Abstract: A keyswitch with force feedback function includes a vibrating source, a switching circuit and a controller. The vibrating source is connected to a cap of the keyswitch. The switching circuit is switched on according to states of the keyswitch. The controller is electrically connected to the vibrating source and the switching circuit. When the switching circuit is switched on, the controller outputs a first driving signal to the vibrating source, and the vibrating source transmits a pressing vibration to the cap of the keyswitch. A period of the first driving signal is smaller than or equal to a predetermined period, a user can feel vibration of the keyswitch due to the pressing vibration.

Abstract: A peripheral device comprises a control unit and an operating body. The operating body electrically coupled to the control unit comprises a keyboard layout layer, a capacitance sensing layer and a resistance sensing layer. The keyboard layout layer shows a keyboard layout to be operated. The capacitance sensing layer disposed beneath the keyboard layout layer is capable to detect a finger contact and generate a contact path according to the finger contact. The resistance sensing layer, which is disposed under the keyboard layout layer, stacked with the capacitance sensing layer, is capable to detect a pressing operation on the keyboard layout layer and generates a press signal according to the pressing operation.

Abstract: A keyboard capable of generating a tactile feedback signal makes use of acceleration change of pressing behavior and releasing behavior of a physical keyswitch during pressing and releasing stages. The acceleration change is modulated according to a touch sensitive frequency response in various ways so that a simulated tactile feedback may be generated on the keyswitches of the keyboard.

Abstract: A keyswitch with force feedback function includes a vibrating source, a switching circuit and a controller. The vibrating source is connected to a cap of the keyswitch. The switching circuit is switched on according to states of the keyswitch. The controller is electrically connected to the vibrating source and the switching circuit. When the switching circuit is switched on, the controller outputs a first driving signal to the vibrating source, and the vibrating source transmits a pressing vibration to the cap of the keyswitch. A period of the first driving signal is smaller than or equal to a predetermined period, a user can feel vibration of the keyswitch due to the pressing vibration.

Abstract: An iridium complex is used as a phosphorescent material in an organic electroluminescence (OEL). Use this complex as the red light guest dopant emitter of the phosphorescent material, then apply the phosphorescent material to the OEL light-emitting layer, a red light that is very close to pure red can be achieved. In addition, the iridium complex can increase the thermal stability of the OEL, due to their high conjugated structure.