A display apparatus is provided. The display apparatus includes a display panel, a backlight unit configured to provide light to the display panel, and a processor configured to identify a plurality of areas in an image fame, calculate a motion value corresponding to each of the plurality of areas, and control a driving signal for a backlight driver based on one of the plurality of areas according to the calculated motion value.

A setting unit of a controller mounted on a control board sets a first mode for generating, from image data, PWM data indicating a pattern for causing an LD to emit light and transmitting to a laser driving board, or a second mode for transmitting to the laser driving board image data prior to generation of the PWM data. A data conversion unit, in the first mode, converts inputted image data into N pieces of PWM data respectively corresponding to N LDs, and in the second mode, converts inputted image data into image data for each scanning line. A P/S conversion unit converts data outputted from the data conversion unit from a serial format into a parallel format, and transmits the converted data to the laser driving board as control data.

A printing system and method comprising a transport system configured to move a print target, a laser for directing energy on the print target, and a control system configured to adjust the energy directed on the print target according to a present speed of the print target the control system further comprising an analog control, a scrolling window control, a pulse width modulation control, and a halftone modulation control.

A printing system and method comprising a transport system configured to move a print target, a laser for directing energy on the print target, and a control system configured to adjust the energy directed on the print target according to a present speed of the print target the control system further comprising an analog control, a scrolling window control, a pulse width modulation control, and a halftone modulation control.

Provided is an image forming apparatus outputs for each pixel, together with the pixel data, pixel position data which adjusts an irradiation position for each pixel of the laser light in a range of one pixel in a scanning direction, generates a pulse width signal at a pixel position corresponding to the pixel position data and having a pulse width corresponding to the pixel data, generates the laser light based on the pulse width signal, and corrects, via the adjustment by the pixel position data, the pulse widths of the pulse width signals to different values depending on whether the pulse width signals of the adjacent two pixels contact with each other.

An image processing apparatus includes: an image determining unit configured to determine a gradation value for each predetermined range in input image data; and a screen generator configured to arrange dot images around a plurality of growth centers in a halftone dot screen to form respective dot blocks if an input area rate indicating a ratio of black to white in dot images at the gradation value is smaller than a value at which an image defect occurs, and form bridges to connect adjacent dot blocks during a smallest gradation number if distances between the adjacent dot blocks decrease to a predetermined value or less along with growth of the dot blocks, to form a void halftone dot image.

An disclosed image processing apparatus reproduces an input pixel expressed by a gray level through a printing process performed on a plurality of segmented regions of the input pixel, based on an output pattern. The image processing apparatus includes: a duplicator configured to duplicate the input pixel into at least two pixels; a storage configured to store a plurality of tables, each of the plurality of tables associating the gray level and an output pattern of one of the duplicated pixels, such that a plurality of output patterns exist with respect to each gray level; and a controller configured to control a plurality of output regions, based on the output pattern corresponding to the gray level of the input pixel in accordance with a table selected for each of the duplicated pixels, the plurality of output regions corresponding to the plurality of segmented regions of each of the duplicated pixels.

A setting unit of a controller mounted on a control board sets a first mode for generating, from image data, PWM data indicating a pattern for causing an LD to emit light and transmitting to a laser driving board, or a second mode for transmitting to the laser driving board image data prior to generation of the PWM data. A data conversion unit, in the first mode, converts inputted image data into N pieces of PWM data respectively corresponding to N LDs, and in the second mode, converts inputted image data into image data for each scanning line. A P/S conversion unit converts data outputted from the data conversion unit from a serial format into a parallel format, and transmits the converted data to the laser driving board as control data.

A method and a system for image compression are disclosed. An image is converted to a halftoned image. The one or more halftoned lines in the halftoned image comprise one or more pixels. A first transformed image is generated from the halftoned image based on shifting of the one or more pixels, associated with the one or more halftoned lines in the halftoned image, by a first value. A second transformed image is generated from the first transformed image based on shifting of the one or more pixels, associated with the one or more halftoned lines in the first transformed image, by a second value. Further, a compressed image is generated based on compression of the second transformed image. The compressed image is stored in a storage device. Another method and system for image conversion are disclosed that converts the compressed image back to the first transformed image.

An image forming apparatus is provided, which is capable of implementing updating of gamma correction information with a high accuracy while avoiding a wasteful output of a patch image even in the case where environmental fluctuations occur. The image forming apparatus corrects a density tone level of image data by using gamma correction information, forms an image based on the corrected image data, and includes an updating unit configured to update the gamma correction information by using a patch image, and the updating unit updates the gamma correction information by using a patch image the output stability of which is high as first updating and further updates the gamma correction information updated by the first updating by using a patch image the sensitivity of which is high as second updating.