Active-matrix driving device, electrostatic capacitance detection device, and electronic equipment
Aspects of the invention are intended to stabilize the initial state of an active matrix so as to reduce unnecessary power consumption and stabilize the operation. The driving device can include a selection device that is coupled to any of a plurality of row direction lines and any of a plurality of column direction lines, and by which a selected state and a non-selected state of the row direction lines or the column direction lines are switched to each other. The driving device can also include a device that switches to the non-selected state that switches the selection device coupled to the row direction lines or the selection device coupled to the column direction lines to a non-selected state. Selection by the selection device can be implemented after the selection device is switched to a non-selected state by the device that switches to the non-selected state.
1. A driving device comprising:
a clocked NAND including a first reset signal input transistor, a second reset signal input transistor, and a first clocked inverter, a first electrode of the first reset signal input transistor being electrically connected to a voltage VDD, a second electrode of the first reset signal input transistor being electrically connected to an output terminal of the clocked NAND;
a clock line CLKBX line configured to provide a clock signal CLKBX to the first clocked inverter;
a clock line CLKX configured to provide a clock signal CLKX signal to the first clocked inverter; and
a reset line RST configured to provide a reset signal RST to a gate electrode of the first reset signal input transistor and a gate electrode of the second reset signal input transistor, the first reset signal input transistor being active when the reset signal RST is at low level, the second reset signal input transistor being non-active when the reset signal RST is at low level, and an output voltage from the output terminal of the clocked NAND being at high level when the reset signal RST is at low level.
2. The driving device according to claim 1 , further comprising:
an inverter configured to provide an inverter signal IN to the clocked inverter of the clocked NAND, the inverter changes the level of the output voltage from high level to low level when the reset signal RST is at low level.
3. The driving device according to claim 2 , further comprising:
a second clocked inverter configured to be coupled to the clocked NAND and the inverter to compose one stage of a shift register.
4. The driving device according to claim 1 , the output voltage generated from the clocked NAND being at high level regardless of level of the input inverter signal IN when the reset signal RST is at low level.
5. The driving device according to claim 1 , the first reset signal input transistor being non-active when the reset signal RST is at high level, the second reset signal input transistor being active when the reset signal RST is at high level.
6. The driving device according to claim 1 , further comprising:
a driving device line SPX configured to provide a driving device signal SPX to the second clocked inverter.
7. The driving device according to claim 1 , further comprising:
a reset signal generator configured to provide the reset signal RST to the clocked NAND via the reset line RST.
8. An active matrix device including the driving device according to claim 1 , comprising:
a shift register having a plurality of stages, each of the plurality of stages including the clocked NAND and the inverter according to claim 1 ;
a plurality of data lines configured such that the shift register controlled the plurality of data lines; and
a plurality of scan lines intersecting the plurality of data lines.
9. The active matrix device according to claim 8 , comprising:
a plurality of electrostatic capacitance detection circuits disposed corresponding to a plurality of intersections between the plurality of data lines and the plurality of scan lines.
10. The active matrix device according to claim 9 , comprising:
an amplification circuit configured to amplify a plurality of detection signals from the plurality of electrostatic capacitance detection circuits.
11. The active matrix device according to claim 10 , the amplification circuit including a current mirror circuit.