CN102707839B - A kind of display device - Google Patents
A kind of display device Download PDFInfo
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- CN102707839B CN102707839B CN201110075808.2A CN201110075808A CN102707839B CN 102707839 B CN102707839 B CN 102707839B CN 201110075808 A CN201110075808 A CN 201110075808A CN 102707839 B CN102707839 B CN 102707839B
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Abstract
The invention discloses a kind of display device, the problem of contactless hand-written, painting function must not be realized for solution by display device.This display device comprises: the first radio interface unit wirelessly receiving screen image pickup signal; The light spot position recognition unit of the light spot position that laser beam irradiation produces at screen is identified from screen image pickup signal; Be responsible for the painting canvas processing unit of synthesis luminescent spot track; The video signal processing unit of superposition painting canvas vision signal and the vision signal from video signal source; The screen display unit be connected with video signal processing unit; Wherein, described light spot position recognition unit one end is connected with described first radio interface unit, and the other end is connected with described painting canvas processing unit; The described painting canvas processing unit other end and described video signal processing unit.The present invention, in conjunction with laser technology, short-distance wireless communication technology and image processing techniques, makes the operations such as user carries out writing by telepilot on screen, drawing.
Description
Technical Field
The present invention relates to a display device, and more particularly, to a display device having a writing function.
Background
The existing display devices, such as liquid crystal televisions, rear projection televisions, computer monitors, etc., are generally mainly used for receiving display signals and presenting colorful television program contents or digital video contents to users, and along with the development of high and new technologies and the popularization of network applications, the display devices are integrated with more and more extended functions to meet the increasingly rich demands of people. For example, a touch screen is integrated in some display devices, and a user can control displayed contents such as page turning, document marking and the like through fingers, so that the display device is suitable for small-sized meeting occasions. For another example, a user may run some application programs through a host device having a data processing function, such as a PC, a notebook, or the like, provide input for the application programs in a manner of writing a drawing board, a mouse, or the like, and output the input to the display device after being processed by the application programs, thereby implementing functions of writing, drawing, and the like on the display device.
However, the display device capable of implementing writing and drawing functions is not very expensive, and is inconvenient to use because it needs to complete corresponding functions by other processing equipment.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a display device, which can realize the non-contact handwriting and drawing functions through the display device.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a display device, the display device comprising:
a first wireless interface unit for receiving screen camera signals in a wireless mode;
a spot position identifying unit that identifies the position of the laser spot on the screen from the screen image pickup signal;
the canvas processing unit is responsible for synthesizing the light spot tracks;
a video signal processing unit which superposes the canvas video signal and the video signal from the video signal source;
the screen display unit is connected with the video signal processing unit;
one end of the light spot position identification unit is connected with the first wireless interface unit, and the other end of the light spot position identification unit is connected with the canvas processing unit; the other end of the canvas processing unit is connected with the video signal processing unit.
Further, the light spot position identifying unit includes:
the screen identification unit is used for identifying a video frame comprising a complete screen and a laser spot and is connected with the first wireless interface unit;
the correcting unit is used for correcting the video frame and is connected with the screen identifying unit;
and the position identification unit for calculating the actual position of the laser spot on the screen is respectively connected with the correction unit and the canvas processing unit.
Further, the canvas processing unit includes:
a track storage unit;
the light spot track processing unit is connected with the track storage unit and synthesizes light spot track groups according to the position of the laser light spot on the screen;
and the canvas output unit for outputting the light spot track grouping on the internal storage canvas is respectively connected with the track storage unit and the video signal processing unit.
Further, the display device further includes a remote control module, the remote control module including:
the second wireless interface unit is connected with the first wireless interface unit in a wireless mode;
a laser emitting unit that emits a laser beam to a screen;
the switch key input unit is used for controlling the on and off of the laser emission unit and is connected with the laser emission unit;
and the camera shooting unit is used for shooting the screen and is connected with the second wireless interface unit.
Further, the remote controller module further comprises: and the erasing key input unit is used for generating an erasing signal and is connected with the second wireless interface unit.
Further, the canvas processing unit further comprises: and the erasing unit is respectively connected with the first wireless interface unit, the track storage unit and the canvas output unit.
Further, the first wireless interface unit and the second wireless interface unit are bluetooth interfaces or Wi-Fi wireless transmission protocol interfaces.
The display device provided by the invention combines the laser technology, the short-distance wireless communication technology and the image processing technology, so that a user can mark video contents on a screen through a remote controller and perform operations such as writing, drawing and the like on the screen; by adopting the invention, the video-on-demand with the time-shifting function, the network television with the internet function and the future intelligent television are combined, so that richer applications can be developed, and the requirements of people on interactivity can be met.
Drawings
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a functional module of a display module in the display device according to the embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a functional unit of a hotspot location identification unit in a display module according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a functional unit structure of a canvas processing unit in a display module according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a unit functional component structure of a remote control module in a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings by way of examples.
Fig. 1 is a schematic diagram of a composition structure of a display device provided by the present invention, the display device includes two major portions, namely a display module 100 and a remote control module 110, wherein the display module 100 may be a television, a computer monitor, a monitor, etc. The basic function of the existing display module 100 is to receive a video signal from a video signal source and then display it on a screen; the invention expands the functions of the display module 100 and the remote controller module 110, adds the laser emitting unit 112 and the camera unit 111 in the remote controller module 110, emits the laser beam 120 to the screen through the laser emitting unit 112, makes the camera unit 111 take the picture of the screen of the display module 100, then sends the screen camera signal to the display module 100 in a wireless mode, the display module 100 processes the screen camera signal to obtain the track information of the laser beam, and then superposes the track image of the laser beam and the video signal of the video signal source, thereby realizing the functions of writing, drawing and the like on the screen.
Fig. 2 is a schematic diagram illustrating a functional module of a display module in the display device according to the present invention, wherein the display module 100 includes: a first wireless interface unit 201, a light point position identification unit 202, a canvas processing unit 203, a video signal processing unit 204, a screen display unit 205;
the first wireless interface unit 201 receives the screen image pickup signal transmitted by wireless, and transmits the screen image pickup signal to the light spot position recognition unit 202. Wherein, the screen image pick-up signal comprises a light spot 130 generated by laser irradiation on a screen; the wireless mode can adopt a wireless short-distance transmission protocol, such as Bluetooth, Wi-Fi and the like.
The light spot position identifying unit 202 identifies the position of the laser light spot on the screen from the screen image pickup signal, and transmits the position information to the canvas processing unit 203. In the identification process, the screen position and the laser spot position need to be identified from the video frame, and if the screen position and the laser spot position cannot be identified, the corresponding video frame is discarded.
The canvas processing unit 203 synthesizes a light spot trajectory made up of a laser light spot on the internal canvas object, and outputs a canvas video signal to the video signal processing unit 204.
A video signal processing unit 204 for performing processing such as decompression and decoding on a video signal from a video signal source; on the other hand, the video signal from the canvas processing unit is received, the video signal from the canvas processing unit and the video signal from the video signal source are superimposed together, and the superimposed image signal is output to the screen display unit 205.
And an on-screen display unit 205 that receives the image signal output from the video signal processing unit 204 and displays the image signal on a screen.
Fig. 3 is a schematic diagram illustrating a functional unit composition of a light spot position identifying unit 202 in a display module provided by the present invention, where the light spot position identifying unit 202 includes: a screen recognition unit 301, a correction unit 302, a position recognition unit 303; wherein,
the screen recognition unit 301 receives the screen shot signal from the first wireless interface unit 201, recognizes and extracts a video frame including a complete screen and a light spot generated by the laser beam in the screen shot signal, and transmits the extracted video frame to the correction unit 302.
Here, to identify the position of the laser point, the screen of the display module needs to be identified first, and the position of the light point can be determined relatively only after the screen position is identified, so the screen and the light point need to be identified from the original screen image pickup signal by the screen identification unit first, and if the screen and the light point are not identified from the current video frame, the video frame is discarded. The recognition algorithm may be various, for example: the method comprises the steps of firstly carrying out noise reduction on a video frame, then judging whether the video image contains a complete screen shape or not through an image matching technology, if so, further judging whether a highlight laser spot is contained in the screen, and if not, indicating that the identification is successful.
The correction unit 302 performs noise reduction and distortion correction processing on the video frame transmitted from the screen recognition unit, and transmits the processed video frame to the position recognition unit 303. Here, since the screen video captured by the camera unit 111 in the remote control module 110 may be distorted due to a difference in camera angle between the screen image photographed at the tilt angle and the screen image photographed at the center position, an important role of the correction unit 302 is to correct the images, and to correct the photographed images by comparing with the actual size of the built-in screen.
The position recognition unit 303 receives the corrected image, calculates the actual position of the light spot on the screen according to the actual size of the screen, and transmits the calculated position information to the canvas processing unit 203.
Fig. 4 is a schematic structural diagram of a functional unit composition of a canvas processing unit 203 in a display module according to an embodiment of the present invention, where the canvas processing unit includes: a light spot track processing unit 401, a track storage unit 402, a canvas output unit 403; wherein,
a light spot track processing unit 401 that receives the position information of the light spot on the screen output by the light spot position identifying unit 202 and stores the continuous light spot composite light spot tracks in a track storage unit 402 in groups;
a track storage unit 402 that stores all the spot track groups;
the canvas output unit 403 renders the light spot trajectories in the trajectory storage unit 402 on an internal memory canvas in groups, and outputs a canvas video signal to the video signal processing unit 204.
Here, the spot trajectory group refers to a set of spots generated by the laser emission unit 112 of the remote control module 110 during one operation from emission of the laser beam, drawing a line on the screen to turning off the laser beam, and is referred to as one trajectory group.
Fig. 5 is a schematic diagram of a unit function structure of a remote control module 110 in a display device according to an embodiment of the present invention, where the remote control module includes: a laser emitting unit 112, an image pickup unit 111, a second wireless interface unit 503, a switch key input unit 504; wherein,
the switch key input unit 504 is used for controlling the laser emission unit 112 to be turned on and off, the laser emission unit 112 emits laser beams to the range of the screen of the display module 100, the image pickup unit 111 picks up images of the screen of the display module and transmits the screen image pickup signals to the second wireless interface unit 503, and the second wireless interface unit 503 transmits the screen image pickup signals to the first wireless interface unit 201.
Further, the remote controller module further comprises: an erasing key input unit 505, wherein the erasing key input unit 505 outputs an erasing signal, and the erasing signal is transmitted to the first wireless interface unit 201 through the second wireless interface unit 503; correspondingly, the track storage unit 402 and the canvas output unit 403 in the canvas processing unit 203 are further configured to receive an erase signal transmitted by the first wireless interface unit 201, and after receiving the erase signal, the first wireless interface unit 201 transmits the erase signal to the track storage unit 402 and the canvas output unit 403, so as to empty the memory canvas and clear the optical spot track packet in the track storage unit 402.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (7)
1. A display device, characterized in that the display device comprises:
a first wireless interface unit for receiving screen camera signals in a wireless mode;
a spot position identifying unit that identifies the position of the laser spot on the screen from the screen image pickup signal;
the canvas processing unit is responsible for synthesizing the light spot tracks;
a video signal processing unit which superposes the canvas video signal and the video signal from the video signal source;
the screen display unit is connected with the video signal processing unit;
one end of the light spot position identification unit is connected with the first wireless interface unit, and the other end of the light spot position identification unit is connected with the canvas processing unit; the other end of the canvas processing unit is connected with the video signal processing unit;
the canvas processing unit is used for receiving the position information of the light spots on the screen output by the light spot position identification unit, grouping the continuous light spots into light spot tracks, rendering the light spot tracks on the internal memory canvas in groups, and outputting the canvas video signal to the video signal processing unit.
2. The display device according to claim 1, wherein the light spot position identifying unit includes:
the screen identification unit is used for identifying a video frame comprising a complete screen and a laser spot and is connected with the first wireless interface unit;
the correcting unit is used for correcting the video frame and is connected with the screen identifying unit;
and the position identification unit for calculating the actual position of the laser spot on the screen is respectively connected with the correction unit and the canvas processing unit.
3. The display device according to claim 2, wherein the canvas processing unit comprises:
a track storage unit;
the light spot track processing unit is connected with the track storage unit and synthesizes light spot track groups according to the position of the laser light spot on the screen;
and the canvas output unit for outputting the light spot track grouping on the internal storage canvas is respectively connected with the track storage unit and the video signal processing unit.
4. The display device of claim 1, further comprising a remote control module, the remote control module comprising:
the second wireless interface unit is connected with the first wireless interface unit in a wireless mode;
a laser emitting unit that emits a laser beam to a screen;
the switch key input unit is used for controlling the on and off of the laser emission unit and is connected with the laser emission unit;
and the camera shooting unit is used for shooting the screen and is connected with the second wireless interface unit.
5. The display device as claimed in claim 4, wherein the remote control module further comprises: and the erasing key input unit is used for generating an erasing signal and is connected with the second wireless interface unit.
6. The display device according to claim 1 or 5, wherein the canvas processing unit further comprises: and the erasing unit is respectively connected with the first wireless interface unit, the track storage unit and the canvas output unit.
7. The display device according to claim 4, wherein the first wireless interface unit and the second wireless interface unit are bluetooth interfaces or Wi-Fi wireless transmission protocol interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110075808.2A CN102707839B (en) | 2011-03-28 | 2011-03-28 | A kind of display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110075808.2A CN102707839B (en) | 2011-03-28 | 2011-03-28 | A kind of display device |
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| Publication Number | Publication Date |
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| CN102707839A CN102707839A (en) | 2012-10-03 |
| CN102707839B true CN102707839B (en) | 2015-08-26 |
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| CN104346126B (en) * | 2014-10-31 | 2017-04-05 | 京东方科技集团股份有限公司 | Method, method for displaying image and system that image is shown in real time with mobile spot |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2854700Y (en) * | 2005-08-26 | 2007-01-03 | 李哲 | Radio filmslide player based on embedded system |
| CN101227553A (en) * | 2008-01-25 | 2008-07-23 | 三星电子（中国）研发中心 | Method of direct screen writing for television system distant end |
| CN102073395A (en) * | 2011-02-25 | 2011-05-25 | 上海交通大学 | Wireless laser pen interaction system based on field programmable gate array (FPGA) |
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- 2011-03-28 CN CN201110075808.2A patent/CN102707839B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2854700Y (en) * | 2005-08-26 | 2007-01-03 | 李哲 | Radio filmslide player based on embedded system |
| CN101227553A (en) * | 2008-01-25 | 2008-07-23 | 三星电子（中国）研发中心 | Method of direct screen writing for television system distant end |
| CN102073395A (en) * | 2011-02-25 | 2011-05-25 | 上海交通大学 | Wireless laser pen interaction system based on field programmable gate array (FPGA) |
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| CN102707839A (en) | 2012-10-03 |
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