CN104346126B - Method, method for displaying image and system that image is shown in real time with mobile spot - Google Patents
Method, method for displaying image and system that image is shown in real time with mobile spot Download PDFInfo
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- CN104346126B CN104346126B CN201410602300.7A CN201410602300A CN104346126B CN 104346126 B CN104346126 B CN 104346126B CN 201410602300 A CN201410602300 A CN 201410602300A CN 104346126 B CN104346126 B CN 104346126B
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- 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
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor
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Abstract
The invention discloses method, method for displaying image and image display system that a kind of image is shown in real time with mobile spot, in the image display system：Device used for image display is in showing a base image；Spot tracks determining device is used to determine the spot tracks moved in currently displaying base image in real time；The spot tracks that spot tracks display control unit is used to control to determine in real time are overlapped display with base image；In this manner it is achieved that showing the base image and the spot tracks moved in the base image in real time；Storage device is used for the corresponding relation for setting up and storing spot tracks and base image；Spot tracks display control unit is additionally operable to when image display device shows a base image, if determining that base image has corresponding spot tracks according to the corresponding relation of storage, shows spot tracks in base image in the lump；In this manner it is achieved that showing the base image and the spot tracks stayed in the base image again.
Description
Technical Field
The invention relates to the technical field of display, in particular to a method for displaying an image and a moving light spot in real time, an image display method and an image display system.
Background
At present, presentation documents (PPT) are widely used in education, lectures, and conferences. In the PPT demonstration process, the laser pen can be used as a striking moving light spot to point the PPT in a long distance, and the effect of reminding audiences to watch key information is achieved.
In the process of demonstrating the PPT, although the laser pen can point the PPT at a long distance, the track of the laser pen cannot be left in the area pointed by the laser pen, so that the track of the laser pen disappears when the audience does not clearly see the key information pointed by the laser pen. And when a certain image in the PPT is played again later, the track of the focal point information indicated by the laser pen in the previous demonstration process cannot be displayed together in the image.
Therefore, how to display and re-display the image and the track of the light spot moving on the image in real time is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a method for displaying an image and a moving light spot in real time, so as to display the image and a track of the light spot moving on the image in real time.
Therefore, an embodiment of the present invention provides a method for displaying an image and a moving light spot in real time, including:
displaying a basic image;
determining a track of a light spot moving on the currently displayed basic image in real time;
controlling the light spot track determined in real time and the basic image to be displayed in a superposition manner; and the number of the first and second groups,
and establishing and storing the corresponding relation between the light spot track and the basic image so that the light spot track can be displayed on the basic image together according to the corresponding relation when the basic image is displayed again in the follow-up process.
According to the method for displaying the image and the moving light spot in real time provided by the embodiment of the invention, the light spot track moving on the currently displayed basic image is determined in real time, and the light spot track determined in real time is superposed with the basic image for displaying, so that the real-time display of the basic image and the light spot track moving on the basic image can be realized.
The embodiment of the invention also provides an image display method, which is used for displaying the image and the light spot track moving on the image again.
Therefore, an embodiment of the present invention further provides an image display method, including:
determining a basic image to be displayed currently;
determining whether the basic image to be displayed currently has a corresponding light spot track according to the corresponding relation between the stored light spot track and the basic image, and if so, controlling the basic image to be displayed currently and the corresponding light spot track to be displayed together; and when the basic image is displayed in the prior art, the corresponding relation is stored after the light spot track moving on the basic image is determined in real time.
In the image display method provided by the embodiment of the invention, when the basic image is displayed in the past, the corresponding relationship between the spot track moving on the basic image determined in real time and the basic image is stored, so that when the basic image is displayed again, the basic image and the corresponding spot track can be displayed together according to the stored corresponding relationship, and the basic image and the spot track left on the basic image can be displayed again.
The embodiment of the invention also provides an image display system which is used for realizing real-time display and redisplay of the image and the light spot track moving on the image.
Therefore, an embodiment of the present invention further provides an image display system, including:
the image display device is used for displaying a basic image;
the light spot track determining device is used for determining the light spot track moving on the currently displayed basic image in real time;
the storage device is used for establishing and storing the corresponding relation between the light spot track and the basic image;
the light spot track display control device is used for controlling the light spot track determined in real time and the basic image to be displayed in a superposition mode; and when the image display device displays a basic image, if the corresponding light spot track of the basic image is determined to exist according to the corresponding relation stored in the storage device, the light spot track is displayed on the basic image.
In a possible implementation manner, in the image display system provided in an embodiment of the present invention, the image display apparatus includes: the projector comprises a projector and a projection screen which is positioned on the light-emitting side of the projector and has a certain distance with the projector; the light spot track display control device comprises: an electrochromic transparent display layer and a first processor; wherein,
the electrochromic transparent display layer is positioned on the surface of the projection screen or on the light-emitting side of the projector;
and the first processor is used for loading voltage to the position, corresponding to the light spot track, on the electrochromic transparent display layer according to the light spot track determined by the light spot track determining device, so that the position, corresponding to the light spot track, on the electrochromic transparent display layer is changed in color, and the basic image is superposed and displayed.
In a possible implementation manner, in the image display system provided in an embodiment of the present invention, the light spot track determining apparatus includes: a camera and a third processor; wherein,
the photographing device is used for photographing the image currently displayed on the projection screen according to a preset frequency;
and the third processor is used for determining the light spot track of the moving light spot moving on the basic image according to the difference between the pictures shot by the camera at different moments.
In a possible implementation manner, in the image display system provided in an embodiment of the present invention, the light spot track determining apparatus includes: the device comprises a photosensitive layer, a first driving circuit, a second driving circuit and a second processor, wherein the photosensitive layer is provided with a plurality of photosensitive units which are arranged in a matrix; wherein,
the electrochromic transparent display layer is positioned on the surface of the projection screen, and the photosensitive layer is positioned inside the electrochromic transparent display layer; or, the electrochromic transparent display layer is positioned on the light-emitting side of the projector, and the photosensitive layer is positioned on the surface of the projection screen;
the first driving circuit is used for emitting scanning signals to the photosensitive units in each row in the photosensitive layer; the second driving circuit is used for receiving pulse signals emitted by the photosensitive units irradiated by light spots; and the second processor is used for determining the track of the light spot moving on the basic image in real time according to the scanning position of the scanning signal and the sending position of the pulse signal.
In a possible implementation manner, in the image display system provided in an embodiment of the present invention, the image display apparatus includes: a flat panel display; the light spot track display control device comprises: an electrochromic transparent display layer and a first processor; wherein,
the electrochromic transparent display layer is positioned on the light emergent side of the flat panel display or positioned inside the flat panel display;
and the first processor is used for loading voltage to the position, corresponding to the light spot track, on the electrochromic transparent display layer according to the light spot track determined by the light spot track determining device, so that the position, corresponding to the light spot track, on the electrochromic transparent display layer is changed in color, and the basic image is superposed and displayed.
In a possible implementation manner, in the image display system provided in an embodiment of the present invention, the light spot track determining apparatus includes: a camera and a third processor; wherein,
the photographing device is used for photographing the image currently displayed on the flat panel display according to a preset frequency;
and the third processor is used for determining the light spot track of the moving light spot moving on the basic image according to the difference between the pictures shot by the camera at different moments.
In a possible implementation manner, in the image display system provided in an embodiment of the present invention, the light spot track determining apparatus includes: the device comprises a photosensitive layer, a first driving circuit, a second driving circuit and a second processor, wherein the photosensitive layer is provided with a plurality of photosensitive units which are arranged in a matrix; wherein,
the photosensitive layer is positioned inside the electrochromic transparent display layer;
the first driving circuit is used for emitting scanning signals to the photosensitive units in each row in the photosensitive layer; the second driving circuit is used for receiving pulse signals emitted by the photosensitive units irradiated by light spots; and the second processor is used for determining the track of the light spot moving on the basic image in real time according to the scanning position of the scanning signal and the sending position of the pulse signal.
In the image display system provided by the embodiment of the invention, the image display device is used for displaying a basic image; the light spot track determining device is used for determining the light spot track moving on the currently displayed basic image in real time; the light spot track display control device is used for controlling the light spot track determined in real time and the basic image to be displayed in a superposition mode; therefore, the basic image and the light spot track moving on the basic image can be displayed in real time; the storage device is used for establishing and storing the corresponding relation between the light spot track and the basic image; the light spot track display control device is also used for displaying the light spot track on the basic image if the corresponding light spot track exists in the basic image according to the stored corresponding relation when the image display device displays the basic image; in this way, it is possible to achieve a re-display of the base image and the spot track left on the base image.
Drawings
Fig. 1 is a flowchart of a method for displaying an image and a moving light spot in real time according to an embodiment of the present invention;
FIG. 2 is a flowchart of an image display method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an image display system according to an embodiment of the present invention;
fig. 4-9 are schematic structural diagrams of a display system according to an embodiment of the present invention.
Detailed Description
The following describes in detail specific embodiments of a method for displaying an image and a moving light spot in real time, an image display method, and an image display system according to an embodiment of the present invention with reference to the accompanying drawings.
The shapes and dimensions of the various devices in the drawings are not to be considered as true proportions, but are merely intended to illustrate the invention.
The method for displaying an image and a moving light spot in real time provided by the embodiment of the invention, as shown in fig. 1, comprises the following steps:
s101, displaying a basic image;
s102, determining a light spot track moving on a currently displayed basic image in real time;
s103, controlling the light spot track determined in real time and the basic image to be displayed in a superposition mode;
and S104, establishing and storing the corresponding relation between the light spot track and the basic image, so that the light spot track can be displayed on the basic image together according to the corresponding relation when the basic image is displayed again in the following step.
According to the method provided by the embodiment of the invention, the light spot track moving on the currently displayed basic image is determined in real time, and the light spot track determined in real time and the basic image are displayed in a superposition manner, so that the real-time display of the basic image and the light spot track moving on the basic image can be realized.
An embodiment of the present invention further provides an image display method, as shown in fig. 2, including:
s201, determining a basic image to be displayed currently;
s202, determining whether the corresponding light spot track exists in the basic image to be displayed currently according to the corresponding relation between the stored light spot track and the basic image; if yes, go to step S203; if not, executing step S204;
s203, controlling the current basic image to be displayed and the corresponding light spot track to be displayed together; when the basic image is displayed in the past, the corresponding relation is stored after the light spot track moving on the basic image is determined in real time;
and S204, displaying the current basic image to be displayed.
In the method provided by the embodiment of the invention, when the basic image is displayed in the past, the corresponding relation between the spot track moving on the basic image determined in real time and the basic image is stored, so that when the basic image is displayed again, the basic image and the corresponding spot track can be displayed together according to the stored corresponding relation, and the basic image and the spot track left on the basic image can be displayed again.
An embodiment of the present invention further provides an image display system, as shown in fig. 3, including:
an image display device 31 for displaying a basic image;
a light spot track determining device 32 for determining a light spot track moving on the currently displayed basic image in real time;
the storage device 33 is used for establishing and storing the corresponding relation between the light spot track and the basic image;
the light spot track display control device 34 is used for controlling the light spot track determined in real time and the basic image to be displayed in a superposition mode; and when the image display device displays a basic image, if the corresponding light spot track of the basic image is determined according to the corresponding relation stored in the storage device, the light spot track is displayed on the basic image.
In the image display system provided by the embodiment of the invention, the light spot track determining device determines the light spot track moving on the currently displayed basic image in real time, and the light spot track display control device displays the light spot track determined in real time and the basic image in a superposition manner, so that the real-time display of the basic image and the light spot track moving on the basic image can be realized; when the basic image is displayed in front of the image display device, the storage device stores the corresponding relation between the spot track moving on the basic image determined in real time and the basic image, so that when the image display device displays the basic image again, the spot track display control device can display the basic image and the corresponding spot track together according to the corresponding relation stored in the storage device, and the basic image and the spot track left on the basic image can be displayed again.
In specific implementation, the image display system provided by the embodiment of the invention can be specifically applied to a PPT demonstration environment, and during the PPT demonstration, the light spot track of the laser pen on the slide can be determined in real time, so that the slide and the light spot track moving on the slide can be displayed in real time; and storing the corresponding relation between the slides and the light spot tracks moving on the slides, and marking the light spot tracks moving on the slides to be consistent with the page numbers of the corresponding slides, so that when a slide is displayed again, the light spot tracks left on the slide and the slide can be displayed simultaneously.
In practical implementation, in the image display system provided in the embodiment of the present invention, as shown in fig. 4 to 7, the image display device 31 may specifically be a projector 311 and a projection screen 312; alternatively, as shown in fig. 8 and 9, the image display device 31 may be specifically a flat panel display 313, for example: liquid Crystal Displays (LCDs), Organic electroluminescent displays (OLEDs), and the like; alternatively, the image display device 31 may be specifically another device capable of displaying an image, and is not limited herein.
In practical implementation, in the image display system provided in the embodiment of the present invention, as shown in fig. 4 to 7, the image display device 31 specifically includes: when the projector 311 and the projection screen 312 located on the light emitting side of the projector 311 and having a certain distance from the projector 311, the light spot trajectory display control device 34 may specifically include: an electrochromic transparent display layer 341 and a first processor 342; wherein, the electrochromic transparent display layer 341 is located on the surface of the projection screen 312 (as shown in fig. 4 and fig. 6), that is, the electrochromic transparent display layer 341 is attached to the surface of the projection screen 312, or, the electrochromic transparent display layer 341 is located on the light-emitting side of the projector 311 (as shown in fig. 5 and fig. 7), that is, the electrochromic transparent display layer 341 is attached to the surface of the light-emitting side of the projector 311; the first processor 342 is configured to load a voltage to a position on the electrochromic transparent display layer 341 corresponding to the light spot track according to the light spot track determined by the light spot track determination device 32, and because the electrochromic transparent display layer 341 is made of an electrochromic material, the first processor 342 loads a voltage to a position on the electrochromic transparent display layer 341 corresponding to the light spot track, so that the position on the electrochromic transparent display layer 341 corresponding to the light spot track (shown by a circle in fig. 4-7) can be changed in color, and other positions on the electrochromic transparent display layer 341 remain transparent, thereby enabling the display to be superimposed with the base image.
It should be noted that, as shown in fig. 4 and fig. 6, the electrochromic transparent display layer 341 is located on the surface of the projection screen 312, and the size of the electrochromic transparent display layer 341 should be consistent with the size of the projection screen 312, that is, the electrochromic transparent display layer 341 completely covers the surface of the projection screen 312 (for convenience of illustration, the size of the electrochromic transparent display layer 341 shown in fig. 4 is slightly smaller than the size of the projection screen 312); alternatively, as shown in fig. 5 and 7, the electrochromic transparent display layer 341 is located on the light-emitting side of the projector 311, and the size of the electrochromic transparent display layer 341 should be consistent with the size of the light-emitting side of the projector 311, that is, the electrochromic transparent display layer 341 completely covers the surface of the light-emitting side of the projector 311.
In practical implementation, in the image display system provided in the embodiment of the present invention, as shown in fig. 4 and 5, the light spot track determining device 32 may specifically include: a camera 321 and a third processor 322; the camera 321 is configured to capture an image currently displayed on the projection screen 312 according to a preset frequency, and specifically, the preset frequency captured by the camera 321 may be generally controlled within a range from 20Hz to 30Hz, which is not limited herein; and the third processor 322 is configured to determine, in real time, a track of the light spot moved on the base image by the moving light spot according to a difference between pictures taken by the camera 321 at different times.
In practical implementation, in the image display system provided in the embodiment of the present invention, as shown in fig. 6 and 7, the light spot track determining device 32 may specifically include: a photosensitive layer 323 having a plurality of photosensitive cells arranged in a matrix, a first driving circuit 324, a second driving circuit 325, and a second processor 326; as shown in fig. 6, the electrochromic transparent display layer 341 is located on the surface of the projection screen 312, and the photosensitive layer (not shown in fig. 6) is located inside the electrochromic transparent display layer 341, that is, the electrochromic transparent display layer 341 including a plurality of photosensitive units arranged in a matrix is attached to the surface of the projection screen 312; alternatively, as shown in fig. 7, the electrochromic transparent display layer 341 is located on the light-emitting side of the projector 311, and the photosensitive layer 323 is located on the surface of the projection screen 312, that is, the photosensitive layer 323 is attached to the surface of the projection screen 312; a first driving circuit 324 for emitting scanning signals to each row of photosensitive cells in the photosensitive layer 323; a second driving circuit 325 for receiving the pulse signal emitted from the light sensing unit irradiated by the light spot; and a second processor 326 for determining the track of the light spot moving on the base image in real time according to the scanning position of the scanning signal and the emission position of the pulse signal. Specifically, the first driving circuit 324 scans the photosensitive units in the photosensitive layer 323 line by line, the pulse signals emitted by the photosensitive units irradiated by the light spots are received by the second driving circuit 325, and the second processor 326 determines the positions of the photosensitive units irradiated by the light spots according to the rows where the scanning signals are located and the columns where the pulse signals are located, so as to determine the track of the light spots moving on the base image in real time.
It should be noted that, as shown in fig. 7, the photosensitive layer 323 is located on the surface of the projection screen 312, and the size of the photosensitive layer 323 should be consistent with the size of the projection screen 312, that is, the photosensitive layer 323 completely covers the surface of the projection screen 312 (for convenience of illustration, the size of the photosensitive layer 323 shown in fig. 7 is slightly smaller than the size of the projection screen 312).
In a specific implementation, in the image display system according to the embodiment of the present invention, as shown in fig. 8 and 9, when the image display device 31 is a flat panel display 313, the light spot trajectory display control device 34 may specifically include: an electrochromic transparent display layer 341 and a first processor 342; the electrochromic transparent display layer 341 may be located on the light exit side of the flat panel display 313, that is, the electrochromic transparent display layer 341 is attached to the surface of the flat panel display 313; alternatively, the electrochromic transparent display layer 341 may be located inside the flat panel display 313, i.e., the electrochromic transparent display layer 341 is embedded inside the flat panel display 313; the first processor 342 is configured to load a voltage to a position on the electrochromic transparent display layer 341 corresponding to the light spot track according to the light spot track determined by the light spot track determination device 32, and because the electrochromic transparent display layer 341 is made of an electrochromic material, the first processor 342 loads a voltage to a position on the electrochromic transparent display layer 341 corresponding to the light spot track, so that the position on the electrochromic transparent display layer 341 corresponding to the light spot track (shown by a circle in fig. 8 and 9) can be changed in color, and other positions on the electrochromic transparent display layer 341 remain transparent, thereby enabling the display to be superimposed with the base image.
It should be noted that, as shown in fig. 8 and 9, the electrochromic transparent display layer 341 is located on the surface or inside of the flat panel display 313, and the size of the electrochromic transparent display layer 341 should be consistent with the size of the flat panel display 313 (for convenience of illustration, the size of the electrochromic transparent display layer 341 shown in fig. 8 and 9 is slightly smaller than the size of the flat panel display 313).
In a specific implementation, in the image display system provided in the embodiment of the present invention, as shown in fig. 8, the light spot track determining device 32 may specifically include: a camera 321 and a third processor 322; the camera 321 is configured to capture an image currently displayed on the flat panel display 313 according to a preset frequency, and specifically, the preset frequency captured by the camera 321 may be generally controlled within a range from 20Hz to 30Hz, which is not limited herein; and the third processor 322 is configured to determine, in real time, a track of the light spot moved on the base image by the moving light spot according to a difference between pictures taken by the camera 321 at different times.
In a specific implementation, in the image display system provided in the embodiment of the present invention, as shown in fig. 9, the light spot track determining device 32 may specifically include: a photosensitive layer (not shown in fig. 9) having a plurality of photosensitive cells arranged in a matrix, a first driving circuit 324, a second driving circuit 325, and a second processor 326; the photosensitive layer is located inside the electrochromic transparent display layer 341, that is, the electrochromic transparent display layer 341 including a plurality of photosensitive units arranged in a matrix is attached to the surface of the flat panel display 313, or the electrochromic transparent display layer 341 including a plurality of photosensitive units arranged in a matrix is embedded inside the flat panel display 313; a first driving circuit 324 for emitting scanning signals to each row of photosensitive cells in the photosensitive layer; a second driving circuit 325 for receiving the pulse signal emitted from the light sensing unit irradiated by the light spot; and a second processor 326 for determining the track of the light spot moving on the base image in real time according to the scanning position of the scanning signal and the emission position of the pulse signal. Specifically, the first driving circuit 324 scans the photosensitive units in the photosensitive layer line by line, the pulse signals emitted by the photosensitive units irradiated by the light spots are received by the second driving circuit 325, and the second processor 326 determines the positions of the photosensitive units irradiated by the light spots according to the rows where the scanning signals are located and the columns where the pulse signals are located, so as to determine the track of the light spots moving on the base image in real time.
In a specific implementation, in the image display system provided by the embodiment of the present invention, as shown in fig. 8, the storage device 33 may be located outside the flat panel display 313, or, as shown in fig. 9, a storage device (not shown in fig. 9) may be embedded inside the flat panel display 313, which is not limited herein.
It should be noted that, in the image display system provided in the embodiment of the present invention, the light spot track determining device is not limited to include the photosensitive layer, the first driving circuit, the second driving circuit, and the second processor, nor is it limited to include the photographing device and the third processor, and the light spot track may be determined by using a large field lens instead of the photographing device, or of course, other devices capable of detecting a moving light spot track may be used to determine the light spot track, which is not limited herein.
Moreover, the electrochromic transparent display layer in the light spot track display control device is made of an electrochromic material, when the first processor loads voltage on the position, corresponding to the light spot track, on the electrochromic transparent display layer, the position, corresponding to the light spot track, on the electrochromic transparent display layer can be changed in color, and other positions on the electrochromic transparent display layer are still transparent; alternatively, a liquid crystal transparent display layer or another projector may be used instead of the electrochromic transparent display layer, which is not limited herein.
The embodiment of the invention provides a method for displaying an image and a moving light spot in real time, an image display method and an image display system, wherein the image display system comprises: the image display device is used for displaying a basic image; the light spot track determining device is used for determining the light spot track moving on the currently displayed basic image in real time; the light spot track display control device is used for controlling the light spot track determined in real time and the basic image to be displayed in a superposition mode; therefore, the basic image and the light spot track moving on the basic image can be displayed in real time; the storage device is used for establishing and storing the corresponding relation between the light spot track and the basic image; the light spot track display control device is also used for displaying the light spot track on the basic image if the corresponding light spot track exists in the basic image according to the stored corresponding relation when the image display device displays the basic image; in this way, it is possible to achieve a re-display of the base image and the spot track left on the base image.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
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| CN1786981A (en) * | 2004-12-09 | 2006-06-14 | 玴荣科技股份有限公司 | Laser handwriting real-time recognition and recording briefing system |
| CN101251784A (en) * | 2008-04-03 | 2008-08-27 | 上海交通大学 | Laser Pointer Pointing and Spot Track Recognition Method |
| CN102707839A (en) * | 2011-03-28 | 2012-10-03 | 京东方科技集团股份有限公司 | Display device |
| CN104108265A (en) * | 2013-04-17 | 2014-10-22 | 鸿富锦精密工业（深圳）有限公司 | Electronic writing board |
| CN103729096A (en) * | 2013-12-25 | 2014-04-16 | 京东方科技集团股份有限公司 | Interaction recognition system and display unit provided with same |
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| CN104346126A (en) | 2015-02-11 |
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