428results about "Writing boards" patented technology

The invention discloses a high-quality teaching system which comprises an integrated support which is hung on a ceiling, a control shaft is integrated on the integrated support, the bottom of the control shaft is connected with a projector shell, the high-quality teaching system further comprises a teaching blackboard, a follow-up display structure is arranged on the teaching blackboard, and the follow-up display structure is connected with the projector shell. A following adjusting structure is arranged between the control shaft and the integrated support. The invention relates to the technical field of teaching, according to the high-quality teaching system, through spatial reconstruction and intelligent collaborative design, the problem of spatial conflict between traditional multimedia equipment and a blackboard is thoroughly solved, the integrated support realizes projection and sound equipment aerial integrated layout, and the wall space is remarkably released; the movable blackboard system and the automatic tracking projection cooperatively operate, so that a projection picture is adaptive to a blackboard writing area in real time; the modular design greatly improves the equipment deployment efficiency, a teacher can realize seamless switching of'blackboards, namely screens' without manual adjustment, and a highly flexible and space-intensive teaching environment is constructed.

The invention relates to the technical field of teaching equipment, in particular to an intelligent teaching instrument for law education, which comprises a shell, a connecting rod and the like, and the shell is fixedly connected with a connecting rod. According to the invention, a whiteboard film is pasted on the surface of the curtain, so that a teacher can directly write on the surface of the curtain by using a whiteboard pen without repeatedly switching between the curtain and a blackboard, and two first electric sliding blocks located on the same abutting plate move in opposite directions and drive a cross connecting rod to unfold, so that the operation is convenient, and the teaching efficiency is improved. The crossed connecting rods drive the abutting plates to be far away from each other, so that the folding plates are gradually pulled and straightened through the abutting plates, the abutting plates and the folding plates are matched to form a whole back plate, and when writing is conducted on the surface of the curtain, the abutting plates and the folding plates can serve as supports, so that sinking deformation of the curtain is avoided; therefore, normal writing operation can be carried out on the curtain.

A folding turnover type modularized multimedia teaching blackboard and light environment system comprises a main body, a control module, blackboard modules and a multimedia display module are arranged on the main body, the multimedia display module is rotationally arranged on the main body, and the blackboard modules are rotationally arranged on the two sides of the multimedia display module. According to the technical scheme, the problem that in the switching process of an existing push-pull type multimedia teaching blackboard, visible blind areas of students are caused is effectively solved, it is ensured that the students at all positions in a classroom can obtain continuous and unshielded visual fields, and reading difficulty caused by the limited visual angles is avoided; meanwhile, due to the turnover layout of the blackboard module, occupation of a writing area is avoided, the space utilization rate of a display area and a writing area is remarkably increased, seamless connection of function switching is achieved, and therefore the overall applicability of the teaching environment is optimized.

The present disclosure is directed to a marker pixel wicking apparatus that allows a user to create dimensional pixelated art using a method of applying a colored ink marker directly onto the top white surface of a specifically designed substrate. The substrate has been molded specifically with an array of small vertical flat-topped cylinders covering nearly the entire surface.

To provide an aqueous discoloration body and an aqueous discoloration set capable of extending a maintenance time of an aqueous discoloration image and capable of recognizing whether the aqueous discoloration image is formed with balance by covering with a cover member immediately after forming the aqueous-discolored image by adhering water.SOLUTION: An aqueous discoloration body set comprising an aqueous discoloration sheet 2 having a porous layer in which a low refractive index pigment is fixed in a dispersed state in a binder resin on an upper layer of a colored layer, and a transparent cover member 6 that covers an aqueous discolored image formed by adhesion of water on a surface of the porous layer, suppresses drying of water and delays disappearance of the aqueous discolored image, wherein the transparent cover member is provided with an aqueous discolored body 1 formed by providing a character frame 9 for characters formed on an aqueous discolored sheet and an aqueous adhesion tool forming the aqueous discolored image.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of electronic whiteboards, in particular to a classroom electronic whiteboard all-in-one machine which comprises a rectangular frame, fixed blackboards fixedly installed on the two sides in the rectangular frame, a first sliding blackboard, a second sliding blackboard and an electronic whiteboard fixed to the middle of the rectangular frame. Two symmetrical sliding groove sets are formed in each of the top and the bottom of the rectangular frame, each sliding groove set comprises two transversely-arranged sliding grooves, guide grooves are formed in the ends of the sliding grooves, chamfers are formed in the opposite sides of the two fixed blackboards, and first sliding columns are fixedly connected to the two sides of the top and the two sides of the bottom of the first sliding blackboard. The sliding blackboard has the advantages that when the sliding blackboards are moved, the fixed blackboards cannot affect movement of the sliding blackboards, so that the two sliding blackboards can be smoothly opened in a sliding mode, when the sliding blackboards horizontally move front and back, the first belt can still achieve the purpose of transmission, and the sliding blackboards can smoothly and synchronously slide to be opened or closed.

The objective of this project is to provide a comprehensive electronic whiteboard system that allows various uses by assembling various devices necessary for realizing the GIGA School Initiative at a relatively low cost while leaving the existing whiteboard as it is. [Solution] A first upper hanger rail 5 is placed along the upper edge of an existing blackboard 1, a first lower hanger rail 6 is placed along its lower edge, a second upper hanger rail 7 is placed along the upper side of the first upper hanger rail 5, and a second lower hanger rail 8 is placed along the lower side of the first lower hanger rail 6, a first sliding frame 11 for attaching an electronic blackboard 15 is hung between the first upper hanger rail 5 and the first lower hanger rail 6, and a second sliding frame 12 for attaching a projection-compatible board 16 and a projector 17 is hung between the second upper hanger rail 7 and the second lower hanger rail 8.

This utility model belongs to the field of water turbine technology, specifically a simulation device for the guide vane opening of a hydropower station turbine. It includes a main model and a protective device. A secondary model is fixedly connected to the inner surface of the main model. The protective device is located on the surface of the main model and includes a placement plate that fits over the surface of the main model. Two rotating plates are rotatably connected to the surface of the placement plate. A fixing block is fixedly connected to the upper surface of the placement plate, and a limit block is rotatably connected to the surface of the fixing block. A writing device is provided on the side wall of the placement plate. The writing device includes two fixing plates whose side walls are fixedly connected to the side wall of the placement plate. A moving block is slidably connected to the inner wall of the fixing plates, and a writing plate is fixedly connected to one end of the two moving blocks that are close to each other. By setting up the entire device, the main model can be supported and protected, reducing the possibility of damage to the main and secondary models. It also facilitates explanation and enhances the teaching effect.

The invention discloses a multifunctional portable Chinese teaching board, and relates to the technical field of teaching equipment. The teaching aid comprises a base, a supporting frame is arranged at the top of the base, an adjusting frame is arranged on one side of the supporting frame, and a teaching material plate is arranged in the supporting frame; an adjusting assembly is arranged at the top of the base and comprises a movable shaft, the movable shaft is movably connected between the two sets of teaching material plates, a rotating shaft and a moving shaft are fixedly connected to the two sides of each teaching material plate respectively, supporting shafts are fixedly connected to the top and the bottom of each teaching material plate, and the teaching material plates are rapidly folded through the adjusting assembly. Through the arrangement of the adjusting assembly, after teaching is finished, the moving shaft is manually pushed, the moving shaft pushes the two adjacent teaching material plates to incline with the movable shaft as the axis, the rapid folding function is achieved, meanwhile, the multiple teaching material plates can be folded mutually, the occupied space is reduced, adjustment is flexible, hiding is convenient, and the utilization rate of the classroom space is increased.

Disclosed is a modular educational conference interactive board, which includes a housing and a backboard. A display screen is fixedly installed on the inner wall of the housing. A camera module is fixedly installed on the top end of the housing via a first screw, and an interface module is fixedly installed at the centre of the bottom end of the housing via a second screw. A power supply board and a mainboard are fixedly installed on the inner wall of the backboard. External rails are fixedly connected to both the top and bottom ends of the back side of the housing. Middle rails are slidably connected to the inner walls of the two external rails and inner rails are slidably connected to the inner walls of the two middle rails. The two inner rails are fixedly connected to two ends of the inner wall of the backboard. The sliding arrangement of the rails permits the easy and efficient removal of the backboard from the interactive board for maintenance or upgrades.

The application relates to the technical field of electronic paper, in particular to an electronic paper blackboard device and a control method. A controller is electrically connected with the electronic paper blackboard. An electronic chalk is provided with a first magnet, and the first magnet is detachably connected with the electronic chalk. The electronic chalk is used for changing the magnetic pole direction of a magnetic electronic ink material through the first magnet, so that the color of the magnetic electronic ink material is changed to form written content. A passive blackboard eraser is provided with a second magnet, and the second magnet is detachably connected with the passive blackboard eraser. The passive blackboard eraser is used for resetting the magnetic pole direction of the magnetic electronic ink material through the second magnet, so that the corresponding written content is erased, thereby realizing the traditional blackboard function. The electronic paper blackboard can be conveniently written and erased, and the reflection of the electronic paper blackboard does not affect the vision of children, which is beneficial to human health.

The invention provides an information management statistical device for financial accounting information, and relates to the technical field of financial accounting information management, and the information management statistical device comprises a placement cabinet, a workbench arranged at the top end of the placement cabinet, a switching part penetrating and extending into the placement cabinet, and a multifunctional bearing platform connected with the switching part; the interior of the placement cabinet is hollow and is provided with a preset accommodating space, and one side of the placement cabinet is hinged to the dustproof door; a rectangular through hole is formed in the middle of the workbench, and a protection plate is arranged on the edge of the workbench. The multifunctional bearing table is located in the containing space and can extend out of the rectangular through hole to be flush with the workbench, and a preset working distance is directly reserved between the multifunctional bearing table and the rectangular through hole. Smooth switching of the multifunctional bearing tables can be guaranteed, mutual interference is avoided, and the overall space utilization rate is increased; and a digital statistical component and a paper statistical component are integrated, so that the working efficiency is improved, and the financial accounting information statistical work is ensured to be stably carried out.

The utility model relates to the technical field of office use equipment, in particular to a conference blackboard which comprises a cross-shaped bottom plate, supporting legs integrally formed with the bottom plate are arranged at the four corners of the bottom of the bottom plate, a fixed column is fixedly installed at the top of the bottom plate and is of a hollow structure, and a movable column is installed in the fixed column in a sliding mode. The blackboard has the advantages that the blackboard can be conveniently detached and replaced with a new blackboard, the blackboard can be conveniently rotated, the two faces of the blackboard can be conveniently utilized, and the blackboard is convenient to use, convenient to use and high in practicability. And the use effect can be effectively improved.

The utility model discloses an intelligent blackboard for multi-screen interaction, and relates to the technical field of intelligent blackboards. The intelligent display device comprises a wall surface, an intelligent display screen is fixedly mounted on one side of the wall surface, writing boards are arranged on the portions, located on the two sides of the intelligent display screen, of one side of the wall surface, a mounting plate is fixedly connected to the portion, located above the intelligent display screen, of one side of the wall surface, and a first sliding groove is formed in the top end of the mounting plate; second sliding grooves are formed in the positions, located on the two sides of the first sliding groove, of the top end of the mounting plate, supporting assemblies are arranged in the first sliding groove and the second sliding grooves, and a rack is rotationally connected between the top ends of the two corresponding supporting assemblies through a connecting piece. When the intelligent display screen does not need to be used, the two writing boards are controlled to be closed, the writing boards are used for protecting the intelligent display screen, dust is prevented from being accumulated on the screen, the watching effect is prevented from being affected, meanwhile, economic losses caused by damage to the intelligent display screen are prevented, and the safety performance of the equipment is further improved.

A display board ballistic shield to protect students from gunfire includes a U-shaped base frame comprising a vertically oriented rectangular frame having two vertical posts, a top, and a bottom. The frame defines a vertical plane and a window area therethrough. A base leg having two ends is affixed to each side of the frame at a bottom thereof, each base leg perpendicularly oriented to the plane defined by the frame. A caster is affixed proximate to the ends of each of the base legs. A first ballistic resistant panel has a rectangular metal frame and is mounted within a bottom portion of the frame and coplanar therewith. A second ballistic resistant panel has a rectangular metal frame and is mounted within a top portion of the frame. The second ballistic resistant panel also includes a dry erase display board abutting in layered fashion the second ballistic resistant panel.

The utility model provides a rapid patient opinion feedback display device, and belongs to the technical field of display devices. Comprising a display device body, a feedback box is fixedly connected to one side of the display device body, an observation window is rotatably connected to the interior of the display device body, a supporting rod is rotatably connected to the outer wall of the observation window, and a threaded part is connected to the interior of the supporting rod through threads; the fixing assembly is used for assisting a worker in fixing and dismantling the notice, and the fixing assembly is connected with the display device body. Through the arrangement of the fixing assembly, after a worker opens the observation window, notices of different sizes can be quickly fixed and dismounted through the placing plate, the hook and the connecting rod, and single notices are separately dismounted through the broken groove and the hook, so that the notice fixing and dismounting efficiency of the worker is improved, and the labor intensity of the worker is reduced. And the bulletin using flexibility is improved, operation is easy and convenient, and a worker can use the bulletin conveniently.

The utility model discloses a multifunctional conference display rack, which relates to the technical field of financial economy and comprises an adjusting mechanism, and a display mechanism is arranged on the top surface of the adjusting mechanism. The writing board is driven to slide in a group of sliding rails by pulling the handle, when the writing board slides, the front face of the display board is opened, the two limiting blocks are driven to move, and when the writing board drives the limiting blocks to slide to the same line with the limiting grooves, the reset springs stretch to drive the clamping blocks to stretch out of the limiting blocks and enter the limiting grooves. The two clamping blocks enter the two limiting grooves respectively to fix the position of the writing board, one side of each limiting groove is in an arc shape, a user can connect the electronic equipment with a displayer, conference content can be conveniently displayed, meanwhile, the writing board brings convenience to the user for writing, and if more content is written, the writing board is convenient to use. And the other handle can be pulled to drive the other writing board to slide out of the display board, so that the writing area is increased, and a user can use the display board conveniently.

The utility model provides a multifunctional child building block table, which belongs to the technical field of child toys and comprises a table body, a drawer, a chair, a first panel and a second panel. The table body comprises two side plates which are symmetrically arranged, the drawer is located between the two side plates, the upper end of the drawer is open, a containing space is formed below the drawer, and the chair can be placed in the containing space from the movable side of the table body; a plurality of limiting slideways are formed in the inner sides of the side plates, and the first panel is used as a first decorative top plate or drawing plate through the limiting slideways; and the second panel is used as a second decorative top plate or a building block table plate or a plane table plate by virtue of the limiting slideways. The multifunctional child building block table provided by the utility model is convenient to store, achieves the purpose of realizing multiple functions on the same building block table, and is convenient for children to use.

The utility model discloses an intelligent interactive blackboard with a small sliding blackboard, which belongs to the technical field of interactive blackboards and comprises an outer fixing frame and a fixing platform, an inner fixing frame is fixedly mounted in the outer fixing frame, two motors I are fixedly mounted at the top end of the inner fixing frame, threaded rods I are fixedly mounted at the output ends of the two motors I, and threaded rods II are fixedly mounted at the output ends of the threaded rods I; the first threaded rods are in threaded connection with first sliding plates, the same upper limiting plate is fixedly mounted between the two first sliding plates, the upper limiting plate and the two first sliding plates are slidably mounted in the inner fixing frame, a second motor is fixedly mounted on one side of the inner fixing frame, and a third threaded rod is fixedly mounted at the output end of the second motor. Through cooperation of a plurality of structures, the fixed platform and the main interaction screen can be disassembled and maintained conveniently, the movable blackboard can shield or expose the main interaction screen at any time to adapt to different teaching scenes, sundries can be collected through cooperation of the round buckles and the collection drawer, and the teaching environment is kept clean and sanitary.

The invention is suitable for the technical field of writing tools, and provides a push-pull blackboard and an intelligent blackboard device. The push-pull blackboard comprises a fixed blackboard and a movable blackboard, and the movable blackboard can slide relative to the fixed blackboard in the first direction and is provided with a writing position; one of the fixed blackboard and the movable blackboard is provided with a limiting convex part, and the other one is provided with a limiting concave part; when the movable blackboard is in the writing position, the limiting convex part is inserted into the limiting concave part, and the limiting concave part is used for preventing the limiting convex part from being separated from the limiting concave part in the direction opposite to the first direction. According to the structural design, the movable blackboard is locked at the writing position through mechanical limiting structures such as the limiting convex part and the limiting concave part which are used in a matched mode, the risk that the movable blackboard slides due to touch or writing force can be effectively reduced, it is guaranteed that handwriting is continuous, the position is accurate, and the situation of repeated writing or altering caused by sliding is reduced.

The invention discloses a changeable display device for mathematical drawing learning and training, and relates to the technical field of display devices. The blackboard comprises a blackboard body, the blackboard body is slidably connected with a display main body, the blackboard body is slidably connected with a cleaning brush, the cleaning brush is in threaded connection with a reciprocating threaded rod, the reciprocating threaded rod is rotationally installed on the blackboard body, the blackboard body is provided with a dust suction opening, the dust suction opening communicates with a dust suction mechanism, and the dust suction mechanism comprises a dust suction cylinder arranged on the blackboard body; and a first one-way valve is arranged between the dust collection barrel and the dust collection opening, a sealing ring is slidably connected to the interior of the dust collection barrel, the sealing ring is in threaded connection with a threaded rod, and the threaded rod is connected with a reciprocating threaded rod through a transmission mechanism. The reciprocating threaded rod rotates to drive the cleaning brush, the transmission mechanism is in linkage with the dust suction mechanism, a negative pressure dust suction system is formed, dust generated in the wiping process is sucked in real time, and potential threats caused by dust flying to the health of teaching personnel and students are avoided.

The utility model discloses an interactive teaching display device, which relates to the technical field of teaching tools, and comprises a mounting box and a display board, the front and top of the mounting box are opened, the two sides of the front of the mounting box are fixedly connected with front baffles, and the two sides in the mounting box are fixedly connected with a plurality of groups of clapboards arranged at equal intervals. A plurality of groups of display boards are arranged, each group of display boards is arranged between two adjacent groups of partition boards in a sliding manner, each group of display boards comprises a white board body, the two sides of the white board body are fixedly connected with side boards in sliding fit with the partition boards on the two sides, and the upper end of the back face of the white board body is fixedly connected with a board wiping pad used for cleaning the white board body. And first fixing holes are formed in each group of partition plates. Due to the fact that the number of the whiteboard bodies is large, the whiteboard bodies recording important knowledge points can be erected at obvious positions such as a wall or a table top in the teaching process, and students with poor understanding ability can think continuously.

The utility model discloses a data analysis calculation board, and relates to the technical field of calculation boards. The device comprises a U-shaped plate, the bottom of the U-shaped plate is provided with a support assembly for assisting the support assembly to move, a soft white board is laid on the front side of the U-shaped plate, the left side and the right side of the interior of the U-shaped plate are respectively provided with a winding assembly used for winding the soft white board, and the front side of the U-shaped plate is provided with a frame assembly used for fixing the soft white board. The frame body assembly is controlled to extrude and fix the soft white board again, at the moment, the surface of the soft white board located on the front side of the U-shaped plate is not written, a user can continue to write, the written part of the soft white board passes through the interior of the corresponding strip-shaped hole before being rolled, and therefore the soft white board is not prone to falling off. Due to the fact that the wiping assembly used for wiping the soft whiteboard is arranged in the strip-shaped hole, handwriting written on the surface of the soft whiteboard can be wiped away so as to facilitate later reuse, a user does not need to wait for a long time and wipe the panel in the process, and the use experience of the user is effectively improved.

The application belongs to the field of teaching aids, and particularly relates to a contrast learning device for marketing teaching, which comprises a support frame, assembly plates fixedly connected to the four corners of the back of the assembly frame, a partition plate fixedly connected to the middle end of the inner wall of the support frame, and inner plates symmetrically installed on the two sides of the partition plate relative to the inner wall of the support frame, wherein the device further comprises a driving assembly, a turnover outer plate, a control assembly, a wiping assembly and a dust suction assembly, the driving assembly is installed on the partition plate, one end of the turnover outer plate is installed on the driving assembly, the outer surface of the turnover outer plate is in contact with the outer surface of the inner plate, the control assembly is installed on the turnover outer plate, the wiping assembly is installed on the support frame, and the dust suction assembly is installed on the back of the support frame. Thus, the problems of frequent manual replacement of display content, low cleaning efficiency and complicated operation of the traditional device are solved, and the problems of dust diffusion and pollution of the teaching environment during manual wiping and harm to the health of teachers and students are solved.

The utility model relates to the technical field of engineering cost, in particular to an engineering cost data statistical board which comprises a base, and a frame is rotatably connected to the upper end of the base. The interior of the frame is divided into a first cavity and a second cavity through a transverse rod, and writing boards are rotationally connected into the first cavity and the second cavity. Wherein a locking structure is arranged between the writing boards and the frame, a vertical rod is fixedly installed on the upper portion of the base, and a rotating assembly is arranged between the vertical rod and the transverse rod. By means of the design of the two writing boards, after the frame rotates, transverse and vertical statistical display of the rectangular writing boards can be achieved, and the writing boards are convenient to use. Certainly, the arrangement of the two writing boards facilitates the comparison of different data, so as to further optimize the visual reference in the data statistics process, thereby improving the convenience of data display in the cost statistics process and the applicability in different scenes.

The utility model relates to the technical field of teaching equipment, and discloses portable teaching equipment which comprises a lower box, two folding steel frames, three reinforcing steel frames and a main board, an upper box is hinged to the upper side of the rear end face of the lower box, side grooves are formed in the two sides of the inner bottom face of the lower box, and the lower box is hinged to the side grooves. An adjusting mechanism is slidably arranged between the two side grooves, a second extension plate is hinged to the upper side of the front end face of the main plate, first extension plates are hinged to the two sides of the rear end face of the main plate, and auxiliary plates are hinged to the front sides of the upper end faces of the two first extension plates; two stabilizing sleeves are arranged on the outer end faces of the two folding steel frames in a sliding mode. According to the teaching equipment, the folding steel frame, the main plate, the first extension plate, the second extension plate and the auxiliary plate of the teaching equipment can be folded to be stored between the upper box and the lower box, so that the whole teaching equipment is more convenient to carry, and the teaching equipment can be more flexibly used.

The utility model discloses a writing display board, and relates to the technical field of teaching equipment. Comprising a supporting column, a U-shaped frame arranged at the top end of the supporting column, a display board body arranged in the U-shaped frame in a sliding mode, a material collecting groove formed in the bottom end of the display board body and a telescopic assembly arranged between the bottom end of the display board body and the bottom wall of the U-shaped frame. By arranging the U-shaped frame, arranging the display board body in the U-shaped frame in a sliding mode and arranging the telescopic assembly between the U-shaped frame and the bottom wall of the display board body, the display board body can move up and down in the U-shaped frame under the action of the telescopic assembly, and then the height of the display board body is adjusted; the display board is suitable for users with different heights, so that the use flexibility of the display board is improved; and the collecting groove is formed in the bottom end of the display board body, so that the pencil shavings can be collected and prevented from directly falling onto the ground to pollute the ground.

The utility model provides a Chinese teaching aid, and relates to the technical field of teaching aids, the Chinese teaching aid comprises a writing panel, a fan-shaped panel, a back plate and a control assembly, the control assembly comprises a disc, a circular ring is integrally formed on the surface of the center of the disc, a plurality of driving arms are hinged to the surface of the edge of the disc, and a shaft rod is machined on the surface of the end, close to the control assembly, of the fan-shaped panel; two limiting strips are machined on the surface, located on one side of the shaft rod, of the fan-shaped panel, and a plurality of limiting grooves are formed in the surface, close to one side of the fan-shaped panel, of the back plate; according to the technical key points, a plurality of fan-shaped panels surrounding the periphery of a circular ring at equal intervals are arranged between a writing panel and a back plate, a plurality of driving arms are hinged between a disc on the back face of the circular ring and the fan-shaped panels, and when the circular ring is controlled to rotate outside a supporting column, the disc can push and pull the fan-shaped panels through the driving arms; and the fan-shaped panels are unfolded to the periphery or close to the center between the writing panel and the back plate, so that the use and the storage are convenient.

The application provides a liquid crystal writing device, a writing board, a blackboard and a drawing board for bicolor writing display, comprising a first PET transparent film, a first polymer composite liquid crystal coating, a polymer transparent layer, a second polymer composite liquid crystal coating and a second PET transparent film arranged in layers in sequence; wherein the first side of the first PET transparent film is plated with ITO, and the second side of the second PET transparent film is plated with ITO; the application is divided into two liquid crystal layers, and the coexistence of two writing colors is realized by adjusting the content of chiral compounds, the content of polymerizable monomers and the content of liquid crystals in each polymer composite liquid crystal layer.