Abstract: The invention pertains to a method for operating an image-processing device, in which an image signal is digitally transmitted between a transmitter and at least one receiver, and in which the image signal comprises a timed sequence of images. An alternating signal which alternates at a signal alternation frequency is superimposed on the image content of the images before they are transmitted, and the signal alternation frequency is greater than or equal to the perception frequency resolvable by the human eye. The invention also pertains to an image-processing device.

Abstract: The invention pertains to a method for operating an image-processing device in which an image signal on which a noise signal is superimposed is digitally transmitted between a transmitter and at least one receiver, and in which the image signal comprises a timed sequence of images, each containing its own image content and a noise pattern of the noise signal superimposed on the image content. At least certain areas of at least two successive images of the image signal are compared to each other after the transmission, and if a difference is found between the noise patterns contained in the images, it is concluded that the images have been transmitted successfully even if the image content of the images is identical. The invention also pertains to an image-processing device for the digital transmission of an image signal on which a noise signal is superimposed.

Abstract: A method for displaying a moving image on a display, such that all pixel lines of the display are addressed in each case during image periods for displaying image information, and a backlight for displaying the image information backlights the pixel lines. The display of moving images is enhanced by the fact that the pixel addresses remain unchanged during a first image period and a second image period, following the first image period, for displaying the same image information, and after the first image period, the backlight backlights the pixel lines following a waiting period.

Abstract: A method and an arrangement for improving the digital-signal-generated grayscale resolution of a monochrome visual display unit (3) to which the digital signals from an image source (1) can be supplied over n-bit wide RGB channels (2). Measures are proposed that make it possible to display distinguishable grayscale gradations on the visual display unit (3) regardless of whether a grayscale signal (6; 10) or RGB color signals (12, 13, 14) are transmitted to the visual display unit (3).

Abstract: In certain medical systems, such as modalities, it is not desirable to install a program for adjusting an image reproduction characteristic curve with respect to a reference characteristic curve. An arrangement which comprises a mobile telephone, an LCD display module and a look-up table to facilitate said adjustment is provided.

Abstract: In one aspect a transmission system with a transmitter which can be connected to a video source and a receiver linked to the transmitter via at least four circuit pairs, to which receiver a playback device can be connected is provided. Data is usually exchanged digitally between a graphics card in a personal computer and an LCD display module. The personal computer transmits a digital R, G, B video signal to the LCD display module via a special, so-called DVI (Digital Video Interface) cable. This DVI cable is also provided to transmit so-called DDC (Display Data Channel) data, which particularly comprises specification information of the LCD display module. A transmission system is proposed, which simplifies a connection of an LCD display module to a personal computer and with which the DVI cable can be dispensed with.

Abstract: The aim of the invention is to largely prevent certain influences from distributing the luminance of an image that can be reproduced on a panel of a flat screen. To this end, light-permeable parts are arranged between a sensor and a back light illuminating the panel from the rear, the ageing and/or temperature properties of said light-permeable parts essentially corresponding to those of the light-permeable parts of the panel.

Abstract: An image playback system (3), to which digital R, G, B video signals (R, G, B), respectively via R, G, B line pairs (7, 8, 9), and a communication signal (SDA) may be supplied by an image source (1), includes a program memory (18) in which configuration data for a programmable module (21) are stored, said data being necessary for operation of the image playback system (3). The disclosed system improves how firmware is updated for the image playback system.

Abstract: A method and an arrangement for optimizing the luminance characteristic curve for a display system using a lookup table. Digitized video levels are supplied to this lookup table and are optimized using correction values stored in the lookup table. With suitable means, the luminance characteristic curve can be easily adapted to standards and/or custom specifications. The memory requirement is low, since it is not necessary to provide different lookup tables for different ambient luminosities or selected reproduction models (curves).

Abstract: A method for adjusting the scanning frequency and/or the scanning phase of an analog/digital converter (3) of an image-reproducing device that has a digitally controlled display (1) for displaying an image of a predefined number of lines and a predefined number of pixels per line. The digitally controlled display receives digital image data from the analog/digital converter (3). The analog/digital converter generates the digital image data by scanning with a scanning signal that has the scanning frequency and the scanning phase of an analog video signal (6a). Therein, the analog video signal (6a) is applied to the image-reproducing device, and the digital image data is buffered in an image memory (2). The digital image data is compared with predefined data that correspond to the analog video signal, and the scanning frequency is adjusted until a comparison of the data provides a sufficient match.

Abstract: In certain medical systems, such as modalities, it is not desirable to install a program for adjusting an image reproduction characteristic curve with respect to a reference characteristic curve. An arrangement which comprises a mobile telephone, an LCD display module and a look-up table to facilitate said adjustment is provided.

Abstract: An arrangement with a panel of a flat screen and a graphics processor, to which a digitized image signal can be applied. A lookup table evaluates the digitized image signal and transmits the digitized image signal to the panel via an interface, whereby the image information is visually displayed. Suitable means are used to reduce interfering influences on the image reproduction characteristic of the panel due to aging effects of the light transmitting parts of the panel, e.g., due to aging effects of the panel glass, the LCD fluid or the diffuser and/or polarization foils. The sensor is only visible above the display surface during a calibration phase. The image reproduction characteristic is adjusted automatically on site, e.g., while the flat screen is in use. No service personnel are required for this purpose.

Abstract: A method and an arrangement for improving the digital-signal-generated grayscale resolution of a monochrome visual display unit (3) to which the digital signals from an image source (1) can be supplied over n-bit wide RGB channels (2). Measures are proposed that make it possible to display distinguishable grayscale gradations on the visual display unit (3) regardless of whether a grayscale signal (6; 10) or RGB color signals (12, 13, 14) are transmitted to the visual display unit (3).

Abstract: An image display unit (1) with a front frame (2) and with a sensor device (6) provided with a sensor (9). The sensor (9) is provided for detecting the luminance and/or the color location of an image that displayed on a display (7) of the image display unit (1). To detect luminance, known image display units have a sensor support that, in a non-operating position, is placed in a recess of a frame of a flat screen in an area that cannot be seen by a viewer. Suitable drives make it possible for the sensor support to swivel out from its non-operating position into a position for detecting the luminance. The production of an image display unit of this type is complex. In addition, the drives are susceptible to malfunction, making continuous and fault-free luminance detection impossible. The disclosed arrangement avoids these drawbacks.

Abstract: A method for displaying a moving image on a display, such that all pixel lines of the display are addressed in each case during image periods for displaying image information, and a backlight for displaying the image information backlights the pixel lines. The display of moving images is enhanced by the fact that the pixel addresses remain unchanged during a first image period and a second image period, following the first image period, for displaying the same image information, and after the first image period, the backlight backlights the pixel lines following a waiting period.

Abstract: Disclosed is a method for displaying a moving image on a display, such that all the pixel rows of the display are addressed during each image formation, and a backlight for displaying the image information backlights the pixel rows. The display of moving images is improved by delaying the backlighting during each image formation.