CN113691786A - Laser projection system and starting method thereof - Google Patents

Laser projection system and starting method thereof Download PDF

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Publication number
CN113691786A
CN113691786A CN202010418860.2A CN202010418860A CN113691786A CN 113691786 A CN113691786 A CN 113691786A CN 202010418860 A CN202010418860 A CN 202010418860A CN 113691786 A CN113691786 A CN 113691786A
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CN
China
Prior art keywords
module
motion compensation
laser projection
image
vbo
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Pending
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CN202010418860.2A
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Chinese (zh)
Inventor
朱亚文
陈许
赵一石
郭大勃
吴超
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Qingdao Hisense Laser Display Co Ltd
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Qingdao Hisense Laser Display Co Ltd
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Application filed by Qingdao Hisense Laser Display Co Ltd filed Critical Qingdao Hisense Laser Display Co Ltd
Priority to CN202010418860.2A priority Critical patent/CN113691786A/en
Priority to PCT/CN2021/082137 priority patent/WO2021232929A1/en
Priority to CN202180036333.8A priority patent/CN115552894A/en
Publication of CN113691786A publication Critical patent/CN113691786A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources

Abstract

The application discloses a laser projection system and a starting method thereof, and belongs to the technical field of projection display. The method comprises the following steps: after the laser projection main board and the motion compensation module are both powered on, the first VBO system starts to perform handshake and controls the image correction module to be powered on after the handshake succeeds, then the second VBO system starts to perform handshake and controls the image display module to be powered on after the handshake succeeds, then the third VBO system starts to perform handshake and controls the image display module to be powered on after the handshake succeeds, so that the image display module can receive VBO image signals which are sent by the laser projection main board and sequentially pass through the motion compensation module and the image correction module, and can project images based on the VBO image signals. Accurate time sequence control of the laser projection main board, the motion compensation module, the image correction module and the image display module is achieved.

Description

Laser projection system and starting method thereof
Technical Field
The application relates to the technical field of projection display, in particular to a laser projection system and a starting method thereof.
Background
The image transmission digital interface standard (VBO) technology has been widely used in 4K ultra high definition laser projection systems.
Currently, most laser projection systems include a VBO system for transmitting VBO signals, for example, the VBO system includes a laser projection main board and an image display module, where the laser projection main board is a transmitting end, and the image display module is a receiving end. The sequence control process of the VBO system is as follows: after a sending terminal and a receiving terminal are powered on, the receiving terminal configures a hot plug detection (HTPDn) control pin and a clock lock (LOCKn) control pin in the receiving terminal into a high level; when the receiving end starts working, the receiving end configures an HTPDn control pin to be a low level, and then CDR tracing (Chinese name: data clock recovery) is carried out; after the CDR tracing is successful, the receiving end configures the LOCKn control pin to be a low level, then ALN tracing (chinese name: data format calibration) is performed, and then the transmitting end may transmit an effective VBO signal to the receiving end. Generally, as long as the LOCKn control pin is configured to be low, the VBO system handshake is successful (i.e., a communication connection capable of transmitting VBO signals is established between the transmitting end and the receiving end).
In order to improve the display effect of the pictures projected by the laser projection system, the laser projection system further needs to include a motion compensation module and an image correction module. However, for a complex laser projection system including a laser projection motherboard, a motion compensation module, an image correction module, and an image display module, only the VBO system including the laser projection motherboard and the image display module can be subjected to timing control, but the VBO system including the laser projection motherboard, the motion compensation module, the image correction module, and the image display module cannot be subjected to accurate timing control, so that abnormal problems such as a blue screen or a flower screen may occur on a picture projected by the laser projection system.
Disclosure of Invention
The embodiment of the application provides a laser projection system and a starting method thereof. The problem that a picture projected by a laser projection system in the prior art may have abnormal problems such as a blue screen or a flower screen can be solved, and the technical scheme is as follows:
in one aspect, a method for starting a laser projection system is provided, where the laser projection system includes: the device comprises a laser projection main board, a motion compensation module, an image correction module and an image display module; the method comprises the following steps:
after a first time length from the power-on of the laser projection main board, the laser projection main board controls the power-on of the motion compensation module;
after the motion compensation module is powered on and the laser projection main board and the motion compensation module successfully handshake, the laser projection main board transmits a VBO image signal to the motion compensation module;
starting from the successful handshake between the laser projection main board and the motion compensation module, and controlling the image correction module to be powered on by the laser projection main board after a second time period;
after the image correction module is powered on and the handshake between the motion compensation module and the image correction module is successful, the motion compensation module transmits the VBO image signal to the image correction module;
after the handshake between the motion compensation module and the image correction module is successful and a third time period passes, the laser projection main board controls the image display module to be powered on;
after the image display module is powered on and the handshake between the image correction module and the image display module is successful, the image correction module transmits the VBO image signal to the image display module;
the image display module projects an image based on the VBO image signal.
In another aspect, a laser projection system is provided, comprising: the device comprises a laser projection main board, a motion compensation module, an image correction module and an image display module; the laser projection system is configured to:
after a first time length from the power-on of the laser projection main board, controlling the power-on of the motion compensation module through the laser projection main board;
after the motion compensation module is powered on and the laser projection main board and the motion compensation module successfully handshake, transmitting a VBO image signal to the motion compensation module through the laser projection main board;
starting from the successful handshake of the laser projection main board and the motion compensation module, and controlling the image correction module to be powered on through the laser projection main board after a second time period;
after the image correction module is powered on and the handshake between the motion compensation module and the image correction module is successful, the VBO image signal is transmitted to the image correction module through the motion compensation module;
after the handshake between the motion compensation module and the image correction module is successful and a third time length is passed, controlling the image display module to be powered on through the laser projection main board;
after the image display module is powered on and the handshake between the image correction module and the image display module is successful, the VBO image signal is sent to the image display module through the image correction module;
projecting, by the image display module, an image based on the VBO image signal.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
after the laser projection main board and the motion compensation module are both powered on, the first VBO system starts to perform handshake and controls the image correction module to be powered on after the handshake succeeds, then the second VBO system starts to perform handshake and controls the image display module to be powered on after the handshake succeeds, then the third VBO system starts to perform handshake and controls the image display module to be powered on after the handshake succeeds, so that the image display module can receive VBO image signals which are sent by the laser projection main board and sequentially pass through the motion compensation module and the image correction module, and can project images based on the VBO image signals. The method and the device realize accurate time sequence control of the laser projection main board, the motion compensation module, the image correction module and the image display module, and avoid the abnormal problems of blue screen or screen splash and the like of the picture projected by the laser projection system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a transmission diagram of a VBO system provided in the related art;
fig. 2 is a flowchart of a method for starting a laser projection system according to an embodiment of the present disclosure;
fig. 3 is a block diagram of a laser projection system according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another laser projection system provided by an embodiment of the present application;
FIG. 5 is a timing diagram of a laser projection system according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of connection between an FPGA and a FLASH according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
In the related art, a laser projection system includes: the device comprises a laser projection main board and an image display module, wherein the laser projection main board and the image display module are also called as VBO systems, the laser projection main board is a sending end of the VBO systems, and the image display module is a receiving end of the VBO systems.
Referring to fig. 1, fig. 1 is a transmission schematic diagram of a VBO system in related art. When the VBO system transmits a VBO signal, two control pins, namely an HTPDn control pin and a LOCKn control pin, are needed, and the two control pins are usually located at a receiving end in the VBO system. The sequence control process of the VBO system is as follows: after the sending end and the receiving end are powered on, the receiving end can configure two control pins of the HTPDn and the LOCKn into a high level, and the connection between the receiving end and the sending end is normal. When the receiver starts to work, the receiver configures the HTPDn control pin to low. Then, the sending end starts CDR tracing, for example, a CDR circuit of the receiving end performs clock signal extraction processing on data sent from the sending end, a PLL (phase locked loop) circuit of the receiving end performs clock locking operation, and if the clock signal is a clock signal required by the receiving end, the receiving end configures the LOCKn control pin to be a low level, which indicates that CDR tracing is completed. Then, ALN training is performed, and then the transmitting end may transmit a valid VBO signal to the receiving end. Generally, as long as the LOCKn control pin is configured to be low, the VBO system handshake is successful (i.e., a communication connection capable of transmitting VBO signals is established between the transmitting end and the receiving end).
In order to improve the display effect of the pictures projected by the laser projection system, the laser projection system further needs to include a motion compensation module and an image correction module. However, at present, accurate time sequence control cannot be performed on the laser projection main board, the motion compensation module, the image correction module and the image display module, so that abnormal problems such as blue screen or screen splash may occur on a picture projected by a laser projection system.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for starting a laser projection system according to an embodiment of the present disclosure. For example, referring to fig. 3, fig. 3 is a block diagram of a laser projection system according to an embodiment of the present disclosure, where the laser projection system may include: the device comprises a laser projection main board, a motion compensation module, an image correction module and an image display module. The laser projection main board, the motion compensation module, the image correction module and the image display module are sequentially connected.
It should be noted that the laser projection motherboard and the motion compensation module in the laser projection system may also be referred to as a first VBO system, where the laser projection motherboard is a sending end of the first VBO system, and the motion compensation module is a receiving end of the first VBO system.
The motion compensation module and the image correction module in the laser projection system may also be referred to as a second VBO system, where the motion compensation module is a sending end of the second VBO system, and the image correction module is a receiving end of the second VBO system.
The image correction module and the image display module in the laser projection system may also be referred to as a third VBO system, where the image correction module is a sending end of the third VBO system, and the image display module is a receiving end of the third VBO system.
The starting method of the laser projection system can comprise the following steps:
step 101, starting from the power-on of the laser projection main board, after a first time period, the laser projection main board controls the power-on of the motion compensation module.
102, after the motion compensation module is powered on and the laser projection main board and the motion compensation module are successfully handshake, the laser projection main board transmits the VBO image signal to the motion compensation module.
For example, after the motion compensation module is powered on, a certain time period needs to pass, so that the first VBO system handshake is successful. And after the first VBO system is successfully handshake, the laser projection main board transmits the VBO image signal to the motion compensation module.
And 103, starting from the successful handshake between the laser projection main board and the motion compensation module, and controlling the image correction module to be powered on by the laser projection main board after a second time period.
And 104, after the image correction module is powered on and the handshake between the motion compensation module and the image correction module is successful, the motion compensation module transmits the VBO image signal to the image correction module.
For example, after the image correction module is powered on, a certain time period needs to pass, so that the handshake of the second VBO system is successful. And after the second VBO system handshake succeeds, the motion compensation module transmits the VBO image signal to the image correction module.
And 105, starting from the successful handshake of the motion compensation module and the image correction module, and controlling the image display module to be powered on by the laser projection main board after a third time period.
And 106, after the image display module is powered on and the handshake between the image correction module and the image display module is successful, the image correction module transmits a VBO image signal to the image display module.
For example, after the image display module is powered on, a certain time period needs to elapse, so that the handshake of the third VBO system is successful. And after the handshake of the third VBO system is successful, the image correction module transmits a VBO image signal to the image display module.
Step 107, the image display module projects an image based on the VBO image signal.
To sum up, according to the starting method of the laser projection system provided in the embodiment of the present application, after the laser projection motherboard and the motion compensation module are both powered on, the first VBO system starts to perform handshake and after the handshake succeeds, the laser projection motherboard controls the image correction module to be powered on, the second VBO system starts to perform handshake and after the handshake succeeds, the laser projection motherboard controls the image display module to be powered on, the third VBO system starts to perform handshake and after the handshake succeeds, the image display module can receive VBO image signals which are sent by the laser projection motherboard and sequentially pass through the motion compensation module and the image correction module, and the image display module can project images based on the VBO image signals. The method and the device realize accurate time sequence control of the laser projection main board, the motion compensation module, the image correction module and the image display module, and avoid the abnormal problems of blue screen or screen splash and the like of the picture projected by the laser projection system.
Optionally, please refer to fig. 4, where fig. 4 is a schematic structural diagram of another laser projection system provided in the embodiment of the present application. Laser projection mainboard, motion compensation module, image correction module and image display module in this laser projection system all include power module, and this laser projection system can also include: panel with start/standby module. The starting/standby module is respectively connected with a power module in the laser projection main board and a power module in the image display module; the power module in the laser projection mainboard, the power module in the motion compensation module and the power module in the image correction module are connected in sequence.
The laser projection main board may further include: and the SOC (System On Chip) is connected with the starting/standby module in the battery panel, and can send a starting signal to the starting/standby module so that the starting/standby module can supply power to the power supply modules in the laser projection main board, the motion compensation module, the image correction module and the image display module.
In a first VBO system of the laser projection system, the laser projection motherboard 201 is a sending end of the first VBO system, and the motion compensation module is a receiving end of the first VBO system. In the second VBO system, the motion compensation module is a sending end of the second VBO system, and the image correction module is a receiving end of the second VBO system. In the third VBO system, the image correction module is a sending end of the third VBO system, and the image display module is a receiving end of the third VBO system.
The receiving end in each of the first VBO system, the second VBO system, and the third VBO system has: HTPDn and LOCKn.
Referring to fig. 5, fig. 5 is a timing diagram of a laser projection system according to an embodiment of the present application, and in conjunction with the laser projection system shown in fig. 3, the following embodiment further explains and explains steps in a flowchart of the method shown in fig. 1.
For the step 101, after a first time period from the power-on of the laser projection main board, the laser projection main board controls the power-on of the motion compensation module.
When a starting switch in the laser projection system is closed, the SOC in the laser projection main board can control a starting/standby module in the battery board to provide electric energy for a power module in the laser projection main board, so that the laser projection main board is powered on, and the SOC in the laser projection main board can work normally. For example, as shown in fig. 5, VCC _ SOC represents an electrical signal of SOC, and when the signal is at a low level, it represents that there is no electrical energy in the power module in the laser projection motherboard, and the SOC stops operating; when the signal is at a high level, the power module in the laser projection mainboard has electric energy, and the SOC starts to work.
After the laser projection main board is powered on, the laser projection main board needs to be subjected to initial processing and reset processing, after the laser projection main board finishes the initial processing, the state of the laser projection main board is stable, and at the moment, the laser projection main board controls the motion compensation module to be powered on. As shown in fig. 5, the first time period t01 is a time period for the laser projection motherboard to perform initialization processing and reset processing. It should be noted that the initialization processing and the reset processing performed by the laser projection motherboard are as follows: and the SOC in the laser projection main board performs initialization processing and reset processing.
For example, the laser projection motherboard may control the motion compensation module to power up through a General-purpose input/output port (GPIO) of the SOC, as shown in fig. 5, VCC1 represents an electrical signal of the core portion of the motion compensation module, and when the electrical signal is at a low level, it represents that the motion compensation module does not have electrical energy, and the core portion of the motion compensation module stops working; when the signal is high level, it indicates that the motion compensation module has power and the core part of the motion compensation module starts to work.
Moreover, as shown in fig. 5, after the motion compensation module is powered on, both control pins HTPDn1 and LOCKn1 of the motion compensation module (i.e. the receiving end in the first VBO system) need to be configured to be high, so after the first time period t01, the control pin HTPDn1 of the motion compensation module is high, and the control pin LOCKn1 of the motion compensation module is also high.
For step 102, after the motion compensation module is powered on and the laser projection motherboard successfully handshakes the motion compensation module, the laser projection motherboard transmits the VBO image signal to the motion compensation module.
This step may include: after the motion compensation module is powered on, the motion compensation module performs initialization processing and reset processing, and after the laser projection main board and the motion compensation module complete data clock recovery, the laser projection main board transmits a VBO image signal to the motion compensation module.
For example, after the motion compensation module is powered on, the motion compensation module needs to perform an initialization process and a reset process. Furthermore, as shown in fig. 5, the motion compensation module configures the control pin of the HTPDn1 to be at a low level, which indicates that the motion compensation module is normally connected to the laser projection motherboard and normally powered up. After the motion compensation module configures the control pin of the HTPDn1 to be low level, the first VBO system needs to perform CDR tracing, and after the first VBO system completes CDR tracing, the motion compensation module configures the LOCKn1 to be low level, and at this time, the laser projection motherboard can transmit VBO image signals to the motion compensation module. It should be noted that, as shown in fig. 5, after the HTPDn1 control pin of the motion compensation module jumps to low level, the VBO1 signal transmitted in the first VBO system jumps to high level, and after the first VBO system completes CDR tracing, the VBO1 signal transmitted in the first VBO system is a valid VBO image signal.
Alternatively, as shown in fig. 5, after the motion compensation module is powered on, the motion compensation module performs initialization processing and reset processing, and a time period t11 for the first VBO system to complete CDR tracking can be queried from a design specification of the laser projection system, or can be obtained by using a measuring device such as an oscilloscope from the time when the motion compensation module is powered on to the time when the motion compensation module starts to transmit the VBO image signal.
For step 103, starting with the successful handshake between the laser projection motherboard and the motion compensation module, after a second time period, the laser projection motherboard controls the image correction module to be powered on.
This step 103 may include: after the first VBO system is successfully handshake, starting from the successful handshake of the first VBO system, and after a second time period, the laser projection main board controls the image correction module to be powered on.
Optionally, the image correction module may include: a Micro Control Unit (MCU) and a Field Programmable Gate Array (FPGA) connected to the MCU. The MCU in the image correction module may communicate with the SOC via an I2C bus.
In the embodiment, as shown in fig. 5, the second time period t02 is a delay time period after the motion compensation module receives the VBO image signal. For example, when the laser projection main board controls the image correction module to be powered on, the following processes are required: the SOC in the laser projection main board controls the MCU of the image correction module to be powered on through the GPIO port, and after the MCU is powered on and started, the MCU controls the FPGA of the image correction module to be powered on. The second time period t02 is the time period from the power-on start of the MCU in the image correction module to the power-on control of the FPGA by the MCU. Alternatively, the second time period t02 may be measured using a measuring device such as an oscilloscope.
For example, as shown in fig. 5, VCC2 represents an electric signal of the core FPGA of the image correction module, and when the signal is at a low level, it represents that there is no electric power in the image correction module, and the FPGA of the image correction module stops working; when the signal is at a high level, the signal indicates that the image correction module has electric energy, and the FPGA of the image correction module starts to work.
Moreover, as shown in fig. 5, after the image correction module is powered on, both control pins HTPDn2 and LOCKn2 of the image correction module (i.e. the receiving end of the second VBO system) need to be configured to be at a high level, so after the second duration t02, the control pin HTPDn2 of the image correction module is at a high level, and the control pin LOCKn1 of the image correction module is also at a high level.
For step 104, after the image correction module is powered on and the handshake between the motion compensation module and the image correction module is successful, the motion compensation module transmits the VBO image signal to the image correction module.
This step 104 may include: after the image correction module is powered on, the image correction module performs initialization processing and reset processing, and after the motion compensation module and the image correction module complete data clock recovery, the motion compensation module transmits a VBO image signal to the image correction module.
For example, after the image correction module is powered on, the image correction module needs to perform an initialization process and a reset process. For example, the image correction module further includes an spiflah (also referred to as a storage device that operates through a serial interface) connected to the FPGA in the image correction module, and after the MCU in the image correction module controls the FPGA to be powered on, the MCU needs to control the FPGA to load a program, so that the operation of initializing the FPGA can be completed.
Also, as shown in fig. 5, after the image correction module completes the initialization operation, the image correction module needs to configure the control pin of HTPDn2 to be low, which indicates that the image correction module is normally connected to the motion compensation module and is normally powered on. After the image correction module configures the control pin of the HTPDn2 to be low level, the second VBO system needs to perform CDR tracking, and after the second VBO system completes CDR tracking, the image correction module configures the LOCKn2 to be low level, and at this time, the motion compensation module may transmit the VBO image signal to the image correction module. It should be noted that, as shown in fig. 5, after the HTPDn2 control pin of the image correction module jumps to low level, the VBO2 signal transmitted in the second VBO system jumps to high level, and after the second VBO system completes CDR tracing, the VBO2 signal transmitted in the second VBO system is a valid VBO image signal.
Optionally, the FPGA in the image correction module has a DONE pin, and the FPGA can configure the DONE pin to a high level when powering on, and configure the DONE pin to a low level when the startup is completed. Therefore, as shown in fig. 5, after the image correction module is powered on, the time duration t22 for the image correction module to perform the initialization process and the reset process and for the second VBO system to complete CDR tracking may be: the time duration from the time the FPGA in the image correction module is powered on to the time the DONE pin in the FPGA is configured to a low level can be measured by a measurement device such as an oscilloscope.
It should be noted that, after the FPGA in the image correction module is powered on, the MCU in the image correction module needs to configure geometric correction parameters for the FPGA.
And step 105, starting from the successful handshake of the motion compensation module and the image correction module, and controlling the image display module to be powered on by the laser projection main board after a third time period.
This step 105 may include: after the second VBO system is successfully handshake, starting from the second VOB system, and after a third time, the laser projection main board controls the image display module to be powered on.
Optionally, the image display module may include: MCU and the FPGA who is connected with this MCU. The MCU in the image display module may communicate with the SOC via an I2C bus.
In the embodiment of the present application, as shown in fig. 5, the third time period t03 is a delay time period after the VBO image signal is received by the image correction module. For example, when the laser projection main board controls the image display module to be powered on, the following processes are required: the SOC in the laser projection main board controls the MCU of the image display module to be powered on through the GPIO port, and after the MCU is powered on and started, the MCU controls the FPGA of the image display module to be powered on. The third time period t03 is the time period from the power-on start of the MCU in the image display module to the power-on control of the FPGA by the MCU. Alternatively, the third time period t03 may be measured using a measuring device such as an oscilloscope.
For example, as shown in fig. 5, VCC3 represents an electric signal of the core FPGA of the image display module, and when the signal is at a low level, it represents that no electric power exists in the image display module, and the FPGA of the image display module stops operating; when the signal is at a high level, the electric energy of the image display module is indicated, and the FPGA of the image display module starts to work.
Moreover, as shown in fig. 5, after the image display module is powered on, both the HTPDn3 and the LOCKn3 control pins of the image display module (i.e., the receiving end of the third VBO system) need to be configured to be at a high level, so after the third duration t03, the HTPDn3 control pin of the image display module is at a high level, and the LOCKn3 control pin of the image display module is also at a high level.
In step 106, after the image display module is powered on and the handshake between the image correction module and the image display module is successful, the image correction module transmits the VBO image signal to the image display module.
This step 106 may include: after the image display module is powered on, the image display module performs initialization processing and reset processing, and after the image correction module and the image display module complete data clock recovery, the image correction module sends a VBO image signal to the image display module.
For example, after the image display module is powered on, the image display module needs to perform an initialization process and a reset process. For example, the image display module further includes an SPIFLASH connected to the FPGA in the image display module, and after the MCU in the image display module controls the FPGA to be powered on, the MCU needs to control the FPGA to load a program, so as to complete an operation of initializing the FPGA.
Also, as shown in fig. 5, after the image display module completes the initialization operation, the image display module needs to configure the control pin of the HTPDn3 to be low, which indicates that the image display module is normally connected to the image correction module and is normally powered on. After the image display module configures the control pin of the HTPDn3 to be low level, the third VBO system needs to perform CDR tracking, and after the third VBO system completes CDR tracking, the image display module configures the LOCKn3 to be low level, and at this time, the image correction module can transmit the VBO image signal to the image display module. It should be noted that, as shown in fig. 5, after the HTPDn3 control pin of the image display module jumps to low level, the VBO3 signal transmitted in the third VBO system jumps to high level, and after the third VBO system completes CDR tracing, the VBO3 signal transmitted in the third VBO system is a valid VBO image signal.
Optionally, the FPGA in the image display module has a DONE pin, and the FPGA can configure the DONE pin to a high level when powered on, and configure the DONE pin to a low level when the start is completed. Therefore, as shown in fig. 5, after the image display module is powered on, the time duration t33 for the image display module to perform initialization processing and reset processing and the third VBO system to complete CDR tracking may be: the time duration from the time the FPGA in the image display module is powered on to the time the DONE pin in the FPGA is configured to a low level can be measured by a measurement device such as an oscilloscope.
It should be noted that the first time length t01, the time length t11, the second time length t02, the time length t22, the third time length t03 and the time length t33 in the above embodiments all need to add an additional redundant time length. In order to reduce the start-up market of the laser projection system, the redundancy time is not too long. For example, the redundancy duration may be 50 milliseconds.
Optionally, please refer to fig. 6, where fig. 6 is a schematic diagram illustrating connection between an FPGA and a FLASH according to an embodiment of the present application. The FPGA may be connected through an SPI serial bus. The process of controlling the FPGA to load the SPI FLASH by the MCU in the image correction module and the image display module in the above embodiments is as follows: after the MCU controls the FPGA to be powered on, the FPGA clears data stored in a block ROM (read only memory) in the FPGA, and the block ROM is reset to an initial state so as to finish initialization processing of the FPGA. Thereafter, the FPGA configures the level of its INIT (initialization) pin to a high level, and the FPGA determines the initialization configuration mode (which may be, for example, the SPI configuration mode) of the FPGA. Then, the FPGA configures the INIT pin to be low level, and the FPGA can read the data stored in the SPI FLASH. After the FPGA reads the data, the FPGA configures the DONE pin to be a low level, which indicates that the FPGA initialization configuration is completed.
Optionally, in order to observe the power-on condition of the FPGA more clearly, indicator lights may be added to the INIT pin and the DONE pin of the FPGA. The indicating lamp is in a first state when the pin is at a high level and in a second state when the pin is at a low level. The first state is one of a lit state and an extinguished state, and the second state is the other of the lit state and the extinguished state. For example, the INIT pin indicator may be turned on when the INIT pin is at a high level and turned off when the INIT pin is at a low level; the DONE pin indicator lamp may be turned on when the DONE pin is at a high level and turned off when the DONE pin is at a low level.
To sum up, according to the starting method of the laser projection system provided in the embodiment of the present application, after the laser projection motherboard and the motion compensation module are both powered on, the first VBO system starts to perform handshake and after the handshake succeeds, the laser projection motherboard controls the image correction module to be powered on, the second VBO system starts to perform handshake and after the handshake succeeds, the laser projection motherboard controls the image display module to be powered on, the third VBO system starts to perform handshake and after the handshake succeeds, the image display module can receive VBO image signals which are sent by the laser projection motherboard and sequentially pass through the motion compensation module and the image correction module, and the image display module can project images based on the VBO image signals. The method and the device realize accurate time sequence control of the laser projection main board, the motion compensation module, the image correction module and the image display module, and avoid the abnormal problems of blue screen or screen splash and the like of the picture projected by the laser projection system.
An embodiment of the present application further provides a laser projection system, which may include: the device comprises a laser projection main board, a motion compensation module, an image correction module and an image display module. For example, the structure of the laser projection system may refer to the laser projection system shown in fig. 3 or fig. 4. The starting process of the laser projection system is as follows:
after a first time length, controlling the motion compensation module to be powered on through the laser projection main board from the start of the power-on of the laser projection main board; after the motion compensation module is powered on and the laser projection main board and the motion compensation module successfully handshake, transmitting a VBO image signal to the motion compensation module through the laser projection main board; starting from the successful handshake of the laser projection main board and the motion compensation module, and controlling the image correction module to be powered on through the laser projection main board after a second time period; after the image correction module is powered on and the handshake between the motion compensation module and the image correction module is successful, transmitting a VBO image signal to the image correction module through the motion compensation module; starting from the successful handshake of the motion compensation module and the image correction module, and controlling the image display module to be powered on through the laser projection main board after a third time period; after the image display module is powered on and the handshake between the image correction module and the image display module is successful, sending a VBO image signal to the image display module through the image correction module; and projecting an image based on the VBO image signal through the image display module.
In the embodiment of the present application, the receiving end in each of the first VBO system, the second VBO system, and the third VBO system has: HTPDn and LOCKn. That is, the motion compensation module, the image correction module and the image display module all have two control pins, HTPDn and LOCKn.
After the motion compensation module, the image correction module or the image display module is powered on, the two control pins, namely the HTPDn control pin and the LOCKn control pin, are both at a first level. After the motion compensation module, the image correction module or the image display module successfully handshake with the corresponding module, that is, after the first VBO system, the second VBO system or the third VBO system successfully handshake, both the two control pins HTPDn and LOCKn are the first level and the second level. The first level is high relative to the second level.
Optionally, the laser projection system further comprises: the device comprises a first indicator light connected with an HTPDn control pin and a second indicator light connected with a LOCKn control pin. The first indicator light is in a first state when the HTPDn control pin is at a high level, and is in a second state when the HTPDn control pin is at a low level; the second indicator light is in a first state when the LOCKn control pin is at a high level, and is in a second state when the LOCKn control pin is at a low level. The first state is one of a lit state and an extinguished state, and the second state is the other of the lit state and the extinguished state.
For example, the first indicator light may be turned on when the HTPDn control pin is high, and turned off when the HTPDn control pin is low; the second indicator light may be turned on when the LOCKn control pin is at a high level and turned off when the LOCKn control pin is at a low level. The operating personnel can judge the handshake condition of each VBO system by observing the states of the first indicator lamp and the second indicator lamp, and after the VBO system fails in handshake, the operating personnel can conveniently investigate the reason why the VBO system fails.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific principles of the laser projection system described above may refer to the corresponding contents in the embodiment of the foregoing method for starting a laser projection system, and are not described herein again.
In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is intended to be exemplary only, and not to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included therein.

Claims (10)

1. A method of starting a laser projection system, the laser projection system comprising: the device comprises a laser projection main board, a motion compensation module, an image correction module and an image display module; the method comprises the following steps:
after a first time length from the power-on of the laser projection main board, the laser projection main board controls the power-on of the motion compensation module;
after the motion compensation module is powered on and the laser projection main board and the motion compensation module successfully handshake, the laser projection main board transmits a VBO image signal to the motion compensation module;
starting from the successful handshake between the laser projection main board and the motion compensation module, and controlling the image correction module to be powered on by the laser projection main board after a second time period;
after the image correction module is powered on and the handshake between the motion compensation module and the image correction module is successful, the motion compensation module transmits the VBO image signal to the image correction module;
after the handshake between the motion compensation module and the image correction module is successful and a third time period passes, the laser projection main board controls the image display module to be powered on;
after the image display module is powered on and the handshake between the image correction module and the image display module is successful, the image correction module transmits the VBO image signal to the image display module;
the image display module projects an image based on the VBO image signal.
2. The method of claim 1, wherein the first duration is a duration of initialization processing and reset processing of the laser projection motherboard.
3. The method of claim 1, wherein after the power-on of the motion compensation module and the successful handshake between the laser projection motherboard and the motion compensation module, the laser projection motherboard transmits a VBO image signal to the motion compensation module, comprising:
after the motion compensation module is powered on, the motion compensation module performs initialization processing and reset processing, and after the laser projection main board and the motion compensation module complete data clock recovery, the laser projection main board transmits a VBO image signal to the motion compensation module.
4. The method of claim 1, wherein the second duration is a delay duration after the motion compensation module receives the VBO image signal.
5. The method of claim 1, wherein after the image correction module is powered on and the motion compensation module and the image correction module successfully handshake each other, the motion compensation module transmits the VBO image signal to the image correction module, comprising:
after the image correction module is powered on, the image correction module performs initialization processing and reset processing, and after the motion compensation module and the image correction module complete data clock recovery, the motion compensation module transmits the VBO image signal to the image correction module.
6. The method of claim 1, wherein the third duration is a delay duration after the image correction module receives the VBO image signal.
7. The method of claim 1, wherein after the image display module is powered on and the handshake between the image correction module and the image display module is successful, the sending of the VBO image signal to the image display module by the image correction module comprises:
after the image display module is powered on, the image display module performs initialization processing and reset processing, and after the image correction module and the image display module complete data clock recovery, the image correction module sends the VBO image signal to the image display module.
8. A laser projection system, comprising: the device comprises a laser projection main board, a motion compensation module, an image correction module and an image display module; the laser projection system is configured to:
after a first time length from the power-on of the laser projection main board, controlling the power-on of the motion compensation module through the laser projection main board;
after the motion compensation module is powered on and the laser projection main board and the motion compensation module successfully handshake, transmitting a VBO image signal to the motion compensation module through the laser projection main board;
starting from the successful handshake of the laser projection main board and the motion compensation module, and controlling the image correction module to be powered on through the laser projection main board after a second time period;
after the image correction module is powered on and the handshake between the motion compensation module and the image correction module is successful, the VBO image signal is transmitted to the image correction module through the motion compensation module;
after the handshake between the motion compensation module and the image correction module is successful and a third time length is passed, controlling the image display module to be powered on through the laser projection main board;
after the image display module is powered on and the handshake between the image correction module and the image display module is successful, the VBO image signal is sent to the image display module through the image correction module;
projecting, by the image display module, an image based on the VBO image signal.
9. The laser projection system of claim 8, wherein the motion compensation module, the image correction module, and the image display module each have a hot plug detect control pin and a clock lock control pin;
the hot plug detection control pin and the clock locking control pin are both at a first level after the motion compensation module, the image correction module or the image display module is powered on, the hot plug detection control pin and the clock locking control pin are both at a second level after the motion compensation module, the image correction module or the image display module successfully handshake with a corresponding module, and the first level is a high level relative to the second level.
10. The laser projection system of claim 9, further comprising: the first indicator light is connected with the hot plug detection control pin, and the second indicator light is connected with the clock locking control pin.
CN202010418860.2A 2020-05-18 2020-05-18 Laser projection system and starting method thereof Pending CN113691786A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104683714A (en) * 2015-02-04 2015-06-03 四川长虹电器股份有限公司 Time sequence control method of two-stage V-BY-ONE signal system
US20160267431A1 (en) * 2009-04-07 2016-09-15 International Business Machines Corporation Mapping transactions between the real world and a virtual world
CN106507013A (en) * 2016-10-26 2017-03-15 青岛海信电器股份有限公司 The control method of VBO signal transmissions, device and display terminal
CN210381138U (en) * 2019-07-23 2020-04-21 珠海市大晟云视传媒科技有限公司 4K video trapezoidal correction system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103413516B (en) * 2013-08-22 2016-03-30 京东方科技集团股份有限公司 Data transmission device, data transmission method and display device
CN105611286B (en) * 2016-02-18 2017-10-20 青岛海信电器股份有限公司 A kind of video frequency processing chip functional verification apparatus and method
CN105931593B (en) * 2016-06-30 2019-03-19 深圳市华星光电技术有限公司 The display device of circuit structure with the more receiving ends VBO
CN107071568B (en) * 2017-04-10 2019-12-17 青岛海信电器股份有限公司 transmitter and state control method
CN109068132B (en) * 2018-08-22 2020-05-12 广州视源电子科技股份有限公司 VBO display interface test method, device, equipment and storage medium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160267431A1 (en) * 2009-04-07 2016-09-15 International Business Machines Corporation Mapping transactions between the real world and a virtual world
CN104683714A (en) * 2015-02-04 2015-06-03 四川长虹电器股份有限公司 Time sequence control method of two-stage V-BY-ONE signal system
CN106507013A (en) * 2016-10-26 2017-03-15 青岛海信电器股份有限公司 The control method of VBO signal transmissions, device and display terminal
CN210381138U (en) * 2019-07-23 2020-04-21 珠海市大晟云视传媒科技有限公司 4K video trapezoidal correction system

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