Abstract: A light guide plate for a backlight. The light guide plate includes: a light source unit for generating light; a light guide plate proximate to the light source unit and including an upper surface and a lower surface; and a light emission pattern configured to diffuse a portion of the light directed toward an image display panel, and a first straight pattern configured to channel the light along a direction substantially parallel to a direction of propagation of the light generated by the light source unit, both the light emission pattern and the first straight pattern being disposed on one of the upper surface and the lower surface of the light guide plate, in which the first straight pattern has peaks and valleys formed in alternating and repeating manner in a direction substantially perpendicular to a direction of propagation of the light generated by the light source unit.

Abstract: A backlight module includes a light guide plate, a light source disposed at a side of the light guide plate, a diffuser sheet positioned over the light guide plate but not directly contacting the light guide plate, and a light mixing space positioned between the light guide plate and the diffuser sheet so that light emitted from the light guide plate mixes in the light mixing space before being emitted out of the backlight module.

Abstract: A flat panel display uses pixels (2060) that are turned on or off by the enabling or disabling total internal reflection, TIR, of a light guide (2010). A reflective surface (2070) directs the switched light towards the viewer. An optional mask may be employed to provide extremely high contrast ratios in low and in high ambient lighting conditions. The elements (2080) that enable TIR may be enabled quickly because of their small size and weight, resulting in a very fast switching speed. The fast switching speed allows colors to be generated and displayed in a sequential manner.

Abstract: The backlight module comprises a light guide device, pluralities of light sources and at least one optical film. The light guide device further contains body, first microstructures, second microstructures, flat portions and diffusive beads. The first microstructures are disposed on reflective surface. A first point and a second point are disposed at two ends of the first microstructure with a first width (P1). Each flat portion has a gap (G) defined between two adjacent first microstructures. The second microstructure connects to the body by means of two edge portions. Two edge portions have a second width (P2) defined on the incident surface; wherein a first depth (H1) is defined to be the distance between the crossing point of two edge portions away from the incident surface. Pluralities of diffusive beads have weight Mb. The body has weight Mt. Then the equations of H 1 P 2 * P 1 G ? 0.288 and H 1 P 2 * P 1 G * M t M b ? 96.0 are satisfied.

Abstract: A light guide plate includes a light incident surface to which light is incident as incident light, an opposite surface formed opposite to the light incident surface, a light emitting surface through which the incident light is emitted, a rear surface formed opposite to the light emitting surface and including a prism pattern which reflects the incident light to the light emitting surface, and lateral surfaces, wherein a diffuse reflection pattern is formed on at least any one of the light emitting surface and the lateral surfaces to diffuse-reflect light incident to the lateral surfaces, thus rendering a brightness at both the opposite surface and the light incident surface substantially uniform.

Abstract: An illuminating apparatus includes a light source unit including a plurality of LED packages, a first prism plate arranged on the plurality of LED packages and having a prism pattern formed thereon, and a second prism plate provided on the first prism plate, and arranged such that a lengthwise direction of a prism pattern formed on the second prism plate crosses a lengthwise direction of the prism pattern of the first prism plate. A triangular shape in a cross-section of the prism pattern of each of the first and second prism plates is an isosceles triangle, and a height H and a bottom side length L of the isosceles triangle satisfy the following conditions that 0.1L?H?0.2L.

Abstract: An optical sheet includes a light-passing base sheet, a plurality of light-passing first patterns formed on a front major surface of the base sheet, and a plurality of light-passing second patterns formed on a rear major surface of the base sheet. The first patterns protrude from the front surface of the base sheet, a top portion of each of the second patterns makes contact with the rear surface of the second patterns while a larger lower surface of each of the second patterns is exposed to serve as a light receiving surface. Voids having relatively low refractive indices are formed between the light-passing second patterns. The optical sheet employs just one base sheet in one embodiment, thereby reducing a manufacturing cost of the optical sheet.

Abstract: A light guide plate for a surface light source device is provided, which includes an incident surface configured to have light from lamps disposed along a predetermined axis, be incident thereon, an emitting surface configured to have the incident light emitted therefrom, a back surface configured to face the emitting surface, and a plurality of unit cells configured to have microprism patterns engraved thereon and distributed and arranged on the back surface. A crossing angle of a microprism arrangement axis, formed by a ridge direction of the microprism patterns, and of an arrangement axis of the lamps is disposed in an alternate angle. The light guide plate has a high front brightness and an excellent uniformity in brightness and does not have a moire phenomenon. In a backlight unit, the use of optical sheets stacked on the light guide plate can be reduced.

Abstract: Light guides and backlight systems are disclosed that include one or more groups of geometric light redirectors whose arrangement and/or orientation across the surface of a light guide varies to improve light emission uniformity and to reduce visual artifacts.

Abstract: An optical member includes; an incident surface on which light is incident, an exit surface which is disposed substantially opposite the incident surface and from which the light exits, a prism pattern disposed on the exit surface, and a diffusion pattern which is aligned with the prism pattern and is disposed in a total internal reflection region in which the light incident on the incident surface is totally internally reflected by the prism pattern and output through the incident surface.

Abstract: An optical film for use in transparent displays, such as reflective LCDs. The optical film has three-dimensional, prismatic structures that reflect incoming light. The prismatic structures are configured so that the reflecting facets orient the reflected light in desired reflective light pattern. The pattern shape and intensity can be controlled by the shape and dimensions of the various reflecting facets. In one embodiment, the height of the prismatic structure varies along two dimensions of the structure.

Abstract: An illuminator is provided including: a light source unit composed of a point light source; a light guide plate including an incidence surface into which light emitted from the light source unit is introduced, and an exit surface out which the light that has been introduced from the incidence surface exits; and a prism body where a plurality of prisms are arranged so as to refract the light that has exited out from the exit surface of the light guide plate, wherein the prism body is arranged at a specific area on the entire exit surface of the light guide plate so as to refract part of the light that has exited out from the exit surface of the light guide plate.

Abstract: The present invention discloses a side-light type light guide plate assembly and a backlight module, which has a light guide plate and at least one reflector sheet. The light guide plate has a lower surface, a light output surface opposite to the lower surface, and at least one light input side surface connected between the lower surface and the light output surface. The reflector sheet is correspondingly disposed on at least one side surface of the light guide plate except for the light input side surface, while a medium layer is defined between the reflector sheet and the light guide plate. The refraction index of the medium layer is smaller than or equal to 1.12. By providing the air layer and the reflector sheet, light beam emitting out of a side of the light guide plate and going back to the light guide plate can meet conditions of total reflection, so as to prevent from generating a light leakage phenomenon at edges of the light guide plate.

Abstract: An exemplary prism sheet includes a base including an upper surface and a plurality of lenses disposed on the upper surface. The upper surface is a wavy surface. A liquid crystal display device using the prism sheet is also provided.

Abstract: A light guide plate shaped substantially like a plate includes a light incident surface, a light exit surface and a reflective surface, which is opposite to the light exit surface, configured to reflect light toward the light exit surface. A plurality of optical units is arranged along the reflective surface in a direction orthogonal to the light incident surface. Each optical unit is shaped substantially like a quadratic prism that is convex toward the reflective surface and has a top surface and two slopes being formed opposite to each other with respect to the top surface. A dimension of the top surface is constant in a direction of arrangement of the optical units and an interval between adjacent optical units becomes greater as the adjacent optical units lie further away from the light incident surface in the direction of arrangement of the optical units.

Abstract: Light guides and backlight systems are disclosed that include one or more groups of geometric light redirectors whose arrangement and/or orientation across the surface of a light guide varies to improve light emission uniformity and to reduce visual artifacts.

Abstract: Improved apparatus and method for collecting and directing light from a source via a light guide and modulated display assembly in an efficient manner through the design and use of prismatic optical structures, diffusers and/or light redirectors.

Abstract: An illumination apparatus includes a light guide plate having a plurality of first and second diffusion net points formed on a surface of a light transmissive substrate, and at least one light emitting element disposed to emit light into a light incident surface of the light guide plate. A portion of the first diffusion net points at least partially overlaps the second diffusion net points, and the size of the first diffusion net points is smaller than the size of the second diffusion net points.

Abstract: There is provided an illuminator comprising: a light source that radially emits white lights in a forward direction; and a lens sheet that is arranged facing the light source and that has a plurality of prisms on one side thereof concentrically at an optical axis so as to control orientation of the white lights that are emitted from the light source, wherein the light source is composed of: a luminous element that emits lights with a predetermined wavelength; and a sealing body that covers the luminous element and that includes phosphors therewith, the phosphors being adapted to receive the lights with the predetermined wavelength which are emitted from the luminous element so as to emit fluorescence, and the lens sheet includes prisms that have focal distances each different from the prisms adjacent thereto.

Abstract: A light guide plate includes a first surface, a second surface, at least a light incident surface, and a plurality of groove sets. The second surface is opposite to the first surface. The light incident surface connects the first surface and the second surface. The groove sets are separately disposed on the second surface. Each of the groove sets includes a plurality of curved grooves. Each of the curved grooves has a curved inclined reflective surface and a curved light-back-surface. The curved inclined reflective surface is inclined with respect to the first surface. The curved grooves of each of the groove sets curve towards a same curving direction. The curved inclined reflective surface of one of two curved grooves is connected to the curved light-back-surface of the other one of the two curved grooves. A backlight module is also provided.

Abstract: To prevent, in a backlight where light emitting diodes are arranged on a side surface of a light guide plate, light leakage from a reflection sheet and reduce non-uniformity of emission light from the backlight. In a liquid crystal display device that includes a backlight that irradiates a liquid crystal panel with light, LEDs are disposed as light emitting elements on a light guide plate that is disposed in the backlight, a reflection sheet that comprises a multilayer film is disposed on a bottom surface of the light guide plate, projections are disposed by sandblasting on the bottom surface of the light guide plate in the vicinity of the LEDs, and tight adhesion between the reflection sheet and the light guide plate is prevented. In the vicinity of the LEDs, in order to counter light non-uniformity, reflecting grooves are not disposed and it is a mirror surface, but tight adhesion can be prevented by disposing the projections.

Abstract: The invention relates to an LGP and a back light module thereof, wherein the LGP comprises a light input surface, a bottom surface and a light output surface opposite to the bottom surface, and is characterized in that the bottom surface and/or the light output surface is provided with a plurality of microstructures, distribution rules for microstructures along the direction parallel to the light input surface of the LGP are: the microstructures in the middle of the LGP are closely arranged, and the microstructures on the two sides are sparsely arranged. In the LGP provided in the invention, the light output in the direction parallel to the light input surface can reach the brightness distribution with high middle and low edges, thereby achieving higher efficiency of light energy utilization.

Abstract: A light source module includes a housing receiving a light source. The housing includes a transparent light emitting plate with a micro structure positioned on an outer surface thereof. The micro structure includes a number of first and second light guide projectors. The first light guide projectors are positioned at a middle part of the outer surface, the second light guide projectors are positioned at two end parts of the outer surface. The first and second light guide projectors extend along the outer surface and are perpendicular to each other, cross-sectional surfaces of the first light guide projectors perpendicular to the extending direction of the first light guide projectors are semi-circular-shaped, and cross-sectional surfaces of the second light guide projectors perpendicular to the extending direction of the second light guide projectors are triangular-shaped. An illuminating device including the light source module is also provided.

Abstract: A light guide plate (LGP) includes a first surface, a second surface, and a plurality of light incident surfaces. The first surface is a light-emitting surface. The light incident surfaces connect the first surface and the second surface. The second surface has a plurality of ring-shaped grooves. Depths of the ring-shaped grooves are gradually decreased from a place close to a center of the LGP towards places close to the light incident surfaces. Each of the ring-shaped grooves has a first ring-shaped side wall surface and a second ring-shaped side wall surface. The second ring-shaped side wall surface is opposite to the first ring-shaped side wall surface and located between a geometry center of the ring-shaped groove and the first ring-shaped side wall surface. The first ring-shaped side wall surface is a tilted surface. In addition, a light source apparatus is also provided.

Abstract: A light guide plate (11) has: a light incidence surface (11c) through which light from a light source enters the light guide plate; a back surface (11b) for changing a direction of the light which has entered the light guide plate (11) through the light incidence surface (11c); and a light exit surface (11a). The back surface (11b) has a plurality of dot holes (12) each of which has an inclined surface for changing the direction of the light which has entered the light guide plate (11) through the light incidence surface (11a), and an angle ? between the inclined surface of each of the plurality of dot holes 12 and the back surface satisfies 53°???56°.

Abstract: A backlight device for a liquid crystal display containing a substantially planar light guide with a light emission surface and a light-collecting portion opposing the light emission surface. A pair of opposing side portions may define the periphery of the light guide. A first plurality of LEDs are placed so as to direct the emitted light into the light-collecting portion. An NVIS filter is preferably placed adjacent to at least one of the side portions. A second plurality of LEDs are placed to direct the emitted light through the NVIS filter and into a side portion of the light guide. Alternative embodiments can contain NVIS filters and LEDs along additional edge portions of the light guide. Some embodiments may use directing elements or slanted surfaces of the light guide to direct the light from the second plurality of LEDs into the edge portions of the light guide.

Abstract: A backlight module includes a light guide plate with a main body and a light source with a circuit board and a plurality of light bars. The main body has a light incidence surface and a light emitting surface. The light incidence surface has a plurality of accommodating grooves and the light emitting surface or the light incidence surface has a plurality of light-separation grooves which are perpendicular to the accommodating grooves. The accommodating groove has a first and a second light incidence parts. A reflecting layer is disposed on the surface of the circuit board being located between each two light bars. The light source is disposed on the light incidence surface and light bars are disposed for the accommodating grooves so as a predetermined distance located between the light bar and the second light incidence part is formed a light mixing space to reduce the production of bright lines.

Abstract: A backlight that includes a front reflector and a back reflector that form a hollow light recycling cavity including an output surface is disclosed. The backlight further includes one or more light sources disposed to emit light into the light recycling cavity. The front reflector includes an on-axis average reflectivity of at least 90% for visible light polarized in a first plane, and an on-axis average reflectivity of at least 25% but less than 90% for visible light polarized in a second plane perpendicular to the first plane.

Abstract: An LED light source is mounted to a base end of a light guide lens including a distal end curving toward the rear of a vehicle and a functional light distribution portion including light diffusion steps, so that light from the LED light source is diffused toward a side of the vehicle. A design light distribution portion is provided between the LED light source and the functional light distribution portion, having a linear optical step on a rear surface of the light guide lens so as to extend in a longitudinal direction of the lens.

Abstract: Improved apparatus and method for collecting and directing light from a source via a light guide and modulated display assembly in an efficient manner through the design and use of prismatic optical structures, diffusers and/or light redirectors.

Abstract: An LED backlight module includes at least one LED and a light guide plate. The light guide plate includes a light incident surface, a light emitting surface connected to the light incident surface, and a bottom surface parallel to the light emitting surface. The at least one LED is placed on the light incident surface and spaced at regular intervals. The light from the at least one LED enters the light guide plate from the light incident surface and is reflected to the light emitting surface by the bottom surface. The light guide plate defines a plurality of concave dots on the bottom surface. The bottom surface is divided into a plurality of discontinuous dot zones. In the dot zone closest to the incident surface, proximity of the dot to the LED decreases the depth and the distribution density of the dots.

Abstract: A prism sheet having a function for preventing damage while assuring light collecting performance, and a liquid crystal display employing it. The prism sheet (6) has a first major surface on which light from a light source impinges, and a second major surface from which the incident light exits. A plurality of first prism rows (6a) having triangular cross-section are formed in parallel on the second major surface. A plurality of second prism rows (6b) having a round top and higher than the first prism rows (6a) are also provided on the second major surface.

Abstract: The main body of the main unit has a light-receiving surface, a light-reflecting surface, and a light-projecting surface. The reflecting unit includes a plurality of reflecting microstructures formed on the light-reflecting surface. Each reflecting microstructure has a first reflecting curved surface, and the first reflecting curved surface of each reflecting microstructure has a first reflecting curved line shown on the lateral surface thereof. The first reflecting curved line of each first reflecting curved surface is substantially composed of a first base point as an initial point on the first bottom portion of the light-reflecting surface, a second base point as an end point on the second bottom portion of the light-reflecting surface, and a first curve track connected from the first base point to the second base point and passing through a plurality of first trajectory points.

Abstract: An ultra thin lighting element including at least one light source. A lightguide element includes one lightguide layer comprising a plurality of discrete fine optic surface relief structures on at least one portion of at least one surface. Each surface relief structure includes basic structural features on the order of about 10 microns or less in height, and on the order of about 10 microns or less in each lateral dimension. The number, arrangement and size of each surface relief structure and height and lateral dimensions of the structural features of the surface relief structures being varied to provide a desired degree of outcoupling modulation of light incoupled into the light guide element.

Abstract: A light source module including a light guide plate (LGP) and a light source device is provided. The LGP has a light exiting surface, a light reflecting surface opposite to the light exiting surface and at least one light entering surface connecting the light exiting surface and the light reflecting surface. The LGP has light reflective structures disposed on the light reflecting surface and each including a closed light active region and protrusions disposed in the light active region. The light active region and the light reflecting surface are not coplanar. The protrusions extend outward from the LGP. The light source device is disposed corresponding to the light entering surface. The light source device provides a light entering the LGP from the light entering surface and exiting the LGP from the light exiting surface after the light is redirected by one of the protrusions on the light reflecting surface.

Abstract: It is aimed to provide an LCD backlight device and liquid crystal display that can suppress light quantity loss and ensure uniform brightness. An LCD backlight device 101 has a laser light source 1 that emits laser light, and a light guiding plate 3 that transforms the laser light from the laser light source 1 into linear laser light, and transforms the linear laser light into a planar laser light, and emits the planar laser light, and the light guiding plate 3 has a third side face 6 that transforms the linear laser light into the planar laser light by reflecting the linear laser light by a plurality of reflection surfaces that are formed along the entrance direction of the linear laser light.

Abstract: A surface light source device can be configured to increase front luminance as compared to certain conventional light sources. The surface light source device can include a light guiding plate having a first end surface and a second end surface, a light exiting surface formed to have a light exiting portion and a tapered surface disposed opposite to the light exiting surface. A light source can be disposed along the first end surface of the light guiding plate, and a reflection sheet can be disposed on the tapered surface of the light guiding plate. A prism sheet having a prism surface can face toward the light exiting portion of the light guiding plate. The light exiting portion can be disposed a predetermined entrance length away from the first end surface along the light exiting surface so that the light exiting surface can form a predetermined taper angle with the tapered surface.

Abstract: A light guide plate includes an incident face, a bottom surface, a main reflective structure and an auxiliary reflective structure. The bottom surface is connected to the incident face. The main reflective structure is disposed on the bottom surface and has a first and a second inclined surface. The auxiliary reflective structure is disposed on the bottom surface and has a third and a fourth inclined surface. The auxiliary reflective structure and the main reflective structure have an interval therebetween, in which the interval ranges between 0.2 micrometer and 0.5 micrometer, and a bottom width of the auxiliary reflective structure on the bottom surface is smaller than a bottom width of the main reflective structure on the bottom surface. A liquid crystal display is also disclosed herein.

Abstract: According to one embodiment, a liquid crystal display includes a display module and a backlight module configured to irradiate light on the display module. The backlight module includes a light guide plate, a first light source, a reflective plate, and a second light source. The light guide plate has a light output face at a position corresponding to a first small area on the display module. The first light source is configured to irradiate light toward the light guide plate from a side of the light guide plate in such a manner that the irradiated light reaches the first small area. The reflective plate is facing to the light guide plate, and the reflective plate has a reflective face configured to reflect light toward a second small area different from the first small area. The second light source is configured to irradiate light toward the reflective plate from a side of the reflective plate in such a manner that the irradiated light reaches the second small area.

Abstract: Provided is an illuminating device including a plurality of light sources. Micro prisms are provided in an opposed surface of a light guide plate. Each of the micro prisms is provided so that a reflective surface has a bottom side located at substantially 90 degrees with respect to an optical path of a beam from any one of the light sources. In a display device including a liquid crystal panel illuminated by the illuminating device, at least two micro prisms are provided in each area overlapped with aperture portions of the liquid crystal panel.

Abstract: A light guide plate includes a main body, a main reflective structure and an auxiliary reflective structure. The main reflective structure has a first included angle and a second included angle with respect to a bottom surface of the main body. The auxiliary reflective structure is adjacent to the main reflective structure and has a third included angle and a fourth included angle with respect to the bottom surface. A height difference between the main reflective structure and the auxiliary reflective structure ranges between 1.5 micrometer and 5 micrometer, and a bottom width of the auxiliary reflective structure on the bottom surface is smaller than a bottom width of the main reflective structure on the bottom surface. A liquid crystal display is also disclosed herein.

Abstract: A backlight unit (3) provided with a LED package (light source) (11) and a light guide plate (14) includes a light-emitting portion (12) that is provided on the light guide plate side of the LED package (11) so as to be opposed to an incident surface (14a) of the light guide plate (14) and outputs light from the LED package (11) toward the light guide plate (14). A dimension on the incident surface side of the light-emitting portion (12) in a thickness direction of the light guide plate (14) is not more than a dimension at the incident surface (14a) of the light guide plate (14) in its thickness direction, and the light-emitting portion (12) uses a two-dimensional photonic crystal (12a).

Abstract: The present invention relates to a manufacturing method of a display apparatus having a display portion that is made of dot-like reflection portions. The method comprising steps of: heating at least one of a blade portion of a machining tool and a light guide plate, descending the machining tool along a specific formation direction of the blade portion all through this descending step to press the blade portion into a back surface of the light guide plate, ascending the machining tool along a specific formation direction of the blade portion all through this ascending step to pull out the blade portion from the light guide plate, moving the machining tool horizontally, and arranging at least one light source along at least one edge face of the light guide plate. The steps of descending, ascending, and horizontally moving the machining tool are performed repeatedly to form the dot-like reflection portions.

Abstract: Disclosed are an optical sheet, which includes a prism pattern having condensing axes crossing each other in diagonal directions with respect to an arrangement direction of light sources, thereby achieving an enhanced contrast ratio without a reduction in viewing angle and an increase in costs, and a backlight unit using the same. The optical sheet includes a plurality of crossed prism patterns each having a first condensing axis and a second condensing axis crossing each other in diagonal directions with respect to an arrangement direction of a light source.

Abstract: The present invention discloses a light guide plate and a backlight module having the same. The light guide plate includes a light emitting surface, a light incident surface, a light reflecting surface, and a plurality of prisms disposed on the light reflecting surface. The disposition direction of the prisms can be parallel or perpendicular to the lengthwise direction of the light reflecting surface. An inclined angle may exist between the disposition direction of the prisms and the lengthwise of the light reflecting surface. The backlight module includes a light guide plate, a light source, and an optical film set, wherein the light source is disposed near the light incident surface. The optical film set partially covers the light emitting surface, wherein a distance exists between a vertex of the prism and an edge of the optical film set.

Abstract: A backlight is provided for illuminating an at least partially transmissive display. The backlight includes a light source. A light guide receives the light from an edge surface and guides the light by total internal reflection. The light extracted from the lightguide has an angular emission profile such that when incident on a prism film, collimated light is produced.

Abstract: A planar light source device capable of increasing light use efficiency and preventing color breakup without using any reflection polarizing plate nor performing multiple reflection. The planar light source device includes a planar light guide plate, light sources arranged as to be opposed to end surfaces of the light guide plate on its both sides, and a divided prism formed in a back surface inside the light guide plate and that reflects light incident upon the light guide plate from the light sources toward a front surface side of the light guide plate. The divided prism includes a prism portion and a dividing portion both of which have a width equal to or less than the wavelength of light from the light sources and is formed with the prism portion and the dividing portion alternately repeated along a direction parallel to the end surfaces of the light guide plate which are opposed to the light sources.

Abstract: A light emitting assembly comprises a light source and a light emitting panel member having a panel surface and an input edge for receiving light from the light source. On or in the panel surface is a pattern of individual light extracting deformities. Each of the deformities has a well defined shape and a length and width substantially smaller than the length and width of the panel surface. At least some of the deformities have only two surfaces, each having opposite peripheral edge portions that intersect each other and intersect the panel surface. One of the surfaces of the deformities is substantially perpendicular to the panel surface and is curved in a transverse direction. The other surface of the deformities is a sloping surface.

Abstract: A light guide element, a light source module, and a display are provided. The display includes a display panel and the light source module. The light source module includes a light source and the light guide element, wherein light emitted by the light source is guided toward the display panel by the light guide element. The light guide element includes a plurality sidewalls and a bottom wall. The sidewalls surround the bottom wall and are connected with each other to form a light entering opening, a light exiting opening, and an inner reflection room. Each of the sidewalls and the bottom wall has at least one reflection surface, wherein the reflection surface faces the inner reflection room.

Abstract: An ultra thin lighting element including at least one light source. A lightguide element includes one lightguide layer comprising a plurality of discrete fine optic surface relief structures on at least one portion of at least one surface. Each surface relief structure includes basic structural features on the order of about 10 microns or less in height, and on the order of about 10 microns or less in each lateral dimension. The number, arrangement and size of each surface relief structure and height and lateral dimensions of the structural features of the surface relief structures being varied to provide a desired degree of outcoupling modulation of light incoupled into the light guide element.