Abstract: A light guide (100) comprises a light guide plate (110) with an illumination region (111). The light guide plate has a first main surface (112) and a second main surface (113) opposite to the first main surface, and comprises an out-coupling arrangement (120) for coupling light (150) propagating in the light guide plate out of the light guide plate through the first and/or the second main surface in the illumination region. The out-coupling arrangement comprises first out-coupling stripes (121) extending over the illumination region, each first out-coupling stripe defining a horizontal extension of a first light channel (141) in the light guide plate and being configured to couple light propagating substantially in a first direction along the first light channel, out of the light guide plate. Adjacent first out-coupling stripes are separated by an intermediate region (124) with light coupling properties substantially different from those of the first out-coupling stripes.

Abstract: A light guide (100) comprises a light guide plate (110) with an illumination region (111). The light guide plate has a first main surface (112) and a second main surface (113) opposite to the first main surface, and comprises an out-coupling arrangement (120) for coupling light (150) propagating in the light guide plate out of the light guide plate through the first and/or the second main surface in the illumination region. The out-coupling arrangement comprises first out-coupling stripes (121) extending over the illumination region, each first out-coupling stripe defining a horizontal extension of a first light channel (141) in the light guide plate and being configured to couple light propagating substantially in a first direction along the first light channel, out of the light guide plate. Adjacent first out-coupling stripes are separated by an intermediate region (124) with light coupling properties substantially different from those of the first out-coupling stripes.

Abstract: A light guide having a light guide body plate having a plurality of elongated light channels extending substantially parallel to each other; the light guide having an out-coupling arrangement for coupling light propagating in the light channels out of the light guide body plate through the first and/or the second main surface. In a horizontal transverse direction, each light channel is confined between two confining stripes formed of a solid confining material having a second refractive index lower than the first refractive index, confining stripes between two adjacent light channels having a height less than the thickness of the light guide body plate.

Abstract: A light guide having a light guide body plate having a plurality of elongated light channels extending substantially parallel to each other; the light guide having an out-coupling arrangement for coupling light propagating in the light channels out of the light guide body plate through the first and/or the second main surface. In a horizontal transverse direction, each light channel is confined between two confining stripes formed of a solid confining material having a second refractive index lower than the first refractive index, confining stripes between two adjacent light channels having a height less than the thickness of the light guide body plate.

Abstract: A lens including: a central refracting portion and a peripheral portion configured to support the lens in a lens mount wherein the peripheral portion has a surface including at least one out-coupling element configured to couple light out of the lens.

Abstract: A light pipe includes a light input end and a diffractive structure. The diffractive structure includes elongated formations having diffractive properties for coupling light out from the light pipe to provide backlighting of a flat-panel display. The elongated formations are curved, the curvature being dependent on the location of a light source at the light input end.

Abstract: A light pipe includes a surface provided with a pattern that has diffractive properties, where the pattern has uniform, mutually different areas on the surface such that some of the areas are configured to distribute light from a light input end of the light pipe to form macroscopically uniform distribution of light and some other areas are configured to couple light out from the light pipe in order to produce lighting, and where the relative proportion of surface covered by areas configured to distribute light is arranged to decrease in relation to increase of distance from the light input end.

Abstract: The invention relates to a method and an apparatus for manufacturing an optical coupling arrangement, and a specific coupling arrangement. A substrate waveguide (306) and at least one coupling element (304, 306) in the coupling arrangement are made of polymer material in the same replication process at the same time. At least one diffractive coupling element (304, 306) is then formed in the polymer material by placing the polymer material against a replication mould, which comprises a surface profile model of at least one diffractive coupling element (304, 306) that is patterned into the replication mould by means of micro lithography.

Abstract: The invention relates to a new light pipe (313) for providing backlighting (312) of a flat-panel display (311) by means of at least one light source so that the light pipe has at least one surface which comprises patterns. The patterns have diffraction properties for conducting the light in the direction of the display, and the patterns comprise uniform, mutually different areas having a certain distribution on the surface of the light pipe. The local outcoupling efficiency of the light pipe depends on the characteristic properties of the patterns, which are dependent on the distance to the light source or its wavelength.

Abstract: A light pipe includes a light input end and a diffractive structure. The diffractive structure includes elongated formations having diffractive properties for coupling light out from the light pipe to provide backlighting of a flat-panel display. The elongated formations are curved, the curvature being dependent on the location of a light source at the light input end.

Abstract: The invention relates to a new light pipe (313) for providing backlighting (312) of a flat-panel display (311) by means of at least one light source so that the light pipe has at least one surface which comprises patterns. The patterns have diffraction properties for conducting the light in the direction of the display, and the patterns comprise uniform, mutually different areas having a certain distribution on the surface of the light pipe. The local outcoupling efficiency of the light pipe depends on the characteristic properties of the patterns, which are dependent on the distance to the light source or its wavelength.

Abstract: A method of producing an antireflection structure for use on a display or a window surface or both in an electronic device, such as a mobile phone. The display can be an LCD with a top polarizer and a bottom polarizer. The antireflection structure is imparted on the top polarizer by a roller embossing process. In particular, the embossing is carried out in the same manufacturing process when the polarizer is produced. The antireflection structure has a plurality of sub-wavelength periodic grooves. The antireflection structure on the window surface can be imparted using an embossing process or an injection molding process.

Abstract: A method of producing an antireflection structure for use on a display or a window surface or both in an electronic device, such as a mobile phone. The display can be an LCD with a top polarizer and a bottom polarizer. The antireflection structure is imparted on the top polarizer by a roller embossing process. In particular, the embossing is carried out in the same manufacturing process when the polarizer is produced. The antireflection structure has a plurality of sub-wavelength periodic grooves. The antireflection structure on the window surface can be imparted using an embossing process or an injection molding process.

Abstract: The invention relates to a method and an apparatus for manufacturing an optical coupling arrangement, and a specific coupling arrangement. A substrate waveguide (306) and at least one coupling element (304, 306) in the coupling arrangement are made of polymer material in the same replication process at the same time. At least one diffractive coupling element (304, 306) is then formed in the polymer material by placing the polymer material against a replication mould, which comprises a surface profile model of at least one diffractive coupling element (304, 306) that is patterned into the replication mould by means of micro lithography.

Abstract: A system and method is described for distributing light within a light guide which is used for illuminating the user interface of an electronic device. The light guide is formed as a thin film and impressed with a pattern of input and output diffraction gratings to control the transmission of light into and out of the light guide to efficiently illuminate the user interface.

Abstract: A method and device for improving lighting of a display having a top surface for viewing.

Abstract: A light source arrangement is used for providing illumination to an essentially planar area (405) in an electronic device. The arrangement comprises an encapsulated semiconductor light source (402) in the vicinity of an edge of an essentially planar light guide (404). Light emitted by the encapsulated semiconductor light source is to be coupled into the light guide through the edge. The encapsulated semiconductor light source comprises a semiconductor chip (301) encapsulated in an encapsulation block (302) that comprises a curved surface facing the edge of the planar light guide. The encapsulation block (302) has also a D-shaped cross section in a plane perpendicular to the plane of the essentially planar lightguide so that the arcuate part of the D corresponds to said curved surface. The encapsulation block extends to a predetermined distance in an extension direction locally perpendicular to the plane of said D-shaped cross section.