CN108920023B

CN108920023B - Intelligent blackboard

Info

Publication number: CN108920023B
Application number: CN201811125908.XA
Authority: CN
Inventors: 林祖明
Original assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd; Guangzhou Shirui Electronics Co Ltd
Current assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd; Guangzhou Shirui Electronics Co Ltd
Priority date: 2018-09-26
Filing date: 2018-09-26
Publication date: 2024-05-10
Anticipated expiration: 2038-09-26
Also published as: CN108920023A

Abstract

The invention discloses an intelligent blackboard which comprises a main screen and an auxiliary screen arranged on one side of the main screen, wherein the auxiliary screen comprises a cover plate, a writing presentation plate and a touch device, and the touch device is used for identifying touch operation on the writing presentation plate; the main screen is used for generating video data according to touch operation; the tablet is responsive to the video data and presents image information corresponding to the video data. According to the intelligent blackboard, information intercommunication can be realized between the main screen and the auxiliary screen, when the written content is touched on the cover plate of the auxiliary screen, the touch operation on the writing presentation plate can be recognized by the touch device, the main screen can generate video data according to the touch operation, and the writing presentation plate is driven to respond to the video data, so that image information corresponding to the video data can be clearly presented.

Description

Intelligent blackboard

Technical Field

The invention relates to the technical field of intelligent electronic equipment, in particular to an intelligent blackboard.

Background

The existing intelligent blackboard generally comprises a main screen and two auxiliary screens, wherein the two auxiliary screens are respectively arranged on two sides of the main screen, and the main screen is a large-screen integrated machine with an operating system and can be operated in a touch mode.

The secondary screen generally has two structures: an auxiliary screen made of ground glass or an auxiliary screen made of a liquid crystal film.

Frosted glass sub-screens can be written with normal chalk, but have the following disadvantages: 1. the frosted glass has serious reflection, and under the direct irradiation of strong light, the content written by chalk can not be seen clearly; 2. the writing content cannot be automatically stored; 3. and cannot communicate with the home screen information. The auxiliary screen made of the liquid crystal film can write by using a finger or a hard object in a touch manner, and the liquid crystal film can detect writing tracks, so that display is realized by controlling liquid crystal deflection.

The writing principle of the liquid crystal film is as follows: referring to fig. 1, the liquid crystal film includes a first substrate 1', a first electrode layer 2', a liquid crystal layer 3', a second electrode layer 4', a second substrate 5', and a base plate 6' sequentially disposed from outside to inside, and when the first substrate 1' is pressed by a finger or other hard object, force is transferred to the liquid crystal layer 3', liquid crystal molecules of the liquid crystal layer 3' are converted from a first stable state to a second stable state, and in the second stable state, light can penetrate the liquid crystal layer 3' to reflect the color of the base plate 6', thereby realizing writing and display. When the reset is needed, reset voltage is applied to the two ends of the first electrode layer 2 'and the second electrode layer 4', and liquid crystal molecules in the second stable state are converted into the first stable state, so that light is shielded, and the writing content is cleared. The liquid crystal film sub-screen has the following disadvantages: 1. the light passes through the first substrate 1' and the liquid crystal layer 3' to the bottom plate 6', is reflected and then reflected by the liquid crystal layer 3' and the first substrate 1', so as to be received by human eyes, and each layer of structure causes light loss, so that the contrast of a picture is insufficient, and in addition, when the light of the external environment is strong, written handwriting is displayed in an unclear way; 2. when teaching in indoor structures such as a spacious classroom, the characters are generally required to be written with large thickness, otherwise, long-distance personnel cannot see clearly, and when writing with large thickness, pens or other hard objects with the same large thickness are required to be used, so that the operation is inconvenient; 3. when the liquid crystal film is used for removing handwriting, the removal voltage is given, the first electrode layer 2 'and the second electrode layer 4' are of an integral structure, and once the liquid crystal film is pressurized, all handwriting on the liquid crystal film can be removed at the same time, and the auxiliary screen cannot be removed locally, or a local coating mode is adopted, so that the operation difficulty is increased; 4. the sub-screen of the liquid crystal film has a problem of poor viewing angle because the degree of light transmittance is adjusted by liquid crystal deflection.

Disclosure of Invention

One object of an embodiment of the invention is to: provides an intelligent blackboard, which has convenient writing of a secondary screen, can realize local erasing and has clear handwriting.

It is another object of an embodiment of the present invention to provide a smart blackboard in which the sub-screen and the main screen are information-enabled, and the main screen can store the writing contents of the sub-screen.

To achieve the purpose, the embodiment of the invention adopts the following technical scheme:

The intelligent blackboard comprises a main screen and an auxiliary screen arranged on one side of the main screen, wherein the auxiliary screen comprises a cover plate, a writing presentation plate and a touch device, and the touch device is used for identifying touch operation on the writing presentation plate;

the main screen is used for generating video data according to the touch operation;

the writing presentation board is responsive to the video data and presents image information corresponding to the video data.

As a preferable scheme of the smart blackboard, the writing presentation board is further used for responding to the touch operation and presenting image information corresponding to the touch operation.

As a preferred scheme of the smart blackboard, the smart blackboard further comprises an image driver for receiving video data and driving the writing presentation board to present image information corresponding to the video data.

As a preferable mode of the smart blackboard, the image driver is provided in the sub-screen.

As a preferable scheme of the intelligent blackboard, the touch device comprises an infrared touch frame and a touch driver, wherein the infrared touch frame is arranged around the outline of the writing presentation board; the infrared touch frame is used for identifying touch operation occurring on the writing display board, and the touch driver is used for converting the touch operation into a touch signal.

As a preferred scheme of the smart blackboard, the touch device comprises a capacitive touch film and a touch driver, wherein the capacitive touch film is positioned between the writing presentation board and the cover board; the capacitive touch film is used for identifying touch operation occurring on the writing presentation plate, and the touch driver is used for converting the touch operation into a touch signal.

As a preferable scheme of the intelligent blackboard, the touch device comprises an electromagnetic touch film and a touch driver, wherein the electromagnetic touch film is positioned between the writing presentation plate and the cover plate, or positioned on one side of the writing presentation plate, which is opposite to the cover plate; the electromagnetic touch control film is used for identifying touch control operation occurring on the writing display board, and the touch control driver is used for converting the touch control operation into a touch control signal.

As a preferable scheme of the intelligent blackboard, the writing presentation board is an electro-active display device, and the electro-active display device is driven by an electric signal to display image information corresponding to the electric signal.

As a preferable scheme of the intelligent blackboard, the writing presentation board is an electronic ink screen.

As a preferable scheme of the intelligent blackboard, the writing presentation board is an organic electroluminescent display screen.

As a preferable scheme of the intelligent blackboard, the writing display board is a liquid crystal display screen.

As a preferable scheme of the intelligent blackboard, the writing presentation board is an LED screen.

As a preferable scheme of the intelligent blackboard, the electronic ink screen is provided with a backlight module.

As a preferable scheme of the intelligent blackboard, the writing presentation board is formed by splicing a plurality of unit presentation boards into a whole.

As a preferred scheme of the smart blackboard, the touch device comprises a capacitive touch film and a touch driver, wherein the capacitive touch film is positioned between the writing presentation board and the cover board; the capacitive touch control film is used for identifying touch control operation aiming at the writing presentation plate, and the touch control driver is used for converting the touch control operation into a touch control signal;

the unit presentation plates are correspondingly provided with the touch films, and are respectively connected with the touch driver.

As a preferable scheme of the intelligent blackboard, the electronic ink screen comprises a plurality of pixels, wherein a first side surface of each pixel is provided with a first color, a second side surface of each pixel is provided with a second color, and the first color and the second color are different.

As a preferable scheme of the intelligent blackboard, the first color is any one of black, green, red, purple, blue, gray and orange, and the second color is white.

As a preferable scheme of the intelligent blackboard, the organic electroluminescent display screen is an active matrix organic electroluminescent display screen.

As a preferred scheme of the smart blackboard, the organic electroluminescent display screen comprises a plurality of pixels, wherein the pixels are composed of a first sub-pixel and a second sub-pixel, and the colors of the first sub-pixel and the second sub-pixel are different.

As a preferable scheme of the smart blackboard, the first sub-pixel is green, and the second sub-pixel is red.

As a preferable scheme of the intelligent blackboard, two sides of the main screen are respectively provided with the auxiliary screen.

As a preferable scheme of the intelligent blackboard, the cover plate is made of ground glass, acrylic plate or plane glass.

The embodiment of the invention has the beneficial effects that: according to the intelligent blackboard, information intercommunication can be realized between the main screen and the auxiliary screen, when the written content is touched on the cover plate of the auxiliary screen, the touch operation on the writing presentation plate can be recognized by the touch device, the main screen can generate video data according to the touch operation, and the writing presentation plate is driven to respond to the video data, so that image information corresponding to the video data can be clearly presented.

Drawings

The invention is described in further detail below with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of a liquid crystal film of the prior art.

Fig. 2 is a schematic diagram of a smart blackboard according to an embodiment of the present invention.

In fig. 1:

1', a first substrate; 2', a first electrode layer; 3', a liquid crystal layer; 4', a second electrode layer; 5', a second substrate; 6', a bottom plate.

In fig. 2:

1. a main screen; 2. a secondary screen; 21. a cover plate; 22. a writing presentation board.

Detailed Description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Referring to fig. 2, an embodiment of the present invention provides a smart blackboard, including a main screen 1 and a sub screen 2 disposed at one side of the main screen 1, the sub screen 2 including a cover plate 21, a writing presentation plate 22, and a touch device for recognizing a touch operation occurring on the writing presentation plate 22; the main screen 1 is used for generating video data according to touch operation; the writing presentation pad 22 is responsive to the video data and presents image information corresponding to the video data. The intelligent blackboard of the invention can realize information intercommunication between the main screen 1 and the auxiliary screen 2, when the writing content is touched on the cover plate 21 of the auxiliary screen 2, the touch operation on the writing presentation plate 22 can be recognized by the touch device, the main screen 1 can generate video data according to the touch operation, and the writing presentation plate 22 is driven to respond to the video data, so that the image information corresponding to the video data can be clearly presented.

In this embodiment, the video data is obtained according to the touch information of the main screen 1 or the sub screen 2, for example: a responsive icon on the touch main screen 1 or the sub screen 2, a touch gesture given to the main screen 1 or the sub screen 2; or is obtained according to a pre-command for the main screen 1, for example, the main screen 1 controls the sub-screen 2 to play video media information, and the main screen 1 continuously outputs video signals according to the pre-command of play.

Thereby, the sub screen 2 can realize the interactive function with the main screen 1, not limited to: the sub screen 2 is a screen extension of the main screen 1, or a screen extension; the secondary screen 2 and the main screen 1 display the same or different contents for comparison and reference; the main screen 1 receives the touch information of the main screen 1 and the auxiliary screen 2, so that the touch information can be stored and forwarded after being recognized and rendered into an image, and one embodiment is as follows: the teacher in the classroom uses the intelligent blackboard of the embodiment to conduct teaching, all blackboard writing contents can be stored and rendered into images by the main screen 1, and the images are forwarded to students after the lessons so as to facilitate review of the students after the lessons. In this embodiment, the main screen 1 and the auxiliary screen 2 can realize interaction through the above technical scheme, and specific interaction modes are not described herein.

In this embodiment, the sub-screen 2 is a screen that can only implement touch writing and image presentation. The secondary screen 2 with the structure can realize information intercommunication with the primary screen 1. The smart blackboard of the embodiment of the invention is obviously different from the smart blackboard structure of the combination of the prior main screen 1 and the glass writing board, and is also different from the structure of the prior multi-screen splicing, wherein the prior multi-screen splicing adopts a plurality of independent screens with autonomous processing (similar to the main screen 1 of the invention) to splice into a display component with larger size, and each small module can realize autonomous processing.

In a preferred embodiment of the present invention, the writing presentation pad 22 is also used to respond to a touch operation and present image information corresponding to the touch operation.

In the first embodiment, the touch information identification process of the secondary screen 2 is: touch devices are arranged on the main screen 1 and the auxiliary screen 2, touch operation on the auxiliary screen 2 is identified by the touch devices on the auxiliary screen 2, touch information is obtained after identification, the touch information is started to the main screen 1, a processor of the main screen 1 obtains corresponding main screen video data and auxiliary screen video data according to the touch information, then the corresponding auxiliary screen video data is sent to the auxiliary screen 2, an image driver in the auxiliary screen 2 converts the auxiliary screen video data into a frame-by-frame driving signal, and the driving signal is sent to a pixel circuit or a driving circuit, so that the auxiliary screen 2 is controlled to display corresponding images. In this embodiment, the processor of the main screen 1 divides the touch information of the auxiliary screen 2 into the main screen video data and the auxiliary screen video data, mainly for simultaneously presenting one touch information on the main screen 1 and the auxiliary screen 2, and of course, the processor of the main screen 1 may directly process the touch information to be only the auxiliary screen video data, and then send the auxiliary screen video data to the auxiliary screen 2 to realize display.

In the second embodiment, the difference between the first embodiment and the second embodiment is that the main screen 1 and the auxiliary screen 2 share a touch film, and in actual operation, the touch film is divided into a first area and a second area, and the touch operation identified by the second area is used as the touch information of the auxiliary screen 2, and the rest is the same as the scheme of the first embodiment.

In the third embodiment, the difference between the first embodiment and the second embodiment is that a separate sub-screen image processor is designed in the main screen 1 in the third embodiment, and is used for processing the forwarding of the video signal and the touch information from the sub-screen 2, the process of touch information identification is the same as that of the first embodiment and the second embodiment, and the forwarding of the video signal is as follows: the processor of the main screen 1 sends video data to the sub-screen image processor, and the sub-screen image processor processes the video signal (such as intercepting the sub-screen video data), or sends the processed video data to the sub-screen 2, and the sub-screen 2 displays images.

According to the embodiment of the invention, the hardware is integrated in the main screen 1, so that the main screen 1 and the auxiliary screens 2 can be matched more freely, for example, one main screen 1 is matched with any number of auxiliary screens 2, the auxiliary screens 2 do not need to be distinguished from left to right, and the types do not need to be distinguished, and one main screen 1 can be matched with a plurality of auxiliary screens 2 with the same specification and spliced at will during sales, so that the intelligent blackboard is more reasonable in compatibility and adaptation.

In another preferred embodiment of the present invention, the smart blackboard further includes an image driver for receiving video data and driving the writing presentation board 22 to present image information corresponding to the video data.

Optionally, an image driver is provided within the sub-screen 2. An image driver is a device that drives an image display.

In one embodiment, the touch device includes an infrared touch bezel surrounding the outline of the writing presentation plate 22, and a touch driver; the infrared touch bezel is used to recognize a touch operation occurring on the writing presentation pad 22, and the touch driver is used to convert the touch operation into a touch signal.

In another embodiment, the touch device includes a capacitive touch film between the writing presentation plate 22 and the cover plate 21, and a touch driver; the capacitive touch film is used to recognize a touch operation occurring on the writing presentation plate 22, and the touch driver is used to convert the touch operation into a touch signal.

In yet another embodiment, the touch device includes an electromagnetic touch film and a touch driver, the electromagnetic touch film is located between the writing presenting plate 22 and the cover plate 21, or the electromagnetic touch film is located on a side of the writing presenting plate 22 facing away from the cover plate 21; the electromagnetic touch film is used to recognize a touch operation occurring on the writing presentation plate 22, and the touch driver is used to convert the touch operation into a touch signal. The electromagnetic touch control film can shield misoperation of fingers, and response time is short.

The auxiliary screen 2 is arranged into a structure of combining a touch device and the writing presentation board 22, and is connected with the main screen 1 through an image driver on the auxiliary screen 2, so that information intercommunication can be realized between the main screen 1 and the auxiliary screen 2, when writing content is touched on a cover plate 21 of the auxiliary screen 2, touch information can be transmitted to the image driver on the auxiliary screen 2, the image driver on the auxiliary screen 2 can control the writing presentation board 22 to present the writing content in real time, the auxiliary screen 2 with the structure can realize local clearing, and a controller of the main screen 1 can acquire the touch information in the image driver of the auxiliary screen 2 and store the touch information in the main screen 1, or the information on the main screen 1 can be transmitted to the auxiliary screen 2 to be displayed locally or wholly on the auxiliary screen 2, so that information intercommunication is realized.

In a preferred embodiment of the present invention, the writing presentation plate 22 is an electro-active display device that is driven by an electrical signal to display image information corresponding to the electrical signal. The display device is lightened in response to a driving current or a driving voltage, and the active display device can receive video data and then display images; the principle of practical display of a passive display device, such as a liquid crystal writing film, is generally referred to in the background art, and the liquid crystal writing film product has no signal or data processing process, and displays what content is what the operator draws.

In one embodiment, writing rendering panel 22 is an electronic ink screen. Optionally, the electronic ink screen is disposed on one side of the cover plate 21, and a touch film is disposed between the electronic ink screen and the cover plate 21, and is adhered to one side of the cover plate 21 close to the electronic ink screen.

Optionally, a plurality of sub-pixels are disposed in the electronic ink screen, each sub-pixel includes two kinds of black and white inks, when the electronic ink screen receives a touch signal of the touch film, the image driver of the sub-screen 2 controls the sub-pixels at the corresponding positions to be in a first state, and the sub-pixels at the rest positions to be in a second state, wherein the first state is that the black ink faces the cover plate 21, the white ink faces away from the cover plate 21, the second state is that the white ink faces the cover plate 21, and the black ink faces away from the cover plate 21.

The electronic ink screen of this embodiment is based on the principle of electrophoresis, and one implementation manner is: the electronic ink comprises two substrates, wherein electronic ink composed of countless tiny transparent particles (sub-pixels) is coated on opposite sides of the two substrates, the sub-pixels are formed by sealing a plurality of black and white particles with positive and negative electricity in a liquid microcapsule, and the charged particles with different colors can move towards different directions due to different applied electric fields, so that black or white effects are displayed on the surface of the electronic ink screen.

The display principle of the electronic ink screen is as follows: in general, all the sub-pixels are in a second state, that is, the white ink faces the cover plate 21, the black ink faces the cover plate 21, the touch film is touched, the touch film recognizes a touch signal, the image driver (driving IC) of the sub-screen 2 controls the touched sub-pixels to generate a state change through the pixel circuit, and the second state is changed into the first state, that is, the black ink faces the cover plate 21, and the white ink faces the cover plate 21, so that display is realized. The black-white color accords with the habit of the traditional blackboard and simultaneously accords with the watching habit of a user.

Optionally, the touch film is an electromagnetic touch film or a capacitive touch film. The electromagnetic touch control film is preferable, the electromagnetic touch control film can effectively shield false touch of fingers, and the touch control response time is shorter.

The intelligent blackboard of this embodiment has the following advantages:

1. By adopting the electronic ink screen for the writing presentation plate 22, light irradiates the sub-pixels of the electronic ink screen through the cover plates 21, light reflection is completed, and compared with the traditional liquid crystal film sub-screen, the electronic ink screen has smaller light loss and can provide higher contrast;

2. The ink in the sub-pixels of the electronic ink screen directly reflects light, and the middle does not need to pass through the liquid crystal layer, so that the problem of deflection angle difference basically does not exist;

3. Because the contrast of the electronic ink screen is higher, the requirement on the light scattering performance of the cover plate 21 is not high, and the flat glass can be used as the cover plate 21 without using frosted glass as the cover plate 21, so that the frosted glass is effectively prevented from scratching the fingers of a user;

4. The electronic ink screen receives touch information through an image driver (driving IC) of the auxiliary screen 2, and uses the experience consistent with that of the main screen 1, so that local erasure can be realized, coarse handwriting can be drawn by using a thin pen, for example, a coarse pen mode is set, input handwriting information is detected, and the image driver of the auxiliary screen 2 changes states of all sub-pixels around handwriting within a preset range, so that fine pen input coarse handwriting is displayed.

Optionally, a backlight module is arranged on the electronic ink screen, and the electronic ink can be used in a cloudy day or other low-brightness environment.

Optionally, in order to reduce manufacturing cost, the auxiliary screen 2 is formed by splicing a plurality of electronic ink screens, specifically, a plurality of electronic ink screens are arranged on one side of the cover plate 21 and spliced into a whole, a touch control film is correspondingly arranged on each electronic ink screen, each electronic ink screen is connected with an image driver of the auxiliary screen 2, and the image drivers of the auxiliary screens 2 are electrically connected with the main screen 1 after being connected in series. Or a plurality of electronic ink screens are spliced to share one touch control film.

In addition, the ink colors of the subpixels of the electronic ink screen are not limited to black ink and white ink, but may be any combination of two ink colors of red, green and blue. The cells responsible for color perception in human eyes can perceive RGB (red, green and blue) three colors, so that one of the three colors is selected as the ground color, and the other color is selected as the character color, thereby improving the contrast of the picture and achieving the effect of clear and easy identification of handwriting.

Under the start-up state of the main screen 1, the display of the auxiliary screen 2 can be controlled by the main screen 1, so that the auxiliary screen is convenient to be in information intercommunication with the main screen 1, for example, the auxiliary screen can be used as the expansion of the display content of the main screen 1 to realize the image splicing of a larger area, and the common use scene is as follows: 1. longer images in the form of picture rolls are displayed, and the auxiliary screen 2 can be spliced with the main screen 1 for display; 2. the teacher gives lessons in a certain hall, the main screen 1 shows a courseware part, the auxiliary screen 2 shows an annotation part, and the auxiliary screen 2 is controlled by the main screen 1, so that courseware of a certain page and corresponding annotations can be formed into associated images, and the associated images are conveniently output to students in a complete and continuous teaching content.

In addition, since the auxiliary screen 2 is provided with an independent image driver, the touch control and the display between the auxiliary screen 2 and the main screen 1 are respectively independent, and the independent use of the auxiliary screen 2 can be ensured.

In this embodiment, two sides of the main screen 1 are respectively provided with one auxiliary screen 2, and the writing presentation plates 22 of the two auxiliary screens 2 are both electronic ink screens.

Or the intelligent blackboard comprises a main screen 1 and a secondary screen 2, wherein the secondary screen 2 is arranged on one side of the main screen 1, and a writing presentation board 22 of the secondary screen 2 is an electronic ink screen.

In another embodiment, writing rendering panel 22 is an organic electroluminescent display screen (i.e., an OLED screen, described below). The organic electroluminescent display screen is a self-luminous screen, a backlight module is not required to be arranged, and the light-taking operation is not required to pass through the liquid crystal layer, so that high contrast can be realized, and the display screen is suitable for being used in a teaching room.

One basic structure of an OLED is a sandwich structure of a thin transparent semiconductor-like Indium Tin Oxide (ITO) connected to a positive electrode of power, plus another metal cathode. The whole structure layer comprises a Hole Transport Layer (HTL), a light Emitting Layer (EL) and an Electron Transport Layer (ETL). When power is supplied to a proper voltage, positive hole and cathode charges are combined in the light-emitting layer to generate light, and red, green and blue RGB three primary colors are generated according to different materials of the light-emitting layer configuration to form basic colors. The OLED has the characteristics of self-luminescence, unlike TFT LCD which needs backlight, so that the OLED has high visibility and brightness, low voltage requirement, high power saving efficiency, quick response, light weight, thin thickness, simple structure, low cost and the like.

The OLED panel of this embodiment preferably uses a metal oxide semiconductor to construct a pixel driving circuit (i.e., a TFT layer, or an array circuit), and compared with a silicon-based semiconductor, the metal oxide semiconductor is suitable for large-size production, and the material is cheaper, so that the OLED panel is suitable for use in a teaching blackboard with low requirements on the fineness of the display screen, and is beneficial to reducing the cost of the product. In addition, the preparation method can adopt printing, printing and other modes, so that pollution is avoided.

The OLED includes a plurality of pixels, and the pixels are composed of a first sub-pixel and a second sub-pixel, and the first sub-pixel and the second sub-pixel are different in color. Preferably, the first subpixel is green and the second subpixel is red. Currently, the commercial OLED products generally consist of single-color pixels, or three-color pixels, or four-color pixels, wherein single-color pixel products are eliminated from the market, and small-size display screens such as single-color dials, dashboards and the like are mainly used in the early stage. The three-color pixels refer to common products such as mobile phone screens, televisions and the like, and as mentioned above, include three-color RGB sub-pixels. Four-color or multi-color pixels are common pixels that add color mixing on an RGB basis, or white light highlighting pixels.

In this embodiment, the OLED screen only includes two sub-pixels, namely red and green, so that the cost of the OLED screen can be effectively reduced, and the OLED screen has more practicability. In addition, 1. Because only two-color pixels are included, the complexity of a pixel circuit is reduced, and the preparation cost is reduced; 2. the two-color pixels can realize high contrast and provide some optional secondary colors, so that the usability of the intelligent blackboard is improved; 3. the luminous life of the blue light material is always an important reason for limiting the display life of the OLED screen, and the service life of the OLED screen can be prolonged by selecting red light and green light.

Preferably, the organic electroluminescent display is an active matrix organic electroluminescent display, i.e. the writing presentation plate 22 is an active OLED display.

In other embodiments, the writing rendering board 22 is an LED screen, and preferably, the writing rendering board 22 is miniLED screens. miniLED screens, namely small-pitch LED screens, are used for shrinking the direct type LED backlight module, and enable the panel color to be very good and the contrast to be very high. For a backlight module of an LCD panel for pen power, miniLED may be used for six to seven thousand LEDs, and is much thinner, which accords with the trend of light weight, thinness and shortness.

In this embodiment, two sides of the main screen 1 are respectively provided with one sub-screen 2, and the writing presentation plates 22 of the two sub-screens 2 are self-luminous screens.

In addition, the writing presentation plate 22 is a liquid crystal display.

In the description herein, it should be understood that the terms "upper," "lower," "right," and the like are used for convenience in description and simplicity of operation only, and are not to be construed as limiting the invention, as the devices or elements referred to must have, be constructed or operated in a particular orientation. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for providing a special meaning.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate technical solution, and this description is provided for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art.

The technical principle of the present invention is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the invention and should not be taken in any way as limiting the scope of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims

1. The intelligent blackboard comprises a main screen and an auxiliary screen arranged on one side of the main screen, and is characterized in that the auxiliary screen comprises a cover plate, a writing presentation plate and a touch device, wherein the touch device is used for identifying touch operation on the writing presentation plate;

The writing presentation plate is spliced into a whole by a plurality of unit presentation plates;

the intelligent blackboard further comprises an image driver, each unit presenting board is connected with an image driver, and the image drivers are used for receiving video data and driving the unit presenting boards to present image information corresponding to the video data.

2. The smart blackboard according to claim 1, wherein the writing presentation board is further configured to respond to the touch operation and present image information corresponding to the touch operation.

3. The intelligent blackboard according to claim 1, wherein the image driver is disposed within the sub-screen.

4. The smart blackboard according to claim 1, wherein the touch device includes an infrared touch bezel surrounding the outline of the writing presentation board, and a touch driver; the infrared touch frame is used for identifying touch operation occurring on the writing display board, and the touch driver is used for converting the touch operation into a touch signal.

5. The smart blackboard according to claim 1, wherein the touch device includes a capacitive touch film between the writing presentation pad and the cover plate, and a touch driver; the capacitive touch film is used for identifying touch operation occurring on the writing presentation plate, and the touch driver is used for converting the touch operation into a touch signal.

6. The smart blackboard according to claim 1, wherein the touch device includes an electromagnetic touch film and a touch driver, the electromagnetic touch film being located between the writing presentation board and the cover board, or the electromagnetic touch film being located on a side of the writing presentation board facing away from the cover board; the electromagnetic touch control film is used for identifying touch control operation occurring on the writing display board, and the touch control driver is used for converting the touch control operation into a touch control signal.

7. The smart blackboard according to claim 1, wherein the writing presentation board is an electro-active display device that is driven by an electric signal to display image information corresponding to the electric signal.

8. The smart blackboard according to claim 7, wherein the writing presentation pad is an electronic ink screen.

9. The smart blackboard according to claim 7, wherein the writing presentation board is an organic electroluminescent display screen.

10. The smart blackboard according to claim 7, wherein the writing presentation board is a liquid crystal display.

11. The smart blackboard according to claim 7, wherein the writing presentation board is an LED screen.

12. The intelligent blackboard according to claim 8, wherein the electronic ink screen is provided with a backlight module.

13. The smart blackboard according to any one of claims 1 to 12, wherein the touch device includes a capacitive touch film between the writing presentation plate and the cover plate, and a touch driver; the capacitive touch control film is used for identifying touch control operation aiming at the writing presentation plate, and the touch control driver is used for converting the touch control operation into a touch control signal;

14. The intelligent blackboard according to claim 8, wherein the electronic ink screen includes a plurality of pixels therein, a first side of the pixels having a first color and a second side of the pixels having a second color, the first color and the second color being different.

15. The smart blackboard according to claim 14, wherein the first color is any one of black, green, red, purple, blue, gray, orange, and the second color is white.

16. The smart blackboard according to claim 9, wherein the organic electroluminescent display is an active matrix organic electroluminescent display.

17. The smart blackboard according to claim 16, wherein the organic electroluminescent display screen includes a plurality of pixels, the pixels being comprised of a first subpixel and a second subpixel, the first subpixel and the second subpixel being different in color.

18. The smart blackboard according to claim 17, wherein the first subpixel is green and the second subpixel is red.

19. The intelligent blackboard according to claim 1, wherein two sides of the main screen are respectively provided with one of the auxiliary screens.

20. The smart blackboard according to any one of claims 1 to 12, wherein the cover plate is ground glass, acrylic plate or flat glass.