CN116424008A - Method, device, equipment and medium for preparing uniform touch screen based on dot matrix printing - Google Patents
Method, device, equipment and medium for preparing uniform touch screen based on dot matrix printing Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
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- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a method, a device, equipment and a medium for preparing a uniform touch screen based on dot matrix printing, wherein the method comprises the steps of obtaining the screen size of the touch screen to be prepared; generating a corresponding initial image according to the screen size; acquiring a gray level image of the initial image, and processing the gray level image by adopting a halftone algorithm to produce a uniform initial pixel lattice; uniformly distributing the determined number of sensing points into the initial pixel lattice to obtain a printed pixel lattice; and printing according to the printing pixel dot matrix to obtain the touch screen. The touch screen is simple in preparation method and environment-friendly.
Description
The application is a divisional application of patent application of invention number 202010144043.2, which is filed 3/4/2020 and has the name of a printing preparation method, a device, equipment and a medium of a uniform touch screen.
Technical Field
The invention relates to the technical field of touch screen preparation, in particular to a method, a device, equipment and a medium for preparing a uniform touch screen based on dot matrix printing.
Background
Inkjet printing technology refers to technology in which ink droplets are ejected through a head onto a printing medium to obtain an image or text. The technology is non-contact printing, has the technical advantages of high printing speed, small pollution, bright image color, long image retention period, suitability for various printing media and the like, and is widely applied to the fields of advertisement manufacture, office cultural goods, decoration, printing and the like.
In recent years, touch display technology is rapidly developed, touch products occupy more and more important positions in life of people, such as intelligent household appliance touch display panels, touch screens and the like, one core component supporting the touch products is a touch display panel (also called a touch pad or a touch screen), the traditional manufacturing process of the touch pad comprises deposition, chemical corrosion, electrostatic adsorption and the like, the traditional manufacturing process has the problems of low productivity, heavy pollution, low raw material utilization rate and the like, and the problems of uneven distribution of sensing points can occur, so that the functions of accuracy, sensitivity and the like in touch operation on the touch pad are seriously influenced.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a medium for preparing a uniform touch screen based on dot matrix printing, which are used for solving the technical problem of uneven distribution of an induction dot matrix when the touch screen is prepared in the prior art.
In a first aspect, an embodiment of the present invention provides a method for preparing a uniform touch screen based on dot matrix printing, where the method includes:
acquiring the screen size of the touch screen to be prepared;
generating a corresponding initial image according to the screen size;
acquiring a gray level image of the initial image, and processing the gray level image by adopting a halftone algorithm to produce a uniform initial pixel lattice;
uniformly distributing the determined number of sensing points into the initial pixel dot matrix to obtain a printing pixel dot matrix which contains the sensing points and can be identified by printing equipment;
and performing ink-jet printing according to the printing pixel dot matrix to obtain the touch screen.
Preferably, the halftone algorithm includes: any one of a dithering method, an error diffusion method and an optimal iteration method.
Preferably, when the halftone algorithm is an error diffusion method, the processing the gray image by using the halftone algorithm to generate a uniform initial pixel lattice includes:
acquiring an initial concentration value of each pixel point in the gray level image;
comparing the initial concentration value of each pixel point with an error threshold value to obtain an error diffusion value of each pixel point;
and distributing the error diffusion value of each pixel point to the adjacent unprocessed pixel points by the progressive processing to obtain an initial pixel lattice.
Preferably, the comparing the initial concentration value of each pixel with the error threshold value to obtain an error diffusion value of each pixel includes:
comparing the initial concentration value of each pixel point with an error threshold value to obtain a correction concentration value to be corrected of each pixel point;
according to the concentration value of each pixel point and the correction concentration value, an error diffusion value is obtained;
wherein, let the initial density value of each pixel point be x (i, j), and the error threshold value be T, the corrected density value y (i, j) is:
the error diffusion value h (i, j) is:
h(i，j)＝x(i,j)-y(i,j)；
preferably, the step of assigning the error diffusion value of each pixel to the adjacent unprocessed pixel to obtain the initial pixel lattice by using the progressive processing includes:
assuming that the coordinate value of the pixel point currently processed is (i, j), the pixel point allocated with the error diffusion value of the pixel point (i, j) is (i, j+1), (i+1, j-1), (i+1, j+1), and the error diffusion value allocation method includes:
x(i,j+1)＝x(i,j+1)+A*h(i,j)
x(i+1,j-1)＝x(i+1,j-1)+B*h(i,j)
x(i+1,j)＝x(i+1,j)+C*h(i,j)
x(i+1,j+1)＝x(i+1,j+1)+D*h(i,j)
wherein A, B, C, D is the error diffusion coefficient and a+b+c+d=1.
Preferably, the performing inkjet printing according to the printed pixel dot matrix to obtain the touch screen includes:
determining a printing mode and a printing speed according to the printing pixel dot matrix;
and controlling the ink-jet printing equipment to jet corresponding ink in the sub-pixel square of the substrate according to the printing pixel lattice according to the printing mode and the printing speed to obtain the touch screen.
Preferably, the touch screen includes: the touch screen comprises a surface hard coating, two ITO ceramic layers, a bottom circuit layer, a glass bottom layer and induction points, wherein the surface hard coating is positioned on the outermost layer and contacted with a touch object, the two ITO ceramic layers are positioned between the surface hard coating and the bottom circuit layer, and the induction points are positioned between the two ITO ceramic layers.
In a second aspect, an embodiment of the present invention provides an apparatus for preparing a uniform touch screen based on dot matrix printing, where the apparatus includes:
the screen size acquisition module is used for acquiring the screen size of the touch screen to be prepared;
the initial image acquisition module is used for generating a corresponding initial image according to the screen size;
the initial pixel lattice acquisition module is used for acquiring a gray image of the initial image, and processing the gray image by adopting a halftone algorithm to produce a uniform initial pixel lattice;
the printing pixel lattice acquisition module is used for uniformly distributing the determined number of sensing points into the initial pixel lattice to obtain a printing pixel lattice which contains the sensing points and can be identified by printing equipment;
and the printing module is used for performing ink-jet printing according to the printing pixel dot matrix to obtain the touch screen.
In a third aspect, an embodiment of the present invention provides an apparatus for preparing a uniform touch screen based on dot-matrix printing, including: at least one processor, at least one memory and computer program instructions stored in the memory, which when executed by the processor, implement the method as in the first aspect of the embodiments described above.
In a fourth aspect, embodiments of the present invention provide a medium having stored thereon computer program instructions which, when executed by a processor, implement a method as in the first aspect of the embodiments described above.
In summary, according to the method, the device, the equipment and the medium for preparing the uniform touch screen based on dot matrix printing provided by the embodiment of the invention, the initial image to be printed is initially generated by acquiring the size of the touch screen, then the gray image of the initial image is acquired, the gray image is processed by adopting a halftone algorithm to produce a uniform initial pixel dot matrix, the determined sensing points are randomly and uniformly distributed in the uniform initial pixel dot matrix to obtain a final printed pixel dot matrix, and the uniform touch screen can be obtained by printing according to the printed pixel dot matrix.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are needed to be used in the embodiments of the present invention will be briefly described, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a print preparation method of a uniform touch screen according to a first embodiment of the present invention.
Fig. 2 is a schematic view of a sub-pixel grid of a method for manufacturing a uniform touch screen according to a first embodiment of the present invention.
Fig. 3 is an initial image schematic diagram of a print preparation method of a uniform touch screen according to a first embodiment of the present invention.
Fig. 4 is a flowchart of a print preparation method of a uniform touch screen according to a second embodiment of the present invention.
Fig. 5 is a schematic view of display pixels of a print preparation method of a uniform touch screen according to a second embodiment of the present invention.
Fig. 6 is a flowchart of a print preparation method of a uniform touch screen according to a third embodiment of the present invention.
Fig. 7 is a flowchart of a print preparation method of a uniform touch screen according to a fourth embodiment of the present invention.
Fig. 8 is an error diffusion schematic diagram of a print preparation method of a uniform touch screen according to a fourth embodiment of the present invention.
Fig. 9 is a schematic view of a touch screen structure of a printing preparation method of a uniform touch screen according to a fifth embodiment of the invention.
Fig. 10 is a schematic structural view of a print preparing apparatus of a uniform touch screen according to a sixth embodiment of the present invention.
Fig. 11 is a schematic structural view of a print preparing apparatus for a uniform touch screen according to a seventh embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
Referring to fig. 1, an embodiment of the present invention provides a print preparation method for a uniform touch screen, which mainly includes the following steps:
s1, acquiring the screen size of the touch screen to be prepared;
s2, generating a corresponding initial image according to the screen size;
specifically, the touch screen includes a plurality of pixel points arranged in an array manner, each pixel further includes red, green and blue 3-color sub-pixel grids, and ink of a corresponding color is printed into the corresponding sub-pixel grid to form the touch screen with required resolution. Referring to fig. 2, in the present embodiment, the sub-pixel square is in a rounded rectangular shape, and the size and number of the pixel square are determined by the application characteristics of the touch screen, wherein for a High Definition Television (HDTV), the size of each sub-pixel square is 140 μm and 250 μm under the specification that the pixel array is 1080×1920 and the size is 94-165 cm; for mobile devices such as smartphones, the pixels are wide video image arrays (WVGA), and the sizes of the sub-pixel squares are 26 μm and 35 μm respectively under the specifications that the pixel arrays are 480×800 and the sizes are 7.37-9.65 cm. Determining a pixel array to be printed according to the application characteristics of a screen, determining a sub-pixel grid size according to the screen size, determining the size of ink drops printed in the sub-pixel grid according to the sub-pixel grid size and the pixel array, and generating a corresponding initial image according to the pixel array and the ink drop size. Fig. 3 is a generated pixel lattice of 100×100, and the initial image is uneven, which will result in inaccurate and insensitive touch control when the sensing point is set in the initial image, so that the user experience effect of the product is poor.
S3, processing the initial image to generate a uniform initial pixel lattice;
referring to fig. 4, in this embodiment, the step S3 specifically includes:
s311, calculating a point density value of each pixel point in the initial image;
s312, comparing the point density values of all the pixel points to obtain a first maximum point density value and a first minimum point density value;
s313, determining a first pixel point corresponding to the first maximum point density value in the initial image and a second pixel point corresponding to the first minimum point density value in the initial image;
s314, exchanging the dot density values of the first pixel dot and the second pixel dot to obtain an intermediate pixel dot matrix;
and (S311) to S314 are cycled until the N maximum point density value is greater than or equal to the N-1 maximum point density value and the N minimum point density value is less than or equal to the N-1 minimum point density value, stopping obtaining the initial pixel lattice, wherein N is more than 0, and N is an integer.
Specifically, calculating the Density value Density (x, y) of each pixel point in the initial image by using a Density formula, and comparing the Density values (x, y) of all the pixel points to obtain a maximum Density value Density (x, y) | Max And a minimum point Density value Density (x, y) | Min Obtaining the maximum Density value Density (x, y) | Max The position of the corresponding pixel point in the initial image and the minimum point Density value Density (x, y) | Min The position of the corresponding pixel point in the initial image, and the maximum point density value D is calculated according to the positionensity(x,y)| Max The Density value of the corresponding pixel is adjusted to be Density (x, y) | Min The minimum point Density value Density (x, y) | Min The Density value of the corresponding pixel is adjusted to be Density (x, y) | Max The pixel points around the pixel points corresponding to the maximum point density value in the initial image are diluted after the adjustment, and the pixel points around the pixel points corresponding to the minimum point density value in the initial image are gathered, so that the obtained intermediate pixel dot matrix is more uniform relative to the initial image; and (3) recalculating the point density value of each pixel point in the intermediate pixel dot matrix according to the same method, obtaining the maximum point density value and the minimum point density value in the intermediate pixel dot matrix, exchanging the maximum point density value and the minimum point density value of the pixel points according to the exchanging method in the initial image to obtain the pixel dot matrix with better uniformity again, and repeating the steps S311 to S314 according to the method until the N maximum point density value is greater than or equal to the N-1 maximum point density value and the N minimum point density value is less than or equal to the N-1 minimum point density value, and stopping to finally obtain the uniform initial pixel dot matrix shown in the figure 5.
Preferably, in this embodiment, the point density formula is:
where f denotes a weighting coefficient, R denotes a square side length centered on (x, y), width denotes a screen Width, height denotes a screen length,
in another embodiment, the initial image is a gray scale image with a density generated by image software, such as PS (photoshop) software, to generate a gray scale image with a density of 30% and a size equal to the size of the screen. And then processing the initial image by adopting a halftone algorithm to generate a uniform initial pixel lattice, wherein the halftone algorithm comprises the following steps: one of a dithering method, an error diffusion method and an optimal iteration method. The dithering method, the error diffusion method and the optimal iteration method are all classical halftone algorithms, the dithering method utilizes a digital mode to simulate a contact screening process in the inkjet printing industry, and each pixel unit in a generated halftone image only depends on the tone of a pixel; calculating a plurality of pixels in the neighborhood of the pixel to be processed in the continuous tone image by using an error diffusion method so as to obtain a pixel value of the halftone image; the optimal iterative method requires multiple comparison calculations to obtain an optimal halftone image.
Referring to fig. 6, when the initial image is processed by using an error diffusion method to generate a uniform initial pixel lattice, the step S3 specifically includes:
s321, acquiring an initial concentration value of each pixel point in the initial image;
s322, comparing the initial concentration value of each pixel point with an error threshold value to obtain an error diffusion value of each pixel point;
s323, distributing the error diffusion value of each pixel point to the adjacent unprocessed pixel points by processing line by line to obtain an initial pixel lattice.
Referring to fig. 7, the step S322 specifically includes:
s3221, comparing the initial concentration value of each pixel point with an error threshold value to obtain a correction concentration value to be corrected of each pixel point;
s3222, according to the initial concentration value and the correction concentration value of each pixel point, an error diffusion value is obtained;
wherein, let the initial density value of each pixel point be x (i, j), and the error threshold value be T, the corrected density value y (i, j) is:
the error diffusion value h (i, j) is:
h(i，j)＝x(i,j)-y(i,j)。
specifically, if the initial image is a gray scale image of 100×100, the density range is 0% -100%, each pixel corresponds to an initial density value, and the error threshold is set to be T, then the corrected density value of the pixel is 100% when the initial density value of the pixel is greater than the error threshold T, and the corrected density value of the pixel is 0 when the density value of the pixel is less than or equal to the error threshold T, according to the formula: h (i, j) =x (i, j) -y (i, j) is calculated to obtain an error diffusion value h (i, j) of each pixel point, all the pixel points are traversed according to the sequence from left to right and from top to bottom, as shown in fig. 8, the error diffusion value of each pixel point is distributed to 4 adjacent unprocessed pixel points according to weight proportion, if the coordinate value of the current processed pixel point is (i, j), the pixel point to which the error diffusion value of the pixel point (i, j) is distributed is (i, j+1), (i+1, j-1), (i+1, j+1), and the error diffusion value distribution method comprises:
x(i,j+1)＝x(i,j+1)+A*h(i,j)
x(i+1,j-1)＝x(i+1,j-1)+B*h(i,j)
x(i+1,j)＝x(i+1,j)+C*h(i,j)
x(i+1,j+1)＝x(i+1,j+1)+D*h(i,j)
wherein A, B, C, D is the error diffusion coefficient and a+b+c+d=1.
S4, uniformly distributing the determined number of sensing points into the initial pixel dot matrix to obtain a printing pixel dot matrix which contains the sensing points and can be identified by printing equipment;
fig. 9 is a schematic structural diagram of a touch screen, including: the touch screen comprises a surface hard coating, two ITO ceramic layers, a bottom circuit layer, a glass bottom layer and sensing points, wherein the surface hard coating is positioned between the outermost layer and a touch object, the two ITO ceramic layers are positioned between the surface hard coating and the bottom circuit layer, the glass bottom layer is positioned between the largest layer and the bottom circuit layer, the sensing points are positioned between the two ITO ceramic layers, when a mobile phone contacts the surface of the touch screen, the screen of the touch screen can form a very tiny round groove to press the sensing points, the controller judges the ink positions according to the positions of the sensing points, and when the number of the sensing points is determined, the sensing points are uniformly distributed in a uniform initial pixel lattice to obtain a printed pixel lattice, so that the problems of inaccurate touch control, insensitive touch and the like caused by uneven dispersion of the sensing points are avoided.
And S5, performing ink-jet printing according to the printing pixel dot matrix to obtain the touch screen.
Specifically, the printing mode and the printing speed are determined according to the printing pixel dot matrix. The printing mode comprises the following steps: the method mainly comprises reciprocating scanning printing, disposable scanning printing, multi-nozzle side-by-side scanning printing and the like, wherein the reciprocating scanning printing is also called multi-pass scanning printing, the multi-pass scanning printing means that each unit of an image to be printed can be printed only by performing interpolation for a plurality of times, each unit consists of a plurality of pixel points, if 2-pass scanning printing, each unit consists of 2 pixel points, and if 3-pass scanning printing, each unit consists of 3 pixel points; the one-time scanning printing is also called as single pass scanning printing, and the single pass scanning printing means that each unit of an image to be printed can be printed by only one scanning; the multi-nozzle side-by-side scanning printing is also called Onepass scanning printing, and the Onepass scanning printing refers to one-time printing completion of an image to be printed. When the functional film of the touch screen is printed by ink jet, the requirements of uniformity and thickness of the film can be met by the high precision of the liquid drop distance (mu m) and the liquid drop volume (pl), and the tiny changes of the liquid drop positioning or the liquid volume can possibly cause uneven luminous brightness of a pixel grid of the touch screen or even complete non-luminous short circuit of the pixel grid, so that a large number of defects appear in the touch screen, the functional layer not only needs to be uniform in film thickness, but also needs to keep the photoelectric property of the functional layer, and therefore, the solvent needs to be dried and removed in the film forming process; also, other additives in the ink must be removed to a minimum level so as not to affect the performance of the organic semiconductor thin film. Therefore, in order to ensure good film forming property of printing, it is necessary to set an appropriate printing speed. And after the printing mode and the printing speed are determined, controlling the ink-jet printing equipment to jet corresponding ink in the sub-pixel square of the substrate according to the printing pixel lattice, so as to obtain the final touch screen.
Referring to fig. 10, an embodiment of the present invention provides a print preparation apparatus for a uniform touch screen, the apparatus including:
a screen size obtaining module 10, configured to obtain a screen size of the touch screen to be prepared;
an initial image acquisition module 20, configured to generate a corresponding initial image according to the screen size;
an initial pixel lattice acquisition module 30, configured to process the initial image to generate a uniform initial pixel lattice;
a print pixel lattice acquisition module 40, configured to uniformly distribute the determined number of sensing points into the initial pixel lattice to obtain a print pixel lattice that includes sensing points and is identifiable by the printing device;
the printing module 50 is configured to perform inkjet printing according to the printed pixel dot matrix to obtain the touch screen.
Preferably, the initial image is a dot matrix image, and the initial pixel dot matrix acquiring module 30 includes:
a point density value acquisition unit for calculating a point density value of each pixel point in the initial image;
the comparison unit is used for comparing the point density values of all the pixel points to obtain a first maximum point density value and a first minimum point density value;
the image point position determining unit is used for determining a first pixel point corresponding to the first maximum point density value in the initial image and a second pixel point corresponding to the first minimum point density value in the initial image;
and the exchange unit is used for exchanging the dot density values of the first pixel dot and the second pixel dot to obtain an intermediate pixel dot matrix.
Preferably, the calculating the point density value of each pixel point in the initial image includes:
the position of each pixel point in the initial image is set as (x, y), and the Density value Density (x, y) of each pixel point is set as:
where f denotes a weighting coefficient, R denotes a square side length centered on (x, y), width denotes a screen Width, height denotes a screen length,
preferably, the initial pixel lattice acquisition module 30 further includes:
and the halftone processing unit is used for processing the initial image by adopting a halftone algorithm to generate a uniform initial pixel lattice.
Preferably, the processing the initial image to generate a uniform initial pixel lattice includes:
processing the initial image by adopting a halftone algorithm to generate a uniform initial pixel lattice;
wherein the halftone algorithm comprises: one of a dithering method, an error diffusion method and an optimal iteration method.
Preferably, the halftone processing unit is further configured to obtain an initial density value of each pixel point in the initial image; comparing the initial concentration value of each pixel point with an error threshold value to obtain an error diffusion value of each pixel point; and distributing the error diffusion value of each pixel point to the adjacent unprocessed pixel points by the progressive processing to obtain an initial pixel lattice.
Preferably, the comparing the initial concentration value of each pixel with the error threshold value to obtain an error diffusion value of each pixel includes:
comparing the initial concentration value of each pixel point with an error threshold value to obtain a correction concentration value to be corrected of each pixel point;
according to the concentration value of each pixel point and the correction concentration value, an error diffusion value is obtained;
wherein, let the initial density value of each pixel point be x (i, j), and the error threshold value be T, the corrected density value y (i, j) is:
the error diffusion value h (i, j) is:
h(i，j)＝x(i,j)-y(i,j)；
preferably, the step of assigning the error diffusion value of each pixel to the adjacent unprocessed pixel to obtain the initial pixel lattice by using the progressive processing includes:
assuming that the coordinate value of the pixel point currently processed is (i, j), the pixel point allocated with the error diffusion value of the pixel point (i, j) is (i, j+1), (i+1, j-1), (i+1, j+1), and the error diffusion value allocation method includes:
x(i,j+1)＝x(i,j+1)+A*h(i,j)
x(i+1,j-1)＝x(i+1,j-1)+B*h(i,j)
x(i+1,j)＝x(i+1,j)+C*h(i,j)
x(i+1,j+1)＝x(i+1,j+1)+D*h(i,j)
wherein A, B, C, D is the error diffusion coefficient and a+b+c+d=1.
In addition, the print preparation method of the uniform touch screen according to the embodiment of the present invention described in connection with fig. 1 may be implemented by a print preparation apparatus of the uniform touch screen. Fig. 11 shows a schematic hardware structure of a print preparation apparatus for a uniform touch screen according to an embodiment of the present invention.
The print preparation apparatus of the uniform touch screen may comprise a processor 401 and a memory 402 storing computer program instructions.
In particular, the processor 401 described above may include a Central Processing Unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured as one or more integrated circuits implementing embodiments of the present invention.
The processor 401 reads and executes the computer program instructions stored in the memory 402 to implement the print preparation method of the uniform touch screen according to any one of the above embodiments.
In one example, the print preparation apparatus of the uniform touch screen may further include a communication interface 403 and a bus 410. As shown in fig. 11, the processor 401, the memory 402, and the communication interface 403 are connected to each other by a bus 410 and perform communication with each other.
The communication interface 403 is mainly used to implement communication between each module, device, unit and/or apparatus in the embodiment of the present invention.
In addition, in combination with the method for preparing the uniform touch screen in the above embodiment, the embodiment of the invention can be implemented by providing a computer readable storage medium. The computer readable storage medium has stored thereon computer program instructions; the computer program instructions, when executed by the processor, implement a print preparation method for a uniform touch screen in any of the above embodiments.
In summary, according to the method, the device, the equipment and the medium for preparing the uniform touch screen by printing, the initial image to be printed is initially generated by acquiring the size of the touch screen, then the initial image is uniformly processed to obtain a uniform initial pixel lattice, the determined sensing points are randomly and uniformly distributed in the uniform initial pixel lattice to obtain a final printed pixel lattice, and the uniform touch screen can be obtained by printing according to the printed pixel lattice.
It should be understood that the invention is not limited to the particular arrangements and instrumentality described above and shown in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between steps, after appreciating the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented in hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine readable medium or transmitted over transmission media or communication links by a data signal carried in a carrier wave. A "machine-readable medium" may include any medium that can store or transfer information. Examples of machine-readable media include electronic circuitry, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio Frequency (RF) links, and the like. The code segments may be downloaded via computer networks such as the internet, intranets, etc.
It should also be noted that the exemplary embodiments mentioned in this disclosure describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.
In the foregoing, only the specific embodiments of the present invention are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present invention is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and they should be included in the scope of the present invention.
Claims (10)
1. A method for preparing a uniform touch screen based on dot matrix printing, the method comprising:
acquiring the screen size of the touch screen to be prepared;
generating a corresponding initial image according to the screen size;
acquiring a gray level image of the initial image, and processing the gray level image by adopting a halftone algorithm to produce a uniform initial pixel lattice;
uniformly distributing the determined number of sensing points into the initial pixel dot matrix to obtain a printing pixel dot matrix which contains the sensing points and can be identified by printing equipment;
and performing ink-jet printing according to the printing pixel dot matrix to obtain the touch screen.
2. The method for manufacturing a uniform touch screen based on dot matrix printing according to claim 1, wherein the halftone algorithm comprises: any one of a dithering method, an error diffusion method and an optimal iteration method.
3. The method for preparing a uniform touch screen based on dot matrix printing according to claim 2, wherein when the halftone algorithm is an error diffusion method, the processing the gray image using the halftone algorithm to produce a uniform initial pixel dot matrix comprises:
acquiring an initial concentration value of each pixel point in the gray level image;
comparing the initial concentration value of each pixel point with an error threshold value to obtain an error diffusion value of each pixel point;
and distributing the error diffusion value of each pixel point to the adjacent unprocessed pixel points by the progressive processing to obtain an initial pixel lattice.
4. The method for manufacturing a uniform touch screen based on dot matrix printing according to claim 3, wherein said comparing the initial concentration value of each pixel with an error threshold value to obtain an error diffusion value of each pixel comprises:
comparing the initial concentration value of each pixel point with an error threshold value to obtain a correction concentration value to be corrected of each pixel point;
according to the concentration value of each pixel point and the correction concentration value, an error diffusion value is obtained;
wherein, let the initial density value of each pixel point be x (i, j), and the error threshold value be T, the corrected density value y (i, j) is:
the error diffusion value h (i, j) is:
h(i，j)＝x(i,j)-y(i,j)。
5. the method for preparing a uniform touch screen based on dot matrix printing according to claim 4, wherein the step of assigning the error diffusion value of each pixel to the adjacent unprocessed pixel to obtain the initial pixel dot matrix by the row-by-row processing comprises:
assuming that the coordinate value of the pixel point currently processed is (i, j), the pixel point allocated with the error diffusion value of the pixel point (i, j) is (i, j+1), (i+1, j-1), (i+1, j+1), and the error diffusion value allocation method includes:
x(i,j+1)＝x(i,j+1)+A*h(i,j)
x(i+1,j-1)＝x(i+1,j-1)+B*h(i,j)
x(i+1,j)＝x(i+1,j)+C*h(i,j)
x(i+1,j+1)＝x(i+1,j+1)+D*h(i,j)
wherein A, B, C, D is the error diffusion coefficient and a+b+c+d=1.
6. The method for preparing a uniform touch screen based on dot matrix printing according to any one of claims 1 to 5, wherein the performing inkjet printing according to the printed pixel dot matrix to obtain the touch screen comprises:
determining a printing mode and a printing speed according to the printing pixel dot matrix;
and controlling the ink-jet printing equipment to jet corresponding ink in the sub-pixel square of the substrate according to the printing pixel lattice according to the printing mode and the printing speed to obtain the touch screen.
7. The method for preparing a uniform touch screen based on dot matrix printing according to claim 6, wherein the touch screen comprises: the touch screen comprises a surface hard coating, two ITO ceramic layers, a bottom circuit layer, a glass bottom layer and induction points, wherein the surface hard coating is positioned on the outermost layer and contacted with a touch object, the two ITO ceramic layers are positioned between the surface hard coating and the bottom circuit layer, and the induction points are positioned between the two ITO ceramic layers.
8. A device for preparing a uniform touch screen based on dot matrix printing, the device comprising:
the screen size acquisition module is used for acquiring the screen size of the touch screen to be prepared;
the initial image acquisition module is used for generating a corresponding initial image according to the screen size;
the initial pixel lattice acquisition module is used for acquiring a gray image of the initial image, and processing the gray image by adopting a halftone algorithm to produce a uniform initial pixel lattice;
the printing pixel lattice acquisition module is used for uniformly distributing the determined number of sensing points into the initial pixel lattice to obtain a printing pixel lattice which contains the sensing points and can be identified by printing equipment;
and the printing module is used for performing ink-jet printing according to the printing pixel dot matrix to obtain the touch screen.
9. An apparatus for preparing a uniform touch screen based on dot matrix printing, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, which when executed by the processor, implement the method of any one of claims 1-7.
10. A medium having stored thereon computer program instructions, which when executed by a processor, implement the method of any of claims 1-7.
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| CN103402042B (en) * | 2013-07-31 | 2016-03-02 | 浙江大学 | Based on the half tone image generation method of sectional type error diffusion |
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