1. An inkjet printhead comprising;
a plurality of sets each of which includes a nozzle to eject ink, a pressure chamber communicating with the nozzle, and an actuator to apply force to elect the ink in the pressure chamber through the nozzle, wherein the sets are two-dimensionally arrayed;
a circuit board including:
plurality of wires each connected to the actuator of each set;
plurality of through hole vias each connected to a corresponding wire; and
ink channels each supplying the ink to the pressure chamber of each set; and
a connection member to connect the wires to a driving unit, the connection member being provided outside of an array area, the array area being an area where all of the sets of the inkjet printhead are two-dimensionally arrayed,
wherein the nozzles are arranged linearly to form nozzle rows, and the number of the nozzles in each of the nozzle rows is M, wherein M is an integer of 2 or more;
wherein the number of the nozzle rows is N, wherein N is an integer of 2 or more;
wherein the through hole via corresponding to each of the nozzles of n nozzle row of the N nozzle rows is provided inside of the array area, wherein n is any integer satisfying 1\u2266n<N; and
wherein the through hole via corresponding to each of the nozzles of the N nozzle rows except the a nozzle row is provided outside of the array area, and
wherein the connection member is disposed between the through hole via corresponding to each of the nozzles of n nozzle row of the N nozzle rows and the through hole via corresponding to each of the nozzles of the N nozzle rows except the n nozzle row.
2. The inkjet printhead according to claim 1,
wherein N is an even number of 2 or more;
wherein the wire connected to the through hole via corresponding to each of the nozzles of the 1st to (N2)th nozzle rows is led to the outside of the array area on a 1st nozzle row side;
wherein the wire connected to the through hole via corresponding to each of the nozzles of the (N2)+1th to Nth nozzle rows is led to the outside of the array area on a Nth nozzle row side;
wherein among the nozzles of the 1st to (N2)th nozzle rows, the through hole via corresponding to each of the nozzles of \u03b1 nozzle rows is provided outside of the array area, wherein \u03b1 is any integer satisfying 1\u2266\u03b1<N2; and
wherein among the nozzles of the (N2)+1th to Nth nozzle rows, the through hole via corresponding to each of the nozzles of \u03b2 nozzle rows is provided. outside of the array area, wherein \u03b2 is any integer satisfying 1\u03b2<N2.
3. The inkjet printhead according to claim 2,
wherein the through hole via corresponding to each of the nozzles of the \u03b1 nozzle rows is provided outside of the array area on the 1st nozzle row side; and
wherein the through hole via corresponding to each of the nozzles of the \u03b2 nozzle rows is provided outside of the array area on the Nth nozzle row side.
4. The inkjet printhead according to claim 2,
wherein the connection member includes a first connection member and a second connection member, the first. connection member being provided outside of the array area on the 1st nozzle row side on one surface of the circuit board, the second connection member being provided outside of the array area on the Nth nozzle row side on the one surface of the circuit board;
wherein the wire connected to the through hole via corresponding to each of the nozzles of the 1st to (N2)th nozzle rows is connected to the first connection member; and
wherein the wire connected to the through hole via, corresponding to each of the nozzles of the (N2)+1th to Nth nozzle rows is connected to the second connection member.
5. The inkjet printhead according to claim 4,
wherein the through hole via corresponding to each of the nozzles of the \u03b1 nozzle rows is provided on a far side of the first connection member with the first connection, member disposed between the array area and the through hole via corresponding to each of the nozzles of the \u03b1 nozzle rows; and
wherein the through hole via corresponding each of to the nozzles of the \u03b2 nozzle rows is provided on a far side of the second connection member with the second connection member disposed between the array area and the through hole via corresponding to each of the nozzles of the \u03b2 nozzle rows.
6. The inkjet printhead according to claim 1,
wherein the number of the through hole via provided inside of the array area is the same as the number of the through hole via provided outside of the array area.
7. The inkjet printhead according to claim 1,
wherein the number of the through hole via provided inside of the array area is larger than the number of the through hole via provided outside of the array area.
8. The inkjet printhead according to claim 1, further comprising:
a bonding member having a communicating channel that allows the ink channel, to communicate with the pressure chamber, the bonding member being provided on a surface of the circuit board, the surface being opposite to a surface on which the connection member is provided,
wherein the wire connected to the through hole via outside of the array area is disposed outside a portion where the bonding member is joined to the circuit board.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A lighting fixture comprising:
a color wheel;
a driver mechanism for selectively rotating the color wheel at a first speed and a second speed, the second speed being faster than the first speed;
a position sensor for generating a reference position pulse when the color wheel is at a predetermined position;
a circuit for periodically generating a master pulse; and
a control device for causing the driver mechanism to rotate the color wheel at the second speed when the reference position pulse is generated after the master pulse.
2. A lighting fixture comprising:
a color-changing mechanism for cycling through a plurality of colors at a first speed and a second speed, the second speed being faster than the first speed;
a position pulse device for generating a reference position pulse when the color-changing mechanism is at a predetermined color;
a circuit for periodically generating a master pulse; and
a control device for causing the color-changing mechanism to cycle through the colors at the second speed when the reference position pulse is generated after the master pulse.