83results about How to "Reduce dark areas" patented technology

A light emitting panel comprises a light guiding medium having at least one light emitting face and a plurality of light sources (LEDs) configured to couple light into an edge of the light guiding medium at four or fewer locations around the edge. A pattern of optical features (discontinuities) is provided on at least one face of the light guiding medium for promoting emission of light from the light emitting face. The pattern of features is configured such as to reduce a variation in emitted light intensity over substantially the entire surface of the light emitting face such that the variation is less than or equal to about 25%. The pattern of features is configured in part in dependence on a light intensity distribution within the light guiding medium and the spacing, size, shape and/or number of features per unit area can depend on distance from each light source.

A liquid crystal display with low manufacturing cost, small dark area and compact exterior is provided by utilizing a plurality of differently radiating light emitting diodes at different angles. The liquid crystal of present invention includes a thin film transistor panel for displaying image, a backlight assembly for providing light to the thin film transistor panel with a plurality of light emitting diodes with different light radiation angles and a light guiding plate, and a frame unit for encompassing the thin film transistor panel and the backlight assembly. The light emitting diodes are placed either at the mid-point of light incident surface or the corner portion of the light guiding plate.

The invention provides a monochromatic light chip scale packaging light emitting device having asymmetric light shape. The device comprises a flip-chip LED chip and a reflecting structure and can also comprise a florescent structure so as to form a white light chip scale packaging light emitting device having the asymmetric light shape. The florescent structure comprises a florescent layer and a light transmitting layer, and the bottom surface at least covers the upper surface of the LED chip. The reflecting structure at least partially shields the vertical surface of the LED chip and the side surface of the florescent structure. The invention also provides a manufacturing method of the light emitting device. Therefore, the light emitting angle of the chip scale packaging light emitting device can be effectively limited in a specific direction so as to provide the asymmetric light shape, and thus the application requirements of asymmetric lighting or light source can be met without using additional optical lens and the application advantage of small size can also be maintained.

The invention discloses a display panel and a display device. The display panel comprises a color filter substrate, a liquid crystal layer and a thin film transistor array substrate. The color filter substrate is provided with a first protection layer and a common electrode layer, the thin film transistor array substrate is provided with a second protection layer and a pixel electrode, and the common electrode layer and the pixel electrode are oppositely arranged; the liquid crystal layer comprises liquid crystal molecules, first auxiliary orientation agent molecules and second auxiliary orientation agent molecules, the color filter substrate and the thin film transistor array substrate are aligned and combined into a whole, and the liquid crystal layer is arranged between the color filter substrate and the thin film transistor array substrate. The display panel and the display device can eliminate differences of adhesive force of the second auxiliary orientation agent molecules on different portions of a pixel region, and therefore the occurrence frequency of dark spaces is reduced.

A display apparatus includes a light source and a light guide plate including a light incident surface facing the light source and which receive the light, an opposite surface opposite to the light incident surface and which reflects the light and has an arc shape, connection surfaces at opposing sides of the light incident surface and which connect the light incident surface and the opposite surface, an upper surface connected to the light incident surface, the opposite surface and the connection surfaces and which outputs the light, and a lower surface opposite to the upper surface. The light incident surface of the light guide plate includes a first surface extending in a predetermined direction, and second surfaces inclined from the first surface in an area corresponding to the light source such that an optical recess having a polygonal pyramid shape is defined by the second surfaces.

The invention provides an array substrate, a display panel and a display device. The array substrate comprises a substrate, a first data line and a common electrode line arranged on the substrate; anda first grid line and a second grid line arranged on the substrate, and the first grid line and the second grid line intersect with the first data line and the common electrode line to define a firstsub-pixel. The first sub-pixel comprises a pixel electrode arranged on a substrate base plate; a common electrode disposed on the pixel electrode; and an insulating layer disposed between the pixel electrode and the common electrode. The common electrode comprises a plurality of slits, and the extending direction of the slits is the same as that of the first data lines.

An LED filament contains: a light transmissive substrate, at least one LED chip, a first electrode pin, a second electrode pin, a light emitting layer, and a phosphor layer. The phosphor layer packages the at least one LED chip, and the first electrode pin and the second electrode pin expose outside the phosphor layer. The light emitting layer is made of electromagnetic wave material of different radiation waves, the at least one LED chip produces excitation light source to excite the phosphor layer to illumine lights, and a part of the excitation light source of the at least one LED chip excites the light emitting layer to illuminate the lights after passing through the substrate. The part of the excitation light source excites phosphors of the light emitting layer to illuminate the lights toward the LED filament or the light emitting layer absorbs visible lights converted from infrared lights.

A lighting device includes a bulb shell, a base portion, a light bar module, a core stem, a lamp cap and a driving piece. The light bar module is composed of a plurality of light bars. Each light bar houses a plurality of LED chips. Electrical connectors are set at the two ends of each light bar respectively. The core stem extends upwardly from the base portion and has an expansion portion at the top. The electrical connector of light bars is fixed to the expansion portion. The open end of the lamp cap is connected to the bottom of the bulb shell. The driving piece is placed in the lamp cap. The lighting device achieves a technical effect in which the lighting effect is uniform and the lighting angle is large.

The invention provides a backlight module and a display device. The backlight module comprises a light-emitting element and a light guide plate; multiple light guide slot regions are arranged at one side, close to the light-emitting element, of a reflecting plane of the light guide plate, each light guide slot region comprises multiple light guide slots, and a positive projection of each light guide slot on the reflective plane is arc, and a bending direction of the arc is towards the light-emitting element; a light ray emitted towards an in-light surface of the light guide plate by the light-emitting element is reflected to an out-light surface of the light guide plate through the light guide slots. An angle of departure of the light ray of the light-emitting element after entering the light guide plate can be increased, a dark area and light mixing distance of the light-emitting element are reduced, thereby reducing lower black edge size of the backlight module, and then reducing thelower black edge size of the entire display device, and realizing lower narrow edge design of the display device; furthermore, the thickness of the light guide plate can be reduced on the basis of guaranteeing that all light rays enter the light guide plate, and the thinner and lighter design is realized.

The invention discloses a manufacturing process for LED plastic pulled-tail bubble shells. The manufacturing process includes the following steps that firstly, plastic is subjected to injection molding to form tube blanks which are cooled and shaped, and a central symmetry area is formed on each tube blank; secondly, a tip portion consistent with a blow-molded finished product in shape is formed on the part above the central symmetry area of each tube blank; thirdly, the tube blanks are baked and softened, the tip portions above the central symmetry areas are not baked, while the portions below the central symmetry areas are baked; fourthly, when the blanks are transferred and mold closing is conducted, the central symmetry areas are kept in mold cavity avoidance from a bottom mold body and a cover mold body of a blowing mold, and avoidance cavities are formed in the portions, above and below the central symmetry areas of the tube blanks, of the blowing mold; and fifthly, the baked and softened portions below the central symmetry areas are subjected to blow-molding, and the LED plastic pulled-tail bubble shells are formed. The invention further discloses a manufacturing device for the LED plastic pulled-tail bubble shells. By means of the manufacturing process and device for the LED plastic pulled-tail bubble shells, the illumination angle of the blow-molded LED plastic pulled-tail bubble shells is large, and the LED plastic pulled-tail bubble shells are free of deformation and attractive in appearance.

The invention relates to a self-adaptive lawn trimmer. The trimmer comprises a dragging-type grass trimming structure and an electronic control switch; the dragging-type grass trimming structure comprises a back frame, an accelerator switch assembly, a flexible shaft assembly, a connecting disc, a gasoline engine, a handlebar, an aluminum tube and a soil loosening and weeding head; the soil loosening and weeding head is arranged at the bottom of the aluminum tube, and the handlebar is arranged at the top of the aluminum tube; the gasoline engine is arranged on the connecting disc, the back frame is arranged on the connecting disc, and the accelerator switch assembly is arranged at the top of the handlebar; the electronic control switch is connected with the gasoline engine and object extracting equipment separately and used for controlling the gasoline engine to enter a dormant state when a second authentication instruction is received; the electronic control switch is further used for controlling the gasoline engine to enter an operating state when a first authentication instruction is received. By means of the trimmer, the self-adaptive control level of the lawn trimmer can be increased.

A surface light source assembly includes at least one light emitting element, a light guide plate and a reflective sheet. Each of the light emitting elements has an annular light emitting side surface. The light guide plate has a bottom surface and a light exit surface opposite to the bottom surface. The bottom surface has at least one accommodating recess to accommodate at least one light emitting element. Each of the accommodating recesses has a light incident surface. The bottom surface further has a flat portion and at least one inclined surface portion. Each of the inclined surface portions is connected between the flat portion and the light incident surface of the corresponding accommodating recess. The reflective sheet is disposed below the flat portion. A light source module having the surface light source assembly is further provided.

This invention is a replacement lighting system for signs that can include a first lighting assembly having LED strips disposed on opposite sides. The lighting assembly can be rotatably attached to the lamp holders. A hub can be removably connected to an external power supply, a first lighting assembly and a second lighting assembly. The lighting system can be used to replace existing lighting such as fluorescent tubes and accompanying ballasts without the need to understand remove or rewire the sign electrical components other than attaching the lighting system to the power source. The lighting assemblies can be rotated in the lamp holders to reduce or remove hot spots or dark areas. Multiple lighting assemblies can be connected end to end and be in electrical communication with the power source without necessarily needing to wire each lighting assembly to the power source.

Device for shaping laser radiation which has sub-beams (3) spaced apart in a first direction (X) perpendicular to the propagation direction (Z) of the laser radiation, in particular for shaping laser radiation which is output by a laser diode bar (1), comprising a first refractive interface (8) which can differently deviate at least a multiplicity of the sub-beams (3) of the laser radiation to be shaped, so that they travel at least partially converging together after passing through the first interface (8) more than before passing through the first interface (8), and furthermore comprising a second refractive interface (9) through which the laser radiation can pass after having passed through the first interface (8), the second interface (9) being able to deviate at least some of the sub-beams (3) so that their convergence is reduced.

An LCD panel applied to a curved screen includes display sections and a black matrix layer. The black matrix layer is used for adjusting an area of the primary sub-pixel and an area of the secondary sub-pixel in each of display section, so that an area ratio of the secondary sub-pixel to the primary sub-pixel in the first display section equals to an area ratio of the secondary sub-pixel to the primary sub-pixel in the central display section, an area ratio of the secondary sub-pixel to the primary sub-pixel in the second display section is greater than that of the secondary sub-pixel to the primary sub-pixel in the first display section, an area of the primary sub-pixel in the central display section is lower than that of the primary sub-pixel in the first display section. Therefore, brightness and quality of the curved screen on image display are improved.