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

The invention belongs to the technical field of automatic defect detection of panels and discloses a side view camera shooting based surface damage defect detection device and method. The side view camera shooting based surface damage defect detection device comprises a camera, a strip source, a position regulation mechanism and a central controller, the camera and the position regulation mechanism are connected with the central controller through a control cable; the strip source and the camera are arranged on the position regulation mechanism on one side of a to-be-detected display screen; the camera and the strip source are located on the same side of the display screen, a set shooting angle is kept between the camera and the display screen; the strip source is used as a lighting lightsource, the shooting camera and the strip source are arranged on the same side of the display screen, the condition that multiple light sources cause uneven shooting picture of the camera is avoided,the defect is imaged on the picture shot by the camera at a relatively high contrast ratio, and the defect defection accuracy is improved.

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 provides a GPU (Graphics Processing Unit) dynamic frequency modulation method, device and system, which are used for solving the technical problem that in the prior art, a proper processor operation frequency cannot be found to reduce the power consumption of a processor. The method comprises the following steps: obtaining the graphic rendering amount of each frame of image in real time; performing classification processing on the graphic rendering amount to obtain a category corresponding to the graphic rendering amount; a sample database is called, the target frequency corresponding to the category is determined, and the sample database comprises the corresponding relation between multiple categories and frequency parameter sets; and adjusting the working frequency of an image processor GPU of the VR equipment to the target frequency.

The patent refers to the field of 'optical elements, systems, or apparatus'. 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 polarized light 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 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.

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 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 system working 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 discloses a passive optical network link monitoring system and method based on a tunable laser. The system comprises a monitoring server, a tunable laser, a three-port circulator, a wavelength division multiplexer, a fiber grating encoder, an optical receiver and a data acquisition card. The system scans coded wavelengths one by one by adopting the tunable laser at the transmitting end, receives reflected signals of the coded wavelengths in turn by using the single-channel optical receiver at the receiving end, and finally judges the link state of a passive optical network according to the reflected signals of all coded wavelengths, thereby overcoming the defects that the cost is high, it is not conducive to monitoring the capacity expansion of users and that the central wavelength of a fiber grating is affected by the temperature in the prior art.

The invention relates to the technical field of ultraviolet light application, in particular to an ultraviolet light source assembly, an ultraviolet optical system and an ultraviolet printing device. The ultraviolet light source assembly comprises a plurality of light sources for emitting ultraviolet light and further comprises a light collecting device. The light collecting device is matched with the light sources, so that all or part of the light emitted by the light sources enters the light collecting device, the light collecting device converges the light entering the light collecting device to a plane, and a continuous strip-shaped irradiation area is formed in the plane. The light collecting device is adopted for collecting and converging the light emitted by the light sources, and the continuous strip-shaped irradiation area is formed on the plane. Compared with a traditional ultraviolet light source assembly, identical irradiation intensity is achieved; and by means of the structure, the number of the needed light sources is far smaller than that of light sources needed by adopting a traditional structure, and therefore the structure of equipment is simplified, heat radiation difficulty is reduced, and then the reliability of the equipment is improved.

The invention relates to an LED light source and a preparation method thereof and a backlight module, and belongs to the technical field of display. The LED light source comprises a light source substrate, a green light chip, a blue light chip and packaging glue. The green light chip and the blue light chip are fixedly arranged at the upper end of the light source substrate, the green light chip and the blue light chip are both electrically connected with the light source substrate. The packaging glue is fixedly arranged at the upper end of the light source substrate, the green light chip and the blue light chip are packaged in the packaging glue, diffusion powder is mixed in the packaging glue, and the diffusion powder can perform primary scattering on light rays emitted by the green light chip and the blue light chip. Compared with the prior art, the light emitting angle of the LED light source can be increased, the cost is reduced, and the service life of the backlight module is prolonged.

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 decorative wall plate and a decorative wall. The decorative wall plate comprises a light source device and a wall plate body. The light source device comprises a shell and a light source arranged in the shell. The surface of the shell is provided with a plurality of optical fiber interfaces. Each optical fiber interface comprises three light-passing holes. A light transmitting sheet and an adjustable shading sheet are arranged in each light-passing hole. The colors of the three light transmitting sheets of each optical fiber interface are red, green and blue. A wall plate body comprises a wall plate upper layer and a wall plate lower layer; a plurality of optical fiber bundles are arranged between the wall plate upper layer and the wall plate lower layer; each optical fiber bundle comprises three optical fibers; light-emitting ports of the optical fiber bundles face the wall plate upper layer. The outer sides of the optical fiber bundles are packaged with transparent protecting layers. Light-coming ports of the optical fiber bundles are connected with the optical fiber interfaces. The light source device and the wall plate body are perfectly combined. Through the light transmitting sheets and the shading sheets, the color and the brightness of light can change flexibly and different patterns can be formed on the wall body.

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.

An optical plate comprises a transparent body which comprises a light extraction surface and a bottom surface opposite to the light extraction surface; wherein, a plurality of triangular pyramid shaped grooves and a plurality of rectangular pyramid shaped grooves are formed on the light extraction surface; each rectangular pyramid shaped groove is enclosed by four triangular pyramid shaped grooves. The invention also provides a backlight module adopting the optical plate. The backlight module has the advantages of improving efficient utilization ratio of light and enjoying uniformity of light emission.

The invention discloses a shooting method. The shooting method comprises the steps of processing a preview image to determine the number of light sources in the preview image; judging whether the number of the light sources is more than a predetermined number; sending a prompt of adjusting a view field when the number of the light sources is more than the predetermined number; and when the numberof the light sources is less than or equal to the predetermined number, detecting the color temperature of the light sources and performing white balance according to the color temperature of the light sources. The invention also discloses an imaging device, computer equipment and a computer readable storage medium. According to the shooting method, the imaging device, the computer readable storage medium and the computer equipment provided by the embodiment of the invention, the number of light sources of the preview image is detected, and the computer equipment is controlled to send out theprompt of adjusting the view field when there are multiple light sources, so as to assist the user to adjust the view field to reduce the number of the light sources in the preview image, and thus after being subjected to white balance, the image shows the relatively accurate color.

The invention provides a straight down type backlight source module. The straight down type backlight source module comprises light sources, a backboard, a reflection sheet and a diffusion board. The reflection sheet is located above the backboard, the diffusion board is located above the reflection sheet, the light sources are located between the backboard and the diffusion board, and a plurality of light diverging devices are arranged around the light sources and located between the backboard and the diffusion board. According to the straight down type backlight source module, light irradiated on the diffusion device can be refracted, light between the light sources and the diffusion board can be effectively diffused more evenly, the light mixing distance between the light sources and the diffusion board is reduced, the ultra-thin design of the straight down type backlight source module is achieved, and the number of the light sources is reduced.

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 reflector cup type airport runway emergency LED lamp which comprises a lampshade, an aluminum substrate, a reflector cup, a positioning column and an LED light source. A curved surface of the reflector cup is a 5-order odd polynomial surface, the inner diameter of the reflector cup ranges from 116mm to 120mm, the coefficient K of the curved surface ranges from 1000 to 1200, and the radius of the curved surface ranges from 2000mm to 2200mm. Owing to unique optical and structural design of the reflector cup of the airport runway emergency LED lamp, a 4-degree included angle is formed between the direction of a primary ray of rays projected onto the reflector cup and a horizontal plane, the light emitting angle of the whole lamp is 360 degrees, and the LED rays maximally irradiate in a specified direction. When an airplane flies at the height of 500 meters, and light of the airport runway emergency LED lamp can be found at a position 10 kilometers away from an airport.

The invention discloses a hidden light source system of aviation barrier lamps. The hidden light source system comprises a high-power red light, an optical cable, a light sensor, optical lenses and anaviation barrier lamp controller, wherein the high-power red light is installed in a control box of a building monitoring room, the optical cable is connected with the high-power red light and the optical lenses, the light sensor is arranged at the place which easily receives ambient light, the optical lenses are arranged on the aviation barrier lamps, the aviation barrier lamp controller is installed in the control box of the building monitoring room, light sources of the aviation barrier lamps are installed in the control box of the building monitoring room, light is transmitted to the aviation barrier lamps of a roof through optical fibers, and the light is scattered through the optical lens, so that the maintenance of the aviation barrier lamps is greatly facilitated, the number of the lamp sources of the aviation barrier lamps is reduced, and electric energy is saved..

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 display device and a backlight module using the same. The backlight module comprises a collimated light source and a light guide plate. The light guide plate is provided witha bottom surface and a top surface which are opposite to each other, and light incident surfaces which are respectively connected to the end parts of the bottom surface and the top surface to receivecollimated light from the collimated light source. The bottom surface inclines from the end portion connected with the light incident surface to the top surface. The bottom surface is provided with aplurality of first grooves which are arranged side by side and extend along the light incident surface. The first groove is provided with a first light receiving surface which is provided with a firstend facing the top surface and obliquely extending away from the light incident surface. Compared with the first light receiving surface closer to the light incident surface, the first end of the first light receiving surface farther away from the light incident surface is closer to the top surface at the vertical projection position of the light incident surface.

The invention discloses a gaze point estimation method and system, and the method is used for a sight tracking device with a single camera and a single coaxial light source, and comprises the steps: obtaining an original image captured from the single camera; collecting human eye feature information of the original image, and calculating pupil light spot center data of two eyes based on the humaneye feature information; based on the pupil light spot center data, acquiring an initial PCR vector by calculation, wherein the PCR vector represents a vector that the light spot center points to thepupil center; normalizing the initial PCR vector by using a preset distance factor to obtain a target PCR vector; and calculating to obtain gaze point information according to the target PCR vector. Only pupil light spot center data is applied during gaze point estimation, the problem that gaze point estimation can be achieved only through two sets of light sources is solved, and therefore the number of light sources of an existing sight tracking device can be reduced, and miniaturization and light weight of the sight tracking device are achieved.

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 provides a dual-light three-color optical system and a sighting telescope thereof. The dual-light three-color optical system comprises a green light chip module, a red light chip module and a rectangular prism, the green light chip module and the red light chip module are vertically arranged; the geometric center of the cubic prism is arranged at the intersection of emergent light rays of the green light chip module and the red light chip module; and a composite film is plated on the diagonal plane, extending along the angular bisector of the included angle of the emergent light rays of the green light chip module and the red light chip module, of the cubic prism, and the composite film is used for totally reflecting the emergent red light of the red light chip module and transmitting the emergent green light of the green light chip module. By arranging a red light source and a green light source with the emergent light perpendicular to each other, green light, red light or yellow light and the like are generated through a control circuit by means of the prism and the total reflection film or the transmission film, and the number of the light sources and the size and weight of the sighting telescope are greatly reduced.

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.