TW201344516A - Method and system for sharing laser instructions - Google Patents

Abstract

The present invention provides a method and system for sharing laser instructions. The method includes: detecting laser instructions situation of a laser sensor curtain, as it is, the laser sensor curtain link to a source computer; reading a curtain coordinate on the laser sensor curtain when the laser sensor curtain receive a laser instruction; calculating a instruction coordinate of the laser instruction on the source computer's first screen, according to the curtain coordinate and the laser sensor curtain's curtain resolution and the source computer's screen resolution; displaying a red dot image in a location of the instruction coordinates, and sending the first screen's display content and the red dot image to a remote computer. The present invention can share the source computer's laser instructions to the remote computer.

Description

Laser indication sharing method and system

The invention relates to a laser indication sharing method and system.

Today, when the Internet is popular, people in different locations often use different connections to conduct presentations or lectures. In this case, voices are transmitted by telephone, and PPT materials or information are shared through PPT. . When doing Presentation or teaching, lecturers often use a laser pen to indicate the point they are telling. In this case, only the audience at the scene can see the laser pointer of the laser pen, and those who watch the shared information at the far end can not see the laser indication, and it is easy to lose important information.

In view of the above, it is necessary to provide a laser indication sharing method and system for the purpose of sharing the laser indication at the source end to the far end.

The laser indicating sharing method is applied to a computer, and the computer is connected as a source computer to a plurality of remote computers through a network. The method includes the following steps: monitoring step: monitoring a laser indication of a laser sensing screen, the laser sensing The screen is connected with the source computer; the reading step is: when the laser sensing screen receives the laser indication, the coordinates of the screen indicating the laser indicating on the laser sensing screen are read; the calculation step: according to the curtain resolution of the screen coordinate and the laser sensing screen And a screen resolution of the source computer, calculating an indication coordinate of the laser indication on the first screen of the source computer; and displaying step: displaying a red dot image at a position of the laser indication coordinate identifier of the first screen, and The display content of the first screen and the displayed red dot image are sent to the remote computer through the network.

The laser indicating sharing system runs in a computer, and the computer is connected as a source computer to a plurality of remote computers through a network. The system includes: a monitoring module for monitoring a laser indicating condition of the laser sensing screen, the laser The sensing screen is connected to the source computer; the reading module is configured to read the laser coordinate of the laser indicating screen on the laser sensing screen when the laser sensing screen receives the laser indication; the calculation module is configured according to the coordinates of the screen, a screen resolution of the laser sensing screen and a screen resolution of the source computer, calculating an indication coordinate of the laser indication on the first screen of the source computer; and a display module for the laser indication coordinate of the first screen The marked position displays a red dot image, and the display content of the first screen and the displayed red dot image are sent to the remote computer through the network.

Compared with the prior art, the laser indication sharing method and system of the present invention, when the laser pointer indicates the laser sensing screen, the source computer can obtain the laser pointer of the laser pen and transmit the laser indication to the remote end. Computer to achieve the purpose of sharing the laser indication at the source to the far end.

As shown in FIG. 1, it is an architectural diagram of a preferred embodiment of the laser indication sharing system of the present invention.

The laser indicating sharing system 10 runs in the source computer 1, and the source computer 1 further includes a first screen 11. The first screen 11 can be a display screen of the source computer 1 or a display device externally connected to the source computer 1. In the preferred embodiment, the first screen 11 is used as the display screen of the source computer 1 as an example. Introduction. The first screen 11 can display a document, which includes a PPT (PowerPoint) document, a Word document, and other forms of documents.

The source computer 1 is connected to a plurality of remote computers 3 via the network 2 (only two are shown), and each of the remote computers 3 includes a second screen 30. The network 2 can be an intranet or an Ethernet, or an Internet or other type of communication network. The display content of the first screen 11 is transmitted to the remote computer 3 via the network 2 to realize the screen sharing of the first screen 11 and the second screen 30. At this time, the display content of the second screen 30 and the first screen The screen 11 is the same.

The source computer 1 is further connected to the projector 4 and the laser sensing screen 5, and the projector 4 projects the display content on the first screen 11 to the laser sensing screen 5, and the laser sensing screen 5 can display the first screen 11 The display content on it. The laser-sensitive screen 5 is composed of a series of photoresistors arranged in a row. The photoresistor is subjected to laser irradiation. When receiving a laser indication, the resistance value changes drastically. The laser indication can be emitted by a laser indicating device such as a laser pen. By selecting the spectral response of different materials and different sensitivity photoresistors, the photoresistor can be sensitive only to the light of the laser wavelength and not to the visible light. The implementation of the laser-induced screen 5 is similar to that of a conventional keyboard. The laser-sensing screen 5 can be implemented in various ways, and an implementation will be described in detail below.

In the preferred embodiment, the laser-sensitive screen 5 includes a photoresistor circuit 50 and a circuit encoding unit 51. The photoresistor circuit 50 is composed of a matrix of photosensitive resistors in the form of a matrix of M×N (M, N is an integer greater than 1), wherein the laterally and longitudinally arranged photoresistors are connected to each other and The rightmost photoresistors in each of the horizontally arranged rows are respectively connected to a pull-up resistor, and each pull-up resistor is connected to a +5V power supply, and the lowermost photoresistors in the longitudinally arranged columns are respectively connected with a pull-down resistor, each pull-down The resistor is connected to a +5V power supply.

When the photoresistor receives the laser indication, the resistance of the photoresistor sharply decreases, resulting in a smaller current in the row and column of the photoresistor, and directly leads to the binary output of the row and column of the photoresistor. The value has changed. The change is from 0 to 1 or from 1 to 0, depending on whether the row and column outputs of the photoresistor have a binary value of 0 or 1 when the photoresistor does not receive a laser indication.

As shown in FIG. 4, a 4×4 matrix photoresistor circuit 50 includes four rows A0, A1, A2, and A3, and four columns B0, B1, B2, and B3, each row and column. The four photoresistors are connected to each other, and the rightmost photoresistor of each row is respectively connected with a pull-up resistor, and the lowermost photoresistor of each column is respectively connected with a pull-down resistor, and each pull-up resistor and each pull-down resistor are respectively connected to one + 5V power supply. When the photoresistors crossing the A1 row and the B1 column are irradiated by laser, the resistance of the photoresistor crossing the A1 row and the B1 column sharply decreases, causing the current detected on the two loops of A1 and B1 to become smaller, thereby distinguishing There is a change in the photoresistor crossing the A1 row and the B1 column.

The circuit coding unit 51 is composed of two encoders, wherein the input of one encoder is connected to the leftmost photoresist of each row of the photoresistor circuit 50, which is hereinafter referred to as a row encoder; another encoder The input terminals are coupled to the uppermost photoresistor of each column of the photoresistor circuit 50, which is hereinafter referred to as a column encoder. The output end and the enable end of the row encoder and the column encoder are both connected to the source computer 1. The enable end indicates when the output of the row encoder and the column encoder output is valid. When the output of the row encoder and the column encoder output is valid, the outputs of the row encoder and the column encoder output respectively serve as the y-axis of the curtain coordinates. Value and x-axis value.

As shown in FIG. 5, it is a row encoder and a column encoder corresponding to the photoresistor circuit 50 shown in FIG. 4. The input terminals A0, A1, A2, and A3 of the row encoder are respectively associated with the A0 of the photoresistor circuit 50. , A1, A2, A3 four rows of the leftmost photoresistor connection, the input terminals B0, B1, B2, B3 of the column encoder are connected with the uppermost photoresistor of the four columns B0, B1, B2, B3 of the photoresistor circuit 50, respectively. The output of the encoder and column encoder output is converted into decimal and used as the y-axis value of the curtain coordinates and the x-axis value of the curtain coordinates.

As shown in FIG. 6, it is the truth table of the row encoder and column encoder of FIG. When the photoresistor does not receive the laser indication, the row and column output of the photoresistor has a binary value of 1; and the enable end is 1 indicating that the output of the row encoder and the column encoder is invalid, and the enable end is 0. The output of the encoder and column encoder is valid. Suppose that the point where the intersection of row A2 and column B1 of Fig. 4 receives the laser indication, the binary output of the A2 row and the B1 column is 0 at this time, and the remaining digits of all the row and column outputs are 1, then Y1Y0 can be obtained. The value of 10 is X, and the value of X1X0 is 01. After converting Y1Y0 and X1X0 into decimal, the value of the curtain coordinates is (1, 2).

According to the coding principle of the encoder, when the 4×4 matrix photoresistor circuit 50 is recognized, there are four inputs for the row and the column, and the row and column outputs only need 2 bits (bit, information unit). The coded output can reflect the four inputs of the row and column. Similarly, assuming that the photoresistor circuit 50 is an 800×600 matrix, that is, the horizontal row has 800 inputs, and the vertical column has 600 inputs. At this time, the row output only requires 10 bits of coded output (2 of 10) The power is 1024), and the column output requires only 10 bits of coded output to mark each point on the laser-sensitive screen 5.

The number of photoresistors included in each row of the photoresistor circuit 50 (hereinafter referred to as the number of row photoresistors) and the number of photoresistors included in each column (hereinafter referred to as the number of column photoresistors) determine the curtain of the laser-sensitive curtain 5 The degree of resolution of the screen is: the number of row photoresistors × the number of column photoresistors, that is, when the photoresistor circuit 50 is an M×N matrix, the resolution of the screen of the laser-sensitive screen 5 is M×N.

As shown in FIG. 2, it is a functional module diagram of a preferred embodiment of the laser indication sharing system of the present invention.

The laser indication sharing system 10 includes a monitoring module 100, a reading module 101, a computing module 102, a display module 103, and a setting module 104. The function of each module will be described in detail in conjunction with the flowchart of FIG.

As shown in FIG. 3, it is a flowchart of a preferred embodiment of the laser indication sharing method of the present invention.

In step S10, the monitoring module 100 monitors the laser indication of the laser-induced screen 5.

In the preferred embodiment, the monitoring module 100 determines whether the laser inductive screen 5 receives the laser indication through the enable end of the row encoder and the column encoder in the monitoring circuit encoding unit 51. When the enable end of the row encoder and the column encoder indicates that the output of the output terminal is valid, the monitoring module 100 determines that the laser sensing screen 5 receives the laser indication; at the enable end of the row encoder and the column encoder, an output terminal is indicated. When the output is valid and one indicates that the output of the output terminal is invalid, the monitoring module 100 determines that the hardware circuit of the circuit encoding unit 51 is in error, prompting to replace the circuit encoding unit 51; and indicating the output of the output terminal at the enable end of the row encoder and the column encoder When it is invalid, the monitoring module 100 determines that the laser-induced screen 5 has not received the laser indication and returns to continue monitoring.

As shown in FIG. 6, when the output values of the enable terminals of the row encoder and the column encoder are both 0, the monitoring module 100 determines that the laser sensing screen 5 receives the laser indication; the enable of the row encoder and the column encoder When the terminal output value is 0 and the value is 1, the monitoring module 100 determines that the hardware circuit of the circuit encoding unit 51 is in error; when the output values of the enable terminals of the row encoder and the column encoder are all 1, the monitoring module 100 It was judged that the laser induced screen 5 did not receive the laser indication.

In step S12, when the laser sensing screen 5 receives the laser indication, the reading module 101 reads the screen coordinates of the laser indicating the laser sensing screen 5.

The reading module 101 reads the value of the output of the row encoder and the column encoder in the circuit encoding unit 51, converts the value of the output of the row encoder into a decimal value as a y-axis value of the curtain coordinate, and outputs the output of the encoder at the output of the encoder. After the value is converted to decimal, it is used as the x-axis value of the curtain coordinate, and the coordinates of the curtain (the x-axis value of the curtain coordinates and the y-axis value of the curtain coordinates) are obtained.

Step S14, the computing module 102 calculates an indication coordinate of the laser indication on the first screen 11 of the source computer 1 according to the screen coordinates, the screen resolution, and the screen resolution of the source computer 1 (indicating the coordinate x-axis) Value, indicating the coordinate y-axis value).

The screen resolution is a setting for determining how much information is displayed on the first screen 11, and is measured by a level primitive and a vertical primitive, and is expressed in the form of a level primitive x a vertical primitive. The indication coordinate is composed of an indication coordinate x-axis value and an indication coordinate y-axis value. When calculating, the calculation module 102 calculates by using the following formula: indicating coordinate x-axis value=curtain coordinate x-axis value×level primitive light-sensitive The number of resistances (ie, the coordinate x-axis value is equal to the x-axis value of the curtain coordinates multiplied by the level of the photo-resistance after the leveling element), indicating the coordinate y-axis value = curtain y-axis value × vertical element ÷ column resistance (ie, the coordinate y-axis value is equal to the ratio of the y-axis value of the curtain coordinates multiplied by the vertical element and the number of column photoresistors). For example, when the screen resolution of the first screen 11 is 1024×768, and the resolution of the screen of the laser-sensitive screen 5 is 800×600, the coordinate x-axis value=the curtain coordinate x-axis value×1024÷800 indicates the coordinate y. Axis value = screen coordinate y-axis value × 768 ÷ 600.

In step S16, the display module 103 displays a red dot image at the position of the laser indicating coordinate mark of the first screen 11, and transmits the display content on the first screen 11 and the displayed red dot image through the network 2. To the remote computer 3.

It should be noted that the display content of the first screen 11 and the displayed red dot image can be recombined into a new image on the source computer 1 and then sent to the remote computer 3 through the network 2; The display content of the first screen 11 and the displayed red dot image may not be combined, and the display content of the first screen 11 and the displayed red dot image are simultaneously transmitted to the remote computer 3 in the form of individual individuals. When the remote computer 3 receives the display content and the red dot image on the first screen 11, the same display content and red dot image on the first screen 11 are displayed on the second screen 30. The display of the laser indicating position can be implemented on the remote computer 3.

Before the step S16, the setting module 104 sets the parameter information of the red dot image, and the parameter information includes information such as the shape and size of the red dot image. The setting module 104 can also receive user input and perform parameter information setting of the red dot image according to the user input.

The invention can monitor whether the laser-induced screen 5 receives the laser indication, and when the laser-induced screen 5 receives the laser indication, according to the laser indication, the screen coordinates on the laser-sensitive screen 5, the laser indication is obtained on the source computer 1 a indicating coordinate, and displaying a red dot image at the indicated position, the displayed red dot image is sent to the remote computer 3 through the network 2, and the red dot image is displayed on the remote computer 3, thereby realizing The purpose of sharing the laser indication at the source to the far end.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

1. . . Source computer

10. . . Laser indicating sharing system

11. . . First screen

2. . . network

3. . . Remote computer

30. . . Second screen

4. . . projector

5. . . Laser sensor screen

50. . . Photosensitive resistor circuit

51. . . Circuit coding unit

100. . . Monitoring module

101. . . Read module

102. . . Computing module

103. . . Display module

104. . . Setting module

S10. . . Monitor the laser indication of the laser-induced curtain

S12. . . Reading the laser indicating the coordinates of the curtain on the laser-sensitive screen when the laser-inducing screen receives the laser indication

S14. . . Calculating the indication coordinate of the laser indication on the first screen of the source computer according to the screen coordinates, the resolution of the screen of the laser-sensing screen, and the screen resolution of the source computer

S16. . . Displaying a red dot image at a position of the laser indicating coordinate mark of the first screen, and transmitting the display content of the first screen and the displayed red dot image to the remote computer through the network

1 is a block diagram of a preferred embodiment of a laser pointer sharing system of the present invention.

2 is a functional block diagram of a preferred embodiment of the laser pointer sharing system of the present invention.

3 is a flow chart of a preferred embodiment of the laser indication sharing method of the present invention.

Figure 4 is a 4 x 4 matrix photoresistor circuit.

FIG. 5 is a row encoder and a column encoder corresponding to the photoresistor circuit shown in FIG. 4.

Figure 6 is a truth table of the row encoder and column encoder of Figure 5.

S10. . . Monitor the laser indication of the laser-induced curtain

S12. . . Reading the laser indicating the coordinates of the curtain on the laser-sensitive screen when the laser-inducing screen receives the laser indication

S14. . . Calculating the indication coordinate of the laser indication on the first screen of the source computer according to the screen coordinates, the resolution of the screen of the laser-sensing screen, and the screen resolution of the source computer

S16. . . Displaying a red dot image at a position of the laser indicating coordinate mark of the first screen, and transmitting the display content of the first screen and the displayed red dot image to the remote computer through the network

Claims (10)

A laser indication sharing method is applied to a computer, and the computer is connected as a source computer to a plurality of remote computers through a network, wherein the method comprises the following steps:
Monitoring step: monitoring the laser indication of the laser-induced screen, the laser-sensitive screen is connected to the source computer;
Reading step: when the laser sensing screen receives the laser indication, reading the coordinates of the laser indicating the screen on the laser sensing screen;
Calculating step: calculating an indication coordinate of the laser indication on the first screen of the source computer according to the screen coordinates, the screen resolution of the laser sensing screen, and the screen resolution of the source computer;
Display step: displaying a red dot image at the position of the laser indicating coordinate mark of the first screen, and transmitting the display content of the first screen and the displayed red dot image to the remote computer through the network. The laser indication sharing method of claim 1, wherein the laser sensing screen comprises a photoresistor circuit and a circuit coding unit;
The photoresistor circuit is composed of photosensitive resistors arranged in rows and columns, the photoresistor is in the form of an M×N matrix, and laterally and longitudinally arranged photoresistors are connected to each other;
The output end of the photoresistor circuit is connected to a circuit coding unit, the circuit coding unit is composed of a row encoder and a column encoder, and the output of the row encoder and the column encoder is connected to the source computer;
The output encoders of the row encoder and the column encoder each include an output end and an enable end, and the enable end indicates when the output of the row encoder and the column encoder output is valid, and the output of the row encoder and the column encoder output. When valid, the output of the encoder and column encoder outputs is used as the y-axis value and the x-axis value of the curtain coordinates. The laser indication sharing method of claim 2, wherein the monitoring step comprises:
Obtaining whether the laser-induced screen receives the laser indication by monitoring the enable end of the row encoder and the column encoder in the circuit coding unit;
When the enable end of the row encoder and the column encoder indicates that the output of the output terminal is valid, it is determined that the laser sensing screen receives the laser indication;
When the enable end of the row encoder and the column encoder indicates that the output of the output terminal is valid, and one indicates that the output of the output terminal is invalid, the hardware circuit of the coding unit of the circuit is determined to be in error, prompting to replace the circuit coding unit;
When the enable end of the row encoder and the column encoder indicates that the output of the output is invalid, it is determined that the laser sensing screen does not receive the laser indication. The laser indication sharing method of claim 2, wherein the reading step comprises:
Reading the values of the row encoder and the column encoder output in the circuit coding unit, converting the value of the row encoder output into a decimal value as a curtain coordinate y-axis value, and converting the value of the column encoder output into a decimal As the curtain coordinate x-axis value. The laser indication sharing method of claim 4, wherein the calculating step comprises:
The indication coordinate is composed of an indication coordinate x-axis value and an indication coordinate y-axis value;
Wherein, the x-axis value of the indication coordinate is equal to the ratio of the x-axis value of the curtain coordinate multiplied by the level of the photo-resistor after the level primitive, and the y-axis value of the indication coordinate is equal to the y-axis value of the curtain coordinates multiplied by the vertical primitive and the column The ratio of the number of photoresistors, the screen resolution including level primitives and vertical primitives. A laser indicating sharing system is running in a computer, and the computer is connected as a source computer to a plurality of remote computers through a network, wherein the system comprises:
a monitoring module for monitoring a laser indication of the laser-sensing screen, the laser-sensing screen being connected to the source computer;
The reading module is configured to read the coordinates of the laser indicating the laser on the laser sensing screen when the laser sensing screen receives the laser indication;
a calculation module, configured to calculate an indication coordinate of the laser indication on a first screen of the source computer according to the screen coordinates, the resolution of the screen of the laser sensing screen, and the screen resolution of the source computer;
The display module is configured to display a red dot image at a position of the laser indicating coordinate mark of the first screen, and send the display content of the first screen and the displayed red dot image to the remote computer through the network. The laser indication sharing system of claim 6, wherein the laser sensing screen comprises a photoresistor circuit and a circuit coding unit;
The photoresistor circuit is composed of photosensitive resistors arranged in rows and columns, the photoresistor is in the form of an M×N matrix, and laterally and longitudinally arranged photoresistors are connected to each other;
The output end of the photoresistor circuit is connected to a circuit coding unit, the circuit coding unit is composed of a row encoder and a column encoder, and the output of the row encoder and the column encoder is connected to the source computer;
The output encoders of the row encoder and the column encoder each include an output end and an enable end, and the enable end indicates when the output of the row encoder and the column encoder output is valid, and the output of the row encoder and the column encoder output. When valid, the output of the encoder and column encoder outputs is used as the y-axis value and the x-axis value of the curtain coordinates. The laser indication sharing system of claim 7, wherein the monitoring module monitors the laser indication of the laser-induced screen by the following steps:
Obtaining whether the laser-induced screen receives the laser indication by monitoring the enable end of the row encoder and the column encoder in the circuit coding unit;
When the enable end of the row encoder and the column encoder indicates that the output of the output terminal is valid, it is determined that the laser sensing screen receives the laser indication;
When the enable end of the row encoder and the column encoder indicates that the output of the output terminal is valid, and one indicates that the output of the output terminal is invalid, the hardware circuit of the coding unit of the circuit is determined to be in error, prompting to replace the circuit coding unit;
When the enable end of the row encoder and the column encoder indicates that the output of the output is invalid, it is determined that the laser sensing screen does not receive the laser indication. The laser indication sharing system of claim 7, wherein the reading module reads the curtain coordinates of the laser indicating on the laser sensing screen by the following steps:
Reading the values of the row encoder and the column encoder output in the circuit coding unit, converting the value of the row encoder output into a decimal value as a curtain coordinate y-axis value, and converting the value of the column encoder output into a decimal As the curtain coordinate x-axis value. The laser indication sharing system of claim 9, wherein the calculation module calculates the indication coordinates of the laser indication on the source computer by the following steps:
The indication coordinate is composed of an indication coordinate x-axis value and an indication coordinate y-axis value;
Wherein, the x-axis value of the indication coordinate is equal to the ratio of the x-axis value of the curtain coordinate multiplied by the level of the photo-resistor after the level primitive, and the y-axis value of the indication coordinate is equal to the y-axis value of the curtain coordinates multiplied by the vertical primitive and the column The ratio of the number of photoresistors, the screen resolution including level primitives and vertical primitives.