Abstract: A contact detection device includes a number of first bars and second bars. Each first bar includes a number of first sheets. Each second bar includes a number of second sheets. The first bars and the second bars intersect to form a grid with a number of nodes as a contact detection area, each node having exclusive coordinates. Each first sheet defines a light hole, and the light holes are arranged in the same column line in the grid. Opposite sides of each first sheet arranges one photosensitive member above the corresponding light hole, and position of each photosensitive member is determined according to the coordinates of the nearest node in a predetermined direction. Opposite ends of each two adjacent second bars respectively arrange one light emitter therebetween. When one point of the grid is pressed, the light emitted by the light emitter irradiates the photosensitive member.

Abstract: A keyboard includes a plurality of keys. Each key includes a base, a key cap detachably connected to the base and includes at least two conductors, a flexible element connected between the key cap and the base, and a plurality of conduct lines mounted on the base. The conduct lines are not contacting each other. One end of each conduct line is connected to a processing unit. Each conduct line is assigned a code. If the key cap of one key is pressed, the conductors of the key contacts the conduct lines, thereby creating an electrical connection between the two conduct lines, and generating an electrical signal. The processing unit determines the function of the key according to the codes of the connected conduct lines.

Abstract: A contact detection device includes a number of first bars and second bars. Each first bar includes a number of first sheets. Each second bar includes a number of second sheets. The first bars and the second bars intersect to form a grid with a number of nodes as a contact detection area, each node having exclusive coordinates. Each first sheet defines a light hole, and the light holes are arranged in the same column line in the grid. Opposite sides of each first sheet arranges one photosensitive member above the corresponding light hole, and position of each photosensitive member is determined according to the coordinates of the nearest node in a predetermined direction. Opposite ends of each two adjacent second bars respectively arrange one light emitter therebetween. When one point of the grid is pressed, the light emitted by the light emitter irradiates the photosensitive member.

Abstract: A keyboard includes a number of buttons, a pedestal, and a processing unit. When sliding on different buttons sequentially by an object such as a figure, the processing unit determines the sliding track and generates signals corresponding to the sliding track to control a cursor displayed on a computer communicating with the keyboard. The keyboard further generates signals to control the computer to execute a left click function and a right click function when an special button is pressed. The present disclosure also provided an input method of the keyboard.

Abstract: A multifunctional optical mouse includes a first light sources, a second light source, an orientation detecting unit, a transparent touch input area, an imaging unit and a processing unit. The second light source is arranged along a side of the transparent touch input area. The system includes a multifunctional optical mouse, and a computer. The system is switched between a mouse mode and a touch input mode according to the orientation of the mouse. The present disclosure also provides an input method applied in the computer system.

Abstract: A keyboard includes a plurality of keys. Each key includes a base, a key cap detachably connected to the base and includes at least two conductors, a flexible element connected between the key cap and the base, and a plurality of conduct lines mounted on the base. The conduct lines are not contacting each other. One end of each conduct line is connected to a processing unit. Each conduct line is assigned a code. If the key cap of one key is pressed, the conductors of the key contacts the conduct lines, thereby creating an electrical connection between the two conduct lines, and generating an electrical signal. The processing unit determines the function of the key according to the codes of the connected conduct lines.

Abstract: A portable electronic device includes a main body and a card connector assembly mounted inside of the main body. The card connector assembly includes a base including a protrusion and a protrusion plate, a cover, and a movable plate. The protrusion includes a plurality of contacts. The protrusion plate includes an electromagnet. The cover is rotatably connected to the base, and includes a retaining member for retaining an electronic card. The movable plate is slidably connected to the protrusion plate, and is made of magnetic material. When in use, the cover is rotated until the electronic card contacts the contacts, the electronic device controls to power for the electromagnet, the electromagnet generates a magnetic field which drives the movable plate to slide toward the protrusion along the protrusion plate until the movable plate moves below the cover to prevent the cover from rotating in one direction.