Samsung Electronics Co., Ltd.

Hewlett-packard Development Company, L.p.

Hp Printing Korea Co., Ltd.

Soo Yong Kim

Sang Bum Woo

Sung Dae Kim

Jae Il Yu

Chang Yong Sung

Sang Hoon Lee

Seung Jae Lee

Jun Young Lee

Sung Wook Kang

Chang-Ju Lee

Hyun Ki Cho

Jun Ho Huh

Kyoung Hwan Kwon

Mun Bo Shim

Sun Joo Hong

A display driver integrated circuit, System-On-Chip, and display system including the System-On-Chip are provided. A display driver integrated circuit (IC) includes: a clock generator configured to generate an internal operating clock; and a control circuit configured to provide a data signal to a pixel array based on the internal operating clock, wherein the data signal corresponds to frame data, wherein the control circuit is further configured to, in a frame data update period: receive first frame data, perform a first synchronization operation on the internal operating clock based on the first frame data, and provide a first data signal to the pixel array, and wherein the control circuit is further configured to, in a low power mode (LPM) period when an update of the frame data is not performed: transmit a sync request signal based on a result of monitoring a state of a display panel, receive a frequency signal from a System-on-Chip (SoC) in response to the sync request signal, and perform a second synchronization operation on the internal operating clock based on the frequency signal.

Display driver integrated circuit, system-on-chip, and display system including the system-on-chip

An electromagnetic (EM) sensor includes a front end module generating an EM signal using electromagnetic waves transmitted from an external source, a sensor memory storing a portion of a plurality of machine learning models used to recognize the EM signal, and a microcontroller unit for recognizing the external electronic device emitting the electromagnetic waves by inputting feature values extracted from the EM signal to the machine learning models. If the machine learning models stored in the sensor memory are not able to recognize the external device, the feature values may be transmitted to a main processor, and the main processor may compare the feature values to another set of machine learning models.

Electromagnetic sensor and mobile device including the same

An image forming apparatus and a method of reducing image banding of the image forming apparatus is provided. The image forming apparatus includes: a photoconductor unit on which an electrostatic latent image is formed; and a conveying unit configured to convey printing medium at a first conveying velocity toward the photoconductor unit, and configured to convey the printing medium at a second conveying velocity that is lower than the first conveying velocity when the printing medium approaches the photoconductor unit.

Image forming apparatus and method for reducing image banding of the image forming apparatus

A power transmitting device having a structure to allow a photoconductor to stably form a visible image on a printing medium. The power transmitting device interconnects a rotator and a drive motor, the drive motor generating drive power to drive the rotator. The power transmitting device includes at least one gear to be rotated upon receiving power from the drive motor, a rotating shaft having one end penetrating the gear and a coupler to interconnect the other end of the rotating shaft and the rotator. An outer diameter of the coupler, an outer diameter of the rotator and an outer diameter of the gear satisfy the following relation: 0.7D1&#x3c;Dc&#x3c;D2, where, D1: outer diameter of the rotator, D2: outer diameter of the gear and Dc: outer diameter of the coupler.

Power transmitting device and image forming apparatus having the same

Disclosed herein is an image forming apparatus that has a developing unit, an intermediate transfer body, and a transfer roller and may prevent contamination of the transfer roller and a printing medium by the toner remaining in a test pattern forming area of the intermediate transfer body. The image forming apparatus includes a developing unit to allow an image to be formed by a developing agent, an intermediate transfer body provided with an image forming area and a test pattern forming area, the image being transferred from the developing unit to the image forming area and the test pattern forming area, and a transfer roller allowing the image to be transferred from the image forming area to a printing medium, wherein a maximum transfer length of the transfer roller is less than a maximum image forming length of the developing unit.

Image forming apparatus having developing unit

An image forming apparatus, a color registration test pattern of the image forming apparatus, and a method of forming the color registration test pattern are provided. A time required for color registration may be reduced by minimizing a region in which a color registration test pattern is formed on an intermediate transfer body. A control method of the image forming apparatus, which includes photosensitive media arranged side by side to correspond to colors in a rotation direction of the intermediate transfer body, includes forming first patterns of the colors arranged in a single row in a sub-scanning direction in a first region of the intermediate transfer body over a single-rotation period of the photosensitive media, and forming second patterns of the colors arranged in a single row in the sub-scanning direction in a second region of the intermediate transfer body over another single-rotation period of the photosensitive media.

Image forming apparatus and method of controlling the same

An image forming apparatus and method which reduces time taken for color registration and reflects misregistration of colors in real time to correct color misregistration of prints are provided. Image forming apparatus may include photoconductor elements corresponding to colors; first sensing unit arranged between first and second photoconductor elements among photoconductor elements, and sensing toner images transferred to intermediate transfer body; final sensing unit arranged after final photoconductor element among photoconductor elements, and sensing transferred toner images; and controller calculating fixed errors of remaining colors except for first color among colors, with respect to first color corresponding to first photoconductor element, based on output values of final sensing unit before printing, calculating variable error based on output value of first sensing unit during printing, and adjusting scanning time of at least one color of remaining colors in real time in consideration of fixed errors and variable error.

Image forming apparatus and control method thereof

An image forming apparatus, which achieves reduced color registration time and real-time calibration of color position shift, and a control method for the same, is provided. The image forming apparatus includes plural photoconductors corresponding to plural colors, an exposure unit to form an electrostatic latent image by emitting light to the photoconductors, a developing unit to form a toner image by feeding toner to the photoconductors, an intermediate transfer body to which the toner image, formed on each photoconductor, is transferred, a sensing unit to sense the toner image formed on the intermediate transfer body, and a controller which forms images in respective image forming sections of the intermediate transfer body and test-pattern sets for color registration in respective blanks between the neighboring image forming sections, the controller implementing color registration calibration using color registration calibration values acquired from four test pattern sets among the formed test pattern sets.

Image forming apparatus and control method for the same

Disclosed herein is a photosensitive body unit having an improved structure capable of disposing a developing unit at a correct position to supply developer to a photosensitive body, and an image forming apparatus including the photosensitive body unit. The image forming apparatus includes a main body, a photosensitive body housing mounted in the main body, a photosensitive body rotatably coupled to the photosensitive body housing, and a developing unit detachably mounted in the main body to supply developer to the photosensitive body. The photosensitive body housing includes a guide portion to determine a mounting position of the developing unit when the developing unit is mounted in the main body.

Photosensitive body unit and image forming apparatus including the same

A power transmission device and an image forming apparatus having the same that is capable of reliably transmitting intermittent power to a driven component from a driving source. The power transmission device includes a shaft, a first intermittent gear to receive power from the driving source and to rotate on the shaft, a second intermittent gear arranged so as to move between a first position in which the second intermittent gear is connected to the first intermittent gear along an axial direction of the shaft and a second position in which the second intermittent gear is disconnected from the first intermittent gear, a sliding unit arranged so as to slide along the shaft and to move the second intermittent gear in the axial direction of the shaft, and a driving unit to drive the sliding unit.

Power transmission device and image forming apparatus having the same

An image forming apparatus capable of minimizing color mis-registration due to runout of gears is disclosed. The image forming apparatus includes a plurality of photosensitive bodies having transfer points to transfer images onto a transfer object, a driving source to drive at least two photosensitive bodies of the plurality of photosensitive bodies, and a driving gear train to transmit driving power from the driving source to the at least two photosensitive bodies. The driving gear train includes photosensitive body shaft gears respectively connected to the photosensitive bodies driven by the driving source, and connecting gears to transmit the driving power to the photosensitive body shaft gears. When any one of the photosensitive body shaft gears is set to a reference photosensitive body shaft gear, the number of teeth of the connecting gear, which is disposed at a jposition from the reference photosensitive body shaft gear, is determined so that a value calculated from the following equation is substantially an integer.  Here, D refers to a diameter of each of the photosensitive bodies, L refers to a distance between the transfer points of two adjacent photosensitive bodies, and Rrefers to a speed reduction ratio from the jconnecting gear to the reference photosensitive body shaft gear.

Growing community of inventors

Suwon-si, South Korea

Soo Yong Kim