JP2007022069A5 - - Google Patents

Claims (20)

A plurality of arranged recording elements;
A voltage conversion circuit for converting a voltage input from the outside,
The voltage conversion circuit includes a reference voltage generation unit and a voltage conversion unit,
An element substrate of a recording head, wherein the voltage conversion unit is composed of a plurality of voltage conversion elements arranged in a dispersed manner. A driver transistor for driving the recording element;
A logic circuit for selecting the recording element to be driven based on image data;
A booster circuit that boosts a voltage signal output from the logic circuit and supplies the boosted signal to the driver transistor;
The voltage conversion circuit generates an intermediate voltage having a potential between a drive voltage of the recording element and a power supply voltage of the logic circuit as at least a power supply voltage of the booster circuit. An element substrate of the recording head.   The arrangement direction of the plurality of recording elements is a longitudinal direction of an elongated hole-shaped ink supply port that is provided on the element base and supplies ink. From the ink supply port, the recording element, the driver transistor, and The print head element substrate according to claim 2, wherein the print circuit element base is arranged in the order of the logic circuits along the arrangement direction.   4. The element base of a recording head according to claim 1, wherein the reference voltage generation unit is disposed so as to extend in a direction intersecting with the arrangement direction. 5.   5. The voltage conversion element according to claim 1, wherein one voltage conversion element is arranged for each group of the plurality of recording elements adjacent to each other in a predetermined number. 6. Element base of recording head.   The boost circuit is provided corresponding to each recording element of the plurality of recording elements, and is arranged along the arrangement direction between the driver transistor and the logic circuit. 4. An element substrate of a recording head according to item 3. The logic circuit includes a logic circuit operating at a high voltage driven by the intermediate voltage;
The booster circuit is provided for each group, elements of the recording head according to claim 2 or 3 wherein the high voltage the is arranged along the arrangement direction on the outside of the logic circuit operating at, characterized in that Substrate.   The plurality of voltage conversion elements are distributed and disposed in a region where at least one of the driver transistor, the booster circuit, and the logic circuit is disposed. 8. An element substrate of a recording head according to any one of 7 above.   The element base of a recording head according to claim 1, wherein the voltage conversion element is a MOSFET.   9. The element base of a recording head according to claim 1, wherein the voltage conversion element is a bipolar transistor.   9. The element base of a print head according to claim 1, wherein the voltage conversion element is a diode.   The element base of a recording head according to claim 1, wherein the reference voltage generation unit includes a resistance element.   The element base of a recording head according to claim 12, wherein the resistance element is made of polysilicon.   The element base of a recording head according to claim 1, wherein the voltage conversion circuit has a load between the voltage conversion element and a ground.   15. The element base of a recording head according to claim 14, wherein a plurality of the loads are also distributed and arranged corresponding to the plurality of voltage conversion elements arranged in a distributed manner.   The element base of the recording head according to claim 14, wherein the load includes a resistance element.   The element base of a recording head according to any one of claims 1 to 16, wherein the recording element includes a heating element that imparts thermal energy to the ink. A recording head element base according to any one of claims 1 to 17,
A recording head, characterized in that an ejection port for ejecting ink is provided corresponding to each of the recording elements. A recording head according to claim 18;
And a control unit for transmitting the image data to the recording head. A recording head element base according to any one of claims 1 to 17,
The recording head is provided with ejection openings for ejecting ink corresponding to the recording elements,
A recording head cartridge, further comprising: an ink container for holding ink for supplying ink to the recording head.