| Patent application number | Description | Published |
|---|
| 20090009504 | Method of Driving a Display Panel with Depolarization - The method comprises, in addition to emission periods, depolarization periods during which a predetermined depolarization voltage, which exhibits a polarity opposite to the polarity opposite to the voltage applied during the emission periods, is applied and sustained at the control terminal of said driver circuits of the panel, and a reference depolarization voltage, which is different from the reference emission voltage, is applied to the reference electrodes to which reference terminals of the driver circuits are linked. This method makes it possible to use conventional and inexpensive column control means. | 01-08-2009 |
| 20090015575 | Method for Controlling a Display Panel by Capacitive Coupling - A method comprising emission periods during which a predetermined emission voltage which presents a first polarity, is applied and sustained at the control terminal of at least one driver of said panel, and depolarization periods during which a predetermined depolarization voltage which presents a second polarity, opposite to the first polarity, is applied and sustained at the control terminal of at least one driver of said panel, the address signals of the circuits of said panel being transmitted by capacitive coupling of the address electrodes to the control terminals of these circuits. The invention makes it possible to use conventional and inexpensive means of controlling the address electrodes. | 01-15-2009 |
| 20090051710 | Display Method in an Active Matrix Display Device - The present invention relates to a method for displaying an image in an active matrix display device and more particularly in an active matrix OLED (Organic Light Emitting Display) display. The purpose of this invention is to increase the video dynamic range of each color component. The voltages applied to the OLED cells are based on reference voltages or currents. According to the invention, a different set of reference voltages is used for each colour component. To this end, the video frame is divided into at least three sub-frames and at least one colour component of the picture is addressed during each subframe with a set of reference voltages adapted to said color component. | 02-26-2009 |
| 20090103802 | Device, system and method for characterizing a colour device - A method for characterizing a colour reproduction device. A first output colour measure responding to a first reference input colour value is measured under normal measurement conditions. The measurement conditions are modified and a second output colour measure responding to the first reference input colour value is measured under the modified measurement conditions. A transformation rule, enabling transformation between the second output colour measure and the first output colour measure, is calculated from the first colour value and the second colour value. A first set of output colour measures responding to a set of input colour values is measured under modified measurement conditions, and the first set of output colour measures is converted, using the transformation rule, to a second set of output colour measures. A system and a control device are also provided. | 04-23-2009 |
| 20090108182 | Global anticamcorder projection system and method - Method of displaying images on a projection screen in front of a place for an audience, by using different visually-equivalent metameric colors for different portions of images, and by simultaneously illuminating said place for the audience with perturbing infrared radiations and by simultaneously detecting any image capture device in the place for the audience, wherein:
| 04-30-2009 |
| 20090285478 | Method of processing of compressed image into a gamut mapped image using spatial frequency analysis - The spatial frequency analysis contained in the compressed image is used not only for decompression of images but also for the selection of an appropriate gamut mapping algorithm. Computation resources are then saved because no specific spatial frequency analysis is required for the selection of an appropriate gamut mapping algorithm. | 11-19-2009 |
| 20100020056 | Display Panel and Control Method Using Transient Capacitive Coupling - Panel comprising display drivers which, each 1′″, comprise a select switch and a clamping switch which are controlled by the same select electrode, and a coupling capacitor for transiently coupling the control terminal of this circuit C to an address electrode. A control method comprising emission periods and depolarization periods, where all the address signals have the same polarity. The invention makes it possible in particular to use conventional and inexpensive means of controlling the address electrodes. | 01-28-2010 |
| 20100033684 | METHOD TO DISPLAY IMAGES WITH METAMERIC JAMMING TO PREVENT ILLEGAL COPY - Method to display an image using four or more primaries having different spectral distributions that are distributed into three groups of primaries, wherein, in a visual color space, all primaries belonging to the same group have the same visual color and are metamehc. Each image being got from a combination of three primary images and each primary image being associated with each visual color of a group, the different primaries of each group are spatially or sequentially distributed over the primary image associated with this group, then allowing an efficient anti-copy protection based on metamerization of images, without any supplemental video processing. | 02-11-2010 |
| 20100053431 | METHOD AND DEVICE FOR PROCESSING A SEQUENCE OF SOURCE PICTURES - The invention relates to a method for combating the copying of source pictures by means of a camera while they are being displayed, for example using a camcorder in a movie theatre. To this end, it is known, in classical projection systems, to modulate by a carrier wave the brightness of some pixels of the pictures. The frequency of the carrier wave is usually constant and generally half the refresh frequency. The main problem with such systems is that once a pirate has figured out what the modulation frequency is, he can configure his camcorder shutter to filter out this frequency and bypass the anti-camcorder method. According to the invention, the frequency of the carrier is changed at least once throughout the displaying of the sequence pictures or the movie, to defeat all camcorders standards (PAL/NTSC) and shutter configurations. | 03-04-2010 |
| 20100085491 | PROJECTION SYSTEM BASED ON METAMERISM - The invention relates to a projection system for displaying at least one visual image based on three primary colours, comprising a signal processing unit for converting said visual image into at least a visual image based on four primary colours, a frequency band being associated to each colour primary, first display means for displaying three first primary colours of said visual image on a screen and second display means for displaying at least the fourth primary colour of said visual image on said screen. According to the invention, the system further comprises optical filtering means that are adapted to enhance the separation between the frequency spectrum of the first three primary colours of the first display means and the frequency spectrum of the at least fourth primary colour of the second display means. Application to anti-camcorder systems. | 04-08-2010 |
| 20100091200 | METHOD TO DISPLAY IMAGES USING METAMERISM TO PREVENT ILLEGAL COPY - A method to display images using four or more different primaries having different spectral distributions wherein, in the LMS color space, at least two of these primaries have the same L coordinates and the same M coordinates; thank to the invention, different metamers, when being legally displayed, will be not only perceptually indistinguishable to a viewer with normal color vision but also indistinguishable by most of the viewers with non-normal color vision. | 04-15-2010 |
| 20100098288 | Method of processing images to combat copying - The invention relates to a method of processing source images which is intended to combat their copying by a camcorder or a camera during their display, for example in a cinema hall. The source image sequence represents a scene. According to the invention, the method comprises the following steps:
| 04-22-2010 |
