32results about How to "Reduce the number of light sources" patented technology

Provided is a liquid crystal display device (1), including: a liquid crystal panel (2); and a backlight unit (4), which is disposed on a rear surface of the liquid crystal panel (2) and includes a light source substrate (42) onto which a plurality of light sources are mounted and a casing (49), in which: the plurality of light sources are arranged along one direction, and at least one of the plurality of light sources is disposed so as to be offset in a direction orthogonal to the one direction with respect to at least another one of the plurality of light sources; and the backlight unit further includes a fixture (50) for fixing the light source substrate (42) onto the casing (49), the fixture being disposed on a side of the offset light source in an opposite direction to an offset direction.

The invention relates to a display apparatus and a light guide plate. The display apparatus is characterized by comprising a light source and a light guide plate. The light guide plate includes: a light guiding part which guides light incident on a side thereof from the light source by total internal reflection; a fine pattern portion which emits the guided light only to an upper portion of the light guiding part; a guard ring portion which protects the fine pattern portion from the intrusion of impurities; and a light emitting member which is disposed on a top surface of the fine pattern portion and a top surface of the guard ring portion. The light guide plate is formed of a transparent material.

The invention discloses a decorative wallboard and a decorative wall, which include a light source device and a wallboard body. There are three light-through holes, and a light-transmitting sheet and an adjustable light-shielding sheet are respectively arranged in the three light-through holes. The colors of the three light-transmitting sheets in each optical fiber interface are red, green, and blue. The main body includes the upper layer of the wallboard and the lower layer of the wallboard. Several fiber bundles are arranged between the upper layer of the wallboard and the lower layer of the wallboard. There are three optical fibers in each fiber bundle. The light outlet of the fiber bundle faces the upper layer of the wallboard. There is a transparent protective layer, and the light entrance of the fiber bundle is connected with the fiber interface. The present invention realizes the flexible change of light color and brightness through the perfect combination of the light source device and the wallboard body, and by arranging light-transmitting sheets and light-shielding sheets in the light source device, so that different patterns can be displayed on the wall.

The invention discloses a coherent passive optical network system and signal transmitting and receiving method, and relates to an optical access network. The method includes the following steps that in the downlink direction, k multi-carrier signal transmitting-receiving devices in an OLT have high-speed DACs, each multi-carrier signal transmitting-receiving device generates N downlink digital signals in a digital method, the k multi-carrier signal transmitting-receiving devices and a wavelength division multiplexing and demultiplexer of one k path are combined to generate dense or super-dense wavelength division multiplexing signals, the dense or super-dense wavelength division multiplexing signals are selective received by a coherent ONU after passing a power distributor, and the coherent ONU achieves selection of channels by adjusting LO wavelength in coherent detection. The coherent passive optical network system is low in cost, simple in structure, high in sensitivity and suitable for a super-dense wavelength division multiplexing network.

The invention belongs to the technical field of automatic defect detection of panels, and discloses a surface damage defect detection device and method based on shooting by a side-view camera, comprising a camera, a bar light source, a position adjustment mechanism and a central controller; the camera and the position adjustment The mechanism is connected with the central controller through a control cable; the strip light source and the camera are arranged on a position adjustment mechanism located on one side of the display screen to be tested; the camera and the strip light source are located on the same side of the display screen, and the camera and the display There is a set shooting angle between the screens; the invention adopts a strip light source as the lighting light source, and sets the shooting camera and the strip light source on the same side of the display screen, so as to avoid the uneven shooting picture of the camera caused by multiple light sources If the defect is imaged on the shooting screen of the camera with a higher contrast, the accuracy of defect detection can be improved.

The invention discloses a method and a device for producing a dark spot on the basis of a transparent medium small ball. The method comprises the following step that: a tangent polarization light beam is incident to the microndimension transparent medium small ball, so that the dark spot is obtained at the emergent end of the microndimension transparent medium small ball. The device comprises a device for producing the tangent polarization light beam, a microscopic objective lens, the microndimension transparent medium small ball and cover glass for fixing the microndimension transparent medium small ball sequentially; and the tangent polarization light beam is initially focused by the microscopic objective lens and further focused by the microndimension transparent medium small ball so as to obtain the dark spot. In the invention, a single light beam serves as a working light beam of the system, so the system cost is saved and the practicability is enhanced; meanwhile, the size of the focused dark spot is up to 0.414 lambdas and much smaller than that of the dark spot focused by a common tangent polarization light beam. Furthermore, the quality of the light beam is improved, so actual application is facilitated.

The invention provides a modularized microstructure light guiding device which is composed of at least one microstructure light guiding unit. Each microstructure light guiding unit comprises a light source, an optical coupling element enabling the light source to emit light in parallel, and a light guiding body comprising at least two incident surfaces, a microstructure light uniformizing area, a total reflection area and an emitting surface, wherein the two incident surfaces guide light rays to the microstructure light uniformizing area and the total reflection area, and then the light rays are reflected and emitted from the emitting surface.

The invention discloses a focal-depth expanding method comprising the following steps of: converting work beam polarization into cylindrical polarized light and splitting the cylindrical polarized light into two beams, wherein after being coded by 0-Pi phases, one beam and the other beam which is optically replicated irradiate the same optical beam combiner inwards to form a combined coaxial beam, and after the combined coaxial beam is focused by a lens, an expanded focal-depth spot is obtained. The invention also discloses a focal-depth expanding device comprising a light source, a polarizedlight converter, an optical splitter, a 0 / Pi phase plate, an optical replicating device, an optical beam combiner and an apochromat focusing lens. For the focal depths of specific types of focusing spots, the method and the device use coherent light as work beams, save system cost and increase practicability, meanwhile, the focal depths of the expanded focusing spots are increased by above two times, the beam quality is increased, the focusing spots can reach below the self diffraction limitation of a system, and the expanded light intensity has more even distribution and is more beneficial for practical application.

The invention discloses a three-dimensional super-resolution focusing method and device based on transparent medium pellet. The method comprises the steps of: emitting a radial polarized light beam to a micron-grade transparent medium pellet to focus to obtain a focused light spot at the exit end of the transparent medium pellet. The device orderly comprises a device for generating the radial polarized light beam, a micro-objective, the micron-grade transparent medium pellet and a cover glass for fixing the micron-grade transparent medium pellet, wherein the radial polarized light beam is primarily focused by the micro-objective and then further focused by the micron-grade transparent medium pellet to obtain the focused light spot. In the invention, a single light beam is used as a systemworking light beam, which saves system cost and increases practical applicability; simultaneously, the longitudinal axis length of the focused light spot is reduced to be less than 0.17 lambda, the quality of the light beam is increased, and the transversal size of the focused light spot can be lower than the diffraction limit of the system; in particular, the volume of the focused light spot is small, which is favorable for actual application.

The invention relates to a side-entry quantum dot backlight module structure, which includes two excitation light sources provided with reflectors, an optical path conversion device and a quantum dot light guide plate, and the excitation light sources are respectively located on the left and right sides of the optical path conversion device , the optical path conversion device is located on the side of the quantum dot light guide plate, and the light incident side of the quantum dot light guide plate has a quantum dot layer; a part of the light emitted by the excitation light source is incident on the quantum dot light guide plate after being reflected by the optical path conversion device , after the color conversion of the quantum dot layer and the modulation of the quantum dot light guide plate, the light is emitted, and the other part of the light that is directed to the reflector after passing through the optical path conversion device is incident on the quantum dot again after being reflected by the reflector and the action of the optical path conversion device. Reuse in the light guide plate. This structure can not only effectively reduce the influence of light radiation and light source heat on the quantum dots, improve the service life of the backlight module, but also greatly reduce the number of light sources used in the backlight module and reduce production line costs.

The invention discloses a method for extending focal depth, including that: Bessel-Gauss radial polarized light passes through an annular diaphragm, so as to modulate amplitude and split the light into two light beams; one light beam is subject to 0-Phi phase coding and then are incident into the same optical beam combining device with the other light beam after optical reflex, so as to form a combined coaxial light beam, and then lens focusing is carried out, thus obtaining the extended focal depth spot. The invention also discloses a device for extending focal depth, comprising a light source generating Bessel-Gauss radial polarized light, an annular diaphragm, a beam splitter, a 0 / Phi phase plate, an optical reflex device, an optical beam combining device and an apochromatism focusing lens. In the method and device, Bessel-Gauss laser is taken as a work light beam, the focal depth of extended focal spot is more than 8lambda, the focal spot can be less than diffraction limit of system, and light distribution after extending is more uniform, thus being more beneficial to practical application.