Game controller
View Patent ↗A technique which easily removes the motion element of the game controller which is attributed to the vibrating motion of a vibrator from the output data of an acceleration sensor or reduces the element can be achieved by the present invention. In a game controller, an acceleration sensor detects the movement of the game controller. LPF is installed at the output of the acceleration sensor. Vibrators are installed inside of a housing. The cutoff frequency of LPF is set lower than the peak value of the natural frequency of the game controller. The cutoff frequency of LPF may be set to two thirds or less of the peak value of the natural frequency of the game controller.
1. A game controller operative to transmit game operation data to a game device, comprising:
a housing;
a motion sensor operative to detect a movement of the game controller;
a low pass filter installed at an output of the motion sensor; and
at least one vibrator which is driven by a vibration controlling signal sent from the game device,
wherein the motion sensor, the low pass filter and the at least one vibrator are placed inside the housing, the at least one vibrator being fixed to the housing,
a cutoff frequency of the low pass filter is set lower than a natural vibration frequency of the game controller, wherein the cutoff frequency of the low pass filter is set so that at least a part of a vibration component of the housing attributed to a vibrating motion of the vibrator can be removed, while the movement of the controller caused by a movement of a user can be output from the low pass filter, and
wherein the cutoff frequency of the low pass filter is set with reference to a duration of transmission cycle of game operation data.
2. The game controller according to claim 1 , wherein the cutoff frequency of the low pass filter is set to two thirds or less of a peak value of the natural vibration frequency of the game controller.
3. The game controller according to claim 1 , wherein the low pass filter is configured so that filter circuits which have different cutoff frequencies can be selectively used.
4. The game controller according to claim 1 , wherein the natural vibration frequency of the game controller is approximately 22 Hz and the cutoff frequency of the low pass filter is set to a predetermined value of 15 Hz or less.
5. The game controller according to claim 1 , further comprising:
a wireless communication module operative to transmit an output data of the motion sensor at a predetermined cycle, wherein
a lag time caused by the low pass filter is set shorter than twice a duration of transmission cycle of the wireless communication module.
6. The game controller according to claim 5 wherein the lag time caused by the low pass filter is set shorter than the duration of transmission cycle of the wireless communication module.
7. The game controller according to claim 1 , further comprising;
a wireless communication module operative to transmit an output data of the motion sensor at a predetermined cycle;
another low pass filter installed between the motion sensor and the low pass filter, wherein
a lag time caused by the low pass filters in two stages is set shorter than twice a duration of transmission cycle of the wireless communication module.
8. The game controller according to claim 7 wherein the lag time caused by each of the low pass filters which constitute a two-stage low pass filter is set shorter than the duration of transmission cycle of the wireless communication module.
9. The game controller according to claim 1 , wherein
the motion sensor includes at least one acceleration sensor and an angular velocity sensor, further comprising:
a passive filter installed between the acceleration sensor and the low pass filter; and
an active filter installed between the angular velocity sensor and the low pass filter.