Abstract: A light guide plate (LGP) (3) includes a transparent plate (31) and a waterproof layer (32). The transparent plate has a light emitting surface (311) on a top thereof, and a bottom surface (312) opposite to the light emitting surface. The waterproof layer is disposed over the light emitting surface. A preferred method for fabricating the LGP includes the steps of: (a) providing an transparent plate having a light emitting surface on a top thereof and a bottom surface opposite to the light emitting surface; and (b) forming a waterproof layer over the light emitting surface.

Abstract: A method for manufacturing a light guide plate (41, 51, 61) includes the steps of providing a mold (20), melting resin material and mixing an inert gas into the molten resin material, injecting the mixture of the molten resin material and the inert gas into a cavity (26) of the mold, cooling the mold under a constant pressure, and demolding and taking the light guide plate out from the mold. The inert gas decreases the viscosity of the molten resin material, so that the light guide plate is formed with high uniformity. In addition, because the molten resin material is mixed with the inert gas, the formed light guide plate is lighter in weight. Moreover, no printing process is required. This means that the time needed for production is shortened, and the costs of producing the light guide plate is reduced.

Abstract: A backlight system (100) in accordance with the present invention includes a plurality of light sources (110) for emitting light beams and a light guide plate (120) for receiving the light beams emitted by the light sources. The light guide plate includes a light input surface (121) and a light output surface (122) joining the light input surface. The light input surface has a plurality of recesses (124) therein. The recesses have cylindrical surfaces, each having a specific curvature, and the light beams emitted by the light sources pass through the cylindrical surfaces orthogonally. Since nearly all of the light beams enter into the light guide plate with few being reflected at the light input surface, the backlight system is highly efficient in light utilization.

Abstract: A light guide plate (10) includes a transparent plate (20), a plurality of diffusing protrusions (30) and a plurality of dots (40). The transparent plate includes an emitting surface (21), and a bottom surface (23) opposite to the emitting surface. The diffusing protrusions are distributed on the emitting surface of the transparent plate, and are integrated with the transparent plate. The dots are distributed on the bottom surface of the transparent plate. The light guide plate provides high emitting brightness and uniformity. The diffusing protrusions can diffuse light beams emitting from the emitting surface of the transparent plate, in order to achieve a plane light source having even brightness. Moreover, the dots on the bottom surface can scatter and reflect incident light beams, so as to totally eliminate internal reflection of light beams and make the light beams evenly emit from the emitting surface.

Abstract: A polarized light source system (20) includes a light guide plate (22), a light source (24), a lamp cover (25), a quarter wave plate (23), an upward prism plate (26) and a downward prism plate (28). The light guide plate defines an optical inputting surface and an optical outputting surface interconnecting therewith. The light source and the lamp cover are stationed next to the optical inputting surface. The upward prism plate stationed next to the optical outputting surface defines a plurality of upward micro-prisms (262) on a surface opposite thereto. The downward prism plate stationed next to the upward prism plate includes a brightness enhancing film (284), and a plurality of downward micro-prisms (282) on a surface facing the upward prism plate. The upward and downward micro-prisms engaged with each other. The quarter wave plate includes a reflective film on a backing surface.

Abstract: A light guide plate (2) into which light beams are introduced from a light source (41) includes an incident surface (20) receiving the light beams from the light source; a light emitting surface (22) transmitting light beams outwardly; a bottom surface (21) opposite the light emitting surface for reflecting the light beams to the light emitting surface; and a plurality of sidewalls (24, 26, 28) perpendicular to the light emitting surface. The sidewalls have frosted surfaces for reflecting the light beams to assure output of the light beams through the light emitting surface.

Abstract: A gas discharge display for emitting light by discharging a discharge gas confined in a discharge space (25) utilizes electrodes (12, 12′, 22) to produce ultraviolet light and utilizes the ultraviolet light to irradiate a phosphor layer (23) to produce visible light. The discharge gas is a gas mixture including neon and krypton, where a proportion of the krypton is 1.1 to 5% by volume of the gas. A pressure of the gas is kept within a range of 250 Torr to 500 Torr.

Abstract: A backlight system (10) in accordance with the present invention includes a light guide plate (20) and two light sources (30) disposed adjacent opposite sides of the light guide plate. The light guide plate includes two incident surfaces (21), a light exit surface (22) and a bottom surface (24) opposite to the light exit surface. The bottom surface has a plurality of diffusion units (23) therein, and a reflective film (241) thereon. Diffusion surfaces (25) of the plurality of the diffusion units cooperate with each other to form a curved face for directing light beams to be output from the light exit surface in a predetermined angular range.

Abstract: The present invention provides a surface light source (6) using a light guide plate (2) to illuminate a liquid crystal display. The light guide plate comprises a light incident surface (21), a light-emitting surface (22) perpendicular to the light incident surface, a bottom surface (23) opposite to the light-emitting surface, and a plurality of side surfaces. An anti-reflective coating is formed on the light incident surface and the light-emitting surface. A reflective coating is formed on the bottom surface and at least one of the side surfaces. The light guide plate provides a high luminace output for the liquid crystal display.

Abstract: A tunable filter device (10) has a plurality of input waveguide channels (141, 142, 143), a plurality of output waveguide channels (161, 162, 163) and a Bragg grating (13) which are formed in a planar waveguide (111). Every input waveguide channel couples with the Bragg grating at a different angle, and every output waveguide channel is a mirror image of a particular input waveguide channel. When input light transmits through a particular input waveguide channel, light of a particular wavelength is reflected by the Bragg grating to a corresponding, mirror image output waveguide channel.

Abstract: A backlight system (300) includes a light guide plate (3024), a reflection plate (3023), a light source (3021) disposed at one side of the light guide plate, a diffusion plate (3025) and a reflection polarizer (3027), which lets light polarized in one certain direction pass, and reflects light polarized in a polarization direction perpendicular to the said certain direction. The reflection plate, the light guide plate, the diffusion plate, and the reflection polarizer are stacked up one on top of the other. A plurality of prisms (1) is disposed on a surface of the diffusion plate, which forms a plurality of V-shaped grooves (not labeled).

Abstract: A tunable optical wavelength demultiplexer (10) has a plurality of demultiplexer units (113, 114, 115, 116) formed on a planar waveguide (111). Every demultiplexer unit comprises a plurality of input waveguide channels, a plurality of output waveguide channels, and a Bragg grating, said each input waveguide channel coupling with the Bragg grating at a different angle, and each output waveguide channel being a mirror image of a corresponding input waveguide channel. Bragg gratings of demultiplexer units are parallel each other. Corresponding input waveguide channels are parallel to each other. An adjustable mechanism (100) adjusts an input port (25) and output ports (271, 272, 273, 274) to couple with a desired input waveguide channel and corresponding output waveguide channels.

Abstract: A light guide plate (20) includes a light input end (21), a light output face (23) adjacent the light input end, and a back face (22) opposite to the light output face. A plurality of fine dots (26) are formed on the back face arranged in a uniform, rectangular array. The dots in a same column have a same size. The dots in a same row increase in size. A radius r of the dots in each row thereof varies as a function of a column number X of a given dot, in accordance with the formula: r=A+BX+CX2+DX3+EX4+FX5, wherein: the column number X varies in consecutive whole numbers from a value of one for the column nearest the light input end to a maximum value for the column most distal from the light input end; and A, B, C, D, E, and F are constants.

Abstract: A backlight system of the present invention includes a light guide plate (300) and a light source (310) disposed at one side of the light guide plate. The light guide plate has an incident surface (321) for receiving light from the light source, a bottom surface (323), and a light emitting surface (322) for emitting light therethrough. A plurality of prisms (350), each in a shape of a pyramid, are formed on the light emitting surface. A plurality of diffusion dots (324) are formed on the bottom surface.

Abstract: A polymer-based waveguide device is for use in an optical amplifier or as a laser waveguide. The waveguide device includes a substrate (1), a polymer bottom cladding layer (21) on the substrate, a polymer channel waveguide (3) on the bottom cladding layer, and a polymer top cladding layer (22). The channel waveguide is doped with at least one kind of rare earth metal ion that can be excited to produce a laser. The bottom and top cladding layers have a same refractive index, which is substantially lower than a refractive index of the channel waveguide. When a light signal is input to the waveguide device, an amplified light signal is obtained and is transmitted within the channel waveguide.

Abstract: A light guide plate (3) includes a parallelepiped block. The block includes an input surface (31) for receiving light beams irradiated from a light source; two side surfaces perpendicularly adjoining the incident surface; an output surface (32) perpendicularly adjoining the incident surface and the side surfaces; and a bottom surface (33) opposing to the output surface. An array of prisms (34) is integrally formed on the output surface. Each prism is shaped as a square pyramid. All the prisms have a same size and are arranged contiguously with each other. Alternatively, the light guide plate may be a wedge-shaped block (3′). A rectangular array of prisms (34′) is integrally formed on an output surface (32′) thereof. Each prism is shaped as a square pyramid. The prisms are arranged contiguously with each other, and sizes of the prisms gradually decrease from a thick end to a thin end of the block.

Abstract: A DWDM thin film filter includes a glass substrate (11) and a film stack (12). The film stack includes a plurality of cavities (13). Each cavity includes a first group of mirror layers (21), a second group of mirror layers (22), and a spacer layer (23). Each group of mirror layers includes a plurality of high refractive index thin films (31) and low refractive index thin films (32) alternately deposited one on another. The material of the high refractive index films is a composition of niobium oxide, namely Nb2O5-X. The value of x ranges from 0 to 0.5, which yields a refractive index ranging from 2.15 to 2.40. A thin film filter having 140 layers of film can be produced according to the preferred embodiment. Such thin film filter attains the same or better optical characteristics compared to a conventional DWDM thin film filter having 180 layers of film.

Abstract: A magnetic recording media is formed with high in-plane coercivity employing dual magnetic layers. The first magnetic layer is sputter deposited in a chamber employing a shield such that the minimum incident angle of impinging atoms is relatively large, e.g., greater than about 26°. Embodiments of the present invention comprise depositing a NiAl seedlayer, a Cr or Cr alloy underlayer and a first CoCrTa magnetic layer at a thickness less than about 50 Å for inducing the preferred (10.0) crystallographic orientation in the subsequently deposited second magnetic layer, e.g., CoCrPtTa or CoCrPtTaNb having a high Cr content of about 16 to about 21 at. %.

Abstract: A piezoelectric tunable filter (10) includes a ring (12) made of piezoelectric material surrounding a thin film waveguide (14), and an actuator (17) surrounding the ring. The actuator generates acoustic waves which apply external radial forces on the ring. Because the ring has piezoelectric properties, a periodic, high frequency piezoelectric signal can be generated by the ring and input to the waveguide to produce lattice vibration of the waveguide. The vibration can generate a fluctuating pattern of refractive index in the thin film waveguide due to the modulating effect of the signal. Thus, a periodic radial force of a predetermined frequency produces a desired vibration of the thin films of the waveguide, which in turn produces a desired refractive index in each film, which accordingly changes an optical thickness of each film.

Abstract: Sputter-deposited amorphous NiNb films on glass or glass-ceramic substrates have good adhesion with the substrates, and reduce lithium migration significantly. Longitudinal magnetic recording media deposited on oxidized NiNb sealing layers have very good magnetic recording performances and are suitable for high density recording application.