Abstract: An electronic assembly includes an electronic device and an external device. The electronic device includes a main body and a fixing base. The main body includes a first opening. The fixing base includes an upper cover, a cam, a first spring, a button, a second spring, a pedestal, a first retractable hook and a second retractable hook. The first retractable hook includes a first inclined protrusion structure. The second retractable hook includes a second inclined protrusion structure. The external device includes a bracket. The bracket includes a first insertion piece and a second insertion piece. The first insertion piece includes a seventh opening. The second insertion piece includes an eighth opening. The first insertion piece and the second insertion piece are penetrated through the first opening. The first inclined protrusion structure is inserted into the seventh opening. The second inclined protrusion structure is inserted into the eighth opening.

Abstract: A driving circuit includes a first transistor, a capacitor, a second transistor, and a driving transistor. The first transistor is configured to provide a data signal according to a first scan signal. The capacitor is coupled to the first transistor, and the capacitor includes a first terminal and a second terminal. The second transistor is coupled to the first transistor, and the second transistor is configured to provide a start signal according to the data signal. The driving transistor is coupled to the second transistor, and the driving transistor is configured to output a driving signal according to the start signal.

Abstract: A control device includes a display panel and plural key structures. Each key structure includes a keycap, an optical film layer, an elastic element, plural raised structures and a membrane switch. The optical film layer includes a light-transmissible region and a supporting region. The plural raised structures are formed on the supporting region and arranged around the light-transmissible region. The membrane switch includes an upper film layer and a lower film layer. Moreover, a light beam emitted by the display panel is transmitted upwardly through a second opening of the lower film layer, a first opening of the upper film layer, the light-transmissible region, a hollow part of the elastic element and the keycap. When the keycap is pressed down, the first circuit contact point of the upper film layer and the corresponding second circuit contact point of the lower film layer are contacted with each other.

Abstract: A fixing device is provided for fixing an expansion card in an electronic device. The fixing device includes a supporting base, a fastening element and an actuating element. The supporting base includes a sliding rail. The sliding rail is located under the expansion card. The sliding rail includes plural first positioning structures. The fastening element includes a sliding part and a locking part. The sliding part is movably installed on the sliding rail. The locking part is protruded from the sliding part. The expansion card is arranged between the locking part and an expansion port of the electronic device. The actuating element includes a pressing part and an elastic part. The pressing part is connected with the sliding part through the elastic part. The pressing part includes a second positioning structure. The second positioning structure is detachably engaged with one of the plural first positioning structures.

Abstract: A fixing device is provided for fixing an expansion card in an electronic device. The fixing device includes a supporting base, a fastening element and an actuating element. The supporting base includes a sliding rail. The sliding rail is located under the expansion card. The sliding rail includes plural first positioning structures. The fastening element includes a sliding part and a locking part. The sliding part is movably installed on the sliding rail. The locking part is protruded from the sliding part. The expansion card is arranged between the locking part and an expansion port of the electronic device. The actuating element includes a pressing part and an elastic part. The pressing part is connected with the sliding part through the elastic part. The pressing part includes a second positioning structure. The second positioning structure is detachably engaged with one of the plural first positioning structures.

Abstract: A fixing frame includes a base body and a turntable mechanism. The base body includes an annular wall, an accommodation structure and a push button. The accommodation structure has a first opening, a second opening and a third opening. The push button includes a pin, a pressing post, a positioning post, a retaining plate and a spring. The pin is penetrated through the first opening. The pressing post is penetrated through the second opening. The positioning post is penetrated through the third opening. The turntable mechanism includes plural fourth openings. When the pressing post is not depressed, the pin is inserted into one of the plural fourth opening, so that the turntable mechanism is fixed on the base body. After the pressing post is depressed and the pin is detached from the fourth opening, the turntable mechanism is rotatable relative to the base body.