| Patent application number | Description | Published |
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| 20080279240 | SEMICONDUCTOR LASER DRIVING UNIT AND IMAGE FORMING APPARATUS HAVING THE SAME - A semiconductor laser driving unit is disclosed that includes a first part generating a bias current; a second part generating a first current for causing the semiconductor laser to emit light, and outputting the first current to the semiconductor laser in accordance with an input control signal; a third part performing initialization to detect a light emission characteristic of the semiconductor laser, and causing the second part to generate a second current of a value obtained from the detected light emission characteristic; and a fourth part causing the second part to generate the first current in which a set offset current is added to the second current. The first part detects the amount of light emission of the semiconductor laser, and generates and outputs the bias current so that the amount of light emission produced by the sum of the bias current and the first current is a predetermined value. | 11-13-2008 |
| 20100290491 | LASER DIODE DRIVING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A disclosed laser diode driving device drives laser diodes with driving currents obtained by adding switch currents to corresponding bias currents and includes a common switch current generating circuit configured to generate a common switch current according to an input signal; switch current generating circuits provided for the corresponding laser diodes and configured to generate the switch currents based on the common switch current and input signals; switches configured to control the output of the switch currents to the corresponding laser diodes according to input signals; bias current generating circuits configured to generate the bias currents and output the generated bias currents to the corresponding laser diodes; and a control unit configured to detect the light intensities of the respective laser diodes and to control the common switch current generating circuit, the switch current generating circuits, and the switches to adjust the light intensities of the respective laser diodes. | 11-18-2010 |
| 20110216295 | SEMICONDUCTOR LASER DRIVER AND IMAGE FORMING APPARATUS INCORPORATING SAME - A semiconductor laser driver includes a light detection circuit to detect a quantity of light as a detected light emission intensity and output the detected light emission intensity to the control circuit, and a control circuit to control a light emission intensity for the semiconductor laser based on the detected light emission intensity and on a predetermined light emission intensity setting value. The light detection circuit includes a photoelectric conversion element to convert the quantity of light emitted from the semiconductor laser into an electrical current and output the converted electrical current, a current magnification setting circuit to amplify the electrical current output from the photoelectric conversion element to a predetermined amplified current at one of multiple different predetermined magnifications, a detection resistor to convert the amplified current output from the current magnification setting circuit into a voltage and output the voltage as the detected light emission intensity. | 09-08-2011 |
| 20110228034 | SEMICONDUCTOR LASER DRIVER AND IMAGE FORMING APPARATUS INCORPORATING SAME - A semiconductor laser driver to drive a semiconductor laser, the semiconductor laser includes a drive circuit to generate a drive current to cause the semiconductor laser to emit, and a current control circuit to cause the driving current to repeatedly increase and decrease in a predetermined cycle. | 09-22-2011 |
| 20110228036 | SEMICONDUCTOR LASER DRIVER AND IMAGE FORMING APPARATUS INCORPORATING SAME - A semiconductor laser driver to drive at least one semiconductor laser, the semiconductor laser including a storage device, an emission-intensity setting device, and a drive circuit. The storage device stores emission-intensity switching data to control light-emission intensity of the semiconductor laser, the emission-intensity setting device sets the light-emission intensity based on the emission-intensity switching data stored in the storage device, and, the drive circuit generates a driving current to drive the semiconductor laser based on the light-emission intensity set in the emission-intensity setting device. | 09-22-2011 |
| 20120027037 | SEMICONDUCTOR LASER DRIVE DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME - A semiconductor laser drive device includes a semiconductor-laser drive element to generate a drive current according to an input control signal to supply the drive current to a semiconductor laser, a control circuit to control the drive current by controlling the semiconductor-laser drive element, and a drive current detection circuit to detect a current value of the drive current supplied to the semiconductor laser and generate a digital control signal representing the detected digital value of the drive current to output. | 02-02-2012 |
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| 20090310001 | SOLID-STATE IMAGING DEVICE, DRIVING METHOD THEREOF, AND CAMERA - A solid-state imaging device which optimizes gains for each color without a need for complicated control of changing the resistance values of variable resistances and switching switches depending on pixels from which signals are to be read, while preventing an S/N deterioration in AD conversion. The solid-state imaging device comprises: a plurality of pixels arranged in a matrix; column amplifiers, each amplifying signals generated by pixels of a corresponding one of columns of the matrix; and column AD converters, each performing AD conversion on a signal generated by a corresponding one of the column amplifiers, wherein each of the plurality of pixels corresponds to a color among colors, and each of the column amplifiers amplifies output signals generated by all pixels of a corresponding one of the colors, among pixels of the corresponding column of the matrix. | 12-17-2009 |
| 20090322917 | SOLID-STATE IMAGING DEVICE - It is an object of the present invention to provide a solid-state imaging device capable of operating at high-speed, and suppressing the deterioration of image quality caused by coupling. A solid-state imaging device according to the present invention includes: pixels arranged in rows and columns; color filters each of which is arranged on a light incidence plane of a corresponding one of the pixels, each of the color filters being one of at least two colors; and column signal lines provided for each of the columns of the pixels, and each of which transmits the signals from the pixels in a column direction, in which one of the color filters is arranged on one of the pixels connected to the column signal line, and is of a same color as another one of the color filters arranged on another one of the pixels connected to the column signal line. | 12-31-2009 |
