Radiant Opto-electronics Corporation

Radiant Opto-electronics (suzhou) Co., Ltd.

Radiant(guangzhou) Opto-electronics Co, Ltd

Yung-Hui Tai

Wei-Hsuan Chen

Chun-Yi Wu

Chun-Hau Lai

Yuan-Chen Chung

An optical film includes a substrate layer and a plurality of optical layers stacked on the substrate layer. The at least two optical layers have microstructures that complement to each other. The optical layer close to the substrate layer is the first optical layer, and the optical far from the substrate layer is the second optical layer. The refractive index of the first optical layer is smaller than the second optical layer, and the microstructure of the second optical layer has an acute angle. Because of the arrangement of the optical layers, the contrast of light intensity can be reduced, and the uniformity can be improved. The invention also provides a backlight module and a display device including the optical film.

Optical film, backlight module, and display device

A light directing sheet includes a light-incident side and a light-exit side opposite to the light-incident side. The light-exit side can be divided into a middle area and two side areas along an X-axis direction. The side areas are located on both sides of the middle area. A plurality of strip structures are protruded and arranged on each of the side areas, and the strip structures are arranged along the direction of the X axis and elongated along the direction of a Y axis perpendicular to the X axis. The strip structures are in a staggered arrangement of high microstructures and low microstructures with a height lower than the high microstructures. Through the type and arrangement of the strip structures on the light directing sheet, the light with an excessively large angle can be refracted again. A backlight module and a display device include the light directing sheet.

Light directing sheet, backlight module, and display device

A light guide composition includes a substrate and a first microstructure layer. The substrate has a first main surface. The first microstructure layer is disposed on the first main surface. A refractive index of the substrate with respect to a first light wavelength is greater than a refractive index of the first microstructure layer with respect to the first light wavelength, a refractive index of the substrate with respect to a second light wavelength is smaller than a refractive index of the first microstructure layer with respect to the second light wavelength, and the first light wavelength is smaller than the second light wavelength.

Light guide composition, backlight module having light guide composition and display device having backlight module

A light guide includes a light input surface which has two first edges, an output surface parallel to and larger than the input surface, and two connecting surfaces, each of which interconnects the light input surface and said light input surface and has an inclined segment. Relationships of &#x3b8;&#x3c;&#x3b8;and L&#x3e;(AD)/(tan &#x3b8;) are satisfied, where &#x3b8; is an included angle defined between extensions of the inclined segments of the connecting surfaces, &#x3b8;is a critical angle for total internal reflection associated with the light guide, (L) is a distance between the light input and output surfaces, and (AD) is a distance between a location of incidence of a light beam on the light input surface and one of the first edges.

Light guide and a light device incorporating the same

A light guide element and a lamp are described. The light guide element has a length and an angle of total reflection. The light guide element includes a light-incident surface, a light-emitting surface, a first reflecting surface, and a second reflecting surface. The light-incident surface includes a first outer peripheral edge and a first inner peripheral edge. The light-emitting surface includes a second outer peripheral edge and a second inner peripheral edge. The first reflecting surface connects the first outer peripheral edge and the second outer peripheral edge. The second reflecting surface connects the first inner peripheral edge and the second inner peripheral edge. An angle is formed between the first reflecting surface and the second reflecting surface. The angle is smaller than the angle of total reflection, and the length is greater than a predetermined distance divided by tan the angle of total reflection).

Light guide element and lamp for controlling light beam angle

A light guiding device includes a light input surface, a light output surface extending from a first edge of the light input surface, a connecting surface extending from a second edge of the light input surface, and a reflecting surface interconnecting the output surface and the connecting surface. Relationships of &#x3b8;&#x3c;&#x3c6;, &#x3b8;&#x3c;&#x3b8;and L&#x2267;(AD)/tan &#x3b8; are satisfied, where &#x3b8;is a critical angle for total internal reflection, &#x3b8; is an angle between extensions of the connecting surface and the light output surface, &#x3c6; is an angle between the reflecting and light output surfaces, (L) is a distance between the second edge and the end edge, and (AD) is a distance between a location of incidence of a light beam on the light input surface and one of the first or second edge.

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Kaohsiung, Taiwan

Yung-Hui Tai