摘要:
An optical device is provided including an active layer having two outer barriers and a coupled quantum well between the two outer barriers. The coupled quantum well includes a first quantum well layer, a second quantum well layer, a third quantum well layer, a first coupling barrier between the first quantum well layer and the second quantum well layer, and a second coupling barrier between the second quantum well layer and the third quantum well layer. A thickness of the first quantum well layer and a thickness of the third quantum well layer are each different from a thickness of the second quantum well layer. Also, an energy level of the first quantum well layer and an energy level of the third quantum well layer are each different from an energy level of the second quantum well layer.
摘要:
Disclosed herein are various embodiments related to luminescence-based reflective display pixels. In one embodiment, among others, a luminescent-based pixel includes a luminescent layer including luminophores distributed in a matrix. The luminescent layer is configured to receive light from an ambient environment through a first side of the luminescent layer and has an index of refraction that is higher than an index of refraction of the ambient environment. The luminescent- based pixel includes a mirror disposed on a second side of the luminescent layer that is opposite the first side of the luminescent layer. The luminescent-based pixel also includes a diffusive surface to randomize the direction of incident light.
摘要:
Disclosed herein are a backlight unit and a lighting system including the same. The backlight unit includes a first reflector and a bottom cover, a plurality of reflector support parts disposed on the bottom cover, each of the reflector support parts including at least two first and second slanted surfaces adjacent to each other about at least one inflection point, a second reflector disposed on the plural reflector support parts, and a light source module disposed between the first reflector and each of the second reflector.
摘要:
A transflective-type and a reflection-type liquid crystal display device having a high reflection efficiency and a high image quality are provided. A liquid crystal display device of the present invention is a liquid crystal display device including a reflection region, wherein the reflection region includes an insulating layer, a semiconductor layer and a reflective layer formed on a metal layer having a plurality of recesses therein; a plurality of protrusions of the metal layer, each having a bottom surface, an upper surface and a slope, are formed between the plurality of recesses of the metal layer; and a width a of a bottom surface of at least one of the plurality of protrusions in the metal layer satisfies a≤2(x+y)/tanθ, where a denotes the width of the bottom surface of each of the plurality of protrusions, x a thickness between the bottom surface and the upper surface, θ a tilt angle of the slope with respect to the bottom surface, and y a total thickness of the insulating layer, the semiconductor layer and the reflective layer.
摘要:
A light reflector of which the bidirectional reflectance R1 is from 90 to 120% when the light entrance angle is 15° and the light acceptance angle is 0°, and the bidirectional reflectance R2 is from 85 to 110% when the light entrance angle is 75° and the light acceptance angle is 0°. The light reflector has high reflectivity, and attains brightness improvement even in underlight-type backlights.
摘要:
An illumination system (31) suitable for a liquid crystal display consisting of an edge-mounted light source (35) arranged at a corner or at one of the edges of a planar light guide (34). The design of the light guide allows the suppression of an undesirable ''bright line'' optical effect (19) visible at oblique angles to the light guide. Optical structures (37,38), which do not protrude from the light guide are provided on the first main surface of the light guide. This first main surface is arranged opposite to the second main surface (39) through which the light from the source is transmitted. The recessed design of the structures also avoids their deformation even when pressure is applied. The optical structures include a distribution of deflecting elements (37) consisting of recessed facets (40,41) of triangular cross section (fig 8) and a distribution of diffusing elements (38). Each of the diffusing elements is arranged in front of one of the deflecting elements as seen from the direction of the incident light (fig 6), and partially covers the corresponding deflecting element. The diffusing elements are also provided by recesses in the first main surface of the light guide (34). Each of the diffusing elements consists of a recess having an undulating ribbed surface (fig 7), such that the profile of the recess perpendicular to the direction of incident light (43) exhibits a wave-like form in the recess depth. The ribs run substantially parallel to the direction of incident light exhibiting a substantially uniform rectangular profile in that direction.
摘要:
An electrochromic mirror is disclosed for use in a vehicle rearview mirror assembly (110) having an electronic device (160, 170, 220, 725) positioned behind the electrochromic mirror for selectively projecting and/or receiving light through the mirror. The electrochromic mirror includes an electrode (120) that includes a layer of reflective material (121) and a coating of electrically conductive material (172) that is at least partially transmissive. The second electrode further includes a region (146) in front of the electronic device that is lest partially transmissive. The electrically conductive coating may include a single transparent layer or a plurality of partially reflective and transmissive layers, or an electrically conductive dichroic coating. The electronic device may be a light sensor (160) or a light source such as an information display (170) or a signal light (220).