Patent application number | Description | Published |
20080220347 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An LD switch is turned ON to output image data outputted from an image processing section to a laser diode, and to irradiate a laser light to a photosensitive drum. The number of pixel dots included in the image data outputted from the image processing section is computed by line basis to detect an image density based on the total sum of the pixel dots of each color at a timing when the image data of Nth line is outputted from the image processing section. The detected image density is compared with a threshold value to turn OFF the LD switch at a timing when the image data of (N+α)th line is outputted when the image density is greater than the threshold value. This suppresses a variation in a rear-end-void length due to sheet slippage. | 09-11-2008 |
20080226361 | Image forming apparatus with image adjusting function, image adjusting method and image adjusting program - An image forming apparatus with an image adjusting function using a adjustment patterns transferred on an endless belt including; a calculation unit that obtains, based on the measured positions of the adjustment patterns, a deviation in a rotating direction and/or in a width direction, respectively; and an adjustment unit that adjusts an image to be formed based on each obtained deviation, the adjustment patterns including a first oblique pattern obliquely intersecting with one straight line extending in the width direction of the endless belt in a right front direction and a second oblique pattern obliquely intersecting with the line in a left front direction, the calculation unit obtaining the deviation in the rotating direction from an average of the deviations of the first and second oblique pattern in the rotating direction and obtaining the deviations of the first and second oblique pattern in the width direction, respectively. | 09-18-2008 |
20090080914 | IMAGE PROCESSING APPARATUS AND IMAGE FORMING APPARATUS - A sub CPU of an image forming section forms a toner image based on test line data on an intermediate transfer belt, detects an inclination of the formed toner image for each color component, calculates an adjustment indicative value for correcting the detected inclination for each color component, and outputs the adjustment indicative values to the BK adjusting section, C adjusting section, M adjusting section, and Y adjusting section, respectively, of an inclination adjusting section. The BK adjusting section, C adjusting section, M adjusting section, and Y adjusting section generate, based on the respective adjustment indicative values obtained from the sub CPU, adjustment amounts for an inclination adjustment process to be executed on image data, execute the inclination adjustment process based on the generated adjustment amounts, and output the obtained image data to the respective LDs of an exposure unit. | 03-26-2009 |
20090123181 | IMAGE FORMING APPARATUS - There is provided an image forming apparatus that includes couplings for photoreceptor drums, couplings for waste toner transporting screws, and couplings for developing rollers, that transmit driving force to each of a plurality of driving shafts for driving a process portion that performs image formation by an electrophotographic method, and a plurality of coupling attaching/detaching members for attaching/detaching the plurality of coupling members, so as to drive the process portion. In the image forming apparatus, the plurality of coupling attaching/detaching members are provided so as to be movable independently, and the image forming apparatus includes a coupling attaching/detaching member driving mechanism that operates the coupling attaching/detaching members in association with each other. | 05-14-2009 |
20090255359 | ROTATIONAL DRIVE TRANSMISSION MECHANISM AND IMAGE FORMING APPARATUS USING THE SAME - A rotational drive transmission mechanism used in an image forming apparatus for transmitting rotational drive force using an internal gear and an external gear having involute tooth profiles, includes photoreceptor drum drive couplings for transmitting rotational drive force to photoreceptor drums and a transfer drive coupling for transmitting rotational drive force to an intermediate transfer belt drive roller. The internal gears provided for these are so formed that all the drive vectors of the rotational drive force transmitted to the teeth of either the internal gear or the external gear in mesh with the internal gear, are made uniform so as to be oriented either outwards from the center of the rotational axis or inwards toward the center of the rotational axis, equivalently relative to the center of the rotational axis. | 10-15-2009 |
Patent application number | Description | Published |
20080298841 | PHOTOSENSITIVE-MEMBER DRIVING MECHANISM - It is an object to prevent distortions and deviations of images caused by the eccentricity of a driven gear mounted to a rotational shaft of a photosensitive drum. There are provided a driving gear which is secured to a rotational shaft of a rotational driving power source and is rotated at a constant peripheral speed, a driven gear secured coaxially to a rotational shaft of a cylindrical-shaped photosensitive member, a phase control gear having the same diameter as that of the driven gear and having the same rotational speed variation characteristic as that of the driven gear, and a transmission gear, and a driving force from the driving gear is transmitted to the driven gear through the phase control gear and the transmission gear. | 12-04-2008 |
20090154945 | IMAGE FORMING APPARATUS - In an embodiment of the present invention, an image forming apparatus includes a transfer belt that primarily transfers a toner image formed on a photosensitive drum; a secondary transfer unit including a transfer mechanism portion that secondarily transfers the primarily transferred toner image to a paper; an optical sensor that detects a reference toner image on the transfer belt; and a shutter that protects a detection face of the optical sensor, wherein a separation/contact mechanism portion disposed so as to be brought into contact with both of the shutter and the secondary transfer unit is provided, and the separation/contact mechanism portion allows the shutter to move so as to open and allows the secondary transfer unit to move so as to separate from the transfer belt when the reference toner image is detected by the optical sensor, and allows the shutter to move so as to separate from the transfer belt when the secondary transfer unit is drawn out from an apparatus main body. | 06-18-2009 |
20090252540 | IMAGE FORMING APPARATUS - An image forming apparatus include: a plurality of photosensitive drums; a latent image forming unit for forming an electrostatic latent image on each photosensitive drum; a developing unit for developing each electrostatic latent image; a transferring unit for superimposing and transferring the developed images onto a moving record medium; a measurement unit for measuring positions of the transferred images on the record medium; and a control unit for controlling the photosensitive drums, the latent image forming unit, the developing unit, and the transferring unit. The control unit includes: a calculating unit for calculating a value related to alignment errors in the positions measured by said measurement unit in accordance with a sine-curve fitting method; and a correcting unit for correcting the alignment errors by the calculated value. | 10-08-2009 |
20120042586 | FLOOR TYPE MULTI-DISPLAY APPARATUS AND FLOOR STRUCTURE FOR INSTALLATION OF A FLOOR TYPE MULTI-DISPLAY APPARATUS - A floor type multi-display apparatus includes a multi-display, transparent panels, and a plurality of support members. The multi-display includes a plurality of displays. The support members include first support members disposed between adjacent ones of the displays in a scattered fashion, and second support members disposed around the multi-display. The support members have respective plate portions positioned along and closely to edges of the displays. The support portion and the base portion of each of the first support members project toward two displays located closely thereto from the plate portion of the first support member. The support portion and the base portion of each of the second support members project toward only one display located closely thereto from the plate portion of the second support member. | 02-23-2012 |
Patent application number | Description | Published |
20110157973 | NON-VOLATILE SEMICONDUCTOR MEMORY DEVICE CAPABLE OF PREVENTING OVER-PROGRAMMING - According to one embodiment, a semiconductor memory device includes a memory cell array, a data memory circuit, a power generation circuit, and a controller. In the memory cell array, a plurality of memory cells which store two-or-more-bit data are arrayed in a matrix. When data is written to all memory cells connected to selected word lines, the controller performs a write operation with a write voltage obtained by adding the step-up voltage to the write voltage until a write count indicating a number of times by which writing is performed reaches a first write count. When the first write count is exceeded, the controller controls whether the step-up voltage is to be added or not, for each write operation. | 06-30-2011 |
20140241072 | SEMICONDUCTOR MEMORY DEVICE - A semiconductor memory device includes a memory cell array including memory cells arranged therein. A first latch circuit temporarily holds data to perform a read operation and a write operation on the memory cell array. The second latch circuit temporarily holds a control signal. A control circuit controls the memory cell array, the first latch circuit and the second latch circuit. The control circuit limits an operation of the first latch circuit in a state after an operation on the memory cell array has been finished, and limits an operation of the second latch circuit based on a command supplied from external. | 08-28-2014 |
20150071006 | SEMICONDUCTOR STORAGE DEVICE - The semiconductor storage device of the embodiment includes memory cells. Word lines are connected to the memory cells. Bit lines are connected to the memory cells. A sense amplifier unit is connected to the bit lines. A data write operation includes a first write loop and a second write loop. The first write loop includes a first program operation and a first verify operation. The second write loop includes a second program operation and a second verify operation. A maximum value of a consumed current in the first verify operation is substantially equal to a maximum value of the consumed current in the second verify operation. The consumed current in the first verify operation is substantially same as the consumed current in the second verify operation if data input in the data write operation is all equal to first data corresponding to an erasure state. | 03-12-2015 |
Patent application number | Description | Published |
20110188319 | NONVOLATILE SEMICONDUCTOR MEMORY DEVICE AND NONVOLATILE SEMICONDUCTOR MEMORY SYSTEM - A nonvolatile semiconductor memory device and a nonvolatile memory system having a unit which suppresses erroneous reading of a nonvolatile semiconductor memory device of a multi-level memory system are provided. In the nonvolatile semiconductor memory device and the nonvolatile memory system of the multi-level memory system, a first verify voltage is used when data is written before a packaging process, and the verify voltage is switched to a second verify voltage lower than the first verify voltage when data is written after the packaging process. | 08-04-2011 |
20130314990 | SEMICONDUCTOR MEMORY DEVICE - According to one embodiment, the control circuit applies a pass potential to a first word line and a preliminary read-out potential to a second word line. The control circuit reads the data from the first memory cell transistor at a first condition when the second memory cell transistor has been switched to the ON state and at a second condition when the second memory cell transistor has been switched to an OFF state, by the applying of the preliminary read-out potential. The first condition enables the discrimination of the value of the first memory cell transistor in the case where a threshold distribution of the first memory cell transistor is relatively low. The second condition enables the discrimination of the value of the first memory cell transistor in the case where the threshold distribution of the first memory cell transistor is relatively high. | 11-28-2013 |
20140269097 | NON-VOLATILE SEMICONDUCTOR MEMORY DEVICE AND METHOD OF CONTROLLING THE NON-VOLATILE SEMICONDUCTOR MEMORY DEVICE - According to one embodiment, a non-volatile semiconductor memory device includes a memory cell array and a sense amplifier. The memory cell array includes a plurality of memory cell transistors. The sense amplifier reads data held in the memory cell transistors. The sense amplifier writes data to the memory cell transistors. The sense amplifier includes a first sense unit, a first operational unit, a second sense unit, and a second operational unit. The first sense unit includes a first sub-amplifier group and a first switch group. The second sense unit includes a second sub-amplifier group and a second switch group. The first sub-amplifier group is electrically connected to a first data bus. The second sub-amplifier group is electrically connected to a second data bus. The first operational unit is electrically connected to the first data bus and the second data bus. | 09-18-2014 |
Patent application number | Description | Published |
20130083602 | NONVOLATILE SEMICONDUCTOR MEMORY DEVICE - According to one embodiment, a write control unit performs a condition verify operation of searching for a low level region and a high level region of memory cells, and sets a write voltage of the low level region and the high level region in common and individually sets bit line voltages of the low level region and the high level region in a write operation after the condition verify operation. | 04-04-2013 |
20130083603 | NONVOLATILE SEMICONDUCTOR MEMORY DEVICE - One embodiment includes a write control unit that performs a first write operation with respect to a first threshold distribution, a first verify operation on the first threshold distribution, and a second write operation on the basis of a result of the first verify operation, and then starts a third write operation with respect to a second threshold distribution. | 04-04-2013 |
20150078083 | NONVOLATILE SEMICONDUCTOR MEMORY DEVICE - A nonvolatile semiconductor memory device includes a write control unit that performs a first write operation with respect to a first threshold distribution, a first verify operation on the first threshold distribution, and a second write operation on the basis of a result of the first verify operation, and then starts a third write operation with respect to a second threshold distribution. | 03-19-2015 |