39results about How to "Erasure implementation" patented technology

The invention discloses a liquid crystal handwriting board, a handwriting device and a method for controlling the handwriting device, and belongs to the technical field of display. The liquid crystalhandwriting board comprises a liquid crystal panel and a driving assembly. The liquid crystal panel comprises a first substrate, a second substrate, a liquid crystal layer, and a liquid crystal layerlocated between the first substrate and the second substrate, wherein the first substrate and the second substrate are oppositely arranged, . The pixel electrodes in the first substrate in the liquidcrystal panel are the plurality of blocky electrodes, so that when the liquid crystal handwriting board is in the erasing mode, the driving assembly electrically connected with the liquid crystal panel can apply pixel voltage to the blocky pixel electrodes in the to-be-erased area based on the position information of the to-be-erased area; so that a voltage difference is formed between the pixel electrode in the to-be-erased area and the common electrode, liquid crystal molecules in the to-be-erased area in the liquid crystal layer are rearranged under the action of the voltage difference, thelocal area of the liquid crystal handwriting board can be erased, and the use flexibility of the liquid crystal handwriting board is improved.

The invention discloses a liquid crystal handwriting board, a handwriting system and a control method of the handwriting system, and belongs to the technical field of display. The liquid crystal handwriting board comprises a liquid crystal panel, a photosensitive assembly and a driving assembly. When the handwriting displayed on the liquid crystal handwriting board needs to be erased, an erasing tool capable of emitting the target light can be adopted to erase the handwriting. After the erasing tool emits the target light to the liquid crystal panel, the photosensitive assembly can determine the position where the target light irradiates the liquid crystal panel through the target light sensed by at least part of the photosensitive elements, and the position where the target light irradiates the liquid crystal panel is the position of a to-be-erased pixel area. Therefore, the liquid crystal handwriting board can apply the pixel voltage to the pixel electrodes in the to-be-erased pixel area through the control assembly, so that the handwriting in the to-be-erased pixel area is erased.

The invention discloses an intelligent blackboard controlled by a touch panel. The intelligent blackboard comprises a blackboard body, a sliding frame, an eraser seat, an eraser body, a first driving mechanism, a second driving mechanism, a control device and the touch panel, wherein an electronic map is prestored in the control device; the blackboard is divided by a plurality of vertical lines and a plurality of horizontal lines to form a grid in the electronic map; and the touch panel is connected to the control device. When a user continuously moves on the surface of the touch panel in a touching way to form a closed path, the touch panel recognizes the area enclosed by the closed path as a rectangular area, and the control device judges the grid cells in the electronic map, which correspond to the rectangular area, and controls the first driving mechanism and the second driving mechanism to operate till the rectangular area is completely erased by the eraser body. The intelligent blackboard realizes automatic erasing of chalk writing on the blackboard body is realized, convenient degree in use is improved.

The invention discloses a method for generating and controlling local erasing voltage of a liquid crystal writing film. The liquid crystal writing film is located between two conductive layers, and the first conductive layer and the second conductive layer are respectively divided into two or more conductive layers. region, applying A voltage to the conductive region of the first conductive layer covering the partially erased area; applying B voltage to the conductive region of the second conductive layer covering the partially erased area; or, the first conductive layer is divided into two or For more than two conductive areas, the second conductive layer is not divided, and the A voltage is applied to the conductive area of ​​the first conductive layer covering the partial erasing area; the B voltage is applied to the second conductive layer; the present invention can realize local Area erasing, while other areas are not affected by erasing, overcomes the shortcomings of traditional technologies that can only achieve full erasing, improves the user's work efficiency and experience, and improves the commercial value of liquid crystal writing film and its application equipment.

The invention discloses a block polymer capable of being used as white board pen ink dispersing agent and white board pen ink. The block polymer is prepared by a monomer A with m mole and a monomer B with n mole, and molecular weight of the block polymer is 15000-19000, wherein 60%<=m / (m+n)<=95%; the monomer A is an oil-soluble olefin monomer, and the monomer B is a water-soluble or alcohol-soluble chain segment. The white board pen ink is obtained by the following preparation method: dissolving the block polymer in organic solvent, adding pigments or oil-soluble dyes, removing the solvent, and adding water or alcohol solvent to obtain liquid A; dissolving an alcohol- / water-soluble polymer in the water / alcohol solvent, and adding auxiliaries to obtain liquid B; and pouring the liquid B into the liquid A to obtain the white board pen ink. The block polymer enables weak-polar pigments or the oil-soluble dyes to be dispersed in polar solvent stably, thereby achieving stability of the ink. The block polymer enables the pigments or the oil-soluble dyes to be wrapped in a resin system through bridging action, thereby achieving completely non-trace wiping.

A high-brightness liquid crystal writing device, comprising: at least two display material layers, the display material layers comprising cholesteric liquid crystal; at least one intermediate support layer, the intermediate support layer is arranged between every two display material layers; each display material layer Both sides of the layer are respectively provided with an erasing conductive layer, and when at least a part of each erasing conductive layer on both sides of the display material layer is respectively connected to the erasing voltage signal, the connection between the two erasing conductive layers forms between the access parts The electric field, which relatively covers the area of ​​the display material layer where the writing traces are erased. Therefore, the present invention retains the solution of the double-layer display material layer in the prior art (but the present invention is not limited to the double-layer), by disposing two erasing conductive layers on both sides of each display material layer respectively , to independently erase the display material layer to solve the problem of excessive erasing voltage, and at the same time, the incident light can be double-reflected by two or more display material layers to achieve the effect of enhancing brightness.

The invention relates to a handwriting processing method, display equipment and a readable storage medium, and relates to the technical field of display. The handwriting processing method comprises the following steps: sequentially generating path points for forming handwriting according to a writing operation; when the number of the newly-added path points reaches a specified number, establishing a sub-bounding box covering the newly-added path points with the specified number; when the writing operation is finished, a main bounding box covering all the path points of the handwriting is established, and the sub-bounding box is located in the main bounding box; generating at least one erasure unit comprising a plurality of erasure areas according to the erasure operation, and establishing an erasure bounding box of the erasure unit; each erasing bounding box is established, a positioning step is executed for each handwriting, and the positioning step comprises the steps that according to a main bounding box intersecting with the erasing bounding box, a sub-bounding box intersecting with the erasing bounding box is selected; according to a sub-bounding box intersected with the erasure bounding box, selecting a path point in the erasure area as a path point to be erased; and erasing the path points to be erased in the handwriting.

The invention provides an image processing method. The image processing method includes: intercepting to obtain operation triggering erasure of an image to be processed; acquiring a color value of a corresponding position of the operation to server as a target color value; controlling calculation of the target color value in the image to be processed through preset color calculation factors to obtain a mixed color value; updating the target color value in the image to be processed to be the mixed color value. Additionally, the invention further provides an image processing device matched with the image processing method. By the aid of the image processing method and the image processing device, complicated patterns can be erased.

The invention discloses an erasing mechanism of a visual card erasing machine. The erasing mechanism comprises an upper framework and a lower framework, wherein one ends of the upper and the lower frameworks are hinged, and the other ends of the upper and the lower frameworks are in detachable connection; one end of the lower framework is provided with a card inlet, and the lower framework is equipped with a motor, a control circuit board and a plurality of driving rollers; the rotary shaft of the motor is in driving connection with the driving rollers; the other end of the lower framework is provided with a card outlet; a plurality of heating rollers in one-to-one correspondence with the driving rollers are arranged on the upper framework, and the two ends of each heating roller are rotationally connected with the two side walls of the upper framework; when the upper framework and the lower framework are close, the outer side wall of each heating roller tightly presses and is jointed with the outer side of one corresponding driving roller, and each heating roller is externally equipped with a heating body; the two ends of the heating body are fixedly connected with the outer side wall of the upper framework; and the heating body is connected with the control circuit board via a wire. The erasing machine of the visual card erasing machine is small in damage to the card surface, fast in erasing speed and high in erasing efficiency.

The invention discloses an automatic blackboard device which comprises a blackboard body, a sliding frame, an eraser seat, an eraser body, a collecting tank, a first driving mechanism, a second driving mechanism and a control device, wherein the sliding frame comprises a pair of horizontally arranged first guide rails and a vertically arranged second guide rail; the eraser body is arranged on the eraser seat; the collecting trough is connected with the lower side part of the eraser seat; an opening of the collecting trough faces the eraser body; the collecting trough comprises a main body made of rigid plastic and a front side wall made of rubber; when the eraser body maintains contact with the blackboard body, the front side wall is closely contacted with the blackboard body; the control device controls the first driving mechanism and the second driving mechanism to alternately work; and in each work cycle, the first driving mechanism drives the second guide rail to move a preset distance along the first guide rails first, and then the second driving mechanism drives the eraser seat to move from one end of the second guide rail to the other end of the second guide rail. The automatic blackboard device realizes automatic erasing of chalk writing on the blackboard body.

The invention relates to a traceless education method suitable for an embedded education terminal, a cycle is formed, a student logs in teaching software of the education terminal each time, and the education terminal requests latest education resource information from a server side and displays the latest education resource information on the education terminal in real time. In the aspect of erasing the use data of the education terminal, when the education terminal is shut down, one-key restoration of the education terminal is started, the system data of the education terminal is re-programmed, erasing of the user data is achieved, and data retention and invasion of malicious applications are avoided; in the aspect of providing latest education information for students, an information receiving program is installed in an education terminal, meanwhile, an education information publishing server is built, the students only need to click on the receiving program of the education terminal, the server automatically pushes the education information published by teachers to the education terminal, and therefore real-time updating of the education information is achieved.

An erasing method and device suitable for a multi-carrier frequency domain modulation signal relate to the field of multi-carrier frequency domain modulation in an optical communication system, and comprise the following steps: separating a part of signals from a transmission link of a multi-carrier frequency domain signal to perform data sampling, and performing FFT on a sampled digital signal to obtain an FFT signal; de-mapping and recovering the loaded signal according to the corresponding relationship of the frequency spectrum positions; selecting a frequency point needing clock recovery, evaluating phase drift through the phase difference of the frequency point after two adjacent FFT, and adjusting the frequency of a local reference clock by taking the average value of multiple adjacent phase drift results; and when the adjusted reference clock is synchronous with the sending end clock, generating a subcarrier signal with the same strength and opposite phases at a frequency point where subcarriers need to be erased, carrying out IFFT, and superposing an obtained result with a multi-carrier frequency domain signal of a transmission link. According to the invention, the modification of the optical label data from 1 to 0 is realized, so that the multi-carrier frequency domain modulation signal can be flexibly modified as required.

The invention provides a method for generating a multi-level vector diagram. The method comprises the steps of: determining a boundary contour of a color filling area of an image; storing the boundary contour and an image attribute of the color filling area, wherein the image attribute is used for determining pixels in the boundary contour. By adopting the method, the pixels within the contour range can be reduced via the contour of the color filling area, so that the effect of modifying the pixels is achieved and the image can be modified more accurately; and because the pixels can be directly operated, processing of complex topological structures can be supported.

The invention discloses an air-bag self-adapting automatic-erasing device and method for a low temperature filling system. The device comprises a mounting seat (8), the two sides of the mounting seat are provided with a rotating shaft (4) and a power device respectively, and the rotating shaft is fixedly provided with a bracket (3); an air bag (2) is laid on the rotating shaft and bracket, and the rotating shaft is provided with an air inlet (41) and first and second air outlets (42, 43); the air inlet is communicated with the first and second air outlets, and the first and second air outlets are communicated with the air bag and the outside respectively. The method includes the following steps that the rotating shaft extends into the inner cavity of the low temperature filling system, and the air is inlet from the air inlet to make the air bay expand; the rotating shaft is driven, plastic wires are used to wipe frost and ice down, and the air is compressed to blow the frost and ice down; the pressure of supplying air is adjusted until erasing is completed. The purpose is to provide the air-bag self-adapting automatic-erasing device and method for the low temperature filling system, and the device and the method have the advantages of being high in erasing efficiency, good in effect, strong in universality, high in automation degree, safe in use and the like.

The invention discloses a time-limited efficient method for erasing ranked data in an integrated avionics system, and provides a layered architecture to erase the data of the integrated avionics system, wherein the upper layer thereof is the ranked data erasing decision, which decides a sub-algorithm for erasing data in a file by adopting a 'mean correspondence diffusion method' and combining thefile properties, such as security level, size, encryption, etc., as well as the system allowable erasing time. The lower layer is the ranked data erasing algorithm, which comprises a main erasing algorithm and an erasing algorithm set composed of erasing sub-algorithms, wherein, the main erasing algorithm is used for balancing the security and the timeliness of the file erasing by designing a 'skipping' method; the erasing sub-algorithms in the erasing algorithm set are generated and configured according to different parameters by the main erasing algorithm, and used for being called by the erasing decision, so as to erase the files at different security levels. The method for erasing the ranked data has the characteristics of limited time, high efficiency, safety and flexibility. Therefore, the method is suitable for the integrated airborne avionics system of the next-generation.