Abstract:
A vehicle lighting device including a light source module, a light valve, a sensing unit, a projection lens set and a control unit. The light source module provides an illumination beam. The light valve is located on a transmission path of the illumination beam, and is capable of being switched to different states for adjusting the illumination beam. The sensing unit senses the front of the vehicle lighting device and generates a signal. The projection lens set is disposed on an optical path of the illumination beam for projecting at least a portion of the illumination beam. The control unit is electrically connected to the light valve and the sensing unit for receiving the signal. The control unit controls the light valve to adjust a light distribution pattern of the illumination beam according to the signal, and project the illumination beam to the front through the projection lens set.
Abstract:
An illumination apparatus including an exciting light source, a reflective switching element, a first wavelength conversion element, and a second wavelength conversion element is provided. The exciting light source emits an exciting beam, and the reflective switching element is disposed on a transmission path of the exciting beam. When the reflective switching element is switched to a first state, the reflective switching element reflects the exciting beam to the first wavelength conversion element so as to excite the first wavelength conversion element to emit a first conversion beam. When the reflective switching element is switched to a second state, the reflective switching element reflects the exciting beam to the second wavelength conversion element so as to excite the second wavelength conversion element to emit a second conversion beam.
Abstract:
A display apparatus including a display unit, a first reflector, a second reflector, a third reflector and a lens unit is provided. The display unit emits an image beam. The first reflector is disposed on a transmission path of the image beam. The second reflector is disposed on the transmission path of the image beam from the first reflector. The third reflector is disposed on the transmission path of the image beam from the second reflector. The lens unit is disposed on the transmission path of the image beam from the third reflector. The image beam emitted from the display unit passes through a space defined between the second reflector and the third reflector and is transmitted to the first reflector. Afterward, the image beam is sequentially reflected by the first reflector, the second reflector and the third reflector, and then passes through the lens unit.
Abstract:
A touch display apparatus including a light guide plate, a light emitting module, a display panel, a plurality of prism structures, an image transmission unit, and an image detector is provided. The light guide plate has a first surface, a second surface opposite to the first surface, and a light incident surface connecting the first surface and the second surface. The light emitting module includes at least one visible light source and at least one invisible light source. The prism structures are disposed between the first surface and the display panel. The image transmission unit includes a wedge portion and a light guide portion. The wedge portion is disposed between the prism structures and the display panel. The image detector is disposed beside the light guide portion for receiving the invisible light beam from the light guide portion. A backlight module is also provided.
Abstract:
A brightness enhancement film (BEF) includes a light transmissive substrate having a first surface and a second surface, a plurality of lenses disposed on the first surface, and a reflective layer. Each of the lenses has a curved protruding surface facing away from the light transmissive substrate. The radius of curvature of the curved protruding surface in a first direction parallel to the first surface is R1, the radius in a second direction is R2, and R1≠R2. The reflective layer is disposed on the second surface and has a plurality of light pass openings respectively located on the optical axes of the lenses. The distance between the apex of the curved protruding surface and the corresponding light pass opening is L, the refractive index of the lenses is n, and the BEF satisfies L
Abstract:
A light condensing film includes a reflective unit, a light-transmissive substrate, a plurality of lenses, and a plurality of refractive units. The reflective unit has a plurality of holes passing through the reflective unit, wherein the holes are distributed at the reflective unit. The light-transmissive substrate is disposed on the reflective unit. The lenses are disposed on the light-transmissive substrate. Moreover, the lenses respectively cover the holes of the reflective unit, and the light-transmissive substrate is disposed between the reflective unit and each of the lenses. The refractive units are disposed on the light-transmissive substrate and distributed among the lenses. The light-transmissive substrate is disposed between the reflective unit and each of the refractive units. Each of the refractive units has a light refraction plane surface. A backlight module and a liquid crystal display are also provided.
Abstract:
A brightness enhancement film (BEF) includes a light transmissive substrate having a first surface and a second surface, a plurality of lenses disposed on the first surface, and a reflective layer. Each of the lenses has a curved protruding surface facing away from the light transmissive substrate. The radius of curvature of the curved protruding surface in a first direction parallel to the first surface is R1, the radius in a second direction is R2, and R1≠R2. The reflective layer is disposed on the second surface and has a plurality of light pass openings respectively located on the optical axes of the lenses. The distance between the apex of the curved protruding surface and the corresponding light pass opening is L, the refractive index of the lenses is n, and the BEF satisfies L
Abstract:
An optical film has a light incident side and a light emitting side above the light incident side. V shape protrusions disposed side by side are disposed at the light incident side. Collimating units disposed side by side are disposed at the light emitting side. Each of the V shape protrusions and each of the collimating units extend along a predetermined direction. The collimating units are respectively corresponded to the V shape protrusions. Two inclined surfaces of each of the V shape protrusions are respectively a light incident surface and a reflection surface. In each corresponding pair of the V shape protrusion and the collimating unit, a central axis of the collimating unit parallel to the predetermined direction is right above the reflection surface of the V shape protrusion. A backlight module using the optical film is provided to provide a plane light source having high luminance.
Abstract:
A zoom lens suitable for imaging an object on a photosensitive device is provided. The zoom lens includes a first lens group, a second lens group, a third lens group and a fourth lens group, which are arranged in series. The fourth lens group is disposed near the photosensitive device. The second lens group and the third lens group are suitable for moving between the first lens group and the fourth lens group. The first lens group, the second lens group, the third lens group and the fourth lens group include at least a glass lens and a plurality of plastic lenses. The number of the plastic lenses is more than the number of glass lenses. Thus, overall cost of producing the zoom lens is lower.
Abstract:
A zoom lens having a high zoom ratio and also a small size is proposed. The zoom lens has a front group of lenses and a rear group of lenses. The front group of lenses has a first lens, a second lens, and a third lens. The first lens is a meniscus negative lens. The second lens is a biconcave lens negative lens. The third lens is a positive lens. The rear group of lenses has a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The fourth lens is a positive lens. The fifth lens is a biconvex lens. The sixth lens is a meniscus negative lens. The seventh lens is a meniscus negative lens. The fourth and seventh lenses are aspheric lenses made of plastic material. The proposed zoom lens can meet the requirement of miniaturized size and also maintain the image quality.