1301results about How to "Improve light utilization" patented technology

A heat dissipating apparatus for lighting utility includes a casing, a light-focusing unit, a light-reflecting unit, a heat-dissipating unit, a light generator, a wind generator, a cover and a circuit board. The heat-dissipating unit absorbs a heat generated from the light generator, the wind generator circulates air outside the casing and inside the casing, whereby the heat absorbed by the heat-dissipating unit is dissipated outside the casing.

Disclosed is an imaging directional backlight polarization recovery apparatus including an imaging directional backlight with at least a polarization sensitive reflection component with optional polarization transformation and redirection elements. Viewing windows may be formed through imaging individual light sources and hence defines the relative positions of system elements and ray paths. The base imaging directional backlight systems provide substantially unpolarized light primarily for the illumination of liquid crystal displays (LCDs) resulting in at least 50% loss in light output when using a conventional sheet polarizer as input to the display. The invention herein introduces a polarization sensitive reflecting element to separate desired and undesired polarization states for the purposes of transformation and redirection of the reflected light for usable illumination. Polarization transformation and redirection can be provided by additional components such as retarder films and specular mirror surfaces.

A planar light source system having an LED (1) serving as a primary light source of substantially point-shaped light source, a light guide (2) having a light incident face on which light emitted from the LED (1) is incident and a light emission face (4) from which light guided through the light guide (2) is emitted, a light deflecting device (3) for controlling the direction of the emission light from the light guide (2), and a reflection sheet (6). LED (1) is disposed at a corner portion of the light guide (2), and many elongated prisms (5) are arranged substantially arcuately in parallel to each other on the light incident surface (14) of the light deflecting device (3) so as to surround LED (1).

An optical lens includes a incident curved surface, a cone-shaped body, and a emitting curved surface. Light emitted from a light emitting diode (LED) has a first refraction angle on a first plane and a second refraction angle on a second plane after passing through the incident curved surface, the cone-shaped body, and the emitting curved surface. The first refraction angle is between 105 degrees and 145 degrees, and the second refraction angle is between 38 degrees and 65 degrees. The light is asymmetrically distributed on the second plane. Therefore, when the optical lens is applied to a street lamp, the light utilization on a road side may be increased.

An illuminated sign, internally illuminated by a source such as one or more LED'S generally located at one end, and having a character panel with at least partially transmissive portions to define the characters of the sign. The character panel is curved so as to face the source more squarely at distances further from the source. By this arrangement, the geometric fall-off of illumination with increasing distance from the source is compensated for by the curvature of the character panel, such that more uniform illumination is provided than with prior art flat panels. Power management systems for solar charged illuminated signs are also described, in which the illumination level of the sign is adjusted according to the ambient solar flux and according to the charge-holding capacity of the battery. The system also warns of the impending end of battery life without interrupting the sign functionality.

A backlight device, which uses solid-state light emitting elements capable of emitting lights of three colors, consisting of red, green and blue, can exhibit an enhanced light utilizing efficiency, and can generate light of high uniformity in brightness and chromaticity in a display device which can obtain a display image of high brightness with a rapid response speed. The backlight device includes a reflector which has a light reflection surface, a plurality of light transmitting cylindrical light guide bodies which are mounted on the light reflection surface of the reflector in a uniformly distributed manner, and light emitting diodes capable of emitting lights of at least three colors which are mounted inside each light guide body. By performing color mixing every light guide block, it is possible to obtain a white light of high chromaticity which has a high luminous flux distribution.

A solar module is disclosed, which includes a back plate, a reflecting structure, one or more solar cell units, a bottom sealant, a top sealant, and a transparent plate. The reflecting structure is disposed on the back plate. The reflecting structure has inclines and a reflector layer. The solar cell units are disposed on the back plate. The solar cell units are spatially separated from and adjacent to the reflecting structure. The inclines are tilted towards nearby solar cell units. The reflector layer is disposed on the incline for directing the light toward the solar cell unit through total internal reflection. The bottom sealant is disposed between the back plate and the solar cell units. The top sealant is disposed on the solar cell units, and the transparent plate is disposed on the top sealant. A method for fabricating the solar module is also disclosed.

The liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer interposed between the first and second substrates, and a plurality of picture-element regions for providing display. Each of the plurality of picture-element regions has a transmission region for providing display in a transmission mode by using light incident through the first substrate, and a reflection region for providing display in a reflection mode by using light incident through the second substrate. The second substrate has a color filter layer provided in the transmission region and the reflection region. The thickness of the color filter layer in at least a part of the reflection region is smaller than the thickness of the color filter layer in the transmission region.

The invention provides a secondary reflection light gathering and heat collecting device with a compound curved surface, which relates to a solar slot type light gathering and heat collecting device and comprises a heat collecting tube (1), a plane primary reflector (2), a refracting plane secondary reflector (3), a compound circular arc primary reflector (4), a compound paraboloid secondary reflector (5) and a supporting frame (6), wherein the heat collecting tube (1) comprises two parallel heat collecting tubes and is positioned in the compound paraboloid secondary reflector (5), and the supporting frame (6) is positioned below the compound circular arc primary reflector (4) and used for fixing the compound circular arc primary reflector (4). By adopting the design of combination of onesupporting frame and two heat collecting tubes, the cost and the height of the heat collecting device can be remarkably reduced; by adopting the compound paraboloid secondary reflector, the requirement on the tracking accuracy is reduced; by adopting the compound circular arc primary reflector, the degree of freedom of the design is increased; and by adopting the design of combination of the planereflector and the refracting plane, the utilization ratio of the light energy is improved.

The invention provides a light source system and a piece of projection equipment. The light source system comprises at least two light sources, a wavelength conversion device, a first light guide component, and a second light guide component. The at least two light sources include an exciting light source and a first complementary light source, and the exciting light source is used for emitting exciting light. The first light guide component is used for guiding the exciting light to the wavelength conversion device and guiding excited light emitted by the wavelength conversion device to a light homogenizing device. The wavelength conversion device is used for converting the exciting light into excited light and emitting the excited light to the first light guide component. The additional light source emits first complementary light of which the optical extend is smaller than that of the excited light. The second light guide component is used for guiding the first complementary light to the light homogenizing device. The size of the second light guide component is smaller than the size of the first light guide component. According to the invention, the utilization rate of the first complementary light can be greatly improved.

An illumination apparatus is provided, the illumination apparatus including at least two light-emitting diodes (LEDs) capable of being driven in a flashing manner to output illumination light beams; a polarization converter unit configured to match the polarization directions of the illumination light beams emitted from the at least two light source units; a liquid crystal cell configured to receive the illumination light beams outputted from the polarization converter unit; and a control unit configured to control, in synchronization, the liquid crystal cell and the light source units so as to intermittently drive the light source units and substantially continuously output illumination light beams from the liquid crystal cell.

The embodiment of the invention provides a liquid crystal display device, which relates to the technical field of liquid crystal display and can be used for increasing the light transmission rate of the liquid crystal display device, so as to increase the light utilization ratio of a backlight source, lower the power consumption of an LED (Light-Emitting Diode) and prolong the service life of the LED. The liquid crystal display device comprises an array substrate, a color film substrate, a liquid crystal layer and a light enhancing film, wherein the color film substrate is arranged opposite to the array substrate, and is provided with a black matrix and a color filter layer; the liquid crystal layer is arranged between the color film substrate and the array substrate; and the light enhancing film is arranged below the array substrate, and comprises a reflecting part which is arranged corresponding to the black matrix.

The embodiment of the invention provides a system for detecting sub-optical fibers, comprising a main optical fiber, a light splitting module and multiple sub-optical fibers, wherein the light splitting module comprises at least one light splitter; each port of the light splitting module is provided with an optical film which is used for carrying out bandpass filtering on optical signals sent to the ports of the light splitter in accordance with a preset rule, and the optical films can cause pass bands of test links corresponding to sub-optical signals to be different; test equipment is used for selecting test wavelength sub-bands which are matched with the optical films of the ports of the light splitter in testing light spectrums in accordance with ports of the light splitter corresponding to to-be-tested sub-optical fibers, sending test signals corresponding to the selected test wavelength sub-bands to the ODN, receiving reflected signals which are formed by reflecting the test signals on the corresponding sub-optical fibers and acquiring the channel characteristics of the to-be-tested sub-optical fibers in accordance with the reflected signals. The embodiment of the invention also provides a method for detecting the sub-optical fibers, an ODN (optical distribution network) and an optical splitter.

The invention discloses a light guide plate with a concave microstructure and a manufacturing method thereof. The light guide plate comprises a substrate and a structure layer; and the structure layer comprises the concave microstructure with a distance between a surface and a surface of a substrate being less than the thickness of the structure layer. In at least one area in the structure layer of the light guide plate, the positions of the concave microstructure are distributed randomly or according to a set rule, and a density of the concave microstructure is gradually varied along at least one direction. The manufacturing method of the light guide plate disclosed by the invention comprises the steps of: designing a light stopping pattern and distribution thereof; providing a material mixture coating capable of being photopolymerisable on the light guide plate; and using energy radiation to selectively polymerize the material mixture on the coating and remove the non-polymerized material mixture on the coating through a mask board, so that the concave microstructure corresponding to the light stopping pattern and the distribution thereof and the used material mixture is formed by a reserved space of the removed material mixture in the coating. The application range of the light guide plate provided by the invention comprises a backlight source of a liquid crystal display and an LED (Light-Emitting Diode) illumination assembly, so that the light use ratio can be more effectively improved.

The invention discloses a backlight module group and a liquid crystal display. The backlight module group comprises a light guide plate and a light source, wherein the light guide plate comprises a light incidence surface, the light source comprises a light emitting surface, the backlight module group also comprises a first back plate and a second back plate, the first back plate comprises a first back plate body and a first bending part, the second back plate comprises a second back plate body and a second bending part, the first back plate body and the second back plate body are glidingly connected, the light guide plate is fixedly connected onto the first back plate body, the light emitting surface of the light source is pasted on the light incidence surface of the light guide plate, the other side of the light guide plate is near the inner side connected with the second bending part, and when the light guide plate expands through being heated, the expanded light guide plate and the second bending part are in contact to generate the thrust, so the second back plate slides relative to the first back plate.

The invention relates to a high-collimation face type light source module and a light output method thereof. The high-collimation face type light source module comprises at least one light source, a light guide plate, a light ray divergence angle convergence diaphragm and a light ray turning collimation diaphragm, wherein the bottom surface or the top surface of the light guide plate, the light output face of the convergence diaphragm and the light input face of the collimation diaphragm are all provided with micro-structures; after the light rays of the light source are emitted into the lightguide plate by the side face of the light guide plate, the light rays are reflected or refracted by the micro-structure of the light guide plate, are guided out of the light guide plate and enter theconvergence diaphragm; the light rays are refracted out of the convergence diaphragm by the micro-structure of the light output face of the convergence diaphragm and enter the collimation diaphragm;after the light rays are refracted by the micro-structure of the light input face of the collimation diaphragm, the light rays are emitted out of the collimation diaphragm by the light output face ofthe collimation diaphragm; therefore, the half-peak full-width number of a light field of the output light can be greatly reduced; and except for high-collimation light output properties, the invention can also be suitable for production and manufacture in the prior back light module technological technology.

A light guide plate (20) includes a main body, a light incident surface (201), a light emitting surface (202), and a plurality of light diffusing structures (204), arranged within the main body according to a predetermined pattern. The light diffusing structures are formed using an engraving method. The light diffusing structures are formed within the light guide plate, which protects the light diffusing structures from being damaged. In addition, the laser engraving method and the ultrasonic engraving method can be conveniently controlled, so that the arrangement and distribution of the light diffusing structures can be easily controlled. This enables the light guide plate to be configured with optimal optical characteristics, thereby yielding an improved light utilization ratio.