CN102508575A - Screen writing device, screen writing system and realization method thereof - Google Patents
Screen writing device, screen writing system and realization method thereof Download PDFInfo
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Abstract
The invention discloses a screen writing device, which is used by a user to write input information onto a projection screen by a hand. The screen writing device comprises a contact block and a pressure sensor, the contact block contacts with the projection screen and is used for acquiring pressure information when the user writes, and the pressure information acquired by the contact block is converted into electric signals by the pressure sensor. The screen writing device is characterized by further comprising an electric signal processing unit and a color changing material, the electric signals outputted by the pressure sensor are converted into signals which can be sensed by a color changing module by the electric signal processing unit, and the color changing material generates a corresponding color according to signals outputted by the electric signal processing unit. The screen writing device does not need a communication device, and is small in volume and convenient in carrying, and requirements of instantaneity and accuracy can be met in an interaction process. The invention simultaneously discloses a screen writing system and a realization method thereof.
Description
Technical field
The present invention relates to computer input unit, particularly relate to a kind of screen writing device that is used for writing on the projection screen, screen writing system and its implementation.
Background technology
Along with modern shadow casting technique, development of computer, people represent colourful content with literal, sound, picture, video, and this has satisfied people's demand to a certain extent.Development along with interaction technique; People more and more has been experienced the mutual enjoyment of bringing, like the iphone product of Apple company, the release of the products such as XBox of microsoft company; Make people more and more stronger to mutual serious hope, it is mutual convenient and intelligent also more and more to experience.
Mainly be divided into two types for the domestic comparatively interactive system of ripe application projection.The first kind is based on electronic whiteboard and makes up, and mainly comprises the type of skills such as touch-screen type, infrared array formula, induction and laser scan type.Its advantage is that reliability of positioning and precision are higher, and tracking velocity is very fast; Shortcoming is all need rely on special projection screen, can't be implemented in the interactive function on the aphylactic map projection plane, installs and the use inconvenience, and cost is higher.Another kind ofly then adopt special mutual pen type equipment,, cooperate the receiving sensor of external dedicated, can accurately locate pen tip position, be implemented in writing and touch control operation on the aphylactic map projection plane like ultrasound wave pen, infrared light electroprobe, optical mouse pen etc.In this type of reciprocal process, have a series of circuit module on the interaction pen of use, such as sensor, signal transmission apparatus sends the communicator of signal etc., and this all can increase the volume of pen, and is not small and exquisite, is not easy to carry, and is not easy to random operation.And in the above-mentioned interaction pen; Thereby all be to use communicator to send the pressure information that obtains to reception device external and obtain handwriting information; And communicator data loss problem can occur when in communication process, transmitting data; And the user holds interaction pen all the time, wherein also can relate to occlusion issue, can cause the location inaccurate.These loss of datas, the inaccurate problem in location all can directly cause reciprocal process to carry out real-time and accurately.
Summary of the invention
Technical matters to be solved by this invention is: remedy the deficiency of above-mentioned prior art, propose a kind of screen writing device, device volume is less, and reciprocal process is accurate in real time.
The further technical matters to be solved of the present invention is to propose a kind of screen writing system and its implementation, and reciprocal process is accurate in real time.
Technical matters of the present invention solves through following technical scheme:
A kind of screen writing device; Be used for handwritten input information on projection screen; Comprise contact block and pressure transducer, said contact block contacts with said projection screen and is used to obtain the pressure information when writing, and said pressure transducer converts the pressure information that said contact block obtains into electric signal; It is characterized in that: also comprise electric signal processing unit and off-color material; Said electric signal processing unit is the signal of said change color module ability perception with the electrical signal conversion of said pressure transducer output; Said off-color material produces corresponding color according to the signal of said electric signal processing unit output.
A kind of screen writing device is used for handwritten input information on projection screen, comprises contact block, and said contact block contacts with said projection screen and is used to obtain the pressure information when writing; Also comprise piezochromic material, the pressure information that obtains according to said contact block produces corresponding color.
Technical matters of the present invention solves through following further technical scheme:
A kind of screen writing system comprises projection screen, the screen writing device, and camera head, projection arrangement and calculation processing apparatus, said screen writing device are above-mentioned screen writing device; The colouring information that said camera head produced when taking said screen writing device and writing, the image that will include colouring information is sent to said calculation processing apparatus; Pressure information when said calculation processing apparatus obtains writing according to this colouring information computing and the positional information of said screen writing device; And convert said pressure information into the person's handwriting signal, said person's handwriting signal and said positional information are sent to said projection arrangement; Said projection arrangement demonstrates said person's handwriting signal according to the said positional information relevant position on said projection screen that obtains.
A kind of implementation method of screen writing system is characterized in that: may further comprise the steps: use above-mentioned screen writing device on said projection screen, to write; The colouring information that shooting produced when obtaining said screen writing device and writing; Pressure information when this colouring information image of computing obtains writing and the positional information of said screen writing device convert said pressure information into the person's handwriting signal; Said positional information relevant position on projection screen according to obtaining demonstrates said person's handwriting signal.
The beneficial effect of the present invention and prior art contrast is:
Screen writing device of the present invention uses electric signal processing unit and off-color material, perhaps directly uses piezochromic material, and the pressure information that contact block is obtained changes corresponding color into.During realization, take color image by external pick-up device, obtain corresponding colouring information, through handled, the promptly reducible pressure information that obtains obtains positional information simultaneously, and then can export the person's handwriting effect in the relevant position according to positional information.Screen writing device of the present invention does not send related pressure information owing to do not re-use communicator, so does not need to be provided with communicator in the screen writing device again, and the volume of screen writing device is less, is convenient for carrying.And do not send data owing to do not re-use communicator; And the mode that is to use photographed images is obtained colouring information and is obtained pressure information and positional information; Therefore reciprocal process does not have data transmission yet and loses the erroneous judgement that causes, and reciprocal process can reach in real time requirement accurately.
Description of drawings
Fig. 1 is the structural representation of the screen writing device of the specific embodiment of the invention one;
Fig. 2 is the structural representation of the screen writing system of the specific embodiment of the invention one.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention is explained further details.
Embodiment one
As shown in Figure 1, be the structural representation of the screen writing device of this embodiment.The screen writing device comprises contact block 105, pressure transducer 104, electric signal processing unit 102 and off-color material 101.
The screen writing device is a ring structure in this embodiment; The screen writing device also comprises finger ring support 103; Wherein, Contact block 105, pressure transducer 104 are arranged at the bottom of finger ring support 103, and electric signal processing unit 102 and off-color material 101 are arranged at the top of finger ring or fingerstall structure.Be to use the screen writing device of ring structure design in this embodiment, also can be designed to pen-shaped structure certainly, but the design of pen-shaped structure do not have the finger ring shapeliness, this is because the screen writing device advantages of small volume of ring structure is easy to carry; And be worn on the finger also easily when using, also can be arranged to carry out the degree of tightness operation according to the thickness of finger.
In the screen writing device of this embodiment, contact block 105 contacts with projection screen to be write and is used to obtain the pressure information when writing.Pressure transducer 104 converts the pressure information that contact block 105 obtains into electric signal, sends electric signal processing unit 102 to.Off-color material 101 is an electrochromic material, and electric signal processing unit 102 is the first electric signal processing unit.The first electric signal processing unit is the electric signal of electrochromic material ability perception with the electrical signal conversion of pressure transducer 104 outputs, and electrochromic material produces respective color according to the electric signal of first electric signal processing unit output.
Preferably, contact block 105 adopts high-abrasive materials, and the surface of contact of contact block 105 is a curved surface, for example, can contact block 105 be designed to a kind of sphere, makes to contact with the projection screen Shi Weidian that contacts.Finger is the centre of sphere when reversing up and down with the contact point in writing process like this, can obtain pressure information accurately.And electrochromic material can be selected from transition metal oxide electrochromic material, Prussian blue system, purple sieve essence or polyaniline.For example, when electrochromic material is polyaniline, when impressed voltage when-0.2 ~ 0.7V changes, that the color of polyaniline appears successively is light yellow, green, blue-green and mazarine, the i.e. corresponding a kind of color of electric pressure.Again for example; When electrochromic material is Prussian blue system, the electrochromic material that Prussian blue system is made up of painted tungsten trioxide film of negative electrode and anode painted Prussian blue (PB) film, tungsten trioxide film is the reduction coloured material; Become darkviolet by water white transparency; Prussian blue film is the heat-tinting material, becomes mazarine by water white transparency, and the electrochromic material of therefore forming with the collocation of two films has the characteristic of high visual contrast, high optics amplitude modulation.
When the screen writing device of this embodiment is worked, need to cooperate relevant apparatus to form the screen writing system and accomplish the handwriting effect.As shown in Figure 2, the screen writing system in this embodiment comprises screen writing device 1, projection screen 2, camera head 3, projection arrangement 5 and calculation processing apparatus 4.During work, screen writing device 1 contacts with projection screen 2, on projection screen 2, moves and writes, and produces corresponding color after contact pressure information is obtained in 1 work of screen writing device.Camera head 3 carries out work; The shooting of this process real-time is got off; Also and in real time giving calculation processing apparatus 4 handles; Calculation processing apparatus 4 receives the image that includes colouring information that camera heads 3 photograph, and obtains pressure information according to wherein color treatments, handles the positional information that obtains corresponding screen writing device 1 according to the position of color dot in image; And convert pressure information into the person's handwriting signal; Afterwards with the person's handwriting signal in real time of positional information that obtains and conversion be transferred to projection arrangement 5, projection arrangement 5 demonstrates the person's handwriting signal according to the positional information that obtains in projection screen 2 corresponding positions, so promptly demonstrates the writing effect of screen writing device 1 on projection screen 2.
Pressure different in the screen writing device 1 produce various colors, after calculation processing apparatus 4 computings, obtain the person's handwriting signal of different thicknesses effect, and pressure is big more, and person's handwriting is thick more, can show the person's handwriting of different thicknesses effect.For example: pressure transducer 104 is [A, B] by the change in voltage scope that the pressure size produces, and converts the change in voltage scope [C, D] that off-color material is suitable for into through the first electric signal processing unit.When voltage is changed to by C in the process of D, the color of off-color material changes to F by E, according to the difference of R in the color or G or the shared component of B the color region from E to F is divided into 16 grades, also just pressure is divided into 16 grades simultaneously.Color E is representing first grade of pressure, i.e. the minimum grade of pressure, i.e. and the thinnest grade of person's handwriting, and the like, last grade of color F representative pressure, the i.e. maximum grade of pressure, the i.e. the thickest grade of person's handwriting.
Above-mentioned screen writing system need be to the coupling of carrying out position correction and color and pressure of system before startup work.Position correction can be adopted following method: can on projection screen 2, be uniformly distributed with 16 check points; Screen writing device 1 presses 16 points successively; The coordinate information of these 16 points just is stored in the computing machine like this, and this just provides assurance for the accuracy of the position of implementation process mid point.Color and pressure coupling can adopt following method: the variation range according to the B component in the rgb color component (also can be according to the R component, the G component) is divided into 16 grades, like this each color promptly corresponding a kind of pressure rating.The color gamut E that produces according to screen writing device 1 is to F, corresponding first pressure rating of above-mentioned color E, the person's handwriting that correspondence is the thinnest; 1mm for example, along with the increase of color grade, pressure rating increases; Handwriting thickness equal difference (for example 1mm) increases, like this color F just correspondence the thick person's handwriting of 16mm.This match information is stored in the calculation processing apparatus 4 in advance.
In the work, when calculation processing apparatus 4 computings obtain positional information, extract color in the image.Because the background colour around the color in off-color material zone can clearly be different from is so be easy to this characteristic is come out.Preferably; Can the off-color material zone design be become regular figure; In image processing process, calculating the centre of gravity place of this figure, also is the geometric center of figure, according to centre of gravity place; And the relation of the position of 16 points storing during position correction, obtain screen writing device 1 and on projection screen 2, write contact point.When calculation processing apparatus 4 computings obtain the person's handwriting signal, judge which color the colouring information of protecting in the image belongs to, and combines the color of storage in advance and the match information of pressure, getting final product correspondence, to obtain relevant pressure be much, exports how thick person's handwriting signal.
The screen writing device of this embodiment, the pressure information that contact block is obtained changes corresponding color into.During realization, take color image by external pick-up device, obtain corresponding colouring information, through handled, the promptly reducible pressure information that obtains obtains positional information simultaneously, and then can export the person's handwriting effect in the relevant position according to positional information.The volume of screen writing device is less, is convenient for carrying.And do not send data owing to do not re-use communicator; And the mode that is to use photographed images is obtained colouring information and is obtained pressure information and positional information; Therefore reciprocal process does not have data transmission yet and loses the erroneous judgement that causes, and reciprocal process can reach in real time requirement accurately.
Embodiment two
The difference of the screen writing device of this embodiment and the screen writing device of embodiment one is: off-color material is a photochromic material in this embodiment.Electric signal processing unit conversion output light signal.
The screen writing device of this embodiment comprises contact block, pressure transducer, electric signal processing unit and off-color material.Wherein, contact block, pressure transducer all with embodiment one in identical, off-color material is then different with the electric signal processing unit.Off-color material is a photochromic material; The electric signal processing unit is the second electric signal processing unit; The said second electric signal processing unit is the light signal that said photochromic material can perception with the electrical signal conversion of said pressure transducer output, thereby exports respective color according to pressure information when the screen writing device is write.Afterwards, screen writing device and projection screen, the course of work when camera head, projection arrangement are formed the screen writing system with calculation processing apparatus is all identical, in this not repeat specification.
In this embodiment,, can arrive equally and make the volume of screen writing device less, be convenient for carrying though that off-color material and electric signal processing unit and embodiment one have is different, and reciprocal process effect accurately in real time.
Embodiment three
The difference of the screen writing device of this embodiment and the screen writing device of embodiment one is: off-color material is a temperature-sensing color-changing material in this embodiment.Electric signal processing unit conversion output temperature signal.
The screen writing device of this embodiment comprises contact block, pressure transducer, electric signal processing unit and off-color material.Wherein, contact block, pressure transducer all with embodiment one in identical, off-color material is then different with the electric signal processing unit.Off-color material is a temperature-sensing color-changing material; The electric signal processing unit is the 3rd electric signal processing unit; Said the 3rd electric signal processing unit is the temperature signal that said temperature-sensing color-changing material can perception with the electrical signal conversion of said pressure transducer output, thereby exports respective color according to pressure information when the screen writing device is write.Afterwards, screen writing device and projection screen, the course of work when camera head, projection arrangement are formed the screen writing system with calculation processing apparatus is all identical, in this not repeat specification.
In this embodiment,, can arrive equally and make the volume of screen writing device less, be convenient for carrying though that off-color material and electric signal processing unit and embodiment one have is different, and reciprocal process effect accurately in real time.
Embodiment four
The difference of the screen writing device of this embodiment and the screen writing device of embodiment one is: off-color material is a piezochromic material in this embodiment.And no longer need pressure transducer and electric signal processing unit in the screen writing device.
The screen writing device of this embodiment comprises contact block and piezochromic material.Wherein, Contact block; Contacting with projection screen to be write is used to obtain the pressure information when writing, and the pressure information that piezochromic material is obtained according to said contact block produces corresponding color, thereby exports respective color according to pressure information when the screen writing device is write.Afterwards, screen writing device and projection screen, the course of work when camera head, projection arrangement are formed the screen writing system with calculation processing apparatus is all identical, in this not repeat specification.
In this embodiment,, can arrive equally and make the volume of screen writing device less, be convenient for carrying though that off-color material and working method thereof and embodiment one have is different, and reciprocal process effect accurately in real time.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, make some substituting or obvious modification under the prerequisite of the present invention design not breaking away from, and performance or purposes are identical, all should be regarded as belonging to protection scope of the present invention.
Claims (10)
1. screen writing device; Be used for handwritten input information on projection screen; Comprise contact block and pressure transducer; Said contact block contacts with said projection screen and is used to obtain the pressure information when writing, and said pressure transducer converts the pressure information that said contact block obtains into electric signal; It is characterized in that: also comprise electric signal processing unit and off-color material;
Said electric signal processing unit is the signal of said change color module ability perception with the electrical signal conversion of said pressure transducer output;
Said off-color material produces corresponding color according to the signal of said electric signal processing unit output.
2. screen writing device according to claim 1 is characterized in that: said off-color material is an electrochromic material; Said electric signal processing unit is the first electric signal processing unit, and the said first electric signal processing unit is the electric signal of said electrochromic material ability perception with the electrical signal conversion of said pressure transducer output.
3. screen writing device according to claim 2 is characterized in that: said electrochromic material is transition metal oxide electrochromic material, Prussian blue system, purple sieve essence or polyaniline.
4. screen writing device according to claim 1 is characterized in that: said off-color material is a photochromic material; Said electric signal processing unit is the second electric signal processing unit, and the said second electric signal processing unit is the light signal of said photochromic material ability perception with the electrical signal conversion of said pressure transducer output.
5. screen writing device according to claim 1 is characterized in that: said off-color material is a temperature-sensing color-changing material; Said electric signal processing unit is the 3rd electric signal processing unit, and said the 3rd electric signal processing unit is the temperature signal of said temperature-sensing color-changing material ability perception with the electrical signal conversion of said pressure transducer output.
6. screen writing device according to claim 1 is characterized in that: said contact block adopts high-abrasive material, and the surface of contact of said contact block is a curved surface, makes to contact for point with said projection screen.
7. screen writing device according to claim 1; It is characterized in that: said screen writing device is finger ring or fingerstall structure; Said contact block, pressure transducer are arranged at the bottom of said finger ring or fingerstall structure, and said electric signal processing unit and off-color material are arranged at the top of said finger ring or fingerstall structure.
8. a screen writing device is used for handwritten input information on projection screen, comprises contact block, and said contact block contacts with said projection screen and is used to obtain the pressure information when writing; It is characterized in that: also comprise piezochromic material, the pressure information that obtains according to said contact block produces corresponding color.
9. screen writing system, it is characterized in that: comprise projection screen, screen writing device, camera head, projection arrangement and calculation processing apparatus, said screen writing device are like the arbitrary described screen writing device of claim 1 to 8; The colouring information that said camera head produced when taking said screen writing device and writing, the image that will include colouring information is sent to said calculation processing apparatus; Pressure information when said calculation processing apparatus obtains writing according to this colouring information computing and the positional information of said screen writing device; And convert said pressure information into the person's handwriting signal, said person's handwriting signal and said positional information are sent to said projection arrangement; Said projection arrangement demonstrates said person's handwriting signal according to the said positional information relevant position on said projection screen that obtains.
10. the implementation method of a screen writing system is characterized in that: may further comprise the steps: use and write on said projection screen like claim 1 to 8 an arbitrary described screen writing device; The colouring information that shooting produced when obtaining said screen writing device and writing; Pressure information when this colouring information image of computing obtains writing and the positional information of said screen writing device convert said pressure information into the person's handwriting signal; Said positional information relevant position on projection screen according to obtaining demonstrates said person's handwriting signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110354897.4A CN102508575B (en) | 2011-11-10 | 2011-11-10 | Screen writing device, screen writing system and realization method thereof |
| HK12107227.6A HK1166541A1 (en) | 2011-11-10 | 2012-07-23 | Screen writing device, screen writing system and implementation method of writing on the screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110354897.4A CN102508575B (en) | 2011-11-10 | 2011-11-10 | Screen writing device, screen writing system and realization method thereof |
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| CN102508575A true CN102508575A (en) | 2012-06-20 |
| CN102508575B CN102508575B (en) | 2014-10-22 |
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| CN201110354897.4A Expired - Fee Related CN102508575B (en) | 2011-11-10 | 2011-11-10 | Screen writing device, screen writing system and realization method thereof |
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| HK (1) | HK1166541A1 (en) |
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| CN103246072A (en) * | 2013-05-15 | 2013-08-14 | 福州大学 | Dynamic grating for 2D-to-3D (two-dimension to three-dimension) conversion |
| CN103744555A (en) * | 2014-01-06 | 2014-04-23 | 溢洋光电（深圳）有限公司 | Bidirectional display and reduction method for instant messaging handwriting as well as related system and method |
| CN106388090A (en) * | 2016-11-10 | 2017-02-15 | 北京仁光科技有限公司 | Infrared screen touch glove based on interactive large screen |
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| CN103744555B (en) * | 2014-01-06 | 2017-11-10 | 溢洋光电（深圳）有限公司 | Instant messaging handwriting bi-directional display restoring method and related system and method |
| CN106547377A (en) * | 2016-10-27 | 2017-03-29 | 广东小天才科技有限公司 | A kind of stroke display output method and device of writing system |
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| CN106775007B (en) * | 2016-11-24 | 2020-01-03 | 广东小天才科技有限公司 | Display method of electronic blackboard and electronic blackboard |
| CN106775007A (en) * | 2016-11-24 | 2017-05-31 | 广东小天才科技有限公司 | The display methods and electronic blackboard of electronic blackboard |
| CN109542326A (en) * | 2018-11-29 | 2019-03-29 | 广州朗国电子科技有限公司 | The method and system of touch apparatus realization multiple color written handwriting |
| CN109542326B (en) * | 2018-11-29 | 2020-10-13 | 广州朗国电子科技有限公司 | Method and system for realizing handwriting writing in multiple colors by touch equipment |
| US20200220998A1 (en) * | 2019-01-09 | 2020-07-09 | Timothy E. Bridges | Method and apparatus for quickly capturing images with one hand |
| CN111999927A (en) * | 2020-09-15 | 2020-11-27 | 业成科技（成都）有限公司 | Electronic handwriting board and handwriting restoration method |
| CN114115558A (en) * | 2021-11-04 | 2022-03-01 | 北京钛方科技有限责任公司 | Touch pen identification method, device and system, storage medium and touch pen |
| CN114115558B (en) * | 2021-11-04 | 2024-06-11 | 北京钛方科技有限责任公司 | Touch pen identification method, device and system, storage medium and touch pen |
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| CN102508575B (en) | 2014-10-22 |
| HK1166541A1 (en) | 2012-11-02 |
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