Abstract:
A keypad device including a parallel/serial conversion device, a keypad module, and a controller coupled to the parallel/serial conversion device and the keypad module. The keys in the keypad module are arranged in parallel. After the key is triggered, an interrupt signal will be fed to the controller. On receiving the interrupt signal, the controller will feed a drive voltage to the keypad module generating a parallel signal therein. After causing the parallel/serial conversion device to read and store the parallel signal, the controller will be able to read the parallel signal serially by using the clock signals. The status of the keypad module can thereby be obtained.
Abstract:
A method and apparatus for avoiding pressing inaccuracies on a touch panel. The touch panel includes a panel, a control module having an analog-to-digital converter (ADC) and a delay buffer, and a processor, the delay buffer able to buffer a trigger signal for interrupting the processor. The method includes sequentially receiving a plurality of analog signals generated by the panel when the panel is touched with the control module, transforming the plurality of analog signals into a plurality of corresponding digital signals and transmitting the plurality of digital signals to the processor with the analog-to-digital converter, neglecting a first m digital signals of the plurality of digital signals, and neglecting a last n digital signals of the plurality of digital signals, where m and n are integers with values equal to or larger than 1.
Abstract:
A dust-proof structure (200) for an electronic device is disclosed. The electronic device includes a case (208) having a slot (208a) aligned with a card connector (204) in the electronic device. The dust-proof structure includes a frame (212) formed on the case and around the slot, and a dust-proof gate (210) made of resilient material. The dust-proof gate is attached to the case at a position surrounded by the frame and covering the slot. The dust-proof gate has a slit (210a) positioned communicating with the slot, wherein the slit extends along a direction parallel to a longitudinal length of the slot. To insert an electronic card (202) into the electrical device to electrically connect with the card connector, the card is moved first through the slot of the case and then the slit of the dust-proof gate.
Abstract:
A touch-point detecting method is applicable to a resistive touch panel with a touch-point detecting apparatus comprising a plurality of switches. By selectively enabling and disabling those switches, the present method comprises the steps of determining whether an external force is exerted on the touch panel, determining whether the external force is within a predetermined threshold, producing X-coordinate, and producing Y-coordinate.
Abstract:
A personal digital assistant with static electricity preventing function, comprising: a metallic or electroplated chassis installed in the personal digital assistant serving as the grounding for the personal digital assistant; a touch panel module installed on the chassis; and a metallic shielding piece installed on the touch panel module and is equipped with a grounding section on the side, of which, the grounding section is connected to the chassis dispersing electrostatic charges, meanwhile, fixes the touch panel module firmly to the chassis.
Abstract:
A hand-held device. The hand-held device comprises a panel assembly, a cover, a speaker and a receiver. The cover, having a first surface facing the panel assembly and a second surface opposite to the first surface, is disposed on the panel assembly in a rotatable manner. The speaker is disposed on the first surface of the cover. The receiver is disposed on the second surface of the cover.
Abstract:
The invention is related a keystroke structure (3) for an electronic device which includes a shell (2) defining an opening (22). The keystroke structure comprises a cap (32) made of hard plastics such as ABS resin, a flange (34) fixed to a bottom of a periphery of the cap, wherein the flange is made of a material, such as rubber which is more elastic than that for forming the cap. The cap has a portion extending upward through the opening. A rod (42) extends downwardly from a bottom of the cap. A switch assembly (4) consisting of four first switches (44) for cursor direction control and a second switch (46) for nullenternull control. The first switches are activated by the rod when the cap is titled, and the second switch is activated by the rod when the cap is vertically depressed. When the cap is titled to activate one of the first switches, the flange engage with a bottom face of the shell. Since the flange is made of resilient material, the engagement thereof with the shell will not cause the second switch to be also activated when the cap is titled to activate one of the first switches. Such a design is particularly advantageous when the electronic device has a reduced thickness.
Abstract:
The invention is to provide a resetting device, of separable extensive accessory, connected between an portable device and an IC arranged in a separable extensive accessory, and it is characterized: by using a simple logic circuit, it is possible to complete the resetting action of the IC arranged on the extensive accessory when the connecting relationship between the separable extensive accessory and the portable device is changed.
Abstract:
A circuit board assembly with multiple cartridge slots adapted for use in a casing of an electronic product includes a circuit board, at least one first cartridge slot and at least one second cartridge slot. The first cartridge slot is located on a first side of the circuit board. The second cartridge slot is located on a second side of the circuit board. Through mounting the cartridge slots to both sides of the circuit board, utilization space for circuit board design can be increased. Also, both sides of the circuit board can function as heat-dissipating space for facilitating steady operation of circuits and elements located on the circuit board.