent film. An invisible light beam emitted by the invisible light source scans back and forth on the projection panel. A first fluorescent light beam and a second fluorescent light beam are emitted from the fluorescent film excited by the invisible light beam. When the touch object is touched to the projection panel, a portion of the invisible light beam is reflected to the fluorescent film, and the second fluorescent light beam is emitted. The light detector detects the second fluorescent light beam relative to the first fluorescent light beam by an intensity level to determine the position of touch object.

Abstract: A speckle contrast reducing method for a laser scanning projection system includes the following steps. Firstly, a laser beam is provided. The laser beam is projected on a projection surface according to a first scanning trajectory, thereby generating a first image frame. Sequentially, the laser beam is projected on the projection surface according to a second scanning trajectory, thereby generating a second image frame at an image refresh rate. Moreover, the second scanning trajectory of the second image frame is shifted by a displacement from the first scanning trajectory of the first image frame along a slow-axis direction.

Abstract: A detection method of an image projection device is disclosed. A projection beam is projected on a plurality of projection regions within a projection range, wherein the projection beam carries different features when the projection beam is projected on different projection regions. A reflected beam from the projection range is received and converted to an electrical signal. The feature existing in the electrical signal is analyzed. The projection region corresponding to the feature is determined to identify which of the projection regions is/are blocked by an object.