CN110650324A - Projection equipment, projection system and projection method - Google Patents

Abstract

The present invention provides a projection device, comprising: a signal input unit for receiving a video signal generated by a video source; a signal output unit for transmitting the video signal received by the signal input unit to a signal image processing unit; a signal image processing unit, used for receiving the video signal transmitted by the signal output unit, and performing image processing on the video signal and projecting and displaying the video signal; the signal output unit is also used for receiving the video signal received by the signal input unit After signal processing, the video signal is output as an input signal of a signal input unit of another projection device. The present invention also provides a projection system and a projection method. Compared with the related art, the projection device, the projection system and the projection method of the present invention are low in cost and convenient to use.

Description

Projection equipment, projection system and projection method

technical field

The present invention relates to the technical field of light and shadow display, and in particular, to a projection device, a projection system and a projection method.

Background technique

With the development of the intelligent era, light and shadow display has become a development trend and has been used in more and more fields, such as projection equipment, especially large-scale exhibitions, conferences, and teaching.

In some special occasions, such as product displays, large conference rooms or auditoriums, multiple display screens (projections) need to be used, and the same content needs to be displayed synchronously. For example, large lectures need different display screens to display the same content.

Among the projection devices in the related art, an external VGA signal distributor is widely used to realize one input and multiple outputs. However, on the one hand, this method will increase a certain cost, and on the other hand, projectors far away from the distributor require a long wire to connect, resulting in cumbersome and confusing wiring.

Therefore, it is necessary to provide a new projection device, projection system and projection method to solve the above problems.

SUMMARY OF THE INVENTION

In view of the above deficiencies of the prior art, the present invention provides a low-cost and easy-to-use projection device, a projection system and a projection method.

In order to solve the above technical problems, the present invention provides a projection device, comprising: a signal input unit for receiving a video signal generated by a video source; a signal output unit for transmitting the video signal received by the signal input unit to the signal and image processing unit; the signal and image processing unit is used to receive the video signal transmitted by the signal output unit and perform image processing on the video signal and project and display it; the signal output unit is also used to convert the signal The video signal received by the input unit is output as an input signal of a signal input unit of another projection device after signal processing.

Preferably, the signal output unit includes a line and field signal control unit with a line and field signal buffer control chip, an RGB signal control unit with an RGB video signal driver chip, a first output unit and a second output unit; the signal input unit The received video signal is processed by the line and field signal control unit and the RGB signal control unit to generate line and field signals and RGB signals, and the first output unit outputs the line and field signals and the RGB signals to a The signal image processing unit and the second output unit output the line field signal and the RGB signal to a signal input unit of another projection device.

Preferably, the video source reads the internal data command of the internal storage chip of the signal image processing unit through the main chip of the signal input unit, and according to the internal data command, the RED signal in the video signal corresponding to the RGB signal is , GREEN signal and BLUE signal are transmitted to the image signal receiving end of the main chip of the signal input unit; at the same time, the video source transmits the signal corresponding to the line and field signals in the video signal to the main chip of the signal input unit. At the horizontal and vertical signal receiving end, the signal image processing unit performs image processing on the received RED signal, GREEN signal, BLUE signal and the horizontal and vertical signal, and then projects and displays it.

Preferably, the signal corresponding to the line and field signals in the video signal is also sent to the line and field signal buffer control chip through the main chip of the signal input unit, and processed by the line and field signal buffer control chip. delivered to the second output unit for output.

Preferably, the RED signal, GREEN signal and BLUE signal in the video signal are sent to the RGB video signal driver chip through the main chip of the signal input unit, and are processed by the RGB video signal driver chip through the RGB video signal driver chip. The second output unit outputs.

Preferably, both the signal input unit and the second output unit of the signal output unit are standard VGA female ports.

The present invention also provides a projection system, comprising at least two projection devices provided by the present invention, wherein the signal input unit of the first projection device is used for connecting a video source, and the second output unit of the first projection device is used for connecting The signal input unit of the second projection device.

Preferably, the second output unit of the first projection device is connected to the signal input unit of the second projection device through a VGA cable.

The present invention also provides a projection method, providing the above-mentioned projection system provided by the present invention, and the method includes the following steps:

electrically connecting the signal input unit of the first projection device with a video source to obtain a video signal;

The second output unit of the first projection device is electrically connected to the signal input unit of the second projection device, and the signal output by the second output unit of the first projection device is used as the input of the second projection device;

The video signal of the video source is projected and displayed synchronously through the signal image processing unit of the first projection device and the signal image processing unit of the second projection device.

Compared with the related art, the projection device, the projection system and the projection method of the present invention add a signal output unit to the projection device for transmitting the video signal received by the signal input unit to the signal image processing unit , and projected and displayed by the image processing unit; at the same time, the signal output unit is used to output the received video signal after signal processing, as the input signal of the signal input unit of another projection device The above structure enables the projection device to realize the output of VGA signals while receiving the dual VGA signal input; further, the projection system can easily realize the function of synchronizing display of multiple projection devices in series, avoiding the need to convert additional signals. Connecting control equipment and wires is not only low cost but also convenient and quick to use.

Description of drawings

The present invention will be described in detail below with reference to the accompanying drawings. The above and other aspects of the present invention will become clearer and easier to understand from the detailed description taken in conjunction with the following drawings. In the attached picture:

1 is a structural block diagram of a projection device of the present invention;

Fig. 2 is the overall circuit structure diagram of the projection device of the present invention;

3 is a circuit structure diagram of a signal input unit and a signal image processing unit of the projection device of the present invention;

Fig. 4 is the circuit structure diagram of the line field signal control unit of the projection equipment of the present invention;

Fig. 5 is the circuit structure diagram of the RGB signal control unit of the projection equipment of the present invention;

Fig. 6 is the circuit structure diagram of the second output unit of the projection device of the present invention;

Fig. 7 is the application scene structure block diagram of the projection system of the present invention;

FIG. 8 is a flow chart of the projection method of the present invention.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The specific implementations/examples described herein are specific implementations of the present invention, and are used to illustrate the concept of the present invention. They are all illustrative and exemplary, and should not be construed as limiting the implementation of the present invention and the scope of the present invention. limit. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the contents disclosed in the claims and the description of the present application, and these technical solutions include any obvious technical solutions to the embodiments described herein. The technical solutions of replacement and modification are all within the protection scope of the present invention.

Referring to FIGS. 1-2 , the present invention provides a projection device 100 , which includes a signal input unit 1 (VGA1in), a signal image processing unit 2 and a signal output unit 3 .

Referring to FIG. 3 , the signal input unit 1 includes a main chip IC1 in the projection device, and the signal input unit 1 is used for receiving a video signal (or an image signal) generated by a video source. The signal input unit 1 is the P1 port of the projection device 100 , that is, the standard VGA female port.

The signal and image processing unit 2 includes an internal storage chip IC2, that is, a CUP. The signal and image processing unit 2 is used for receiving the video signal transmitted by the signal input unit 1 and performing image processing on the video signal and projecting and displaying the video signal.

The signal output unit 3 is used to transmit the video signal received by the signal input unit 1 to the signal image processing unit 2; the signal output unit 3 is also used to transmit the video signal received by the signal input unit 1. The video signal is output after signal processing, and then used as an input signal of a signal input unit of another projection device. The above structure makes the projection device 100 realize the output of the VGA signal while receiving the VGA signal input; further, the projection system 100 can easily realize the function of displaying multiple projection devices in series and synchronously, avoiding the need for additional signal switching. Control equipment and wires, not only low cost but also easy and fast to use.

Please refer to FIGS. 3-5. Specifically, the signal output unit 3 includes a line and field signal control unit 31 with a line and field signal buffer control chip IC3, an RGB signal control unit 32 with an RGB video signal driver chip IC4, and a third An output unit 33 (VGA1 in) and a second output unit 34 (VGA2 out).

The video signal received by the signal input unit 1 is processed by the line and field signal control unit 31 and the RGB signal control unit 32 to generate line and field signals and RGB signals, and the first output unit 33 converts the line and field signals into The field signal and the RGB signal are output to the signal image processing unit 2, and the second output unit 34 outputs the line field signal and the RGB signal to a signal input unit of another projection device.

In this embodiment, it should be noted that the signal input unit 1 is the P1 terminal, which is a standard VGA socket port, including the main chip IC1; the second output unit 34 is the P2 terminal, which is a standard VGA socket The port includes a main chip IC5; the internal storage chip IC2 is a 24LC02 chip, the line and field signal buffer control chip IC3 is a TC7WH125FUK chip, and the RGB video signal driver chip IC4 is an EL5306IUZ-T7 chip. Of course, each chip model is not limited to this, and the above is only an example of the embodiment.

When working, the video source reads the internal data instructions of the internal storage chip IC2 of the signal image processing unit 2 through the main chip IC1 of the signal input unit 1, and according to the internal data instructions The video signal (that is, the RED signal, GREEN signal and BLUE signal corresponding to the RGB signal) is transmitted to the image signal receiving end of the main chip IC1, and the video source simultaneously transmits the video signal (that is, the video signal). The signal corresponding to the line and field signals) is sent to the line and field signal receiving end of the main chip IC1, and the signal image processing unit 2 will receive the video signal, that is, the received RED signal and GREEN signal. , BLUE signal and the line and field signals are projected and displayed after image processing.

Specifically, as shown in FIG. 3 , for example, the video source is a computer, which is connected to the signal input unit 1 of the projection device 100 through a VGA cable, that is, the P1 port. The internal data commands of the internal storage chip IC2 are read through pins 15 and 12 of the main chip IC1 of the P1 port. After the video source reads the corresponding internal data commands, the corresponding RED in the video signal is read. The signal, the GREEN signal and the BLUE signal are transmitted to the image signal receiving pins of the main chip IC1 through the pins 1, pin2 and pin3 of the main chip IC1, that is, the pins 1, pin2 and pin3 of the main chip IC1.

The video source simultaneously sends the necessary horizontal and vertical signals HS1 and VS1 in the video signal to the horizontal and vertical signal receiving pins of the main chip IC1 through pin13 and pin14 of the main chip IC1 through the resistors R10 and R11, that is, The pin4 and pin5 of the main chip IC1.

So far, the video signal of the video source is completely transmitted to the main chip IC1 of the projection device 100 . The projection device 100 is projected and displayed after corresponding image processing, so as to achieve the purpose of displaying the video source image.

Please refer to FIG. 4 , the line and field signals of the video signal are also sent to the line and field signal buffer control chip IC3 through the main chip IC1, and are processed by the line and field signal buffer control chip IC3 and then sent to the The second output unit 34 outputs, and after output, is used as a video source of another projection device.

Specifically, the horizontal and vertical signals HS1 and VS1 in the video signal of the video source are sent to the main chip IC1 through the P1 terminal, and are also sent to the horizontal and vertical signal buffer control chip IC3 through the P1 terminal. The line and field signal buffering controls whether the pin1 and pin7 control signals of the IC3 can be passed, and are also connected to CE, and take the collector level of the transistor Q1. Similarly, when CE obtains a low level, that is, when pin1 and pin7 of the line and field signal buffer control chip IC3 obtain a low level, the line and field signals of HS1 and VS1 can be respectively buffered from the line and field signals from pin3 of the control chip IC3. and pin6 output, and are sent to the line field signals HS2 and VS2 of the P2 port, the P2 port is the second output unit 34 .

Please continue to refer to Figures 5-6, the RED signal, GREEN signal and BLUE signal of the video signal are transmitted to the RGB video signal driver chip IC4 through the main chip IC1, and are sent to the RGB video signal driver chip IC4 through the RGB video signal driver chip IC4. After processing, it is output through the second output unit 34 .

Specifically, the RED signal, GREEN signal and BLUE signal of the video signal of the video source are simultaneously sent to the RGB video signal driver chip IC4 through P1 (the signal input unit 1 ). The INA+ terminal, the INB+ terminal and the INC+ terminal respectively receive three signals of the RED signal, the GREEN signal and the BLUE signal, and output from the OUTA terminal, the OUTB terminal and the OUTC terminal respectively after being processed by the RGB video signal driver chip IC4. And whether the output is controlled by the CEA terminal, CEB terminal, and CEC terminal (corresponding to pin2, pin4 and pin7 of IC4 respectively). The CEA terminal, CEB terminal, and CEC terminal are connected to CE, and the collector level of the Q1 transistor is taken. When the pin6 of the main chip IC1 outputs a high level, the Q1 transistor is turned on. According to the relevant principle, the level at the collector is set to a low level. If it is flat, CE gets a low level, that is, the CEA terminal, CEB terminal, and CEC terminal get a low level, so that the RED signal, the GREEN signal and the BLUE signal can be output from the OUTA terminal, OUTB terminal and OUTC terminal smoothly. The RED signal, the GREEN signal and the BLUE signal are sent to the P2 port after passing through, that is, the RED, GREEN and BLUE of the main chip IC5 included in the second output unit 34 correspond to pin1, pin2 and pin3.

The P2 port of the projection device 100 can transmit the RED signal, the GREEN signal and the BLUE signal to the P1 port of the other projector device through the VGA cable as the input of the other projector device. The other projection device obtains the same RGB signals as the projection device 100; thus, the RED signal, the GREEN signal and the BLUE signal are connected in series from one projection device to the other projection device, and so on. Chain to a third projection device and beyond.

Referring to FIG. 7 , the present invention further provides a projection system 200 , including at least two projection devices 100 , such as X units, numbered as projection devices 1-X respectively. In two adjacent projection devices 100 (projection device 1 and projection device 2), the signal input unit VGA in of the first projection device 1 is used to connect a video source, and the first projection device 1 An output unit is used for projection display, and the second output unit of the first projection device 1 is connected to the signal input unit of the second projection device 2 as an input of the second projection device 2 . By analogy, it can be connected to the third projection device 3 in series until the Xth projection device.

In this embodiment, the second output unit of the first projection device 1 of the projection system 200 is connected to the signal input unit of the second projection device 2 through the VGA cable.

Referring to FIG. 8 , the present invention also provides a projection method, and provides the above-mentioned projection system 200 . Since the specific structures of the projection system 200 and the included projection device 100 have been described in detail in the above description, they are not described here. Repeat. The projection method includes the following steps:

Step S1, electrically connecting the signal input unit of the first projection device to a video source to obtain a video signal;

Step S2, electrically connecting the second output unit of the first projection device to the signal input unit of the second projection device as the input of the second projection device;

Step S3, synchronously project and display the video signal of the video source through the signal and image processing unit of the first projection device and the signal and image processing unit of the second projection device.

Compared with the related art, the projection device, the projection system and the projection method of the present invention add a signal output unit to the projection device for transmitting the video signal received by the signal input unit to the signal image processing unit , and projected and displayed by the image processing unit; at the same time, the signal output unit is used to output the received video signal after signal processing, as the input signal of the signal input unit of another projection device , the above structure enables the projection device to realize the output of VGA signal while receiving the VGA signal input; further enables the projection system to easily realize the function of synchronizing display of multiple projection devices in series, avoiding the need for additional signal switching. Control equipment and wires, not only low cost but also easy and fast to use.

It should be noted that the various embodiments described above with reference to the accompanying drawings are only used to illustrate the present invention rather than limit the scope of the present invention. Those skilled in the art should understand that without departing from the spirit and scope of the present invention, Modifications or equivalent substitutions made to the present invention should all be included within the scope of the present invention. Furthermore, unless the context otherwise requires, words appearing in the singular include the plural and vice versa. Additionally, all or a portion of any embodiment may be used in conjunction with all or a portion of any other embodiment, unless specifically stated otherwise.

Claims (9)

1. A projection device, comprising:

a signal input unit for receiving a video signal generated from a video source;

the signal output unit is used for transmitting the video signal received by the signal input unit to a signal image processing unit;

the signal image processing unit is used for receiving the video signal transmitted by the signal output unit, carrying out image processing on the video signal and carrying out projection display;

the signal output unit is also used for outputting the video signal received by the signal input unit as an input signal of the signal input unit of another projection device after signal processing.

2. The projection apparatus of claim 1, wherein the signal output unit includes a line-field signal control unit having a line-field signal buffer control chip, an RGB signal control unit having an RGB video signal driver chip, a first output unit, and a second output unit; the video signal received by the signal input unit is processed by the line field signal control unit and the RGB signal control unit to generate a line field signal and an RGB signal, the first output unit outputs the line field signal and the RGB signal to the signal image processing unit, and the second output unit outputs the line field signal and the RGB signal to a signal input unit of another projection device.

3. The projection apparatus according to claim 2, wherein the video source reads an internal data command of the internal storage chip of the signal image processing unit via the main chip of the signal input unit, and transmits RED, GREEN, and BLUE signals corresponding to the RGB signals in the video signal to the image signal receiving terminal of the main chip of the signal input unit according to the internal data command; and simultaneously, the video source transmits a signal corresponding to the line and field signals in the video signal to a line and field signal receiving end of a main chip of the signal input unit.

4. The projection apparatus according to claim 2, wherein a signal corresponding to the line-field signal in the video signal is further transmitted to the line-field signal buffer control chip through the main chip of the signal input unit, and is processed by the line-field signal buffer control chip and then transmitted to the second output unit for output.

5. The projection apparatus as claimed in claim 2, wherein the RED signal, the GREEN signal and the BLUE signal of the video signal are transmitted to the RGB video signal driver chip through the main chip of the signal input unit, and are processed by the RGB video signal driver chip and then output through the second output unit.

6. The projection device of claim 2, wherein the signal input unit and the second output unit of the signal output unit are both standard VGA mother board ports.

7. A projection system comprising at least two projection devices as claimed in any of claims 1 to 6, wherein the signal input unit of a first projection device is adapted to be connected to a video source and the second output unit of the first projection device is adapted to be connected to the signal input unit of a second projection device.

8. The projection system of claim 7, wherein the second output unit of the first projection device is connected to the signal input unit of the second projection device via a VGA cable.

9. A method of projection providing a projection system as claimed in any one of claims 7 to 8, characterized in that the method comprises the steps of:

electrically connecting the signal input unit of the first projection device with a video source to obtain a video signal;

electrically connecting the second output unit of the first projection device with a signal input unit of a second projection device, wherein a signal output by the second output unit of the first projection device is used as an input of the second projection device;

and synchronously projecting and displaying the video signals of the video source through the signal image processing unit of the first projection device and the signal image processing unit of the second projection device.

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