WO2013123696A1

WO2013123696A1 - Method and system for split-screen display applicable in multi-screen sharing

Info

Publication number: WO2013123696A1
Application number: PCT/CN2012/073738
Authority: WO
Inventors: 喻子达; 王袭; 赵向阳; 韩文; 朴成杰; 黄橙; 周林; 安娜
Original assignee: 海尔集团公司; 海尔集团技术研发中心
Priority date: 2012-02-21
Filing date: 2012-04-10
Publication date: 2013-08-29
Also published as: CN103258521B; CN103258521A

Abstract

A method and system for split-screen display for multi-screen sharing. The split-screen display method comprises the following steps: A. determining the spatial coordinates of a main display device and of display-sharing devices (S20); B. determining, on the basis of the spatial coordinates, directions relative to a screen of the main display device of the display-sharing devices of which the distances to the screen of the main display device are less than a predetermined distance (S30); and, C. splitting, on the basis of the directions of the display-sharing devices relative to the screen of the main display device, a screen image into a main image portion and corresponding extended image portions to be displayed by the main display device and by the display-sharing devices (S40). By detecting the positions and attributes of the sharing devices, the image suitable for display is transmitted to the display-sharing devices for split-screen display, thus implementing addition of a display device at any time and flexible setting in terms of position.

Description

A split screen display method and system for multi-screen sharing

The present invention relates to the field of image display technologies, and in particular, to a split screen display method and system for multi-screen sharing. Background technique

With the development of wireless networks, multi-screen split-screen displays have been combined to form a complete video image, which has become more popular as a "video wall." The existing "TV wall" is mostly used for performances or live scenes. A large screen display wall made up of multiple display devices (LCD TVs) is an image and graphic display system.

However, the display device in the above "TV wall" needs to be fixed in advance, so that the position of the display device cannot be moved, the use is inconvenient, and a new display device cannot be added for screen combination, which has limitations and is obviously not suitable for home use. Summary of the invention

In order to solve the above problems, the present invention provides a split screen display method and system applied to multi-screen sharing, so as to realize adding a display device at any time and flexibly setting a position.

The split screen display method applied to multi-screen sharing provided by the invention includes the steps of:

A. Determine the spatial coordinates of the main display device and each shared display device;

B. determining, according to the space coordinates, a direction of each shared display device that is smaller than a set distance from the main display device screen relative to the main display device screen;

C. Dividing the screen image into a main image portion and a corresponding respective extended image portion according to the direction of each shared display device relative to the main display device screen, and respectively displayed by the main display device and each shared display device.

From the above, the present invention detects the direction of the shared device, and transmits an image suitable for display to the shared display device for split-screen display, thereby realizing adding the display device at any time and flexibly setting Location.

Optionally, determining screen attribute parameters of the primary display device and each shared display device;

The segmentation described in step C is also performed according to the above screen attribute parameters.

Optionally, the screen attribute parameters include: a screen size and a resolution.

From above, the image is segmented by determining the parameters of the display device to achieve an optimal display effect.

Optionally, the method further includes: magnetically causing the main display device to be coupled to the border of the screen of the shared display device.

From the above, the display devices are glued together by the magnetic force, and the gap between the devices is reduced to achieve a better split screen display effect.

Optionally, the step of magnetically causing the main display device to collide with the frame of the screen of the shared display device includes:

At least one microelectromagnet is disposed in the screen frame of the main display device and/or the shared display device;

Controlling the supply of power to the microelectromagnet produces a magnetic force that causes the main display device to engage the bezel of the screen of the shared display device.

From above, by controlling the current direction of the power supply and the power supply, the magnetic poles of the screen frame to which the display device is attached are different to attract.

Optionally, controlling the power supply to the power supply of the micro electromagnet comprises: controlling power supply of the micro electromagnet corresponding to the frame to generate a magnetic force according to a direction of the shared display device relative to the screen of the main display device.

From above, by controlling the power supply of the micro electromagnet of the frame, a plurality of shared display settings are realized, and the position where the shared display device and the main display device screen border are connected is determined, and the shared display device is determined to be played according to the position of the screen border. The position and size of the window of the extended image.

Optionally, the step of determining a location where the shared display device is in contact with the main display device screen frame comprises: The screen frame of the main display device/shared display device is further provided with respective magnetic induction devices, and the respective magnetic induction devices are arranged, and the shared display device and the main display are determined according to the positions of the respective microelectromagnets detected by the respective magnetic induction devices. The location where the device screen border is snapped.

From above, the position of the micro electromagnet detected by the magnetic induction device determines the relative position of the shared display device at the main display device, and thereby divides the image.

Optionally, the main display device and/or the shared display device screen border set at least one matching slot;

The main display device is attached to the border of the shared display device screen through the slot.

From the above, by combining the main display device with the border of the shared display device screen, a better fixation and a better display effect are achieved.

Correspondingly, the present invention further provides a system for implementing the above-described split screen display method for multi-screen sharing, comprising a main display device and at least one shared display device, the main display device comprising:

a space coordinate determining unit, configured to determine spatial coordinates of the main display device and each shared display device;

a direction determining unit, configured to determine, according to the space coordinate, a direction of each shared display device that is smaller than a set distance from the main display device screen relative to the main display device screen; and an image dividing unit, configured to compare the main display device with respect to the main Displaying a direction of the screen of the device, dividing the screen image into a main image portion and corresponding respective extended image portions; and an image sending unit, configured to encode each extended image portion and transmit to each shared display device in a corresponding direction;

The shared display device includes:

An image receiving unit, configured to receive the extended image portion;

Locating at least one micro-electromagnet in the screen frame of the main display device and/or the shared display device;

The main display device and/or the shared display device further includes an electromagnetic control unit for controlling the power supply to the micro electromagnet to generate a magnetic force to cause the main display device to be coupled to the bezel of the shared display device screen. From the above, the present invention detects the direction of the shared device, and transmits an image suitable for display to the shared display device for split-screen display, thereby realizing adding the display device at any time and flexibly setting the position. DRAWINGS

1 is a schematic flow chart of a split screen display method applied to multi-screen sharing;

2 is a schematic flowchart of a sub-step of step S10;

Figure 3 is a schematic diagram showing the position of the display device and the pointing device;

4 is a schematic diagram showing a positional relationship between a shared display device and a main display device;

5 to 7 are schematic diagrams showing another positional relationship between the shared display device and the main display device. FIG. 8 is a schematic structural diagram of a split screen display system applied to multi-screen sharing. detailed description

The embodiment of the present invention provides a split screen display method applied to multi-screen sharing. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The method includes a main display device and at least one shared display device forming a "display wall". The flow of the split screen display method applied to multi-screen sharing as shown in FIG. 1 includes the following steps:

Step S10: Establish a wireless shared connection between the main display device and the shared display device, and obtain a screen attribute parameter of the other party.

As shown in FIG. 2, the step S10 includes:

Step S101: The shared display device sends the split screen sharing request information to the main display device through a wireless communication network, such as a WIFI network.

The split screen sharing request information includes: screen parameter information such as the size and resolution of the shared display device screen. The shared display device adds the time to send the sharing request information before the split screen sharing request information.

Step S102: The main display device receives the split screen sharing request information, calculates the distance between the main display device and the shared display device according to the time transmitted by the split screen sharing request information, and determines whether the split screen sharing request is acceptable according to the distance. And based on this feedback to the corresponding letter desk Recording the received main display device to the screen sharing request divided time information T _2, and transmits the read-screen sharing request time information Τ ₁ split screen sharing request based on time information transmitted is determined that the main display device and the shared display The distance S between the devices. According to the distance calculation formula: S=V ( Τ ₂ -Τ! ), where V represents the transmission rate of the split screen sharing request information, that is, the wireless transmission rate.

The main display device compares the calculated distance S between the shared display device and the preset distance threshold S, when S>S, indicating that the distance between the main display device and the shared display device is too large, Affecting the effect of the split screen sharing display, the process proceeds to step S103 to reject the sharing; when S < S, indicating that the distance between the main display device and the shared display device is suitable, the shared display device can share the screen with the main display device. The display proceeds to step S104.

Step S103: The main display device sends feedback to the shared display device to reject the split screen sharing request, and the process ends.

Step S104: The main display device feeds back information that allows the split screen sharing request, establishes a split-screen shared connection, and stores screen parameter information of the shared device. The feedback information may also include screen parameter information of the main display device.

From above, the main display device and the shared display device complete the establishment of the split-screen shared connection. Step S20: Determine the spatial coordinates of the main display device and the shared display device.

In this embodiment, the pointing device is further included, and the pointing device is in the same wireless network as the main display device and the shared display device, and is configured to measure the spatial coordinates of the main display device and the shared display device according to the pointing device.

The coordinates of the pointing device are relatively fixed, so the space coordinate of the shared display device is measured based on the pointing device. As shown in FIG. 3, the measuring steps of the spatial coordinates include: Step S201: Calculate the distance of at least three pointing devices to the main display device.

FIG. 3 is a schematic diagram showing the position of the main display device and the pointing device. In this embodiment, the spatial coordinates of the three pointing devices are a ( Xa, Ya, Za), b ( Xb, Yb, Zb ) and c, respectively. (Xc, Yc, Zc), wireless transceiver modules such as infrared, Bluetooth, WIFI or ultrasonic are installed on the three fixed point devices. Correspondingly, a corresponding wireless transceiver module is also installed in the main display device. Signal transmission can be calculated according to the degree of attenuation of wireless signal transmission The distance, for example, according to the received signal strength indicator (RSI, Received Signal Strength Indicator) formula P _R = P _T /S ⁿ , the distances S _a , S _b of the above three pointing devices and the main display device can be respectively calculated. S _c . among them, ? ! ^ denotes the received power of the receiver's wireless signal, Ρ _τ denotes the transmit power of the sender's wireless signal, S denotes the distance between the wireless signal transceivers, η is the propagation factor, and η in the air may take 3.

Step S202: Calculate the spatial coordinates of the main display device according to the above result and the spatial coordinates of the three pointing devices.

Assuming that the spatial coordinates of the main display device are (Χ, Υ, Ζ), then according to the projection and the Pythagorean theorem, the following formula can be derived:

S _h =^(XX _b ) ² +(YY _b ) ² +(ZZ _b ) ² , and

The spatial coordinates (Χ, Υ, Ζ) of the main display device can be derived from the above three sets of calculation formulas.

The calculation of this step can be calculated by the main display device or by the pointing device. The parameters required for calculating the signal transmission distance and the parameters required for calculating the spatial coordinates of the main display device can be exchanged through the previously established wireless connection.

The calculation of the coordinates of the main display device can also be implemented by other positioning technologies, such as a camera set on a roof or a higher position to acquire a global image including the pointing device and the main display device, and analyze the position of the main display device through images. Positioning. In addition, the picture acquired by one camera can obtain the projection of each shared device of the horizontal projection, and the spatial coordinates of the main display device can be calculated by two or more cameras.

Similarly, using the above method to calculate the spatial coordinates of each shared display device

(Χ',Υ',Ζ'), no longer repeat.

Step S30: According to the calculated spatial coordinates of the main display device and the shared display device, initially determine whether the position of the shared display device relative to the main display device screen enters the set distance, and according to the space coordinate after entering the set distance The direction relative to the main display device screen is determined. The direction of the shared display device relative to the main display device is determined according to the spatial coordinates of the primary display device and the shared display device. The location is used to determine whether the shared display device enters the set distance of the main display device, that is, whether it is close to the main display, and the direction is used to determine which direction the shared display device is located in the up, down, left, and right directions of the main display device.

In addition, in consideration of the positioning accuracy in the step 30, after the step S30 is performed, the close positioning of the main display device and the shared display device can be further performed as the auxiliary positioning, which will be described in detail below.

As shown in FIG. 4 to FIG. 7, in the frame on the four sides of the screen of the main display device, a plurality of micro electromagnets 51 (in which only a part of the micro electromagnets sharing the display device adjacent to the main display device) are displayed, in sharing A number of miniature electromagnets 51 are also provided at a number of locations within the bezel of the four sides of the display device screen. The magnetic pole direction of the micro electromagnet is arranged on the four sides of the vertical screen, and the direction of the magnetic pole is controlled by controlling the direction of the power supply to the micro electromagnet and the current supplied by a switch. When the shared display device is placed in contact with the main display device, by changing the current direction of the shared display device and the main display device, the generated magnetic poles are opposite to each other, thereby causing the main display device to attract the shared display device by magnetic force. Thus, the gap between the two can be reduced, thereby providing a better split screen display effect.

When one of the shared display device and the main display device is provided with the above-mentioned micro electromagnet, it is only necessary to control the power supply to pull the screen frame of the other device (provided that the screen frame without the electromagnet is made of iron), and When the shared display device and the main display device are both provided with the above-mentioned micro electromagnets, it is necessary to control the current direction of the power supply and the power supply to ensure that the magnetic poles of the screen frames attached to the two display devices are different to attract.

In addition, in order to detect the position where the shared display device is attached to the main display device to determine the play window of the extended image, the magnetic induction device may be disposed at the position of the micro electromagnet, and when the micro electromagnet is attracted, it may be correspondingly The magnetic induction device of the position detects, for example, the detection according to the magnitude of the magnetic flux and the magnitude of the magnetic force. Thus, when the micro-electromagnets in the frame are respectively detected by the magnetic induction devices corresponding to the respective positions, the device can report the information. The magnetic sensing device determines which positions of the miniature electromagnets are attracted, thereby determining that the shared display device is located at a specific relative position of the main display device. When the magnetic induction devices of the electromagnets R01 to R07 corresponding to FIG. 4 can detect that the magnetic force or the magnetic flux is maximum, the electromagnets L01 to L07 correspond to the positions of the electromagnets R01 to R07, respectively, so as to be determined according to the determined The position of the fit is determined to determine the playback of the extended image portion. For this example, it is detected that the fit height is exactly the same as the height of the shared display device.

As shown in FIG. 6, after the two display devices are attached, after the magnetic sensing device detects the bonding portion (the magnetic or magnetic flux of the bonding portion is maximum), the shared display device determines the height according to the bonding portion. The playing window corresponding to the height of the fitting portion, that is, the portion formed by the dotted line of the screen of the shared display device of FIG. 6 is a playing window for playing the extended image portion, so that although the two display devices are non-rectangular after being attached, the whole The played picture (that is, the picture combined with the main picture and the extended picture part) is still a rectangular picture. It is not difficult to understand that when playing an extended image, the aspect ratio of the original image should be maintained, and the side of the playback window should be close to the edge of the screen as above.

As shown in FIG. 5, after the data sent to the first and second shared display devices is determined by the above step S40, the first and second shared display devices detect the matching height and the height of the main display device, thereby Use the corresponding playback area to play the corresponding extended image portion.

As shown in FIG. 7 , after determining the positions of the first and second shared display device bonding portions, the first and second shared display devices respectively play the respective extended images received by the respectively determined matching portion heights. .

The magnetic induction device for closely positioning the main display device and the shared display device is configured to detect the positions of the two display devices, and the magnetic induction device may select a Near Field Communication (NFC) chip.

In addition, the position of the two display devices can be selected to select ultrasonic positioning, slot positioning, or infrared detection positioning. Wherein, the slot positioning is implemented by a gold finger or a trigger switch. The slot positioning allows the main display device to be attached to the border of the shared display device screen to achieve seamless connection and secure positioning.

In addition, the method for improving the accuracy of the position detection may also be implemented by using an image processing method, that is, an image including the main display device and the shared display device is captured by the camera, and the image analysis determines the position of the main display device and the shared display device. Step S40: The main display device expands and divides the image according to the direction, location, and attribute parameters of the shared display device, and encodes the image extension portion to be sent to the shared display device according to the direction and location of the shared display device, and is displayed by the main display. The device and the shared display device are displayed in separate screens.

In addition, the present invention further provides a system for implementing the above-described split screen display method for multi-screen sharing, which includes a main display device 81 and at least one shared display device 82. As shown in FIG. 8, the main display device 81 includes:

The first sharing unit ₈ 1 1 is for receiving and feeding back the sharing request information.

The distance calculating unit 812 is configured to calculate a distance between the shared display devices according to the sending and receiving time of the sharing request information, and determine a size of the calculated distance and the distance threshold.

The space coordinate determining unit 813 is configured to determine spatial coordinates of the main display device and the shared display device each smaller than the distance threshold. In addition, the space coordinate determining unit 813 can also be implemented by the pointing device.

The direction determining unit 814 is configured to determine the direction of the respective shared display devices that are smaller than the set distance from the main display device screen.

The image dividing unit 815 is configured to divide the screen image into a main image portion and corresponding respective extended image portions according to directions of the respective shared display devices with respect to the main display device screen, and are respectively displayed by the main display device and the respective shared display devices.

The image transmitting unit 818 is configured to encode the extended image portion, and correspondingly send the divided images according to directions of the respective shared display devices with respect to the main display device screen.

The first miniature electromagnet set 816 is mounted on the display device screen frame for absorbing the display device and positioning. The first electromagnet group 816 includes at least one neodymium type electromagnet.

In addition, a first electromagnetic control unit 817 is further configured to control the power supply to the first micro electromagnet group 816 to generate magnetic force to cause the main display device to collide with the frame of the screen of the shared display device. A magnetic induction device (not shown) for detecting the suction position of the first micro electromagnet group 816 and the second micro electromagnet group 824 described later.

The image dividing unit 815 is further configured to divide the image according to the pickup position of the first micro electromagnet group 816 and the second micro electromagnet group 824 detected by the magnetic induction device. Preferably, the image dividing unit 815 divides the image into a rectangular picture corresponding to the height of the fitting portion.

The first display unit 819 is configured to display a main image portion.

The shared display device 82 includes:

The second sharing unit 821 is configured to send the sharing request information.

The image receiving unit 822 is configured to receive the extended image portion and perform decoding processing.

The second image display unit 823 is configured to display the extended image portion.

The second micro electromagnet set 824 is configured to generate a magnetic field different from the magnetic pole of the first micro electromagnet set 816 for suction positioning.

The second electromagnetic control unit 825 is configured to control the magnetic force generated by the power supply of the second 敖-type electromagnet group 824.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention. In general, any modifications, equivalent substitutions, improvements, etc., which are included in the spirit and principles of the present invention, should be included in the present invention. Within the scope of protection of the invention.

Claims

Claim

A split screen display method for multi-screen sharing, characterized in that the method comprises the steps of:

2. The method according to claim 1, further comprising: determining screen attribute parameters of the main display device and each of the shared display devices;

3. The method according to claim 2, wherein the screen attribute parameters comprise: a screen size and a resolution.

4. The method according to claim 1, further comprising: magnetically causing the main display device to collide with a frame of the screen of the shared display device.

The method according to claim 4, wherein the step of magnetically causing the main display device to be coupled to the frame of the screen of the shared display device comprises:

6. The method according to claim 5, wherein controlling the power supply to the micro electromagnet to generate a magnetic force comprises: controlling the power supply of the micro electromagnet corresponding to the frame according to the direction of the shared display device relative to the screen of the main display device To generate magnetic force.

The method according to claim 4, wherein determining a position at which the shared display device is in contact with the main display device screen frame, and determining a position of the window in which the shared display device plays the extended image according to the position of the screen frame being touched And size.

8. The method according to claim 7, wherein the step of determining a position at which the shared display device is in contact with the main display device screen frame comprises:

The screen frame of the main display device/shared display device is further provided with respective magnetic induction devices, and the respective magnetic induction devices are arranged, and the shared display device and the main display are determined according to the positions of the respective microelectromagnets detected by the respective magnetic induction devices. The location where the device screen border is snapped.

9. The method according to claim 1, wherein the main display device and/or the shared display device screen border are provided with at least one matching slot;

10. A split screen display system for multi-screen sharing, comprising a main display device and at least one shared display device, wherein:

The main display device includes:

a direction determining unit, configured to determine, according to the space coordinate, a direction of each shared display device that is smaller than a set distance from the main display device screen relative to the main display device screen; and an image dividing unit, configured to compare the main display device with respect to the main Displaying a direction of the screen of the device, dividing the screen image into a main image portion and respective extended image portions of the corresponding direction; and an image sending unit, configured to encode each extended image portion and send the respective shared display devices in the corresponding direction;

The shared display device includes:

An image receiving unit, configured to receive the extended image portion.

The system according to claim 10, wherein at least one micro electromagnet is disposed in a frame of the main display device and/or the shared display device;

The primary display device and/or the shared display device further includes an electromagnetic control unit for controlling the supply of magnetic force to the microelectromagnet to cause the primary display device to engage the bezel of the shared display device screen.