53 results about "Dark band" patented technology

A method of inspecting a transparent container for refractive defects includes positioning a light source in spaced relationship with respect to a detector which is operatively associated with a processor for receiving electrical signals from the detectors responsive to light passing through the container being received by the detector. The method includes positioning a grid filter having a plurality of alternating dark and light bands adjacent the light source so as to provide a multiple intensity gradient to the container. The container is positioned between the light source and the detector with the grid filter serving to provide adjacent alternate light and dark bands of light impinging on the container. Refractive defects will cause a distortion of the intensity gradient which will be received by the detector. In a preferred embodiment, a plurality of light and dark bands are generally horizontally oriented and produces a generally triangular wave having a constant absolute slope. A processor is employed to receive the electrical signals emitted by the detector responsive to the light impinging thereon and make a determination as to whether refractive defects exist while ignoring desired irregularities in the container. Corresponding apparatus which employs alternating light and dark bands in the grid filter and in the preferred embodiment employs dark bands of single intensity gradient and light bands of single intensity gradient. Each band has a constant gradient of light intensity passing therethrough. The grid filters produces a triangular wave having a constant absolute slope.

The invention discloses a backlight module and a liquid crystal display applying the same. The backlight module at least comprises a backboard, a light source arranged on the backboard, a glue frame which is arranged on the periphery of the backboard and positioned outside the light source, and at least one optical diaphragm arranged on the glue frame. The glue frame at least comprises a main body and at least one supporting part spliced with the main body, wherein the main body and the supporting part form a supporting surface and the supporting part allows light to be transmitted. The optical diaphragm is supported on the supporting surface. According to the invention, under the condition of not making the backlight module generate dark bands, the supporting surface of the optical diaphragm can be effectively enlarged to further stabilize and support the optical diaphragm.

The invention provides a light source light emitting device, a direct-type backlight module with the light-emitting device, a light box module, a planar light radiator, an LCD picture screen, a digital electronic device and a manufacturing method of the light-emitting device and the related products. The light emitting device comprises a plurality of long strip-shaped first light guide structures, a second light guide structure and a light source, the second light guide structure is adjacently spliced with two first light guide structures for receiving and containing the light source in a space which is combined by the two adjacent first light guide structures and the second light guide structure, wherein, patterned reflection layers are formed on the surfaces of the first light guide structures and the second light guide structure which are positioned at the same side of the light source and close to the periphery and the bottom part of the light source, at least optical reflection structures are additionally covered on the patterned reflection layers which are positioned at the bottom surfaces of the first light guide structures and the second light guide structure, thereby allowing light rays emitted by the light source to pass through the patterned reflection layers and the optical reflection structures for diffusion and reflection, improving the light uniformity, promoting the color mixing and reducing the occurrence of a dark band.

A LCD display comprises a LCD plate and a negative light source apparatus with a light conductive plate which comprises a incidence surface with multiple triangle slots and a light-out surface connected with incidence surface; and multiple point-source which is located relatively to the incidence surface. The light beam from the light source goes into light conductive plate through enlarging and diversification angle of triangle slots to decrease dark band. And there located light-out surface apparatus near LCD plate.

An optical wave-guide device is provided between light source and the lower diffuser for the light passing through the optical wave-guide device to form proper deflection and reflection to be consistently diffused through the lower diffuser without creating any blind area among light sources to effectively solve the problem of displaying bright band and dark band on the LCD of the prior art.

The invention provides an electronic device which comprises a liquid crystal display layer, a backlight module and a camera. The liquid crystal display layer comprises a display area, a light supplement area and a first through hole, and the light supplement area is located around the first through hole. The backlight module is provided with a second through hole corresponding to the first throughhole. The camera is arranged in a space formed by the first through hole and the second through hole. No filter layer is arranged or the pixel area is increased in the light supplement area to improve the light transmittance of the light supplement area of the liquid crystal display layer. A light guide plate is provided with scattering particles and microstructures corresponding to the light supplement area to improve the light output efficiency of the light supplement area. The luminous intensity of a direct-down backlight source corresponding to a light source of the light supplement areais larger than that of a light source of the display area to improve the light output intensity of the light supplement area. Thus, the electronic device overcomes the defect that bright and dark bands appear around an original through hole, and original modules of the light supplement area of the electronic device are designed to realize the double functions of photographic light supplement and illumination.

The invention discloses a back light module comprising a light guide plate, at least one separation type light source and a plurality of reflection sheets. The light guide plate is provided with at least one light entering surface and at least one light exiting surface which are vertical to each other; the at least one separation type light source is used for irradiating the light entering surface of the light guide plate; and the reflection sheets are arranged on the light entering surface and are adjacent to the separation type light source. For the back light module, the reflection sheets are arranged in a dark band zone of the light entering surface of the light guide plate of the back light module, and the reflection sheets generate reflection by light beams in the dark band zone so that rays of light are uniformly shot from the light exiting surface of the light guide plate so as to solve the problem of light dark bands of the back light module.

The present invention relates to a backlight module and its light-conducting plate. Said backlight module includes light-conducting plate and several point light sources, and said light-conducting plate includes light incident face, light-emerging face crossed with said light incident face and bottom face opposite to the light-emerging face. Said several point light sources are placed correspondently to the light incident face, and in the zone where the light incident face is coupled with point light sources several refractive and scattering fine grains are formed. Said ivnention can reduce incident dark band of the light-conducting plate, so that the light-conducting plate and the backlight module adopting said light-conducting plate have higher homogeneity of emerged light.

The invention relates to a light guide plate and a backlight module. And the light guide plate comprises a light incoming surface, a light outgoing surface intersecting the light incoming surface and a bottom surface opposite to the light outgoing surface, where the light incoming surface is of a columnar prism structure and has a sub-wavelength reflective grating which is used to improve the light incoming efficiency and can eliminate the dark band phenomenon caused by using light sources. And the light guide plate can provide high efficiency and high uniformity irradiation for a LCD module.

The invention discloses a manufacturing method and applications of an otolith cross section grinding sheet of a mandarin fish and belongs to the field of fish ecology. According to the manufacturing method, a sagitta serves as a research material, a cross section of the sagitta is subjected to sheet grinding, the manufactured otolith grinding sheet is placed under a microscope, the age can be identified and widths between rings can be measured through charge coupled device (CCD) software under the irradiation of incident light, ring distribution features of the otolith grinding sheet are observed, and then the age of the mandarin fish is identified. Compared with traditional identification methods, the method has the advantages that rings of the otolith of the mandarin fish are clear and visible, and an otolith nucleus is inclined towards one side of the otolith grinding sheet to form a linear nucleus area; a band area in which bright bands and dark bands are staggered is formed on the other side of the otolith starting from the otolith nucleus, bright bands are wide and are formed from spring to autumn, and dark bands are narrow and are formed in winter, so that annual rings are formed. By the aid of rings with alternating bright bands and dark bands, the age is distinguished and judged easily, so that the accuracy of identification of the age of the mandarin fish is greatly improved.

The liquid crystal display includes one rectangular frame with four sides; one light guiding plate set inside the rectangular frame; one reflecting plate adjacent to the light guiding plate; one chemical diaphragm set on the reflecting plate; one liquid crystal display panel set on the chemical diaphragm and embedded into the rectangular frame and LEDs on one side of the rectangular frame with different irradiation directions. The present invention can reduce dark bands in LCD, make homogeneous brightness in the visual area, raise the central gray and raise image quality without raising cost.

This invention supplies a back light module, which at least concludes one illuminant and one light guide plate. This light guide plate has a light-entry surface and a light-outward surface that next to the light-entry surface. This back light module also concludes at least a multireflection device that can make light beam emitted by the illuminant couple to beam path of light-entry surface. Through this reflection device, the angle of departure of illuminant is enlarged. This can slake the dark band that is generated when light enter into light guide plate. This can increase luminance of the back light module and make the structure simplify.

The invention relates to a structure for improving dark bands of a backlight module and a method thereof, wherein, a plurality of light sources are arranged on an incident light surface of a diffusion plate of the direct backlight module; a plurality of minimum thickness which is less than the average thickness of the diffusion plate are distributed on the diffusion plate between two light sources; and original light sources with greater light quantity are provided from the position of the minimum thickness or original light sources which are relatively more mixed are provided so as to lower or eliminate the dark bands of the diffusion plate generated between two light sources.

The invention discloses a backlight module that could reduce the dark band area. Two proximate LED in the backlight module structure are set next to light guiding board. Each emitting side is inclined outward a preset angle. The outside included angle between the two emitting sides is between 90 degree and 180 degree.

The invention discloses a light guide plate and a method for manufacturing the same. The light guide plate comprises a main body possessing a light incoming side, a plurality of main micro-structures arranged at the light incoming side, and a plurality of secondary micro-structures distributed on the surfaces of the main micro-structures. The maximum size of the secondary micro-structures is greater than 0 nanometer and less than 100 nanometers. By utilizing the secondary micro-structures, the light full-reflection phenomenon can be reduced effectively, the loss when the light is radiated to the light guide plate is avoided; and by increasing the dissipation angle when the light is radiated to the light guide plate, the phenomenon can be relieved that light beams are concentrated at the front end of a light source to cause the light outgoing surface of the light guide plate to generate bright and dark belts.

The present invention discloses an optical lens and a light-emitting device using the optical lens. The optical lens includes a bottom face, a light-emitting face and a full reflecting face. The full reflecting face extends from the bottom to outer side and is towards to the light-emitting face. According to the full reflecting face, the light-emitting angle of the light reflected by the full reflecting face is less than 150 degrees so that a dark band region is supplied with a light intensity.

The invention discloses a backlight module. The backlight module includes a light emitting module, a support frame, a diffusion plate and a light guide. The light emitting module is arranged on a substrate and emits light. The support frame has a first support part, a diagonal part, a bearing part and a second support part connected in sequence. The first support part is adjacent to the light emitting module. The diffusion plate bears against the bearing part to receive light, and the area where the diffusion plate bears against the bearing part is formed as a bearing area. The light guide isprovided at least in the diagonal part, or at least in the bearing part, so that the light is transmitted to the bearing area. Therefore, the backlight module can improve the dark bands on the edge ofthe display surface of a display.

The invention provides a silk printing-free light guide plate, which comprises a light incoming surface, a light outgoing surface and a dot structure, wherein the dot structure is arranged on the light outgoing surface; the light outgoing surface comprises an upper side edge, a lower side edge, a left side edge, a right side edge, a first center line of the upper side edge and the lower side edge, and a second center line of the left side edge and the right side edge; the dot structure is formed by a plurality of semicircle ball-shaped dots; densities of the dots are increased gradually from the upper side edge to the first center line; densities of the dots are increased gradually from the lower side edge to the first center line; densities of the dots are increased gradually from the left side edge to the second center line; and densities of the dots are increased gradually from the right side edge to the second center line. The thickness h of the light guide plate is 1.5 to 5 mm; the protruding heights n of the dots on the light surfaces are between 0.05 to 0.5 mm; and the radiuses r of dots are between 0.1 to 0.5 mm. An uneven brightness degree phenomenon caused by a hot dot and a dead lamp can be improved, the light guide plate does not generate beam, halo and dark band phenomena easily on the light outgoing surface, and the light outgoing is more uniform.

The present invention provides a kind of light guide plate and back light module with the said light guide plate. The light guide plate includes one display area and one adjacent redundant area, the display area corresponds to the main display area of the display panel, and the redundant area is used for isolating the dark band caused by uneven incident light and includes one light incoming surface. The light guide plate and the back light module with the said light guide plate have the advantage of simple design.

A light guide plate comprises a light incidence face for receiving incident light beams, a light emission face adjacent to the light incidence face and a bottom face opposite to the light emission plate. The light incidence face is perpendicular to the light emission face and formed by sinking of the peripheral face of the light guide plate towards the interior of the light guide plate. The incident light beams are subjected to incidence into the light guide plate through the light incidence face and are refracted towards sides adjacent to the light incidence face to form uniform light field distribution on the section of the light guide plate parallel to the light emission face. The invention further provides a backlight module using the light guide plate. According to the light guide plate and the backlight module, the light incidence face is sunken towards the interior of the light guide plate from the peripheral face of the light guide plate, and the incident light beams are subjected to incidence into the light guide plate through the light incidence face and are refracted towards the two sides of the light guide plate, so that dark zones at the edges of the light guide plate can be effectively reduced, and the light ray utilization rate of the light guide plate can be improved.