Abstract:
A lens for use in a lighting arrangement, such as an LCD backlight, includes a light guiding region and a lens surface. The light guiding region is shaped to focus light from a light source toward a region of the lens located on its periphery. The lens surface has reflection regions for reflecting light from the light source back into the lens and transmission regions for transmitting light from the light source outside the lens. A characteristic of the transmissions regions, such as width, varies as a function of the location of the light source so as to create substantially uniform average light distribution for areas of the lens positioned at various distances with respect to the light source.
Abstract:
Disclosed herein is a light guide plate. In the light guide plate according to the present invention, a plurality of inclined regular reflecting surfaces, which is arranged in a direction perpendicular to incident light, is formed on the bottom surface of the light guide plate in the direction of the incident light.
Abstract:
A picture element lamp (302) is disclosed that mixes light from LEDs in a light guide (404). The light guide expands the perceived light source and can redirect the light toward viewing locations.
Abstract:
A primary object of this invention is to provide a new structure of DSF mold for backlight system made by assembling multiple blade molds to function as a master stamp, which will decrease the manufacturing cost because the mold will be modified easily when a failure occurs in manufacturing process, due to its assembling characteristics. In carrying out the invention, there is provided; A mold system for manufacturing light guide plate comprising : at least one base mold supporting multiple blade molds; a set of multiple blade molds disposed in parallel and supported by said base mold, wherein edge shape of each blade mold is sharp for forming grooves on a surface of light guide plate; at least one assembly hole formed on sides of each blade mold; at least one assembling means that penetrate said assembly hole in series of all blade molds; and fixture means for compressing both sides of said set of blade molds to secure portions of said blade molds, positioned at each end of said assembling means.
Abstract:
A front light (100) and reflection liquid crystal display including a pointlike light source (101) and a light guide (104) which has an incidence face (104a) on which light from the light source (101) is incident and an emergence face (104b) from which the light incident on the incidence face is emergent. The light from the light source (101) is a linear beam at least when the light is incident on the incidence face (104a). The light is free from shade from the light source (101), the moiré fringes and uneven brightness distribution. Therefore, the front light (100) provides bright illumination, can be produced at low cost, and operates with small power consumption, and a reflection liquid crystal display having such a front light is provided.
Abstract:
A front light (100) and reflection liquid crystal display including a pointlike light source (101) and a light guide (104) which has an incidence face (104a) on which light from the light source (101) is incident and an emergence face (104b) from which the light incident on the incidence face is emergent. The light from the light source (101) is a linear beam at least when the light is incident on the incidence face (104a). The light is free from shade from the light source (101), the moiré fringes and uneven brightness distribution. Therefore, the front light (100) provides bright illumination, can be produced at low cost, and operates with small power consumption, and a reflection liquid crystal display having such a front light is provided.
Abstract:
A rear signal lamp (10) of an automotive vehicle comprising a lamp housing (14) and a curved cover lens (22) for enclosing a thin light managing system (12). The thin light managing system (12) includes a plurality of backlight light-emitting diodes (28) mounted in a light mounting substrate (30) and secured to the lamp housing (14). A control module (34) operatively connected to the light-emitting diodes (28) for controlling the operation and illumination of the light-emitting diodes (28). A reflector matrix (36) having a plurality of reflector cones (38) corresponding to each of the light-emitting diodes (28) in the mounting substrate (30) and a hybrid optics panel (40) having a direct lensing section (42) covering the reflector matrix (36) and light-emitting diodes (28) and a double redirecting light pipe section (44) surrounding the lensing section (42). A single light-emitting diode (28) is coupled along spaced apart quadrants (98, 100, 102, 104) of the redirecting light pipe (44). Each single light-emitting diode (28) emits light to the respective quadrant of the optics panel (40) which is reflected and redirected from one or more lens facets to illuminate the front surface of the panel. The direct lensing section (42) and redirecting light pipe (44) illuminate distinct area on the curved cover lens (22).
Abstract:
An imaging directional backlight apparatus including a waveguide, a light source array, for providing large area directed illumination from localized light sources. The waveguide may include a stepped structure, in which the steps may further include extraction features optically hidden to guided light, propagating in a first forward direction. Returning light propagating in a second deflected direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. Viewing windows are formed through imaging individual light sources from the side of the waveguide and hence defines the relative positions of system elements and ray paths. A directional backlight with small footprint and low thickness may be provided.