Patent application number | Description | Published |
20080238330 | LIGHT EMITTING ELEMENT DRIVING CIRCUIT - A light emitting element driving circuit, which can achieve accurate/high-speed operation even at low voltage supply voltage, comprises: driving current supply, connected to light emitting element in series between first and second power supplies, to supply driving current to the light emitting element according to the voltage of control terminal; current determiner to determine and output the current according to an output light amount of the light emitting element; current/voltage converter to convert the determined current into voltage and output it to the control terminal of the driving current supply if control signal is in a first state, and to electrically shield its output voltage terminal from the control terminal of the driving current supply if the control signal is in a second state; and resetter to connect the control terminal of the driving current supply to the second power supply if the control signal is in the second state. | 10-02-2008 |
20080259229 | LIQUID CRYSTAL DISPLAY APPARATUS, METHOD OF CONTROLLING THE SAME, AND LIQUID CRYSTAL PROJECTOR SYSTEM - A liquid crystal display apparatus includes a display area in which pixels each having a switching element and electrode are arranged forming a matrix; a first scanning circuit to control whether the switching elements are turned on or off via first wires; a second scanning circuit to control whether an image signal generating circuit is electrically connected to or disconnected from second wires, and to assign image signals to the pixels via those wires; a discharging element to discharge the assigned image signals; a detecting circuit to detect reduction in a power supply voltage and to output a detection signal; and a control circuit to perform a controlling operation according to the signal so that the image signal generating circuit is electrically disconnected from the second wires, the switching elements are turned on, and the discharging element is caused to operate. | 10-23-2008 |
20090190047 | LIQUID CRYSTAL DISPLAY APPARATUS, DRIVE METHOD THEREOF, AND LIQUID CRYSTAL PROJECTION APPARATUS - A liquid crystal display apparatus includes: a plurality of pixels arranged in a matrix, each including a switching element connected to a pixel electrode for applying a voltage to a liquid crystal placed between the pixel electrode and a counter electrode; and a vertical scan circuit for supplying a scan signal for controlling the switch element between conducting and non-conducting states, and for scanning the pixels scan line by scan line sequentially, wherein the scan signal includes a first conducting signal setting the switch element at the conducting state, a second conducting signal setting the switch element at the conducting state following to the first conducting signal, and a non-conducting signal setting the switch element at the non-conducting state between the first and second conducting signals to suppress deterioration of the image quality owing to the parasitic capacitance coupling between pixel electrodes and a feedthrough between pixels. | 07-30-2009 |
20090262267 | ACTIVE MATRIX SUBSTRATE, REFLECTION TYPE LIQUID CRYSTAL DISPLAY APPARATUS AND LIQUID CRYSTAL PROJECTOR SYSTEM - An active matrix substrate for a reflection type liquid crystal display apparatus has an image display region | 10-22-2009 |
20120056629 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - A semiconductor integrated circuit device comprises: a circuit block formed on a semiconductor substrate; an electrically conductive pattern formed over a portion to be protected of the block; a resetting unit configured to reset a potential of a portion of the pattern to a reference potential; a connecting unit configured to connect the portion to a current supply line; and a detection circuit configured to determine whether a preset range includes a voltage of the portion when a predetermined time has elapsed since the portion is connected to the current supply line after the potential of the portion is reset to the reference potential is provided. A change in voltage of the portion depends on a circuit constant of the pattern. | 03-08-2012 |
20120056635 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - A semiconductor integrated circuit device including a semiconductor substrate having a first surface on which a circuit block is formed, and a second surface opposite to the first surface; a mounting board on which the semiconductor substrate is mounted; an electrically conductive pattern formed over a region of the mounting substrate, which overlaps a portion to be protected of the circuit block; and a detection circuit configured to detect that the electrically conductive pattern has been altered is provided. The semiconductor substrate is mounted on the mounting board such that the second surface of the semiconductor substrate faces the mounting board. | 03-08-2012 |
20120056639 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - A semiconductor integrated circuit device comprising: a circuit block formed on a semiconductor substrate; an electrically conductive pattern formed in an upper layer of a portion to be protected of the circuit block; an oscillation circuit connected to the electrically conductive pattern, and configured to oscillate at an oscillation frequency determined by a circuit constant of the electrically conductive pattern; and a detection circuit configured to determine whether a preset range includes the oscillation frequency of the oscillation circuit is provided. | 03-08-2012 |
20120249635 | LIQUID DISCHARGE HEAD AND LIQUID DISCHARGE APPARATUS - A liquid discharge head includes a signal processing circuit which operates with a first voltage, and generates a discharge control signal, a liquid driving circuit including an electrothermal transducer, a driving element which drives the electrothermal transducer, and a control circuit which receives the discharge control signal and outputs, to the driving element, a driving signal having a second voltage higher than the first voltage, and a monitoring circuit which monitors the first voltage and outputs a stop signal upon a drop of the first voltage. The control circuit stops driving the electrothermal transducer by the driving element in accordance with the stop signal. The monitoring circuit includes a transistor including a drain connected to power supply voltage node through a step-down circuit, a source connected to ground side, and a gate receiving the first voltage. | 10-04-2012 |
20130010033 | DRIVING CIRCUIT, LIQUID DISCHARGE SUBSTRATE, AND INKJET PRINTHEAD - A driving circuit which includes a plurality of MOS transistors electrically connected in parallel between a first node and a second node, and drives a load electrically connected between the first node and a third node by the plurality of MOS transistors, wherein the plurality of MOS transistors include at least two MOS transistors having channel lengths different from each other and thus having threshold voltages different from each other. | 01-10-2013 |
20130141483 | FLUID DISCHARGE HEAD SEMICONDUCTOR DEVICE, FLUID DISCHARGE HEAD, AND FLUID DISCHARGE APPARATUS - A fluid discharge head semiconductor device, comprising a terminal unit including first pad group including a plurality of pads, a processing unit configured to process input information from the first pad group, a printing unit including a plurality of printing elements configured to discharge a printing material in accordance with a result of the processing, and an inspection output unit including second pad group including at least one pad and an output buffer unit, wherein the processing unit outputs information on an inspection of an operation to the inspection output unit, and the inspection output unit drives the output buffer unit to output the information to the second pad group when performing an inspection, and suppresses the driving of the output buffer unit when performing printing. | 06-06-2013 |