Coretronic Corporation

Wen-Bin Chou

Tzeng-Ke Shiau

Teng-Chao Hou

Ching-Shiang Li

Ming-Dah Liu

Chih-Jen Tsang

Der-Woei Hsaio

An optical film is applied to a side-emitting backlight module. The side-emitting backlight module has a light guide plate for guiding a chief light beam. The light guide plate has a light emitting surface to define a normal direction thereof. The optical film includes a lower prism structure, an intermedium layer, and an upper prism structure. The lower prism structure is disposed on the light emitting surface. The intermedium layer is connected between the lower prism structure and the upper prism structure. When the chief light beam exits from the light emitting surface of the light guide plate, and then goes through the lower prism structure, it goes through the intermedium layer along a changed traveling direction. When the chief light beam exits from the intermedium layer, and goes through the upper prism structure, it turns from the changed traveling direction to the normal direction.

Optical film applied to a side-emitting backlight module

A projection screen is adapted to reflect the projection light generated by a projector. The projection screen includes a light absorbing layer, a light reflection layer connected adjacently to the light absorbing layer, and a light transparent layer. The light transparent layer is disposed on the light absorbing layer and the light reflection layer, and has a total reflection surface, a light emitting surface, and a light incident surface connected adjacently to the total reflection surface. The light incident surface provides a theoretical light convergence point, and the light convergence point and the location of the light reflection layer are in mirror symmetry relative to the total refection surface. The projection light enters into the light transparent layer through the light incident surface for refraction, and travels to the total reflection surface for totally reflection, and then to the light reflection layer for reflecting to the light emitting surface.

Projection screen

A direct type illuminating device includes a light source unit, a reflector plate, a diffuser plate, and a lens module. The light source unit provides source light beams. The reflector plate and the diffuser plate are spaced at an interval from each other, and the light source unit is interposed between the reflector plate and the diffuser plate. The lens module surrounds the light source unit such that the lens module is interposed between the light source unit and the reflector and diffuser plates. An outer curved surface of the lens module has a radius of curvature different from a radius of curvature of an outer curved surface of the light source unit such that the source light beams provided by the light source unit are refracted by the lens module to result in change of traveling directions of the source light beams.

Direct type illuminating device

An optical multilayer film includes first and second optical layers, and a refracting layer. The first optical layer has a light-exit surface. The second optical layer has a light-incoming surface facing the light-exit surface of the first optical layer, and a light-outgoing surface opposite to the light-incoming surface and formed with a light-converging structure. The refracting layer is disposed between and is in contact with the first and second optical layers, is made from a transparent material, and has a refractive index that is smaller than that of the second optical layer.

Optical multilayer film and a backlight module utilizing the same

A light emitting module including a light source set and a light guide member is provided. The light source set is suitable for providing a light and the light guide member is disposed above the light source set. The light guide member has a top surface, an opposite light incident surface, a first reflection surface, and an opposite light emergent surface connected between the top surface and the light incident surface. The top surface has a first concave surface serving a second reflection surface suitable for reflecting the light. Besides, a portion of the light reflected by the second reflection surface emerges from the light emergent surface through the reflection of the first reflection surface, and the other portion of the light directly emerges from the light emergent surface. Additionally, a surface light source device having the light emitting module is also provided.

Light emitting module and surface light source device

A side-emitting light-emitting element and a packaging lens thereof, wherein the packaging lens comprises an incident surface, a reflective surface, a first refractive surface, and a second refractive surface. The first refractive surface has zigzag surfaces. After a light from a light source enters into the packaging lens through the incident surface, a portion of the light is reflected by the reflective surface to the first refractive surface via total internal reflection to vertically penetrate the first refractive surface and then proceeds along a first optical path. The other portion of the light is refracted by the second refractive surface to penetrate the second refractive surface and then proceeds along a second optical path, which is parallel to the first optical path. A zigzag surface of the first refractive surface avoids from undesired lights reflected by the first refractive surface.

Side-emitting light-emitting element and packaging lens thereof

A lens of a side emitting LED includes a bottom surface, an incident surface, a reflective surface, a first refractive surface, a second refractive surface and a third refractive surface. An light emitted by a LED enters the lens through the incident surface. A portion of the light is reflected by the reflective surface in an internal total reflection manner to the second refractive surface and emits out of the lens along a first optical path. The other portion of light directly emits out of the lens through the first refractive surface and the third refractive surface. A transitive surface is located between the first refractive surface and the reflective surface. Such a design allows the light entered the lens through the incident surface not cross with the transitive surface. Hence an improper reflection or refraction can be prevented.

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Hsinchu, Taiwan

Wen-Bin Chou