Abstract: A power supply unit supplies power to a load, and the power supply unit includes a power factor corrector, a DC conversion module, and an isolated conversion module. The power factor corrector is plugged into a first main circuit board and converts an AC power into a DC power. The DC conversion module is plugged into the first main circuit board and converts the DC power into a main power. The isolated conversion module includes a bus capacitor, the bus capacitor is coupled to the DC conversion module through a first power copper bar, and coupled to the power factor corrector through a second power copper bar. The first power copper bar and the second power copper bar are arranged on a side opposite to the first main circuit board, and are arranged in parallel with the first main circuit board.

Abstract: A display device is configured to determine a target location. The display device includes a waveguide element, a display panel and a processor. The waveguide element is configured to receive an image and reflect the image to an eyeball location. The display panel is located at one side of the waveguide element. The display panel has a plurality of pixel units. The display panel is located between the waveguide element and the target location. The processor is electrically connected to the display panel. The processor is configured to determine the pixel units in a blocking area of the display panel to be opaque. The blocking area of the display panel overlaps the target location. The display panel displays the pixel units in the blocking area as grayscale according to the processor.

Abstract: A navigation keypad is disposed in an electronic device including a case and a keypad printed circuit board disposed in the case. The navigation keypad includes an elastic support element and a body. The elastic post includes an elastic post, and a first end of the elastic post has an inclined plane. The body is passing through the case and corresponding to the elastic support element. The body includes a direction keypad portion lean against the elastic post and providing a reload force. The direction keypad portions may be formed on the body for direction control. Therefore, the number of the components and the assembling hour of the navigation keypad can be reduced. In addition, the inclined plane allows the direction keypad portion to be closely in contact with the directional elastic post. Therefore, when one direction keypad portion is pressed, other direction keypad portion would not be affected.

Abstract: A navigation keypad is disposed in an electronic device including a case and a keypad printed circuit board disposed in the case. The navigation keypad includes an elastic support element and a body. The elastic post includes an elastic post, and a first end of the elastic post has an inclined plane. The body is passing through the case and corresponding to the elastic support element. The body includes a direction keypad portion lean against the elastic post and providing a reload force. The direction keypad portions may be formed on the body for direction control. Therefore, the number of the components and the assembling hour of the navigation keypad can be reduced. In addition, the inclined plane allows the direction keypad portion to be closely in contact with the directional elastic post. Therefore, when one direction keypad portion is pressed, other direction keypad portion would not be affected.