KR101681581B1 - Smart electric board variable with transparent and opaque conditions - Google Patents

Abstract

The present invention relates to a smart electronic board changeable from transparent to opaque, enabling a user to selectively use the electric board as an imaging device for the viewing or a black board by selectively realizing in a transparent state or an opaque state. According to the present invention, the smart electric board includes a frame, an imaging device, a variable panel part, a window film, a poly(methyl methacrylate) (PMMA) sheet, a light guide plate, and a control unit. The frame has a plurality of sensors to detect a location of a writing unit. The imaging device is installed at an inner rear portion of the frame and includes a flat display panel to output an image. The variable panel part includes a polymer dispersed liquid crystal (PDLC) layer including the PDLC to transmit or scatters light, an indium tin oxide (ITO) layer interposed between a front surface and a rear surface of the PDLC layer, and coated with Indium-zinc oxide. The PMMA sheet is coupled to a substrate layer formed in front of the variable panel part, coated with an anti-reflective coating solution, and a writing surface allowing writing by a writing unit. The light guide plate diffuses light emitted from a light emitting diode (LED) light source when power is applied thereto so that the definition of a character, which is written, is increased. The window film is attached to a rear surface of the light guide plate, deposited with aluminum (Al) to reflect a portion of light so that the screen image of the imaging device, which is turned off, is not shown. The control unit includes a power supply unit to supply power, thereby adjusting the brightness of the LED light source.

Description

{SMART ELECTRIC BOARD VARIABLE WITH TRANSPARENT AND OPAQUE CONDITIONS}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electronic whiteboard, and more particularly, to a smart electronic whiteboard that can be used in conjunction with a flat panel display device and is transparent and opaque.

In general, the chalkboard is used to explain the content of a class or lecture, or to present a meeting or presentation, in a lecture room or company office, as well as in a classroom in a school.

An ordinary blackboard is composed of a base layer and a sheet layer, and is divided into a greenboard and a whiteboard depending largely on the background color of the sheet layer. The board is classified into a wood board using plywood and a steel board using steel, Depending on the type of writing instrument used on the chalkboard, it can be classified as chalkboard or marker pen.

These blackboards are installed on the walls with a large area in consideration of the amount of boarding, and the mainboard and the auxiliary boardboards integrally installed on both sides thereof are installed together. The auxiliary boardboards on both sides are slidable in the lateral direction, It is used for storage and retrieval.

In recent years, there have been many cases in which assistive tools such as video equipment are used together for teaching or lecturing. On the auxiliary table prepared separately from the blackboard, video devices such as a TV and a monitor are placed and lectured. The apparatuses are separated from each other and it is inconvenient to lecture in connection with the video apparatus, and there is a problem that the concentration of the lecture is dispersed.

Thus, in recent years, as shown in FIG. 1A, a flat panel display device such as a TV or a monitor is installed at a place where the main board is located. However, in the case of using a video apparatus to explain a pamphlet or to use a video apparatus again after the completion of a pamphlet, it is very inconvenient because the auxiliary blackboards on both sides must be repeatedly slid in the lateral direction, And there is a problem of distraction.

In addition, as shown in FIG. 1B, when a projector is used for a lecture or a presentation as a video apparatus, when the projector beam is directly projected on the blackboard, the brightness and sharpness of the projected image are lowered, There is a problem.

In this connection, in Patent Document 1, a frame is coupled to the rear of the plate, and a transparent plate is inserted and fixed in the recessed portion by forming a recessed portion having a predetermined size in the central portion of the plate, A moving screen electronic display device is provided which is provided so as to drive a roll screen composed of an opaque screen portion formed in the screen portion and half of which is the same color as the color of the plate material by a forward and reverse motor, Which has been proposed.

However, when the screen roll is installed separately on the blackboard, the installation cost is high, and there is a disadvantage that the screen roll must be continuously raised and lowered.

Korean Patent Publication No. 2002-0033454 (published May 25, 2002)

SUMMARY OF THE INVENTION The present invention has been made in order to solve all the problems described above, and it is an object of the present invention to provide a video display device and a video display device which can selectively use transparent and opaque displays, It is possible to smoothly progress the steel, and it is possible not only to be able to write during the video lecture or presentation, but also to eliminate the diffuse reflection, increase the visibility and clarity of the image projected on the board, and to transparently transmit the lecture contents And to provide a smart blackboard which can be changed into opaque state.

In addition, when power is applied to the light guide plate, the light emitted from the LED light source is diffused, and even when the room is dark, the sharpness of the letters written increases and the writing function improves. It can be used in various modes by controlling each power supply to be individually supplied or blocked by the integrated controller. It can be operated manually or remotely, and it can be used conveniently by adjusting the light brightness of the LED light source There is a purpose in what can be done.

Then, it is possible to make an electronic book by transmitting the contents written on the variable panel portion with a marker pen or the like, or touching with a finger or an electronic pen so as to appear on the screen of the video apparatus as it is, There is a purpose in what can be done.

According to an aspect of the present invention, there is provided a frame structure comprising a plurality of unit frames connected to each other and including a plurality of sensing sensors for sensing a position of a writing means. A video device provided on an inner rear side of the frame frame and having a flat panel display panel for outputting an image; (PDLC) which is coupled to the inside of the frame and covers the front of the video equipment and is transparent or opaque according to the supply or cutoff of the power supply, and is made of polymer dispersed liquid crystal (PDLC) A variable panel portion including a scattered PDLC layer, an ITO layer formed on the front and rear surfaces of the PDLC layer and coated with indium-tin oxide, and a substrate layer formed on an outer surface of each ITO layer; A PMMA sheet joined to a substrate layer formed in front of the variable panel portion, the PMMA sheet having an antireflection coating liquid formed thereon and having a planographic surface formed by a planer means; A light guide plate attached to the rear surface of the variable panel unit and made of a transparent material and provided with an LED light source having a dimming function and diffusing light emitted from the LED light source when power is applied to increase the sharpness of written letters; A window film attached to a rear surface of the light guide plate to prevent a screen of a video device from being visibly turned off by reflecting a part of light by depositing aluminum; And a control unit for controlling the brightness of the LED light source. The smart electronic whiteboard has a transparent and opaque state.

The present invention also provides a frame structure comprising a plurality of unit frames connected to each other and including a plurality of sensing sensors for sensing the position of the writing means; A video device provided on an inner rear side of the frame frame and having a flat panel display panel for outputting an image; (PDLC) which is coupled to the inside of the frame and covers the front of the video equipment and is transparent or opaque according to the supply or cutoff of the power supply, and is made of polymer dispersed liquid crystal (PDLC) A variable panel portion including a scattered PDLC layer, an ITO layer formed on the front and rear surfaces of the PDLC layer and coated with indium-tin oxide, and a substrate layer formed on the front and rear surfaces of the ITO layer, respectively; A PMMA sheet joined to a substrate layer formed in front of the variable panel portion, the PMMA sheet having an antireflection coating liquid formed thereon and having a planographic surface formed by a planer means; A light guide plate attached to the rear surface of the variable panel unit and made of a transparent material and provided with an LED light source having a dimming function and diffusing light emitted from the LED light source when power is applied to increase the sharpness of written letters; A tempered glass provided between the light guide plate and the video apparatus; A window film attached to the rear surface of the tempered glass and deposited on aluminum to reflect a part of the light so that the screen of the video device turned off is not visible; And a control unit for controlling the brightness of the LED light source, wherein the control unit controls the brightness of the LED light source.

In addition, the flat panel display panel of the present invention may include any one selected from OLED, LCD, and LED.

In addition, the PDLC layer of the present invention may comprise 10 to 20% by weight of a polyfunctional urethane oligomer, 30 to 50% of tetrahydrofurfuryl methacrylate as a diluent, 10 to 30% of 2-ethylhexyl acrylate as a diluent, 0.1 to 10% of propylene glycol diacrylate, 0.1 to 10% of 1,6-hexanediol diacrylate, and 1 to 10% of 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide as a photoinitiator, The diluent and the cross-linking agent preferably have a composition ratio of 100: 1 to 199: 1.

Further, the variable panel portion of the present invention may be provided such that an OCA film is interposed between the PMMA sheet and the LGP sheet, and an OCA film is interposed between the LGP sheet and the LGP sheet.

The non-reflective coating liquid coated on the PMMA sheet of the present invention may contain 40 to 70% of a polyfunctional acrylic oligomer, 20 to 50% of a polyfunctional acrylic monomer, 1 to 5% of a photoinitiator, 1 to 3% of a dispersant, And from 1 to 5% of a cholor resin.

In the LED light source of the present invention, a plurality of lamp groups having the same illumination color may be provided so as to have different colors, and one or more lamp groups may be turned on by the control unit to provide various illumination colors.

The window film of the present invention may further comprise a base layer having a plurality of bends formed thereon, an aluminum thin film layer deposited on the entire surface of the base layer, a transparent layer attached to the front surface of the thin film layer, And a back coating layer coated on the back surface of the base layer.

In addition, the detection sensors of the present invention can be installed to detect only the area where the image is output from the plate surface of the PMMA sheet.

Further, the present invention may further include an electronic punching unit for reading the position of the punching means sensed by the sensing sensors and sending the read punching means to the video apparatus, wherein the electronic punching unit receives the input position signal sensed by the sensing sensors A signal converter for converting the input position signal into an output position signal recognizable by the video apparatus, and an output position signal transmitting unit for outputting the output position signal to the video apparatus, And a display unit for displaying the display unit.

In addition, the control means of the present invention may include an integrated controller and a wireless communication module, wherein the integrated controller includes a power supply for controlling the power supply of the video device, the variable panel portion, the light guide plate, And a dimming control unit for controlling brightness of light of the LED light source. The wireless communication module wirelessly receives a control signal from a smart phone or a remote controller equipped with a dedicated application, .

According to the present invention, by selectively implementing the transparent and opaque displays, it is possible to switch the video apparatuses to the more blackboards and use them, to switch quickly and conveniently, to smoothly progress the steel bars without interruption in the middle, In addition to being able to write in the middle of a presentation, it is possible to eliminate diffuse reflection, increase the visibility and clarity of the image projected on the edition, and deliver the contents of the lecture concentrically.

In addition, when power is applied to the light guide plate, the light emitted from the LED light source is diffused, and even when the room is dark, the sharpness of the letters written increases and the writing function improves. It can be used in various modes by controlling each power supply to be individually supplied or blocked by the integrated controller. It can be operated manually or remotely, and it can be used conveniently by adjusting the light brightness of the LED light source There is an effect that can be.

Then, it is possible to make an electronic book by transmitting the contents written on the variable panel portion with a marker pen or the like, or touching with a finger or an electronic pen so as to appear on the screen of the video apparatus as it is, There is an effect that can be.

1A and 1B are photographs of a blackboard according to a related art.
2A is a perspective view illustrating a smart electronic blackboard according to an embodiment of the present invention.
FIG. 2B is a detailed sectional view of part A of FIG. 2A.
3A is a perspective view illustrating a smart electronic blackboard according to an embodiment of the present invention.
FIG. 3B is a detailed sectional view of part B of FIG. 3A.
FIG. 4 is a diagram illustrating an operation of varying the transparent and opaque states of a smart electronic whiteboard according to an exemplary embodiment of the present invention. Referring to FIG.
FIG. 5A is a view showing a black screen when the power of the video apparatus is turned off in the absence of a window film in the present invention, and FIG. 5B is a diagram showing a black screen invisible when a window film is attached in the present invention.
FIG. 6A is a view showing a configuration of a window film according to an embodiment of the present invention, and FIG. 6B is a detailed sectional view of a portion C of FIG. 6A.
7 is a view showing a configuration of an electronic plate ward according to an embodiment of the present invention.
8 is a diagram for controlling the individual control of each power source of the control means and adjusting the brightness of light of the LED light source according to the embodiment of the present invention.
FIG. 9A illustrates an electronic writing mode of a smart electronic whiteboard according to an exemplary embodiment of the present invention, and FIG. 9B illustrates a general electronic writing mode of a smart electronic whiteboard according to an exemplary embodiment of the present invention.

Hereinafter, with reference to the drawings, specific details for implementing a smart electronic whiteboard which is transparent and opaque according to the present invention will be described in detail with reference to examples.

The smart electronic whiteboard 1 according to the first embodiment of the present invention is transparent and opaque and has a frame frame 100, an imaging device 200, a variable panel unit 300, a PMMA sheet 400, a light guide plate 500, a window film 600, an electronic plate 800, and a control means 900.

2A and 2B, the frame 100 includes a plurality of unit frames 110 connected to each other and having a substantially rectangular frame shape, and a plurality of detection sensors 120 are installed, And the position sensed by the sensing sensor 120 is read by the electronic tablet 800 provided in the computer C and sent to the imaging device 200. [

The detection sensor 120 oscillates infrared rays at various times to receive infrared rays reflected back to the padding means N or to detect the infrared rays generated by the padding means N such as an electronic pen, It may be provided to continuously detect it.

At this time, a plurality of detection sensors 120 are installed in the frame 100 so as not to generate a square, so that the content written by the writing means N is transmitted to the video apparatus 200 for display The sensing sensor 120 is installed at a position where only an image output area of the entire printed surface 410 of the PMMA sheet 400 can be detected and defines the sensing area as a sensor area 420.

The frame 200 may be mounted on the inner side of the frame 100 and the frame may be coupled to the frame 100 directly or by fixing means. May be coupled to surround the rim of the imaging device 200.

The OLED (Organic Light Emitting Diode) is an OLED (Organic Light Emitting Diode) device using a flat panel display such as an OLED, an LED, and an LCD It is self-luminous organic material that emits light by itself. It is thinner and thinner in thickness, driven by lower voltage, has a wide viewing angle and fast response speed, provides image quality over LCD, It is preferable for the video apparatus of the present invention.

The video apparatus 200 is connected to the computer C by a wired or wireless connection so that the video executed by the computer C is displayed on the screen of the video apparatus and displayed on the screen of the school in the classroom of the school, (C) can be used to explain the lesson or lecture contents or to present a meeting or presentation. At this time, a speaker K electrically connected to the video equipment 200 may be installed on both sides of the frame 100.

The variable panel unit 300 is coupled to the inside of the frame 100 and is disposed to cover the front of the video apparatus 200. When the power is supplied through the power supply unit 911, If the power supply of the power supply unit 911 is cut off and the power supply unit 911 is turned off, it can be used as a blackboard using a marker pen or the like if the power supply unit 911 is changed to an opaque state. will be.

2B, the variable panel unit 300 includes a PDLC layer 310 formed of a polymer dispersed liquid crystal (PDLC) and transmitting or scattering light, a front surface of the PDLC layer 310, A transparent ITO layer 320 formed on the rear surface and coated with indium-tin oxide, and a substrate layer 330 formed on the outer surface of each ITO layer 320.

Here, the PDLC layer 310 is a liquid crystal cell used in a liquid crystal display (LCD). The PDLC layer 310 is made of a polymer dispersed liquid crystal, and if the power is not supplied, the liquid crystal molecules become irregular in direction, When the power is supplied, the directions of the liquid crystals are aligned and the refractive indexes of the liquid crystals coincide with each other.

The ITO layer 320 is formed by depositing indium-tin oxide (ITO) on a film such as PET or polyethylene by vacuum evaporation, and is used as a material of a transparent electrode of a thin flat display.

The substrate layer 330 may be made of a thin polyethylene terephthalate (PET) or a glass substrate and protects the inner PDLC layer 310 and the ITO layer 320, To provide strength.

In this case, the PDLC layer 310 is interposed between the two substrate layers 230. At this time, the ITO layer 320, which is a transparent electrode, is formed on the inner surfaces of the two substrate layers 330, A polymer dispersed liquid crystal (PLDC) may be filled between the two ITO layers 320 to form a sealed form, or a film of a polymer dispersed liquid crystal (PLDC) may be inserted and cemented.

In addition, the OCA (Optically Clear Adhesive) film is an optical transparent adhesive film and acts as a tape on both sides. In the variable panel portion 300, an OCA film 340 is interposed and adhered to the PMMA sheet 400 , And an OCA film (340) is interposed between the light guide plate (500) and the light guide plate (500). In this case, the composition for the OCA film 340 may contain 35 to 60% by weight of 2-ethylhexyl acrylate, 25 to 50% by weight of hydroxypropyl acrylate, 1 to 4,4'-dicyclohexylmethane diisocyanate as a curing agent, And 1 to 10% of 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide as a photoinitiator, wherein the 2-ethylhexyl acrylate and the hydroxypropyl acrylate are polymerized to obtain an acrylate polymer And the above-mentioned curing agent and a photoinitiator are mixed and then coated, followed by curing by heating at 70 to 120 ° C.

Also, the PDLC layer 310 may include 10 to 20% by weight of a polyfunctional urethane oligomer, 30 to 50% of tetrahydrofurfuryl methacrylate as a diluent, 10 to 30% of 2-ethylhexyl acrylate as a diluent, 0.1 to 10% of propylene glycol diacrylate, 0.1 to 10% of 1,6-hexanediol diacrylate, and 1 to 10% of 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide as a photoinitiator have.

At this time, the tetrahydrofurfuryl methacrylate and the 2-ethylhexyl acrylate function as a diluent to enhance the adhesion, and the dipropylene glycol diacrylate and the 1,6-hexanediol diacrylate form a polymer , And the diluent and the cross-linking agent preferably have a composition ratio of 100: 1 to 199: 1.

For example, as a diluent, 3.0 kg of tetrahydrofurfuryl methacrylate, 1.7 kg of 2-ethylhexyl acrylate, 0.02 kg of dipropylene glycol diacrylate as crosslinking agent, 0.02 kg of 1,6-hexanediol diacrylate, , And 4,6-trimethylbenzoyl-diphenyl-phosphine oxide were mixed, and then 1.2 kg of the polyfunctional urethane oligomer was added thereto and mixed in a completely homogeneous phase to obtain a polymer dispersed liquid crystal composition. Then, the mixture prepared by mixing the composition with the liquid crystal at a ratio of 3: 7 was coated on the rear ITO film, and the front ITO film was laminated and irradiated with UV light to obtain a polymer dispersed liquid crystal composite.

The thickness of the composite was measured and the T-peel strength was measured. The T-peel strength was measured using a Universal Testing Instrument Model TM instrument and measured on a 200-g load cell. The width of the specimen was 2.54 cm . As a result, it was confirmed that the thickness was 20 占 퐉, the T-peel strength (gm / 2.54 cm) was 230, and the adhesion was very excellent.

Accordingly, when the composition and the composition range and the composition ratio thereof are satisfied, it is possible to realize a PDLC layer having a sufficiently low driving voltage and excellent adhesion between the PDLC layer and the ITO layer, so that the PDLC layer and the ITO layer are not easily peeled or damaged by external impact or physical force will be.

Referring to FIG. 4, when the power is supplied from the power supply unit 911 to the opposing ITO layer 320, the polymer dispersed liquid crystal in the PDLC layer 310 is applied to the electric field (Transparent mode in Fig. 4 (a)) so as to allow light to pass therethrough. At this time, the viewing angle is 150 to 170 degrees and the transmittance is 78% or more. On the other hand, when the power is not applied, polymer dispersed liquid crystals inside the PDLC layer 310 are randomly arranged randomly, so that incident light is scattered to become opaque (opaque mode of FIG. 4 (b)).

Thus, by selectively implementing the transparent and opaque display modes, it is possible to switch the video apparatus to a general blackboard and use it, and it is possible to switch smoothly and conveniently, smoothly without interruption, It is possible to send e-paper during the presentation, and it is possible to concentrate the contents of the lecture.

The PMMA sheet 400 is bonded to a substrate layer 330 formed on the front of the variable panel part 300 and an anti-reflective coating solution is applied on the outer surface of the PMMA sheet 400 to a thickness of 0.5 to 1.0 mm. (410).

The PMMA sheet 400 is made of an anti-reflective coating film. The PMMA sheet 400 can be clearly transmitted without diffused reflection, so that the screen of the display device 200 can be seen more clearly. 0.0 > 340 < / RTI >

PMMA is a polymer material obtained by polymerizing methyl methacrylate (CH ₂ -C (CH ₃ ) COOCH ₃ ) as polymethylmethacrylate, and is usually called acrylic resin. It is transparent and has high light transmittance and hardness It has excellent gloss and light resistance, and is suitable as a plate surface.

The non-reflective coating liquid coated on the PMMA sheet 400 may contain 40 to 70% of a polyfunctional acrylic oligomer, 20 to 50% of a polyfunctional acrylic monomer, 1 to 5% of a photoinitiator, 1 to 3% of a dispersant, And 1 to 5% of choline resin. If the content of the polyfunctional acrylic oligomer is less than 40%, the physical properties of the cured coating film deteriorate to deteriorate durability and adhesion. If the content of the polyfunctional acrylic oligomer exceeds 70%, the viscosity increases and coating becomes difficult. If the content of the polyfunctional acrylic monomer is less than 20%, the adhesive force and surface gloss decrease, while if it exceeds 50%, the physical properties of the cured coating film will be degraded. When the amount of the photoinitiator is less than 1%, the time for curing increases, whereas when the amount exceeds 5%, the degree of stability to ultraviolet light decreases. If the content of the dispersant is less than 1%, the adhesive force is lowered, and if it exceeds 3%, the surface may be contaminated well.

The polythiol resin contains two or more chelating groups in the molecule and is added to increase the adhesive force and to maintain the adhesive force in a high temperature or high humidity environment to increase the reliability. Wherein the polythiol resin is selected from the group consisting of trimethiolpraphan tris 3-mercaptopropionate (TMMP), tri-mercaptopropionyloxyethyisocyanate (TEMPIC), pentaerythritol tetrakis 3-mercapto (PEMP), and dipentaerythritol hexakis 3-mercaptopropionate (DPMP) can be used.

The light guide plate 500 is attached to the rear surface of the variable panel unit 300 to protect the video equipment. The light guide plate 500 is provided with an LED light source 510 having a dimming function and made of a transparent material.

The light guide plate 500 is formed by coating a light emitting material pigment and a hard coating pigment on a PMMA material and diffusing and diffusing the light of the LED light source 510 to the front surface when power is applied to increase the writing function, The visibility and sharpness of the lecture can be increased, and the lecture contents can be conveyed more concentratedly. In particular, when the room is dark, for example, the classroom or the inside of the lecture room is kept dark, the classroom is being performed together with the video image of the video device 200, and the LED light source 510 is powered The letters written in the dark room can be clearly seen by the divergence and diffusion of light of the light guide plate 500 and smooth steel can be progressed without interruption in the middle.

At this time, since the LED light source 510 has a dimming function, the brightness of the light can be adjusted through the dimming control unit 912 of the control unit 900 according to the darkness of the room.

In addition, the LED light source 510 may include a plurality of lamp groups (not shown) having the same illumination color so that they have different colors. For example, the lamp groups may be white, green, and blue. It is possible to select one lamp group and light it by controlling the power supply unit 911 of the control means 900 or to provide a variety of illumination colors by lighting a plurality of lamp groups together so that it can be conveniently used according to the contents of the lesson.

The window film 600 is a type of reflective film attached to the rear surface of the light guide plate 500. The window film 600 is similar to the line-of-sight film for protecting privacy. Aluminum is deposited on the entire surface to reflect only part of the light, The transmittance of the line is about 30 to 55%. As shown in FIG. 5A and FIG. 5B, when a window film is provided directly in front of the video apparatus 200 to allow the video apparatus 200 to transmit the video of the video apparatus 200 forward when the power is supplied to the video apparatus 200, 200 is cut off or the video output is interrupted, a dark black screen is seen to be seen on the plate surface of the PMMA sheet 400, so that the black screen is projected so that the plate surface according to the forward direction does not look neat, It is possible to prevent the writing from being disturbed by the lecture because the writing is dark and the written letters are not clearly visible.

6A and 6B, the window film 600 includes a plurality of curved base layers 610, and a thin film layer 620 on which aluminum is deposited on the entire surface of the base layer 610 A transparent layer 630 such as polyethylene is formed on the entire surface of the thin film layer 620 and a front coating layer 640 is formed on the entire surface of the transparent layer 630 to damage the window film. And a rear coating layer 650 is formed on the rear surface of the base layer 610 to prevent the window film from being damaged.

Since the reflectivity of the light incident from the front increases with the window film 600 having such a configuration, about 30 to 55% of the visible light is transmitted, so that the powered-on video device can be sufficiently viewed, It is enough to cover the screen.

7, the electronic plate reading unit 800 reads the position of the writing means N, which is provided in the computer C and is sensed by the sensing sensors 120, do.

The electronic plate wand 800 includes a receiving unit 810 for receiving the input position signal sensed by the sensing sensor 120, a reading unit 820 for reading the coordinates of the received input position signal, A signal converter 830 for converting the input position signal into an output position signal that can be recognized by the video apparatus 200, and an output position signal outputting unit 820 for outputting the output position signal to the video apparatus 200 to be displayed on the screen of the video apparatus 200 And a sending unit 840.

Accordingly, the smart electronic blackboard 1 of the present invention is applied to the field of the electronic blackboard, and the content written on the variable panel unit 300 with a marker pen or the like or a finger or an electronic pen touches the screen of the video apparatus 200 It is possible to use the electronic apparatus while the video apparatus 200 is turned on and can be conveniently used for searching through the Internet or real-time storage.

8, the control unit 900 may include a power supply unit 911 provided separately from the smart electronic whiteboard 1, installed in the frame 110 of the smart electronic whiteboard 1, And adjusts the brightness of the LED light source 510.

More specifically, the control means 900 includes an integrated controller 910 and a wireless communication module 920.

At this time, the integrated controller 910 controls the LEDs of the video apparatus 200, the variable panel unit 300, the light guide plate 500, and the power source for controlling the supply / And a dimming controller 912 for adjusting the brightness of the LED light source 510.

In addition, the wireless communication module 920 wirelessly receives a control signal from a smartphone S or a remote controller R equipped with a dedicated application so that power control and dimming control can be performed remotely so that the user can quickly and conveniently Can be controlled and used.

The control of the integrated controller 910 of the control unit 900 will be described in more detail. When the electronic apparatus is operated in the electronic book mode in which the electronic apparatus can be watched while watching the screen of the video apparatus 200, The power is applied to the variable panel unit 300 and the detection sensor 120 and the power to the LED light source 510 of the light guide plate 500 is cut off. In such an electronic writing mode, a transparent state is established as shown in FIG. 9A, and an electronic form according to the operation of the sensing sensor 120 and the electronic edition unit 800 together with the screen output of the imaging apparatus 200 becomes possible.

In addition, when the apparatus is used in a general punching mode in which the punching can be performed by a general punching means such as a marker pen, power of the video apparatus 200 is turned off, power is turned off to the variable panel unit 300 and the detection sensor 120 , The LED light source 510 of the light guide plate 500 is powered. 9B, the black screen of the video apparatus 200 is obscured to be opaque, and general writing means such as a marker pen can be used for general writing on the printed surface, so that it can be used as a board will be.

At this time, by controlling the power supply unit 911 of the integrated controller 910, only the video output of the cable connecting the computer C and the video equipment 200 is blocked even when the power of the video equipment 200 is turned on, It is possible to prevent the image from being output to the display unit 200. Thereby, the control of the video output and the mode switching can be quick and easy, and the lifetime of the video equipment can be increased.

The smart electronic whiteboard 1 according to the second embodiment of the present invention can be changed to transparent and opaque states by using a frame frame 100, an imaging apparatus 200, a variable panel unit 300, a PMMA sheet 400, 500, a window film 600, a tempered glass 700, an electronic plate 800, and a control means 900.

3A, the frame frame 100 includes a plurality of unit frames 110 connected to each other to form a substantially rectangular frame, and a plurality of detection sensors 120 are installed to sense the position of the planner unit N And the position sensed by the sensing sensor 120 is read by the electronic tablet 800 provided in the computer C and sent to the imaging device 200. [

3B, the variable panel unit 300 is coupled to the inside of the frame 100 so as to cover the front of the video apparatus 200, and when the power is supplied or cut off, A PDLC layer 310 formed of a polymer dispersed liquid crystal (PDLC) and transmitting or scattering light, a transparent electrode layer 310 formed on the front and rear surfaces of the PDLC layer 310 and formed of indium-tin oxide A coated ITO layer 320, and a substrate layer 330 formed on the front and rear surfaces of the ITO layer 320, respectively.

The smart electronic whiteboard 1 according to the second embodiment of the present invention is coupled to a substrate layer 330 formed in front of the variable panel unit 300 and is formed with an antireflection coating liquid, A LED light source 510 having a dimming function and made of a transparent material and attached to the rear surface of the variable panel unit 300, A light guide plate 500 for diffusing light emitted from the light source 510 to increase the sharpness of the written letters and a light guide plate 500 disposed on the computer C for detecting the position of the writing means N sensed by the sensing sensors 120 And a control unit 900 including a power supply unit for supplying or cutting off a power source, as in the first embodiment.

However, in the smart electronic whiteboard 1 according to the second embodiment of the present invention, the tempered glass 700 is installed between the light guide plate 500 and the video apparatus 200.

The tempered glass 700 is installed in front of the video apparatus 200 to protect the video apparatus 200 and is made transparent and is attached to the variable panel unit 300 by reinforced glass do. As a result, the strength of the variable panel unit 300 can be enhanced to enable more stable writing.

In addition, a window film 600 is attached to the rear surface of the tempered glass 700, and the window film 600 is formed by depositing aluminum and reflecting part of the light, thereby turning off the power or cutting off the video output The black screen is obscured to make it hard to see.

As a result, the smart electronic whiteboard 1, which is transparent and opaque according to the present invention, can selectively use the transparent and opaque displays to switch the video devices to the blackboard, It is possible to proceed smoothly without interruption of the vein in the middle, and it is possible not only to be able to write during the video lecture or the presentation but also to remove the diffuse reflection, increase the visibility and clarity of the image projected on the plate surface, In addition, when power is applied to the light guide plate, the light emitted from the LED light source is diffused, and even when the room is dark, the clarity of the written letters increases to improve the writing function. The black screen can be prevented from being reflected, and each power can be individually And can be used in various modes, and can be manually or remotely controlled. It can be conveniently used by adjusting the brightness of light of the LED light source, and can also be used as a marker pen or the like on the variable panel portion, Or an electronic pen or the like is displayed on the screen of the video apparatus so that the electronic pamphlet can be used, and it can be conveniently used for searching through the Internet or real-time storage.

The present invention is not limited to the above-described embodiments. Anything having substantially the same constitution as the technical idea described in the claims of the present invention and achieving the same operational effect is included in the technical scope of the present invention.

1. Smart electronic board 100. Frame frame
110. Unit frame 120. Detection sensor
200. Video equipment 300. Variable panel unit
310. PDLC layer 320. ITO layer
330. Substrate layer 340. OCA film
400. PMMA sheet 410,
420. Sensor area 500. Light guide plate
510. LED light source 600. Window film
610. Base layer 620. Thin layer
630. Transparent layer 640. Front coating layer
650. Back coating layer 700. Tempered glass
800. Electronic version server 810. Receiver
820. Reading section 830. Signal conversion section
840. Feeder 900. Control means
910. Integrated controller 911. Power supply
912. Dimming control unit 920. Wireless communication module
C. Computer K. Speaker
N. Permanent means R. Remote control
S. Smartphone

Claims (11)

A frame formed by connecting a plurality of unit frames and including a plurality of sensing sensors for sensing the position of the writing means;
A video device provided on an inner rear side of the frame frame and having a flat panel display panel for outputting an image;
(PDLC) which is coupled to the inside of the frame and covers the front of the video equipment and is transparent or opaque according to the supply or cutoff of the power supply, and is made of polymer dispersed liquid crystal (PDLC) A variable panel portion including a scattered PDLC layer, an ITO layer formed on the front and rear surfaces of the PDLC layer and coated with indium-tin oxide, and a substrate layer formed on an outer surface of each ITO layer;
A PMMA sheet joined to a substrate layer formed in front of the variable panel portion, the PMMA sheet having an antireflection coating liquid formed thereon and having a planographic surface formed by a planer means;
A light guide plate attached to the rear surface of the variable panel unit and made of a transparent material and provided with an LED light source having a dimming function and diffusing light emitted from the LED light source when power is applied to increase the sharpness of written letters;
A base layer formed on the rear surface of the light guide plate and having a plurality of curvatures so that a screen of the image display device in which power is turned off by reflecting a part of light by depositing aluminum is formed, A window film comprising a thin film layer, a transparent layer attached to the front surface of the thin film layer, a front coating layer coated on the entire surface of the transparent layer, and a rear coating layer coated on the rear surface of the base layer; And
A smart electronic blackboard having a transparent and opaque state including a power supply for supplying power and control means for controlling the brightness of the LED light source.
A frame formed by connecting a plurality of unit frames and including a plurality of sensing sensors for sensing the position of the writing means;
A video device provided on an inner rear side of the frame frame and having a flat panel display panel for outputting an image;
(PDLC) which is coupled to the inside of the frame and covers the front of the video equipment and is transparent or opaque according to the supply or cutoff of the power supply, and is made of polymer dispersed liquid crystal (PDLC) A variable panel portion including a scattered PDLC layer, an ITO layer formed on the front and rear surfaces of the PDLC layer and coated with indium-tin oxide, and a substrate layer formed on the front and rear surfaces of the ITO layer, respectively;
A PMMA sheet joined to a substrate layer formed in front of the variable panel portion, the PMMA sheet having an antireflection coating liquid formed thereon and having a planographic surface formed by a planer means;
A light guide plate attached to the rear surface of the variable panel unit and made of a transparent material and provided with an LED light source having a dimming function and diffusing light emitted from the LED light source when power is applied to increase the sharpness of written letters;
A tempered glass provided between the light guide plate and the video apparatus;
A base layer formed on the rear surface of the tempered glass and having a plurality of bends so that the screen of the image display device is not visible due to the reflection of a part of the light by being deposited on the rear surface of the tempered glass, A window film comprising an aluminum thin film layer, a transparent layer attached to the front surface of the thin film layer, a front coating layer coated on the entire surface of the transparent layer, and a rear coating layer coated on the rear surface of the base layer; And
A smart electronic blackboard comprising a power supply unit for supplying or cutting off a power source and including control means for controlling the brightness of the LED light source, wherein the control unit is transparent and opaque.
A frame formed by connecting a plurality of unit frames and including a plurality of sensing sensors for sensing the position of the writing means;
A video device provided on an inner rear side of the frame frame and having a flat panel display panel for outputting an image;
(PDLC) which is coupled to the inside of the frame and covers the front of the video equipment and is transparent or opaque according to the supply or cutoff of the power supply, and is made of polymer dispersed liquid crystal (PDLC) A variable panel portion including a scattered PDLC layer, an ITO layer formed on the front and rear surfaces of the PDLC layer and coated with indium-tin oxide, and a substrate layer formed on an outer surface of each ITO layer;
A PMMA sheet joined to a substrate layer formed in front of the variable panel portion, the PMMA sheet having an antireflection coating liquid formed thereon and having a planographic surface formed by a planer means;
A light guide plate attached to the rear surface of the variable panel unit and made of a transparent material and provided with an LED light source having a dimming function and diffusing light emitted from the LED light source when power is applied to increase the sharpness of written letters;
A window film attached to a rear surface of the light guide plate to prevent a screen of a video device from being visibly turned off by reflecting a part of light by depositing aluminum; And
An integrated controller including a power supply unit for controlling supply or cutoff of the respective power sources of the video equipment, the variable panel unit, the light guide plate, and the detection sensor, and a dimming control unit for controlling the brightness of light of the LED light source; And a control unit including a wireless communication module for wirelessly receiving a control signal from a smartphone or a remote controller to adjust power control and dimming by remote control.
A frame formed by connecting a plurality of unit frames and including a plurality of sensing sensors for sensing the position of the writing means;
A video device provided on an inner rear side of the frame frame and having a flat panel display panel for outputting an image;
(PDLC) which is coupled to the inside of the frame and covers the front of the video equipment and is transparent or opaque according to the supply or cutoff of the power supply, and is made of polymer dispersed liquid crystal (PDLC) A variable panel portion including a scattered PDLC layer, an ITO layer formed on the front and rear surfaces of the PDLC layer and coated with indium-tin oxide, and a substrate layer formed on the front and rear surfaces of the ITO layer, respectively;
A PMMA sheet joined to a substrate layer formed in front of the variable panel portion, the PMMA sheet having an antireflection coating liquid formed thereon and having a planographic surface formed by a planer means;
A light guide plate attached to the rear surface of the variable panel unit and made of a transparent material and provided with an LED light source having a dimming function and diffusing light emitted from the LED light source when power is applied to increase the sharpness of written letters;
A tempered glass provided between the light guide plate and the video apparatus;
A window film attached to the rear surface of the tempered glass and deposited on aluminum to reflect a part of the light so that the screen of the video device turned off is not visible; And
An integrated controller including a power supply unit for controlling supply or cutoff of the respective power sources of the video equipment, the variable panel unit, the light guide plate, and the detection sensor, and a dimming control unit for controlling the brightness of light of the LED light source; And a control unit including a wireless communication module for wirelessly receiving a control signal from a smartphone or a remote controller to adjust power control and dimming by remote control.
5. The method according to any one of claims 1 to 4,
Wherein the flat panel display panel includes one selected from an OLED, an LCD, and an LED.
5. The method according to any one of claims 1 to 4,
Wherein the variable panel portion has a transparent and opaque state in which an OCA film is interposed between the light guide plate and the PMMA sheet and an OCA film is interposed therebetween.
5. The method according to any one of claims 1 to 4,
Wherein the LED light sources are provided with a plurality of lamp groups having the same illumination color so as to have different colors, and one or a plurality of lamp groups are illuminated by the control unit to provide various illumination colors. Smart electronic blackboard that can be changed to.
5. The method according to any one of claims 1 to 4,
Wherein the sensing sensors are installed to detect only an area where the image is output from the plate writing surface of the PMMA sheet, wherein the sensing sensors are transparent and opaque.
5. The method according to any one of claims 1 to 4,
Further comprising an electronic pamper unit for reading out the position of the pamphlet means sensed by the detection sensors and transmitting the read out position to the video apparatus,
The electronic punching unit includes a receiving unit for receiving an input position signal sensed by the sensing sensors, a reading unit for reading coordinates of the received input position signal, and a controller for converting the input position signal into an output position signal And a transmission section for transmitting an output position signal to a video apparatus and displaying the video signal on a screen, wherein the transparent and opaque state of the smart electronic blackboard is variable.


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