Transmission-type electronic pen

A transmission-type electronic pen used with a position detecting device, the transmission-type electronic pen comprising:

• a tubular casing;
• a core body arranged in the casing such that a tip thereof protrudes to externally extend from one opening of the casing;
• a supply source of a source voltage arranged in the casing;
• a transmission circuit that transmits a signal to the position detecting device;
• a detector configured to detect a direct act of a user to the casing, serving as a trigger for start of use of the transmission-type electronic pen;
• a pressure detector configured to detect whether a pressure is being applied to the tip of the core body;
• and
• a controller configured to activate the transmission circuit and control a transmission operation of the transmission circuit based on a detection output of the detector and a detection output from the pressure detector,
• wherein the transmission circuit is controlled to be in any of a plurality of operation states including at least:
• a first transmission operation state, which is a normal transmission operation state in which the transmission circuit operates in normal power consumption to transmit the signal to the position detecting device, and
• a second transmission operation state, which is a power saving transmission operation state in which the transmission circuit operates in lower power consumption to transmit the signal to the position detecting device, and
• a sleep state in which signal transmission from the transmission circuit is stopped,
• the controller, when the transmission circuit is in the sleep state and in response to a detection output from the pressure detector indicative of a pressure applied to the tip of the core body, controls the transmission circuit to transition from the sleep state to the first transmission operation state, and
• the controller, when the transmission circuit is in the sleep state and in response to a detection output from the detector indicative of a direct act of the user to the casing, controls the transmission circuit to transition from the sleep state to the second transmission operation state and, when the transmission circuit is in the second transmission operation state and in response to a detection output from the pressure detector indicative of a pressure applied to the tip of the core body, controls the transmission circuit to transition from the second transmission operation state to the first transmission operation state.