Low power consumption electronic mouse device
View Patent ↗Provided is a convenient mouse device having low power consumption. The mouse device has a configuration in which an optical sensor for light shielding detection is provided in a region where a hand blocks light when the hand handles the mouse device so that the mouse device may perform a normal operation when the optical sensor for light shielding detection is shielded from light, and may perform a low consumption operation when the optical sensor for light shielding detection is not shielded from light.
1. A mouse device, which is provided with a plurality of operation modes,
the plurality of operation modes including:
a normal operation of converting a movement amount into an electrical signal and outputting the electrical signal; and
a low consumption operation in which power consumption is smaller than power consumption in the normal operation,
the mouse device comprising light detection means, the light detection means comprising:
a p-n junction element for charging a second node in accordance with an amount of incident light;
a second constant current circuit for discharging the second node;
a depletion type N-channel MOS transistor for discharging a first node with an ON-state current of the depletion type N-channel MOS transistor, the depletion type N-channel MOS transistor including:
a gate to which a voltage of a reference power supply terminal is input; and
a source to which a voltage of the second node is input;
a first P-channel MOS transistor for charging an output terminal with an ON-state current of the first P-channel MOS transistor through a third constant current circuit, the first P-channel MOS transistor including a gate to which a voltage of the first node is input;
an N-channel MOS transistor for discharging the output terminal with an ON-state current of the N-channel MOS transistor, the N-channel MOS transistor including a gate to which the voltage of the second node is input; and
a second P-channel MOS transistor for charging the first node with an ON-state current of the second P-channel MOS transistor through a first constant current circuit, the second P-channel MOS transistor including a gate to which a voltage of the output terminal is input,
the mouse device switching the plurality of operation modes based on an output of the light detection means.
2. A mouse device according to claim 1 , wherein the light detection means is installed in a region where a hand blocks light when the hand handles the mouse device, and detects the mouse device as being handled.
3. A mouse device according to claim 1 , wherein the light detection means is installed in a region where a hand does not block light when the hand handles the mouse device, and detects ambient brightness.
4. A mouse device according to claim 1 , wherein the light detection means comprises:
first light detection means which is installed in a region where a hand blocks light when the hand handles the mouse device, for detecting the mouse device as being handled; and
second light detection means which is installed in a region where the hand does not block light when the hand handles the mouse device, for detecting ambient brightness.
5. A mouse device according to claim 1 , further comprising a switch for allowing the mouse device to perform the normal operation all the time.
6. A mouse device provided with a plurality of operation modes including a normal operation mode of converting a movement amount into an electrical signal and outputting the electrical signal and a low consumption operation mode in which power consumption is smaller than power consumption in the normal operation, the mouse device comprising:
a light detection means comprising:
a p-n junction element for charging a second node in accordance with an amount of incident light;
a second constant current circuit for discharging the second node;
a depletion type N-channel MOS transistor for discharging a first node with an ON-state current of the depletion type N-channel MOS transistor, the depletion type N-channel MOS transistor including:
a gate to which a voltage of a reference power supply terminal is input; and
a source to which a voltage of the second node is input;
a first P-channel MOS transistor for charging an output terminal with an ON-state current of the first P-channel MOS transistor through a third constant current circuit, the first P-channel MOS transistor including a gate to which a voltage of the first node is input;
an N-channel MOS transistor for discharging the output terminal with an ON-state current of the N-channel MOS transistor, the N-channel MOS transistor including a gate to which the voltage of the second node is input; and
a second P-channel MOS transistor for charging the first node with an ON-state current of the second P-channel MOS transistor through a first constant current circuit, the second P-channel MOS transistor including a gate to which a voltage of the output terminal is input; and
a control means for switching the plurality of operation modes based on an output of the light detection means.
7. A mouse device according to claim 6 , wherein the light detection means is installed in a region where a hand blocks light when the hand handles the mouse device, and detects the mouse device as being handled.
8. A mouse device according to claim 6 , wherein the light detection means is installed in a region where a hand does not block light when the hand handles the mouse device, and detects ambient brightness.
9. A mouse device according to claim 6 , further comprising a switch for allowing the mouse device to perform the normal operation all the time.
10. A mouse device provided with a plurality of operation modes including a normal operation mode of converting a movement amount into an electrical signal and outputting the electrical signal and a low consumption operation mode in which power consumption is smaller than power consumption in the normal operation, the mouse device comprising:
a light detection means comprising:
first and second circuit nodes;
a p-n junction element for charging the second node in accordance with an amount of incident light;
a second constant current circuit for discharging the second node;
a depletion type N-channel MOS transistor connected between the second node and the first node,
a first P-channel MOS transistor for charging an output terminal with an ON-state current of the first P-channel MOS transistor through a third constant current circuit, the first P-channel MOS transistor comprising a gate connected to the first node;
an N-channel MOS transistor for discharging the output terminal with an ON-state current of the N-channel MOS transistor, the N-channel MOS transistor comprising a gate connected with the second node; and
a second P-channel MOS transistor for charging the first node with an ON-state current of the second P-channel MOS transistor through a first constant current circuit, the second P-channel MOS transistor comprising a gate connected to the output terminal; and
a control means for switching the plurality of operation modes based on an output of the light detection means.
11. A mouse device according to claim 10 , wherein the light detection means is installed in a region where a hand blocks light when the hand handles the mouse device, and detects the mouse device as being handled.
12. A mouse device according to claim 10 , wherein the light detection means is installed in a region where a hand does not block light when the hand handles the mouse device, and detects ambient brightness.
13. A mouse device according to claim 10 , further comprising a switch for allowing the mouse device to perform the normal operation all the time.