A detachable threaded rod is used in an injection mold, and includes an operation portion, a molding portion, and a screw. The operation portion includes a rod part, the rod part defines a mating hole and a screw hole on a bottom surface of the mating hole. The molding portion includes a front end, a rear end, and a side surface connected between the front end and the rear end. The molding portion defines a cavity on a front end. The molding portion includes a mating portion extending from the rear end and received in the mating hole. The mating portion defines a through hole communicating with the cavity. The molding portion defines external threads on the side surface. The screw penetrates the through hole and screwing in the screw hole, the operation portion is fixed with the molding portion by the screw.

A pair of mold cores (51, 52) for molding an undercut portion (P1) in a holder (30) installed inside a movable mold (13) are connected to and supported by a retaining piece (40) which is moved in the demolding direction, and at the time of demolding, the respective mold cores (51, 52) are guided by guide means (33, 34) from the molding position, where they are contacted with each other, to the mold release position, where they are separated from each other, being moved from one end side to the other end side of the retaining piece (40), in the mutually opposite directions so as to pass each other in the back and forth direction.

A mold structure, a patterning method thereof and a method of fabricating an LCD device using the same are disclosed, which can realize a conformal contact by applying a voltage between a mold structure and a material layer being opposite to each other in an In-Plane Printing process, so as to prevent defective patterns, wherein the mold structure comprises a mold whose surface is provided with patterns; a backplane for supporting the mold; and a conductive film formed between the backplane and the mold.

A curved surface forming device for an adjustable segmented mold board with square rams, consisting of an upper group and a lower group of adjustable molds (4) whose height can be adjusted, and a loading mechanism. The adjustable molds (4) are arranged in the loading mechanism and at least one group of adjustable molds (4) can move up and down under the drive of the loading mechanism. The upper group and the lower group of the adjustable molds (4) are respectively provided with M×N and (M−1)×(N−1) square rams (1) capable of swinging. The upper and the lower square rams (1) are arranged in an interlaced manner in both transverse and longitudinal directions. The square rams (1) are composed of a square plate (a) and the sphere (b) with the pressure imposition surface being a plane or a curved surface. The curved surface forming device can eliminate the crumpling and deformation generated in the board punching, reduce dents and improve processing quality.

The invention describes a regulating device that adapts to the aerodynamic profile of a mold bed made of composite material offsetting the geometrical deviations occurring in the mold bed. The device comprises some stiffening ribs (20) supported on a surface of the bed (10) of the mold and is equipped with actuators (21) that modify the curvature of the bed (10) of the mold.

A concrete side form system suitable for factory casting or site casting concrete. The side form includes a substantially rigid longitudinally extending wall. The wall has a first face to define the edge profile of a concrete panel poured onto a casting bed bounded by the wall and a second face opposite the first face having formation to enable the wall to be secured to the casting bed. The wall includes a longitudinally extending frame having formation along at least one of its edges to removably receive a removable longitudinal insert to provide a shape along an edge of the concrete panel. The removable inserts provide the system with the ability to simply, easily and cost effectively change the edge profile of concrete poured against the side form.

A method for demolding concrete blocks which are cast in a resilient mold supported in a rigid frame, the mold having a top surface and at least one cavity with an opening on the top surface, which cavity holds a cured cast concrete block. The mold has two opposing edges. The demolded blocks are stacked on a collection surface. A support is positioned over the cavity and the mold, the support and the frame are inverted and positioned in demolding apparatus. After two opposing edges of the mold are engaged by the demolding apparatus, the support is withdrawn to allow the mold to sag. The blocks may release from the mold and fall onto the collection surface. If any blocks remain in the mold, a plunger mechanism is pushed against the sagging mold to release the blocks. Guide members may facilitate positioning the blocks on the collection surface.

Provided are a polycrystalline silicon ingot casting mold and a method for producing a polycrystalline silicon ingot casting mold, with which high-quality silicon ingots can be obtained at high yields by minimizing sticking with the surfaces of the silicon ingot casting mold, and losses and damages that occur when solidified silicon ingot is released from the mold. The method for producing a polycrystalline silicon ingot casting mold having a release layer, including: forming a slurry by mixing a silicon nitride powder with water, coating the surface of the mold with the slurry, and heating the mold at 400 to 800° C. in an atmosphere containing oxygen, after coating the slurry.

A mold for forming a coated intramedullary (IM) nail can include a tubular member having an insertion end and an opposite end. The tubular member can comprise a sidewall extending along a longitudinal axis between an outer surface and an inner surface. The sidewall can define at least one threaded inlet port therealong. The tubular member can be configured to receive the IM nail therein. The tubular member can be further configured to locate a flowable material against the IM nail within the inner surface.

A polycrystalline silicon ingot casting mold, and method for producing same. Mold release material being obtained by blending a silicon nitride powder (A) having an average particle diameter along the short axis of 0.6 to 13 μm with a silicon nitride powder (B) having an average particle diameter along the short axis of 0.1 to 0.3 μm at a weight ratio of 5:5 to 9:1; coating the mold surface with the slurry; and a heating the mold at 800 to 1200° C. in an atmosphere containing oxygen.

A vibrating machine for producing a molded body by compacting a granular raw mixture includes an oscillatable vibrating table configured to receive a molding box. A clamping device is produced by at least two clamping closures, each including: a pivot bracket having a lower end being pivotally mounted on the vibrating table and an upper end including a cranking which is directed outward; a double-acting hydraulic pivot cylinder pivotally mounted on the vibrating table; a two-armed rocker arm pivotally connected to the pivot bracket and including an inner part that cooperates with the molding box and an outer part that cooperates with the hydraulic pivot cylinder; and a compression spring disposed between the cranking and the outer part of the rocker arm such that the rocker arm releases from a position closing the respective clamping closure upon a pressure in the hydraulic pivot cylinder being relieved.

A form tie for use in constructing building components and structures, including but not limited to concrete walls, concrete sandwich walls, and concrete foundations is disclosed. The form tie includes a central body portion and two end portions. The two end portions each include a taper that decreases in width inwardly toward the center of the form tie. Also disclosed is a clamp device for releasably securing the form tie to a form assembly. The clamp device includes a tapered passageway that grips a taper of the end portions of the disclosed form tie. Also disclosed is a form assembly including a first form wall, second form wall, and at least one form tie and clamp device of the present invention.

A portable device to compress a bow comprising a pulley system with a block and tackle and fixed pulleys which, by wiring, are connected to a set of fastening supports with fastening ends. The fastening ends fasten and pull the ends of the arms or limbs of a bow, under traction exerted by the block and tackle. The block and tackle has a drive portion and a brake controlling the traction and release of the cables connected to the fastening supports. Upon pulling the drive portion, the block and tackle produces the approach between the first and the second pulleys. This displacement between the pulleys acts on the cables which, through the fixed pulleys, cause the approach between the fastening supports. This displacement of the fastening supports overcomes the resistance of the bow and compresses it. Once the desired compressive level is reached, the brake or blockage is actuated.

A ball feeder assembly for a ball projecting machine includes a stand, an upper frame, a ball delivery element coupled to the frame, and a ball feeder member coupled to the ball delivery element. The assembly is configured for supporting a cylindrical ball bucket. The frame is movably coupled to the stand between at least a first position in which the frame is configured to support the bucket in a position with a top end at a higher elevation than a bottom end such that the longitudinal axis of the bucket is at angle within 0 and 80 degrees from a vertical plane, and a second position in which the frame is configured to support the bucket in a downward position with the bottom end at a higher elevation than the upper end such that the axis is within 5 to 90 degrees with respect to a horizontal plane.

The present invention relates to a device for delivering targets (2) comprising at least one column (4) for storing targets (2) capable of receiving a first target (11) at the lowest point of the column (4) and at least a second target (12) stacked on the first target (11), means for delivering the first target (11), and retention means for retaining the second target (12) in the column (4), characterized in that the retention means for retaining comprise a ramp (21) configured to exert a bearing force on the lower face of the second target (12) during the delivery of the first target (11). This invention also relates to a machine for launching targets (2) equipped with a device and a method for distributing the targets (2).

The present invention discloses a device and method for wireless communication between a paintball marker or gun and it's associated paintball loading device. This wireless communication, whether bidirectional or unidirectional, allows for the transmission of “load” commands and various other useful information between the paintball marker and the paintball feeding device. When the “load” command, which is much more responsive than the “passive” communication found in the prior art, is wirelessly received by the paintball feeding device, the paintball feeding device loads a singular or plurality of paintballs into the paintball marker of appropriate conduit.

A line launching device is provided with a tube for receiving a projectile and including an externally threaded bottom and a cap put on the tube; a cylinder including a first externally threaded extension at one end, an internally threaded cup secured to the first externally threaded extension, a second externally threaded extension at an other end, and an internally threaded ring securing to both the second externally threaded extension and the externally threaded bottom; a hollow anchor fastened in one end of the tube; a hollow fin assembly in a bottom of the projectile and including slits on a housing, pivotal fins, and an internal biasing member biasing against the fins; and a rope having one end attached to the nose and an other end fastened in the anchor. The fins project out of the slits after the projectile being propelled out of the tube by pressurized gas.

An archery bow vibration dampening and balancing device is attachable to an archery bow by means of an elongated clamp with a housing pivotably interconnected to the elongated clamp opposite the attachment point. A vibration dampening and balancing device is secured in an opening formed in the housing.

A face-driver assembly and method for accurate coupling of a face driver with the spindle of a rotary-drive machining device. The assembly includes a face driver, a hub on the spindle defining a prealignment bore, a pair of self-centering coacting tooth sets on the hub and face driver, an engagement post extending into the hub and forming a prealignment shaft closely complementary to the prealignment bore, and a releasable coupling to hold and draw the engagement post rearwardly and thereby join the tooth sets in a manner facilitating final accurate centering.

A positioning device for a driving shaft of a lathe chuck includes a casing, a motor received in the casing with a driving shaft of the motor extending through a first end and a second end of the casing, and a disk disposed to the first end of the casing and threadedly mounted to the driving shaft. The disk has at least one hole defined therethrough and the first end of the casing has a plurality of holes defined therethrough so that a pin is removably extending through the hole in the disk and received in one of the holes in the first end of the casing to position the driving shaft to which the lathe chuck is connected.

A copying cutting device for wood lathes including two securing stems, two form securing devices each transversely mounted at the bottom end of each securing stem, a guide track device mounted above the securing stems, a cutter mounting device having a cutter mounted thereon screwably provided at the bottom side of the guide track device, and a form tracing device screwably disposed at the rear end of the cutter. The forms securing device positions a copy, and a tracing rod of the form tracing device urges against the tracing edge of the copy. The cutter slides in the cutter mounting device, which in turn slides in the guide track device. The cutter cuts the workpiece following the contour of the copy with the help of the tracing rod.

A saw for simultaneously cutting and beveling including a cut-off saw, a cutting blade, and a beveling blade. The cutting blade cuts simultaneously while the beveling blade bevels. The beveling blade preferably has a head with two faces annularly connected by an annular slanted circumference. The head has at least one notch suitable for accommodating a respective at least one tooth insert interconnected with a respective at least one cartridge. Each cartridge is interconnectable with a respective tooth insert.

An automatic lathe is provided including a table stand having a top with a plurality of legs coupled thereto and extending downwardly therefrom. A pair of spindle spinning assemblies are positioned on the top of the table stand. Each spindle spinning assembly has a securement rod rotatably mounted thereon which is adapted to releasably secure to an end of a spindle for spinning the same. A carriage assembly is adapted to slide between each spindle spinning assembly. The carriage assembly has a blade mechanism mounted thereon for engaging a front surface of the spindle secured between the spindle assemblies. The carriage assembly further includes a carriage motor functioning to move the carriage in a forward direction upon the receipt of a forward signal and move the carriage in a reverse direction upon the receipt of a reverse signal only when the carriage motor is actuated. Finally, a reverse direction mechanism serves to transmit the forward signal to the carriage motor when the carriage is moving in a reverse direction and reaches a first end of the top of the table stand. Further, the reverse direction mechanism transmits the reverse signal to the carriage motor when the carriage is moving in a forward direction and reaches a second end of the top of the table stand.

A cutting tool for cutting a work piece and catching debris during turning operations is described herein. The cutting tool comprises a tubular cutting member having first and second ends, the first end having a sharpened edge, and a debris receiving means connected to the second end. The tubular cutting member may have a number of different cross-sections providing a number of different cutting tool configurations for use in turning operations. The debris receiving means may further include a flexible hose having a first hose end and a second hose end, wherein the first hose end is connected to the second end of said tubular cutting member. The hose may be connected to a vacuum source to more effectively collect debris generated during turning operations. The tubular cutting member could be made in a range of sizes from one quarter inch to two inches in diameter, with a nominal tube length of from three inches to twenty inches, or even larger where needed. Both ends of the tubular cutting member could be sharpened, and reversed in the holder when one end is dull.

A lathe attachment device is disclosed for producing long articles with complicated profiles. The device contains a beveled multi-teeth cutter driven to rotate in a direction opposite the rotation of a billet to ensure a very short period of contact time between an individual cutting tooth and the article. The cutter is slightly tilted towards the billet in both horizontal and vertical plane. The teeth of the cutter are shaped to each have a pointed end facing the rough part of the billet. Provisions are made to draw the cutter along the billet. The device allows producing a smooth finished long article with complicated surface profile in a single pass with high productivity. Due to limited contact time, it offers extended life of the cutter. The device is used most advantageously to produce long wood articles.

A composite chair storage device includes a chair, a slide mechanism and an exercise module for storing a composite chair. A first roller and a second roller are embedded into two slide rails for performing linear displacement. With the assistance of a sliding third roller and a pressure element capable of turning over an exercise equipment of an exercise module, the exercise module can be stored into a containing space of the chair or unfolded from the containing space of the chair quickly and conveniently, to achieve the effect of folding and unfolding the composite chair effectively.

Provided is an organic light emitting diode including an organic light-emitting part including a first electrode, an organic material layer having a light-emitting layer, and a second electrode, and an encapsulating layer included on an entire top surface of the organic light-emitting part. Here, the encapsulating layer has a structure in which at least two of a water barrier film, a glass cap, a metal foil and a conductive film are stacked. Accordingly, the diode may have excellent water and oxygen barrier effects, and deterioration of the diode or running failure may be prevented.

The organic light emitting display device includes an organic light emitting display panel and a data driver, wherein the organic light emitting display panel includes an active region which includes pixel driving TFTs for embodying an image and organic luminescent elements respectively connected with the pixel driving TFTs to emit light, a GIP region which includes a gate driver formed with a plurality of gate driving TFTs for respectively driving gate lines of the active region, a GND region formed between the GIP region and the active region to be formed with a base voltage line for supplying base voltage to the organic luminescent elements of the active region, and a sealant region formed with a sealant for attaching an upper substrate to a lower substrate, and wherein the GND region includes out-gassing blocking holes.

An electron emission element (1) includes an electrode substrate (2) and a thin film electrode (3), and emits electrons from the thin film electrode (3) by voltage application across the electrode substrate (2) and the thin film electrode (3). An electron accelerating layer (4) containing at least insulating fine particles (5) is provided between the electrode substrate (2) and the thin film electrode (3). The electrode substrate (2) has a convexoconcave surface. The thin film electrode (3) has openings (6) above convex parts of the electrode substrate (2).

A light emitting device package is disclosed. The light emitting device package includes a package body, at least one light emitting diode disposed on the package body, a molding layer surrounding the light emitting diode, and a phosphor layer provided on the package body, wherein the phosphor layer extends upward from surface of the package body.

Interfaces for electrical (e.g., lighting) devices involve use of electrically conductive edge contacts arranged on or protruding from edges of printed circuit boards (PCBs) that provide or facilitate electrical connections to first and second externally accessible electrical contacts, such as may include threaded and foot contacts of a lighting device including a screw-shaped male base. First and/or second edge contacts of a PCB may protrude through first and second openings in a housing to form first and second externally accessible contact, or directly engage first and second externally accessible contact elements associated with (e.g., retained by) the housing. A contact element retained by a housing may define a slot in the interior of the housing to directly engage an edge contact of the PCB. Electric power is supplied to the PCB via edge contacts without need for intervening wires or soldered connections.

Magnetically adjusting color-converting particles within a matrix and associated devices, systems, and methods are disclosed herein. A magnetic-adjustment process can include applying a magnetic field to a mixture including a non-solid matrix and a plurality of color-converting particles (e.g. magnetically anisotropic color-converting particles). The magnetic field can cause the plurality of color-converting particles to move into a generally non-random alignment (e.g., a generally non-random magnetic alignment and/or a generally non-random shape alignment) within the non-solid matrix. The non-solid matrix then can be solidified to form a solid matrix. A magnetic-adjustment process can be performed in conjunction with testing and/or product binning of solid-state radiation transducer devices. For example, a position, direction, strength, or duration of a magnetic field used to perform a magnetic-adjustment process can be controlled according to optical output collected from a solid-state radiation transducer device. Measuring the optical output and performing the magnetic-adjustment process can be at least partially concurrent.

A method of manufacturing a flexible display device includes: forming a soft substrate on a carrier substrate; forming a thin film layer comprising a display region on the soft substrate; removing a thin film layer excess portion of the thin film layer beyond an edge of the soft substrate; and separating the soft substrate and the carrier substrate.

Solid state light emitting devices include multiple LED components providing adjustable melatonin suppression effects. Multiple LED components may be operated simultaneously according to different operating modes according to which their combined output provides the same or similar chromaticity, but provides melatonin suppressing effects that differ by at least a predetermined threshold amount between the different operating modes. Switching between operating modes may be triggered by user input elements, timers/clocks, or sensors (e.g., photosensors). Chromaticity of combined output of multiple LED components may also be adjusted, together with providing adjustable melatonin suppression effects at each selected combined output chromaticity.

The present invention describes novel indenofluorene derivatives which can preferably be employed as matrix materials for phosphorescent dopants or as electron-transport materials, in particular for use in the emission and/or charge-transport layer of electroluminescent devices. The invention furthermore relates to polymers which comprise these compounds as structural units and to a process for the preparation of the compounds according to the invention and to electronic devices which comprise same.

The present invention relates to an electronic device comprising at least one organic semiconducting material according to the following formula (I): wherein R1-4 are independently selected from H, halogen, CN, substituted or unsubstituted C1-C20-alkyl or heteroalkyl, C6-C20-aryl or C5-C20-heteroaryl, C1-C20-alkoxy or C6-C20-aryloxy, Ar is selected from substituted or unsubstituted C6-C20-aryl or C5-C20-heteroaryl, and R5 is selected from substituted or unsubstituted C6-C20-aryl or C5-C20-heteroaryl, H, F or formula (II).

An organic light-emitting device including: a substrate; a display unit on the substrate; and an encapsulation layer covering the display unit, the encapsulation layer having an alternating stack structure of an organic layer and an inorganic layer, and the organic layer including a polymer polymerized from monomers of Formula 1 and Formula 2:

Compounds (including polymers) for use in hybrid host materials which can be used in electroluminescent devices. The compounds comprise at least one electron-transporting moiety and at least one hole-transporting moiety which are joined by a flexible linker. Hybrid host materials comprising the compounds exhibit stability against phase separation, elevated glass transition temperature, morphological stability against crystallization, and isolation of the electron transporting moiety and hole transporting moiety π-systems.

A carbazole derivative represented by the general formula (1) is provided. In the formula, Ar1 represents a substituted or unsubstituted aryl group having 6 to 10 carbon atoms which form a ring; α and β independently represent a substituted or unsubstituted arylene group having 6 to 12 carbon atoms which form a ring; R1 represents an alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms which form a ring; and R11 to R17 and R21 to R28 independently represent hydrogen, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms which form a ring.

The organic electroluminescence display device has a laminated portion on a base substrate. The device may have a cavernous portion formed by exploding a part of the laminated portion in a screening processing. A protective layer is formed to cover a whole surface of a wall defining the cavernous portion. Therefore, substances contained in the air are prevented from contacting to an organic electroluminescence layer at least partially defining the cavernous portion. Therefore, even if moisture is contained in the air, it is possible to prevent moisture from being absorbed by the organic electroluminescence layer. Moreover, since moisture is not absorbed by the organic electroluminescence layer, it is possible to reduce irregular spot on the device. In addition, it is possible to reduce a short circuit at an open defective portion.

An organic light emitting display panel includes a substrate, an organic light emitting diode disposed on a first side of the substrate, and a first light scattering layer disposed on a second side of the substrate opposite to the first side of the substrate, where the first light scattering layer includes a transparent thin layer including an indium, and a plurality of first micro-lenses is disposed on a plasma-treated side of the first light scattering layer.

A display device includes a laminated wiring formed of a low-resistance conductive film, and a low-reflection film mainly containing Al and functioning as an antireflective film which are sequentially arranged on a transparent substrate, a wiring terminal part provided at an end part of the laminated wiring and has the same laminated structure as that of the laminated wiring, and an insulating film for covering the laminated wiring and the wiring terminal part, in which the insulating film side serves as a display surface side, the wiring terminal part has a first opening part penetrating the insulating film and the low-reflection film and reaching the low-resistance conductive film, and an outer peripheral portion of the first opening part has a laminated structure of the low-resistance conductive film, the low-reflection film, and the insulating film, in at least one part.

According to one embodiment, a semiconductor light emitting device includes a first semiconductor layer, a light emitting layer, a second semiconductor layer, a p-side electrode, a plurality of n-side electrodes, a first insulating film, a p-side interconnect unit, and an n-side interconnect unit. The p-side interconnect unit is provided on the first insulating film to connect to the p-side electrode through a first via piercing the first insulating film. The n-side interconnect unit is provided on the first insulating film to commonly connect to the plurality of n-side electrodes through a second via piercing the first insulating film. The plurality of n-side regions is separated from each other without being linked at the second surface. The p-side region is provided around each of the n-side regions at the second surface.

The present invention relates to a field emission lighting arrangement, comprising a first field emission cathode, an anode structure comprising a phosphor layer, and an evacuated envelope inside of which the anode structure and the first field emission cathode are arranged, wherein the anode structure is configured to receive electrons emitted by the first field emission cathode when a voltage is applied between the anode structure and the first field emission cathode and to reflect light generated by the phosphor layer out from the evacuated chamber. Advantages of the invention include lower power consumption as well as an increase in light output of the field emission lighting arrangement.

A lighting device includes an LED light source that emits light having a first peak wavelength at 430 to 460 nm and a second peak wavelength at 530 to 570 nm.

A method of manufacturing a display panel of an organic light emitting display device includes determining a plurality of pixel groups, the pixel groups corresponding to groups of pixels of the display panel, calculating aperture ratios for the pixels, respective aperture ratios being calculated by pixel group based on respective distances between a power unit and the pixel groups, and forming the pixels of the display panel to have the respective aperture ratios according to the corresponding pixel groups.

A production machine (12) is proposed, in particular a machine tool or the like, having a machine housing (13) for at least partially enclosing the production machine (12) and having an operating state warning light device (1) for the optical display of at least one operating state of the production machine (12), in particular of multiple different operating states, wherein at least one warning light element (1) is provided, which is implemented as a light-emitting diode (1) and has a warning light surface, wherein the warning light element (1) is arranged on a carrier layer, wherein the warning light element (1) has at least one luminescent layer, which emits a warning light and is arranged between a first and a second electrode, in particular a cathode and an anode, wherein better perceptibility is achieved than in the prior art. This is achieved according to the invention in that the machine housing (13) at least comprises the warning light element (1), and in that the electrode surfaces of the electrodes substantially correspond to the warning light surface of the warning light element (1), and in that at least one of the electrodes is light-transmitting and/or transparent.

A double-side light emitting display panel includes a substrate, a plurality of top emission pixel structures and a plurality of bottom emission pixel structures. The top emission pixel structures are disposed on the substrate, and the bottom emission pixel structures are disposed on the substrate. The top emission pixel structures and the bottom emission pixel structures are arranged alternatively on the substrate.

A self-light emitting display unit capable of improving manufacturing yield is provided. Sizes of color pixel circuits corresponding to pixels for R, G, and B are respectively set unevenly within a pixel circuit according to a magnitude ratio of drive currents which allow color self-light emitting elements in the pixel to emit with a same light emission luminance. Thereby, the pattern densities of color pixel circuits respectively corresponding to the pixels for R, G, and B become even to each other, and the pattern defect rate as the whole pixel circuit is decreased.

The light-emitting element of the present invention includes a light-emitting layer and a layer for controlling movement of carriers between a pair of electrodes. The layer for controlling movement of carriers includes a first organic compound having a carrier transporting property and a second organic compound for reducing the carrier transporting property of the first organic compound, and the second organic compound is dispersed in the first organic compound. The layer for controlling movement of carriers is provided in such a manner, whereby change in carrier balance with time can be suppressed. Therefore, a light-emitting element having a long lifetime can be obtained.