Patent
Light panel with improved diffraction
Leo Hatjasalo,Rinko Kari +1 more
Reads0
Chats0
TLDR
In this paper, a light panel that includes a light source and a panel element operatively connected to the light source is considered, and a diffractive outcoupling system is arranged on the panel element over a light surface of the panel elements and is operative to outcouple the light beams from inside the panel.Abstract:
A light panel that includes a light source and a panel element operatively connected to the light source. The panel element includes a substantially transparent light transmitting material and is operative as a waveguide panel inside which light beams received from the light source propagate with total reflection. A diffractive outcoupling system is arranged on the panel element over a light surface of the panel element and is operative to outcouple the light beams from inside the panel element. The diffractive outcoupling system includes a plurality of local grating elements. The local grating elements have a plurality configurations and are optimized such that a diffraction efficiency is a function of location.read more
Citations
More filters
Patent
Method and device for manipulating color in a display
TL;DR: In this article, the spectral profile and color gamut of light produced by an interferometric display are controlled by means of a display comprising separate sections that output different predetermined colors of light.
Patent
Method and device for modulating light
TL;DR: In this paper, an array of modulation elements is modulated using a control circuitry connected to the array for controlling each of the modulation elements independently, each modulation element having a surface which is caused to exhibit a predetermined impedance characteristic to particular frequencies of light.
Patent
Distributed illumination system
TL;DR: In this article, a new class of lightweight tile-based illumination systems for uses wherein thin directionally-illuminating light distributing engines are embedded into the body of otherwise standard building materials like conventional ceiling tiles along with associated means of electrical control and electrical power interconnection.
Patent
Thin illumination system
TL;DR: In this paper, the authors introduced a new class of thin doubly collimating light distributing engines for use in a variety of general lighting applications, including a light distributing element that maintains input collimation while collimating output light in the un-collimated orthogonal meridian.
Patent
Dual film light guide for illuminating displays
TL;DR: In this article, a front light guide panel including a plurality of embedded surface features is provided, which is configured to deliver uniform illumination from an artificial light source disposed at one side of the font light panel to an array of display elements located behind the light guide.
References
More filters
Patent
Light expanding system for producing a linear or planar light beam from a point-like light source
Ping-Kaung Tai,Han Zou +1 more
TL;DR: A light expanding system for converting a light beam generated from a point-like light source into a collimated linear or planar light beam is described in this article, which is suitable for use in devices utilizing a linear light beam, such as a scanner.
Patent
Plane-shaped lighting device and a display using such a device
Terukazu Ohtsuki,Masahiko Kimoto,Hiroshi Minematsu,Nobuyuki Tominaga,Takahiro Funakoshi,Yasuhiro Wada,Hitoshi Azuma +6 more
TL;DR: In this article, a plane-shaped lighting device has a light-directing plate and a light source that is placed in contact with or in the proximity of the light-incident surface of the plate, and the light source is constituted of a plurality of LED lamps each of which has an LED chip for emitting light and a semispherical lens for directing the light from the LED chip into the plate.
Patent
Light pipe, plate light source unit and reflection type liquid-crystal display device
TL;DR: In this paper, a light pipe includes a plate-like member having light output means formed in its upper surface, an adhesive layer having a refractive index lower than that of the platelike member, and an anti-reflection layer made of a circularly polarizer and bonded to a lower surface of the plasterer.
Patent
Lighting apparatus, with high light directivity, liquid crystal display system using the same and electronic equipment using the same
TL;DR: In this paper, a reflection layer is provided on a surface of a light guiding body on which projections are formed with intervals, except the side surfaces of the projections, where the reflection layer can reflect the light with a small loss.
Patent
Light guide plates and light guide plate assembly utilizing diffraction grating
TL;DR: In this paper, a light guide plate is provided which utilizes the phenomenon of diffraction based on wave optics of light, which can provide much higher and more uniform brightness over an entire illuminated surface than the brightness level achievable by the prior art and can assure longer battery life through reduced power consumption for a light source.