Matches 1 - 33 out of 33
Match Document Document Title
7366393 Light enhancing structures with three or more arrays of elongate features  
Various embodiments comprise light recycling films comprising an array of parallel ridges and grooves that form prisms that selectively reflect or transmit light. In some embodiments, the light...
7231070 Fingerprint recognition system  
A method and apparatus for fingerprint recognition is provided. A fingerprint is detected on a sensor. The fingerprint is digitized. A digitized background is subtracted from the fingerprint,...
7221847 Optical elements having programmed optical structures  
An optical element, such as a lightguide or an optical film, is formed with a predetermined, programmed pattern of optical structures. The optical structures may be arranged to selectively correct...
7046905 Blacklight with structured surfaces  
A backlight includes a lightguide, a light source disposed with respect to the lightguide to introduce light into the lightguide and a turning film. Optical structures are formed in one of an...
6956608 Fingerprint imaging device including an optical plate having microreflectors  
A compact-sized fingerprint imaging device includes an optical plate for creating a fingerprint pattern at a finger field on the optical plate. The fingerprint pattern is illuminated with light...
6950539 Configurable multi-function touchpad device  
A touchpad device comprised of a detection array having a detection surface, wherein the detection surface is configured to receive a fingerprint image. Additionally, a processing device is...
6895705 Light panel  
A display device is provided comprising a transparent panel having a light receiving edge and a face. A plurality of laser etched grooves are formed in the face of the panel such that the grooves...
6845212 Optical element having programmed optical structures  
An optical element, such as a lightguide or an optical film, is formed with a predetermined, programmed pattern of optical structures. The optical structures may be arranged to selectively correct...
6741729 Fingerprint recognition system  
A method and apparatus for fingerprint recognition is provided. A fingerprint is detected on a sensor. The fingerprint is digitized. A digitized background is subtracted from the fingerprint,...
6707611 Optical film with variable angle prisms  
An optical turning film has a first surface including an array of prisms. The array has a plurality of first prisms, with each of the first prisms having a first prism configuration, and a...
6665427 Apparatus and method for electronically acquiring fingerprint image with low cost removable platen and separate imaging device  
In one embodiment, a fingerprint sensing system includes a sheet prism having a sensing surface and a number of prismlets positioned opposite to the sensing surface. Each prismlet has an entrance...
6560026 Optical film with variable angle prisms  
An optical turning film has a first surface including an array of prisms. The array has a plurality of first prisms, with each of the first prisms having a first prism configuration, and a...
6447135 Lightguide having a directly secured reflector and method of making the same  
A lightguide includes an input edge surface, a back surface and an output surface. A reflector is directly secured to the back surface by, for example, adhesive bonding.
6356391 Optical film with variable angle prisms  
An optical turning film has a first surface including an array of prisms. The array has a plurality of first prisms, with each of the first prisms having a first prism configuration, and a...
6324310 Method and apparatus for scanning a fingerprint using a linear sensor  
A method and apparatus for scanning a fingerprint using a linear optical sensor. A finger or palm is rolled over a transparent roller. A light source directs light through the roller to illuminate...
6322225 Light scattering guiding light source device and liquid crystal display  
A light scattering guiding light source device with a good directionality, having a simplified construction and usable for a backlight source of a liquid crystal display device and the like. A...
6282303 Method and apparatus for scanning a fingerprint using a linear sensor within a cursor control device  
A method and apparatus for scanning a fingerprint using a linear optical sensor. A finger or palm is rolled over a transparent roller. A light source directs light through the roller to illuminate...
6188781 Method and apparatus for illuminating a fingerprint through side illumination of a platen  
The present invention provides a method and apparatus for illuminating a fingerprint. A finger is placed on a transparent platen which has a microprism array on one surface. A light source directs...
6166791 Reflection-type liquid crystal displaying device having anistropic scattering film  
A reflection-type liquid crystal displaying device is described. It has at least one optically transmitting first substrate on which an optically transmitting electrode is formed and a second...
6144536 Illumination system with light recycling to enhance brightness  
An optical illumination system is comprised of: (a) a light source means having a reflective emitting surface and an intrinsic luminance (brightness), (b) a light transmitting means; (c) a light...
6125192 Fingerprint recognition system  
A method and apparatus for fingerprint recognition is provided. A fingerprint is detected on a sensor. The fingerprint is digitized. A digitized background is subtracted from the fingerprint,...
6122737 Method for using fingerprints to distribute information over a network  
A method, apparatus, and article of manufacture for distributing information from a provider to a user over a network. User fingerprint data is obtained from the user and transferred to the...
6097035 Fingerprint detection apparatus with partial fingerprint images  
A fingerprint detection apparatus which includes a detection array having a detection surface, and a fingerprint platform configured to supply a plurality of partial fingerprint images of a...
6035398 Cryptographic key generation using biometric data  
A method and apparatus for generating a cryptographic key using biometric data is provided. A fingerprint is received, and features are extracted from the fingerprint. These features may include...
6002464 Light diffusing sheet having a layer incorporated with light diffusing material and a layer with a corrugated surface  
A light diffusing sheet including a clear film (#1) and two light diffusing layers (#2 and #3) formed consecutively thereon. The diffusing sheet is characterized in that the first light diffusing...
5932342 Optical diffusers obtained by fluid phase mixing of incompatible materials  
A process for producing a light diffusing sheet material, and materials made therefrom. A dispersion of light scattering optically clear particles in an optically clear matrix during mixing of the...
5889570 Reflection--type liquid crystal displaying device  
A reflection-type liquid crystal displaying device includes an optically transmitting first substrate on which an optically transmitting electrode is at least formed; an anisotropic...
5810464 Surface light source device of side light type  
A surface light source device of side light type controls the intensity of light rays emitted therefrom. The surface light source device of side light type comprises a light scattering guide 20...
5796858 Fingerprint sensing system using a sheet prism  
In one embodiment, a fingerprint sensing system includes a sheet prism having a sensing surface and a number of prismlets positioned opposite to the sensing surface. Each prismlet has an entrance...
5735590 Backlighting device with a transparent sheet having straight ridges  
A linear light source is disposed adjacent to the side face of a transparent light conducting plate. The thickness of the light conducting plate decreases as the position goes away from the light...
5596429 Liquid crystal display  
A back lighted liquid crystal display including a light converging assembly, a light-guiding plate, a reflecting plate, and a diffusing plate integrally welded together outside of the display area...
5579134 Prismatic refracting optical array for liquid flat panel crystal display backlight  
A prismatic refracting array for a flat panel liquid crystal display (LCD) backlighting device matches a prismatic angle with the critical angle of the exit window and surrounding material, e.g.,...
5467208 Liquid crystal display  
A liquid crystal display including a sheet for converging light from a back light source. The sheet may be an array of truncated prisms, an array of prisms separated by flat portions, asymmetrical...
Matches 1 - 33 out of 33