Abstract:
An impeller which is applied to a fan includes a hub, a plurality of first centrifugal blade and a plurality of second centrifugal blades. The hub is disposed in an accommodating space of the fan. The first centrifugal blades and the second centrifugal blades are connected to the hub. The first centrifugal blades have first ends away from the hub. The second centrifugal blades have second ends away from the hub. A distance between the second end and a center of the hub is larger than that between the first end and the hub center, and the first centrifugal blades and the second centrifugal blades are arranged periodically. Thus, an airflow noise in a constant frequency generated by the impeller can be avoided, and noises in inconstant frequency would not accumulate or generate annoying noise peak.
Abstract:
The antenna matching circuit control device with an antenna body includes a sensing module, a processing module, a power adjusting module and a frequency adjusting module. The sensing module senses an object that approaches the antenna body and outputs a sensing signal accordingly. The processing module is coupled to the sensing module and outputs a first control signal and a second control signal according to the sensing signal. The power adjusting module is coupled to the processing module and controls a power amplifier to couple with one of a plurality of first matching circuits according to the first control signal. The frequency adjusting module is coupled to the antenna body and the power adjusting module. The frequency adjusting module controls one of a plurality of second matching circuits to couple with one of the first matching circuits according to the second control signal.
Abstract:
A touch control device comprises a touchpad, a display unit and a processing unit. The touchpad detects a touch gesture and generates information corresponding to the touch gesture. The processing unit includes a page display module, a gesture processing engine, a gestures determining module and a control module. The gesture processing engine determines whether the information corresponding to the touch gesture includes the information of at least three fingers touch the touchpad. The gestures determining module determines whether the touchpad detects a scrolling gesture made by one of the fingers when the information corresponding to the touch gesture includes the information of at least three fingers touch the touchpad. The control module scrolls the page or image displayed on the display unit according to the scrolling gesture when the touchpad detects the scrolling gesture made by at least one of the fingers.
Abstract:
An electronic device with virtual touch function and an instant adjusting method for virtual touch are provided. The instant adjusting method for virtual touch includes following steps: capturing an image of a user by an image capture device, sensing a distance between the image capture device and the user, defining a location and a size of a touch sensor region according to the distance, mapping the touch sensor region to an effective display region of the display screen, and displaying a display image mapped to the image on the display screen to allow the user to touch control a position of the display screen corresponding to a relative position of the touch sensor region according to the display image. The size of the image is constant regardless whether the distance changes or not.
Abstract:
A display method of an OSD system is provided. The method is used on the display. The OSD system of the display includes various built-in patterns to perform an input operation on the display directly. The OSD system selects and/or displays a pattern on the display, the display of the pattern is performed by the OSD system individually without using the computer or other device. When the computer executes a program, the display displays the frame of the program. The OSD system of the display receives an input operation to select a built-in pattern of the OSD system, the pattern overlaps the frame of the program, and the display displays the pattern and the frame of the program on the display simultaneously.
Abstract:
A wireless communication apparatus and an antenna system therein are provided. The antenna system includes a grounding portion and an antenna body. The grounding portion includes a ground plane and a conducting element. The conducting element is perpendicular to the ground plane and is connected to the ground plane to provide a first current path. The antenna body includes a main radiating portion and a short circuit portion. The main radiating portion is parallel to the ground plane and provides a second current path. An end of the main radiating portion is electrically connected to a signal source. The short circuit portion is electrically connected between the main radiating portion and the conducting element and provides a third current path. The directions of the first current path, the second current path and the third current path are perpendicular mutually.
Abstract:
A heat dissipation device is provided. The heat dissipation device is applied to an electronic device with a first heat source and a second heat source. The heat dissipation device includes a housing, an impeller, a first heat conductive assembly, a second heat conductive assembly and an switch. The housing includes an accommodating space, a first outlet and a second outlet. The first outlet and the second outlet are connected to and through the accommodating space. The impeller is disposed in the accommodating space. The first heat conductive assembly is connected to the first outlet and the first heat source. The second heat conductive assembly is connected to the second outlet and the second heat source. The switch is disposed at the first outlet to open or dose the first outlet.
Abstract:
A centrifugal fan includes a housing and a fan body. The housing includes an upper cover and a lower cover. The fan body is disposed in the housing and includes a hub and at least a blade. The hub is pivotally connected to the lower cover. The blade includes an air intake portion and an air exhaust portion. The air intake portion is connected to the peripheral edge of the hub. The air exhaust portion is connected to the air intake portion and is disposed between the upper cover and the lower cover. The width of the air exhaust portion is gradually reduced along a direction away from the air intake portion.
Abstract:
An operating method of an electronic device is provided. The electronic device includes a display module and a detecting module. The operating method includes: detecting a first input signal by the detecting module; triggering an auxiliary displaying module according to the first input signal, and displaying the auxiliary displaying module on the display module; detecting a second input signal by the detecting module; determining whether the second input signal is in a sensing zone corresponding to the auxiliary displaying module; and displaying a drawing track along an edge of the auxiliary displaying module according to the second input signal when the second input signal is in the sensing zone.
Abstract:
An electronic device with a casing is provided. The electronic device includes a first opening, a second opening, and a feed-in circuit. The first opening is formed at one side of the casing, and the first opening extends into the casing to form a first slit. The second opening is formed adjacent to the first opening, and the second opening extends into the casing to form a second slit. The feed-in circuit is coupled to the first slit and the second slit, and the projection of the feed-in circuit partly overlaps the first slit and second slit.