摘要:
A ring oscillator setting apparatus and method depending on an environmental change of an image formation apparatus is provided. The apparatus includes a plurality of ring oscillators (100) for generating different oscillation frequencies. The apparatus further includes a loopspeed detection unit (120) to detect a loopspeed representing the number of pulses generated at the oscillation frequency by one of the ring oscillators (100) selected from the plurality of ring oscillators (100) for a predetermined unit time. Moreover, a state sensing unit (140) is provided to detect a state of system environment of the image formation apparatus. A setting control unit (160) is also provided to select and set one of the ring oscillators (100) selected corresponding to change of the loopspeed detected from the loopspeed detection unit (120) among the plurality of ring oscillators (100) in response to the detected state of the state sensing unit (140). Therefore, even when external environment changes such as temperature and voltage of the image formation apparatus change, the one of the ring oscillators (100) selected having the optimal loopspeed to generate a video clock can be set. Therefore, it is possible to minimize degradation of image quality caused by environmental changes.
摘要:
An electronic device that checks a connected state of a signal line is provided. The electronic device includes a controller configured to transmit a check signal and at least one module configured to include a closed loop and receive the check signal. When the controller receives the check signal through the closed loop, the controller determines that the at least one module is connected to the controller.
摘要:
An image forming apparatus and an auto color registration method of the same which prints a color image by a single pass, the image forming apparatus including: a plurality of developing units (130) which each develop a color image in a predetermined color; a transfer unit which transfers the color image developed by developing units to the print medium and include a transfer belt (151) rotatably installed on a transfer path; a first detector (171) provided in a predetermined location of the transfer belt to face the transfer belt and detects any defect from a surface of the transfer belt; a second detector (175) provided in a predetermined location of the transfer belt to face the transfer belt and detects an error transferred to the transfer belt; and a controller which adjusts the ACR error based on data detected by both the first detector and the second detector within a single pass.
摘要:
An image forming apparatus includes: a plurality of optical scanning parts (20a,b,c,d) that scan a photoconductor (10) with light of plural colors to form an electrostatic latent image on the photoconductor (10) based on print data; and a controller (60) that, based on a first optical scanning part (20a) to which a horizontal synchronization signal is applied of the optical scanning parts (20a,b,c,d), calculates an offset value for light-scan of a second optical scanning part (20b) of the optical scanning parts (20a,b,c,d), and controls the optical scanning parts (20a,b,c,d) to scan the photoconductor (10) with the light according to the calculated offset value.
摘要:
A ring oscillator setting apparatus and method depending on an environmental change of an image formation apparatus is provided. The apparatus includes a plurality of ring oscillators (100) for generating different oscillation frequencies. The apparatus further includes a loopspeed detection unit (120) to detect a loopspeed representing the number of pulses generated at the oscillation frequency by one of the ring oscillators (100) selected from the plurality of ring oscillators (100) for a predetermined unit time. Moreover, a state sensing unit (140) is provided to detect a state of system environment of the image formation apparatus. A setting control unit (160) is also provided to select and set one of the ring oscillators (100) selected corresponding to change of the loopspeed detected from the loopspeed detection unit (120) among the plurality of ring oscillators (100) in response to the detected state of the state sensing unit (140). Therefore, even when external environment changes such as temperature and voltage of the image formation apparatus change, the one of the ring oscillators (100) selected having the optimal loopspeed to generate a video clock can be set. Therefore, it is possible to minimize degradation of image quality caused by environmental changes.
摘要:
An image forming apparatus and an auto colour registration method thereof. The automatic colour registration method of the image forming apparatus, the method includes transferring a plurality of first patterns synchronized with a phase of an image receptor, detecting the transferred first patterns, and performing an automatic colour registration (ACR) by controlling a driving speed of the image receptor based on the detected first pattern. With this, the apparatus and method controls a driving speed of an image receptor by using a pattern synchronized with a phase of the image receptor and improves accuracy of the ACR.