Abstract:
A light-emitting chip includes: a substrate; plural light-emitting elements arrayed in line on the substrate, each of the light-emitting elements including a light-emitting region having a length in an array direction of the array different from a length in a direction orthogonal to the array direction; and a light-up current supplying interconnection including plural connecting portions, each of the connecting portions being provided on the light-emitting region of a corresponding one of the light-emitting elements in a shorter direction of the light-emitting region either the array direction or the direction orthogonal to the array direction, each of the connecting portions being connected to an electrode provided on the light-emitting region, the light-up current supplying interconnection supplying a current for lighting up to the plural light-emitting elements through the plural connecting portions.
Abstract:
The light-emitting chip includes: a substrate; plural light-emitting thyristors each having a pnpn structure formed of a first stacked-semiconductor layer in which at least 4 semiconductor layers having different conductivity types and including the substrate are stacked on the substrate; a lower wiring that is formed of a second stacked-semiconductor layer in which at least 3 semiconductor layers having different conductivity types and including the substrate are stacked on the substrate, and that has a semiconductor layer between the substrate and an uppermost semiconductor layer of the second stacked-semiconductor layer, the semiconductor layer having a fixed potential so that any one of p-n junctions between the substrate and the uppermost semiconductor layer is reversely biased with respect to potentials respectively applied to the substrate and the uppermost semiconductor layer; and an upper wiring provided on the lower wiring so as to intersect with the lower wiring through an isolation layer.
Abstract:
An image forming apparatus including plural capacitive loads, with one terminal of each of the capacitive loads being connected to a common electrode and with each of the capacitive loads being charged/discharged on the basis of image data, and a first and second drive circuits is provided. The first drive circuit includes plural charge/discharge controllers that are individually connected to other terminals of the capacitive loads and individually control the charging and discharging of the capacitive loads and first and second electrical power wires that are connected to the charge/discharge controllers and charge and discharge the capacitive loads via the charge/discharge controllers. The second drive circuit is connected to each of the first and second electrical power wires and adjusts charge resistance and discharge resistance in response to control of the charge/discharge controllers.
Abstract:
There is provided a capacitive load driving circuit connected to a capacitive load that causes ejection, from an ejecting nozzle, of a liquid droplet of a droplet amount that corresponds to a voltage level of charging voltage, the capacitive load driving circuit including: a first line that is connected to the capacitive load and that applies the charging voltage to the capacitive load; a power source line carrying dc voltage that is supplied from a power source for driving of the capacitive load; a charging control signal line that controls a voltage level of the charging voltage with respect to the capacitive load; and an N-type electric field effect transistor to whose source the first line is connected, and to whose drain the power source line is connected, and to whose gate the charging control signal line is connected.
Abstract:
A droplet ejecting component of the present invention includes an ejecting component having a charge and discharge characteristic, an applying component being provided with a transistor, and an increasing component. The ejecting component ejects a droplet. When a control signal is inputted, the applying component applies an application voltage to the ejecting component, and the increasing component increases the impedance of the transistor.
Abstract:
A droplet ejecting component of the present invention includes an ejecting component having a charge and discharge characteristic, an applying component being provided with a transistor, and an increasing component. The ejecting component ejects a droplet. When a control signal is inputted, the applying component applies an application voltage to the ejecting component, and the increasing component increases the impedance of the transistor.
Abstract:
There is provided a capacitive load driving circuit connected to a capacitive load that causes ejection, from an ejecting nozzle, of a liquid droplet of a droplet amount that corresponds to a voltage level of charging voltage, the capacitive load driving circuit including: a first line that is connected to the capacitive load and that applies the charging voltage to the capacitive load; a power source line carrying dc voltage that is supplied from a power source for driving of the capacitive load; a charging control signal line that controls a voltage level of the charging voltage with respect to the capacitive load; and an N-type electric field effect transistor to whose source the first line is connected, and to whose drain the power source line is connected, and to whose gate the charging control signal line is connected.
Abstract:
The light-emitting element chip includes: a substrate; a light-emitting portion including plural light-emitting elements each having a first semiconductor layer that has a first conductivity type and that is stacked on the substrate, a second semiconductor layer that has a second conductivity type and that is stacked on the first semiconductor layer, the second conductivity type being a conductivity type different from the first conductivity type, a third semiconductor layer that has the first conductivity type and that is stacked on the second semiconductor layer, and a fourth semiconductor layer that has the second conductivity type and that is stacked on the third semiconductor layer; and a controller including a logical operation element that performs logical operation for causing the plural light-emitting elements to perform a light-emitting operation, the logical operation element being formed by combining some sequential layers of the first, second, third and fourth semiconductor layers.
Abstract:
An image forming apparatus including plural capacitive loads, with one terminal of each of the capacitive loads being connected to a common electrode and with each of the capacitive loads being charged/discharged on the basis of image data, and a first and second drive circuits is provided. The first drive circuit includes plural charge/discharge controllers that are individually connected to other terminals of the capacitive loads and individually control the charging and discharging of the capacitive loads and first and second electrical power wires that are connected to the charge/discharge controllers and charge and discharge the capacitive loads via the charge/discharge controllers. The second drive circuit is connected to each of the first and second electrical power wires and adjusts charge resistance and discharge resistance in response to control of the charge/discharge controllers.
Abstract:
A driving device drives a recording head in which droplet ejection portions are plurally arrayed. The droplet ejection portions include actuating elements which are driven in accordance with driving signals such that droplets are ejected. The driving device is provided with a standard waveform generation section, a voltage amplification section, a plurality of current amplification sections and a selection section. Output terminals of the current amplification sections are commonly connected. The selection section selects at least one of the plurality of current amplification sections, in accordance with the number of the actuating elements to be driven concurrently or a printing density of an image to be printed by the recording head. The selection section inputs a driving signal, whose voltage component has been amplified by the voltage amplification section, to input terminal(s) of the selected current amplification section(s).