Abstract: An electronic device with fingerprint sensing function and a fingerprint comparison method are provided. The electronic device includes a fingerprint sensor and a processor. The fingerprint sensor is configured to obtain a first fingerprint image. The processor is coupled to the fingerprint sensor and configured to execute a fingerprint comparison operation to compare the first fingerprint image with a first registered image. When comparison between the first fingerprint image and the first registered image fails, the processor adjusts an image resolution of one of the first fingerprint image and the first registered image, and re-executes the fingerprint comparison operation to determine whether a current fingerprint sensing passes fingerprint verification.

Abstract: An electronic device with fingerprint sensing function and a fingerprint comparison method are provided. The electronic device includes a fingerprint sensor and a processor. The fingerprint sensor is configured to obtain a first fingerprint image. The processor is coupled to the fingerprint sensor and configured to execute a fingerprint comparison operation to compare the first fingerprint image with a first registered image. When comparison between the first fingerprint image and the first registered image fails, the processor adjusts an image resolution of one of the first fingerprint image and the first registered image, and re-executes the fingerprint comparison operation to determine whether a current fingerprint sensing passes fingerprint verification.

Abstract: The present invention discloses an image capturing device and an automatic backlash correction method, comprising: a group of zoom lenses, a storage module and a processing module. The processing module drives the group of zoom lenses moving to a datum point to get the moving step value. The current backlash value is then calculated according to the moving step value and the predetermined step value. Then, the difference value between the current backlash value and the predetermined step value are stored in the storage module. The processing module determines whether the difference value is within an allowable error range. When the difference value is within the allowable error range, the processing module writes the current backlash value into the storage module to replace the backlash compensation value. Therefore, the backlash compensation value of the image capturing device can be corrected automatically to enhance image quality.

Abstract: The present invention discloses a dual-motor lens actuating device and method thereof. The device comprises a first backup plate, second backup plate, first driving motor, second driving motor, position sensor, step sensing unit and microcontroller. The first backup plate is installed to a zoom lens group; the second backup plate is installed to a focus lens group. The first driving motor and the second driving motor drive the movements of the zoom lens group and focus lens group respectively. The position sensor senses positions of the first and second backup plates to transmit a position signal. The step sensing unit senses movements corresponding to the lens groups to transmit a step signal. The microcontroller controls the first driving motor and the second driving motor to drive the movements of the zoom lens group and focus lens group according to the position signal and step signal.

Abstract: The present invention discloses an image capturing device and an automatic backlash correction method, comprising: a group of zoom lenses, a storage module and a processing module. The processing module drives the group of zoom lenses moving to a datum point to get the moving step value. The current backlash value is then calculated according to the moving step value and the predetermined step value. Then, the difference value between the current backlash value and the predetermined step value are stored in the storage module. The processing module determines whether the difference value is within an allowable error range. When the difference value is within the allowable error range, the processing module writes the current backlash value into the storage module to replace the backlash compensation value. Therefore, the backlash compensation value of the image capturing device can be corrected automatically to enhance image quality.

Abstract: A lens driving device and a lens driving method thereof The lens driving device comprises an image sensing element used to sense an image of an image pickup target; a focus lens group used to change a focus point of the image; a direct current motor used to drive and move the focus lens group; and a microcontroller electrically coupled to the image sensing element for receiving the image signal, and used to control the direct current motor to drive and move the focus lens group for changing the focus point of the image, such that a contrast ratio of the image signal will change. Also, the microcontroller calculates a contrast value according to the contrast ratio. A process of focusing is completed while the focus lens group is located at a position of a maximum contrast value corresponding to the image signal.

Abstract: A projector includes a projecting module for projecting a projecting image on a screen panel, an image sensor for capturing an image of an object which is located outside of the projecting module and faces toward the lens module, a light director, and a controlling unit. The projecting module has a lens module and a light source for emitting light transmitting through the lens module. The light director is movable between a first position where the light director is located outside of a light path associated with the lens module, and a second position where the light director is configured for directing light of the object through the lens module to be incident on the image sensor. The controlling unit controls the light director to move between the first and second positions.

Abstract: A flash device includes a flash module and a color wheel. The flash module includes a flash lamp and a trigger circuit for triggering the flash lamp. The color wheel includes a color filter disk. The color filter disk includes a number of filter segments, wherein each of the filter segments is capable of being inserted into the light-emitting path of the flash lamp by rotation the color filter disk.

Abstract: A lens decenter error measuring apparatus including a testing device, a lens supporter, and a lens carrier is disclosed. The testing device is configured for measuring a decenter error of a lens. The lens supporter is configured for receiving the lens. The lens carrier is installed within the lens supporter and includes at least three spheres and an elastic member. The spheres associated with the elastic member constrain the lens when the lens is placed in the lens supporter.

Abstract: An apparatus for measuring stray light in a lens module includes a light source, an image sensor, an object distance adjusting unit, and an object distance measuring device. The light source is disposed at an object side of the lens module for emitting light to the lens module. The image sensor is disposed at an image side of the lens module for measuring an intensity of stray light coming into the lens module. The object distance adjusting unit includes an opaque barrier defining a slit therein, and a laser aligned with the slit, the laser being configured for emitting a laser light beam through the slit thereby forming a light spot serving as an object. The object distance measuring device is configured for measuring an object distance. The opaque barrier of the object distance adjusting unit is movable relative to the wavefront sensor so as to adjust the object distance.

Abstract: A flash device includes a flash module and a color wheel. The flash module includes a flash lamp and a trigger circuit for triggering the flash lamp. The color wheel includes a color filter disk. The color filter disk includes a number of filter segments, wherein each of the filter segments is capable of being inserted into the light-emitting path of the flash lamp by rotation the color filter disk.

Abstract: An apparatus for measuring stray light in a lens module includes a light source, an image sensor, an object distance adjusting unit, and an object distance measuring device. The light source is disposed at an object side of the lens module for emitting light to the lens module. The image sensor is disposed at an image side of the lens module for measuring an intensity of stray light coming into the lens module. The object distance adjusting unit includes an opaque barrier defining a slit therein, and a laser aligned with the slit, the laser being configured for emitting a laser light beam through the slit thereby forming a light spot serving as an object. The object distance measuring device is configured for measuring an object distance. The opaque barrier of the object distance adjusting unit is movable relative to the wavefront sensor so as to adjust the object distance.

Abstract: A lens decenter error measuring apparatus including a testing device, a lens supporter, and a lens carrier is disclosed. The testing device is configured for measuring a decenter error of a lens. The lens supporter is configured for receiving the lens. The lens carrier is installed within the lens supporter and includes at least three spheres and an elastic member. The spheres associated with the elastic member constrain the lens when the lens is placed in the lens supporter.

Abstract: A projector includes a projecting module for projecting a projecting image on a screen panel, an image sensor for capturing an image of an object which is located outside of the projecting module and faces toward the lens module, a light director, and a controlling unit. The projecting module has a lens module and a light source for emitting light transmitting through the lens module. The light director is movable between a first position where the light director is located outside of a light path associated with the lens module, and a second position where the light director is configured for directing light of the object through the lens module to be incident on the image sensor. The controlling unit controls the light director to move between the first and second positions.