A system for tracking usage of digital content on user devices. Electronic stores coupled to a network sell licenses to play digital content data to users. Content players, which receive from the network the licensed content data, are used to play the licensed content data. Additionally, a logging site that is coupled to thte network tracks the playing of the content data. In particular, the logging site receives play information from the network, and the play information includes the number of times that the content data has been played by the associated content player. Also provided is a method for tracking usage of digital content on user devices. According to the method, a license to play digital content data is sold to a user, and the licensed content data is transmitted to a content player for the user.; Further, information is transmitted to a logging site whenever the content data is played by the content player or copied from the content player to an external medium so that usage of the licensed content data can be tracked.

System for tracking end-user electronic content usage

A lithographic apparatus configured to project a patterned beam of radiation onto a target portion of a substrate is disclosed. The apparatus includes a first radiation dose detector and a second radiation dose detector, each detector comprising a secondary electron emission surface configured to receive a radiation flux and to emit secondary electrons due to the receipt of the radiation flux, the first radiation dose detector located upstream with respect to the second radiation dose detector viewed with respect to a direction of radiation transmission, and a meter, connected to each detector, to detect a current or voltage resulting from the secondary electron emission from the respective electron emission surface.

Lithographic apparatus, and device manufacturing method

The invention provides an image display device that has an especially satisfactory display quality for animated images, and sufficiently suppresses the irregularities of display quality among pixels. The image display device includes a light emitting drive means that drives a light emitting means, based on an analog display signal inputted to the pixels, and a light emitting control switch for controlling a light-on or light-off of the light emitting means on one end of the light emitting drive means in each pixel.

Image Display Device

A method of displaying an image with a display device including a plurality of display pixels includes receiving image data for the image, the image data including individual pixels of the image; buffering the image data and creating a frame of the image, the frame of the image including a plurality of columns and a plurality of rows of the pixels of the image; defining a first sub-frame and at least a second sub-frame for the frame of the image, image data of the second sub-frame being offset from image data of the first sub-frame by an offset distance of at least one pixel; and displaying the first sub-frame with a first plurality of the display pixels and displaying the second sub-frame with a second plurality of the display pixels offset from the first plurality of the display pixels by the offset distance.

Image display system and method

Various embodiments described herein comprise illuminators comprising a phosphor color wheel for producing colored light. Light of a first wavelength emitted by a light source is incident on a phosphor color wheel comprising a plurality of different regions, where at least one of these regions comprises a phosphor that fluoresces at a second wavelength when illuminated with light of the first wavelength. The light from the light source and the different regions of the phosphor color wheel are movable with respect to each other such that as the different regions are illuminated by the light, different colors are produced.

Phosphor wheel illuminator

Methods of controlling the illumination source ( 18 ) of an SLM-based display system ( 10 ). It is assumed that the system ( 10 ) displays pixel data formatted into a bit-plane format so that all bits of the same bit-weight can be displayed simultaneously. To provide greyscale, the amplitude of the source ( 18 ) may be modulated so that bit-planes having greater bit-weights are displayed with more intense illumination than bit-planes having smaller bit-weights (FIGS. 2 and 3 ). To avoid visual artifacts, the duty cycle of the bit-plane display times may be shortened relative to the frame period. (FIG. 4 A). The latter method can be accompanied by a shortening of the duty time of the illumination on SLM ( 15 ). (FIG. 4 B). The short duty cycle method may be used together with illumination amplitude modulation, or it may be used with the PWM method of providing greyscale.

Modulated-amplitude illumination for spatial light modulator

A method and system for communicating and rendering stereoscopic or dual view images (fig. 1, 100) are provided. In one embodiment a method rendering stereoscopic images includes alternating on a display left (fig. 1, 106) and right (fig. 1, 108) perspectives of an image. Each of the left and right (fig. 1, 106 and 108) perspectives corresponds to a respective array of pixels on the display such that the left perspective is offset from a right perspective by less than a pixel width. The method further includes shuttering a portion of the light provided from the display in sequence with the alternating of the left and right perspectives of the image.

Method and system of communicating and rendering stereoscopic and dual-view images

A display system ( 200 ) in which light from source ( 202 ) is focused onto a spinning color wheel ( 204 ). The spinning color wheel ( 204 ) spins at a constant rate and creates of beam of light that changes from one primary color to the next in rapid sequence. The primary colored beam of light impinges a spatial light modulator ( 206 ), which is often a DMD or LCD. A controller ( 208 ) receives an input video signal and determines the native frame rate of the image source. The controller ( 208 ) sends image data to the spatial light modulator ( 206 ) in synchronization with the color wheel ( 204 )—image data representing the red portions of the image is sent during the period in which the red color filter is passing through the beam of light—at the native frame rate of the image source. The modulated light is focused onto an image plane ( 210 ) by projection lens ( 212 ) to form an image. The eye of the viewer integrates the sequential primary color images giving the perception of a single full-color image. The display system uses a single nominal color wheel speed to display input signals having various native frame rates. The nominal color wheel speed is selected to allow the same color wheel rate to be used for a variety of native frame rates. The color wheel speed is selected to provide a sub-frame rate that is an integer multiple the native frame rate of each potential input format.

Color wheel synchronization in multi-frame-rate display systems

A secure digital data distribution system ( 100 ) for preventing unauthorized access to digital data. The system utilizes an identification system module ( 116 ) embedded in a digital storage media ( 114 ) to grant authorization to media players ( 118 ). Prior to reading the digital data recorded on the media ( 114 ), an identification system interrogator ( 122 ) reads authorization data from the identification system module ( 116 ) to determine whether the media player ( 118 ) is authorized to read the media ( 114 ). If the authorization data matches the media player's unique identifier, authorization is granted and the media player ( 118 ) commences to read the media ( 114 ).

Secure distribution of digital data

Methods of controlling the illumination source (18) of an SLM-based display system (10). It is assumed that the system (10) displays pixel data formatted into a bit-plane format so that all bits of the same bit-weight can be displayed simultaneously. To provide greyscale, the amplitude of the source (18) may be modulated so that bit-planes having greater bit-weights are displayed with more intense illumination than bit-planes having smaller bit-weights. To avoid visual artifacts, the duty cycle of the bit-plane display times may be shortened relative to the frame period. (FIGURE 4A). The latter method can be accompanied by a shortening of the duty time of the illumination on SLM (15). (FIGURE 4B). The short duty cycle method may be used together with illumination amplitude modulation, or it may be used with the PWM method of providing greyscale.

Keith H. Elliott

Papers

Modulated-amplitude illumination for spatial light modulator

Method and system of communicating and rendering stereoscopic and dual-view images

Color wheel synchronization in multi-frame-rate display systems

Secure distribution of digital data

Illumination method for displays with a spatial light modulator